Title:
METHOD AND EQUIPMENT FOR BENDING BLADE STOCK FOR ROTARY DIE
Document Type and Number:
Japanese Patent JP2003001352
Kind Code:
A
Abstract:
To bend a band-shaped blade stock across the width without any unprocessed part on the edge-of the blade stock remaining.
The band-shaped blade stock 1 is subjected to a compressing- stretching process in which the blade stock 1 is compressed in the thickness direction and then stretched longitudinally. In the compressing-stretching process the amount of compression of the blade stock 1 is gradually increased across the width toward one edge. The blade stock 1 is moved in turn in one longitudinal direction of the blade stock 1 while being compressed and stretched. The compressing-stretching process is performed by means of pressing dies 4 and 5.
Inventors:
MIZUKAWA SUEHIRO
Application Number:
JP2001181378A
Publication Date:
January 07, 2003
Filing Date:
June 15, 2001
Export Citation:
Assignee:
MIZUKAWA SUEHIRO
International Classes:
B21D11/08; B21D37/20; B21D53/64; (IPC1-7): B21D53/64; B21D11/08
Domestic Patent References:
| JPH11169955A | 1999-06-29 | |||
| JPH08216298A | 1996-08-27 |
Foreign References:
| US0174388A | 1876-03-07 | |||
| US0319442A | 1885-06-09 | |||
| US3926031A | 1975-12-16 |
Attorney, Agent or Firm:
Koichi Suzue (1 person outside)