Preparing a tube end for rod drawing
First Claim
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1. An apparatus for preparing a tube end for rod drawing, the apparatus comprising:
- a floating mandrel;
a releasable holder for the tube end centered on an axis;
a frustoconical spreading mandrel;
means for inserting the spreading mandrel into the tube end and spreading the spreading mandrel to flare the tube end; and
means for inserting the floating mandrel into the flared end of the tube after insertion into and removal of the spreading mandrel from the tube.
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Abstract
An apparatus for preparing a tube end for rod drawing with a floating mandrel has a releasable holder for the tube end centered on an axis, a frustoconical and spreadable floating mandrel, and a device for inserting the mandrel into the tube end and spreading the mandrel to flare the tube end. The apparatus further has a feed mechanism for inserting the floating mandrel into the tube end and/or a deforming device for making at least one indentation in the tube for holding the floating mandrel.
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Citations
12 Claims
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1. An apparatus for preparing a tube end for rod drawing, the apparatus comprising:
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a floating mandrel; a releasable holder for the tube end centered on an axis; a frustoconical spreading mandrel; means for inserting the spreading mandrel into the tube end and spreading the spreading mandrel to flare the tube end; and means for inserting the floating mandrel into the flared end of the tube after insertion into and removal of the spreading mandrel from the tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for preparing a tube end for rod drawing, the method comprising the steps of:
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a) holding the tube centered on an axis; b) forming a first indentation in the held tube end with a deforming device; c) widening the tube end of the held tube with a frustoconical spreading mandrel while holding the tube end against axial movement by engagement of the deforming device in the first indentation; and d) introduction a floating mandrel by a feed mechanism into the tube end until before the first indentation. - View Dependent Claims (10, 11, 12)
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Specification