EP3953079A1 - Procédé de fabrication d'un arbre creux - Google Patents

Procédé de fabrication d'un arbre creux

Info

Publication number
EP3953079A1
EP3953079A1 EP20717631.4A EP20717631A EP3953079A1 EP 3953079 A1 EP3953079 A1 EP 3953079A1 EP 20717631 A EP20717631 A EP 20717631A EP 3953079 A1 EP3953079 A1 EP 3953079A1
Authority
EP
European Patent Office
Prior art keywords
preform
hollow shaft
workpiece holder
tubular
forming
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.)
Granted
Application number
EP20717631.4A
Other languages
German (de)
English (en)
Other versions
EP3953079B1 (fr
Inventor
Bernd RUDERT
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.)
Winkelmann Powertrain Components GmbH and Co KG
Original Assignee
Winkelmann Powertrain Components GmbH and Co KG
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 Winkelmann Powertrain Components GmbH and Co KG filed Critical Winkelmann Powertrain Components GmbH and Co KG
Publication of EP3953079A1 publication Critical patent/EP3953079A1/fr
Application granted granted Critical
Publication of EP3953079B1 publication Critical patent/EP3953079B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • 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
    • 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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/063—Making machine elements axles or shafts hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/066—Making machine elements axles or shafts splined

Definitions

  • the invention relates to a method for producing a hollow shaft from a tubular preform by spinning, wherein both ends of the preform are each formed with at least one forming roller.
  • Such a method is known from DE 103 37 929 A1.
  • This document be writes a process for the production of one-piece hollow bodies with profiled end regions from a preform with a circular tube cross-section, the preform being stretched in its central region in a first process step. After completion of this ironing step, the preform is inserted into another workpiece holder and then at least one end area is ironed in a second method step and this end area is optionally further processed in a third method step.
  • this known method is relatively expensive, since it is necessary for the implementation of the various process steps to hold the preform or the partially already formed preform one after the other in different workpiece holders, so that a continuous forming process is not possible.
  • a complex adjustment is required to ensure exact concentricity of the preform with the forming rollers.
  • the method is limited to tubular preforms which can be ironed by spinning.
  • the object of the invention is to further develop such a method in such a way that it enables a continuous process sequence and can be used universally.
  • This object is achieved according to the invention in a method of the type mentioned in that a tubular preform with a round or polygonal cross-section is used and the preform is held by a workpiece holder in the middle pipe area during the entire manufacturing process up to the finished hollow shaft.
  • the method makes it possible to carry out the entire forming process with just one workpiece holder, so that the entire forming process can run continuously. This also eliminates the need for additional adjustments that would be required when changing the workpiece holder.
  • tubular preforms with a round (annular) or polygonal cross-section, so that the hollow shaft produced in this way is suitable for various purposes, e.g. for holding winding packages in an electric motor.
  • the preform is set in rotary motion relative to the at least one deformation roller, for which purpose the workpiece holder with the preform and / or the at least one deformation roller is driven.
  • the middle pipe area which is held by the workpiece holder, remains unchanged, while only the end areas are reshaped in a rotationally symmetrical manner, so that the middle area e.g. Winding packages of an electric motor can take up. Since the middle area is not reshaped, no inner mandrel is required in the middle area, but inner mandrels are only used in the two end areas, while the preform is held in the middle area from the outside by a workpiece holder.
  • Both drawn and welded tubes can be used as preforms.
  • the two ends of the preform are at least partially reshaped at the same time. On the one hand, this shortens the forming time and, on the other hand, results in a torque neutralization in the middle of the tube.
  • at least one end is stepped one or more times, ie axially adjoining areas with different diameters are produced.
  • an outer and / or inner profile is introduced into at least one end.
  • the finished hollow shaft is to have an external or internal profile at both ends, provision is accordingly made for a mandrel to be inserted into both ends.
  • a mandrel to be inserted into both ends.
  • To introduce an outer profile at least one correspondingly profiled forming roller and a non-profiled inner mandrel and for introducing an inner profile, at least one non-profiled order forming roller and a profiled inner mandrel are used.
  • the two inner mandrels are connected to one another in a force-locking and / or form-locking manner at the end.
  • the front ends of the two inner mandrels can e.g. have a spur toothing and are axially pressed against each other and thereby locked, so that lateral radial forces can be absorbed.
  • the deformation takes place at least temporarily with the application of heat.
  • the heat can be generated inductively, for example, and this application of heat can harden the component at the same time.
  • Fig. 2 is a section along the line A-A in Fig. 1 with three different implementation forms
  • FIG. 3 shows a perspective illustration of the preform held in a central tube region by a workpiece holder during the forming process
  • FIG. 4 is a side view of FIG. 3, partly in longitudinal section,
  • FIG. 8 shows a longitudinal section through a hollow shaft during the forming process using two divided inner mandrels
  • FIG. 9 shows a modification of FIG. 8 with two inner mandrels that are positively connected to one another in the axial direction
  • FIG. 10 shows a perspective view of the two inner mandrels according to FIG. 9,
  • FIG. 11 shows an end region of a preform with a shaping roller which applies a radial and axial force
  • FIG. 12 shows a perspective illustration of FIG. 11.
  • a tubular preform is indicated generally by 1 in FIG.
  • This rohrför shaped preform 1 can be a drawn or welded tube made of metal.
  • the tubular preform can have any round or polygonal cross section.
  • FIG. 2 it is indicated by way of example that it can have a circular, square or triangular cross section.
  • any cross-sectional shapes preferably polygonal cross-sectional shapes, are possible in adaptation to the respective application.
  • the central tube area la of the tubular preform 1 is not reshaped, this area is e.g. Suitable for receiving winding stacks of an electric motor or the like without further processing.
  • the tubular preform 1 is held by a workpiece holder 2 in its central pipe region la over the entire manufacturing process up to the finished hollow shaft.
  • This divided, ring-shaped workpiece holder 2 accordingly has an inner contour which corresponds to the outer contour of the tubular preform 1.
  • the entire process can be performed continuously without changing to another workpiece holder.
  • the two ends lb and lc of the preform 1 are at least partially formed simultaneously by means of forming rollers generally designated 3.
  • at least one forming roller 3 is provided for forming each of the two ends lb, lc.
  • three forming rollers 3 are indicated for the forming of the end lb and one forming roller 3 of the end lc.
  • the forming rollers 3 are, based on the longitudinal axis 4 of the preform 1, designed to be radially movable ver. Depending on the desired forming process, they can also be moved in the axial direction.
  • the pressure rollers 3 are rotated relative to the workpiece holder 2 and the tubular preform 1, so that either the pressure rollers 3 or the workpiece holder 2 with the preform 1 are driven.
  • the two ends 1b and 1c of the preform 1 are deformed in a rotationally symmetrical manner, i.e. the two ends lb and lc then no longer have a polygonal cross-sectional shape when the original preform 1 had a polygonal cross-section.
  • the polygonal cross section is of course retained in the unprocessed central area la.
  • the two ends lb and lc can be reshaped without changing the workpiece holder 2.
  • Fig. 5 it is shown that the two ends lb and lc see ge in the radial direction are each designed with two steps. These stepped areas are denoted in FIG. 5 by lb ', lb "and lc', lc", respectively.
  • a profile is introduced into the two ends lb and lc, namely in the end lb egg ne inner profile 5 and on the end lc an outer profile 6.
  • the inner profile 5 and the outer profile 6 can be a toothing, a Ränd development or another be geometric shape.
  • suitable forming rollers are used as forming rollers and internal mandrels.
  • FIG. 1 Another possible embodiment is shown in FIG.
  • the preform 1 is held unchanged in its central area la in the workpiece holder 2 and in the already stepped end lb an inner mandrel 7 is axially out without profiling, while in the end lc an inner mandrel 8 with outer profiling 8a is inserted.
  • an inner mandrel 7 In order to introduce an outer profile 6 at the end lb of the preform 1 in the embodiment according to FIG. 8, in addition to the inner mandrel 7, at least one forming roller 9 with an outer profile 9a is provided.
  • At least one forming roller 10 without outer profiling is provided, ie the end lc is pressed by the forming roller 10 into the outer profile 8a of the inner mandrel 8 so that the inner profile 5 is created.
  • two separate inner mandrels 7 and 8 are not used, but the two inner mandrels 7 'and 8' are connected to one another at the end and / or in a form-fitting manner.
  • the two inner mandrels 7 'and 8' each have complementary face teeth 7a, 8a.
  • the inner mandrels 7 'and 8' are then compressed in the axial direction during the deformation by pressure on the outside, as a result of which lateral radial forces occurring during the deformation are intercepted.
  • FIGS. 11 and 12 It is also possible to replenish metal material at at least one of the two ends 1b, 1c of the preform 1 during the deformation (in the deformation zone) when an axial force is applied to the respective end 1b or 1c.
  • This forming process is shown in FIGS. 11 and 12.
  • at least one forming roller 11 is used, which has a step-shaped, tubular outer circumferential area with a circumferential contact surface 11a.
  • an axial force F aX iai and a radial force F radiai are applied to the preform 1.
  • This material tracking can also be carried out several times, for example before the actual deformation of the ends 1b, 1c and afterwards.
  • the entire manufacturing process can be done by cold forming alone. All or at times, however, the deformation can also take place with the application of heat, for example by means of inductive heat generation. As a result, the preform 1 can harden at the same time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un arbre creux à partir d'une préforme tubulaire par fluotournage. Selon l'invention, les deux extrémités de la préforme sont respectivement façonnées avec au moins un rouleau de formage, la préforme utilisée est une préforme tubulaire (1) ayant une section transversale ronde ou polygonale, et la préforme (1) est maintenue sur un porte-pièce (2) dans la zone centrale du tube (1a) pendant tout le processus de fabrication jusqu'à l'arbre creux fini.
EP20717631.4A 2019-04-08 2020-04-06 Procédé de fabrication d'un arbre creux Active EP3953079B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019109183.7A DE102019109183A1 (de) 2019-04-08 2019-04-08 Verfahren zur Herstellung einer Hohlwelle
PCT/EP2020/059743 WO2020207960A1 (fr) 2019-04-08 2020-04-06 Procédé de fabrication d'un arbre creux

Publications (2)

Publication Number Publication Date
EP3953079A1 true EP3953079A1 (fr) 2022-02-16
EP3953079B1 EP3953079B1 (fr) 2024-06-05

Family

ID=70224377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20717631.4A Active EP3953079B1 (fr) 2019-04-08 2020-04-06 Procédé de fabrication d'un arbre creux

Country Status (6)

Country Link
US (1) US20220219218A1 (fr)
EP (1) EP3953079B1 (fr)
JP (1) JP2022527535A (fr)
CN (1) CN111790801A (fr)
DE (1) DE102019109183A1 (fr)
WO (1) WO2020207960A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021103704B3 (de) * 2021-02-17 2022-05-19 GFU - Maschinenbau GmbH Gesellschaft für Umformung und Maschinenbau Verfahren zum Herstellen einer einteiligen Hohlwelle aus einem rohrförmigen Werkstück aus Metall, damit hergestellte Hohlwelle und Vorrichtung sowie deren Verwendung
DE102021105744A1 (de) 2021-03-10 2022-09-15 Winkelmann Powertrain Components GmbH & Co. KG. Rotorhohlwelle
DE102021106672A1 (de) 2021-03-18 2022-09-22 Winkelmann Powertrain Components GmbH & Co. KG. Verfahren zur Herstellung einer Hohlwelle
DE102021127200B3 (de) 2021-10-20 2022-12-08 Thyssenkrupp Steel Europe Ag Verfahren und Drückwalzmaschine zur Herstellung einer drückgewalzten Hohlwelle
KR20230081672A (ko) * 2021-11-30 2023-06-07 이티에이 그린 파워 리미티드 모터 회전자 및 그 제조방법
CN115229017B (zh) * 2022-06-24 2024-06-21 中国石油大学(华东) 一种异形对轮旋压机

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DE2551156A1 (de) * 1975-11-14 1977-05-26 Hermanns Gebr Kremo Werke Verfahren und vorrichtung zur herstellung von kreisquerschnitt-hohlkoerpern mit in laengsachse verlaufenden inneren nuten, rillen oder kerben
SE435906B (sv) * 1981-02-03 1984-10-29 Ffv Affersverket Dorn for kallsmidning av invendigt profilerade ror eller hylsor
JPH0811261B2 (ja) * 1993-03-09 1996-02-07 橋田技研工業株式会社 瓶状金属容器の底付け加工方法とその装置
DE19532953A1 (de) * 1995-09-07 1997-03-13 Dynamit Nobel Ag Verfahren und Vorrichtung zur Herstellung von drückgewalzten Rohren mit inneren Wandverdickungen
JP3455892B2 (ja) * 1996-04-19 2003-10-14 株式会社久保田鉄工所 段状回転体の製造方法
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US6233993B1 (en) * 1999-05-10 2001-05-22 Sango Co., Ltd. Method and apparatus for forming a processed portion of a workpiece
JP2002035880A (ja) * 2000-07-18 2002-02-05 Uk:Kk 中空部品の製造方法
JP2002239657A (ja) * 2001-02-09 2002-08-27 Sango Co Ltd 管のスピニング加工方法
JP2003074336A (ja) * 2001-09-03 2003-03-12 Aisin Takaoka Ltd 排気ガス浄化装置及びその製造方法
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DE10337929A1 (de) * 2003-08-14 2005-03-17 Willy Voit Gmbh & Co. Verfahren zur Herstellung von einteiligen Hohlkörpern mit profilierten Endbereichen, Hohlkörper und Verwendung der Hohlkörper
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Also Published As

Publication number Publication date
WO2020207960A1 (fr) 2020-10-15
DE102019109183A1 (de) 2020-10-08
CN111790801A (zh) 2020-10-20
EP3953079B1 (fr) 2024-06-05
JP2022527535A (ja) 2022-06-02
US20220219218A1 (en) 2022-07-14

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