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
  • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
  • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
  • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
• • 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
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/08—Making tubes with welded or soldered seams
  • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
• • 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
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/08—Making tubes with welded or soldered seams
• • 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
  • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
  • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles

Definitions

• the invention relates to a method for producing a longitudinally welded hollow profile from a defined longitudinal edges having sheet metal blank, in which initially the sheet metal blank by means of at least two tool parts, each having a recess which determines the outer shape of at least a portion of the hollow profile to be produced, preformed into a slot profile is and in which subsequently in the region of the slot profile facing each other longitudinal edges of the sheet metal blank are welded together.
• the invention relates to an apparatus for producing a longitudinally welded hollow profile from a defined longitudinal edges having sheet metal blank, with at least two tool parts whose relative position is variable and each having a recess which determines the outer shape of at least a portion of the hollow profile to be produced, and with a welding device is equipped for welding the longitudinal edges of the sheet metal blank after its deformation into a slot profile.
• Tailored tubes are such tube elements which are composed of sheet metal sections, resp. whose material properties are adapted to the loads and requirements occurring in practical use or in the shaping process.
• a production of longitudinally welded pipe elements in a station enabling device of the type described is known for example from DE-PS 966 111.
• the sheet metal blank is formed into a slot pipe and welded.
• the longitudinal edges of the sheet metal blank are aligned parallel to the Ausnehinitch the mold halves so that the tool halves receive their respective associated edges when moving together and viewed in cross section circular arc to move toward each other.
• a major disadvantage of the known from DE-PS 966 111 approach is that it requires a certain minimum stiffness of the processed sheet. This is the only way to ensure that the sheet curves uniformly to the slotted tube when the tool halves move together. Thin sheets can not be targeted deform in this known manner to a tube with a precisely predetermined cross-sectional shape, but form in the course of the deformation process uncontrollable edges and wrinkles, the pipe element unusable can do. Also, the welding of a slot tube shaped according to the method known from DE-PS 966 111 leads to undesired deformations when the plate is so thin that it can not absorb the forces unavoidably applied to it during welding.
• the thin sheet to be deformed is placed between the tool halves in such a way that its longitudinal edges are threaded during the subsequent movement of the tool halves into the annular gap formed in the respective tool half.
• the longitudinal edges continue to push up the longitudinal gap and the sheet is bent to a slot pipe.
• This designated as "curling" molding process is complete when the longitudinal edges meet in the apex of the slot tube obtained. After a rounding of the edge impact by means of a roller, this slotted tube can be welded in the region of its slot without the need to spend the tube in another device.
• the object of the invention to provide a method and an apparatus that allow the cost-effective production of precisely shaped hollow profiles in a simple manner.
• this object is achieved in that, in order to produce the slot profile, the sheet metal blank is placed by a change in the relative position of the tool parts freely to a positioned between the tool parts, extending in the longitudinal direction of the sheet metal mandrel , whose outer shape determines the inner shape of the hollow profile to be produced, and that the slot profile thus obtained is subsequently finished in one or more stages by a further change in the relative position of the tool parts.
• the above-mentioned object with respect to a device of the type specified is achieved in that such a device according to the invention a mandrel whose outer shape corresponds to the inner shape of the hollow profile to be produced, and a control device, the control signals to take place in at least two stages Changing the relative position of the tool parts emits from a remote starting position in a mold position.
• each of the hollow section to be deformed sheet metal blank is rolled up around a mandrel, which determines the inner shape of the profile to be produced.
• the application of the sheet metal blank to the mandrel takes place with the help of tool parts, relative to each other and to the Thorn to be moved.
• the respective change in the relative position of the tool parts can be effected in that the tool parts are moved synchronously toward or away from each other.
• the sheet metal blank is actively inserted into the recess provided for the shaping of the stationary tool part. This can be done with the help of the second, movable tool part.
• the mandrel and the base plate may be used individually or together to hold and move the sheet metal blank as it is deformed.
• a calibration of the obtained, initially coarsely shaped slot profile takes place.
• This calibration is effected by a further change in the relative position of the tool parts.
• the tool parts can optionally be pressed individually or jointly against the mandrel in order to adapt the shape of the slot profile perfectly to the final shape of the hollow profile predetermined by the desired manufacturing result. The pre-formed in this way slot profile can then be welded easily.
• a particularly practical embodiment of the method according to the invention is characterized in that the sheet metal blank is placed on a base plate between the Tool parts is placed and the mandrel is then pressed against the plate lying on the base plate to exert a holding force on the sheet, by which a lateral displacement of the sheet is prevented.
• the mandrel fulfills a double function by, on the one hand, reproducing the shape of the hollow profile to be produced and, on the other hand, serving as a holder, by means of which the secure, positionally accurate hold of the sheet metal blank is ensured during its deformation.
• the mandrel may be designed such that it has a length-constant shape in the region facing the sheet-metal blank. Such a shape is, for example, when the mandrel is cylindrical, block, box or tube-like. A counterpart corresponding to the mandrel is present in the form of the counterplate. Due to the force exerted by the mandrel, the sheet metal blank can be embossed between the base plate and the mandrel. It is also conceivable to provide only one recess in the base plate, wherein the embossing between the sheet metal blank and the base plate is effected by the force exerted by the mandrel and thus a positive connection can be provided.
• a positive connection of the type can be realized that the transverse edges of the sheet metal blank by existing on both sides of the base mold elements by laterally applied to the sheet metal blank Holding elements against a Slipping secured.
• a positive retention of the sheet can also be realized in that provided on the base plate, for example, elevations, such as pins, bolts or the like, which cooperate positively with corresponding form elements, such as recesses, the sheet metal blank.
• suitable form elements can be realized on the mandrel, which in turn cooperate with form elements of the sheet to ensure its positive fit.
• the deformation of the sheet metal blank takes place in at least two stages.
• Such performed deformation proves to be particularly advantageous in the processing of thin sheets, if particularly precisely shaped hollow sections to be produced.
• the multi-stage production makes it possible to preform the slot profile produced from the sheet metal blank initially in a rough approximation to the final shape, in order then to bring it in one or more steps in its final form.
• This approach is contrary to the tendency of each processed sheets not to deform when pushed into the recesses of the tool parts in a continuous arc, but gradually fold over, the transitions between the individual bent steps are soft.
• the slot profile formed from the sheet metal blank then has a polygonal cross-section, which is then brought into its final shape in at least one further processing stage, the calibration process, according to the invention.
• the longitudinal edges of the previously obtained slot profile are guided by means of a hold-down.
• a hold-down makes it possible to align the longitudinal edges of the sheet metal blank in the region of the slot of the slot profile formed from it parallel and in a common plane.
• the hold-down is set up so that the width of the slot of the slot profile at each stage of the Calibration is reduced.
• the longitudinal edges in the region of the slot of the slot profile can be kept at a predetermined distance.
• the secure support provided by the holddown of the slot profile also in the region of its slot makes it possible to perform before the longitudinal seam welding in addition to the calibration effect, a smoothing of the edges of the sheet metal blank. In this way, welds of high quality can be produced, as required in particular in the manufacture of components for the body shop.
• a recess is formed in the mandrel which is positioned in the region which is associated with the longitudinal weld seam to be produced on the profile to be produced.
• the method of the invention does not necessarily assume that the mandrel remains in the slot profile during welding. Rather, it has been found that the tool parts used according to the invention and the inherent rigidity achieved by the calibration of the slotted tube are often sufficient in the case of corresponding sheet qualities, in order to ensure sufficient dimensional stability of the slit profile even during the welding. It is therefore provided according to a further variant of the invention to remove the mandrel from the slot profile between the calibration and the welding of the slot profile.
• a holding device can be provided, which is designed, for example, in the form of hooks and, if necessary, engages in the slot of the slot profile in order to keep the slot at the required for the extension of the mandrel small retraction of the tool parts to a specified size.
• the mandrel can then be easily pulled out of the slot profile. Subsequently, the tool parts are moved together again defined, so that the slot profile held securely for the welding process and the edge impact is closed.
• the mandrel itself can also be produced from a hollow profile, for example in the form of a dimensionally stable tube. Its interior can then be used, for example, to catch the weld residue.
• the extraction of the mandrel from the finished hollow profile can be simplified in that the outer shape of the mandrel is smaller by a small undersize than the inner shape of the hollow profile to be produced. Practical tests have shown that it is sufficient if this undersize is up to 0.2 mm compared to the desired inner shape of the hollow profile to be produced.
• secondary shaping elements such as beads or similar embossings
• the mandrel has an embossing device for embossing the sheet placed around it.
• a mandrel can not have length-constant secondary structures for embossing, provided that it is possible to remove the dome after deformation, which is the case for example with a conical basic structure.
• the embossing device can be designed as an embossing die which can be moved beyond the circumference of the mandrel and in the recesses of the tool parts form elements as a counterpart be provided for the shaping produced by the embossing device.
• an embossing device may be provided in the region of at least one of the recesses of the tool parts, for which purpose the embossing device may likewise be designed as an embossing stamp and in the mandrel a shaped element as a counterpart for the shaping produced by the embossing device.
• the embossing devices used in each case are preferably hydraulically operated in order to apply the required pressing forces safely. It is also conceivable to use pneumatically, mechanically or electrically operated embossing devices.
• the procedure according to the invention in which the longitudinal edges of the sheet metal blank to be deformed move freely along the inner surfaces of the recess provided in the tool parts in the first step of the deformation, makes it possible to produce hollow profiles with non-uniform cross-sectional shapes.
• the recesses formed in the tool parts can be designed differently, wherein the mandrel is adapted in a corresponding manner to the different shape of the recesses.
• the device according to the invention can be equipped with a hold-down, which can be delivered in the direction of the mandrel.
• this hold-down device preferably has a first shoulder, the thickness of which corresponds to a first width of the gap of the slot profile to be preformed from the sheet metal blank, and at least one second shoulder whose thickness is equal to a second width of the Slits of the slot profile is. If a recess is provided in the mandrel, which extends along the weld seam to be produced, then the section with the smallest thickness can have a height that is greater than the thickness of the sheet metal blank to be deformed.
• a further advantageous embodiment of the invention is in this context characterized in that at least one deflection surface is formed on the hold-down, which is positioned at befindlichem in operating position hold-down so that it deflects a striking it longitudinal edge of the sheet metal blank in the direction of the mandrel.
• tool parts can be introduced into the hollow profile by this hydroforming secondary elements.
• the tool parts can be provided with form elements, such as recesses, in which the sheet is pressed in the course of hydroforming.
• FIG. 2 shows a hold-down device used in the device shown in FIG. 1;
• Fig. 3-8 each an operating position of the device of Figure 1 in the deformation of a sheet metal blank to the hollow profile.
• FIG. 9 shows the device according to FIG. 1 during welding of a slot profile formed from the sheet metal blank in a partial cutout in a partially broken perspective view
• 10a shows a second device for forming a hollow profile in the starting position
• FIG. 10b shows the device according to FIG. 10a in a view from above;
• FIG. 11 shows the device according to FIGS. 10a, 10b in a second operating position
• Fig. 12 shows the device according to Figures 10a, 10b in a third operating position.
• the apparatus Vl illustrated in FIGS. 1 to 9 for producing a longitudinally welded hollow profile R which has the shape of a circular tube, comprises two tool parts 2, 3, which are mounted so as to be movable relative to one another on a base plate G.
• the working length of the device Vl for the production of hollow profiles R is for example up to 3,000 mm.
• adjusting devices not shown here are provided, of which in each case several, for example, four, distributed in the longitudinal direction of the tool parts 2.3 may be arranged to uniform as possible movement of the tool parts 2.3 and a like ensure uniform transmission of the forces exerted by the tool parts 2.3 forces.
• the adjusting devices are designed so that they can move the tool parts 2,3 at a speed of 1 mm / s to 80 mm / s and thereby exert a force of at least 7,500 kN.
• each of the other tool part 2.3 associated side of the tool parts 2,3 each have a half-shell-shaped recess is formed 4.5.
• the radius RiA of the concavity of the inner surfaces 6,7 of the recesses 4, 5 corresponds to the outer radius RaR of the tubular hollow profile R to be produced.
• the device Vl has a mandrel 8 made of a solid material, which can be moved from a removal position, not shown here, into a working position, in which it is arranged centrally between the tool parts 2, 3.
• the mandrel 8 can be adjusted in the vertical direction to exert a holding force on a placed on the base plate G between the tool parts located in the starting position 2.3 sheet metal blank B.
• a groove-shaped recess 9 is provided in the mandrel 8 formed, which extends from a narrow, the circumference of the mandrel 8 associated portion 9a in a chamber 9b, in the bottom of a slot 9c is formed, the width of which is again smaller than the width of the portion 9a.
• the width of the narrow portion 9a of the recess 9 corresponds to an excess of the width of the weld S to be produced on the hollow profile R.
• the width of the slit 9c aligned centrally with the narrow portion 9a is smaller than the width of the portion 9a.
• collecting strips 10 are arranged, which serve to catch welding residues.
• the collecting strips 10 are made of a heat-resistant material and can be pulled over openings, not shown, from the mandrel 8.
• the device Vl comprises a sword-shaped hold-down 11 whose length corresponds to the length of the dome 8.
• the hold-down device 11 can be moved by means of an actuating device, not shown, from its working positions assigned to the mandrel 8 into a waiting position arranged laterally of the tool part 2.
• the hold-down device 11 has an upper, sectionally roof-shaped section IIa, whose shoulders IIb, 11c, viewed in cross-section, are oriented obliquely tapering towards the bottom and inside.
• the section IIa is followed by a first paragraph Hd, which extends over the length of the blank holder 11 and which, viewed in cross section, is aligned centrally with the section Ha.
• the thickness Dl of the first paragraph Hd corresponds to the width of the slot Z of one of the Blechzuuß B shaped slot profile Sr after a first deformation stage.
• a second shoulder He of the hold-down 11 is formed. Also this heel He extends over the length of the hold-down. Its thickness D2 corresponds to the width of the slot Z of the slot profile Sr after a second stage of the calibration.
• a slit-like, thin third paragraph Hf formed, which is also seen in cross-section centrally to the other paragraphs Hd, He of the hold 11 and extends over the length thereof.
• the thickness D3 of the third portion is slightly smaller than the width of the slit 9c formed in the bottom of the chamber 9b in the mandrel 8.
• the height H of the third portion Hf is greater than the distance of the opening of the slot 9c in the bottom of the chamber 9b to the circumference of the mandrel 8.
• the third section runs like a blade, seen in cross-section pointed.
• the hold-down device 11 is lowered in the direction of the mandrel 8. At first, its third section Hf dips into the recess 9 and is inserted into the slot 9c. The slot 9c thus forms a guide for the hold-down 11 during the molding process. In the course of the calibration of the hollow profile R, the hold-down 11 is pulled in one or more steps.
• slot profile Sr is preferably a
• Laser welding device 12 used. However, it is also conceivable to use other welding units, such as inductively operating welding devices that allow economic welding of the mutually associated longitudinal edges Bl, B2 in the region of the slot Z of the slot profile Sr.
• the laser welding device 12 is attached to a carrier 13 which can be moved by means of an adjusting device, not shown, along the slot Z. Furthermore, the carrier 13 carries a Nachformrolle 14, which is arranged in the welding direction F with a small distance in front of the laser welding device 12. The edge impact acts with a certain force against the path-controlled Nachformrolle 14 to eliminate a roof-shaped edge formation and to avoid springback of the edges Bl, B2 of the hollow section R in the seam area. At least the laser welding device 12 should be surrounded by a housing, not shown here, to protect the operator from the light radiation.
• the carrier 13 may carry a cleaning device, not shown here, which cleans the welding area before the laser welding device 12 reaches it.
• the cleaning device can suck, pre-brush or rinse off the dirt present in front of the welding area.
• sliding shoes 15 or rollers may be provided, which are also fastened to the carrier 13.
• the carrier 13 may also carry a supply line, via the protective gas in the Welding area is passed.
• the carrier is moved by an adjusting device which is controllable in exactly three degrees of freedom (X, Y, Z direction).
• the device Vl can be designed as a twin device. This makes it possible to load the one device with a new sheet blank B and schematicformen this, while still in the other device, the welding is performed.
• the sheet metal blank B is located on the base plate G. It is pressed firmly and immovably against the base plate G by the mandrel 8, the underside of which has a small flat surface.
• the hold-down device 11 is lowered with its blade-like portion Hf into the slot 9c of the recess 9 until the upper portion Ha of the hold-down 11 sits on the mandrel 8 and acts on the mandrel 8 with a defined pressure force (FIG. 1).
• the two tool parts 2, 3 are pushed towards one another, so that the edges 2.3, 5 of the sheet metal blank B respectively associated with the tool parts 2, 3 are first pushed up and then gradually buckle.
• the mandrel 8 approaches the straight, unfolded leg of the sheet metal blank B, it presses it so far crooked that further kinks occur.
• the hold-down device 11 After relieving the hold-down device 11 by slightly driving up the tool parts 2, 3, the hold-down device 11 is pulled until its second heel becomes free and is in the region of the slot which is bounded by the edges Bl, B2 of the sheet metal blank B. Upon further movement of the tool parts 2, 3, the edges Bl, B2 also abut against the second section He, so that here too a calibration effect with improvement of the roundness of the slot profile Sr formed from the sheet metal blank B arises (FIG. 4).
• the tool parts 2,3 are fed to each other under high pressure, so that an accurate calibration of the slot profile Sr is established with formation of the desired roundness and linearity of the strip edges, which then give an ideal impact.
• the gap remaining between the mandrel 8 and the tool parts 2, 3 is only minimal (FIG. 6).
• the hold-down 11 is pulled out of the recess 9.
• the pulling movement of the blank holder 11 can be combined with a further movement of the tool parts 2,3, so that its tip in the region of Slot Z stands and ensures that the edges Bl, B2 of the slot profile remain exactly in the middle (Fig. 7).
• the hold-down 11 When the hold-down 11 is completely pulled, the slot profile Sr is finished and ready for welding.
• the hold-down 11 is moved from the edge region laterally into its rest position and retracted from the carrier 13, the laser welding device 12, the Nachformrolle 14, the shoe 15 and the other elements not shown here Nachrundungs- and welding unit.
• the post-forming roller 14 When driving over the edge impact formed in the region of the slot Z from one pipe end to the other, the post-forming roller 14 first presses down the edges B1, B2 in a defined manner. In this case, a rounding can be made if the edges Bl, B2 are not formed sufficiently round by the calibration. Subsequent to Nachformrolle 14 of the shoe 15 or a corresponding role immediately before the laser welding device 12, the springback and the height differences of the edges Bl, B2 push away, so that an ideal I-shock. The welding of the slot Z is then carried out by the laser beam emitted by the laser welding device 12 (FIG. 8, 9).
• a new manufacturing process begins with the positioning of the Tool parts 2.3, the insertion of the sheet metal blank B and the positioning of the mandrel 8 on the sheet metal blank B.
• the tool parts 2, 3 have been moved synchronously against the mandrel 8.
• the mandrel 8 can be pressed so firmly against the sheet metal blank B that slipping during deformation is reliably avoided.
• the secure hold of the sheet metal blank B in the deformation can also be supported by the fact that on the base plate G form elements in the form of pins are provided which engage in corresponding recesses of the sheet metal blank B, so that not only a frictional, but also a positive fit of Sheet metal blank B is guaranteed.
• the tool part 2 can be displaced in the direction of the mandrel 8 to form the first half of the slot profile Sr.
• the second tool part 3 is then moved in the direction of the mandrel 8 to produce the second half of the slot profile Sr.
• FIGS. 10a to 12b Another, particularly practical way of realizing the invention is shown in FIGS. 10a to 12b.
• the device V2 shown there has tool parts 102,103, which are designed according to the tool parts 2,3 of the device Vl and each have a recess 104,105.
• the device has a mandrel 108 shaped like the mandrel 8, a hold-down 111 shaped like the hold-down 11, and a base plate G2.
• the first tool part 102 is arranged stationary, while the tool part 103 can be moved by means of suitable, not shown here adjusting devices to the stationary tool part 102 to and from this.
• the mandrel 108 with the hold-down device 111 can be moved in the horizontal direction toward and away from the tool part 102.
• the base plate G2 on which the tool part 103 is displaceably mounted can be moved horizontally in the direction of the stationary tool part 102 by suitable means not shown here.
• the base plate G2 in the region of the transverse edges B3, B4 of the sheet metal blank Bz to be deformed in the device V2 into a tubular slot profile Sr2, there are provided on the base plate G2 form elements 116, 117 in the form of pins. These pin-shaped form elements 116,117 engage with resting on the base plate G2 sheet metal blank Bz form-fitting manner in recesses B5, B6, which are arranged centrally in the transverse edges B3, B4 of the sheet metal blank Bz.
• the latter has, in the region of its end faces on its side assigned to the base plate G2, in each case a recess 118 into which the shaped elements 116, 117 engage when the mandrel 108 is pressed onto the sheet metal blank Bz.
• the sheet metal blank Bz For deforming the respective sheet metal blank Bz for slot profile Sr2, the sheet metal blank Bz is placed on the base plate G2, so that the mold elements 116,117 engage in the recesses B5, B ⁇ of the sheet metal blank Bz and it is held in a form-fitting manner.
• the sheet metal blank Bz is arranged centrally below the mandrel 108, which is then lowered until it presses with a prescribed holding force on the sheet metal blank Bz.
• a frictional connection is applied by means of domes 108 and thus the mold elements 116, 117 can be omitted with the recesses B5, B6 in the sheet metal blank Bz.
• structures in the contact area of the mandrel can provide positive locking.
• the movable tool part 103 is in this case in its starting position remote from the stationary tool part 102, in which the longitudinal edges Bl, B2 of the sheet metal blank Bz lie in the entry of the respectively associated recesses 104, 105 of the tool parts 102, 103.
• the base plate G2 is in a retracted initial position, in which its longitudinal edge assigned to the fixed tool part 102 is arranged just below it (FIGS. 10a, 10b).
• the base plate G2 is then moved with the tool part 103, which is still stationary on it, in the direction of the stationary tool part 102.
• the mandrel 108 is moved with the hold-111 in the direction of the tool part 102, wherein the on the Blechzuintroductory Bz applied holding force is maintained.
• the sheet metal blank Bz is forced in this way to move with its longitudinal edge Bl in the recess 104 of the tool part 102. This movement is completed when the longitudinal edge Bl hits the hold-down 111 and the mandrel 108 has retracted into the recess 104 (FIG. 11).
• the movable tool half 103 is displaced on the now stationary base plate G2 in the direction of the mandrel 108.
• the longitudinal edge B2 of the sheet metal blank Bz is thereby pushed into the recess 105 of the tool part 103 until it also hits the hold-down 111 and the tool part 103 has reached the mandrel 108 (FIG. 12).

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Laser Beam Processing (AREA)

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• 2004
  • 2004-09-24 DE DE102004046687A patent/DE102004046687B3/de not_active Expired - Fee Related
• 2005
  • 2005-09-08 JP JP2007532793A patent/JP2008514429A/ja active Pending
  • 2005-09-08 KR KR1020077009333A patent/KR20070051371A/ko not_active Application Discontinuation
  • 2005-09-08 AT AT05778094T patent/ATE421391T1/de not_active IP Right Cessation
  • 2005-09-08 CN CN2005800321105A patent/CN101065197B/zh not_active Expired - Fee Related
  • 2005-09-08 WO PCT/EP2005/009632 patent/WO2006034773A1/fr active Application Filing
  • 2005-09-08 EP EP05778094A patent/EP1796859B1/fr not_active Not-in-force
  • 2005-09-08 US US11/663,898 patent/US7909226B2/en not_active Expired - Fee Related
  • 2005-09-08 DE DE502005006547T patent/DE502005006547D1/de active Active

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