GB1436531A - Press having a device for preventing uncontrolled load relief in a frame and drive system of the press - Google Patents

Press having a device for preventing uncontrolled load relief in a frame and drive system of the press

Info

Publication number
GB1436531A
GB1436531A GB4547873A GB4547873A GB1436531A GB 1436531 A GB1436531 A GB 1436531A GB 4547873 A GB4547873 A GB 4547873A GB 4547873 A GB4547873 A GB 4547873A GB 1436531 A GB1436531 A GB 1436531A
Authority
GB
United Kingdom
Prior art keywords
liquid
press
flow
chamber
chambers
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
GB4547873A
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
Priority claimed from DE19722248024 external-priority patent/DE2248024C3/en
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of GB1436531A publication Critical patent/GB1436531A/en
Expired legal-status Critical Current

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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/002—Drive of the tools
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/20—Applications of drives for reducing noise or wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Control Of Presses (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Press Drives And Press Lines (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Punching Or Piercing (AREA)
  • Control Of Cutting Processes (AREA)

Abstract

1436531 Shearing; punching L SCHULER GmbH 28 Sept 1973 [29 Sept 1972] 45478/73 Heading B3W [Also in Division F2] A press has an hydraulic damper device, for preventing uncontrolled recoil of the press structure at the moment when a press tool breaks through a workpiece, comprising a cylinder and a piston connected, one to the frame and one to the ram of the press, the piston dividing the cylinder into two liquid-filled chambers normally interconnected to allow flow between the chambers but with means for interrupting the flow and means providing an alternative, throttled liquid path during such interruption. As shown, a pair of pistons 18, each connected to the ram move in cylinders 21 during a working stroke each causing liquid to flow from a chamber 20 into chamber 24 of adjacent cylinder 22, a floating piston 23 to rise and liquid to return from chamber 25 to chamber 19. At a point in the stroke predetermined by adjustment of a stop 28 this liquid exchange stops and liquid is forced to flow through line 11 throttled at 12. Liquid is returned to chambers 25 via a non-return valve by-passing a prepressuring valve 27. A relief valve 26 and accumulator 14 maintain an acceptable pressure level. The period during which the throttles function may be varied by means of shut-off valves 10 actuated by cams 16 on a shaft forming part of the press drive. In a simplified embodiment, Fig. 1 (not shown), the cylinders 22 are omitted and the check valves 10 are located in lines normally allowing liquid flow between the upper and lower chambers of the main cylinders.
GB4547873A 1972-09-29 1973-09-28 Press having a device for preventing uncontrolled load relief in a frame and drive system of the press Expired GB1436531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722248024 DE2248024C3 (en) 1972-09-29 Cutting impact damping device on cutting presses

Publications (1)

Publication Number Publication Date
GB1436531A true GB1436531A (en) 1976-05-19

Family

ID=5857861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4547873A Expired GB1436531A (en) 1972-09-29 1973-09-28 Press having a device for preventing uncontrolled load relief in a frame and drive system of the press

Country Status (5)

Country Link
JP (1) JPS4971580A (en)
CH (1) CH554237A (en)
FR (1) FR2201183A1 (en)
GB (1) GB1436531A (en)
IT (1) IT993389B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461854A1 (en) * 1979-07-17 1981-02-06 Profil Verbindungstechnik Gmbh SHOCK ABSORBER TO REDUCE THE NOISE OF MACHINES COMPRISING COMBINED MOVEMENTS
DK151593B (en) * 1978-10-10 1987-12-14 Sallander Hakan METHOD AND APPARATUS FOR SILENCE OF PUNCHING MACHINES.
WO2011079333A3 (en) * 2009-12-17 2011-10-13 Trumpf Maschinen Austria Gmbh & Co. Kg. Drive device for a bending press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808091A1 (en) * 1978-02-24 1979-08-30 Moog Gmbh DEVICE FOR DAMPING THE CUTTING EFFECT IN HYDRAULIC PRESSES
US4339975A (en) * 1980-10-20 1982-07-20 Gulf & Western Manufacturing Company Shock dampening system for presses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK151593B (en) * 1978-10-10 1987-12-14 Sallander Hakan METHOD AND APPARATUS FOR SILENCE OF PUNCHING MACHINES.
FR2461854A1 (en) * 1979-07-17 1981-02-06 Profil Verbindungstechnik Gmbh SHOCK ABSORBER TO REDUCE THE NOISE OF MACHINES COMPRISING COMBINED MOVEMENTS
WO2011079333A3 (en) * 2009-12-17 2011-10-13 Trumpf Maschinen Austria Gmbh & Co. Kg. Drive device for a bending press
US9688041B2 (en) 2009-12-17 2017-06-27 Trumpf Maschinen Austria Gmbh & Co. Kg. Drive device for a bending press

Also Published As

Publication number Publication date
DE2248024A1 (en) 1974-04-04
CH554237A (en) 1974-09-30
JPS4971580A (en) 1974-07-10
DE2248024B2 (en) 1976-12-09
FR2201183A1 (en) 1974-04-26
IT993389B (en) 1975-09-30

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees