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
  • B21D19/00—Flanging or other edge treatment, e.g. of tubes
  • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
  • B21D19/082—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles
  • B21D19/084—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles with linear cams, e.g. aerial cams
• • 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
  • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Definitions

• the invention relates to the forming of a workpiece, preferably of a motor vehicle body, by stamping. More particularly, the invention relates to forming a piece of elongated and narrow shape, with the return of an edge.
• a motor vehicle body side generally includes an elongated upper portion along its connection to the roof horn and the windshield window of the vehicle.
• the upper portion is generally of a small size section relative to the total height of the body side.
• the upper portion may be of a very narrow section along the bay window, such a section to increase the brightness inside the vehicle.
• the patent document FR 3 002 746 A1 discloses a tool for stamping an elongated stamped portion, more precisely one side of a motor vehicle body.
• the tool comprises a matrix forming a receiving surface of the elongate portion of the stamping, a punch mounted on a slider being adapted to deform the stamped undercut against the receiving surface.
• a lower frame supports the die, an upper frame supports the slider.
• the tooling further includes a presser mounted on the upper frame for pressing an inner portion of the edge of the press.
• the lower and upper frames are configured to cooperate by bringing together so as to achieve the pressing and deformation of the stamping.
• the matrix is slidable in the first frame by spacing the upper frame so as to extract the stamped deformed undercut the die.
• the object of the invention is to propose a solution that overcomes at least one of the drawbacks of the state of the art, in particular of the state of the art mentioned above.
• the invention aims to propose a solution allowing the setting shape of an elongated pressed edge that is economical and satisfactory from a stamping point of view.
• the subject of the invention is an embossing press tooling tool, in particular a motor vehicle bodywork, comprising: a die with a stamping receiving surface for cooperating with a main presser; and a slider with a punch adapted to deform an edge of the press against the receiving surface of the die; remarkable in that the slide comprises an auxiliary presser able to press against the receiving surface of the matrix a distal portion of the edge of the stamping before deforming said edge.
• distal portion of the edge of the stamping means a portion of the edge of the stamped which is distal or remote from the center of the stamping. This is the portion of the edge extending along the free end of said edge.
• the auxiliary presser is mounted to move in translation on the slide, preferably in a direction parallel to the sliding direction of the slide.
• the slide comprises elastic means, such as one or more springs, exerting an elastic force on the auxiliary pressure.
• This elastic force is directed towards the receiving surface of the stamping on the die.
• the auxiliary presser comprises a pressing surface with an irregular profile, preferably a ribbed profile.
• the slide comprises a first sliding surface relative to the first frame and a second sliding surface relative to the second frame.
• the receiving surface is generally elongated, the section of said surface having a generally curved profile, preferably forming an undercut.
• the receiving surface portion cooperating with the slide comprises a first concave profile cooperating with the punch and a second generally straight profile cooperating with the auxiliary presser.
• the receiving surface is formed by two adjacent matrix elements movable in translation relative to one another.
• the tooling further comprises a first, preferably lower, frame supporting the die; a second frame, preferably higher, supporting the slide adapted to cooperate with the matrix by bringing the first and second frames together; the slide being slidable relative to the matrix in a direction inclined relative to the direction of approach, an angle of between 20 ° and 80 ° to deform the edge of the stamping.
• the tooling further comprises a main presser mounted spring-mounted on the second frame, said main presser being able to press the edge of the press against a central and main portion of the receiving surface of the matrix.
• the first frame comprises moving cams by bringing the second frame closer together, the die being supported by said cams.
• the first frame comprises a plug adapted to slide longitudinally in said frame, said plug comprising a first row and a second row of cams adapted to cooperate with the first and second elements of the matrix, respectively, to ensure the mobility of said elements, said plug being slidable by bringing the second frame towards said frame.
• the cams are configured so that the movements of the two elements of the matrix are successive.
• the subject of the invention is also a method of forming a stamped article, in particular of a motor vehicle body, said method comprising the following steps:
• the receiving surface is formed by two adjacent matrix elements movable in translation relative to one another, the method comprising a step c) sliding towards the lower frame of the one then the other of the two elements for the extraction of the die from the edge of the stamped deformation in step b).
• the stamping forming process is followed by a step of cutting the distal portion of the edge of the stamping.
• the measures of the invention are interesting in that the elongated edge of the stamping is shaped over its entire length in a single stamping pass, which is economical. Indeed, the elongate stamping is tightly adapted to prevent quality defects. In particular, the clamping of the distal portion of the edge of the stamping allows to achieve the necessary tension to form without visible deformation of said portion.
• FIG. 1 is a view of a motor vehicle body side comprising an elongated edge
• FIG. 2 is a top view of a press stamping tool according to the invention.
• FIG. 3 is a sectional view of the stamping press tooling of FIG. 2 at the step of receiving the elongate edge of the stamping device of FIG. 1;
• FIG. 4 is a sectional view of the stamping press tooling of FIG. 2 at the step of deforming the elongate edge of the stamping device of FIG. 1;
• Figure 1 is a view of a body side 2 of a motor vehicle.
• the body side 2 comprises passages 4 for receiving doors. Above these doorways, the body side 2 comprises an elongated upper edge 6 shaped on a rear portion 8 intended to make the link with the roof of the vehicle and on a front portion 10 intended to make the link with the windshield window of the vehicle.
• Figure 2 is a top view of a stamping press press tooling 12 according to the invention. More specifically, we can see a first frame 14 of the tool 12, in this case the lower frame.
• the lower frame 14 supports a die 16 which can be seen a receiving face 18 of the stamping for its shaping. It is recognized by the shape of the receiving face 18 illustrated here the shape of the body side presented in relation to the previous figure; in particular, the shape of the elongated upper edge of the body side can be seen.
• the receiving face 18 comprises receiving surfaces 20 towards the rear and 20 'towards the front of the elongate edge. Rear and front is heard along the longitudinal axis of the vehicle. These receiving surfaces 20 and 20 'may comprise undercut portions.
• Tooling 12 is intended to implement a method of forming the elongated edge of the stamping.
• the method comprises the step a) of receiving the elongated edge of the stamping in the stamping press tooling 12, then it comprises the step b) deformation of the edge of the stamping.
• the receiving surface 20 ' consists of two adjacent matrix members 22 and 22'. These two adjacent elements 22 and 22 'are movable in translation relative to each other for the extraction of the stamping of the die 16 after forming the stamping.
• the receiving surface 20 'of the die 16 formed by the two members 22 and 22' extends in this case only over a portion of the length of the die in the longitudinal direction.
• the receiving surface 20 'further extends in a mean direction inclined with respect to the receiving surface 20 outside the two elements 22 and 22'.
• the average inclination in question corresponds to that of the inclined front edge of the stamped intended to receive the window windshield.
• the particular extent and direction of the receiving surface 20 ' are made in connection with the particular shaping of the stamping, they however do not limit the invention.
• Figures 3 and 4 are sectional views III-III of the stamping press tooling 12 according to the invention. The cut is made at the front of the tool 12 at the receiving surface 20 'of the die 16 comprising the two adjacent elements 22 and 22'.
• FIG. 3 is a sectional view III-III of press tooling 12 stamping, including motor vehicle body.
• the tool 12 is shown in step a) of the method according to the invention, a step which comprises receiving the elongated edge of the stamping.
• the lower frame 14 comprising the matrix 16 in its portion comprising the two adjacent elements 22 and 22 'movable relative to each other and forming the receiving surface 20' of the edge of the stamping.
• the receiving surface 20 ' is elongate, the section of said surface having a generally curved profile, it presents in this case a profile forming an undercut 28. It can be seen, on the portion of the enlarged image to the right of the main image, the slope 28 of the receiving surface 20 'forming the undercut.
• the enlarged image portion does not include the stamp.
• the tooling 12 comprises a second frame 30, in this case an upper frame, supporting the slide 26 presented in relation with FIG.
• the upper frame 30 further comprises a main presser 32 mounted spring-mounted on the upper frame 30. By bringing the lower and upper frames 14 and 30 closer together, the main presser 32 is able to press the edge 6 of the press 2 against a central and main portion 34 of the receiving surface 20 'of the matrix 16.
• the slider 26 is also able to cooperate with the matrix 16.
• the slider 16 comprises a punch 36 and an auxiliary presser 38; the punch 36 is able to deform the stamping against a portion 40 of the receiving surface 20 'and the auxiliary presser 38 is able to press a distal portion of the edge 6 of the press against a corresponding portion 42 of the receiving surface 20 'of the die 16 before deforming said edge.
• distal portion of the edge 6 of the stamp 2 is meant a portion of the edge of the stamping which is distal or remote from the center (not visible) of the stamp 2. This is the portion of the edge s' extending along the free end of the elongated edge 6.
• the portion 40 of the receiving surface 20 'with which the punch 36 cooperates forms a first concave profile; the portion 42 of the surface of receiving 20 'with which cooperates the auxiliary presser 38 forms a second generally straight profile.
• the auxiliary presser 38 is mounted to move in translation on the slider 26, preferably in a direction parallel to the direction of sliding of the slider 26.
• the slider comprises elastic means, such as one or more springs 44, exerting an elastic force on the auxiliary presser 38. This elastic force is directed towards the receiving surface 20 'of the stamping on the die.
• the auxiliary presser 38 may comprise a pressing surface 39 with an irregular profile, preferably a ribbed profile. A corresponding rib 46 can be seen on the portion 42 of the receiving surface 20 '.
• the slider 26 is slidable with respect to the die 16 in an inclined direction, with respect to the direction of approach between the upper and lower frames, of an angle of between 20 ° and 80 ° in the life of deforming the edge 6 of the stamped.
• the direction of approach between the frames is illustrated by an arrow on the image.
• the slider comprises a first sliding surface 48 with respect to the lower frame 14 and a second sliding surface 50 with respect to the upper frame 30.
• the presser 32, the presser auxiliary 38 and the punch 36 are also intended, in the same approaching movement of the lower and upper frames 14 and 30, to press the edge 6 of the stamping 2 against the receiving surface referenced "20" in connection with Figure 2 that of the die 16 outside the receiving surface 20 'formed by the two elements 22 and 22'.
• FIG. 4 is a view in the same plane of section as that seen in relation with FIG. 3. It can be seen in FIG. 4 the pressing press tooling 12 in step b) of the method. according to the invention, a step which comprises the deformation of the elongated edge 6 of the stamping 2 and the pressing by means of the auxiliary presser 38 of the edge of the stamping before and / or during its deformation.
• a step which comprises the deformation of the elongated edge 6 of the stamping 2 and the pressing by means of the auxiliary presser 38 of the edge of the stamping before and / or during its deformation.
• the lower frame 14 comprises cams 56 and 56 'which are movable by bringing the upper frame 30 towards the frame lower 14, the matrix 16 being supported by said cams 56 and 56 '.
• the first frame 14 comprises a plug 58 adapted to slide longitudinally in said frame 14; the plug 58 comprises the two rows of cams 56 and 56 'able to cooperate with the first and second elements 22 and 22' of the matrix 16, respectively, in order to ensure the mobility of said elements.
• the first element 22 of the matrix 16 comprises a first sliding surface 60 with the lower frame 14 so as to ensure a first mobility of the first element 22 relative to said frame.
• the first element 22 further comprises a second sliding surface 62 with the second element 22 'so as to ensure a second mobility of the second element 22' relative to the first element 22.
• the plug 58 is sliding longitudinally by bringing the upper frame 30 closer to the lower frame 14; the mechanism generating this sliding is however not represented.
• the cams 56 and 56 ' are configured so that the movements of the two elements 22 and 22' of the matrix 16 are successive.
• the method according to the invention may also include extracting the stamping of the matrix made in a step c) (not shown) of sliding towards the lower frame 14 of the second element 22 'of the two elements and then sliding towards said frame of the first element 22 of the two elements.
• the method according to the invention may also comprise a step of ) (not shown) of cutting the distal portion 52 of the edge of the stamping, this cutting of the distal portion being made on another tool.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=52824404

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (6)

• 2015
  • 2015-01-06 FR FR1550070A patent/FR3031322B1/fr not_active Expired - Fee Related
  • 2015-12-09 EP EP15817981.2A patent/EP3242757B1/de active Active
  • 2015-12-09 CN CN201580072069.8A patent/CN107107143B/zh active Active
  • 2015-12-09 WO PCT/FR2015/053401 patent/WO2016110621A1/fr active Application Filing

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