EP0025394B2 - Cylindre composite de compactage - Google Patents

Cylindre composite de compactage Download PDF

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Publication number
EP0025394B2
EP0025394B2 EP80401261A EP80401261A EP0025394B2 EP 0025394 B2 EP0025394 B2 EP 0025394B2 EP 80401261 A EP80401261 A EP 80401261A EP 80401261 A EP80401261 A EP 80401261A EP 0025394 B2 EP0025394 B2 EP 0025394B2
Authority
EP
European Patent Office
Prior art keywords
composite
shaft
case
outer layer
shrinking
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
EP80401261A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0025394B1 (fr
EP0025394A1 (fr
Inventor
Jean-Claude Werquin
Jean Quichon
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.)
USINOR SA
Original Assignee
Union Siderurgique du Nord et de lEst de France SA USINOR
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9229465&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0025394(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical Union Siderurgique du Nord et de lEst de France SA USINOR
Priority to AT80401261T priority Critical patent/ATE6230T1/de
Publication of EP0025394A1 publication Critical patent/EP0025394A1/fr
Publication of EP0025394B1 publication Critical patent/EP0025394B1/fr
Application granted granted Critical
Publication of EP0025394B2 publication Critical patent/EP0025394B2/fr
Expired 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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
    • B30B11/165—Roll constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/10—Roughness of roll surface

Definitions

  • the present invention relates to cylinders used in particular in compacting machines or similar applications.
  • the cells provided at the periphery of the cylinders have an essential role in the quality and regularity of compaction. Their excessive wear leads to a poor distribution of pressures and parasitic sliding which results in mechanical vibrations detrimental to the good behavior of the bearings. It is therefore essential that these cells have good strength and therefore that the cylinder tables themselves have excellent resistance.
  • these cylinders are produced in composite form and consist of a shaft and a hooped ring.
  • Such a design is economical because it allows the replacement of the only worn part, that is to say of the hoop, the shaft being able on the other hand to be reused indefinitely.
  • the hooping leads to the tangential tensile stress of the ring being put so that notches can form from the cracks of thermal origin and lead to the breakage of the hoop.
  • the structure of the envelope previously defined makes it possible to solve the problems of tangential tensile stress which appear during hooping and lead to notches which are formed from the cracks of thermal origin generated on the external surface of the hoop.
  • the compression preload of the material A constituting the outer layer of the envelope makes it possible to compensate and beyond the tensile stress which will be generated during hooping of the composite envelope on the shaft and thus cancel the tendency to notch.
  • FIG. single diagrammatically represents a cylinder according to the invention.
  • a composite cylinder comprising a central shaft 1 on which is wrapped an envelope 2 itself constituted by two layers 3, 4 of materials A and B.
  • the layer 3 has a thickness greater than 25 mm, the layer 4 a thickness greater than 35 mm, the thickness of the entire envelope being between 60 and 150 mm.
  • the coefficients of expansion of the materials A are between 11.7 and 12.7 10 -6 mm / mm ° C.
  • the choice of carbon content determines the quantity of carbide present in the structure of material A and is therefore conditioned by the intensity of the abrasion mechanisms involved when the cylinder is used. Furthermore, the choice of chromium content is conditioned by the intensity of the corrosion mechanisms and by the adaptation of the expansion coefficients of the two metals. Generally the coefficient of expansion decreases when the chromium content increases. The maximum chromium content is therefore limited by the appearance of residual austenite which has the double disadvantage of reducing the resistance to wear and increasing the coefficient of expansion. The maximum value of the chromium content also depends on the carbon content. The latter is limited to 3.5 so as to avoid hypereutectic structures which have greater fragility.
  • the coefficients of expansion of the materials B are then between 13.5 and 14.2 10 -6 mm / mm ° C, significantly higher than those of materials A.
  • this bimetallic envelope is put in compression preload and the pairs of materials A and B are chosen so that the value of this compression preload is at least equal to the tensile stress generated in the envelope during hooping on the shaft 1. This tensile stress is thus canceled so that the holding of material constituting the outer layer is significantly improved.
  • this material a metal composition relatively rich in carbide which provides a particularly high resistance to abrasion, the chromium content being moreover sufficient to guarantee an excellent resistance with respect to the stresses of thermal origin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Glass Compositions (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
EP80401261A 1979-09-07 1980-09-04 Cylindre composite de compactage Expired EP0025394B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401261T ATE6230T1 (de) 1979-09-07 1980-09-04 Verbundwalze zum kompaktieren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7922444A FR2464741A1 (fr) 1979-09-07 1979-09-07 Cylindre composite de compactage
FR7922444 1979-09-07

Publications (3)

Publication Number Publication Date
EP0025394A1 EP0025394A1 (fr) 1981-03-18
EP0025394B1 EP0025394B1 (fr) 1984-02-15
EP0025394B2 true EP0025394B2 (fr) 1989-09-13

Family

ID=9229465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401261A Expired EP0025394B2 (fr) 1979-09-07 1980-09-04 Cylindre composite de compactage

Country Status (11)

Country Link
EP (1) EP0025394B2 (xx)
AT (1) ATE6230T1 (xx)
BE (1) BE885101A (xx)
CH (1) CH640177A5 (xx)
DE (1) DE3066603D1 (xx)
ES (1) ES8105582A1 (xx)
FR (1) FR2464741A1 (xx)
IT (1) IT1147774B (xx)
LU (1) LU82749A1 (xx)
MX (1) MX154296A (xx)
ZA (1) ZA805519B (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174186A1 (en) * 2021-02-15 2022-08-18 The Mosaic Company Compaction of potash into briquettes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU85578A1 (fr) * 1984-10-08 1986-06-11 Marichal Ketin & Cie Amenagement des dernieres cages finisseuses d'un train a bandes a chaud
FR2578768B1 (fr) * 1985-03-15 1988-05-06 C3F Comp Franc Forges Fond Frettes de rouleaux de coulee continue
DE9007179U1 (de) * 1990-06-28 1990-08-30 Maschinenfabrik Köppern GmbH & Co KG, 4320 Hattingen Eisenschwamm-Brikettpresse
KR20170133375A (ko) * 2015-03-04 2017-12-05 후지코 가부시키가이샤 브리켓 롤 및 그 제조방법
CN109534937B (zh) * 2018-10-26 2023-06-30 福建兵工装备有限公司 一种火药柱的压制装置及其压制火药柱的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946623B1 (de) * 1969-09-15 1971-06-24 Gontermann Peipers Gmbh Verwendung einer hochchromlegierten eisenlegierung als werk stoff fuer walzwerkswalzen
US3775820A (en) * 1972-07-05 1973-12-04 Kg Ind Inc Compacting roll structure and method
JPS5613539B2 (xx) * 1973-03-30 1981-03-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174186A1 (en) * 2021-02-15 2022-08-18 The Mosaic Company Compaction of potash into briquettes

Also Published As

Publication number Publication date
MX154296A (es) 1987-06-29
IT1147774B (it) 1986-11-26
ES495071A0 (es) 1981-06-16
DE3066603D1 (en) 1984-03-22
ATE6230T1 (de) 1984-03-15
EP0025394B1 (fr) 1984-02-15
ZA805519B (en) 1981-09-30
EP0025394A1 (fr) 1981-03-18
IT8068385A0 (it) 1980-09-05
CH640177A5 (fr) 1983-12-30
LU82749A1 (fr) 1980-12-15
FR2464741B1 (xx) 1983-06-24
FR2464741A1 (fr) 1981-03-20
BE885101A (fr) 1981-03-05
ES8105582A1 (es) 1981-06-16

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