US3019678A - Tube tapering machine - Google Patents

Tube tapering machine Download PDF

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Publication number
US3019678A
US3019678A US749678A US74967858A US3019678A US 3019678 A US3019678 A US 3019678A US 749678 A US749678 A US 749678A US 74967858 A US74967858 A US 74967858A US 3019678 A US3019678 A US 3019678A
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United States
Prior art keywords
tube
dies
tubing
diameter
template
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Expired - Lifetime
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US749678A
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English (en)
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Fiell Cecil K Le
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Individual
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Individual
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Priority to US749678A priority Critical patent/US3019678A/en
Priority to GB22787/59A priority patent/GB901844A/en
Priority to FR793366A priority patent/FR1229348A/fr
Priority to CH7589959A priority patent/CH376079A/de
Application granted granted Critical
Publication of US3019678A publication Critical patent/US3019678A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes

Definitions

  • an object of the invention is to rovide a method and apparatus for tapering or otherwise altering the shape of a cylindrical metal tube which usually has initially a uniform wall thickness.
  • tubular stock that initially is of uniform external diameter and internal diameter is continuously rotated between adjustable dies that are progressively moved in an axial direction with respect to the tube.
  • adjustable dies that are progressively moved in an axial direction with respect to the tube.
  • These dies apply radially inward pressure to the exterior or the tube at localized portions thereof as the dies progressively move along the length of the tube.
  • the dies present opposed, matched, semi-circular tapered grooves which on rotation of the dies in one direction will tend to cause the effective orifice between dies to be reduced and thus reduce external diameter of the tube.
  • the dies Conversely, if the dies are caused to rotate in the opposite direction they will open with respect to the tube. In this manner, by rotating the dies the tube can be caused to taper from its initial large diameter to a small diameter, and if the dies are then opened the tube can be caused to taper from its small diameter back to a larger diameter.
  • the action of the dies on the tube may be regarded as somewhat in the nature of a combined spinning and drawing action.
  • a force can be applied to the tube axially thereof.
  • this force is in the nature of a tensile force tending to stretch the tube while it is being reduced in diameter.
  • the stretching of the tube tends to keep the tube straight while it is being reduced in diameter.
  • the stretching of the tube tends to keep the tube straight while it is being acted upon which is one important advantage, and in addition thereto, considerable control is afforded with respect to the wall thickness of the finished tapered tube.
  • the dies tend to compress the wall of the tube circumferentially during the tapering operation from a large diameter to a smaller diameter, the metal of the tube may tend to increase in wall thickness.
  • a sufficient axial force may be applied to stretch the tube and thus obtain a uniform or decreasing wall thickness despite the fact that the tube has had its external diameter reduced.
  • an object of the present invention to provide a method and apparatus for tapering or altering cylindrical tube stock of uniform wall thickness wherein provision is made for adjustably applying an axial force to the tube while it is being continuously rotated and acted upon by the adjustable dies that progressively move along the length of the tube.
  • FZGURE 1 is a view in side elevation of a tube tapering machine embodying the present invention
  • FIGJ. is a top plan view of the same.
  • PEG. 4 is a sectional view taken substantially upon the line 44 upon FIG. 1 in the direction indicated;
  • FIG. 5 is a horizontal section taken substantially upon the line 5-5 upon FIG. 4 in the direction indicated;
  • FIG. 6 is a vertical section taken substantially upon the line 6-6 upon FIG. 4 in the direction indicated, the dies being shown in that position wherein they are about to commence their tapering operation on the tube;
  • FIG. 7 is a view similar to FIG. 6, but illustrating the dies in a position wherein the tapering operation on the tube is substantially completed;
  • FIG. 8 is a sectional view through a tube that has been typically tapered by use of the present method and apparatus.
  • the machine embodying the present invention consists of a frame or bed generally indicated at 16, at one end of which there is a stationary headstock 11 within which there is a rotary spindle 12 that can be rotated at various speeds, such as by a belt 13.
  • a chuck 14 In this spindle there is a chuck 14 in which one end of a metal tubing T may be chucked so that it can be rotated thereby.
  • the frame or bed provides longitudinally extending ways on which a die carrier 15 and a tailstock 16 are movable.
  • the tailstock has a hollow spindle 1'7 rotatably mounted thereon such as by anti-friction bearings 18.
  • a mandrel 19 extends longitudinally through the spindle i7 and is slidable with respect thereto.
  • This mandrel is keyed to the spindle 17 such as by a key 20 that slides in a keyway 21 that extends the entire length of the mandrel.
  • the key 20 also serves to key a pulley 22 to the spindle.
  • At the forward end of the mandrel there is a chuck 23 in which the other end of the tube T is chucked, the chuck 23 being arranged in axial alignment with the chuck 14.
  • a collar 24- that is positioned against the end of spindle 17.
  • This collar can be selectively positioned at any position along the length of the mandrel 19 by means of a bolt or pin 25 that is selectively receivable in any one of apertures 26 that extend diametrically through the mandrel.
  • a shaft 27 is rotatably mounted in shaft supports 28 mounted on the bed or frame 10. This shaft is arranged parallel to the length of the bed and is driven off of the spindle 12 such as by a belt 29.
  • a belt 30, drives the spindle 17 on the tailstock oil of the shaft 27.
  • the belts 29 and 39 are in the nature of toothed belts so that the spindle .12 and 17 will rotate in perfect unison or in synchronism to rotate forcibly both ends of the tubing T. This could also be done by chains and sprockets or gear trains.
  • the adjustable dies which act upon the exterior of the tubing T are illustrated at 31 and 32. These dies are rotatably mounted on die carrier 15 for rotation about transverse axes indicated at 33 and 34, respectively. These dies have opposed matching semi-circular tapered grooves 35 and 36 formed on the peripheral surfaces there of which semi-circular grooves taper from one end to the other. Thus, at one end of each groove the radius of the curve is substantially equal to the radius of the exterior of the largest tube within the machines capacity. The other end of each groove has a radius equal to the radius of the smallest diameter within the capacity of the machine.
  • Tubes of any diameter within the range of the dies may be tapered. It is not necessary to have different dies for various sizes or tapers.
  • the dies 31 and 32 are gearedly connected together such as by gears 37 and 33 so as to cause them to rotate in unison and in opposite directions.
  • One of the dies has associated therein a pinion 39 which meshes with a rack 49 that is vertically slidable on the die carrier.
  • the rack 4i) is connected to the piston rod 41 of a ram, the cylinder of which is indicated at 4-2.
  • the ends of the cylinder are connected by tubing 43 to a tracer control valve 44 equipped with a finger or follower 57 that is engageable with the top edgeof a template or cam 58.
  • the control valve 44 is actuated by the finger 5'7 and controls the supply of fluid pressure from the pump or other source of fluid pressure, not shown, to the ends of the cylinder 42.
  • Control valve 44 is fixedly mounted on rack 40 thereby acting as a tracer control. (These tracer control valves are in common use in other machinery.)
  • the die carrier 15 is caused to move steadily or at a uniform rate along the length of the bed in by means of a ram 50, the piston rod of which indicated at 51, is connected to the die carrier.
  • the cylinder of the ram may be supplied with fluid pressure through tubings 52 so as to cause the die carrier to move axially with respect to the tubing T at a uniform rate, or at least at a rate to cause the dies to apply a constant even pressure to the exterior of the tubing T that is being worked upon.
  • the tailstock 16 is also urged to move lengthwise of the bed by means of a ram 53 which has a piston rod 54 connected to the tailstock.
  • This ram has its cylinder connected by tubings 55 to a pressure control valve 56, that is actuated by a pinion 45 that meshes with a rack 46 that is vertically slidable thereon and which carries a roller 47 that rolls on a template or cam 48 that is replaceabiy mounted on the frame 10.
  • the shape of the top edge of the template or cam 48 governs vertical movements of the rack 46. Vertical movements of the rack 46 actuate the pinion 45 and cause the control valve 56 to regulate fluid pressure to the ends of the cylinder 53 as required.
  • This fluid pressure is supplied to the machine through tubing 49 from any suitable source of fluid pressure such as a hydraulic pump, not shown.
  • a four-way valve, not shown, reverses the direction of travel of tailstock by reversing pressure to the other end of cylinder 53 when required.
  • the pulley for the belt 30 that is on the shaft 27 must likewise move lengthwise of the bed.
  • This pulley indicated at 59 is consequently keyed to the shaft and may move lengthwise of the shaft along with the tailstock.
  • the ram 53 when actuated, may cause the tailstock to move away from the headstock to impose a tension on the tubing T. This tension assists in keeping the tubing T straight while the tubing T is being acted upon by the adjustable dies 31 and 32, and also takes up resulting lengthening of tube.
  • the dies 31 and 32 in all positions of adjustment present surfaces or lines of contact with the tubing T that slidingly engage the tubing as it rotates.
  • the top edge of the template or cam 48 may be merely an inclined straight edge, causing the adjustable dies 31 and 32 to rotate in unison and at a substantially uniform rate as the die carrier proceeds along the length of the bed It).
  • the tubing T is to be tapered from the end 61 to a point of minimum diameter 62, and then be tapered reversely back to the maximum diameter as indicated at 63, then the tarnplate or cam 48 is given a corresponding shape to cause the dies 3 ⁇ . and 32 to first be rotated in one direction to taper the tubing from 6ft to 62, and then to be rotated in the opposite direction to reversely taper the tubing T from 52 to 63.
  • the decrease in external diameter of the tubing T between 61 and 62 usually causes the wall thickness of the tubing T to increase from 6-1 to 62. It sometimes is desirable, however, that the wall thickness of the tubing remain uniform or even decrease despite the fact that the tubing is tapered. If this is the case the template or cam 48 is so shaped as to actuate the pressure regulator 56 and vary the pressure supplied to the ram 53. Thus, as the dies proceed from 61 to 62 the pressure regulator 56 may be so actuated as to cause the ram 53 to progressively increase the pressure supplied to the ram 53 and thus progressively increase the tension applied to the tubing T to stretch the tubing and thus compensate for the tendency of the dies to increase the wall thickness. Conversely, in proceeding from 62 to 63, the pressure supplied to the ram 53 may be gradually decreased to compensate for the decreasing effect of the dies to increase wall thickness as they proceed from point 62 to point 63.
  • tapers are possible, the nature of the taper being governed entirely by the top edge of the template or cam 58 causing the dies to rotate in one direction or the other as required by the shape of the taper.
  • the tithing is, of course, continuously rotated and the die carrier moves progressively along the length of the bed.
  • the traverse speed which the die carrier moves its dies axially of the tubing is governed by a flow control valve, not shown, to ram 50.
  • tension which may be variable as above explained, can be continuously applied to the tubing while it is being rotated and squeezed by the dies, the tubing not only tends to remain straight but a fine finish on the exterior of the tubing is also pos- F J sible.
  • a lubricant is fed between the dies and the exterior of the tubing.
  • the mandrel 19 is adjustably mounted with respect to the hollow spindle 17 on the tailstock the position of the chuck 23 with relation to the head stock can be varied to accommodate tubings of various lengths.
  • a tube tapering machine comprising a headstock and a tailstock both of which have rotary chucks therein in which the ends of a tube may be chucked, means for rotating the chucks, a die carrier between the chucks having opposed rotary adjustable dies mounted thereon rotatable about axes transverse to the axis of rotation of the tube and presenting opposed tapered peripheral grooves which slidingly engage the tube with concave lines of contact in all positions of adjustment of the dies, means for moving the die carrier axially of the tube as it rotates, a template, means engageable with the template for rotating the dies about their respective axis oppositely but in unison as the die carrier moves between the chucks, a second template, means for moving one of the chucks relatively to the other axially of the tube, and means engageable with the second template for regulating the movement of the axially movable chuck.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US749678A 1958-07-21 1958-07-21 Tube tapering machine Expired - Lifetime US3019678A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US749678A US3019678A (en) 1958-07-21 1958-07-21 Tube tapering machine
GB22787/59A GB901844A (en) 1958-07-21 1959-07-02 Tube tapering machine
FR793366A FR1229348A (fr) 1958-07-21 1959-07-06 Machine pour la contraction des tubes en vue de leur donner une forme conique
CH7589959A CH376079A (de) 1958-07-21 1959-07-17 Verfahren und Maschine zum Herstellen von kegeligen Rohrabschnitten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US749678A US3019678A (en) 1958-07-21 1958-07-21 Tube tapering machine

Publications (1)

Publication Number Publication Date
US3019678A true US3019678A (en) 1962-02-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US749678A Expired - Lifetime US3019678A (en) 1958-07-21 1958-07-21 Tube tapering machine

Country Status (4)

Country Link
US (1) US3019678A (de)
CH (1) CH376079A (de)
FR (1) FR1229348A (de)
GB (1) GB901844A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195331A (en) * 1960-08-22 1965-07-20 United Aircraft Corp Tube drawing apparatus
US3238752A (en) * 1964-10-12 1966-03-08 Titanium Metals Corp Tube reducing apparatus
US3240045A (en) * 1962-10-15 1966-03-15 Prec Sheet Metal Inc Arrangement for contouring tubes
US3296843A (en) * 1960-08-01 1967-01-10 North American Aviation Inc Planishing method and apparatus
US3444715A (en) * 1965-06-01 1969-05-20 Precision Sheet Metal Inc Tube tapering arrangement
US3693390A (en) * 1967-11-04 1972-09-26 Brueninghaus Gmbh Stahlwerke Method and apparatus for the production of elongated conical metallic articles
EP0381116A3 (de) * 1989-02-02 1991-05-08 WEICHHART GmbH Verfahren und Vorrichtung zum Verformen von Metallrohren zu konusförmigen oder sich verjüngenden Körpern
EP0467593A1 (de) * 1990-07-20 1992-01-22 The Whitaker Corporation Verfahren und Vorrichtung zur Verarbeitung von mehreren Drahtanschlüssen
US5315854A (en) * 1990-01-30 1994-05-31 Kw Industries, Inc. Tube tapering apparatus having a variable orifice die
US5351515A (en) * 1993-01-19 1994-10-04 Sandvik Special Metals Corporation Apparatus and method for reducing the diameter of a cylindrical workpiece
EP0692322A2 (de) 1994-06-24 1996-01-17 CONTIPOLE Aluminium-Verarbeitungsgesellschaft m.b.H. Verfahren und Vorrichtung zum Verformen von Metallrohren zu konusförmigen oder sich verjüngenden Körpern
US6233991B1 (en) 1999-01-26 2001-05-22 Bryant Products, Inc. Apparatus and method for spin forming a tube
US7181845B2 (en) 2003-02-28 2007-02-27 Bryant Products, Inc. Roller with integral bearing assembly mount and method for manufacturing same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071992A (en) * 1961-01-17 1963-01-08 Pole Lite Ltd Production of variations in the profiles of metal tubes

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US683801A (en) * 1901-07-08 1901-10-01 British Mannesmann Tube Co Ltd Apparatus for step-rolling tubes.
DE521352C (de) * 1931-03-21 Meer A G Maschf Einrichtung zum Ziehen konischer Masten oder Rohre
DE521611C (de) * 1929-09-12 1931-03-27 Adolf Wintrich Dipl Ing Einrichtung zum Ziehen konischer Hohlkoerper
US1907041A (en) * 1930-04-29 1933-05-02 Tube Reducing Corp Apparatus for working metal
US1982874A (en) * 1933-08-12 1934-12-04 Hamilton Standard Propeller Co Method of tapering tubes
US2265723A (en) * 1938-04-28 1941-12-09 Metal Tube Shaping Corp Method of configuring tubing and regulating the wall thickness thereof
US2330811A (en) * 1942-01-24 1943-10-05 Metal Tube Shaping Corp Machine for configuring tubing
US2391766A (en) * 1943-03-08 1945-12-25 George E Barnhart Method of manufacturing tubes
US2537356A (en) * 1942-11-28 1951-01-09 See Fabriks Aktiebolag Rolling mill for the production of conical tubes
US2593772A (en) * 1942-12-16 1952-04-22 See Fabriks Aktiebolag Mandrel position adjustment means for pilgrim rolling mills
US2923187A (en) * 1954-03-29 1960-02-02 Bengtsson Fritz Gunnar Tube rolling mill

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE521352C (de) * 1931-03-21 Meer A G Maschf Einrichtung zum Ziehen konischer Masten oder Rohre
US683801A (en) * 1901-07-08 1901-10-01 British Mannesmann Tube Co Ltd Apparatus for step-rolling tubes.
DE521611C (de) * 1929-09-12 1931-03-27 Adolf Wintrich Dipl Ing Einrichtung zum Ziehen konischer Hohlkoerper
US1907041A (en) * 1930-04-29 1933-05-02 Tube Reducing Corp Apparatus for working metal
US1982874A (en) * 1933-08-12 1934-12-04 Hamilton Standard Propeller Co Method of tapering tubes
US2265723A (en) * 1938-04-28 1941-12-09 Metal Tube Shaping Corp Method of configuring tubing and regulating the wall thickness thereof
US2330811A (en) * 1942-01-24 1943-10-05 Metal Tube Shaping Corp Machine for configuring tubing
US2537356A (en) * 1942-11-28 1951-01-09 See Fabriks Aktiebolag Rolling mill for the production of conical tubes
US2593772A (en) * 1942-12-16 1952-04-22 See Fabriks Aktiebolag Mandrel position adjustment means for pilgrim rolling mills
US2391766A (en) * 1943-03-08 1945-12-25 George E Barnhart Method of manufacturing tubes
US2923187A (en) * 1954-03-29 1960-02-02 Bengtsson Fritz Gunnar Tube rolling mill

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296843A (en) * 1960-08-01 1967-01-10 North American Aviation Inc Planishing method and apparatus
US3195331A (en) * 1960-08-22 1965-07-20 United Aircraft Corp Tube drawing apparatus
US3240045A (en) * 1962-10-15 1966-03-15 Prec Sheet Metal Inc Arrangement for contouring tubes
US3238752A (en) * 1964-10-12 1966-03-08 Titanium Metals Corp Tube reducing apparatus
US3444715A (en) * 1965-06-01 1969-05-20 Precision Sheet Metal Inc Tube tapering arrangement
US3693390A (en) * 1967-11-04 1972-09-26 Brueninghaus Gmbh Stahlwerke Method and apparatus for the production of elongated conical metallic articles
EP0381116A3 (de) * 1989-02-02 1991-05-08 WEICHHART GmbH Verfahren und Vorrichtung zum Verformen von Metallrohren zu konusförmigen oder sich verjüngenden Körpern
US5315854A (en) * 1990-01-30 1994-05-31 Kw Industries, Inc. Tube tapering apparatus having a variable orifice die
EP0467593A1 (de) * 1990-07-20 1992-01-22 The Whitaker Corporation Verfahren und Vorrichtung zur Verarbeitung von mehreren Drahtanschlüssen
US5253399A (en) * 1990-07-20 1993-10-19 Amp Incorporated Method and apparatus for processing a plurality of wire leads
US5351515A (en) * 1993-01-19 1994-10-04 Sandvik Special Metals Corporation Apparatus and method for reducing the diameter of a cylindrical workpiece
EP0692322A2 (de) 1994-06-24 1996-01-17 CONTIPOLE Aluminium-Verarbeitungsgesellschaft m.b.H. Verfahren und Vorrichtung zum Verformen von Metallrohren zu konusförmigen oder sich verjüngenden Körpern
US6233991B1 (en) 1999-01-26 2001-05-22 Bryant Products, Inc. Apparatus and method for spin forming a tube
WO2002070152A1 (en) * 2000-08-01 2002-09-12 Bryant Products, Inc. An apparatus and method for spin-forming a tube
US7181845B2 (en) 2003-02-28 2007-02-27 Bryant Products, Inc. Roller with integral bearing assembly mount and method for manufacturing same

Also Published As

Publication number Publication date
CH376079A (de) 1964-03-31
FR1229348A (fr) 1960-09-06
GB901844A (en) 1962-07-25

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