MANUFACTURE OF WELDED CAN BODY

摘要: PURPOSE:To remove coating film only from the surface of lapped edge and to minimize area exposed iron in resistance welding a blank tin free steel by bending along boundary line removing chromium film. CONSTITUTION:The 17 16 is bent two steps form step 18. It then so formed that upper face 17a1 right side 17a figure which become part positioned nearly parallel 16a slightly higher than face, lower 17a2 left 16b face. The chrominum 5 on faces 17a1, removed rotary tool 9 having horizontal axial while carrying direction arrow, an 10 formed. In this case, even if shaking rotation occurs 9, proceeding 18 or inside thereof crossing 21 between parts 17a, does not take place.