US3874212A - Tube cold rolling method - Google Patents

Tube cold rolling method Download PDF

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Publication number
US3874212A
US3874212A US40362273A US3874212A US 3874212 A US3874212 A US 3874212A US 40362273 A US40362273 A US 40362273A US 3874212 A US3874212 A US 3874212A
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United States
Prior art keywords
tube
stands
stand
roll
cold rolling
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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
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Inventor
Vsevolod Vladimirovich Nosal
Vadim Anatolievich Verderevsky
Veniamin Izrailevic Sokolovsky
Vladimir Pavlovich Platov
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Vsevolod Vladimirovich Nosal
Vadim Anatolievich Verderevsky
Veniamin Izrailevic Sokolovsky
Vladimir Pavlovich Platov
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Priority claimed from US525146A external-priority patent/US2874212A/en
Priority to DE19732349757 priority Critical patent/DE2349757C3/de
Priority to US40362273 priority patent/US3874212A/en
Application filed by Vsevolod Vladimirovich Nosal, Vadim Anatolievich Verderevsky, Veniamin Izrailevic Sokolovsky, Vladimir Pavlovich Platov filed Critical Vsevolod Vladimirovich Nosal
Priority to FR7338861A priority patent/FR2249719B1/fr
Application granted granted Critical
Publication of US3874212A publication Critical patent/US3874212A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B21/00Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/005Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/43Conversion of monochrome picture signals to colour picture signals for colour picture display

Abstract

The method provides for tube reduction in rolls and sizing in rollers during reciprocating motion in opposite directions of roll and roller stands in a straightaway setup. Deformation of the tube metal in the above stands is effected alternately, only in their forward stroke.

Description

United States Patent Nosal et al. Apr. 1, 1975 TUBE COLD ROLLING METHOD [58] Field of Search 72/189, 208, 209, 214 [76] Inventors: Vsevolod Vladimirovich Nosal,

Leningradsky prospekt, 72, kv. 205; [56] References cued Vadim Anatolievich Verderevsky, UNITED STATES PATENTS Volgogradsky prospekt, 88, kv. 25, 2,161,065 6/1939 Krause 72/209 both of Moscow; Veniamin 3,030,835 4/1962 Krausc 72/209 lzrailevich Sokolovsky, ulitsa Mira,

36/7, kv. 73, Sverdlovsk; Vladi i Primary Examiner-Lowell A. Larson Pavlovich Platov, ulitsa Mikhailova,

22, korpus 2, kv. 9, Moscow, all of S RACT U.S.S.R. The method provides for tube reduction in rolls and sizing in rollers during reciprocating motion in oppolu] 1973 site directions of roll and roller stands in a straight- [21] Appl. No.: 403,622 away setup. Deformation of the tube metal in the above stands is effected alternately, only in their for- 52 U.S. Cl. 72/214, 72/209 Ward Stroke- [51] Int. Cl B2lb 21/00 1 Claim, 1 Drawing Figure TUBE COLD ROLLING METHOD The present invention relates to metal shaping by pressure and more exactly to tube cold rolling methods.

There are known methods of tube cold rolling on a taper plug by the passes of the working roll stand performing reciprocating motion from the motor through the crank and connecting-rod gear. Major deformation of tube metal in diameter and wall thickness is effected during the forward stroke of the stand, while the backward stroke of the stand is used to roll off backfins and partially finish the outer surface of the tube. The required quality of the tube is achieved through sizing and polishing sections of the passes whose length accounts for 2535 percent of the entire length of the pass spread. This results in a reduced length of roughing and reducing sections which naturally entails reduced feed rate of the billet with subsequently reduced productivity of the mill.

Tube rolling on taper plug impairs the quality of tube causing the corrugated inner surface and uneven wall thickness.

Another disadvantage of this method resides in axial compressive loads exerted on the tube billet during the backward stroke of the working stand, these loads being transmitted to the feed chuck impair operating conditions increase wear thereof.

Also known is tube cold rolling method wherein no rolling takes place during the backward stroke of the working stand as during this stroke the roll passes are parted without contacting the tube being rolled.

With this method, no axial load is exerted on the tube and the feed chuck during the backward stoke of the working stand, however all other disadvantages inherent in rolling by roll stand passes remain with this method as well.

There is a method of cold rolling of tubes on the cylindrical plug by two or more rollers with constantsection groove in tube cold rolling mills whose working stand reciprocates from the motor through the crank and connecting-rod gear. In this case the function of passes is performed by channel-shaped supporting strips along which the rollers are running with their trunnions.

These mills produce high-quality tubes both in terms of surface finish and wall thickness. However, due to low degree of reduction both in tube diameter and wall thickness these mills are relatively low in productive capacity. They are not devoid of the above disadvantage: during the backward stroke of the working stand the rollers squeeze the tube and generate axial compressive loads.

Methods are known combining tube rolling by rolls and rollers. With such method, roll and roller stands are positioned in a straight-away setup; the stands are reciprocated through the crank and connecting-rod gear and similtaneously perform forward and backward strokes. The tube is rolled simultaneously by two stands (in roll stand on taper plug, in roller standon cylindrical one) and due to this the roller stand hinders the longitudinal displacement of the tube being rolled in t An attempt to eliminate this disadvantage by producing sectional rollers mounted on intermediate bronze bushes or bearings failed to yield any satisfactory result, because that reduced the rigidity of the roller stand while bronze bushes were quick to wear out even at slight squeeze of the tube.

The object of the present invention is to provide a tube cold rolling method allowing the productivity of the rolling process to be substantially increased and the quality of rolled tubes to be improved.

This object is achieved due to the provision of a tube cold rolling method including tube, reduction in rolls and sizing in rollers during reciprocating motion of roll and roller stands in a straightaway setup, wherein according to the invention the roll and roller stands perform the reciprocating motion in opposite directions and effect deformation of the tube metal alternately, only in their forward stroke.

Such realization of the method allows the productivity of rolling mills to be increased and the quality of rolled tubes to be improved.

A description will be given now of an actual embodiment of the tube cold rolling method with reference to the accompanying drawing giving a longitudinal elevational view of the roll and roller stands according to the invention.

Pursuant to the present invention, the method of cold rolling of tubes periodically delivered by the feed chuck to the deformation zone utilizes a roll stand 1 and roller stand 2 positioned in a straightaway setup and reciprocated in opposite directions. The roll stand 1 is reciprocated from a motor through a crank and connecting-rod gear, while the roller stand 2 is reciprocated from the roll stand 1 by means of rack-and-gear drive 3.

The roll stand 1 incorporates periodic passes 4. All profile sections of the passes 4 are roughing, which allows the tube 5 to be rolled in the passes of the roll stand 1 with maximum possible deformation of the tube 5 both in diameter and wall thickness, thus giving a substantial increase in productivity as compared with conventional roll stands. During this rolling process, sizing of the tube in diameter and wall thickness is effected in the roller stand 2 on a cylindrical plug 6 by rollers 7 with constant-section groove, the latter rollers running along straight supporting strips 8 and the tube rolling operations kept continuous. This makes possible to eliminate all intermediate technological operations needed after rolling tubes in stands to prepare tubes for rolling and sizing in roller stands, namely cutting, annealing, pickling, straightening, copper plating, phosphating and lubrication.

In the method disclosed herein the tube rolling process starts in the roll stand 1 on the taper plug 9 after bringing a tube billet to the deformation zone with the stand 1 moving forward, complete rough deformation (reduction) of the tube 5 in diameter and wall thickness taking place during this period. Further sizing of the tube in diameter and wall thickness, also rolling off buckle and surface polishing of the tube 5 are effected in' the roller stand 2 on the cylindrical plug 6 by rollers 7 with constant groove section. The taper plug 9 of the roll stand 1 and the cylindrical plug 6 of the roller stand 2 are screwed on a common bar 10.

In this method of rolling tubes 6 the roll and roller stands 1, 2 are moving in diametrically opposite directions with alternate relieving the passes of the roll stand l and rollers 7 of the roller stand 2 from contact with the metal of the tube being rolled. This takes place because movable wedges 12 located in their extreme rear positions under the pads 13 of the passes of the roll stand 1 and under the supporting strips 8 of the roller stand 2 are knocked out of their seats by means of stops. With the stands 1, 2 in the extreme forward positions, the wedges 12 are driven in because of the stops 1], and with the stands 1, 2 moving forward, the tube 5 is being rolled, assuring not simultaneous but alternate rolling of the tube 5 in each working stand 1, 2, thus yielding good quality tube surface with no metal stuck on the passes, rollers and plugs.

The above described tube cold rolling method utisaid stands and placing said tube coaxially with the stands; reciprocating said stands in opposite directions; reducing the tube when moving said stands towards each other; sizing said tube when moving the stands into opposite directions; and feeding periodically said tube along the axes of the stands.

Claims (1)

1. A method of cold rolling tubes by reducing and sizing them comprising the steps of: placing roll and roller stands coaxially; introducing a tube to be treated into said stands and placing said tube coaxially with the stands; reciprocating said stands in opposite directions; reducing the tube when moving said stands towards each other; sizing said tube when moving the stands into opposite directions; and feeding periodically said tube along the axes of the stands.
US40362273 1973-10-03 1973-10-04 Tube cold rolling method Expired - Lifetime US3874212A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19732349757 DE2349757C3 (en) 1973-10-03 1973-10-03
US40362273 US3874212A (en) 1973-10-03 1973-10-04 Tube cold rolling method
FR7338861A FR2249719B1 (en) 1973-10-03 1973-10-31

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US525146A US2874212A (en) 1955-07-29 1955-07-29 Generator of color images from monochrome television signals
DE19732349757 DE2349757C3 (en) 1973-10-03 1973-10-03
US40362273 US3874212A (en) 1973-10-03 1973-10-04 Tube cold rolling method
FR7338861A FR2249719B1 (en) 1973-10-03 1973-10-31

Publications (1)

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US3874212A true US3874212A (en) 1975-04-01

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US40362273 Expired - Lifetime US3874212A (en) 1973-10-03 1973-10-04 Tube cold rolling method

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US (1) US3874212A (en)
DE (1) DE2349757C3 (en)
FR (1) FR2249719B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203309A (en) * 1977-10-10 1980-05-20 Bushev Alexandr V Method of pilger rolling of tubes
US4255970A (en) * 1978-12-13 1981-03-17 Pottelberg Gaston C Van Barometer mechanism
US6360575B1 (en) * 1998-12-25 2002-03-26 Joint Stock Company “Chepetskiy Mechanical Plant” Calibration of an instrument for the cold-rolling of tubes
CN102548677A (en) * 2009-09-30 2012-07-04 住友金属工业株式会社 Retract mandrel mill and method for rolling tubing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826120A1 (en) * 1988-08-01 1990-02-08 Kabelmetal Ag Apparatus for the reciprocating rolling of tubes
DE19527795C2 (en) * 1995-07-19 1999-11-18 Mannesmann Ag Pipe cold rolling mill

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161065A (en) * 1936-12-02 1939-06-06 Frank R Krause Apparatus for reducing tubular blanks
US3030835A (en) * 1958-06-06 1962-04-24 Blaw Knox Co Tube rolling machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE155227C (en) *
DE495246C (en) * 1928-06-26 1930-04-04 Mannesmann Ag Process for glazing and sizing of pipes in pilger step rolling mills
DE604909C (en) * 1932-01-01 1934-11-02 Hirsch Process for rolling tubes on pilgrim step rolling mills
DE891532C (en) * 1943-05-04 1953-09-28 Wieland Werke Ag Process and device for the production of cold pilgrim metal hollow work pieces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161065A (en) * 1936-12-02 1939-06-06 Frank R Krause Apparatus for reducing tubular blanks
US3030835A (en) * 1958-06-06 1962-04-24 Blaw Knox Co Tube rolling machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203309A (en) * 1977-10-10 1980-05-20 Bushev Alexandr V Method of pilger rolling of tubes
US4255970A (en) * 1978-12-13 1981-03-17 Pottelberg Gaston C Van Barometer mechanism
US6360575B1 (en) * 1998-12-25 2002-03-26 Joint Stock Company “Chepetskiy Mechanical Plant” Calibration of an instrument for the cold-rolling of tubes
CN102548677A (en) * 2009-09-30 2012-07-04 住友金属工业株式会社 Retract mandrel mill and method for rolling tubing
US20120174646A1 (en) * 2009-09-30 2012-07-12 Sumitomo Metal Industries, Ltd. Retract mandrel mill and method for rolling tube blank
EP2484458A1 (en) * 2009-09-30 2012-08-08 Sumitomo Metal Industries, Ltd. Retract mandrel mill and method for rolling tubing
EP2484458A4 (en) * 2009-09-30 2013-06-05 Nippon Steel & Sumitomo Metal Corp Retract mandrel mill and method for rolling tubing
US8490450B2 (en) * 2009-09-30 2013-07-23 Nippon Steel & Sumitomo Metal Corporation Retract mandrel mill and method for rolling tube blank
CN102548677B (en) * 2009-09-30 2014-05-14 新日铁住金株式会社 Retract mandrel mill and method for rolling tubing

Also Published As

Publication number Publication date
DE2349757C3 (en) 1981-07-23
DE2349757B2 (en) 1980-11-20
DE2349757A1 (en) 1975-04-17
FR2249719A1 (en) 1975-05-30
FR2249719B1 (en) 1976-11-19

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