WO2001015827A1 - Dispositif et procede permettant de menager un evidement dans une piece a usiner - Google Patents

Dispositif et procede permettant de menager un evidement dans une piece a usiner Download PDF

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Publication number
WO2001015827A1
WO2001015827A1 PCT/EP2000/008208 EP0008208W WO0115827A1 WO 2001015827 A1 WO2001015827 A1 WO 2001015827A1 EP 0008208 W EP0008208 W EP 0008208W WO 0115827 A1 WO0115827 A1 WO 0115827A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
machining
feed
workpiece
force
Prior art date
Application number
PCT/EP2000/008208
Other languages
German (de)
English (en)
Inventor
Eckard Morlock
Philipp Grupp
Original Assignee
Felss Gmbh
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 Felss Gmbh filed Critical Felss Gmbh
Priority to AT00954644T priority Critical patent/ATE250474T1/de
Priority to KR1020027002441A priority patent/KR20020053056A/ko
Priority to JP2001520228A priority patent/JP2003508225A/ja
Priority to HU0203327A priority patent/HUP0203327A2/hu
Priority to DE50003853T priority patent/DE50003853D1/de
Priority to CA002381844A priority patent/CA2381844A1/fr
Priority to EP00954644A priority patent/EP1212155B1/fr
Publication of WO2001015827A1 publication Critical patent/WO2001015827A1/fr

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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing

Definitions

  • the invention relates to a device for introducing a depression into a workpiece, which has a tool that can be moved in a feed direction by a feed device, the at least one machining element of which acts on the workpiece to produce the depression, and a corresponding method.
  • dome set delivers at least satisfactory results for a large number of applications. However, this can - particularly in the case of thin-walled tubular workpieces - lead to tearing and thus damage to the tube, which is caused by the action of the forming tools acting on the outer surface of the tubular workpiece.
  • a device for introducing a depression into a workpiece which has a tool that can be moved in a feed direction by a feed device, the at least one processing element of which acts on the workpiece to produce the depression.
  • the machining element has an oval central opening, from which two diametrically opposed U-shaped recesses extend in the feed direction, these two U-shaped recesses being delimited by a wedge-shaped cutting edge.
  • the workpiece is inserted into the central opening of the machining tool and then the machining tool is advanced in the feed direction.
  • the device has at least one processing element with a processing area which is wedge-shaped in the direction of advance of the tool and widens from a front end to the opposite end of the processing area to a width which essentially Chen corresponds to the axial extent of the recess to be produced, and rises from the base of the tool to a height which is at least the depth of the recess to be produced, and that the device has a device by which the tool in a different direction from the feed direction can be loaded with a varying machining force.
  • the tool used has at least one machining element with a machining region which is wedge-shaped in the direction of advance of the tool and widens from a front end to an opposite end of the machining region to a width which essentially corresponds to the axial extent of the recess to be produced and rising from the base of the tool to a height which is at least the depth of the recess to be produced, and that the tool in a different machining from the feed direction direction is subjected to a varying machining force.
  • FIG. 1 shows a schematic illustration of the first exemplary embodiment
  • FIG. 2 shows a sectional view of the first exemplary embodiment along the line B-B of FIG. 1,
  • Figure 3 is a sectional view of the first embodiment along line A-A of Figure 1, and
  • Figure 4 shows three embodiments of the tool.
  • FIGS. 1 to 3 show a schematically illustrated device, generally designated 1, for introducing depressions 2a-2d (see FIG. 4) into a workpiece 3a-3e.
  • the device 1 has a clamping device 10, into which the workpieces 3a-3e can be clamped and thereby held in a fixed position in the clamping device 10.
  • the tensioning device 0 can be moved by a feed device 11 in the directions of the double arrow X, so that the loading and unloading of the tensioning device 10 can be moved out of its working position shown in FIG. 1 and after the loading process can be moved back into the working position.
  • the feed device 11 of the tensioning device 10 is preferably designed to operate hydraulically or pneumatically or in a motorized manner, a piston 12 of the feed device 11 acting on the tensioning device 10.
  • a pressurized working medium into a piston chamber 13
  • the tensioning device 10 is opposite a pressing device 20, which is likewise movable in the direction of the double arrow X 'by a feed device 21 - as will be described further below.
  • a piston 22 of the feed device 21 engages the pressure device 20, the piston 22 in turn being able to be moved back and forth by feeding a working medium into a piston chamber 23 of the feed device 21.
  • a tool 30 can be inserted between the clamping device 10 and the pressing device 20 by a feed device 31, which in turn has a piston 32 guided in a piston chamber 33.
  • the tool 30 guided in a guide 25 of the pressing device 20 has - as can best be seen from FIG. 3 - a number of processing elements 35a-35d, the number of processing elements 35a-35d being matched to the number of depressions 2a-2d, which is to be formed in each of the workpieces 3a-3e.
  • each machining element 35a-35d is wedge-shaped, a wedge-shaped front part 37 of the machining elements 35a-35d widening from a sharp tip 38 to the end 39 of the machining region 40, whereby the width b of the wedge-shaped machining area 40 at its end 39 is substantially equal to the axial extent I of the corresponding recess 2a-2d.
  • the wedge-shaped machining area 40 of the machining elements 35a-35d rises from the tip 38 lying in the base 36 of the tool 30 to a height h which essentially corresponds to the depth t of each recess 2a-2d.
  • the clamping device 10 is first removed from the one assigned to it Feed device 11 is moved away from its working position shown in FIG. 1, so that workpieces 3a-3e can be inserted into corresponding receptacles 10a-10e of clamping device 10. Then the clamping device 10 is moved back into its working position. The feed device 31 assigned to the tool 30 then moves the tool 30 along the guide 25 of the pressing device 20 into the space between the clamping device 10 and the pressing device 20. At the latest when the front end, preferably a tip 38, of the first machining element 35a of the tool
  • the tool 30 is placed on the foremost workpiece 3a in the feed direction, the tool 30 is acted upon by an oscillating machining force acting in a machining direction B, in that the pressing device 20 is correspondingly moved back and forth by its associated feed device 21.
  • This application of force is preferably carried out in such a way that the machining force acting essentially orthogonally on the tool 30, preferably periodically oscillating, varies between a maximum value and a minimum value, the minimum value being able to be in the region of zero, or even assuming a negative value, i , that is, the pressing device 20 at this time moves the tool 30 away from the workpieces 3a-3e in a backward stroke.
  • the tool 30 Simultaneously with this hammer-like application of force to the tool 30 by the pressing device 20 from the machining direction B which is essentially orthogonal to the feed direction 21, the tool 30 is moved forward, quasi-continuously or in discrete steps by the feed device 31, it being further possible that this feed movement also takes place in an oscillating manner, the feed force causing this feed movement also being able to assume a negative value in its minimum, d. that is, the feed device
  • the tool 30 is moved back in a reverse stroke at this point in time before it is advanced again in a subsequent forward stroke.
  • the superimposition of the continuous, intermittent or oscillating feed movement of the tool 30 and that essentially orthogonal to the Advancing movement, hammer-like force application of the tool 30 in connection with the wedge shape of the machining elements 35a-35d described above advantageously has the effect that the recesses 2a-2d are introduced into the workpieces 3a-3e with only a minimal and, moreover, only locally machining force acting in the area of the depressions 2a-2d and thus can be carried out with only an extremely low material load.
  • the individual machining elements 35a-35e of the tool 30 are arranged offset in the feed direction.
  • This measure has the advantage that the production of individual depressions 2a-2d in a workpiece 3a-3e takes place at different times, as a result of which the feed force to be applied by the feed device 31 is reduced in an advantageous manner.
  • the tip 38 of the first machining element 35a of the tool 30 first acts on the workpiece 3a.
  • a further feed movement of the tool 30 entails that the front region 37 of the first machining element 35a following the tip 38 acts on the wall 3a 'of the tubular workpiece 3a, whereby the first recess in the workpiece 3a is successively produced.
  • the tip 38 of the second machining element 35b acts on the wall of the first workpiece 3a, as a result of which the second depression 2b is successively carried out in the workpiece 3a.
  • the processing elements 35c, 35d produce the third and fourth indentations 2c, 2d in the first workpiece 3a, and - as already mentioned above - in the feed movement of the tool 30 through its feed device 31, one takes place through the pressure device 20 .
  • Hammer-like force application of the tool 30 and thus its machining elements 35a-35d takes place
  • the first machining element 35a After the first machining element 35a has passed through the first workpiece 3a, its tip 38 appears on the second workpiece 3b. With a further advancing movement, the first recess of the second workpiece 3b is produced by the first machining element 35a further machining elements 35b-35d of the tool 30, the second to fourth recess of the second workpiece 3b. In a corresponding manner, the corresponding recesses of the workpiece 3c-3e are then produced by a further feed movement of the tool 30
  • the arrangement of the machining elements 35a-35d offset in the direction of advance hereby means that their rear region 41, which adjoins the actual machining region 40 and extends from the end 39 of the machining region 40 to the end 35a'-35d 'of the machining element 35a-35d, is designed in this way, that this does not hinder the feed movement of the tool 30 when the machining region 40 of the machining elements 35a-35d has already passed through the recess 2a-2d in the workpiece 3a-3e, ie the rear region 41 of each machining region 40 is designed in such a way that it can be pushed through the depression which was produced by the processing region 40 of the processing element 35a-35d
  • the oscillating force acting on the tool 30 in the machining direction B is generated by a corresponding movement of the feed device 21 of the pressing device 20.
  • the clamping device 10 it is also possible for the clamping device 10 to be supplementary to the feed device 11 oscillating movement of the pressing device 20 or instead of this is moved in a corresponding manner, so that the hammer-like machining force acting on the tool 30 is introduced in whole or in part by the clamping device 20 Applying force to the tool 30 only by moving the clamping device 10, the feed device 21 of the pressing device 20 can generally be dispensed with
  • FIG. 4 shows an essentially rectangular recess 2b, the machining area 40 being shaped as shown in FIG.
  • FIG. 4 shows an essentially sawtooth-shaped recess 2a, such as is used, for example, as a locking element in headrests for motor vehicles.
  • a locking bevel 2a 'running in the axial direction of the workpiece 3 is essentially orthogonal to the longitudinal direction of the Workpieces 3 extending latching surface 2a "above.
  • the machining area 40 of the machining element 35 is designed such that the machining area 40 has the shape of a right-angled triangle in plan view and in side view
  • the wedge-shaped processing area 40 is on Its surface has recesses 43, which are preferably arranged alternately. This measure has the effect that there is no effect on the machined workpiece 3 in the region of the recesses 43, which has the effect that the application of force and thus the action the machining element 35 is raised on the side opposite the recess 43
  • the machining elements 35a-35d act essentially orthogonally on the workpiece 3a-3e.
  • the machining elements 35a-35d it is also possible for the machining elements 35a-35d to be arranged in this way on the base surface of the workpiece 3a-3e that they act on these work suckers 3a-3e at a defined angle to the orthogonal. As a result, it is then possible for cutter cuts to be produced in the depressions 2a-2d
  • the device described is particularly suitable for producing a toothing in a tubular workpiece, in particular a thin-walled workpiece.
  • the arrangement of a corresponding number of machining elements 35a-35d in the tool 30 makes it particularly easy to do so by appropriately spacing these machining elements 35a-35d.
  • the device 1 has a feed device (not shown) through which the workpiece (s) 3a-3e can be pushed in its axial direction after the machining process has been ended by the tool 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Forging (AREA)
  • Jigs For Machine Tools (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

La présente invention concerne un dispositif permettant de ménager un évidement dans une pièce à usiner. Ce dispositif présente un outil (30) qui peut être déplacé par un système d'avancement (31), dans une direction d'avancement, et dont au moins un élément d'usinage (35; 35a-35d) permet de ménager ledit évidement (2a-2d) sur ladite pièce à usiner (3a-3e). Cette invention se caractérise en ce que l'outil (30) possède au moins un élément d'usinage (35; 35a-35d) avec une zone d'usinage (40) qui est en forme de coin et qui s'étend d'une extrémité avant (38) à l'extrémité opposée (39) de la zone d'usinage (40) en s'élargissant d'une largeur (b). Cette zone d'usinage correspond sensiblement à l'étendue axiale (I) de l'évidement à ménager (2a-2d) et s'élève à partir de la surface de base (36) de l'outil (30) jusqu'à une hauteur (h) qui correspond au moins à la profondeur (t) de l'évidement à ménager (2a-2d). Cette invention se caractérise également en ce que le dispositif (1) présente un système (10, 11; 20, 21) par lequel l'outil (30) peut être alimenté avec une force d'usinage variable, dans une direction d'usinage (B).
PCT/EP2000/008208 1999-08-28 2000-08-23 Dispositif et procede permettant de menager un evidement dans une piece a usiner WO2001015827A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT00954644T ATE250474T1 (de) 1999-08-28 2000-08-23 Vorrichtung und verfahren zum einbringen einer vertiefung in ein werkstück
KR1020027002441A KR20020053056A (ko) 1999-08-28 2000-08-23 작업피스에 오목부를 형성하는 장치 및 방법
JP2001520228A JP2003508225A (ja) 1999-08-28 2000-08-23 ワークに凹みを形成するための装置および方法
HU0203327A HUP0203327A2 (en) 1999-08-28 2000-08-23 Device and method for forming a recess in a workpiece
DE50003853T DE50003853D1 (de) 1999-08-28 2000-08-23 Vorrichtung und verfahren zum einbringen einer vertiefung in ein werkstück
CA002381844A CA2381844A1 (fr) 1999-08-28 2000-08-23 Dispositif et procede permettant de menager un evidement dans une piece a usiner
EP00954644A EP1212155B1 (fr) 1999-08-28 2000-08-23 Dispositif et procede permettant de menager un evidement dans une piece a usiner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19940995.1 1999-08-28
DE19940995A DE19940995A1 (de) 1999-08-28 1999-08-28 Vorrichtung zum Einbringen einer Vertiefung in ein Werkstück

Publications (1)

Publication Number Publication Date
WO2001015827A1 true WO2001015827A1 (fr) 2001-03-08

Family

ID=7920001

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/008208 WO2001015827A1 (fr) 1999-08-28 2000-08-23 Dispositif et procede permettant de menager un evidement dans une piece a usiner

Country Status (9)

Country Link
EP (1) EP1212155B1 (fr)
JP (1) JP2003508225A (fr)
KR (1) KR20020053056A (fr)
AT (1) ATE250474T1 (fr)
CA (1) CA2381844A1 (fr)
CZ (1) CZ2002732A3 (fr)
DE (2) DE19940995A1 (fr)
HU (1) HUP0203327A2 (fr)
WO (1) WO2001015827A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015012694A1 (de) 2015-09-26 2017-03-30 Icm - Institut Chemnitzer Maschinen- Und Anlagenbau E.V. Verfahren, Werkzeug und Einrichtung zum Einbringen einer einen Hohlkörper schneidenden Vertiefung durch wenigstens teilweise Druckumformung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171371A (en) * 1937-12-24 1939-08-29 Du Pont Crimping device
US3656879A (en) * 1969-01-14 1972-04-18 N L Applic Sa Method of manufacturing a burner and a burner thus manufactured

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171371A (en) * 1937-12-24 1939-08-29 Du Pont Crimping device
US3656879A (en) * 1969-01-14 1972-04-18 N L Applic Sa Method of manufacturing a burner and a burner thus manufactured

Also Published As

Publication number Publication date
DE19940995A1 (de) 2001-03-15
EP1212155A1 (fr) 2002-06-12
DE50003853D1 (de) 2003-10-30
KR20020053056A (ko) 2002-07-04
JP2003508225A (ja) 2003-03-04
CA2381844A1 (fr) 2001-03-08
CZ2002732A3 (cs) 2002-08-14
EP1212155B1 (fr) 2003-09-24
HUP0203327A2 (en) 2003-01-28
ATE250474T1 (de) 2003-10-15

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