US 6,723,944 B1 · Pinch weld gun

Abstract

A pinch type weld gun wherein the weld arms are pivotally mounted on the frame structure via a ball bearing structure including annular members of insulative material positioned in apertures in the weld arms, inner races fixedly mounted on a common pivot pin, outer races positioned within the respective insulative annular members, and ball races positioned between the respective inner races and respective outer races. A shunt is fixedly secured at one end thereof to a gun electrode and fixedly secured at another end thereof to the gun transformer, and the other end of the shunt defines a coolant passage communicating with the transformer coolant passage system whereby coolant may be delivered to the transformer coolant passage system through the coolant passage in the other end of the shunt. A second shunt fixedly secured at one end thereof to a further electrode and fixedly secured at another end thereof to the transformer defines a further coolant passage in the other end thereof communicating with the transformer coolant passage system so that the coolant may be delivered to the transformer coolant passage system through the coolant passage in the other end of the first shunt and discharged from the transformer coolant passage system through the coolant passage in the other end of the second shunt to provide a continuous flow of coolant through the transformer coolant passage system. A cooling liquid distribution block is mounted on the gun frame at a location remote from the electrodes and concentric tubing extends from the distribution block to the electrodes for respective connection to concentric passageways defined in the electrodes.

Claims21

Dependent claims

A weld gun including a frame structure, a weld arm, and a pivot structure pivotally mounting the weld arm on the frame structure, characterized in that:

the pivot structure comprises a pivot pin carried by the frame structure, an inner race mounted on the pivot pin, an annular member of electrically insulative material positioned in an aperture in the weld arm, an outer race mounted within the annular member, and a ball race rollably positioned between the inner race and the outer race.

A weld gun including:

a frame structure;
a weld arm;
a pivot pin carried by the frame structure;
an inner race mounted on the pivot pin;
an annular member of electrically insulative material positioned in an aperture in the weld arm;
an outer race mounted within the annular member;
and
a ball race rollably positioned between the inner race and the outer race.

5 more elements

A weld gun including a frame structure, a weld arm mounted on the frame structure, an electrode mounted at one end thereof on the weld arm and defining concentric cooling passages for delivery of a cooling liquid from the one electrode end to a weld tip at an opposite end of the electrode and return movement of cooling liquid from the weld tip to the one electrode end, a source of cooling liquid, and coolant flow means interconnecting the one end of the electrode and the cooling liquid source and operative to deliver cooling liquid from the source to the one electrode end for delivery to the weld tip and receive cooling liquid from the one electrode end for return flow to the source, characterized in that:

the coolant flow means comprises a distribution device mounted on the frame structure at a location remote from the one end of the electrode, tubing structure for delivering coolant liquid from the source to the distributor device and return cooling liquid from the distributor device to the source, and concentric tubing extending from the distribution device to the one end of the electrode for respective connection to the respective concentric cooling passages defined by the electrode.

Dependencies are inferred from the claim text.

Pinch weld gun

Life of this patent

Pinch weld gun

Life of this patent

Abstract

Claims21