METHOD FOR MAKING INTERNAL PROFILE WITH MANDREL WORKING ON INNER SURFACE OF CUP-LIKE OR ANNULAR ROTATION-SYMMETRIC WORKPIECE

Title:

METHOD FOR MAKING INTERNAL PROFILE WITH MANDREL WORKING ON INNER SURFACE OF CUP-LIKE OR ANNULAR ROTATION-SYMMETRIC WORKPIECE

Document Type and Number:

Japanese Patent JP2006341287

Kind Code:

A

Abstract:

To provide a method for manufacturing a transmission component provided with an internal gear having larger rotation-symmetry and higher accuracy.

The method is for manufacturing an internal profile by use of a mandrel working on the inner surface of a cup-like/annular rotation-symmetric product. In the method, a workpiece 1, whose outside is prepared or prefabricated so as to have a fitting tolerance, is inserted into a matrix 6 and pressed, in cold-working, against the inner wall of the matrix 6 by a mandrel 3, which is driven to rotate, in a state of frictional-fitting and receiving torsion strength. Further, the workpiece 1 is ejected by an axial direction piston 7 after completion of roll forming of its profiling part. On the other hand, the mandrel 3 is provided with an outside profiling part, supported freely movably, and sent in an axial direction and a radial direction in roll forming.

Inventors:

TITTMANN UWE
SHULTEN MATTHIAS
WALTER MANFRED

Application Number:

JP2005169738A

Publication Date:

December 21, 2006

Filing Date:

June 09, 2005

Export Citation:

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Assignee:

PROFIROLL TECHNOLOGIES GMBH

International Classes:

B21H1/00; B21H1/18; B21H5/00

Domestic Patent References:

JP2001030035A	2001-02-06
JP2005009646A	2005-01-13
JPS5417352A	1979-02-08
JPH1034271A	1998-02-10
JPS59225838A	1984-12-18
JPS63149034A	1988-06-21
JPS57112939A	1982-07-14
JPH0160735U	1989-04-18
JPS6094343U	1985-06-27

Attorney, Agent or Firm:

Masahiro Ishino

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