US2519818A - Rolling mill with set elongation - Google Patents

Rolling mill with set elongation Download PDF

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Publication number
US2519818A
US2519818A US689359A US68935946A US2519818A US 2519818 A US2519818 A US 2519818A US 689359 A US689359 A US 689359A US 68935946 A US68935946 A US 68935946A US 2519818 A US2519818 A US 2519818A
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US
United States
Prior art keywords
mill
elongation
rolling mill
band
ratio
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
US689359A
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English (en)
Inventor
Blain Paul
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.)
ACIERIES ET FORGES DE FIRMINY SA
Acieries Et Forges Firminy
Original Assignee
Acieries Et Forges Firminy
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 Acieries Et Forges Firminy filed Critical Acieries Et Forges Firminy
Application granted granted Critical
Publication of US2519818A publication Critical patent/US2519818A/en
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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
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/56—Elongation control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams

Definitions

  • a rolling mill with a set elongation is a mill that allows the reduction in thickness of a band in a given ratio, consequently a stretching of the band in the same ratio whatever may be the thickness oi the band as it enters the rolls.
  • drawing set in which the band travels are located respectively fore and aft 0! the mill stand; each set contains a certain number of rollers that are interconnected by gearing arranged so that the peripheral speed of all the rollers of one set is the same; in addition, the two drawing sets are interconnected by a mechanical drive ensuring a fixed ratio between their respective speeds.
  • the rolled band that unrolls from a first winding drum, travels in the force drawing appliance, into the mill, then into the aft drawing appliance to roll up finally on the second winding drum; it cannot slip on the rollers of the first drawing set or on those of the second set, so there is necessarily an elongation in the mill in the ratio that there is between the peripheral speeds of the rollers of the first set and that of the second set and this is so whatever may be the thickness 01 the band going into the rolling mill.
  • My invention has for its object a mill with set elongation in which the closure of the rolls is regulated at each instant by the action of a contrivance for measuring the ratio of the speeds of the band as it enters and as it leaves the rolls.
  • the band can travel fore and aft of the rollstand on driving rollers that transmit their movement to a contrivance that controls the adjusting or the slackening of the mill depending on whether the relative speed of the rollers is below or above a fixed ratio.
  • Figs. 1 and 2 show diagrammatically the mill respectively in elevation and in plan view.
  • Figs. 3 and 4 show similar side and front views of the regulating contrivance.
  • the stand I of the rolling mill is furnished with a hydraulicadjusting jack 2; the band unrolls from the drum 3 to wind on to the drum 4; after rolling, the drums are driven respectively by motors 5 and 6, in such a way that the band is under tensile strain as it enters and as it leaves the rolls; the driving rollers I and 8 are drawn by the hand.
  • These rollers transmit their movement through gears a and ill to a contrivance Ii that closes a contact when the ratio of the peripheral speeds of the rollers l and 8 falls below 2 a given figure and opens this contact when the ratio exceeds this figure.
  • This contact is placed in a circuit comprising an electromotive force and an electro-magnet that controls a hydraulic relay putting the adjusting jacks in communication with high-pressure mains if the ratio oi. the speeds of the rollers is too low and with the exhaust if this ratio is too high.
  • the rolling pressure is fixed at an average 10 figure such that the band, whatever its thickness as it enters the rolls, undergoes in its travel through the mill the exact elongation for which the contrivance II is regulated.
  • the disc Ii is controlled by the roller on the inside I and the parallel disc I2 is controlled by the roller on the outside 8 (Figs. 3 and 4).
  • These two discs are placed opposite to each other with their planes parallel but with their axes l8 and H set back.
  • a small wheel it turns round an axis i8 hinged at II to a point midway on the line of the centres of the axes i3 and I l, and bears on the two plates that turn in opposite directions.
  • the axis It takes a position that depends only on the figure of the ratio of the speeds of the discs II and l2, 1. e.
  • a circuit connects a suitable E. M. F. 20, the contact i8'l9 andan electromagnet 2! that can attract a blade 22 attached to the ram 23 of a hydraulic distributor 24. In the position shown, taking the contact l8i9 as 0 open, the ram and the blade of the hydraulic distributor are, in their lower position, urged by the spring 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Metal Rolling (AREA)
US689359A 1946-02-23 1946-08-09 Rolling mill with set elongation Expired - Lifetime US2519818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2519818X 1946-02-23

Publications (1)

Publication Number Publication Date
US2519818A true US2519818A (en) 1950-08-22

Family

ID=9686074

Family Applications (1)

Application Number Title Priority Date Filing Date
US689359A Expired - Lifetime US2519818A (en) 1946-02-23 1946-08-09 Rolling mill with set elongation

Country Status (3)

Country Link
US (1) US2519818A (en)van)
BE (1) BE470809A (en)van)
GB (1) GB630989A (en)van)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183693A (en) * 1959-11-30 1965-05-18 Davy & United Eng Co Ltd Control system for temper rolling mills
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
US3889505A (en) * 1973-02-07 1975-06-17 Ungerer Irma Process and an apparatus for regulating the drive or deceleration of power driven or decelerated rollers in drawing and straightening installations
CN115069886A (zh) * 2022-07-14 2022-09-20 苏州科技大学 拉应力条件下的钛箔材电流/超声协同辅助辊弯成形方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968790A (en) * 1931-05-04 1934-07-31 Cold Metal Process Co Reduction of metallic bodies
US2051018A (en) * 1934-03-28 1936-08-11 Gen Electric Speed ratio indicating device
US2194078A (en) * 1936-12-09 1940-03-19 Oilgear Co Hold-down system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968790A (en) * 1931-05-04 1934-07-31 Cold Metal Process Co Reduction of metallic bodies
US2051018A (en) * 1934-03-28 1936-08-11 Gen Electric Speed ratio indicating device
US2194078A (en) * 1936-12-09 1940-03-19 Oilgear Co Hold-down system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183693A (en) * 1959-11-30 1965-05-18 Davy & United Eng Co Ltd Control system for temper rolling mills
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
US3889505A (en) * 1973-02-07 1975-06-17 Ungerer Irma Process and an apparatus for regulating the drive or deceleration of power driven or decelerated rollers in drawing and straightening installations
CN115069886A (zh) * 2022-07-14 2022-09-20 苏州科技大学 拉应力条件下的钛箔材电流/超声协同辅助辊弯成形方法

Also Published As

Publication number Publication date
GB630989A (en) 1949-10-25
BE470809A (en)van) 1947-02-28

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