The positioning principles of CNC machined parts 

For any product processing, CNC machining manufacturers ensure the final processing accuracy and smooth processing by laying a solid foundation in positioning and clamping. The CNC processing of small machining centers is no exception. 

The origin of the workpiece coordinate system should have an accurately defined geometric relationship with the reference point. 

We know that the processing of workpieces in Shenzhen CNC machining is different from traditional mechanical processing. It is achieved by executing the processing program of the workpiece. The origin of the workpiece coordinate system, also known as the program origin, does not necessarily have to coincide with the positioning datum of the workpiece, but a correct geometric relationship must be established between the two. Generally speaking, the selection of the origin of the workpiece coordinate system mainly considers the convenience of programming and measurement of the processing program. Only by determining the accurate geometric relationship can the correctness of the tool path in the program be ensured. 

Second, the design reference of the workpiece should be used as the positioning reference as much as possible. 

When choosing and designing the benchmark for CNC machining in Shenzhen, using the same benchmark for positioning as the design benchmark can not only avoid positioning errors caused by non-coincidence of benchmarks and ensure the final machining accuracy of the workpiece, but also greatly simplify the programming. Even when the positioning benchmark of the workpiece is difficult to coincide with the design benchmark, the assembly drawing should be carefully analyzed to determine the design function of the design benchmark of this part. Through the calculation of the dimensional chain, the shape and position tolerance range between the positioning benchmark and the design benchmark should be strictly specified to ensure the final machining accuracy of the workpiece to the greatest extent. 

Third, the selected reference should complete as much processing content as possible. 

The most significant feature of the CNC machining center in Shenzhen is that it can complete the majority of the processing content of the workpiece in one clamping. Especially to avoid the workpiece after fine processing being subjected to multiple non-essential size processing or multiple turnovers, causing deformation, bumps, scratches and other phenomena, the clamping of the workpiece should fully consider the selection of the positioning datum to complete as much processing content as possible in one go. 

Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in complex structural parts and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.