EP0641265B1 - Biegerichtmaschine - Google Patents

Biegerichtmaschine Download PDF

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Publication number
EP0641265B1
EP0641265B1 EP93911735A EP93911735A EP0641265B1 EP 0641265 B1 EP0641265 B1 EP 0641265B1 EP 93911735 A EP93911735 A EP 93911735A EP 93911735 A EP93911735 A EP 93911735A EP 0641265 B1 EP0641265 B1 EP 0641265B1
Authority
EP
European Patent Office
Prior art keywords
straightening
workpiece
machine according
arm
straightening machine
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.)
Expired - Lifetime
Application number
EP93911735A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0641265A1 (de
Inventor
Manfred Deutschewitz
Manfred Mitze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAE Maschinen und Apparatebau Goetzen GmbH
Original Assignee
MAE Maschinen und Apparatebau Goetzen 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 MAE Maschinen und Apparatebau Goetzen GmbH filed Critical MAE Maschinen und Apparatebau Goetzen GmbH
Publication of EP0641265A1 publication Critical patent/EP0641265A1/de
Application granted granted Critical
Publication of EP0641265B1 publication Critical patent/EP0641265B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments

Definitions

  • the invention relates to a bending straightener of the type corresponding to the preamble of claim 1.
  • Straightening takes place in the bending straightening machine according to DE 34 45 544 A1, in that the workpiece, e.g. the pinion shaft or camshaft, at the point where there is a blow, is deflected between two straightening pads against the blow by a straightening stamp until a permanent deformation occurs which is opposite to the blow and cancels it.
  • the position of the impact is determined by rotating the workpiece by suitable measuring devices in the longitudinal and circumferential directions. Either a single straightening punch is moved in a suitable manner along a workpiece arranged in the longitudinal direction, or the workpiece is shifted past a stationary straightening punch in the longitudinal direction, or there are several straightening dies distributed over the length which are actuated as required.
  • the workpiece is usually rotatably supported between the center of the grain as a workpiece holder.
  • the leveling pads on which the workpiece rests absorb the forces of the leveling stamp. For a specific workpiece, of which a series is to be straightened, they remain at fixed locations, seen in the longitudinal direction of the workpiece.
  • the straightening die which is attached to an upper machine part, is driven vertically by a hydraulic piston / cylinder unit.
  • the machine upper part is designed in the above cases either as an upper cross member of a double column press or as an upper cross member of a single column press with a C-shaped stand.
  • a stable machine upper part extending over the workpiece is required to support the actuating device or the drive for the straightening punch.
  • This drive in turn has a certain size, because the piston / cylinder unit must have a certain cross-section due to the forces occurring and consequently because of the necessary guide length of the piston a certain length.
  • a two-armed lever is mounted above the C-shaped stand, one arm of which engages a spindle which carries the straightening plunger and on the other arm a drive cylinder arranged behind the C-shaped stand acts.
  • the entire bending straightening machine is rotated through 90 °, so that the straightening force is exerted horizontally and the straightening documents or the straightening punch in a horizontal plane transverse to the longitudinal direction of the Workpiece are brought.
  • this type of bending straightening machines which usually have a similar machine stand in the form of a "C”
  • the force acting on the straightening punch or stamps on a machine part located in front of the workpiece and corresponding to the machine upper part in the above-mentioned embodiment is replaced by one or generated several hydraulic piston / cylinder units.
  • the SU-A1-14O4 141 on which the preamble of claim 1 is based includes a hydraulically pivotable two-armed lever, in which the straightening punch is attached to the free end of one arm and moves on an arc when straightening.
  • All known bending straighteners have the Machine upper part or the side part corresponding to the machine upper part in the horizontal version has a considerable size.
  • the structural effort required for the frame or the frame is further increased by the piston / cylinder units forming a linear hydraulic drive of the straightening stamp.
  • the invention is based on the object of designing a bending straightening machine of the type corresponding to the preamble of claim 1 in such a way that the size, construction costs and energy input during operation are reduced.
  • the one or more directional stamps are therefore driven by a swivel device.
  • the propulsion of the straightening stamps is no longer done by a linear drive, which acts directly against the workpiece from the outside and needs the appropriate space, but by a swivel arrangement that allows the drive to be moved from the radial position with respect to the workpiece and thus a much more compact design .
  • the swivel drive means the drive during the straightening stroke, that is to say during the application of force, not possible displacements of the straightening dies to be referred to as a swiveling movement in order to bring them into the straightening position, and also not possible corresponding displacements of the workpiece before the straightening process.
  • the pivoting device is arranged so that the straightening punch at the location of the workpiece essentially as before exert a force perpendicular to this opposite to the standard documents. It is particularly advantageous in the bending straightening machine according to the present invention that the swivel drive can be realized below the swivel bearing of the two-armed lever or under the machine table below the height of the work process. This allows the overall height above the workpiece to be kept small and the accessibility for the automatic loading devices to be improved, and the swivel drive remains within the outline of the straightening machine, ie it does not unload upwards and / or backwards as in the prior art.
  • the directional stamps move on a circular arc when swiveled.
  • the associated error in the alignment of the straightening force is of no importance, however, since a straightening stroke of a maximum of 20 mm is sufficient for the workpieces to be machined and the swivel arrangement can be designed and dimensioned such that the straightening punch is only slightly offset laterally in the area of the straightening stroke relative to the center of the workpiece becomes.
  • the deflection is less than 5 ⁇ of the straightening stroke and is therefore without influence for the straightening stroke.
  • the pivot axis of the pivot bearing of the two-armed lever is further arranged parallel to the longitudinal axis of the workpiece, although embodiments with transverse to the longitudinal axis of the workpiece are not excluded in principle.
  • the embodiment according to claim 3 allows a construction in which only the straightening dies and their support arrangement are present above the workpiece.
  • Claims 4 and 5 designations of the two-armed lever, in which the forces of the drive act transversely to the direction of the one arm, the other time essentially in the direction of the one arm.
  • the pivotable unit can act on a single straightening stamp that is firmly connected to it. Usually, however, several straightening stamps are distributed and / or displaceable along the workpiece, so that the straightening stamp arrangement has a certain extent along the workpiece.
  • the drive is designed as a linear drive with the features of claims 1O to 12.
  • the drive can act directly on the other, free end of the other arm of the two-armed lever, but it can also be interposed according to claim 14, a non-uniformly geared transmission.
  • An important embodiment of the drive comprises a rotatable cam, which offers the advantage that the drive course and thus the stroke course of the straightening plunger can be freely selected (claim 18).
  • the axis of the cam plate is expediently arranged vertically below the free end of the substantially horizontal other arm of the two-armed lever (claim 19).
  • the drive can be moved to the lower area of the machine frame and the space in the area of the workpiece remains free of drive parts.
  • the workpiece 2O is shown schematically as an elongated cylindrical body, the axis of which is perpendicular to the plane of the drawing.
  • the outline of workpiece 2O can also be irregular.
  • camshafts, drive shafts for motor vehicles, pinion shafts or the like are camshafts, drive shafts for motor vehicles, pinion shafts or the like.
  • the workpiece 2O lies on straightening pads, not shown in FIG. 1, which are spaced apart from one another in the axial direction and are arranged on the fixed machine table 10. Between the straightening documents, the straightening stamp 14 acts as a whole on one with 30 designated pivoting device from above onto the workpiece 20 and bends it to a desired extent downward against an existing stroke of the same, which is displaced upward by rotating the workpiece 20, in order to bring about a permanent deformation that cancels out this stroke and straightens the workpiece 20.
  • the straightening stamp 14 is attached to a straightening hammer 18, which is shown only schematically by a dash-dotted rectangle in FIG. 1, which in turn is attached via a dovetail to the underside of a swivel head 37 which extends approximately horizontally over the workpiece 20 from the side.
  • the swivel head 37 is seated on a connecting member 33 which extends parallel to the workpiece 20 and is designed as a tube and which is attached at one end to the free end of an upright arm 36 'of a two-armed lever 36 which is centered in a machine-fixed swivel bearing 32 is pivotally mounted, the pivot axis 32 'extends parallel to the workpiece axis.
  • the two-armed lever 36 as the part determining the pivoting movement is highlighted in FIG. 1 as well as in the corresponding other FIGS. It is essentially stretched and upright, ie the other arm 36 ′′ points downward beyond the pivot bearing 32 in essentially the same direction as the one arm 36 ′. However, the other arm 36 ′′ is bent away from the workpiece 20 by a small angle 19, in the exemplary embodiment 18 ° relative to the arm 36 ′.
  • the reason for this is that the drive spindle 35 belonging to the swivel drive 31 of the two-armed lever 36 can be arranged as centrally as possible under the workpiece 20.
  • the drive spindle 35 loads to the same side as the swivel head 37 from the two-armed lever 36 transversely to this under the machine table 10 and is driven by an electric motor 34 shown in FIG. 2, which is indicated in FIG. 1 by the arrow 45.
  • a spindle nut 35 is arranged on the spindle 35, which carries lateral bearing journals 47, which are mounted in bearings in the eyes of fork cheeks 48 arranged on both sides of the spindle nut 46.
  • the fork cheeks 48 are attached to the lower end of the other arm 36 ′′ of the two-armed lever 36.
  • the spindle nut 46 moves in the direction of the arrow 39 and pivots the lever 36, the fork cheeks 48 connected to it rotating relative to the spindle nut about an axis 49 running perpendicular to the plane of the drawing in FIG. 1 Twist 46.
  • the spindle 35 is mounted on its right-hand end in FIG. 1 in bearings 44 which can cope with the slight pivoting of the spindle 35 which occurs when the spindle nut 46 or the two-armed lever 36 is displaced.
  • the bearings 44 are either designed as self-aligning bearings or have enough play around the transverse axis. The stroke that occurs in practice is not too large.
  • FIG. 1 A limit position of the two-armed lever is shown in Fig. 1 in a dashed position, in which the plunger 14 is lifted from the workpiece 20 and this can be changed. If the straightening punch 14 is to be moved downwards and to perform its straightening stroke, the spindle nut 46 is shifted to the left by a corresponding rotation of the spindle 35 according to FIG. 1.
  • the bending straightening machine 100 in which the arrangement according to FIG. 1 is used, is shown more completely. It comprises a conventional machine stand 50 with the machine table 10 arranged thereon, on which the workpiece holders 12 are built.
  • the workpiece receptacles 12 have the shape of quills with center points 13 in the exemplary embodiment engage in corresponding countersinks in the ends of the rod-shaped workpiece 20.
  • a plurality of straightening pads 16, which support the workpiece 20 against the force of the straightening punches 14 acting on it from above, are mounted on a positioning rail and can be displaced with a drive 22 (FIG. 2) transversely to the axis of the workpiece 20 and also in the longitudinal direction thereof.
  • the straightening stamps 14 can also be moved on a positioning rail with the aid of drives 23 transversely to the workpiece 20 and also in the longitudinal direction thereof.
  • the holder of the straightening stamp 14 on the swivel head 37 forms the so-called straightening hammer 18, on which the straightening stamp 14 is attached by means of a dovetail guide.
  • three alignment stamps are provided, but other numbers can also be considered.
  • the runout deviation of the workpiece 20, ie the "impact”, is measured with buttons 17, four of which are present in the exemplary embodiment.
  • the swivel head 37 with the straightening punch 14 is pressed down by the two-armed lever 36 during the bending straightening process against the workpiece 20.
  • there are two pivot heads 37 (FIG. 3) which have a spacing in the longitudinal direction of the workpiece 20 and which project substantially horizontally. They are attached to a connecting tube 33 formed as a stable tube and extending along the workpiece 20, which is connected at one end to the upper end of the upright one arm 36 'and two-armed lever 36, at the other end to the upper end of an arm 36' in size and alignment of the corresponding lever 56 which is pivotally supported on the end of the machine table 10 opposite the longitudinal direction of the workpiece 20 in a 52 bearing corresponding to the bearing 32 of the two-armed lever 36.
  • the two-armed lever 36 ' is therefore only provided on one side and becomes the one-armed lever 56, which is connected by the connecting member 33 to the Arm 36 'is connected to a torsionally rigid unit 30, only moved.
  • a second two-armed lever 36 with its own drive could also be provided at the other end via a synchronously rotating spindle 35.
  • a further tubular connecting member could be provided instead of the fork cheeks 48 and a single linear drive could engage in the middle thereof.
  • pivot bearings 32, 52 are arranged with their aligned axes exactly at the height of the axis of the workpiece 20 to be straightened.
  • the workpieces 20 are fed in and out by means of a walking beam conveyor 40, which can only be seen in FIG. 2.
  • the lifting beams 42, 44 extend transversely to the workpieces 20 through the machine and convey the workpieces intermittently until they are clamped between the center points 13 and after the bending direction has been carried out for the workpiece removal 43.
  • the lifting beams 42, 44 are driven by lifting gear 41.
  • the pivotable structural unit 230 is driven by a linear drive 231 which, as in FIG. 1, comprises a rotatable spindle 35 which is fixed to the machine in a bearing 44 at the right end.
  • a linear drive 231 which, as in FIG. 1, comprises a rotatable spindle 35 which is fixed to the machine in a bearing 44 at the right end.
  • Two links 238, 239 of approximately the same length in the exemplary embodiment carry fork cheeks 248, 250 at mutually facing ends, overlap the opposite sides of a joint block 235 forming the spindle nut and are mounted on pivot pins 240 projecting laterally from the joint block 235 about a common axis 249.
  • the spindle 35 engages in a spindle thread in the joint block 235, so that the joint block 235 shifts to the right when the spindle 35 rotates accordingly, for example according to FIG. 4.
  • the links 238, 239 pivot about the axis 249.
  • the lower end of the lower link 238 is mounted in a machine-fixed bearing 241, the upper end of the upper link 239 in a bearing 234 at the free end of the lower, substantially horizontal arm 236 ′′ of the two-armed lever 236.
  • the one arm 236 ′ of the lever 236 extends approximately vertically upwards and carries the swivel head 237 which, as in FIG. 1, projects approximately horizontally over the workpiece 20 and is attached to the tubular connecting member 233.
  • the two-armed lever 236 is supported in its apex in a bearing 232 on the top of the machine table 10 and can be pivoted about its axis 232 '.
  • the two links 238, 239 form a small angle 219 of approximately 30 ° with one another, the bisector of which is given by the axis of the spindle 35.
  • the links 238, 239 thus form a toggle lever mechanism which, when the joint block 235 is displaced to the right, presses the essentially horizontal arm 236 ′′ projecting backwards from the workpiece 20 and thereby pivots the two-armed lever 236 in the direction of the straightening stroke.
  • the smaller the angle 219 the stronger the translation of the force of the spindle 235 through the toggle joint 238, 239.
  • the arrangement is such that, in the position of the toggle joint 237, 238 and the two-armed lever 236 shown, which corresponds to the beginning of the straightening stroke, there is a smaller angle 219 and when lifting the swivel head into the position indicated by dashed lines, a displacement of the toggle joint 238, 239 into the area of larger angles 219 takes place, so that a rapid rapid traverse and an optimally translated force action are given in the actual working area.
  • a third embodiment 300 of the straightening machine is indicated, in which a drive motor 234 is arranged below the machine table 10 on the machine frame 50 and acts on a reduction gear 315, on which a cam disc 320 on a shaft 318 is perpendicular to the plane of the drawing Axis 319 is rotatable.
  • the pressure transmission link 323 is arranged at its upper end on the right end of the substantially horizontal arm 336 ′′ of a two-armed lever 336.
  • the two-armed lever 336 is pivotable on a machine-fixed bearing 332 about an axis 332 parallel to the workpiece 20.
  • the arm 336 ' extends upwards from the bearing 332 and protrudes to the left over the workpiece 20 as shown in FIG. 5, so that the arm 36' there and the swivel head 37 are formed in one part as compared to FIG. 1.
  • the two-armed lever 336 is formed by a plate, but nevertheless functions as a two-armed lever in terms of the arrangement of the force application points.
  • the pressure transmission link 323 and the two-armed lever 336 together form the swivel device 330.
  • the pressure transmission link 323 is guided essentially vertically by a link 324 articulated laterally at its lower end and extending essentially horizontally to a fixing point on the machine frame 50, so that the support point 325 always remains essentially vertically above the axis of rotation 319 of the cam plate 320.
  • the curve shape of the cam disc 320 can be selected so that there is a significant force transmission in the region of the straightening stroke and when the straightening plunger 14 is lifted off the workpiece 20, especially in the last phase, a rapid stroke takes place in rapid traverse.
  • the workpieces 20 are transported by a leveling device 40 through the straightening machine 300.
  • cam disc 320 The arrangement shown with cam disc 320, pressure transmission link 323 and two-armed lever 336 is present on the two ends of the machine table 10 that are opposite one another in the longitudinal direction of the workpiece 20.
  • the two two-armed levers 336 form a uniform torsion-resistant component 330 due to the connecting member 333, which also extends in the longitudinal direction of the workpiece 20 and is formed by a box girder.
  • the straightening machine 300 of FIG. 5 is particularly preferred because it not only reduces the structural complexity compared to the conventional straightening machines, but also because the mechanical drive via the cam disk 320 and the electric motor 334 can reduce the energy input to almost a third.
EP93911735A 1992-05-13 1993-05-07 Biegerichtmaschine Expired - Lifetime EP0641265B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4215795A DE4215795C1 (de) 1992-05-13 1992-05-13 Biegerichtmaschine
DE4215795 1992-05-13
PCT/DE1993/000404 WO1993023184A1 (de) 1992-05-13 1993-05-07 Biegerichtmaschine

Publications (2)

Publication Number Publication Date
EP0641265A1 EP0641265A1 (de) 1995-03-08
EP0641265B1 true EP0641265B1 (de) 1997-12-10

Family

ID=6458781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93911735A Expired - Lifetime EP0641265B1 (de) 1992-05-13 1993-05-07 Biegerichtmaschine

Country Status (5)

Country Link
US (1) US5622075A (un)
EP (1) EP0641265B1 (un)
DE (2) DE4215795C1 (un)
ES (1) ES2110093T3 (un)
WO (1) WO1993023184A1 (un)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006008001U1 (de) * 2006-05-17 2007-09-27 MAE Maschinen- und Apparatebau Götzen GmbH & Co. KG Biegerichtmaschine für längliche Werkstücke

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647894A1 (de) * 1996-11-20 1998-06-04 Kbh Produktions Automation Gmb Biegerichtmaschine
EP1093867B2 (en) * 1999-07-12 2008-06-25 Eitel Presses, Inc. Bend-straightening machine with drive mounted on top of press frame
DE19948050C1 (de) * 1999-10-06 2001-09-27 Rossendorf Forschzent Spindelmutterhalterung für ein Spindelgetriebe zum Antrieb von Hebeln
DE102007051903A1 (de) 2007-10-29 2009-04-30 MAE Maschinen- und Apparatebau Götzen GmbH & Co. KG Verfahren und Vorrichtung zum Messen und Richten von Rundlauffehlern an Getriebewellen mit Verzahnungen
DE202016000094U1 (de) 2016-01-12 2017-04-18 MAE Maschinen- und Apparatebau Götzen GmbH Richtpresse zum Richten von Rundlauf- oder Geradheitsfehlern an lang gestreckten Werkstücken mit mindestens einem Wendelbereich, wie an Förderschnecken, insbesondere an Extruderschnecken
DE202016000142U1 (de) 2016-01-13 2017-04-20 MAE Maschinen- und Apparatebau Götzen GmbH Richtpresse zum Richten von Rundlauf- oder Geradheitsfehlern an lang gestreckten Werkstücken mit mindestens einem Wendelbereich, wie an Förderschnecken, insbesondere an Extruderschnecken
DE102018000022A1 (de) 2018-01-05 2019-07-11 M A E Maschinen- Und Apparatebau Götzen Gmbh Verfahren zum Richten von Rundlauf- oder Gradheitsfehlern an langgestreckten Werkstücken, sowie hierfür Messvorrichtung, Richtmaschine und Richtsystem
DE102019114112B4 (de) * 2019-05-27 2021-09-30 Grimm AG Richtpresse und Verfahren zum Biegerichten von länglichen Werkstücken

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FR630782A (fr) * 1927-03-12 1927-12-08 Machine à reconformer les fers de soutènement de mine
US2276941A (en) * 1940-10-02 1942-03-17 Perkins Machine & Gear Co Straightening machine
US3415103A (en) * 1965-09-20 1968-12-10 Colonial Broach & Machine Comp Straightening apparatus and method
DE2606061C3 (de) * 1976-02-16 1981-07-16 Vorwerk, Franz, Dipl.-Ing., 4050 Mönchengladbach Richtpresse
US4080814A (en) * 1976-10-21 1978-03-28 Eaton-Leonard Corporation Set-up guide for bending machine
DE3445544A1 (de) * 1984-06-23 1986-01-02 Karl-Heinz 5804 Herdecke Wolter Vorrichtung zum richten von werkstuecken
SU1368062A1 (ru) * 1986-08-04 1988-01-23 Проектное Конструкторско-Технологическое Бюро Госкомсельхозтехники Латвсср Пресс дл правки валов
SU1404141A1 (ru) * 1986-10-24 1988-06-23 Омский Филиал Центрального Опытно-Конструкторского Проектно-Технологического Бюро Всесоюзного Научно-Производственного Объединения "Ремдеталь" Устройство дл правки цилиндрических изделий
JPH0675738B2 (ja) * 1988-10-29 1994-09-28 株式会社オグラ スプール弁装置

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PATENT ABSTRACTS OF JAPAN vol. 13, no. 405 (M-868)(3753) 7. September 1989 & JP, A, 11 48 424 (OGURA) 9 June 1989 *
Section PQ, Week 8832, 21. September 1988 Derwent Publications Ltd., London, GB; Class P52, AN 88-226288/32 & SU, A, 1 368 062 (GOSKOMSELKHOZT) *
Section PQ, Week 8851, 8. Februar 1989 Derwent Publications Ltd., London, GB; Class P52, AN 88-367493/51 & SU, A, 1 404 141 (OMSK REMDETAL) 23 June 1988 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006008001U1 (de) * 2006-05-17 2007-09-27 MAE Maschinen- und Apparatebau Götzen GmbH & Co. KG Biegerichtmaschine für längliche Werkstücke

Also Published As

Publication number Publication date
WO1993023184A1 (de) 1993-11-25
DE59307820D1 (de) 1998-01-22
EP0641265A1 (de) 1995-03-08
ES2110093T3 (es) 1998-02-01
US5622075A (en) 1997-04-22
DE4215795C1 (de) 1993-11-04

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