Preparing a tube end for rod drawing
AssigneeSMS group GmbH
InventorsHardy Jungen, Thomas Winterfeldt
Life of this patent
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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.
Claims12
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.
A method for preparing a tube end for rod drawing, the method comprising the steps of:
- 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.
Dependencies are inferred from the claim text.