EP1173298B1 - Procede et outils d'emboutissage et applications notamment a l'emboutissage de banquettes - Google Patents

Procede et outils d'emboutissage et applications notamment a l'emboutissage de banquettes Download PDF

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Publication number
EP1173298B1
EP1173298B1 EP00920819A EP00920819A EP1173298B1 EP 1173298 B1 EP1173298 B1 EP 1173298B1 EP 00920819 A EP00920819 A EP 00920819A EP 00920819 A EP00920819 A EP 00920819A EP 1173298 B1 EP1173298 B1 EP 1173298B1
Authority
EP
European Patent Office
Prior art keywords
punch
blank holder
interval
stamping method
tool
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.)
Expired - Lifetime
Application number
EP00920819A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1173298A1 (fr
Inventor
Philippe Furodet
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.)
SERINOX SA
Original Assignee
SERINOX SA
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 SERINOX SA filed Critical SERINOX SA
Publication of EP1173298A1 publication Critical patent/EP1173298A1/fr
Application granted granted Critical
Publication of EP1173298B1 publication Critical patent/EP1173298B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/04—Metal chairs, e.g. tubular

Definitions

  • the present invention relates to the technical sector of stamping of sheet metal, and the products thus obtained.
  • stamping is an operation that consists in transforming a sheet into an article or product presenting a certain shape or precise geometry, by means of a press.
  • Such a press is represented in principle in FIG. 9.
  • the stamping plate T is placed above a punch 4, held between a blank holder consisting of two parts of symmetrical blanks 3, (hereinafter for the sake of clarity "Two blanks") front and rear rear rear AV, (AV and AR designating, as shown in the accompanying drawing, the scroll direction of the sheet - the sheet scrolling from the "AV” which marks its entrance under the press towards the part “AR” which marks the exit of the sheet from under the press, and each element of press or tool will be identified thus, see the appended figures, by its parts AV and AR, according to the same convention, in the following - in case of successive multiple stampings on the same sheet, for example to form repetitive series of stamped shapes whose total length is much greater than the width of the press, this width can not naturally be increased at will , for obvious reasons of cost) said negative punch having the geometrical shape 5 intended to form a positive impression in the sheet, when the press-table 1 and the dies 2 and the tool 10 having the shape or geometry 5 in
  • Such marks are hardly acceptable on a finished product, especially on a finished product that is not destined to undergo a stage additional protective or decorative coating deposit, or similar.
  • stainless steel is known to be even more difficult to stamp that steel. It therefore requires a more powerful tightening, so with a even greater risk of tagging. But stainless steel is a natural material of choice for a large number of equipment, including benches for travelers or waiting rooms in general.
  • the problem solved by the invention is thus to remove the marks of tightening and crimping or deformation folds, when stamping sheet metal according to a "marked" punch geometry compared to the initial plan of the sheet.
  • Such benches are shown schematically in FIG. 2 attached.
  • the sheet T has been stamped so as to show hollow forms or impressions of seats 11, 12, etc. separated by a interval i.
  • Such benches manufactured by stamping are significantly less expensive than molded plastic benches.
  • the invention also makes it possible to stamp plastic material or composite materials.
  • the hollow forms are progressive and all forms of the bench must be smoothly curved for the comfort of the seat, as shown in Figure 3 attached. These forms are obtained, naturally, by the precise geometry 5 of the punch 4 and the tool corresponding 10.
  • the interval i is defined more precisely in FIG. and we see that i represents the length of the plane section separating the two leaves (or rounded) 115 and 116.
  • interval i is too small, it occurs during the usual processes embossing, and on conventional tools, the marks of tightening and deformation described above. But a small interval i is precisely required to place a maximum of passengers on a minimum length. Among other things, the length is determined by the gauges of trains or oars. The interval i often required is such that it drives with conventional tools the aforementioned marks.
  • the sheets T used are sheets which are preferably already covered with a coating before stamping, which is preferably definitive, and it will not be possible in this case disappear these marks later.
  • FIGS. 1 to 9 are naturally given to non-restrictive title.
  • the invention relates in a very general a stamping process according to which the rear flank (AR) 20 is widened to the rear and geometrically adapted to the level of the area 14, ie preferably the area adjacent to the punch, to reproduce at least a part of the shape created by the punch 4 on its part AV.
  • the AR blank can also preferably reproduce exactly half the AV shape of the punch, or even more than half, and up to the whole, of the shape created by the punch but the whole would be unnecessarily expensive and less easy handling in the process in successive steps which will be described below.
  • the blank holder AV 30 may have a surface or profile 8 slightly curved favoring the transition of deformation of the sheet towards the punch. This may be of interest in some applications.
  • the AR rear flange clamp is widened backward relative to the dimensions of the prior art and present on the end adjacent to the punch (that is to say the front end of the blank holder back) a curved shape, ie a shape that allows deformation progressive of the sheet in depth, and over a greater length of blank holder, instead of the right angle blanks of the prior art.
  • the front blank (AV) 30 is also expanded (forward) but does not require adaptation of its geometry, that is to say that its surface 8 remains flat but is enlarged towards the front compared to the usual dimensions of the prior art.
  • the Applicant considers that the adaptation of the AR blank holder to at least a part of the geometry of the shape created by the punch in its AV part makes it possible to tighten more progressive while better distributing the efforts of the press on the sheet metal, both in terms of surface area and time.
  • the sheet would thus have more ability to adapt to the efforts, and would deform without developing clamp marks or crimps or folds, even in the case of "marked" geometry as defined above.
  • the enlargement of the AV 30 blank holds the same concern for better distribute the tightening forces then deformation.
  • This enlargement of AV 30 is less critical than the adaptation of the rear AR 20, but represents an advantageous characteristic according to a preferred mode of the invention.
  • An important advantage of the invention in addition to the disappearance of the marks of tightening and creases or crimps, and that was brought to light while he was doing part of the original technical problem, is that it is possible to greatly reduce the pressure to be exerted by the press.
  • the prior art uses a force of about 500 t that the invention merely uses 150 to 300 or 350 t for the same sheet.
  • the adaptation geometric shape of the AR blank holder represents half of the shape created by the punch 4 in its AV part.
  • Figures 6 and 7 show non-limiting examples of the invention, suitable for the stamping of multi-seater benches, especially two to six places or more.
  • FIG. 6 shows in perspective that the blank greenhouse AR 100 reproduces, according to this particular non-limiting embodiment, half of the seating form created by the punch 120 in its AV part.
  • the blank holder 100 could only reproduce part of the Punch seat shape, less than half.
  • the AR blank holder could also reproduce more than half, and up to all, of the form created by the punch, but the whole would be unnecessarily expensive and handling less easy in the process in successive steps which will be described below.
  • the AV 110 blank holder has been widened forwards as indicated above according to a non-mandatory option, but we see that, in this example, its profile 8 remains horizontal.
  • FIG. 7 illustrates the process according to the invention.
  • FIG. 7 shows that the blank holder AR 100 reproduces in its part B la half of the seat impression, identical to the half-form A of the punch 120 in its AV part, the arrow indicating the direction of movement step-by-step of prison.
  • the tool comprises, between the blank holder AR 100 and the punch 120, a shoulder 150 which reproduces the interval i to exist between two successive footprints.
  • the curve in half-footprint of the AR 100 blank holder reduces the stress on the sheet metal (as well as the pressing pressure), the assembly allowing reduce the interval i to low values, of the order of 1 to 3 or 5 cm for sheets of 15/10 mm or even 12/10 mm or even 10/10, 8/10 or 6/10 mm, which was impossible in the prior art without marking and without creases or creases.
  • the smallest interval i that could be achieve was 3 to 10 cm for a sheet of 15/10 mm and 5 to 12 cm for a sheet of 12/10 mm, without being able to avoid the aforementioned drawbacks.
  • the invention therefore makes it possible, for the same interval i controlled, to use a thinner sheet, which represents a significant saving of material.
  • the invention also makes it possible, as we have seen, to reduce the interval.
  • Another advantage lies in obtaining, according to the invention, forms smooth curves at the interval, whereas in the prior art always find in this place a flat area.
  • the invention thus allows the skilled person to play on these two parameters, range and thickness, to best fit the order from his client.
  • part B represents a half form
  • the stamping process comprises a step of preforming the sheet, as shown in FIG. figure 5.
  • the tool, punch 4 and die 10 is here represented as well as the sheet T in section cross.
  • sheet metal is preformed using a folding machine.
  • the invention makes it possible to use a preform simplified by compared to that which was mandatory in the prior art.
  • the sheet is preformed according to the line a, b, c, rounded part d, e, f. All sections are straight, except curvature d.
  • a preform comprising basically straight sections a, b, c, e and f, and only one part rounded d, the whole representing only 19 folds instead of 84.
  • the invention also covers a first variant according to which the preform would consist of sections a, b, c, d, g (right).
  • the invention also covers a second variant according to which the preform would consist of sections a, h (right), d, e, f.
  • the invention also covers a third variant according to which the preform would be formed of sections a, h (right), d, g (right).
  • the sheet is positioned (as in FIG. 7) without worrying align it vertically with the punch and die.
  • the sheet can be offset for example by the distance m from the vertical alignment.
  • the press is then slowly lowered and the sheet is allowed to focus on itself. even on the tool.
  • the invention also opens the perspective, which was not part of technical problem initially posed, and is therefore surprising, to modify the "step" imposed by the tool.
  • the step can be modified at will by designing the tool in two parts separated by a transversal cut (that is to say perpendicular to the direction of scrolling of the sheet metal), which forms the basic tool at the minimum pitch, then deviating from the desired value E of pitch change the two parts of the tool thus created by said cut, and inserting in gap E a game of four removable parts, called 460 matrix wedge, of punch 480 and blank holder 490 and 420.
  • a transversal cut that is to say perpendicular to the direction of scrolling of the sheet metal
  • the invention also covers the tool as described, adapted for manufacturing multi-seater banquettes, including two to six or eight seats or more requiring several forms or successive footprints 11, 12, separated by an interval i, characterized in that, so that the step of the stamping can be modified at will, the tool is designed in two parts separated by a transverse cut (ie perpendicular to the running direction of the sheet) at the middle of the punch (4, 120), which forms the basic tool at the minimum pitch, which can be separated from each other by the desired value E of modification of the pitch and in that the tool comprises one or more sets of four pieces demountable, called die 460, punch 480 and blank hold 490 and 420, adapted to be inserted in the gap E with a suitable clearance.
  • a transverse cut ie perpendicular to the running direction of the sheet
  • the tool comprises one or more sets of four pieces demountable, called die 460, punch 480 and blank hold 490 and 420, adapted to be inserted in the gap E with a suitable clearance.
  • the invention applies to the stamping of all parts similar to the example described, and in particular to any room presenting repetitive footprints close together, but also to coin stamping in thin sheet metal, even in a non-repetitive form, where there are problems marking and folds or crimps.
  • the invention makes it possible to stamp sheets of various usual thicknesses, in using as it has been said a very small press force, of the order of the half of the usual force in general, and to stamp various sheets common or stainless steels, or various common alloys, bearing a temporary, temporary or permanent coating, or a sub-coat of primer, or to draw stampings of plastic sheets or composites of any type.
  • the press and the tool may be a press heating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP00920819A 1999-04-21 2000-04-14 Procede et outils d'emboutissage et applications notamment a l'emboutissage de banquettes Expired - Lifetime EP1173298B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9905220 1999-04-21
FR9905220A FR2792558B1 (fr) 1999-04-21 1999-04-21 Procede et outils d'emboutissage, applications notamment a l'emboutissage de banquettes, et articles emboutis, notamment banquettes ainsi obtenues
PCT/FR2000/000995 WO2000064607A1 (fr) 1999-04-21 2000-04-14 Procede et outils d'emboutissage, applications notamment a l'emboutissage de banquettes, et articles emboutis, notamment banquettes ainsi obtenues

Publications (2)

Publication Number Publication Date
EP1173298A1 EP1173298A1 (fr) 2002-01-23
EP1173298B1 true EP1173298B1 (fr) 2005-07-27

Family

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Application Number Title Priority Date Filing Date
EP00920819A Expired - Lifetime EP1173298B1 (fr) 1999-04-21 2000-04-14 Procede et outils d'emboutissage et applications notamment a l'emboutissage de banquettes

Country Status (8)

Country Link
EP (1) EP1173298B1 (zh)
JP (1) JP2002542038A (zh)
KR (1) KR20020012545A (zh)
CN (1) CN1255230C (zh)
AU (1) AU4125400A (zh)
DE (1) DE60021550D1 (zh)
FR (1) FR2792558B1 (zh)
WO (1) WO2000064607A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154837B (zh) * 2014-09-04 2017-08-18 中国工程物理研究院机械制造工艺研究所 一种基于标准心轴的四极杆组件装配装置
CN111182979A (zh) * 2017-10-06 2020-05-19 蒂森克虏伯钢铁欧洲股份公司 借助于预成型构件制造成型板材构件的方法和装置
CN115179042A (zh) * 2022-08-29 2022-10-14 如皋市宏茂重型锻压有限公司 一种铸造盘的冲压锻件褶皱清除装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9420200U1 (de) * 1994-12-07 1995-02-02 Weiler, Nikolaus, 12055 Berlin Formkörper für Sitzmöbel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339032A (en) * 1941-06-25 1944-01-11 Schlenxig Benhardt Forming die
JPS5897429A (ja) * 1981-12-07 1983-06-09 Nissan Motor Co Ltd ドロ−用プレス金型
JPS5987925A (ja) * 1982-11-12 1984-05-21 Toyota Motor Corp プレスによる絞り成形法
JPS60166127A (ja) * 1984-02-10 1985-08-29 Nissan Motor Co Ltd パネルのプレス成形方法
JPS61103627A (ja) * 1984-10-27 1986-05-22 Toyota Motor Corp 自動順送り型プレス成形方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9420200U1 (de) * 1994-12-07 1995-02-02 Weiler, Nikolaus, 12055 Berlin Formkörper für Sitzmöbel

Also Published As

Publication number Publication date
CN1352580A (zh) 2002-06-05
FR2792558A1 (fr) 2000-10-27
FR2792558B1 (fr) 2002-01-18
AU4125400A (en) 2000-11-10
DE60021550D1 (de) 2005-09-01
EP1173298A1 (fr) 2002-01-23
KR20020012545A (ko) 2002-02-16
JP2002542038A (ja) 2002-12-10
CN1255230C (zh) 2006-05-10
WO2000064607A1 (fr) 2000-11-02

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