Vehicle center pillar components and their manufacturing methods

Abstract

According to an embodiment, a vehicle center pillar member is provided, which is formed by stamping a welded blank into a hat-shaped cross-section. The welded blank is formed by joining multiple components along at least one joining line in the length direction. The vehicle center pillar member has a top plate portion and two longitudinal wall portions on both sides. The at least one joining line of the welded blank in the longitudinal wall portions is in the same direction as the stamping direction during stamping. According to the embodiment, the at least one joining line is bent into a shape in which the components forming the two sides of the welded blank in the top plate portion interlock.

Description

Technical Field

[0001] The embodiments disclosed in this application relate to vehicle center pillar components and their manufacturing methods. In particular, they relate to a technique for forming a hat-shaped cross-section of a vehicle center pillar component using a welded blank through stamping. Background Technology

[0002] In automobiles and other vehicles, a center pillar (commonly referred to as the B-pillar) is provided as a structural member on the side of the vehicle body. The center pillar is positioned on the side of the body so that its length direction is oriented towards the vehicle height direction. Typically, the center pillar consists of an outer member and an inner member. The cross-section of the outer member, orthogonal to the length direction, is cap-shaped. This cap-shaped cross-section has a central top plate portion and longitudinal wall portions on both sides. The longitudinal wall portions are members positioned in the width direction of the vehicle. The boundary between the top plate portion and the longitudinal wall portions bends to form ridges in the length direction. The distance between the two ridges formed on both sides, i.e., the width of the top plate portion, usually varies in the length direction, typically expanding from top to bottom.

[0003] Typically, the center pillar components for vehicles are made of sheet steel and formed by stamping. Furthermore, in order to achieve lightweight center pillar components, welded blanks formed by joining multiple sheet steel components are used, thereby increasing the thickness of the sheet steel or using sheet steel with high tensile strength only in areas where strength is required (see Japanese Patent Application Publication No. 2018-122733).

[0004] However, welded blanks are components formed by joining multiple parts through welding or other methods, thus creating joint lines between adjacent joined parts. When using welded blanks to stamp-form a central column member with a cap-shaped cross-section, the stamping load is also applied to the longitudinal wall portion. Previously, the relative configuration of the stamping direction and the joint line direction of the welded blank was not considered at all, resulting in inconsistent orientations in practice.

[0005] Figure 13 This indicates the joint line W and stamping direction Y of the welded blank TB in the longitudinal wall portion 124 of the existing outer member 110 of the central column. For example... Figure 13 As shown, under the existing conditions, the stamping direction Y becomes a different direction from the direction of the joint line W of the welded blank TB.

[0006] The steel plate components on both sides of the joint line W of the welded blank TB have different tensile strengths and plate thicknesses, so... Figure 13 As shown, if the stamping direction Y is different from the forming direction of the joint line W, there is a concern that cracking may occur along the joint line W during stamping due to the strength difference on both sides of the joint line W. Figure 13 In the diagram, a diagonal line is used to indicate an area where there is a concern about cracking due to the difference in strength, where the material strength of part A (TB9) of the welded blank TB is high while that of part B (TB8) is low.

[0007] In detail, the wall thickness of the steel plate in part A (TB9), which has high material strength, is less likely to change in the stamping direction Y during stamping, while the wall thickness of the steel plate in part B (TB8), which has low material strength, is more likely to change in the stamping direction Y during stamping. As described above, if there is a difference in material strength at the joint line W between part A (TB9) and part B (TB8), the side with higher material strength will remain unchanged while the side with lower material strength will change. Therefore, the side with lower material strength will be pulled in the stamping direction Y, which raises concerns about the joint line W between part A (TB9) and part B (TB8) potentially cracking. Summary of the Invention

[0008] Therefore, it is desirable to prevent or even suppress cracking at the joint line of the longitudinal wall when using welded blanks to stamp and form a cap-shaped cross-section of the central column member.

[0009] One approach is a vehicle center pillar component formed by stamping a welded blank into a hat-shaped cross-section. The welded blank is formed by joining multiple components along at least one joining line in the length direction. The vehicle center pillar component has a top plate portion and longitudinal wall portions on both sides. The at least one joining line of the welded blank in the longitudinal wall portions is in the same direction as the stamping direction during stamping.

[0010] According to the embodiment, the at least one joining line is bent into a shape in which the components forming both sides of the welded blank in the top plate portion fit together in a concave-convex shape while the welded blank is in the state of the welded blank.

[0011] According to the embodiment, in the state of the welded blank, the at least one joining line extends in a straight line from the joining line formed on the longitudinal wall portions on both sides to the top plate portion, and is connected in the top plate portion in a manner that forms an angle.

[0012] According to the embodiment, the at least one joining line extends in a straight line from the longitudinal wall portions on both sides to the top plate portion in the state of the welded blank, and is connected in an arc-shaped portion in the top plate portion.

[0013] According to the embodiment, in the state of the welded blank, the at least one joining line extends in a straight line from the longitudinal wall portions on both sides to the top plate portion, and is connected to the top plate portion via other straight portions, forming two corners at both ends of the straight portions.

[0014] According to the embodiment, the vehicle has a lower door hinge mounting portion, a joint portion that engages with the lower longitudinal beam of the vehicle body, and a widened area between them, wherein one of the at least one joint line is located in the widened area.

[0015] Another method is a method for manufacturing the aforementioned vehicle center pillar component, in which the aforementioned welded blank is formed such that at least one of the aforementioned joint lines in the aforementioned longitudinal wall portion is in the same direction as the stamping direction, and the aforementioned welded blank is stamped along the aforementioned stamping direction, thereby forming the aforementioned vehicle center pillar component. Attached Figure Description

[0016] Figure 1 This is a perspective view showing the external structure of the outer component of the central column as one embodiment.

[0017] Figure 2 It is a schematic representation Figure 1 A sectional view of the basic structure of the outer component of the central column along line II-II.

[0018] Figure 3 This diagram shows the moment when the upper cutter descends from the top dead center and contacts the welded blank through the blank holder during the stamping process of the outer component of the central column.

[0019] Figure 4 This diagram shows the state of the outer component of the central column during the stamping process.

[0020] Figure 5 This diagram shows the state of the outer component of the central column after forming (bottom dead center) during the stamping process.

[0021] Figure 6 This is a side view of the outer component of the center pillar, taken from the side of the vehicle.

[0022] Figure 7 yes Figure 6 View VII of the outer component of the central column.

[0023] Figure 8 This is a diagram showing the second joint line formed in a welding blank as one embodiment.

[0024] Figure 9 This is a diagram showing the second joining line as an alternative embodiment.

[0025] Figure 10 This is a diagram showing the second joining line as yet another embodiment.

[0026] Figure 11 The existing outer component of the center pillar is seen from the side of the vehicle. Figure 6 The corresponding side view.

[0027] Figure 12 yes Figure 11 XII view of the outer component of the central column.

[0028] Figure 13It is a diagram showing the joint line of the welded blanks in the existing longitudinal wall section and the stamping direction during forming. Detailed Implementation

[0029] Hereinafter, various embodiments will be described with reference to the accompanying drawings. Furthermore, directions such as up / down, front / back, and left / right are used in the description of the drawings to indicate directions in the figures. Directions specifically shown individually are based on this display. Additionally, where there are components corresponding to left and right, and where the left and right components are designated separately, the component on the left is labeled L and the component on the right is labeled R at the end of the reference numeral indicating that component.

[0030] <Basic Structure of the Outer Components of the Central Column>

[0031] Figure 1 This is a perspective view of a center pillar disposed on the side of a car body as one embodiment. Specifically, the center pillar is typically constructed as a closed-section structural member consisting of an outer member and an inner member, but... Figure 1 Only the outer member 10 of the center pillar is shown. The outer member 10 of the center pillar is positioned such that its length direction is oriented towards the height direction of the vehicle (in... Figure 1 The structure is arranged in a vertical orientation and consists of upper and lower mounting portions 12 and 14, and a middle beam portion 16. The upper mounting portion 12 engages with the roof 18, and the lower mounting portion 14 engages with the lower longitudinal beam 20. Furthermore, the upper and lower mounting portions 12 and 14 are typically T-shaped to increase the engagement area with the roof 18 and the lower longitudinal beam 20, and are thus formed into complex shapes through deep drawing or other processes. The middle beam portion 16 has a relatively simple shape.

[0032] <Helmet-shaped section>

[0033] Figure 2 schematically shown Figure 1 The basic shape of the cross-section along line II-II of the outer member 10 of the center pillar. The cross-section of the outer member 10 of the center pillar is formed in a hat shape. The hat-shaped cross-section is generally formed by a central top plate portion 22, longitudinal wall portions 24 located on both sides of the top plate portion 22, and flange portions 26 located further on both sides of the longitudinal wall portions 24. In addition, the longitudinal wall portions 24 are formed by the front side of the vehicle (in Figure 2 The longitudinal wall portion 24L (viewed from the left side) and the longitudinal wall portion 24R (viewed from the right side) are composed of the left flange portion 26L and the right flange portion 26R. For example... Figure 1 As shown, the boundary between the top plate portion 22 and the longitudinal wall portion 24 forms an edge line 27, and the width between the left and right edge lines 27L and 27R varies in the length direction. For example, the width of the beam portion 16 increases from top to bottom.

[0034] <Hinge mounting section for rear doors>

[0035] like Figure 1 As shown, in the top plate portion 22 of the middle beam portion 16, door hinge mounting portions 28U and 28D are provided at the upper and lower parts. These door hinge mounting portions 28U and 28D are used to accommodate the rear side of the outer side member 10 of the center pillar (in Figure 2 The hinges (not shown) of the rear door (viewed from the right side) are installed. Additionally, Figure 1 The outer component 10 of the central column shown is formed by stamping a welded blank TB, which is formed by joining multiple components in the longitudinal direction. Figure 1 The joining line that forms the welded blank TB is omitted.

[0036] <Stamping>

[0037] Figures 3-5 This indicates the stamping process of the outer component 10 of the central column. Figure 3 This indicates the moment when the upper cutter 30 descends from the top dead center and comes into contact with the welded blank TB through the blank holder 34. Figure 4 This indicates the state during the forming process. Figure 5 This indicates the state after forming (bottom dead center). Specifically, this stamping forming process involves deep drawing. By moving the upper cutter 30, which serves as a movable die, toward the downward-facing punch 32, the welded blank TB is deep-drawn, thereby forming the blank. Figure 1 The outer member 10 of the central column with a hat-shaped cross-section is shown. Furthermore, the direction in which the movable upper cutter 30 moves is the stamping direction during stamping.

[0038] Figure 3 The state shown before forming (top dead center) is the state in which the welded blank TB is clamped by the upper cutter 30 and the blank holder 34, and the welded blank TB is positioned above the punch 32. Furthermore, from this state onwards, the upper cutter 30 and the blank holder 34 move downwards as a single unit.

[0039] Figure 4 The state shown in the diagram during the forming process indicates that the upper cutter 30 is moving from... Figure 3 The state during the deep drawing process involves the blank moving downwards and using the upper surface of the punch 32 to push the center of the welded blank TB upwards. Additionally, in... Figure 4 The position of the welded blank TB indicated by the dashed line represents... Figure 3 The position of the pre-forming welded blank TB is shown.

[0040] Figure 5 The state shown after forming (bottom dead center) indicates the state where the upper cutter 30 has moved to the bottom dead center of the stamping process, and the outer member 10 of the central column with a cap-shaped cross-section has been formed and the forming is complete. Additionally, with... Figure 4 The situation is the same, in Figure 5 The position of the welded blank TB indicated by the dashed line represents... Figure 3 The position of the pre-formed welded blank TB is shown. Additionally, in this embodiment of stamping, the upper die 30 may also be referred to as the upper die, and similarly, the punch 32 and the blank holder 34 may also be referred to as the lower die.

[0041] <Detailed Structure of the Outer Components of the Central Column>

[0042] Next, based on Figure 6 as well as Figure 7 The detailed structure of the outer component 10 of the central column is described below. Figure 6 This represents a side view, as seen from the side of the vehicle. Figure 7 express Figure 6 View VII. Additionally, in Figure 6 as well as Figure 7 In the diagram, the solid line represents the outer component 10 of the central column after stamping, and the double-dotted line represents the state of the welded blank TB before stamping. Therefore, the state of the welded blank TB shown by the double-dotted line is transformed into the outer component 10 of the central column shown by the solid line through stamping.

[0043] like Figure 6 As shown by the double-dotted line, the weldment blank TB is formed into a long strip shape by joining three plate members along its length. These three plate members consist of an upper member TB1, a central member TB2, and a lower member TB3. The upper member TB1 and the central member TB2 are integrally joined at the first joint line 36, and the central member TB2 and the lower member TB3 are integrally joined at the second joint line 38. This integral joining is typically achieved by welding (welded plate: TWB). Furthermore, the upper member TB1 corresponds to the aforementioned upper mounting portion 12, and the lower member TB3 corresponds to the lower mounting portion 14. Generally, the central member TB2 is stronger than both the upper member TB1 and the lower member TB3.

[0044] In this embodiment, a first joint line 36 is formed between the upper mounting portion 12 and the beam portion 16, and a second joint line 38 is formed between the beam portion 16 and the lower mounting portion 14. Specifically, the second joint line 38 is formed between the door hinge mounting portion 28D for mounting the lower side hinge of the rear door and the lower longitudinal beam 20 (see reference). Figure 1 Between the joined joints. Furthermore, in the assembly of joined welded blanks TB, there are combinations of components with the same strength and greater plate thickness to components with lesser plate thickness, combinations of components with the same plate thickness but different strengths, and combinations of components with different strengths and plate thicknesses. The materials are usually combinations of steel plates, but combinations of dissimilar materials such as steel and aluminum also exist.

[0045] <Direction of the joint line in the longitudinal wall>

[0046] The joint lines 36 and 38 of the welded blank TB are shaped as the portions L1, L2, R1, and R2 passing through the longitudinal walls 24L and 24R after forming. Figure 7 The direction shown is the same as the stamping direction Y during forming. Figure 7 In the middle, the first joint line 36 is formed on the front side of the vehicle (in Figure 6 The portion of the longitudinal wall 24L formed on the left side (viewed from the center) is indicated by reference numeral L1, and the portion of the longitudinal wall 24R formed on the rear side (right side) of the vehicle is indicated by reference numeral R1. Similarly, the portion of the longitudinal wall 24R formed on the front side (in the second joining line 38) of the second joining line 38 is indicated by reference numeral R1. Figure 6 The portion of the longitudinal wall 24L (viewed from the left side) is indicated by reference numeral L2, and the portion of the longitudinal wall 24R formed on the rear side (right side) of the vehicle is indicated by reference numeral R2. Additionally, in Figure 7 For ease of understanding, the part in the second junction line 38 should not be able to be derived from... Figure 7 The direction of the line of sight ( Figure 6 The right-hand portion R2 observed by arrow VII is also shown by a solid line. Furthermore, in Figure 7 In the diagram, the stamping direction is indicated by arrow Y. Therefore, this stamping direction Y is the same as the direction of portions L1 and L2 of the longitudinal wall portion 24L formed on the left side in the joining lines 36 and 38. Similarly, this stamping direction Y is also the same as the direction of portions R1 and R2 of the longitudinal wall portion 24R formed on the right side in the joining lines 36 and 38.

[0047] As one implementation, the stamping direction Y is set to take into account the springback of the outer member 10 of the central column after stamping. For example, the stamping direction Y is set such that the springback amount of the upper part (L1 side) and lower part (L2 side) of the outer member 10 of the central column is in the range of 5% to 10% in the stamping direction Y due to the tensile strength of the steel sheet.

[0048] The portion L1, L2 of the left-side longitudinal wall 24L and the portion R1, R2 of the right-side longitudinal wall 24R in the joining lines 36, 38 are aligned with the stamping direction Y because, in the aforementioned stamping process, particularly, the stamping load of the deep drawing process will act on the longitudinal wall portions 24L, 24R. In stamping, as... Figure 3 As shown, after setting the weldment blank TB, as Figure 4 as well as Figure 5 As shown, a deep drawing process is performed to form the outer component 10 of the central column, as shown by the solid lines. Furthermore, during this deep drawing process, the directions of the portions L1, L2, R1, and R2 formed in the longitudinal wall portions 24L and 24R in the joining lines 36 and 38 are as follows... Figure 7 The direction shown is the same as the stamping direction Y.

[0049] <Location of the second joint line>

[0050] Next, the position and shape of the second joint line 38 set at the lower part of the welded blank TB forming the outer side member 10 of the central column in the above embodiment will be described. Figure 6 As shown, joining lines 36 and 38 are joining lines that join multiple plate members TB1, TB2, and TB3 constituting the welded blank TB. The second joining line 38 is the line that joins the beam portion 16 to the lower mounting portion 14. The second joining line 38 is formed between the door hinge mounting portion 28D for mounting the lower hinge of the rear door and the lower longitudinal beam 20 of the vehicle body (see reference). Figure 1 The widened area between the joints of the joint.

[0051] <Shape of the second joint line in the top plate>

[0052] For the second joint line 38, in the state of the welded blank TB, portions L2 and R2 of the longitudinal wall portions 24L and 24R on both sides of the outer member 10 of the central column extend to the top plate portion 22 and connect with each other in the top plate portion 22. At the top plate portion 22, the lower edge of the beam portion 16 becomes a protrusion, and the upper edge of the mounting portion 14 at the lower end becomes a concave portion, thus forming a concave-convex fitting 52 in the length direction.

[0053] <Example 1 of the second joint line: an arc-shaped connection>

[0054] like Figure 8 As shown, in one embodiment, when the blank TB is welded together, the second joint line 38 can extend in a straight line from the portions L2 and R2 formed in the longitudinal wall portions 24L and 24R to the top plate portion 22, and then connect in an arc shape 40 in the top plate portion 22. If the concave-convex fitting 52 of the second joint line 38 is made into an arc shape 40, stress concentration at the second joint line 38 in the top plate portion 22 can be avoided during the stamping of the outer member 10 of the center pillar or when the vehicle is subjected to a side collision.

[0055] <Example 2 of the second joining line: connected by other straight lines>

[0056] like Figure 9As shown, in another embodiment, in the state of the welded blank TB, the second joint line 38 has extensions 50 and 51 that extend linearly from portions L2 and R2 formed in the longitudinal wall portions 24L and 24R to the top plate portion 22. These extensions 50 and 51 can be connected to each other via other straight portions 42 in the top plate portion 22. Therefore, angles 44 and 46 are formed at the intersections of the straight portions 42 and the aforementioned extensions 50 and 51 (the two ends of the straight portions 42). According to this configuration, the length of one component of the welded blank TB assembled to form the outer member 10 of the central column can be shorter in the longitudinal direction than in the first embodiment described above and the third embodiment described later. This improves the yield rate.

[0057] <Example 3 of the second joining line: connecting at a corner>

[0058] like Figure 10 As shown, in another embodiment, when the blank TB is welded together, the second joint line 38 can be formed by extending in a straight line from the portions L2 and R2 formed in the longitudinal wall portions 24L and 24R to the top plate portion 22, and forming an angle 48 at point 1. Furthermore, in Figure 6 The second joint line 38, depicted by the double-dotted line, is hypothetically shown as... Figure 10 The second joint line 38 of the welded blank TB. If the second joint line 38 is made into such a simple shape, the second joint line 38 is easy to form.

[0059] <Advantages of the above embodiments>

[0060] Figure 11 as well as Figure 12 This refers to the existing outer component 110 of the central column. Figure 11 Compared with the previously described implementation method Figure 6 correspond, Figure 12 and Figure 7 Corresponding. Existing standard joint line 138, as from... Figure 11 As can be seen, the welded blank TB is formed in a straight line. Therefore, during stamping, the direction of the L3 and R3 portions of the joint line 138 located in the longitudinal wall portions 24L and 24R is as follows: Figure 12 As shown, the direction is different from the stamping direction Y during forming. As mentioned above, if the portions L3 and R3 of the joint line 138 located in the longitudinal wall portions 24L and 24R are in a direction different from the stamping direction Y, then as explained at the beginning of this specification, there is a concern that cracking may occur along the joint line 138 due to the strength difference on both sides of the portions L3 and R3.

[0061] In contrast, according to the above-described implementation method, such as Figure 7As shown, the portions L1, L2, R1, and R2 of the longitudinal wall portions 24L and 24R where the joining lines 36 and 38 are formed are aligned with the stamping direction Y during forming. This prevents or even suppresses cracking at the first joining line 36 and the second joining line 38.

[0062] Specifically, in the above embodiment, the lower part of the outer side member 10 of the center pillar, where the second joint line 38 is formed, becomes an extended area between the door hinge mounting portion 28D for mounting the lower side hinge of the rear door and the joint portion that joins with the lower longitudinal beam 20 of the vehicle body. When a joint line is formed in such an area, cracks are prone to occur along the joint line, so aligning the direction of the joint line with the stamping direction is effective.

[0063] <Other Implementation Methods>

[0064] In the above embodiment, the components constituting the welded blank TB are 3 components, and the number of joint lines is 2, but it is not limited to this.

[0065] Furthermore, the form of the joint line of the top plate portion 22 is not limited to... Figures 8-10 It can be in the form of , or other forms.

[0066] Furthermore, as another implementation, the features of the outer component of the central column described above can also be applied to the inner component of the central column.

[0067] <Advantages of the Implementation Method>

[0068] Finally, the advantages of the above-described implementation method are noted.

[0069] In the above embodiment, at least one joint line of the welded blanks in the longitudinal wall portion is aligned with the stamping direction during stamping. Therefore, even if there is a strength difference between adjacent portions of the welded blanks, the tensile stress generated at the joint line during stamping is relatively small, thereby preventing or even suppressing cracking from the joint line of the longitudinal wall portion of the central column member.

[0070] According to the embodiment, at least one joining line is bent into a shape in which the components forming both sides of the welded blank in the top plate portion interlock. This allows for high-precision assembly in the width direction.

[0071] According to the embodiment, at least one joining line extends in a straight line from the joining lines formed on both sides of the longitudinal wall portion to the top plate portion in the state of the welded blank, and connects at the top plate portion in a manner that forms an angle. According to this form, the joining line is a simple form, and therefore it is easy to form the joining line.

[0072] According to the embodiment, at least one joining line extends linearly from the longitudinal walls on both sides to the top plate in the state of the welded blank, and is connected in the top plate via an arc-shaped portion. This configuration avoids stress concentration during the stamping of the center pillar member or during a side impact of the vehicle.

[0073] According to the embodiment, at least one joining line extends in a straight line from the longitudinal walls on both sides to the top plate portion in the state of the welded blank, and is connected to the top plate portion via other straight sections, forming two corners at both ends of the straight sections. According to this form, compared to the form described above which connects via a corner and an arc-shaped portion, the length in the longitudinal direction of one component of the welded blank assembled to form the central column component can be shortened. This results in a better yield.

[0074] According to the embodiment, the device includes a lower door hinge mounting portion, a joint portion that engages with the lower longitudinal beam of the vehicle body, and a widened area between them, with at least one of the joint lines located in the widened area of ​​the center pillar member. The joint line formed on the longitudinal wall portion of the widened area is particularly prone to cracking during stamping, thus significantly suppressing the aforementioned cracking.

[0075] The above describes specific implementation methods, but the technology is not limited to the above implementation methods. Those skilled in the art can apply various modifications, substitutions, and improvements.

Claims

1. A center pillar component for a vehicle, which is formed by stamping a welded blank into a hat-shaped cross-section, wherein the welded blank is formed by joining multiple components along at least one joint line in the length direction. The characteristic of the vehicle center pillar component is that... It has a top plate and two longitudinal walls on both sides. The at least one joint line of the welded blank in the longitudinal wall portion is in the same direction as the stamping direction during stamping.

2. The vehicle center pillar component according to claim 1, characterized in that, The at least one joining line is bent into a shape in which the components forming both sides of the welded blank in the top plate portion fit together.

3. The vehicle center pillar component according to claim 2, characterized in that, The at least one joining line extends in a straight line from the joining lines formed on the longitudinal wall portions on both sides to the top plate portion in the state of the welded blank, and is connected in the top plate portion in a manner that forms an angle.

4. The vehicle center pillar component according to claim 2, characterized in that, The at least one joining line extends in a straight line from the longitudinal wall portions on both sides to the top plate portion in the state of the welded blank, and is connected in the top plate portion via an arc-shaped portion.

5. The vehicle center pillar component according to claim 2, characterized in that, The at least one joining line extends in a straight line from the longitudinal wall portions on both sides to the top plate portion in the state of the welded blank, and is connected in the top plate portion via other straight portions, forming two corners at both ends of the straight portions.

6. The vehicle center pillar member according to any one of claims 1 to 5, characterized in that, It has a lower door hinge mounting section, a joint section that engages with the lower longitudinal beam of the vehicle body, and a widened area between them. One of the at least one joining lines is located in the widened region.

7. A method for manufacturing a vehicle center pillar member according to any one of claims 1 to 6, characterized in that, The welded blank is formed such that at least one joining line in the longitudinal wall portion is in the same direction as the stamping direction, and the welded blank is stamped along the stamping direction, thereby forming the vehicle center pillar component.

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