Relationships between output power of laser diode and optical feedback coefficient, optical feedback coefficient and defocusingamount are numerically investigated.
And it is observed that laser power is the ultimate affection of joint strength, the defocusingamount is the weak influence, and the welding speed between the former affection factor.
进一步分析发现激光功率对接头强度的影响最大，焊接速度的影响仅次于激光功率，离焦量的影响最小。
3
The effects of the laser power, defocusingamount and the scanning velocity tO the cleaning results are got by experiments; the cleaning threshold and the damage threshold are obtained.