JPS62142493U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing a main girder welding jig which is an embodiment of the present invention. FIG. 2 is a side view representatively showing one of the clamp units in the welding jig, and FIG. 3 is a plan view showing it with some of its constituent members removed. FIG. 4 is an enlarged side view of the clamp mold in the clamp unit, and FIG. 5 is a perspective view of a portion thereof. FIG. 6 is an explanatory diagram schematically showing the upper and lower clamp types of the clamp unit at the right end in FIG. 1, and FIG. 7 is an explanatory diagram showing the vicinity of the clamp unit at the left end. FIG. 8 is a perspective view showing a frame of a truck including a main girder welded by the apparatus of the embodiment. FIG. 9 is an explanatory diagram showing the distortion caused during welding of the main girder and the reverse warp applied to remove the distortion. FIG. 10 is a cross-sectional view of the main girder. 10: Main girder, 14: Outer channel, 16:
Inner channel, 22, 22a, 22b, 22
c: Clamp unit, 24, 24b: First support base, 28: Side clamper, 30: Upper and lower clamper, 32: Side clamp type, 34: Rotating arm,
40: Hydraulic cylinder, 50, 50c, 50d: Lower clamp type, 52, 52c, 52d: Upper clamp type, 54: Rotating arm, 60: Hydraulic cylinder, 7
0: Clamp surface, 80: Temporary attachment part, 82, 82c,
82d: Clamp surface, 84, 84c, 84d: Clamp surface, 100: Hydraulic cylinder, 102: Guide rod, 104: Guide tube, 106: Semi-finished product.

Claims (1)

[Scope of Claim for Utility Model Registration] A jig used for temporary welding of multiple long materials at multiple points spaced apart in the longitudinal direction, and then regular welding along the longitudinal direction. , a first set and a second set of clampers, which are moved closer to each other and separated from each other in two orthogonal straight directions and clamp a long material in two orthogonal directions, are each arranged in three sets separated by a distance in the longitudinal direction of the long material. A second set of clampers arranged as above, each clamping the vicinity of both ends of the long material, and allowing rotation of the long material in a plane parallel to the approach/separation direction of the second set of clampers. and a clamper moving device for moving a second set of clampers that clamps the central part of the long material by a predetermined distance in a direction parallel to the approach/separation direction of the second set of clampers, A long material welding jig, characterized in that after tacking is completed, a clamper moving device is operated to bend the semi-finished product after tacking.