JPS5594748A - Heading molding method of ring body - Google Patents
Heading molding method of ring bodyInfo
- Publication number
- JPS5594748A JPS5594748A JP256379A JP256379A JPS5594748A JP S5594748 A JPS5594748 A JP S5594748A JP 256379 A JP256379 A JP 256379A JP 256379 A JP256379 A JP 256379A JP S5594748 A JPS5594748 A JP S5594748A
- Authority
- JP
- Japan
- Prior art keywords
- blank
- ring body
- face
- cut
- central part
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 4
- 238000000465 moulding Methods 0.000 title abstract 2
- 238000005336 cracking Methods 0.000 abstract 1
- 230000003245 working effect Effects 0.000 abstract 1
Landscapes
- Bolts, Nuts, And Washers (AREA)
- Forging (AREA)
Abstract
PURPOSE: To obtain the product of high strength which does not produce any cracking by concentrically shifting rupture structures to the central part to be formed with hole and blanking the central part in piercing process in pressure-molding the ring body by using the blank provided with shear-cut rupture structures at the end face of the cutting part.
CONSTITUTION: An iron-made round bar blank 12 having been cut to the specified size is heading-molded by using the punches 7 thru 10 provided with spherical protruding parts and the intermediate dies 2 thru 5 provided with step parts to shift the shear cut rupture structures S, S' appearing in the end face of the cutting part of the blank to the end face S3 of the small cylindrical part 12g and the bottom S3' of the semi-spherical recess 12f. Thence, if the blank 12' is fitted to the piercing die 6 of the final process and the central part is blanked by a punch 11, the small cylindrical part 12g' is borken down at the step part 12h and a through-hole 12i is formed, whereby the ring body 13 free from rupture structures is obtained. By this method, the product of high quality may be volume-produced without requiring excess workings.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP256379A JPS5594748A (en) | 1979-01-11 | 1979-01-11 | Heading molding method of ring body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP256379A JPS5594748A (en) | 1979-01-11 | 1979-01-11 | Heading molding method of ring body |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5594748A true JPS5594748A (en) | 1980-07-18 |
JPS5614378B2 JPS5614378B2 (en) | 1981-04-03 |
Family
ID=11532833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP256379A Granted JPS5594748A (en) | 1979-01-11 | 1979-01-11 | Heading molding method of ring body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5594748A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4932251A (en) * | 1987-12-22 | 1990-06-12 | Miyamatool Kabushikikaisha | Method of producing a core for a fuel injector |
-
1979
- 1979-01-11 JP JP256379A patent/JPS5594748A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4932251A (en) * | 1987-12-22 | 1990-06-12 | Miyamatool Kabushikikaisha | Method of producing a core for a fuel injector |
Also Published As
Publication number | Publication date |
---|---|
JPS5614378B2 (en) | 1981-04-03 |
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