The entire process of CNC machining

With the increasing development of industry, CNC machining is widely used in various industries as the mainstream form of machining. Especially in the fields of aerospace, medical equipment, electronic digital, automotive modification accessories, high-end audio equipment, etc.

Cnc Precision Machining

So, do you know what steps and processes CNC machining must go through in order to deliver high-quality finished products to customers in a timely manner?

Today's article editor will give you a rough understanding of the CNC machining process!

1. Analyze customer drawings and determine processing technology

Business personnel obtain first-hand drawings provided by customers, briefly list customer requirements, and submit orders to the engineering department. Engineering personnel will determine factors such as machine tool, cutting tool, positioning and clamping device, process, processing sequence, and cutting amount based on the material selection, surface treatment, shape, size, accuracy, surface roughness, and other requirements of the parts in the drawings, combined with the command functions of the CNC machine tool used. They will fully utilize the advantages and efficiency of the machine tool and strive to achieve a balance in various aspects such as reasonable processing path, fewer visits, and shorter processing time.

2. Reasonably calculate the coordinate values of the tool path trajectory
Based on the geometric dimensions of the processed parts and the established programming coordinate system, the motion trajectory of the tool path center can be calculated using fixed software, and all tool position data can be obtained. Usually, CNC systems have functions such as linear interpolation and circular interpolation. For simple planar parts with a relatively simple shape, only the coordinate values of the starting and ending points of geometric elements need to be calculated.

For parts with complex shapes (composed of non circular curves or surfaces), it is necessary to approach the actual curve or surface with straight segments and calculate the coordinate values of nodes based on the required accuracy.

3. Write CNC machining programs for parts
Based on the path of the part, calculate the tool motion trajectory data and the determined process parameters and auxiliary work. Programmers can write the machining program of the part segment by segment according to the functional instructions and program segment format specified by the CNC system.

In this step, attention should be paid to the standardization of program writing, which should be easy to express and communicate; At the same time, one should also be deeply familiar with the performance, instructions, skills, etc. of the CNC machine tool used

4. Enter the stage of machine tool clamping and tool clamping

(You can also place this step before the previous step) Before performing CNC machining, the workpiece needs to be clamped onto the machine tool. It is necessary to consider factors such as the function and function that the final product of the workpiece is suitable for, as well as the color of the shape, size, and surface treatment, in order to choose the appropriate tool and specification, and the correct installation method. This step is a very important step, not only cannot be omitted, but also needs to be carefully checked and adjusted in a timely manner;

5. Processing inspection and repair
This step occurs after completing CNC machining and requires inspection and repair of the machined parts. Inspection can be carried out through measurement and equipment to inspect factors such as size, shape, surface color, etc., in order to meet quality requirements. If the above elements do not meet the target requirements, it is necessary to carry out processes such as trimming, grinding, and polishing to reduce the rework rate of the finished product;
After the above explanation by the editor, you should have a general understanding of the basic process of CNC machining, which includes designing and developing machining processes, writing machining programs, machine tool and tool clamping, machining operations, quality inspection, and other one-stop turnkey processes. Each of these steps requires precise operation and rigorous parameter control, in order to ensure high efficiency and finished product quality during the processing.