According to the analysis of factors that affect the quality of laser cutting, select the thermoformed parts with a thickness of 1.0～3.0mm for laser cutting test, and select the cutting block, cutting hole or cutting edge for analysis. The test procedure is as follows.

1. Test the focus position and adjust according to the deviation of the focus. The focus position is gradually adjusted from 3mm to 3mm, with an increase of 0.5mm each time. Compare the cutting quality after recording. The focus position with the best cutting quality was retained in the next test.

2. Adjust the power of laser cutting. In the first step, the power test is performed at the focus position with the best cutting state. The power starts at 1000 W and cuts every 300 W. Record and compare cut quality.

3. Change the cutting gas pressure. The focus and power state with the best cutting quality in the second step were tested. The air pressure starts from 7Pa, and the cutting quality is compared every time 1Pa is added. Keep the laser cutting gas pressure value with the best cutting quality for the next test.

4. Increase the cutting speed. The focus, power state and cutting gas pressure value of the best cutting quality in the third step were tested. The cutting speed starts at 6000 mm/min and increases by 1000 mm/min. Record and compare cut quality.

5. Setting of nozzle distance. The focus, power state, cutting gas pressure value and cutting speed with the best cutting quality in step 4 were tested. The nozzle distance starts from 0.6mm and increases by 0.2mm each time until the nozzle distance is adjusted to 1.2mm. Record and compare the cutting status each time, and finally get the nozzle distance value of the best cutting quality.

Selection case 1: 2 mm thickness material, adjustment of focus position -3 mm, nitrogen cutting pressure 12 Pa, nozzle distance 1 mm, cutting power 3000 W, cutting speed 12 m/min, because various parameters are adjusted well and cutting conditions are good , Through various tests, the cutting surface is smooth when the parameters are adjusted to the most suitable condition.

Five, conclusion

According to the motion form and motion characteristics, the motion model of the machine tool motion axis can be established through motion configuration. At the same time, ensure the relative position of each model, and use OIV to read the WRL file function interface to realize the rapid construction of virtual processing scenarios. Combined with the characteristics of laser cutting technology, the model making is analyzed, which can effectively guarantee the quality of product processing, and laser technology has a broader application market.

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