EP3130412B1 - Outillage d'emboutissage avec guidage sans serrage - Google Patents

Outillage d'emboutissage avec guidage sans serrage Download PDF

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Publication number
EP3130412B1
EP3130412B1 EP16178255.2A EP16178255A EP3130412B1 EP 3130412 B1 EP3130412 B1 EP 3130412B1 EP 16178255 A EP16178255 A EP 16178255A EP 3130412 B1 EP3130412 B1 EP 3130412B1
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EP
European Patent Office
Prior art keywords
matrix
sub
less
zone
punch
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
EP16178255.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3130412A1 (fr
Inventor
Ludovic VALLON
David PICHON
Christophe TRICOT
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.)
PSA Automobiles SA
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PSA Automobiles SA
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Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3130412A1 publication Critical patent/EP3130412A1/fr
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Publication of EP3130412B1 publication Critical patent/EP3130412B1/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor

Definitions

  • the invention relates to the field of forming a sheet blank or stamped blank and relates to a stamping tool according to the preamble of claim 1.
  • stamping tool is for example disclosed in the document EP-A-2859965 .
  • the figure 1 is a generic representation of a stamping tool 2 of a sheet metal blank 4, the tool comprising a die 6 with a hollow central portion 8 and a peripheral portion 10, a punch 12 able to cooperate with the hollow portion 8 of the die with a view to stamping the sheet blank.
  • the tool also comprises a blank holder 14 disposed laterally to the punch and which cooperates with the peripheral portion of the die with a view to forming a retaining zone 16 for the sheet blank. It is known to manage the retaining of the sheet blank by working on the clamping of the sheet blank at the level of the blank holder, for example by the shape of the peripheral cutout of the sheet blank so as to present a retaining surface of the blank. of sheet metal that is adequate.
  • the retaining surface of the sheet metal blank It is in fact at the level of the retaining surface of the sheet metal blank that the latter resists by friction its swallowing in the shaping zone formed by the punch cooperating with the hollow portion of the die.
  • the adequate retaining surface of the sheet metal blank allows quality stamping, for example it makes it possible to avoid reductions in thickness or tears during the stamping of the sheet metal blank. An operation of cutting the sheet blank preceding the stamping operation is however expensive.
  • the patent document WO 2012/045292 A1 discloses a stamping tool comprising a retaining zone formed by a die with a portion at the periphery, a punch and a blank holder cooperating with the portion at the periphery of the die as presented in relation to the figure 1 .
  • the tooling comprises a clamping zone between the blank holder and the peripheral portion of the die.
  • the latter further comprises a movable element having curvatures and able to cooperate with the blank holder to form a zone for pre-stretching the sheet blank at the level of the mobile element and before the final shaping of the blank. of sheet metal.
  • This teaching is limited to the pre-stretching of the sheet blank before forming, it does not help in the management of the swallowing of the blank during stamping.
  • the object of the invention is to propose a solution to the disadvantages of the state of the art, in particular of the aforementioned state of the art. More particularly, the invention has for objective of proposing a solution making it possible to facilitate the shaping of a sheet metal blank for economical manufacture.
  • the invention relates to a tool for stamping a sheet blank, comprising a die with a hollow central portion and a peripheral portion; a punch capable of cooperating with the hollow portion of the die with a view to stamping the sheet blank; a blank holder disposed laterally to the punch and cooperating with the peripheral portion of the die in order to form a retaining zone for the sheet blank; remarkable in that the retaining area of the sheet metal blank comprises a sub-area for clamping said sheet blank and at least one sub-area for non-clamping guidance of said blank arranged outside the sub-area for clamping relative to with the hollow portion and with the punch.
  • the sub-clamping zone is adjacent to the hollow portion and to the punch, it extends over the entire periphery of the hollow portion and of the punch.
  • the or each of the guide sub-areas extending along the clamping sub-area and is adjacent to said sub-area.
  • the or each of the guide sub-zones comprises an outer part of generally regular height or of constant height and an inner part adjacent to the clamping sub-area, said inner part being of decreasing height as it approaches said sub-area.
  • the constant height at the level of the outer part of the or each of the guide sub-zones is equal to the thickness of the sheet blank plus a clearance between 0.2mm and 1mm, preferably a clearance between 0 , 3mm and 0.7mm. That is, the constant height "H" at the outer part of the guide sub-area is equal to the distance between the die and the blank holder at the clamping sub-area when the blank holder clamps the sheet metal blank on the die, plus a clearance of between 0.2mm and 1mm, preferably a clearance of between 0.3mm and 0.7mm.
  • the interior part of the or each of the guide sub-zones comprises surfaces facing the die and the blank holder inclined at an angle of less than 3 °, preferably less than 1. , 5 °, more preferably still less than 1 °.
  • the or each of the guide sub-zones is delimited by a flat surface on the blank holder or on the die, the angle between the surfaces facing the die and of the blank holder being produced by an angulated surface on the die or on the blank holder, respectively.
  • the or each of the non-clamping guide sub-zones extends along a mean plane which is oriented in the extension of the mean plane along which the sub-zone extends. corresponding clamping or along a mean plane which forms with said corresponding mean plane an angle of less than 15 °, preferably less than 10 °, more preferably still less than 5 °.
  • the exterior part of the or each of the guide sub-zones covers more than 100%, preferably more than 150%, more preferably still more than 200% of the corresponding interior part.
  • the non-clamping guide sub-zone is single and extends over the entire periphery of the hollow portion of the die and of the punch or is single and extends over less than 70% of said periphery, preferably over less than 60% of said periphery, more preferably still over less than 40% of said periphery.
  • the tool comprises at least two guide sub-zones without clamping symmetrical with respect to an axis of symmetry of the hollow central portion of the die.
  • the tool is generally rectangular in shape and comprises one or more guide sub-zones in one or more corners of the tool.
  • the stamping tooling facilitates the shaping of the sheet blank.
  • the retaining zone of the sheet metal blank comprises a sub-clamping zone and one or more sub-guide zones without Tightening.
  • the extent of the non-clamping guide sub-zone (s) makes it possible to manage the retention of the sheet blank, an operation of cutting the sheet blank preceding the stamping is thus avoided, which reduces the manufacturing cost of the stamped part.
  • the figure 1 is a sectional view of a stamping tool 2 of a sheet metal blank 4 according to the state of the art. Stamping tooling has been described in connection with the discussion of the state of the art.
  • the figures 2 and 3 illustrate a stamping tool according to the invention in a particular embodiment.
  • the figure 4 illustrates a stamping tool according to the invention and in a second embodiment by way of example.
  • the figure 5 illustrates a stamping tool according to the invention and in a third embodiment by way of example.
  • the reference numbers of the figure 1 are used in figures 2 to 5 for identical or corresponding elements, these numbers being however increased by 100 for the particular embodiment illustrated in figures 2 and 3 , of 200 for the second embodiment illustrated on figure 4 , and 300 for the third embodiment illustrated in figure 5 .
  • the figure 2 is a sectional view of a stamping tool 102 of a sheet blank 104 in accordance with the invention and in a particular embodiment.
  • the sheet metal blank shown is generally flat and of thickness "e".
  • the tooling is also suitable for shaping a stamping.
  • the tooling comprises a die 106, a punch 112 and a blank holder 114.
  • the die comprises a hollow central portion 108 and a peripheral portion 110.
  • the punch 112 is able to cooperate with the hollow portion of the die with a view to stamping the sheet metal blank.
  • the blank holder is disposed laterally to the punch and cooperates with the peripheral portion of the die in order to form a retaining zone 116 and 116 ′ of the sheet metal blank.
  • the retaining area comprises a sub-area 118 for clamping the sheet blank and one or more guide sub-areas 120 and 120 'without clamping the sheet blank. It can be seen that the sub-clamping zone 118 is adjacent to the hollow portion 108 of the die.
  • the guide sub-zone or zones 120 and 120 ′ are moreover adjacent to the clamping sub-zone 118. It should be noted that the clamping sub-zone 118 extends over the entire periphery of the hollow portion and of the punch.
  • the sheet blank 104 disposed between the die 106 which is located in the lower part of the tool can also see the punch 112 and the blank clamp 114 which are located in the upper part of the tool.
  • the die can be located in the upper part of the tool 102 and the punch in the lower part. It can be seen that the tooling is in the clamping position of the sheet metal blank 104 between the blank holder 114 and the die 106 at the level of the clamping sub-zone 118 of the peripheral portion 110 of the die 106.
  • the sheet metal blank 104 is released from the tooling at the level of the guide sub-zone 120 and 120 'of the peripheral portion of the die. It can also be observed on the peripheral portion of the die of the hollow portion that the guide sub zone 120 '(on the left in the image) extends along a mean plane "K" which is generally oriented in the extension of the mean plane along which extends the corresponding clamping sub-zone 118. It should be noted that the orientation of the guide sub-zone directly in the extension of the clamping sub-zone does not limit the invention.
  • the guide sub zone 120 (on the right on the image) can extend along a mean plane "J" which forms an angle " ⁇ " with the mean plane along which the corresponding clamping subzone 118 extends by less than 25 °.
  • the angle “ ⁇ ” may be less than 10 °, preferably less than 5 °.
  • the figure 3 is an enlarged sectional view of the tool 102 according to the invention illustrated with reference to the figure 2 and at the level of the retaining zone 116 of the sheet metal blank 104. From bottom to top in the image, it is possible to see the peripheral portion 110 of the die 106, the sheet metal blank 104, and the blank clamp 114 cooperating with the die for the tightening of the sheet metal blank. We can see from left to right (on the image) the hollow portion 108, the clamping sub-zone 118 at which the sheet blank is clamped between the die and the blank clamp and the guide sub-zone 120 at the level of which the sheet blank is clamped between the die and the blank holder. level at which the sheet metal blank 104 is not clamped between the die and the blank holder.
  • the guide sub-zone 120 may be of an average height between the blank holder and the die which is equal to less than 4 times the thickness of the sheet blank, preferably less than 3 times the thickness of the blank, more preferably still less than twice the thickness of the blank.
  • the guide sub-zone comprises an external part 122 which is of constant height "H” and an internal part 122 'adjacent to the clamping sub-zone 118 which is of height "H". decreasing as it approaches the clamping sub-zone.
  • the constant height "H" at the level of the outer part of the sub-guide zone is equal to the distance between the die and the blank holder at the level of the clamping sub-area when the blank holder clamps the sheet blank on the die, plus a clearance between 0.2mm and 1mm, preferably a clearance between 0.3mm and 0.7mm. That is to say that the constant height "H" at the level of the outer part of the guide sub zone is equal to the thickness of the sheet blank plus a clearance between 0.2mm and 1mm, when the blank holder tightens. the sheet metal blank on the die, preferably a clearance of between 0.3mm and 0.7mm.
  • the decreasing height "H '" at the level of the interior part 122' of the guide sub-zone can be achieved by an angle “ ⁇ " between the die and the blank holder of less than 5 °.
  • the angle “ ⁇ ” may be less than 3 °, preferably less than 1 °. It can be observed that the guide sub-zone 120 is delimited by a flat surface 124 on the die, the angle between the surfaces facing the die and allowing the decreasing height "H '" on the interior part. 122 'of the guide sub-zone 120 being produced by an angulated surface on the blank holder 114.
  • the architecture can be opposed in that the guide sub-zone can be delimited by a flat surface on the blank clamp and the angle between the facing surfaces is then achieved by an angulated surface on the die. It can be observed in this particular embodiment that the outer part 122 at constant height of the guide sub-zone covers more than 100%, preferably more than 150%, more preferably still more than 200% of the corresponding inner part 122 '. .
  • the figure 4 is a top view in transparency of a stamping tool 202 in a second embodiment by way of example.
  • the die of the tooling comprises in this case a peripheral portion 210 which is asymmetrical. The latter extends more on one side (at the bottom of the image) of the zone to be shaped than on the other side (at the top of the image) of the zone.
  • the guide sub-zone 220 of the tool is in this case a single guide sub-zone which extends around the periphery of the hollow portion and of the punch over less than 70% of said periphery.
  • the single guide sub-zone can extend over less than 60% of said periphery, more preferably still over less than 40%.
  • the sheet metal blank 204 can be a stamped scrap of any shape and it is possible, as illustrated here, to make a stamping from the scrap by locating the zone to be shaped along one side of the scrap, the guide sub-zone 220 then being located on the other side of the chute so as to reduce the clamping surface on the side in question.
  • the stamping tooling may comprise a single guide sub-zone which extends over the entire periphery of the hollow portion of the die and of the punch.
  • the figure 5 is a top view in transparency of a stamping tool 302 according to the invention and in a third embodiment by way of example of a stamped 304.
  • the die 306 of the tool comprises in this case a peripheral portion 310 which is symmetrical; an axis of symmetry "L" of said portion is shown in the image, the axis is also an axis of symmetry of the hollow portion and of the punch.
  • the shaping zone of the hollow portion 308 of the die and of the punch 312 can be seen in the center of the image, a shape which corresponds in this case to that of a motor vehicle hood.
  • the retaining zone 316 comprising the clamping sub-zone 318 of the tool on the periphery of the forming zone as well as two guide sub-zones 320 and 320 'outside the sub-zone. tightening relative to the hollow portion of the die and to the punch.
  • These two guide sub-zones are symmetrical with respect to the “L” axis of symmetry.
  • the tool 302 is in this case of generally rectangular shape and the guide sub-zones are located in 2 corners of the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP16178255.2A 2015-08-13 2016-07-06 Outillage d'emboutissage avec guidage sans serrage Active EP3130412B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1557718A FR3040010B1 (fr) 2015-08-13 2015-08-13 Outillage d’emboutissage avec guidage sans serrage

Publications (2)

Publication Number Publication Date
EP3130412A1 EP3130412A1 (fr) 2017-02-15
EP3130412B1 true EP3130412B1 (fr) 2021-04-07

Family

ID=54207585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16178255.2A Active EP3130412B1 (fr) 2015-08-13 2016-07-06 Outillage d'emboutissage avec guidage sans serrage

Country Status (4)

Country Link
EP (1) EP3130412B1 (zh)
CN (1) CN106424348B (zh)
ES (1) ES2868780T3 (zh)
FR (1) FR3040010B1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113878018B (zh) * 2021-08-27 2023-09-29 东风汽车集团股份有限公司 一种下模压边圈、拉延模具、使用方法及拉延工序件

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991203A1 (fr) * 2012-06-01 2013-12-06 Peugeot Citroen Automobiles Sa Presse d'emboutissage de pieces en tole dont le presseur comporte des elements en elastomere.
EP2859965A1 (en) * 2012-06-07 2015-04-15 Toyo Seikan Group Holdings, Ltd. Deep draw moulding method and moulding metal die therefor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576030A (en) * 1983-08-31 1986-03-18 Wallace Expanding Machines, Inc. Stretch form die
CN1180899C (zh) * 2002-10-17 2004-12-22 江苏大学 激光拼焊板成形中的焊缝移动控制方法
CN201279549Y (zh) * 2008-10-06 2009-07-29 广州普什精密模具有限公司 用于汽车座椅后座盆冲压件双浮动拉延的模具
CN201399534Y (zh) * 2009-05-03 2010-02-10 魏永杰 一种拉伸模具
DE102010048406A1 (de) * 2010-08-09 2012-02-09 Giw Gesellschaft Für Innovative Werkzeugsysteme Mbh Verfahren und Vorrichtung zum Ziehen von Blechen
DE102010049264A1 (de) * 2010-10-04 2012-04-05 Giw Gesellschaft Für Innovative Werkzeugsysteme Mbh Verfahren und Vorrichtung zum Ziehen von Blechen
FR2983747B1 (fr) * 2011-12-08 2014-01-24 Peugeot Citroen Automobiles Sa Dispositif de controle de la position de travail d'un serre-flan sur une presse d'emboutissage simple effet
JP6075304B2 (ja) * 2013-03-28 2017-02-08 株式会社豊田中央研究所 熱間プレス成形方法および熱間プレス成形装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991203A1 (fr) * 2012-06-01 2013-12-06 Peugeot Citroen Automobiles Sa Presse d'emboutissage de pieces en tole dont le presseur comporte des elements en elastomere.
EP2859965A1 (en) * 2012-06-07 2015-04-15 Toyo Seikan Group Holdings, Ltd. Deep draw moulding method and moulding metal die therefor

Also Published As

Publication number Publication date
CN106424348A (zh) 2017-02-22
EP3130412A1 (fr) 2017-02-15
FR3040010A1 (fr) 2017-02-17
ES2868780T3 (es) 2021-10-21
CN106424348B (zh) 2020-02-18
FR3040010B1 (fr) 2018-02-23

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