Abstract: The structure and the principle of the blade gap adjustment mechanism of TMEIC laser welder were analyzed, and the methods to improve the double shear’s cutting quality were studied. The results showed that the straightness of the cutting section and the blade gap adjustment were the key factors to improve the double shear’s cutting quality. The breakage rate of weld joint can be reduced by improving the shearing accuracy.

Key words: double shear, straightness of shear section, blade clearance, guide pin