GB944780A - A new or improved hydraulic overload safety device - Google Patents

A new or improved hydraulic overload safety device

Info

Publication number
GB944780A
GB944780A GB2233562A GB2233562A GB944780A GB 944780 A GB944780 A GB 944780A GB 2233562 A GB2233562 A GB 2233562A GB 2233562 A GB2233562 A GB 2233562A GB 944780 A GB944780 A GB 944780A
Authority
GB
United Kingdom
Prior art keywords
cylinder
plunger
pressure
maintained
face
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
GB2233562A
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.)
MASSEY SCHLATTER AG
Original Assignee
MASSEY SCHLATTER AG
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 MASSEY SCHLATTER AG filed Critical MASSEY SCHLATTER AG
Publication of GB944780A publication Critical patent/GB944780A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0035—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height using an adjustable connection between the press drive means and the press slide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
    • B30B15/284—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices releasing fluid from a fluid chamber subjected to overload pressure
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • 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
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7734—Fluid opened valve requiring reset
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2142—Pitmans and connecting rods
    • Y10T74/2144—Yieldable
    • Y10T74/2148—Automatic release
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8719—With transmission yieldable on overload

Abstract

944,780. Rolling. MASSEY SCHLATTER A.G. June 8, 1962 [June 13, 1961; Feb. 2, 1962], No. 22335/62. Heading B3M. [Also in Division B5] An overload safety device comprises a component which is maintained in rigid relation to one roll of a rolling mill by means of internal hydraulic pressure, which is suddenly and quickly released when exceeded by an external force on the component proportional to or equal to the force between the two rolls of the rolling mill, opening a valve comprising the component and a coacting member against the internal pressure. The Figures show two embodiments used on presses. Oil pressure in a cylinder space 12 (Fig. 1), is maintained by a pump or accumulator at about 800 atmospheres. This pressure acts on a hollow plunger 3, sliding in a cylinder 2 and pulls on a spindle 5 screwed into plunger 3, so that a head 8 of the plunger seats on an upper face 9 of the cylinder 2. When the force on face 21 of the plunger 3, resulting from the pressing operation, is sufficient, the plunger is forced up, breaking the seal between head 8 and face 9, and the oil enters a reservoir 23 through a gap 14. On removal of the oil pressure supplied to space 12, a small air pressure maintained through a pipe 24 restores the status quo. The plunger is adjustable relative to the cylinder by rotating the spindle 5 through a gear train comprising pinions 17, 19 and teeth 16 on the head 8. High oil pressure in a cavity 25 helps to maintain plunger 3 rigid relative to cylinder 2 during pressing &c. In an alternative embodiment (Fig. 3), a plunger 3<SP>1</SP> is rigidly connected to a carriage 1<SP>1</SP> of a press in which a hollow cylinder 2<SP>1</SP> slides. Oil pressure is maintained in a cylinder space 12<SP>1</SP> by a pump 35 through a bore 34, until pressure on face 211 forces open the seal between a conical surface 32 of head 8<SP>1</SP> of the piston and face 9<SP>1</SP> of a bushing 6<SP>1</SP> on the cylinder. The device may be reset by a weak spring 42 as shown, or reservoir 23<SP>1</SP> may be sealed by an annular plate 45 and a small air pressure maintained therein, tending to depress cylinder 2<SP>1</SP> after the oil pressure is removed.
GB2233562A 1961-06-13 1962-06-08 A new or improved hydraulic overload safety device Expired GB944780A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH688161A CH386783A (en) 1961-06-13 1961-06-13 Hydraulic overload protection device
CH127362A CH394724A (en) 1961-06-13 1962-02-02 Hydraulic overload protection device

Publications (1)

Publication Number Publication Date
GB944780A true GB944780A (en) 1963-12-18

Family

ID=25687173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2233562A Expired GB944780A (en) 1961-06-13 1962-06-08 A new or improved hydraulic overload safety device

Country Status (3)

Country Link
US (1) US3190141A (en)
CH (2) CH386783A (en)
GB (1) GB944780A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112178003A (en) * 2020-09-16 2021-01-05 马鞍山钢铁股份有限公司 Temper mill roller cylinder working roll locking device and assembling method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2242067C3 (en) * 1972-08-26 1981-11-19 Fried. Krupp Gmbh, 4300 Essen Length-adjustable connecting rod for a press with hydraulic overload protection
US3951025A (en) * 1974-09-17 1976-04-20 Eastman Kodak Company Overload safety device
US4166415A (en) * 1978-04-21 1979-09-04 Gulf & Western Manufacturing Company Press having overload responsive slide shut height adjusting mechanism
DE10229276B4 (en) * 2002-06-28 2005-09-08 Schuler Pressen Gmbh & Co. Kg Device for overload protection in a press

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US903424A (en) * 1907-02-21 1908-11-10 Bliss Co Pressure-limiting device.
US2396815A (en) * 1942-11-05 1946-03-19 Sf Bowser & Co Inc By-pass valve mechanism
US2491279A (en) * 1947-06-25 1949-12-13 Dayton Rogers Mfg Co Safety overload pitman for power presses
US2616543A (en) * 1949-03-19 1952-11-04 Danly Mach Specialties Inc Safety assembly for power presses
US2983176A (en) * 1956-08-21 1961-05-09 Tayco Dev Stripper construction for a perforator
US2936055A (en) * 1956-10-03 1960-05-10 Verson Allsteel Press Co Overload protected mechanical press
US2937733A (en) * 1956-10-31 1960-05-24 Danly Mach Specialties Inc Overload relief assembly for power presses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112178003A (en) * 2020-09-16 2021-01-05 马鞍山钢铁股份有限公司 Temper mill roller cylinder working roll locking device and assembling method thereof

Also Published As

Publication number Publication date
CH386783A (en) 1965-01-15
US3190141A (en) 1965-06-22
CH394724A (en) 1965-06-30

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