JPS5519464A - Pressure balancing method in liquid pressure bulging device - Google Patents
Pressure balancing method in liquid pressure bulging deviceInfo
- Publication number
- JPS5519464A JPS5519464A JP9252778A JP9252778A JPS5519464A JP S5519464 A JPS5519464 A JP S5519464A JP 9252778 A JP9252778 A JP 9252778A JP 9252778 A JP9252778 A JP 9252778A JP S5519464 A JPS5519464 A JP S5519464A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- liquid pressure
- lateral
- forcing
- current
- 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 prevent the sealing at the end of the blank pipe from being ruptured at the molding by converting the primary side liquid pressure of a booster which generates bulge liquid pressure to voltage and current, then controlling lateral-forcing liquid pressure in proportion to the abovementioned current changing with the ratios of blank pipe area and the pressure receiving area of the lateral-forcing liquid pressure.
CONSTITUTION: A pressure head 11 which converts the primary side liquid pressure P1 of a booster 8 is connected to the primary side of the booster 8. To this pressure head 11 is connected an amplifier 12 by way of a variable resistance 13 which sets balance ratio n=(lateral-forcing area A2/inside area of blank pipe A1). Further this is connected to the proportional electromagnetic relief valve 14 being the pilot relief means of the pressure regulator 15 in the lateral-forcing circuit to convert the primary liquid pressure P1 to voltage by the pressure head 11. This voltage is next converted to current by the amplifier 12. At this time, the balance ratio n is beforehand set by the variable resistance 13. Next, the converted current is supplied to the relief valve 14 to control the lateral-forcing liquid pressure P3 whereby this pressure P3 is made proportional to the change in the bulge liquid pressure P2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9252778A JPS5519464A (en) | 1978-07-31 | 1978-07-31 | Pressure balancing method in liquid pressure bulging device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9252778A JPS5519464A (en) | 1978-07-31 | 1978-07-31 | Pressure balancing method in liquid pressure bulging device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5519464A true JPS5519464A (en) | 1980-02-12 |
JPS5646450B2 JPS5646450B2 (en) | 1981-11-04 |
Family
ID=14056808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9252778A Granted JPS5519464A (en) | 1978-07-31 | 1978-07-31 | Pressure balancing method in liquid pressure bulging device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5519464A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107427891A (en) * | 2015-03-31 | 2017-12-01 | 住友重机械工业株式会社 | Shaped device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0665126U (en) * | 1993-02-23 | 1994-09-13 | 栄一 小林 | Water drop removal device for vehicles |
-
1978
- 1978-07-31 JP JP9252778A patent/JPS5519464A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107427891A (en) * | 2015-03-31 | 2017-12-01 | 住友重机械工业株式会社 | Shaped device |
Also Published As
Publication number | Publication date |
---|---|
JPS5646450B2 (en) | 1981-11-04 |
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