Apparatus for staking
AssigneeMichael Ladney
InventorNorman S. Loren
Life of this patent
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Abstract
A method and apparatus for staking a formable projection, for example, a tab or boss, to retain plural articles in a unitary assembly. A projection on a first article is brought into registering position with an aperture in a second article to form the assembly. The assembly is clamped by a spring-loaded clamp pad which bears against the second article and surrounds the projection. The projection is then staked by action of a tool which travels reciprocally within the clamp pad and has a tip which cooperates with the clamp pad to form a cavity of desired shape. The forming stroke of the tool is against the resistive force of the spring, which increases the clamping force of the clamp pad. The formed projection is therefore contained within the inner boundary of the clamp pad and tool tip to thereby promote uniform head formation.
Claims19
A device for staking a formable plastic projection onto a work surface comprising:
- clamp means, adapted to contact the work surface, for retaining the work in fixed position;
- tool means, having travel between a retracted position and an extended position to define a staking stroke, for engaging said projection to form a staked head;
- and
- bias means, interposed between the tool means and the clamp means and responsive to movement of the tool means through the staking stroke, to thereby apply a progressive clamping force on the work surface of sufficient magnitude to retain the work in fixed position during formation of the staked head.
A device for staking a heat softened plastic projection onto a work surface comprising:
- clamp means, adapted to contact the work surface in surrounding relation to the projection, for retaining the work in fixed position;
- tool means, having travel between a retracted position and an extended position to define a staking stroke, for forming the projection, and wherein the tool means in its extended position is cooperative with the clamp means to define a die cavity tocontainthe flow of the sofented plastic during formation and thereby define the shape of the staked head.
Dependencies are inferred from the claim text.