JP6190752B2 - Manufacturing method of bogie frame for railway vehicles - Google Patents

Description

  The present invention relates to a method for manufacturing a bogie frame for a railway vehicle.

  The railcar bogie frame is arranged along the width direction of the vehicle so as to connect each side beam between a pair of side beams arranged in parallel with each other along the longitudinal direction of the vehicle and the pair of side beams. A horizontal beam.

  2. Description of the Related Art A railcar bogie frame that is lightened by using a horizontal beam pipe made of a metal pipe is known as a component of the horizontal beam. In this case, the side beam and the cross beam pipe are connected by welding. Further, when a plurality of cross beam pipes are used, the rail car bogie frame is reinforced by connecting adjacent cross beam pipes by welding, for example, by connecting beams (also referred to as “reinforcement beams”) which are long members. .

  Hereinafter, the welding method of a horizontal beam pipe and a connecting beam is illustrated using FIG. First, as shown in FIG. 8A, a long member 5Y having an upper plate 51Y and a lower plate 52Y and a pair of side plates (not shown) arranged between the upper plate 51Y and the lower plate 52Y is prepared. . The upper plate 51Y has a long main body 510Y and a skirt base 511Y that protrudes from one end in the longitudinal direction of the main body 510Y toward both sides in the width direction. An end L4 at one end in the longitudinal direction where the skirt base portion 511Y of the long member 5Y is formed is disposed so as to contact the side portion 40 of the transverse beam pipe 4 along the longitudinal direction of the transverse beam pipe 4 (FIG. 8A). ). A bead (welded portion) 56 is formed between the end side L4 and the side portion 40 to weld the cross beam pipe 4 and the long member 5Y (FIG. 8B). Then, further welding is performed along the longitudinal direction of the cross beam pipe 4 from the projecting direction end of the skirt base 511Y with respect to the main body 510Y, and a new welded portion (additional bead 57) is formed so as to be continuous with the bead 56 (FIG. 8 (c)). Thereafter, the additional bead 57 is finished to form a skirt tip 58 having a shape in which the width gradually decreases in the protruding direction of the skirt base 511Y (FIG. 8D). As a result, the connecting beam 5A having the skirt 59 composed of the skirt base 511Y and the skirt tip 58 is formed. The skirt portion 59 is used as a portion that reinforces the welded portion between the horizontal beam pipe 4 and the connecting beam 5A.

  In addition to the horizontal beam pipe 4 and the connecting beam 5A, the horizontal beam may further include a plurality of long members such as a gear receiver and a main motor receiver connected to the side portion of the horizontal beam pipe by welding. Accordingly, in each welded portion of the gear receiver and the main beam receiver of the transverse beam pipe, a skirt may be formed in the same manner as the connecting beam 5A to reinforce each welded portion.

JP 2013-133303 A

  The above-described railcar bogie frame is manufactured by connecting a plurality of long members to a plurality of transverse beam pipes by welding. For this reason, it is advantageous to improve the manufacturing efficiency of the bogie frame for a railway vehicle if the skirt portion can be efficiently formed at the welded portion between each of the long members and the cross beam pipes.

  The present invention has been made in view of the above-described problems, and provides a method for manufacturing a bogie frame for a railway vehicle capable of efficiently forming a skirt portion at a welded portion between a long member and a metal pipe. For the purpose.

  In order to solve the above problem, a method for manufacturing a railcar bogie frame according to an aspect of the present invention includes a main body extending in a first direction, and orthogonal to the first direction from one end side in the first direction of the main body. A long member having a pair of projecting portions projecting from both sides of the main body along the second direction, and the end sides of the projecting portions on the one end side of the long member are defined in the second direction. An arrangement step of arranging along a longitudinal side portion of a long metal pipe extending in the direction, and welding for connecting the one end of the long member including the end side and the side portion of the metal pipe by welding And a finishing step of finishing the side portions of the projecting portions adjacent to both side portions along the first direction of the main body portion, and in the finishing step, the projecting portions from the both side portions of the main body portion. Said each toward the protruding direction of the part By gradually decreasing the width in the first direction of the detection section, to form a skirt for the tip of the projecting direction end of each projection portion after continuous to and finish and the body portion.

  According to the manufacturing method of the above aspect, by finishing the side portions of the projecting portions adjacent to both side portions along the first direction of the main body portion of the long member, Since the skirt having the end in the protruding direction of the protrusion is formed, a welding process for forming the hem by forming an additional bead at the end of the skirt base as in the prior art is unnecessary.

  Moreover, since a pair of protrusion part of a long member is protruded from the main-body part along the 2nd direction orthogonal to a 1st direction from the 1st direction one end side of a main-body part, a long member is along the protrusion direction. It is possible to linearly weld the end side on the one end side in the first direction and the side portion of the metal pipe. Therefore, it is possible to relatively easily form the welded portion between the long member and the metal pipe.

  As is apparent from the above description, according to the present invention, it is possible to provide a method for manufacturing a bogie frame for a railway vehicle that can efficiently form a skirt at a welded portion between a long member and a metal pipe.

It is a perspective view which shows the structure of the bogie frame for rail vehicles which concerns on embodiment. It is an exploded view which shows the partial structure of the bogie frame for rail vehicles. It is a perspective view which shows the structure of a connecting beam. It is a perspective view which shows the structure of a elongate member. It is a step figure of the manufacturing process of the bogie frame for rail vehicles. It is the figure which showed the mode of the manufacturing process of the bogie frame for rail vehicles from the upper direction. (A) is a placement step, (b) is a welding step, (c) is a first finishing step, and (d) is a second finishing step. It is the figure which showed the mode of the manufacturing process of the bogie frame for rail vehicles from the diagonal. (A) is a placement step, (b) is a welding step, (c) is a first finishing step, and (d) is a second finishing step. It is the figure which showed the mode of the manufacturing process of the conventional bogie frame for rail vehicles from the upper direction. (A) is an arrangement | positioning step, (b) is a welding step, (c) is a skirt tip part formation step, (d) is a figure which shows a finishing step, respectively.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show the configuration of a railway vehicle bogie (hereinafter referred to as “bogie”) according to the embodiment. The railcar bogie includes a railcar bogie frame 1 (hereinafter referred to as “cart bogie 1”) and a pair of wheel shafts 2 rotatably supported on the bogie frame. A vehicle body (not shown) is loaded above the carriage via a pillow spring.

  The carriage frame 1 includes a pair of side beams 3 arranged in parallel at a distance from each other, and lateral beams arranged in parallel so as to connect the side beams 3 between the pair of side beams 3. The transverse beam is composed of a transverse beam pipe 4, a connecting beam 5 arranged so as to connect the transverse beam pipes 4 between the transverse beam pipes 4, a gear box suspension receiver 6 and a main housing 6 arranged on the side portion 40 of each transverse beam pipe 4. And an electric motor receiver 7.

  The axle 2 has an axle 20 and a pair of wheels 21 provided on the axle 20. Each side beam 3 is arranged along the longitudinal direction of the vehicle, and each axle 20 arranged in the width direction of the vehicle is rotatably supported between the pair of side beams 3 near both ends in the longitudinal direction.

  The cross beam pipe 4 is composed of a metal pipe (for example, a steel pipe), and is connected to the pair of side beams 3 in the vicinity of both ends in the longitudinal direction. The cross-sectional shape of the cross beam pipe 4 is not limited to a circular shape, and may be a polygonal shape or an elliptical cross-sectional shape.

  As shown in FIG. 3, the connecting beam 5 has a pair of upper and lower plates 51 and 52 having the same shape and arranged to face each other, and a pair of left and right plates arranged between the upper and lower plates 51 and 52. And a side plate 53.

  Each of the upper plate 51 and the lower plate 52 includes a long main body 510 extending in a first direction (front-rear direction: vehicle longitudinal direction), and a second orthogonal to the first direction from both ends of the main body 510 in the first direction. It has four hem portions 511 (also referred to as “plate edges”) protruding from both sides of the main body 510 along the direction (left-right direction: cart width direction). Both end sides in the first direction of the main body 510 and the end sides of the skirts 511 are linearly continued along the second direction. As a result, the connecting beam 5 has four linear ends L1 extending along the second direction across both ends in the first direction of the main body 510 and the ends of the skirt 511. In the connecting beam 5, the end side L <b> 1 is a portion that is disposed along the longitudinal direction of the horizontal beam pipe 4 and serves as a weld line that is connected to the side portion 40 by welding. The upper plate 51 and the lower plate 52 are integrally configured using a metal plate (for example, a steel plate).

  The side plate 53 is a strip-shaped plate body, which is slightly shorter than the lengths of the upper plate 51 and the lower plate 52, and the side portions so that the shapes at both ends in the longitudinal direction can be welded to the side portions 40 of the cross beam pipe 4. It is a shape (for example, arc shape) along the outer surface of 40. The side plate 53 is configured using a metal plate made of the same material as the upper plate 51 and the lower plate 52.

  In the connecting beam 5, the upper plate 51 and the lower plate 52 are disposed so as to face each other, and between the upper plate 51 and the lower plate 52, a pair of side plates 53 disposed in the left-right direction are opposed to the upper plate 51. And it connects with each main-body part 510 in the lower board 52 by welding. Thereby, the connecting beam 5 is formed in a substantially rectangular tube shape as a whole.

  Although the connecting beam 5 is shown as a single unit in FIG. 3, the skirt portions 511 of the pair of connecting beams 5 are connected to the side portions 40 of the pair of transverse beam pipes 4 by welding in the carriage frame 1. It is formed in a state.

  Both the gear box suspension receiver 6 and the main motor receiver 7 are formed of metal plates. A gear device is connected to the gear box suspension receiver 6. The main motor receiver 7 is connected to the main motor of the railway vehicle. As shown in FIG. 2, each of the gear box suspension receiver 6 and the main motor receiver 7 has linear end sides L2 and L3 similar to the end side L1. In the carriage frame 1, the end sides L <b> 2 and L <b> 3 are arranged along the longitudinal direction of the pair of transverse beam pipes 4 and are welded to the side portions 40 of the respective transverse beam pipes 4.

  Next, the manufacturing method of the bogie frame 1 according to the present embodiment will be described with reference to FIGS.

  First, a long member 5X having the configuration shown in FIG. 4 is prepared. The long member 5X is a member that is the base of the connecting beam 5, and is opposed to the left and right between the upper plate 51X and the lower plate 52X having the same shape and arranged opposite to each other, and the upper plate 51X and the lower plate 52X. And a pair of side plates 53 arranged. Since the upper plate 51X and the lower plate 52X have the same shape, the configuration of the upper plate 51X will be described below as a representative. The upper plate 51X has four protrusions 511X for forming the skirt 511 shown in FIG. The protruding portion 511X has a band-like region having a constant width and an R-shaped region that is continuous while gradually increasing the width toward the main body 510, and protrudes from both ends in the first direction of the main body 510 to both sides in the second direction. Has been. The end L1 of the upper plate 51X is one end in the longitudinal direction of the long member 5X including the end of the protrusion 511X, and both ends in the first direction of the main body 510, and the protrusions that are linearly continuous to the ends. It extends over the end of 511X. In addition, although not shown in figure, the end surface in the edge L1 of the elongate member 5X is formed so that it may incline with respect to the thickness direction in order to form a groove.

  Next, using the long member 5X having the above-described configuration, the steps shown in FIG. 5 are sequentially performed to form a pair of connecting beams 5 connected to the pair of transverse beam pipes 4 by welding.

  Specifically, as a placement step, as shown in FIGS. 6A and 7A, the transverse beam pipe 4 is placed so that its longitudinal direction is in the second direction. Then, it arrange | positions so that the edge L1 of the elongate member 5X may contact | connect the side part 40 of the cross beam pipe 4 along a 2nd direction (step S1 of FIG. 5).

  Next, as a welding step, as shown in FIG. 6B and FIG. 7B, one end of the long member 5X in the first direction and the side portion 40 of the cross beam pipe 4 are welded, and the end L1 and A bead 55 is formed between the side portions 40. Although not shown, a bead 55 is also formed between the end side of the lower plate 52X and the side portion 40 by a similar welding method. Thereby, the long member 5X and the cross beam pipe 4 are connected (step S2 in FIG. 5). As a welding method at this time, for example, a known arc welding method such as MAG welding can be used, but it is not limited to this welding method.

  After the welding step, as a first finishing step in FIG. 5, as shown in FIGS. 6C and 7C, the main body portion 510 is adjacent to the pair of side portions M1 along the first direction. The side part of each protrusion part 511X is finished (step S3 of FIG. 5). As a result, the width of each protrusion 511X is gradually reduced as the distance from the main body 510 increases. As a finishing method at this time, for example, gouging can be performed. By gouging, the metal of the protruding portion 511X is partially melted using arc heat, and the melted metal is blown away with compressed air and removed. FIGS. 6C and 7C schematically show the state of the processed surface G1 formed by finishing the side portion of the protruding portion 511X by gouging. Gouging is done by scraping off unnecessary parts little by little, so it is also called “hatsuri”.

  After the first finishing step, as the second finishing step in FIG. 5, the processed surface G1 of each protrusion 511X is further finished as shown in FIGS. 6 (d) and 7 (d) (step in FIG. 5). S4). As this finishing method, for example, a grinder can be used. In the second finishing step, by further proceeding with the finishing process of the first finishing step, the width of each protrusion 511X along the first direction from each side M1 of the main body 510 toward the protrusion of each protrusion 511X. Is gradually reduced. As a result, the projecting direction end of each finished projecting portion 511 </ b> X is the tip P <b> 1, and a skirt portion 511 that forms an R shape with respect to the main body portion 510 is formed. Grinding is done by scraping off unnecessary parts little by little, so it ’s also called “hanging” like finishing by gouging.

  Note that, by performing the first finishing step and the second finishing step, each protrusion 511X is cut so that the length in the longitudinal direction is slightly shortened, and the tip P1 of the skirt 511 is formed.

  Next, the same steps as the respective steps S1 to S4 are similarly performed on the remaining protrusions 511X of the long member 5X, and the hem portions 511 connected to the side portions 40 of the other transverse beam pipe 4 by welding are connected. Form. As a result, the connecting beam 5 can be formed using the long member 5X, and at the same time, the connecting beam 5 can be connected to the transverse beam pipe 4 by welding.

  As described above, according to the welding method of the present embodiment, in step S3 and step S4, the additional bead 57 (FIG. 8 (c) is obtained by gradually decreasing each width of the protruding portion 511X, for example, as the distance from the main body 510 increases. )) Can be efficiently formed at the position in the vicinity of the protruding end C1 of the protruding portion 511X and having the tip P1 continuous with the main body 510. Therefore, as shown in FIG. 8C and FIG. 8D, the welding process for forming the hem 59 by forming the additional bead 57 at the end of the skirt base 511Y is unnecessary. Can be achieved.

  Further, in the long member 5X, each protruding portion 511X protrudes from one end in the first direction of the main body portion 510 from both sides in the second direction of the main body portion 510. Therefore, in step S2, the edge L1 along the protruding direction of the protruding portion 511X. And the side part 40 can be welded linearly. Therefore, it is possible to carry out the welding of the cross beam pipe 4 and the connecting beam 5 relatively easily and quickly, and in some cases, the execution of step S2 can be automated using robot welding or the like.

  Further, as shown in FIGS. 8C and 8D, conventionally, an additional bead 57 formed at the projecting direction end of the skirt base 511Y is processed to form a skirt tip 58, and the skirt base 511Y is formed. Since the hem 59 is constituted by the hem tip 58 and the hem base 511Y and the hem tip 58, the material and structure may be non-uniform, but in the present embodiment, the long member 5X is integrated. Since the skirt 511 is formed, the material and structure thereof can be made relatively uniform. Thereby, the intensity | strength of the skirt part 511 can be equalized.

  Next, a long member 5X different from the above is prepared, and the other steps connected to each side portion 40 of the pair of transverse beam pipes 4 by welding are performed by performing the same steps as steps S1 to S4. A connecting beam 5 is formed.

  Furthermore, each gear box suspension receiver 6 and each main motor receiver 7 connected to each side portion 40 of the pair of cross beam pipes 4 by welding are formed by performing the same steps as steps S1 to S4.

  Specifically, it has a main body portion extending in the first direction, and each protrusion portion (similar to the protrusion portion 511X) protruding from both ends of the main body portion along the second direction from one end side in the first direction. An unillustrated long member (a gear box suspension receiver and a main motor receiver before processing) is prepared. A pair of transverse beam pipes 4 is arranged so that each longitudinal direction is along the second direction. Ends L2 and L3 (see FIG. 2) on one end side in the first direction of the gear box suspension receiver and the main motor receiver before processing are in contact with the side portions 40 of the pair of transverse beam pipes 4 in the second direction. Deploy. The end sides L2 and L3 are linearly welded to the side portions 40, and a bead (see the bead 55 shown in FIGS. 6B and 7B) between the end sides L2 and L3 and the side portions 40. ). A first finishing step and a second finishing step are performed on the protrusions of the gear box suspension receiver and the main motor receiver before processing. As a result, the projecting direction end of each projecting portion after finishing is the tip, and the skirt portion 60 is formed in an R shape with respect to the main body portion of the gear box suspension receiver 6, and the main body portion of the main motor receiver 7 similarly to these Are formed in a continuous skirt 70 (see FIG. 2). Thus, the gear box suspension receiver 6 and the main motor receiver 7 connected to the transverse beam pipes 4 by welding are formed.

  Then, the bogie frame 1 is completed by connecting the vicinity of the longitudinal direction both ends of each horizontal beam pipe 4 with each side beam 3 by welding.

  The present invention is not limited to the above-described embodiment, and the configuration can be changed, added, or deleted without departing from the spirit of the present invention. The above embodiments may be arbitrarily combined with each other. For example, some configurations or methods in one embodiment may be applied to other embodiments.

  In the above embodiment, the number of the horizontal beam pipes 4 and the connecting beams 5 arranged in the carriage frame 1 is two, but the number of the horizontal beam pipes 4 and the connecting beams 5 is other than this (for example, one each or three each). Or more).

  Although the number of side plates 53 used in the connecting beam 5 is two, the connecting beam 5 may be configured using one or three or more side plates 53.

  Each step S1 to S4 shown in FIG. 5 is performed by welding each of the cross beam pipes 4 and the pair of connecting beams 5, each of the cross beam pipes 4, the gear box suspension receiver 6 and the main motor receiver 7. You may implement in the welding part selected from among the welding parts. Moreover, when connecting other elongate members (for example, brake receiver etc.) with respect to the cross beam pipe 4 by welding, you may implement each step S1-S4.

  As described above, the method for manufacturing a railcar bogie frame according to the present invention has an excellent effect of being able to efficiently form a skirt at a welded portion between a long member and a metal pipe. Therefore, it is beneficial to apply widely as a method for manufacturing a bogie frame for a railway vehicle that can demonstrate the significance of this effect.

L1 to L3 End side 1 Bogie frame for railcar 4 Cross beam pipe 5 Connecting beam 5X Long member 6 Gear box suspension receiver 7 Main motor receiver 51, 51X Upper plate 52, 52X Lower plate 53 Side plate 511 Bottom portion 510 Main portion 511X Projection Part

Claims (2)

A long body having a main body extending in a first direction and a pair of protrusions protruding from both sides of the main body along a second direction orthogonal to the first direction from one end of the main body in the first direction. Using a member, and arranging the end sides of the protruding portions on the one end side of the long member along the longitudinal side portions of the long metal pipe extending in the second direction;
A welding step for connecting the one end of the elongated member including the end side and the side portion of the metal pipe by welding;
A finishing step of finishing both side portions of the main body portion along the first direction and side portions of the adjacent projecting portions;
In the finishing step, the width in the first direction of each protrusion is gradually reduced from the both side portions of the main body toward the protrusion direction of the protrusions, thereby being continuous with the body portion and after finishing. The manufacturing method of the bogie frame for rail vehicles which forms the bottom part which makes the front-end | tip the protrusion direction of each said protrusion part. The finishing step includes
A first step of finishing a part of each protrusion by gouging;
The method for manufacturing a bogie frame for a railway vehicle according to claim 1, further comprising a second step of finishing a part of each of the protrusions with a grinder after the first step.

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