US3842636A - Rolls driving gear for the stand of pipe cold-rolling mill - Google Patents

Rolls driving gear for the stand of pipe cold-rolling mill Download PDF

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Publication number
US3842636A
US3842636A US00418076A US41807673A US3842636A US 3842636 A US3842636 A US 3842636A US 00418076 A US00418076 A US 00418076A US 41807673 A US41807673 A US 41807673A US 3842636 A US3842636 A US 3842636A
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US
United States
Prior art keywords
rolls
stand
slide block
rolling
driving gear
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
US00418076A
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English (en)
Inventor
I Murash
A Shvedchenko
S Kozhevnikov
A Tkachenko
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Individual
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Individual
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 to FR7341116A priority Critical patent/FR2251382B1/fr
Priority to DE2357807A priority patent/DE2357807A1/de
Application filed by Individual filed Critical Individual
Priority to US00418076A priority patent/US3842636A/en
Application granted granted Critical
Publication of US3842636A publication Critical patent/US3842636A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand

Definitions

  • the present invention relates to mechanisms for pipe cold-rolling mills and more particularly to rolls driving gears for the stands of pipe cold-rolling mills.
  • a driving gear of rolls for the stand of the pipe cold-rolling mill comprising pinions set on necks of the rolls arranged in a mobile stand and tooth racks secured immovably on the housing of the mill.
  • the pinions In the reciprocating motion of the stand, the pinions, while rolling on the rack secured on the mill housing, impart reciprocating rotation to said rolls.
  • a drive of the rolls of the pipe coldrolling mill comprising a bar link one end of which is hinged to the crank set on the roll neck, the second one being hinged to the mill housing, and a rack secured on the stand so that it has a roller thereon fitting into the groove of the bar link with which it interacts.
  • the design of the driving gear of the rolls also fails to ensure completely required variations in the speed of the rolls rotation in the course of rolling, which impairs the quality of produced pipes.
  • An object of the present invention is to provide a driving gear of the rolls, simple in design and dependable in operation.
  • Another object of the invention is to provide a driving gear of the rolls, as would permit an angle of turn of up to 360 for said rolls.
  • Yet another object of the invention is to provide a driving gear of the rolls, as would help produce quality pipes.
  • a driving gear of the rolls of the stand of the pipe cold-rolling mill comprising cranks set on the necks of the rolls and hinged to amechanism designed to transmit to said cranks forces that effect the turn of the rolls.
  • the mechanism for transmitting to the cranks forces that effect the turn of the rolls is made as two crank and also hinged, with the other end each, to a slide block reciprocating parallel to the rolling axis in guides secured on the roll housing at a rate that helps equalize the speed of the rolls rotation and the rate of the metal creep in the deformation source during rollmg.
  • the present invention is realized as a driving gear of the rolls of the stand of the pipe cold-rolling mill, dependable in operation and simple in design, that permits to increase the angle of the rolls turn up to 360 as well as ensures a variable speed of the rolls rotation, equal to the rate of the metal creep in the source of deformation during rolling, which helps reduce the rolling force, improve the quality of pipes produced, increase the number of the double strokes of the mill stand per minute and raise the efficiency of the mill.
  • FIG. 1 shows a functional diagram of the pipe coldrolling mill equipped with the rolls driving gear embodied according to the invention
  • FIG. 2 shows a stand of the pipe cold-rolling mill embodied according to the invention, lateral view
  • FIG. 3 is ditto, buttend view
  • FIG. 4 shows the diagram of positions of the rolls driving gear, with 13 different positions of the latter, each corresponding to one stand stroke.
  • the rotation of rolls 5 is carried out by means of a rolls driving gear 6 made according to the invention. From the main reducer 2, rotation is transmitted to the reducer 7 of a cam mechanism 8 and a traversing mechanism 9. In the extreme backward position of the working stand, there is a feed of a pipe 10, its turn being effected when said working stand is in its extreme forward position.
  • a mechanism 11 serves for setting and withdrawing a rod 12 designed to fix a mandrel (not shown).
  • the rolls driving gear 6 has two connecting rods 13 (FIGS. 2 and 3) hinged, with one end each, to cranks 14 set on necks 15 of said rolls 5, and with the other ends also hinged to aslide block 16 travelling within guides 17 of a base 18 of the stand 4.
  • number I stands for a position of the rolls, that corresponds to the extreme forward position of the stand, II for the middle position of the stand, III for the extreme backward position of the stand, IV for the plane of displacement of the axis 0-,-0 of the upper roll 5, V for the plane of displacement of the axis 0 0 of the slide block 16, and VI for the plane of displacement of the axis 0 0 of the lower roll.
  • the rolls driving gear functions as follows.
  • the slide block 16 is also imparted reciprocating dis placement.
  • the rate of displacement of the slide block 16 is smaller than that of the stand 4, and therefore forces develop in the connecting rods 13, under the action of which the rolls 5 make a turn and start reciprocating rotation.
  • Variations in the speed of rotation of said rolls 5 depend on variations in the speed of travelof the slide block 16.
  • the displacement of the slide block 16 can be effected e.g., with the aid of a cam mechanism 19 coupled with a main drive 20 of the stand via a reducer 21.
  • the cam profile should be such as to enable the lever 24, which interacts with the cam via the rollers 23, to impart the slide block 16, via the connecting rod 25, a motion at a speed corresponding to the rate of the metal creep within the deformation source in the course of rolling.
  • a driving gear of rolls of stand of a pipe coldrolling mill comprising: cranks set on necks of said rolls; a mechanism for imparting reciprocating motion to said stand, kinematically coupled with the main drive of said mill; connecting rods hinged, with one end each, to said cranks, a slide block hinged to the other ends of said connecting rods and adjusted for reciprocating motion parallel to the rolling axis during the reciprocating travel of said stand; guides for the reciprocating motion of said slide block, secured on the housing of said stand; a device kinematically coupled with the main drive of said mill for moving said slide block at a speed permitting the turn of said rolls with a circumferential speed equal to the rate of metal creep within a deformation source during rolling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)
US00418076A 1973-11-19 1973-11-21 Rolls driving gear for the stand of pipe cold-rolling mill Expired - Lifetime US3842636A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7341116A FR2251382B1 (de) 1973-11-19 1973-11-19
DE2357807A DE2357807A1 (de) 1973-11-19 1973-11-20 Antrieb fuer die walzen eines rohrkaltwalzgeruests
US00418076A US3842636A (en) 1973-11-19 1973-11-21 Rolls driving gear for the stand of pipe cold-rolling mill

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR7341116A FR2251382B1 (de) 1973-11-19 1973-11-19
DE2357807A DE2357807A1 (de) 1973-11-19 1973-11-20 Antrieb fuer die walzen eines rohrkaltwalzgeruests
US00418076A US3842636A (en) 1973-11-19 1973-11-21 Rolls driving gear for the stand of pipe cold-rolling mill

Publications (1)

Publication Number Publication Date
US3842636A true US3842636A (en) 1974-10-22

Family

ID=27185629

Family Applications (1)

Application Number Title Priority Date Filing Date
US00418076A Expired - Lifetime US3842636A (en) 1973-11-19 1973-11-21 Rolls driving gear for the stand of pipe cold-rolling mill

Country Status (3)

Country Link
US (1) US3842636A (de)
DE (1) DE2357807A1 (de)
FR (1) FR2251382B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10022801B1 (en) 2015-12-01 2018-07-17 Gregory Devaney Pipe bracing device for pipe machining apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379326A1 (fr) * 1977-02-03 1978-09-01 Vallourec Lorraine Escaut Laminoir a pas de pelerin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10022801B1 (en) 2015-12-01 2018-07-17 Gregory Devaney Pipe bracing device for pipe machining apparatus

Also Published As

Publication number Publication date
FR2251382A1 (de) 1975-06-13
DE2357807A1 (de) 1975-05-22
FR2251382B1 (de) 1976-11-19

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