US4356717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forge-shaping sheet members
Assignee: Honda Motor Co Ltd
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Filing: 1980-08-28
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Granted: 1982-11-02
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Expires: 2000-08-28
Abstract
Abstract A method and apparatus for forge-shaping sheet-shaped members having upper and lower dies for pressing and forge-shaping a sheet-shaped material heated to a quenching temperature or an imperfectly quenching temperature set from a required hardness. The apparatus also includes cooling ducts for quenching the forge-shape material. The material is continuously quenched as it is kept pressed.
Inventors
- 👤 Hiromu Okunishi
- 👤 Hideki Nakaji
- 👤 Hiroyuki Suwa
- 👤 Hideaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:56
CPC Classifications
B; B21; B21K; B21K29/00; B21K1/00; B21K1/28; B21K1/32; C; C21; C21D; C21D1/00; C21D1/62; C21D1/673
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A method of forge-shaping a brake disk, comprising the steps of: heating a starting material to a predetermined temperature for attaining a hardness of 30 to 45 HRC required for said brake disk, said starting material having a flat standard steel plate shape and an initial thickness greater than a final thickness after shaping thereof; inserting said heated material as kept heated between upper and lower dies; strongly pressing and forge-shaping said material at an annular disk portion and a central hub-fitting portion thereof to remove irregularities thereon and to attain parallelism and flatness thereof, said material being plastically radially deformed during said forge-shaping such that a portion of said material escapes from said annular disk portion and said central hub-fitting portion to an intermediate portion therebetween; drawing said intermediate portion of said material between said annular and central forge-shaped portions simultaneously with said forge-shaping; and continuously quenching said heated material while it is kept strongly pressed between said upper and lower dies.
Claim 2
Independent Claim
163 words
A method of forge-shaping a brake disk, comprising the steps of: heating a starting material to a predetermined temperature for attaining a hardness of 30 to 45 HRC required for said brake disk, said starting material having a flat standard steel plate shape and an initial thickness greater than a final thickness after shaping thereof; inserting said heated material as kept heated between upper and lower dies; strongly pressing and forge-shaping said material at an annular disk portion and a central hub-fitting portion thereof to remove irregularities thereon and to attain parallelism and flatness thereof, said material being plastically radially deformed during said forge-shaping such that a portion of said material escapes from said annular disk portion and said central hub-fitting portion to an intermediate portion therebetween; drawing said intermediate portion of said material between said annular and central forge-shaped portions simultaneously with said forge-shaping; and continuously quenching said heated material while it is kept strongly pressed between said upper and lower dies.
Claim 3
Dependent Claim
55 words
A method according to claim 1, wherein: said intermediate portion of said material is drawn simultaneously with said forge-shaping so as to shape a truncated conical portion of said brake disk; and said material is punched in said hub fitting portion to shape an axle inserting hole and hub fitting holes simultaneous with said drawing.
Claim 4
Dependent Claim
66 words
A method according to claim 1 or 2, wherein: stepped portions are forge-shaped respectively in the inside diameter portion of said annular disk portion and the outside diameter portion of said hub fitting portion, on either side of said intermediate portion, at the time of said forge-shaping so as to substantially prevent flawing of said annular disk portion and said central hub-fitting portion during said forge-shaping.
Claim 5
Dependent Claim
29 words
A method according to claim 1, wherein: said material comprises a martensitic stainless steel plate material; and said material is heated to a predetermined substantially lowered imperfect quenching temperature.
Claim 6
Dependent Claim
14 words
A method according to claim 1, wherein: said method comprises a single heat-treatment step.
Claim 7
Independent Claim
125 words
An apparatus for forge-shaping a brake disk, comprising: first upper and lower dies for strongly pressing and forge-shaping an annular disk portion and a central hub-fitting portion of a flat standard steel plate material heated to a predetermined temperature for attaining a hardness of 30 to 45 HRC required for said brake disk such that a portion of said material between said dies escapes from said annular disk portion and said central hub-fitting portion to an intermediate portion therebetween; draw-shaping means mechanically and operatively connected with said dies for drawing said intermediate portion of said material between said annular and central forge-shaped portions; and cooling means for continuously quenching the shaped material while said material is kept strongly pressed between said upper and lower dies.
Claim 8
Independent Claim
125 words
An apparatus for forge-shaping a brake disk, comprising: first upper and lower dies for strongly pressing and forge-shaping an annular disk portion and a central hub-fitting portion of a flat standard steel plate material heated to a predetermined temperature for attaining a hardness of 30 to 45 HRC required for said brake disk such that a portion of said material between said dies escapes from said annular disk portion and said central hub-fitting portion to an intermediate portion therebetween; draw-shaping means mechanically and operatively connected with said dies for drawing said intermediate portion of said material between said annular and central forge-shaped portions; and cooling means for continuously quenching the shaped material while said material is kept strongly pressed between said upper and lower dies.
Claim 9
Dependent Claim
74 words
An apparatus according to claim 6, wherein: second upper and lower dies are provided in the outer peripheral portion and central portion, respectively of said first upper and lower dies, said dies being operatively cooperative for draw-shaping said intermediate portion of said material therebetween; and said cooling means comprises cooling water passages for feeding cooling water as required into said upper and lower dies so as to quench all portions of said shaped material.
Claim 10
Dependent Claim
92 words
An apparatus according to claim 6 or 7, further comprising: punches mechanically and operatively connected with said dies for punch-shaping said central hub-fitting portion of said material; and stepped portions provided symmetrically in the inside diameter portion and outside diameter portion of the upper and lower dies for forge-shaping in the inside diameter portion of said annular disk portion and the outside diameter portion of said hub fitting portion, on either side of said intermediate portion, so as to substantially prevent flawing of said annular disk portion and said central hub-fitting portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |