EP3088096B1 - Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques - Google Patents

Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques Download PDF

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Publication number
EP3088096B1
EP3088096B1 EP15165673.3A EP15165673A EP3088096B1 EP 3088096 B1 EP3088096 B1 EP 3088096B1 EP 15165673 A EP15165673 A EP 15165673A EP 3088096 B1 EP3088096 B1 EP 3088096B1
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EP
European Patent Office
Prior art keywords
forming
workpiece
tool
connecting web
parts
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.)
Active
Application number
EP15165673.3A
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German (de)
English (en)
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EP3088096A1 (fr
Inventor
Marc Klinkhammer
Markus Wilhelm
Takeshi Abiko
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.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
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.)
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Publication date
Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to EP15165673.3A priority Critical patent/EP3088096B1/fr
Priority to JP2016090884A priority patent/JP6738191B2/ja
Priority to CN201610280382.7A priority patent/CN106077278B/zh
Priority to US15/142,666 priority patent/US10058907B2/en
Publication of EP3088096A1 publication Critical patent/EP3088096A1/fr
Application granted granted Critical
Publication of EP3088096B1 publication Critical patent/EP3088096B1/fr
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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders

Definitions

  • the invention also relates to a method for pressure forming a connecting web of the type mentioned, carried out by means of the above forming tool and / or by means of the above machine tool.
  • the previously known forming tool comprises a forming punch with a beveled punch tip and a forming die with a flat support surface and a die recess embedded in the flat support surface.
  • the forming die is the one who Forming die assigned to the other side of a connecting web to be machined. The forming die is moved in the direction of the forming die with a machining stroke carried out along a stroke axis.
  • the forming die acts on the connecting web, which is arranged between the forming die and the forming die, with the beveled die tip.
  • the connecting web is squeezed while reducing the thickness of the connecting web between the forming die and the forming die and also bent over an edge that is formed on the forming die by the support surface and a lateral boundary surface of the die recess running parallel to the stroke axis.
  • a fracture zone with a reduced cross-section compared to the rest of the connecting web is generated on the connecting web.
  • DE 10 2012 011 767 A1 discloses an apparatus and method for dicing a workpiece.
  • a workpiece to be cut is acted upon on both sides by a cutting edge of a notching tool that is V-shaped in cross section.
  • the cutting edges of the notching tool are moved towards one another along a movement axis.
  • the tips of the cutting edges lie opposite one another along the axis of movement and penetrate the workpiece on the respectively assigned side of the workpiece, creating a notch geometry with a V-shaped cross-section, so that a residual thickness of the workpiece remains between the tips of the cutting edges.
  • the workpiece is sheared along the previously created notch geometries and thus divided.
  • U.S. 4,362,078 A relates to a device and a method for the punching processing of plate-like workpieces.
  • a punch tool includes two Punch punches which are arranged on both sides of a workpiece to be processed and each of which has a raised circumferential edge with a V-shaped cross section. The tips of the circumferential edges of the punch lie opposite one another along a stroke axis of the punch.
  • the punches are moved so far towards each other along the stroke axis that their circumferential edges penetrate the workpiece in question and create a V-shaped workpiece groove on the assigned workpiece sides, but do not yet create a cutout on the workpiece.
  • a cutout is produced in a subsequent work step by shearing the workpiece along the V-shaped workpiece grooves.
  • the object of the present invention is to provide devices and methods that make it possible to completely separate workpiece parts that are incompletely separated from one another and connected to one another via connecting webs, which are present as machining products of a separating machining of plate-like workpieces, in such a way that no or at least a slight Post-processing of the workpiece parts is required.
  • this object is achieved by the forming tool and the machine tool according to claims 1 and 12 and by the methods according to claims 14, 15 and 17.
  • a forming tool which, due to the geometry of the forming elements provided on the tool parts of the forming tool, during pressure forming of a connecting web that has remained between two workpiece parts at the end or ends of the connecting web creates a fracture zone which is such that after the breaking of the connecting web no traces, or at most only slight traces, of the connecting web remain on the workpiece part or parts.
  • the forming elements of the tool parts dip into the latter and displace the material of the connecting web in the process. Due to the geometry of the shaping elements of the shaping tool, the material of the connecting web plasticized by the shaping tool is displaced away from the workpiece part or parts adjoining the connecting web.
  • the material of the connecting web plasticized in the course of the forming process does not leave any traces or at most only slight traces on the workpiece part or parts concerned. Burrs formed on the connecting web are removed together with the connecting web and consequently do not impair the quality of the parting surface on the workpiece part or parts.
  • the shaping elements on the tool parts of the shaping tool are offset from one another in the transverse direction of the stroke axis. This results in a gap between the forming members on both sides, which favors an oblique breaking off of the connecting web after forming.
  • An inclined fracture surface on a workpiece part can, for example, be desirable in a case in which an inclined surface is also produced by machining the edges of the workpiece part, to which the inclined fracture surface on the workpiece part can then be matched.
  • the tool parts of the forming tool according to the invention for forming a connecting web perform a single machining stroke or several successive machining strokes.
  • the deformed end of the connecting web only has a relatively small cross section, which is dimensioned in such a way that the connection of the connecting web to the adjacent workpiece part with little effort, for example by moving the machined workpiece to and fro, is at least almost completely can be solved without burrs.
  • the connecting web can be dimensioned before the pressure forming in such a way that it creates a load-bearing connection between the workpiece parts in question.
  • good parts can be connected to one another, but also one or more good parts to a waste part, for example to a scrap skeleton, by connecting webs.
  • the connecting webs can, for example, on straight or curved edges, but also on corners of each other place connected workpiece parts.
  • the connecting webs should be aligned with respect to the forming members of the forming tool in such a way that the connecting webs face the forming members along the stroke axis with surfaces and not with edges. In the event of incomplete separation of the workpiece parts, torsion of the connecting webs about their longitudinal axis must therefore be avoided.
  • material particles that arise, for example, as chips during the pressure forming of a connecting web can be removed from the processing point.
  • at least one of the tool parts of the forming tool according to the invention is provided with a corresponding suction device. The removal of material particles from the processing point also prevents the material particles from leaving traces on the workpiece parts to be separated from one another and thereby reducing the quality of the workpiece processing.
  • the tool parts of the forming tool according to the invention are arranged in tool holders, which are provided on opposite sides of the connecting web to be formed or the workpiece parts connected to one another by the connecting web to be formed and which can be moved relative to one another along the stroke axis of the tool parts under numerical control.
  • tool holders which are provided on opposite sides of the connecting web to be formed or the workpiece parts connected to one another by the connecting web to be formed and which can be moved relative to one another along the stroke axis of the tool parts under numerical control.
  • the workpiece previously machined to be parting usually rests on a conventional workpiece support of the machine tool.
  • a connecting web to be formed is pressurized on both sides by the forming members of the tool parts of the forming tool according to the invention.
  • the line along which the shaping elements dip at one end of the connecting web can run in the extension of a separating surface that was created on the adjacent workpiece part during the creation of the connecting web, but it can also be set back from this separating surface into the interior of the workpiece part . In the latter case, even if small remnants of the connecting bar remain on the workpiece part when the connecting bar is separated from the workpiece part, it is ensured that no remnants of the connecting bar protrude beyond the parting surface created on the workpiece part when the connecting bar was created.
  • the shaping elements overlap with a workpiece part, preferably in the order of magnitude of tenths of a millimeter.
  • the forming method according to the invention is part of the cutting method according to the invention and also part of the machining method according to the invention, in the course of which the separating method according to the invention and additionally a further workpiece machining are carried out.
  • the forming tool according to the invention can be used to shape the connecting web (s) in a manner that is matched to the workpiece machining provided in addition to the separating machining.
  • At least one of the tool parts has a support surface running essentially perpendicular to the stroke axis, from which the forming element of this tool part to the other Tool part protrudes.
  • the support surface forms an abutment for the connecting web to be formed and thereby prevents undesired deformation of the processed connecting web.
  • At least one of the shaping members has a triangular cross-section or a trapezoidal cross-section in a sectional plane running parallel to the stroke axis.
  • a design of the forming tool according to the invention is preferred in which the forming element of one of the tool parts has a triangular cross-section and the forming element of the other tool part has a trapezoidal cross-section.
  • the end face of a forming element with a triangular cross-section is in itself linear.
  • such a shaping element can be provided with a slight flattening or rounding on the triangular tip forming the end face of the shaping element.
  • a shaping element with a trapezoidal cross-section has a flat end face.
  • Cross-sections which deviate from the trapezoidal shape and which form a flat end face on the respective shaping element are also conceivable according to the invention.
  • Forming elements with a triangular or trapezoidal cross-section are provided in a development of the invention in that the forming element of a tool part is formed by a free end of the tool part provided with an inner cavity, preferably an inner cone (claim 5).
  • an inner cavity preferably an inner cone (claim 5).
  • material of the connecting web can flow off into the interior of the cavity formed, for example, by the inner cone. This reduces the resistance which the connecting web opposes to processing by the forming tool according to the invention.
  • a radius or a bevel can be provided at the transition between the end face of the respective forming element and the inner cone. The radius and the bevel ensure, if necessary, that the reshaped connecting web does not break at this point during the final separation of the workpiece parts but rather directly at the attachment of the connecting web to the adjacent workpiece part.
  • a separating surface is created on the workpiece side by the forming elements.
  • At least one of the shaping elements on the workpiece side runs along the stroke axis parallel to the separating surface or at an angle to the separating surface on that workpiece part to which the workpiece side of the shaping element is facing during pressure shaping of the connecting web. If the workpiece side of a forming element is parallel to the separating surface on the workpiece part in question, the separating surface created by means of the forming element on the workpiece part in question also runs parallel to the separating surface of the workpiece part created before the pressure forming of the connecting web.
  • a separating surface that runs parallel to the separating surface on the workpiece part in question is generated by means of the shaping element in particular when the separating surface generated by means of the shaping element extends as an extension of the separating surface already present on the workpiece part.
  • the creation of a separating surface inclined at an angle with respect to the already existing separating surface of the workpiece part by means of the shaping element is, according to the invention, for example in cases provided, in which, before or after the forming of the connecting web, the existing separating surface on the workpiece part is formed by additional edge processing of the workpiece part and is beveled in the process.
  • the inclined surface generated on the workpiece by means of the forming element is aligned with the inclined surface that is created as part of the additional edge processing of the workpiece part.
  • the forming tool according to the invention is designed in such a way that the forming element of one of the tool parts on the workpiece part in question creates a separating surface that runs parallel to the existing separating surface of the workpiece part, while the forming element of the other tool part creates a separating surface that is at an angle opposite the already existing separation surface of the workpiece part.
  • connecting web If a connecting web establishes a connection between two workpiece parts provided as good parts, the connecting web must be separated from both workpiece parts with as little residue as possible.
  • Claim 8 relates to a design of the forming tool according to the invention which is provided for this purpose and which makes it possible to form a connecting web at the same time at several points spaced apart from one another along the connecting web.
  • Each of the reshaping points on the connecting web is processed by two organ sections, one organ section being part of the shaping organ on one workpiece part and the other organ section being part of the shaping organ on the other workpiece part of the shaping tool according to the invention.
  • the shaping elements on the two tool parts of the shaping tool according to the invention run in a circumferential direction and in particular in an arc-shaped manner, preferably along a circular arc, around the stroke axis.
  • the extension of the shaping elements in the circumferential direction can be dimensioned in such a way that the shaping elements come to lie at several points of the connecting web at the same time when a connecting web is shaped.
  • An arc-shaped, in particular a circular course of the deforming elements offers the possibility of arranging the fracture zone at which the connecting web is to break after the deformation on the workpiece part adjoining the connecting web in an area that is opposite to that on this workpiece part before the connecting web is deformed created parting surface is set back into the interior of the workpiece part.
  • a circular course of the shaping elements is also advantageous insofar as by simply rotating the tool parts around a positioning axis concentric with the shaping elements, different organ sections of the shaping elements can be assigned to one and the same processing point and / or one and the same organ sections to different machining points.
  • the successive use of different organ sections of a forming organ is particularly recommended because of the associated equalization of tool wear.
  • At least one of the forming members is designed to be endless in the circumferential direction.
  • shaping elements segmented in the circumferential direction are also conceivable.
  • Claim 11 relates to a design of the forming tool according to the invention, which enables a force-dependent control of the machining stroke of the tool parts of the forming tool.
  • a mutual support of the tool parts effective along the stroke axis while bypassing the pressure-formed connecting web is implemented in a preferred embodiment of the forming tool according to the invention by at least one of the Tool parts has a portal-like shape and engages over the connecting web to be formed while it is being processed.
  • the portal supports of the relevant tool part can be placed on the other tool part laterally next to the connecting web at the end of the stroke position of the two tool parts.
  • the shaping element can be arranged on the tool part or parts provided with at least one projection between the portal supports.
  • the at least one connecting web when machining a plate-like workpiece from an elastically deformable material, is created as a solid body joint and is resilient in the transverse direction of the parting surfaces of the workpiece parts connected to one another by the connecting web. If such a connecting web is deformed by means of the forming tool according to the invention and pressurized at two points spaced apart from one another along the connecting web, in particular at both opposite ends of the connecting web, the area of the connecting web located between the two contact points of the forming tool can be made use of the elasticity of the connecting web be compressed. As a result, only a relatively small amount of force has to be applied to reshape the connecting web.
  • a machine tool 1 is designed as a punch-laser combination machine.
  • a machine frame 2 of the machine tool 1 has a C-shape and has an upper frame leg 3 and a lower frame leg 4. At the free ends of the upper frame leg 3 and the lower frame leg 4, a laser cutting station 5 and a forming station 6 are provided.
  • the laser cutting station 5 comprises a laser cutting head 7 on the upper frame leg 3 and a laser beam holder 8 on the lower frame leg 4.
  • the forming station 6 has an upper tool holder 9 on the upper frame leg 3 and a lower tool holder 10 on the lower frame leg 4.
  • An upper tool embodied as a forming punch 11 is exchanged into the upper tool holder 9, and a lower tool embodied as a shaping die 12 is exchanged into the lower tool holder 10.
  • the forming punch 11 and the forming die 12 are tool parts of a forming tool 13.
  • the forming die 11 can be raised and lowered along a lifting axis 14 relative to the forming die 12.
  • the upper tool holder 9 and the lower tool holder 10, together with the forming punch 11 and the forming die 12, can be adjusted to rotate about the lifting axis 14 (double arrow in Figure 1 ). All functions of the machine tool 1 are controlled by a programmable numerical control.
  • Plate-like workpieces in the illustrated example a sheet metal 15, are processed at the laser cutting station 5 and at the forming station 6.
  • the sheet metal 15 is moved by means of a conventional coordinate guide 16 with a two-axis horizontal movement over a workpiece support 17 of the machine tool 1 and relative to the laser cutting head 7 and the laser beam receptacle 8 and also relative to the forming tool 13.
  • Figure 1 the plate 15 is shown broken off.
  • the laser beam receptacle 8 and the lower tool receptacle 10 with the forming die 12 of the forming tool 13 can be seen in FIG.
  • the sheet metal 15 is first machined in a separating manner at the laser cutting station 5.
  • One possible result of the separating machining of the sheet metal 15 is shown in FIG Figure 2 shown. Accordingly, in the case of the laser cutting head 7 performed separating machining as workpiece parts in Figure 2 scrap skeleton 18, shown broken off, and sheet metal parts 19, 20, 21, 22 provided as good parts, incompletely separated from one another. Due to a movement of the sheet metal 15 generated by means of the coordinate guide 16, a laser beam directed from the laser cutting head 7 onto the sheet 15 cuts the sheet metal parts 19, 20, 21, 22 free, leaving the connecting webs 23 standing.
  • the residual lattice 18 and the sheet metal parts 19, 20, 21, 22 are only incompletely separated from one another.
  • a different type of cutting tool in particular a punching tool exchanged at the forming station 6, could also be used for incomplete separation of the residual lattice 18 and the sheet metal parts 19, 20, 21, 22.
  • the sheet metal 15 is moved to the forming station 6 of the machine tool 1 by means of the coordinate guide 16.
  • the connecting webs 23 are pressure-formed by means of the forming tool 13 that has been exchanged in the upper tool holder 9 and the lower tool holder 10.
  • FIG Figure 3 the forming tool 13 with the forming die 11 provided as the upper tool and the forming die 12 provided as the lower tool is shown in FIG Figure 3 shown.
  • the stroke axis 14 is indicated by dash-dotted lines on both the forming die 11 and the forming die 12, along which the forming die 11 is lowered relative to the forming die 12 with one machining stroke for pressure forming of a connecting web 23.
  • a die-side shaping element 24 and a die-side shaping element 25 lie opposite one another along the stroke axis 14.
  • a flat, circular end face 26 of the die-side forming element 24 and a circular end face 27 of the die-side forming element 25 point toward one another along the stroke axis 14.
  • the free end of the forming die 11 is provided with an inner cone 28.
  • the upper limit of the trapezoidal cross-section of the forming element 24 on the punch side is shown in FIG Figure 5 indicated by an imaginary dashed line.
  • the die-side forming element 25 protrudes from a support surface 29 of the forming die 12 towards the forming die 11.
  • the support surface 29 runs on the forming die 12 perpendicular to the stroke axis 14.
  • the cross section of the die-side forming member 25 has the shape of an isosceles triangle, the base of which lies in the support surface 29 of the forming die 12 and the tip of which forms the linear end face 27 of the die-side forming member 25.
  • Both the punch-side forming element 24 and the die-side shaping element 25 run endlessly along a circular line and thereby concentric with the stroke axis 14.
  • the punch-side shaping element 24 and the die-side shaping element 25 are offset from one another, with the flat face 26 of the punch-side shaping element 24 lies within the linear end face 27 of the forming element 25 on the die side.
  • the processed sheet metal 15 is positioned relative to the forming tool 13 exchanged at the forming station 6 by means of the coordinate guide 16 of the machine tool 1 in such a way that the forming tool 13 assumes a ready-to-process position opposite the connecting web 23 to be formed.
  • the forming die 11 of the forming tool 13 is spaced along the stroke axis 14 from the top of the connecting web 23 and the workpiece parts adjoining it.
  • the end face 27 of the shaping member 25 on the die side is at a minimal distance along the stroke axis 14 from the underside of the connecting web 23 and the workpiece parts connected by it.
  • the vertical projection of the linear end face 27 of the die-side forming element 25 onto the machined sheet 15 runs concentrically with and radially outside the vertical projection of the end face 26 of the punch-side forming element 24.
  • the forming punch 11 is moved with a processing stroke along the stroke axis 14 in the direction of the forming die 12 up to a stroke end position.
  • the machining stroke is controlled as a function of the path, in the example according to the Figure 13 the machining stroke is controlled depending on the force.
  • the amount of the machining stroke performed by the forming die 11 relative to the forming die 12 can be set variably and depends in particular on the desired remaining thickness of the connecting web 23 after the forming.
  • the one covered by the forming die 11 along the stroke axis 14 Distance is recorded by means of a conventional position measuring system and forms the basis for the control of the lifting drive of the machine tool 1.
  • the remaining thickness of the connecting web 23 is also determined by the height of the die-side forming element 25 measured along the stroke axis 14.
  • FIG Figure 5 The conditions at the end of the stroke position of the forming die 11 are shown in FIG Figure 5 illustrated.
  • the end faces 26, 27 of the stamp-side forming element 24 and the die-side forming element 25 are spaced apart from one another which is smaller than the thickness of the undeformed connecting web 23.
  • the connecting web 23, the scrap skeleton 18 and the sheet metal part 20 are affected the impact by the forming die 11 is pressed with its underside against the support surface 29 of the forming die 12.
  • the forming die 11 is immersed in the course of the machining stroke with diametrically opposite organ sections of the die-side forming member 24 at both ends of the connecting web 23 in this and in the adjoining areas of the residual lattice 18 and the sheet metal part 20.
  • a workpiece side 31 of the forming element 24 on the punch side faces the residual lattice 18, and a workpiece side 32 of the forming element 24 on the punch side faces the sheet metal part 20.
  • Web sides 33, 34 of the stamp-side forming member 24 point to the connecting web 23 and are accordingly facing away from the residual lattice 18 and the sheet metal part 20.
  • the conditions at the die-side forming element 25 are represented.
  • the die-side forming element 25 has two diametrically opposed organ sections at the ends of the connecting web in these and in regions of the residual lattice 18 and near the web of the sheet metal part 20 pressed in.
  • Workpiece sides 35, 36 of the die-side forming element 25 face the scrap lattice 18 and the sheet metal part 20
  • web sides 37, 38 of the die-side forming element 25 face away from the scrap lattice 18 and from the sheet metal part 20.
  • the die-side forming element 24 has forming surfaces 40, 41.
  • Forming surfaces 42, 43 are provided on the web sides 37, 38 of the die-side forming element 25.
  • the shaping surfaces 40, 41 of the shaping element 24 on the punch side run, starting from the end face 26 of the shaping element 24 on the punch side, along the stroke axis 14 away from the workpiece sides 31, 32 of the shaping element 24 on the punch side.
  • the shaping surfaces 42, 43 of the die-side shaping element 25 move away from the workpiece sides 35, 36 of the die-side shaping element 25 along the stroke axis 24.
  • plasticized material of the connecting member 23 on the web sides 33, 34, 37, 38 of the forming member 24 on the punch side and the forming member 24 and the die side is produced under the action of the connecting web 23 being acted upon by the forming tool 13
  • the forming element 25 is displaced towards the connecting web 23 and thus away from the workpiece sides 31, 32, 35, 36 of the forming element 24 on the punch side and the shaping element 25 on the die side.
  • the pressure forming by means of the forming tool 13 reduces the cross section of the connecting web 23 along the stroke axis 14. Due to the oversize of the diameter of the end faces 26, 27 of the punch-side forming element 24 and of the die-side forming element 25 compared to the connecting web 23, the cross-sectional areas are reduced Approaches of the connecting web 23 on the residual lattice 18 and on the sheet metal part 20 set back opposite the separating surfaces 39 into the interior of the residual lattice 18 and the sheet metal part 20.
  • a corresponding offset of the approaches of the cross-section-reduced connecting web 23 on the scrap lattice 18 and on the sheet metal part 20 occurs when the separating surfaces 39 on the scrap skeleton 18 and the sheet metal part 20 are already in the separating processing of the sheet metal 15 prior to the pressure forming of the connecting webs 23 with a be provided with a corresponding return ( Figure 6 ).
  • the connecting web 23 and not also an area of the residual lattice 18 and the sheet metal part 20 immediately adjoining the connecting web 23 is to be machined during the pressure forming that follows the separating machining of the sheet metal 15. Accordingly, in the case of the processing situation, according to Figure 6 to apply a lower force for the pressure forming of the connecting web 23 than with the conditions according to FIG Figure 4 .
  • FIG Figures 7 and 8 illustrate by way of example the processing of processing webs 23 intersecting in an X-shape, as they are of the type in FIG Figure 2 between the sheet metal parts 19, 20, 21, 22 are provided.
  • Figure 7 relates to the case that not only the connecting webs 23 themselves but also directly adjacent workpiece areas are to be reshaped, while according to FIG Figure 8 Workpiece areas directly adjoining the connecting webs 23 have already been removed during the previous separating machining of the sheet metal 15 and consequently only the connecting webs 23 need to be reshaped.
  • Figure 9 shows a connecting web 23 provided between two incompletely separated workpiece parts, which, like the rest of the separating machined workpiece, consists of a resilient material and which is also used in the incomplete separation of the adjacent workpiece parts a meander shape has been created. Due to the material and its special shape, the connecting web 23 is resilient and accordingly forms a solid body joint between the two adjacent workpiece parts. If the connecting web 23 according to Figure 9 in the in Figure 5 When pressurized by the forming die 11 and the forming die 12 of the forming tool 13 as illustrated, the connecting web 23 only offers a relatively small resistance to the pressure forming due to its resilience. The resilience of the connecting web 23 facilitates the displacement of plasticized material of the connecting web 23 away from the workpiece sides 31, 32, 35, 36 of the forming member 24 on the punch side and the forming member 25 on the die side.
  • the Figures 10a, 10b and 10c show forming tools 13/1, 13/2, 13/3 structurally different from the forming tool 13, each in the circumference of a forming die 11/1, 11/2, 11/3.
  • a forming element 24/1 on the punch side of the forming punch 11/1 unlike the forming element 24 of the forming punch 11 on the punch side, has an elliptical shape.
  • the forming punch 11/2 is divided in a plane parallel to the stroke axis 14 and consequently has a two-part forming element 24/2 on the punch side, each segment of the forming element 24/2 on the punch side being semicircular.
  • the forming die 11/3 has resulted from the forming die 11/1 by division along a plane running parallel to the stroke axis 14.
  • a forming element 24/3 of the forming die 11/3 on the punch side is consequently also segmented and comprises two halves of identical construction.
  • the reshaping punches 11/1, 11/2, 11/3 are assigned reshaping dies, not shown, with die-side reshaping elements, the geometry of which is adapted to the geometry of the reshaping elements 24/1, 24/2, 24/3 on the punch-side and which, moreover, are adapted to the die-side Forming element 25 of the forming die 12 of the forming tool 13 match.
  • a pressure forming is carried out with several processing strokes of the forming tool 13/1 one after the other at the ends of connecting webs 23.
  • the forming die 11/1 and the forming die assigned to it are set by rotating the upper tool holder 9 and the lower tool holder 10 of the machine tool 1 about the stroke axis 14.
  • the processed sheet metal 15 is positioned relative to the forming tool 13/1 by means of the coordinate guide 16 of the machine tool 1.
  • a simple connecting web 23 is processed by means of the forming tool 13/2.
  • the forming tool 13/3 is used for pressure forming two connecting webs 23 intersecting in an X-shape.
  • the forming tools 13/2, 13/3 perform pressure forming at both ends of a connecting web 23 with a single processing stroke, whereby two successive processing strokes of the forming tool 13/3 are required to process the two X-shaped crossing connecting webs 23 and the forming tool 13 / 3 is rotated about the stroke axis 14 after the first machining stroke.
  • a tool part of a forming tool 13/4 is designed as a forming punch 11/4.
  • the forming punch 11/4 is a second tool part in Figure 13 Forming die 12, not shown, according to FIG Figure 3 assigned.
  • a forming unit 44 of the forming die 11/4 corresponds to the forming die 11 according to FIG Figure 3 match.
  • the forming die 11/4 ends in a die-side forming element 24/4 with a trapezoidal cross-section.
  • the forming die 11/4 has cheeks 45, 46 which protrude from the forming element 24/4 of the forming die 11/4 on the die side along the stroke axis 14 to the forming die 12, not shown, and thereby projections 47, 48 of the forming die 11/4 train.
  • the previously cut sheet metal 15 and the forming tool 13/4 are positioned relative to one another in such a way that during a processing stroke carried out by the forming die 11/4 to the forming die 12, the connecting web 23 to be formed is located between the projections 47, 48 of the Forming punch 11/4 comes to rest.
  • the projections 47, 48 of the forming die 11/4 come into contact with the support surface 29 of the forming die 12 with their end faces leading along the stroke axis 14.
  • the protrusion of the projections 47, 48 with respect to the die-side forming element 24/4 is dimensioned such that at the end of the stroke end position of the forming die 11/4 the end face of the punch-side forming element 24/4 is at a distance from the end face of the die-side forming element 25 along the stroke axis 14 , which corresponds to the desired remaining thickness of the pressure-formed connecting web 23.
  • the forming die 11/4 overlaps the formed connecting web 23 like a portal.
  • the projections 47, 48 of the forming die 11/4 are laterally adjacent to the connecting web 23 in the manner of portal supports.
  • the machining stroke carried out by the forming punch 11/4 relative to the forming die 12 is force-controlled.
  • an in Figure 13 Stroke control device 49 shown hinted at, for the stroke drive of the forming tool 13/4 integrated.
  • the stroke control device 49 comprises a force measuring device 50, an evaluation device 51 and an actuating device 52.
  • the force measuring device 50 measures the amount of support force with which the forming die 11/4 of the forming tool 13/4 is supported along the stroke axis 14 on the forming die 12.
  • the evaluation device 51 the measured actual amount of the support force is compared with a limit amount of the support force stored in the stroke control device 49. If the measured actual amount of the supporting force reaches the predetermined limit amount, this indicates that the forming punch 11/4 along the stroke axis 14 has reached its stroke end position Has.
  • the evaluation device 51 then generates a switching signal for the actuation device 52.
  • the actuation device 52 actuates the stroke drive of the forming tool 13/4 to the effect that the processing stroke of the forming die 12 directed towards the forming die 12 ends and a Return stroke of the forming punch 11/4 is initiated in the opposite direction of the machining stroke.
  • Figure 14 illustrates a method step which is carried out in the machining of the sheet metal 15 in the illustrated example before the pressure forming of the connecting webs 23.
  • sheet metal parts that are incompletely separated from one another are edge-machined on the underside by separating machining while leaving resilient connecting webs 23.
  • a forming roller 53 is provided, which is exchanged in the lower tool holder 10 at the forming station 6 of the machine tool 1.
  • the forming roller 53 acts when machining the sheet metal parts of a sheet metal previously machined in a separating manner with an in Figure 14 counterpressure roller, not shown, which is exchanged into the upper tool holder 9 of the machine tool 1 and which rests on the upper side of the processed sheet metal with a cylindrical outer surface.
  • the forming roller 53 is provided with a double-conical bead 54 which has two conical forming surfaces 55, 56.
  • the latter In order to carry out the edge processing of the incompletely separated sheet metal parts of the sheet metal that has been machined separately, the latter is moved by means of the coordinate guide 16 over the workpiece support 17 of the machine tool 1 in such a way that the forming roller 53 pressed against the sheet metal parts rolls along the edges of the sheet metal parts and thereby on the edges of the sheet metal parts generated by means of the forming surfaces 55, 56 inclined surfaces (chamfers).
  • the approaches of the connecting webs 23 are cut out on the sheet metal parts.
  • the connecting webs 23 are made by means of the Die-side forming member 25 of the forming tool 13 or by means of the die-side forming members of the forming tools 13/1, 13/2, 13/3, 13/4 created a corresponding inclined surface.
  • the sheet metal parts in the example shown in FIG Figure 2 the sheet metal parts 19, 20, 21, 22 of the processed sheet 15, from the associated scrap skeleton (scrap skeleton 18 in Figure 2 ) solved. Due to the cross-sectional reduction of the connecting webs 23, shaking the processed sheet is sufficient for this. Due to the load acting here, the connecting webs 23 break in the fracture zones generated by pressure forming, whereby due to the geometry of the die-side forming elements 24, 24/1, 24/2, 24/3, 24/4 and the associated die-side forming elements of the forming tools 13, 13 / 1, 13/2, 13/3, 13/4 no or at most minimal traces of the connecting webs 23 remain on the sheet metal parts.
  • the diameter-reduced attachments of the connecting webs 23 are set back into the interior of the sheet metal parts, remnants remaining on the sheet metal parts also protrude the connecting webs 23 do not protrude beyond the separating surfaces of the sheet metal parts created before the pressure forming of the connecting webs 23.

Claims (17)

  1. Outil de mise en forme dévolu au formage sous pression d'une membrure de liaison (23) attenante à des parties (18, 19, 20, 21, 22) d'une pièce, par ses extrémités, et reliant les unes aux autres lesdites parties (18, 19, 20, 21, 22) de la pièce qui se présentent comme des produits d'un usinage séparatif d'une pièce du type plaque, d'une tôle (15) en particulier, et sont respectivement munies d'une surface de séparation (39) dans la direction transversale de laquelle ladite membrure de liaison (23) s'étend,
    • comprenant deux parties d'outil (11, 11/1, 11/2, 11/3, 11/4 ; 12) qui, lors du formage sous pression de la membrure de liaison (23), sont affectées à des côtés mutuellement opposés de ladite membrure de liaison (23) et peuvent être mues, l'une par rapport à l'autre, le long d'un axe de déplacement (14) s'étendant dans la direction transversale de la membrure de liaison (23) au cours du formage sous pression de ladite membrure de liaison (23),
    • sachant que lesdites parties (11, 11/1, 11/2, 11/3, 11/4; 12) de l'outil sont pourvues, à chaque fois, d'un organe (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sur des côtés pointant l'un vers l'autre le long de l'axe de déplacement (14), et que des extrémités libres des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sont orientées l'une en direction de l'autre par des faces extrêmes (26, 27), le long dudit axe de déplacement (14),
    • sachant que chacun desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme comporte un côté pièce (31, 32, 35, 36) et un côté membrure (33, 34, 37, 38) et que, lors du formage sous pression de la membrure de liaison (23), le côté pièce (31, 32, 35, 36) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme est tourné vers une seule et même partie (18, 19, 20, 21, 22) de la pièce, et le côté membrure (33, 34, 37, 38) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme pointe à l'opposé de cette partie (18, 19, 20, 21, 22) de ladite pièce, et
    • sachant que lesdites parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) de l'outil peuvent être mues en direction l'une de l'autre le long de l'axe de déplacement (14), en accomplissant une course d'usinage, vers un emplacement de fin de course auquel les faces extrêmes (26, 27) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sont mutuellement espacées, le long dudit axe de déplacement (14), d'une distance inférieure, au cours du formage sous pression de la membrure de liaison (23), à l'étendue de ladite membrure de liaison (23) devant être mise en forme le long dudit axe de déplacement (14),
    • sachant que chacun desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme est pourvu, au niveau du côté membrure (33, 34, 37, 38), d'une surface (40, 41, 42, 43) de mise en forme qui s'éloigne du côté pièce (31, 32, 35, 36) dudit organe (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, le long de l'axe de déplacement (14), à partir de la face extrême (26, 27) dudit organe (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, et
    • sachant que les faces extrêmes (26, 27) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sont mutuellement décalées dans la direction transversale dudit axe de déplacement (14).
  2. Outil de mise en forme selon la revendication 1, caractérisé par le fait qu'au moins l'une des parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) dudit outil est dotée d'une surface de support (29) qui s'étend, pour l'essentiel, perpendiculairement à l'axe de déplacement (14) et au-delà de laquelle l'organe (25) de mise en forme de cette partie (12) dudit outil fait saillie en direction de l'autre partie (11, 11/1, 11/2, 11/3, 11/4) dudit outil.
  3. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait qu'au moins l'un des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme présente une section transversale triangulaire dans un plan de coupe s'étendant parallèlement à l'axe de déplacement (14) ; ou par le fait qu'au moins l'un desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme présente une section transversale trapézoïdale dans un plan de coupe s'étendant parallèlement audit axe de déplacement (14).
  4. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait que, dans un plan de coupe s'étendant parallèlement à l'axe de déplacement (14), l'un des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme présente une section transversale triangulaire et l'autre desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, présente une section transversale trapézoïdale.
  5. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait que, sur au moins l'une des parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) dudit outil, l'organe (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme est matérialisé par une extrémité libre de ladite partie (11, 11/1, 11/2, 11/3, 11/4 ; 12) de l'outil qui est munie d'une cavité intérieure, de préférence d'un cône intérieur (28).
  6. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait qu'au moins l'un des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme s'étend au niveau du côté pièce (31, 32, 35, 36) le long de l'axe de déplacement (14), parallèlement à la surface de séparation (39), sur la partie (18, 19, 20, 21, 22) de la pièce vers laquelle ledit côté pièce (31, 32, 35, 36) dudit organe (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme est tourné au cours du formage sous pression de la membrure de liaison (23) ; ou par le fait qu'au moins l'un desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme s'étend au niveau du côté pièce (31, 32, 35, 36) le long dudit axe de déplacement (14), en décrivant un angle par rapport à ladite surface de séparation (39), sur la partie (18, 19, 20, 21, 22) de ladite pièce vers laquelle ledit côté pièce (31, 32, 35, 36) dudit organe (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme est tourné au cours du formage sous pression de ladite membrure de liaison (23).
  7. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait que l'un des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme s'étend au niveau du côté pièce (31, 32, 35, 36), le long de l'axe de déplacement (14), parallèlement à la surface de séparation (39) et l'autre desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, s'étend au niveau du côté pièce (31, 32, 35, 36) le long dudit axe de déplacement (14), en décrivant un angle par rapport à ladite surface de séparation (39), sur la partie (18, 19, 20, 21, 22) de la pièce vers laquelle les côtés pièce (31, 32, 35, 36) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sont tournés au cours du formage sous pression de ladite membrure de liaison (23).
  8. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait que chacun des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme est muni de tronçons qui sont décalés les uns des autres et au moyen desquels, au cours du formage sous pression, la membrure de liaison (23) peut être mise en forme, sous pression, en plusieurs zones décalées les unes des autres le long de ladite membrure de liaison (23),
    • sachant qu'un tronçon respectif de l'un des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme et un tronçon respectif de l'autre desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, sont mutuellement associés et forment, de la sorte, des paires de tronçons d'organes,
    • sachant que lesdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sont respectivement pourvus d'un côté pièce (31, 32, 35, 36) et d'un côté membrure (33, 34, 37, 38) au niveau des tronçons des paires de tronçons d'organes, et que, lors du formage sous pression de la membrure de liaison (23), les côtés pièce (31, 32, 35, 36) des tronçons d'une paire de tronçons d'organes sont tournés vers une seule et même partie (18, 19, 20, 21, 22) de la pièce, et les côtés membrure (33, 34, 37, 38) des tronçons d'une paire de tronçons d'organes pointent à l'opposé de cette partie (18, 19, 20, 21, 22) de ladite pièce,
    et
    • sachant que les côtés pièce (31, 32, 35, 36) des tronçons de différentes paires de tronçons d'organes sont tournés vers différentes parties (18, 19, 20, 21, 22) de la pièce, et que les côtés membrure (33, 34, 37, 38) des tronçons de différentes paires de tronçons d'organes pointent à l'opposé de différentes parties (18, 19, 20, 21, 22) de ladite pièce.
  9. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait que les organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme s'étendent notamment sous une forme arquée dans une direction périphérique, autour de l'axe de déplacement (14), de préférence le long d'un arc de cercle.
  10. Outil de mise en forme selon la revendication 9, caractérisé par le fait qu'au moins l'un des organes (24, 24/1, 24/4 ; 25) de mise en forme présente une réalisation sans fin dans la direction périphérique.
  11. Outil de mise en forme selon l'une des revendications précédentes, caractérisé par le fait qu'au moins l'une (11/4 ; 12) des parties dudit outil est dotée d'une protubérance (47, 48) qui s'étend le long de l'axe de déplacement (14), en direction de l'autre partie considérée (11/4 ; 12) dudit outil ; et par le fait que les deux parties (11/4 ; 12) dudit outil, mues vers l'emplacement de fin de course, sont en appui l'une contre l'autre par l'intermédiaire de ladite protubérance (47, 48), le long dudit axe de déplacement (14), avec contournement de la membrure de liaison (23).
  12. Machine-outil équipée d'un outil (13, 13/1, 13/2, 13/3, 13/4) de mise en forme dévolu au formage sous pression d'une membrure de liaison (23) attenante à des parties (18, 19, 20, 21, 22) d'une pièce, par ses extrémités, et reliant les unes aux autres lesdites parties (18, 19, 20, 21, 22) de ladite pièce qui se présentent comme des produits d'un usinage séparatif d'une pièce du type plaque, d'une tôle (15) en particulier, et sont respectivement munies d'une surface de séparation (39) dans la direction transversale de laquelle ladite membrure de liaison (23) s'étend,
    caractérisée par le fait que
    l'outil de mise en forme (13, 13/1, 13/2, 13/3, 13/4) selon l'une des revendications 1 à 11 est prévu en tant qu'outil de mise en forme.
  13. Machine-outil selon la revendication 12, caractérisée par le fait que l'outil de mise en forme (13/4) selon la revendication 11 est prévu en tant qu'outil de mise en forme ; et par le fait que ledit outil (13/4) de mise en forme comporte, pour les parties (11/4; 12) de l'outil, un entraînement en translation équipé d'un dispositif (49) de commande de courses qui comprend, pour sa part, un dispositif (50) mesureur de forces, un dispositif d'évaluation (51) connecté audit dispositif (50) mesureur de forces, ainsi qu'un dispositif d'actionnement (52) connecté audit dispositif d'évaluation (51) dudit dispositif (49) de commande de courses, et audit entraînement en translation,
    • sachant que le dispositif (50) mesureur de forces du dispositif (49) de commande de courses permet de mesurer, lors de la course d'usinage des parties (11/4 ; 12) de l'outil (13/4) de mise en forme, la valeur de la force d'appui avec laquelle lesdites parties (11/4 ; 12) de l'outil sont en appui l'une contre l'autre, par l'intermédiaire de la protubérance (47, 48) s'étendant le long de l'axe de déplacement (14),
    • sachant que le dispositif d'évaluation (51) dudit dispositif (49) de commande de courses permet de comparer ladite valeur de la force d'appui, mesurée au moyen dudit dispositif (50) mesureur de forces, à une valeur limite de ladite force d'appui affectée à l'emplacement de fin de course desdites parties (11/4 ; 12) de l'outil, et
    • sachant que ledit dispositif d'évaluation (51) dudit dispositif (49) de commande de courses permet d'engendrer, à l'instant auquel ladite valeur limite de la force d'appui est atteinte ou dépassée, un signal de commutation qui est destiné au dispositif d'actionnement (52) dudit dispositif (49) de commande de courses, et sur la base duquel ledit dispositif d'actionnement (52) actionne ledit entraînement en translation dudit outil (13/4) de mise en forme dans le sens d'une cessation de la course d'usinage.
  14. Procédé de formage sous pression d'une membrure de liaison (23) attenante à des parties (18, 19, 20, 21, 22) d'une pièce, par ses extrémités, et reliant les unes aux autres lesdites parties (18, 19, 20, 21, 22) de la pièce qui se présentent comme des produits d'un usinage séparatif d'une pièce du type plaque, d'une tôle (15) en particulier, et sont respectivement munies d'une surface de séparation (39) dans la direction transversale de laquelle ladite membrure de liaison (23) s'étend,
    • sachant que deux parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) d'un outil (13, 13/1, 13/2, 13/3, 13/4) de mise en forme sont affectées à des côtés mutuellement opposés de la membrure de liaison (23), au niveau d'au moins une extrémité de ladite membrure de liaison (23), et sont mues, l'une par rapport à l'autre, le long d'un axe de déplacement (14) qui s'étend dans la direction transversale de ladite membrure de liaison (23),
    • sachant que ladite membrure de liaison (23) est sollicitée, au niveau de ladite extrémité impliquée au minimum, par des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme des parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) de l'outil, dont lesdites parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) de l'outil sont équipées sur des côtés pointant l'un vers l'autre le long de l'axe de déplacement (14), qui sont orientés les uns en direction des autres par des faces extrêmes (26, 27), à des extrémités libres, le long dudit axe de déplacement (14), et dont chacun est pourvu d'un côté pièce (31, 32, 35, 36) et d'un côté membrure (33, 34, 37, 38),
    • sachant que les parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) de l'outil sont orientées, par rapport à la membrure de liaison (23), de telle manière que le côté pièce (31, 32, 35, 36) des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme soit tourné vers une seule et même partie (18, 19, 20, 21, 22) de la pièce, et que le côté membrure (33, 34, 37, 38) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme pointe à l'opposé de cette partie (18, 19, 20, 21, 22) de ladite pièce, et
    • sachant que les parties (11, 11/1, 11/2, 11/3, 11/4 ; 12) de l'outil sont mues en direction l'une de l'autre le long de l'axe de déplacement (14), en accomplissant une course d'usinage, vers un emplacement de fin de course auquel les faces extrêmes (26, 27) des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme sont mutuellement espacées, le long dudit axe de déplacement (14), d'une distance inférieure à l'étendue de la membrure de liaison (23) devant être mise en forme le long dudit axe de déplacement (14),
    caractérisé par le fait que
    ledit procédé est mis en œuvre au moyen de l'outil de mise en forme (13, 13/1, 13/2, 13/3, 13/4) selon l'une des revendications 1 à 11, et/ou au moyen de la machine-outil (1) conforme à la revendication 12 ou à la revendication 13, sachant qu'au niveau des côtés de la membrure de liaison (23) pointant l'un vers l'autre, du matériau de ladite membrure de liaison (23) est plastifié au moyen des organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme de l'outil (13, 13/1, 13/2, 13/3, 13/4) de mise en forme, et du matériau plastifié de ladite membrure de liaison (23) est refoulé du côté pièce (31, 32, 35, 36) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, au niveau du côté membrure (33, 34, 37, 38) desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme, par les surfaces (40, 41, 42, 43) de mise en forme desdits organes (24, 24/1, 24/2, 24/3, 24/4 ; 25) de mise en forme.
  15. Procédé dévolu à l'usinage séparatif de pièces du type plaque, notamment à l'usinage séparatif de tôles (15), deux parties (18, 19, 20, 21, 22) d'une pièce étant alors séparées l'une de l'autre,
    • en ce sens que les deux parties (18, 19, 20, 21, 22) de la pièce sont, dans un premier temps, incomplètement séparées l'une de l'autre en engendrant une surface de séparation (39) sur chacune desdites deux parties (18, 19, 20, 21, 22) de la pièce et en laissant subsister au moins une membrure de liaison (23) qui est attenante auxdites parties (18, 19, 20, 21, 22) de la pièce, par ses extrémités, relie l'une à l'autre lesdites parties (18, 19, 20, 21, 22) de ladite pièce et s'étend dans la direction transversale des surfaces de séparation (39),
    • en ce sens que la membrure de liaison (23) est mise en forme sous pression à l'issue de la séparation incomplète des parties (18, 19, 20, 21, 22) de la pièce, et
    • en ce sens que, ensuite, les deux parties (18, 19, 20, 21, 22) de la pièce sont complètement séparées l'une de l'autre par dissociation de la liaison instaurée par la membrure de liaison (23) mise en forme,
    caractérisé par le fait que
    la membrure de liaison (23) est mise en forme sous pression, à l'issue de la séparation incomplète des parties (18, 19, 20, 21, 22) de la pièce, suivant le procédé conforme à la revendication 14.
  16. Procédé selon la revendication 15, caractérisé par le fait qu'une pièce du type plaque, une tôle (15) en particulier, en matériau élastiquement déformable est soumise à un usinage séparatif ; et par le fait que la membrure de liaison (23), à présence minimale, est produite en tant qu'articulation à corps solide et est douée de l'élasticité d'un ressort dans la direction transversale des surfaces de séparation (39) des parties (18, 19, 20, 21, 22) de la pièce qui sont reliées mutuellement par ladite membrure de liaison (23).
  17. Procédé dévolu à l'usinage de pièces du type plaque, notamment à l'usinage de tôles (15), la pièce étant soumise à un usinage séparatif,
    caractérisé par le fait que
    la pièce est soumise à un usinage séparatif suivant le procédé conforme à la revendication 15 ou à la revendication 16 ; et par le fait qu'à l'issue de la séparation incomplète des parties (18, 19, 20, 21, 22) de la pièce, et avant ou après le formage sous pression de la membrure de liaison (23) à présence minimale, reliant mutuellement lesdites parties (18, 19, 20, 21, 22) de la pièce, et préalablement à la séparation complète desdites parties (18, 19, 20, 21, 22) de la pièce, au moins l'une desdites parties (18, 19, 20, 21, 22) de ladite pièce incomplètement séparées les unes des autres est soumise à un usinage additionnel, de préférence à un usinage additionnel de chants.
EP15165673.3A 2015-04-29 2015-04-29 Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques Active EP3088096B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15165673.3A EP3088096B1 (fr) 2015-04-29 2015-04-29 Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques
JP2016090884A JP6738191B2 (ja) 2015-04-29 2016-04-28 プレート状のワークのワーク部分の間における結合ウェブを押圧変形する装置および方法
CN201610280382.7A CN106077278B (zh) 2015-04-29 2016-04-29 将板形工件的工件部分间的连接筋压力成形的装置和方法
US15/142,666 US10058907B2 (en) 2015-04-29 2016-04-29 Devices and methods for pressure forming connecting webs between workpiece parts of a plate-like workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15165673.3A EP3088096B1 (fr) 2015-04-29 2015-04-29 Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques

Publications (2)

Publication Number Publication Date
EP3088096A1 EP3088096A1 (fr) 2016-11-02
EP3088096B1 true EP3088096B1 (fr) 2021-07-07

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EP15165673.3A Active EP3088096B1 (fr) 2015-04-29 2015-04-29 Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques

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Country Link
US (1) US10058907B2 (fr)
EP (1) EP3088096B1 (fr)
JP (1) JP6738191B2 (fr)
CN (1) CN106077278B (fr)

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Publication number Priority date Publication date Assignee Title
CN112313030B (zh) * 2018-04-13 2023-06-23 Ipg光子公司 片材的激光辅助加工
DE102022127687A1 (de) 2022-10-20 2024-04-25 TRUMPF Werkzeugmaschinen SE + Co. KG Verfahren zum Erzeugen eines dickenreduzierten Verbindungsstegs beim Schneiden eines Werkstückteils aus einem plattenartigen Werkstück sowie zugehöriges Steuerungsprogrammprodukt

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JPS57146428A (en) * 1981-03-06 1982-09-09 Taiho Kogyo Co Ltd Piercing method for plate
JP2661287B2 (ja) * 1989-01-19 1997-10-08 トヨタ自動車株式会社 だれ・かえり防止打抜き加工法
JPH0428439A (ja) * 1990-05-22 1992-01-31 Matsushita Electric Ind Co Ltd 軸受プレートの製造方法
JPH06142784A (ja) * 1992-11-10 1994-05-24 Komatsu Ltd パンチプレス加工におけるジョイント加工方法
US5655401A (en) 1995-11-13 1997-08-12 Interbold Tabbing tool and method
FR2751570B1 (fr) 1996-07-25 1998-09-04 Lorraine Laminage Procede de decoupage d'une piece dans un flan de tole
JP3782853B2 (ja) * 1996-08-22 2006-06-07 日清紡績株式会社 パンチプレス装置における多数穿孔金属板の製造方法
JP3339363B2 (ja) * 1996-11-25 2002-10-28 トヨタ車体株式会社 半抜き成形方法およびこれに使用する冷間鍛造型
JPH11300428A (ja) * 1998-04-22 1999-11-02 Amada Co Ltd パンチプレスの加工方法及びその装置
US8166854B2 (en) 2004-04-09 2012-05-01 Toyota Boshoku Kabushiki Kaisha Shearing device
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JP2007000901A (ja) * 2005-06-24 2007-01-11 Murata Mach Ltd パンチプレスのバリ取りツール
JP2013059777A (ja) * 2011-09-12 2013-04-04 Toyota Motor Corp ホットプレス加工方法およびホットプレス加工装置
DE102012011767A1 (de) * 2012-05-10 2013-11-14 Technische Universität München Zerteilen eines Werkstücks
CN204159719U (zh) 2014-07-26 2015-02-18 保定苏博汽车零件制造有限公司 一种半剪模

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Also Published As

Publication number Publication date
US10058907B2 (en) 2018-08-28
JP2017001096A (ja) 2017-01-05
CN106077278A (zh) 2016-11-09
EP3088096A1 (fr) 2016-11-02
CN106077278B (zh) 2019-04-30
JP6738191B2 (ja) 2020-08-12
US20160318088A1 (en) 2016-11-03

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