The influence law of fiber laser cutting machine process parameter change on cutting quality
The influence of the power of the fiber laser cutting machine on the cutting quality is obtained by keeping other process parameters unchanged and continuously changing the power of the fiber laser cutting machine to obtain the influence of the laser power change on the cutting quality. The power of the fiber laser cutting machine starts from 1000W and increases by 200W each time until the power is 2000W.
From the data in Table 1, it can be seen that under the condition that other process parameters remain unchanged, it is almost impossible to cut when the power is 1000W; but with the continuous increase of power, the cutting effect becomes better. The effect of roughness and overburning is better when it reaches 1600W; the effect of slagging degree is better when the power is increased to 1800W. As the power increased to 2000W, the effects began to deteriorate. Therefore, when the cutting power is 1600W, the effect is better, and the power will be set at 1600W in future research.
The influence of the cutting speed of the fiber laser cutting machine on the cutting quality
In this process research, the cutting speed is obtained by keeping other process parameters unchanged and continuously changing the cutting speed of the fiber laser cutting machine. The effect of speed changes on cutting quality. The cutting speed starts from 0.4m/min and increases by 0.1m/min each time until the speed is 0.9m/min.
It can be seen from the data that under the condition that other process parameters remain unchanged, when the cutting speed is 0.4m/min, the cutting effect is poor; but as the speed continues to increase, the cutting effect becomes better. When the speed reaches 0.6m/min, the effect of roughness and slagging degree is better; when the speed reaches 0.7m/min, the effect of overburning is better. However, as the speed continues to increase, the various effects become worse. When the speed is increased to 0.9m/min, the speed is too fast and the cutting is not penetrated, which makes it impossible to cut. Therefore, the cutting effect is better when the cutting speed is 0.6m/min, and the speed will be set to 0.6m/min in the future cutting research.
The influence of the auxiliary gas oxygen pressure on the cutting quality
In this process research, by keeping other process parameters unchanged and continuously changing the oxygen pressure, the effect of the oxygen pressure change on the cutting quality is obtained. Influencing the results, the oxygen pressure starts from 0.3kg and increases by 0.1kg each time until the oxygen pressure is 0.8m/min.
Under the condition that other process parameters remain unchanged, the cutting effect of fiber laser cutting machine is poor when the cutting speed is 0.3kg; but with the continuous increase of air pressure, the cutting effect becomes better, when the air pressure reaches 0.6 When the weight is kg, the various effects are better; with the continuous increase of speed, the effect of roughness becomes worse, the effect of slagging degree becomes worse, and the effect of overburning becomes worse. In future studies, the oxygen pressure will be set at 0.6 kg. The influence of focus position adjustment on cutting quality. In this process research, by keeping other process parameters unchanged, and continuously changing the focus, the result of the influence of focus position change on cutting quality is obtained. The focus position starts from +1mm and increases by 0.5mm each time. , Until the focus position is +3.5mm. When the focus position is +1mm, the airflow cannot pass through the cross section of the sheet due to the narrow slit, so the effect of the degree of slagging is very poor; as the focus position increases, the slit gradually widens , The effect of slagging degree is also improved; when the focus position is +2.5mm, the roughness and overburning effect is better; but with the continuous improvement of the focus position, they gradually become worse. From this we conclude that the better cutting focus position should be +2.5mm.