EP0906800A1 - Verfahren und Vorrichtung zum Herstellen einer Hohlwelle mit äusseren radialen Erhebungen durch Innenhochdruck-Umformung - Google Patents
Verfahren und Vorrichtung zum Herstellen einer Hohlwelle mit äusseren radialen Erhebungen durch Innenhochdruck-Umformung Download PDFInfo
- Publication number
- EP0906800A1 EP0906800A1 EP98116383A EP98116383A EP0906800A1 EP 0906800 A1 EP0906800 A1 EP 0906800A1 EP 98116383 A EP98116383 A EP 98116383A EP 98116383 A EP98116383 A EP 98116383A EP 0906800 A1 EP0906800 A1 EP 0906800A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elevations
- tool
- semi
- finished product
- axial
- 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
Links
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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
-
- 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
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure
-
- 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
- B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
- B21D53/845—Making camshafts
Definitions
- the invention relates to a method and a device for producing a hollow shaft with outer radial elevations, in particular camshaft, from a preformed Semi-finished product after the hydroforming process.
- the pipe section After closing the ends of the pipe section through the forming plunger, the pipe section with the help of a suitable Pressurized medium with high internal pressure and at the same time pressurized with axial pressure (through the forming plunger) on the pipe wall reshaped.
- the axial pressure and the internal pressure cause the pipe section to the inner contour or wall having the final shape of the hollow body of the forming tool.
- hydroforming the material is made into displaced the plastic state that under during the entire forming process Consideration of material hardening and any tool forces is maintained.
- the invention has for its object a method and an apparatus to create the kind mentioned at the outset, with which the preformed Semi-finished products with targeted contour and shape of the mass accumulations achieve and thus elaborate post-processing, z.
- This object is achieved according to the invention in that for required during hydroforming with the tool closed Transport of material into the forming zone, the preformed elevations or Constriction beads of the semi-finished product are axially applied.
- the invention lies here the knowledge is based on the fact that in the internal high-pressure forming of this Semi-finished products due to their geometry difficult expansion situation with an over the circumferential expansion lying in the area of the mass accumulation, which requires special consideration of the material flow, then is coped with if the pressurization for feeding the material is not more as usual with the hydroforming process from the front of the Semi-finished product takes place, but directly over the already existing, pre-formed Elevations or constriction beads themselves. This is because one can gradual finish-forming by forming the surveys in groups and thus on a much smaller one in relation to the total length of the semi-finished product Allow section so that the longitudinal expansion can be significantly reduced.
- An embodiment of the method according to the invention provides that the open Ends of the semi-finished product inserted into the tool from both sides in the hollow shaft retracting closure means, at least one of which has a feed for the pressure medium is formed, sealed, the entire semi-finished product during the introduction of the print medium over to adjacent surveys facing each other axially engaging tool means and after the hydroforming of this section the Tool means are solved, then the semi-finished product to the finished product one further step, determined by the distance between the surveys, into the Tool fed in and after the respective closing of the tool means media is introduced again.
- the surveys can thus be Pressure build-up by pushing the axial blocks to their finished contour in steps Form individual production of the recorded group of surveys.
- the semi-finished product is simultaneously with the Feed rotated into the tool. This can be done, for example, by means of a step-by-step workpiece feed already available manipulator achieve, the turning especially when offset over the circumference Surveys are required, as in the case of camshaft manufacture.
- a device for performing the method provides that the tool a divided one, depicting the geometry of a group of elevations on the inside Block consists in which of two axially opposite axial blocks of the first axial block on the one hand with one of the basic geometry of the elevations corresponding recess completely includes a survey and on the other hand with its end face facing the second axial block from the outside to the creates the next survey and applies it during the second Axialblock is the outside elevation adjacent to the next elevation acted upon, one arranged between the two axial blocks, the Axial blocks slidably supporting center block the semi-finished product between the two charged surveys.
- the example in Dovetail guides carried by the center block in the parting plane also subdivided axial blocks correspondingly lifted and after the handling process be closed again.
- sealing lances engage in the open ends of the semi-finished product one, at least one of which is connected to a pressure medium source Has pressure medium supply. It is recommended that the sealing lances with one pressing a sealing ring against the inner wall of the semi-finished product Spreading mechanism are formed.
- the sealing lances positioned thus close or chamber the pressure medium introduced via the feed into its effective space and limit it essentially to the respective group the surveys or constrictions to be formed.
- the sealing ring with a tie rod engaging behind an anchor, the advantageously made of an elastic plastic material radially widen and press against the inner contour of the semi-finished product. With increasing The seal supports the internal pressure in the effective space of the pressure medium supplied also yourself.
- the internal high-pressure forming machine shown is from one shown in FIG Semi-finished product 1, which is distributed over its length on the outside with several radial Surveys 2 to 9 is provided; the semifinished product 1 according to the embodiment serves as a preliminary product for a camshaft to be manufactured.
- the semifinished product 1 is at least one free end 10 by means of a manipulator (not shown) into the - different from its functional position shown in FIG. 2 - completely opened tool 11, the one divided and the geometry of a group 2, 3 or 4, 5 or 6, 7 or 8.9 of the radial elevations 2 to 9 imaging block consists of a center block 12 and two opposite, in upper and lower Slideways 13 and 14 of the center block 12 arranged, i.e. of this supported axial blocks 15, 16.
- the horizontal parting plane of the - thus two-part - Blocks 12 and 15, 16 and the vertical parting planes of the center block 12 in Reference to the axial blocks 15, 16 guided in it is the partially open one 3 according to the tool.
- the center block 12 becomes more vertical Direction and the axial blocks 15 and 16 are acted upon in the axial direction.
- the Axial blocks 15, 16 lie with their inner end faces 17 and 18 on the Outside of the - in the embodiment of FIG. 2 - group of two of the two radial elevations 8, 9. So that during hydroforming the radial elevations 8, 9 - and in the step sequence of group-wise subsequent conveying the elevations 6, 7 or 4, 5 or 2, 3 - with a local characteristic to cam 19 (cf. FIG. 3), the end faces 17, 18 of the axial blocks 15, 16 corresponding cutouts 20, which can be seen in more detail in FIG.
- the gradual group forming first axial block 16 also has one of the Basic geometry of the elevations 2 to 9 corresponding recess 21 (see FIG. 3) in its two sub-blocks, with the first one being processed Group following survey 7 or 5 or in the penultimate step survey 3 completely includes; forming the last group, i.e. of the two neighboring ones Elevations 2, 3, the recess 21 remains free.
- the one during the forming process required transport of material in the forming zone is consequently via the charged surveys 8, 9 - or in the case of inner beads, not shown Semi-finished products about this - achieved by yourself.
- Sealing lances 22 serve to seal the semifinished product 1 during the forming or 23, the retracted from the two open sides of the semi-finished product 1 and with a sealing head 24 shown in Fig. 4 to the inner contour or wall of the Semi-finished product 1 are pressed.
- This can - as for example according to FIG. 4 - by means of a cantilever projecting out of an anchor piece 25
- plastic sealing ring 27 is radially widened (see the arrows in Fig. 4).
- To introduce the pressure medium into the cam 19 to form it serving effective space according to FIG. 3 is at least one sealing lance 23 with a Pressure medium supply 28 formed, which is connected to a pressure medium source 29 is.
- the mode of operation for the hydroforming of elevations 2 to 9 - or any other number of elevations or inner beads, depending on desired finished product - through group-specific production to cam 19 one Camshaft is accordingly such that when the tool 11 is completely open, by means of the Handling manipulator, the semi-finished product 1 axially fed and thus the first Group of the elevations to be formed is fed into the tool 11. Then the center block 12 is closed, using the example of FIGS. 2 and 3 (see Fig. 3) and then the two two-part axial blocks 15, 16 to the plant the center block 12 (see FIG. 2) moved together, due to the Shape or the cutouts 20 locally shape the cams 19; the finished Cams 19 can be seen on the right in FIG. 3.
- the Lances 23 from the effective space of the introduced pressure medium.
- the blocks 12 and 14, 15 of the tool 11 move in reverse Sequence apart, whereupon the camshaft or the semifinished product 1 transported and unhindered by the manipulator at the same time can be rotated so that the tool 11 or its blocks 12 and 14, 15 in can form another cam group in the same position and in the same cycle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Forging (AREA)
Abstract
Description
- Fig. 1
- die Gesamtansicht eines Halbzeugs zur Herstellung einer Nockenwelle durch Innenhochdruck-Umformung;
- Fig. 2
- als Einzelheit einer Innenhochdruck-Umformmaschine das im Schnitt dargestellte, geschlossene Werkzeug zur schrittweisen Umformung einzelner Nockengruppen;
- Fig. 3
- das Werkzeug gemäß Fig. 2 in teilgeöffnetem Zustand und nach dem Vorschub der nächstfolgenden Nockengruppe des Halbzeugs; und
- Fig. 4
- als Einzelheit der in die Hohlwelle des Halbzeugs von beiden Seiten eingreifenden Dichtungslanzen deren einen Dichtring aufweisenden Lanzenkopf, schematisch dargestellt.
Claims (7)
- Verfahren zum Herstellen von Werkstücken nach dem Innenhochdruck-Umformverfahren aus einem vorgeformten, hohlwellenartigen Halbzeug, das äußere radiale Erhebungen oder in das Hohlwelleninnere wulstartig vorkragende Einschnürungen aufweist,
dadurch gekennzeichnet,
daß zum während der Innenhochdruck-Umformung bei geschlossenem Werkzeug erforderlichen Transport von Werkstoff in die Umformzone die vorgeformten Erhebungen bzw. Einschnürungswulste des Halbzeugs axial beaufschlagt werden. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die offenen Enden des in das Werkzeug eingelegten Halbzeugs von beidseitig in die Hohlwelle einfahrenden Verschlußmitteln, von denen mindestens eines mit einer Zuführung für das Druckmedium ausgebildet ist, abgedichtet werden, das gesamte Halbzeug während des Einleitens des Druckmediums über an benachbarte Erhebungen einander zugewandt jeweils von außen angreifende Werkzeugmittel axial nachgeschoben wird und nach dem Innenhochdruckumformen dieses Teilabschnitts die Werkzeugmittel gelöst werden, danach das Halbzeug bis zum Fertigprodukt um jeweils einen weiteren, vom Abstand der Erhebungen bestimmten Schritt in das Werkzeug eingefördert sowie nach dem jeweiligen Schließen der Werkzeugmittel erneut Druckmedium eingeleitet wird. - Verfahren nach Anspruch 1 oder 2, insbesondere zum Herstellen einer Nockenwelle aus einem äußere radiale Erhebungen aufweisenden Halbzeug,
dadurch gekennzeichnet,
daß das Halbzeug gleichzeitig mit dem Einfördern in das Werkzeug gedreht wird. - Vorrichtung zum Herstellen von Werkstücken nach dem Innenhochdruck-Umformverfahren aus einem vorgeformten, hohlwellenartigen Halbzeug, insbesondere zum Durchführen des Verfahrens nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß das Werkzeug (11) aus einem geteilten, innen die Geometrie einer Gruppe (2, 3 bzw. 4,5 bzw. 6, 7 bzw. 8, 9) der Erhebungen (2 bis 9) abbildenden Block (12, 14, 15) besteht, bei dem von zwei einander gegenüberliegenden Axialblöcken (15, 16) der erste Axialblock (16) einerseits mit einer der Grundgeometrie der Erhebungen (2 bis 9) entsprechenden Ausnehmung (21) eine Erhebung (7 bzw. 5 bzw. 3) völlig einschließt und sich andererseits mit seiner dem zweiten Axialblock (15) zugewandten Stirnfläche (18) von außen an die nächstfolgende Erhebung (8) anlegt und diese beaufschlagt, während der zweite Axialblock (15) die zu der nächstfolgenden Erhebung (8) benachbarte Erhebung (9) von außen beaufschlagt, wobei ein zwischen den beiden Axialblöcken (15, 16) angeordneter, die Axialblöcke (15, 16) gleitbeweglich tragender Mittenblock (12) das Halbzeug (1) zwischen den beiden beaufschlagten Erhebungen (8, 9 bzw. 6, 7 bzw. 4, 5 bzw. 2, 3) einschließt. - Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß die den beaufschlagten Erhebungen (8, 9 bzw. 6, 7 bzw. 4, 5 bzw. 2, 3) zugewandten Stirnflächen (17, 18) der Axialblöcke (15, 16) zur Ausbildung von Nocken (19) einer Nockenwelle mit einem die örtliche Umformung der Erhebungen (2 bis 9) begrenzenden Stirnflächen-Ausschnitt (20) ausgebildet sind. - Vorrichtung nach Anspruch 4 oder 5,
gekennzeichnet durch
in die offenen Enden des Halbzeuges (1) eingreifende Dichtlanzen (22, 23), von denen zumindest eine (23) eine an eine Druckmittelquelle (29) angeschlossene Druckmittelzuführung (28) aufweist. - Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß die Dichtlanzen (22, 23) mit einem einen Dichtring (27) gegen die Rohrinnenwandung des Halbzeugs andrückenden Spreizmechanismus (25, 26) ausgebildet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19743863 | 1997-10-04 | ||
DE19743863A DE19743863A1 (de) | 1997-10-04 | 1997-10-04 | Verfahren und Vorrichtung zum Herstellen einer Hohlwelle mit äußeren radialen Erhebungen durch Innenhochdruck-Umformung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0906800A1 true EP0906800A1 (de) | 1999-04-07 |
EP0906800B1 EP0906800B1 (de) | 2002-04-03 |
Family
ID=7844576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98116383A Expired - Lifetime EP0906800B1 (de) | 1997-10-04 | 1998-08-29 | Verfahren und Vorrichtung zum Herstellen einer Hohlwelle mit äusseren radialen Erhebungen durch Innenhochdruck-Umformung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0906800B1 (de) |
AT (1) | ATE215412T1 (de) |
DE (2) | DE19743863A1 (de) |
ES (1) | ES2175576T3 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1657007A1 (de) * | 2004-11-10 | 2006-05-17 | Joachim Hermann Schondelmaier | Verfahren und Vorrichtung zum Verformen von Werkstücken |
EP1801250A1 (de) * | 2005-12-22 | 2007-06-27 | VIEGA GmbH & Co. KG. | Migrationsarme Bauteile aus Kupferlegierung für Medien oder Trinkwasser führender Gewerke |
EP1900451A1 (de) * | 2006-09-13 | 2008-03-19 | Kubota Iron Works Co., Ltd. | Verfahren und Vorrichtung zur Formung einer hohlen, stufenprofilierten Welle |
WO2012065739A1 (de) * | 2010-11-19 | 2012-05-24 | Thyssenkrupp Presta Teccenter Ag | Verfahren und vorrichtung zur herstellung eines hohlen bauteils und ein hohles bauteil |
EP2745951A1 (de) * | 2012-12-20 | 2014-06-25 | C.R.F. Società Consortile per Azioni | Verfahren zur Herstellung einer Nockenwelle in einem Verbrennungsmotor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004030545B3 (de) * | 2004-06-24 | 2006-01-05 | Sebring Technology Gmbh | Verfahren und Vorrichtung zum Innenhochdruckformen eines Hohlprofils |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015354A (en) * | 1956-12-11 | 1962-01-02 | Standard Thomson Corp | Flexible tube forming machine |
US3704983A (en) * | 1970-12-04 | 1972-12-05 | Establissements Butin Gillet | Method of and apparatus for the formation of tubular articles |
JPS5976634A (ja) * | 1982-10-26 | 1984-05-01 | Toshiba Corp | クランクシヤフトの製法 |
JPS59120326A (ja) * | 1982-12-28 | 1984-07-11 | Toshiba Corp | 圧縮機等のクランクシヤフト成形方法 |
JPH0275421A (ja) * | 1988-09-09 | 1990-03-15 | Masanobu Nakamura | 突起付きパイプの製造方法 |
DE4427201A1 (de) * | 1993-11-26 | 1995-06-01 | Schneider Gesenkschmiede | Hohle Nockenwelle und Verfahren zu ihrer Herstellung |
DE19622372A1 (de) * | 1996-06-04 | 1997-12-11 | Meleghy Gmbh & Co Kg | Verfahren und Vorrichtung zum Herstellen von Nockenwellen |
-
1997
- 1997-10-04 DE DE19743863A patent/DE19743863A1/de not_active Withdrawn
-
1998
- 1998-08-29 AT AT98116383T patent/ATE215412T1/de not_active IP Right Cessation
- 1998-08-29 ES ES98116383T patent/ES2175576T3/es not_active Expired - Lifetime
- 1998-08-29 DE DE59803596T patent/DE59803596D1/de not_active Expired - Fee Related
- 1998-08-29 EP EP98116383A patent/EP0906800B1/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015354A (en) * | 1956-12-11 | 1962-01-02 | Standard Thomson Corp | Flexible tube forming machine |
US3704983A (en) * | 1970-12-04 | 1972-12-05 | Establissements Butin Gillet | Method of and apparatus for the formation of tubular articles |
JPS5976634A (ja) * | 1982-10-26 | 1984-05-01 | Toshiba Corp | クランクシヤフトの製法 |
JPS59120326A (ja) * | 1982-12-28 | 1984-07-11 | Toshiba Corp | 圧縮機等のクランクシヤフト成形方法 |
JPH0275421A (ja) * | 1988-09-09 | 1990-03-15 | Masanobu Nakamura | 突起付きパイプの製造方法 |
DE4427201A1 (de) * | 1993-11-26 | 1995-06-01 | Schneider Gesenkschmiede | Hohle Nockenwelle und Verfahren zu ihrer Herstellung |
DE19622372A1 (de) * | 1996-06-04 | 1997-12-11 | Meleghy Gmbh & Co Kg | Verfahren und Vorrichtung zum Herstellen von Nockenwellen |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 008, no. 186 (M - 320) 25 August 1984 (1984-08-25) * |
PATENT ABSTRACTS OF JAPAN vol. 008, no. 240 (M - 336) 6 November 1984 (1984-11-06) * |
PATENT ABSTRACTS OF JAPAN vol. 014, no. 262 (M - 0981) 6 June 1990 (1990-06-06) * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1657007A1 (de) * | 2004-11-10 | 2006-05-17 | Joachim Hermann Schondelmaier | Verfahren und Vorrichtung zum Verformen von Werkstücken |
EP1801250A1 (de) * | 2005-12-22 | 2007-06-27 | VIEGA GmbH & Co. KG. | Migrationsarme Bauteile aus Kupferlegierung für Medien oder Trinkwasser führender Gewerke |
EP1900451A1 (de) * | 2006-09-13 | 2008-03-19 | Kubota Iron Works Co., Ltd. | Verfahren und Vorrichtung zur Formung einer hohlen, stufenprofilierten Welle |
WO2012065739A1 (de) * | 2010-11-19 | 2012-05-24 | Thyssenkrupp Presta Teccenter Ag | Verfahren und vorrichtung zur herstellung eines hohlen bauteils und ein hohles bauteil |
EP2745951A1 (de) * | 2012-12-20 | 2014-06-25 | C.R.F. Società Consortile per Azioni | Verfahren zur Herstellung einer Nockenwelle in einem Verbrennungsmotor |
WO2014096988A1 (en) | 2012-12-20 | 2014-06-26 | C.R.F. Società Consortile Per Azioni | Method for producing a camshaft for an internal-combustion engine |
US10124397B2 (en) | 2012-12-20 | 2018-11-13 | C.R.F. Societa Consortile Per Azioni | Method for producing a camshaft for an internal-combustion engine |
Also Published As
Publication number | Publication date |
---|---|
ES2175576T3 (es) | 2002-11-16 |
EP0906800B1 (de) | 2002-04-03 |
ATE215412T1 (de) | 2002-04-15 |
DE59803596D1 (de) | 2002-05-08 |
DE19743863A1 (de) | 1999-04-15 |
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