xiehe model

1. In order to ensure the accuracy of CNC machining, it is best to separate CNC rough machining and CNC finishing:

During CNC rough machining, the cutting amount is large, the cutting force and clamping force on the workpiece are large, the heat generation is large, and the machined surface has obvious work hardening phenomenon, so there is a large internal stress inside the workpiece. If roughing continues, the precision of the finished part will be quickly lost due to stress redistribution. For some parts with high machining accuracy. After rough machining and before finishing machining, low temperature annealing or aging treatment should be arranged to eliminate internal stress.

2. Reasonable selection of equipment:

CNC rough machining is mainly to cut off most of the machining allowance, and the requirements for CNC machining accuracy are not high. Therefore, rough machining should be carried out on high-power, low-precision machine tools, while the finishing process requires high-precision machine tools. Rough machining and finishing are carried out on different machine tools, which can not only give full play to the capabilities of the equipment, but also prolong the service life of precision machine tools.

3. In the cnc processing process route of precision mechanical parts, the heat treatment process is often arranged:

The location of the heat treatment process is arranged as follows: In order to improve the machinability of the metal, such as annealing, normalizing, quenching and tempering, etc. Usually arranged before processing. In order to eliminate internal stress, such as aging treatment and quenching and tempering treatment, it is generally arranged after rough machining and before finishing. In order to improve the mechanical properties of parts, such as carburizing, quenching and tempering, generally arranged after processing. If the deformation is large after heat treatment, the final processing procedure must be arranged.

1. The operation is simple, reducing walking back and forth, avoiding unnecessary bending and tiptoe movements.

2. The positioning is accurate and reliable, preventing wrong operation caused by slight vibration.

3. The movement direction of the operating parts and the operated parts of the machine tool and equipment should comply with the regulations and be marked with simple symbols.

4. The structure and arrangement of handles, handwheels and buttons should meet the requirements. The start button should be mounted in the housing or equipped with a grommet to prevent accidental touch. The handwheel and handle installed on the shaft will hurt people with the rotation of the shaft during automatic feeding, so an automatic release device should be installed.