Problems that need attention in CNC precision machining

Problems that need attention in CNC precision machining processing

There are many procedures and precision in machining; therefore, there are many problems in processing that need our attention, but it is very important that we operate personnel There are three points to pay attention to, and the editor will report to you below:

Problems that need attention in machining process

1. In order to ensure the machining accuracy, roughing and finishing are very well separated. :

Because the rough machining, the cutting amount is large, the workpiece is subjected to large cutting force and clamping force, and the amount of heat is large, and the machined surface has obvious signs of machining toughness, and there is a large amount of machining in the workpiece. If the roughing is carried out continuously, the precision of the finished part will be lost very quickly due to the redistribution of the stress. For some parts that require high machining accuracy. After roughing and before finishing, a low-temperature annealing or aging treatment process should also be placed to relieve internal stress.

2. Reasonable selection of equipment:

The main thing for rough machining is to cut off a large machining allowance, and high machining accuracy is not required. Therefore, rough machining should be performed at a higher power. Machine tools with large and not very high precision are long held, and the finishing process requires machining with higher precision machine tools. Roughing and finishing are processed on different machine tools, which can not only give full play to equipment capabilities, but also extend the service life of precision machine tools.

3. In the machining process, there is often a heat treatment process.

The placement of the heat treatment process is as follows: In order to improve the cutting performance of the metal, such as annealing, normalizing, quenching and tempering, etc., it is usually placed in the machining process. In order to eliminate internal stress, such as aging treatment, quenching and tempering treatment, etc., it is usually placed after rough machining, and the finishing process is carried out. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc., they are usually placed after machining. If there is a large deformation after heat treatment, the final processing process must be placed.

Second, safety precautions in CNC precision machining:

1. It is easy to operate and reduce back and forth to avoid unnecessary bowing and tiptoeing.

2. The positioning is accurate and reliable, preventing misoperation due to slight vibration.

3. The movement direction of the operating parts of the machine tool equipment and the movement direction of the manipulated parts should be in compliance with the regulations, and there should be a light symbol mark.

4. The layout and arrangement of handles, handwheels, and buttons must comply with regulations. The start button should be installed in the case or equipped with a protective ring to prevent accidental vibration. The handwheel and handle installed on the shaft will roll with the shaft to hurt people during automatic feeding, so an automatic escape device should be installed.