US3130613A - Overload protection device - Google Patents

Overload protection device Download PDF

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Publication number
US3130613A
US3130613A US88991A US8899161A US3130613A US 3130613 A US3130613 A US 3130613A US 88991 A US88991 A US 88991A US 8899161 A US8899161 A US 8899161A US 3130613 A US3130613 A US 3130613A
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US
United States
Prior art keywords
breaker
overload protection
pot
block
faces
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 - Lifetime
Application number
US88991A
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English (en)
Inventor
Metzger Hans Siegfried
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3130613A publication Critical patent/US3130613A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • 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
    • B30B15/282—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices using a breakage element
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
    • 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
    • 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
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P5/00—Emergency means for rendering ineffective a coupling conveying reciprocating movement if the motion of the driven part is prematurely resisted
    • F16P5/005—Overload protection by energy absorbing components, e.g. breaker blocks, shear sections

Definitions

  • the present invention relates broadly to an overload protection device having an interchangeable breaker block located between parts of machines which are loaded by opposing pressure-forces.
  • this invention relates to a breaker block construction located between the screw-downs and the checks in rolling mills.
  • breaker blocks By the provision of such breaker blocks the rolls, the bearings, and last but not least the housing of a rolling mill are to be protected against damages which can result from excessive rolling pressure.
  • a still further object of the invention is to provide an overload protection device of the aforementioned type which has the lowest possible inherent resiliency.
  • the breaker block should have the shape of a pot.
  • the opposing pressure forces are introduced both into the rim and into the pot-bottom which should have as much resistance to bending as possible.
  • the breaking point cross-section is provided for in the wall of the pot. This particular shape not only saves space but has the advantage, due to the circular or annular shape of the breaking cross-section, of facilitating the subjecting of the steel-pot to a most effective heat treatment.
  • the breaking cross-section which is distributed over a relatively wide circumference, can be highly tempered and therefore, receive a uniform grain.
  • the machine parts with which the breaker block is associated are illustrated as constituting an adjusting screw 1 supported by a cross frame or transverse 2 of a rolling mill housing and an upper chock 3 of a mill stand.
  • chock 3 will have to rise in order to relieve any force on the rolls, not shown.
  • the rolling pressure is directed upwardly from the chock via an axially divided or split supporting ring 4 into the outwardly directed flange or rim 5a of a breaker block 5 of pot-shape form.
  • the counter or what could be downwardly directed pressure force is exerted on the bottom 5b of the pot 5 via an intermediate piece or block 6.
  • the upwardly directed force passes from ring 4 through the pot 5 and block 6 into the end face 1a of the adjusting screw 1.
  • the end face In is shaped as a spherical socket, whereas the upper pressure transmitting surface 6a of the intermediate block 6 is likewise of spherical shape. This shaping of these two contacting faces ac commodates possible tilting movements of the chock 3 during roll deflection.
  • the bottom 51) of the pot is very thick so as to have as high resistance to bending as possible.
  • a central recess or cavity 7 is formed in the upper surface of the bottom 5b.
  • This recess or cavity is circular in plan so that the pressure transferring surface or contact area between the flat bottom of the intermediate piece or block 6 and the upper face of bottom 5! of the breaker pot 5 is reduced to a wide circular ring or annular contact surface or area 5e.
  • the wall of the breaker pot 5 provides the breaking point cross-section and to assure this an internal annular groove 5d is formed in this Wall to provide the breaking point cross-section at 50. Due to the fact that the pressure forces exerted at the areas or surfaces indicated by the arrows overlap, that is, the top of the supporting ring 4 bears against or attacks the undersurface of the flange or rim 5a While the adjusting screw 1 via the block 6 exerts pressure on the annular contact surface 5e of the bottom 5b of the breaker pot, only tension stresses are created in the wall of the pot particularly at the breaking point crosssection 50.
  • the respective pressure contact areas are both annular or of ring shape With their points of application lying in vertically displaced planes and one contact area being radially outward to the other.
  • This relationship provides the overlapping of the pressure forces so that tension stresses are created in the wall of the breaking pot.
  • the breaker block of this invention contrary to known prior art arrangements, does not establish any bending or shearing stresses in the breaker block.
  • the bottom 51) with part of the wall of the breaker pot 5 breaks at the breaking point cross-section 5c.
  • the now separated upper and lower parts of the breaker pot can be easily removed, after the parts of the bipartite or split supporting ring 4 are taken away laterally.
  • the adjusting screw 1 need not be moved up.
  • a pre-condition is, that the intermediate piece 6 or the space between the bottom and the chock 3 is high enough.
  • the parts of the supporting ring 4 are inserted again between the rim 5a of the breaker pot and the chock'3.
  • a centering recess 3a is provided in the upper surface of the chock 3;
  • a breaker block including a body member having spaced pressure receiving faces and a portion extending therebetween, said faces being disposed in parallel planes spaced axially of the line of application of force, and one face being spaced radially of the other whereby when said faces are subjected to opposing pressure forces the portion of the breaker block between said faces is subjected to tension stress.
  • An overload protection arrangement for interposition between machine elements subjected to opposing pressure forces comprising a body member including abend resistant bottom, a wall structure and a flange extending outwardly from said wall structure in spaced relationship to the bottom, said bottom having a thickness in excess of the thickness of the flange, a load receiving member within the body and bearing against the inner surface of said bottom and a load transmitting member bearing against the undersurface of said flange, whereby when said body is subjected to opposing loads tension stresses are created in said wall structure.
  • An overload protection arrangement as claimed in claim 2 and said wall structure having an internal groove at a location between said bottom and said flange to define a breaking point cross-section.
  • a breaker block construction for interposition between machine parts subjected to load, particularly between an adjusting screw and a roll chock in a rolling mill said breaker block comprising a body member including a bottom and atwall structure, a flange extending outwardly of the wall structure and having a surface parallel to and spaced from said bottom, said bottom being thicker than said flange and said wall structure, the inner surface of the bottom and the undersurface of said flange defining pressure receiving contact areas respectively spaced axially of the lines of transmission of pressure forces with one area being radially spaced from the other by the thickness of said wall structure so that upon application of forces opposing to said areas said wall structure is subjected to tension.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US88991A 1960-02-12 1961-02-13 Overload protection device Expired - Lifetime US3130613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM44304A DE1101328B (de) 1960-02-12 1960-02-12 UEberlastsicherung mit einem auswechselbaren Brechglied zwischen auf Druck belasteten Maschinenteilen

Publications (1)

Publication Number Publication Date
US3130613A true US3130613A (en) 1964-04-28

Family

ID=7304932

Family Applications (1)

Application Number Title Priority Date Filing Date
US88991A Expired - Lifetime US3130613A (en) 1960-02-12 1961-02-13 Overload protection device

Country Status (6)

Country Link
US (1) US3130613A (en:Method)
BE (1) BE600064A (en:Method)
DE (1) DE1101328B (en:Method)
FR (1) FR1280295A (en:Method)
GB (1) GB955718A (en:Method)
LU (1) LU39763A1 (en:Method)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2288796C2 (ru) * 2005-01-31 2006-12-10 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Предохранительное устройство клети прокатного или трубосварочного станов
FR3003611A1 (fr) * 2013-03-25 2014-09-26 Peugeot Citroen Automobiles Sa Clavette destinee a etre placee entre le bati superieur d'une presse et une lame de decoupage ou tombage d'une piece en tole

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269491B (de) * 1963-12-21 1968-05-30 Karlsruhe Augsburg Iweka UEberlastsicherung fuer Pressenstoessel
DE2454036B2 (de) * 1974-11-12 1977-09-01 Siemens AG, 1000 Berlin und 8000 München Axiale gelenkspindelabstuetzung fuer ein walzwerk mit zwillingsantrieb
DE2935083C2 (de) * 1979-08-28 1982-04-22 Mannesmann AG, 4000 Düsseldorf Überlastsicherung für Walzwerke
DE2935240C2 (de) * 1979-08-30 1982-11-18 Mannesmann AG, 4000 Düsseldorf Mechanische Überlastsicherung für Walzwerke, Pressen, Schmiedemaschinen und dgl..
US4830347A (en) * 1983-05-23 1989-05-16 Marathon Oil Company Assembly for and a method of absorbing impact shock loads
DE3341141A1 (de) * 1983-11-14 1985-05-23 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Wellenkupplung
ES2686989T3 (es) * 2015-12-14 2018-10-23 Nitrogas, S.A.U. Dispositivo hidráulico de actuación para una prensa

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1884055A (en) * 1929-03-27 1932-10-25 Vaughn Machinery Co Mill construction
US2612798A (en) * 1948-10-28 1952-10-07 British Iron Steel Research Breaker block for rolling mills

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1884055A (en) * 1929-03-27 1932-10-25 Vaughn Machinery Co Mill construction
US2612798A (en) * 1948-10-28 1952-10-07 British Iron Steel Research Breaker block for rolling mills

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2288796C2 (ru) * 2005-01-31 2006-12-10 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Предохранительное устройство клети прокатного или трубосварочного станов
FR3003611A1 (fr) * 2013-03-25 2014-09-26 Peugeot Citroen Automobiles Sa Clavette destinee a etre placee entre le bati superieur d'une presse et une lame de decoupage ou tombage d'une piece en tole

Also Published As

Publication number Publication date
GB955718A (en) 1964-04-22
DE1101328B (de) 1961-03-09
FR1280295A (fr) 1961-12-29
BE600064A (fr) 1961-08-10
LU39763A1 (en:Method) 1961-04-10

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