JP2010221267A - Pressing tool for metallic material and welding method for metallic material using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressing tool for a metallic material with which a pressurizing force added to the metallic material can be kept fixed in the longitudinal direction, and to provide a welding method for a metallic material using this tool. <P>SOLUTION: In the pressing tool 21, a divided member 23 on which a pressure roller 13 is abutted is pressed down with respect to other divided members 23, and an outer board 1 and a frame member 2 are pressed only by the pressed-down divided member 23. Here, since the difference of rigidity between the end part and the intermediate part of the divided members 23 is small, pressurizing force added from the divided member 23 to the outer board 1 and the frame member 2 is equalized regardless of the position where the pressure roller 13 abuts on the divided member 23. Accordingly, even when the pressure roller 13 is moved in the longitudinal direction while the pressurizing force is kept fixed, by successively pressing down the divided member 23 on which the pressure roller 13 is abutted, the pressurizing force added to the outer board 1 and the frame member 2 is kept fixed in the longitudinal direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a metal material holding jig and a metal material welding method.

  2. Description of the Related Art Conventionally, when performing overlap welding of long metal materials, a method has been used in which a metal material overlap portion is brought into close contact with the vicinity of the welded portion by a pressing roller. For example, in Patent Document 1, an outer plate reinforcing member having a hat-shaped cross section is superimposed on an outer plate used for a railway vehicle structure, and the outer plate reinforcing member is covered with a long pressing jig.

  Then, a pressing roller is disposed on the pressing jig, and welding is performed while pressing the outer plate and the outer plate reinforcing member together with the pressing member (see FIG. 14 (b) of cited document 1). Although a method of directly pressing the vicinity of the welding location with a pressing roller without using a pressing jig is also conceivable, there is a risk that the pressing roller and the metal material will be in point contact and the metal material may be deformed due to the thermal effect during welding. is there.

JP 2006-27366 A

  However, even if a holding jig is used, the following problems occur in the conventional method described above. In other words, the middle part of the long pressing jig is less rigid than the end part. Therefore, when the pressing roller is moved in the longitudinal direction while keeping the pressing force constant, the end part of the metal material is pressed. There will be a difference between the pressing force when pressing and the pressing force when pressing the middle part of the metal material.

  On the other hand, in order to keep the pressing force applied to the metal material constant with respect to the longitudinal direction, the pressing roller is used when the pressing roller is positioned at the end of the pressing jig and when it is positioned in the middle of the pressing jig. It is also conceivable to change the pressing force due to. However, in this case, a control means for changing the pressing force is required in the mechanism on the side of the pressing roller, and there is a problem that the apparatus configuration becomes complicated.

  The present invention has been made to solve the above-described problems, and a metal material holding jig capable of maintaining a pressing force applied to a metal material constant in the longitudinal direction, and a metal material using the same An object of the present invention is to provide a welding method.

  In order to solve the above-mentioned problems, a metal material holding jig according to the present invention is disposed between one of the stacked metal materials and the pressing roller, and is a metal material that presses the metal material with the pressing force from the pressing roller. A holding jig, comprising a plate-like main body portion extending along the longitudinal direction of the metal material, the main body portion comprising a plurality of divided members arranged in the longitudinal direction, and the plurality of divided members being a pressing roller The split members hitting each other are connected to each other so as to be able to be pushed down with respect to the other split members.

  In this metal material holding jig, when the pressing jig is pressed by the pressing roller, the divided member to which the pressing roller hits is pressed down against the other divided members, and the metal material can be pressed only by the pressed divided member. it can. Here, the dividing member is divided so as to be aligned in the longitudinal direction of the metal material. For this reason, since the difference in rigidity between the end portion and the intermediate portion of the divided member is small compared to a conventional long holding jig with an integral body portion, the position where the pressing roller hits the divided member. Regardless, the pressing force applied to the metal material from the divided member is equalized. Therefore, even when the pressing roller is moved in the longitudinal direction while keeping the pressing force constant, the pressing force applied to the metal material is reduced with respect to the longitudinal direction by sequentially pressing down the divided members that the pressing roller hits. Can be kept constant.

  In addition, one of the metal materials has a hat shape in cross section by a pair of flange portions abutting against the other of the metal materials, a pair of web portions rising from the flange portions, and a top portion connecting between the web portions. Each has a contact part that contacts the top, and the contact parts are preferably connected to each other by a hinge. In this case, since it can suppress that the pressing force from a press roller is transmitted to the adjacent division member, a metal material can be pressed with a more equal pressing force by the division member which a press roller contacts.

  In this case, it is preferable that each of the divided members further has an abutting portion that abuts at least one of the web portions. If it carries out like this, it will become possible to hold down a metal material more reliably by the contact part contact | abutted to a web part.

  In addition, one of the metal materials has a hat shape in cross section by a pair of flange portions abutting against the other of the metal materials, a pair of web portions rising from the flange portions, and a top portion connecting between the web portions. Each of these has a contact part which contacts each flange part, and a connection part which connects contact parts, and it is preferred that the connection parts are mutually connected by a hinge. According to this configuration, the metal material can be pressed in the vicinity of the welded portion by the contact portion that contacts the flange portion.

  Further, one of the metal materials has a hat shape in cross section by a pair of flange portions that contact the other of the metal materials, a pair of web portions that rise from the flange portions, and a top portion that connects between the web portions. Has a plate-like portion extending in the longitudinal direction along one of the web portions, and each of the divided members has a contact portion that comes into contact with the top, and the contact portion is plate-like by a hinge. It is preferable that it is connected to the part. In this case, since it can suppress that the pressing force from a press roller is transmitted to the adjacent division member, a metal material can be pressed with a more equal pressing force by the division member which a press roller contacts.

  In this case, it is preferable that each of the dividing members further has a contact portion that contacts the other of the web portions. If it carries out like this, it will become possible to hold down a metal material more reliably by the contact part contact | abutted to a web part.

  Further, one of the metal materials has a hat shape in cross section by a pair of flange portions that contact the other of the metal materials, a pair of web portions that rise from the flange portions, and a top portion that connects between the web portions. Has a plate-like portion that extends in the longitudinal direction along one of the web portions and abuts against one of the flange portions, and each of the divided members has a contact portion that abuts against the other of the flange portions, Preferably, the connecting portion extends from the abutting portion to the plate-like portion corresponding to the top portion, and the connecting portion is connected to the plate-like portion by a hinge. According to this configuration, the metal material can be pressed in the vicinity of the welded portion by the contact portion that contacts the flange portion.

  Further, in the metal material welding method according to the present invention, the metal material pressing jig described above is disposed between one of the stacked metal materials and the pressure roller, and the divided member is pressed down by the pressure roller. It is characterized by welding the overlapping parts of metal materials at corresponding positions.

  In this metal material welding method, by using the pressing jig described above, even when the pressing roller is moved in the longitudinal direction while maintaining the pressing force constant, the divided members to which the pressing roller hits are sequentially pushed down. By doing so, the pressing force applied to the metal material can be kept constant with respect to the longitudinal direction. As a result, since the overlapping portions of the metal materials can be evenly adhered, a sound weld can be formed.

  According to the metal material pressing jig of the present invention, the pressing force applied to the metal material can be maintained constant with respect to the longitudinal direction. Moreover, according to the welding method of the metal material which concerns on this invention, the sound welding part can be formed in the overlapping part of a metal material.

It is a perspective view which shows one Embodiment of the welding method of the metal material which concerns on this invention. It is a perspective view which shows the pressing jig used for the welding method of the metal material shown in FIG. FIG. 3 is a development view of the holding jig shown in FIG. 2. It is a figure which shows the effect of the pressing jig shown in FIG.2 and FIG.3. It is a perspective view which shows the modification of the pressing jig which concerns on this invention. It is an expanded view of the holding jig shown in FIG. It is a figure which shows the effect of the pressing jig shown in FIG.5 and FIG.6. It is a figure which shows another modification of the holding jig which concerns on this invention. It is a figure which shows another modification of the pressing jig which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a metal material holding jig and a metal material welding method using the same according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an embodiment of a metal material welding method according to the present invention. As shown in FIG. 1, this metal material welding method is applied to, for example, lap welding of metal materials. In FIG. 1, the outer plate | board 1 for rail vehicle vehicle structures and the bone member 2 for reinforcing the outer plate | board 1 are illustrated as a metal material used as welding object.

  The outer plate 1 is made of, for example, stainless steel and has a flat plate shape with a thickness of about 1 mm. The bone member 2 is made of, for example, stainless steel similar to the outer plate 1 to a thickness of about 1 mm, and a pair of flange portions 3 and 3 abutting on the outer plate 1 and a pair of webs rising from the flange portions 3 and 3. A section hat shape is formed by the portions 4 and 4 and the top portion 5 connecting the web portions 4 and 4.

  For welding the outer plate 1 and the bone member 2, a welding head 11 having a welding torch 12 and a pressing roller 13 integrally attached thereto, and a pressing jig 21 disposed between the welding head 11 and the bone member 2 are used. And are used. The welding head 11 is disposed above the outer plate 1 and the bone member 2 and can be scanned in the longitudinal direction of the bone member 2 based on a control signal from a control unit (not shown).

  Next, the holding jig 21 will be described in detail. FIG. 2 is a perspective view showing the holding jig, and FIG. 3 is a developed view thereof.

  As shown in FIGS. 2 and 3, the holding jig 21 is formed of, for example, general steel having a thickness of about 3.2 mm to 4.5 mm, and has a long main body portion 22 that is substantially the same as the length of the bone member 2, for example. have. The main body portion 22 of the pressing jig 21 is composed of a plurality of U-shaped divided members 23 arranged in the longitudinal direction. In addition, it is preferable that the thickness of the pressing jig 21 is equal to or greater than the thickness of the metal material to be pressed.

  Each of the divided members 23 has a contact portion 24 that contacts the top portion 5 of the bone member 2 and contact portions 25 and 25 that contact the web portions 4 and 4 of the bone member 2. An end portion in the arrangement direction of the divided members 23 in the contact portion 24 and an end portion in the arrangement direction of the divided members 23 in the contact portions 24 of the adjacent divided members are connected to each other by a hinge 26. Thereby, each of the divided members 23 is swingable about the axis of the hinge 26 with respect to the adjacent divided member 23.

  When welding the outer plate 1 and the bone member 2, first, the contact portion 24 of each divided member 23 contacts the top 5 of the bone member 2, and the contact portions 25, 25 are the web portion 4 of the bone member 2. , 4 are placed on the bone member 2 so as to abut each other. Next, the welding head 11 is set at one end of the holding jig 21.

  Thereby, the pressing force by the pressing roller 13 is applied to the pressing jig 21, and the overlapping portion of the outer plate 1 and the flange portion 3 of the bone member 2 is brought into close contact. In addition, the welding torch 12 is disposed directly above the one flange portion 3 at a position corresponding to the pressing location of the pressing roller 13. When the welding torch 12 operates in this state, welding of the overlapping portion of the outer plate 1 and the flange portion 3 of the bone member 2 is started.

  Next, when the welding head 11 is scanned from one end portion of the holding jig 21 toward the other end portion, a continuous weld portion is formed at the overlapping portion of the outer plate 1 and the flange portion 3 of the bone member 2. It is formed. When a continuous weld is formed in the overlapping portion of the outer plate 1 and the flange portion 3 on the opposite side of the bone member 2 in the same manner, the welding of the outer plate 1 and the bone member 2 is completed.

  FIG. 4 is a diagram showing the operational effect of the holding jig 21. In the holding jig 21, as described above, the main body portion 22 is composed of a plurality of divided members 23 arranged in the longitudinal direction, and the contact portion 24 of the divided member 23 and the contact portion 24 of the adjacent divided member 23 are hinges. 26 is swingably connected. In the pressing jig 21 having such a configuration, when the pressing jig 21 is pressed by the pressing roller 13, the divided member 23 to which the pressing roller 13 hits is pressed down with respect to the other divided member 23, and the pressed divided member is pressed. The outer plate 1 and the bone member 2 can be pressed only by 23.

  Here, the dividing member 23 is divided so as to be aligned in the longitudinal direction of the bone member 2. For this reason, compared with the conventional long holding jig with a single main body portion, the difference in rigidity between the end portion and the intermediate portion of the divided member 23 is small, so that the pressing roller 13 hits the divided member 23. Regardless of the position, the pressing force applied from the divided member 23 to the outer plate 1 and the bone member 2 is equalized. Therefore, even when the pressing roller 13 is moved in the longitudinal direction while keeping the pressing force constant, the divided members 23 to which the pressing roller 13 comes into contact are sequentially pushed down to be applied to the outer plate 1 and the bone member 2. The pressing force can be kept constant with respect to the longitudinal direction.

  In the holding jig 21, the contact portions 25 and 25 of the split member 23 are in contact with the web portions 4 and 4 of the bone member 2. By the contact portions 25, 25, the bone member 2 can be more reliably pressed at the portions excluding the flange portions 3, 3. Further, in the holding jig 21, since the difference in rigidity between the end portion and the intermediate portion of the divided member 23 is small, the rigidity required for each divided member 23 can be small, and the main body portion can be made as in the conventional case. The overall rigidity can be reduced as compared with a single long holding jig. Therefore, the weight of the holding jig 21 can be reduced.

  By using the holding jig 21 as described above, in this metal material welding method, the overlapping portion of the outer plate 1 and the flange portion 3 of the bone member 2 can be brought into close contact with each other. Part can be formed. Further, since it is not necessary to provide a control means for gradually changing the pressing force in the mechanism on the pressing roller 13, the complication of the apparatus configuration can be avoided.

  Furthermore, the pressing force applied from the divided member 23 to the outer plate 1 and the bone member 2 is equalized regardless of the position where the pressing roller 13 hits the divided member 23. The roller 13 can be disposed so as not to protrude from the end of the bone member 2. This contributes to an improvement in the degree of freedom of welding.

  Next, a modification of the metal material holding jig according to the present invention will be described. FIG. 5 is a perspective view showing a modification of the metal material pressing jig according to the present invention. FIG. 6 is a development view thereof. As shown in FIGS. 5 and 6, the holding jig 31 according to the modification is formed of, for example, a general steel having a thickness of about 3.2 mm to 4.5 mm, and is, for example, a long length substantially equal to the length of the bone member 2. The main body portion 32 is provided.

  The main body portion 32 is configured in a U-shaped cross section by a plate-like portion 33 extending in the longitudinal direction along one web portion 4 of the bone member 2 and a plurality of divided members 34 arranged in the longitudinal direction. . Each of the divided members 34 has a contact portion 35 that contacts the top portion 5 of the bone member 2 and a contact portion 36 that contacts the other web portion 4 of the bone member 2.

  An end portion of the contact portion 35 in a direction orthogonal to the arrangement direction of the dividing members 23 is a position corresponding to a corner portion of the bone member 2 defined by the web portion 4 and the top portion 5, and the plate-like portion 33 by the hinge 37. It is connected to the end of the. Thereby, each of the dividing members 34 is swingable with respect to the plate-like portion 33 around the axis of the hinge 37.

  Also in such a holding jig 31, as shown in FIG. 7, when the pressing jig 31 is pressed by the pressing roller 13, the divided member 34 to which the pressing roller 13 hits is pressed down like the keyboard with respect to the other divided members 34. Thus, the outer plate 1 and the bone member 2 can be pressed only by the divided member 34 pushed down. Therefore, even when the pressing roller 13 is moved in the longitudinal direction while maintaining the pressing force constant, the divided members 34 to which the pressing roller 13 hits are sequentially pushed down to be applied to the outer plate 1 and the bone member 2. The pressing force can be kept constant with respect to the longitudinal direction.

  In the holding jig 31, the plate-like portion 33 is in contact with one web portion 4 of the bone member 2, and the contact portion 36 of the dividing member 34 is in contact with the other web portion 4 of the bone member. Thereby, it becomes possible to hold down the bone member 2 more reliably at the portion excluding the flange portions 3 and 3. Further, in the holding jig 31, since the difference in rigidity between the end portion and the intermediate portion of the divided member 34 is small, the rigidity required for each divided member 34 can be small, and the main body portion is different from the conventional one. The overall rigidity can be reduced as compared with a single long holding jig. Accordingly, the weight of the holding jig 31 can be reduced.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, welding of a linear long member such as the bone member 2 is exemplified, but the pressing jig according to the present invention can be applied to a curved long member. In this case, for example, the contact portion 24 and the plate-like portion 33 may be formed in an R shape in accordance with the shape of the bone member, and the angle of the contact portion 25 with respect to the contact portion 24 may be appropriately changed. Further, from the viewpoint of weight reduction of the holding jigs 21 and 31, the contact portion 25 and the contact portion 36 are not necessarily provided.

  Furthermore, in the holding jigs 21 and 31 described above, the abutting portions 24 and 35 come into contact with the top 5 of the bone member 2. For example, as shown in FIG. Alternatively, the width of the contact portion 24 and the height of the contact portions 25 and 25 may be expanded so that only the tips of the contact portions 25 and 25 are in contact with the flange portions 3 and 3. Further, for example, as shown in FIG. 8 (b), only the height of the contact portions 25, 25 in the pressing jig 21 is expanded, and the contact portions 25, 25 are brought into contact with the web portions 4, 4, You may make it contact | abut the front-end | tip of the contact parts 25 and 25 to the flange parts 3 and 3. FIG. According to this configuration, the bone member 2 can be pressed near the welded portion by the contact portions 25 and 25.

  Similarly, for example, as shown in FIG. 9A, the width of the abutting portion 35 and the height of the plate-like portion 33 and the abutting portion 36 in the pressing jig 31 are expanded, respectively. Alternatively, only the tip of the contact portion 36 may be brought into contact with the flange portions 3 and 3. Further, for example, as shown in FIG. 9B, only the height of the plate-like portion 33 and the contact portion 36 in the pressing jig 31 is expanded, and the plate-like portion 33 and the contact portion 36 are made to be the web portions 4 and 4. You may make it contact | abut the front-end | tip to the flange parts 3 and 3, making it contact | abut. According to this configuration, the bone member 2 can be pressed near the welded portion by the plate-like portion 33 and the contact portion 36.

  DESCRIPTION OF SYMBOLS 1 ... Outer plate (metal material), 2 ... Bone member (metal material), 3 ... Flange part, 4 ... Web part, 5 ... Top part, 13 ... Pressure roller, 21, 31 ... Holding jig, 22, 32 ... Main body Parts 23, 34, divided members, 24, contact parts, 25, contact parts, 26, 37, hinges, 33, plate-like parts, 35, contact parts, 36, contact parts.

Claims (8)

A metal material holding jig, which is disposed between one of the metal materials stacked and the pressure roller, and presses the metal material by a pressing force from the pressure roller,
A plate-shaped main body portion extending along the longitudinal direction of the metal material;
The main body portion is composed of a plurality of divided members arranged in the longitudinal direction,
The metal member holding jig is characterized in that the plurality of divided members are connected to each other so as to be swingable so that the divided member to which the pressing roller hits can be pushed down with respect to the other divided members. One of the metal materials has a hat shape in cross section by a pair of flange portions abutting against the other of the metal materials, a pair of web portions rising from the flange portions, and a top portion connecting between the web portions,
2. The metal material holding jig according to claim 1, wherein each of the divided members has a contact portion that contacts the top portion, and the contact portions are connected to each other by a hinge.   The metal material holding jig according to claim 2, wherein each of the divided members further includes a contact portion that contacts at least one of the web portions. One of the metal materials has a hat shape in cross section by a pair of flange portions abutting against the other of the metal materials, a pair of web portions rising from the flange portions, and a top portion connecting between the web portions,
Each of the divided members has an abutting portion that abuts on the flange portion and a connecting portion that connects the abutting portions, and the connecting portions are connected to each other by a hinge. The metal material pressing jig according to claim 1. One of the metal materials has a hat shape in cross section by a pair of flange portions abutting against the other of the metal materials, a pair of web portions rising from the flange portions, and a top portion connecting between the web portions,
The main body portion has a plate-like portion extending in the longitudinal direction along any one of the web portions,
2. The metal member presser treatment according to claim 1, wherein each of the divided members has a contact portion that contacts the top portion, and the contact portion is connected to the plate-shaped portion by a hinge. Ingredients.   The metal material pressing jig according to claim 5, wherein each of the divided members further includes a contact portion that contacts the other of the web portions. One of the metal materials has a hat shape in cross section by a pair of flange portions abutting against the other of the metal materials, a pair of web portions rising from the flange portions, and a top portion connecting between the web portions,
The main body portion has a plate-like portion that extends in the longitudinal direction along one of the web portions and contacts one of the flange portions,
Each of the split members has a contact portion that contacts the other of the flange portions, and a connection portion that extends from the contact portion to the plate-like portion corresponding to the top portion, and the connection portion is a hinge. The metal material pressing jig according to claim 1, wherein the metal material pressing jig is connected to the plate-like portion.   A metal material pressing jig according to any one of claims 1 to 7 is disposed between one of the metal materials superimposed and the pressure roller, and the divided member pressed against the pressure roller. A method for welding a metal material, comprising welding the overlapping portion of the metal material at a corresponding position.

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