FR2992239A1 - Method for adjustment of stamping tool for stamping cladding panel of motor vehicle, involves checking parallelism of friction plates, and adjusting friction plates such that friction plates are arranged in parallel manner - Google Patents

Method for adjustment of stamping tool for stamping cladding panel of motor vehicle, involves checking parallelism of friction plates, and adjusting friction plates such that friction plates are arranged in parallel manner Download PDF

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Publication number
FR2992239A1
FR2992239A1 FR1255842A FR1255842A FR2992239A1 FR 2992239 A1 FR2992239 A1 FR 2992239A1 FR 1255842 A FR1255842 A FR 1255842A FR 1255842 A FR1255842 A FR 1255842A FR 2992239 A1 FR2992239 A1 FR 2992239A1
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France
Prior art keywords
plate
cap
22b
counter
form
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Granted
Application number
FR1255842A
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French (fr)
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FR2992239B1 (en
Inventor
Daniel Royer
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PSA Automobiles SA
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Peugeot Citroen Automobiles SA
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Priority to FR1255842A priority Critical patent/FR2992239B1/en
Publication of FR2992239A1 publication Critical patent/FR2992239A1/en
Application granted granted Critical
Publication of FR2992239B1 publication Critical patent/FR2992239B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00Flanging or other edge treatment, e.g. of tubes
    • B21D19/08Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/082Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles
    • B21D19/084Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles with linear cams, e.g. aerial cams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • B21D37/12Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies

Abstract

The method involves fixing a cap (18) on a mobile press plate, and checking parallelism of friction plates (22a, 22b) by displacement of the cap towards a counter mold (16) by utilizing the mobile press plate until an adjustment position. The friction plates are adjusted such that the friction plates are arranged in a parallel manner. The counter mold is slid in a sliding motion between a stamping position for stamping of a part i.e. cladding panel, to be pressed, and a retracted extraction position for extraction of the pressed part.

Description

The invention relates to a method for adjusting the parallelism of the friction plates of a counter-form of a stamping tool.

The invention aims in particular to apply in the field of stamping parts in press. Embossing is a shaping operation of a thin sheet which is commonly used in industry, particularly in the automotive industry to form including sheet metal parts, such as panels 10 for covering a motor vehicle . The stamping is carried out in press by means of a stamping tool comprising a lower part serving as a support for the part to be stamped and an upper mobile part which is carried by a plate driven in displacement by the press. The stamping operation is sometimes completed by at least one edge-cutting operation, which consists in reorienting peripheral zones of the part which have been stamped and which are situated in the extension of the main surfaces of the sheet. The edge-dropping operation makes it possible, in particular, to fold an edge of the part undercut, so that the edge is bent in a direction inclined towards the counter-form, with respect to the stamping axis which is generally vertical. For this purpose, the lower portion has at least one againstform which is designed to form the edge undercut. The counter-form is movably mounted relative to the lower cap, along a sliding axis, between a stamping position of the part, and a retracted position of extraction of said part in which the counter-form releases the edge. folded undercut. In a complementary manner, the stamping tool comprises a cap which is designed in particular for slidingly guiding the counterform. The cap comprises a first friction plate which cooperates with a second friction plate carried by the counter-form, the friction plates being arranged parallel to each other along the axis of sliding of the counter-shape to slide the counter-shape. form 35 with a substantially zero clearance.

For this purpose, the plate carried by the counter-form must extend parallel to the plate carried by the cap. However, the difficulty of access to the friction plates requires the use of a method of adjusting the parallelism of the plates using a traveling crane. This type of method consists in wearing the cap by means of the traveling crane, for example by means of slings. More particularly, the cap is driven in displacement towards the counter-form to a position of adjustment in which the first plate bears on the second plate, to visualize a possible lack of parallelism between the first plate and the second plate. . In addition, the method comprises a setting step which aims to arrange the first plate and the second plate in parallel with each other. A disadvantage of this type of overhead crane adjustment method is its low accuracy. Indeed, the cap suspended from the crane may swing, especially in contact with the counter-form, which can distort the parallelism control of the friction plates. In addition, the crane adjustment method requires the intervention of several operators, who may be injured by a possible swing of the suspended cap. In particular to overcome these disadvantages, the invention proposes a method for adjusting a stamping tool of the type comprising: a lower cap which is designed to support a stamping part and to cooperate with a complementary upper presser carried by a platen movably mounted on a press, according to a drawing axis, - at least one against-shape which is designed to form an undercut edge of the workpiece and which is slidably mounted along a sliding axis, between a stamping position of the workpiece, and a retracted retracted position of said workpiece; - a cap which is mounted on the stamping tool in a working position for slidingly guiding the counterform, and sliding guide means comprising a first friction plate carried by the cap and a second friction plate carried by the counter-form, said friction plates being arranged parallel to each other along the axis of sliding of the counter-form, for slidingly guiding the counter-form, characterized in that the method comprises: a step of fixing the cap on the movable platen of the press; a step of controlling the parallelism of said friction plates which is carried out by moving the cap towards the counter-form by means of the movable plate of the press, to a setting position, and - a setting step of at least one of said friction plates which aims to arrange the first plate parallel to the second plate. Thus, the method according to the invention can drive the cap moving up and down along a vertical axis, without risk of swinging or pivoting of the cap relative to its working position. In addition, the step of fixing the cap is carried out by means of a plurality of candles which connect the cap to a clamping plate mounted on the moving plate of the press. According to this characteristic, the cap is securely clamped on the plate of the press. According to another aspect, the step of controlling the parallelism comprises: a first phase consisting in coating the second friction plate with a coloring material, a second phase consisting in moving the capping by means of the movable platen of the press to its setting position in which the first plate bears against the second plate, so that the coloring agent impregnates at least a portion of the first friction plate, to visualize the lack of parallelism. In addition, the adjusting step is to grind the housing of the first plate impregnated with the coloring material during the preceding control step, so that the first plate is parallel to the second friction plate. Also, the method comprises a step of reassembly of the cap, which is carried out following the adjustment step and which consists in mounting the cap on the stamping tool in a working position in which the first plate cooperates with the second plate to guide the counter-form slidably. Similarly, the method comprises an additional step of setting which is carried out following the step of reassembly of the cap and which consists in making a shim interposed between the second friction plate and the associated counter-form so that that said friction plates make it possible to obtain a substantially zero clearance between the counterform and the cap during the sliding of the counterform. Finally, the wedging step includes a sizing phase of the wedge which consists in arranging a temporary wedge made of a moldable material, the temporary wedge being interposed between the second friction plate and the associated counter-form, to determine the thickness of the adjustment wedge to be made. This characteristic makes it possible to determine the thickness of the shim 15 although the location of the shim is not accessible directly during the sliding of the counter-form. Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings, in which: FIG. 1 is a side view in section, which illustrates a cap carrying a first friction plate and a sliding counter-form carrying a second friction plate of a stamping tool; FIG. 2 is a perspective view, which illustrates a step of controlling the parallelism of the friction plates made by displacing the cap towards the counter-form of FIG. 1, by means of the movable plate of the press, according to FIG. the invention. In the description and the claims, the terms "upper", "lower" and "low", "high" will be used in a nonlimiting manner with reference to the upper part and the lower part respectively of FIG. , to clarify the description and the claims, will be adopted without limitation the longitudinal, vertical and transverse terminology with reference to the trihedron L, V, T indicated in the figures. FIG. 1 shows partially a drawing tool 35 having a lower portion 12 which serves to support a stamping part (not shown), such as a sheet.

The lower portion 12 is designed to cooperate with an upper portion (not shown) which is carried by a movable plate 14 driven in displacement by a press from top to bottom along a vertical drawing axis B.

The plate 14 extends in a transverse plane perpendicular to the drawing axis B, as can be seen in FIG. 2. In addition, according to FIG. 1, the lower part 12 is equipped with a counterform. 16 which is designed to form an undercut edge of the stamping piece, for example.

For this purpose, the counter-form 16 is slidably mounted, along an axis A of sliding, between a stamping position of the workpiece, and a retracted position of extraction of the part to be stamped. In a complementary manner, the stamping tool 10 comprises a cap 18 which is mounted on the stamping tool 10 in a working position, shown in FIG. 1, for slidingly guiding the counterform 16 by the intermediate guide means. The sliding guide means comprise a first friction plate 22a carried by the cap 18 and a second friction plate 22b carried by the counterform 16. The friction plates 22a, 22b are arranged parallel to each other along the axis The invention relates to a method for permitting in particular the adjustment of the parallelism of the first plate 22a and the second plate 22b, relative to one another. to the other, along the sliding axis A of the counter-form 16. The adjustment method comprises a preliminary step of arranging the stamping tool 10 under the press, so that the lower cap 18 is arranged in line with the movable plate 14 of the press. In addition, the preliminary step comprises a phase of separation of the cap 18 of its support formed by the stamping tool 10. Following the preliminary step, the method comprises a step of fixing the cap 18 on the movable plate 14 of the press so that the cap 18 extends in a transverse plane parallel to the plane in which the cap 18 is arranged in its working position on the stamping tool 10, according to FIG. 2 For this purpose, the step of fastening the cap 18 is carried out by means of a plurality of candles 24, two of which are shown in Figure 2, which connect the cap 18 to a clamping plate 25 mounted on the movable platen 14 of the press. Each candle 24 is here a metal cylinder which extends vertically from the clamping plate 25 of the movable plate 14, to the cap 18, and which is fixed by screwing means of the screw nut type. In addition, the method comprises a step of controlling the parallelism of the friction plates 22a, 22b which is produced by moving the cap 18 towards the counterform 16 by means of the movable plate 14 of the press, along the axis B vertical stamping. The parallelism control step comprises a first phase 15 which consists of coating the second friction plate 22b against the counter-form 16 with a coloring material. The coloring material is a material designed to leave a mark when touched, such as chalk for example. In addition, the control step comprises a second phase which consists in moving the cap 18 in displacement by means of the movable plate 14 of the press, along the drawing axis B, to a setting position in which the first plate 22a carried by the cap 18 is in axial abutment, at least in part, against the second plate 22B carried by the counterform 16. Thus, the coloring agent deposited on the second plate 22b impregnates at least a part of the first friction plate 22a, this impregnated part making it possible to visualize a possible parallelism defect between the first plate 22a and the second plate 22b. Also, the method comprises a step of adjusting the second friction plate 22b which is made following the control step and which aims to arrange the second plate 22b parallel to the first plate 22a. The adjusting step here is to grind the housing of the first plate 22a impregnated with the coloring material during the preceding control step, until the first plate 22a is parallel to the second plate 22b.

However, without limitation, the adjustment step may be performed by any other means for the arrangement of the second plate 22b parallel to the first plate 22a. It is possible to have to repeat the control step and the adjustment step several times and successively, until the first plate 22a is parallel to the second plate 22b. Similarly, the method comprises a step of reassembling the cap 18, which is performed following the adjustment step and which consists in raising the cap 18 on the stamping tool 10 in a working position 10 shown in FIG. 1, in which the first plate 22a cooperates with the second plate 22b to slidably guide the counterform 16. In addition, the adjustment method comprises an additional stalling step which is performed following the step of reassembly and which consists in making a shim 26 of adjustment, shown in Figure 1.

The function of the adjustment shim 26 is to adjust the position of the second plate according to a setting axis C perpendicular to the sliding axis A, so that the clearance between the first plate 22a and the second friction plate 22b, and the clearance between the counter-form 16 and the cap 18, are substantially zero during the sliding of the counter-form 16.

For this purpose, the shim 26 is arranged in the housing of the plate 22b. The staggering step comprises a sizing phase of the shim 26 which consists in arranging a temporary shim (not shown) which is made of a moldable material, such as modeling clay for example. The temporary shim is interposed between the second friction plate 22b and the associated counter-form 16, then the counter-form 16 is slidably driven so that the first plate 22a carried by the cap 18 rubs against the second plate 22b, the first plate 22a compressing and deforming the temporary hold. Thus, the measurement of the thickness of the temporary shim makes it possible to determine the thickness of the final shim 26 making it possible to obtain zero clearance between the first plate 22a and the second plate 22b during the sliding of the counter-form. .

Claims (7)

  1. REVENDICATIONS1. Method for adjusting a type 5 stamping tool (10) comprising: - a lower part (12) which is designed to support a coin to be stamped and to cooperate with a complementary upper part carried by a plate (14) movably mounted on a press, along a drawing axis (B), at least one counter-form (16) which is designed to form an undercut edge of the workpiece and which is slidably mounted, a sliding axis (A) between a drawing position of the workpiece and a retracted position of extraction of said workpiece; - a workpiece (18) which is mounted on the press tool (10) in 15 a working position for slidingly guiding the counter-form (16), and - sliding guiding means comprising a first friction plate (22a) carried by the cap (18) and a second friction plate (22b) worn by the counter-form (16), said plates (22a, 22b) of friction etan t arranged parallel to each other along the sliding axis 20 (A) of the counter-form (16), for slidably guiding the counterform (16), characterized in that the method comprises: a step of fixing the the cap (18) on the moving plate (14) of the press, - a step of controlling the parallelism of said friction plates (22a, 22b) which is produced by driving the cap (18) in displacement towards the counter-form (16) by means of the movable platen (14) of the press, to a setting position, and - a step of adjusting at least one of said friction plates (22a, 22b) which aims at arranging the first plate (22a) parallel to the second plate (22b).
  2. 2. Method according to claim 1, characterized in that the step of fixing the cap (18) is performed by means of a plurality of candles (24) which connect the cap (18) to a plate (25) of clamping mounted on the moving plate (14) of the press.
  3. 3. Method according to any one of the preceding claims, characterized in that the parallelism control step comprises: - a first phase which consists in coating the second plate (22b) against the friction of the counter-form (16) with a coloring material, - a second phase consisting in moving the cap (18) in displacement by means of the movable plate (14) of the press until it reaches its adjustment position in which the first plate (22a) bears against the second plate (22b), so that the coloring agent impregnates at least a portion of the first friction plate (22a) to visualize the lack of parallelism.
  4. 4. Method according to any one of the preceding claims, characterized in that the adjusting step consists of grinding the housing of the first plate (22a) impregnated with the coloring material during the preceding control step, so the first plate (22a) is parallel to the second friction plate (22b).
  5. 5. Method according to any one of the preceding claims, characterized in that it comprises a step of reassembly of the cap (18), which is performed following the adjustment step and which consists in mounting the cap ( 18) on the drawing tool (10) in a working position 20 in which the first plate (22a) cooperates with the second plate (22b) to slidably guide the counter-form (16).
  6. 6. Method according to claim 5, characterized in that it comprises an additional step of setting which is carried out following the step of reassembly of the cap (18) and which consists in making a shim (26) of 25 adjustment interposed between the second friction plate (22b) and the associated counter-form (16) so that said friction plates (22a, 22b) make it possible to obtain a substantially zero clearance between the counter-form (16) and the cap (18) during the sliding of the counter-form (16).
  7. 7. Method according to claim 6, characterized in that the step 30 of wedging comprises a sizing phase of the wedge (26) which consists in arranging a temporary wedge made of a moldable material, the temporary wedge being interposed between the second friction plate (22b) and associated counter-form (16) for determining the thickness of the adjustment shim (26) to be made.
FR1255842A 2012-06-21 2012-06-21 Method for adjusting a stacking tool Active FR2992239B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1255842A FR2992239B1 (en) 2012-06-21 2012-06-21 Method for adjusting a stacking tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1255842A FR2992239B1 (en) 2012-06-21 2012-06-21 Method for adjusting a stacking tool

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FR2992239A1 true FR2992239A1 (en) 2013-12-27
FR2992239B1 FR2992239B1 (en) 2014-06-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1103319A1 (en) * 1999-11-15 2001-05-30 Umix Co., Ltd. Negative angle-forming die
WO2003068429A1 (en) * 2002-02-11 2003-08-21 Anchor Lamina, Inc. Press action simulator for aerial cam set up
FR2914571A1 (en) * 2007-04-04 2008-10-10 Peugeot Citroen Automobiles Sa Pressing die for bonnet of motor vehicle, has connection connecting slides in manner that vertical displacement of upper slide triggers horizontal displacement of lower slide against counter-form to realize setting operation to shape piece

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1103319A1 (en) * 1999-11-15 2001-05-30 Umix Co., Ltd. Negative angle-forming die
WO2003068429A1 (en) * 2002-02-11 2003-08-21 Anchor Lamina, Inc. Press action simulator for aerial cam set up
FR2914571A1 (en) * 2007-04-04 2008-10-10 Peugeot Citroen Automobiles Sa Pressing die for bonnet of motor vehicle, has connection connecting slides in manner that vertical displacement of upper slide triggers horizontal displacement of lower slide against counter-form to realize setting operation to shape piece

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