JP2007090362A - Hollow shape pair for friction welding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure spring in a balanced manner during fitting for friction welding, to prevent a local high rigidity part from vainly being produced, and to facilitate performance of the friction welding. <P>SOLUTION: There are an abutting part 13 of the front plates 1, 1 and an abutting part 14 of the back plates 2, 2 in the joining ends 11a, 12a of a hollow shape pair 11, 12. These abutting parts 13, 14 receive friction welding load, for which two types of prop sections are provided alternatively to accomplish the friction welding. One type is a combined prop section 15 which is a combination of prop sections 15a, 15b each from one side and the other side of the hollow shapes 11, 12 respectively. The other type consists of single prop sections 16, 17 which share the friction welding load by each singly receiving it between the front and the back plate 1, 2 at the joining ends 11a, 12a of the hollow shapes 11, 12, namely, between the abutting part 13 and the back plate intermediate part 13b each on the hollow shape 11 side and between the abutting part 14 and the front plate intermediate part 14b each on the hollow shape 12 side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hollow shape material pair for friction joining suitable for forming a wide-area wall structure, for example, each structure of a railway vehicle with a double skin structure.

  Railway vehicles are required to be lighter for higher speed and to have higher rigidity to cope with safety, and cost reduction is also desired. In response to this, a hollow aluminum material is used in which the front and back plates are connected by a plurality of connecting plates, which are joined by friction bonding to form a structure with a predetermined width. (For example, refer to Patent Documents 1 to 4). Friction welding is mainly called Friction Stir Welding and is translated into friction stir welding or friction stir welding. The specific method is that a tool having a projection called a probe at the tip is rotated and pushed into the joined part, and the material softened by frictional heat is stirred (plastic fluidized) and joined. In other words, since it is not solid-state welding but solid phase bonding, the metal structure becomes a strongly processed and refined structure and is excellent in mechanical properties. For example, low strain bonding that does not melt the material can be achieved, the working environment can be improved, and energy can be saved. Moreover, skill is unnecessary.

However, in order to friction-join the front and back plates of hollow shapes by using such a joining method, the front and back plates are butted against each other, and the probe is applied to the butted portion from the outside. While rotating and pressing a tool with a lip, it will move relative to each other along the abutting part, but if there is a relief at the abutting part between the front and back plates, a sufficient frictional effect and stirring effect can be obtained. I can't. Therefore, in all of Patent Documents 1 to 4, in order to frictionally join the hollow shape front plates and the back plates to each other, the connecting plate is used to connect the butted portions between the front and back plates of the hollow shape material. We provide a hollow material for friction welding that is supported by the tension, that is, buckling strength.
Japanese Patent No. 3228468 Japanese Patent No. 3228467 Japanese Patent No. 3282725 Japanese Patent No. 3459197

  However, in the hollow profile where the connecting plates are arranged in a truss structure in which upright triangles and inverted triangles are alternately arranged, the butted portions of the front plates and the butted portions of the back plates face each other in the direction in which the friction welding load acts. In the case of mutual connection, a friction joint load support is provided at the joint end of one hollow profile as described in Patent Document 1 in the middle of the triangular connecting plate provided at the joint end of the hollow profile pair to be coupled. If a connection plate for friction welding load support is provided at both ends of the joints of each hollow profile as described in Patent Document 2, local high rigidity is required. The rigidity balance of the whole area is likely to be lost in areas other than the area where The same applies to the case where the joint ends having the connection plates of both hollow shapes normally arranged as described in Patent Documents 3 and 4 are frictionally joined to each other. It can be effectively used only by selecting and applying a special portion requiring rigidity.

  In addition, as described in Patent Documents 2 to 4, when the hollow shape members having the connecting plates at both joining end portions are abutted against each other and friction joined, the front plate mating end and the back plate in both the hollow shape materials The connecting plate is located very close between the butting ends of the mating parts, and mating at the fitting part to make it easier to support the mating part of the front and back plates and the butting part of the back plates with the support plate and connecting plate However, there is a problem in that it is difficult to obtain spring properties and fitting becomes difficult, or there is a gap in the fitting portion, which may affect the friction welding. In the thing of patent document 1, one which does not have a connection board in a pair of front board and back board in a junction end part becomes a free end piece which shows spring property, but the remaining three have spring nature with a connection plate. Therefore, there is a problem that even if the fitting utilizing the elastic deformation can be performed, the shape and the joining state due to the elastic deformation tend to be biased.

  It is an object of the present invention to ensure a good balance of spring properties during fitting for friction bonding, and to perform friction welding successfully without becoming a partial high rigidity portion. It is to provide a pair of hollow profile members.

  In order to achieve the above-described problems, the pair of hollow members for friction bonding according to the present invention includes a pair of hollow members in which the front and back plates are connected to each other by a plurality of connecting plates and are hollow. The front and back plates of each other are joined to each other and frictionally joined by the pressing of the rotor from the direction perpendicular to the surface, and the front plate and the back plate meet at the joint ends. Between the one side of the hollow shape member and the other side of the other hollow shape member, and the combination of the one or the other Between the front and back plates at each joint end of the hollow shape member and the other hollow shape member, the friction welding load on the butt portion of the front plates and the friction joint negative on the butt portion of the back plates Is divided between the abutting portion of the front plate and the middle portion of the back plate in one hollow shape member, and between the abutting portion of the back plate and the middle portion of the front plate on the other hollow shape material side One feature is the provision of a single strut.

  In such a configuration, a combination strut portion between the butted portion of the front plates and the butted portions of the back plates at the joining end portion of the pair of hollow shapes between the front plates, and the one hollow shape side There will be at least one of a single stretched portion between the butted portion and midway portion of the front and back plates and between the butted portion and midway portion of the front and back plates on the other hollow shape member side.

  Depending on the combination struts, one strut of one hollow profile and the other strut of the other hollow profile may be between the butted part of the front plate and the back plate of the pair of hollow profiles. The front and back plates, for example, the front plate and the back plate, in combination with each other, guaranteeing sufficient frictional bonding by cooperating and receiving any friction welding load between the butted portion of the front plates and the butted portion of the back plates. As one unconnected support plate in a free orientation that is perpendicular to or inclined between them, the arrangement balance with other connection plates can be achieved in any way. Also, because of its non-connected structure, the front plate and the back plate are not restricted in the direction of separation between the front plate and the back plate, so that both the front plate and the back plate at the joint end of one hollow profile, or the joint end of the one hollow profile. Both the back plate and the front plate of the other hollow shape member are free end pieces that can exhibit spring properties at least without restraining the strut structure, and the combined struts are the butted portions and back plates of the front plates Easy fitting using the spring property in the fitting portion between the joining end portions for receiving the friction welding load at both the butting portions can be achieved with elastic deformation having a good front / back balance. In addition, at the time of this fitting, the combined struts are extended between the front plate and the back plate by using the approaching operation of the one struts and the other struts to the strut positions in the combination struts, and there is a gap in the fit. Even if this occurs, it can be eliminated, and the occurrence of escape during friction welding can be prevented.

  In addition, depending on the single strut, the one side single strut in the middle of the front plate of one of the hollow members can receive the frictional joint load applied to the strut between the back plates independently. The other side single-sided stretch part in the middle part of the back plate of the hollow shape material of each other is shared with each abutting part so that the frictional joint load applied to the abutting part between the front plates is received alone. The direction in which the butt portion between the front plates and the butt portion between the front plates for the friction welding works in the friction welding load while guaranteeing sufficient friction welding in both cases of front and back friction welding By being able to be displaced with respect to the position, it is easy to balance the arrangement with other connecting plates. In addition, the one-side single-stretched portion in the middle part of the front plate of one hollow shape member is a free end piece that extends to the butted portion between the front plates to the front plate at the joining end portion and exhibits springiness The other single-side stretched portion in the middle of the back plate of the other hollow shape member is a free end piece that extends to the back plate at the joining end portion to the butted portion of the back plates and exhibits springiness. Since each of the single struts can share the friction joint load at both the abutting portions of the front and back plates and the abutting portions of the back plates, the fitting between the joint ends is received. Easy fitting using the spring property at the part can be achieved with elastic deformation with a good balance between the front and back.

  Furthermore, when such a combination strut and a single strut are used in combination, they are arranged in a V-shape with the abutting portions between the front plates and the abutting portions between the back plates as a boundary. Each of the above characteristics can be exhibited by balancing the form and position of the arrangement with the connecting plate having an upright triangle or inverted triangle truss structure.

  The combination strut portion is located between the abutting portion of the front plates facing each other in the direction in which the friction welding load acts and the abutting portion of the back plates, and at the abutting portion, the joining end of one hollow shape member A pair of opposed ribs extending inward from the front plate and the back plate of the opposite portion and facing each other, and the opposite rib pair extending from the joint end of the other hollow member and facing toward the one hollow member It can be set as a combination with the other side extension part which consists of the protruding rib which protruded so that it might fit in between.

  In such a configuration, the pair of opposing ribs, which are the one-side struts in one hollow shape member, is between the abutting portion between the front plates and the abutting portion between the back plates facing each other in the direction in which the friction welding load acts. Is positioned to receive the frictional joint load by fitting with the projecting rib from the other hollow shape member which is the other side of the other hollow shape member, between the front plate and the back plate By satisfying the condition of being not constrained in the direction of leaving, it is possible to provide a free end piece on the front plate side and a free end piece on the back plate side that act as a spring at the joining end portion of one hollow profile, Since the protruding rib pair extending from the joint end of the hollow shape member is also provided without the connecting plate that connects the front and back plates, the butt portion of the pair of hollow shape members between the front plate and the back plate is abutted Local to the club It is not such that high rigidity.

  Further, the combination strut portion is located between the abutting portion of the front plates and the abutting portion of the back plates facing each other in the direction in which the friction welding load acts, and is swung to one side of these abutting portions. A connecting plate between the front plate and the back plate, a one-side strut formed of a pair of opposed ribs extending from the connecting plate so as to face each other inwardly while being swung to the other side, and the other hollow shape member A combination with the other side protruding portion which is a protruding rib extending from the joint end portion and protruding toward the one hollow shape member side so as to fit between the opposed rib pairs.

  In such a configuration, the one side stretched portion provided in one hollow profile extends from the nearest connecting plate, and is located evenly on both sides of the friction joint with the nearest connecting plate, and the other stretched portion and When the combination butt part is formed, a hollow part that receives the friction welding load is formed in cooperation with the nearest connecting plate, so that a heat storage structure part that stores heat during the friction welding and adversely affects the friction welding can be formed. High receiving strength can be obtained without any problem. Further, the combination of the opposing rib pair and the nearest connecting plate reduces the local increase in rigidity compared to the case where the two connecting plates are adjacent to each other. This can be achieved by setting the position to a position appropriately separated from the connecting plate adjacent to them.

  Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.

  According to the hollow profile pair for friction bonding of the present invention, depending on the combination of the stretched portions, the friction bonding load at each butted portion of the front and back plates is received to ensure sufficient friction bonding, and between the front and back plates. As one connecting plate in a free orientation, it is possible to balance the arrangement with other connecting plates, and it is wasted in terms of strength, making the structure complicated and heavy, and creating locally high rigidity parts. Can be prevented. In addition, free end pieces having spring properties are obtained on at least one front and back of the joining end of each hollow shape member without restraining the separation between the front and back plates, and the friction joining load is received. In order to fit the fitting portions to be easily fitted, elastic deformation with a good balance between the front and back can be easily achieved without any deviation in strength or shape. In addition, when entering the position where the one-side struts and the other-side struts in this fitting are in tension, the combination struts obtain an expansion action between the front plate and the back plate to eliminate the gap in the fitting. It is possible to avoid the escape at the time of friction welding and to achieve the friction welding successfully.

  Also, depending on the single strut, the other single strut on the middle of the front plate of one hollow profile is on the other end of the back plate of the other hollow profile on the other side The butt portion between the front and back plates is the front and back, while the single butt portion on the side works against the butt portion between the front and back plates independently to ensure sufficient friction welding. Dispersed by shifting in the plane direction of the plate, it is easy to balance the arrangement with other connecting plates, it is wasted in terms of strength, and the structure becomes complicated and heavy, and local high rigidity parts can be created. Can be prevented. In addition, one hollow profile member has a spring-bonded joint end piece on one side of the single-stretched portion, and the other hollow profile member has a spring-bonded joint end piece on the other side. Can be easily achieved with elastic deformation with a good balance between the front and back without fitting the strength distribution and the shape in order to fit the fitting portions for securing each of them and easily receiving the frictional joint load.

  Furthermore, in the combined use of the combined struts and the single struts, they are connected in the form of an upright triangle or an inverted triangle as a V-shaped arrangement with the front plate side butting portion and back plate side butting portion as a boundary. By taking a balance with the form and position of the arrangement with the plate, each of the above characteristics can be exhibited without a local high-rigidity part or weighting part.

  Embodiments according to the hollow profile pair for friction bonding of the present invention will be described in detail with reference to FIGS. 1 to 5 to provide an understanding of the present invention.

  The pair of hollow members for friction bonding of the present embodiment includes front and back surfaces such as the example shown in FIG. 1, the example shown in FIG. 2, the example shown in FIG. 3, the example shown in FIG. 4, and the example shown in FIG. The plates 1 and 2 are connected by a plurality of connecting plates 3 to have a pair of hollow members 11 and 12 having various hollow shapes having one or more hollow portions 4. The pair of hollow shapes 11 and 12 are friction joints between the joint end portions 11a and 12a, that is, friction stir welding or friction stir welds. It refers to a pair of friction bonded. Therefore, they need not be the same. The hollow shape members 11 and 12 are mainly extruded shapes made of an aluminum-based metal, that is, aluminum or an aluminum alloy, but are not particularly limited thereto. The hollow shape members 11 and 12 are generally about 3 to 5 mm for the front and back plates 1 and 2 and about 1.8 to 2 mm for the connecting plate 3, but are not limited thereto.

  In the example shown in FIG. 1, the example shown in FIG. 2, the example shown in FIG. 3, and the example shown in FIG. 5, one hollow shape member 11 and the other hollow shape member 12 are the plates 1 and 2 on the front and back sides thereof. Are joined to each other so as to be frictionally joined by pressing a rotor (not shown) from the direction A perpendicular to the plane indicated by the arrows. Between the butted portion 13 between the front plates 1 and the butted portion 14 between the back plates 2 at the joining end portions 11a and 12a, the one-side stretched portion 15a of the one hollow profile 11 and the other hollow profile 12 are provided. The other-side struts 15b are combined to provide the combined struts 15 that receive the frictional joint load extending to the abutting portions 13 and 14.

  Depending on the combination struts 15, a pair of hollow profiles 11, 12 may have one hollow profile between the front plate 1, the butted portion 13 between the back plate 2 and the butted portion 14. 11 side one-side stretched portion 15a and the other hollow-shaped member 12 side other-side stretched portion 15b are combined to form a butt portion 13 between the front plates 1 and 1 and a butt portion 14 between the back plates 2 and 2. Any friction welding load can be received in cooperation to ensure sufficient friction welding. Moreover, the combination struts 15 are arranged in a direction perpendicular to those between the front plate 1 and the back plate 2 as in the example shown in FIG. 1, the example shown in FIG. 3, the example shown in FIG. It can function as one non-connecting support plate 3a in a free orientation, such as the direction inclined to the front plate 1 and the back plate 2 as shown in the example, and the balance of arrangement with the other connecting plates 3 It can also be planned.

  Also, regardless of the orientation, the one-side stretched portion 15a and the other-side stretched portion 15b do not restrain each other in the direction in which the front plate 1 and the back plate 2 are separated from each other. 1, both the front plate 1 and the back plate 2 at the joining end 11a of one hollow profile 11 in the example shown in FIG. 1, and the front plate 1 at the joining end 12a of the other hollow profile 12 in the example shown in FIG. Both the back plate 2, as in the example shown in FIG. 2, both the back plate 2 at the joining end portion 11 a of one hollow shape member 11 and the front plate 1 at the joining end portion 12 a of the other hollow shape member 12, It becomes the free end piece 21 which can exhibit spring property without restraint on at least the stretch structure of the combination strut portion 15, and the combination strut portion 15 is the front plate 1, the butting portion 13 between the back plate 2, and the butting portion 14 between the back plates 2. On the other hand, the spring properties of the free end pieces 21 at the fitting portions 18 and 19 in the surface direction of the front plate 1 and the back plate 2 of the joining end portions 11a and 12a for receiving the friction welding load are utilized. This easy fitting can be achieved with elastic deformation with a good front-back balance by the front and back free end pieces 21. In the example shown in FIG. 1, in particular, both the front plate 1 and the back plate 2 in the joint end portion 11 a of one hollow shape member 11, and both the front plate 1 and the back plate 2 in the other hollow shape member 12. Since both are free end pieces 21 that can exhibit spring properties without being restricted by the butting structure, this is particularly advantageous for fitting the fitting portions 18 and 19.

  In addition, when the fitting portions 18 and 19 are fitted in the surface direction, the combination struts 15 are used to make a combination strut by using the approaching operation of the one strut portion 15a and the other strut portion 15b to the strut positions. The portion 15 is expanded between the front plate 1 and the back plate 2 so that even if a gap is generated in the fitting portions 18 and 19, the clearance is eliminated to prevent escape during friction welding. it can.

  As a result, depending on the combination strut 15, the front and back plates 1, 2 and the butting portions 13, 14 receive a friction welding load and guarantee sufficient frictional bonding, while free between the front plate 1 and the back plate 2. As one connecting plate 3 in the direction, the arrangement balance with the other connecting plate 3 can be achieved, the position is wasted in terms of strength, and the structure is complicated and heavy, and the local high-rigidity part Can be prevented. Moreover, the freedom between the front plate 1 and the back plate 2 of the joint end portions 11a and 12a of the hollow members 11 and 12 is springy and free without restraining the separation between the front plate 1 and the back plate 2. Obtaining the end piece 21 and easily fitting the fitting portions 18 and 19 to easily receive the frictional joint load with elastic deformation with a good balance between the front and back by the free end piece 21 without any deviation in strength distribution or shape. be able to. In addition, when the one-side stretched portion 15a and the other-side stretched portion 15b in this fitting enter the position where they are stretched, the combined stretched portion 15 obtains an expansion action between the front plate 1 and the back plate 2 and the fitting portion It is possible to eliminate the gap in the fitting of 18 and 19 to avoid the escape at the time of friction welding and to achieve the friction welding successfully.

  In order to facilitate such expansion, in the example shown in FIG. 1, the example shown in FIG. 2, the example shown in FIG. 3, and the example shown in FIG. 5, the striking position between the one-side strut 15 a and the other-side strut 15 b An inclined portion 15c that is inclined with respect to the entry direction parallel to the surfaces of the front plate 1 and the back plate 2 is provided at the entry boundary portion, and the wedge action is used to enter the striking position, and the combined tension portion 15 Is trying to expand. Further, this wedge action allows the one side strut portion 15a and the other side strut portion 15b to easily enter the strut position without being caught or interfered at the initial stage of the striking position, and the subsequent one entry. As a result, the combination strut 15 is expanded to provide a press-fit state in which the gap between the fitting portions 18 and 19 is eliminated. In particular, in the example shown in FIG. 2, the one-side stretched portion 15 a and the other-side stretched portion 15 b enter the stretched position, and then in the stretched position, they are stretched in an oblique direction with respect to the entry direction. Protruding end portions 15d and 15e of the mold are provided to prevent the mold from being removed from the striking position.

  On the other hand, in the example shown in FIG. 1, the other side protruding portion 15 b provided in the other hollow shape member 12 is a protrusion protruding from the middle of the connecting plate 3 of the front plate 1 and the back plate 2. 1, if formed as one of the back plate 2, specifically, a portion protruding in a cross-sectional saddle shape from the back surface of the front plate 1 as seen in FIG. Free end pieces 21 are obtained on both the plate 1 and the back plate 2. However, the free end shown with a broken line drawn on the front plate 1 and the back plate 2 by retreating the connecting plate 3 having the protruding other-side protruding portion 15b from the solid line position in FIG. Since the piece 21 is obtained, the fitting at the fitting portions 18 and 19 is not made difficult. Further, even when the connecting plate 3 at the position shown by the phantom line is combined with the combined stretch portion 15, the local high rigidity is reduced as compared with the case where the two connecting plates 3 are adjacent to each other, and for example, it is useful. In the case of forming a locally high-rigidity part that is not a problem, the other side of the connecting plate 3 that is moderately separated from the friction joining position as indicated by a broken line or a solid line that does not cause such a problem This can be dealt with by extending 15b.

  Further, in the example shown in FIG. 3, the one side projecting portion 15 a provided in one hollow shape member 11 is provided extending from the upper and lower sides of one side of the connecting plate 3, and on both sides of the friction joint portion together with the connecting plate 3. The hollow portion 22 is formed so as to receive the frictional joint load in cooperation with the connecting plate 3 when it is located evenly and is located at the other-side strut portion 15b and the combination abutting portion 15. In the configuration in which such a friction bonding load is received by the hollow portion 22, high receiving strength can be obtained without forming a heat storage structure portion that stores heat during friction bonding and adversely affects the friction bonding. In addition, such a combination of the connecting plate 3 and the combination butting portion 15 reduces local rigidity as compared with the case where the two connecting plates 3 are adjacent to each other. When a local high-rigidity part of a certain degree is formed, a local high-rigidity part is formed, which is not useful, and in a case where there is a problem, it can be handled by setting it at a position appropriately separated from the adjacent connecting plate 3. .

  Furthermore, if necessary, using the elasticity of the free end piece 21, it is fitted in a temporarily fixed state that gives various engagement shapes that are hooked in the disconnecting direction to prevent the fitting portions 18 and 19 from being disconnected, Temporary welding or temporary friction bonding for temporary fixing can be eliminated.

  Finally, in the example shown in FIG. 2 and the example shown in FIG. 4, the front and back plates 1, 2 at the joining end portions 11 a, 12 a of one hollow shape member 11 and the other hollow shape member 12, One side single strut for receiving the frictional joint load on the butting portion 13 between the plates 1 and 1 between the butting portion 13 and the middle portion 13b of the front and back plates 1 and 2 at the joining end portion 11a of one hollow shape member 11 alone. Friction welding load that reaches the part 16 and the butting part 14 between the back plate 2 and the back plate 2, alone between the butting part 14 and the middle part 14 b of the front and back plates 1 and 2 at the joining end part 12 a of the other hollow shape member 12. The other-side single-stretching part 17 to receive is provided. According to this, between the front plate 1 and the butted portion 13 and the back plate 2 and the butted portion 14 of the pair of hollow shapes 11 and 12 at the joint end portions 11a and 12a, the combined strut 15 In the front and back plates 1 and 2 on the one hollow profile 11 side, for example, between the butted portion 13 and the middle portion 13b, and in the front and back plates 1 and 2 on the other hollow profile 12 side, for example, the butted portion 14 and halfway. It has at least one of the one-side single-stretched portion 16 and the other-side single-stretched portion 17 between the portions 14b. In the example shown in FIG. 2, both the combined tension portion 15 and the single-side and single-side tension portions 16 and 17 are provided, and the combined tension portion 15 and the single-side single tension portion 16 are combined with the friction bonding load of the butting portion 13. The friction joint load of the butt portion 14 is shared and received by the combined butt portion 15 and the other side single butt portion 17, and both may be of the same strength as the other connecting plates 3, This is particularly advantageous for balancing the whole. In the example shown in FIG. 4, only the one-side and the other-side single tension portions 16 and 17 are provided. In this case, it is a normal form that the single-side and the other-side protruding portions 16 and 17 are provided at right angles in the surface direction of the front plate 1 and the back plate 2 as shown in the figure, but upright triangles and inverted triangles are arranged alternately. Although it is difficult to adopt a balanced truss structure, the arrangement balance of the connecting plates 3 can be easily obtained depending on the arrangement position. However, in some cases, it may be inclined.

  Each of the single-side and single-side stretched portions 16 and 17 in the example shown in FIG. 2 and the example shown in FIG. 4 is also provided in the middle portion 13b of the back plate 2 of the one hollow profile 11. The portion 16 receives the frictional joint load applied between the front plate 1 and the butting portion 13 between the front plates 1 and 1, and the other side single-stretched portion 17 in the middle portion 14 b of the front plate 1 of the other hollow shape member 12 is provided. The back plate 2 and the butt portion 14 between the back plate 2 and each other work in a shared manner so as to receive the friction welding load applied to the back plate 2, while guaranteeing sufficient friction welding in both cases of front and back friction welding. The front plate 1, the butting portion 13 between the front plate 1, the back plate 2, and the butting portion 14 between the two are not opposed to the direction in which the friction welding load acts, and are shifted in the surface direction of the front and back plates 1 and 2. Because of its location, it can be Easy to take the balance. Further, the one-side single-stretched portion 16 in the middle portion 13b of the back plate 2 of the one hollow shape member 11 has a spring property because the back plate 2 extends from the middle portion 13b to the back plate 2 and the butted portion 14 between the two. It is ensured that it becomes a free end piece 21, and the other-side single-stretched portion 17 in the middle portion 14 b of the front plate 1 of the other hollow shape member 12 is formed between the front plate 1 and the front plates 1, 1. Since it is ensured that it extends to the abutting portion 13 and becomes a free end piece 21 having a spring property, each of the one side and the other side independently projecting portions 16 and 17 is the front plate 1, the abutting portion 13 and the back plate 2 of each other, Easy fitting using the spring property at the fitting portions 18 and 19 between the joint end portions 11a and 12a for sharing and receiving the friction welding load at both the butting portions 14 is elastic with a good balance between the front and back. Deformation It can be achieved Te.

  Further, as in the example shown in FIG. 2, in each of the front plate 1, the butted portion 13 between the back plate 2, the back plate 2, and the butted portion 14 between each other, the combined strut portion 15 and the single strut portion on one side and the other side respectively. When one or both of 16 and 17 are used together, they are arranged in a V shape with the front plate 1, the butted portion 13 between the front plate 1, and the butted portion 14 between the back plate 2 and 2 as the boundary. The above-mentioned characteristics can be exhibited by taking a balance with the form and position of the arrangement with the connecting plate 3 having an upright triangle or inverted triangle truss structure.

  The present invention provides a pair of hollow members for friction welding that is effective for forming a structure of a railway vehicle and the like, and provides convenience in the design and friction welding operation.

It is sectional drawing which shows one joining structure example of the hollow shape material pair for friction joining in embodiment of this invention. It is sectional drawing which shows another joining structural example of the hollow shape material pair for friction joining in embodiment of this invention. It is sectional drawing which shows the other example of joining structure of the hollow shape material pair for friction joining in embodiment of this invention. It is sectional drawing which shows the example of another joining structure of the hollow shape material pair for friction joining in embodiment of this invention. It is sectional drawing which shows another example of joining structure of the hollow shape material pair for friction joining in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front plate 2 Back plate 3 Connecting plate 3a Unconnected support plate 11 One hollow shape member 12 The other hollow shape member 11a, 12a Joint end part 13, 14 Butting part 13b, 14b Middle part 15 Combination strut part 15a One side strut Part 15b other side tension part 16 one side individual tension part 17 other side individual tension part 18, 19 fitting part 21 free end part 22 hollow part A surface perpendicular direction

Claims (3)

A pair of hollow shapes in which the front and back plates are connected to each other by a plurality of connecting plates to form a hollow combination, and the front and back plates are brought into contact with each other and frictionally joined by pressing the rotor from a direction perpendicular to the surface. One end of one hollow section and the other end of the other hollow section between the butted parts of the front plates and the butted parts of the back plates at the joined ends. Between the front and back plates at each joint end portion of the combination strut portion where the strut portion is combined to receive the frictional joint load extending to each abutment portion, and one hollow shape member and the other hollow shape member, The friction welding load that extends between the butted parts of the front plates and the friction welding load that hits the butted parts of the back plates are between the butted part of the front plate and the middle part of the back plate in one hollow profile. , Hollow shape member pair for friction bonding, characterized in that a single strut section, which receives the single and shared between between the middle portion of the butt portion and Hyoban of the back plate of the other hollow shape member side. The combined strut is located between the abutting portion of the front plates facing each other in the direction in which the friction welding load acts and the abutting portion of the back plates, and at these abutting portions, at the joining end of one hollow shape member A pair of opposed ribs extending inward from the front plate and the back plate and facing each other, and a pair of opposed ribs extending from the joint end of the other hollow member and facing toward the one hollow member The pair of hollow members for friction joining according to claim 1, comprising a combination with the other side protruding portion which is a protruding rib protruding so as to fit. The combination struts are located between the abutting portions of the front plates facing each other in the direction in which the friction welding load acts and the abutting portions of the back plates, and the front and back surfaces swinging to one side of these abutting portions. From the connecting plate between the plates, a one-sided stretch portion consisting of a pair of opposing ribs extending from the connecting plate so as to face each other inwardly while swinging to the other side, and a joining end portion of the other hollow shape member The pair of hollow members for friction joining according to claim 1, wherein the pair of members are formed by a combination with a projecting rib made of a projecting rib extending so as to extend toward one of the hollow members and fit between the opposing rib pairs. .

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