EP3548198A1 - Outillage de presse pour la formation d'un collet par tombage - Google Patents
Outillage de presse pour la formation d'un collet par tombageInfo
- Publication number
- EP3548198A1 EP3548198A1 EP17808553.6A EP17808553A EP3548198A1 EP 3548198 A1 EP3548198 A1 EP 3548198A1 EP 17808553 A EP17808553 A EP 17808553A EP 3548198 A1 EP3548198 A1 EP 3548198A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bowl
- sheet blank
- forming
- collar
- 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.)
- Granted
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/04—Stamping using rigid devices or tools for dimpling
-
- 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
- B21D19/088—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for flanging holes
-
- 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
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
Definitions
- the invention relates to the field of forming collars on sheet blanks by stamping.
- the formation of a collar around an orifice of a sheet blank is generally achieved by means of a stamping tool comprising a punch mounted on a lower frame of a press.
- the formation of the collar is then carried out by moving the sheet blank downwards towards the punch or by means of a cam system configured to move the punch upwards towards the sheet blank, during a movement of descent of the upper building.
- the published patent document US 5,069,051 discloses a stamping tool for producing a threaded collar.
- the collar is previously formed in four steps on a sheet blank.
- the collar is then placed on a receiving surface of the tool.
- the tooling comprises an upper die with a recess configured to laterally compress the collar and a threaded rod located on a lower portion of the tooling, opposite the collar.
- the receiving surface comprising the collar is driven downward and the recess will cover the collar.
- the collar translates along the threaded rod that is found above the collar. When raising the collar, the rod will thread the inner surface of said collar.
- the published patent document DE 10 2008 031 050 A1 discloses a method of forming a collar on a stamped part.
- the collar is made in several stages on a cutting line type tool.
- the method comprises eight steps namely namely an embossing step of the stamped part made in three steps so as to obtain a dome shape.
- a punching step is then performed to form a hole in the dome shape.
- the dome shape is then deformed in several stages so as to obtain the expected collar.
- a thread is then made inside the collar.
- the aforementioned state-of-the-art neck-forming methods include several steps for neck formation, thereby making the neck-forming process complex.
- the invention aims to overcome at least one of the disadvantages of the state of the art mentioned above. More particularly, the object of the invention is to provide tooling for a stamping press enabling the production of collars in a simplified manner. The invention also aims to provide an economical and robust solution.
- the invention relates to a forming tool, on a stamping press, a collar on a blank sheet provided with an orifice, the tool comprising a lower portion forming a receiving surface of the blank of sheet metal;
- a punch capable of forming the collar around the orifice; remarkable in that the punch is an integral part of the receiving surface, said surface forming a bowl around said punch allowing a portion of the sheet blank situated around the orifice to undergo a downward movement during pressing by the the top part.
- the punch Being an integral part of the receiving surface, the punch is fixed relative to the lower part, advantageously integral with said part.
- the receiving surface of the sheet blank comprises an annular portion around the bowl, said portion being at a height greater than or equal to the height of the punch.
- the upper part of said tool comprises a blade configured to press the portion of the sheet blank situated around the orifice, in the bowl, around the punch.
- the blade comprises a contact surface with the sheet blank, having a projecting profile describing a circle, adapted to penetrate the bowl and forming a central cavity adapted to receive the punch.
- the upper part of said tool comprises a blank holder disposed on the periphery of the blade, said blank holder being configured to press the sheet blank against the receiving surface laterally to the bowl.
- the receiving surface of the sheet blank has, outside the annular portion around the bowl, a non-rectilinear profile cooperating with the blank holder.
- the bowl is a first bowl, the non-rectilinear profile cooperating with the blank holder forming a second bowl surrounding the first bowl.
- the bowl has a lateral surface inclined at an angle of between 40 ° and 55 ° in relation to a horizontal plane.
- the subject of the invention is also a process for shaping a sheet blank comprising the following steps: stamping the sheet blank, forming an orifice on the sheet blank, forming a collar around the blank orifice; remarkable in that the step of forming the collar is carried out by means of a tool according to the invention.
- the punch has a diameter greater than the orifice of the sheet blank.
- the measurements of the invention are interesting in that they make it possible to simplify the method of forming a collar on a sheet blank provided with an orifice.
- the receiving surface of the sheet blank located on the lower part of the tool of the invention, forms a bowl around the punch thus making it possible to form a collar around the punch in the direction of movement of the press, that is, vertically downwards.
- the invention makes it possible to form the collar in a single press stroke and also makes it possible to dispense with cam movement transmission systems.
- the presence of a bowl around the punch will allow to obtain a specific shape on the sheet blank around the collar, which will also strengthen the rigidity of the sheet blank. The time and costs of collar production are decreasing.
- FIG. 1 shows a forming tool of a collar on a sheet blank, according to the invention
- FIG. 2 represents an enlarged portion of the receiving surface of the sheet blank of the tool of FIG. 1.
- Figure 3 shows the tool of Figure 1 in a step of forming a collar.
- FIG. 4 shows a blank sheet portion having a collar formed by means of the tooling of FIGS. 1 and 3.
- FIG. 1 shows a tool 2 for forming a collar on a sheet blank 4 according to the invention and FIG. 2 represents an enlarged portion of the tool of FIG. 1.
- Tooling 2 is used on a stamping press.
- the tool 2 comprises a lower part 6 forming a receiving surface 8 of the sheet blank 4 and an upper part 10 able to press the sheet blank 4 against the receiving surface 8.
- the upper part 10 is configured to move in the meaning of work of the press that is to say down.
- the sheet blank 4 has previously undergone a stamping step followed by a step of punching an orifice 12 on the sheet blank 4.
- the orifice 12 is shown in dotted line in FIG. 2.
- the sheet blank 4 embossed as illustrated in Figures 1 and 2 has a specific form of stamping which is not limiting of the invention.
- the tool 2 also comprises a punch 14 for forming the collar (not visible).
- the punch 14 of the tool 2 is an integral part of the receiving surface 8 of the sheet blank.
- the receiving surface 8 of the sheet blank 4 has the particularity of forming a bowl 16 around the punch 14.
- the bowl 16 is preferably circular.
- the bowl 16 allows a downward movement to a portion 18 of the sheet blank situated around the orifice 12 of the sheet blank 4 (FIG. 2), during the pressing of the upper part 10 of the tooling 2.
- the sheet blank 4 is placed on the receiving surface 8 of the sheet blank so as to arrange the orifice 12 of the sheet blank over the punch 14.
- the punch 14 has a diameter greater than the diameter of the orifice 12 in order to allow the extrusion of the collar.
- the upper part 10 of the tooling 2 comprises a blade 20 configured to press the portion 18 of the sheet blank 4 located around the orifice 12, in the bowl 16, around the punch 14. More particularly, the blade 20 comprises a contact surface 21 with the sheet blank 4 which has a projecting profile describing a circle and which is adapted to penetrate the bowl 16. The contact surface 21 of the blade with the blank 4 also forms a central cavity adapted to receive the
- the upper portion 10 comprises a blank holder 22 disposed on the periphery of the blade 20. The blank holder 22 will hold the sheet blank 4 before the action of the blade 20.
- the receiving surface 8 comprises an annular portion 24 around the bowl 16.
- the annular portion 24 is at a height greater than or equal to the height of the punch 14.
- the annular portion 24 is at a height greater than the height of the punch 14. More preferably, the annular portion 24 and the punch has a difference in height between 1, 5 and 3 mm.
- the bowl 16 has a larger diameter and a smaller diameter, the lower diameter being preferably 1.5 times smaller than the larger diameter.
- the upper and lower diameters are respectively related to the working direction of the press, that is to say from top to bottom.
- the bowl 16 has a lateral surface 26 inclined at an angle between 40 and 55 ° relative to a horizontal plane.
- the bowl 16 also has a bottom 28 with a width around the punch 14 of between 4 and 6 mm.
- the receiving surface 8 of the sheet blank has, outside the annular portion 24, a non-rectilinear profile.
- the non-rectilinear profile cooperates with the blank holder 22.
- the non-rectilinear profile which cooperates with the blank holder forms a second bowl 30 which surrounds the first bowl 16.
- FIG. 3 shows the tool 2 of Figure 1 in a collar formation step.
- the blade 20 is lowered against the sheet blank 4 so as to press the sheet blank within the bowl 16.
- the contact surface 21 of the blade 20 presses the portion of the sheet blank around the orifice, within the bowl 16 and around the punch 14, thereby forming a collar 32 around the orifice.
- the collar 32 is directed upwards.
- FIG. 4 illustrates a view from above of the sheet blank 4 after formation of the collar 32 around the orifice 12.
- the sheet blank 4 comprises a shape 34 around the collar 32 due to the presence of the bowl on the tooling of FIG. the invention.
- the shape 34 has the advantage of reinforcing the rigidity of the sheet blank.
- the tooling and the method of the invention may for example be used for the formation of a collar on a sheet blank for the blocking of a motor vehicle bonnet stand, said stand being configured to hold the bonnet in position. opened.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1661921A FR3059576B1 (fr) | 2016-12-05 | 2016-12-05 | Outillage de presse pour la formation d’un collet par tombage |
| PCT/FR2017/053093 WO2018104603A1 (fr) | 2016-12-05 | 2017-11-13 | Outillage de presse pour la formation d'un collet par tombage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3548198A1 true EP3548198A1 (fr) | 2019-10-09 |
| EP3548198B1 EP3548198B1 (fr) | 2020-08-05 |
Family
ID=57796714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17808553.6A Active EP3548198B1 (fr) | 2016-12-05 | 2017-11-13 | Outillage de presse pour la formation d'un collet par tombage |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3548198B1 (fr) |
| CN (1) | CN110049832B (fr) |
| FR (1) | FR3059576B1 (fr) |
| WO (1) | WO2018104603A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2348875A (en) * | 1943-06-11 | 1944-05-16 | Charles L Beard | Punch and die |
| US5069051A (en) * | 1990-09-07 | 1991-12-03 | California Industrial Products, Inc. | Method and apparatus for forming threads on a sleeve inner wall |
| JP3777367B2 (ja) * | 2003-06-23 | 2006-05-24 | 日高精機株式会社 | 熱交換器用フィンの製造方法及びその金型装置 |
| JP2007175761A (ja) * | 2005-12-28 | 2007-07-12 | Seiko Epson Corp | 軸穴形成方法 |
| DE102008031050A1 (de) | 2008-07-01 | 2010-01-07 | Trw Automotive Gmbh | Verfahren zur Herstellung eines Ansatzes, insbesondere am Rahmen eines Sicherheitsgurtaufrollers, sowie Rahmen mit Ansatz für einen Sicherheitsgurtaufroller |
| DE102009038607A1 (de) * | 2009-08-26 | 2011-03-31 | Tox Pressotechnik Gmbh & Co. Kg | Vorrichtung, Verfahren und Werkzeug zur Herstellung eines Kragendurchzuges in einem Bauteil |
| CN102527759A (zh) * | 2010-12-14 | 2012-07-04 | 深圳亿和模具制造有限公司 | 薄板上成型高凸缘的翻孔方法及模具 |
| JP6006656B2 (ja) * | 2012-05-28 | 2016-10-12 | 東プレ株式会社 | 熱間プレス製品の成形方法および熱間プレス製品の製造方法 |
-
2016
- 2016-12-05 FR FR1661921A patent/FR3059576B1/fr not_active Expired - Fee Related
-
2017
- 2017-11-13 EP EP17808553.6A patent/EP3548198B1/fr active Active
- 2017-11-13 WO PCT/FR2017/053093 patent/WO2018104603A1/fr not_active Ceased
- 2017-11-13 CN CN201780075555.4A patent/CN110049832B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018104603A1 (fr) | 2018-06-14 |
| EP3548198B1 (fr) | 2020-08-05 |
| FR3059576A1 (fr) | 2018-06-08 |
| FR3059576B1 (fr) | 2019-06-07 |
| CN110049832B (zh) | 2021-03-19 |
| CN110049832A (zh) | 2019-07-23 |
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