The importance of CNC precision machining maintenance and cutting amount selection

For high-efficiency CNC lathe machining of metal cutting, the material to be processed and the cutting conditions of the cutting tool are the three major elements. These determine machining time, tool life and machining quality. An economical and effective machining method must be a reasonable choice of cutting conditions.

The three elements of CNC lathe machining cutting conditions: cutting speed, feed and depth of cut directly cause tool damage. With the increase of cutting speed, the temperature of the tool tip will rise, which will cause mechanical, chemical and thermal wear. When the cutting speed is increased by 20%, the tool life will be reduced by 1/2.

The relationship between the feed condition and the back wear of the tool occurs in a very small range. But the feed rate is large, the cutting temperature rises, and the back wear is large. It has less effect on the tool than cutting speed. Although the effect of the depth of cut on the tool is not as large as the cutting speed and feed, when cutting with a small depth of cut, the material to be cut will produce a hardened layer, which will also affect the life of the tool.

The user should select the cutting speed according to the material to be processed, hardness, cutting state, material type, feed rate, depth of cut, etc.

The selection of suitable processing conditions for Z is based on these factors. Regular, steady wear to life is the ideal condition.

However, in actual operation, the choice of tool life is related to tool wear, machining dimensional changes, surface quality, cutting noise, machining heat and so on. When determining the processing conditions, it is necessary to study according to the actual situation. For difficult-to-machine materials such as stainless steel and heat-resistant alloys, coolants or rigid cutting edges can be used.

CNC precision machining has a very wide range of applications, and it is also a kind of equipment often used in the field of precision machining. Whether it is before use, during the process or after use, the corresponding maintenance items cannot be ignored. Now I will share with you the maintenance knowledge about CNC precision machining.

1. Before the precision machining operation, wear all labor protection equipment, carry out lubrication and maintenance as required, and check the oil level of each lubricating oil.

2. When clamping the workpiece, it should be handled lightly to prevent bumps and damage to the worktable; when the workpiece with the center L is heavy, the machine worktable should also be checked The bearing capacity of precision machining is not allowed to overload.

3. The machining program should be checked first before it can be run. When using the high-speed function of precision machining, it is necessary to confirm the matching of the tool. 4. After the precision machining machine tool is started, check whether the movement of the spindle and the worktable in all directions is normal, and whether there is abnormal noise.

4. During the processing, always pay attention to whether the movement of the machine tool and the processing state are normal or not. When there is noise and alarm, it should be stopped immediately for inspection and processing, and the processing can be continued after the troubleshooting of precision machining.

Good maintenance habits and periodic inspections can not only increase the service life of the machine tool, but also keep it in good machining accuracy. Therefore, we The machine tool will be maintained and maintained on a periodic basis, and it will be calm when processing high-precision parts.