Welding parts

Abstract

To provide a welding component which enables reduction of restrictions, such as a mold used during insert molding, to improve flexibility of product design.SOLUTION: A welding component 1 has: a first member 3 provided with a first joint part 7 and a first recessed part 9 located adjacent to the first joint part 7; a second member 5 which is provided with a second joint part 11 and a second recessed part 13 located adjacent to the second joint part 11 and in which the second joint part 11 is joined to the first joint part 7 by welding; and a bead part 15 formed by welding and fitted in the first recessed part 9 and the second recessed part 13.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a welded component. [Background technology]

[0002] When plate materials are welded together, a convex shape is created by the bead at the joint. In other words, a raised bead (weld) is formed at the welded location. When insert molding is performed using a mold on a welded part with a bead formed, it is necessary to hold the welded part with the mold.

[0003] When holding a welded part with a die, it is necessary to avoid the bead portion. In other words, it is necessary to provide the die with a bead portion avoidance portion formed as a recess. Here, Patent Document 1 is listed as a document related to the prior art. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-330004 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the shape of the bead portion formed by welding is not uniform. In other words, it is difficult to standardize the shape of the bead portion (such as the convex height), and the shape of the bead portion varies to a certain extent. Therefore, it is difficult to determine in advance the appropriate size of the bead portion avoidance portion that needs to be provided in the mold used for insert molding of the welded part. Therefore, measures such as making the size of the bead portion avoidance portion larger are taken to address this issue.

[0006] If the size of the bead avoidance portion is made too large, it will result in a decrease in the strength of the die. If the welded part is made smaller, it will be difficult to insert mold the welded part due to the relationship between the part where the welded part is welded, the part where the welded part is held by the die, and the strength of the die.

[0007] In other words, when insert molding is performed on small welded parts, it becomes difficult to avoid the bead part due to the strength of the mold, dimensional restrictions, etc., which places many restrictions on product design. This requires measures such as increasing the size of the welded parts, which increases the costs of the welded parts, the insert molded products using these welded parts, and the molds.

[0008] An object of the present invention is to provide a welded part that can reduce the restrictions imposed by molds and the like used in insert molding and increase the degree of freedom in product design. [Means for solving the problem]

[0009] A welded part according to one embodiment of the present invention is a welded part having a first member having a first joint and a first recess adjacent to the first joint, a second member having a second joint and a second recess adjacent to the second joint, the second joint being joined to the first joint by welding, and a bead portion formed by the welding and located within the first recess and the second recess.

[0010] In the welded component according to this aspect of the present invention, at least a portion of the bead portion is contained within the first recess and the second recess.

[0011] In a welded part according to an embodiment of the present invention, at least a portion of the first member is formed in a flat plate shape, the first joint portion and the first recess are formed in the flat portion of the first member, at least a portion of the second member is formed in a flat plate shape with a thickness equal to that of the flat portion of the first member, the second joint portion and the second recess are formed in the flat portion of the second member, and the flat portion of the first member and the flat portion of the second member are aligned with each other in the thickness direction.

[0012] In addition, in a welded part according to an aspect of the present invention, the first member is configured to include a first member main body and a first terminal portion, the flat portion of the first member is configured as at least a part of the first member main body, and the first terminal portion protrudes from the flat portion of the first member in a predetermined direction among directions in which the flat portion of the first member is deployed. Effect of the Invention

[0013] According to the present invention, it is possible to provide a welded component that reduces the restrictions imposed by molds and the like used in insert molding and increases the degree of freedom in product design. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a part of an insert molding product in which a welded part according to an embodiment of the present invention is used; [Diagram 2] FIG. 2 is a perspective view showing a part of a welded part according to an embodiment of the present invention. [Diagram 3] FIG. 3 is an enlarged view of part III in FIG. [Figure 4] FIG. 4 is a perspective view corresponding to FIG. 3 and showing a part of a welded part according to a modified example. [Diagram 5] 3 and 4, and FIG. 4(b) is a cross-sectional view taken along line VB-VB in FIG. [Figure 6]FIG. 2 is a diagram showing a welded part and a mold according to an embodiment of the present invention. [Figure 7] FIG. 13 is a diagram showing a welded part and a mold according to a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A welded component (welded structure of components) 1 according to an embodiment of the present invention is configured to include a first metallic component (first base material; e.g., a bus bar) 3 and a second metallic component (second base material; e.g., a shunt) 5, as shown in Figures 1 to 6.

[0016] The first member 3 is provided with a first joint 7 and a first recess 9 adjacent to the first joint 7. The second member 5 is provided with a second joint 11 and a second recess 13 adjacent to the second joint 11.

[0017] The second joint portion 11 of the second member 5 is joined to the first joint portion 7 by welding (for example, butt welding) so that the first recess 9 and the second recess 13 are connected to each other. As a result, the first member 3 and the second member 5 are welded and connected to each other to be integrated.

[0018] By welding the first joint portion 7 and the second joint portion 11 to each other, a bead portion (weld bead; weld build-up portion) 15 is formed in the welded part 1. The bead portion 15 is contained within the first recess 9 and the second recess 13.

[0019] A resin part 19 (see FIG. 1) is integrally provided between the first member and the second member, for example, by insert molding using a mold 17 (see FIG. 6). An insert molded product is formed by providing the resin part 19 in the welded part 1. An example of the insert molded product is a terminal such as a male terminal or a female terminal.

[0020] For ease of explanation, a given direction in space is defined as the X direction, a given direction perpendicular to the X direction is defined as the Y direction, and a direction perpendicular to the X and Y directions is defined as the Z direction.

[0021] At least a part of the first member 3 is formed in a flat plate shape. That is, at least a part of the first member 3 is the first member flat plate portion 21. The first joint portion 7 and the first recess 9 of the first member 3 are formed in the first member flat plate portion 21. At least a part of the second member 5 is also formed in a flat plate shape. That is, at least a part of the second member 5 is also formed in the second member flat plate portion 23. The second joint portion 11 and the second recess 13 are formed in the second member flat plate portion 23.

[0022] Here, the first member flat portion 21 and the second member flat portion 23 will be further described assuming that the first recess 9 and the second recess 13 are not provided. The thickness direction of the first member flat portion 21 and the thickness direction of the second member flat portion 23 coincide with each other and are in the Y direction. The thickness dimension value of the first member flat portion 21 and the thickness dimension value of the second member flat portion 23 coincide with each other. Furthermore, in the Z direction, the position of the first member flat portion 21 and the position of the second member flat portion 23 coincide with each other, for example.

[0023] Since the thickness direction of the flat portion 21 of the first member and the thickness direction of the flat portion 23 of the second member are positioned relative to each other, the expansion direction of the flat portion 21 of the first member and the expansion direction of the flat portion 23 of the second member are the X direction and the Z direction.

[0024] As shown in FIG. 5, one surface in the thickness direction of the first member flat portion 21 is referred to as the first member first plane 25. One surface in the thickness direction of the second member flat portion 23 is referred to as the second member first plane 27. The first member first plane 25 and the second member first plane 27 exist on one plane (within one plane). The other surface in the thickness direction of the first member flat portion 21 is referred to as the first member second plane 29. The other surface in the thickness direction of the second member flat portion 23 is referred to as the second member second plane 31. The first member second plane 29 and the second member second plane 31 exist on another plane (within another plane).

[0025] Next, the first joint 7, the first recess 9, the second joint 11, and the second recess 13 will be further described assuming that the first recess 9 and the second recess 13 are provided. The first joint 7 is formed on an end face (plane perpendicular to the X direction) of the flat portion 21 of the first member. The first recess 9 is provided at an end of the flat portion 21 of the first member. The second joint 11 is formed on an end face (plane perpendicular to the X direction) of the flat portion 23 of the second member. The second recess 13 is provided at an end of the flat portion 23 of the second member.

[0026] In the welded part 1, the first recess 9 and the second recess 13 are connected to each other. The first recess 9 and the second recess 13, which are connected to each other, surround a welded portion (including a bead portion 15) where the first joint portion 7 and the second joint portion 11 are connected to each other. For example, when viewed in the Y direction, the welded portion is located inside the first recess 9 and the second recess 13.

[0027] The first recess 9 and the second recess 13 are provided on both sides or one side in the thickness direction (Y direction) of the first member flat portion 21 and the second member flat portion 23. Note that Figs. 1 to 5 show an embodiment in which the first recess 9 and the second recess 13 are provided on both sides in the thickness direction of the first member flat portion 21 and the second member flat portion 23.

[0028] A mode in which the first recess 9 and the second recess 13 are provided on both surfaces in the thickness direction of the first member flat portion 21 and the second member flat portion 23 is referred to as a double-sided recess formation mode. A mode in which the first recess 9 and the second recess 13 are provided on only one surface in the thickness direction of the first member flat portion 21 and the second member flat portion 23 is referred to as a single-sided recess formation mode.

[0029] In the double-sided recess formation mode, the first recess 9 and the second recess 13 are recessed from the first member first plane 25 and the second member first plane 27, and are also recessed from the first member second plane 29 and the second member second plane 31. The thickness dimension of the portion of the welded part 1 where the first recess 9 and the second recess 13 are provided is smaller than the thickness dimension of the portion where the first recess 9 and the second recess 13 are not provided.

[0030] In the one-sided recess formation mode, the first recess 9 and the second recess 13 are recessed from the first member first plane 25 and the second member first plane 27, but are not recessed from the first member second plane 29 and the second member second plane 31.

[0031] The first member 3 is configured to include a first member main body portion 33 and a first terminal portion 35, and the first member flat portion 21 is configured to include at least a portion of the first member main body portion 33. The second member 5 is also configured to include a second member main body portion 37 and a second terminal portion 39, and the second member flat portion 23 is configured to include at least a portion of the second member main body portion 37.

[0032] The first terminal portion 35 protrudes a predetermined length from the first member flat portion 21 in a predetermined direction (Z direction) among the deployment directions of the first member flat portion 21. Furthermore, the first terminal portion 35 protrudes from the first member flat portion 21, for example, near the first joint portion 7 and the first recess 9 (near the welded portion).

[0033] The second terminal portion 39 protrudes a predetermined length from the second member flat portion 23 in a predetermined direction (Z direction) among the directions in which the second member flat portion 23 is deployed. The second terminal portion 39 protrudes from the second member flat portion 23, for example, in the vicinity of the second joint portion 11 and the second recess 13 (in the vicinity of the welded portion). The first terminal portion 35 and the second terminal portion 39 are parallel to each other.

[0034] The welded part 1 will be described in more detail with reference to FIG. 5 and the like. The first member flat portion 21 of the first member 3 is formed, for example, in a rectangular flat plate shape. The first joint 7 is formed at an end surface of the first member flat portion 21. The end surface forming the first joint 7 is perpendicular to the X direction and extends elongated in the Z direction. The first recess 9 is formed in a rectangular parallelepiped shape elongated in the Z direction.

[0035] By providing the first recess 9, two rectangular planes 41, 43 elongated in the Z direction are formed at the end of the first member flat portion 21. In the double-sided recess formation embodiment, the first recess 9 is provided on both sides in the thickness direction of the first member flat portion 21, so that the two planes 41, 43 are also provided as a pair, as shown in Fig. 5(a) etc.

[0036] The plane 41A provided on the first member first plane 25 side of the first member flat portion 21 is adjacent to the first joint 7 and is perpendicular to the Y direction. The plane 43A provided on the first member first plane 25 side of the first member flat portion 21 is between the plane 41 and the first member first plane 25, is adjacent to the plane 41A and the first member first plane 25, and is perpendicular to the X direction.

[0037] The plane 41B provided on the first member second plane 29 side of the first member flat portion 21 is adjacent to the first joint 7 and is perpendicular to the Y direction. The plane 43B provided on the first member second plane 29 side of the first member flat portion 21 is between the plane 41B and the first member second plane 29, is adjacent to the plane 41B and the first member second plane 29, and is perpendicular to the X direction.

[0038] The second member flat portion 23 of the second member 5 is also formed, for example, in a rectangular flat plate shape. The second joint 11 is formed at an end surface of the second member flat portion 23. The end surface forming the second joint 11 is perpendicular to the X direction and extends elongated in the Z direction. The second recess 13 is formed in a rectangular parallelepiped shape elongated in the Z direction.

[0039] By providing the second recess 13, two rectangular planes 45, 47 that are elongated in the Z direction are formed at the end of the second member flat portion 23. In the double-sided recess formation embodiment, the second recess 13 is also provided on both sides in the thickness direction of the second member flat portion 23, so that the two planes 45, 47 are also provided as a pair, as shown in Fig. 5(a) etc.

[0040] The plane 45A provided on the second member first plane 27 side of the second member flat portion 23 is adjacent to the second joint 11 and perpendicular to the Y direction. The plane 47A provided on the second member first plane 27 side of the second member flat portion 23 is between the plane 45A and the second member first plane 27, is adjacent to the plane 45A and the second member first plane 27, and is perpendicular to the X direction.

[0041] The plane 45B provided on the second member second plane 31 side of the second member flat portion 23 is adjacent to the second joint 11 and is perpendicular to the Y direction. The plane 47B provided on the second member second plane 31 side of the second member flat portion 23 is between the plane 45B and the second member second plane 31, is adjacent to the plane 45B and the second member second plane 31, and is perpendicular to the X direction.

[0042] In the welded part 1, the entire surface of the first joint portion 7 and the entire surface of the second joint portion 11 are in contact with each other. In addition, the flat surface 41A and the flat surface 45A are located within a single plane, and the flat surface 41B and the flat surface 45B are located within a single plane.

[0043] Furthermore, in the welded part 1, the first member 3 and the second member 5 are joined to each other, so that the first recess 9 and the second recess 13 are connected to each other, and in the double-sided recess formation embodiment, the first recess 9 and the second recess 13 form a pair of rectangular parallelepiped spaces 49.

[0044] The bead portion 15 is formed in a semi-oval shape. That is, the bead portion 15 is formed in a semi-elliptical shape when viewed in the Z direction, and extends long in the Z direction along each of the joints 7 and 11. In the double-sided recessed form, the bead portion 15 is also provided in pairs. The bead portion 15A on the first member first plane 25 side and the second member first plane 27 side rises in the Y direction from the respective planes 41A and 45A. The bead portion 15B on the first member second plane 29 side and the second member second plane 31 side rises in the Y direction from the respective planes 41B and 45B.

[0045] The width dimension (dimension in the X direction) W2 of the bead portion 15 is equal to or less than the width dimension (dimension in the X direction) W1 of the space 49. The height dimension (dimension in the Y direction) H2 of the bead portion 15 is equal to or less than the height dimension (dimension in the Y direction) H1 of the space 49.

[0046] 5 indicates the outer surfaces of the members 3 and 5 before welding. Due to welding, the boundaries between the first member 3, the second member 5, and the bead portion 15 are somewhat unclear in the portions indicated by the dashed lines.

[0047] As shown in FIG. 1 etc., the first terminal portion 35 is formed in a rectangular prism shape elongated in the Z direction. The dimension of the first terminal portion 35 in the Y direction is equal to the dimension of the first member flat portion 21 in the Y direction. The positions of the first terminal portion 35 and the first member flat portion 21 in the Y direction coincide with each other. The dimension of the first terminal portion 35 in the Y direction may be slightly smaller than the dimension of the first member flat portion 21 in the Y direction. In this case, the first terminal portion 35 is located inside the first member flat portion 21 in the Y direction.

[0048] The second terminal portion 39 is also formed in a rectangular prism shape elongated in the Z direction. The dimension of the second terminal portion 39 in the Y direction is equal to the dimension of the second member flat portion 23 in the Y direction. The positions of the second terminal portion 39 and the second member flat portion 23 in the Y direction coincide with each other. The dimension of the second terminal portion 39 in the Y direction may be slightly smaller than the dimension of the second member flat portion 23 in the Y direction. In this case, the second terminal portion 39 is located inside the second member flat portion 23 in the Y direction.

[0049] The first terminal portion 35 and the second terminal portion 39 protrude, for example, on the same side and by the same length from the first member flat portion 21 and the second member flat portion 23. In the Z direction, the first terminal portion 35 and the second terminal portion 39 are located at the same position.

[0050] The resin part 19 is provided integrally with the welded part 1 such that a cavity is formed around the first terminal part 35 and the second terminal part 39. The resin part 19 is also provided in the space 49 excluding the bead part 15. The resin part 19 is provided in the welded part 1 by using a mold 17 after the first member 3 and the second member 5 are welded together to obtain the welded part 1.

[0051] In the above description, the welded part 1 is composed of the first member 3 and the second member 5, but the welded part 1 may be formed by welding three or more members together. For example, as shown in Fig. 2, a third member 51 may be welded to the second member 5. The welded connection between the second member 5 and the third member 51 is similar to the welded connection between the first member 3 and the second member 5.

[0052] The welded part 1 is configured to include a first member 3 provided with a first joint 7 and a first recess 9, a second member 5 provided with a second joint 11 and a second recess 13, and a bead portion 15 formed by welding. The bead portion 15 is fitted inside the first recess 9 and the second recess 13.

[0053] Since the bead portion 15 is contained within the first recess 9 and the second recess 13, there is no obstructive protrusion of the bead portion 15 (protrusion that obstructs the mold 17). Furthermore, even if there is variation in the shape and size of the bead portion 15 formed by welding, this can be ignored. This reduces the constraints of the mold 17 used when insert molding the welded part 1, and increases the freedom of product design. In other words, it becomes easier to hold the welded part 1 in the mold 17, and the insert moldability of the welded part 1 is improved.

[0054] In addition, even if the strength of the mold 17 used when insert molding the small welded part 1 is ensured and dimensional constraints are reduced, it becomes easy to avoid the bead portion 15, and constraints on the product design of terminals, etc. are reduced.

[0055] Furthermore, measures such as increasing the size of the welded part 1 are no longer necessary, and it is possible to suppress increases in the costs of the welded part 1, the insert molded product using this welded part 1, and the mold 17. It is also possible to improve the durability of the mold 17 and simplify the configuration of the mold 17.

[0056] 7, in welded part 301 according to the comparative example, plate materials 303 and 305 are welded together to form a raised bead portion (welded portion) 307 at the welded portion. When insert molding is performed on welded part 301 with bead portion 307 formed therein using mold 309, welded part 301 needs to be held by mold 309.

[0057] When the welded part 301 is held by the metal mold 309, it is necessary to avoid the bead portion 307. That is, the metal mold 309 needs to be provided with a bead portion avoidance portion 311 formed as a recess.

[0058] However, the shape of the bead portion 307 formed by welding is not uniform. The shape and size of the bead portion 307 vary to a certain extent. Therefore, it is difficult to determine in advance the appropriate size of the bead portion avoidance portion 311 that needs to be provided in the mold 309. Therefore, measures such as making the size of the bead portion avoidance portion 311 larger are taken to deal with this.

[0059] If the size of the bead portion avoidance portion 311 is made too large, it will result in a decrease in the strength of the die 309. In particular, if the welded part 301 is made smaller, it will be difficult to insert mold the welded part 301 due to the relationship between the portion of the welded part 301 that is welded, the portion of the welded part 301 that is held by the die 309, and the strength of the die 309.

[0060] In the welded part 1, the first member flat portion 21 and the second member flat portion 23 are aligned in their thickness direction. This allows the portion of the mold 17 used for insert molding that holds the first member flat portion 21 and the second member flat portion 23 to be formed from a pair of parallel planar portions, simplifying the shape of the mold 17.

[0061] The first member 3 is, for example, a bus bar, and the second member 5 is, for example, a shunt, and the precision (tolerance) of the thickness dimension of the first member flat portion 21 and the thickness dimension of the second member flat portion 23 is ±0.02 mm. Therefore, the members 3 and 5 can be easily held in the mold 17 without causing any problems.

[0062] In the welded part 1, the first terminal portion 35 (second terminal portion 39) protrudes from the first member flat portion 21 (second member flat portion 23) in a predetermined direction among the protruding directions of the first member flat portion 21 (second member flat portion 23). As a result, the terminal portions 35, 39 have a shape in which the flat portions 21, 23 are simply extended straight. Since the terminal portions 35, 39 have such a simple shape, the shape of the mold 17 used when insert molding the welded part 1 can be further simplified.

[0063] Furthermore, in the welded part 1, the bead portion 15 is contained within each of the recesses 9, 13, so that the vicinity of the welding points of the members 3, 5 can be held by the die 17. This ensures the strength of the die (resin molding die) 17 used for insert molding, even if the terminal portions 35, 39 are located near the welding points.

[0064] That is, resin is not directly provided by insert molding to each of the terminal portions 35, 39. Therefore, the mold 17 can hold each of the terminal portions 35, 39 and the portions of each of the members 3, 5 connected to each of the terminal portions 35, 39 (portions in the vicinity of the welded portions of each of the members 3, 5). This increases the rigidity of the mold 17.

[0065] Incidentally, as shown in Fig. 4 and Fig. 5, at least a part of the bead portion 15 may be contained within the first recess 9 and the second recess 13. For example, the bead portion 15 may be contained within the recesses 9, 13 only at the portions of the welded portions of the first member 3 and the second member 5 on the side of the terminal portions 35, 39 (see Fig. 5(a)). At other welded portions, the recesses 9, 13 may not be provided and the bead portion 15 may protrude (see Fig. 5(b)). Note that the bead portion 15 may be contained within the recesses 9, 13 at all welded portions (see Fig. 2).

[0066] Since a part or all of the bead portion 15 is contained within the first recess 9 and the second recess 13, insert molding can be performed using a mold 17 that is appropriately suited to the shape of the welded part 1, etc.

[0067] For example, in an embodiment in which a portion of the bead portion 15 is contained within the first recess 9 and the second recess 13, the above-mentioned effects can be obtained, such as reducing the constraints of the mold 17 while ensuring the strength of the welded part 1.

[0068] Furthermore, in the case where the entire bead portion 15 is contained within the first recess 9 and the second recess 13, it is possible to obtain the above-mentioned effects, such as reducing the constraints of the mold 17, while completely eliminating any unnecessary protrusions due to the bead portion 15 on the welded part 1.

[0069] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment. [Explanation of symbols]

[0070] 1 Welding parts 3. First Component 5 Second component 7 First Joint 9 First recess 11 Second Joint 13 Second recess 15 Bead section 21 First member flat portion (first member flat portion) 23 Second member flat portion (flat portion of the second member) 33 First member body 35 First terminal part

Claims

[Claim 1] a first member having a first joint and a first recess adjacent to the first joint; a second member including a second joint portion and a second recess portion adjacent to the second joint portion, the second joint portion being joined to the first joint portion by welding; a bead portion formed by the welding and disposed within the first recess and the second recess; having At least a portion of the bead portion is contained within the first recess and the second recess, At least a portion of the first member is formed in a flat plate shape, the first joint portion and the first recess portion are formed in a flat portion of the first member, At least a portion of the second member is formed in a flat plate shape with a thickness equal to that of the flat plate portion of the first member, the second joint portion and the second recess portion are formed in a flat portion of the second member, the flat-plate-shaped portion of the first member and the flat-plate-shaped portion of the second member are aligned with each other in a thickness direction thereof, the first member is configured to include a first member body portion and a first terminal portion, and the flat portion of the first member is configured as at least a part of the first member body portion; the first terminal portion protrudes from the flat portion of the first member in a predetermined direction among directions in which the flat portion of the first member is expanded, a plane perpendicular to a width direction of the bead portion and a plane perpendicular to a height direction of the bead portion are formed in each of the first recess and the second recess, a width direction of the bead portion is a direction perpendicular to the first joint portion and the second joint portion, A welded component, wherein a height direction of the bead portion is a thickness direction of the flat plate-shaped portion of the first member and the flat plate-shaped portion of the second member.

Images