JP5478313B2 - Body side structure - Google Patents

Description

  The present invention relates to a vehicle body side portion structure including a side panel outer that covers a side portion of a vehicle body from the outside.

In the vehicle body side structure, the roof rail portion, front pillar inclined portion, front pillar lower portion, side sill portion, and center pillar portion are formed of a plate material such as cold rolled steel plate, and a plurality of plate materials are sequentially joined to form a side panel outer. The
First, the roof rail part, the front pillar inclined part, the front pillar lower part, and the side sill part are joined, and the center pillar part is joined to the joined roof rail part, front pillar inclined part, front pillar lower part, and side sill part.

  According to this vehicle body side structure, it is not necessary to increase the dimensional accuracy of each plate material more than necessary by joining other plate materials, leaving one plate material, and then joining the remaining plate materials. The work can be performed easily and quickly (see, for example, Patent Document 1).

JP-A-8-243770

Here, the vehicle body side part structure of Patent Document 1 corresponds to a center pillar part, for example, when a side panel outer is manufactured, a plurality of blank materials are sequentially laser welded to form a frame-like structure. The blank material is spot welded and pressed to complete the product.
Since the center pillar portion needs strength to support the side collision load, it is desirable to use a high-tensile steel plate. However, since the center pillar portion has a shape that requires deep drawing, if the tensile strength is 590 MPa or more, the center pillar portion may crack during press molding.

  It is an object of the present invention to provide a vehicle body side structure that can form a center pillar portion of a side panel outer with a steel plate having high strength and is lightweight and has high rigidity and strength.

  The invention according to claim 1 is a vehicle body side portion structure including a side panel outer that covers a side portion of the vehicle body from the outside, wherein the center pillar portion of the side panel outer is formed separately from a high-tensile steel plate, and the center pillar portion Are joined to the side panel outer frame portion to constitute a side panel outer having door openings at the front and rear, and the ridgeline of the center pillar portion is continued to the ridgeline of the side sill portion.

In the invention according to claim 1, the side panel outer frame portion is a roof rail portion and the rear panel portion is an upper frame portion of a normal steel plate having a tensile strength of 270 МPa or more, and the front pillar lower portion and the side sill portion are high tensile steel plates having a tensile strength of 980 МPa or more. The lower frame portion is formed by joining both ends of the upper frame portion and the lower frame portion, and a center pillar portion of a high-tensile steel plate having a tensile strength of 590 МPa to 1180 МPa is disposed between the upper frame portion and the lower frame portion. Features.

The invention according to claim 1 is provided in the roof rail portion of the side panel outer frame portion, provided with a reinforcing member of a high-tensile steel plate whose front portion is coupled to the upper end of the front pillar lower portion, and the upper end of the center pillar portion is the rear portion of the reinforcing member. It is connected to the outer surface, and the extension extending downward from the roof rail part is overlapped with the extension facing outside the corner facing the door end of the roof rail part, and the lower end of the center pillar part is directed to the outer surface of the side sill part. It is characterized by being combined.

The invention according to claim 2 is characterized in that the center pillar portion is hot stamped so as to reduce the bending radius of the ridgeline of the center pillar portion so as to approach the outer edge of the door.

The invention according to claim 3 is characterized in that the door hinge surface of the center pillar portion and the vehicle width outer surface of the side sill portion are continuous, and the side sill garnish covers the joint portion between the center pillar portion and the side sill portion.

The invention according to claim 4 is characterized in that the center pillar portion forms a closed cross section that does not incorporate the center pillar stiffener together with the center pillar inner.

The present invention has the following effects.
In the invention according to claim 1, the vehicle body side part structure includes a side panel outer that covers the side part of the side panel inner of the vehicle body from the outside and forms a closed cross section.
The center pillar part of the side panel outer is formed separately from a high-strength steel plate, and the center pillar part is joined to the side panel outer frame part to form a side panel outer having door openings at the front and back, and the ridge line of the center pillar part is formed. It was made to continue to the ridgeline of the side sill part. In other words, the center pillar part is formed of a high-strength steel plate, and the ridge line of the center pillar part is made continuous with the ridge line of the side sill part. Can be distributed. This eliminates the need for a conventional center pillar stiffener and eliminates the need to open a large number of holes for discharging the electrodeposition paint such as the center pillar stiffener.

In the invention according to claim 1, the side panel outer frame portion is a roof rail portion and the rear panel portion is an upper frame portion of a normal steel plate having a tensile strength of 270 МPa or more, and the front pillar lower portion and the side sill portion are high tensile steel plates having a tensile strength of 980 МPa or more. A lower frame portion is formed by joining both ends of the upper frame portion and the lower frame portion, and a center pillar portion of a high-tensile steel plate having a tensile strength of 590 МPa to 1180 МPa is disposed between the upper frame portion and the lower frame portion. In other words, maintaining the merchantability as a normal steel plate with a tensile strength of 270 MPa or more with a good press formability that can improve the appearance by making the corner of the upper frame that is not covered by the door the sharp corner of the door. However, the lower frame portion and the center pillar portion that are covered with the door and cannot be seen from the outside are formed of a high-tensile steel plate having a required strength but poor press formability, and the internal reinforcing member can be eliminated. As a result, an inexpensive and lightweight body with high rigidity and strength can be obtained.

In the invention which concerns on Claim 1, the reinforcement member of the high strength steel plate which couple | bonds a front part with the upper end of a front pillar lower part is provided in the roof rail part of a side panel outer frame part, and the upper end of a center pillar part is a rear outer surface of a reinforcement member And the extension part extending below the roof rail part and the corner part facing the door end part of the roof rail part are overlapped so that the extension part is outside, and the lower end of the center pillar part is directed to the outer surface of the side sill part Since they are joined, the side impact load can be dispersed from the upper end of the center pillar portion to the upper frame portion side of the normal steel plate.

In the invention according to claim 2, since the bend radius of the ridgeline of the center pillar portion is reduced by hot stamping so as to approach the outer edge of the door, the rigidity, strength, and load transmission characteristics can be improved.

In the invention according to claim 3, the door hinge surface of the center pillar portion and the outer width surface of the side sill portion are continuous, and the side sill garnish covers the joint portion between the center pillar portion and the side sill portion. It can suppress and can improve vehicle body rigidity.

In the invention according to claim 4, the center pillar portion is formed of a high-strength steel plate as the center pillar portion of the side panel outer, and has a closed cross section that does not incorporate the center pillar stiffener together with the center pillar inner portion. The center pillar stiffener is no longer necessary. As a result, it is not necessary to open a large number of holes in the center pillar portion in consideration of the adhesion of the paint at the time of electrodeposition coating, which is provided in the center pillar stiffener of the conventional high strength steel plate. Therefore, improvement in vehicle body performance is expected with the abolition of many holes. Furthermore, it is expected that the impact performance is improved and the cost is reduced due to the abolition of many holes.

It is a disassembled perspective view which shows the vehicle body side part structure which concerns on this invention. It is a perspective view of the side panel outer of the vehicle body side part structure shown by FIG. It is a perspective view of the center pillar of the vehicle body side part structure shown in FIG. It is front sectional drawing of the vehicle body side part structure shown by FIG. It is explanatory drawing which shows the junction part of the vehicle body side part structure shown by FIG. FIG. 2 is an operation explanatory diagram of assembling the vehicle body side structure shown in FIG. 1. It is explanatory drawing which shows the superimposition of the junction part of the vehicle body side part structure shown by FIG. FIG. 3 is an operation explanatory view showing a load transmission path of the vehicle body side part structure shown in FIG. 1. It is a comparative examination figure of the center pillar structure of the vehicle body side part structure which concerns on this invention. FIG. 10 is a comparative study diagram of the joining state of the lower end of the center pillar of the vehicle body side part structure shown in FIG. 9.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

As shown in FIGS. 1 to 4, the vehicle body side structure 10 covers the side panel outer 14 that covers the side surface of the side panel inner 19 of the vehicle body 11 and the side sill portion 33 of the side panel outer 14 from the outside. Side sill garnish 15.
The side panel outer 14 is joined to the side panel inner 19 so as to form a closed cross section. The side panel inner 19 includes a side sill inner 21, a front pillar inner 27 (including a front pillar lower inner 22), a center pillar inner 25, and a rear pillar inner 26.

  The side panel outer 14 includes a side sill portion 33 that covers the side sill inner 21 from the outside of the vehicle body, a front pillar lower portion 31 that covers the front pillar lower inner 22 from the outside of the vehicle body, and a center pillar that covers the center pillar inner 25 from the outside of the vehicle body. A portion 35, a rear pillar portion 36 that covers the rear pillar inner 26 from the outside of the vehicle body, a rear fender panel 39 that is formed behind the rear pillar portion 36 and covers the rear portion of the vehicle body, an inclined portion 28 of the front pillar inner 27, and a roof rail inner 29 A roof rail portion 37 that covers from the side, and a stiffener (roof rail stiffener) 38 that reinforces the roof rail portion 37 from the inside.

  The rear pillar portion 36 and the rear fender panel 39 constitute a rear panel portion 34. The stiffener (roof rail stiffener) 38 is a reinforcing member.

The side sill portion 33 extends linearly in the longitudinal direction of the vehicle body. The front pillar lower portion 31 is raised substantially vertically from the front end of the side sill portion 33.
The side sill portion 33 and the front pillar lower portion 31 are integrally formed via the bent portion 32. That is, the front pillar lower portion 31, the bent portion 32, and the side sill portion 33 are integrally formed of the same material and constitute a lower frame portion (L-shaped member) 41.

  The center pillar portion 35 is a member that extends substantially vertically from the middle of the side sill portion 33 in an I-shape. The roof rail portion 37 and the rear panel portion 34 (consisting of the rear pillar portion 36 and the rear fender panel 39) are integrally formed of the same material and constitute an upper frame portion (composite member) 42. The stiffener (roof rail stiffener) 38 is formed along the roof rail portion 37.

  That is, the side panel outer 14 is formed by joining the center pillar part 35 to the upper frame part 42 to which the lower frame part 41 and the stiffener 38 formed separately are joined. A side panel outer frame portion 96 is formed by the lower frame portion 41 and the upper frame portion 42 (including the stiffener 38).

  The side sill 16 includes a side sill portion 33 of the side panel outer 14 and a side sill inner 21 in which the side sill portion 33 is combined to form a closed cross section. The side sill 16 is provided with a side sill garnish 15 that covers the side sill portion 33.

  The front pillar 18 includes a front pillar lower 17 that is raised from the side sill 16 and a front pillar inclined portion 18a that is inclined from the front pillar lower 17 and extends to the rear of the vehicle body.

  The front pillar inclined portion 18 a includes an inclined portion 28 of the front pillar inner 27 and a front half portion 37 a of the roof rail portion 37. The front pillar lower 17 includes a front pillar lower portion 31 of the side panel outer 14 and a front pillar lower inner 22 in which the front pillar lower portion 31 is combined to form a closed cross section.

  As shown in FIG. 4, the roof rail 45 includes a roof rail inner 29, a roof rail portion 37, and a stiffener 38. The roof rail portion 37 is provided with a stiffener 38 inside, and a closed cross section (rail side closed cross section) 49 is formed by the stiffener 38 and the roof rail inner 29. The upper part of the center pillar inner 25 is joined to the inside of the roof rail inner 29.

As shown in FIGS. 3 and 6, the stiffener 38 has a front portion 38 a joined to the upper end 31 a of the front pillar lower portion 31 and a rear portion (rear intermediate portion) 38 b joined to the upper end 35 a of the center pillar portion 35. The
The center pillar 47 includes a center pillar inner 25 and a center pillar portion 35 of the side panel outer 14.

  The upper end 35a of the center pillar portion 35 is joined to the outer surface 38c of the stiffener 38 of the roof rail portion 37, the lower end 35b is joined to the side sill portion 33, the center pillar portion 35, the roof rail portion 37, the front pillar lower portion 31, the side sill portion 33, and Front and rear door openings 44 </ b> A and 44 </ b> B are constituted by the rear pillar portion 36. The door hinge surface 48 formed on the side surface (vehicle width surface) 35e of the center pillar portion 35 is made flat and continuous with the vehicle width outer surface (side wall) 73 of the side sill portion 33 (see FIG. 5A).

  At the upper end 35 a of the center pillar portion (center pillar outer) 35, the extended portion 37 c of the roof rail portion 37 is placed on the surface side of the upper end 35 a of the center pillar portion 35. In other words, the center pillar part 35 is inserted into the extension part 37 c of the roof rail part 37. Further, the upper end 35 a of the center pillar portion 35 is joined to the outer surface 38 c of the stiffener (roof rail stiffener) 38. A sealer (not shown) is applied to the mating portion of the roof rail portion 37 with the extension portion 37c. Since the center pillar portion 35 is hidden by a door (not shown), there is no problem in appearance.

  At the lower end 35 b of the center pillar portion 35, the center pillar portion 35 is covered with a side sill portion 33 having a hat-shaped cross section. The ridge lines 35 c and 35 d of the center pillar part 35 having a hat-like cross section are continued to the ridge line 78 of the side sill part 33.

The center pillar portion 35 is connected to a roof arch 84 extending in the vehicle width direction from the upper portion of the center pillar inner 25 with the closed section 49 interposed therebetween. An upper portion of the roof arch 84 is covered with a roof panel 85.
A plurality of roof arches may be arranged at the front and rear of the vehicle body at the height of the closed section 49.

Hereinafter, the material used for the vehicle body side structure 10 will be described.
The L-shaped member 41 in which the side sill portion 33 and the front pillar lower portion 31 are integrally formed is formed of a cold-rolled steel plate of a high-tensile steel plate such as SPC980.

SPC refers to a cold-rolled steel sheet, and SPC 980 refers to a cold-rolled steel sheet having a tensile strength exceeding 980 MPa. SPC590 is a cold rolled steel sheet having a tensile strength of 590 MPa or more, and SPC270 is a cold rolled steel sheet having a tensile strength of 270 MPa or more.
By the way, a cold-rolled steel sheet having a tensile strength of 590 MPa or more is called a high-tensile steel sheet, and a cold-rolled steel sheet having a tensile strength of 270 MPa or more is called a normal steel sheet.

By the way, the high-tensile steel sheet has a high tensile strength as described above. That is, the strength of the product can be increased by using a high-tensile steel plate. Thereby, the weight of the product can be reduced and the cost can be reduced by omitting the conventionally used stiffener or by reducing the thickness of the material. When a reinforcement (stiffener) is provided inside the side panel outer, the weight of the vehicle body is increased.
On the other hand, a high-tensile steel plate is inferior to a normal steel plate in terms of material extensibility. For this reason, the hoof rail portion of the side panel outer as seen by a person has a portion where the bending R is set small in design, and a high-tensile steel plate is not used. Conventionally, high-strength steel sheets have been mainly used for reinforcement inside the side panel outer.

  As shown in FIG. 3, the center pillar portion 35 is hot stamped with a cold rolled steel plate (hot stamp material) having a tensile strength of 590 to 1180 MPa. Here, the hot stamping method (hot stamping method) is a method that makes it easier to deform by heating the steel plate to a high temperature, and at the same time forming the steel plate with a mold and quenching rapidly to obtain higher strength than before forming. It is. That is, it is possible to increase the tensile strength to about 1500 MPa by rapidly cooling the steel plate heated to a high temperature.

Cold rolled steel having a tensile strength of 590 to 1180 MPa may use a tailored blank material in which different materials (steel plates having different plate thicknesses or steel plates having different tensile strengths) are joined in advance. Thereby, a material with high tensile strength can be used only for a necessary part.
The center pillar part 35 may be formed by partially press-forming a cold-rolled steel sheet having a tensile strength of 590 MPa and a tensile strength of 1180 MPa and then connecting it.

  Further, the center pillar inner 25 is also hot stamped with a cold-rolled steel plate of a high-tensile steel plate, and a center pillar 47 is formed by the center pillar portion 35 and the center pillar inner 25.

  The center pillar portion 35 is hot stamped with a cold-rolled steel sheet having a tensile strength of 590 to 1180 MPa, so that a large forming load is not required at the time of pressing and the center pillar portion 35 can be prevented from cracking. , Can maintain the stability of quality.

For the center pillar part 35, a cold rolled steel sheet having a tensile strength of 590 to 1180 MPa is partially used, and a tailored blank material in which different materials are joined in advance is used, so that a material having a high tensile strength is applied only to a necessary part. Can be used.
The center pillar portion 35 and the center pillar inner 25 form a closed section 99 that does not incorporate a center pillar stiffener.

  The stiffener 38 is formed of a cold-rolled steel plate having a tensile strength exceeding 980 MPa. Specifically, a galvanized steel plate (JAC980YL) is used. JAC980YL is a galvanized steel plate of a high strength steel plate and has a tensile strength of 980 MPa or more.

  The roof rail portion 37 and the rear panel portion 34 (consisting of the rear pillar portion 36 and the rear fender panel 39) are integrally formed of a cold-rolled steel plate having a tensile strength exceeding 270 MPa that is easy to press-form. Specifically, a galvanized steel sheet (JAC270E) is used. The JAC270E material is a normal galvanized steel plate, has a tensile strength of 270 MPa or more, and has a good workability with a low yield point.

  5-7, the roof rail portion 37, the rear pillar portion 36 and the rear fender panel 39 of the side panel outer 14 are made of JAC270E material, and the front pillar lower portion 31 and the side sill portion 33 are made of JAC980YL high-tensile steel plate ( The center pillar portion 35 is formed of a high-tensile steel plate (hot stamp material) of 1000 MPa or more, and the upper end 35a of the center pillar portion 35 is joined to the outer surface 38c of the stiffener 38 of the high-tensile steel plate (high-tensile material). The lower end 35b is joined to the side sill portion 33 of a high-tensile steel plate (high-tensile material) to constitute the vehicle body side structure 10 (side panel outer 14).

That is, the roof rail portion 37 is made of a JAC270E material having good moldability. Thereby, the press molding crack of the part with a small bending radius (corner R) of the corner | angular parts 86 and 87 (refer FIG. 4, FIG. 8) of the roof rail part 37 is suppressed.
The front pillar lower portion 31 and the side sill portion 33 are integrally formed of a high-tensile steel plate (high-tensile material) made of JAC980YL. Thereby, the vehicle body rigidity is improved and the side collision strength is improved.

  The center pillar portion 35 was molded from a hot stamp material of 1000 MPa or more. This facilitates molding and increases the strength of the center pillar portion 35. The upper end 35a of the center pillar part 35 is joined to the outer surface 38c of the stiffener 38 of the high-tensile steel plate (high-tensile material), and the lower end 35b is joined to the side sill part 33 of the high-tensile steel plate (high-tensile material). Thereby, the frame part 97 in which the front door opening 44 </ b> A is formed is a high-strength frame body, and the vehicle body rigidity is improved and the side impact load support strength is increased.

As shown in FIG. 5 (a), in the vehicle body side structure 10, the side panel outer 14 has a center pillar attached to a lower frame portion 41 formed separately and an upper frame portion 42 to which a stiffener 38 is joined. The part 35 is formed by bonding.
When the center pillar portion 35 is welded to the roof rail portion 37 and the side sill portion 33, the upper end 35a of the center pillar portion 35 is set to the inside of the extension portion 37c of the upper frame portion 42, and the lower end 35b is set to the outer surface 72 of the lower frame portion 41. , Welded.

  FIG. 5B is an enlarged view of the portion a in FIG. 5A. At the upper end 35a of the center pillar portion 35 (see FIG. 4), the extended portion 37c of the roof rail portion 37 of a normal steel plate is made of a high-strength member. Since it covers the surface side of the upper end 35 a of the center pillar portion 35 (see FIG. 6), the high strength member can be combined with the stiffener 38 of the strength component inside the roof rail portion 37.

  FIG. 5C is an enlarged view of the portion b of FIG. 5A, and the lower end 35b of the center pillar portion 35 covers the center pillar portion 35 of the high strength member on the side sill portion 33 of the high strength member. The side sill portion 33 does not need to open the outer surface 72, and the side sill portion 33 can be effectively operated against a frontal collision or a side collision by eliminating the crease of the side sill 33.

  As shown in FIG. 6, the side panel outer 14 is composed of an upper frame portion 42 in which a roof rail portion 37, a rear pillar portion 36 and a rear fender panel 39 are integrally formed by press forming of a normal steel plate, and a side sill portion from the front pillar lower portion 31. 33 is separately hot stamped into a side panel outer frame portion (side frame body) 96 joined by welding (or caulking) with a lower frame portion 41 integrally formed by press molding of high tensile material (980 material). It is obtained by connecting the center pillar part 35. Further, a high-tensile stiffener 38 is coupled to the inside of the roof rail portion 37 to form a high-strength frame portion 97 around the front door opening 44A.

  The upper end 35a of the center pillar portion 35 is joined (bonded) to a stiffener 38 formed of a high strength steel plate in the roof rail portion 37 as indicated by an arrow a1, and the lower end 35b is connected to a side sill portion 33 formed of a high strength steel plate. Join (bond) as in a2. A stiffener 38 formed of a high-strength steel plate and a front pillar lower portion 31 formed of a high-strength steel plate are joined as indicated by an arrow a3. Thereby, the frame part 97 (consisting of the stiffener 38, the front pillar lower 17, the side sill 16, and the center pillar 47) forming the front door opening 44A can be a high-strength frame. As a result, the vehicle body rigidity can be improved and the side impact load support strength can be increased.

  As shown in FIGS. 7A and 7B, a roof rail portion 37 and a rear panel portion 34 (shown in FIG. 6) integrally formed of a cold rolled steel plate (270 material) exceeding a tensile strength of 270 MPa. As described above, the rear pillar portion 36 and the rear fender panel 39) are joined to the side sill portion 33 and the front pillar lower portion 31 integrally formed of a cold-rolled steel plate (980 material) having a tensile strength of 980 MPa. Sometimes, 980 material was inserted into the back side of 270 material as indicated by arrows c1 and c2. Thereby, it becomes possible to pass the 980 material integrally up to a desired portion regardless of the division position of the 270 material.

  As shown in FIG. 8A, the side impact load acts on the center pillar portion (center pillar outer) 35 as indicated by an arrow d1. In the vehicle body side structure 10, since the upper end 35a of the center pillar portion 35 is directly joined to the stiffener 38 of the roof rail portion 37, the load inputted to the center pillar portion (center pillar outer) 35 at the side collision is shown in the stiffener 38 as shown by an arrow d2. Can be input.

  As shown in FIG. 8B, the load input to the stiffener (roof rail stiffener) 38 can be distributed to the roof arch 84 through the roof rail inner 29 and the center pillar inner 25 as indicated by an arrow d3. .

  In addition, since the roof rail part 37 is a normal steel plate (270 material), the bending radius (corner R) of the corner | angular part 86 and the corner | angular part 87 by press molding can be made small. Thereby, the clearance gap with the front door 98A or the rear door 98B (refer FIG. 4) can be narrowed, and the external appearance of a vehicle can be improved.

  As shown in FIG. 9A, in the vehicle body side structure 230 of the comparative example, the center pillar 231 includes a center pillar inner 232 provided inside the vehicle body and a side panel outer 233 side that covers the center pillar inner 232. The center pillar portion 234, the center pillar inner 232, the center pillar stiffener 235 interposed between the center pillar portion 234, and the side sill inner 236 to which the lower end of the center pillar inner 232 is joined. Therefore, the center pillar stiffener 235 is provided with a large number of holes 239 that allow the flow of the paint in consideration of the adhesion of the paint by electrodeposition coating (ED painting).

  As shown in FIG. 9B, in the vehicle body side structure of the embodiment, the center pillar 47 covers the center pillar inner 25 provided inside the vehicle body 11 (see FIG. 1) and the center pillar inner 25. It is comprised from the center pillar part 35 formed in the high intensity | strength by the side panel outer 14 side. Since the center pillar portion 35 also serves as a stiffener, electrodeposition coating (ED coating) cannot be a major problem. Therefore, it is not necessary to open a large number of holes (ED holes) in the center pillar portion 35 in consideration of the flow of the electrodeposition paint. Therefore, improvement in vehicle body performance such as improvement in vehicle body rigidity and side impact performance accompanying the abolition of the ED hole is expected. Moreover, the effect of cost reduction accompanying the abolition of ED hole processing is expected.

  As shown in FIG. 10A, in the vehicle body side structure 230 of the comparative example, the center pillar 234 (see FIG. 9A) was not a high-strength member. (Reinforcement) 237 and 238 formed ridge lines as strength members with 235 and side sill inner 236.

  As shown in FIG. 10B, in the vehicle body side part structure 10 of the embodiment, the center pillar part (center pillar outer) 35 is formed of a high-strength member, so that the strength members (center pillar part 35 and side sills) The ridgelines 35c, 35d, 78 of the part 33) can be made continuous as indicated by arrows e1, e2. As a result, the strength and rigidity are improved on the side closer to the collision object, and the side collision performance can be improved.

Since the center pillar portion 35 is hot stamped, the ridge lines 35c and 35d of the center pillar portion 35 can be formed small. Therefore, the surface with which the door seal 88 in the vicinity of the ridges 35c and 35d (see FIG. 10B) abuts can be brought closer to the door seal 88 (see FIG. 4) side.
Further, since the door hinge surface 48 of the center pillar portion 35 is formed continuously with the vehicle width outer surface (side wall) 73 (see FIG. 5) of the side sill portion 33, mutual deformation in the left and right directions in the vehicle width direction is suppressed, and the vehicle body rigidity is reduced. It is possible to contribute to improvement.

  The vehicle body side structure 10 includes a side panel outer 14 that covers a side portion of the side panel inner 19 of the vehicle body 11 from the outside and forms a closed cross section. The side panel outer 14 includes a roof rail portion 37 that covers at least the roof rail inner 29 of the vehicle body 11 and the inclined portion 28 of the front pillar inner 27, a front pillar lower portion 31 that covers the front pillar lower inner 27 of the vehicle body 11, and a side sill of the vehicle body 11. A side sill portion 33 that covers the inner 21 and a center pillar portion 35 that covers the center pillar inner 25 of the vehicle body 11 are provided.

  The center pillar portion 35, the roof rail portion 37, the front pillar lower portion 31 and the side sill portion 33 constitute a front door opening 44A, and the center pillar portion 35 is hot stamped with a cold-rolled steel plate having a tensile strength of 590 to 1180 MPa. Since the ridge lines 35c, 35d of the center pillar portion 35 are smoothly continued to the ridge line 78 in the front-rear direction of the side sill portion 33, the side impact load received by the door hinge surface 48 formed on the center pillar portion 35 is It can disperse | distribute to the side sill 16 with high intensity | strength and rigidity comprised with the side sill inner 21 and the side sill part 33.

  Further, since the center pillar portion 35 is hot stamped with a cold rolled steel plate having a tensile strength of 590 to 1180 MPa, for example, as in the case of a conventional center pillar stiffener 235 (see FIG. 9A), It is not necessary to open a large number of holes 239 in consideration of the adhesion of the paint. As a result, the processing cost can be reduced by eliminating a large number of holes.

  The vehicle body side structure 10 includes a side panel outer 14 that covers the side of the vehicle body 11 from the outside. The center pillar portion 35 of the side panel outer 14 is formed separately from a high-tensile steel plate, and the center pillar portion 35 is formed as a side. The side panel outer 14 having door openings 44A and 44B joined to the panel outer frame portion 96 is formed, and the ridge lines 35c and 35d of the center pillar portion 35 are connected to the ridge line 78 of the side sill portion 33. it can.

  That is, the center pillar portion 35 is formed of a high-strength steel plate, and the ridge lines 35c and 35d of the center pillar portion 35 are made continuous with the ridge line 78 of the side sill portion 33. Therefore, the side impact load received by the door hinge surface 48 of the center pillar portion 35 Can be dispersed in the side sill portion 33 of the high-tensile steel plate. This eliminates the need for the conventional center pillar stiffener 235 (see FIG. 9A) and eliminates the need for opening a large number of holes for discharging the electrodeposition paint as in the center pillar stiffener 235.

  Since the center pillar portion 35 is hot stamped, the bend radii (corner R) of the ridge lines 35c and 35d can be formed small, and the rigidity, strength, and load transmission characteristics can be improved.

  Since the door hinge surface 48 of the center pillar portion 35 is made flat and continuous with the vehicle width outer surface (side wall) 73 of the side sill portion 33, deformation of the door hinge surface 48 in the vehicle width direction (left and right) is suppressed to improve vehicle body rigidity. Can be planned.

  The center pillar portion 35 is made of a high-strength steel plate as the center pillar portion 35 of the side panel outer 14 and has a closed cross section 99 that does not incorporate the center pillar stiffener together with the center pillar inner 25. Is no longer necessary. As a result, it is not necessary to open a large number of holes in the center pillar portion 35 in consideration of the adhesion of the paint at the time of electrodeposition coating, which is provided in the center pillar stiffener of the conventional high strength steel plate. Therefore, improvement in vehicle body performance is expected with the abolition of many holes. Furthermore, it is expected that the impact performance is improved and the cost is reduced due to the abolition of many holes.

  The roof rail part 37 and the rear panel part 34 are the upper frame part 42 of the normal steel plate, the front pillar lower part 31 and the side sill part 33 are the lower frame part 41 of the high-tensile steel plate, and both ends of the respective frame parts 41 and 42 are joined. The side panel outer frame portion 96 is formed, and the center pillar portion 35 is disposed between the upper frame portion 42 and the lower frame portion 41. That is, a portion requiring strength can be formed of a high-tensile steel plate, and, for example, an internal reinforcing member can be eliminated. As a result, an inexpensive and lightweight body with high rigidity and strength can be obtained.

  In the vehicle body side structure 10, a high-strength steel plate reinforcing member (stiffener) 38 that connects the front portion 38 a to the upper end 31 a of the front pillar lower portion 31 is provided in the roof rail portion 37 of the side panel outer frame portion 96. Since the upper end 35a of the portion 35 is coupled to the outer surface 38c of the rear portion 38b of the reinforcing member 38 and the lower end 35b of the center pillar portion 35 is coupled to the outer surface 72 of the side sill portion 33, a side collision load is also applied from the upper end of the center pillar portion 35. Can be distributed.

  In the vehicle body side structure according to the present invention, as shown in FIG. 3, the center pillar portion 35 is hot stamped with a cold-rolled steel plate having a tensile strength of 590 to 1180 MPa, but is not limited thereto. It does not prevent other parts from being hot stamped with a cold-rolled steel sheet having a tensile strength of 590 to 1180 MPa.

  In the vehicle body side structure according to the present invention, as shown in FIG. 1, a cold rolled steel sheet having a tensile strength exceeding 980 MPa is used for the stiffener 38 of the roof rail portion 37. However, the present invention is not limited to this. This part does not preclude the use of a cold-rolled steel sheet having a tensile strength of 980 MPa.

  The vehicle body side part structure according to the present invention is suitable for use in a passenger car including a vehicle body side part structure including a side panel outer that covers the side part of the vehicle body from the outside.

  DESCRIPTION OF SYMBOLS 10 ... Car body side part structure, 11 ... Car body, 14 ... Side panel outer, 21 ... Side sill inner, 25 ... Center pillar inner, 27 ... Front pillar inner, 28 ... Inclined part, 29 ... Roof rail inner, 31 ... Front pillar lower part 31a ... upper end, 33 ... side sill part, 34 ... rear panel part, 35 ... center pillar part, 35a ... upper end, 35b ... lower end, 35c, 35d ... ridgeline, 37 ... roof rail part, 38 ... reinforcement member (stiffener), 38c ... Outer surface, 41 ... lower frame portion, 42 ... upper frame portion, 44A, 44B ... front and rear door openings, 48 ... door hinge surface, 73 ... vehicle width outer surface, 78 ... ridgeline, 96 ... side panel outer frame portion.

Claims (4)

In the vehicle body side part structure including the side panel outer that covers the side part of the vehicle body from the outside,
Wherein the center pillar portion of the side panel outer formed separately by high-tensile steel plate, and constitutes a side panel outer having a door opening in the back and forth joining the center pillar portion to the side panel outer frame portion, the center pillar portion ridge was continuous to the ridge line of the side sill part of,
The side panel outer frame portion has a roof rail portion and a rear panel portion as an upper frame portion of a normal steel plate having a tensile strength of 270 МPa or more, and a front pillar lower portion and a side sill portion as a lower frame portion of a high-tensile steel plate having a tensile strength of 980 МPa or more, Formed by joining both ends of the upper frame part and the lower frame part, the center pillar part of a high-tensile steel plate having a tensile strength of 590 МPa to 1180 МPa is disposed between the upper frame part and the lower frame part,
In the roof rail portion of the side panel outer frame portion, a reinforcing member made of a high-tensile steel plate that connects the front outer surface with the upper end of the front pillar lower portion is provided, and the upper end of the center pillar portion is connected to the rear outer surface of the reinforcing member. And connecting the extension part extending below the roof rail part and the corner part facing the upper end part of the door of the roof rail part so that the extension part is outside, and the lower end of the center pillar part is A vehicle body side structure characterized by being coupled to the outer surface of the side sill . The vehicle body side structure according to claim 1, wherein the center pillar portion is hot stamped so as to reduce a bending radius of a ridge line of the center pillar portion so as to approach the door seal . 2. The vehicle body side structure according to claim 1, wherein a door hinge surface of the center pillar portion and a vehicle width outer surface of the side sill portion are continuous , and a side sill garnish covers a joint portion between the center pillar portion and the side sill portion. .   The vehicle body side part structure according to claim 1, wherein the center pillar portion forms a closed cross section that does not incorporate a center pillar stiffener together with a center pillar inner.

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