JP2010221228A - Apparatus for bending sheet metal production - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for bending sheet metal products, with which a bag-shaped bent part is accurately and easily formed. <P>SOLUTION: A die 25 for forming a second bent part 15b in the upper edge part of a side panel outer 1 is divided into the die body 35 and a slide die member 36 and a recessed portion 36a and a projecting portion 36b for forming the second bent part 15b are provided on the side of a slide die member 36. In this way, the second bent part 15b after forming is moved integrally together with the slide die member 36 without sticking to the shape or the like of the upper edge part of the side panel outer 1. By utilizing a gap formed between the side panel outer and the die body 35 by these movements, the side panel outer 1 is detached from the slide die member 36. Further, constitution by which the slide die member 36 is held slidably to the die body 35 is adapted. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  In particular, the present invention relates to a sheet metal article bending apparatus suitable for bending an edge portion or the like of a large sheet metal article such as a side panel outer of a vehicle into a bag shape.

  Conventionally, as a bending apparatus for forming a bag-shaped bending portion by winding an edge portion of a sheet metal inward when manufacturing a sheet metal article constituting a vehicle body such as a prototype vehicle or a small-volume production vehicle, for example, Patent Document 1 proposes a bending apparatus for forming a bag-shaped bending section on the upper edge of the side panel outer.

  This bending apparatus has a die for forming a bag-shaped bending portion on the upper edge of the side panel outer in cooperation with the punch, and this die is directed to the inside of the side panel outer to be processed. Thus, a recessed portion that is recessed and a protruding portion that is relatively protruded by the recessed portion are formed. Furthermore, the die is divided into a die body and three separate die members that are separable from the die body. The die body has a recess, and each separation die member has at least a protrusion. Part is formed. And in this bending apparatus, the mold release from the die body is realized by removing the molded side panel outer together with each separating die member.

JP 2008-73705 A

  However, when processing a long region from the front pillar to the trunk end along the upper edge of the side panel outer as in the technique disclosed in Patent Document 1 described above, each separation die member is also long. It becomes. Accordingly, when the separation die member is removed from the die body together with the side panel outer at the time of releasing as in the technique disclosed in Patent Document 1 described above, the handling is not easy, and the separation die member falls off the side panel outer. Etc.

  Moreover, the upper edge portion of the side panel outer is bent, for example, between the front pillar and the roof. Therefore, when releasing the side panel outer, it is necessary to consider the bent shape of the upper edge of the side panel outer. However, as in the technique of Patent Document 1 described above, the die body and the separation die member When the relationship is set, depending on the upper shape or the like of the side panel outer, the bending portion and the die body may interfere with each other at the time of mold release. And in order to avoid such interference, when twist etc. are added to the side panel outer at the time of mold release, there exists a possibility of causing the fall of shaping | molding quality, etc.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sheet metal article bending apparatus that can easily and accurately form a bag-shaped bending section.

  The present invention is arranged such that a die disposed inside an end portion of a sheet metal article to be bent, and a die that is movable forward and backward with respect to the die outside the sheet metal article, and is advanced to the die side. In a bending apparatus for a sheet metal article comprising a punch for forming a bag-shaped bending section by pressing an edge portion of the sheet metal article against a recess formed in the die, the die includes a die body and The slide die member is slidably held on the die body, and the recess portion and a part of the protrusion protruding from the recess portion are provided on the slide die member.

  According to the bending apparatus for sheet metal articles of the present invention, a bag-shaped bending portion can be easily formed with high accuracy.

Side view showing schematic configuration of side panel outer Fig. 1 is a cross-sectional view of the main part along the line II-II in Fig. 1 Plan view showing the schematic configuration of the bending machine Longitudinal longitudinal sectional view showing a schematic configuration of the bending apparatus Plan view showing the schematic configuration of the die Expanded sectional view showing the main part of the bending machine Cross-sectional perspective view showing the main part of the die Cross section showing the main part of the die Side view showing the main part of the die Explanation of operation of bending machine

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the code | symbol 1 shows the side panel outer for vehicles as an example of a sheet metal article. A roof rail portion 5 that is connected to the roof panel 3 is formed at a substantially central portion of the upper portion of the side panel outer 1. A front pillar portion 6 is formed in front of the roof rail portion 5 in the upper part of the side panel outer 1, and a hatchback opening edge portion 7 is formed in the rear of the roof rail portion 5. On the other hand, a side sill portion 8 to which a floor panel (not shown) is connected is formed at the lower portion of the side panel outer 1. Further, a center pillar portion 9 is installed between the roof rail portion 5 and the side sill portion 8, a front door opening portion 10 is formed on the front side of the center pillar portion 9, and a rear door opening portion 11 is formed on the rear side. Has been.

  For example, as shown in FIG. 2, the roof rail portion 5 is configured by a bending portion 15 formed on the upper edge portion of the side panel outer 1. The end portion of the side panel inner 2 and the end portion of the roof panel 3 are joined to the end portion of the roof rail portion 5.

  In this embodiment, the bending part 15 which comprises the roof rail part 5 grade | etc., Bends in the direction which bulges the upper edge part of the side panel outer 1 to a vehicle width direction outer side, for example, and is 1st bending part 15a. Then, the second bent portion 15b is formed by bending into a bag shape so that the end side of the first bent portion 15a is wound around the inner surface.

  Such molding for forming the upper edge portion of the side panel outer 1 into a bag shape (that is, molding of the second bending portion 15b) is realized by, for example, the bending device 20 shown in FIGS. .

  The bending apparatus 20 includes, for example, a die 25 and first to third punch driving devices 26A to 26C (hereinafter referred to as a die 25) on a base 21 that is a general-purpose adapter capable of arranging various members and devices at arbitrary positions. These are collectively referred to as a punch driving device 26), and the main part is configured. Here, the die 25 is positioned with respect to the base 21 via a positioning member such as a pin, and is connected via a coupler such as a bolt. Further, the punch driving device 26 is installed on the base 21 via the sub plate 22. The sub-plate 22 is positioned with respect to the base 21 via a positioning member such as a pin, and is coupled via a coupling tool such as a bolt. The punch driving device 26 is positioned with respect to the sub-plate 22 via a positioning member such as a key, and is coupled via a coupling tool such as a bolt.

  As shown in FIGS. 3 and 6, the side panel outer 1 after the first bent portion 15 a is formed on the upper edge is placed on the die 25 in a lying state. Therefore, for example, as shown in FIG. 5, the die 25 has an upper surface shape that substantially matches the upper shape of the side panel outer 1 (the shape of the roof rail portion 5, the front pillar portion 6, the hatchback opening edge portion 7, etc.). The first mounting portion 30 is provided on one side, and the second mounting portion 31 having an upper surface shape substantially matching the lower shape (side sill portion 8 or the like) of the side panel outer 1 is provided on the other side.

  As shown in FIG. 5, one side of the die 25 on which the first placement unit 30 is formed includes a die body 35 and first to third slide die members slidably held by the die body 35. 36A to 36C (hereinafter collectively referred to as a slide die member 36).

  In the present embodiment, these slide die members 36 are held so as to be slidable in the vertical direction along the side wall portion of the die body 35. For example, the first slide die member 36A mainly corresponds to the roof rail portion 5. The second slide die member 36B is disposed mainly at a position corresponding to the front pillar portion 6 and the third slide die member 36C is disposed mainly at a position corresponding to the hatchback opening edge portion 7. It is installed. As described above, in the present embodiment, the side panel outer 1 is placed in a state of being laid down on the die 25, and therefore the vertical direction in which the slide die member 36 slides is the same as that of the side panel outer 1. Match the vehicle width direction.

  In order to allow the slide die member 36 to slide in the up and down direction (up and down movement), as shown in FIGS. 6 to 9, the main part of the side wall of the die body 35 extends in the up and down direction. A plurality of sliding surfaces 35a are formed. On the other hand, leg portions 37 extending downward corresponding to the respective sliding surfaces 35 a are provided at the lower portion of the slide die member 36. These leg portions 37 are set so that a surface facing the die body 35 is a contact surface 37a that is slidably contacted with the slide surface 35a. Each leg portion 37 is provided with a slide long hole 37b extending in the vertical direction, and through a fastening bolt 38 that passes through the slide long hole 37b and is screwed into the die body 35. Each leg portion 37 is fastened to the die body 35. When the fastening bolts 38 are loosened, the slide die member 36 is allowed to move in the vertical direction along the slide long holes 37b.

  On the outer wall surface of the base portion of the slide die member 36 held by the die body 35, a recessed portion 36a is formed which is recessed toward the inner side of the side panel outer 1 (that is, the die body 35 side). In addition, the protrusions 36b raised from the depressions 36a form a series of protrusions with the protrusions 35b formed on the upper surface of the die body 35 in a state where the slide die member 36 is lowered to the lower retracted position ( For example, see FIG. These protrusions 36 b and 35 b are formed substantially following the shape of the first bending portion 15 a of the side panel outer 1, and thereby function as the first placement portion 30.

  Here, as shown in FIGS. 6 and 8, in the present embodiment, each sliding surface 35 a and each contact surface 37 a are set in parallel to the designed number line direction. That is, in order to facilitate the accuracy management of the die 25, the sliding surfaces 35a and the contact surfaces 37a are set in parallel to, for example, the number lines in the front-rear direction and the vehicle width direction in the vehicle body design. ing. Further, the sliding long hole 37b is also set, for example, in parallel to the number line in the vehicle width direction in the vehicle body design. Thereby, the slide direction of the slide die member 36 is set in parallel to the number line in the vehicle width direction in the vehicle body design, for example.

  Further, as shown in FIGS. 6 to 8, the inner surface of the slide die member 36 is offset outward with respect to each abutment surface 37a. It is opposed to 35 with a predetermined distance. Further, a notch 36c is provided on the inner surface of the tip end portion of the slide die member 36, and this notch portion 36c forms an inclined surface that is inclined obliquely upward toward the outside on the inner surface of the tip end portion of the slide die member 36. Has been.

  Further, as shown in FIG. 9, recesses 36d are formed at both lower ends of the first slide die member 36A, and these recesses 36d protrude from the lower portions of the second and third slide die members 36B and 36C. The convex part 36e is engaged. With these engagements, the first slide die member 36A can move up and down in conjunction with the up and down movement of the second and third slide die members 36B and 36C. Further, a hydraulic jack base 35c corresponding to the second and third slide die members 36B and 36C protrudes from the side wall portion of the die body 35. The hydraulic jack base 35c includes a slide die member. A hydraulic jack 39 for moving up and down 36 is provided.

  As shown in FIGS. 3 and 4, the first to third punch driving devices 26 </ b> A to 26 </ b> C are disposed at positions facing the first to third slide die members 36 </ b> A to 36 </ b> C, respectively. Each of these punch driving devices 26 includes a cylinder 45 in which a piston rod 45 a is directed to the die 25, a slider 46 is coupled to the tip of the piston rod 45 a, and a punch 47 is attached to the slider 46. The slider 46 is guided by the guide member 48 and can freely move forward and backward toward the die 25. The punch 47 moves forward and backward with respect to the die 25 by the expansion and contraction of the piston rod 45a.

  A convex portion 47a corresponding to the concave portion 36a of the slide die member 36 is formed at the tip portion of the punch 47, and this convex portion 47a is formed in the concave portion 36a when the slide die member 36 is in the lowered position. It is possible to invade. Here, an inclined surface 47 b is formed below the convex portion 47 a, and the inclined surface 47 b is set so as to be fitted to the upper end surface of the leg portion 37 provided on the slide die member 36. And when the convex part 47a penetrate | invades with respect to the hollow part 36a by fitting of this inclined surface 47b, the upward movement of the slide die member 36 is prohibited.

  Here, as shown in FIGS. 4 and 6, a metal pad 50 is disposed above the first placement portion 30 of the die 25. For example, the pad 50 is suspended from an elevating device 51 such as a chain block attached to a ceiling in a factory, and is moved up and down by the elevating device 51. And the pad 50 clamps the 1st bending process part 15a formed in the side panel outer 1 between the 1st mounting parts 30 at the time of a fall. At that time, in order to press the side panel outer 1 to the die 25 side by the pad 50, that is, to press the first bending portion 15 a to the first placement portion 30 side, the punch driving device 26 includes a pad A pressing device 55 for pressing 50 toward the die 25 is also provided.

  The pressing device 55 includes a cylinder 55a attached to a bracket 56 extending from the punch driving device, and a pressing member 55c attached to a piston rod 55b of the cylinder 55a. The pressing member 55c is a piston rod 55b. The pad 50 is pressed by the extending operation. In order to prevent this pressing from affecting the first bending portion 15a and the like, the expansion / contraction direction of the piston rod 55b is set, for example, in a substantially horizontal direction. That is, the portion and direction in which the pad 50 presses the side panel outer 1 against the protruding portion 36b due to the extension of the piston rod 55b is from the tip end portion of the slide die member 36 (more specifically, in the vicinity of the notch portion 36c). The offset position and direction are set.

  Next, molding of the second bending portion 15b using the bending apparatus 20 having the above-described configuration will be described.

  As shown in FIG. 10A, at the start of molding the second bending portion 15b, the slide die member 36 is lowered to the lower retracted position and fixed by fastening the fastening bolt 38. And on the 1st mounting part 30 formed with the protrusion part 35b of the die main body 35, and the protrusion part 36b of the slide die member 36, the 1st bending process part 15a formed in the side panel outer 1 is provided. It is placed. The first bending portion 15 a is sandwiched between the pad 50 lowered by the lifting device 51 and the first placement portion 30, and the pad 50 is pressed by the pressing member 55 c of the pressing device 55. Thus, it is pressed against the first placement unit 30 side.

  Then, as shown in FIG. 10B, the punch driving device 26 is operated and the piston rod 45 a is extended, so that the convex portion 47 a of the punch 47 enters the hollow portion 36 a of the slide die member 36. . Due to the intrusion of the convex portion 47a into the hollow portion 36a, the end portion side of the side panel outer 1 is bent into a bag shape so as to be wound inwardly, and the second portion is applied to the portion. A bent portion 15b is formed. In this case, when the inclined surface 47b formed in the lower part of the convex portion 47a is fitted to the upper end surface of the leg portion 37, the slide die member 36 is prohibited from moving upward. In addition, since the first bending portion 15 a is pressed toward the first placement portion 30 by the pad 50, the upper edge portion of the side panel outer 1 is held at an appropriate position with respect to the die 25. . As a result, the second bent portion 15b is accurately formed in the side panel outer 1.

  Thereafter, as shown in FIG. 10C, the punch driving device 26 is operated and the piston rod 45 a is contracted, whereby the convex portion 47 a of the punch 47 is retracted from the hollow portion 36 a of the slide die member 36. Further, the pressing member 55 c is retracted from the pressing position of the pad 50, and the pad 50 released from the pressing state is raised upward by the lifting device 51. Then, after each fastening bolt 38 is loosened, the slide die member 36 is raised upward by a hydraulic jack 39. As the slide die member 36 is raised, the side panel outer 1 is also raised, so that the first bent portion 15a of the side panel outer 1 reaches a position that avoids interference with the protruding portion 35b of the die body 35. Be raised. Thus, in this embodiment, the slide die member 36 also functions as a lifter that raises the side panel outer 1. In this case, the hollow portion 36a is provided in the slide die member 36, and the molded second bending portion 15b is raised integrally with the slide die member 36. Therefore, the side panel outer 1 is It is moved upward without any interference with the 25 side.

  Then, as shown in FIG. 10 (d), the side panel outer 1 is moved outward by utilizing the gap formed between the first processed portion 15 a and the slide die member 36 by raising the side panel outer 1. The second bent portion 15b is released with respect to the hollow portion 36a. In this case, the inner surface of the slide die member 36 is separated from the die body 35 by a predetermined distance due to the offset with respect to the abutting surface 37a, so that the stroke for sliding the side panel outer 1 outward is increased accordingly. It is possible to secure.

  Then, as shown in FIG. 10 (e), by moving the side panel outer 1 obliquely above the slide die member 36, the bending portion 15 is detached from the die 25 without interfering with the slide die member 36 and the like. (Release). In this case, since the inclined surface is formed on the inner surface of the tip end portion of the slide die member 36 by the notch 36c, the interference of the side panel outer 1 with the slide die member 36 is accurately avoided.

  According to such an embodiment, the die 25 for forming the second bent portion 15b on the upper edge of the side panel outer 1 is divided into the die body 35 and the slide die member 36, and the second bending is performed. The upper edge portion of the side panel outer 1 is provided by providing the hollow portion 36a for forming the processed portion 15b and a part of the protruding portion protruding from the hollow portion 36a (the protruding portion 36b) on the slide die member 36 side. The second bent portion 15b after molding can be moved integrally with the slide die member 36 without being limited by the shape or the like. Then, by using the gap formed between the slide die member 36 and the die main body 35 by the movement of the side panel outer 1, the side panel outer 1 is detached from the slide die member 36, thereby releasing the mold. Interference with the die 25 side can be accurately avoided, and a bag-like bent portion can be easily and accurately formed. In addition, by adopting a configuration in which the slide die member 36 is slidably held with respect to the die body 35, workability at the time of mold release can be further improved.

  In addition, in this embodiment, although an example in the case of shape | molding a bag-shaped bending process part in the upper edge part of a side panel outer was demonstrated, this invention is not limited to this, Other various sheet metal products Of course, it can also be applied to articles.

1 ... Side panel outer (sheet metal article)
DESCRIPTION OF SYMBOLS 2 ... Side panel inner 3 ... Roof panel 5 ... Roof rail part 6 ... Front pillar part 7 ... Hatchback opening edge part 8 ... Side sill part 9 ... Center pillar part 10 ... Front door opening part 11 ... Rear door opening part 15 ... Bending process part 15a ... 1st processing part 15b ... 2nd bending process part 20 ... Bending apparatus 21 ... Base plate 22 ... Subplate 25 ... Die 26 ... Punch drive device 30 ... 1st mounting part 31 ... 2nd mounting part 35 ... Die body 35a ... Each sliding surface 35b ... Projection 35c ... Hydraulic jack base 36 ... Slide die member 36A ... First slide die member 36B ... Second slide die member 36C ... Third slide die member 36a ... Depression 36b ... Projection 36c ... Notch 36d ... Recess 36e ... Protrusion 37 Leg part 37a ... Contact surface 37b ... Sliding long hole 38 ... Fastening bolt 39 ... Hydraulic jack 45 ... Cylinder 45a ... Piston rod 46 ... Slider 47 ... Punch 47a ... Convex part 47b ... Inclined surface 48 ... Guide member 50 ... Pad 51 Elevating device 55 ... Pressing device 55a ... Cylinder 55b ... Piston rod 55c ... Pressing member 56 ... Bracket

Claims (5)

A die arranged inside the end of the sheet metal article to be bent, and a die that is arranged so as to be movable forward and backward with respect to the die outside the sheet metal article, and formed on the die when advanced to the die side In a sheet metal article bending apparatus comprising a punch that presses an edge of the sheet metal article against the recessed portion to form a bag-shaped bending section,
The die has a die body and a slide die member slidably held on the die body,
A bending apparatus for a sheet metal article, wherein the hollow die and a part of a protruding portion protruding from the hollow are provided on the slide die member.   2. The apparatus for bending a sheet metal article according to claim 1, wherein a sliding direction of the slide die member with respect to the die body is set in parallel to a design line direction.   The bending apparatus for a sheet metal article according to claim 1 or 2, wherein the slide die member also serves as a lifter for releasing the sheet metal article from the die.   The sheet metal product according to any one of claims 1 to 3, wherein a notch for avoiding interference with the sheet metal article at the time of mold release is provided at a tip of the slide die member. Bending device for goods. Having a pad for pressing the sheet metal article to the protrusion on the die;
5. The sheet metal article bending apparatus according to claim 4, wherein the pad presses the sheet metal article at a portion on the protruding portion that is offset from the tip of the slide die member.

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