GB1441237A - Apparatus for counterbalancing the weight of a ram and upper die of a press - Google Patents

Apparatus for counterbalancing the weight of a ram and upper die of a press

Info

Publication number
GB1441237A
GB1441237A GB698375A GB698375A GB1441237A GB 1441237 A GB1441237 A GB 1441237A GB 698375 A GB698375 A GB 698375A GB 698375 A GB698375 A GB 698375A GB 1441237 A GB1441237 A GB 1441237A
Authority
GB
United Kingdom
Prior art keywords
cylinder
operated
transducer
store
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
Application number
GB698375A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of GB1441237A publication Critical patent/GB1441237A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0064—Counterbalancing means for movable press elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1441237 Presses L SCHULER GmbH 19 Feb 1975 [7 March 1974] 6983/75 Addition to 1348627 Heading B5F [Also in Division G3] An apparatus for counterbalancing the ram and upper die of a press includes a pressurized gas cylinder as in Specification 1,348,627 and a device for maintaining the gas pressure continuously or frequently repeatedly adjusted to compensate for leakages and temperature changes. The device includes a transducer 9 to produce an electric signal in a comparator circuit proportional to the gas pressure in the cylinder 13 to adjust a store 11 to a signal corresponding to the required pressure for balance. A pair of valves 19, 20 control the supply and discharge to the cylinder 13 under the control of correcting elements 17, 18 operated by unbalance of the transducer signal and the store signal. The comparator circuit is in the form of a Wheatstone bridge with a first potentiometer 9 and slider 10 operated by the cylinder 13 and acting as the transducer. A second potentiometer 11 and slider 12 operated by a motor 14 acts as the store. A switch 16 connects the bridge diagonal to the correcting elements 17, 18 or the motor 14. The bridge has an amplifier 23 in its diagonal.
GB698375A 1974-03-07 1975-02-19 Apparatus for counterbalancing the weight of a ram and upper die of a press Expired GB1441237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742410899 DE2410899C2 (en) 1974-03-07 1974-03-07 Counterbalance control for the ram of a press

Publications (1)

Publication Number Publication Date
GB1441237A true GB1441237A (en) 1976-06-30

Family

ID=5909369

Family Applications (1)

Application Number Title Priority Date Filing Date
GB698375A Expired GB1441237A (en) 1974-03-07 1975-02-19 Apparatus for counterbalancing the weight of a ram and upper die of a press

Country Status (5)

Country Link
JP (1) JPS6159840B2 (en)
DE (1) DE2410899C2 (en)
FR (1) FR2263100B2 (en)
GB (1) GB1441237A (en)
IT (1) IT1046197B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2501275A1 (en) * 1975-01-15 1976-07-22 Schuler Gmbh L Press with hydraulic overload protection - has discharge valve and pressure measuring devices connected to hydraulic cushion

Also Published As

Publication number Publication date
JPS50121869A (en) 1975-09-25
IT1046197B (en) 1980-06-30
FR2263100A2 (en) 1975-10-03
DE2410899C2 (en) 1982-09-16
DE2410899A1 (en) 1975-09-18
JPS6159840B2 (en) 1986-12-18
FR2263100B2 (en) 1978-08-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee