US20040168496A1 - Apparatus for manufacturing a formed body having a concentric hub - Google Patents
Apparatus for manufacturing a formed body having a concentric hub Download PDFInfo
- Publication number
- US20040168496A1 US20040168496A1 US10/793,246 US79324602A US2004168496A1 US 20040168496 A1 US20040168496 A1 US 20040168496A1 US 79324602 A US79324602 A US 79324602A US 2004168496 A1 US2004168496 A1 US 2004168496A1
- Authority
- US
- United States
- Prior art keywords
- mandrel
- hub
- round blank
- pressure surface
- roller
- 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.)
- Abandoned
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 229940090441 infed Drugs 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Images
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
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
-
- 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
- B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
-
- 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
- B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
- B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
Definitions
- This invention relates to an apparatus for manufacturing a formed body having a concentric hub from a round blank, with a rotating tool plate on which the round blank lies.
- Formed bodies manufactured with such apparatus find use in many application areas.
- the chipless manufacturing method known as flow-forming is usually a cold deformation method and is distinguished by a variety of advantages permitting, in particular, rational and economical manufacturing for mass-produced articles such as are used for example as transmission parts in automobile making.
- An apparatus of the stated type is known for example from WO 94/20235.
- a formed body provided with a concentric hub is manufactured by flow-forming from a round metal blank, that is, a sheet-metal plate having a central hole.
- material from the round blank is squeezed out by radial infeeding and displaced in the direction of the mandrel, where it is shaped into a hub by shaping against the mandrel.
- material displacement which can also be called flow
- the thickness of the round blank is reduced in accordance with the material removal necessary for hub shaping.
- the follower roller serves first to prevent flexing of the round blank during flow-forming and second to perform an exact shaping against the mandrel.
- the follower roller follows the work roller at a close interval.
- the work rollers are fashioned such that their circumferential pressure surface lies parallel to the central longitudinal axis of the mandrel or of the round blank, the pressure surface directly adjoining the flow-forming edge, which can be brought into engagement with the round blank.
- the material separated from the round blank builds up in front of the pressure surface and is displaced into the region of the mandrel, where it flows along the mandrel until it reaches a stop that controls the height of the hub.
- the hub so far preshaped is not indeed pressed directly against the mandrel by the work roller. This is effected by the follower roller, whose pressure surface lies parallel to the central longitudinal axis and with which the hub, previously slightly oblique or takes on a somewhat funnel-like shape, presses against the mandrel in such a way that a cylindrical shape comes about.
- the follower roller has a projection for the end limitation of the hub, against which projection the hub abuts with its free end face during shaping.
- the mandrel here can likewise have a stop in the shape of a shoulder that limits the height of the hub and lies in the same plane, parallel to the round blank, as the projection of the pressure roller.
- the width of the projection and of the shoulder are preferably equally large but together equal to at most the wall thickness of the hub.
- the hub is initially shaped by the work roller in a funnel shape with its wall positioned obliquely outwardly relative to the central axis of the mandrel and is afterward brought to a cylindrical shape by pressing of the wall against the mandrel by the follower roller.
- the single figure shows a partial section through an apparatus according to the invention in a schematic longitudinal section.
- the figure depicts an apparatus for manufacturing a formed body 1 having a concentric hub 12 , which apparatus has a rotating tool plate 2 in the shape of a chuck, a work roller 4 , a follower roller 7 , and a mandrel 3 .
- Tool plate 2 has a recess in which there lies a round blank 11 onto which hub 12 can be shaped by work roller 4 and follower roller 7 , to which end work roller 4 can be infed axially and radially relative to the central axis of round blank 11 .
- this pressure surface is inclined outwardly relative to the longitudinal axis of mandrel 3 so that an initially roughly funnel-shaped hub is fashioned, as illustrated at the right in the figure.
- the inclination angle ⁇ of pressure surface 6 is preferably 3-5°.
- Follower roller 7 follows immediately behind work roller 4 , being supported against the correspondingly formed surface of round blank 11 .
- follower roller 7 also has a pressure surface 13 , which, however, lies parallel to the central axis of mandrel 3 . Initially inclined hub 12 is pressed against mandrel 3 by this pressure surface and comes into abutment there so that a concentric cylindrical shape of hub 12 is generated.
- follower roller 7 On its side facing away from round blank 11 , follower roller 7 has a projection 8 that represents an end limitation in the fashioning of hub 12 and governs its height dimension.
- mandrel 3 has a circumferential shoulder 9 , which likewise forms a stop against which hub 12 abuts.
- the respective stop surfaces of shoulder 9 and projection 8 lie in one plane.
- annular gap 10 is formed between projection 8 and mandrel 3 , into which gap excess material can flow during hub shaping, so that an otherwise exact fashioning of hub 12 is possible without any problem. This excess can subsequently be removed by machining.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Adornments (AREA)
- Manufacture Of Motors, Generators (AREA)
- Forging (AREA)
Abstract
An apparatus for manufacturing a formed body having a concentric hub. The concentric hub is formed from a round blank, with a rotating tool plate on which the round blank lies, a work roller and a follower roller capable of being infed axially and/or radially for shaping of the hub about a concentrically arranged mandrel. The work roller has a pressure surface on its side facing toward the mandrel, against which pressure surface material of the round blank is removed in flow-forming abuts. The pressure surface is inclined outwardly relative to the central axis of the mandrel.
Description
- 1. Field of the Invention
- This invention relates to an apparatus for manufacturing a formed body having a concentric hub from a round blank, with a rotating tool plate on which the round blank lies.
- 2. Description of Prior Art
- Formed bodies manufactured with such apparatus find use in many application areas. The chipless manufacturing method known as flow-forming is usually a cold deformation method and is distinguished by a variety of advantages permitting, in particular, rational and economical manufacturing for mass-produced articles such as are used for example as transmission parts in automobile making.
- An apparatus of the stated type is known for example from WO 94/20235. There a formed body provided with a concentric hub is manufactured by flow-forming from a round metal blank, that is, a sheet-metal plate having a central hole.
- With the aid of the work roller, material from the round blank is squeezed out by radial infeeding and displaced in the direction of the mandrel, where it is shaped into a hub by shaping against the mandrel. In the course of material displacement, which can also be called flow, the thickness of the round blank is reduced in accordance with the material removal necessary for hub shaping.
- While the work roller effects on the one hand the removal of material from the round blank and on the other hand the movement of the material in the direction of the mandrel, the follower roller serves first to prevent flexing of the round blank during flow-forming and second to perform an exact shaping against the mandrel. The follower roller follows the work roller at a close interval.
- In the known apparatus the work rollers are fashioned such that their circumferential pressure surface lies parallel to the central longitudinal axis of the mandrel or of the round blank, the pressure surface directly adjoining the flow-forming edge, which can be brought into engagement with the round blank.
- In the axial and radial infeed of the work roller, the material separated from the round blank builds up in front of the pressure surface and is displaced into the region of the mandrel, where it flows along the mandrel until it reaches a stop that controls the height of the hub.
- In the stated material buildup, however, very large forces arise at the pressure surface, which forces act on the work roller and not only necessitate corresponding sizing of the corresponding mechanical components but also lead to relatively high wear.
- It has been found that the upset material does not flow parallel or nearly parallel to the mandrel until immediately before coming to abut against the mandrel, while before this time it takes on the space of a relatively thick bulge.
- It is therefore a goal of the invention to fashion an apparatus of the stated type so that the loads occurring during flow-forming are reduced.
- This goal is achieved by an apparatus that has the features of claim1 and/or a method according to
claim 10. - It has surprisingly been found that a substantially smaller bulge-like material buildup is thus attained in the radial infeed of the work roller. Instead, the material separated from the round blank by the work roller flows along the pressure surface at an early time, so that a much smaller loading or a reduction in the force that must be expended for flow-forming results in a natural way. This is as much as 40% less than in flow-forming according to the prior art, given an optimized design of the work roller, which in an advantageous development of the invention provides an inclination of <10°, preferably 3-5°.
- The hub so far preshaped is not indeed pressed directly against the mandrel by the work roller. This is effected by the follower roller, whose pressure surface lies parallel to the central longitudinal axis and with which the hub, previously slightly oblique or takes on a somewhat funnel-like shape, presses against the mandrel in such a way that a cylindrical shape comes about.
- According to a further idea of the invention, the follower roller has a projection for the end limitation of the hub, against which projection the hub abuts with its free end face during shaping.
- The mandrel here can likewise have a stop in the shape of a shoulder that limits the height of the hub and lies in the same plane, parallel to the round blank, as the projection of the pressure roller.
- It is also conceivable, however, to fashion the mandrel with a smooth shank throughout, so that here only the follower roller forms the end limitation of hub shaping.
- In order to optimize production, it is further provided to leave between the stop-forming projection of the follower roller and the mandrel a small annular gap into which excess material can pass during hub shaping, which excess material is removed in subsequent hub machining.
- The width of the projection and of the shoulder are preferably equally large but together equal to at most the wall thickness of the hub.
- In a method for chipless manufacturing of the hubbed formed body from a round blank according to the preamble of
claim 10, the hub is initially shaped by the work roller in a funnel shape with its wall positioned obliquely outwardly relative to the central axis of the mandrel and is afterward brought to a cylindrical shape by pressing of the wall against the mandrel by the follower roller. - Further advantageous developments of the invention are characterized in the dependent claims.
- In what follows, an exemplary embodiment of the invention is described on the basis of the appended drawings.
- The single figure shows a partial section through an apparatus according to the invention in a schematic longitudinal section.
- The figure depicts an apparatus for manufacturing a formed body1 having a
concentric hub 12, which apparatus has a rotating tool plate 2 in the shape of a chuck, a work roller 4, afollower roller 7, and a mandrel 3. - Tool plate2 has a recess in which there lies a round blank 11 onto which
hub 12 can be shaped by work roller 4 andfollower roller 7, to which end work roller 4 can be infed axially and radially relative to the central axis of round blank 11. - For shaping, initially disk-shaped round blank11 with a central hole is laid into tool plate 2 and set in rotation. Material of round blank 11 that initially protrudes above tool plate 2 is squeezed in the direction of mandrel 3 by a pressure edge of work roller 4, the material so separated being supported against a
pressure surface 6 of work roller 4. - Starting from round blank11, this pressure surface is inclined outwardly relative to the longitudinal axis of mandrel 3 so that an initially roughly funnel-shaped hub is fashioned, as illustrated at the right in the figure.
- The inclination angle α of
pressure surface 6 is preferably 3-5°. -
Follower roller 7 follows immediately behind work roller 4, being supported against the correspondingly formed surface of round blank 11.Follower roller 7 also has apressure surface 13, which, however, lies parallel to the central axis of mandrel 3. Initially inclinedhub 12 is pressed against mandrel 3 by this pressure surface and comes into abutment there so that a concentric cylindrical shape ofhub 12 is generated. - On its side facing away from round blank11,
follower roller 7 has aprojection 8 that represents an end limitation in the fashioning ofhub 12 and governs its height dimension. - In this sense, mandrel3 has a
circumferential shoulder 9, which likewise forms a stop against which hub 12 abuts. The respective stop surfaces ofshoulder 9 andprojection 8 lie in one plane. - As can further be seen, an
annular gap 10 is formed betweenprojection 8 and mandrel 3, into which gap excess material can flow during hub shaping, so that an otherwise exact fashioning ofhub 12 is possible without any problem. This excess can subsequently be removed by machining.
Claims (10)
1. An apparatus for manufacturing a formed body having a concentric hub from a round blank, with a rotating tool plate on which the round blank lies, a work roller and a follower roller capable of being infed axially and/or radially for shaping of the hub about a concentrically arranged mandrel, the work roller having a pressure surface on its side facing toward the mandrel, against which pressure surface material of the round blank removed in flow-forming abuts, characterized in that the pressure surface is inclined outwardly relative to the central axis of the mandrel, specifically starting from the round blank.
2. Apparatus according to claim 1 , characterized in that the inclination of the pressure surface is <10° relative to the longitudinal axis of the mandrel.
3. Apparatus according to claim 2 , characterized in that the inclination of the pressure surface is 3-5°.
4. Apparatus according to claim 1 , characterized in that the follower roller has a projection against which the hub abuts in final position.
5. Apparatus according to claim 1 , characterized in that the mandrel has a circumferential shoulder to limit the height of the hub.
6. Apparatus according to claim 4 , characterized in that the shoulder and the projection lie in one plane.
7. Apparatus according to claim 6 , characterized in that the width of the shoulder and the width of the projection are equally large.
8. The apparatus according to claim 1 , characterized in that the width of the shoulder and of the projection together are equal to or less than the thickness of the wall of the hub.
9. Apparatus according to claim 3 , characterized in that an annular gap is formed between the projection and the mandrel in final shaping position of the follower roller.
10. A method for chipless manufacturing of a formed body having a hub from a round blank in which the round blank in rotating with respect to at least one work roller is reduced in thickness radially and/or axially from the outside inwardly by pressing with the work roller and the material removed is shaped about a centrically arranged cylindrical mandrel to make the hub, characterized in that the hub is initially shaped by the work roller in a funnel shape with its wall positioned obliquely outwardly relative to the central axis of the mandrel and is afterward brought to a cylindrical shape by pressing of the wall against the mandrel by a follower roller.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10144834A DE10144834A1 (en) | 2001-09-12 | 2001-09-12 | Concentric-hub shaped body producing device has application surface sloping relative to central axis of tool pin |
DE10144834.1 | 2001-09-12 | ||
PCT/EP2002/009994 WO2003022483A1 (en) | 2001-09-12 | 2002-09-06 | Device for producing a shaped body that has a concentric hub |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040168496A1 true US20040168496A1 (en) | 2004-09-02 |
Family
ID=7698718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/793,246 Abandoned US20040168496A1 (en) | 2001-09-12 | 2002-09-06 | Apparatus for manufacturing a formed body having a concentric hub |
Country Status (10)
Country | Link |
---|---|
US (1) | US20040168496A1 (en) |
EP (1) | EP1425120B1 (en) |
JP (1) | JP2005501732A (en) |
KR (1) | KR20040039342A (en) |
AT (1) | ATE390227T1 (en) |
CA (1) | CA2458039A1 (en) |
DE (2) | DE10144834A1 (en) |
DK (1) | DK1425120T3 (en) |
ES (1) | ES2304461T3 (en) |
WO (1) | WO2003022483A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1712310A1 (en) * | 2005-04-13 | 2006-10-18 | Repkon Machine and Tool Industry & Trade Ltd. | Method and device for forming a groove |
CN102151737A (en) * | 2011-04-25 | 2011-08-17 | 董利强 | Pulley blank spinning process |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2674080T3 (en) | 2007-01-04 | 2018-06-27 | Sk Chemicals Co., Ltd. | Polyarylene sulfide resin with excellent luminosity and preparation procedure |
CN109158469B (en) * | 2018-08-03 | 2020-05-19 | 华中科技大学 | Progressive thickening forming method for annular boss of annular plate |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5987952A (en) * | 1996-06-24 | 1999-11-23 | The Gates Corporation | Method for making a hub/pulley with a radially inward annular collar |
US6484547B1 (en) * | 1999-07-28 | 2002-11-26 | Kanemitsu Corporation | Sheet metal member and method of manufacturing the member |
US6536253B1 (en) * | 2000-03-10 | 2003-03-25 | Kanemitsu Corporation | Slotting method, slotting device, and method of manufacturing metal sheet brake shoe by slotting |
US6598443B2 (en) * | 2000-04-26 | 2003-07-29 | A. J. Rose Manufacturing Co. | Blind bore hub and method of forming |
US6647839B2 (en) * | 2000-03-14 | 2003-11-18 | Nissan Motor Co., Ltd. | Method of forming an integral tubular projection in a work by spinning and a product produced by the same |
US6691542B2 (en) * | 2000-09-26 | 2004-02-17 | Aisin Aw Co., Ltd. | Method and apparatus for manufacturing a cylindrical member, and cylindrical member having splines |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB590211A (en) * | 1944-01-31 | 1947-07-10 | Standard Telephones Cables Ltd | Methods of and means for rolling annular metal bodies |
WO1994020235A1 (en) * | 1993-03-02 | 1994-09-15 | Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg | Method for the non-cutting production of a transmission component hub |
JP2719563B2 (en) * | 1995-10-25 | 1998-02-25 | 日本イスエード株式会社 | Stepped pulley manufacturing method |
JP3387831B2 (en) * | 1998-03-09 | 2003-03-17 | 小島プレス工業株式会社 | Method of manufacturing metal product having cylindrical portion integrally formed |
DE10033089A1 (en) * | 2000-02-15 | 2001-08-23 | Wf Maschinenbau Blechformtech | Process for the non-cutting production of a component with a hub |
-
2001
- 2001-09-12 DE DE10144834A patent/DE10144834A1/en not_active Ceased
-
2002
- 2002-09-06 JP JP2003526600A patent/JP2005501732A/en active Pending
- 2002-09-06 AT AT02787476T patent/ATE390227T1/en not_active IP Right Cessation
- 2002-09-06 EP EP02787476A patent/EP1425120B1/en not_active Revoked
- 2002-09-06 US US10/793,246 patent/US20040168496A1/en not_active Abandoned
- 2002-09-06 WO PCT/EP2002/009994 patent/WO2003022483A1/en active IP Right Grant
- 2002-09-06 KR KR10-2004-7003492A patent/KR20040039342A/en not_active Application Discontinuation
- 2002-09-06 CA CA002458039A patent/CA2458039A1/en not_active Abandoned
- 2002-09-06 DE DE50211980T patent/DE50211980D1/en not_active Revoked
- 2002-09-06 ES ES02787476T patent/ES2304461T3/en not_active Expired - Lifetime
- 2002-09-06 DK DK02787476T patent/DK1425120T3/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5987952A (en) * | 1996-06-24 | 1999-11-23 | The Gates Corporation | Method for making a hub/pulley with a radially inward annular collar |
US6484547B1 (en) * | 1999-07-28 | 2002-11-26 | Kanemitsu Corporation | Sheet metal member and method of manufacturing the member |
US6536253B1 (en) * | 2000-03-10 | 2003-03-25 | Kanemitsu Corporation | Slotting method, slotting device, and method of manufacturing metal sheet brake shoe by slotting |
US6647839B2 (en) * | 2000-03-14 | 2003-11-18 | Nissan Motor Co., Ltd. | Method of forming an integral tubular projection in a work by spinning and a product produced by the same |
US6598443B2 (en) * | 2000-04-26 | 2003-07-29 | A. J. Rose Manufacturing Co. | Blind bore hub and method of forming |
US6691542B2 (en) * | 2000-09-26 | 2004-02-17 | Aisin Aw Co., Ltd. | Method and apparatus for manufacturing a cylindrical member, and cylindrical member having splines |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1712310A1 (en) * | 2005-04-13 | 2006-10-18 | Repkon Machine and Tool Industry & Trade Ltd. | Method and device for forming a groove |
CN102151737A (en) * | 2011-04-25 | 2011-08-17 | 董利强 | Pulley blank spinning process |
Also Published As
Publication number | Publication date |
---|---|
DE10144834A1 (en) | 2003-03-27 |
DK1425120T3 (en) | 2008-07-21 |
EP1425120A1 (en) | 2004-06-09 |
WO2003022483A1 (en) | 2003-03-20 |
JP2005501732A (en) | 2005-01-20 |
KR20040039342A (en) | 2004-05-10 |
ES2304461T3 (en) | 2008-10-16 |
CA2458039A1 (en) | 2003-03-20 |
ATE390227T1 (en) | 2008-04-15 |
EP1425120B1 (en) | 2008-03-26 |
DE50211980D1 (en) | 2008-05-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WF-MASCHINENBAU UND BLECHFORMTECHNIK GMBH & CO, GE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FRIESE, UDO;REEL/FRAME:015063/0702 Effective date: 20040302 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |