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Why does Precision CNC Machined Parts Deteriorate?

Feb. 03, 2020

The accuracy of Precision CNC Machined Parts almost determines the quality of the product. The more precise the hardware parts, the higher the accuracy requirements. So why will the precision of precision hardware parts become worse? Here is the answer from Precision Machined Components Manufacturers:

The first factor is the poor machining accuracy of the part itself. Generally speaking, if the dynamic error between the shafts is not adjusted during installation, or because the shaft transmission chain changes due to wear, it will affect the accuracy of the part. Generally, this type of error caused by the accuracy of the inspection can be adjusted by adjusting the compensation amount. If the error is too large or if an alarm occurs, it is necessary to check the servo motor to see if its speed is too high.

Precision CNC Machined Parts

Precision CNC Machined Parts

The second factor is that the overshoot of the machine tool during operation will also affect the machining accuracy. It may be because the acceleration and deceleration time is too short and the change time is prolonged. Of course, it is also very likely that the screw and the servo motor are loosened.

The third factor is that the roundness caused by the linkage of the two axes is too poor, the axis is not adjusted to form a circular axial deformation, the shaft screw clearance compensation is incorrect, or the shaft positioning is offset, which may affect the accuracy of precision parts. 

The precision machining industry has always been a labor-intensive, capital-intensive and technology-intensive industry, with high industry barriers. The procedures of precision parts processing have extremely strict requirements. A little carelessness during processing will cause the workpiece error to exceed the tolerance range, and it will be necessary to reprocess or announce a scrap of the blank, which greatly increases the production cost.

First of all, the requirements in terms of dimensions, we must strictly follow the form and position tolerance requirements of the drawings for processing. Although the components processed and produced by the enterprise will not be exactly the same as the dimensions of the drawing, the actual dimensions are within the tolerance range of the theoretical dimensions, which are all qualified products and can be used parts.

Secondly, for equipment requirements, roughing and finishing should be performed using equipment with different properties. Because the roughing process cuts most parts of the blank, the workpiece will generate a large amount of internal stress when the feed is large and the cutting depth is large. At this time, finishing cannot be performed. When the workpiece is finished in a certain period of time, it should work on a higher-precision machine so that the workpiece can achieve high accuracy.

Once again, the processing of precision parts often has surface treatment and heat treatment processes. Surface treatment should be placed after precision machining. And in the precision machining process, the thickness of the thin layer after surface treatment should be considered. We also have Plastic Injection Mold Oem on sale, welcome to consult.