CNC Machining Service

Advantages of CNC Machining

  • Guarantee the tight tolerance
  • Scalability Quantity from 1 to 100,000
  • Over 60 Material Selection
  • Rapid Turnaround
  • Customized Finishes
  • Saving Your Time & Money

Materials

AluminiumAluminum alloy density is low but strength is relatively high close or exceeds high-quality steel plasticity good machinability can be processed into various shapes have excellent conductivity thermal conductivity and corrosion resistance widely used in the industry compared with steel.

Some aluminum alloys can obtain excellent mechanical properties physical properties and corrosion resistance by heat treatment. Hard aluminum alloy belongs to the AI-Cu-Mg series, usually contains a small amount of, heat treatment enhancement. Its characteristics are hardness, but poor plasticity.

Ultra-aluminum alloy Al-1-Al-Al-O system can be enhanced by heat treatment and is the highest strength aluminum alloy at room temperature but corrosion resistance is poor and softening rapidly at high temperature. Wrought aluminum alloy is mainly an alloy of Al-Al alloy although there are many kinds of elements but few contents thus excellent thermoplastic and suitable forging.

Aluminum alloy has excellent properties such as excellent machining properties excellent weldability excellent corrosion resistance toughness high toughness non-deformation material compact non defect easy polishing film excellent oxidation effect etc.

Moderate strength good corrosion resistance good weldability good technological performance (easy extrusion forming) oxidation coloring effect is good. Application scope: architectural windows curtain wall industrial equipment frame accessories solar frame etc.

AL6061, Al6063, AL6082, AL7075, AL5052, A380.

Brass

There are two kinds of brass: ordinary brass and special brass. Brass has good plasticity and corrosion resistance, good deformability, and casting properties, and has strong application value in the industry. According to the different chemical compositions, brass can be divided into two categories: ordinary brass and special brass. The so-called ordinary brass is a copper-zinc binary alloy.

Brass can be divided into ordinary brass and special brass. In order to obtain higher strength, corrosion resistance, and good casting performance, elements such as aluminum, iron, silicon, manganese, and nickel are added to the copper-zinc alloy. Therefore, Copper alloys composed of more than two elements are called special brass.

Ordinary brass is made up of copper and zinc. According to the different content of zinc, it can be divided into single-phase brass and dual-phase brass, but the content of zinc can not exceed 45%, otherwise, the material becomes brittle and can not be used.

Special brass: The multi-component alloy formed by adding other alloy elements to ordinary brass is called brass. The elements that are often added are lead, tin, aluminum, and so on, which can be called lead brass, tin brass, and aluminum brass. The purpose of adding alloying elements. The main purpose is to improve tensile strength and improve processability.

HPb63, HPb62, HPb61, HPb59, H59, H68, H80, H90

Copper

Red copper is pure copper, also known as purple copper. Since its outstanding electrical and thermal conductivity, copper is popularly used in the electrical industry and precision processing industry. The biggest advantage and performance of copper is its good conductivity, which is second only to silver, but the price of copper is much cheaper than silver, and red copper has become the most important part of the electrical industry.

High-purity copper is the primary condition for use in the electrical industry, and purity must be higher than 99.95%. As long as a very small amount of impurities are mixed, the electrical conductivity of the product red copper will decrease greatly, and the oxygen content of copper will also have a great effect on the electrical conductivity. Mainly avoid the following impurities: phosphorus, arsenic, aluminum, lead, antimony, and so on. Such high purity red copper can only be obtained by electrolysis, using raw copper as a positive electrode, pure copper as a negative electrode, and sulfuric acid solution as the electrolyte. In the process of electrolysis, the raw copper on the positive electrode is melted and ionized, and pure copper ions will be adsorbed on the negative electrode to get the pure copper we need.

Applications of red copper: wires, cables, brushes, electric spark etching copper, generators, busbars, switchgear, transformers, heat exchangers, pipes, flat plate collectors for solar heating devices, etc.

C11000, C12000, C12000, C26000, C51000

Steel

Steel is an iron-carbon alloy. We usually call it iron steel, and in order to ensure its toughness and Shaping, the carbon element is no more than 1.7%. In addition to iron and carbon, the other elements of steel include silicon, manganese, sulfur, phosphorus and so on. The other ingredients are to make a difference in the properties of the steel.

Both steel and iron are iron-based iron-carbon alloys, but due to different carbon content, the state and structure of iron-carbon alloys are also different at different temperatures. Iron has poor formability, not easy to deform and poor weldability. these properties of steel are very good, especially when a certain amount of alloy elements are added to the steel, it will have some special properties, such as high strength, wear resistance, heat resistance and good corrosion resistance.

After refining and adding other alloy elements, ordinary steel can produce widely used steels with different properties, such as fatigue resistance, heat resistance, impact resistance, wear resistance, corrosion resistance, high polishing and so on. These excellent steels are widely used in machinery parts, injection mold steel, stamping die steel, aerospace, tools, automobile, home appliances and other industries.

In order to improve the properties of steel, we usually use heat treatment, stress treatment, quenching and tempering treatment, surface coating and so on.

SS303, SS304, SS316, SS416, mild steel, Carbon steel, 4140, 4340, Q235, Q345B, 20#, 45#

Plastic

Plastics are polymers, and their main components are synthetic resins. In addition, according to the need to add some specific uses of additives, such as plasticizers that can improve plasticity, anti-aging agents to prevent the aging of plastics, and so on.

Although the relative molecular weight of the polymer is very large, its composition is not complex and its structure has certain rules. They are made by polymerization of small molecules, such as polyethylene plastics, which are polymerized by ethylene molecules. When polyethylene plastic is heated to a certain temperature range, it begins to soften until it melts into a flowing liquid. Melted polyethylene plastic will become solid again after cooling and then melt into liquid after heating. This phenomenon is called thermoplasticity.

Polyethylene, polyvinyl chloride, and polypropylene are all thermoplastics. And some plastics can only be softened when heated in the manufacturing process and can be molded into a certain shape, after processing will no longer be melted by heat, with thermosetting properties, such as phenolic resin.

Plastic is a poor conductor of heat, which has the function of noise elimination and shock absorption. Hardness, tensile strength, elongation, and impact strength of plastics. Because of its small specific gravity and high strength, the plastic has a higher specific strength.

Plastic parts are widely used in every field of life, such as household appliances, instruments, wires and cables, construction equipment, communications electronics, automotive industry, aerospace, daily hardware, and so on.

ABS, PC, PE, POM, Delrin, Nylon, Teflon, PP, PEI, Peek, Carbon Fiber.

Titanium

Titanium alloys usually used by us consist of titanium aluminum tin vanadium and niobium and different elements are formed in different properties.

The main excellent features of titanium are described below:

Density is small and specific strength is high: titanium density is higher than aluminum but lower than steel copper-nickel but strength lies at the top of the metal.

Corrosion resistance and heat resistance are good. New titanium alloys can be used for long term at temperatures of 600 ℃ or higher.

Low-temperature resistance performance: titanium alloy Ti-Al _ (2), Ti _ (2-O) and Ti alloys represent low-temperature titanium alloys whose strength increases with decreasing temperature, but plastic changes are little. Maintaining good ductility and toughness at-196-253 ℃ low temperature avoids metal cold brittleness and is the ideal material for cryogenic vessel storage tank etc.

Tensile strength is close to its yield strength: titanium shows a high yield strength ratio (tensile strength/yield strength) indicating poor plastic deformation during the forming of titanium material. Because titanium yield limit and elastic modulus ratio are large, titanium forming can be greatly resilient.

Heat transfer performance is better: although thermal conductivity of titanium is lower than carbon steel and copper because titanium has excellent corrosion resistance, the thickness can be greatly thinned, and a heat resistance of surface and steam decrease thermal resistance, too surface without scaling can reduce thermal resistance, so that titanium heat transfer performance increases remarkably.

Based on the above excellent performances titanium alloys are mainly applied in the aerospace aviation industry marine biomedical field automotive industry etc.

Titanium Grade 1, Titanium Grade 2.

Finishing

Machined

The machined surface is the workpiece surface effect obtained by directly processing the workpiece with all kinds of machines and equipment without any post-processing. With the increasing precision of modern machines, the surface quality of workpieces is getting better and better. Although the machining lines can be seen on the workpiece surface, it is actually very smooth, and the general machined surface quality can reach Ra3.2.

Polishing

Polishing is a process of grinding and modifying parts surface by using a variety of tools and media. The function of polishing is to make the part surface more smooth and glossy, but it can not improve the geometric shape and dimensional accuracy of the part. Technically, polishing refers to the use of abrasives and machinery to smooth the part surface, and the use of machinery for applying abrasives to a loose part surface is a more positive process, which will lead to a smoother and brighter surface finish.

The polishing used on mechanical parts is generally divided into three steps:

The first step: The surface is generally rough after the process of scar, mill, NC, spark machine, wire cutting, etc., so we need to polish the part surface with an oilstone.

The second step: After the oilstone operation is the sandpaper work, sandpaper work, we should pay attention to the parts of the round edge, sharp corner position, fillet, and orange peel production.

The third step: We mainly use diamond grinding paste with the precision requirements at Ra0.2, which requires a clean polishing room.

Anodizing

Anodizing is divided into common anodizing and hard anodizing.

Metal anodizing is the process of forming a conversion film with wear resistance, corrosion resistance, and other functional or decorative properties on the metal surface by electrochemical treatment in the electrolytic solution, with the treated parts as the positive pole and the corrosion-resistant material as the negative pole.

The objects of anodizing treatment can be aluminum and aluminum alloy, magnesium alloy, titanium and titanium alloy, etc. The anodizing of aluminum and aluminum alloy is a widely used and fast development in the market.

The main function of anodizing is to improve the hardness, wear resistance, corrosion resistance, and surface coloring of the workpiece, which plays a role in protecting and beautifying the workpiece surface.

Sandblasting is a post-treatment process that uses high-pressure air as the power to spray abrasives into the work requiring surface treatment at a high speed, thus changing the workpiece’s surface. Because of the impact and cutting effect of abrasives on the workpiece surface, the working surface will get different roughness, improve the mechanical properties of the working surface, and improve the fatigue durability of the work. Because of the impact of abrasives, very small micropores are produced on the working surface, thus increasing the adhesion between the work and the coating and prolonging the using life of the coating.

The main functions of the sandblasting are as follows:

To remove oil and rust, sandblasting can remove dirt such as rust skin on the workpiece surface, and form a certain rough surface on the workpiece surface, thus improving the adhesion of plastic powder and paint film.

For the machined workpiece, the burr on the surface can be removed by sandblasting to make the workpiece more beautiful.

For castings or heat-treated parts, sandblasting can remove the oil and oxide scale on the surface, improve the surface finish, and make the workpiece more beautiful.

Powder coated

Electrostatic spraying of powder coating uses static electricity to adsorb the powder coating on the working surface, and the powder is baked at high temperatures to form a solid coating on the part surface.

Electrostatic powder spraying must firstly have an electrostatic generator to produce DC high voltage, a spray gun, a power supply system, and a powder recovery system to spray and atomize the powder. The sprayed workpiece should be grounded to a positive pole, and the negative high voltage generated in the discharge needle gun connected to the powder outlet of the spray gun will produce corona discharge through the discharge needle. At this time, the negatively charged powder particles arrive at the workpiece’s surface under the action of static electricity and compressed airflow.

Because of the electrostatic force attraction, the powder is uniformly adsorbed on the workpiece surface for a while without falling off, and the workpiece enters the curing furnace to flow flat and solidify, control the humidity or time, and finally form a tight, uniform, smooth and dense coating that binds firmly to the workpiece.

Powder spraying makes the product surface smooth and has a coating with strong acid resistance, alkali resistance, crashworthiness, and wear resistance. Besides, the product can withstand strong ultraviolet radiation and acid rain for a long time without coating pulverization, discoloration, shedding, and so on.

Black Oxide

Black oxide is an oxidation treatment for steel surfaces, which is mainly suitable for carbon steel and low alloy steels.

Black oxide heated workpiece (heating temperature is around 550℃) in dense alkali and oxidizer solutions so that a dense oxide film (Fe _ 3-Fe _ 3) was formed on the surface of the steel. The iron oxide membrane can isolate air, prevent oxidation of steel inside and achieve corrosion resistance purposes.

Steel parts are oxidized to produce protective oxide films mainly composed of magnetic oxide iron oxide (Fe-Fe _ O _ 3) whose color is generally black or blue-black, cast steel and silicon steel are brown. Oxidation treatment methods include alkaline oxidation alkali oxidation method acid oxidation method, etc. And it is often used in machinery, precision instruments, weapons and daily necessities protection and decoration.

Whether iron oxide can be oxidized with dense smooth ferric oxide iron oxide, it is crucial to select strong oxidants. Strong oxidizer consists of sodium hydroxide sodium nitrite and phosphoric acid sodium hydroxide. When the color is blue, use their molten solution to handle steel parts; when treated with aqueous solutions to handle steel parts, they will be black.

Brushed

Surface brushed is a kind of surface treatment method which forms lines on the workpiece surface by polishing products and has a decorative effect.

The surface brushed process is used to make decorative surfaces with wire-brushed material for metal stainless steel aluminum surface, and the surface brushed process is also a type of surface-treatment method. It can make the surface clearly display each tiny silk mark, so as to make a metal matte finish fine-brushed luster product. Because wire-brushed surface treatment can make material surface display different texture and make products more beautiful, so pull wire processing has become more and more popular nowadays.

There is no unified classification and title for wire brushed processing. Usually according to surface effects, it is divided into straight wire and silk yarn. Straight silk is also called silk thread; while silk yarn is called snow pattern.

Electroplating

Electroplating is using galvanolysis to plate other types of metals on the workpieces. It uses electrolysis to attach parts surface to the metal film, with the aim of preventing metal oxidation (corrosion), improving abrasion resistance, conductivity, reflective resistance, corrosion resistance (like copper sulfate), and improving the beauty, etc.

Electroplating metal or other insoluble materials, anode plating workpiece, cathode coating metal cations are reduced to form coating surfaces on the workpiece surface. In order to eliminate interference from other cations, and make plating uniformity and firm, an electroplating solution should be used as a plating solution containing plating metal cations to keep the concentration of metal cations unchanged.

Application

Aerospace
Automotive
Medical
Consumer Products
Zeeltronic
Industrial
Energy
Furniture

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Kemal Your CNC Machining Expert

Kemal uses cutting-edge equipment to provide you with a variety of CNC machining services, including milling, turning, EDM, wire cutting, surface grinding, etc. Using imported 3, 4, and 5 axis CNC machining centers, our skilled operators can use a variety of plastic and metal materials to make turning and milling parts. Our CNC machining capability also completes our rapid prototyping service, enabling us to provide a great one-stop solution for your advanced design.

Kemal CNC machining service includes 50 sets of 3, 4, and 5-axis CNC machines and a wide range of auxiliaries, allowing us to win orders with diverse sizes, various materials, and successfully meet your exact deadlines. Whatever it’s a quick-turn in 1 piece or 100,000 units at the right price, Kemal can meet your requirements.

Kemal has passed the quality management system ISO-9001:2015, which helps us to improve our management and quality continuously, so as to keep the quality consistent with customers’ requirements.

FAQs

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CNC MACHINING: THE ULTIMATE FAQ GUIDE

Being established in 1995, Kemal has been a CNC Machining expert for over 20 years. We have 50 sets of CNC Milling Machines for steel processing, 1 set of High-Speed CNC machines with MAKINO branded, as well as 5 sets of CNC Machines for Electrode processing. And you can obtain more about CNC machining and our company in this guide. For any questions, just feel free to contact us, because we are online 24/7.

  • What is CNC Machining?
  • What are the advantages of CNC Machining?
  • What are the features of CNC Machining?
  • How many CNC Machining Machines types?
  • Which types of material could be used for CNC Machining?
  • Which finishing can be used for CNC Machining Parts?
  • What is Polishing for CNC Machining Parts?
  • How many steps for the Polishing on CNC Machining Parts?
  • How to apply CNC Machining?
  • What Machines does Kemal have for CNC Machining?
  • What are your standard tolerances for CNC Machining Parts?
  • What is your MOQ for CNC Machining Parts?
  • How do you ensure your CNC Machining Parts Quality?
  • How do I request for a quote (RFQ) about CNC Machining?
  • What are the best-selling CNC Machining Machines?
  • What are the steps for CNC Machining?
  • What will affect the cost for CNC Machining Parts?
  • How many factors will effect the precise of CNC Machining parts?
  • How do you guarantee the lead time for CNC Machining Parts?
  • What should we consider when choosing a CNC Machining supplier?

 

Q1. What is CNC Machining?

CNC (Computer Numeric Controlled) Machining is the use of CNC machine tools to process metals & Plastics, and also refers to the processing of CNC machining tools. CNC means CNC machine tools are programmed and controlled by CNC machining language (usually called G code). The CNC machining G code language tells the Cartesian position coordinates of the machining tool of the CNC machines and controls the feed speed and spindle speed of the tool, as well as the tool changer, coolant, and other functions.

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Q2. What are the advantages of CNC Machining?

Here are some advantages of CNC machining.
1)The number of fit molds is greatly reduced, and complex fit molds are not required to process parts with complex shapes. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.

2)The processing quality is stable, the processing accuracy is high, and the repeat accuracy is high, which is suitable for the processing requirements of aircraft.

3)The production efficiency is higher in the case of multi-variety and small-batch of production, which can reduce the time of production preparation, machine tool adjustment and process inspection, and also reduce the cutting time due to the use of the best cutting amount.

4)It can process complex profiles that are difficult to be processed by conventional methods, and even process some invisible processing parts.

Q3. What are the features of CNC Machining?

For CNC machining, it has the following 5 features for your reference.
1)High machining precision and stable quality.
2)High production efficiency.
3)Strong adaptability to processing various kinds of objects, such as small volume parts, complex parts with the high precision requirement, expensive parts that are not allowed to be wasted, parts with shortest production time, etc.
4)High automation level and low labor intensity.
5)It is convenient to realize modern management.

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Q4. How many CNC Machining Machines types?

CNC machining machines are designed to manufacture a wide variety of items. In that case, there are various kinds of commonly used CNC machining machines.
1.CNC Milling Machine
It is one of the most common types of CNC machines, a CNC mill cuts various materials by computer control. CNC Mills can translate specific programs of numbers and letters so as to move the spindle in different kinds of ways.

2.CNC Lathe
CNC lathes’ function is to cut workpieces as they are rotated. CNC lathes can do precise cuts fast by using different types of tools.
Compared to manual lathes, these CNC machines are excellent in their precision. They often have fewer axes than CNC milling machines, so they are smaller and more compact.

3.CNC Router
The CNC router is a machine that is used to cut various materials and is very similar to the commonly used handheld router. This type of CNC machine tool can help cut steel, wood, aluminum, composite materials, plastics, and foam.
CNC router is similar to CNC milling machine. It has the ability to use computer numerical control functions to control the router’s running path. Compared with other machines, CNC routers can produce different items in a shorter time so as to reduce waste and increase productivity.

4.CNC Plasma Cutter
The process of the CNC plasma cutter involves the cutting of a material using a plasma torch. This method is most commonly used to cut heavy materials, such as steel and other forms of metal.

5.CNC Electric Discharge Machine
Electric discharge machining (EDM), involves creating a specific shape within a certain material by using electrical discharges or sparks.

6.CNC Laser Cutter
CNC Laser Cutters are similar to CNC plasma machines. And the only difference between them is that lasers are mostly used for cutting and are great when it comes to cutting metals, plastic, or hardwood. The intensity of the laser can be adjusted according to the material density and strength.

CNC Machining Services- CNC Milling -5 Axis CNC Machining

CNC Machining Services- CNC Turning machining

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Q5. Which types of material could be used for CNC Machining?

Basically, CNC machining is suitable for any kind of material, like aluminum alloy, brass, copper, steel, plastics, titanium, etc.
1)Aluminum Alloy
Aluminum alloy density is low but strength is relatively high close to or exceeds high-quality steel plasticity good machinability can be processed into various shapes have excellent conductivity thermal conductivity and corrosion resistance widely used in the industry compared with steel.
Some aluminum alloys can obtain excellent mechanical properties physical properties and corrosion resistance by heat treatment. Hard aluminum alloy belongs to the AI-Cu-Mg series, usually contains a small amount of, heat treatment enhancement. Its characteristics are hardness, but poor plasticity.
Ultra-aluminum alloy Al-1-Al-Al-O system can be enhanced by heat treatment and is the highest strength aluminum alloy at room temperature but corrosion resistance is poor and softening rapidly at high temperature. Wrought aluminum alloy is mainly an alloy of Al-Al alloy although there are many kinds of elements but few contents thus excellent thermoplastic and suitable forging.
Aluminum alloy has excellent properties such as excellent machining properties excellent weldability excellent corrosion resistance toughness high toughness non-deformation material compact non defect easy polishing film excellent oxidation effect etc. Application scope: architectural windows curtain wall industrial equipment frame accessories solar frame etc.
Some common types are: AL6061, Al6063, AL6082, AL7075, AL5052, A380.

2)Brass
There are two kinds of brass: ordinary brass and special brass. Brass has good plasticity and corrosion resistance, good deformability, and casting properties, and has strong application value in the industry. According to the different chemical compositions, brass can be divided into two categories: ordinary brass and special brass. The so-called ordinary brass is a copper-zinc binary alloy.
Brass can be divided into ordinary brass and special brass. In order to obtain higher strength, corrosion resistance, and good casting performance, elements such as aluminum, iron, silicon, manganese, and nickel are added to the copper-zinc alloy. Therefore, Copper alloys composed of more than two elements are called special brass.
Ordinary brass is made up of copper and zinc. According to the different content of zinc, it can be divided into single-phase brass and dual-phase brass, but the content of zinc can not exceed 45%, otherwise, the material becomes brittle and can not be used.
Special brass: The multi-component alloy formed by adding other alloy elements to ordinary brass is called brass. The elements that are often added are lead, tin, aluminum, and so on, which can be called lead brass, tin brass, and aluminum brass. The purpose of adding alloying elements. The main purpose is to improve tensile strength and improve processability.
Some common types are: HPb63, HPb62, HPb61, HPb59, H59, H68, H80, H90.

3)Copper
Red copper is pure copper, also known as purple copper. Since its outstanding electrical and thermal conductivity, copper is popularly used in the electrical industry and precision processing industry. The biggest advantage and performance of copper is its good conductivity, which is second only to silver, but the price of copper is much cheaper than silver, and red copper has become the most important part of the electrical industry.
High-purity copper is the primary condition for use in the electrical industry, and purity must be higher than 99.95%. As long as a very small amount of impurities are mixed, the electrical conductivity of the product red copper will decrease greatly, and the oxygen content of copper will also have a great effect on the electrical conductivity. Mainly avoid the following impurities: phosphorus, arsenic, aluminum, lead, antimony, and so on. Such high purity red copper can only be obtained by electrolysis, using raw copper as a positive electrode, pure copper as a negative electrode, and sulfuric acid solution as the electrolyte. In the process of electrolysis, the raw copper on the positive electrode is melted and ionized, and pure copper ions will be adsorbed on the negative electrode to get the pure copper we need.
Applications of red copper: wires, cables, brushes, electric spark etching copper, generators, busbars, switchgear, transformers, heat exchangers, pipes, flat plate collectors for solar heating devices, etc.
Some common types are: C11000, C12000, C12000, C26000, C51000.

4)Steel
Steel is an iron-carbon alloy. We usually call it iron steel, and in order to ensure its toughness and shaping, the carbon element is no more than 1.7%. In addition to iron and carbon, the other elements of steel include silicon, manganese, sulfur, phosphorus, and so on. The other ingredients are to make a difference in the properties of the steel.
Both steel and iron are iron-based iron-carbon alloys, but due to different carbon content, the state and structure of iron-carbon alloys are also different at different temperatures. Iron has poor formability, not easy to deform, and poor weldability. these properties of steel are excellent, especially when a certain amount of alloy elements are added to the steel, it will have some special properties, such as high strength, wear resistance, heat resistance and good corrosion resistance.
After refining and adding other alloy elements, ordinary steel can produce widely used steels with different properties, such as fatigue resistance, heat resistance, impact resistance, wear resistance, corrosion resistance, and high polishing, etc. These excellent steels are widely used in machinery parts, injection mold steel, stamping die steel, aerospace, tools, automobile, home appliances and other industries.
In order to improve the properties of steel, we usually use heat treatment, stress treatment, quenching and tempering treatment, surface coating and so on.

5)Plastics
Plastics are polymers, and their main components are synthetic resins. What’s more, according to the need to add some specific uses of additives, such as plasticizers that can improve plasticity, anti-aging agents to prevent the aging of plastics, and so on.
Although the relative molecular weight of the polymer is very large, its composition is not complex and its structure has certain rules. They are made by polymerization of small molecules, such as polyethylene plastics, which are polymerized by ethylene molecules. When polyethylene plastic is heated to a certain temperature range, it begins to soften until it melts into a flowing liquid. Melted polyethylene plastic will become solid again after cooling and then melt into liquid after heating. This phenomenon is called thermoplasticity.
Polyethylene, polyvinyl chloride, and polypropylene are all thermoplastics. And some plastics can only be softened when heated in the manufacturing process and can be molded into a certain shape, after processing will no longer be melted by heat, with thermosetting properties, such as phenolic resin.
Plastic is a poor conductor of heat, which has the function of noise elimination and shock absorption. Hardness, tensile strength, elongation, and impact strength of plastics. Because of its small specific gravity and high strength, the plastic has a higher specific strength.
Plastic parts are widely used in every field of life, such as household appliances, instruments, wires and cables, construction equipment, communications electronics, automotive industry, aerospace, daily hardware, and so on.
The common plastics are listed as below: ABS, PC, PE, POM, Delrin, Nylon, Teflon, PP, PEI, Peek, Carbon Fiber.

6)Titanium
Titanium alloys usually used by us consist of titanium aluminum tin vanadium and niobium and different elements are formed in different properties.
The main excellent features of titanium are described below:
Density is small and specific strength is high: titanium density is higher than aluminum but lower than steel copper-nickel but strength lies at the top of the metal.
Corrosion resistance and heat resistance are good. New titanium alloys can be used for the long term at temperatures of 600 ℃ or higher.
Low-temperature resistance performance: titanium alloy Ti-Al _ (2), Ti _ (2-O) and Ti alloys represent low-temperature titanium alloys whose strength increases with decreasing temperature, but plastic changes are little. Maintaining good ductility and toughness at-196-253 ℃ low temperature avoids metal cold brittleness and is the ideal material for cryogenic vessel storage tank etc.
Tensile strength is close to its yield strength: titanium shows a high yield strength ratio (tensile strength/yield strength) indicating poor plastic deformation during the forming of titanium material. Because titanium yield limit and elastic modulus ratio are large, titanium forming can be greatly resilient.
Heat transfer performance is better: although thermal conductivity of titanium is lower than carbon steel and copper because titanium has excellent corrosion resistance, the thickness can be greatly thinned, and a heat resistance of surface and steam decrease thermal resistance, too surface without scaling can reduce thermal resistance, so that titanium heat transfer performance increases remarkably.
Based on the above excellent performances titanium alloys are mainly applied in the aerospace aviation industry marine biomedical field automotive industry etc.
The common types are Titanium Grade 1, Titanium Grade 2.

Material types for CNC Machining services

Q6. Which finishing can be used for CNC Machining Parts?

Mechanical processing surface treatment is an important processing procedure in CNC Machining, and it can play an important role in protecting and beautifying the workpieces. In CNC machining, there are different forms of machining surface treatment. It is necessary to select the correct type of surface treatment during machining according to the material of the workpiece and the processing requirements.
For CNC machining parts, the main types of surface treatment are polishing, electrostatic spraying, baking varnish, zinc plating, chrome plating, nickel plating, titanium plating, gold plating, silver plating, aluminum anodizing, impregnation, oil painting, sandblasting, powder coating, DLC treatment, Teflon treatment, Black oxide,  etc.

Finishing for CNC Machining Services

 

Q7. What is Polishing for CNC Machining Parts?

Polishing is a process of grinding and modifying the surface of parts using a variety of tools and media. The function of polishing is to make the surface of the part more smooth and glossy, and can not improve the geometric shape and dimensional accuracy of the part. Technically, polishing refers to the use of abrasives and machinery to smooth the surface of the part, and the use of machinery to apply abrasives to a loose part surface is a more positive process, which will lead to a smoother, brighter surface finish.

Q8. How many steps for the Polishing on CNC Machining Parts?

The polishing used on CNC machining parts is generally divided into three steps:
The first step, car, mill, CNC, spark machine, wire cutting, and other processes after the surface is generally rough, need to be polished with an oilstone.
The second step, after the oilstone operation is the sandpaper work, sandpaper work, we should pay attention to the parts of the round edge, sharp corner position, fillet, and orange peel production.
The third step, The main use of diamond grinding paste, precision requirements in the R0.2 polishing process requires a clean polishing room.

Q9. How to apply CNC Machining?

CNC machining is a versatile and cost-effective manufacturing process that is compatible with multiple materials. As a result, it can be used in a variety of industries (including aerospace, automotive, medical, consumer goods, industrial, energy, furniture, electronic industries, and so on), for various applications, and can be used in different ways: as a direct manufacturing process, an indirect manufacturing process or in combination with other processes.
The unique advantages of CNC machining and the characteristics of CNC parts (high precision, short turnaround time, good material quality), and even the advantages of being able to handle almost all materials, lead to its unlimited applications.

Q10. What Machines does Kemal have for CNC Machining?

In Kemal, we have several types of CNC machining machines, such as 50 sets of CNC Milling Machines for steel processing, 1 set of High-Speed CNC machines with MAKINO branded, as well as 5 sets of CNC Machines for Electrode processing.

Q11. What are your standard tolerances for CNC Machining Parts?

In general, Kemal manufactures CNC machining parts according to ISO 2768-1. And “F” for machined steel & aluminum, “M” for machined plastic, “C” for vacuum casting.
We can reach tighter tolerances, but it depends on the part geometry and material types.
If you require tighter tolerances than the ISO standard mentioned above, it shall be specified and negotiated during the quoting stage.

 

TOLERANCES ISO tables 2768 for CNC Machining services

Q12. What is your MOQ for CNC Machining Parts?

We do not have any special inquiry for the quantity of the CNC machining parts, because no matter the customer is big or small, Kemal is always welcome you. And our acceptable order quantity can be from 1 piece to 100,000+ pieces.

Q13. How do you ensure your CNC Machining Parts Quality?

Kemal has passed ISO9001: 2015 quality system certification. In order to deliver high-quality parts to our customers, we stringently comply with the ISO standards from raw material income till delivery of 100% inspection every time for each part. We have complete testing equipment at home, and our inspectors and surveyors are professionally trained before working independently.

Quality control for CNC Machining Services

Q14. How do I request a quote (RFQ) about CNC Machining?

For the RFQ about the CNC machining project, the following details are needed for a better evaluation and analysis.
Situation One: CNC machining parts drawing is available.
1)2D / 3D drawings.(2D: DWG / PDF / JPG / dxf, etc.; 3D: IGS / STEP / X-T / CAD, etc.).
2)Material type.
3)Surface treatment.
4)Quantity.
Situation Two: Sample could be provided for our reference without part drawing.

Q15. What are the best-selling CNC Machining Machines?

There are many various brands of CNC machining machines. And metal cutting machines are the most commonly used CNC machines with the highest market share, which include CNC mill, CNC lathe, tapping center, etc. Let’s share some best-selling brands with you.

  • DMG Mori
  • Germany Spinner
  • Germany STAMA
  • Japanese Mori Seiki
  • Japanese Okuma
  • Japanese Yamazaki Mazak
  • Japanese Makino
  • Japanese Toyoda
  • Germany MAG
  • American Hardinge
  • Italian FIDIA
  • Spain Danobat
  • American Haas

Q16. What are the steps for CNC Machining?

Only by fully understanding the steps of CNC machining can we better improve machining efficiency. So it is necessary for us to know the steps of CNC machining.
Step 1: Analyze the processing drawings and determine the processing process.
According to the processing drawings provided by the customer, the operator can analyze the part shape, dimensional accuracy, surface roughness, materials and heat treatment conditions. Then we can select the appropriate machine tools and tools to determine the positioning and clamping device, processing method, and processing sequence and the size of the cutting amount. When determining the machining process, the command function of the CNC machine tool used should be fully considered to give full play to the efficiency of the machine tool, so that the processing route is reasonable and the processing time is short.
Step 2: Reasonably calculate the coordinate value of the tool path.
Calculating the movement track of the center of the tool path to obtain all tool position data based on the geometric dimensions of the machined parts and the programmed coordinate system set.
Step 3: Input parts CNC machining program.
Please pay attention to these two points when writing: Firstly, the standardization of written program should be easy to express and communicate; Secondly, we should be fully familiar with the performance and instructions of the CNC machine tool used.

Q17. What will affect the cost of CNC Machining Parts?

1.Material
Some materials are more difficult to process than others, and some materials are more expensive than raw materials, both of which will increase the processing cost.
2.Dimensions of the CNC machining parts
Without any doubt, the size and overall geometry of the parts are important factors that affect the cost for the CNC machining part. Obviously, the larger the product, the more materials are required. Besides, the more detailed and complex geometric design, the higher the cost of manufacturing.
3.Requirement for CNC machining and manufacturing equipment
Equipment types and quantity also have an important influence on the CNC machining costs.
4.Processing other than CNC machining
Many CNC machining products require additional processing, such as heat treatment, special processing operations, surface treatment and professional coating. All of them will increase the total cost, so we should carefully evaluate whether it is necessary and worthy of doing so.
5.The price of working hours in the market
The factory location and environment will cause a big gap in the working hours and labor costs.

Q18. How many factors will affect the precise of CNC Machining parts?

1.Position mismatch in CNC machine tool processing
Position mismatch means the amount of change or deviation between the actual surface, axis or symmetry plane of the processed part relative to its ideal position, such as perpendicularity, position, symmetry, etc. Usually, the position mismatch in CNC machine tool processing refers to the dead zone mismatch. The cause of the position mismatch is mainly due to the gap and elastic deformation generated during the transmission of the machine tool parts during the processing, and the tool head of the machine tool needs to overcome the friction force during the processing factors.
2.Geometric tolerance
In CNC machine tool processing, because of the influence of external forces and heat generated by the tool and fixture under the influence of external factors, such as the heat generated during processing, the geometric accuracy of the machine tool is affected.
3.Machine positioning
Machine tool positioning has a great influence on the machining accuracy of CNC machine tools. From the structural point of view, the machining errors of CNC machine tools are mostly caused by positioning accuracy. Among them, the feed system of the machine tool is the main link that affects positioning accuracy. The feed system of a CNC machine tool usually consists of two parts: a mechanical transmission system and an electrical control system. The positioning accuracy is related to the mechanical transmission system in the structural design.

Turbo CNC Machining & Impeller CNC Machining services

Q19. How do you guarantee the lead time for CNC Machining Parts?

As we all know, the lead time is one of the most important points that customers care about. So how does Kemal do to guarantee the lead time for the CNC machining parts?
1.Kemal ensures that the same equipment can be used to process the same precision parts, and risk management can be carried out in emergency situations. Especially for our products of mass production, we strive for a stable supply through comprehensive production management to avoid delivery delay. Therefore, we always have two or more of the same equipment to manage the risks in an emergency. If there is a need for surface treatment, we also have a professional partner to cooperate closely to deal with various processing requirements.
2.We operate the equipment 24 hours a day. For new projects, if you can provide drawings and CAD data, we will start and set it up during the day. Since the processing is done at night, the delivery time can be greatly shortened. In addition, we can also respond to requests for repeated CNC machining products within a short delivery time. By operating multiple CNC machining machines for 24-hour production, delivery time can be shortened.

Worm CNC Machining, Gear CNC Machining, Precision CNC Machining services

Q20. What should we consider when choosing a CNC Machining supplier?

When choosing a CNC machining supplier, we should pay attention to these points.
1.Share the inquiry information in public to the greatest extent.
Public bidding is very important for CNC machining projects. Information release must ensure timeliness, so that suppliers have sufficient response time, and the results of inquiries must be announced promptly.
2.Invite more qualified CNC machining suppliers to participate in the inquiry.
3.Do not limit the suppliers’ quantity to “three or more”.
4.Low price should not be the most important factor to be considered when choosing a supplier.