Several methods for improving CNC machining quality in precision casting factories

Several methods for improving CNC machining quality in precision casting factories

In order to improve the quality of CNC machining parts, it is necessary to identify the main factors that cause machining errors. This is crucial, and corresponding measures are needed to reduce or control the occurrence of these factors. Next, we will introduce 5 methods to improve the machining quality of mechanical parts:

1、 Error grouping method: This method divides the working dimensions of rough or previous processing into n groups based on the measurement of error size; Afterwards, adjust the position of the tool relative to the workpiece according to the error range of each group, which can make the center of the size dispersion range of each group of workpieces basically consistent, and greatly reduce the size dispersion range of the entire batch of workpieces.

2、 Error compensation method: This method is mainly aimed at creating a new type of original error, supporting and offsetting the inherent original error in the original process system, thereby achieving the goal of reducing machining errors and machining accuracy.

3、 Error transfer method: This method essentially transfers the geometric errors, stress deformation, and thermal deformation of the process system to a direction that does not affect the machining accuracy. For example, for multi station processes with indexing or indexing, or processes that use indexing tool holders for machining, the indexing and conversion errors of the entrepreneurs will directly affect the machining accuracy of the relevant surfaces of the parts.

4、 Error equalization method: This method utilizes closely related surfaces to mutually correct each other, or uses each other as a benchmark for processing. It can evenly affect the entire machining surface with larger local errors, making the machining errors transmitted to the workpiece surface more uniform, thus greatly improving the machining accuracy of the workpiece.

Precision machining