JP2006062460A - Blank material - Google Patents

Abstract

【Task】
Provided is a blank material which can give a degree of freedom of a processing portion, suppress an increase in weight as much as possible, and provide a desired rigidity.
[Solution]
The blank 10 is characterized in that a steel wire 12 is welded to the surface 11 a of the steel plate 11. According to the blank material 10, since the steel wire 12 is welded to the surface 11a and the steel plate 11 is reinforced, it is reinforced and joined on the surface where two metal bands are overlapped like a conventional blank material. In contrast, since the contact is made with a line, an effective rigidity can be imparted to an appropriate portion without causing a large increase in weight. Moreover, since it becomes the reinforcement | strengthening part of a line instead of a surface, the area | region which does not apply to this expands, and the freedom degree of various processes can be increased.
[Selection] Figure 1

Description

  The present invention relates to a blank material that is processed into a desired product and is partially reinforced.

2. Description of the Related Art Conventionally, for example, when forming a product constituting a car body of an automobile, it is known that partial reinforcement processing is performed in advance on the blank material. As an example of this, it is composed of two metal strips that are partly overlapped so that only one sheet on both sides in the width direction, and reinforcement joining so that the portions of the two metal strips that overlap each other are thick plates There is a blank material (see, for example, Patent Document 1). For example, the blank material is press-molded into a U-shaped product by bending both side portions made of a single metal band in the same direction. This product requires high rigidity in the center part with a long span, and lower rigidity may be required on both sides. ing.
Japanese Patent Laid-Open No. 2002-160020 (page 2-9, FIG. 1)

  However, in this blank material, it is not easy to form an overlapped portion formed by reinforcing and joining two metal bands into a complicated shape. Moreover, in the blank material, for example, it is not easy to perform trim processing, that is, finishing processing, and piercing processing, that is, drilling processing, and the like on the overlapping portion, and there is a possibility that cracks may occur in the peripheral portion of the processing portion. For this reason, in this kind of blank material, the place which can be shape | molded in a complicated shape, and the place which can perform trim processing, piercing, etc. are naturally restricted.

  Furthermore, since this blank material is formed by overlapping two metal bands on the surface, the blank material is also stacked outside a region requiring strength, and there is a problem that the weight increases more than necessary.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a blank material that can give a degree of freedom of processing points, suppress an increase in weight as much as possible, and provide desired rigidity.

  In order to solve the above-described problems, the blank according to the present invention is characterized in that a steel wire is welded to the surface of a steel plate.

  According to the blank material according to the present invention, the steel wire is reinforced by welding the steel wire to the surface, so that the two metal bands are reinforced and joined as in the conventional blank material. In contrast, since the contact is made with a line, an effective rigidity can be imparted to an appropriate portion without causing a large increase in weight. Moreover, since it becomes the reinforcement | strengthening part of a line instead of a surface, the area | region which does not apply to this expands, and the freedom degree of various processes can be increased.

  The present invention will be described in detail with reference to the embodiment shown in FIGS.

  FIG. 1 shows an embodiment of a blank 10 according to the present invention. The blank material 10 includes a steel plate 11 having a plate shape formed from a steel material, and a steel wire 12 having a wire shape formed from the steel material. In Example 1, the blank 10 is continuously or intermittently welded to the surface 11a of the steel plate 11 by welding so that the three steel wires 12 extend in parallel with the longitudinal direction of the steel plate 11 at intervals. It is fixed so that it closely adheres. In the first embodiment, the steel plate 11 has a rectangular plate shape, but may be a plate shape appropriately shaped according to the product to which the blank material 10 is applied. In Example 1, the steel wire 12 has a rectangular cross section (see FIG. 3) and is a high-strength steel wire made of 980 Mpa high-tensile steel. However, as long as the steel wire 12 can reinforce the steel plate 11, a material and intensity | strength can be suitably selected according to the product to which the blank material 10 is applied, or its reinforcement degree.

  Next, the manufacturing method of the blank material 10 is demonstrated using FIG. 2, FIG.

  In order to fix the three steel wires 12 to the steel plate 11, a seam welding apparatus 20 schematically shown in FIG. 2 is used. The seam welding apparatus 20 includes a feed shaft 21 and a take-up shaft 22 that are spaced apart and provided in parallel. Between the feed shaft 21 and the take-up shaft 22, two rod-shaped rollers 23 parallel to the two shafts 21, 22 and three pairs of roller electrodes 24 that are separated from each other on an axis parallel to the two shafts 21, 22. , 25 are provided as shafts (not shown). As shown in FIG. 3, the roller electrode 24 is formed with a groove 24b on its outer peripheral surface 24a that allows the steel wire 12 to be received.

  As shown in FIG. 2, a feed coil 26 formed by winding a strip-shaped steel plate 11 made of a steel material is mounted on the feed shaft 21. The front end of the steel plate 11 is pulled out from the feed coil 26, and is fed so as to be sandwiched between the rod-like rollers 23 with the three steel wires 12 drawn out from the coil (not shown) arranged on the surface 11a. Further, each steel wire 12 is engaged with each groove 24b (see FIG. 3), and is passed between the three pairs of roller electrodes 24, 25, mounted on the take-up shaft 22 and taken up. ing.

  In order to fix each steel wire 12 to the surface 11a of the steel plate 11, the seam welding apparatus 20 applies pressure to the steel plate 11 and each steel wire 12 that are overlapped by both roller electrodes 24 and 25, and both rollers While the electrodes 24 and 25 are rotated to feed the steel plate 11 and each steel wire 12, an electric current is intermittently passed between them. When an electric current flows between the steel plate 11 and each steel wire 12, the contact portion generates heat based on the metal resistance and the contact resistance, the contact portion melts, and a pressing force acts on the contact portion. The steel plate 11 and each steel wire 12 are welded. This welding point is formed continuously or intermittently by relatively adjusting the feed amount depending on the rotation speed of both roller electrodes 24 and 25 and the intermittent energization cycle by both roller electrodes 24 and 25. The As a result, each steel wire 12 is welded to be in close contact with the surface 11a of the steel plate 11 continuously or intermittently, and seam welded.

  The steel plate 11 to which the steel wires 12 are fixed is wound around a winding shaft 22 to form a combined body coil 27. In the coupled coil 27, each steel wire 12 has a convex portion on the surface 11a of the steel plate 11, and as is well known in the art, an insertion member (not shown) for absorbing this step is interposed. It has been rolled up. Various blanks 10 are manufactured by cutting the steel plate 11 from the combined coil 27 to a desired length, for example, to a length corresponding to a part constituting the vehicle body 30 described later.

  FIG. 4 schematically shows a part of the vehicle body 30 that defines the outer shape and the passenger compartment of the automobile.

  In the first embodiment, the blank material 10 is applied to a pillar reinforcement 34 that reinforces a center pillar 33 extending so as to partition both openings 31 and 32 provided on the side of the vehicle body 30 in order to attach a door (not shown). Is done.

  5 is an enlarged view of the vicinity of the center pillar 33, and FIG. 6 is a cross-sectional view taken along II-II in FIG. As shown in FIG. 6, the center pillar 33 is located on the outer side of the vehicle body 30 and forms an outer plate, and the inner center pillar 33a is located on the vehicle compartment side of the outer center pillar 33a and forms an inner plate. The pillar 33b is joined to each other at both ends along the extending direction, and a pillar reinforcement 34 is assembled to the vehicle compartment side of the outer center pillar 33a in a space formed between the outer and inner center pillars 33a and 33b. Has been. The pillar reinforcement 34 has a plurality of bent portions 34a so as to have a cross section substantially the same shape as the outer center pillar 33a, and is formed along the outer center pillar 33a in a space formed between the outer and inner center pillars 33a and 33b. In order to reinforce the outer center pillar 33a, it is joined to the outer center pillar 33a by spot welding or the like. In this joined state, the pillar reinforcement 34 is, for example, pressed from the blank 10 so that each steel wire 12 extends along the longitudinal direction of the pillar reinforcement 34 on the surface facing the inner center pillar 33b. It is molded by.

  In the vehicle body 30, for example, when a collision occurs from the side thereof, that is, the direction indicated by the arrow A in the drawing and the center pillar 33 is bent toward the vehicle interior, the same applies to the outer center pillar 33 a and the pillar reinforcement 34. A force that causes bending deformation acts. However, since each steel wire 12 showing a large resistance in the direction of stretching is fixed to the pillar reinforcement 34 on the surface facing the inner center pillar 33b, the pillar reinforcement 34 is easily bent and deformed. Absent. For this reason, the pillar reinforcement 34 formed from the blank 10 is enhanced in bending rigidity with respect to the force in the direction indicated by the arrow A by each steel wire 12.

  In the blank material 10 according to the present embodiment, the rigidity of the steel plate 11 is increased in advance by welding the steel wires 12 and is formed into a pillar reinforcement 34 having a desired rigidity only by performing press working. be able to.

  Moreover, in the blank material 10, since each steel wire 12 is welded only in the place which needs reinforcement, and the rigidity of the steel plate 11 is improved, the reinforcement joining was carried out by the partial overlapping surface by two metal strips. A reinforcing part is not provided in a wider area than necessary like a blank material. For this reason, compared with the conventional blank material, high intensity | strength can be acquired, without causing the moderate weight increase.

  In the blank material 10, a region that does not cover the reinforcing portion reinforced by each steel wire 12 in the steel plate 11, that is, a region constituted by only the steel plate 11, that is, a region that can be subjected to processing such as bending or drilling is expanded. , The degree of freedom of molding is increased.

  In the blank material 10, each steel wire 12 that reinforces the steel plate 11 can be fixed to a region of the surface 11 a of the steel plate 11 excluding the bent portion 34 a in the formed pillar reinforcement 34. For this reason, even if it is a product of a complicated shape in which a plurality of bent portions 34a are continuously provided, the blank material 10 in which the steel wire 12 is fixed to a region that does not cover the plurality of bent portions 34a in advance is used. Can be easily molded.

  When the blank material 10 as shown in FIG. 1 is used to form the pillar reinforcement 34 shown in FIG. 6, even if the force in the direction indicated by the arrow A in the drawing acts on the pillar reinforcement 34, the arrow A Since each steel wire 12 provided so as to be substantially orthogonal to the direction works in a direction to suppress bending deformation of the steel plate 11, the pillar reinforcement 34 is not easily deformed, and the rigidity of the center pillar 33 itself is also increased. ing.

  Therefore, according to the blank material 10 according to the present embodiment, it is possible to give a degree of freedom of processing points, suppress an increase in weight as much as possible, and impart desired rigidity.

  Next, Example 2 will be described. In the second embodiment, the blank 10 having the same structure as that manufactured by the same manufacturing method as that of the first embodiment is disposed below both openings 31 and 32 provided on the side of the vehicle body 30 as shown in FIG. This is an example applied to a sill reinforcement 36 that reinforces a sill 35 provided. Since the blank 10 of Example 2 has the same manufacturing method and configuration as Example 1, detailed description thereof is omitted.

  As shown in FIG. 7 which is a cross-sectional view taken along line III-III in FIG. 4, the sill 35 is located on the outer side of the vehicle body 30 and includes an outer sill 35a constituting the outer plate, and an inner plate. The inner sill 35b is joined to each other at both end portions along the extending direction, and a sill reinforcement 36 is assembled to the vehicle interior side of the outer sill 35a in a space formed between the outer and inner sills 35a and 35b. It is configured. The sill reinforcement 36 has a plurality of bent portions 36a so as to correspond to the shape of the outer sill 35a, and extends along the outer sill 35a in a space formed between the outer and inner sills 35a and 35b. In order to reinforce the outer sill 35a, it is joined by spot welding or the like. In this joined state, the sill reinforcement 36 is formed from the blank material 10 by, for example, pressing so that each steel wire 12 extends along the longitudinal direction of the sill reinforcement 36 on the surface facing the inner sill 35b. Molded.

  In the vehicle body 30, for example, when a collision is caused from the side, that is, the direction indicated by the arrow B in the drawing and an external force is applied to the sill 35 from the direction of the arrow B, a force that causes the outer sill 35 a and the inner sill 35 b to bend and deform. Works. However, since each steel wire 12 showing a large resistance to the stretching direction is fixed to the surface facing the inner sill 35b, the sill reinforcement 36 does not easily bend and deform. The rigidity of the sill 35 itself is also increased.

  In the blank 10 according to the second embodiment, since the steel wires 12 that reinforce the steel plate 11 are fixed to the surface 11a of the steel plate 11 in a region that does not cover the plurality of bent portions 36a in the sill reinforcement 36 after forming. The molding for applying to the sil reinforcement 4 having the bent portion 36a is facilitated, and a desired shape can be surely obtained.

  Therefore, in the blank material 10 according to the second embodiment, as in the blank material 10 of the first embodiment, it is possible to provide a degree of freedom of processing points and to provide effective rigidity without causing a significant increase in weight. .

  In both of the above-described embodiments, each steel wire 12 of the blank 10 was fixed to the surface 11a so as to extend in parallel with the extending direction of the steel plate 11, but as shown in FIG. The two steel wires 12 can be fixed to the surface 11a so that the positions when viewed in the width direction of the steel plate 11 are displaced. When such a blank 10 passes between the two pairs of roller electrodes 24, 25 of the seam welding device 20 through the stacked steel plate 11 and the two steel wires 12, two pairs of both roller electrodes 24 are used. In the state where the steel wire 12 is engaged with each of the grooves 24b and the two pairs of roller electrodes 24 and 25 are maintained in the mutually opposing relationship, the roller electrodes 24 and 25 are displaced along the width direction of the steel plate 11, respectively. Then, both steel wires 12 are seam welded and manufactured so as to extend while being displaced to a desired position on the surface 11a by the guide action of the groove 24b. The extending position of the steel wire 12 on the surface 11a can be adjusted by the feed amount depending on the rotational speed of the roller electrodes 24 and 25 and the displacement speed of the roller electrodes 24 and 25. When the roller electrodes 24 and 25 are displaced to desired positions on the surface 11a, the direction of the roller electrodes 24 and 25 with respect to the extending direction of the steel wire 11 is changed so as to correspond to the displacement amount. The extending direction of each steel wire 12 can be changed by the guide action, and it becomes easy to displace each steel wire 12 to a desired position. As shown in FIG. 10, for example, such a blank 10 avoids a portion where the pillar reinforcement 44 that reinforces the outer center pillar 33 a (see FIG. 6) is processed in the same manner as in the first embodiment. It is used when it is desired to displace the extending position of each steel wire 12 to a desired position so as to have strength. In order to manufacture the blank 10 as shown in FIG. 9, the steel plate 11 and both roller electrodes 24 and 25 only have to move relatively along the width direction of the steel plate 11 when seam welding is performed. For example, in the seam welding apparatus 20, both the roller electrodes 24 and 25 may be fixed, and the feed shaft 21 and the winding shaft 22 may be moved to change the extension direction of the steel wire 11.

  In both of the above-described embodiments, the steel wire 12 seam welded to the surface 11a in order to reinforce the steel plate 11 was formed so that the cross-section had a rectangular shape, but as shown in FIG. The cross section can be circular. Since the steel wire 12 having a circular cross section is more flexible than the steel wire 12 having a rectangular cross section, the steel wire 12 as shown in FIG. 11A is displaced to a desired position on the surface 11a. However, the extending blank material 10 'can be easily manufactured.

  In both of the above-described embodiments, in the blank material 10, the steel wire 12 for reinforcing the steel plate 11 extends along the longitudinal direction of the molded products 34 (see FIG. 5) and 36 (see FIG. 8). Although it was shape | molded so that it might exist, the example shape | molded so that it might extend in a different direction from this is shown in FIG. According to this, the pillar reinforcement 54 in which each steel wire 12 is orthogonal to the longitudinal direction of the product and is fixed so as not to be applied to the processing site can be formed by using the blank material 10. The pillar reinforcement 54 shows an example in which the blank 10 is applied to a part of the center pillar 33 (see FIG. 6), and rises from the both ends of the outer wall portion 54a and the outer wall portion 54a toward the passenger compartment. It has a pair of side wall parts 54b and 54c, and each steel wire 12 is being fixed to the inner surface of both side wall parts 54b and 54c so that it may extend along a vehicle width direction. When a force from the direction indicated by arrow C in FIG. 12 (vehicle side) acts on the center pillar 33 (see FIG. 6), the outer center pillar 33a, the pillar reinforcement 54, and the inner center pillar 33b that constitute the center pillar 33 are used. Tries to move toward the passenger compartment. However, since each steel wire 12 that is not easily deformed in the shrinking direction is fixed to the side wall portions 54b and 54c so as to be substantially parallel to the direction of the arrow C, the pillar reinforcement 54 has the arrow C The side wall portions 54b and 54c are not deformed so as to be easily crushed along the direction, and the rigidity of the center pillar 33 itself is enhanced. Moreover, in the pillar reinforcement 54, since it is sufficient that the side wall portions 54b and 54c are prevented from being crushed, each steel wire 12 may extend on the outer surface of the side wall portions 54b and 54c.

  In both of the above-described embodiments, the products 34 (see FIG. 5) and 36 (see FIG. 8) of the vehicle body 30 (see FIG. 4) molded from the blank material 10 were not subjected to piercing. However, for example, as shown in FIG. 13 representing a pillar reinforcement 64 similar to that of the first embodiment, an opening 64a as a hinge attachment hole can be provided by piercing. When applied to the pillar reinforcement 64, since the steel wire 12 that reinforces the steel plate 11 is fixed to the blank 10 in a region that does not cover the opening 64a in the pillar reinforcement 64 after forming, the opening 64a is formed. The piercing process is not disturbed by the steel wire 12.

  In both of the above-described embodiments, the blank material 10 is applied to the pillar reinforcement 34 that reinforces the center pillar 33 and the sill reinforcement 36 that reinforces the sill 35 of the vehicle body 30 (see FIG. 4). It can be applied to other parts constituting the vehicle body 30. Moreover, the blank material 10 may be applied to products other than the above-described example, and can also be applied to products other than the parts constituting the vehicle body 30.

  In the blank material 10 of both the above-described embodiments, the steel wire 12 is welded to the surface 11a of the steel plate 11 so as to be in close contact with the steel plate 11 continuously. In addition, since the rigidity of the blank material 10, that is, the reinforcing effect of the steel wire 12 on the steel plate 11 is enhanced when it is welded to the surface 11 a of the steel plate 11, it is desirable to perform seam welding so as to be in close contact with each other.

  In the blank material 10 of the above-described example, two, three, or six steel wires 12 are provided, but the number of the steel wires 12 can be appropriately changed according to the product to be applied. It is not limited to.

It is a perspective view which shows the blank material which concerns on this invention. It is the perspective view which showed typically the seam welding apparatus used for manufacture of the blank material which concerns on this invention. It is sectional drawing obtained along the II line | wire shown in FIG. It is the perspective view which showed typically a part of vehicle body which prescribes | regulates the external shape and compartment of a motor vehicle. It is the elements on larger scale which show the vicinity of the center pillar in FIG. It is sectional drawing obtained along the II-II line | wire shown in FIG. It is sectional drawing obtained along the III-III line | wire shown in FIG. It is a perspective view which shows the sill reinforcement shown in FIG. It is a perspective view which shows the example by which each steel wire was welded so that it might displace to the width direction of a steel plate in the blank material which concerns on this invention. It is the elements on larger scale which show the example which applied the blank material shown by FIG. 9 to the center pillar reinforcement similarly to FIG. It is a perspective view of the blank material which shows the example by which the steel wire formed in the circular cross section so that it may displace in the width direction of a steel plate was welded. It is sectional drawing obtained along the IV-IV line | wire shown to Fig.11 (a). It is a fragmentary perspective view which shows the example applied to the center pillar reinforcement to which the steel wire was fixed along the vehicle width direction. It is a fragmentary perspective view which shows the example in which the blank material to which the steel wire was fixed so that it may not apply to the process part after shaping | molding was applied to the center pillar reinforcement which has an opening part.

Explanation of symbols

10 blank material 11 steel plate 11a surface 12 steel wire 24 first roller electrode 25 second roller electrode 33 center pillars 34, 44, 54, 64 center pillar reinforcement 35 sill 36 (as a reinforcing member) sill (as a reinforcing member) Reinforce

Claims (9)

  A blank material in which a steel wire is welded to the surface of a steel plate.   The steel sheet is applied to a pillar or a sill, and the steel wire extends along a longitudinal direction of the pillar or the sill and is continuously welded to the surface. Blank material described in 1.   The blank material according to claim 2, wherein the steel wire is welded to the steel plate so as to avoid a region where an opening and a bent portion in the pillar or the sill are formed.   When an external force is applied to the steel plate used in the product, the steel wire extends so as to be substantially orthogonal to the input direction on a surface substantially orthogonal to the input direction of the external force, or substantially parallel to the input direction of the external force. The blank material according to claim 1, which extends substantially parallel to the input direction on the surface.   The steel plate is applied to a reinforcing member that joins end portions of an outer plate and an inner plate and has a space inside, and is assembled to the outer plate of the product, and the outer plate of the reinforcing member The blank material according to claim 4, wherein the steel wire extends on an opposite surface.   The steel plate is applied to a reinforcing member or the outer plate that is joined to the outer plate of the product that joins end portions of the outer plate and the inner plate and has a space inside, and the steel wire is 5. The reinforcing member extends on a surface facing or opposite to the outer plate, and the outer plate extends on a surface facing the reinforcing member. Blank material described in 1.   The blank material according to any one of claims 1 to 6, wherein the steel wire has a circular cross section.   A state in which a steel wire is engaged with the groove between a first roller electrode for seam welding in which a groove is formed on the outer peripheral surface and a second roller electrode having the outer peripheral surface disposed opposite to the first roller electrode. The steel wire and the steel plate are arranged so as to overlap each other, and the steel wire and the steel plate are seamed to the steel plate by applying pressure to the steel wire and the steel plate by the first roller electrode and the second roller electrode. A method for producing a blank material, characterized by welding.   The method for manufacturing a blank material according to claim 8, wherein the welding direction of seam welding is arbitrarily displaced in a state where the opposing relationship between the first roller electrode and the second roller electrode is maintained.

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