Boring machine and method of rigidizing a boring bar
OwnerAlex Shashatyinventor
Life of this patent
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Abstract
In a boring machine having an elongated rotating boring bar for internal end boring of elongated workpieces, the boring bar is rigidized during initial internal boring operations by clamping the workpiece in axial alignment with the axially rotating elongated boring bar and the boring bar is radially clamped intermediate its ends with a clamp which rotates with the rotating bar to rigidize the bar during initial boring operations. After initial end boring of the workpiece, the clamp is radially retracted and the boring operation is continued on the workpiece to a depth beyond the position of previous clamping on the boring bar.
Claims10
A boring machine for boring pipe ends or other elongated workpieces comprising, a support frame, a boring bar secured at one end thereof to said frame and having boring tool means on its other or free end for inside boring of an elongated workpiece, drive means on said frame to provide relative boring rotation between a workpiece to be bored and said boring bar, and radially retractable clamp means carried by said frame for radially clamping said boring bar intermediate its ends to rigidly support said bar during initial boring operations on an elongated workpiece and adapted for outward radial retraction to coaxially pass a workpiece end being internally bored over said bar past said clamp means after completion of said initial boring operations, said drive means including a spindle journaled for rotation on its axis in said frame, a motor in rotary driving engagement with said spindle, said boring bar axially aligned with said spindle and said one end thereof secured to one end of said spindle, said radially retractable clamp means being rotatably carried by said one end of said spindle.
A method of rigidizing an elongated boring bar during initial internal boring operations of a pipe end or other elongated workpieces comprising the steps of, clamping the workpiece in axial alignment with an elongated boring bar having a boring tool on one end thereof for boring said workpiece, radially clamping said elongated boring bar intermediate its ends with a clamp to rigidize said bar during initial boring operations of said workpiece, axially engaging said boring tool with said workpiece and axially rotating said clamp with said boring bar to thereby initially end bore said workpiece, thereafter radially unclamping said bar, and continuing the axial end boring operation of said workpiece to a depth beyond the position of previous clamping on said bar.
Dependencies are inferred from the claim text.