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Welding Fixture and Process

IP.com Disclosure Number: IPCOM000094292D
Original Publication Date: 1966-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 88K

Publishing Venue

IBM

Related People

Sickles, OG: AUTHOR

Abstract

Fixture 1 allows frame 2 to be welded by a process that produces a finished frame. This need not be straightened or squared after the welding process is completed. Frame 2 comprises lower rectangular base 3, upper rectangular portion 4, and a plurality of vertical uprights 5 extending between 3 and 4. Frame 2 is made by first forming portions 3 and 4, placing such portions in fixture 1, placing uprights 5 in the fixture between portions 3 and 4, clamping the uprights between 3 and 4 and then welding the joints in a fixed welding sequence which minimizes distortion of the frame. Portion 4 is placed in fixture 1 in a position, determined by trial and error beforehand, which controls the distortion, due to welding. This is effected by causing the shrinkage to draw the frame parts into a straightened and squared condition.

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Welding Fixture and Process

Fixture 1 allows frame 2 to be welded by a process that produces a finished frame. This need not be straightened or squared after the welding process is completed. Frame 2 comprises lower rectangular base 3, upper rectangular portion 4, and a plurality of vertical uprights 5 extending between 3 and 4. Frame 2 is made by first forming portions 3 and 4, placing such portions in fixture 1, placing uprights 5 in the fixture between portions 3 and 4, clamping the uprights between 3 and 4 and then welding the joints in a fixed welding sequence which minimizes distortion of the frame. Portion 4 is placed in fixture 1 in a position, determined by trial and error beforehand, which controls the distortion, due to welding. This is effected by causing the shrinkage to draw the frame parts into a straightened and squared condition. Thus the completed frame need not be straightened by subsequent operation.

Fixture 1 comprises base 6 and vertically movable table need not be rotated through as great an angle as those in the front.

Fixture 1 is adjustable to compensate for draw and to produce different sized frames. To accomplish this, jaws 8 are mounted in pairs on lead screws 18. One end of each lead screw 18 has a right hand thread. The other end has a left-hand thread. Jaws 8 connected to these ends move towards and away from each other, to the same degree, in response to rotation of the lead screw as caused by rotation of handle 19. Longitudinal l...