JP2009132210A - Railroad vehicle body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make even a bent part extending lengthwise and crosswise by laser welding or traces of spot welding inconspicuous without post-finish after welding. <P>SOLUTION: At least one of linear rough surface patterns P1 to P3, a minute uneven design pattern, a minute uneven design pattern having a linear/non-linear rough surface, regular or irregular uneven design pattern, or an uneven design pattern having a regular or irregular linear/non-linear rough surface by embossing or etching shown in figures is formed on an outer surface of at least an outer plate 2 of a side body structure 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a railway vehicle structure having a single skin type outer plate and having a welded joint with an inner arrangement member on the outer plate.

  A steel plate, a stainless steel plate, and an aluminum plate are usually used for the outer plate. Particularly, the steel plate and the stainless steel plate have a welded joint portion with an aggregate as an inner arrangement member. Spot welding or laser welding is employed as the welding method (see, for example, Patent Documents 1 and 2).

In Patent Document 1, in the case of spot welding, discoloration due to indentation due to electrode pressing or high-temperature oxidation due to passing a large current occurs, and those lasers are welded by linear laser lap welding that does not reach the outer surface of the outer plate from the inside. A technique for avoiding the problem is disclosed, and a technique for correcting the distortion of the outer plate and the like and improving the adhesion of the laser overlap weld during laser welding is proposed.
Japanese Patent Laid-Open No. 8-25068 Japanese Patent Laid-Open No. 9-30414

  By the way, in the laser welding described in Patent Document 1, when the thickness of the outer plate of the stainless steel plate is less than 2 mm, for example, laser welding joining between the outer plate a and the inner arrangement material b such as an aggregate as shown in FIG. In the portion along the line of the part c, the deformation shown in the figure called a corner fold, for example, called a corner fold, in which the vicinity of both sides is bent inward with an out-of-plane deformation inside the periphery of the weld line, The amount of deformation increases as the plate thickness decreases. This is due to the condensation when the melted part of the outer plate is solidified by laser welding from the inside. The larger the bend, the more the outer surface is the mirror surface, Experienced to stand out by regular reflection. This is especially true for the outer plate of a stainless steel plate that is not painted and remains a mirror surface.

  On the other hand, in the outer plate with belt grinding finish and hairline finish that are often seen in actual vehicles that have been running in the past, the bent parts by laser welding performed linearly along the direction of the polished eyes are not noticeable and are orthogonal The present inventor has experienced and is known to have a conspicuous bent portion by laser welding performed in the direction. This can be said to be a visual blurring effect or burial effect by irregular reflection in a direction perpendicular to the polishing eye.

  However, since the inner arrangement material b laser welded to the outer plate a is arranged vertically and horizontally in the vertical direction and longitudinal direction of the vehicle, it becomes noticeable when laser welding is performed in the longitudinal direction of the vertical aggregate b. Depending on the belt grinding and hairline finishes that can only be finished in one direction, both vertical and horizontal bends that occur along the vertical and horizontal laser welding lines cannot be accommodated. Further, it is not effective for spot welding marks, and the only way to make it inconspicuous is by surface processing after welding.

  The object of the present invention includes a visual blur effect, a buried effect, an assimilation effect that increases the degree of assimilation with the surroundings, and a combination thereof, and a bending portion that runs vertically and horizontally by laser welding without post-finishing after welding. Another object of the present invention is to provide a railway vehicle structure that can hardly stand out even if it is a spot welding mark.

  In order to achieve the above-described object, the railway vehicle structure of the present invention is a railway vehicle structure having a welded joint with an inner arrangement material or a laminated material on the outer plate, at least the outer plate of the side structure is On the outer surface, a rough rough line pattern oriented in the longitudinal direction and / or up and down direction of the vehicle by embossing or etching process, fine width shape and dense arrangement with the longitudinal direction and / or up and down direction of the vehicle Fine concavo-convex pattern / pattern, fine width shape and dense arrangement with the longitudinal direction and / or vertical direction of the vehicle, at least one of the concave portion and the convex portion is linear or oriented in the longitudinal direction or the vertical direction of the vehicle or Fine irregular patterns / patterns with a non-linear rough surface pattern, regular, irregular irregular patterns / patterns, regular, irregular, longitudinal or up / down direction of the vehicle Is set to one, characterized in that the linear or uneven pattern pattern having a non-linear rough surface facing the, at least one of which is formed.

  In such a configuration, since the pattern formed on the outer surface of the outer plate is by embossing or etching, any pattern can be formed, and a different pattern can be formed for each section. Corresponding to the difference in welding direction and the mixture of laser and spot welding areas, the welding traces such as bends and spot traces are enhanced by visual blurring effect, burial effect, as well as the degree of assimilation with the surroundings Assimilation effects and combinations thereof are obtained.

  In particular, in the case of a linear rough surface pattern oriented in the longitudinal direction or the vertical direction of the vehicle, incident light is randomly scattered in a direction perpendicular to the direction of the linear rough surface pattern. The linear rough surface pattern in the longitudinal direction of the vehicle has a bending direction with respect to the bent portion by laser welding that is frequently used in the longitudinal direction of the vehicle, and has almost the same appearance as the background portion without regular reflection from the bent surface. A visual blurring effect or buried effect can be obtained. Moreover, in the linear rough surface pattern in the vertical direction of the vehicle, it becomes the bending direction with respect to the bent portion by the vertical laser welding along the inner arrangement material arranged in the vertical direction of the vehicle such as a pillar material, A visual blurring effect or an embedding effect is obtained that has almost the same appearance as the background without regular reflection from the bent surface. The linear rough surface patterns in both directions can be individually applied to different welding areas, and the difference can be set as a pattern for the entire vehicle. It is also possible to create a pattern that is a combination of facing linear rough surface patterns. This makes it possible to use a bent portion by laser welding frequently used in the longitudinal direction of the vehicle and a bent portion by laser welding in the vertical direction along the pillar material. In both cases, a visual blurring effect or burial effect is obtained.

  Also, if the vehicle has a fine width shape and densely arranged fine uneven pattern / pattern with longitudinal or vertical directionality, the appearance with direction according to the fineness and denseness matches that. The effect of assimilating the bent part by laser welding in the direction of the laser beam to the surrounding background visually and the incident light including shapes such as the inclination and bending of the uneven surface are distributed and reflected in the bending direction of the bent part by laser welding. The effect of blurring and burying is somewhat obtained. Corresponding to the difference in the direction of laser welding can be performed in the same manner as in the case of a linear rough surface pattern.

  Further, in a narrow width shape and a dense arrangement having the longitudinal direction and / or vertical direction of the vehicle, at least one of the concave portion and the convex portion is linear or non-linear oriented in the longitudinal direction or the vertical direction of the vehicle. The fine concavo-convex pattern / pattern having a rough surface pattern has the same effect as the fine concavo-convex pattern / pattern having the fine width shape and the dense arrangement with the longitudinal direction or the vertical direction of the vehicle described above. Since the incident light has a directivity or non-directional scattering action due to the rough or non-linear rough surface pattern, the effect of blurring or burying the bent portion of the laser welding on the surrounding background can be further enhanced.

  In addition, if the irregular pattern / pattern is regular or irregular, it is easy to assimilate the spot welding traces depending on the size or shape of the irregularities, and a burial effect can be obtained somewhat depending on the similarity of the shapes.

  If the rugged pattern has a linear or non-linear rough surface facing the longitudinal or vertical direction of the vehicle, it will visually divide the continuous bent part by laser welding. In addition, depending on the line rough surface and uneven surface, the effect of blurring or burying of the bent part along the straight line laser welding can be obtained by the fine scattering action of the incident light in the direction orthogonal to the line. Depending on the linear rough surface and the uneven surface, the effect of blurring or burying of the bent portion can be obtained somewhat by the fine scattering without directivity of incident light regardless of the direction of laser welding.

  The railway vehicle structure of the present invention is also a railway vehicle structure in which the outer plate has a welded joint with an inner arrangement member or a laminated material, and the outer plate of the side structure is laser welded toward the longitudinal direction of the rail vehicle. Another feature is that it is curved in the vertical direction with a radius of curvature of 1500 to 10,000 mm within a range that covers at least the arrangement area of the inner arrangement material to be joined.

  In such a configuration, the protruding direction of the bent portion formed by laser welding the outer plate toward the inner arrangement member and the longitudinal direction of the railway vehicle, and the protruding direction of the curve having a curvature radius of 1500 to 10,000 mm of the outer plate. By matching, it is common in terms of the diffuse reflection characteristics of incident light, the bending rate and the protruding rate of the outer surface of the bent portion with respect to the outer surface of the outer plate are reduced as compared with the flat plate, and the curved shape of the outer plate is the laser welded portion. By suppressing the deformation force that bends inward with out-of-plane deformation to the inside of the peripheral part at the boundary, the tension resistance against the inversion from the convex curve direction to the convex inside, Since the bending rate and protrusion rate of the outer surface of the bent portion by laser welding with respect to the outer surface of the outer plate are reduced, the difference in the diffusion characteristics of incident light where the directions of the outer surface of the curved outer plate and the outer surface of the bent portion by laser welding are the same Hold down, iron Blur effect or buried effects on the background of the bent portion by laser welding in the arrangement region of the inner arrangement material laser welding is performed in the longitudinal direction of the vehicle is obtained.

The railway vehicle structure of the present invention is also a railway vehicle structure having a welded joint with an inner arrangement material or a laminated material on the outer plate. At least the outer plate of the side structure is embossed or etched on the outer surface. According to, linear rough surface pattern oriented in the longitudinal direction and / or up and down direction of the vehicle, fine width shape and densely arranged fine uneven pattern / pattern having directionality in the longitudinal direction and / or up and down direction of the vehicle, longitudinal direction of the vehicle It has a fine width shape and a dense arrangement with directionality and / or vertical directionality, and has a linear or non-linear rough surface pattern oriented in the longitudinal direction or vertical direction of the vehicle in at least one of the concave and convex portions Fine irregular patterns / patterns, regular, non-uniform irregular patterns / patterns, regular, irregular, linear or non-linear in the longitudinal or vertical direction of the vehicle One of the concavo-convex patterns / patterns having a surface is formed and is curved in the vertical direction with a radius of curvature of 1500 to 10000 mm within a range that covers at least the arrangement area of the inner arrangement material to be welded. It has other features.
In such a configuration, since the action by the one feature and the action by the other feature are obtained in combination, the blurring effect or the burying effect and the assimilation effect with the background of the welded portion can be enhanced.

  The unevenness degree of the rough surface can correspond to Nos. 60 to 220 in terms of the grain size of the abrasive grains.

  In such a configuration, a roughening effect or a burying effect or an assimilation effect with respect to the background of the welded portion can be sufficiently obtained by a rough surface and irregularities that do not impair the appearance of the outer plate.

  The outer plate can be made of a pattern processing material in which various patterns are formed in advance. In such a configuration, any pattern can be formed on a long outer plate by embossing or etching, and a different pattern can be formed for each section. Corresponding to the mixture of welded areas and spot welded areas, welding marks such as bends and spot marks can be visualized without post-finishing, as well as an assimilation effect that increases the degree of assimilation with the surroundings, as well as visual blurring effect A combination of them is obtained.

  According to one characteristic of the railway vehicle structure of the present invention, the pattern of the outer surface of the outer plate can be formed in any way by embossing or etching, and different patterns are formed for each section, and the difference in the direction of laser welding It is possible to mix laser welding areas and spot welding areas, and various welding marks caused by welding are visually blurred, buried, assimilated, and combined to make them inconspicuous without finishing. it can.

  In particular, depending on the linear rough surface pattern oriented in the longitudinal direction or the vertical direction of the vehicle, the linear rough surface pattern in the longitudinal direction of the vehicle may be used for a bent portion by laser welding that is frequently used in the longitudinal direction of the vehicle. Incident light is scattered in the bending direction, and depending on the linear rough surface pattern in the vertical direction of the vehicle, the bent portion by the vertical laser welding along the inner arrangement material arranged in the vertical direction of the vehicle such as a pillar material On the other hand, incident light is scattered in the bending direction, and in any case, the continuous bending portion by laser welding can be made inconspicuous or inconspicuous, and the linear rough surface pattern in both directions can be differently welded. It can be applied individually to each other, and the difference in the appearance can be set as a pattern on the entire vehicle, and a pattern composed of linear rough surface patterns oriented in the longitudinal direction and vertical direction of the vehicle Te, or inconspicuous bends both by laser welding in the longitudinal direction and the vertical direction of the segment without the vehicle, can be made inconspicuous.

  In addition, in the case of a fine uneven pattern / pattern with a fine width shape and dense arrangement with the vehicle's longitudinal direction and vertical directionality, the direction according to the fineness of the unevenness and the density while obtaining a decorative appearance by the unevenness In addition to the assimilation effect of the bent part by laser welding in the direction that matches the directionality, the blurring effect by dispersing and reflecting incident light in the bending direction of the bent part by laser welding The embedding effect can be obtained to some extent, the bent portion can be made inconspicuous or inconspicuous, and the response to the difference in the direction of laser welding can be made in the same manner as in the case of the linear rough surface pattern.

Further, with a fine width shape and a dense arrangement having a direction in the longitudinal direction and the vertical direction of the vehicle, while obtaining a decorative appearance with directional irregularities, at least one of the concave direction and the convex portion in the longitudinal direction of the vehicle and / or In the fine uneven pattern / pattern having a linear or non-linear rough surface pattern oriented in the vertical direction, the fine irregularities in the above-mentioned fine width shape and densely arranged in the longitudinal direction and the vertical direction of the vehicle. The effect similar to the pattern / pattern is combined with the effect of the incident light directionality due to the linear or non-linear rough surface pattern, or the effect of non-directional scattering, so the laser welding bend is less noticeable. , Can be inconspicuous.
In addition, with regular and atypical concavo-convex patterns and patterns, it is easy to assimilate spot weld marks according to the size and shape of the concavo-convex while obtaining the decorative appearance, and depending on the similarity of the shape, the burial effect can be varied. It can be made inconspicuous or inconspicuous.

  In addition, for irregular shapes / patterns with linear or non-linear rough surfaces oriented in the longitudinal or vertical direction of the vehicle in a regular or non-standard shape, continuous decoration by laser welding is achieved while obtaining a decorative appearance. The visual division of the bent part is combined with a linear rough surface and fine scattering with directivity of the incident light due to the unevenness, making the bent part along the straight line laser welding less noticeable or less noticeable. In combination with fine scattering without directivity of the incident light due to the non-linear rough surface, the bent portion can be made inconspicuous or inconspicuous regardless of the direction of laser welding. This is effective for the difference in the direction of bending and the bent portion by non-linear laser welding.

  According to another feature of the railway vehicle structure of the present invention, the protruding direction of the bent portion by laser welding of the outer plate and the protruding direction of the curved outer plate are the same, and the diffusion of incident light in the bent direction and the bent direction. The reflection characteristics are common, the bending rate and the protrusion rate of the outer surface of the bent portion with respect to the outer surface of the outer plate are reduced compared to the case of a flat plate, and the curved shape of the outer plate is further increased on both sides of the laser welded portion. By suppressing the bending with the out-of-plane deformation to the inside, it is possible to suppress the difference in the diffusion characteristics of the incident light in which the direction of the outer surface of the curved outer plate and the outer surface of the bent portion by laser welding match, A bent portion by laser welding can be made inconspicuous in the arrangement region of the inner arrangement material in which laser welding is performed in the longitudinal direction of the railway vehicle.

  According to another feature of the railway vehicle structure of the present invention, the effect of the one feature and the effect of the other feature are combined to make the welded portion less noticeable or less noticeable.

  The degree of unevenness of the rough surface is equivalent to No. 60 to 220 in terms of the grain size of the abrasive grains, so that the welded portion is made sufficiently inconspicuous by the rough surface and unevenness that do not impair the appearance of the outer plate. Can do.

  The outer plate can be formed in any pattern by embossing or etching a long outer plate by using a pattern processing material in which various patterns are formed in advance. In response to differences in laser welding orientation and laser welding areas and spot welding areas, welding marks such as bending and spot marks are not noticeable without post-finishing, It can be inconspicuous.

  Hereinafter, a railway vehicle structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 for understanding of the present invention. The following description and illustration are specific examples of the present invention, and do not limit the description of the scope of the claims.

  In the present embodiment, an inner arrangement material 3 as an aggregate disposed in the longitudinal direction of a railway vehicle shown in FIGS. 1, 2, and 4 is provided on an outer plate 2 mainly made of a stainless steel plate, as shown in FIG. The present invention is intended for a railway vehicle structure 1 having an inner arrangement member 4 as a column member facing inward, an inner arrangement member 5 as a reinforcing member, or a welded joint portion 6 with various kinds of overlapping members. However, the present invention is not limited to this, and for example, the outer plate 2 is effective even if it is made of a plain steel plate to be painted, and the weld joint 6 can be applied not only to laser welding but also to spot welding.

  The railcar structure 1 of the present embodiment is particularly shown in FIGS. 2 and 3 in which the outer plate 2 of at least the side structure 11 shown in FIGS. 1, 2, and 4 is embossed or etched on the outer surface. A linear rough surface pattern P1, P2, P3 facing in the longitudinal direction A or up and down direction B of the vehicle as shown, and a fine width having directionality in the longitudinal direction or up and down direction of the vehicle as shown in FIG. Fine concavo-convex pattern / pattern P4 having a shape and dense arrangement, and a fine width shape and dense arrangement having a vehicle longitudinal direction or vertical direction as shown in FIGS. A fine uneven pattern / pattern P5, P6, P7, P8, P9 having a linear or non-linear rough surface pattern oriented in the longitudinal direction or the vertical direction of the vehicle, and a fixed shape (not shown) ) Non-uniform concavo-convex pattern P10, a regular shape (not shown) as shown in FIG. 7, dense in an irregular shape, and a linear or non-linear rough surface oriented in the longitudinal or vertical direction of the vehicle It is assumed that at least one of the concavo-convex pattern P11, P12, P13, and P14 having the shape is formed.

  Thus, since the patterns P1 to P14 formed on the outer surface of the outer plate 2 are formed by embossing or etching, any pattern can be formed, and different patterns can be formed for each section. Corresponding to the difference of laser welding direction and the mixture of laser welding area and spot welding area, the welding marks such as bending and spot marks are visually blurred effect, buried effect, and assimilation degree with other surroundings The assimilation effect that increases the value and the combination thereof can be obtained.

  In particular, in the case of the linear rough surface patterns P1 to P3 oriented in the longitudinal direction or the vertical direction of the vehicle 1 shown in FIGS. 2 and 3, the incident light is orthogonal to the linear direction of the linear rough surface pattern. The direction of scattering is slightly bent in the direction of the bent portion by laser welding frequently used in the longitudinal direction A of the vehicle 1 in the linear rough surface pattern P1 in the longitudinal direction A of the vehicle 1. It is possible to obtain a visual blurring effect or an embedding effect that exhibits an appearance substantially equal to that of the background portion without regular reflection from the bent surface, and the sideways bent portion is inconspicuous or inconspicuous. Further, in the linear rough surface pattern P2 in the vertical direction B of the vehicle 1, the inner arrangement materials 4, 5 are arranged such that the incident light scattering direction is arranged in the vertical direction B of the vehicle 1 such as a pillar material or a reinforcing material. The vertical direction B along the bent portion by laser welding is a bending direction, and a visual blurring effect or burying effect is obtained that exhibits an appearance almost equivalent to the background portion without regular reflection from the bending surface. It is possible to make the bent portion of the orientation inconspicuous or inconspicuous. The linear rough surface patterns P1 and P2 in both the A and B directions can be individually applied to different welding areas, and the difference can be set as a pattern on the entire vehicle 1. 1 may be a pattern P3 obtained by combining linear rough surface patterns P1 and P2 oriented in the longitudinal direction A and the vertical direction B as shown in FIGS. Visual blurring effect or burial effect is obtained for both the bent portion by horizontal laser welding and the bent portion by vertical laser welding, both of which are not noticeable or conspicuous. The entire surface of the outer plate 2 can be made the same design.

  Further, as shown in FIG. 1 by simulating a convex portion or a concave portion with a broken line, the fine width shape having a directivity in the longitudinal direction A of the vehicle 1 and the fine concavo-convex pattern / pattern P4 having a dense arrangement are fine. Appearance with directionality according to the degree of density and density includes the assimilation effect that visually assimilate the bent part by the horizontal laser welding that matches it with the surrounding background, and shapes such as inclination and bending of the uneven surface The blurring effect and burying effect obtained by dispersing and reflecting the incident light in the bending direction of the bent portion by laser welding can be obtained somewhat, so that the bent portion by the horizontal laser welding is not noticeable or hardly noticeable. Bending parts by laser welding in the vertical direction can be dealt with by providing a fine concavo-convex pattern / pattern P4 in the vertical direction. This can be handled in substantially the same manner as the pattern. Here, the fine concavo-convex pattern / pattern P4 includes a continuous pattern and a discontinuous pattern, and the directionality in the case of the discontinuity is perpendicular to the interval between the concave portions or the convex portions in the direction to give the directionality. It is obtained by at least one of being smaller than the interval in the direction and having a direction in which the directionality of the concave portion or the convex portion is given is larger than the width in the direction perpendicular thereto. However, in order to effectively achieve visual assimilation or embedding of the bent part by laser welding, it is better to increase the directionality, the continuity is preferable, and the linear recess and the linear shape are perpendicular to the direction giving the directionality. It becomes a pattern in which convex portions are alternately arranged. In addition, the linear recesses and linear protrusions can be assimilated to the same extent as the width of the bent portion by laser welding, but the width of incident light is reduced to a fine width less than about the thickness where a plurality of linear uneven portions are placed on the bent portion. By disturbing the direction, you can get some visual blurring effect and burying effect, making it less noticeable or less noticeable. Also in this case, the scattering degree of incident light in the width direction can be further increased by using the inclination and curvature in the width direction together.

  Further, although not shown in the drawing, the fine concavo-convex pattern having a linear or non-linear rough surface pattern having the same directivity in at least one of the concave and convex portions of the pattern P4. When the pattern is used, laser welding is performed because the action and effect similar to those of the fine concavo-convex pattern / pattern P4 are combined with the directional or non-directional scattering action of the incident light by the linear or non-linear rough surface pattern. Since the blurring effect and the burying effect on the background around the bent portion can be further enhanced, the bent portion can be made more inconspicuous.

  Further, if the irregular shape / patterns P5 and P10 as shown in FIGS. 5 and 6 and the irregular shape as shown in FIG. 7 are used, the spot welding marks are assimilated according to the size and shape of the irregularities. It is easy, and depending on the similarity of the shape, a burying effect can be obtained somewhat. However, according to the experiments of the present inventor, although the patterning effect is obtained with the concavo-convex patterns / patterns P5 and P10 having the sizes shown in FIGS. 5, 6, and 7, regular reflection by the mirror surfaces of the concave and convex portions is obtained. However, the shape of the bent part by laser welding was made to appear and it was not possible to make it inconspicuous even by the rounded outer surface of the convex part. When the concavo-convex pattern / pattern P10 as shown in FIG. 7 is reduced to the size shown in FIG. 8, the continuity of the mirror surface is greatly lost, the conspicuous degree of the bent portion by laser welding starts to be halved, and the size is further reduced by half. Then, in addition to the patterning effect, the effect of making the bent part due to laser welding inconspicuous is also obtained.

  However, such regular and non-uniform concavo-convex patterns / patterns P5, P10 are linear or non-linear oriented in the longitudinal direction A or the vertical direction B of the vehicle 1 as shown in FIGS. When the uneven patterns / patterns P6 to P9 and P11 to P14 having a rough surface are formed, the continuous bent portions by laser welding are visually divided by the uneven pattern, and the linear rough surface and the uneven surface are used. The effect of finely scattering incident light in the direction orthogonal to the linear shape can provide a blurring effect or burial effect along the straight line of laser welding. Depending on the non-linear rough surface or uneven surface, Due to the non-directed fine scattering, the effect of blurring or burying of the bent part can be obtained regardless of the direction of laser welding, so that the bent part by laser welding is not conspicuous in combination with the patterning by the uneven pattern, It can be difficult to start.

  By the way, according to the experiment by the present inventors, the roughness degree of the rough surface is preferably equivalent to Nos. 60 to 220 in terms of the grain size of the abrasive grains, and is rough enough not to impair the appearance of the outer plate 2. By the surface and the uneven surface, a blurring effect, a buried effect, and an assimilation effect with respect to the background of the weld mark in the weld joint 6 can be sufficiently obtained and can be made inconspicuous.

  Further, the outer plate 2 can be formed by embossing or etching the long outer plate 2 as a pattern processing material in which various patterns are formed in advance. The pattern can be formed, and it corresponds to the difference in the direction of laser welding and the mixture of laser welding area and spot welding area, so that the welding traces such as bending and spot traces can be visually blurred without post-finishing In addition to effects, burial effects, assimilation effects that increase the degree of assimilation with the surroundings, and combinations thereof can be obtained.

  The railway vehicle structure 1 shown in FIG. 4 has a range of 1500 to 10000 mm in a range in which the outer plate 2 of the side structure 11 covers at least the arrangement area of the inner arrangement material 3 to be welded by laser welding in the longitudinal direction of the railway vehicle 1. Curved vertically with a radius of curvature. In this way, the outer plate 2 is bent in the protruding direction of the bent portion formed by laser welding in the longitudinal direction of the inner arrangement member 3 and the railcar 1, and the outer plate 2 is curved with a curvature radius of 1500 to 10,000 mm. By matching the protruding directions, it is common in terms of the diffuse reflection characteristics of incident light, the bending rate and the protruding rate of the outer surface of the bent portion with respect to the outer surface of the outer plate 2 are reduced as compared with the flat plate, and the curvature of the outer plate 2 is reduced. As for the shape, the laser welding joint 6 is used as a boundary, and both sides of the laser welding joint 6 are deformed to be bent inward with out-of-plane deformation to the inside of the peripheral part. Also, since the bending rate and the protrusion rate of the outer surface of the bent portion by laser welding with respect to the outer surface of the outer plate 2 are reduced, the directions of the outer surface of the curved outer plate 2 and the outer surface of the bent portion by laser welding coincide with each other. Diffuse incident light In the arrangement region of the inner arrangement material in which laser welding is performed in the longitudinal direction A of the railway vehicle 1 while suppressing the difference in properties, a blurring effect or a buried effect on the background of the bent portion by laser welding can be obtained and can be made inconspicuous. .

  However, the curved shape of the outer plate 2 of the side structure 11 can be used in combination with the above-described various patterns P1 to P14 to make welding traces by laser welding or spot welding more inconspicuous or inconspicuous. .

  INDUSTRIAL APPLICABILITY The present invention can be practically used for an outer plate having a welded joint portion with an inner arrangement material of a railway vehicle structure, and welding marks are not noticeable or difficult to notice.

It is a partial side view which shows one example of the side structure which has the fine uneven | corrugated pattern and pattern in the outer plate | board in the railway vehicle structure of embodiment which concerns on this invention. It is a partial side view which shows another example of the side structure which has the linear rough surface pattern in the outer plate | board in the railway vehicle structure of embodiment which concerns on this invention. It is a schematic diagram which shows the example of a linear rough surface pattern given to the outer surface of the outer plate | board of FIG. 2 with a scale. It is a cross-sectional view which shows the example which curved the outer plate | board of the railway vehicle structure of embodiment which concerns on this invention to the up-down direction, and is used together with various patterns. FIG. 4 is a pattern diagram showing a typical uneven pattern / pattern example having a rough surface that is linear or non-linear, applied to the outer plate of the side structure in the railway vehicle structure according to the embodiment of the present invention. is there. Another example of irregular concavo-convex pattern / pattern applied to the outer plate of the side structure in the railway vehicle structure according to the embodiment of the present invention, a pattern showing a fine concavo-convex pattern / pattern example having linear and non-linear rough surfaces FIG. The pattern figure which shows the fine uneven | corrugated pattern and pattern example with a rough surface of a linear and a non-linear form applied to the outer plate | plate of the side structure in the railway vehicle structure of embodiment which concerns on this invention It is. It is a pattern figure which shows the finer atypical uneven | corrugated pattern and pattern example applied to the outer plate | board of the side structure in the railway vehicle structure of embodiment which concerns on this invention. It is sectional drawing which shows the bending part as a line-shaped welding trace made in the laser welding joining part with the inner side arrangement | positioning material of the outer plate | board of the side structure in the vehicle structure of a rail vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rail vehicle structure 2 Outer plate 3, 4, 5 Inner arrangement | positioning material 4 Side beam 6 Welded joint 11 Side structure A Longitudinal direction B of vehicle B Vertical direction of vehicle

Claims (5)

  In a railway vehicle structure having a welded joint with an inner arrangement material or a laminated material on the outer plate, at least the outer plate of the side structure has a longitudinal or vertical direction of the vehicle by embossing or etching on the outer surface. Line-shaped rough surface pattern facing the vehicle, fine width shape and densely arranged fine uneven pattern / pattern with the vehicle longitudinal direction and vertical directionality, vehicle longitudinal direction and vertical directionality A fine uneven pattern / pattern, regular, non-pattern with a linear or non-linear rough surface pattern oriented in the longitudinal direction and / or vertical direction of the vehicle in at least one of the concave and convex portions in a fine width shape and dense arrangement Rough patterns / patterns with a rough or rough surface that are linear or non-linear in the longitudinal or vertical direction of the vehicle. Railway car body structure, characterized in that at least one of which is formed of.   In a railway vehicle structure having a welded joint with an inner arrangement material or a laminated material on the outer plate, the outer plate of the side structure has at least an arrangement area of the inner arrangement material to be laser welded in the longitudinal direction of the railway vehicle. A railway vehicle structure having a curvature radius of 1500 to 10000 mm and a vertical curvature in a covered range.   In a railway vehicle structure having a welded joint with an inner arrangement material or a laminated material on the outer plate, at least the outer plate of the side structure has a longitudinal or vertical direction of the vehicle by embossing or etching on the outer surface. Line-shaped rough surface pattern facing the vehicle, fine width shape and densely arranged fine uneven pattern / pattern with the vehicle longitudinal direction and vertical directionality, vehicle longitudinal direction and vertical directionality A fine uneven pattern / pattern, regular, non-pattern with a linear or non-linear rough surface pattern oriented in the longitudinal direction and / or vertical direction of the vehicle in at least one of the concave and convex portions in a fine width shape and dense arrangement Rough patterns / patterns with a rough or rough surface that are linear or non-linear in the longitudinal or vertical direction of the vehicle. At least one is formed, and in a range that covers at least the placement area of the inner arrangement material for welding, the railway car body structure, characterized in that curved in the vertical direction with a radius of curvature of 1500~10000mm of.   The railcar structure according to any one of claims 1 and 3, wherein the unevenness degree of the rough surface corresponds to Nos. 60 to 220 in terms of the grain size of the abrasive grains.   The railcar structure according to any one of claims 1, 3, and 4, wherein the outer plate is made of a pattern processing material in which various patterns are formed in advance.

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