Title:
METHOD FOR PRODUCING BRAKE DISC, AND BRAKE DISC
Document Type and Number:
WIPO Patent Application WO/2020/179316
Kind Code:
A1
Abstract:
The present invention reduces differences in the chamfering amounts of recesses and protrusions in a brake disc having a corrugated section in which recesses and protrusions are formed in a repeating manner on the outer circumference. In this method for producing a brake disc, an upper mold (31) and a lower mold (32) are used to form a corrugated section in which recesses (10a) and protrusions (10b) are formed in a repeating manner in a brake disc intermediate product (30), the brake disc intermediate product is set in a die, the die has an inclined surface (51) corresponding to the corrugated section, a corner section (46) formed along the outer circumferential edge of the corrugated section is brought into contact with the inclined surface when the brake disc intermediate product is set in the die, the brake disc intermediate product is pressed in the direction of the die, the corner section is brought into contact with the inclined surface and deformed so that a chamfered section (40) is formed, and the inclined surface is formed so that the chamfering angle formed with respect to the inner bottom surface of the die is larger at the parts brought into contact with the recesses than at the parts brought into contact with the protrusions. The clearance (A + α) between the upper mold and the lower mold in the recesses is larger than the clearance (A) between the upper mold and the lower mold in the protrusions.
Inventors:
TAKENAKA TADASHI (JP)
KUBOTA SATOSHI (JP)
KUBOTA SATOSHI (JP)
Application Number:
PCT/JP2020/004084
Publication Date:
September 10, 2020
Filing Date:
February 04, 2020
Export Citation:
Assignee:
SUNSTAR ENGINEERING INC (JP)
International Classes:
B21D19/00; B21D28/00; B21D28/14; B21D53/86; F16D65/12
Domestic Patent References:
| WO2005054703A1 | 2005-06-16 |
Foreign References:
| JP2010236675A | 2010-10-21 | |||
| JP2008298094A | 2008-12-11 | |||
| JP4155301B2 | 2008-09-24 | |||
| JP4973586B2 | 2012-07-11 | |||
| JP2008298094A | 2008-12-11 |
Other References:
See also references of EP 3909698A4
Attorney, Agent or Firm:
YAMAMOTO, Osamu et al. (JP)
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