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US 4,215,262 AGranted
Automatic percussion welding apparatus with stud feed
AssigneeConceptual Engineering
InventorCarl H. Brastow
Life of this patent
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AssigneeConceptual Engineering
InventorCarl H. Brastow
Estimating the term…
A percussion welder includes a single acting main cylinder having a ram extending through both ends of the cylinder mounting a spring loaded chuck on one end of the ram and an adjustable return spring on its other end. An automated version includes a hollow ram for the main cylinder through which a stud to be welded is blown from an escapement in a vibratory feeder bowl. The escapement has two spaced guide rails which receive the studs in a single column and a block which slides transversely across the end of the rails to pick off a single stud and move it into alignment with a gush of air which blows the stud head first through a tube to the hollow ram. A chuck having a stationary and a movable clamp is mounted on the opposite end of the ram. An actuator is disposed adjacent the chuck and opens the chuck to permit the stud to pass therethrough and at the same time places a platform beneath the chuck to prevent the stud from exiting the chuck more than a selected distance. When the actuator is withdrawn the body of the stud is clamped with the head outside the chuck. One of the clamps is provided with a centering groove to ensure proper disposition of the stud.
Apparatus for welding an element to a work piece comprising a support, a ram member mounted on the support and adapted for rectilinear motion between a first position away from a work piece station and a second position adjacent the work piece station, pneumatic means for causing the ram to move from its first to its second position and return spring means urging the ram toward its first position, the ram is vertically disposed and has two opposite ends and a bore extends therebetween, chuck means, for clampingly engaging the element, mounted on a portion of the ram closest to the work piece station, the chuck comprising a stationary clamp member having a clamping surface in alignment with the bore in the ram, a movable clamp member adapted for movement toward and away from the stationary clamp member effectively closing and opening the bore, spring means urging the movable clamp member toward the stationary clamp member and actuating means to move the movable clamp member away from the stationary clamp member to permit an element to be received in the chuck, and means for creating an electric field between the element and the work piece.
In a welding apparatus having work piece holding means and means to hold an element to be welded to the work piece and move it into engagement with the work piece to effect welding therebetween an improved chuck to hold the element comprising a housing having opposed side walls, a transversely extending slot formed in the opposed side walls, a stationary clamp member mounted in the housing having a clamping surface, a movable clamp member adapted for movement toward and away from the stationary clamp member, two pins projecting from the movable clamp member and extending through respective slots, spring means urging the movable clamp member toward the stationary clamp member, and actuator means to move the movable clamp member away from the stationary clamp member to permit an element to be received between the stationary and movable clamp members, the actuator means to move the movable clamp includes an actuator comprising a pair of pusher blocks adapted for movement into engagement with respective pins forcing them and concomitantly the movable clamp member to move against the bias of the spring means away from the stationary clamp member.
Apparatus for welding an element to a work piece comprising a support, a ram member mounted on the support and adapted for rectilinear motion between a first position away from a work piece station and a second position adjacent the work piece station, pneumatic means for causing the ram to move from its first to its second position and return means for returning the ram to its first position, chuck means for clampingly engaging an element, means for feeding an element to the chuck means, the chuck means having a mouth and being mounted on a portion of the ram closest to the work station, means for creating an electric field between the element and the work piece, and a platform movable to a position in alignment with the mouth of the chuck spaced a selected distance therefrom, said platform serving as a stop for elements fed to said chuck means.
Dependencies are inferred from the claim text.