EP3116669A1 - Matrice avec ejecteur pour embouti avec gouttiere en bordure - Google Patents
Matrice avec ejecteur pour embouti avec gouttiere en bordureInfo
- Publication number
- EP3116669A1 EP3116669A1 EP15709230.5A EP15709230A EP3116669A1 EP 3116669 A1 EP3116669 A1 EP 3116669A1 EP 15709230 A EP15709230 A EP 15709230A EP 3116669 A1 EP3116669 A1 EP 3116669A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- matrix
- die
- shoulder
- forming
- stamp
- 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
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000011159 matrix material Substances 0.000 claims description 45
- 230000003213 activating effect Effects 0.000 claims 1
- 238000007493 shaping process Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
-
- 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
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
Definitions
- the invention relates to the field of stamping including body parts of a motor vehicle. More particularly the invention relates to a die, a tool and a method of forming a stamp.
- a stamp is a metal part in progress or at the end of manufacture, in thin sheet metal, obtained by stamping.
- FIG. 1 illustrates a known stamp 2 of a motor vehicle body, in this case a roof covering intended to cover the structure of a vehicle.
- the cover in question is obtained after several shaping operations, one of which is a shaping of two edges, one edge 4 may be shaped gutter at one end of the cover, an edge 5 may be another shoulder.
- the lateral edges 3 of the stamping can be folded.
- FIG. 2 represents a sectional view of a tooling 6 according to the prior art used to shape an edge such as the edge 4 illustrated in FIG. 1.
- the slightly curved central part of the cover is previously shaped.
- a fixed punch 8 and a counter form 10 form a contact surface 12 of the stamp 2 for the purpose of shaping. Part of the surface 12 allows clamping of the stamping 2.
- the clamping in question is carried out during a shaping cycle during the descent of a frame 14 comprising a spring-loaded presser 16.
- a slider system provided with a secondary presser 20 and a movable punch 22 presses the end 24 of the press and then shapes the channel 4, the mobile punch 22 deforming the stamping in the counter form 10.
- the clearance stamping occurs during the cycle away from the frame 14, the movable punch 22 and against the form 10 being spaced from the stamp 2.
- the presser 16 also deviates from the stamped form. It is known to use this type of technique for forming re-entrant edges against undercut.
- the force of the clamping is proportional to the energy required for the deformation, it may result in the appearance of quality defects in the case where it is applied to visible parts of the stamping. This is the case for the stamping shown, a marking line forming at the clamping of the counter form 10 and the fixed punch 8.
- the quality defects cause a rebus which is an economic loss in the vehicle manufacturing process.
- Such tooling against form is also substantially expensive to achieve.
- the patent document FR2523485 discloses an ejection element carried by a stamping body for forming a metal part.
- the body comprises a channel in which the element can slide, actuated by a piston, in order to be able, in its extended position, to clear a workpiece after it has been shaped. This is obtained between a punch, a die and the ejection element which is pushed back into its contraction position.
- This teaching is interesting with regard to the release of a pressed stamp formed with for example a cavity. However, it must take into account the friction between the shaped face of the stamping with the tool, its sliding during the ejection can increase the machine downtime for cleaning, or even impact the quality of the finished part.
- the invention aims to propose a solution to the problems encountered by the state of the art such as those mentioned above. More particularly, the invention aims to provide a press tooling solution for stamping, which facilitates the release of a stamping having a shaped cavity-shaped, and is more economical.
- the subject of the invention is a die-forming die, particularly of a body, comprising a generally extended surface intended to come into contact with the stamping, said surface comprising a portion forming a shoulder; and an ejector of the stamped out of the die, notable in that the ejector is oriented to move the stamp in a direction substantially parallel to the mean plane of the extended surface.
- the ejection direction forms an angle of less than thirty degrees with the mean plane of the extended surface, preferably less than twenty degrees, more preferably less than ten degrees.
- the ejector is configured to come into contact with the stamping in the portion forming the shoulder.
- the ejector is configured to pass through at least one orifice of the die emerging on the portion forming the shoulder.
- the ejector comprises at least one rod sliding through the orifice, said rod or rods being preferably actuated by a jack, preferably a pneumatic jack, said cylinder being fixed to the matrix.
- the travel distance of the sliding rod outside the die when the ejector is activated is between twenty millimeters and eighty millimeters.
- the ejector comprises two rods each sliding through an orifice.
- the portion forming the shoulder is located at an edge of the die.
- the portion forming the shoulder forms an undercut relative to an ejection direction generally perpendicular to the mean plane of the extended surface.
- the end of the sliding rod of the ejector comprises a concave surface so as to match the shape of the stamping at the undercut of the portion forming the shoulder.
- a portion of the sliding rod forms an oblong round section.
- the invention also relates to a forming tool of a stamped, comprising a matrix; a presser for cooperating with the matrix by approximation to form the stamping; and a movable punch adapted to cooperate with a portion of the matrix forming a shoulder, remarkable in that the matrix is in accordance with the invention.
- the tooling comprises a first frame, the presser being movably mounted on said first frame by springs, preferably of the helical type.
- the mobile punch is fixed in a slider moving in a direction forming a non-zero angle with the direction of movement of the presser.
- the inclination between the direction of movement of the presser and that of the punch is between five degrees and twenty-five degrees.
- the first frame comprises at least one falling blade capable of folding an edge of the stamping around an edge of the die.
- the tooling further comprises a fixed punch with a contact surface with the stamping extending the surface portion of the matrix forming the shoulder, the die being movable relative to said punch. fixed.
- the contact surface of the fixed punch may be in the form of a braking ring.
- the tooling comprises a second frame, the die and the fixed punch being mounted on the second frame.
- the matrix is mounted on an elastic system, preferably helical type springs, more preferably gas adjustable springs.
- the slider comprises a secondary spring-mounted presser, said presser being able to cooperate with the fixed punch.
- the clamping force between the presser and the die is between fifteen tons and twenty tons.
- the contact surface of the fixed punch is a first surface, said punch comprising a second contact surface with the stamping, extending the contact surface of the die at an edge opposite the portion forming the shoulder, said second surface also forming a shoulder.
- the second contact surface comprises a clamping portion with the presser.
- the boundary between the die and the fixed punch, intended to be in contact with the stamping is located on a non-visible portion of the stamping.
- the first frame comprises a second movable punch configured to cooperate with the second contact surface also forming a shoulder.
- the subject of the invention is also a method of forming a stamped article, in particular of a motor vehicle body, comprising the following steps: a) clamping a stamping between a first frame comprising a presser and a movable punch, and, a second frame comprising a matrix and a fixed punch b) forming at least one shoulder in the stamping by application of the movable punch on the die, remarkable in that the die is in accordance with the invention, and by the following step: c) removal of the fixed punch from the die and activation of the ejector of the die for ejection of the stamping.
- the shaped shoulder has a gutter shape, preferably a cavity.
- the method comprises the use of a tool according to the invention, the method comprising an intermediate step b ') of removal of the movable punch from the die, said distance being effected by a first relative spacing between the first frame and the second frame, the presser remaining in the working position.
- the distance of the punch from the die in step c) is by a second relative distance between the first frame and the second frame, the presser releasing the clamping of the press, the matrix moving away from the second frame pushed by its elastic connection to the second frame.
- the stamping is a bodywork element, preferably a roof covering.
- the stamping has a length of between one meter eighty and two meters fifty, it has a width of between fifty centimeters and one meter fifty. According to an advantageous embodiment, the stamping has a thickness of between three tenths of a millimeter and one millimeter twenty-five, preferably between five tenths and eight tenths of a millimeter.
- the measures of the invention are interesting in that they allow the ejection of a stamping with a shoulder, this shoulder may be located at an edge or form a cavity. Indeed, depending on the profile of the shoulder and / or the friction forces between the shoulder and the matrix, the lateral ejection, that is to say in a direction transverse to the direction of stamping allows a sliding of the stamping on the surface of the matrix and, therefore, easy ejection of the shoulder. In the case where several shoulders are present on the stamping, the use of a fixed punch makes it possible to release the one or more shoulders during the relative movement of the die and hence to disengage this or these shoulders and to allow the sliding of the stamp.
- FIG. 1 is a view of a stamping comprising at least one edge forming a shoulder
- FIG. 2 is a sectional view of a known stamping press tooling provided with a die and a counter-shape for shaping the edge of the stamping die of FIG. 1;
- FIG. 3 is a sectional view of a press stamping tool according to the invention, a movable punch being in a close position of a die for forming the shoulder of the stamping of the figure 1 ;
- FIG. 4 is a view of the tool of FIG. 3, the movable punch being in a position remote from the die;
- FIGS. 5 and 6 are views of the die and the fixed punch of FIGS. 3 and 4 at the final stages of release of the stamping
- Figures 1 and 2 have been previously described in connection with the discussion of the state of the art.
- Figures 3 to 5 are views of a press stamping tool 106 according to the invention, each of them having the tool 106 in a particular phase of the stamping process according to the invention.
- FIG. 3 is a sectional view of a stamping press tooling 106 in accordance with the invention and shown in the step of forming a gutter 104 on an edge 134 of a stamp 102.
- shape can also be that of a cavity in a central part of the stamping.
- the tooling 106 mainly comprises a die 126, a presser 1 16, a movable punch 122 and a fixed punch 108.
- the die 126 is movable relative to the fixed punch 108 so as to to be able to perform a clearance of the part described in detail below.
- the matrix 126 and the fixed punch 108 comprise surfaces intended to come into contact with the stamp 102. More precisely and in the working position of the tool as shown, the contact surface 128 of the fixed punch 108 is in the extension a portion 130 of the contact surface of the matrix forming a shoulder.
- the border 132 between the die 126 and the fixed punch 108, and intended to be in contact with the stamp 102 is located on a non-visible portion of the embossed 102. This is indeed the limit 132, which, as seen above in relation to the state of the art, is a classic place of possible quality defect of the embossed 102. This limit 132 is in this case at a line of cut of the stamp.
- the contact surface 1 12 of the matrix is generally extended; the portion 130 forming a shoulder, located at an edge 134 of the die 126, is intended to cooperate with the movable punch 122 for forming the stamping 102, the remaining contact surface 135 is intended to cooperate with the presser 1 16 for clamping the stamp 102.
- the contact surface 128 of the fixed punch 108 seen above is a first surface
- the fixed punch 108 may include a second surface 138 of contact with the stamping 102, extending the contact surface of the matrix 1 12 to an opposite edge 140 to the portion 130 forming the shoulder.
- This second surface 138 may also form a shoulder.
- a clamping space 142 is provided with the presser 1 16 on this second surface 138 for shaping this end 140 of the stamping 102.
- a second movable punch (not shown) is intended to cooperate with the second contact surface 138 so as to perform the shaping in question.
- the contact surface 135 between the matrix 126 and the presser January 16 may be limited at its periphery as well as on a few point surfaces in the inner part of the matrix.
- the presser may be configured not to tighten the die 126 on its edge surface 144 extending the second surface 138 of the fixed punch.
- Figure 3 shows the die 126 including an eductor 146 of the stamp 102 out of the die 126.
- the ejector 146 is oriented to move the stamp 102 in a direction substantially parallel to the mean plane of the extended surface 1 12 of the matrix 126.
- the matrix 126 comprises at least one orifice 148 in the surface portion 130 forming the shoulder and the ejector 146 is configured to pass through the orifice (s) 148 in order to come into contact with the embossment 102
- the ejector 146 comprises at least one rod 150 sliding through the orifice 148.
- the travel distance of the sliding rod 150 outside the die 126 which distance can be adjustable according to the displacement distance of the desired press, can be between twenty milli meters and eighty millimeters.
- the ejector 146 may comprise two rods 150 each sliding through an orifice 148 of the matrix 1 26.
- the portion 130 forming the shoulder forms an undercut relative to an ejection direction generally perpendicular to the mean plane of the extended surface 1 12.
- the end of the sliding rod of the ejector may include a concave surface outwardly to conform to the shape of the stamp 102 at the undercut.
- the section of the sliding rod can have an oblong round shape.
- Figure 3 also shows two frames (114, 154) movable relative to each other.
- the first frame 1 14 carries the presser 1 16 mounted on springs 1 18 which can be of helical type; it also carries a slider 156 to which the movable punch 122 is attached.
- the slider 156 moves in a direction forming an angle with the direction of movement of the presser 1 16.
- An angle gear 158 fixed relative to the second frame 154, allows this inclined movement.
- the inclination between the direction of movement of the presser 1 16 and that of the movable punch 122 may be between five degrees and twenty-five degrees.
- the first frame 1 14 further comprises at least one falling blade (not shown) for folding an edge of the stamping 102 around an edge (not shown) of the die 126. this edge being, by way of example, adjacent to that 130 comprising the shoulder.
- the second frame 154 comprises the matrix 126 and the fixed punch 108. More specifically, the die 126 is mounted on an elastic system 160 which may be a helical spring system or gas adjustable springs, the latter embodiment. being favorable to the adjustment of the force of the elastic system 160.
- an elastic system 160 which may be a helical spring system or gas adjustable springs, the latter embodiment. being favorable to the adjustment of the force of the elastic system 160.
- Figure 4 is a view of the tool 106 in the release phase of the movable punch 122 of the stamping 102, in a first phase of separation of the frames (1 14, 154).
- a secondary presser 162 mounted on a spring, can cooperate with the fixed punch 108, in this case comprising a form 164 of braking ring.
- the clamping force between the presser 1 16, the secondary presser 162 and the die 126 may be between fifteen tons and twenty tons.
- the matrix 126 can remain fixed, it can also be mobile, its movement being able to be parameterized at the level of the elastic systems (1 18, 160) carrying the die 126 and the presser 16.
- the die 126 remains fixed at the time of the release of the mobile punch 122 and the secondary presser 162 so as not to generate friction on the stamping 102; the contact surface 128 of the fixed punch 108 always remains, in the latter case, in extension with the portion 130 forming the shoulder of the matrix 126.
- Figures 5 and 6 are sectional views of the tool 106, the matrix 126 and the fixed punch 108 being only shown; these figures illustrate the subsequent steps of clearing the stamping 102 of the process according to the invention.
- FIG. 5 illustrates the clearance phase of the stamping 102 during the removal of the fixed punch 108 from the die 126.
- This distance in this case, is by a second relative distance between the first frame (not shown) and the second frame 154, the presser (not shown) releasing the clamping of the stamping 102, the die 126 moving away from the second frame 154 pushed by its elastic connection 160 to the second frame 154.
- the stamp 102 is thus released from the first surface 136 of the fixed punch 108 as well as the second surface 138 of the fixed punch 108.
- FIG. 6 illustrates the activation phase of the ejector 146 of the matrix 126.
- the embossment 102 is thus released from the portion 130 of the matrix 126 forming the shoulder.
- the surface 135 of the matrix in contact with the stamp 102 is at this stage a sliding surface against a portion of the stamping 102 not shaped during this process step.
- the force exerted by the jack 152 on the sliding rod 150 is transmitted on the gutter 104 shaped embossed 102; this force is configurable so as to ensure the displacement of the stamp 102.
- the lower face 166 of the stamp 102 is in this case a non-visible face.
- the sequential clearance of stamping 102 during the process, and as described above in FIGS. 4 to 6, is particularly advantageous for improving the efficiency of the operation and reducing quality defects.
- the tool 106 with the matrix 126 according to the invention is substantially economical because of its concept of simple operation.
- the stamp 102 may have a length 168 between one meter eighty and two feet fifty, and a width between fifty centimeters and one meter fifty.
- the stamp may have a thickness 170 between three tenths of a millimeter and a millimeter twenty-five, the thickness 170 may be between five tenths and eight tenths of a millimeter.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1451977A FR3018465B1 (fr) | 2014-03-11 | 2014-03-11 | Matrice avec ejecteur pour embouti avec gouttiere en bordure |
PCT/FR2015/050319 WO2015136168A1 (fr) | 2014-03-11 | 2015-02-10 | Matrice avec ejecteur pour embouti avec gouttiere en bordure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3116669A1 true EP3116669A1 (fr) | 2017-01-18 |
EP3116669B1 EP3116669B1 (fr) | 2017-12-20 |
Family
ID=50549185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15709230.5A Active EP3116669B1 (fr) | 2014-03-11 | 2015-02-10 | Matrice avec ejecteur pour embouti avec gouttiere en bordure |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3116669B1 (fr) |
CN (1) | CN106102947B (fr) |
FR (1) | FR3018465B1 (fr) |
WO (1) | WO2015136168A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3050129B1 (fr) * | 2016-04-14 | 2018-04-13 | Peugeot Citroen Automobiles Sa | Presse comportant une contre-forme, une matrice et un poincon a maintenance facilite et procede de maintenance d’une telle presse |
JP6898397B2 (ja) * | 2019-08-09 | 2021-07-07 | 本田技研工業株式会社 | プレス成形装置及びプレス成形方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4331017A (en) * | 1980-12-11 | 1982-05-25 | Joseph Bulso, Jr. | High reduction process and apparatus |
JPS61158318U (fr) * | 1985-03-19 | 1986-10-01 | ||
FR2625454A1 (fr) * | 1988-01-04 | 1989-07-07 | Ademva | Outil a suivre pour presse d'emboutissage |
CN201008913Y (zh) * | 2007-02-08 | 2008-01-23 | 佛山市顺德区汉达精密电子科技有限公司 | 一种侧边冲切模具 |
CN201960053U (zh) * | 2011-01-11 | 2011-09-07 | 昆山荣腾模具部品制造有限公司 | 一种反压脱料机构 |
JP2013078777A (ja) * | 2011-10-03 | 2013-05-02 | Hirotec Corp | プレス金型 |
-
2014
- 2014-03-11 FR FR1451977A patent/FR3018465B1/fr active Active
-
2015
- 2015-02-10 EP EP15709230.5A patent/EP3116669B1/fr active Active
- 2015-02-10 CN CN201580013504.XA patent/CN106102947B/zh active Active
- 2015-02-10 WO PCT/FR2015/050319 patent/WO2015136168A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3116669B1 (fr) | 2017-12-20 |
CN106102947B (zh) | 2018-03-16 |
FR3018465B1 (fr) | 2016-11-18 |
WO2015136168A1 (fr) | 2015-09-17 |
CN106102947A (zh) | 2016-11-09 |
FR3018465A1 (fr) | 2015-09-18 |
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