EP0051121B1 - Machine de fluotournage - Google Patents

Machine de fluotournage Download PDF

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Publication number
EP0051121B1
EP0051121B1 EP81106628A EP81106628A EP0051121B1 EP 0051121 B1 EP0051121 B1 EP 0051121B1 EP 81106628 A EP81106628 A EP 81106628A EP 81106628 A EP81106628 A EP 81106628A EP 0051121 B1 EP0051121 B1 EP 0051121B1
Authority
EP
European Patent Office
Prior art keywords
spindle
tailstock
mandrel
workpiece
spinning machine
Prior art date
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
Application number
EP81106628A
Other languages
German (de)
English (en)
Other versions
EP0051121A1 (fr
Inventor
Rolf-Eckart Koch
Dieter Dr. Japs
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.)
TH Kieserling and Albrecht GmbH and Co
Original Assignee
TH Kieserling and Albrecht GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TH Kieserling and Albrecht GmbH and Co filed Critical TH Kieserling and Albrecht GmbH and Co
Publication of EP0051121A1 publication Critical patent/EP0051121A1/fr
Application granted granted Critical
Publication of EP0051121B1 publication Critical patent/EP0051121B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the invention relates to a spinning machine according to the preamble of claim 1 or claim 6.
  • the hollow cylinders to be ironed often have different wall thicknesses.
  • the z. B. is extruded blank with its bore on an ironing center centered on the machine, the outer surface of the hollow cylinder revolves eccentrically.
  • the pressure rollers which stretch the hollow cylinder with great force, have to displace different volumes of the hollow cylinder at different circumferential locations. This causes pulsatingly high forces and deformations when pressing in the spinning machine, which cause excessive stresses. These overloads lead to premature and increased wear on the spinning machine.
  • the invention has for its object to avoid the occurrence of larger imbalances while maintaining a floating bearing.
  • a first solution to this problem is given in the characterizing part of claim 1.
  • This measure does not, as usual, center the inner hollow cylindrical surface of the workpiece on the center of the machine, but rather the outer cylinder of the workpiece.
  • the workpiece is not centered by centering the ironing mandrel, but by centering the workpiece itself using the pressure rollers. This centering is self-adjusting during machining. If the wall thickness differences change over the length of the workpiece, the pressure rollers automatically readjust the workpiece.
  • the support is stationary in the transverse direction, the pressure rollers it supports are arranged on a circle centered on the center of the machine.
  • This automatic adjustment requires the ironing mandrel to be easily displaceable in the radial direction. Measures must be taken to improve the ability of the surfaces mentioned in claim 2 to be pushed forward compared to the sliding friction coefficients of known substances.
  • the radial displacement of the ironing mandrel poses particular problems in that the axial clamping force for clamping the ironing mandrel and workpiece between the work spindle and the tailstock must be very large. The resulting frictional force has to be overcome in order to achieve a radial displacement of the ironing mandrel.
  • the supports have a large space requirement, so that the actual ironing mandrel is carried by holding devices and the surfaces for the radial displacement of the ironing mandrel can only be arranged outside the ironing mandrel. Between the surfaces that should allow the radial displacement of the ironing mandrel are therefore gem.
  • Claim 3 means provided for reducing the coefficient of friction.
  • a solution according to claim 4 is preferred.
  • the spinning machine 1 shown in FIG. 1 for ironing a hollow cylindrical workpiece 2 consists of a headstock 50 with a spindle 4, a holding device 52 on the spindle 4, an ironing mandrel 8, at least 3 pressure rollers, of which only the pressure roller 7 with a roller holder 6, Shown is a further holding device 53, a tailstock 5 with a freely rotating tailstock spindle 62 therein and a clamping cylinder 9 located therein, which presses the tailstock spindle 62, the holding device 53, then the workpiece 2, the ironing mandrel 8, and the holding device 52 against the work spindle 4 .
  • the headstock 50 and the tailstock housing 66 are rigidly connected to one another by a common machine bed 3.
  • the work spindle 4 is rotatably received in the spindle box 50 in spindle bearings 47, 48 and is driven in rotation by a gearwheel 49 which is arranged on the spindle.
  • the further drive means engaging in this gearwheel 49 and the control of the work spindle 4 are not shown.
  • the axis of rotation 19 of the work spindle 4 and the center 21 of the tailstock 5 are aligned.
  • the receiving device 52 consists of a pressure plate 56 and a flange 54 encompassing the pressure plate.
  • Individual spring elements 15, 16 are arranged between the edge of the flange 54 and the circumference of the pressure plate 56.
  • the spring elements are distributed around the circumference between the pressure plate and the flange. They cause an elastic pre-centering.
  • the end face of the flange and that of the pressure plate form two parallel surfaces 22, 23, between which a plurality of balls 26 are arranged.
  • the pressure plate 56 and the flange 54 are penetrated by some bolts 11, 12, which at least on one side carry plate spring assemblies 67, 68, which cause the surfaces 22, 23 to be elastically compressed and thus hold the receiving device 52 together, and which in the flange 54 and the pressure plate 56 are angularly freely adjustable.
  • a recess is provided, into which a hollow driver, which connects the pressure plate 56 and the flange 54 in a rotationally fixed manner, is installed.
  • the driver is designed as a curved tooth coupling 20.
  • the ironing mandrel 8 is flanged centrally to the flange 54 on the receiving device.
  • the unmachined workpiece, e.g. B. a gas bottle blank 2 is pushed in a manner not shown on the ironing mandrel 8. As shown in the drawing, it has different wall thicknesses on its circumference, above and below.
  • An ejector 10 is used to release the gas bottle blank 2 from the ironing mandrel after processing.
  • the ejector is centered in the work spindle itself by the guide rings 70, 71.
  • the ironing mandrel 8 is alternatively centered by the ejector or by the spring elements 15, 16, 17, 18.
  • the roller holder 6 with the pressure roller 7 is movable in the direction of the arrows 69.
  • the pressure roller 7 is adjusted so far in the radial direction that it can stretch the gas bottle blank 2 to the desired extent.
  • the roller holder 6 is guided parallel to the spindle axis of rotation 19 over the gas bottle blank 2, the pressure roller 7 rolling on it and thereby displacing the material on its circumference, which leads to an elongation of the blank.
  • the bottom of the gas bottle blank is clamped between the end face of the ironing mandrel and a counter-holder 61 on the tailstock-side receiving device 53. Between this counterhold and the tailstock spindle 62 there are two flat parallel surfaces 24, 25 in a transverse plane to the tailstock center 21, which correspond to the surfaces 22, 23 on the side of the work spindle 4. The function is analogous to the receiving device 52.
  • the tailstock spindle 62 is held in the tailstock housing 66 in roller bearings 63, 64 centrally to the axis of rotation 19 of the work spindle 4.
  • the tailstock spindle 62 is supported on the tailstock housing 66 in the axial direction via an axial bearing 65 and a clamping cylinder 9. Alternatively, the entire tailstock can be moved.
  • the pressure roller 6 forms with the 2 pressure rollers, not shown, a type of caliber which is pushed over it in a rolling motion.
  • the caliber is fixed in the radial direction to the axis of rotation 19 of the work spindle 4 and to the center 21 of the tailstock 5.
  • Uneven wall thicknesses of the workpiece to be machined are compensated for by a radial displacement of the ironing mandrel 8.
  • the work spindle 4 and the tailstock spindle 62 remain at their predetermined centers of rotation.
  • the workpiece moves with the ironing mandrel 8, the holding device 51 and the flange 54 on the side of the work spindle and with the counter-holder 61 and the flange 55 on the tailstock side in the radial direction.
  • the shift takes place between surfaces 22, 23 and 24, 25.
  • the coefficients of friction between these surfaces are reduced by balls 26, 27 placed between them.
  • the spring elements 15, 16, 17, 18 are deformed between the pressure plates and the flanges.
  • the spring action causes the ironing mandrel to be pre-centered automatically.
  • the ejector 10 alternatively has a centering effect, since it is centered on both sides of the surfaces 22, 23 in a plurality of guide rings 60, 70 and 71.
  • the embodiment shown in FIG. 2 can be provided. After the solution shown there, the workpiece 2 and the ironing mandrel 8 supporting it become radial to the rotation axis 19 rigidly guided.
  • Uneven wall thicknesses of the workpiece 2 are compensated for by the mobility of the pressure rollers 28, 29, 30. These three rollers shape the workpiece simultaneously and in the same transverse plane. They are supported by their roller holders 72, 73, 74 and hydraulic cylinders 31, 32, 33 on a yoke 75 which is only shown schematically.
  • the three hydraulic cylinders shown are double-acting, their pistons can be controlled in both directions.
  • the corresponding chambers of the hydraulic cylinders are interconnected. That is, all the chambers 36, 38, 40 of the cylinders on the piston rod side are connected by a line 34.
  • the chambers 35, 37, 39 on the cylinder bottom are likewise connected by a line 41 connecting them.
  • the lines 34, 41 each form a closed circuit. For reasons of overload, they are additionally protected with a pressure relief valve 42, 43 each.
  • a three-way valve 44 shows the hydraulic circuit in the working position, in which both lines 34, 41 are separated from the tank 46 and from the pump 45. The other two positions of the three-way valve serve to open and move the rollers 28, 29, 30.
  • the hydraulic motor 45 is short-circuited to the reservoir 46 in the working phase of the pressure rollers 28, 29, 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (6)

1. Machine de fluotournage (1) pour le fluotournage de pièces en forme de cylindre creux (2) et comportant un bâti (3), une broche (4) et une contre-poupée (5) montées sur le bâti (3), un ou plusieurs supports (6) qui, portant les rouleaux de serrage (7), se déplacent sur ce même bâti et se trouvent situés entre la contre-poupée et la broche, un mandrin (8) non rotatif, fixé sur la broche, ainsi que des éléments de fixation (9) du mandrin permettant de maintenir celui-ci entre la contre-poupée et la broche de travail, avec la possibilité d'assurer le centrage automatique de la pièce à usiner et de l'ouverture de passage entre les rouleaux (7, 28, 29, 30), de manière que le centre (21) de la contre-poupée et l'axe de rotation (19) de la broche de travail se trouvent placés dans un même alignement, caractérisée en ce que le mandrin (8) coulisse dans le sens radial par rapport à l'axe de rotation (19) de la broche et peut être réglé pendant le processus d'usinage par rapport à la pièce à usiner et aux rouleaux de serrage.
2. Machine de fluotournage selon la revendication 1, caractérisée en ce que de chaque côté du mandrin (8) se trouvent deux surfaces (22, 25) qui, coulissant les unes par rapport aux autres, sont placées dans un plan transversal par rapport à l'axe de rotation (19) de la broche.
3. Machine de fluotournage selon la revendication 2, caractérisée en ce que de chaque côté du mandrin (8) se trouvent au moins deux surfaces qui coulissent les unes par rapport aux autres, sont placées dans un plan transversal par rapport à l'axe de rotation (19) de la broche et dont le coefficient de friction est réduit à l'aide d'éléments intercalés (26, 27).
4. Machine de fluotournage selon une ou plusieurs des revendications 1 et 2, caractérisée en ce qu'entre les surfaces (22 ... 25) placées dans le plan transversal par rapport à l'axe de rotation de la broche, se trouvent des paliers à roulement (26, 27).
5. Machine de fluotournage selon l'une ou plusieurs des revendications 1 et 2, caractérisée par des éléments de centrage (15 ... 18) qui sont placés dans le sens radial par rapport à l'axe de rotation (19) de la broche et qui assurent la suspension élastique du mandrin.
6. Machine de fluotournage (1) pour le fluotournage de pièces en forme de cylindre creux (2) et comportant un bâti (3), une broche (4) et une contre-poupée (5) montées sur le bâti (3), un ou plusieurs supports (6) qui, portant les rouleaux de serrage (7), sont maintenus dans des paliers flottant par rapport au bâti (3) et qui sont reliés à une commande hydraulique par l'intermédiaire de cylindres appropriés, un mandrin (8) et des éléments de fixation (9) et de centrage (10, 15 ... 18) du mandrin entre la contre-poupée et la broche de travail, de manière que le centre (21) de la contre-poupée et l'axe de rotation (19) de la broche de travail se trouvent dans un même alignement, caractérisée en ce que, pour réaliser la suspension par paliers flottants, les rouleaux d'appui (28 ... 30) sont reliés à un circuit d'alimentation commun (34, 41), par un branchement en parallèle des cylindres hydrauliques.
EP81106628A 1980-11-03 1981-08-26 Machine de fluotournage Expired EP0051121B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3041267 1980-11-03
DE19803041267 DE3041267A1 (de) 1980-11-03 1980-11-03 Drueckmaschine

Publications (2)

Publication Number Publication Date
EP0051121A1 EP0051121A1 (fr) 1982-05-12
EP0051121B1 true EP0051121B1 (fr) 1984-09-26

Family

ID=6115771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106628A Expired EP0051121B1 (fr) 1980-11-03 1981-08-26 Machine de fluotournage

Country Status (5)

Country Link
EP (1) EP0051121B1 (fr)
DD (1) DD208091A1 (fr)
DE (2) DE3041267A1 (fr)
ES (1) ES506789A0 (fr)
WO (1) WO1982001487A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559078B1 (fr) * 1984-02-02 1988-03-25 Vallourec Procede de realisation d'une collerette annulaire sur le fond d'un recipient de revolution
CN102069122A (zh) * 2010-12-14 2011-05-25 大连瑞谷科技有限公司 圆柱滚子铜保持架滚动锁口工艺
GB201110349D0 (en) 2011-06-20 2011-08-03 Rolls Royce Plc Support structure forming method
ES2665845T3 (es) 2015-10-20 2018-04-27 Leifeld Metal Spinning Ag Máquina de conformación para presionar/laminar a presión y procedimiento para presionar/laminar a presión
CN106807820A (zh) * 2017-03-29 2017-06-09 浙江金盾消防器材有限公司 一种用于旋压拉伸瓶体的工装及其加工方法
CN106807819A (zh) * 2017-03-29 2017-06-09 浙江金盾消防器材有限公司 一种拉伸旋压瓶体及其加工工装

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180024A (en) * 1961-02-13 1965-04-27 Crucible Steel Co America Metal working process and apparatus
FR1413003A (fr) * 1964-11-03 1965-10-01 Cincinnati Milling Machine Co Procédé de fabrication d'un article métallique creux muni d'une gorge annulaire
DE1527939A1 (de) * 1966-12-22 1969-11-20 Messerschmitt Boelkow Blohm Kopierwerkzeugmaschine
US3517535A (en) * 1968-07-09 1970-06-30 Parsons Corp Method and apparatus for roll-extruding large diameter thin-walled tubing
JPS5148456B2 (fr) * 1972-11-09 1976-12-21
JPS51143566A (en) * 1975-06-04 1976-12-09 Fuji Machine Mfg Method and equipment for making metallic bats

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Z.ind. Fertigung 62 (1972), S. 660-662 (Heft 11) *

Also Published As

Publication number Publication date
DE3041267A1 (de) 1982-08-19
ES8306038A1 (es) 1982-10-01
WO1982001487A1 (fr) 1982-05-13
ES506789A0 (es) 1982-10-01
EP0051121A1 (fr) 1982-05-12
DD208091A1 (de) 1984-03-28
DE3166336D1 (en) 1984-10-31

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