EP2049276A1 - Dispositif et procédé de formage d'une pièce - Google Patents
Dispositif et procédé de formage d'une pièceInfo
- Publication number
- EP2049276A1 EP2049276A1 EP07786006A EP07786006A EP2049276A1 EP 2049276 A1 EP2049276 A1 EP 2049276A1 EP 07786006 A EP07786006 A EP 07786006A EP 07786006 A EP07786006 A EP 07786006A EP 2049276 A1 EP2049276 A1 EP 2049276A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- forming
- workpiece
- stroke
- forming tool
- feed
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000739 chaotic effect Effects 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 4
- 238000000641 cold extrusion Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/004—Extruding metal; Impact extrusion using vibratory energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/18—Making uncoated products by impact extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
Definitions
- the invention relates to a device for forming, in particular for cold forming, in particular for cold extrusion, a workpiece having a forming tool and a feed device, by which a relative movement between the workpiece and the forming tool can be generated, wherein the device interacts with the feed device Frequency generating means, by which the relative movement between the workpiece and forming tool generated by the feed device is modulated such that after a forward stroke at which the workpiece and / or the forming tool in the feed direction passes through a first stroke, in a subsequent backward stroke movement of the forming tool and / or the workpiece in a direction opposite to the feed direction by a second stroke is feasible, and a method for forming a workpiece, in which by a feed device, a relative movement zwisc hen the workpiece and a forming tool is produced, wherein the relative movement between the workpiece and the forming tool generated by the feed device is modulated in such a way that after a forward stroke in which the workpiece and / or the
- Such a device and such a method are known from EP 1 003 616 B1 of the Applicant. Such devices and methods are used, for example, for splining shaft-like parts. In the case of massive shafts, external splines can be produced by the known device and the known method, and both external and internal splines in tubular shafts.
- the device described in the aforementioned publication and the corresponding method have the advantage that by the frequency-modulated feed, a reduction of the pressing force by up to about 50% compared to a conventional axial forming or extruding can be achieved.
- the known device and the method described above have the further disadvantage that the forming tool usually has only an insufficient service life. This is due to the fact that in the known th device and in the known method during the entire forming process, ie in each individual forming step, a constant forward stroke and a constant backward stroke are traversed, that is, that the stroke paths in the forward direction and those in the reverse direction are always the same size. This has the consequence that always the same areas of the forming tool come into operative engagement with the workpiece to be machined.
- the frequency generating device modulates the feed device such that the strokes of the forward strokes and / or the scrubindexhübe at least two successive, each consisting of a forward stroke and a return stroke forming steps of the device are different.
- the inventive method provides that the feed device is modulated by the frequency generating device such that the strokes of the forward strokes and / or the backward strokes of at least two successive, each consisting of a forward stroke and a return stroke forming steps are different.
- the measures according to the invention cause, on the one hand, that an increase in the service life of the forming tool can be achieved:
- the different stroke paths of the individual successive forming steps cause the force acting on the forming zones of the forming tool to be different in each forming step than in the previous forming step.
- This has the consequence that corresponding tool parts are not - as in the known devices and methods - continuously stressed, but that in an advantageous manner, the corresponding load cases (pressure, tensile and bending load and abrasive load) to different areas of the forming tool.
- an increased service life is achieved in an advantageous manner.
- An advantageous further development of the invention provides that the forming steps carried out within a specific forming length to be traversed by the forming tool during the forming of the workpiece have a non-continuous, chaotic distribution of the stroke paths of the individual forming steps.
- Such a measure has the advantage that in this way the service life of the forming tool is significantly increased, since the force acting on forming zones of the forming tool at each forming step is slightly different than the previous forming step, so that the occurring during the deformation of the workpiece load cases of the forming tool also distribute chaotically, with the result that not always the same deformation zones, but different deformation zones of the forming tool are applied.
- a further advantageous development of the invention provides that the frequency generating device modulates the feed device in such a way that the forming path extending from the forming tool during machining of a workpiece in its axial direction is divided into at least two forming zones with different stroke paths of the forward stroke and / or the reverse stroke of the individual forming steps ,
- Such a measure makes it possible in an advantageous manner that the individual forming steps can be adapted to the specific forming conditions occurring in a specific forming zone, that is to say that the stroke paths of a specific sequence of forming steps are determined in such a way that in a certain forming zone the best possible machining result is achieved.
- Figure 1 a first embodiment of a device
- Figure 2 a second embodiment of a device.
- the illustrated in Figure 1 first embodiment of a device 1 for forming, in particular for cold forming, in particular for cold extrusion, a workpiece 2, a forming tool 3, which is formed in the case shown here as a deformation die.
- the forming tool 3 is movable relative to the workpiece 2 by a feed device 5.
- this generates a relative movement between the forming tool 3 and the workpiece 2 clamped in a clamping unit 7. If the forming tool 3 is moved by the feed device 5 in its feed direction P against the workpiece 2 clamped in a fixed manner in the case shown here, the workpiece 2 enters the workpiece Forming tool 3 and is formed in a conventional manner.
- the movement in the feed direction P is modified by a frequency generating device 10 acting on the feed device 5 such that the forming tool 3 executes a stroke-like movement in the feed direction P, in which it is provided that after a forward stroke, in which the forming tool 3 is moved forward by a first stroke, the forming tool 3 is retracted in a subsequent backward stroke by the feed device 5 by a second stroke. In a further first stroke of the forming step following the forming step described above, the forming tool 3 is moved forward again, beyond the end point of the forward stroke of the previous forming step.
- the stroke of the forward strokes and / or the backward strokes of the individual forming steps has a non-continuous, chaotic distribution. It is preferred here that the frequency generation device 10 has a so-called fuzzy logic 11 for determining the respective forward strokes and / or backward strokes of the individual forming steps.
- This procedure has the advantage that in this way the service life of the forming tool 3 is significantly increased since the force acting on forming zones of the forming tool 3 is slightly different at each forming step than in the preceding forming step:
- the load cases of the forming tool 3 (FIG. especially compressive, tensile and bending loads as well as an abrasive load) are due to the non-continuous, chaotic sequence of strokes of the individual forward strokes and / or backward Strokes of the individual forming steps also chaotically distributed, whereby the burden of the individual forming zones of the forming tool 3 distributed chaotically.
- the fuzzy logic 11 of the frequency generator 10 program the forward strokes and / or the backward strokes of the individual forming steps such that substantially no equal stroke paths result over an axially extending forming length of the workpiece 2. This procedure has the advantage that a distribution of the loading forces on the forming tool 3 is thereby achieved.
- the procedure described above is also suitable for being used for removing the workpiece 2 from the forming tool 3.
- the procedure to be performed results for the skilled person simply by taking the return direction of the forming tool 3 as "forward direction" in the sense of the above description.
- the frequency modulation of the feed device 5 is carried out in such a way that the forming path extending from the forming tool 3 during machining of the workpiece 2 in its axial direction is divided into at least two forming zones and within these individual Umformzonen the stroke of the forward strokes and / or the scrubmeasured to the respective forming zone forming steps is determined such that an improved deformation behavior of the forming tool 3 is achieved:
- the frequency modulation of the feed device 5 is carried out by the frequency generating device 10 such that the desired for a transformation in and of itself A good material flow is deliberately prevented or at least reduced. This causes a better filling of the top circle both in an external and an internal toothing.
- the immersion of the diameter of the workpiece 2 to be
- a non-continuous, chaotic modulation of the forming tool 3 is then preferably again carried out in a subsequent second forming zone as described above.
- this approach is not limited to two forming zones. In principle, it is possible to provide any number of different forming zones, in order to adapt the length of the forward strokes and / or the backward strokes of the forming steps correlated with a specific forming zone to the processing requirements and / or the machining results to be achieved.
- the frequency generating device 10 modulates the feed direction 5 in such a way that the forming tool 3 only has a very short stroke in the corresponding forming steps in the forward direction and an even smaller stroke in the reverse direction, so that a pushing out of the material material over the end region of the toothing is avoided or at least reduced.
- FIG. 2 of a device V is substantially the same as the device 1 of the first embodiment, so that the same parts can be provided with the same reference numerals and need not be described in more detail.
- An essential difference between the two embodiments is that in the device 1, the forming tool 3 is arranged stationary, while the workpiece 2 is axially displaceable to the forming tool 3.
- the feed device 5 and the frequency generating device 10 cooperating with it act on the workpiece 2 or on the clamping unit 7 exciting the workpiece 2.
- a combination between the two vorgenanten embodiments is possible, that is, both the forming tool 3 and the workpiece 2 are moved by the feed device 5 for generating a corresponding relative movement between the workpiece 2 and forming tool 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Adornments (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200620012170 DE202006012170U1 (de) | 2006-08-07 | 2006-08-07 | Vorrichtung zum Umformen, insbesondere zum Kaltverformen, von Werkstücken |
DE200610037091 DE102006037091B3 (de) | 2006-08-07 | 2006-08-07 | Vorrichtung und Verfahren zum Umformen eines Werkstücks |
PCT/EP2007/006174 WO2008017358A1 (fr) | 2006-08-07 | 2007-07-12 | Dispositif et procédé de formage d'une pièce |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2049276A1 true EP2049276A1 (fr) | 2009-04-22 |
EP2049276B1 EP2049276B1 (fr) | 2010-01-06 |
Family
ID=38515755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07786006A Active EP2049276B1 (fr) | 2006-08-07 | 2007-07-12 | Dispositif et procédé de formage d'une pièce |
Country Status (7)
Country | Link |
---|---|
US (1) | US8091400B2 (fr) |
EP (1) | EP2049276B1 (fr) |
JP (1) | JP5517617B2 (fr) |
KR (1) | KR101417157B1 (fr) |
AT (1) | ATE454228T1 (fr) |
DE (1) | DE502007002574D1 (fr) |
WO (1) | WO2008017358A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120096915A1 (en) * | 2010-10-25 | 2012-04-26 | General Electric Company | System and method for near net shape forging |
CN102139291B (zh) * | 2011-03-28 | 2013-03-27 | 中国重型机械研究院有限公司 | 反向挤压机用的挤压筒与挤压堵头的同步控制系统 |
EP3181249B1 (fr) * | 2015-12-15 | 2018-02-07 | FELSS Systems GmbH | Procédé et dispositif destinés à déformer une pièce à usiner par extrusion |
EP3360622B1 (fr) * | 2017-02-13 | 2020-11-04 | FELSS Systems GmbH | Procédé de fabrication et machine de formage pour la formation des pièces en particulier métalliques par extrusion |
CN111804918B (zh) * | 2020-07-21 | 2022-04-12 | 西华大学 | 一种粉末冶金零件及其制备方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT271143B (de) * | 1967-10-09 | 1969-05-27 | Langestein & Schemann Ag | Maschine zur Unformung eines Werkstückes zwischen zwei Bären |
US3550417A (en) * | 1968-03-14 | 1970-12-29 | Univ Ohio | Process for the cold forming of metal |
US3585832A (en) * | 1968-06-14 | 1971-06-22 | Battelle Development Corp | Metal working |
US3572080A (en) * | 1968-10-03 | 1971-03-23 | George A Mitchell Co | Production of pointed workpieces |
US3818799A (en) * | 1972-10-30 | 1974-06-25 | Chambersburg Eng Co | Control system for an impact device |
US4197757A (en) * | 1977-04-13 | 1980-04-15 | Hackett Kenneth P | Method and apparatus for the cold forming of metal |
US4131164A (en) * | 1977-11-23 | 1978-12-26 | Chambersburg Engineering Company | Adaptive valve control system for an impact device |
JPS632512U (fr) * | 1986-06-24 | 1988-01-09 | ||
JPH02251330A (ja) * | 1989-02-14 | 1990-10-09 | Brother Ind Ltd | 鍛造方法 |
JPH0839427A (ja) * | 1994-07-22 | 1996-02-13 | Toyoda Mach Works Ltd | 研削装置 |
DE19735486C2 (de) * | 1997-08-16 | 2000-07-20 | Felss Geb | Vorrichtung und Verfahren zum Kaltverformen von Werkstücken |
DE10027703B4 (de) * | 2000-06-03 | 2005-03-03 | Sms Demag Ag | Verfahren und Vorrichtung zum Umformen, insbesondere Fließpressen eines metallischen Werkstücks |
DE102004042917A1 (de) | 2004-09-02 | 2006-03-23 | Felss Gmbh | Verfahren und Vorrichtung zur Korrektur eines Schrägenfehlers eines polygonalen Profils, insbesondere eines Flankenrichtungsfehlers einer Verzahnung |
-
2007
- 2007-07-12 JP JP2009523164A patent/JP5517617B2/ja active Active
- 2007-07-12 KR KR1020097002820A patent/KR101417157B1/ko active IP Right Grant
- 2007-07-12 WO PCT/EP2007/006174 patent/WO2008017358A1/fr active Application Filing
- 2007-07-12 AT AT07786006T patent/ATE454228T1/de active
- 2007-07-12 DE DE502007002574T patent/DE502007002574D1/de active Active
- 2007-07-12 EP EP07786006A patent/EP2049276B1/fr active Active
- 2007-07-12 US US12/309,949 patent/US8091400B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008017358A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE454228T1 (de) | 2010-01-15 |
DE502007002574D1 (de) | 2010-02-25 |
JP5517617B2 (ja) | 2014-06-11 |
US8091400B2 (en) | 2012-01-10 |
KR20090036588A (ko) | 2009-04-14 |
US20090188292A1 (en) | 2009-07-30 |
WO2008017358A1 (fr) | 2008-02-14 |
JP2010500175A (ja) | 2010-01-07 |
EP2049276B1 (fr) | 2010-01-06 |
KR101417157B1 (ko) | 2014-07-08 |
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