US3602025A - Continuous transverse rolling process and apparatus - Google Patents

Continuous transverse rolling process and apparatus Download PDF

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Publication number
US3602025A
US3602025A US801932A US3602025DA US3602025A US 3602025 A US3602025 A US 3602025A US 801932 A US801932 A US 801932A US 3602025D A US3602025D A US 3602025DA US 3602025 A US3602025 A US 3602025A
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United States
Prior art keywords
projection
line
rolls
shaped
stock
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Expired - Lifetime
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US801932A
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English (en)
Inventor
Taikichi Awano
Atsushi Danno
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Toyota Central R&D Labs Inc
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Toyota Central R&D Labs Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling

Definitions

  • the present invention relates to improvements in the process of and apparatus for continuous transverse hot rolling of stock to produce axially symmetrical products.
  • transverse hot rolling involves the feeding of stock in the form of long bars between moving dies, which may be cylindrical rolls, said dies having forming parts, or projections, thereon which roll the bar stock about its own axis, shaping and reducing the stock diameter by continuous rolling instead of by hammer impacts.
  • moving dies which may be cylindrical rolls
  • said dies having forming parts, or projections, thereon which roll the bar stock about its own axis, shaping and reducing the stock diameter by continuous rolling instead of by hammer impacts.
  • Parts of widely varying shapes, which are normally machined on automatic lathes can be produced including certain parts which cannot be produced on lathes, for example, those having longitudinal flutes, grooves, or splines.
  • the transverse rolling forming dies comprise rotary rolls with forming projections thereon
  • such projections may be integrally formed in the rolls, or may be separately formed and secured thereto.
  • a portion of the stock having the same cubic volume as that of the desired shaped product must be initially grasped by the rolls and subsequently formed by squeezing and elongation, it has proved to be very difficult to plan the forming rolls and to fabricate, or produce them.
  • each die roll includes a line-shaped feed projection.
  • a further object on the invention is to provide improved process and apparatus for continuous transverse hot rolling in which each die roll includes a V-shaped forming projection.
  • Still another object of the invention is to provide an improved process and apparatus for continuous transverse hot rolling in which the die rolls are provided with both a V- shaped forming projection and a line-shaped feed projection, the latter being parallel to the basic lead line of the forming projection and having a beginning point of the feeding projection which lies on the roll in advance of the beginning point of the forming projection.
  • a further object of the invention is to provide an improved process and apparatus for continuous transverse hot rolling which utilizes a pair of die rolls, having the above-described characteristics, wherein the axes of the die rolls lie in parallel planes, but one axis is tilted within its plane with respect to the other to provide a specific and important angle of intersection of the projections of the roll axes onto a plane, which is perpendicular to the shortest line between the roll axes and which includes the stock feed line, said angle of intersection of the projected axes being equal to the basic lead angle of the V- shaped forming projection and the corresponding lead angle of the line-forming projection.
  • FIG. 1 is a plan view of the mounting arrangement of the rolls used in accordance with the invention.
  • FIG. 2 is a side view of the mounting arrangement of the rolls
  • FIG. 3 is a diagram in plan showing an example of the product obtained by use of the invention.
  • FIG. 4! is a diagram showing the development of the peripheral surface of one of the rolls
  • FIG. 5 is a plan view of the same roll
  • FIG. 6 is an end elevation of the roll of FIG. 5;
  • FIG. 7 is a diagram in plan showing; another product in the invention.
  • FIG. 8 is a plan view of a modified roll.
  • the work, or stock, to be shaped by the method and apparatus according to the present invention is axially symmetrical bar stock, and the product of the invention is also axially symmetrical. Therefore, in this specification and the claims this axially symmetrical stock is recited as stock and the axially symmetrical product is recited as product for the sake of simplicity.
  • FIGS. I and 2 apparatus usable under the invention is shown in FIGS. I and 2 as comprising a pair of rolls 1,1 of identical form and size. These rolls are mounted such that their axes, i.e., the center lines of the rotary shafts 2,2, lie in parallel planes, and as is shown in FIG. 2, the shaft axes while retained in said planes, are tilted with respect to each other other so that when the axes of the shafts 2,2 are projected onto a plane perpendicular to the shortest line between said shafts, they will intersect on the line pp, each center line, or axis, of the shafts making the same angle with said line PP.
  • axes i.e., the center lines of the rotary shafts 2,2 lie in parallel planes, and as is shown in FIG. 2, the shaft axes while retained in said planes, are tilted with respect to each other other so that when the axes of the shafts 2,2 are projected onto a plane perpendicular to the shortest line between said
  • the angle 0 is selected as the lead angle of the line-shaped projections 3,3 for feeding the stock and also is the lead angle of the basic lead line BF, FIG. 4 of the projection 4,4 for forming the stock.
  • Stock S is fed between the rolls along the line PP in the direction of the arrows, FIG. 11.
  • the feeding projection 3 is helical in form having .the lead angle which conforms to the desired feed pitch of the stock.
  • the forming projection 4, inclusive of the basic lead line BF having the same lead angle 9 as that of the feeding projection 3 is also helical and parallel with the feeding projection 3 on the peripheral surface of the roll 1.
  • the starting end of the feeding projection 3 (left end portion in FIG. 4) is shaped in sharp wedge form increasing in height along the line AC to a predetermined height in the direction opposite the rotating direction on the roll 1 (i.e., toward the right side of FIG. 4) thereby to form the inlet portion 31 where the stock is first grasped by the forming roll.
  • the intermediate portion of the feeding projection along the line Cl of portion 32 is of uniform and predetermined height, corresponding to the maximum height of portion 31. If necessary, the end portion of the feeding projection 3 (the right end portion of FIG. 4) is made higher to form the cutting portion 321 for cutting the stock with the line IG as the knife edge.
  • the starting end of the forming projection 4 (the left end in the diagram of FIG. 4) is shaped into a sharp wedge along the line BB which is raised to a predetermined height from slightly in rear of the starting and inlet portion 31 of the feeding projection 3 in the direction (to the right in the diagram) opposite the rotating direction of the roll 1, thereby to form the inlet portion 41 where the stock is grasped by the forming projections.
  • the forming portion 42 has a plane surface 421, of a predetermined height (the same height as the maximum height of said inlet portion 41) and is widened, or expanded, in the roll axis direction by the expanding angle ,8 with the basic lead line BF.
  • the forming portion 42 also has a tilted surface 422 which connects to said portion 41 ans intersects the surface of the roll making the same angle as said expanding angle B with the basic lead line BF.
  • a finishing portion 43 is connected to the forming portion 42 (see the right side in the diagram of FIG. 4).
  • the finishing portion 43 includes the line I K of the tilted surface 432, connected to the tilted'surface 422 of the forming portion 42, and disposed parallel to the basic lead line BF.
  • the finishing portion also includes a plane surface 431, whose height is made equal to that of the plane surface 421 of the forming portion 42, and a tilted surface 432 whose intersection HE with the surface of the roll is disposed parallel to the basic lead line BF.
  • the facing wall surfaces of the feeding projection 3 (form the inlet portion 31 to the cutting portion 321) and the forming projection 4 (from the inlet portion 41 to the finishing surface 431) are parallel and are formed almost perpendicular to the surface of the roll, and a concave groove 5 is formed between the two.
  • the axially symmetrical stock 8 to be shaped is inserted between the rolls along the line and in the direction pp.
  • the inlet portion 31 of each feeding projection 3 will simultaneously bite the stock at their end points A, and the feeding projections will start to move the stock at right angle to their helical lines and the direction PP axially of the stock, the rotation of the rolls causing the stock to be rotated in a direction opposite each roll at its point of contact.
  • the stock continues to move in the direction of PP until its end is grasped by the inlet portion 41 of the forming projection so that, as the rolls continue to turn, a portion of the stock is pinched between the inlet portions 31 and 41.
  • the portion of the stock grasped by the inlet portion 31 of the feeding projection 3 arrives at the following portion 32 of predetermined height, and then it is continued to be rotated in the direction opposite the direction of the rotation of the rolls 1,1 while being guided by the portion 32 without being deformed thereafter.
  • the portion of the stock grasped by the inlet portion 41 rotates to arrive at the forming portion 42 of the forming projection 4, and is elongated, or extended thereby and along the feed line PP.
  • This elongation is in the direction perpendicular to the basic lead line BF of the forming projection 4 and is caused by the V-shaped of the forming projection whose forming portion 42 has the plane surface 421 widening by the expanding angle [3 and the tilted surface 422 at the same angle.
  • the stock as a whole is moved in the direction PP because it is being pinched at a part positioned within the groove portion 5 between the feeding projection 3 and the forming projection 4.
  • That portion of the stock which has passed through the forming portion 42 and arrived at the finishing portion 43 is ceased to be elongated in the axial direction and is subjected to surface finishing while rotating of the finishing portion 43 because the line I K and the basic lead line BF are parallel.
  • the connection between the stock which has passed through the finishing portion, and the unprocessed portion of the stock is cut off by the cutting portion 321, and the product D (full lines, FIG. 3) is obtained.
  • the stock S which is grasped at the respective end points A and B of the feeding projection '3 and the forming projection 4 is forwarded in the direction PP and rolled as far as the respective end points F and G, and as a result the stock S is shaped into one product D as the required portion of the stock S is extended in the direction PP until the bite of the following portion of the stock occurs at the point A on the next revolution.
  • a feeding projection has not heretofore been utilized in conventional, continuous hot-rolling processes.
  • the feeding projection 3 is provided in such a manner that a helical line is formed on the surface of the roll in the direction in which the stick is inserted.
  • the stock is grasped by said feeding projection and rotated by the rolls.
  • the stock is guided by said feeding projection while being rotated in the direction opposite the rotating direction of the rolls, and the stock is moved on the peripheral surface of the rolls in a direction perpendicular to said helical line.
  • the direction in which the stock is extended by the forming projection is made to agree with the direction in which the stock is moved by the feeding projection, by arranging the forming projection parallel to the feeding projection and by providing a processing surface whose width is increased in the direction opposite the rotating direction of the rolls.
  • the lead angle of the basic lead line of the forming projection agrees with that of the feeding projection, and therefore, the stock can be extended freely in the axial direction thereof, and it is possible to continuously roll the stock smoothly and easily.
  • a cutting portion is provided at the end of the feeding projection, but it is, of course, possible to continuously shape the stock without providing said cutting portion, and in such a case, products D, D, C" unitedly and continuously formed, as is shown by the full and dotted lines in FIG. 3, will be obtained.
  • the rolls are planned in such a manner that more than two forming projections are separately provided in parallel with the feeding projection in the peripheral direction of the rolls, or one forming projection is overlapped by a part of another, or a plurality of forming projections are overlappingly provided in parallel with said feeding projection in the axial direction of the roll.
  • the roll 1C When a desired product is relatively long, the roll 1C, FIG. 8, whose peripheral surface is formed as a hyperboloid of revolution, is used. A feeding projection and forming projection are provided on said roll 1C similar to those described in the embodiment of FIGS. 1-5, thus making it possible to attain continuous and stable forming with excellent precision.
  • rolls being formed as hyperboloids of revolution
  • rolls formed as circular cones with their upper parts cut off, or truncated can also be used to attain the same effect.
  • Providing serrations on the tilted surface of the forming projection ensures a firm grip of the stock, to stabilize the rolling process.
  • Continuous transverse rolling apparatus comprising a pair of rolls each having a V-shaped forming projection and a line-shaped feeding projection disposed helically on its surface in such a way that the basic lead angle of said V-shaped forming projection is equal to the lead angle of said feeding projec tion, said rolls being identical in form and size, the axes of rotation of said rolls being disposed in parallel planes but tilted in said planes so that projection of said axes onto a plane perpendicular to the shortest line between the axes will intersect at a point falling on a feed line foe axially symmetrical stock to be inserted between the rolls, each projection of said axes making the same angle with said feed line, and said angle being equal to the basic lead angle of said forming projection.
  • a process for continuous transverse rolling utilizing a pair of rolls each having a V-shaped forming projection helically disposed thereon and a line-shaped feeding projection parallel to said forming projection disposed helicall on its surface in such a way that the basic lead angle of said -shaped forming projection is equal to the lead angle of'said feeding projection, comprising the steps of disposing said rolls with their axes in parallel planes but tilted therein so that the projections of the axes onto a plane perpendicular to the shortest line between said axes intersect at a point lying in a stock-feed line passing between the rolls, continuously rotating said rolls, and inserting axially symmetrical bar stock between said rotating rolls along said feed line so that the inserted end portion of said stock is pinched at a portion positioned between said lineshaped feeding projection and the basic lead line of said V- shaped forming projection, and fed axially of the stock by said line-shaped feeding projections, and the portion of said stock adjacent to said pinched portion of said stock is freely
  • each of said pair of rolls is shaped as a cylinder on which the V-shaped forming projection and the line-shaped feeding projection are formed.
  • each of said rolls is shaped as a hyperboloid of revolution on which the V- shaped forming projection and the line-shaped feeding projection are formed.
  • V-shaped forming projection includes at its starting end a sharp wedge rising to a predetermined height, a plane surface extending around the cylinder at said predetermined height, and a tilted surface extending from the roll surface to intersect said plane surface along a line which makes an expanding angle with said basic lead line of the forming projection.
  • Vshaped forming projection terminates is a finishing portion, said finishing portion being disposed parallel to the basic lead line of the V-shaped forming projection and having a constant width and a height equal to said predetermined height of the plane surface of the forming projection.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Tires In General (AREA)
US801932A 1968-03-01 1969-02-25 Continuous transverse rolling process and apparatus Expired - Lifetime US3602025A (en)

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JP1372968 1968-03-01

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DE (1) DE1910549C3 (de)
GB (1) GB1249215A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942348A (en) * 1973-11-06 1976-03-09 Mitsubishi Jukogyo Kabushiki Kaisha Cutter dies for the cross rolling machine
US4206623A (en) * 1979-01-25 1980-06-10 Vyzkumny Ustav Tvarecich Stroju A Technologie Tvareni Method of and apparatus for feeding rod-shaped elements sequentially in spaced relationship
US5957777A (en) * 1997-07-04 1999-09-28 Rivet Technology ( P) Ltd. Method of manufacturing fasteners
EP1199119A3 (de) * 2000-10-19 2003-07-23 Hans-Gert Schmitz Vorrichtung zur Herstellung von Umformteilen
US6644151B2 (en) * 2000-03-20 2003-11-11 Mannesmann Ag Apparatus for the continuous, chipless separation of individual, identical disk-shaped blanks or rods from round bar-shaped workpieces
US20220305541A1 (en) * 2017-12-19 2022-09-29 Victaulic Company Cams for Pipe Grooving Device
US11759839B2 (en) 2020-09-24 2023-09-19 Victaulic Company Pipe grooving device
US11885400B2 (en) 2015-11-30 2024-01-30 Victaulic Company Method of forming grooves in pipe elements
US11883871B2 (en) 2019-08-21 2024-01-30 Victaulic Company Pipe receiving assembly for a pipe grooving device
US11898628B2 (en) 2015-11-30 2024-02-13 Victaulic Company Cam grooving machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2233737C2 (de) * 1971-07-12 1983-02-03 Société Anonyme Française du Ferodo, 75017 Paris Wärmetauscher, insbesondere Kühler für ein Kraftfahrzeug
DE2715611A1 (de) * 1977-04-07 1978-10-12 Thyssen Industrie Ringwalzmaschine
DE2929008A1 (de) * 1979-07-18 1981-02-05 Groov Pin Corp Verfahren zur herstellung von lobulaeren einsatzstuecken mit innen- und aussengewinde
AT382093B (de) * 1984-10-19 1987-01-12 Balint Ludwig Verfahren und vorrichtung zur herstellung von rotationskoerpern durch fliessumformung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US361954A (en) * 1887-04-26 mannesmann
US1601551A (en) * 1924-06-09 1926-09-28 Petter B Abramsen Cross rolling
US2014203A (en) * 1934-03-22 1935-09-10 Karl L Herrmann Machine for forming roller blanks
US2060087A (en) * 1934-06-02 1936-11-10 Timken Roller Bearing Co Mill for rolling articles of circular section and irregular profile
US2150815A (en) * 1937-09-30 1939-03-14 Berger Kornel Screw-threaded stock and manufacture of same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US361954A (en) * 1887-04-26 mannesmann
US1601551A (en) * 1924-06-09 1926-09-28 Petter B Abramsen Cross rolling
US2014203A (en) * 1934-03-22 1935-09-10 Karl L Herrmann Machine for forming roller blanks
US2060087A (en) * 1934-06-02 1936-11-10 Timken Roller Bearing Co Mill for rolling articles of circular section and irregular profile
US2150815A (en) * 1937-09-30 1939-03-14 Berger Kornel Screw-threaded stock and manufacture of same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942348A (en) * 1973-11-06 1976-03-09 Mitsubishi Jukogyo Kabushiki Kaisha Cutter dies for the cross rolling machine
US4206623A (en) * 1979-01-25 1980-06-10 Vyzkumny Ustav Tvarecich Stroju A Technologie Tvareni Method of and apparatus for feeding rod-shaped elements sequentially in spaced relationship
US5957777A (en) * 1997-07-04 1999-09-28 Rivet Technology ( P) Ltd. Method of manufacturing fasteners
US6644151B2 (en) * 2000-03-20 2003-11-11 Mannesmann Ag Apparatus for the continuous, chipless separation of individual, identical disk-shaped blanks or rods from round bar-shaped workpieces
EP1199119A3 (de) * 2000-10-19 2003-07-23 Hans-Gert Schmitz Vorrichtung zur Herstellung von Umformteilen
US11885400B2 (en) 2015-11-30 2024-01-30 Victaulic Company Method of forming grooves in pipe elements
US11898628B2 (en) 2015-11-30 2024-02-13 Victaulic Company Cam grooving machine
US20220305541A1 (en) * 2017-12-19 2022-09-29 Victaulic Company Cams for Pipe Grooving Device
US11883871B2 (en) 2019-08-21 2024-01-30 Victaulic Company Pipe receiving assembly for a pipe grooving device
US11759839B2 (en) 2020-09-24 2023-09-19 Victaulic Company Pipe grooving device

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Publication number Publication date
DE1910549A1 (de) 1970-06-25
GB1249215A (en) 1971-10-13
DE1910549C3 (de) 1980-04-10
DE1910549B2 (de) 1979-08-02

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