JPH0680080A - Manufacture of side beam bogie frame for superconductive magnetic levitation - Google Patents

Abstract

PURPOSE:To improve strength of a side beam, lighten its weight, and improve assemblage by setting a box girder which is formed by assembling aluminium alloy honeycomb panels into a box shape in section to a side beam via corner hardwares and backing metals, and by welding the backing metals beforehand in such a way as to line up their ends with one ends of the honeycomb panels. CONSTITUTION:Backing metals 2 whose ends are lined up with one ends in the longitudinal direction of honeycomb panels 1a, 1b which are cut long are welded, an end of a honeycomb panel 2b to which a backing metal is not welded yet is allowed to abut against one outside end face 2a of time backing metal 2 of the honeycomb panel 1a, the honeycomb panels 1a, 1b are joined together at right angles, and the corner parts A formed by the end parts of the honeycomb panels 1a, 1b are contacted by welding. Then the honeycomb panels 1a, 1b are joined similarly and the four comers are welded so as to the joined into a box girder with box shape section. Corner hardwares 3 having notches 3b at their openings and collars 3a are inserted so that the corner parts C consisting of the collars 3a and the face plates are welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a bogie frame for a railroad vehicle, and more particularly to a method for manufacturing a side beam of a bobbin frame for magnetic levitation which is constructed by assembling aluminum alloy honeycomb panels to reduce the weight.

[0002]

2. Description of the Related Art A bogie frame for a railroad vehicle is shown in FIG. 4 as a hollow square tube made of cast steel or a box girder of a square tube in which two materials obtained by press-forming a steel plate into a U shape are welded into a box shape. It is assembled and configured like an Izutsu.

Recently, however, a magnetic levitation railway has been put into practical use, and a bogie frame used for the magnetic levitation railway is being made of an aluminum alloy in order to reduce its weight.

As shown in FIG. 5, a trolley used for a magnetic levitation railway has an upper trolley frame (device frame B) as a device frame for supporting on-vehicle devices and a lower part for supporting a superconducting magnet (hereinafter referred to as SCM). It is composed of a bogie frame (support frame A), and these bogie frames are about to be made of an aluminum alloy material in order to reduce the weight.

[0005]

That is, even if the bogie frame used in the magnetically levitated linear motor car, which is currently being put into practical use, is made of an aluminum alloy, it still has a weight problem and is further lightweight. Consideration is being made.

Therefore, a honeycomb structure used in aircraft, that is, a honeycomb material made of an aluminum alloy has been nominated as a candidate. However, the conventional honeycomb made of an aluminum alloy is a bonded honeycomb in which materials and corrugated plate materials are bonded with an adhesive. However, even when it is formed into a panel, it cannot be welded and joined, and it cannot be used for a member requiring strength.

[0007] Therefore, the present invention has been made in view of such drawbacks of the prior art, and by using a brazed honeycomb panel made of an aluminum alloy, the welding workability is enhanced and a lightweight bogie frame is used. It is intended to provide a manufacturing method.

[0008]

Means for Solving the Problems As a result of extensive studies to achieve the above object, a brazing honeycomb core made of an aluminum alloy and a honeycomb panel brazed to an aluminum alloy face plate (hereinafter referred to as a honeycomb panel or simply a panel) are By welding with an aluminum alloy backing metal (hereinafter simply referred to as backing metal) and an aluminum alloy coupling metal fitting (hereinafter simply referred to as coupling metal fitting or corner metal fitting), the welding can be facilitated and the weight can be reduced. Moreover, they have found that the honeycomb panel can be used as a strength member, and completed the present invention.

That is, the gist of the present invention is to weld a strip-shaped backing metal with one end in the longitudinal direction of four honeycomb panels aligned with each other, and to weld the one end outside the backing. Arranged so as to contact the edge of the honeycomb panel on the side without the metal, after welding the face plate of the honeycomb panel, insert the corner metal fittings into the four corner openings formed by the end surfaces of the honeycomb panel. Welded with the face plate of the honeycomb panel,
A method of manufacturing a side beam having a box-shaped cross section is defined as a first invention, and when a backing metal is attached to an edge of the honeycomb panel, a double width is provided at a center of the honeycomb panel having at least a double width. A second invention is a method of attaching a backing metal to an edge of a honeycomb panel by welding a backing metal material having the above and then cutting the center of the backing metal material.

[0010]

The side beams of the bogie frame for a magnetically levitated vehicle constructed as described above are composed of box girders in which honeycomb panels are combined in a box shape through corner fittings and backing metal. The honeycomb panels 1a and 1b can be joined to each other through the corner metal fittings and the backing metal, which facilitates the welding work. In addition, the honeycomb panel and the corner fitting are integrated by welding, and a side beam having high strength and rigidity and a reduced weight can be obtained. In addition, the backing metal is frame-welded to the honeycomb panel and cut at the center, improving welding performance.
And the welding work becomes easy.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A manufacturing method of an embodiment will be described with reference to the drawings, and an operation and effect of the present invention will be described.

FIG. 1 is a sectional view showing a procedure for manufacturing a side beam of a bogie frame for a magnetically levitated vehicle according to the present invention.

First, a method of manufacturing the honeycomb panel 100 will be described.

A brazing sheet 101 having an aluminum alloy as a core material and a brazing material as a skin material is bent and formed into a trapezoidal corrugated shape as shown in FIG. 3a, and these are combined, and flat portions are brought into close contact with each other to form a honeycomb honeycomb. The core 110 is manufactured (FIG. 3b). The honeycomb panel 100 is manufactured by sandwiching the upper and lower surfaces of the honeycomb core 110 between two face plates 120 made of an aluminum alloy brazing sheet (FIG. 3c) and joining them by brazing. Example 1 A box formed by cutting long honeycomb panels 1a and 1b from the honeycomb panel manufactured as described above and using the honeycomb panels 1a and 1b, the corner metal fittings 3 and the backing metal 2 to assemble them into a box-shaped cross section. Create a digit.

That is, as shown in FIG. 1, (1) the backing plate 2 is welded with its end edges aligned with one end in the longitudinal direction of the honeycomb panels 1a, 1b cut into long pieces.

(2) The outer edge of the backing plate 2 of the honeycomb panel 1a is in contact with the outer edge of the backing plate 2a of the honeycomb panel 2b, and the edge of the backing plate of the honeycomb panel 2b where the backing plate is not welded is attached to the honeycomb panels 1a and 1b at right angles. The fillet portions A formed by the end portions of the honeycomb panels 1a and 1b are welded and joined.

(3) Next, the honeycomb panels 1a and 1b are assembled according to the above procedure, the four corners are welded, and the honeycomb panels are assembled to a box girder having a box-shaped cross section.

(4) The honeycomb panel 1 is provided in the opening B formed by the end faces of the honeycomb panel assembled in the above box shape.
a, 1b so as to abut on the end portion of the face plate on the outer peripheral side, and the corresponding contact surface is formed at a right angle with the fillet portion A as an intersection, and the outer peripheral portion of the face plate on the outer peripheral side of the honeycomb panels 1a, 1b abuts. 3 which has a notch 3b and is welded to the outer peripheral portion of the face plate.
The corner metal fitting 3 having a is inserted, and the fillet portion C formed by the flange 3a and the face plate is welded.

With the above structure, the welding work between the honeycomb panels is facilitated, the strength and rigidity of the structure are high, and the bogie frame side beam, which is lighter than the case where only the aluminum alloy plate material is used, is provided. can get.

That is, when the strength and rigidity of the structure are made equal (that is, the deflection of the central load point is made equal when the three-point bending test is performed), the weight of the aluminum alloy plate material alone is used. That is, the structural trolley frame using the honeycomb panel of the present invention has a weight of 50 kg, which is approximately 30 kg (40%). Example 2 In Example 1, a method of attaching a backing metal to the edge of the honeycomb panel will be described with reference to FIG. For example, for the face plates of 1a and 1b, a honeycomb panel having a width that can be sampled by the honeycomb panels 1a and 1b shown in Example 1 is used.
After placing the four corners of the double-width backing metal material 2 ′ and welding the frame, the central portion of the backing metal material 2 ′ is cut to apply backing to the edges of the honeycomb panels 1 a and 1 b. Manufacture honeycomb panels 1a and 1b in which gold 2 is attached and a backing metal is attached to the edge of the honeycomb panel.

According to the backing metal mounting method of the present invention,
Since the welded portion is omitted at one place and the cut portion has no welded portion, the accuracy is improved when the honeycomb panels 1a and 1b are assembled in a box shape, and the weld metal enters the non-welded portion. The performance of the welded portion of the fillet A can be improved.

[0022]

According to the present invention, the following effects can be obtained.

Since the side beams used for the SCM support frame are welded through the corner fittings and the backing metal at the four corners of the honeycomb panel in which the aluminum honeycomb core and the face plate are completely integrated by brazing, It has high strength as a beam, excellent weather resistance and durability, and can be lightened. Further, by frame-welding the backing metal to the honeycomb panel and cutting it at the center, it is possible to improve the welding performance and reduce the welding man-hours.

[Brief description of drawings]

FIG. 1 is a sectional view showing a procedure for assembling a side beam of a bogie frame for a magnetically levitated vehicle according to the present invention.

[Fig. 2] Fig. 2 is a view showing a method of attaching a backing metal to an edge of a honeycomb panel.

FIG. 3a is a diagram showing a first step of a method for manufacturing an aluminum alloy honeycomb panel.

FIG. 3b is a diagram showing a second step.

FIG. 3c is a diagram showing a third step.

FIG. 4 is a diagram showing an outline of a conventional bogie frame.

FIG. 5 is a diagram showing an outline of a magnetic levitation vehicle.

[Explanation of symbols]

 1 Side beam 1a, 1b Panel 2 Back metal 3 Corner fitting

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 15, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Fig. 2]

[Figure 4]

[Figure 1]

[Figure 3]

[Figure 5]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Oda 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Masayoshi Azaue 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Kenichi Kato 2-8 Mitsumachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute

Claims (2)

[Claims] 1. A method of forming a side beam of a bogie frame for superconducting magnetic levitation into a box girder assembled in a box-shaped cross section with an aluminum alloy honeycomb panel, in which four edges are aligned with one edge in the length direction. A belt-shaped aluminum alloy backing metal is welded, and one side of the backing metal and the edge of the honeycomb panel on the side without the backing metal are arranged so as to contact one end surface of the backing metal, and the honeycomb panel After welding the face plate of, the aluminum alloy corner metal fittings are inserted into the openings of the four corners formed by the end faces of the honeycomb panel, and the corner metal fitting and the face plate of the honeycomb panel are welded to form a box-shaped cross section. A method for manufacturing a side beam of a bogie frame for superconducting magnetic levitation. 2. A method of attaching a backing metal to an edge of the honeycomb panel, wherein a backing metal material having a double width is welded to the center of a honeycomb panel having at least a double width, and the backing metal is then welded. A method of attaching a backing metal to the edge of a honeycomb panel by cutting the center of the material.