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The automotive industry is making continuous progress with the help of automation and robotics. Automobile production and design have greatly improved. CNC machining is the latest automation technology changing the automotive manufacturing process.

Ⅰ. What is CNC machining?

Computer Numerical Control (CNC) machining is a computer-controlled manufacturing process that produces precision parts using many different materials, from plastics to metals. To make a part, a CNC machine sends computerized instructions to a power tool like a lathe or a drill. And the tool turns a piece of material into a finished product according to the instructions.

CNC machining can be used in automobile production to manufacture engine parts, interior and headlight lighting, suspension parts, carburetor housings, exhaust parts, etc.

CNC machining is also called numerical control machining. Before programming, the process analysis of the workpiece should be carried out, the processing plan should be drawn up, the appropriate tool should be selected, and the cutting amount should be determined. In programming, it is necessary to deal with technical issues such as tool setting point and processing route. Therefore, technical analysis in programming is very important.

When processing parts on ordinary machine tools, the process program or process card is used to specify the operating procedures of each process, and the operator processes the parts according to the steps specified on the process card. When machining parts on a CNC machine tool, all the processes, process parameters and displacement data to be processed must be compiled into a program to control the machining of the machine tool.

The principle of CNC machining process is basically the same as that of ordinary machine tools, but the whole process of CNC machining is automatic, so it has its own characteristics:

1. The content of CNC processing technology is complex

This is because CNC machine tools are more expensive than ordinary machine tools. It is not economical to use it for simple processes. Therefore, more complex processes are usually arranged on CNC machine tools, even processes that are difficult to complete with ordinary machine tools.

2. The arrangement of CNC processing steps is more detailed

This is because problems that do not need to be considered in the processing technology of ordinary machine tools, such as the arrangement of process steps, the determination of tool setting points, tool changing points, and the determination of processing routes, cannot be generalized. It is ignored when programming the machining process of CNC machine tools.

3. Rely on procedures to complete all the technological processes.

4. The CNC machining program is a necessary document for the CNC machine tool.

5. CNC machine tools are controlled by program instructions, and the whole process of CNC machining is automatically carried out according to program instructions.

6. The CNC machining program includes not only the technological process of the parts, but also the necessary technological parameters to complete the process, such as cutting amount, feed route, tool size number, and machine movement process tools.

7. CNC machining has high efficiency, high machining precision, low labor intensity, and strong adaptability to different workpieces.

Ⅱ. Advantages of CNC machining in the automotive industry

There are many advantages to using CNC machining in the automotive industry, including:

1. CNC machining can increase production speed

Compared with traditional machining, the production time of CNC machining is shorter. Since it is an automated process, human factors such as fatigue cannot be overcome. Computer instructions can also be repeated as many times as necessary, so the process is best suited for rapid production of large numbers of parts.

2. Accuracy

Through the automated computerized process of CNC machining, the possibility of production errors is greatly reduced. The automotive industry requires precise tolerances, so a high level of precision is critical.

3. Repeatability

Since CNC machining operations can be repeated as many times as needed, it is especially useful for mass production of individual parts. And because batches of parts must be consistent, their repeatability is a big advantage in the automotive industry.

4. Simplify the process

CNC machines handle all production steps that streamline the process, so employees can focus on innovation and design.

5. Reduce costs

The high efficiency of CNC machining can save the company cost.