ntroduction to the Principles to be followed in the Processing of Precision Casting Castings

In order to ensure the quality of precision parts during the processing of precision castings, four principles need to be followed. Today, Zhuzhou Kaifeng Precision Casting Factory will introduce in detail what these four principles are.

1、 Datum first: that is, machining the reference plane first. During the machining process of the part, the surface that serves as the positioning reference should be machined first to provide a precise reference for subsequent processing as soon as possible.

2、 Dividing processing stages: For surfaces with high quality requirements in mechanical processing, they are generally divided into three stages: rough machining, semi precision machining, and precision machining. Mainly to ensure processing quality; Beneficial for scientific application of equipment; Facilitate the arrangement of heat treatment processes; And facilitate the timely detection of rough defects, etc.

3、 Face first, then hole: For parts such as the box, bracket, and connecting rod, the plane should be machined first and then the hole should be machined. This allows for the machining of holes based on plane positioning, ensuring the accuracy of the plane and hole positions, and bringing convenience to the machining of holes on the plane.

Finishing processing: The main surface finishing processing, such as grinding, honing, precision grinding, rolling processing, etc., should be placed at the end of the process route stage. The general principles for formulating the processing process route of precision parts and the formulation of the processing process regulations for precision casting castings can be roughly divided into two stages. Firstly, the process route for parts processing is formulated, and then the process dimensions, equipment and process equipment used, as well as cutting specifications and working hours for each process are determined.