JP2017131954A - Cooler and welding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooler and a welding device which can suppress thermal deformation of a plate material regardless of the shape of the plate material to be welded.SOLUTION: A welding device (10) includes: coolers (4A, 4B); and a welding torch (2). The coolers (4A, 4B) cool plate materials (M1, M2) during welding. The welding torch (2) is arranged between the cooler (4A) and the cooler (4B). Each of the coolers (4A, 4B) includes: a plurality of cooling bodies (41): and a plurality of support bodies (43). The plurality of cooling bodies (41) are arranged side by side in a welding direction (X) of the plate materials (M1, M2). The plurality of cooling bodies come into contact with surfaces (S1, S2) to be cooled of the plate materials (M1, M2). A plurality of support bodies (43) are provided corresponding to the plurality of cooling bodies (41). Each of the support bodies (43) movably supports the corresponding cooling body (41) to be inclined to a horizontal plane. Each of the support bodies (43) presses the corresponding cooling body (41) against the surfaces (S1, S2) to be cooled of the plate materials (M1, M2).SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a cooler, and more particularly to a cooler for cooling a plate material during welding. The present disclosure also relates to a welding apparatus including a cooler.

  When welding metal plate materials, thermal deformation may occur in each plate material due to thermal strain generated due to welding heat input. The thermal deformation of the plate material is not only unfavorable in appearance, but also affects the performance of products in which the plate material is used. For this reason, a heat deformation part may be corrected with a press etc. after welding. In this case, since time and labor are required for correction, man-hours increase. In addition, a product may be designed in consideration of thermal deformation of the plate material. In this case, too much trial and error is required for the design, so that the man-hours are also increased.

  In order to reduce the number of steps, it is preferable to suppress thermal deformation of the plate material during welding. As one method for suppressing thermal deformation, there is a method of forcibly removing heat around a welded portion of a plate material during welding to alleviate thermal strain due to a temperature gradient.

  For example, Patent Document 1 discloses a plate material cooler during welding. In the cooler of Patent Document 1, a cooling box having an open bottom surface is disposed on a welding line of a plate material, and cooling water is supplied into the cooling box. Thereby, a board | plate material and a weld bead are cooled, and the thermal deformation of a board | plate material is suppressed.

  Patent Document 2 also discloses a plate material cooler during welding. In the cooler of Patent Document 2, shells are arranged on the left and right sides of the welded portion of the plate material, and the refrigerant is circulated inside each shell. Thereby, cooling lines are formed on both sides of the weld. In the plate material, heat is hardly transmitted to the portion outside the cooling line, and thermal deformation of the portion is suppressed.

JP 2002-153988 A JP 2001-71129 A

  In the cooler of patent document 1, a single cooling box is arrange | positioned on the welding line of the board | plate material welded. If the plate material to be welded is flat, the entire cooling box is pressed against the plate material. However, when the plate material to be welded is curved, a portion that strongly contacts the plate material and a portion that does not easily contact the plate material are generated in the cooling box.

  In the cooler of Patent Document 2, each shell extends from the vicinity of one end of the welded portion to the vicinity of the other end. The shell body having such a shape cannot uniformly contact the plate material when the plate material to be welded is curved.

  As described above, in the coolers such as Patent Documents 1 and 2, depending on the shape of the plate material to be welded, contact between the cooler and the plate material becomes non-uniform, and effective cooling of the plate material cannot be expected. If the plate material is not cooled effectively at the time of welding, thermal distortion occurs due to welding heat input in the plate material, resulting in thermal deformation.

  An object of the present disclosure is to provide a cooler and a welding apparatus that can suppress thermal deformation of a plate material, regardless of the shape of the plate material to be welded, particularly for a plate material made of metal.

  The cooler according to the present disclosure cools the plate material during welding. The cooler includes a plurality of cooling bodies and a plurality of support bodies. The plurality of cooling bodies are arranged side by side in the welding direction of the plate material. The plurality of cooling bodies are in contact with the surface to be cooled of the plate material. The plurality of supports are provided corresponding to the plurality of cooling bodies. Each of the supports supports the corresponding cooling body so as to be inclined with respect to the horizontal plane. Each of the supports presses the corresponding cooling body against the surface to be cooled of the plate material.

  The welding apparatus according to the present disclosure welds the first plate member and the second plate member. The welding apparatus includes a first cooler, a second cooler, and a welding torch. The first and second coolers have the above-described configuration. The first cooler cools the first plate member during welding. The second cooler cools the second plate member during welding. The welding torch is disposed between the first cooler and the second cooler.

  According to the present disclosure, thermal deformation of a plate material can be suppressed regardless of the shape of the plate material to be welded.

FIG. 1 is a perspective view illustrating a schematic configuration of a welding apparatus according to an embodiment. FIG. 2 is a front view of the welding apparatus shown in FIG. FIG. 3 is a perspective view showing a part of a cooler provided in the welding apparatus shown in FIG. 1. FIG. 4 is a side view of the cooler shown in FIG. 3. FIG. 5 is a perspective view showing a configuration of a support provided in the cooler shown in FIG. 3. FIG. 6 is a perspective view showing an operation during welding of the cooler shown in FIG. 3. FIG. 7 is a side view of the cooler shown in FIG.

  When the plate members are welded to each other, a temperature gradient is generated in each plate member and heat distortion occurs. The thermal deformation of the plate material occurs when the plate material undergoes plastic deformation due to this thermal strain.

  In order to suppress thermal deformation of the plate material, it is necessary to reduce the thermal strain by relaxing the temperature gradient generated in the plate material. As a method for mitigating the temperature gradient, there is a method in which the periphery of the welded portion of the plate material is cooled by a cooler and heat is extracted from the vicinity of the welded portion of the plate material. The cooler includes a cooling body made of a material having high thermal conductivity. The cooler removes heat from the plate material by bringing the cooling body into contact with the plate material during welding.

  The amount of heat removal is related to the contact pressure between the cooling body and the plate material. In order to increase the amount of heat removal, it is necessary to bring the cooling body and the plate material into close contact with each other and press the plate material sufficiently with the cooling body.

  It is preferable that the cooling body presses the plate material uniformly throughout. In a cooling body, when the pressing force with respect to a board | plate material changes with places, a difference arises also in the heat removal amount from a board | plate material. When the pressing force becomes extremely uneven and the difference in heat removal exceeds the allowable range, thermal deformation occurs in the plate material. Such a problem is likely to occur when the plate to be welded is curved.

  Based on the above findings, the present inventors have devised a cooler and a welding apparatus according to the embodiment.

  The cooler according to the embodiment cools the plate material during welding. The cooler includes a plurality of cooling bodies and a plurality of support bodies. The plurality of cooling bodies are arranged side by side in the welding direction of the plate material. The plurality of cooling bodies are in contact with the surface to be cooled of the plate material. The plurality of supports are provided corresponding to the plurality of cooling bodies. Each of the supports supports the corresponding cooling body so as to be inclined with respect to the horizontal plane. Each of the supports presses the corresponding cooling body against the surface to be cooled of the plate (first configuration).

  In the first configuration, each cooling body is movably supported by the support so as to be inclined with respect to the horizontal plane. According to this structure, each cooling body inclines according to the shape of the pressed part, when it is pressed on the to-be-cooled surface of a board | plate material. That is, even when the surface to be cooled of the plate material is not a horizontal surface, the plurality of cooling bodies follow the surface to be cooled of the plate material. Thereby, a some cooling body presses a board | plate material uniformly, and removes heat from a board | plate material uniformly. Therefore, thermal deformation of the plate material can be suppressed.

  The cooler can further include a plurality of elastic bodies. Each of the elastic bodies is disposed between two adjacent cooling bodies among the plurality of cooling bodies, and couples the two cooling bodies. Preferably, each of the plurality of cooling bodies and the plurality of elastic bodies has a frame shape and constitutes a refrigerant passage extending in the welding direction (second configuration).

  In the second configuration, the refrigerant passage is formed by connecting the frame-shaped cooling body and the elastic body, respectively. At the time of welding the plate material, the temperature rise of the cooling body can be suppressed by passing the refrigerant through the refrigerant passage. Therefore, the heat removal effect of the plate material by the cooling body can be enhanced, and the thermal deformation of the plate material can be more reliably suppressed.

  Each of the supports may support the corresponding cooling body so as to be rotatable around a horizontal axis orthogonal to the welding direction (third configuration).

  In the third configuration, the cooling body rotates around a horizontal axis orthogonal to the welding direction. When the surface to be cooled of the plate member has a gradient in the welding direction, the cooling body can be inclined along the gradient and follow the surface to be cooled of the plate member.

  The welding apparatus according to the embodiment welds the first plate member and the second plate member. The welding apparatus includes a first cooler, a second cooler, and a welding torch. The first and second coolers have at least a first configuration. The first cooler cools the first plate member during welding. The second cooler cools the second plate member during welding. The welding torch is disposed between the first cooler and the second cooler (fourth configuration).

  In the welding apparatus, the first and second coolers have at least a first configuration. For this reason, the first and second coolers can cause the plurality of cooling bodies to follow the first and second plate members, respectively. Therefore, each plate is uniformly pressed by a plurality of cooling bodies regardless of its shape. Thereby, the amount of heat removed from each plate becomes uniform, and thermal deformation of each plate can be suppressed.

  Each of the first and second plate members may have a curved shape. The welding apparatus can further include a stage. The stage may include a curved surface for arranging the first and second plate members (fifth configuration).

  According to the 5th structure, the curved 1st and 2nd board | plate material can be arrange | positioned on the curved surface of a stage. Therefore, the first and second plate materials can be reliably held during welding.

  Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same or corresponding components are denoted by the same reference numerals, and the same description is not repeated. For convenience of explanation, in each drawing, the configuration may be simplified or schematically illustrated, or a part of the configuration may be omitted.

[Configuration of welding equipment]
FIG.1 and FIG.2 is the perspective view and front view which respectively show schematic structure of the welding apparatus 10 which concerns on embodiment. As shown in FIGS. 1 and 2, the welding apparatus 10 includes a stage 1, a welding torch 2, a fixing member 3, and coolers 4 </ b> A and 4 </ b> B. The welding apparatus 10 welds plate materials M1 and M2 each having a curved shape. The plate materials M1 and M2 are metal plates that can be welded by the welding torch 2.

  As shown in FIG. 1, the stage 1 includes a curved surface 11. On the curved surface 11, the plate materials M <b> 1 and M <b> 2 are arranged in a state where the end surfaces are butted together. The plate members M1 and M2 are placed on the curved surface 11 with the surfaces to be cooled S1 and S2 facing upward.

  The curved surface 11 is formed in a shape capable of holding the curved plate materials M1 and M2. For example, the curved surface 11 has a curvature substantially equal to the curvatures of the plate materials M1 and M2. The stage 1 is preferably made of metal or the like from the viewpoint of removing heat from the plate materials M1 and M2 being welded.

  As the welding torch 2, a known welding machine can be used. The welding torch 2 is, for example, a laser welder. As shown in FIG. 2, the welding torch 2 is disposed between the cooler 4A and the cooler 4B. The welding torch 2 is disposed above the stage 1.

  The welding torch 2 is movably attached to the fixed member 3 via a fixture 5. The fixing member 3 is fixed to a building or the like where the welding apparatus 10 is installed. At the time of welding, the welding torch 2 moves horizontally along with the fixture 5 along the abutted end surfaces of the plate materials M1 and M2 on the stage 1. Hereinafter, the direction in which the welding torch 2 moves is referred to as a welding direction X. The welding direction X is a direction in which the welding of the plate materials M1 and M2 proceeds, but is a horizontal direction that does not include a vertical component.

  As shown in FIG. 2, the coolers 4 </ b> A and 4 </ b> B are arranged above the stage 1. The cooling machine 4A is disposed above the plate material M1 on the stage 1. The cooler 4B is disposed above the plate material M2 on the stage 1. The coolers 4 </ b> A and 4 </ b> B are attached to the fixed member 3. At the time of welding, the coolers 4A and 4B cool the plate members M1 and M2, respectively.

  The coolers 4A and 4B have the same configuration. In the present embodiment, when the coolers 4A and 4B are not distinguished, the cooler 4A and / or the cooler 4B is referred to as a cooler 4. When the plate materials M1 and M2 are not distinguished, the plate material M1 and / or the plate material M2, the cooled surface S1 and / or the cooled surface S2 are referred to as the plate material M and the cooled surface S, respectively. Hereinafter, the configuration of the cooler 4 will be described.

  3 and 4 are a perspective view and a side view showing a part of the cooler 4, respectively. As shown in FIGS. 3 and 4, the cooler 4 includes a plurality of cooling bodies 41, a plurality of elastic bodies 42, and a plurality of support bodies 43.

  The cooling body 41 contacts the plate material M and cools the plate material M. The cooling body 41 is preferably made of a material having high thermal conductivity. As a material of the cooling body 41, steel etc. can be mentioned, for example, Copper and aluminum can be mentioned as a preferable material.

  The plurality of cooling bodies 41 are arranged side by side in the welding direction X. The cooling body 41 is formed in a frame shape. The frame shape means a shape having a through hole penetrating in the welding direction X. In the present embodiment, the cooling body 41 has a rectangular tube shape.

  The number and dimensions of the cooling bodies 41 may be appropriately determined according to the curvature of the plate material M and / or the size of the region to be cooled of the plate material M. The cooling target area is an area of the plate material M that requires cooling during welding. The region to be cooled extends along the welding direction X in the vicinity of the welded portion in the plate M. For example, assuming that the length of the region to be cooled in the welding direction X is the same as the length of the welded portion extending along the welding direction X, the length for pressing the cooling body 41 in the welding direction X is the length of the welded portion. You may do it above. That is, in the welding direction X, the plurality of cooling bodies 41 may be arranged by the same length as the length of the cooling target area, or the plurality of cooling bodies 41 are arranged beyond the length of the cooling target area. Also good. The plurality of cooling bodies 41 are preferably arranged so as to be in uniform contact with the surface of the cooling target area.

  For example, the plurality of cooling bodies 41 are arranged in the welding direction X with a constant interval d. The interval d is an interval when each cooling body 41 is in an upright state. When the thickness of the cooling body 41 is D, the thermal conductivity of the cooling body 41 is H, and the thermal conductivity of the plate member M is h, the interval d is preferably D × 2 h / H or less. The wall thickness D of the cooling body 41 is the wall thickness of the cooling body 41 at the position in contact with the plate material M, that is, the length in the vertical direction from the outer wall surface to the inner wall surface on the plate material M side of the cooling body 41. The unit of the interval d, the wall thickness D, and the thermal conductivities H and h is arbitrary. However, the unit of the distance d is equal to the unit of the thickness D, and the unit of the thermal conductivity H is equal to the thermal conductivity h. The thickness D is the vertical dimension of the part on the plate member M side in the frame-shaped cooling body 41.

  If the distance d between the cooling bodies 41 is not more than D × 2 h / H, it is considered that the heat flux from the plate material M to the cooling body 41 is not more than the heat flux in the cooling body 41. Therefore, the cooling capacity of the plate material M by the cooling body 41 can be sufficiently obtained. The heat flux in the cooling body 41 is a heat flux from the interface between the cooling body 41 and the plate material M to the refrigerant passage P described later.

  Elastic bodies 42 are respectively disposed between the plurality of cooling bodies 41. Each elastic body 42 connects two adjacent cooling bodies 41. The elastic modulus (longitudinal elastic modulus) of the elastic body 42 is smaller than the elastic modulus of the cooling body 41. The elastic body 42 preferably has at least heat resistance so as not to be deformed by heat during welding. The elastic body 42 can be made of a known material such as heat resistant rubber.

  The elastic body 42 is formed in a frame shape. That is, the elastic body 42 has a through hole penetrating in the welding direction X. However, the elastic body 42 is smaller than the cooling body 41. The elastic body 42 does not contact the plate material M during welding. By connecting the through hole of the elastic body 42 and the through hole of the cooling body 41, a refrigerant passage P extending in the welding direction X is formed in the cooling body 41 and the elastic body 42. The refrigerant passage P is a passage for allowing the refrigerant to pass during welding. The refrigerant passage P has openings at both ends in the welding direction X.

  The shapes of the cooling body 41 and the elastic body 42 are not particularly limited. The cooling body 41 only needs to have a flat surface for contacting the plate material M. The elastic body 42 should just be a shape which can connect the cooling bodies 41 mutually. In each of the cooling body 41 and the elastic body 42, the through hole can have a shape similar to the outer peripheral surface or a non-similar shape. The shape of the through hole of the cooling body 41 may be the same as or different from the shape of the through hole of the elastic body 42.

  The elastic body 42 is fixed to each of the adjacent cooling bodies 41. The elastic body 42 is fixed to the cooling body 41 so that the refrigerant does not leak from between the cooling body 41 and the elastic body 42. The method for fixing the cooling body 41 and the elastic body 42 is not particularly limited. For example, the cooling body 41 and the elastic body 42 may be bonded using an adhesive, or a groove is provided around the through hole in the cooling body 41, and the end of the elastic body 42 is inserted into the groove to form the groove. The cooling body 41 and the elastic body 42 may be fixed by caulking the edges.

  The plurality of support bodies 43 are provided corresponding to the plurality of cooling bodies 41. Each of the support bodies 43 has an upper end attached to the fixing member 3. Each of the support bodies 43 supports the cooling body 41 at a corresponding position at the lower end thereof. The support body 43 has a configuration in which the corresponding cooling body 41 is inclined with respect to the horizontal plane. Each support body 43 presses the corresponding cooling body 41 against the surface S to be cooled of the plate material M.

  FIG. 5 is a perspective view showing the configuration of the support 43. As shown in FIG. 5, the support body 43 includes movable parts 431 and 432 and a pressing part 433. The movable parts 431 and 432 have a configuration for allowing the cooling body 41 to tilt. The pressing part 433 has a configuration for pressing the cooling body 41 downward.

  The movable part 431 is disposed above the pressing part 433. The movable part 431 includes an upper link member 431a and a lower link member 431b.

  The upper end of the upper link member 431a is fixed to the fixing member 3 shown in FIGS. The upper link member 431a supports the lower link member 431b so as to be rotatable around the axis A1 at the lower end thereof. The axis A1 is a horizontal axis orthogonal to the welding direction X. The cooling body 41 is connected to the lower link member 431b via the movable portion 432 and the pressing portion 433. For this reason, the cooling body 41 can rotate around the axis A1 together with the lower link member 431b.

  The movable part 432 is disposed below the pressing part 433. The movable part 432 includes an upper link member 432a and a lower link member 432b.

  The upper end of the upper link member 432a is attached to the pressing portion 433. The upper link member 432a supports the lower link member 432b at its lower end so as to be rotatable around the axis A2. The axis A2 is a horizontal axis orthogonal to the welding direction X. The cooling body 41 is connected to the lower end of the lower link member 432b. For this reason, the cooling body 41 can rotate around the axis A2 together with the lower link member 432b.

  The upper link members 431a and 432a can be connected to the lower link members 431b and 432b, respectively, using a known joint mechanism. As a known joint mechanism, for example, there is a so-called single joint in which two members are connected to each other so as to be relatively rotatable around a single axis by a pivot pin. Each of the upper link members 431a and 432a may be connected to the lower link members 431b and 432b using a ball joint, a universal joint, or the like that relatively rotates the two members around multiple axes.

  The pressing part 433 includes a cylinder 433a and a compression spring 433b. The cylinder 433a is a hollow member having openings on the upper surface and the lower surface. A movable portion 431 is inserted into the opening on the upper surface of the cylinder 433a. The movable part 432 is inserted into the opening on the lower surface of the cylinder 433a. At least one of the movable parts 431 and 432 is inserted into the cylinder 433a so as to be capable of relative movement in the vertical direction with respect to the cylinder 433a.

  A compression spring 433b is accommodated in the cylinder 433a. The compression spring 433b in the present embodiment is a coil spring. However, the compression spring 433b may be an air spring, a leaf spring, or a bamboo shoot spring.

  One end of the compression spring 433b is connected to the lower end of the movable portion 431 in the cylinder 433a. The other end of the compression spring 433b is connected to the upper end of the movable portion 432 in the cylinder 433a. The compression spring 433b presses the cooling body 41 downward by a reaction force when a compression load is applied.

[Operation of welding equipment]
Next, operation | movement of the welding apparatus 10 comprised as mentioned above is demonstrated.

  As shown in FIG. 1, when the plate members M <b> 1 and M <b> 2 are welded by the welding apparatus 10, the plate members M <b> 1 and M <b> 2 are disposed on the curved surface 11 of the stage 1. The plate members M1 and M2 are placed on the curved surface 11 in a state where the surfaces to be cooled S1 and S2 face upward and the end surfaces face each other. The welding torch 2 moves the fixing member 3 in the welding direction X and welds the plate materials M1 and M2.

  At the time of welding, the cooling body 41 of the cooler 4A contacts the surface to be cooled S1 of the plate material M1. The cooling body 41 of the cooling body 4B contacts the surface to be cooled S2 of the plate material M2. Hereinafter, the operation of the cooler 4 will be described with reference to FIGS. 6 and 7. 6 and 7 are a perspective view and a side view, respectively, showing the operation of the cooler 4 during welding.

  As shown in FIG. 6, the compression spring 433 b of the support body 43 is compressed between the fixing member 3 and the plate material M at the time of welding. The cooling body 41 is pressed against the surface S to be cooled of the plate M by the reaction force of the compression spring 433b. When the cooling body 41 is pressed against the surface S to be cooled, the cooling body 41 is inclined according to the shape of the pressed portion.

  As shown in FIG. 7, the plate member M is formed in a bow shape upward in a side view. The plate material M has a gradient along the welding direction X. In the to-be-cooled surface S of the plate M, the inclination (tangential angle) with respect to the horizontal plane is small at the central portion in the welding direction X and large at both end portions. For this reason, the inclination of the cooling body 41 pressed against the surface S to be cooled is smaller on the center side in the welding direction X and larger on each end side.

  Thus, the cooling body 41 is inclined along the surface S to be cooled of the plate material M. Therefore, all the cooling bodies 41 press the surface to be cooled S with almost the entire lower surface. The plate M being welded is cooled by heat conduction from the pressed plate M to the cooling body 41.

  When the intervals between the cooling bodies 41 increase as the cooling bodies 41 tilt, the elastic bodies 42 extend between the cooling bodies 41. In order to suppress the exposure of the elastic body 42, the cooling bodies 41 positioned at both ends in the welding direction X may be pressed from the outside in the welding direction X toward the center during welding.

  At the time of welding, the refrigerant can be supplied to the refrigerant passage P. The refrigerant is supplied from one opening of the refrigerant passage P and discharged from the other opening. For example, water can be used as the refrigerant.

[effect]
In the cooler 4 according to the present embodiment, when the plate material M is welded, the plurality of cooling bodies 41 are inclined according to the shape of the cooled surface S of the plate material M and follow the cooled surface S. For this reason, all the cooling bodies 41 press the plate material M with substantially the same pressing force. Thereby, the cooling object area | region of the board | plate material M is cooled uniformly, and the thermal deformation of the board | plate material M can be suppressed.

  The cooler 4 has a refrigerant passage P configured by a cooling body 41 and an elastic body 42. By supplying the refrigerant to the refrigerant passage P at the time of welding, the temperature rise of the cooling body 41 can be suppressed. Therefore, the heat removal effect from the board | plate material M by the cooling body 41 can be improved, and the thermal deformation of the board | plate material M can be suppressed more reliably.

  In the cooler 4, the support body 43 supports the cooling body 41 so as to be rotatable around axes A <b> 1 and A <b> 2 orthogonal to the welding direction X. For this reason, the cooling body 41 can be easily tilted in the welding direction X or the opposite direction. Therefore, the lower surface of the cooling body 41 can be made to follow the gradient in the welding direction X on the cooled surface S of the plate material M.

  A welding apparatus 10 according to this embodiment includes a stage 1 including a curved surface 11. For this reason, the plate M having a curved shape can be reliably held during welding.

[Modification]
Although the embodiments have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

  In the said embodiment, the board | plate material which has a curved shape is welded. However, since the cooler and the welding apparatus according to the present disclosure cause a plurality of cooling bodies to follow the plate material, the cooler and the welding device may be used for welding a flat plate material or a plate material having a more complicated bending shape. it can.

  The welding apparatus according to the embodiment includes a stage including a curved surface. However, the welding apparatus only needs to be able to hold the plate material to be welded, and may not include such a stage. The holding method of a board | plate material can be determined according to the shape etc. of a board | plate material.

  In the above embodiment, the welding torch and the two coolers are attached to a common fixing member. However, the two coolers may be attached to separate fixing members. Further, at least one of the coolers may be attached to a fixing member different from the welding torch.

  In the said embodiment, the cooling body and the elastic body are formed in frame shape. However, at least one of the cooling body and the elastic body may be a solid shape having no through hole. Further, the elastic body may not be disposed between the cooling bodies. In such a configuration, the coolant passage is not formed in the cooler, but the plate material can be cooled by heat conduction from the plate material to the cooling body.

  In the above embodiment, the cooling body rotates around two horizontal axes orthogonal to the welding direction. However, the number of rotation axes of the cooling body may be one. That is, in the cooler according to the above embodiment, one of the two movable parts provided in the support may be excluded.

  The rotation axis of the cooling body may not be a horizontal axis orthogonal to the welding direction. The direction of the rotation axis can be determined according to the shape of the plate to be welded. If the cooling body can be inclined with respect to the horizontal plane, the cooling body does not have to be rotated around a predetermined rotation axis.

  In the said embodiment, a support body presses a cooling body using a compression spring. However, the pressing method of the cooling body is not limited to this. For example, the cooling body can be pressed using hydraulic pressure or the like.

10: Welding device 1: Stage 11: Curved surface 2: Welding torch 4, 4A, 4B: Cooling machine 41: Cooling body 42: Elastic body 43: Support body P: Refrigerant passage M, M1, M2: Plate materials S, S1, S2: Surface to be cooled

Claims (5)

A cooling machine for cooling the plate material during welding,
A plurality of cooling bodies that are arranged side by side in the welding direction of the plate material and are in contact with the surface to be cooled of the plate material,
A plurality of cooling bodies are provided corresponding to the plurality of cooling bodies, each of which supports the corresponding cooling bodies so as to be inclined with respect to a horizontal plane, and each of the plurality of pressing the corresponding cooling bodies against the surface to be cooled of the plate member A support;
A cooler. The cooler according to claim 1, further comprising:
A plurality of elastic bodies, each disposed between two adjacent cooling bodies among the plurality of cooling bodies, and connecting the two cooling bodies;
With
The plurality of cooling bodies and the plurality of elastic bodies each have a frame shape and constitute a refrigerant passage extending in the welding direction. The cooler according to claim 1 or 2,
Each of the supports is a cooler that supports the corresponding cooling body so as to be rotatable about a horizontal axis orthogonal to the welding direction. A welding apparatus for welding a first plate member and a second plate member,
A first cooler according to any one of claims 1 to 3, wherein the first cooler cools the first plate during welding,
A second cooler according to any one of claims 1 to 3, wherein the second cooler cools the second plate during welding,
A welding torch disposed between the first cooler and the second cooler;
A welding apparatus comprising: The welding device according to claim 4,
Each of the first and second plate members has a curved shape,
The welding apparatus further includes a stage including a curved surface for arranging the first and second plate members.

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