CFS Machine Shop provides a variety of precision CNC machining services including CNC Milling & CNC Turning. With the lastest manufacturing technology & advanced CNC machines (3-, 4- and 5-axis machine centers), we can customize all shapes of metal parts to your drawing's specification. No matter it is a small or large production order, we always offer quality products with fast delivery. Contact us today to get a free quote for your project!
CNC Machining Processes
CNC milling is a metal working process that turns solid metal blocks into finished products with desired dimensions by using 3-, 4-, and 5-axis milling machines and a variety of cutting tools.
CNC Turning is an effective manufacturing process that is more suitable to produce round shaped parts by removing material from metal bars or tubes. It includes cutting processes such as boring, grooving, and facing.
Why Order CNC Machined Parts from CFS?
CNC Machining Materials
These are low-carbon metal alloys that shows good mechanical properties, machinability and weldability at a reasonable price. It can also be carburized to increase the hardness. Common grades are: Q235, Q345, 1020, 1045, etc.
Other alloying elements together with carbon forms Alloy steels. They are associated in improving hardness, toughness, fatigue and wear resistance. Common grades are: 40Cr, 4140 (42CrMo), 4340, etc.
Stainless steel alloys offers high strength, ductility, wear and corrosion resistance. You can easily weld, polish, or machine them.
Common grades are: 304, 304, 316, 17-4ph, 2205, etc.
Aluminum alloys show good strength-to-weight ratio, possessing high thermal and electrical conductivity, natural corrosion resistance, low density and it can easily be anodized.
Common aluminum alloys for cnc machining are: 6061, 6063, 6082, 7075, etc.
Brass & copper are basically metal alloys that offers good machinability and excellent electrical and thermal conductivity. They can ideally be used in places where low friction material is required. It’s often used for bus bars, wire connectors, and other electrical applications. Examples of alloys are: C36000, C10100, C11000, etc.
Surface Finish Options
When the CNC machining process is finished, it can creat a smooth surface finish with minimum roughness Ra6.3. The parts will keep as machined surface when there is no additional surface finish requirement. CNC machining can also produce a part with higher surface finishes such as Ra3.2 or Ra1.6.
This is a process where CNC machined parts are sprayed with powdered paint and then baked in an oven under a certain temperature. Compared to painting process, powder coated finish is more durable, as the surface layer of cnc machined parts are strong, wear- and corrosion-resistant. A variety of colors can be chosen to achieve a decorative effect.
Anodizing is one of the most durable finishes that prevents cnc machined parts from scratching. This type of surface finish is only suitable for machined aluminum parts. Like power coating, a wide variety of colors are available to create the desired appearance.
Zinc plating, as known as galvanization, applys a thin coat of zinc to the surface of cnc machined steel parts by electrical current. After forming a protective layer of zinc oxide, cnc machined parts will not rust when exposed to air or water.
Applications of CNC Machining
CNC machining was first used in Aerospace. It is used in this industry because it offers lightweight parts with exceptional physical properties and high tolerances. CNC machining can be used for aircraft parts as well as during the development stages.
Gallery of CNC Machined Parts
Overview: What is CNC Machining?
CNC Machining Basics
CNC (Computure Numerical Control) machining is CNC machine tool processing, is equipped with digital control system of automated machine tools. It is a combination of machinery, automation, computers, and other high-tech new technology. Its basic components are digital control program carrier, machine tool device, drive spindle device, machine tool body, and safety guards.
CNC machining is controlled according to the programmed programming, usually G-code, to make the machine tool machining. The G-code digital language can control the machining process of CNC machine tools. It makes the tool control system use different position coordinates, control the tool feed and spindle speed, coolant and other functions.
The correctness of the toolpath can be analyzed using the CNC machine’s idle run. When the digital program is entered into the machine, the fixture tool and workpiece are installed. When the idle button is pressed, the spindle does not rotate and the table automatically runs along the programmed path. At this step, it is found out if there is any contact between the tool and the workpiece or the fixture. The above operation control is controlled by the cam, die and dividing device in the form of analog quantities. The machining accuracy of the parts is affected by the accuracy of the cams and dies, and it can process complex parts with certain flexibility and versatility and long process preparation time. CNC machining solves the problem of complex and precise, small batch and multi-species machining, and it is widely used in modern industry, which greatly improves the production efficiency of companies.
CNC Machining FAQs
CNC (Computer Numerical Control) machining is a process where computer-controlled machines are used to produce precision parts from a variety of materials such as metal, plastic, and more.
CNC machining can be used on a wide range of materials, including metals like aluminum, brass, copper, and steel, as well as plastics like ABS, polycarbonate, and acrylic.
CNC machining works by using a computer-aided design (CAD) program to create a digital blueprint of the desired product. This blueprint is then uploaded to the CNC machine's computer, which uses the information to control the cutting tools and other machinery to produce the finished product.
CNC machining offers several benefits over traditional manufacturing methods, including increased efficiency, greater precision, reduced waste, and improved production speeds.
CNC milling involves using rotary cutters to remove material from a workpiece, while CNC turning involves rotating the workpiece and using a cutting tool to remove material. CNC milling is typically used for complex, multi-axis designs, while CNC turning is more suitable for cylindrical parts.
The maximum size of parts that can be produced using CNC machining depends on the size of the machine being used. Some machines are designed to produce small, intricate parts, while others are capable of producing much larger parts.
The time it takes to produce a part using CNC machining depends on a number of factors, including the complexity of the part, the size of the part, the material being used, and the accuracy and speed of the machine. Simple parts in CFS Machine shop can be produced in a matter of minutes, while more complex parts may take several hours or even days to produce.
The accuracy of CNC machining depends on a number of factors, including the accuracy of the machine being used, the quality of the tooling, and the skill of the operator. In general, CNC machining in CFS is capable of producing parts with the tolerance ±0.005mm.
CNC machining is used in a wide range of industries, including aerospace, automotive, medical device manufacturing, electronics, and more.