Gm Global Technolgoy Operations, Inc.

Mark D Gugel

Pei-chung Wang

James Franklin Hengel

Bradley J Blaski

John D Fickes

Joseph M Lendway, Iv

Mark T Hall

Robert J Gollehur

Alexander Michael Turley

Narayanan P Menon

Gregory J Zywicki

A drawn arc welding assembly and method for simultaneously welding a stud to a first workpiece and a second workpiece that are affixed together and have an electrically insulating joining layer between the workpieces. A pair of leads attach to the first workpiece and the second workpiece, with electrically opposite diodes connected between the leads and a power supply. The power supply also provides power to a stud. During welding, two arcs are simultaneously maintained between the stud and first workpiece and between the stud and second workpiece. The power supply may be chopped AC from a dual inverter power supply.

Drawn arc welding

A method for making a projection on a metal panel includes providing a lower die having a recess in the shape of the desired projection, laying the metal panel atop the lower die, positioning a filler material atop the metal panel, and lowering an upper die onto the filler material so that the filler material is forced into the metal panel and in turn forces the metal panel into the recess of the lower die whereby a projection is formed and the projection is filled with the filler material.

Forming method for projection welding projections

A method is provided for the projection electric resistance welding of a component to a laminated metal member. The laminated metal member is comprised of top and bottom metal sheets adhered together by a polymer layer provided between the top and bottom metal sheets. A plurality of projections is provided on the component and the projections extend toward the top metal sheet of the laminated metal. Force is applied to the component and the projections have a pointed shape so that the projections pierce through the top metal sheet and contact the bottom metal sheet. Weld current is then applied to flow through the projections so that the projections are electric resistance welded to both the top and bottom metal sheets.

Method and apparatus for welding to laminated metal

A tool peels apart a sample weld between a top sheet and a bottom sheet of metal while the bottom sheet is held in a vise. The tool includes a wheel having a peripheral rim surface. A handle is attached to the wheel so that rotating the handle rotates the wheel. A clamping mechanism is mounted on the wheel and moves between an open position spaced from the peripheral rim surface and a closed position in which the clamping mechanism clamps the top sheet to the peripheral rim surface so that rotation of the wheel by the handle will progressively wrap the top sheet about the peripheral rim of the wheel and thereby forcibly peel the top sheet away from the bottom sheet to pull apart the weld between the top and bottom sheets.

Tool for peeling apart a weld sample

A nut and a method of attaching the nut to a work piece includes the nut having a top side with a threaded bore therein to receive a bolt and the nut having an underside with a skirt depending from the outer periphery thereof. A shank depends from the nut and extends into a hole in the work piece to which the nut is to be attached. A heat curable adhesive coats the shank and also coats the underside of the nut between the depending shank and the depending skirt so that upon curing of the heat curable adhesive the nut is adhesively secured to the work piece.

Growing community of inventors

Rochester Hills, MI, United States of America

Mark D Gugel