EP1382404A1 - Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe - Google Patents
Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe Download PDFInfo
- Publication number
- EP1382404A1 EP1382404A1 EP02013831A EP02013831A EP1382404A1 EP 1382404 A1 EP1382404 A1 EP 1382404A1 EP 02013831 A EP02013831 A EP 02013831A EP 02013831 A EP02013831 A EP 02013831A EP 1382404 A1 EP1382404 A1 EP 1382404A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- split
- splitting
- hub
- material area
- 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
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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
- 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
- B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
Definitions
- the invention relates to a method for chipless molding a cylindrical hub on a workpiece, in which a Split roll with an acute-angled separating edge to the a rotating axis of a rotating workpiece is fed and inserted Material area is split off, with the split off Material area by at least one post-forming roll cylindrical hub is finally formed.
- the invention relates continue to have a role in performing this procedure as well a pressure rolling machine with at least one split roller an acute-angled separating edge and with a chuck to pick up and hold the workpiece, using the chuck is driven to rotate relative to the split roller.
- a generic state of the art goes for example from DE 41 15 423 A1.
- a roller with an acute angle Separating edge which is also known as a splitting or cutting roller a material area in the Cross-section branched or split off in a V-shape.
- the acute-angled separating edge can do the role relatively easy to penetrate into the workpiece, so that even minimal Forming forces necessary to feed the nip roll are. Due to the low forming forces, the material structure both of the remaining radial workpiece area as well as the branched workpiece area not too much heavily burdened. In particular, the risk of formation of Structural cracks within the workpiece structure remain small.
- a method that is gentle on the workpiece is known from DE 198 49 981 A1 known, in which by means of a special forming roller a hub is formed without cutting.
- the special forming roll includes an approximately rectangular separating edge and one itself immediately adjacent compression area, its External profile of the outer peripheral contour of the hub to be molded is adjusted.
- the invention has for its object to provide a method, a roller and a flow-forming machine, which is provided with a hub structure particularly friendly and economical conformable.
- the method according to the invention is characterized in that that before the final shaping the split material area with is given a defined curve shape.
- the known methods found that when forming a V-shaped split Material area to a cylindrical hub over the axial length of the molded hub a different material structure formed. This is due to, that the material is deformed more at the free end of the hub and is claimed as in the transition area of the hub to the Workpiece body. The material also tends to shape rather towards the free end of the hub flow, so that only with a relatively large calibration effort a uniform wall thickness of the hub is established leaves.
- the material area before Final shapes in a desired manner with regard to its Outer contour and / or its wall thickness can be set a hub without extensive calibration with a high Made uniform in terms of wall thickness and material structure become.
- a cylindrical hub is in mind the invention to understand an axially projecting hub which also have gears on their outer or inner contours, Grooves, steps, etc. may have. These can be done at the same time with the final shaping without cutting.
- the procedure can be carried out as cold or hot forming.
- a particularly efficient process implementation exists according to the invention in that already when the Material area through the split roller with the curve shape is provided.
- a split roll with a corresponding External contouring to produce the curve shape used.
- curve shape in the sense of the invention is basically any deviating from a straight outer contour line Understand contour shape. As particularly useful According to the invention, however, it has been found that as a curve shape, a convex curve that is curved radially outwards Contour is provided. This can be an arc shape or be hump-shaped steps or heels, which if necessary be linked with a wall thickness thickening can.
- This convex outer contour of the intermediate hub shape the possibility is created of the external material relatively easy in the direction of the workpiece body to press, so that on the one hand the structure on the free End of the hub relieved and both the structure in the transition area the hub to the base body both in terms of a Structural strengthening as well as with regard to a uniform Training the wall thickness is improved.
- the post-forming roll and / or the intermediate form roller has an axial stop surface have through which an axial extension of the separated material area is limited.
- the axial stop surface is formed on a recess through which an outer contour and / or an axial length of the to be molded Hub is specified.
- the axial stop surface is thereby from the tool body by a distance removed, which corresponds to the length of the hub to be molded.
- An economical process implementation is according to the invention this ensures that the postforming roller and / or the intermediate form roller to the split material area is delivered even before the splitting roll Has reached the end position. This ensures that even when cutting off longer material areas, the split off Material area not in the axial direction the axial length of the hub to be molded also extends.
- the nip roll is fed radially and axially at the same time. hereby can also determine the thickness of the material area that is split off be influenced during the splitting process. For example can thereby be achieved that the split roll with increasing radial infeed axially in the Workpiece body is retracted, so that a split Material area with increasing wall thickness to Forms basic workpiece body.
- a particularly efficient way of designing the Outer contour and / or the wall thickness of the split material area according to the invention is that when splitting off the separated material area along a Side of the split roller flows, which is at least one step having.
- a split roller is provided according to the invention, which is characterized by the fact that a acute-angled separating edge adjacent side area with a defined curve shape is formed.
- the separating edge is designed so that it has a gap angle of below 45 °, preferably between 10 ° and 30 °, having.
- the web of material split off in this way can only be further radial infeed of the separating edge along the Contoured side area flow, the outer contour of the material area according to the contoured Side area of the split roller adjusts.
- At least one level is formed on the side area.
- Splitting roll can simplify the process described above Way to run.
- several Steps may be provided so that there is a corrugated material area established.
- One step leads to an increase in friction. So there can be more material near the The transition to the workpiece body remains.
- an intermediate form roller is provided according to the invention, which is characterized in that a recess with a radial stop surface through which an axial length of the hub to be molded is specified, and a circumferential shaping surface is provided, which has a concave curve shape.
- the concave curve shape corresponds to that configured concave curve shape to be formed on the hub.
- a spinning roll machine that the split roll described above and / or the intermediate form roller described above is provided.
- the rollers can radially and / or axially on the workpiece be delivered.
- a workpiece 1 which in the present Example is a flat metal blank, but also a deep-drawn one, forged, cast or otherwise preformed Workpiece can be on a chuck 45 by means of a counter-holder 43 centered on an axis of rotation 14 excited.
- a drive not shown and a spindle of a known press rolling machine the workpiece 1 set in rotation, being on the outer edge of the workpiece 1 with a conventional splitting roller 10 an acute-angled separating edge 12 is delivered.
- the radial feed of the nip roll 10 becomes a material area 3 split off approximately V-shaped, as in Fig. 1b is shown.
- the postforming roller 30 has one Recess 34 with an axial stop surface 32 and one approximately axially extending shaping surface 36. This has a defined convex contour with which a desired one Generated curve shape on an intermediate hub shape 4 becomes.
- the postforming roller 30 is with its axial stop surface 32 initially designed so that the split off Material area 3 limited in its axial extent is.
- the axial stop surface 32 has an axial Distance to the workpiece 1, which is already the axial Corresponds to the length of the hub to be molded.
- a defined intermediate hub shape 4 By radially feeding the split roller 10 and the intermediate form roller 30 to their common radial end position is a defined intermediate hub shape 4 according to Fig. 1c formed.
- a postforming roller 20 is applied radially to the final shaping of the hub the hub intermediate form 4 delivered.
- the postforming roller 20 has a recess 24 with an axial stop surface 22 on which according to the contour of the to be molded Hub 5 are designed.
- the post-forming roller 20 or the counter-holder 43 can also have gears, grooves, etc. to achieve the desired Form contours.
- FIGS. 2a and 2b Another way for a firm and reliable Forming a hub 5 at the transition to the base body 2 Workpiece 1 is shown in FIGS. 2a and 2b.
- the split roll 10 does not need to be fed on the outer edge of the workpiece 1 to become, but can also be in a medium range of Workpiece can be retracted.
- the workpiece 1 with a different wall thickness over its radial direction so that when splitting off of the material area 3 a differentiated material thickness can be achieved.
- nip roll 10 which in detail 3 is shown on a side area 16, along which the split material is guided a stage 18 is formed. This connects two in the Cross-section parallel, offset surfaces, 19a, 19b with each other.
- the first nip roller surface 19a forms with the opposite one Side area the acute-angled separating edge 12, which has a radius to reduce wear, which is preferably between 0.5 to 2 mm.
- the separated material area 3 is first on the first Split roller surface 19a performed until this accordingly the radial feed of the nip roller 10 reaches stage 18, which is preferably a step height of 0.5 to 3 mm having. Due to relatively large radii at level 18 the cleaved material flows over step 18, with a stepped radial outer contour of the split Material area 3 is created. Depending on the material and the The grading can also be delivered on the inside train more or less strong. It can also be due to an increased level 18 friction to a change in wall thickness come, as shown in Fig. 3.
- transition area between the to be molded Hub and the body of the workpiece a radial outward curve shape or a material bulge created on the split workpiece area 3, which by means of the subsequent final shaping a postforming roller 20 according to FIG. 2b to a desired one good shape of the hub 5 in the transition area to the base body 2 of the workpiece 1 leads.
- the material thickness can also be influenced the invention can be achieved in that the nip roll 10 simultaneously axially during their radial infeed is proceeded. This forms on the radially extending Base body 2 of the workpiece 1 an oblique front from, as shown in Fig. 5. This can also the wall thickness of the separated material area 3 in be influenced in a desired way.
- FIGS. 6 and 7 Further possibilities for the formation of an inventive Nip roll 10 can be seen from FIGS. 6 and 7, a side region 16 for guiding the branched Material area 3 is approximately arcuate in cross section is. Through this side area 16 one can convex curve shape on the outside of the intermediate hub shape 4 can be set. In the modification according to FIG. 7a on the split roller 10 with the arcuate side region 16 a projection 13 is arranged, which has the effect of a previously described stage or as an axial stop surface can serve.
- the split roll is provided with a relatively large deflection radius.
- the flow rate through the deflection and the associated increased friction a certain change in wall thickness of the split material reached.
- one or more steps to the side area can be used for a wide range of variants.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Bei diesen bekannten Verfahren sind jedoch relativ hohe axiale und radiale Umformkräfte auf das Werkstück auszuüben. Es sind entsprechend aufwendige Maschinen vorzusehen, wobei das Problem besteht, dass bei einer Überbeanspruchung des Materiales die anzuformende Nabe abreißen kann.
- Fig. 1a bis 1d
- schematische Querschnittsansichten zu einzelnen Verfahrensschritten einer ersten erfindungsgemäßen Verfahrensvariante;
- Fig. 2a und 2b
- schematische Querschnittsansichten zu Verfahrensschritten einer zweiten erfindungsgemäßen Verfahrensvariante;
- Fig. 3
- einen schematischen, vergrößerten Ausschnitt von Fig. 2a;
- Fig. 4
- eine ausschnittsweise Darstellung einer erfindungsgemäßen Spaltrolle;
- Fig. 5
- eine schematische Ausschnittsansicht zu einer weiteren Verfahrensvariante ähnlich der Darstellung von Fig. 3;
- Fig. 6a und 6b
- schematische Querschnittsansichten zu einzelnen Verfahrensschritten einer weiteren erfindungsgemäßen Verfahrensvariante; und
- Fig. 7a und 7b
- schematische Querschnittsansichten zu einzelnen Verfahrensschritten bei einer weiteren erfindungsgemäßen Verfahrensvariante.
Claims (13)
- Verfahren zum spanlosen Anformen einer zylindrischen Nabe (5) an einem Werkstück (1), bei dem eine Spaltrolle (10) mit einer spitzwinkeligen Trennkante (12) an das um eine Rotationsachse (14) rotierende Werkstück (1) zugestellt und ein Materialbereich (3) abgespalten wird, wobei aus dem abgespaltenen Materialbereich (3) durch mindestens eine Nachformrolle (20) die zylindrische Nabe (5) endgeformt wird,
dadurch gekennzeichnet, dass vor dem Endformen der abgespaltene Materialbereich (3) mit einer definierten Kurvenform versehen wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass bereits beim Abspalten der Materialbereich (3) durch die Spaltrolle (10) mit der Kurvenform versehen wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass nach dem Spalten und vor dem Endformen mindestens eine Zwischenformrolle (30) zugestellt wird, durch welche der abgespaltene Materialbereich (3) mit der Kurvenform versehen wird. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass als Kurvenform eine radial nach außen gewölbte, konvexe Kontur vorgesehen wird. - Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass die Nachformrolle (20) und/oder die Zwischenformrolle (30) eine axiale Anschlagfläche (22, 32) aufweisen, durch welche eine axiale Erstreckung des abgespaltenen Materialbereiches (3) begrenzt wird. - Verfahren nach Anspruch 5,
dadurch gekennzeichnet, dass die axiale Anschlagfläche (22, 32) an einer Ausnehmung (24, 34) ausgebildet ist, durch welche eine Außenkontur und/oder eine axiale Länge der anzuformenden Nabe (5) vorgegeben wird. - Verfahren nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Nachformrolle (20) und/oder die Zwischenformrolle (30) an den abgespaltenen Materialbereich (3) zugestellt wird, noch bevor die Spaltrolle (10) ihre Endposition erreicht hat. - Verfahren nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass die Spaltrolle (10) radial und gleichzeitig axial zugestellt wird. - Verfahren nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass beim Abspalten das abgespaltene Material entlang einer Seite der Spaltrolle (10) fließt, welche mindestens eine Stufe (18) aufweist. - Spaltrolle mit einer spitzwinkeligen Trennkante (12), insbesondere für ein Verfahren nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass ein sich an die spitzwinkelige Trennkante (12) anschließender Seitenbereich (16) mit einer definierten Kurvenform ausgebildet ist. - Spaltrolle nach Anspruch 10,
dadurch gekennzeichnet, dass an dem Seitenbereich (16) mindestens eine Stufe (18) ausgebildet ist. - Zwischenformrolle, insbesondere für ein Verfahren nach einem der Ansprüche 3 bis 9,
dadurch gekennzeichnet, dass eine Ausnehmung (34) mit einer radial verlaufenden Anschlagfläche (32), durch welche eine axiale Länge der anzuformenden Nabe (5) vorgegeben ist, und eine in Umfangsrichtung verlaufende Formgebungsfläche (36) vorgesehen ist, welche eine konkave Kurvenform aufweist. - Drückwalzmaschine, insbesondere zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 9,
mit mindestens einer Spaltrolle (10) mit einer spitzwinkeligen Trennkante (12) und mit einem Drückfutter (45) zum Aufnehmen und Halten des Werkstücks (1), wobei das Drückfutter (45) relativ zu der Spaltrolle (10) rotierend antreibbar ist,
dadurch gekennzeichnet, dass eine Spaltrolle (10) nach einem der Ansprüche 10 oder 11 und/oder eine Zwischenformrolle (30) nach Anspruch 12 vorgesehen ist.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20020013831 EP1382404B1 (de) | 2002-06-21 | 2002-06-21 | Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe |
DE50212149T DE50212149D1 (de) | 2002-06-21 | 2002-06-21 | Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20020013831 EP1382404B1 (de) | 2002-06-21 | 2002-06-21 | Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1382404A1 true EP1382404A1 (de) | 2004-01-21 |
EP1382404B1 EP1382404B1 (de) | 2008-04-23 |
Family
ID=29762603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020013831 Expired - Lifetime EP1382404B1 (de) | 2002-06-21 | 2002-06-21 | Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1382404B1 (de) |
DE (1) | DE50212149D1 (de) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19603773A1 (de) * | 1996-02-02 | 1996-08-08 | Leifeld Gmbh & Co | Verfahren zum Herstellen rotationssymmetrischer Körper mit Nabe |
JPH09122816A (ja) * | 1995-10-25 | 1997-05-13 | Nippon Isueede Kk | 段付きプーリーの製造方法 |
US5829291A (en) * | 1996-05-17 | 1998-11-03 | Kojima Press Industry Co., Ltd. | Apparatus and process for forming metal member including bases portion and cylindrical portion formed on outer surface of the base portion such that the cylindrical portion is integral with the base portion |
DE19849981A1 (de) * | 1998-10-29 | 1999-04-15 | Leico Werkzeugmaschb Gmbh & Co | Verfahren zum Formen einer Nabenscheibe und Drückrolle zur Verwendung beim Formen einer Nabenscheibe |
JPH11320009A (ja) * | 1998-03-09 | 1999-11-24 | Kojima Press Co Ltd | 円筒部が一体形成されてなる金属製品の製造方法 |
WO2001066278A1 (fr) * | 2000-03-10 | 2001-09-13 | Kanemitsu Corporation | Procede de refendage, dispositif de refendage et procede de fabrication d'un patin de frein en tole par refendage |
DE10121546A1 (de) * | 2001-05-03 | 2001-11-29 | Leico Werkzeugmaschb Gmbh & Co | Verfahren und Drückrolle zum Anformen einer Nabe |
-
2002
- 2002-06-21 DE DE50212149T patent/DE50212149D1/de not_active Expired - Lifetime
- 2002-06-21 EP EP20020013831 patent/EP1382404B1/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09122816A (ja) * | 1995-10-25 | 1997-05-13 | Nippon Isueede Kk | 段付きプーリーの製造方法 |
DE19603773A1 (de) * | 1996-02-02 | 1996-08-08 | Leifeld Gmbh & Co | Verfahren zum Herstellen rotationssymmetrischer Körper mit Nabe |
US5829291A (en) * | 1996-05-17 | 1998-11-03 | Kojima Press Industry Co., Ltd. | Apparatus and process for forming metal member including bases portion and cylindrical portion formed on outer surface of the base portion such that the cylindrical portion is integral with the base portion |
JPH11320009A (ja) * | 1998-03-09 | 1999-11-24 | Kojima Press Co Ltd | 円筒部が一体形成されてなる金属製品の製造方法 |
DE19849981A1 (de) * | 1998-10-29 | 1999-04-15 | Leico Werkzeugmaschb Gmbh & Co | Verfahren zum Formen einer Nabenscheibe und Drückrolle zur Verwendung beim Formen einer Nabenscheibe |
WO2001066278A1 (fr) * | 2000-03-10 | 2001-09-13 | Kanemitsu Corporation | Procede de refendage, dispositif de refendage et procede de fabrication d'un patin de frein en tole par refendage |
DE10121546A1 (de) * | 2001-05-03 | 2001-11-29 | Leico Werkzeugmaschb Gmbh & Co | Verfahren und Drückrolle zum Anformen einer Nabe |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 09 30 September 1997 (1997-09-30) * |
Also Published As
Publication number | Publication date |
---|---|
DE50212149D1 (de) | 2008-06-05 |
EP1382404B1 (de) | 2008-04-23 |
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