JP2556190B2 - Compound press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a compound press machine capable of simultaneously bending a sheet metal material and highly accurately processing a burring hole inclined with respect to the pressing direction.

<Prior Art> When attaching various interior materials of automobiles to vehicle body panels,
In order to simplify and speed up the work, various types of clips are frequently used instead of fasteners such as bolts and screws, and this tendency is being applied to heavy-weight seats and the like.

For example, as shown in FIG. 5 showing the appearance of a rear seat panel of a passenger car or the like to which a rear seat cushion or a rear seat back is fixed and FIG. 6 showing a sectional structure taken along the line VI-VI thereof, the rear seat panel 101 has a rear seat cushion. An elliptical seat cushion mounting hole 104 into which a striker 103 protruding from the bottom surface of the front end portion of 102 is inserted is formed. A clip holder 105 made of resin or the like is tightly fitted in the seat cushion mounting hole 104. A seat attaching / detaching clip 106 is fixed to the clip holder 105, and the lower end portion of the striker 103 is integrated. I keep it.

The seat attaching / detaching clip 106 is formed with an elastically deformable locking step portion 108 that can be locked to the burring portion 107 of the seat cushion mounting hole 104, and is provided at the front end portion of the seat attaching / detaching clip 106. By pulling the extracted pull-out knob 109 to the left in FIG. 6,
The locking step portion 108 is drawn into the clip holder 105, and the rear seat cushion 102 can be removed from the rear seat panel 101 together with the clip holder 105 and the seat attaching / detaching clip 106.

On the contrary, when the rear seat cushion 102 is attached to the rear seat panel 101, the clip holder 105 integrated with the rear seat cushion 102 is pushed into the seat cushion attachment hole 104 together with the seat attaching / detaching clip 106, and the seat attaching / detaching clip 106 is attached. The elastic step is used to engage the locking step portion 108 with the burring portion 107 of the seat cushion mounting hole 104.

When such a rear seat panel 101 is press-molded, the seat cushion mounting hole 104 and the clip holder 1
The accuracy of fitting with 05 and the strength of the burring portion 107 are particularly important. That is, seat cushion mounting holes
If the fitting precision between the 104 and the clip holder 105 is poor, the rear seat cushion 102 rattles against the rear seat panel 101. If the strength of the burring reinforcement 107 is not sufficient, the burring reinforcement 107 may be damaged by cracks or the like due to an impact such as a collision, and the rear seat cushion 102 may come off from the rear seat panel 101.

Therefore, it is necessary to set the molding direction of the burring reinforcement portion 107 formed in the seat cushion mounting hole 104 to be perpendicular to the rear seat panel 101, and the bending molding processing direction of the front vertical wall portion 110 of the rear seat cushion 102 and the like. If they do not match with each other, conventionally, a press device for bending work and a press device for burring reinforcement part work are used to perform the press work while changing the posture of the sheet metal material. That is, two press devices are arranged in series to perform bending and burring continuously.

<Problems to be Solved by the Invention> When performing bending and burring with high accuracy on one sheet metal material, the conventional one requires two pressing devices and, in addition, a work piece is placed between them. Since a transfer device for delivering and receiving must be included, the equipment cost increases and the area occupied by these increases, which may limit the flexibility of the factory layout.

<Object of the Invention> An object of the present invention is to provide a composite press machine capable of simultaneously performing a bending process and a highly accurate burring process on a sheet metal material with a single machine.

<Means for Solving the Problems> A compound press machine according to the present invention is a lower die holder on which a work is placed, and an upper die that opposes the lower die holder and can press the work with the lower die holder. A holder, a driving means for driving the upper mold holder relative to the lower mold holder in a direction in which they can move relative to each other, a molding die provided on the lower mold holder side, and a molding die facing the molding die. In a press device provided on the side of the upper die holder and having a forming punch capable of press-forming the work with the forming die, the apparatus is movably supported in a direction intersecting the facing direction with respect to the upper die holder. A burring cam worker, a burring punch protruding from the burring cam worker in an inclined state with respect to the facing direction, and a burring punch provided on the lower die holder side. A burring die capable of burring the work with, a guide surface formed on the burring cam worker and intersecting the moving direction of the burring cam worker, and parallel to the inclination direction of the burring punch, The guide surface is provided between the upper die holder and the burring cam worker and a reaction force receiving surface that is formed on the upper die holder so as to face the guide surface and is parallel to the facing direction. A pressing means for urging the force receiving surface side, and a driver provided on the lower die holder so that the guide surface and the reaction force receiving surface can slidably contact each other.

<Operation> When the upper die holder is brought closer to the lower die holder, which has a forming die and a burring die and on which a workpiece is placed, by the driving means, in the opposite direction, a forming punch provided on the upper die holder side. Presses the work with a molding die and press-molds it into a predetermined shape.

On the other hand, a guide surface formed on the burring cam worker and a reaction force receiving member formed on the upper die holder so as to face the guide surface are provided to the driver provided on the lower die holder as the upper die holder moves. As a result, the burring cam worker moves in a direction intersecting the facing direction with respect to the upper die holder as a result of sliding contact with the surface, so that the combined movement direction of the burring cam worker coincides with the protruding direction of the burring punch. As a result, the burring punch penetrates the work and penetrates into the burring die, and burring processing is performed on the work.

<Embodiment> FIGS. 1 to 4 showing a cross-sectional structure of an embodiment in which the composite press device according to the present invention is applied to a rear seat panel of a passenger car.
As shown in the figure, on a lower die holder 12 having a plurality of spool retainers 11 projecting vertically upward, a lower pad 13 slidably fitted to these sprue retainers 11 is provided. . Between the lower pad 13 and the lower die holder 12,
A plurality of compression springs 14 for biasing the lower pad 13 upward with respect to the lower die holder 12 are interposed, and the lower pad 13 is prevented from coming off from the spool retainer 11 by the spring force of these compression springs 14, A retaining stopper 15 is attached to the upper end of each spool retainer 11. Further, in order to restrict the lower end position of the lower pad 13 with respect to the lower die holder 12, several blocks with a bottom formed on the lower die holder 12 by hard rubber or the like that can abut the lower end surface of the lower pad 13. 16 is fixed.

Rear seat panel 17 that has been subjected to the first bending process
Is a lower pad 13 loaded by a transport device (not shown).
A part of the surface thereof has a shape corresponding to the rear seat panel 17, and a burring die 18 described later is fixed to a part thereof.

On the other hand, the upper die holder 19 facing the lower die holder 12 is provided with a plurality of spool retainers 20 protruding vertically downward, and these spool retainers 20 are provided with the lower pad.
An upper pad 21 having a shape corresponding to 13 and capable of pressing the rear seat panel 17 with the lower pad 13 is slidably fitted. Between the upper pad 21 and the upper die holder 19, a plurality of compression springs 22 for urging the upper pad 21 downward with respect to the upper die holder 19 are interposed. A stopper 23 is attached to the lower end of each spool retainer 20 to prevent the upper pad 21 from coming off from the spool retainer 20. Further, in order to regulate the rising end position of the upper pad 21 with respect to the upper die holder 19, the upper die holder 19 is provided with a plurality of blocks 24 with a bottom made of hard rubber or the like capable of contacting the upper end surface of the upper pad 21. Is fixed.

The spring force of the compression spring 14 on the lower die holder 12 side is set to be weaker than the spring force of the compression spring 22 on the upper die holder 19 side. Therefore, from the state shown in FIG.
As shown in FIG. 2, the lower pad 19 is moved downward while the space between the upper die holder 19 and the upper pad 21 remains unchanged.
21 and the lower pad 13 are brought into contact with each other, then the lower pad 13 is lowered together with the upper pad 21 with respect to the lower die holder 12, and after being brought into contact with the lower pad 13 bottomed block 16 as shown in FIG. The mold holder 19 descends with respect to the upper pad 21.

A molding die 25 for bending the front end portion of the rear seat panel 17 is held on the upper ends of a few die struts 26 projecting from the lower die holder 12 and penetrating the lower pad 13. The corresponding forming punch 27 of forming die 25 is the key
It is attached to the lower end of the upper die holder 19 via 28. A burring cam worker 30 having a burring punch 29 for processing an elliptical burring hole at a predetermined position of the rear seat panel 17 and protruding obliquely downward is positioned directly above the forming punch 27, and a pair of slides are provided. The motion guide plate 31 allows the upper die holder 19 to slide in the left-right direction in the drawing. Between the burring cam worker 30 and the upper die holder 19, a compression spring 33 that urges the burring cam worker 30 to the stopper block 32 side formed of hard rubber or the like mounted on the upper die holder 19 is interposed. It is equipped.

On the burring cam worker 30 on the opposite side of the burring punch 29 with the forming punch 27 interposed therebetween, a plane parallel to the moving direction of the burring cam worker 30 with respect to the upper die holder 19 and parallel to the protruding direction of the burring punch 29 is formed. A guide surface 34 that is perpendicular to the burring punch 29 and is parallel to the protruding direction of the burring punch 29 is formed. A sliding guide plate 35 with which the guide surface 34 can slidably contact is fixed to a side surface of a driver 36 on the opposite side of the burring die 18, and the driver 36 for driving the burring cam worker 30 is provided with the molding die 25. It is sandwiched between and is integrally formed with the lower pad 13 on the opposite side of the burring die 18. Also, burring die 18
A guide surface 37 that is parallel to the vertical direction of the upper die holder 19 is formed on the side surface of the driver 36 on the side facing the guide surface 37, and a slide guide plate 38 that slidably contacts the guide surface 37 is formed on the guide surface 34. It is fixed to the lower end portion of the upper pad 21 in a state of facing.

Therefore, when the guide surface 34 of the burring cam worker 30 starts to come into contact with the sliding guide plate 35 of the driver 36 as the upper die holder 19 descends, the sliding guide of the upper die holder 19 is already attached to the guide surface 37 of the driver 36. Since the plate 38 is in contact, the compression spring 33
The burring cam worker 30 starts to move to the right in the figure against the spring force of. As a result, as shown in FIG. 4, the burring punch 29 makes a synthetic movement in the projecting direction and bends the peripheral portion of the oval seat cushion mounting hole (not shown) formed in the rear seat panel 17 to bend the burring punch 29. The tip end fits into the punch receiving hole 39 formed in the burring die 18.

The tip of this burring punch 29 is the burring die 18
Prior to fitting into the punch receiving hole 39 formed in the
As shown in the figure, first, the front end of the rear seat panel 17 is pressed against the burring die 18 by the forming punch 27, and the front end of the rear seat panel 17 is press-molded into a predetermined shape. Then, the front end of the rear sheet panel 17 is pinched by the forming die 25 and the forming punch 27 in parallel with the above-described fitting operation of the leading end portion of the burring punch 29 into the punch receiving hole 39, and as shown in FIG. The front end of the panel 17 is press-molded into a predetermined shape.

In this embodiment, the lower die holder 12 and the lower pad 13 are divided so that they can be moved relative to each other, but they may be integrally connected. Similarly, the upper die holder 19 and the upper pad 21 are divided so that they can be relatively moved, but it is also possible to integrally connect them. Further, although the rear seat panel 17 is described in the present embodiment, it is needless to say that the present invention can be applied to other sheet metal materials in which the bending processing direction and the highly accurate burring processing direction are different. is there.

<Effects of the Invention> According to the composite pressing device of the present invention, the burring cam worker attached to the upper die holder is moved in the direction parallel to the protruding direction of the burring punch by the driver provided in the lower die holder. As a result, it is possible to process workpieces whose burring direction and bending direction are different at the same time with a single press machine, reducing equipment costs and occupying area compared to conventional ones. This has made it possible to significantly improve the degree of freedom in factory layout.

[Brief description of drawings]

1 to 4 are cross-sectional views showing a working procedure of an embodiment in which the composite press device according to the present invention is applied to a rear seat panel of a passenger car, and FIG. 5 shows an appearance of a rear seat panel which is a target of the present invention. FIG. 6 is a perspective view showing the same, and FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5 showing a schematic structure of a connecting portion between the rear seat panel and the rear seat cushion. In the figure, reference numeral 12 is a lower die holder, 13 is a lower pad, and 14, 2
2, 23 are compression springs, 17 is a rear floor panel, 18 is a burring die, 19 is an upper die holder, 21 is an upper pad, 25 is a forming die, 26 is a die support, 27 is a forming punch, 29 is a burring punch, and 30 is a Burring cam workers, 31, 35, 38 are sliding guide plates, 34, 37 are guide surfaces, 36 is a driver, and 39 is a punch receiving hole 39.

Claims (1)

(57) [Claims] 1. A lower die holder on which a work is placed, an upper die holder that opposes the lower die holder and can clamp the work by the lower die holder, and the upper die holder is the lower die holder. With respect to the lower die holder side, a molding die provided on the lower die holder side, and a molding die provided on the upper die holder side facing the forming die. In a pressing device having a forming punch capable of press-forming the work with a burring cam worker movably supported with respect to the upper die holder in a direction intersecting with the facing direction, and with respect to the facing direction. A burring punch projecting from the burring cam worker in an inclined state and a burring punch provided on the lower die holder side and capable of burring the work by the burring punch. B, a guide surface formed on the burring cam worker and intersecting the moving direction of the burring cam worker and parallel to the tilting direction of the burring punch; and the guide surface facing the guide surface. A pressing means that is provided between the upper die holder and the burring cam worker and is formed on the die holder and parallel to the facing direction, and urges the guide surface toward the reaction force receiving surface. And a driver provided on the lower die holder so that the guide surface and the reaction force receiving surface can slidably contact each other.