JPS5440275A - Manufacture of approximately spherical hollow product by cold forging - Google Patents
Manufacture of approximately spherical hollow product by cold forgingInfo
- Publication number
- JPS5440275A JPS5440275A JP10711177A JP10711177A JPS5440275A JP S5440275 A JPS5440275 A JP S5440275A JP 10711177 A JP10711177 A JP 10711177A JP 10711177 A JP10711177 A JP 10711177A JP S5440275 A JPS5440275 A JP S5440275A
- Authority
- JP
- Japan
- Prior art keywords
- dies
- thick
- walled cylinder
- hollow product
- approximately spherical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/02—Making machine elements balls, rolls, or rollers, e.g. for bearings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
PURPOSE: To highly effiently manufacture the approximately spherical hollow product with accurate outer spherical surface without flash, by cold forging the previously prepared thick-walled cylinder of a specified length without restraining the inner diameter, so as to gradually reduce the outer diameter toward both end portions, and also, by forming the outer surface into approximate sphere.
CONSTITUTION: The specified thick-walled cylinder is previously prepared from the rod type raw material; this cylinder is set in the space formed by punches 1, 2, 3, 4, and is pressed; hereby, the approximately spherical hollow product 5 is formed. In this case, the lower dies 3, 4, have floating springs 8 in the horizontal direction between the shrink ring 6 and the fixing member 7, on purpose to prevent the miss shift of dies 3, 4; when a miss shift happens in dies, the lower dies 3, 4, being guided by the thick-walled cylinder, horizontally move on the surface of the bearing member 9, and hereby, the miss shift of dies is dissolved. Besides, the excess metal at nighborhood of both end portions flows into the gutter during the forming work, so that the thick-walled cylinder does not receive high pressure; therefore, the flash does not flow out into the outer spherical surface, and then, the product 5 with highly accurate outer spherical surface can be manufactured.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10711177A JPS5440275A (en) | 1977-09-06 | 1977-09-06 | Manufacture of approximately spherical hollow product by cold forging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10711177A JPS5440275A (en) | 1977-09-06 | 1977-09-06 | Manufacture of approximately spherical hollow product by cold forging |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5440275A true JPS5440275A (en) | 1979-03-29 |
Family
ID=14450739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10711177A Pending JPS5440275A (en) | 1977-09-06 | 1977-09-06 | Manufacture of approximately spherical hollow product by cold forging |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5440275A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6383101A (en) * | 1986-08-21 | 1988-04-13 | エクソン・ケミカル・パテンツ・インク | Suspension polymerization of high bulk density pvc resin |
-
1977
- 1977-09-06 JP JP10711177A patent/JPS5440275A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6383101A (en) * | 1986-08-21 | 1988-04-13 | エクソン・ケミカル・パテンツ・インク | Suspension polymerization of high bulk density pvc resin |
JP2549294B2 (en) * | 1986-08-21 | 1996-10-30 | エクソン・ケミカル・パテンツ・インク | Suspension polymerization of high bulk density PVC resin |
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