GB531213A - Improvements in devices for protecting metal-drawing presses - Google Patents
Improvements in devices for protecting metal-drawing pressesInfo
- Publication number
- GB531213A GB531213A GB20525/39A GB2052539A GB531213A GB 531213 A GB531213 A GB 531213A GB 20525/39 A GB20525/39 A GB 20525/39A GB 2052539 A GB2052539 A GB 2052539A GB 531213 A GB531213 A GB 531213A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- press
- spring
- air
- signal
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Presses (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
531,213. Machinery guards. OPEL AKT.-GES., A. July 14, 1939, No. 20525. Convention date, Aug. 12, 1938. [Class 80 (iv)] Stamping presses are provided with a safety device to prevent injury to the dies in the event of the metal fracturing during the operation in which case compressed air escaping through the crack lowers the pressure in the supply pipe and movement of a spring-loaded piston causes the operation of a visible or audible signal and may stop the press. The escaping air may actuate a siren. In the form shown the metal is most likely to crack at 6 and air is fed to this part of the punch by conduits 7 fed from a distribution channel 10, supplied at 8 with compressed air through a valve 9. A branch port 19 supplies a cylinder with a spring-loaded piston. Whenever air escapes at 7 the resulting drop of pressure enables the spring 16 to close switch 15, and if this occurs during the drawing stroke the drop B, C in a cam 23 rotating synchronously with the press shaft has also enabled a switch 22 to release and a signalling device such as a lamp 11 is actuated. The high part A of the cam opens the switch 22 and prevents the signal from being actuated during the up-stroke of the press on the down-stroke before the draw is sufficiently advanced to close the conduits 7. The switches are double acting and in the positions in which the signal circuit is broken they close the circuit through a solenoid 26 that maintains a switch 28 closed. The two solenoid switches are in parallel and consequently the switch 28 is maintained closed except when the alarm signal 11 operates. The press then stops and can be packed to remove the defective work before damage occurs to the dies.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE531213X | 1938-08-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB531213A true GB531213A (en) | 1940-12-31 |
Family
ID=6554844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20525/39A Expired GB531213A (en) | 1938-08-12 | 1939-07-14 | Improvements in devices for protecting metal-drawing presses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB531213A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3527073A (en) * | 1967-12-15 | 1970-09-08 | Ind Controls Inc | Fluidic systems for malfunction detectors |
US3678725A (en) * | 1970-10-19 | 1972-07-25 | Kaiser Aluminium Chem Corp | Container forming apparatus |
US3765204A (en) * | 1970-05-08 | 1973-10-16 | Bergner R | Pressure head indicator for machine tools |
CN104338870A (en) * | 2014-10-31 | 2015-02-11 | 金盛紧固技术(安徽)有限责任公司 | Electric protection device used for hose clamp tape stamping production line |
-
1939
- 1939-07-14 GB GB20525/39A patent/GB531213A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3527073A (en) * | 1967-12-15 | 1970-09-08 | Ind Controls Inc | Fluidic systems for malfunction detectors |
US3765204A (en) * | 1970-05-08 | 1973-10-16 | Bergner R | Pressure head indicator for machine tools |
US3678725A (en) * | 1970-10-19 | 1972-07-25 | Kaiser Aluminium Chem Corp | Container forming apparatus |
CN104338870A (en) * | 2014-10-31 | 2015-02-11 | 金盛紧固技术(安徽)有限责任公司 | Electric protection device used for hose clamp tape stamping production line |
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