xiehe model

The machining accuracy of parts needs to be subdivided. Let's talk about the difference between different machining equipment and the dimensional accuracy of the equipment.

1) CNC milling accuracy

The CNC machining center can process various parts such as electronic product shells, heat sinks, special-shaped parts, and curved workpieces. According to the machining direction, it can be divided into down milling and down milling. The machining accuracy is generally up to IT8~IT7, the dimensional accuracy is 0.01-0.02, and the surface finish is generally Ra6.3~1.6.

2) Lathe accuracy

In CNC lathe machining, the tool rotates, and the tool moves in a straight line or a curve in the plane. Generally, it is carried out on a CNC lathe to process the inner and outer circular surfaces, cylindrical surfaces, end surfaces, conical surfaces, curved surfaces, blind holes, and internal threads of the workpiece. The machining accuracy of the lathe is IT8-IT7, the dimensional accuracy of the lathe is 0.01, and the surface finish is Ra1.6-0.8.

3) Wire cutting machining accuracy

Wire cutting machine is divided into three types: fast wire cutting, middle wire cutting and slow wire cutting. The following are the differences in accuracy of three different wire EDMs:

Fast line: 0.02mm precision, Ra6.3 surface finish.

Middle silk: The surface finish can reach Ra0.8-1.6.

Slow wire walking: The precision is 0.002mm, and the finish of the processing surface can reach Ra0.2.

4) Grinding accuracy

Grinding refers to the machining method that removes excess material on the surface of parts by grinding to achieve a higher surface finish.

Grinding machine processing is divided into cylindrical grinding, internal grinding and surface grinding, etc. As long as the accuracy of the measuring tool is achieved, the machining accuracy of the cylindrical grinding machine can reach 0.001mm, and the roughness can reach Ra0.40.