Some operating skills for CNC lathe processing

As we all know, most precision parts and automotive parts are produced with the help of CNC lathes , and there are many things to pay attention to during the CNC lathe processing process. Today I will introduce some operating skills to you.

Program writing skills for CNC lathe processing

Most powerful companies have high requirements for the accuracy of processing parts, so the following points should be considered when processing and programming on CNC lathes:

1. Part processing order:

Drill first and then flat (that is, avoid shrinking the material when drilling);

First perform rough processing, and then fine processing (to ensure the precision of the parts);

First, perform large processing, and finally perform small processing (to ensure that the surface of the small tolerance specification table will not be scratched and avoid parts deformation).

2. Determine the appropriate speed, cutting speed and cutting depth according to the material hardness:

Carbon steel materials are made of high-speed and high-speed cutting and have a large cutting depth. For example: 1Gr11, use S1600, F0.2, cut depth 2 mm;

The mold steel is selected for low-speed cutting and low-speed cutting, and the cutting depth is small. For example: GH4033, select the cut-out depth of S800, F0.08, 0.5 mm;

Titanium metal materials are selected for low-speed cutting, high cutting speed and small cutting depth. If it is Ti6, S400, F0.2 can be used, and the cutting depth is 0.3 mm. Take the processing of a part for example. The material is K414, which is a special hard material. After multiple tests, it was finally determined that S360, F0.1, and the cutting depth was 0.2, before qualified parts were processed.

About the tooling skills of CNC lathe processing

CNC lathe processing tool alignment includes tool alignment instrument and direct tool alignment.

First, set the center of the right end face of the part as the tool alignment point, and set it as the tool alignment point. Each CNC blade that must be used is used to adjust the tool alignment point with the center of the right end face of the part as the tool alignment point; enter Z0 in contact with the right end face of the CNC blade Click to measure, the measured value will be automatically recorded in the tool's tool complement value, representing the Z-axis tool setting and X-axis tooling to test cut. Use the tool to reduce the outer circle and measure the outer circle of the vehicle (such as x is 20 mm ) Enter x20, and the tool complement value will automatically record the measured value. At this time, the x-axis tool alignment method will not change the tool alignment value after the call is restarted. It can be used to produce the same parts for a long time. When mass production is performed, turn off the lathe without re-fitting the tool.

Debugging skills about CNC lathe processing

The parts were prepared, the blade was simulated and processed, and the blade was cut. In order to prevent problems in the program, the blade was cut, the blade was simulated and processed, and the blade was forward cutting test. The blade was subjected to forward cutting test, the blade was subjected to simulate processing, the blade was subjected to forward cutting test, the blade was subjected to forward cutting test, the blade was subjected to forward cutting test, and the blade was subjected to forward cutting In the test, the blade was subjected to forward cutting test, the blade was subjected to simulate processing, the blade was subjected to forward cutting test, and the blade was subjected to forward cutting test.

About the completion of parts processing

After the first sample tool radius compensation is successful, the parts can be mass-produced, but the first sample meeting does not necessarily mean that the entire part meets the standards, because during the processing process, the difference in processing materials will cause damage to the CNC blade, the processing materials will be soft, and the tool will be The damage will be small, the processing materials will be hard, and the tool will be damaged quickly. Therefore, during the processing process, you must conduct frequent inspections, add and reduce the knife in time to ensure that the parts meet the standards.

Take a part for example. The processing material is K414 and the total processing length is 180 mm. Due to the particularity of the material, the CNC blade is damaged very quickly during the processing process. From the beginning to the end, the damage of the CNC blade will definitely cause 10. —The slightness of 20 mm, so the slightness of 10-20 mm should be artificially increased in the program to ensure that the parts are qualified.

The operation technology of CNC lathe processing is a process from shallow to deep, and cannot be achieved overnight. Based on mastering the basic operation knowledge, basic precision machining knowledge and basic programming knowledge of CNC lathes. The processing and operation skills of CNC lathes are not static. They require the operator to fully utilize their imagination and hands-on ability, and are creative labor.