Importance

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Abstract

A forming tool for generating a predetermined configuration in a rotating metal workpiece includes a tool body having a shelf formed thereon, a shim on the shelf, a cutting insert having a cutting edge on the shim and a clamp assembly for clamping the insert and the shim on the tool body. The clamp assembly includes a clamp member having top and bottom sides, and a pair of screws for securing the clamp member on the tool body. The clamp member has a pair of substantially parallel elongated front and rear clamping pads formed on the bottom side thereof and it is mounted so that one of the clamping pads is supported on the tool body whereas the other clamping pad engages the insert to secure it on the tool body. The clamp member has an arcuate crown formed on the top side thereof which is oriented so that the apex thereof is substantially parallel to the clamping pads. The screws of the clamp assembly are received in threaded engagement in the tool body and they are oriented so that the heads thereof engage the arcuate crown on the clamp member along a line which is forward of the axes of the screws in order to pivot the clamp member forwardly and downwardly toward the insert to enable the clamp assembly to compensate for variations in the thickness of the insert while utilizing mechanical advantage to insure maximum clamping force.

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First Claim