Important Tips For Machining

With the discovery of the times, many advanced mechanical teaching techniques have gradually emerged in mechanical processing. However, in the actual mechanical processing process, common problems such as low machining accuracy, mechanical vibration, and deformation of stressed parts are inevitable. These issues can affect the quality performance and productivity of machined products. So how can we reduce the occurrence of these problems? Shanghai Yixing Machining has compiled the following tips and principles for you, hoping they will be useful to you.

1. The coarse and fine machining should be separated to ensure accuracy

Due to the large amount of cutting during rough machining, the workpiece is subjected to significant cutting and clamping forces, resulting in increased heat generation. The machining surface will exhibit significant work hardening, and there will also be significant internal stresses within the workpiece. If rough machining is completed and precision machining is carried out immediately, the accuracy of the precision machined part will be affected by the redistribution of stress. For some workpieces with high precision machining, low-temperature annealing or aging treatment should be carried out after rough machining to eliminate internal stress, and then precision machining should be carried out.

2. Select machining equipment with corresponding accuracy

As we all know, the precision requirements for rough machining and precision machining are different, so the equipment chosen should also be different. Rough machining mainly involves cutting off large machining allowances, without the need for high machining accuracy. Therefore, rough machining can be selected on mechanical machining equipment with higher power and relatively lower accuracy. High precision machining equipment should be selected for precision machining. Distinguishing choices can not only fully utilize the capabilities of the equipment, but also extend the service life of the machine tool and improve the efficiency of mechanical processing.

3. Reasonable selection of mechanical processing technology

When planning machining processes, heat treatment is very important, and different machining processes should have different heat treatment arrangements. To improve the cutting performance of metals before mechanical processing, heat treatments such as annealing, normalizing, and quenching and tempering are required; After rough machining, heat treatment such as aging treatment and quenching and tempering treatment are required to eliminate internal stress; In order to improve the mechanical properties of the workpiece after mechanical processing, heat treatment such as carburization, quenching, and tempering are required.

4. Prevent slipping during mechanical processing

During the transmission of pulleys in mechanical processing, the pulleys often slip between the wheel and the axle. Use a 15-18mm grooving drill bit to create a series of grooves on the axle, which can form adsorption force to prevent slipping. Turning waste into treasure will be rewarded by the boss.

The Four Principles in Machining

1. Benchmark First

Before machining, determine a reference plane to provide a positioning reference for subsequent machining. After determining the reference plane, the reference plane must be machined first.

2. Divide processing stages

When machining products, different degrees of processing are required according to different product requirements, and the degree of processing needs to be divided. If the accuracy requirement is not high, then a simple rough machining stage is sufficient. The progress requirements of the product are becoming increasingly strict, and the subsequent stages of semi precision processing and precision processing will need to be carried out.

3. Face first, hole later

When machining, for workpieces such as brackets, the brake needs to perform both flat machining and mechanical hole machining. In order to reduce the accuracy error of the processed holes, machining the flat surface first and then the holes is beneficial to reduce the error.

4. Finishing processing

This processing principle roughly refers to some polishing and polishing processes, which are usually carried out after the entire product structure is completed.