Title:
FORMING PRESS FOR CRANK SHAFT
Document Type and Number:
Japanese Patent JP3358159
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a forming press for a crank shaft high in safety, high in slide strength, excellent in pressing precision and permitting high cycle control.
SOLUTION: In this forming press for a crank shaft in which a torsional forging part and a shaping forging part are provided in the inside of one press, a torsional cylinder 20 is attached to a crown 2, pressing rods 31 are arranged along the outer surface of a slide 4, lower ends of the pressing rods 31 are mutually connected with a torsionally lowering beam and a torsionally returning beam. The slide 4 is an inverse T shape in the cross section, a pressurizing block 23 is an H shape in the vertical view and moreover an inverse U shape in the lateral view, they do not interfere each other, and a large ascending and descending stroke is obtained. The slide 4 and the pressing rods 31 are provided with stoppers (27), 28 which make their relative positional relation coincide and a relief valve for the torsional cylinder 20.
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Inventors:
Masafumi Tado
Koichi Kondo
Koichi Kondo
Application Number:
JP35768998A
Publication Date:
December 16, 2002
Filing Date:
December 16, 1998
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B21D11/16; B21J5/02; B21K1/08; (IPC1-7): B21K1/08; B21D11/16; B21J5/02
Domestic Patent References:
| JP4127929A | ||||
| JP6246386A | ||||
| JP721214U | ||||
| JP4104215U | ||||
| JP524115U | ||||
| JP74640B2 |
Attorney, Agent or Firm:
Yasunobu Yamauchi