JP2002187549A - Light additional object welding/mounting structure in rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light additional object welding/mounting structure in a rolling stock capable of securing welding strength and allowing accurate welding. SOLUTION: Pipe receiving parts 5 are welded so that welding lines for a bogie frame 1 become substantially parallel with the main stress direction by a vertical load of the rolling stock. When the pipe receiving parts 5 are welded on side beams 2 and 3 of the bogie frame 1, the welding is performed so that the welding lines become substantially parallel with the longitudinal direction of the car body. When the pipe receiving parts 5 are welded on a lateral beam 4, the welding is performed so that the welding lines become substantially with the lateral direction of the car body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight attachment welding structure for a railway vehicle.

[0002]

2. Description of the Related Art Generally, pneumatic control and electric control are used for running in railway vehicles. And
Piping of air pipes for supplying pressurized air for such air control and wiring of electric wires for supplying electric power for electric control are performed on a structure of a railway vehicle, for example, a bogie frame. Such pipes and wires are generally supported by a bogie frame of a vehicle via a fixture with respect to a pipe receiver or a wire receiver fixed to the bogie frame by welding.

[0003] The shape of a pipe receiver or a wire receiver fixed to a bogie frame of a railway vehicle has various shapes such as a flat plate shape, an L-shape, and a U-shape. For example, as shown in FIG. 5, a box-shaped pipe receiver 101 is used, and the pipe receiver 101 is welded all around the circumference of the contact surface of the bogie frame with the side beam 102 (or the horizontal beam) (the welded portion is indicated by W1). To do. Further, in the case of the pipe receiver 103 having an L-shaped cross section, welding is performed on the contact surface of the bogie frame with the side beam 102 (or the side beam) (the welded portion is indicated by W2).

[0004] There is no particular rule for the method of welding such lightweight accessories as a pipe receiver and a wire receiver to the bogie frame, and the direction of the welding line is not considered. It is the current situation that welding is performed in a direction that is easy to weld.

That is, with respect to mounting brackets such as dampers, motors, brakes, etc., which are weight-added products, since a large load acts on the bogie frame through the mounting brackets, strength analysis is performed using a computer or the like, and the analysis results are obtained. Welding is performed based on the On the other hand, lightweight additional items such as the above-mentioned
Since it is not generally considered that a large load acts on them, after the welding work of the mounting bracket to the bogie frame described above is completed, the bogie frame once heated in an annealing furnace to remove residual stress In addition, such piping receivers and wiring receivers are properly mounted while performing piping work and wiring work, and are not mounted by welding with added strength as in the above-described mounting bracket (weight-added product). .

[0006]

However, when welding is performed in a direction in which an operator can easily perform welding without setting a special rule for the welding method, a light weight that does not have a possibility of applying a large load is used. It is not preferable that no consideration is given to the required welding strength just because it is an additional product. It is inferior in operability to perform the mounting of the device properly.

The inventor of the present invention has found that the load applied to the bogie of a railway vehicle acts in various directions such as up and down, front and rear, and left and right. In many cases, the load acting in the up and down direction is the largest, and the direction of the main stress is also large. It was found that it was governed by the upper and lower load components, and it was conceived that if the welding direction was matched with the direction of the main stress for the lightweight additive, it would be advantageous for the evaluation of the strength of welding, leading to the present invention. It is something.

[0008] In a vehicle for overseas use, the allowable stress of the welding attachment portion is determined in each country. For example, in the United States welding standard (AWS), welding where the welding line is parallel to the direction of principal stress is classified as category B, and 11.
When a permissible stress of 25 kgf / mm ² is given and the welding line is perpendicular to the direction of the main stress, category C (permissible stress:
6.33 kgf / mm ² ), category F (allowable stress:
4.92 kgf / mm ² ), which is disadvantageous as compared to the case where the welding line is parallel to the direction of the main stress.
Similarly, in the case of the United Kingdom, welding in which the welding line is parallel to the main stress direction is classified as class D, and an allowable stress of 52 N / mm ² is given. Stress: 52 N / mm ² ) and class F2 (allowable stress: 52 N / mm ² ), which is still disadvantageous as compared to the case where the welding line is parallel to the direction of the main stress.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lightweight additional-weld mounting structure for a railway vehicle capable of performing welding with good workability while securing welding strength.

[0010]

According to a first aspect of the present invention, there is provided a lightweight additional product welding and mounting structure for a railway vehicle, wherein the lightweight additional product is mounted and fixed to a structure of the railway vehicle by welding. The lightweight additive is welded such that a welding line to the structure is substantially parallel to a direction of a main stress due to a load in a vehicle vertical direction.

According to the lightweight attachment welding structure of the first aspect, all the lightweight attachments are welded so that the welding line is substantially parallel to the direction of the main stress, and the welding operation is required. Workability is ensured by ensuring welding strength.
In addition, in the evaluation of the welding strength, the allowable stress is increased, so that an advantageous judgment is made on the welding of the lightweight additional product as compared with the case where the welding line is directed in another direction.

Specifically, in the case where the structure is a side beam of a bogie frame extending in the front-rear direction of the vehicle body, the lightweight additional member may include a welding line to the side beam. May be substantially parallel to the front-rear direction (direction parallel to the rail) of the vehicle body, and the structure may be such that the frame extends in the left-right direction of the vehicle body. In the case of a side beam, the lightweight additional object may be configured so that a welding line to the side beam is substantially parallel to a left-right direction of the vehicle body (a direction parallel to the sleeper). In this manner, necessary welding strength can be ensured for welding of the lightweight appendage to the side beam or the side beam of the bogie frame constituting the vehicle structure, and an advantageous judgment can be made in the evaluation of welding. Will be.

[0013] By the way, in a railway car, pneumatic control and electric control are performed to drive the train, so that a large number of air tube pipe receivers and electric wire receivers are provided as lightweight addenda. There are a lot of welds on those bogie frames.

According to a fourth aspect of the present invention, a pipe receiver for supporting an air pipe for air control on the bogie frame is used as the lightweight accessory. As the lightweight additive, a wire receiver for supporting an electric wire for electric control on the bogie frame can be adopted, and in such a case, welding for the pipe receiver or the wire receiver, which is the lightweight additive, can be performed. The required welding strength can be ensured, and the work can be performed with good workability.

[0015]

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

FIG. 1 is an explanatory view showing a welding attachment structure of a pipe receiver (light weight addition) in a railway vehicle according to the present invention, and FIG.
FIG. 4 is an explanatory view showing a state where a pipe receiver is welded to a side beam of a bogie frame as an example.

As shown in FIG. 1, a bogie frame 1 has left and right beams 2 and 3 extending in the front-rear direction of the vehicle body on both left and right sides, and lateral beams connecting the left and right beams 2 and 3 in the vehicle left-right direction. And a beam 4. On the side beams 2, 3 and the side beams 4 of the bogie frame 1, a large number of pipe receivers 5 (lightweight additions) for supporting an air pipe (not shown) for air control on the bogie frame 1 are welded. It is attached and fixed. This pipe receiver 5
, An air pipe (not shown) is attached via a fixture (not shown).

The pipe receiver 5 is welded so that the welding line to the bogie frame 1 is substantially parallel to the direction of the main stress due to the load in the vertical direction of the vehicle. Specifically, when welding the pipe receiver 5 to the side beams 2 and 3 of the bogie frame 1,
As for the side beams 2 and 3, the direction of the main stress is in the front-back direction of the vehicle body (direction parallel to the rail), so that welding is performed such that the welding line W11 is substantially parallel to the front-back direction of the vehicle body.

That is, as shown in FIG.
The main body plate portion 5A is separated from both side edges of the rectangular main body plate portion 5A.
The side plate portion 5B of the pipe receiver 5 is disposed so as to be substantially parallel to the side beam 2 in the longitudinal direction (the front-rear direction of the vehicle body) with respect to the side beam 2. The lower edge of the portion 5B is welded to the side beam 2.
Therefore, the welding line W11 for the side beam 2 of the pipe receiver 5
Are substantially parallel to the front-back direction of the vehicle body, that is, the direction of the main stress. The body plate 5A of the pipe receiver 5 is provided with two screw holes 5a for attaching a fitting for attaching an air pipe using screws. Even when the pipe receiver 5 has not only the side plate portions 5B extending from both side edges of the main body plate portion 5A but also the front and rear plate portions extending from the front and rear edges, the lower end edges of the front and rear plate portions are connected to the side beams 2. There is no need to weld. This is because the required welding strength is secured.

Further, as for the horizontal beam 4 of the bogie frame 1, the direction of the main stress due to the load in the vertical direction of the vehicle is in the left-right direction of the vehicle body (the direction parallel to the sleepers).
The welding is performed such that the welding line to the lateral beam 4 is substantially parallel to the left-right direction of the vehicle body.

In this way, all the pipe receivers 5
Since the welding line W11 to the bogie frame 1 is welded so as to be substantially parallel to the direction of the main stress, the direction of attachment (welding) of the pipe receiver 5 is changed to the beams 2, 3, and 4 respectively.
In the same direction, and the welding operation can be performed with good workability. In particular, the direction of the main stress (the longitudinal direction of the vehicle body for the side beams 2 and 3 of the bogie frame 1 and the lateral direction of the vehicle body for the side beam 4) is indicated on the bogie frame 1 by, for example, an arrow (mark) indicating the direction. By attaching and indicating, the worker can refer to the arrow and direct the pipe receiver 5 in the direction of the arrow as long as the worker knows the mounting location of the pipe receiver 5. Become. In this way, if the direction of the main stress (the direction of welding) can be easily understood by the operator, the welding operation is simplified and the workability is further improved.

Further, in this case, in the evaluation of the welding, the allowable stress is increased, so that it is possible to obtain an advantageous judgment on the welding of the pipe receiver 5 as compared with the case where the welding line is directed in another direction. Become like

Further, in the bogie frame 1, since the welding lines of the pipe receivers 5 are all in a direction substantially parallel to the direction of the main stress, even in the case of an overseas railway vehicle such as the United States or United Kingdom, The strength can be evaluated without lowering the class of the welding joint, and workability can be improved.

Further, the beam portion of the bogie frame to which such a pipe receiver is welded does not necessarily have to be a flat surface, and the same can be applied to a case where it is a curved surface.

That is, when the beam has a circular cross section, for example, as shown in FIGS. 3 and 4, one side edge of the main body plate portion 5A extends in a direction orthogonal to the main body plate portion 5A.
The side plate portion 5B is disposed so as to face the front-rear direction of the vehicle using a pipe receiver 5 'having an L-shaped cross section extending B, and in this state, the lower edge of the side plate portion 5B is connected to the side beam 2' (or What is necessary is just to weld to the curved outer surface of a side beam. By doing so, the welding line W21 becomes substantially parallel to the direction of the main stress due to the vertical load of the vehicle. Also in this case, the main body plate portion 5A is provided with two screw holes 5a for screwing a fixture for attaching the pipe.

The above embodiment is an example in which the present invention is applied to a pipe receiver for supporting an air pipe for air control on a bogie frame. However, the present invention is not limited to this. The present invention can be similarly applied to a wire receiver for supporting the vehicle frame on a bogie frame.

The lightweight additive is not limited to a pipe receiver or a wire receiver, but any other lightweight additive that does not calculate the strength can be applied in the same manner. What is performed is not limited to the bogie frame of the vehicle structure, but other structures of the vehicle (for example, the side structure,
The same can be applied to the case of welding to the wife structure).

[0028]

The present invention is embodied as described above, and has the following effects.

[0029] In the lightweight attachment welding structure for a railway vehicle according to the present invention, all the lightweight attachments are welded to the structure such that the welding line is substantially parallel to the direction of the main stress. Workability can be improved. In addition, in the evaluation of welding, the allowable stress is increased, so that an advantageous judgment is made on the welding of the lightweight additive as compared with the case where the welding line is directed in another direction.

In the case where the lightweight additional member is to be welded to the side beam of the bogie frame constituting the structure, the welding line is substantially parallel to the front-rear direction of the vehicle body. In addition, when the lightweight addition is welded to the side beam, the lightweight addition is performed by performing the welding so that the welding line is substantially parallel to the left-right direction of the vehicle body as described in claim 3. Can be realized so that the welding lines are almost parallel to the direction of the principal stress.

Further, as described in claim 4, the lightweight additional member may be a pipe receiver for supporting an air pipe for air control on the bogie frame.
If the lightweight additive is a wire receiver for supporting an electric wire for electric control on the bogie frame, the pipe receiver and the wire receiver can be welded with good workability. In particular, in railway vehicles, pneumatic control and electric control are performed to drive it, many pipe receivers for air pipes and wire receivers for electric wires are provided, and there are many welding points of them, This is advantageous in improving workability.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a welding attachment structure of a pipe receiver (light weight addition) in a railway vehicle according to the present invention.

FIG. 2 is an explanatory view showing a state in which a pipe receiver (light weight addition) is welded to a side beam of a bogie frame as an example.

FIG. 3 is a view similar to FIG. 2 for another embodiment.

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is a view similar to FIG. 1 for a conventional example.

[Explanation of symbols]

 Reference Signs List 1 bogie frame 2 side beam 2A side beam 3 side beam 4 side beam 5 pipe receiver 5A pipe receiver 5a screw hole 5b body plate 5c side plate W11 welding line W21 welding line

Claims (5)

[Claims] 1. A lightweight additive welded mounting structure for a railway vehicle, wherein a lightweight additive is attached to a structure of a railway vehicle by welding, wherein the lightweight additive has a welding line to the structure mainly due to a load in a vehicle vertical direction. A lightweight additive welded mounting structure for a railway vehicle, which is welded so as to be substantially parallel to the direction of stress. 2. The lightweight structure according to claim 1, wherein the structure is a side beam of a bogie frame extending in a front-rear direction of the vehicle body, and a welding line for the side beam is substantially parallel to a front-rear direction of the vehicle body. A lightweight additional product welding mounting structure for a railway vehicle as described in the above. 3. The lightweight structure according to claim 1, wherein the structural body is a lateral beam of a bogie frame extending in a lateral direction of the vehicle body, and the welding line for the lateral beam is substantially parallel to a lateral direction of the vehicle body. Or a lightweight additional product welding mounting structure for a railway vehicle according to 2. 4. The lightweight additional article welding structure for a railway vehicle according to claim 1, wherein the lightweight additional article is a pipe support for supporting an air pipe for air control. 5. The lightweight attachment welding structure for a railway vehicle according to claim 1, wherein the lightweight attachment is a wire receiver for supporting an electric wire for electric control.