Claims
- 1. A deep drawing method for making a thin-walled bearing bushing from a flat circular member comprising a cylindrical sleeve section and a bottom section closing one end of the sleeve section having an outer peripheral rim at the juncture of the sleeve and bottom sections of small cross sectional radius consisting of the steps of cold pressing the bottom section and deep drawing the sleeve section in a single press stroke in the bore of a generally cylindrical die by a drawing ram engaging in the bore of the die and a cooperating counter ram positioned at the open end of the die confronting the bottom section, and simultaneously impressing an annular groove in one face of the bottom section closely adjacent the junction of the bottom and sleeve sections to effect radial outward displacement of the material in the bottom section into the area of the peripheral rim and uniform compression thereof in this area.
- 2. A method as claimed in claim 1 wherein the groove is impressed in the outer face of the bottom section.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2952092 |
Dec 1979 |
DEX |
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Parent Case Info
This application is a divisional of our prior U.S. application No. 06/218,520 filed Dec. 22, 1980, now U.S. Pat. No. 4,377,313.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
2384444 |
Cravener, Jr. et al. |
Sep 1945 |
|
2934813 |
Nippert |
May 1960 |
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Foreign Referenced Citations (1)
Number |
Date |
Country |
853594 |
Dec 1939 |
FRX |
Divisions (1)
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Number |
Date |
Country |
Parent |
218520 |
Dec 1980 |
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