JP5585103B2 - Framework member and method of manufacturing the framework member - Google Patents

Description

  The present invention relates to a frame member such as a pillar used in a vehicle or the like and a method for manufacturing the frame member.

  BACKGROUND ART A skeleton member in a vehicle, for example, a pillar, is known that includes a pillar reinforcing structure in which a pillar rein hose is provided in order to prevent deformation during a collision (see, for example, Patent Document 1). In this pillar reinforcing structure, a pillar rein hose is disposed inside a pillar outer that needs reinforcement to prevent the pillar from being deformed.

JP 2002-347655 A

  However, in the pillar reinforcing structure disclosed in Patent Document 1, the pillar is reinforced by increasing the strength of the pillar by providing a pillar rein hose in a portion where the pillar needs to be reinforced. For this reason, there is a problem that the weight of the pillar rein hose becomes a part of the weight of the pillar, which may hinder the weight reduction of the entire pillar.

  Then, the subject of this invention is providing the manufacturing method of the skeleton member which can reinforce the predetermined position of the skeleton member which needs reinforcement, without preventing the weight reduction of the whole skeleton member.

The skeletal member according to the present invention that has solved the above problems is a skeletal member that includes a reinforcing portion and is formed by pressing the skeleton member material. In addition, when the skeleton member skeleton member material is pressed, the skeleton member uneven portion is compressed to increase the plate thickness to form the skeleton member reinforcing portion, and the reinforcing portion has a plurality of protrusions alternately. It is characterized by having a formed shape .

In addition, the skeleton member according to the present invention that has solved the above problems is a skeleton member that is formed by pressing a skeleton member material with a reinforcing portion, and forms a microbead at a portion to be reinforced in the skeleton member material. When the skeleton member material is pressed, the microbead is crushed and the plate thickness is increased to form a reinforcing portion, and the reinforcing portion has a shape in which a plurality of protrusions are alternately formed. It is characterized by being.

Here, the microbead can be in an aspect in which a plurality of protrusions having a thickness smaller than that of the protrusions are arranged in parallel to each other.

  Moreover, the micro bead can be made into the aspect spaced apart along the direction which cross | intersects the longitudinal direction of a frame member raw material.

On the other hand, the manufacturing method of a skeleton member according to the present invention that solves the above-described problem is a manufacturing method of a skeleton member that includes a reinforcing portion and is formed by pressing a skeleton member material. By forming concavo-convex portions at the locations and pressing the skeleton member material, the concavo-convex portions are compressed to increase the plate thickness to form the reinforced portions, and the reinforced portions are formed with multiple ridges alternately It is characterized by having a shaped shape .

Further, the manufacturing method of the skeleton member according to the present invention that solves the above-described problems is a manufacturing method of a skeleton member that includes a reinforcing portion and is formed by pressing the skeleton member material, and is to be reinforced in the skeleton member material By forming a microbead at a location and pressing the skeleton member material, the microbead is crushed to increase the plate thickness, thereby forming a reinforcing portion. The reinforcing portion is formed with a plurality of ridges alternately. It is characterized by its shape .

  According to the skeleton member and the manufacturing method of the skeleton member according to the present invention, it is possible to reinforce a predetermined position of the skeleton member that needs reinforcement without hindering weight reduction of the entire skeleton member.

(A) is a perspective view of the pillar which concerns on this invention, (b) is the sectional view on the AA line of (a). (A) is a perspective view of the pillar raw material used when manufacturing the pillar which concerns on this invention, (b) is a BB sectional drawing of (b). It is process drawing which shows the process of pressing a pillar raw material and manufacturing a pillar. (A) is an expanded sectional side view of the micro bead in a pillar raw material, (b) is an expanded sectional side view of the micro bead in a pillar. (A) (b) is a perspective view which shows the other example of the pillar which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For the convenience of illustration, the dimensional ratios in the drawings do not necessarily match those described.

  Fig.1 (a) is a perspective view of the pillar which concerns on this invention, (b) is the sectional view on the AA line of (a). Moreover, Fig.2 (a) is a perspective view of the pillar raw material used when manufacturing the pillar which concerns on this invention, (b) is the BB sectional drawing of (b).

  As shown in FIG. 1A, a pillar 1 that is a skeleton member includes a pillar body 10 that extends in the vertical direction. An upper end side bracket 20 to be joined to the roof side rail is formed at the upper end portion of the pillar body 10. Furthermore, the lower end side bracket 30 joined to the rocker is formed in the lower end part of the pillar main body 10. The pillar 1 is used for a center pillar in a vehicle.

  The pillar body 10 in the pillar 1 includes a back plate 11, a right side plate 12, and a left side plate 13. The right side plate 12 and the left side plate 13 are connected via the back plate 11, and the pillar body 10 has a substantially U-shaped cross section. Further, flanges 14 and 15 are formed on the right side plate 12 and the left side plate 13 respectively. Further, the upper part of the back plate 11 is formed narrower than the lower part of the back plate 11.

  Furthermore, the back plate 11 has a curved shape in which a substantially central portion in the height direction protrudes outward, and a reinforcing portion 15 is formed above the protruding portion. The reinforcing portion 15 is formed along the longitudinal direction of the back plate 11. The reinforcing portion 15 is formed in the vicinity of the so-called belt line from the center position in the longitudinal direction of the back plate 11 which is the maximum load input portion in the center pillar, and is formed so as to include substantially the entire width of the back plate 11. The shape of the reinforcing portion 15 when viewed from the front is a substantially oval shape.

  The reinforcing portion 15 has a shape in which a plurality of protrusions are alternately formed. These ridges are formed along the longitudinal direction of the back plate 11. For this reason, the cross section of the reinforcement part 15 has comprised the shape in which the several uneven | corrugated | grooved part was formed alternately as shown in FIG.1 (b). Further, the thickness of the reinforcing portion 15 in the back plate 11 is formed to be thicker than other portions in the back plate 11.

  A pillar 1 shown in FIG. 1A is formed by pressing a pillar material 2 which is a skeleton member material of the present invention shown in FIG. As shown in FIG. 2A, the pillar material 2 is a flat plate material, and has a shape close to the shape in which the pillar main body 10, the upper end side bracket 20, and the lower end side bracket 30 are developed.

  Further, a microbead 3 serving as a concavo-convex portion is formed at a substantially central portion in the length direction of the pillar material 2. As shown in FIG. 2B, the microbead 3 has a wavy shape in which a plurality of concave and convex portions are alternately formed, and a plurality of protrusions are arranged in parallel to each other. As described above, the micro beads 3 are formed so as to be separated from each other in a direction orthogonal to the longitudinal direction of the pillar material 2.

  Here, the depth of the concavo-convex portion in the microbead 3 is approximately the same as the thickness of the pillar material 2. Moreover, the width | variety between the adjacent recessed part and convex part in uneven | corrugated shape is wider than the width | variety of the reinforcement part shown in FIG.1 (b). The thickness of the microbead 3 is increased by compressing the portion of the pillar material 2 that becomes the back plate 11 after molding.

  When manufacturing the pillar 1, a blanking (punching) process and a hot press process are performed. The pillar material 2 is formed by external cutting in a blanking process performed as a pre-process of the hot press process. In this blanking step, the microbead 3 is formed at a predetermined position in the pillar material 2.

  Next, a manufacturing procedure of the pillar according to the present embodiment will be described. FIG. 3 is a process diagram illustrating a process of manufacturing the pillar according to the present embodiment. When manufacturing a pillar, in a blanking process, the shape used as a pillar raw material is punched out from a base material board, and the pillar raw material 2 is acquired as shown to Fig.3 (a). After the pillar material 2 is punched out, a pressing process is performed on the position where the reinforcing portion is formed, thereby forming the reinforcing portion. The pillar 1 is manufactured by subjecting the pillar material 2 to hot pressing in a hot pressing step.

  When hot pressing is performed on the pillar material 2, hot stamping using a mold including a male die 51 and a female die 52 is performed as shown in FIG. Here, the pillar material 2 is disposed between the male mold 51 and the female mold 52, and the male mold 51 is pushed into the female mold 52 to perform molding. At this time, the part which becomes the back plate 11 after molding in the pillar material 2 is given a force to compress from above the portion which becomes the back plate 11 after molding in the pillar material 2. Here, the compression direction when compressing the portion to be the back plate 11 is a crossing direction such as orthogonal to an axis orthogonal to the portion to be the back plate 11. Moreover, it becomes the protrusion direction of a convex part when an unevenness | corrugation is formed. Moreover, it is in the state restrained with the metal mold | die with respect to the width direction of the part used as the backplate 11. FIG.

  FIG. 4A shows an enlarged side sectional view of the microbead in the pillar material. In this state, the thickness of the microbead 3 is approximately the same as the thickness of the pillar material 2. If the force which compresses the part used as the backplate 11 after shaping | molding in the pillar raw material 2 in this state is given, the micro bead 3 will try to extend in the width direction of the part used as the backplate 11. FIG. However, since the microbead 3 is constrained with respect to the width direction of the portion that becomes the back plate 11, as shown by the solid line in FIG. And the thickness of the microbead 3 is increased. In addition, the shape of the micro bead 3 before giving the force to compress in FIG.4 (b) is shown with the broken line.

  In this way, when pressing is performed, by applying a compressive force to the portion that becomes the back plate 11 after forming in the pillar material 2, the thickness of the microbead can be increased and the reinforcing portion 15 can be formed. . Further, by increasing the thickness of the reinforcing portion 15, the reinforcing portion 15 is made thicker than other portions of the back plate 11, and the bending buckling strength of the reinforcing portion 15 can be improved accordingly.

  Further, the bending buckling strength of the reinforcing portion 15 is improved by forming the micro beads 3 on the pillar material 2. For this reason, it is not necessary to provide a reinforcing member separately. Therefore, the reinforcement part 15 can be reinforced without preventing the weight reduction of the whole skeleton member. Moreover, the microbeads 3 are formed so as to be separated from each other along a direction orthogonal to the longitudinal direction of the pillar material 2. For this reason, the balance between strength and rigidity when the pillar material 2 is compressed can be optimized. Therefore, the deformation at the time of pressing can be distributed in a balanced manner throughout the pillar material 2. Therefore, the amount of change of the pillar material 2 can be reduced.

  When the press working is thus completed, the manufacture of the pillar 1 is completed as shown in FIG. Here, the back plate 11 of the pillar 1 can be in a state in which the reinforcing portion 15 is formed.

  Thus, according to the pillar 1 and the method for manufacturing the pillar 1 according to the present embodiment, the microbead 3 is formed on the pillar material 2. The pillar 1 is manufactured by pressing the pillar material 2. Furthermore, in the pillar 1 and the method for manufacturing the pillar 1 according to the present embodiment, when the pillar material 2 is pressed, the microbead 3 is crushed to increase the plate thickness. For this reason, it is not necessary to provide a reinforcement member separately, and the reinforcement part 15 can be reinforced without preventing the weight reduction of the whole pillar.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the center pillar is cited as the skeleton member. However, the pillar may be a pillar disposed at another position, or a skeleton member other than the pillar, such as a rocker or a side member. There may be.

  Moreover, in the said embodiment, although the shape which looked at the reinforcement part 15 in front is made into the substantially rectangular shape, it can also be set as another shape, for example, an ellipse. Alternatively, as shown in FIG. 5 (a), the reinforcing portion 15 can be formed in a substantially H shape, and as shown in FIG. 5 (b), the non-reinforcing portion is provided inside the reinforcing portion 15. It can also be set as the aspect in which is formed.

  Furthermore, in the said embodiment, although the micro bead 3 is mentioned as an uneven | corrugated | grooved part, it can also be set as another uneven | corrugated shape, for example, a dimple shape. In the above embodiment, when the microbead 3 is formed, the microbead 3 is formed so as to be separated along the direction orthogonal to the longitudinal direction of the pillar material 2, but the microbead 3 is directed in the other direction. It can also be set as the aspect which forms.

  DESCRIPTION OF SYMBOLS 1 ... Pillar, 10 ... Pillar main body, 20 ... Upper end side bracket, 30 ... Lower end side bracket, 2 ... Pillar material, 3 ... Microbead, 10 ... Pillar main body, 11 ... Back plate, 12 ... Right side plate, 13 ... Left side plate 14 ... Flange, 15 ... Reinforcement part, 20 ... Right side plate, 30 ... Left side plate, 51 ... Male type, 52 ... Female type.

Claims (6)

A skeletal member that includes a reinforcing portion and is formed by pressing a skeleton member material,
An uneven portion is formed in the reinforcement target portion in the skeleton member material,
When the skeleton member material is pressed, the concavo-convex portion is compressed to increase the plate thickness, thereby forming the reinforcing portion ,
The reinforcing member has a shape in which a plurality of protrusions are alternately formed . A skeletal member that includes a reinforcing portion and is formed by pressing a skeleton member material,
A microbead is formed in the reinforcement target portion in the skeleton member material,
When the skeleton member material is pressed, the microbead is crushed and the plate thickness is increased to form the reinforcing portion ,
The reinforcing member has a shape in which a plurality of protrusions are alternately formed . The skeleton member according to claim 2, wherein the microbead is formed by arranging a plurality of protrusions having a thickness smaller than the protrusions in parallel with each other.   The skeleton member according to claim 3, wherein the micro beads are separated from each other along a direction intersecting a longitudinal direction of the skeleton member material. A method for producing a skeletal member comprising a reinforcing part and formed by pressing a skeleton member material,
An uneven portion is formed in the reinforcement target portion in the skeleton member material,
By pressing the skeleton member material, the reinforcing part is formed by increasing the plate thickness by compressing the uneven part ,
The method for manufacturing a skeleton member, wherein the reinforcing portion has a shape in which a plurality of protrusions are alternately formed . A method for producing a skeletal member comprising a reinforcing part and formed by pressing a skeleton member material,
A microbead is formed in the reinforcement target portion in the skeleton member material,
By pressing the skeleton member material, the reinforcing portion is formed by increasing the plate thickness by crushing the microbead ,
The method for manufacturing a skeleton member, wherein the reinforcing portion has a shape in which a plurality of protrusions are alternately formed .

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