JPS5561329A - Bulge forming method - Google Patents
Bulge forming methodInfo
- Publication number
- JPS5561329A JPS5561329A JP13170578A JP13170578A JPS5561329A JP S5561329 A JPS5561329 A JP S5561329A JP 13170578 A JP13170578 A JP 13170578A JP 13170578 A JP13170578 A JP 13170578A JP S5561329 A JPS5561329 A JP S5561329A
- Authority
- JP
- Japan
- Prior art keywords
- blank
- internal pressure
- water
- bubbles
- air
- 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
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
PURPOSE: To form under constant internal pressure, by injecting liquid to change the air in the blank into bubbles, and discharging liquid while compressing the bubbles with the pressure of die and injection.
CONSTITUTION: As a plate 30 is lowered, pistons 23, 24 are pressed down, and water is injected into a blank 50 from a nozzle 17. This injected water agitates the air in the blank 50, and the air is changed into bubbles which then disperse, while the bubbles are also compressed by the injected water and the internal pressure elevates. At this time, the internal pressure of the blank 50 is further raised by its internal pressure and the die being pressed down from above, and the volume of the blank 50 begins to increase. At the same time, the injected water is discharged from the space between the nozzle 17 and the blank 50 to keep the internal pressure constant. When the majority of forming process is over, pressurization of the piston 23 having the shorter stroke is stopped, and the finishing process is accomplished with a small quantity of water by the pressuried water from the piston 24.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13170578A JPS5561329A (en) | 1978-10-27 | 1978-10-27 | Bulge forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13170578A JPS5561329A (en) | 1978-10-27 | 1978-10-27 | Bulge forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5561329A true JPS5561329A (en) | 1980-05-09 |
| JPS5625332B2 JPS5625332B2 (en) | 1981-06-11 |
Family
ID=15064266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13170578A Granted JPS5561329A (en) | 1978-10-27 | 1978-10-27 | Bulge forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5561329A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57189142U (en) * | 1981-05-27 | 1982-12-01 | ||
| JPS5864648A (en) * | 1981-10-13 | 1983-04-18 | Matsushita Electric Ind Co Ltd | Driving device for objective lens |
| JPS5887146U (en) * | 1981-12-08 | 1983-06-13 | 松下電器産業株式会社 | Light focusing position control device |
| JPS59130236U (en) * | 1983-02-17 | 1984-09-01 | 赤井電機株式会社 | Optical pickup actuator |
| JPS59217240A (en) * | 1983-05-23 | 1984-12-07 | Mitsubishi Electric Corp | Optical means driving device |
| JPS6157317U (en) * | 1984-09-20 | 1986-04-17 | ||
| JPS6257926U (en) * | 1985-09-28 | 1987-04-10 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317648U (en) * | 1976-07-26 | 1978-02-15 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL171930C (en) * | 1972-05-11 | 1983-06-01 | Akzo Nv | METHOD FOR DETERMINING AND DETERMINING BITES AND TEST PACKAGING. |
-
1978
- 1978-10-27 JP JP13170578A patent/JPS5561329A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317648U (en) * | 1976-07-26 | 1978-02-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5625332B2 (en) | 1981-06-11 |
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