| 摘要 |
PURPOSE:To make the welding intensity constant and equalize the pressing power of all electrodes against a work by connecting a pressure room of a cylinder structure part at the common fluid supply route and pressing a work acting fluid pressure in the pressure room. CONSTITUTION:All electrode sticks 14... on the above side are approached on the below side of electrode sticks 21... by falling a mounting part on the mobile side acting cylinders. Thereafter, falling a mounting part on the mobile side is stopped, converter valves 48, 44 are switched to close a fluid discharge route 42 and advance a piston 49 of an amplifier 37. Therefore, an electrode stick 14 is advanced at a small stroke by acting a water pressure P into a pressure room 34 of each mounting block 15 and the edge is contacted with a the above work W. Further, the said edge is pressed and welded on the condition that a work W is pressed between the below electrode stick 21. A water pressure P is acted constantly by the common fluid supply route 35 to each pressure room 34 and the above all electrode sticks 14... are advanced at the same time to make the pressure power against a work W. |
