CNC (Computer Numerical Control) machining is a technology that uses computer-controlled machine tools for automated production. It inputs design information into the computer through pre-programming, and then the computer controls the machine tool to perform precise cutting, drilling, milling and other operations. Compared with traditional manual machine tools, CNC machining has higher production efficiency, better machining accuracy and lower labor costs.
CNC machining is one of Elimold’s core digital manufacturing services. CNC uses only the latest automation technology and is ideal for customers’ high-precision machining parts. With increased production, it is also generally a cheaper option (compared to additive manufacturing) and can be used for a variety of materials. Next, let’s take a look at how Elimold’s CNC machining can help you.
Characteristics of CNC machining
As a fully automated subtractive manufacturing process, CNC machining technology enables high-precision component processing. Through precise programming and advanced processing equipment, the processing error can be controlled within a small range to ensure the dimensional accuracy and shape accuracy of the components. Therefore, CNC machining has the following characteristics:
- Fast material removal
- Tight tolerances and high precision
- Ideal for making complex geometries
- Versatile
- Applicable to many different types of substrates
- Unlimited quantities
- Low tool investment
- Quick turnaround
- Parts have full strength
- Excellent surface finish
- Easy to customize
Industries Served by Elimold’s CNC Machining
Aerospace Components: CNC machining is widely used in aerospace and aerospace applications because of the high precision and strength requirements of aerospace components. For example, aircraft engine blades, rocket engine nozzles, etc. can all be produced by CNC machining.
Medical Device Manufacturing: The production of medical devices has high requirements for precision and cleanliness. Using CNC machining can ensure product quality while improving production efficiency. For example, medical implants, prostheses, etc. can be produced by CNC machining.
Electronic Equipment Manufacturing: Electronic equipment has high requirements for the precision and stability of components. By using CNC machining, the performance and quality of electronic products can be improved. For example, circuit boards, mobile phone housings, etc. can all be produced by CNC machining.
Mechanical Parts Manufacturing: CNC machining is widely used in the manufacture of various mechanical parts, such as gears, shafts, bearing seats, etc. These parts usually have complex shapes and precision requirements, and CNC machining can easily meet these requirements.
Mold Manufacturing: Molds are an important part of many industrial products, such as injection molds, die-casting molds, etc. Using CNC machining can improve the manufacturing efficiency and quality of molds, thereby reducing production costs.
Automobile manufacturing: CNC machining technology is widely used in automobile manufacturing to process high-precision parts such as engine parts, gearbox gears, and body molds. Through CNC machining, not only can the manufacturing accuracy of parts be improved, but also production efficiency can be improved and manufacturing costs can be reduced.
Elimold CNC Machining Materials
Due to its versatility, at Elimold, no matter which material you use, you need to be absolutely confident that it meets your specifications and regulatory requirements. That’s why we have first-class material control. We rigorously verify all incoming shipments and provide you with a complete physical analysis. This is the only way to ensure that you get the quality and performance you need. Let’s take a closer look at how CNC machining works, including what CNC programming is and how to use a CNC machine. CNC machining is commonly used to produce machined parts from a variety of metals and plastics. Materials that can be processed at Elimold include:
- Aluminum
- Brass
- Titanium
- Stainless steel
- Regular steel
- ABS
- Polyoxymethylene
- HDPE
- LDPE
- PEEK
The above materials are just a few of the materials we can process. If the material you want is not listed above, you can contact Elimold’s engineers to work with you in detail on the design of the part you need to be custom machined.
CNC Programming
Geometry code, or G-code, is the programming language for CNC machines. The control computer on a CNC machine reads the G-code file line by line and then commands the rotary cutting tool to perform the motion, a significant upgrade from traditional milling machines, which are manual and require an operator to manually control the motion. Currently, Elimold’s CNC machining team uses three methods to program CNC machines:
- For very simple operations, G-code programs can be manually entered through the control computer’s MDI (manual data input).
- For more complex designs, CAM (computer-aided manufacturing) software can be used to import 2D or 3D models to generate G-code files, which are then loaded into the CNC controller.
- Complex designs can also be imported as 3D models of machined parts on CAD (computer-aided design) software. CAM software is used to specify the cutting operations to generate G-code files, which are then loaded into the CNC controller.
These front-end automation features make CNC machining fast and precise, producing high-quality parts in less than a day.
CNC Milling Machines
A CNC milling machine is a special type of CNC machining machine; if you want to learn more about CNC milling, check out our in-depth guide. Computer control produces high-quality, custom parts or products with precise surface finishes. It is favored in many industries due to its accuracy, consistency, and ability to increase production and uniformity. The milling process begins with a CAD drawing (computer-aided design), which is used to control the output of a CNC milling machine.
CNC Lathes
A computer numerically controlled lathe is a machine that turns material around a central spindle and a fixed cutting tool. The movement of the material is determined by coded instructions input through a computer, rather than manual operation. Multiple steps can be programmed at once, so your material does not have to leave the lathe between manufacturing, ensuring the correct position of the cut.
Multi-axis CNC Machines
Multi-axis CNC machines control the movement of multiple axes through the CNC system to achieve efficient and high-precision machining of complex parts. Its machining efficiency and accuracy depend on structural characteristics, control systems, tool selection, and cutting parameter optimization, etc. Operators need to have a high level of skills and in-depth understanding of machine tools, and pay close attention to the status and operation of machine tools. Multi-axis CNC machine tools have significant advantages in processing complex surfaces, special-shaped structures and parts with high quality requirements. Multi-axis CNC machine tools are widely used in the fields of automobiles, aerospace, mold manufacturing, etc., and will continue to play an important role in the future.
CNC Surface Treatment and Coating
Surface finishing can enhance the appearance and performance of parts, especially for parts that need to be used in harsh environments. Therefore, once the machined parts are formed, Elimold can also perform secondary surface treatments on the parts, such as:
- 320 paper removes tool marks left by the CNC machining process
- 400 paper is a smoother alternative to 320 paper
- 600 paper for a smooth surface
- 1500 paper for an optically smooth surface
- Light sandblasting for a smooth, even sheen
- Heavy sandblasting for a light, textured look
- Anodizing for a protective and beautiful coating
- Powder coating for a more durable, corrosion-resistant coating
- Chrome plating for a mirror-like surface
Benefits and Limitations of CNC Machining at Elimold
Like any digital manufacturing program, CNC machining has its own benefits and limitations. When speaking with clients who are considering using CNC machining services over 3D printing or injection molding, there are some key factors we discuss with them. CNC machining can be used at any stage of the product development lifecycle, but some post-processing is required. It can handle both simple and complex designs. Complex designs will cost more. The cost (cost per part) of CNC machining can also be high for low-volume production, as a large portion of your costs are made up of setup and programming fees. If full automation is required, you will need a well-trained operator with extensive programming knowledge, which can increase the overall cost. However, as you work your way toward larger volume production, this cost levels off and CNC machining becomes a very cost-effective solution. CNC machining is suitable for a wide range of materials, but keep in mind that there is often significant material waste.
So how do you know if CNC machining is right for you? Hiring an experienced rapid manufacturing partner like Elimold, Inc. (with a team of engineers with extensive CNC machining experience) will help you make the right decision for your project. If you have a rapid project that you need help with, submit your project to Elimold and our team will be happy to provide expert advice. Whether your part is simple or complex, we can handle most projects in 10 days or less.
About Elimold
Elimold was founded in 2012 as an innovator in on-demand digital manufacturing and continues to lead advancements in rapid prototyping and CNC machining. We know how to deliver high-quality products on time and on budget. Elimold has a team of CNC machining experts and takes a best-of-breed approach to everything we do. Tens of thousands of product developers and engineers around the world trust Elimold to bring their products to life. Have questions? Contact our friendly team of engineers.
Elimold CNC machining future development trend
Intelligence: With the advancement of Industry 4.0, CNC precision machining is developing towards intelligence. By introducing the Internet of Things and artificial intelligence technologies, CNC machine tools will achieve autonomous decision-making and optimization, and improve machining efficiency and quality.
Multi-axis: Future CNC machine tools will develop in the direction of multi-axis. Multi-axis linkage technology can achieve more complex parts processing, improve processing flexibility and efficiency, and adapt to more diverse production needs.
Green manufacturing: With the enhancement of environmental awareness, CNC precision machining is also developing in the direction of green manufacturing. By optimizing processing technology and using environmentally friendly materials, reducing energy consumption and waste emissions, and achieving sustainable development.