In the field of the mechanical processing industry, precision CNC machining is actually numerical control processing. First of all, the engineer will program the drawings to be processed into the program. Then, connect the computer to the CNC machine tool. The supplier commands the CNC machine tool to operate through programming. And then complete precision parts processing. Precision CNC processing is mainly suitable for small batch and large batch processing of various spare parts. The precision of CNC machining parts is very high. Therefore, it serves precision parts processing in different industries. Next, let’s take a look at the machining process of precision CNC parts.

CNC aluminum parts

Before processing CNC spare parts, the supplier must clearly see the content of the process flow. Besides, we need to know the machine part, the shape, and the size on the drawing. Of course, the processing content of the next process must also be clear.


Before clamping and processing raw materials, first make a measurement. See whether the size of the blank meets the requirements of the drawing. Must carefully check whether its placement is consistent with the programmed instructions.


After finishing the rough machining process, the engineer should conduct a self-check to adjust the data with errors in time. The main content of the self-check is the position and size of the CNC machine spare parts.


  1. Features of CNC precision machining

1.1 High degree of automation

CNC precision machining with a high degree of automation has many advantages. For example, it can greatly reduce the manual labor intensity of the operators. So the benefits of CNC lathe processing are continuously improved. In the CNC machining process, you only need to press the input program. Then, it completes the automatic machining. The operator only needs to set the tool, load and unload the workpiece, and change the tool. In modern CNC precision machining, the operator mainly observes. And monitors the operation of the lathe. However, the high technical content of CNC lathe processing has certain requirements. They are mainly on the culture and skills of first-line producers. Therefore, the operator needs systematic training to be able to operate alone.


1.2 High precision and quality

The products processed by CNC precision machining have high precision and stable quality. So they are widely welcomed by the market. The positioning accuracy and repeat positioning accuracy of CNC lathe processing is very high. So there is no need to worry about the consistency of the size of a batch of parts. We only need to ensure the accuracy of CNC spare parts processing design and procedures, and carefully operate the CNC lathe. In this way, CNC spare parts suppliers can guarantee higher processing accuracy. Then CNC spare parts suppliers perform high quality control. And the thousands of high-volume precision parts processed are all standardized.

1.3 Easy to process complex parts

The upgrading of any product is accelerating. And CNC precision machining is conducive to the development and modification of new products. CNC lathe processing generally does not require a wide variety of complex equipment. Through programming, CNC spare parts suppliers can process non-standard mechanical parts. They always have complex shapes and high precision requirements. When the demand side requires product modification and design changes, we only need to modify the program. Without redesigning, it saves many energy and costs. Therefore, CNC precision machining can greatly shorten the product development cycle. This also provides a shortcut for the research and development, improvement and modification of smart products.

CNC aluminum parts
  1. CNC precision machining processes

According to the features of CNC precision machining, you can divide the processes according to the following methods:

2.1 One installation

Take one-time installation and processing as one process. This method is suitable for CNC machine spare parts with less processing content. After processing, you can inspect it.

2.2 Processing content

Divide the processes according to the processing content of the same tool. Suppliers can complete the surface of some precision CNC machine parts in one installation. However, the program may be too long. The amount of memory and the continuous working time of the machine tool will limit it. For example, suppliers can’t complete a process within a working period, and so on. Besides, the program is too long will increase the difficulty of error and retrieval. Therefore, in CNC precision machining, the programmed program cannot be too long and the content of each process cannot be too much.

2.3 Processing parts

The processing part is divided into processes. Some workpieces need to be processed with a lot of content. We can divide the processing part into several parts. The division basis is its structural characteristics, such as cavity, shape, curved surface or plane. And treat each part of the processing as a process.

2.4 Rough or precision machining

Divide processes by roughing and finishing. There are some precision CNC machine parts made of materials that are easily deformed during processing. It is necessary to correct the deformation that may occur after rough machining. Generally speaking, we must separate every process of roughing and finishing. Besides, consider the arrangement of the sequence according to the structure and blank of the part, as well as the needs of positioning, installation and clamping. The sequence arrangement should generally be carried out according to the following principles.

custom CNC aluminum

(1) The previous process’s processing cannot affect the positioning and clamping of the next process. Interspersed with general machine tool processing procedures should also be considered comprehensively.


(2) Process the inner cavity first and then the shape.


(3) It is best to process continuously with the same positioning, clamping method or processing with the same tool. This can reduce the number of tool changes for heavy positioning.


(4) At the same time, follow the arrangement principle of cutting order of precision parts. Elaborate first, then master, master and then second, face first, hole first, benchmark first.


  1. Matters needing attention in precision machining


In the field of the mechanical processing industry, what is the processing of mechanical parts? There is a wide variety of mechanical equipment. Such as lathe, milling machine, grinder, wire cutting, and CNC machining center. Also, the processing accuracy of each piece of equipment is different. Therefore, achieving precision machining depends on the precision of the mechanical parts. According to this, the corresponding processing route and equipment are selected.


High quality comes from superb technology. The third is the skill of the operator. This involves the operating skills of various equipment operators. These skills include an in-depth understanding of equipment, mechanical parts processing, and processed parts materials. Operators can gradually accumulate these skills in ordinary work. The key to the skills of the operators is practice, and they should also understand the theory.


Machining refers to the process of changing the shape or performance of a workpiece through a mechanical device. According to the difference in processing methods, we can divide it into rough machining and finishing. The finishing process is more complicated. And the requirements for processing machine tools and technicians are relatively high. After thermal processing of special materials, perform precision grinding, and keep the machining allowance accurate. Leave more or less will affect the quality of parts processing!

custom CNC aluminum