US3698225A - Intermittently acting rolling mill - Google Patents

Intermittently acting rolling mill Download PDF

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Publication number
US3698225A
US3698225A US888659A US3698225DA US3698225A US 3698225 A US3698225 A US 3698225A US 888659 A US888659 A US 888659A US 3698225D A US3698225D A US 3698225DA US 3698225 A US3698225 A US 3698225A
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United States
Prior art keywords
cage
rolling mill
carriage
product
rolled
Prior art date
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Expired - Lifetime
Application number
US888659A
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English (en)
Inventor
Pierre Peytavin
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.)
Vallourec Usines a Tubes de Lorraine Escaut SA
Original Assignee
Vallourec Usines a Tubes de Lorraine Escaut SA
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Publication of US3698225A publication Critical patent/US3698225A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H27/00—Step-by-step mechanisms without freewheel members, e.g. Geneva drives
    • 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
    • B21B21/06—Devices for revolving work between the steps
    • B21B21/065—Devices for revolving work between the steps for reciprocating stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B2035/005—Hydraulic drive motors

Definitions

  • This invention relates to an intermittently driven rolling mill, and more particularly to a drive for periodically advancing the product to be rolled in a mill of this type.
  • intermittently driven rolling mills are rolling mills in which the cage supporting the rolls has an alternating movement with respectto the product being rolled. This alternating movement is synchronized with the rotation of the rolls, and means are provided for advancing the product being rolled between two successive rolling passes.
  • the present invention relates more particularly to the case in which the cage carrying the rolls is reciprocated with respect to the material being rolled.
  • the product being rolled must be axially advanced between successive passes so that it is progressively gripped between the rolls which act thereupon, and may also have to rotate about its own axis.
  • Such intermittently driven rolling mills are a recent development which make it possible to roll material at relatively high speeds but require the advancement of the material being rolled during a relatively short period of time which must be precisely controlled.
  • the present invention relates to a device which meets these requirements by using a particularly simple and sturdy mechanism.
  • the object of the present invention is to provide a new article of manufacture which consists of an intermittently driven rolling mill comprising a device for rotating the product being rolled.
  • This mill comprises a shaft continuously rotated in synchronism with the oscillation of the cage and which is connected to means which transform this continuous rotary movement into an intermittent rotary movement which is communicated to the product to be rolled.
  • the machine is characterized by the fact that the continuous rotary movement is transmitted to as least one device for converting the continuous rotary motion into intermittent rotary motion which is positioned close to a clamp. Each clamp imparts intermittent rotation to the product being rolled.
  • Each drive means drives only the clamp associated therewith.
  • the movement which produces the intermittent rotation of the product being rolled is thus transmitted in the form of continuous rotation to a point near the clamps which communicate intermittent rotation to the product being rolled. This results in a much more exact transmission of a successive rotation.
  • a suitable known device such as a Ferguson transmission
  • This consists of a particular type of worm screw and tangent wheel the teeth of which are so positioned that during the greater part of the rotation of the continuously driven drive shaft the shaft to be intermittently rotated is not driven, whereas over a relatively small angle (generally less than of the rotation of the continuously driven shaft, the intermittently actuated shaft is driven through a predetermined angle.
  • This device is essentially characterized by the fact that it comprises a carriage mounted on a slideway extending longitudinally of the rolling mill.
  • This carriage is driven by a variable speed drive such, for example, as screw and nut, and is continuously driven in synchronism with the oscillations of the cage of the rolling mill through a grooved shaft.
  • the continuous rotation drives a cam which periodically swings a pressure member which axially displaces the product being rolled.
  • the screw which drives the carriage is driven by a hydraulic motor which is supplied with pressure fluid by a variable output hydraulic pump carried by the device which drive the cage.
  • the speed of rotation of the screw may be regulated by regulating the output of the hydraulic pump.
  • the two drive means which have just been described are combined in a single rolling mill.
  • the carriage is driven directly from the continuously driven shaft which is used to produce the successive rotations of the product being rolled.
  • FIG. 1 is a schematic perspective view of an intermittently driven rolling mill according to the invention
  • FIG. 2 is a schematic top plan view of the rolling mill shown in FIG. 1;
  • FIG. 3 is a sectional view taken through the carriage perpendicularly of the path of travel of the material being rolled;
  • FIGS. 4 and 5 are sectional views: taken along the line IV-IV of FIG. 3 showing the positions of the pressure exerting arm at two different times.
  • the embodiment shown on the drawing is a device for rolling tubes in accordance with a known process in which the thickness of the tube wall is reduced by rolling it between two rolls while a mandrel having a diameter substantially equal to the internal diameter of the tube is maintained inside the tube in alignment with the rollers.
  • This mandrel is carried by a rod which projects out of the rear end of the tube.
  • FIG. 1 shows schematically an intermittently driven rolling mill comprising a roller cage 1 which is shown in broken lines because the details thereof are not essential to an understanding of the invention.
  • This cage is reciprocated by two connecting rods 2 and 3 attached to cranks 4 and 5.
  • the cranks are driven in synchronism in opposite directions through gearing 6 and 7 by a motor 8 schematically shown on FIG. 2.
  • FIGS. 1 and 2 also show schematically the two tube clamps 9 and 10 which hold the tubes in a conventional manner on opposite sides of the roller cage 1, together with the rod clamp 11 at the left end of the rolling mill.
  • This rod clamp holds the mandrel carrying rod and imparts thereto successive rotations in synchronism with the rotations imparted to the tube clamps 9 and 10.
  • FIGS. 1 and 2 also show the shaft 12 which is driven continuously in synchronism with the rotation of the crank through the shafts 13 and 14 and gear boxes 15, 16 and 17, which have been schematically shown.
  • the shaft 12 and the shaft 13 may, in an alternative embodiment, be the same.
  • the shaft 12 is connected to three Ferguson gear boxes 18, 19 and 20 which, in response to each revolution of the shaft 12, impart a rotational movement through a given angle to the shafts 21, 22 and 23, which rotate the tube clamps 9 and and the rod clamp 11.
  • the gear boxes 18, 19 and are so arranged that during rotation through about 105, for example, they impart a rotation through 60 to the shafts 21, 22 and 23, whereas during the remaining portion of a complete revolution of the shaft 12 no rotation is imparted to the shafts 21, 22 and 23. It will be seen that in this manner a predetermined degree of rotation can be imparted to the tube clamps 9 and 10 and the rod clamp 11, which rotation takes place only during a period of time corresponding to a l05 rotation of the shaft 12.
  • Such gear boxes are sold by Ferguson under the name lntermittor.
  • FIGS. 1 and 2 also show the carriage 24 which is slidable on a slideway 25 carried by the framework of the rolling mill.
  • This carriage is provided with a pressure-exerting arm 26 in the form of a fork which will be hereinafter described in greater detail.
  • a grooved rod 27 is rotationally driven by the shaft 13 through a transmission shaft 48 and turns in synchronism with the movements of the cage.
  • the shaft 12 itself may be partially grooved to cooperate with the carriage.
  • the transmission of continuous rotary movement for a substantial distance from the cranks 4 and 5 makes it easy to provide the necessary movement of the carriage.
  • a screw 28 axially displaces the carriage 24 by acting on a nut mounted inside that carriage.
  • the screw 28 is driven by a hydraulic motor supplied through tubes 30 in a closed circuit including the variable output hydraulic pump 31, which is driven by the crank 5 which reciprocates the cage 1.
  • the speed of rotation of the screw 28 is proportional to the speed of rotation of the crank 5 and consequently to the frequency of reciprocation of the cage.
  • the exact proportional relationship may be controlled by regulating the output of the pump 31.
  • FIG. 1 schematically illustrates a source of hydraulic fluid under pressure 32 which is adapted to insure the rapid return of the carriage 24 when connected to supply a hydraulic motor 29 which operates in the reverse direction.
  • FIG. 3 shows on a larger scale a section taken through an embodiment of the carriage 24 which travels on the slideway 25 fixed to the framework of the rolling mill.
  • This figure shows the screw 28 which is engaged in a nut 33 fixed to the carriage so as to produce axial movement of the carriage.
  • FIG. 3 also shows the grooved rod 27 which drives a pinion 34 (shown in broken lines) the movement of which is transmitted to a bevel gear 35 through the transmission shaft 36 and bevel gears 37 and 38.
  • the gear 35 rotates a shaft 39 carrying an eccentric cam 40, one side of which may be seen on FIGS. 4 and 5.
  • the pressure-exerting arm 26 is pivotally attached at 42 to the carriage and actuated by cam 40 through a roller-carrying pin 41.
  • the lower branches of the pressure-exerting arm 26 act on the end of a movable sleeve 43 which is mounted to slide axially on the carriage.
  • a return spring 44 constantly urges the sleeve 43 toward the right of the carriage.
  • a cylinder 45 mounted to turn about the axis of the sleeve 43.
  • This cylinder is provided with a spring-biased stop 46 having an inclined surface 47 so that it is forced outwardly of the cylinder 45 when a tube is introduced into the cylinder from the left.
  • the stop 46 prevents the tube from entering the cylinder 45.
  • the tube clamps 9 and 10 and the rod clamp 11 periodically rotate the tube and the mandrel carrying rod in synchronism with the reciprocating movement of the cage 1 of the rolling mill.
  • the tube clamps 9 and 10 are adapted to maintain the tube in its axial position when the tube is simply subjected to the strains which result from rolling, but when the cam 40 swings pressure-exerting arm 26 so as to displace the tube which is in contact with the stop 46 the tube clamps 9 and 10 permit this axial sliding of the tube without imposing any resistance thereto.
  • the speed of rotation of the threaded rod 28 may be regulated at will so long as it remains proportional to the speed of the crank 5.
  • the specific proportional relationship may be selected at will depending upon the extent of the axial advance which is desired.
  • the position of the elements shown on FIG. 4 corresponds to the moment at which a tube has just been axially advanced.
  • FIG. 4 shows the position of the different elements at the moment at which the cam 40 has permitted the pressure exerting arm 26 to swing. It will then be returned to the position of FIG. 5 thus urging the tube to the right.
  • the invention accordingly makes it possible to advance the product being rolled in the required manner in a particularly simple and accurate way.
  • Intermittently acting rolling mill comprising a reciprocating roller cage, drive means for continuously rotating in a single direction a drive member, which member is connected to drive said roller cage through means for converting the continuous rotary motion of said drive member to reciprocating movement by said cage, shaft means substantially parallel to the direction of reciprocation of said cage and connected to be continuously driven in synchronism with said drive member, at least one rotatable clamp for gripping a product being rolled in said roller cage, a device through which said at least one clamp is driven from said shaft means, which device converts the continuous rotation of said shaft means to intermittent rotation by said at least one clamp in synchronism with the reciprocating movement of said cage, a carriage for supporting said product, means for continuously driving said carriage in said direction of reciprocation,
  • oscillating means mounted on said carriage for intermittently advancing said product in the direction of reciprocation of said cage, and. means for converting continuous rotary motion to oscillating motion which connects said shaft means to drive said oscillating means and causes said oscillating means to oscillate in synchornism with the reciprocating movement of said cage.
  • Rolling mill as claimed in claim 1 in which the means for converting continuous rotation to intermittent rotation comprises a worm and tangent wheel transmission of the Ferguson type.
  • Rolling mill is claimed in claim 1 in which the means for driving said carriage is a threaded rod substantially parallel to the direction of reciprocation of said cage and connected to be continuously rotated in s nchronism with said drive member.
  • y Rolling mill is claimed in claim 4 in which said threaded rod is driven by a hydraulic motor driven by a variable output hydraulic pump.
  • said means for converting continuous rotary motion to oscillating motion comprises a cam rotatably mounted on said carriage and in which said oscillating means is a pivotally mounted arm likewise mounted on said carriage and actuated by said cam to periodically advance the product being rolled, said continuously rotating shaft being connected to rotate said cam.
  • said carriage comprises a sleeve mounted to slide along the path of travel of the product to be rolled, in alignment with the roller cage which act on said product, spring means biassing said sleeve toward said cage and a cylinder coaxially and rotatably mounted in said sleeve, said cylinder being provided with a resiliently mounted stop which permits the product to be rolled to pass through said cylinder in one direction, but prevents its passage in the other direction.
  • Rolling mill as claimed in claim 5 comprising a source of pressure fluid and means for connecting said source to said hydraulic motor to drive it in a reverse direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transmission Devices (AREA)
US888659A 1968-12-31 1969-12-29 Intermittently acting rolling mill Expired - Lifetime US3698225A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR182844 1968-12-31
US88865969A 1969-12-29 1969-12-29

Publications (1)

Publication Number Publication Date
US3698225A true US3698225A (en) 1972-10-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US888659A Expired - Lifetime US3698225A (en) 1968-12-31 1969-12-29 Intermittently acting rolling mill

Country Status (6)

Country Link
US (1) US3698225A (de)
AT (1) AT317126B (de)
DE (1) DE1963837A1 (de)
FR (1) FR1602013A (de)
GB (1) GB1293399A (de)
SE (1) SE383611B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154079A (en) * 1977-02-03 1979-05-15 Vallourec (Usines A Tubes De Lorraine-Escaut Et Vallourec Reunies) Intermittent rolling mill
US4955220A (en) * 1989-11-22 1990-09-11 Sandvik Special Metals Corporation Low inertia mechanism for repositioning a workpiece in a rocker mill
US5022250A (en) * 1987-03-18 1991-06-11 Mannesmann Ag Method of pilgrim step rolling
US20120125066A1 (en) * 2009-05-15 2012-05-24 Sandvik Materials Technology Deutschland Gmbh Feed drive for a cold pilgering mill
US9086124B2 (en) 2009-11-24 2015-07-21 Sandvik Materials Technology Deutschland Gmbh Drive for a pilger roller system
US9120135B2 (en) 2009-05-15 2015-09-01 Sandvik Materials Technology Deutschland Gmbh Chuck for a cold-pilgering mill

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2230427B1 (de) * 1973-05-24 1977-07-29 Vallourec
US4145906A (en) * 1978-02-21 1979-03-27 Proizvodstvennoe Obiedinenie "Elektrostaltyazhmash" Feeding device of a tube cold-rolling mill
FR2419777A1 (fr) * 1978-03-17 1979-10-12 Proizv Obied Elektrost Mecanisme d'avance pour train de laminage de tubes a froid
FR2530503A1 (fr) * 1982-07-21 1984-01-27 Vallourec Procede de laminage a froid de tubes au moyen d'un laminoir a pas de pelerin et dispositif pour la mise en oeuvre du procede
FR2550108B1 (fr) * 1983-08-01 1986-06-27 Vallourec Procede de laminage a froid de tubes au moyen d'un laminoir a pas de pelerin et laminoir pour sa mise en oeuvre

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680391A (en) * 1951-08-17 1954-06-08 Ingersoll Milling Machine Co Apparatus for working metal
US2703999A (en) * 1953-11-24 1955-03-15 See Fabriks Aktiebolag Pilgrim rolling mills
US3030835A (en) * 1958-06-06 1962-04-24 Blaw Knox Co Tube rolling machine
US3411336A (en) * 1966-04-06 1968-11-19 Blaw Knox Co Tube rolling machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680391A (en) * 1951-08-17 1954-06-08 Ingersoll Milling Machine Co Apparatus for working metal
US2703999A (en) * 1953-11-24 1955-03-15 See Fabriks Aktiebolag Pilgrim rolling mills
US3030835A (en) * 1958-06-06 1962-04-24 Blaw Knox Co Tube rolling machine
US3411336A (en) * 1966-04-06 1968-11-19 Blaw Knox Co Tube rolling machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154079A (en) * 1977-02-03 1979-05-15 Vallourec (Usines A Tubes De Lorraine-Escaut Et Vallourec Reunies) Intermittent rolling mill
US5022250A (en) * 1987-03-18 1991-06-11 Mannesmann Ag Method of pilgrim step rolling
US4955220A (en) * 1989-11-22 1990-09-11 Sandvik Special Metals Corporation Low inertia mechanism for repositioning a workpiece in a rocker mill
US20120125066A1 (en) * 2009-05-15 2012-05-24 Sandvik Materials Technology Deutschland Gmbh Feed drive for a cold pilgering mill
US9120135B2 (en) 2009-05-15 2015-09-01 Sandvik Materials Technology Deutschland Gmbh Chuck for a cold-pilgering mill
US10155257B2 (en) * 2009-05-15 2018-12-18 Sandvik Materials Technology Deutschland Gmbh Feed drive for a cold pilgering mill
US9086124B2 (en) 2009-11-24 2015-07-21 Sandvik Materials Technology Deutschland Gmbh Drive for a pilger roller system

Also Published As

Publication number Publication date
GB1293399A (en) 1972-10-18
FR1602013A (de) 1970-09-28
SE383611B (sv) 1976-03-22
DE1963837A1 (de) 1970-07-23
AT317126B (de) 1974-08-12

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