JP5962311B2 - Press type workpiece positioning device - Google Patents

Description

  The present invention relates to a press-type workpiece positioning apparatus, and more particularly to an apparatus for positioning a panel-shaped workpiece placed on a lower mold during flange bending.

  Patent Document 1 discloses an apparatus for positioning a panel-shaped workpiece to be put on a lower mold when drawing is not performed by flange bending but is performed by pressing. In addition, a so-called flange lifter that positions the panel-shaped workpiece placed on the lower mold during flange bending, and lifts the workpiece after flange bending by contacting the processed flange is patented. It is described in Document 2.

JP-A-4-274826 JP 2008-246571 A

  For example, when a flange is bent only on a specific part of the workpiece, not the entire circumference of the workpiece, and only the positioning function at the time of workpiece loading is required, the workpiece lift-up function after flange bending When the workpiece is not required, there is a demand to displace the positioning block that is directly involved in the positioning of the workpiece when the workpiece is loaded to a position that does not interfere with the flange portion that is processed as the flange bending progresses. For example, this corresponds to a case where the workpiece is preformed in a predetermined three-dimensional shape in advance, and a flange bending process is performed on a narrow and complicated portion of the workpiece. However, the techniques described in Patent Documents 1 and 2 cannot meet such a demand and still leave room for improvement.

  The present invention has been made paying attention to such a problem, and if the workpiece positioning function is achieved when the workpiece is loaded, the member directly involved in the workpiece positioning can be changed as the flange bending process proceeds. The present invention provides a press-type workpiece positioning device that can be displaced to a position that does not interfere with a processed flange portion.

  According to the present invention, a positioning gauge capable of swinging and displacing, which is in contact with a region to be a downward flange portion by flange bending processing of a workpiece put on a punch as a lower mold and manages positioning of the workpiece with respect to the punch, is provided. It is provided above. The positioning gauge comes into contact with a die that performs the flange bending process and swings and displaces to a position where it does not interfere with the flange part after the flange bending process as the flange bending process proceeds with the die.

  According to the present invention, by adopting the swing type positioning gauge, even if the flange forming part is a narrow part and a complicated part of the workpiece, it can be accurately positioned and subjected to flange bending. In addition, the positioning gauge is provided on the punch and swings and displaces to a position where it does not interfere with the flange part after flange bending as the flange bending process proceeds with the die. Therefore, there is no need to provide a space for moving the positioning gauge downward in the mold, and there is no need to worry about measures for strength of the mold. In addition, since the positioning gauge swings and displaces, the function as the positioning gauge is substantially lost, so that there is no problem in taking out the workpiece after bending the flange, for example.

It is a figure which shows an example of the panel-shaped workpiece | work used as the object of a flange bending process, and is schematic explanatory drawing of the front fender of a motor vehicle body. It is a figure which shows the structure of the press die which governs the flange bending process in the front fender of FIG. 1, and is expanded sectional explanatory drawing along the AA of FIG. The expanded perspective view of the principal part in the press die of FIG. The expansion perspective view which looked at the positioning gauge in FIG. 3 from the other side. The perspective view which shows the state by which the positioning gauge of FIG. 3 was pushed down. Operation | movement explanatory drawing of the positioning gauge shown to FIG.

  FIGS. 1-6 show the more concrete form for implementing the workpiece | work positioning device based on this invention, and especially FIG. 1 shows the schematic shape of the front fender 1 of the vehicle body as a panel-shaped workpiece | work used as a process target. 2 shows an enlarged cross-sectional view corresponding to the cross section taken along the line AA of FIG. 1, as a press die structure for bending the flange of the front fender 1 shown in FIG. Further, FIGS. 3 to 6 respectively show the detailed structure of the main part of FIG.

  A front fender (hereinafter referred to as “work”) 1 as a panel-like work shown in FIG. 1 includes an arch portion 2 of a wheel house in a drawing process (draw process) which is a previous process. The non-product part area that has been drawn into a predetermined three-dimensional shape and is inevitably generated and attached around the product part area at the time of the drawing process is already in the trimming process in the previous process. It is cut and removed as scrap.

  Further, as a special feature of the work 1 shown in FIG. 1, in order to receive a part of the headlamp unit that goes around to the work (front fender) 1 side after shaping the entire vehicle body, A groove-like cutout portion 3 is formed which is cut relatively deeply toward the rear side), and the upper top portion 4 and the lower top portion are substantially sandwiched between the tip portion of the work 1 and the cutout portion 3. 5 and bifurcated. And since it is necessary to attach the flange part 7 also to the part which faces the notch part 3 among the upper top part 4 and the lower top part 5 with the flange part 6 by the side of the arch part 2, in FIG. As a subsequent process of the drawing process and the trimming process, the flange part 7 is formed on a part of the upper top part 4 facing the notch part 3 and a part of the lower top part 5 facing the notch part 3, respectively. 1 shows an example of a press die.

  The press die 8 shown in FIG. 2 is formed of a lower die 9 and an upper die 10 that can be moved up and down and moves toward and away from the lower die 9. The lower die 9 is formed by a punch holder 11 and a punch 12 mounted thereon, whereas the upper die 10 is moved up and down by a sectional die 14 attached to the lower portion of the upper holder 13 and the upper holder 13. It is formed from a pad 15 which is elastically supported.

  Here, the lower portion of the overhanging portion 12a of the punch 12 in FIG. 2 is a gap portion 16 that is cut out relatively large due to restrictions on the mold structure, and the overhanging portion 12a is substantially the same as FIG. It has a shape that overhangs on the left side.

  As is well known, when the workpiece 1 to be processed is positioned on the punch 12, the upper mold 10 moves downward. As the upper die 10 is lowered, the pad 15 first comes into contact with the workpiece 1 on the punch 12 and stops at that position while being pressure-restrained between the punch 12 and the section 15 later than that. The die 14 still descends with the upper holder 13 and meshes with a part of the punch 12. In order for the punch 12 and the sectional die 14 to mesh with each other, a part of the peripheral edge of the work 1 is bent downward in a so-called flange-down manner, and the flange portions 6 and 7 shown in FIG. Will be.

  That is, as shown in FIG. 1, together with the flange portion 6 on the arch portion 2 side, flanges are respectively formed on a part of the upper top portion 4 facing the notch portion 3 and a portion of the lower top portion 5 facing the notch portion 3. The part 7 is bent. The details when these flange portions 7 are formed will be described later.

  Here, when the workpiece 1 drawn into a predetermined three-dimensional shape in the previous step as shown in FIG. 1 is placed on the lower mold 9 in FIG. On the other hand, the positioning is performed by a plurality of nest blocks (positioning blocks) for positioning (not shown), but the upper top portion 4 and the lower top portion 5 where the flange portion 7 is bent are also narrow portions. In addition, due to the complexity of the shape, it is necessary to perform some positioning uniquely.

  Therefore, in the present embodiment, a movable positioning gauge 17 is provided as a workpiece positioning device in a portion corresponding to the notch 3 in the punch 12 constituting the lower mold 9.

  As described above, FIG. 2 shows an enlarged cross-sectional view of the press die cut along the line AA passing through the notch 3 of FIG. 1, and FIG. 3 further shows the punch 12 shown in FIG. The principal part perspective view of the part corresponded to the notch part 3 of FIG. 1 is shown.

  As shown in FIG. 3, a concave portion 18 having a wedge shape in a plan view corresponding to the cutout portion 3 of FIG. 1 is formed on the upper surface of the punch 12, and an edge portion that is one ridge line in the concave portion 18. 1a corresponds to the edge 4a facing the notch 3 in the upper top part 4 of FIG. 1 and the root part of the flange part 7, and the edge part 18b which is the other ridge line is the lower top part 5 of FIG. Among them, it coincides with the root portion of the flange portion 7 facing the notch portion 3.

  A lower engraved portion 19 is provided at the bottom of the recessed portion 18 in FIG. 3, and a rectangular mounting bracket 20 formed by projecting a pair of leg portions 21 so as to face each other is bolted to the engraved portion 19. 22 is fixed. Then, a substantially rectangular rod-shaped positioning gauge 17 is inserted between a pair of opposed leg portions 21 and 21, and a pin 23 penetrating the pair of leg portions 21 and the positioning gauge 17 is driven into the positioning gauge 17. The leg 21 is supported so as to be swingable. Further, a compression coil spring 24 as an elastic means is interposed between the mounting bracket 20 and the positioning gauge 17, and the positioning gauge 17 is always urged upward by the elastic force of the compression coil spring 24. . The means for biasing the positioning gauge 17 is not necessarily limited to the compression coil spring 24, and the positioning gauge may be biased by, for example, urethane rubber or a weight having a predetermined mass.

  The positioning gauge 17 is arranged at a predetermined distance from the vertical wall 18c including the edge 18b in the recessed portion 18 of FIG. 3, and a small portion is cut off by rear-cutting the rear portion of the rectangular rod-shaped main body 17a. The strip 17b is inserted between the pair of legs 21 described above and supported by the pin 23. Further, the lower surface of the strip portion 17b is an inclined stopper surface 17c as shown in FIG. 6, and the stopper surface 17c of the positioning gauge 17 urged upward by the compression coil spring 24 contacts the mounting bracket 20. The maximum rising position of the positioning gauge 17 is regulated by contact. As is clear from FIG. 3, the positioning gauge 17 is disposed so as to be parallel to the vertical wall surface 18c in plan view, and the positioning gauge 17 can be set by arbitrarily setting the inclination angle of the stopper surface 17c. It is possible to adjust the 17 highest positions.

  Further, a positioning convex portion 25 is formed at the tip of the main body portion 17 a in the positioning gauge 17. FIG. 4 shows a view of the positioning gauge 17 shown in FIG. 3 from the opposite direction. As is clear from FIGS. 3 and 4, the tip surface of the main body portion 17a including the positioning convex portion 25 is circular. It is finished as an arc-shaped smooth curved surface portion 26. 3 shows a state in which the positioning gauge 17 is pushed up by the compression coil spring 24, whereas FIG. 4 shows a state in which the positioning gauge 17 is pushed down by the sectional die 14 as will be described later. ing.

  2 and 3, when the workpiece 1 is put on the punch 12, the edge of the region to be the flange portion 7 facing the notch portion 3 of the lower top portion 5 of FIG. The positioning gauge 17 is positioned in contact with the side surface of the positioning convex portion 25. Further, when the upper die 10 of FIG. 2 is lowered and the workpiece 1 is pressure-constrained by the pad 15, the positioning gauge 17 does not need the function, and as shown in FIG. 2 is pushed down by the sectional die 14 of FIG.

  That is, as shown in FIGS. 3 and 4, the positioning gauge 17 controls the positioning of the work 1 with respect to the support portion by the pin 23, and the positioning convex portion 25 that becomes the abutting portion of the sectional die 14 is the longitudinal direction of the main body portion 17 a. Offset in direction. Thereby, even if the position on the workpiece 1 side to be positioned by the positioning gauge 17 and the supporting portion of the positioning gauge 17 itself are separated by a predetermined distance, the intended purpose can be achieved. Further, since the tip end surface of the main body portion 17a in the positioning gauge 17 is an arc-shaped smooth curved surface portion 26, the shape of the lower surface of the sectional die 14 that comes into contact with the positioning gauge 17 does not necessarily have to be a horizontal plane. It will be.

  Therefore, according to the press die structure configured in this way, the workpiece 1 shown in FIG. 1, that is, the arch portion 2 shown in FIG. When the workpiece 1 in which the upper top portion 4 and the lower top portion 5 side flange portion 7 are not formed is inserted in addition to the side flange portion 6, the positioning gauge shown in FIG. 17, the workpiece 1 is positioned with respect to the punch 12.

  Regarding the positioning function of the workpiece 1 by the positioning gauge 17, the positioning gauge 17 is raised as shown in FIGS. 3 and 6A when the upper mold 10 shown in FIG. 2 is not lowered. From the positioning gauge 17, the edge of the region to be the flange portion 7 on the side of the lower top portion 5 that faces the notch portion 3 of FIG. The positioning is performed by contacting the side surface of the positioning projection 25.

  Subsequently, the upper die 10 in FIG. 2 is lowered, and the pad 15 first comes into contact with the work 1 and is pressed and restrained between the work 1 and the punch 12. Further, the pad 15 comes into contact with the work 1. Since the sectional die 14 meshes with the edge portions 18a and 18b (see FIG. 3) of the punch 12 later, as shown in FIG. 5 and FIG. 6 (B), the upper top portion 4 and the lower top portion. 5, the flange portion 7 is bent in a so-called flange-down manner at a portion facing the notch portion 3.

  Here, as shown in FIG. 3 and FIG. 6A, the positioning convex portion 25 in which the edge of the region to be the flange portion 7 on the lower top portion 5 side becomes the positioning reference surface of the positioning gauge 17. Even if the positioning is performed in advance by abutting on the side surface, if the work 1 is pressed and restrained by the pad 15 of FIG. 2, the positioning gauge 17 does not need the function.

  5 and 6B, in the process in which the sectional die 14 is engaged with the edge portions 18a and 18b of the punch 12 and the bending of the flange portion 7 proceeds, the lower surface of the sectional die 14 is The positioning gauge 17 is pressed down against the spring force of the compression coil spring 24 until it comes into contact with the positioning gauge 17 and does not interfere with the flange 7 where the molding proceeds. Since the tip end surface of the positioning gauge 17 on which the sectional die 14 comes into contact is formed as an arc-shaped smooth curved surface portion 26, the positioning gauge 17 smoothly follows the movement of the sectional die 14.

  When the upper die 10 starts to rise again after the molding of the flange portion 7 is completed, the sectional die 14 first rises and then the pad 15 rises and separates from the work 1, but follows the movement of the sectional die 14. Then, the positioning gauge 17 is also raised by the spring force of the compression coil spring 24, and returns to the initial state as shown in FIG. 3 and FIG. In this case, the flange portion 7 just formed is in close contact with the vertical wall surface 18c of the recessed portion 18 as shown in FIG. 5, and a predetermined gap G is secured between the flange portion 7 and the positioning gauge 17 as shown in FIG. There is no interference with the positioning gauge 17 that moves up following the sectional die 14.

  As described above, according to the present embodiment, the flange portion 7 is bent and formed at a narrow and complicated portion of the workpiece 1, that is, a portion of the upper top portion 4 and the lower top portion 5 that faces the cutout portion 3. In this case, by using the swing type positioning gauge 17, the part can be accurately positioned, which can contribute to the improvement of the molding quality.

  Further, since the positioning gauge 17 does not interfere with the flange portion 7 after the flange bending process as the flange bending process proceeds, the function as the positioning gauge 17 is substantially lost. There will be no trouble in taking out the workpiece.

  Furthermore, as shown in FIG. 3, even if the positioning position of the positioning gauge 17 is the recessed portion 18 corresponding to the notch 3 on the workpiece 1 side, the positioning gauge 17 can be installed without difficulty, and as shown in FIG. There is an advantage that the strength of the punch 12 can be secured even when the space 16 is below the installation position 17.

1 ... Front fender (Panel-shaped workpiece)
DESCRIPTION OF SYMBOLS 7 ... Flange part 9 ... Lower mold | type 10 ... Upper mold | type 12 ... Punch 14 ... Sectional die 15 ... Pad 17 ... Positioning gauge 23 ... Pin 24 ... Compression coil spring (elastic means)

Claims (5)

When the panel-shaped workpiece positioned on the punch as the lower die is pressed and restrained with a pad, the workpiece is subjected to flange bending by the cooperation of the die and the punch constituting the upper die together with the pad. An apparatus for positioning a workpiece put on the punch,
A positioning gauge is provided on the punch that can swing and displace to contact the region to be the downward flange portion of the workpiece by bending the flange to control the positioning of the workpiece with respect to the punch.
The positioning gauge is configured to come into contact with a die that performs flange bending and swings and displaces to a position where it does not interfere with the flange portion after flange bending as the flange bending process proceeds with the die. Press type workpiece positioning device.   2. The press die according to claim 1, wherein the positioning gauge abuts against an end surface of a region to be a downward flange portion of the workpiece by bending the flange and controls positioning of the workpiece with respect to the punch. Work positioning device.   The positioning gauge is supported so as to be swingable with respect to the lower die via a pin, and is biased upward, and further pushed down by a die that abuts against the tip against this biasing force. The press-type workpiece positioning device according to claim 2, wherein the workpiece is oscillated and displaced to a position where it does not interfere with the flange portion after the flange bending.   4. The press type work positioning apparatus according to claim 3, wherein the means for applying a biasing force to the positioning gauge is an elastic means.   5. The press-type workpiece positioning apparatus according to claim 1, wherein the workpiece is pre-formed into a three-dimensional shape.

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