US3862560A - Feed apparatus of tube cold rolling mill - Google Patents

Feed apparatus of tube cold rolling mill Download PDF

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Publication number
US3862560A
US3862560A US439829A US43982974A US3862560A US 3862560 A US3862560 A US 3862560A US 439829 A US439829 A US 439829A US 43982974 A US43982974 A US 43982974A US 3862560 A US3862560 A US 3862560A
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United States
Prior art keywords
tube
feed
rolled
roll stand
screws
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Expired - Lifetime
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US439829A
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English (en)
Inventor
Mark Izrailevich Grinshpun
Igor Iosifovich Dobkin
Gennady Fedorovich Kurenkov
Alexandr Vasilievich Bushev
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Priority to DE2401591A priority Critical patent/DE2401591C3/de
Priority to FR7402901A priority patent/FR2258906B1/fr
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Priority to US439829A priority patent/US3862560A/en
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Publication of US3862560A publication Critical patent/US3862560A/en
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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
    • B21B21/04—Pilgrim-step feeding mechanisms
    • B21B21/045—Pilgrim-step feeding mechanisms for reciprocating stands

Definitions

  • a feed apparatus has means for conversion of a uniform rotational motion into an intermittent forward movement whose input shaft is imparted a uniform rotational motion by a drive kinematically connected to the drive of a roll stand, and a feed device being imparted an intermittent forward motion by said conversion means through the output member thereof and transmitting this motion to a tube being rolled.
  • the feed apparatus is provided with a hydraulic cylinder constantly transmitting, through the piston, fluid pressure onto the feed device in the direction of feed of the tube being rolled thereby making it possible to increase the number of the roll stand double strokes per minute and to roll large-diameter tubes.
  • the present invention relates to mechanisms of tube cold rolling mills with a reciprocating roll stand and more particularly to mechanisms for feeding a tube being rolled into a deformation zone ofa tube cold-rolling mill.
  • An apparatus has previously been proposed for feeding the tube being rolled into the deformation zone of the tube cold rolling mill with a reciprocating roll stand set in motion by a drive, comprising a mechanism for conversion ofa uniform rotational motion into an intermittent forward movement, whose input shaft is continuously rotated from a drive kinematically connected to the roll stand drive and whose output member has an intermittent forward movement strictly constant in magnitude and independent of a load applied thereon, and feed means engaging the tube being rolled, coupled with the output member of said conversion mechanism and being imparted an intermittent forward motion by the latter (See Authors Certificate No. 137,095, the USSR).
  • the conversion mechanism of the feed apparatus includes a cam shaft which is continuously rotated from a drive kinematically connected to the roll stand drive and a differential bevel gear onto which two motions are transmitted simultaneously: a reverse rotational motion from a cam and a uniform rotational motion imparted by a gear keyed to the cam shaft.
  • the cam profile is so designed that the cam transmits a rotational motion in one direction onto the differential bevel gear through a rocker arm, the differential gear output shaft turns through a definite angle whereas with the rotational motion transmitted in the other direction, this output shaft does not rotate.
  • the differential gear output shaft is imparted an intermittent rotational motion which is then converted into an intermittent forward "movement by means of gear-nuts and screws which constitute an output member of the conversion mechanism and are threaded through said gear-nuts, the screw ends being connected on one side with the feed means enabling the screws to move progressively therewith.
  • the advantage of this apparatus consists in that, when the cam shaft is imparted a uniform rotational motion from the drive kinematically connected to the roll stand drive, feed of the tube being rolled is effected exactly at the movement required, with the roll stand in a definite position, the amount of feed being strictly determined independent of the roll stand double strokes per minute and the force applied which is most important for obtaining high quality tubing.
  • the principle object of the present invention is to provide such a feed apparatus for a tube cold rolling mill which will reliably operate in mills with an increased number of the roll stand double strokes per minute and also in rolling large-diameter tubes.
  • a feed apparatus for feeding a tube being rolled into the deformation zone of a tube cold rolling mill with a reciprocating roll stand operated by a drive, comprising means for conversion of a uniform rotational motion into an intermittent forward movement whose input shaft is imparted a uniform rotational motion from a drive kinematically connected to the roll stand drive and whose output member has an intermittent forward motion strictly constant in magnitude and independent of a load applied thereon, and a feed device engaging the tube being rolled and connected to the output member of said conversion mechanism, said member transmitting intermittent forward motion thereto.
  • the apparatus has a hydraulic cylinder continuously transmitting fluid pressure through its movable member onto the feed device in the direction of feed of the tube being rolled, thereby decreasing load on parts of the means for conversion of a uniform rotational. motion into an intermittent forward movement at the moment of feed of the tube being rolled.
  • the output member of the means for conversion of a uniform rotational motion into an intermittent forward movement is provided in the form of screws with their ends on one side coupled with the feed device and threaded through rotating nuts located from axial displacement, to make said screws hollow and to place pistons in the screw inner chambers, with their ends being fixedly secured on one side thus forming hydraulic cylinders, the pistons being provided with through passages along their entire length for supplying fluid into the inner chambers of the screws, the fluid pressure being continuously transmitted via the screws onto the feed device thereby decreasing load on the nuts and hence on other parts of the means for conversion of a uniform rotational motion into an intermittent forward movement at the moment of feed of the tube being rolled.
  • FIG. 1 illustrates a feed apparatus of a tube cold rolling mill made in accordance with the invention with a drive and a stationary frame;
  • FIG. 2 is a sectional view on the line IIII of FIG. 1;
  • FIG. 3 is a sectional view on the line IIIIlI of FIG. 2;
  • FIG. 4 is a version of the A assembly of the FIG. 1.
  • a stationary frame 1 (FIGS. 1, 2, 3) has the form of a closed triangle wherein on support rails 2 (FIG. 2) moves a roll stand 3 (FIGS. 2 and 3) reciprocated by a slider-crank mechanism 4 (FIGS. 2 and 1).
  • each roll having on one portionof its circumference inserted dies 6 (FIGS. 2, 3) with grooves 7 (FIG. 3) of varying cross-section along the roll circumference which grooves, with the roll stand in a working position approaching the extreme rear one in the rolling direction, form a closed circle corresponding to the diameter of a tube 8 being rolled (FIGS. 1, 2) whereas with the roll stand position approaching the extreme front one they form a closed circle corresponding to the diameter ofa finished tube 9.
  • the grooves 7 in the dies 6 form a circle of a greater diameter than that of the tube being rolled.
  • back-up rolls 10 (FIG. 2) which, in turn, roll along support plates 11 attached to the rails 2 mounted on mill screws 12 arranged in nuts 13 fastened to the stationary frame 1.
  • the screws have a drive 14 connected therewith via line shafts 15 (FIG. 3).
  • Bearing supports (not shown) of the work and backup rolls are mounted in a cage 16 (FIGS. 2 and 3) which is linked with connecting rods 17 (FIGS. 1 and 2) of the slider-crank mechanism 4. To impart a synchronous rotational motion to the work rolls, these have pinions (not shown) at their ends, the pinions being in mesh with racks (not shown) fixed on the frame 1.
  • a crankshaft 18 of the slider-crank mechanism 4 is mounted in bearings (not shown) on a bed plate 19 (FIGS. 2 and 3), whereupon is installed the frame 1, the crankshaft being driven through a reducing gear 20 (FIG. 1) and couplings 21 and 22 from an electric motor 23.
  • the movable support of the mandrel bar 32 is withdrawn by a chain drive (not shown) together with the bar and the mandrel in the direction opposite to that of rolling.
  • the feed apparatus 29 comprises means 33 for conversion of a continuous rotational movement into an intermittent forward movement having the cam shaft 28 whereupon are mounted a cam 34, a counter cam 34 and a pinion 36.
  • the cam 34 is followed by a roller 37 fastened to an arm 38a of a double-arm lever 38 whereas the counter cam is followed by a second roller 39 fastened to a second arm 38b of the double-arm lever 38.
  • the profiles of the cam 34 and that of the counter cam are so selected that the rollers 37 and 39 following them do not go out of continuous contact with the surfaces thereof while the lever 38 swings together with a shaft 40 whereon is mounted a planet carrier 41 with rotating thereon planet bevel wheels 42 of a differential bevel gear 43.
  • the intermittent rotational motion is converted into an intermittent forward movement.
  • screws 47 moving progressively and constituting the output member of the conversion means and also via gear-nuts 48 being imparted an intermittent rotational motion by the bevel gear 46 of the differential gear 43 through a shaft 49, change pinions 50 and 51 serving to vary the amount of feed, a shaft 52.
  • a gear 53, cam gears 54 and 55 which are brought in engagement and disengaged by a power cylinder 56 through a bearing clutch 57.
  • rotation of the nuts 48 is effected by means of a gear 58, the gear-nuts 48 being in engagement therewith.
  • the screws 47 are threaded through the gear-nuts 48, the screw ends on one side being connected with the feed device 30, and thus the screws move progressively in the direction of rolling.
  • the drive being taken from an individual electric motor 59 via a V-belt drive, a friction clutch-pulley 61 actuated and disengaged by a power cylinder 62 through a bearing clutch 63 and further via a shaft 64, a gear 65, the gear-nuts 48 rotated in the reverse direction, and the screws 47.
  • the second part of the feed apparatus 29 is the feed device 30 consisting of a housing 66 (FIG. 1) moving on guides (not shown) wherein is arranged a stop or tube clamps (not shown) engaging the tube 8 being rolled.
  • the feed device is imparted an intermittent forward movement by the screws 47 coupled therewith through the housing 66.
  • a hydraulic cylinder 67 is connected by a hydraulic drive 68 with a fluid delivery source (not shown) wherefrom fluid pressure is constantly transmitted via a piston rod 69 onto the feed device over the entire length of its travel in the rolling direction due to which the screws 47, the gear-nuts 48 and all the components of the conversion means 33 are relieved from some portion of the load acting thereupon at the moment of feed as the tube 8 is being stripped off the mandrel 31.
  • FIG. 4 shows a version of the assembly A (FIG. 1) of the feed apparatus 29 wherein the function of the hydraulic cyclinder 67 is taken up by the screws 47 being the output member of the means 33 for conversion of a uniform rotational motion into an intermittent forward movement, and provided with inner chambers wherein pistons 70 are placed with their ends fastened on one side to a support 71.
  • the pistons 70 have through passages 72 extending along their entire length through which fluid under pressure is constantly'supplied into the chambers of the screws'47 by hydraulic drives 73 from a fluid delivery source (not shown).
  • the screws 47 are mounted in the gear-nuts 48, their ends being connected on one side to the feed device 30. Since fluid pressure is constantly transmitted through the screws 47 to the feed device, the load on the gearnuts 48 decreases and consequently, there occurs a reduction in the load acting on other parts of the means for conversion of a uniform rotational motion into an intermittent forward movement at the moment of feed of the tube 8 being rolled.
  • Such design of the feed apparatus simplifies its construction and enables fluid pressure to be transmitted via the screws 47 arranged symmetrically to the axis of rolling 0.
  • the feed apparatus operates as follows.
  • the inserted dies 6 of the work rolls roll over the tube 8 fited on the mandrel 31 and entered into the deformation zone, with their varying cross-section grooves 7 so that, during the stand travel the tube is reduced from its initial diameter to that of the finished tube due to reduction both on its diameter and wall thickness. In this way, the tube being rolled elongates and exits in the form of the finished tube 9 on the side of the slider-crank mechanism 4.
  • a force arising due to reduction of the tube 8 is transmitted from the work rolls 5 through the back-up rolls 10 to the plates 11 along which the rolls 10 roll. Then, this force is transmitted, through the support rails 2 wherein are secured the plates 11, the mill screws 12, the nuts 13, to the stationary closed-type frame 1.
  • the outside diameter of the finished tube 9 can be controlled in the process of rolling by means of bringing the work rolls 5 close or apart together with the back-up rolls 10, the plates 11 and the support rails 2 relative to the axis of rolling 00 using the mill screws 12 operated from the drive 14 through the line shafts 15.
  • the inside diameter of the finished tube is controlled by the movement of the tapered mandrel 31 in the axial direction.
  • the feed apparatus 29 effects, by means of the feed device 30 engaging the tube 8 via a stop or clamps, stripping of the tube off the tapered mandrel 31, and feeds it by a predetermined distance in the rolling direction]
  • the driven shaft 28 of the feed apparatus 29 is kinematically connected to the roll stand drive so that the electric motor 23 transmits through a reducing gear 20, the couplings 25 and 26, the reducing gear 24 and the coupling 27, such kind of rotation onto the driven shaft 28 that it makes one revolution during the time in the course of which the roll stand makes one double stroke.
  • the shaft 28 is coupled with the reducing gear 24 through the coupling 27 in such a way that the cam 34 mounted on the shaft 28 swings at the moment of feed in such a direction which coincides with that of rotation of the gear 46 of the differential gear 43 which rotation being transmitted through the shaft 49, change gears 50 and 51, the shaft 52, the gear 53, cam gears 54 and 55 actuated by the cylinder 56 via the clutch 57, to the gear-nuts 48.
  • the gear-nuts 48 by turning through a definite angle, displace the screws 47 which together with the feed device 30 will advance in the direction of rolling and accomplish feed of the tube 8 being rolled.
  • the feed device 30 moves intermittently until it reaches its extreme front position, in the direction of rolling, specified by the design the tube cold rolling mill.
  • the electric motor 23 is also switched off, and the roll stand 3, upon making several strokes on the tube 8 without feeding it to facilitate withdrawing the mandrel 31 thereout, also stops.
  • the mandrel 31 together with the bar 32 is retracted by a separate chain drive.
  • the feed device 30 and the mandrel 31 are retracted by a distance which enables a next tube to be interposed between the tail end face of the tube 8 being in the dies 6 and the feed device 30.
  • the mandrel 31 is entered therethrough into the rolled tube being in the dies 6.
  • the hydraulic cylinder 56 actuates cam gears 54 and 55.
  • the friction clutch 61 is disengaged by the hydraulic cylinder 62.
  • the hydraulic cylinder 67 (FIG. 1) or the inner chambers of the screws 47 (FIG. 4) are supplied with fluid under pressure via the hydraulic piping 68 or the pistons 70, respectively.
  • the main drive motor 23 is switched on and the process of rolling begins anew.
  • a feed apparatus for feeding a tube being rolled into the deformation zone of a tube cold rolling mill with a reciprocating roll stand operated from a drive comprising: means for conversion of a uniform rotational motion into intermittent forward movement and having an input shaft to which the uniform rotational motion is transmitted by a drive kinematically connected to said drive of the roll stand so that said input shaft makes one revolution during the time in the course of which said roll stand makes one double stroke, and an output member having an intermittent forward motion constant in magnitude and independent of a load applied thereon in the direction of said deformation zone at the end of the backward, to the direction of rolling, travel of said roll stand; a feed device coupled with said output member and being imparted said intermittent forward motion therefrom, said device having means to feed the tube being rolled into the deformation zone; a hydraulic cylinder connected to a fluid delivery source to transmit fluid pressure into said feed device in the direction of said deformation zone and hence to decrease load on the parts of said conversion means at the moment of feed of the tube being rolled.
  • a feed apparatus as of claim 1 characterized in that said output member of the means for conversion of a uniform rotational motion into an intermittent forward movement is provided in the form of screws threaded through nuts located from axial displacement with their ends on one side being connected to said feed device, said screws being made hollow and their inner chambers accommodating pistons with their ends fixedly secured on one side thus forming hydraulic cylinders, said pistons having along their entire length through passages being connected to the fluid delivery source through which passages fluid is being supplied into said inner chambers of the screws such that the fluid pressure is constantly transmitted through said screws onto said feed device thereby decreasing load on said nuts and hence on other parts of said means for conversion ofa uniform rotational motion into an intermittent forward movement at the moment of feed of the tube being rolled.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
US439829A 1974-01-14 1974-02-05 Feed apparatus of tube cold rolling mill Expired - Lifetime US3862560A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE2401591A DE2401591C3 (de) 1974-01-14 1974-01-14 Rohrvorschubeinrichtung zum Einbringen eines auszuwalzenden Rohres in die Formänderungszone eines Kaltpilgerwalzwerkes
FR7402901A FR2258906B1 (de) 1974-01-14 1974-01-29
US439829A US3862560A (en) 1974-01-14 1974-02-05 Feed apparatus of tube cold rolling mill

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2401591A DE2401591C3 (de) 1974-01-14 1974-01-14 Rohrvorschubeinrichtung zum Einbringen eines auszuwalzenden Rohres in die Formänderungszone eines Kaltpilgerwalzwerkes
FR7402901A FR2258906B1 (de) 1974-01-14 1974-01-29
US439829A US3862560A (en) 1974-01-14 1974-02-05 Feed apparatus of tube cold rolling mill

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US3862560A true US3862560A (en) 1975-01-28

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US439829A Expired - Lifetime US3862560A (en) 1974-01-14 1974-02-05 Feed apparatus of tube cold rolling mill

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DE (1) DE2401591C3 (de)
FR (1) FR2258906B1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3050654C2 (de) * 1980-12-05 1991-04-25 Gosudarstvennyj Naucno-Issledovatel'skij I Proektnyj Institut Splavov I Obrabotki Cvetnych Metallov Giprocvet-Metobrabotka, Moskau/Moskva, Su
US5022250A (en) * 1987-03-18 1991-06-11 Mannesmann Ag Method of pilgrim step rolling
CN100395043C (zh) * 2006-06-16 2008-06-18 林深 冷轧管机轧制主运动和管坯送进回转运动的协调机构
US20090255312A1 (en) * 2008-04-15 2009-10-15 Glen Stapleton Apparatus for feeding and turning tube products into a pilger mill machine
CN102259117A (zh) * 2010-05-28 2011-11-30 扬州诚德钢管有限公司 一种堵头装卸机构
US20120036911A1 (en) * 2009-04-03 2012-02-16 Sumitomo Metal Industries, Ltd. Method for producing ultrathin-wall seamless metal tube by cold rolling method
CN101708503B (zh) * 2009-12-07 2012-09-05 中国重型机械研究院有限公司 一种两辊冷轧管机的回转送进机构的设计方法及装置
CN104415978A (zh) * 2013-08-27 2015-03-18 宁波芯直电气有限公司 一种全自动冷轧机
US20210220884A1 (en) * 2020-01-20 2021-07-22 Yanshan University Dynamic Contact Heat Transfer Simulation Device for Rolling Heavy-Load Deformation Zone

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2617662C2 (de) * 1976-04-22 1985-10-24 Mannesmann AG, 4000 Düsseldorf Vorschubeinrichtung für Warmpilgerwalzwerke
FR2514672A1 (fr) * 1981-10-15 1983-04-22 Gp Konstruk Laminoir a effet periodique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560934A (en) * 1947-07-05 1951-07-17 Tube Reducing Corp Reducing mill drive
US2594126A (en) * 1949-11-05 1952-04-22 Tube Reducing Corp Mill for reducing metal stock
US2680391A (en) * 1951-08-17 1954-06-08 Ingersoll Milling Machine Co Apparatus for working metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560934A (en) * 1947-07-05 1951-07-17 Tube Reducing Corp Reducing mill drive
US2594126A (en) * 1949-11-05 1952-04-22 Tube Reducing Corp Mill for reducing metal stock
US2680391A (en) * 1951-08-17 1954-06-08 Ingersoll Milling Machine Co Apparatus for working metal

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3050654C2 (de) * 1980-12-05 1991-04-25 Gosudarstvennyj Naucno-Issledovatel'skij I Proektnyj Institut Splavov I Obrabotki Cvetnych Metallov Giprocvet-Metobrabotka, Moskau/Moskva, Su
US5022250A (en) * 1987-03-18 1991-06-11 Mannesmann Ag Method of pilgrim step rolling
CN100395043C (zh) * 2006-06-16 2008-06-18 林深 冷轧管机轧制主运动和管坯送进回转运动的协调机构
US8161786B2 (en) 2008-04-15 2012-04-24 Glen Stapleton Apparatus for feeding and turning tube products into a pilger mill machine
US20090255312A1 (en) * 2008-04-15 2009-10-15 Glen Stapleton Apparatus for feeding and turning tube products into a pilger mill machine
US20120036911A1 (en) * 2009-04-03 2012-02-16 Sumitomo Metal Industries, Ltd. Method for producing ultrathin-wall seamless metal tube by cold rolling method
US8528378B2 (en) * 2009-04-03 2013-09-10 Nippon Steel & Sumitomo Metal Corporation Method for producing ultrathin-wall seamless metal tube by cold rolling method
CN101708503B (zh) * 2009-12-07 2012-09-05 中国重型机械研究院有限公司 一种两辊冷轧管机的回转送进机构的设计方法及装置
CN102259117A (zh) * 2010-05-28 2011-11-30 扬州诚德钢管有限公司 一种堵头装卸机构
CN104415978A (zh) * 2013-08-27 2015-03-18 宁波芯直电气有限公司 一种全自动冷轧机
CN104415978B (zh) * 2013-08-27 2016-08-24 宁波芯直电气有限公司 一种全自动冷轧机
US20210220884A1 (en) * 2020-01-20 2021-07-22 Yanshan University Dynamic Contact Heat Transfer Simulation Device for Rolling Heavy-Load Deformation Zone
US11705019B2 (en) * 2020-01-20 2023-07-18 Yanshan University Dynamic contact heat transfer simulation device for rolling heavy-load deformation zone

Also Published As

Publication number Publication date
FR2258906A1 (de) 1975-08-22
DE2401591B2 (de) 1977-09-22
DE2401591C3 (de) 1978-05-11
FR2258906B1 (de) 1976-11-26
DE2401591A1 (de) 1975-07-17

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