EP3507037A1 - Press and method for the simultaneous shaping of more than one thin product - Google Patents

Press and method for the simultaneous shaping of more than one thin product

Info

Publication number
EP3507037A1
EP3507037A1 EP17847090.2A EP17847090A EP3507037A1 EP 3507037 A1 EP3507037 A1 EP 3507037A1 EP 17847090 A EP17847090 A EP 17847090A EP 3507037 A1 EP3507037 A1 EP 3507037A1
Authority
EP
European Patent Office
Prior art keywords
shaping
press
tools
elements
individual
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.)
Pending
Application number
EP17847090.2A
Other languages
German (de)
French (fr)
Other versions
EP3507037A4 (en
Inventor
Jan Larsson
Andreas Norman
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.)
Conex Die Solutions AB
Original Assignee
Concurrent Eng Experts Conex AB
Concurrent Engineering Experts Conex AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Concurrent Eng Experts Conex AB, Concurrent Engineering Experts Conex AB filed Critical Concurrent Eng Experts Conex AB
Publication of EP3507037A1 publication Critical patent/EP3507037A1/en
Publication of EP3507037A4 publication Critical patent/EP3507037A4/en
Pending legal-status Critical Current

Links

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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/02—Die-cushions
    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/003—Simultaneous forming, e.g. making more than one part per stroke
    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • 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
    • 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
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • 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

Definitions

  • This invention relates to a press for the shaping of thin sheets to thin products, comprising two cooperating tools and means for pressing one of the tools against the other for the simultaneous shaping of more than one thin product between the tools.
  • the invention relates also to a method for the simultaneous shaping and press-hardening of more than one product in a press.
  • Press-hardened beams for example bumper beams and B-pillars for the automotive industry are usually manufactured in presses of this kind.
  • the tools are cooled and the hot-formed products are hardened with the tools as a fixture after the shaping.
  • Simultaneous shaping in ordinary hot forming and cold forming is also common.
  • One of the tools has, for each thin product, an individual forming element which directly or indirectly rests on a pre-stressed spring element for defining the maximum press force for the thin product when the tools are forced together.
  • Figure 1 shows in cross section a press in its open position.
  • Figure 2 shows parts of the press in figure 1 in its closed position.
  • Figure 3 shows a cross section of a modified portion of figure 1 in closed position.
  • Figure 4 corresponds to figure 3, but showing the press in its closed position.
  • Figure 5 shows a pre-stressed spring element
  • Figures 1 and 2 show a press having a frame 11 with a fixed tool and a movable tool 13.
  • the upper tool 13 is the movable one and it is controlled by a slide 14, which is hydraulically driven.
  • the lower tool has a number of cavities 15,16,17,18, for example four as shown, and in the cavities are individual tools, shaping elements 19,20,21 ,22, slidable and they rest on a number of pre-stressed elastic elements 23.
  • Such a pre-stressed element is shown as figure 5 and may, as shown, consist of a stack of spring washers 24 compressed between end plates 25. The end plates are held together by a plurality of screws 26.
  • the pre-stress causes the spring force not to vary so much with the compression, thus equalizing tolerances.
  • Figure 1 shows the press open, i.e. the upper tool 13 is lifted and four flat thin blanks 24 are inserted to rest on the four individual tools 19-22 of the lower tool.
  • Figure 2 shows the press in its closed position, that is, the upper tool 13, the stamp, has punched down and fully formed the blanks 24 between the upper tool 13 and the individual tools 19-22 of the lower tool 12 just before or when the upper tool bottomed on the lower one by means of cooperating bottoming elements 27,28.
  • the pre-stressed elements 23 provide a defined reaction force on the individual tools 19-22 and reduce the normal variations caused by thickness variations of the blanks, manufacturing deviations and accuracy of the press, elastic deformation of the tools and the tool mounting.
  • the movement of the upper tool 13 can be stopped in other ways than by the cooperating bottom elements, for example by limiting of the stroke of the slide 14.
  • a finished product 30 is shown and only in cross section in figure 2. It is shown as the example hat beams.
  • the tools are provided in the common way with cooling channels through which cooling water flows.
  • the hot blanks of hardenable steel are transported from a furnace to the press and after the pressing, they will be kept in the closed press until they have hardened.
  • Figure 3 shows a modified embodiment which controls the power distribution between several surfaces or all surfaces of the finished product, in this case between the flanges 41 , (the side flanges) and the top 40 of the hat beam 30.
  • the movable tool 13 has a movable shaping element 42 which is backed by a distance element 43 and a pre-stressed spring element 44.
  • the parts 42,43,44 may be located inside the fixed tool 12.
  • the invention is not limited to the example press hardening, but can be utilized for other pressing, for example hot forming without hardening and cold forming.
  • the invention may be used for pressing of other metals than steel and for other materials.

Abstract

Several products (30) are pressed simultaneously in a press with two tools (12,13), and movable individual shaping elements (19-22, 42) in at least one of the tools are used for the shaping of the individual products. The shaping elements rest directly or indirectly on pre-stressed spring elements (23). The method may be used for cold forming, hot forming, and press-hardening.

Description

Press and method for the simultaneous shaping of more than one thin product.
Field of the invention
This invention relates to a press for the shaping of thin sheets to thin products, comprising two cooperating tools and means for pressing one of the tools against the other for the simultaneous shaping of more than one thin product between the tools. The invention relates also to a method for the simultaneous shaping and press-hardening of more than one product in a press.
Background of the invention
Press-hardened beams, for example bumper beams and B-pillars for the automotive industry are usually manufactured in presses of this kind. The tools are cooled and the hot-formed products are hardened with the tools as a fixture after the shaping. Simultaneous shaping in ordinary hot forming and cold forming is also common.
Object of the invention
It is an object of the invention to achieve a uniform quality when several blanks are simultaneously pressed to products.
Brief description of the invention
One of the tools has, for each thin product, an individual forming element which directly or indirectly rests on a pre-stressed spring element for defining the maximum press force for the thin product when the tools are forced together. The invention is defined by the claims.
Brief description of the drawings
Figure 1 shows in cross section a press in its open position.
Figure 2 shows parts of the press in figure 1 in its closed position.
Figure 3 shows a cross section of a modified portion of figure 1 in closed position.
Figure 4 corresponds to figure 3, but showing the press in its closed position.
Figure 5 shows a pre-stressed spring element.
Description of the illustrated example of the invention
Figures 1 and 2 show a press having a frame 11 with a fixed tool and a movable tool 13.The upper tool 13 is the movable one and it is controlled by a slide 14, which is hydraulically driven. The lower tool has a number of cavities 15,16,17,18, for example four as shown, and in the cavities are individual tools, shaping elements 19,20,21 ,22, slidable and they rest on a number of pre-stressed elastic elements 23. Such a pre-stressed element is shown as figure 5 and may, as shown, consist of a stack of spring washers 24 compressed between end plates 25. The end plates are held together by a plurality of screws 26. The pre-stress causes the spring force not to vary so much with the compression, thus equalizing tolerances. Figure 1 shows the press open, i.e. the upper tool 13 is lifted and four flat thin blanks 24 are inserted to rest on the four individual tools 19-22 of the lower tool. Figure 2 shows the press in its closed position, that is, the upper tool 13, the stamp, has punched down and fully formed the blanks 24 between the upper tool 13 and the individual tools 19-22 of the lower tool 12 just before or when the upper tool bottomed on the lower one by means of cooperating bottoming elements 27,28. The pre-stressed elements 23 provide a defined reaction force on the individual tools 19-22 and reduce the normal variations caused by thickness variations of the blanks, manufacturing deviations and accuracy of the press, elastic deformation of the tools and the tool mounting. The movement of the upper tool 13 can be stopped in other ways than by the cooperating bottom elements, for example by limiting of the stroke of the slide 14.
A finished product 30 is shown and only in cross section in figure 2. It is shown as the example hat beams. The tools are provided in the common way with cooling channels through which cooling water flows. The hot blanks of hardenable steel are transported from a furnace to the press and after the pressing, they will be kept in the closed press until they have hardened.
Figure 3 shows a modified embodiment which controls the power distribution between several surfaces or all surfaces of the finished product, in this case between the flanges 41 , (the side flanges) and the top 40 of the hat beam 30. The movable tool 13 has a movable shaping element 42 which is backed by a distance element 43 and a pre-stressed spring element 44. Alternatively, the parts 42,43,44 may be located inside the fixed tool 12. For products of more complicated shape, there may be parts 42,43,44 both in the fixed tool 12 and in the individual tool 19. Besides good tolerances on all surfaces, good contact with both tools is obtained on all surfaces during the hardening, which ensures uniform hardening.
The invention is not limited to the example press hardening, but can be utilized for other pressing, for example hot forming without hardening and cold forming. The invention may be used for pressing of other metals than steel and for other materials.

Claims

Claims
1. Press for the shaping of thin products, comprising two cooperating tools
(12,13) and means (11) for pressing one of the tools against the other for the simultaneous shaping of more than one thin product (30) between the tools, characterised in that,
for each thin product (30), one of the tools has an individual shaping element (19-22,42), which directly or indirectly rests on a pre-stressed spring element (23) for the defining of the maximum pressing force for the thin product when the tools are forced together.
2. Press according to claim 1 , characterised in that each individual shaping element (19-22 42) is slidably positioned in a cavity (15-18) and is loaded by the pre-stressed spring element (23) which is positioned in the cavity behind the shaping element.
3. Press according to claim 3, characterised in that the pre-stressed spring elements (23,44) are provided for shaping elements (19,42) against various surfaces of the individual product.
4. Method for the simultaneous press-hardening of more than one product in a press with two cooperating tools (12,13) characterised in that individually movable shaping elements (19-22,42) are used for the shaping of the individual products, wherein the shaping elements directly rest on prestressed spring elements (23).
5. Method according to claim 4 for the shaping of hat beams, characterised in that individually pre-stressed shaping elements(19,42) are used for the top surface (40) and the side flanges (41) of the hat beam.
EP17847090.2A 2016-09-01 2017-08-31 Press and method for the simultaneous shaping of more than one thin product Pending EP3507037A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1630210A SE539944C2 (en) 2016-09-01 2016-09-01 Ways and means of forming several products in a press simultaneously
PCT/SE2017/000034 WO2018044217A1 (en) 2016-09-01 2017-08-31 Press and method for the simultaneous shaping of more than one thin product

Publications (2)

Publication Number Publication Date
EP3507037A1 true EP3507037A1 (en) 2019-07-10
EP3507037A4 EP3507037A4 (en) 2020-07-15

Family

ID=61066502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17847090.2A Pending EP3507037A4 (en) 2016-09-01 2017-08-31 Press and method for the simultaneous shaping of more than one thin product

Country Status (3)

Country Link
EP (1) EP3507037A4 (en)
SE (2) SE539944C2 (en)
WO (1) WO2018044217A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109290745B (en) * 2018-11-06 2021-06-08 俞红春 Production process of copper cap

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387583A (en) * 1980-08-18 1983-06-14 Ready Systems, Inc. Bending and forming tool
JPH0775735B2 (en) * 1989-12-09 1995-08-16 株式会社ユタカ技研 Multi-part molding die
JP2003053437A (en) * 2001-08-10 2003-02-26 Niigata Prefecture Continuous press working equipment for magnesium alloy
FR3017810B1 (en) * 2014-02-25 2016-08-26 Renault Sa PRESS ARRANGEMENT FOR ENHANCED TRANSMISSION OF EFFORTS WHEN BURNING A WORKPIECE
DE102014112320B4 (en) * 2014-08-27 2016-12-15 Benteler Automobiltechnik Gmbh Press forming tool with compensation pad
DE102014017488B4 (en) * 2014-11-27 2019-05-23 Schuler Pressen Gmbh Method for the molding or press hardening of a metal component and hydraulic press for carrying out the method
KR101665796B1 (en) * 2014-12-23 2016-10-13 주식회사 포스코 Apparatus for press forming
DE102015101668A1 (en) * 2015-02-05 2016-08-11 Benteler Automobiltechnik Gmbh Double falling heating and forming tool and method for producing thermoformed and press-hardened motor vehicle components

Also Published As

Publication number Publication date
EP3507037A4 (en) 2020-07-15
WO2018044217A1 (en) 2018-03-08
SE1630210A1 (en) 2018-02-06
SE539944C2 (en) 2018-02-06

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