Process for the production of a hollow workpiece being profiled

Details Process for the production of a hollow workpiece being profiled Process for the production of a hollow workpiece being profiled

1993-07-02

1994-10-18

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72 96, B21D 2216

Patent

active

053557069

ABSTRACT:
The well known Grob method, as practiced on a Grob machine, uses at least a partially profiled mandrel wherein during a cold forming operation, via a forming or impact roller of a workpiece blank, produces a hollow workpiece that is profiled at least internally wherein the material is shaped radially as well as axially in a single operation and the axial and radial shaping of the workpiece blank is achieved at least internally as a whole or in part in a straight or helical manner relative to the workpiece axis, by means of this forming roller and achieves the economical production of high quality workpieces in a single operation, with outer profiling also being achievable, and the difference (D) between the outer radius (RO) of the workpiece blank and the outer radius (RD) of the mandrel preferably being the same as or smaller than the length (WL) of the finished workpiece.

REFERENCES:
patent: 3354535 (1967-11-01), Winnai et al.
patent: 4796345 (1989-01-01), Krapfenbauer
patent: 4872250 (1989-10-01), DeMarco

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