B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
294/9
B23K 37/02 (2006.01) B23K 9/28 (2006.01) B25J 9/02 (2006.01) B25J 9/10 (2006.01) B25J 17/02 (2006.01)
Patent
CA 1251242
51,993 -13- ABSTRACT OF THE INVENTION The invention provides an improved welding torch wrist and improved elongated axis post member for use with an industrial manipulator or the like. The improved wrist is adapted to be mounted onto the industrial manipulator typical- ly in the spaced relationship therewith by means of an axis post. The welding torch wrist includes a housing adapted to be mounted onto the industrial manipulator, a torch holding member which is operably associated with the housing for controlled movement about a first axis through a predeter- mined arc of travel and a drive unit including a DC servo motor coupled to a harmonic drive mounted in the housing for affecting the aforedescribed controlled movement. The drive unit is mounted in the housing so as to be radially disposed relative to the arc of travel of the torch holding member. This end line construction is made possible through the use of a pair of beveled gears. One of the pair of beveled gears is a spring loaded split bevel antibacklash gear which totally eliminates gear backlash. This is particularly critical during the torch tip weave affected during welding operations. The improved axis post provides extended welding capabilities to the improved wrist by permitting deep vessel welding oper- ations. The improved post includes a pair of thin wall tub- ular members which are welded together and provided with add- itional support members. The axis post is so configured to orient the welding torch toward the "Z" axis of an industrial manipulator.
482797
Stoutamire Mark S.
Swartzbeck Gary W.
Swensrud Roger L.
Oldham And Company
Unimation Inc.
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