JP6613868B2

JP6613868B2 - Cooling machine and welding equipment

Info

Publication number: JP6613868B2
Application number: JP2015246188A
Authority: JP
Inventors: 岳行齋藤; 学福本; 正裕小川
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2015-04-10
Filing date: 2015-12-17
Publication date: 2019-12-04
Anticipated expiration: 2035-12-17
Also published as: JP2016198822A

Description

本発明は、冷却機及び冷却機を備える溶接装置に関し、さらに詳しくは、互いに異なる厚さを有する板材を溶接するときにこれらの板材を冷却するための冷却機及びこれら板材を溶接するための溶接装置に関する。 The present invention relates to a cooler and a welding apparatus including the cooler, and more specifically, a cooler for cooling these plate members when welding plate members having different thicknesses, and a weld for welding these plate members. Relates to the device.

板材を溶接する際には、溶接に伴う熱ひずみで板材の溶接箇所の周辺部に溶接変形を生じることがある。溶接変形は、見栄えを低下させると共に、製品性能に影響する。そのため、溶接変形を生じた場合には、溶接後にプレス機などで変形部分を矯正して、形状を修正することがある。しかしながら、矯正を行うと、製造時の手間が増加する。そのため、溶接時に溶接変形を抑制する取り組みがなされている。この取り組みとして、上記周辺部を強制的に冷却して、溶接に伴う温度勾配を低減させて溶接変形を抑制させる方法がある。 When welding a plate material, welding deformation may occur in the peripheral portion of the welded portion of the plate material due to thermal strain accompanying welding. Welding deformation reduces appearance and affects product performance. For this reason, when welding deformation occurs, the shape may be corrected by correcting the deformed portion with a press machine or the like after welding. However, if correction is performed, labor during manufacturing increases. Therefore, efforts have been made to suppress welding deformation during welding. As this approach, there is a method in which the peripheral portion is forcibly cooled to reduce a temperature gradient accompanying welding and suppress welding deformation.

この方法として、特開２００２−１５３９８８号公報には、下面の開口している冷却ボックスを備える冷却装置が開示されている。この冷却装置は、冷却水を冷却ボックス内側に供給して板材に吹き付けることで、溶接変形を抑制している。そして、この冷却装置は、冷却ボックスの下面の縁に沿って、冷却ボックス内に供給された冷却水が溶接トーチ側へ流出しないよう仕切り材が取り付けられており、仕切り材は冷却ボックスを介してアームのスプリングによって一定の押し付け量で板材に圧接されている。 As this method, Japanese Patent Application Laid-Open No. 2002-153988 discloses a cooling device including a cooling box having an open bottom surface. This cooling device suppresses welding deformation by supplying cooling water to the inside of the cooling box and spraying it on the plate material. In this cooling device, a partition material is attached along the edge of the lower surface of the cooling box so that the cooling water supplied into the cooling box does not flow out to the welding torch side, and the partition material passes through the cooling box. It is pressed against the plate with a certain amount of pressing by the spring of the arm.

また、特開２００１−７１１２９号公報には、板材の突合せ溶接部の近傍に沿って、溶接部の左右に殻体を仮設密着させる溶接変形防止冶具が開示されている。この溶接変形防止冶具は、殻体の内部に冷媒を流通させて、殻体に沿って冷却ラインを形成し、溶接時に発生する熱が冷却ラインより左右外側に伝達されることを阻止している。そして、この溶接変形防止冶具は、重錘のごとき殻体押圧手段で殻体の底板の下面を板材の表面に密接させている。 Japanese Patent Application Laid-Open No. 2001-71129 discloses a welding deformation prevention jig that temporarily attaches a shell body to the left and right of a welded portion along the vicinity of a butt welded portion of a plate material. This welding deformation prevention jig circulates a coolant through the inside of the shell, forms a cooling line along the shell, and prevents heat generated during welding from being transferred to the left and right outside of the cooling line. . In this welding deformation prevention jig, the lower surface of the bottom plate of the shell is brought into close contact with the surface of the plate by shell pressing means such as a weight.

特開２００２−１５３９８８号公報JP 2002-153988 A 特開２００１−７１１２９号公報JP 2001-71129 A

特開２００２−１５３９８８号公報の冷却装置は、単一の冷却ボックスで溶接ビート及び左右両板材の溶接ビートの周辺部の上方を纏めて覆っている。そのため、この冷却装置は、左右で厚さの異なる板材などを溶接する際に、仕切り材による冷却水の流出を防止させることができない。 The cooling device disclosed in Japanese Patent Application Laid-Open No. 2002-153988 covers the upper portion of the peripheral portion of the welding beat and the welding beat of the left and right plate members together with a single cooling box. Therefore, this cooling device cannot prevent the cooling water from flowing out of the partition material when welding plate materials having different thicknesses on the left and right.

特開２００１−７１１２９号公報の溶接変形防止冶具は、板材を溶接する場合、その都度、殻体と板材との接触を確保するため、板材毎に重錘を配置する手間が必要となる。そして、これらの文献のいずれにも、厚さの異なる板材を溶接することに関する開示は無い。 In the welding deformation prevention jig disclosed in Japanese Patent Laid-Open No. 2001-71129, when a plate material is welded, in order to ensure contact between the shell and the plate material, it is necessary to arrange a weight for each plate material. And neither of these documents discloses disclosure relating to welding plate materials having different thicknesses.

本発明の目的は、板材に対する冷却体の位置決めを容易に行える冷却機及び溶接装置を提供することである。 The objective of this invention is providing the cooler and welding apparatus which can position the cooling body easily with respect to a board | plate material.

本発明の一実施形態による冷却機は、第１板材と第１板材よりも厚い第２板材とを溶接するときに第１及び第２板材を冷却する。第１板材と第２板材とをそれらの側面を互いに接触させて配置するためのステージと、第１板材の上面に接触される第１冷却体と、第２板材の上面に接触される第２冷却体と、第１冷却体を第１板材に押し付ける１又は２以上の第１押圧部と、第２冷却体を第２板材に押し付ける１又は２以上の第２押圧部と、第１及び第２押圧部を共通に支持する共通支持部とを備える。 The cooler according to one embodiment of the present invention cools the first and second plate members when welding the first plate member and the second plate member that is thicker than the first plate member. A stage for arranging the first plate member and the second plate member with their side surfaces in contact with each other, a first cooling body in contact with the upper surface of the first plate member, and a second in contact with the upper surface of the second plate member A cooling body, one or more first pressing portions that press the first cooling body against the first plate member, one or more second pressing portions that press the second cooling body against the second plate member, the first and first And a common support portion that supports the two pressing portions in common.

本発明の一実施形態による溶接装置は、上記冷却機と、溶接トーチとを備える。 The welding apparatus by one Embodiment of this invention is equipped with the said cooler and the welding torch.

本発明によれば、板材に対する冷却体の位置決めを容易に行うことができる。 According to the present invention, it is possible to easily position the cooling body with respect to the plate material.

図１は、接触面押し付け圧力と接触熱抵抗との関係を示すグラフである。FIG. 1 is a graph showing the relationship between contact surface pressing pressure and contact thermal resistance. 図２は、本発明の一実施形態による溶接装置の外観構成を示す斜視図である。FIG. 2 is a perspective view showing an external configuration of a welding apparatus according to an embodiment of the present invention. 図３は、図２に示した溶接装置を別の角度から見た斜視図である。FIG. 3 is a perspective view of the welding apparatus shown in FIG. 2 viewed from another angle. 図４は、図２及び図３中の圧縮ばねの内部構造を示す部分破断正面図である。FIG. 4 is a partially broken front view showing the internal structure of the compression spring in FIGS. 2 and 3. 図５は、本発明の一実施形態による他の冷却機の外観構成を示す斜視図である。FIG. 5 is a perspective view showing an external configuration of another cooler according to an embodiment of the present invention. 図６は、図５に示した冷却機の流体圧付与部の模式図である。FIG. 6 is a schematic diagram of a fluid pressure imparting section of the cooler shown in FIG.

本発明者らは、上記課題を解決するため、溶接時における冷却体での板材の安定した冷却を目的に、種々の検討を行い、以下の知見を得た。 In order to solve the above problems, the present inventors have made various studies for the purpose of stable cooling of the plate material with the cooling body during welding, and have obtained the following knowledge.

接触面押し付け圧力（押圧力）と接触熱抵抗との関係は、図１に示すように、押圧力が増加すると接触熱抵抗は減少するが、押圧力が所定値以上になると接触熱抵抗は飽和する（参考文献１：佐野川好母、「接触熱抵抗」、日本機械学会誌（１９６１）、ｐｐ２４７、図１７の○印のプロットを引用）。具体的には、Ａｌ−Ｆｅの押圧力と接触熱抵抗との関係において、押圧力が７．４×１０^６［Ｎ／ｍ^２］以上になると、接触熱抵抗が安定してほぼ横這いに推移する。なお、接触熱抵抗は、Ａｌ−Ｆｅに限らず、例えば、Ｆｅ−Ｆｅなどであっても、押圧力が所定値以上になると、飽和する（例えば参考文献１のｐｐ２４７、図１８など参照）。 As shown in FIG. 1, the contact surface pressing pressure (pressing force) and the contact thermal resistance decrease as the pressing force increases, but the contact thermal resistance is saturated when the pressing force exceeds a predetermined value. (Reference 1: Yoshinobu Sanokawa, “Contact Thermal Resistance”, Journal of the Japan Society of Mechanical Engineers (1961), pp247, quoted with a circle in FIG. 17). Specifically, in the relationship between the pressing force of Al—Fe and the contact thermal resistance, when the pressing force is 7.4 × 10 ⁶ [N / m ² ] or more, the contact thermal resistance is stable and almost flat. To do. Note that the contact thermal resistance is not limited to Al—Fe, and, for example, even Fe—Fe, etc., is saturated when the pressing force exceeds a predetermined value (see, for example, pp 247 in Reference 1 and FIG. 18).

本発明者らは、上記の知見に基づいて本発明を完成させた。以下、本発明の一実施形態による冷却機を備える溶接装置について詳細に説明する。 The present inventors have completed the present invention based on the above findings. Hereinafter, a welding apparatus including a cooler according to an embodiment of the present invention will be described in detail.

この冷却機は、板材各々に対応する冷却体の位置決めを容易に行うことができる。 This cooler can easily position the cooling body corresponding to each plate material.

好ましくは、第１押圧部は第１圧縮ばねを含み、第２押圧部は第２圧縮ばねを含む。第１及び第２圧縮ばねは、次の式（１）を満たしかつ式（２）で定義される単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］を有する。式（１）中、Ｐ［Ｎ／ｍ^２］は第１及び第２冷却体と第１及び第２板材との間の接触熱抵抗が飽和するときの押圧力である。ｔ_Ａ［ｍ］は第２板材の厚さであり、式（２）中、ｎ［個］は第１及び第２圧縮ばね各々の数であり、ｋ_ｉは圧縮ばね各々のばね定数であり、Ｓ［ｍ^２］は圧縮ばねにより押し付けられる冷却体が板材に接触する面積である。

Preferably, the first pressing portion includes a first compression spring, and the second pressing portion includes a second compression spring. The first and second compression springs have a spring constant k [N / m / m ² ] per unit area that satisfies the following formula (1) and is defined by formula (2). In formula (1), P [N / m ² ] is a pressing force when the contact thermal resistance between the first and second cooling bodies and the first and second plate members is saturated. t _A [m] is the thickness of the second plate member, n in Equation (2) is the number of each of the first and second compression springs, and k _i is the spring constant of each of the compression springs. , S [m ² ] is an area where the cooling body pressed by the compression spring contacts the plate material.

この冷却機では、第１圧縮ばねが第１板材の厚さ分だけ縮み、第２圧縮ばねが第２板材の厚さ分だけ縮む。第１板材が第２板材よりも薄い場合、第１圧縮ばねが第１冷却体を第１板材に押し付ける押圧力は、第２圧縮ばねが第２冷却体を第２板材に押し付ける押圧力よりも小さくなる。しかしながら、第１及び第２圧縮ばねの単位面積あたりのばね定数ｋはＰ／ｔ_Ａ以上であるため、第１冷却体と第１板材との間の接触熱抵抗と第２冷却体と第２板材との間の接触熱抵抗とはほぼ同じになり、第１板材から第１冷却体への抜熱量と第２板材から第２冷却体への抜熱量ともほぼ同じになる。その結果、第１及び第２板材に生じる溶接変形が抑えられる。 In this cooler, the first compression spring shrinks by the thickness of the first plate material, and the second compression spring shrinks by the thickness of the second plate material. When the first plate member is thinner than the second plate member, the pressing force by which the first compression spring presses the first cooling body against the first plate member is greater than the pressing force by which the second compression spring presses the second cooling member against the second plate member. Get smaller. However, since the spring constant k per unit area of the first and second compression springs is equal to or greater than P / t _A , the contact thermal resistance between the first cooling body and the first plate member, the second cooling body, and the second cooling spring. The contact heat resistance with the plate material is substantially the same, and the heat removal amount from the first plate member to the first cooling body and the heat removal amount from the second plate member to the second cooling body are substantially the same. As a result, welding deformation that occurs in the first and second plate members is suppressed.

好ましくは、第１及び第２圧縮ばねは、次の式（３）を満たす単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］を有し、式（３）中、ρ［Ｎ／ｍ^２］は第２板材の降伏応力であり、ｔ_Ｂ［ｍ］は第２板材の厚さである。

Preferably, the first and second compression springs have a spring constant k [N / m / m ² ] per unit area that satisfies the following formula (3), and in the formula (3), ρ [N / m ² ] is the yield stress of the second plate, and t _B [m] is the thickness of the second plate.

この場合、第１及び第２板材にかかる押圧力のむらが抑制され、第１及び第２板材からの抜熱量のむらも抑制される。その結果、第１及び第２板材は均一に冷却される。 In this case, unevenness of the pressing force applied to the first and second plate members is suppressed, and unevenness of the heat removal amount from the first and second plate members is also suppressed. As a result, the first and second plate members are uniformly cooled.

好ましくは、第１押圧部の個数は２個以上であり、第１冷却体上に直線上にかつ対称に配置される。第２押圧部の個数は２個以上であり、第２冷却体上に直線上にかつ対称に配置される。 Preferably, the number of the first pressing portions is two or more, and the first pressing portions are arranged linearly and symmetrically on the first cooling body. The number of the second pressing portions is two or more, and is arranged linearly and symmetrically on the second cooling body.

好ましくは、共通支持部は、第１及び第２押圧部を同じ圧力で押す流体で満たされた密閉容器を含み、第１及び第２押圧部はシリンダーを含む。 Preferably, the common support part includes an airtight container filled with a fluid that presses the first and second pressing parts with the same pressure, and the first and second pressing parts include a cylinder.

この場合、第１及び第２押圧部各々により第１及び第２冷却体が同じ押圧力で第１及び第２板材に接触する。その結果、第１及び第２板材は均一に冷却される。 In this case, the first and second pressing parts respectively contact the first and second plate members with the same pressing force by the first and second pressing portions. As a result, the first and second plate members are uniformly cooled.

溶接装置は、上記冷却機と、ステージの上方に配置される溶接トーチとを備える。 The welding apparatus includes the cooling machine and a welding torch disposed above the stage.

本実施形態による溶接装置は、図２及び図３に示すように、冷却体１と、冷却体２と、複数の支持体７と、複数の支持体８と、溶接トーチ１０と、取付具１１と、梁９と、ステージ５とを備える。溶接装置は、板材２１とこれよりも厚い板材２２とを溶接することができる。換言すると、溶接装置は、冷却機と、溶接トーチ１０と、取付具１１とを備える。冷却機は、冷却体１と、冷却体２と、複数の押圧部１８と、複数の押圧部１９と、梁９と、ステージ５とを備える。 As shown in FIGS. 2 and 3, the welding apparatus according to the present embodiment includes a cooling body 1, a cooling body 2, a plurality of supports 7, a plurality of supports 8, a welding torch 10, and a fixture 11. And a beam 9 and a stage 5. The welding apparatus can weld the plate material 21 and the plate material 22 thicker than this. In other words, the welding apparatus includes a cooler, a welding torch 10, and a fixture 11. The cooler includes a cooling body 1, a cooling body 2, a plurality of pressing portions 18, a plurality of pressing portions 19, a beam 9, and a stage 5.

次の表１は、板材２１と板材２２の組み合わせと、その場合の合成ばね定数ｋ_ｃ（単位面積あたりのばね定数）の例を示す。 Table 1 below shows an example of a combination of the plate material 21 and the plate material 22 and a combined spring constant k _c (spring constant per unit area) in that case.

板材２１，２２は、特に限定されないが、例えば溶接トーチ１０で溶接可能な鋼板である。なお、板材２１，２２の組み合わせは、同種の鋼板の組み合わせに限定されず、例えば熱処理などの加工条件や、成分組成などの異なる、異種の鋼板の組み合わせであってもよい。 Although the board | plate materials 21 and 22 are not specifically limited, For example, it is a steel plate which can be welded with the welding torch 10. FIG. Note that the combination of the plate materials 21 and 22 is not limited to the combination of the same type of steel plates, and may be a combination of different types of steel plates having different processing conditions such as heat treatment and different component compositions.

板材２１，２２は、それらの側面が互いに接触された状態でステージ５上に設置される。ステージ５上には、板材２１，２２が同一平面上に配置される。換言すると、ステージ５は、板材２１の下面と板材２２の下面とを同一平面上に揃えて、各板材２１，２２を下方から支える。ステージ５は、例えば各板材２１，２２を並べて置くための水平面を上部に有する。なお、ステージ５は、ステージ５上部に平面を有するものに限定されず、板材２１の下面と板材２２の下面とを同一平面上に揃えた姿勢で板材２１，２２を下方から支持可能であればよく、例えば搬送ローラーを並べたものであってもよい。 The plate materials 21 and 22 are installed on the stage 5 with their side surfaces in contact with each other. On the stage 5, plate members 21 and 22 are arranged on the same plane. In other words, the stage 5 supports the plate materials 21 and 22 from below by aligning the lower surface of the plate material 21 and the lower surface of the plate material 22 on the same plane. The stage 5 has, for example, a horizontal plane for placing the plate members 21 and 22 side by side at the top. The stage 5 is not limited to the one having a flat surface on the top of the stage 5, as long as the lower surface of the plate material 21 and the lower surface of the plate material 22 are aligned on the same plane and the plate materials 21 and 22 can be supported from below. For example, the conveyance rollers may be arranged side by side.

溶接トーチ１０は、例えばレーザートーチである。溶接トーチ１０は、取付具１１の下部に取り付けられる。溶接トーチ１０は、取付具１１を介して梁９に支持される。梁９は、例えば溶接装置を設置した建物に固定される。また、取付具１１は板材２１，２２の付き合わせた端部（辺）に沿って梁９に対して移動し、これに伴い、溶接トーチ１０も移動する。溶接トーチ１０は、移動時に、板材２１，２２の互いに付き合わせた端部を溶接する。溶接時に溶接トーチ１０の移動する方向が溶接方向であり、平面視において溶接方向に直交する方向が左右である。 The welding torch 10 is, for example, a laser torch. The welding torch 10 is attached to the lower part of the fixture 11. The welding torch 10 is supported by the beam 9 via the fixture 11. The beam 9 is fixed to a building where a welding device is installed, for example. Further, the fixture 11 moves with respect to the beam 9 along the end portions (sides) of the plate members 21 and 22, and the welding torch 10 moves accordingly. The welding torch 10 welds the end portions of the plate members 21 and 22 that are attached to each other when moving. The direction in which the welding torch 10 moves during welding is the welding direction, and the direction orthogonal to the welding direction in plan view is the left and right.

冷却体１の下面は平面であり、冷却体１が板材２１上に配置されることで、冷却体１の下面が板材２１の上面に接触して板材２１が冷却される。冷却体１の材料は、特に限定されないが、熱伝導率の高い材料が好ましい。例えば、鋼材等を用いてもよいし、アルミニウムを含むアルミニウム製であってもよい。 The lower surface of the cooling body 1 is a plane, and the cooling body 1 is disposed on the plate material 21, whereby the lower surface of the cooling body 1 comes into contact with the upper surface of the plate material 21 and the plate material 21 is cooled. Although the material of the cooling body 1 is not specifically limited, A material with high heat conductivity is preferable. For example, steel material etc. may be used and the product made from aluminum containing aluminum may be sufficient.

冷却体１の形状は限定されないが、例えば内部に空間を有する箱状である。冷却体１を投影した形状は、特に限定されないが、例えば図２における奥行き方向である溶接方向に長い平面視長方形状であり、正面視矩形の枠状である。冷却体１の箱内の構造は、空間が設けられてもよく、当該空間に冷媒が流通されていてもよい。冷媒の種類は特に限定されないが、例えば水である。冷媒を流通させる経路は、特に限定されないが、例えば冷却体１の溶接方向における一方の端部から冷却体１内に供給され冷却体１溶接方向における反対側の端部から冷却体１外に排出されることで、冷却体１内を流通させてもよい。なお、板材２１から冷却体１に伝わった熱が冷却体１から放熱されることで板材２１が冷却されるため、冷却体１内に冷媒を流通させなくてもよく、冷却体１の内部に空間を有しなくてもよい。 Although the shape of the cooling body 1 is not limited, For example, it is a box shape which has space inside. Although the shape which projected the cooling body 1 is not specifically limited, For example, it is a planar view rectangular shape long in the welding direction which is the depth direction in FIG. 2, and is a frame shape of a front view rectangle. The structure in the box of the cooling body 1 may be provided with a space, and a refrigerant may be circulated in the space. Although the kind of refrigerant | coolant is not specifically limited, For example, it is water. The path through which the refrigerant flows is not particularly limited. For example, the coolant is supplied from one end in the welding direction of the cooling body 1 into the cooling body 1 and discharged out of the cooling body 1 from the opposite end in the cooling body 1 welding direction. By doing so, the inside of the cooling body 1 may be circulated. Since the heat transferred from the plate 21 to the cooling body 1 is dissipated from the cooling body 1, the plate 21 is cooled. Therefore, it is not necessary to circulate the refrigerant in the cooling body 1. It is not necessary to have a space.

冷却体２は、冷却体１とほぼ構成が同じであるため、重複する説明は省略し、相違点を説明する。冷却体２は板材２２上に配置される。冷却体２は、板材２２上に配置されることで、冷却体２の平坦な下面が板材２２の上面に接触する。冷却体１，２は、図２〜図４に示すように、左右に並び、互いの形状が左右対称形状である。 Since the cooling body 2 has substantially the same configuration as the cooling body 1, the overlapping description will be omitted and the differences will be described. The cooling body 2 is disposed on the plate material 22. The cooling body 2 is disposed on the plate material 22 so that the flat lower surface of the cooling body 2 is in contact with the upper surface of the plate material 22. As shown in FIGS. 2 to 4, the cooling bodies 1 and 2 are arranged side by side, and their shapes are symmetrical to each other.

支持体７は上下に長さを有する。支持体７の下部は、冷却体１の上部に固定される。支持体７の上部は、梁９に固定される。このため、支持体７は、冷却体１を上方から支持する。 The support 7 has a vertical length. The lower part of the support body 7 is fixed to the upper part of the cooling body 1. The upper part of the support 7 is fixed to the beam 9. For this reason, the support body 7 supports the cooling body 1 from upper direction.

支持体７の数や配置は、特に限定されないが、例えば図３及び図４に示すように、支持体７は溶接方向に沿う直線上に３つ配置され、３つの支持体７は等間隔に並ぶ。換言すると、３つの支持体７のうち１つは冷却体１の中央に配置され、残りの２つの支持体７は前後対称に配置される。すなわち、３つの支持体７は、冷却体１上に、直線上にかつ対称に配置される。 The number and arrangement of the supports 7 are not particularly limited. For example, as shown in FIGS. 3 and 4, three supports 7 are arranged on a straight line along the welding direction, and the three supports 7 are equally spaced. line up. In other words, one of the three supports 7 is disposed in the center of the cooling body 1 and the remaining two supports 7 are disposed symmetrically in the front-rear direction. That is, the three supports 7 are arranged on the cooling body 1 in a straight line and symmetrically.

支持体７の各々は、図４に示すように、上部品１４と、下部品１５と、押え板１６とを有する。３つの支持体７は、配置される位置を除き、ほぼ構成が同じであるため、以下、便宜上１つの支持体７を代表にとり説明する。 As shown in FIG. 4, each support body 7 includes an upper part 14, a lower part 15, and a pressing plate 16. Since the three supports 7 have substantially the same configuration except for the position where they are arranged, the following description will be given by taking one support 7 as a representative for convenience.

上部品１４は、梁９に固定される。上部品１４は、特に限定されないが、例えば下方に開口し、中心軸方向が上下に沿う円筒状である。下部品１５は、上部品１４の下方に配置される。下部品１５は、特に限定されないが、例えば中心軸方向が上下に沿う円柱状である。下部品１５は、その上部が上部品１４の筒内に下方から挿入されている。下部品１５は、上部品１４から下方への突出量が可変である。下部品１５は、下端に押え板１６が固定される。押え板１６は、平面視正方形状の平板である。押え板１６は、その下面に冷却体１が固定される。押え板１６は、その押え板１６の上面の面積が下部品１５の下面の面積より大きい。換言すると、支持体１３は、下部品１５の下面に比べて広い面積の下面を有する押え板１６で、冷却体１に固定される。なお、支持体７は、下部品１５の上部品１４からの抜け落ちを防止するストッパーとして、上部品１４と下部品１５とを繋ぐ鎖を更に含むことが好ましい。また、このストッパーは、鎖に限らず、例えば、上部材１４に設けられ上下に長さを有するスリットと、下部材１５に設けられこのスリット内に配置されるピンとを含み、このピンがスリットにピンが引っかかるようにしてもよい。 The upper part 14 is fixed to the beam 9. Although the upper component 14 is not specifically limited, For example, it is a cylindrical shape which opens below and the center axis direction follows up and down. The lower part 15 is disposed below the upper part 14. Although the lower part 15 is not specifically limited, For example, the center-axis direction is the column shape which follows up and down. The upper part of the lower part 15 is inserted into the cylinder of the upper part 14 from below. The lower component 15 has a variable amount of protrusion downward from the upper component 14. The lower part 15 has a presser plate 16 fixed to the lower end. The presser plate 16 is a flat plate having a square shape in plan view. The cooling body 1 is fixed to the lower surface of the pressing plate 16. The pressing plate 16 has an upper surface area larger than that of the lower surface of the lower part 15. In other words, the support body 13 is fixed to the cooling body 1 by the pressing plate 16 having a lower surface having a larger area than the lower surface of the lower part 15. The support 7 preferably further includes a chain connecting the upper part 14 and the lower part 15 as a stopper for preventing the lower part 15 from coming off from the upper part 14. In addition, the stopper is not limited to the chain, and includes, for example, a slit provided in the upper member 14 and having a length in the vertical direction, and a pin provided in the lower member 15 and disposed in the slit. The pin may be caught.

支持体８は、支持体７とほぼ構成が同じであるため、重複する説明は省略し、相違点を説明する。支持体８は冷却体２を上方から支持する。支持体８は、押え板１６が冷却体２に固定される。支持体７，８は、左右対称に配置される。ここで、梁９は、支持体７，８を支持する。そのため、梁９は、支持体７，８を共通に支持する共通支持部１７である。 Since the support body 8 has substantially the same configuration as the support body 7, a redundant description will be omitted and the differences will be described. The support body 8 supports the cooling body 2 from above. In the support 8, the presser plate 16 is fixed to the cooling body 2. The supports 7 and 8 are arranged symmetrically. Here, the beam 9 supports the supports 7 and 8. Therefore, the beam 9 is a common support portion 17 that supports the support bodies 7 and 8 in common.

圧縮ばね３は、特に限定されないが、例えば、コイルばね、空気ばね、板ばね、竹の子ばねから選ばれる１つであることが好ましく、例えばコイルばねである。圧縮ばね３は、１又は２以上設けられる。２以上の圧縮ばね３は、例えば溶接方向に沿う１つの直線上に対称性を有して冷却体１上に配置される。具体的には、例えば、冷却体１の前後寸法の中央を基準に前後で対称となる位置で直線上に並び、配置され、３以上の奇数で圧縮ばね３を有する場合、中央に１つの圧縮ばね３が配置されることが好ましい。なお、２以上の圧縮ばね３は直線上に対称性を有して冷却体１上に配置されればよく、４以上の圧縮ばね３を有する場合、１つの直線上での配置に限らず、溶接方向に沿う平行な２以上の直線上に分かれて各直線上に対称性を有して冷却体１上に配置されてもよい。 Although the compression spring 3 is not specifically limited, For example, it is preferable that it is one selected from a coil spring, an air spring, a leaf | plate spring, and a bamboo shoot spring, for example, it is a coil spring. One or more compression springs 3 are provided. The two or more compression springs 3 are arranged on the cooling body 1 with symmetry on one straight line along the welding direction, for example. Specifically, for example, when the compression body 3 is arranged and arranged on a straight line at positions symmetrical with respect to the front and rear dimensions with respect to the center of the front and rear dimensions of the cooling body 1 and has the compression spring 3 with an odd number of 3 or more, one compression is provided at the center. A spring 3 is preferably arranged. The two or more compression springs 3 may be arranged on the cooling body 1 with symmetry on a straight line. When the four or more compression springs 3 are provided, the arrangement is not limited to one straight line, It may be divided on two or more parallel straight lines along the welding direction and arranged on the cooling body 1 with symmetry on each straight line.

圧縮ばね３は、例えば、支持体７内に配置される。このため、溶接装置は、３つの支持体７と同数の３つの圧縮ばね３を備える。３つの圧縮ばね３は、いずれも構成が同じであるため、便宜上１つの圧縮ばね３を代表にとり説明する。なお、圧縮ばね３は、支持体７内に配置されるものに限定されず、例えば上端を梁９に固定され下端を冷却体１に接触させた状態で設けられるものなど、支持体７を介さずに冷却体１に接触されるものであってもよい。そして、圧縮ばね３は、支持体７を介さない場合、冷却体１を梁９に支持してもよい。また、支持体７内に配置される圧縮ばね３は、上部品１４の筒内天面と下部品１５の上面とに固着されることにより、下部品１５の上部品１４からの抜け落ちを防止するストッパーとしても機能してもよい。 The compression spring 3 is arrange | positioned in the support body 7, for example. For this reason, the welding apparatus includes the same number of three compression springs 3 as the three supports 7. Since all the three compression springs 3 have the same configuration, one compression spring 3 will be described as a representative for convenience. The compression spring 3 is not limited to the one disposed in the support 7, and for example, the compression spring 3 is provided with the upper end fixed to the beam 9 and the lower end in contact with the cooling body 1. Instead, it may be in contact with the cooling body 1. The compression spring 3 may support the cooling body 1 on the beam 9 when the support body 7 is not interposed. Further, the compression spring 3 disposed in the support 7 is fixed to the top surface of the upper part 14 in the cylinder and the upper surface of the lower part 15, thereby preventing the lower part 15 from falling off the upper part 14. It may also function as a stopper.

圧縮ばね３は、押圧部１８に含まれる。押圧部１８は冷却体１を板材２１に押し付ける。具体的には、圧縮ばね３は、例えば、上端を上部品１４の筒内天面に接触させかつ下端を下部品１５の上面に接触させた姿勢で、上部品１４内に配置される。圧縮ばね３は、冷却体１の下方に板材２１が配置されることで、下部品１５を介して上部品１４内で圧縮される。このとき、圧縮ばね３は、圧縮される変位量が板材２１の厚さとほぼ同一となる。換言すると、板材２１の厚さとは、圧縮ばね３が押圧する方向に平行な向きにおける寸法であり、例えば板材２１の上下に沿う寸法である。圧縮ばね３は、圧縮されることで、そのばね定数に応じた押圧力で冷却体１を下方に押圧する。このため、冷却体１は、板材２１との接触時に、上方から弾性的に支持されることとなり、板材２１の上面（接触面）への追従性が向上される。これによって、冷却体１は、材２１が段差や波打ちを有する平坦度の良くない場合であっても、板材２１に安定して接触することができる。 The compression spring 3 is included in the pressing portion 18. The pressing unit 18 presses the cooling body 1 against the plate material 21. Specifically, the compression spring 3 is disposed in the upper part 14 in a posture in which, for example, the upper end is brought into contact with the top surface of the upper part 14 and the lower end is brought into contact with the upper surface of the lower part 15. The compression spring 3 is compressed in the upper part 14 via the lower part 15 by arranging the plate material 21 below the cooling body 1. At this time, the displacement amount of the compression spring 3 is substantially the same as the thickness of the plate 21. In other words, the thickness of the plate material 21 is a dimension in a direction parallel to the direction in which the compression spring 3 presses, for example, a dimension along the top and bottom of the plate material 21. The compression spring 3 is compressed to press the cooling body 1 downward with a pressing force corresponding to the spring constant. For this reason, the cooling body 1 is elastically supported from above at the time of contact with the plate material 21, and the followability to the upper surface (contact surface) of the plate material 21 is improved. As a result, the cooling body 1 can stably come into contact with the plate material 21 even when the material 21 has a level difference or waviness and the flatness is not good.

圧縮ばね３は、所定値以上の押圧力で冷却体１を板材２１に押し付ける。押圧力の前記所定値は、先の知見のとおり、冷却体１と板材２１との接触熱抵抗が飽和するときの押圧力Ｐ［Ｎ／ｍ^２］である。このため、板材２１の厚さをｔ_Ａ［ｍ］とし、接触熱抵抗が飽和するときの押圧力をＰ［Ｎ／ｍ^２］とするとき、圧縮ばね３は、以下の式（１）を満たす単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］を有する。

The compression spring 3 presses the cooling body 1 against the plate member 21 with a pressing force equal to or greater than a predetermined value. The predetermined value of the pressing force is the pressing force P [N / m ² ] when the contact thermal resistance between the cooling body 1 and the plate member 21 is saturated, as described above. For this reason, when the thickness of the plate 21 is t _A [m] and the pressing force when the contact thermal resistance is saturated is P [N / m ² ], the compression spring 3 has the following formula (1): It has a spring constant k [N / m / m ² ] per unit area to be satisfied.

ここで、圧縮ばね３の数をｎ［個］とし、ｎ個の圧縮ばね３のばね定数をそれぞれｋ_１，ｋ_２，・・・ｋ_ｎとし、冷却体１と板材２１との接触面積（冷却体１の下面の面積）をＳ［ｍ^２］とするとき、単位面積あたりのばね定数ｋは、以下の式（２）を満たす。ここで、ｎは自然数であり、圧縮ばね３の個数は１個でも２個以上でもよい。具体的には、例えば３つの圧縮ばね３を有する場合、３つの圧縮ばね３のばね定数をそれぞれｋ_１，ｋ_２，ｋ_３とし、前記接触面積Ｓを１ｍ^２とするとき、単位面積あたりのばね定数ｋは、前記のばね定数ｋ_１，ｋ_２，ｋ_３の和（合成ばね定数）と等しくなる。

Here, the number of the compression spring 3 and n [pieces], _k 1 n pieces of the spring constant of the compression spring 3 _{respectively,} k 2, and · · · _{k n,} the contact area between the cooling body 1 and the plate member 21 ( When the area of the lower surface of the cooling body 1 is S [m ² ], the spring constant k per unit area satisfies the following formula (2). Here, n is a natural number, and the number of compression springs 3 may be one or two or more. Specifically, for example, when three compression springs 3 are provided, the spring constants of the three compression springs 3 are k ₁ , k ₂ , and k ₃ , respectively, and the contact area S is 1 m ² . The spring constant k is equal to the sum (synthetic spring constant) of the spring constants k ₁ , k ₂ , and k ₃ .

また、圧縮ばね３は、単位面積あたりのばね定数ｋに上限を有することが好ましい。この上限は、例えば板材２２の降伏応力の半分の値を用いて設定される。この場合、板材２２の厚さをｔ_Ｂ［ｍ］とし、前記降伏応力をρ［Ｎ／ｍ^２］とするとき、圧縮ばね３の単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］は、以下の式（３）を満たす。なお、板材２１，２２は溶接可能な他の公知の鋼材が適用されるため、単位面積あたりのばね定数ｋの上限は、適宜前記鋼材の降伏応力を式（３）のρに代入すればよい。

Moreover, it is preferable that the compression spring 3 has an upper limit in the spring constant k per unit area. This upper limit is set using, for example, a half value of the yield stress of the plate 22. In this case, when the thickness of the plate 22 is t _B [m] and the yield stress is ρ [N / m ² ], the spring constant k [N / m / m ² ] per unit area of the compression spring 3 Satisfies the following equation (3). In addition, since other well-known steel materials that can be welded are applied to the

plate materials

21 and 22, the upper limit of the spring constant k per unit area may be appropriately substituted for the yield stress of the steel material in ρ in the equation (3). .

圧縮ばね４は、圧縮ばね３とほぼ構成が同じであるため、重複する説明は省略し、相違点を説明する。圧縮ばね４は、例えば、支持体８内に配置される。圧縮ばね４は、冷却体２の下方に板材２２が配置されることで、下部品１５を介して上部品１４内で圧縮される。圧縮ばね４は、押圧部１９に含まれる。押圧部１９は冷却体２を板材２２に押し付ける。圧縮ばね３と圧縮ばね４はそれぞれ個別に存在するため、さらに、圧縮ばね３のばね定数ｋをｋ_Ａ、圧縮ばね３の数をｎ_Ａ個、ｉ個目の圧縮ばね３のばね定数をｋ_Ａ，ｉ、冷却体1が板材２１に接触する面積をS_Ａとすると、式（２）は次の式（４）で示される。圧縮ばね４のばね定数ｋをｋ_Ｂ、圧縮ばね４の数をｎ_Ｂ個、ｊ個目の圧縮ばね４のばね定数をｋ_Ｂ，ｊ、冷却体２が板材２２に接触する面積をS_Ｂとすると、式（２）は次の式（５）で示される。

Since the compression spring 4 has substantially the same configuration as that of the compression spring 3, a redundant description will be omitted and differences will be described. The compression spring 4 is arrange | positioned in the support body 8, for example. The compression spring 4 is compressed in the upper part 14 via the lower part 15 by arranging the plate material 22 below the cooling body 2. The compression spring 4 is included in the pressing portion 19. The pressing portion 19 presses the cooling body 2 against the plate material 22. Since the compression spring 3 and the compression spring 4 exist separately, the spring constant k of the compression spring 3 is k _A , the number of compression springs 3 is n _A , and the spring constant of the i-th compression spring 3 is k _{When A, i} and the area where the cooling body 1 contacts the plate material 21 are S _A , the equation (2) is expressed by the following equation (4). The spring constant k of the compression spring 4 is k _B , the number of the compression springs 4 is n _B , the spring constant of _{the jth} compression spring 4 is k _{B, j} , and the area where the cooling body 2 contacts the plate member 22 is S _B Then, Formula (2) is shown by the following Formula (5).

特に限定されないが、以下、具体的な圧縮ばね３，４の構成を例示する。この場合、例えば、板材２１，２２を熱間圧延軟鋼板とし、冷却体１，２をアルミニウム製とし、板材２１，２２として表１の板組み例の７通りが行われるとする。 Although it does not specifically limit, below, the structure of the concrete compression springs 3 and 4 is illustrated. In this case, for example, it is assumed that the plate materials 21 and 22 are hot-rolled mild steel plates, the cooling bodies 1 and 2 are made of aluminum, and the plate materials 21 and 22 are subjected to seven plate assembly examples shown in Table 1.

先の知見から押圧力Ｐが７．４×１０^６Ｎ／ｍ^２となり、前記降伏応力ρを熱間圧延軟鋼板の降伏応力とするとき、前記降伏応力の半分の値が８７．５×１０^６Ｎ／ｍ^２となる（参考文献２：国重和俊、「自動車用高張力鋼板の最近の進歩と展望」、材料（２００１）、ｐ５２、図９の軟鋼、ひずみ速度４×１０^−３/sのデータを引用）。 From the above knowledge, when the pressing force P is 7.4 × 10 ⁶ N / m ² and the yield stress ρ is the yield stress of the hot rolled mild steel sheet, the half value of the yield stress is 87.5 × 10 6. ⁶ N / m ² (Reference 2: Kazutoshi Kunishige, “Recent Advances and Prospects of High-Strength Steel Sheets for Automobiles”, Material (2001), p52, Mild Steel in FIG. 9, Strain Rate 4 × 10 ⁻³ / quoting s data).

このため、式（１）は以下の式（６）となり、式（３）は以下の式（７）となる。そして、表１より、板材２１の厚さのうち最も薄い厚さｔ_Ａが０．７×１０^−３ｍであり、板材２２の厚さのうち最も厚い厚さｔ_Ｂが３．２×１０^−３ｍであるため、圧縮ばね３及び４の単位面積あたりのばね定数ｋは、式（６），（７）より、下限を１０．６×１０^９Ｎ／ｍ／ｍ^２、上限を２７．３×１０^９Ｎ／ｍ／ｍ^２とされる。

Therefore, Expression (1) becomes the following Expression (6), and Expression (3) becomes the following Expression (7). And from Table 1, the thinnest thickness t _A among the thicknesses of the plate material 21 is 0.7 × 10 ⁻³ m, and the thickest thickness t _B among the thicknesses of the plate material 22 is 3.2 × 10 6. ^-3 m, the spring constant k per unit area of the compression springs 3 and 4 is 10.6 × 10 ⁹ N / m / m ^{2 as} the lower limit and 27 as the upper limit from the equations (6) and (7). 3 × 10 ⁹ N / m / m ² .

ここで、表１では、各冷却体１，２と対応する板材２１，２２との接触面積をいずれも１ｍ^２とするとき、単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］に単位面積として前記接触面積（１ｍ^２）をかけた値を合成ばね定数ｋ_ｃ［Ｎ／ｍ］として表記している。この合成ばね定数ｋ_ｃにおいて、「下限」の値は、式（６）のｔ_Ａに板組み例における板材２１の厚さを代入し、得られる単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］の下限値に前記接触面積をかけた値［Ｎ／ｍ］である。更に、「上限」の値は、式（７）のｔ_Ｂに板組み例における板材２２の厚さを代入し、得られる単位面積あたりのばね定数ｋ［Ｎ／ｍ／ｍ^２］の上限値に前記接触面積（１ｍ^２）をかけた値［Ｎ／ｍ］である。 Here, in Table 1, when the contact areas between the cooling bodies 1 and 2 and the corresponding plate materials 21 and 22 are both 1 m ² , the unit is the spring constant k [N / m / m ² ] per unit area. A value obtained by multiplying the contact area (1 m ² ) as an area is expressed as a composite spring constant k _c [N / m]. In this composite spring constant k _c , the value of “lower limit” is obtained by substituting the thickness of the plate material 21 in the plate assembly example into t _A in the equation (6), and the spring constant k [N / m / It is a value [N / m] obtained by multiplying the lower limit value of m ² ] by the contact area. Furthermore, the value of the “upper limit” is the upper limit value of the spring constant k [N / m / m ² ] per unit area obtained by substituting the thickness of the plate member 22 in the plate assembly example into t _B in the equation (7). It is a value [N / m] which multiplied the contact area (1 m ² ).

表１の板組み例において、溶接装置は、各冷却体１，２の各板材２１，２２との接触面積を１ｍ^２とするとき、各圧縮ばね３，４として、例えば７．０×１０^９Ｎ／ｍのばね定数ｋ_１，ｋ_２，ｋ_３をそれぞれ有する３つのコイルばねを設ければよい。この場合、各圧縮ばね３，４の単位面積あたりのばね定数ｋはそれぞれ、式（２）、式（４）及び式（５）より、２１．０×１０^９Ｎ／ｍ／ｍ^２となり、式（６）及び式（７）を満たすためである。なお、ばね定数ｋ_１，ｋ_２，・・・，ｋ_ｎ及び単位面積あたりのばね定数ｋは、いずれも前記の具体的な数値のみに限定されるものではない。 In the plate assembly example of Table 1, when the contact area between the cooling bodies 1 and 2 and the plate materials 21 and 22 is 1 m ² , the welding device is, for example, 7.0 × 10 ⁹ as the compression springs 3 and 4. Three coil springs having N / m spring constants k ₁ , k ₂ , and k ₃ may be provided. In this case, the spring constant k per unit area of each of the compression springs 3 and 4 is 21.0 × 10 ⁹ N / m / m ² from the equations (2), (4), and (5), respectively. This is because the expressions (6) and (7) are satisfied. Incidentally, the spring constant k per spring constant k _1, k _2, · · ·, k _n, and unit area, not both to be limited to specific values of the.

以上のように、冷却機は、共通支持部３０を用いて支持体７，８を共通に支持することで、板材２１，２２に対する冷却体１，２の位置決めを容易に行うことができる。そのため、冷却機は、板材の厚さが異なっても、例えば冷却体１，２を容易に左右対称で配置できる。 As described above, the cooler can easily position the cooling bodies 1 and 2 with respect to the plate materials 21 and 22 by commonly supporting the supports 7 and 8 using the common support portion 30. Therefore, even if the thickness of a board | plate material differs, the cooler can arrange | position the cooling bodies 1 and 2 with left-right symmetry easily, for example.

冷却機は、圧縮ばね３，４が式（１）を満たすことで、板材２１，２２の配置時に都度圧縮ばね３，４の押圧力を調整する工程などを実施しなくても、所定値Ｐ以上の押圧力で各冷却体１，２と各板材２１，２２と接触させることができる。そのため、冷却機は、良好な接触熱抵抗の状態で板材２１，２２を冷却することができる。その結果、溶接装置は、溶接に伴う入熱による溶接変形の発生を抑制して、板材２１，２２を溶接することができる。更に、冷却体１での抜熱量と冷却体２での抜熱量とをほぼ同一にすることができるため、冷却機は、板材２１，２２間での熱勾配の発生を抑制することができる。その結果、溶接装置は、この熱勾配による溶接変形の発生を抑制して、板材２１，２２を溶接することができる。 Since the compression springs 3 and 4 satisfy the expression (1), the cooler can perform the predetermined value P without performing a step of adjusting the pressing force of the compression springs 3 and 4 each time the plate members 21 and 22 are arranged. The cooling bodies 1 and 2 and the plate members 21 and 22 can be brought into contact with each other with the above pressing force. Therefore, the cooler can cool the plate materials 21 and 22 in a state of good contact heat resistance. As a result, the welding apparatus can weld the plate members 21 and 22 while suppressing the occurrence of welding deformation due to heat input accompanying welding. Furthermore, since the heat removal amount in the cooling body 1 and the heat removal amount in the cooling body 2 can be made substantially the same, the cooler can suppress the occurrence of a thermal gradient between the plate members 21 and 22. As a result, the welding apparatus can weld the plate members 21 and 22 while suppressing the occurrence of welding deformation due to the thermal gradient.

冷却機は、各冷却体１，２と対応する板材２１，２２との接触面の追従性の向上によって、板材２１，２２の少なくとも一方の平坦度が良くない場合であっても、各冷却体１，２と夫々に対応する各板材２１，２２とを安定して接触させることができる。これらのことから、冷却機及び溶接装置は、厚さの異なる鋼板を溶接する場合に加え、例えばテーラードブランク溶接などの平坦度の低い鋼板を溶接する場合にも好適に使用可能である。 Even if the flatness of at least one of the plate members 21 and 22 is not good due to the improvement in the followability of the contact surfaces between the respective cooling members 1 and 2 and the corresponding plate members 21 and 22, 1 and 2 and the plate materials 21 and 22 corresponding to each can be contacted stably. For these reasons, the cooler and the welding apparatus can be suitably used not only when welding steel plates with different thicknesses but also when welding steel plates with low flatness such as tailored blank welding.

冷却機は、圧縮ばね３，４が式（３）を満たすことで、例えば押圧力を調整する工程を省いて冷却体１，２を対応する板材２１，２２に接触させる場合であっても、各冷却体１，２と対応する板材２１，２２との接触箇所での塑性変形や疵の発生を抑制することができる。また、冷却機は、前記冷媒を冷却体１，２内に流通させることで、前記冷媒を介して板材２１，２２からの熱が冷却体１，２外に排出され、冷却時における冷却体１，２への蓄熱を軽減させることができ好ましい。なお、圧縮ばね３，４は、合成ばね定数が異なってもよい。この場合、左右の押圧力を同一にして、左右の接触熱抵抗を同一できる。 Even if the cooling machine 3 and 4 satisfy the formula (3), for example, the step of adjusting the pressing force is omitted and the cooling bodies 1 and 2 are brought into contact with the corresponding plate materials 21 and 22, It is possible to suppress the occurrence of plastic deformation and wrinkles at the contact points between the respective cooling bodies 1 and 2 and the corresponding plate materials 21 and 22. Further, the cooler distributes the refrigerant in the cooling bodies 1 and 2, so that the heat from the plate members 21 and 22 is discharged to the outside of the cooling bodies 1 and 22 through the refrigerant, and the cooling body 1 at the time of cooling. , 2 is preferable because it can reduce the heat storage. The compression springs 3 and 4 may have different composite spring constants. In this case, the left and right pressing forces can be made the same, and the left and right contact thermal resistances can be made the same.

本発明の一実施形態による他の冷却機について詳細に説明する。先に説明した冷却機と重複する説明は省略し、相違点を説明する。 Another cooler according to an embodiment of the present invention will be described in detail. The description which overlaps with the cooler demonstrated previously is abbreviate | omitted, and demonstrates a different point.

共通支持部１７は、図５及び図６に示すように、梁９に設けられ流体で満たされた密閉容器３１と、容器３１内の流体の圧力を調節する調節部３２とを備える。この流体は、特に限定されないが、例えば油である。調節部３２は容器３１に取り付けてある。調節部３２は、例えば、容器３１に繋がるシリンダー３４と、シリンダー３４内を移動するピストン３５と、ピストン３５を動かすための動力源３６とを備える。調節部３２は、動力源３６がピストン３５を動かすことで、容器３１内の流体圧を調節する。 As shown in FIGS. 5 and 6, the common support portion 17 includes a sealed container 31 provided on the beam 9 and filled with a fluid, and an adjustment unit 32 that adjusts the pressure of the fluid in the container 31. Although this fluid is not specifically limited, For example, it is oil. The adjustment unit 32 is attached to the container 31. The adjustment unit 32 includes, for example, a cylinder 34 connected to the container 31, a piston 35 that moves in the cylinder 34, and a power source 36 for moving the piston 35. The adjustment unit 32 adjusts the fluid pressure in the container 31 by the power source 36 moving the piston 35.

容器３１は、その内部が支持体７，８各々の上部材１４内に繋がり、上部材１４各々は内部が流体で満たされる。支持体７，８各々は、下部材１５の上面が同一の面積である。そのため、支持体７，８各々の下部材１５は、容器３１及び上部材１４の流体により同じ圧力で押される。換言すると、押圧部１８，１９各々は下部材１５であり、共通支持部１７は、上部材１４をシリンダーに用いて、下部材１５をピストンに用いる。その結果、冷却体１，２各々は、同じ圧力が付与される。さらに、支持体７の下部材１５は冷却体１を板材２１に押し付け、支持体８の下部材１５は冷却体２を板材２２に押し付ける。 The container 31 is connected to the inside of the upper member 14 of each of the supports 7 and 8, and each of the upper members 14 is filled with a fluid. In each of the supports 7 and 8, the upper surface of the lower member 15 has the same area. Therefore, the lower member 15 of each of the supports 7 and 8 is pressed with the same pressure by the fluid of the container 31 and the upper member 14. In other words, each of the pressing portions 18 and 19 is the lower member 15, and the common support portion 17 uses the upper member 14 as a cylinder and the lower member 15 as a piston. As a result, the same pressure is applied to each of the cooling bodies 1 and 2. Further, the lower member 15 of the support 7 presses the cooling body 1 against the plate material 21, and the lower member 15 of the support 8 presses the cooling body 2 against the plate material 22.

以上のように、冷却機は、板材２１，２２各々に対する冷却体１，２各々の位置決めを容易に行うことができる。さらに、冷却機は、押圧部１８，１９各々により冷却体１，２が同じ押圧力で板材２１，２２に接触する。その結果、冷却機は、板材２１に対する冷却体１の接触熱抵抗と板材２２に対する冷却体２の接触熱抵抗とを同一にして、板材２１，２２を均一に冷却することができる。さらに、冷却機は、接触熱抵抗が飽和するときの圧力よりも小さい圧力を冷却体１，２に付与して、左右の接触熱抵抗を同一にできる。そのため、冷却機は、板材２１，２２が例えばオーステナイト系鋼よりも柔らかいフェライト系鋼であっても、冷却体１，２との接触疵の発生を抑制して、板材２１，２２を左右均等に冷却することができる。 As described above, the cooling machine can easily position the cooling bodies 1 and 2 with respect to the plate materials 21 and 22 respectively. Further, in the cooler, the cooling bodies 1 and 2 come into contact with the plate materials 21 and 22 with the same pressing force by the pressing portions 18 and 19 respectively. As a result, the cooler can cool the plate materials 21 and 22 uniformly by making the contact thermal resistance of the cooling body 1 to the plate material 21 and the contact heat resistance of the cooling body 2 to the plate material 22 the same. Furthermore, the cooler can apply the pressure smaller than the pressure when the contact thermal resistance is saturated to the cooling bodies 1 and 2 to make the left and right contact thermal resistances the same. Therefore, even if the plate materials 21 and 22 are ferritic steel softer than austenitic steel, for example, the cooler suppresses generation of contact flaws with the cooling bodies 1 and 2 so that the plate materials 21 and 22 are evenly distributed on the left and right. Can be cooled.

本発明は、自動車のフレームなどの鋼板を溶接する溶接装置に利用可能である。 INDUSTRIAL APPLICABILITY The present invention can be used for a welding apparatus that welds steel plates such as automobile frames.

１，２：冷却体
３，４：圧縮ばね
５：ステージ
７，８：支持部
９：梁
１０：溶接トーチ
１１：取付具
１４：上部位
１５：下部位
１６：押え板
２１，２２：板材
１７：共通支持部
１８，１９：押圧部
３１：密閉容器
３２：調整部 DESCRIPTION OF SYMBOLS 1, 2: Cooling body 3, 4: Compression spring 5: Stage 7, 8: Support part 9: Beam 10: Welding torch 11: Mounting tool 14: Upper part 15: Lower part 16: Presser plate 21,22: Plate material 17 : Common support part 18, 19: Press part 31: Airtight container 32: Adjustment part

Claims

A cooler for cooling the first and second plate members when welding a first plate member and a second plate member that is thicker than the first plate member;
A stage for placing the first plate member and the second plate member with their side surfaces in contact with each other;
A first cooling body in contact with an upper surface of the first plate member;
A second cooling body in contact with the upper surface of the second plate member;
1 or 2 or more 1st press parts which press the said 1st cooling body against the said 1st board | plate material,
1 or 2 or more 2nd press parts which press the said 2nd cooling body against the said 2nd board | plate material,
E Bei a common support for supporting the said first pressing portion and the second pressing portion in common,
The first pressing portion includes a first compression spring,
The second pressing portion includes a second compression spring;
The first and second compression springs satisfy the following formula (1) and have a spring constant k [N / m / m ² ] per unit area defined by the formula (2 ). P [N / m ² ] is the pressing force when the contact thermal resistance between the first and second cooling bodies and the first and second plate members is saturated, and t _A [m] is the above The thickness of the second plate member, where n [pieces] is the number of each of the first and second compression springs, and k _i is the spring constant of each of the first and second compression springs. And S [m ² ] is a cooler in which each of the first and second cooling bodies is in contact with each of the first and second plate members .

The cooler according to claim 1 ,
The first and second compression springs have a spring constant k [N / m / m ² ] per unit area that satisfies the following formula (3), and in the formula (3), ρ [N / m ² ] Is the yield stress of the second plate, and t _B [m] is the thickness of the second plate.

A cooler for cooling the first and second plate members when welding a first plate member and a second plate member that is thicker than the first plate member;
A stage for placing the first plate member and the second plate member with their side surfaces in contact with each other;
A first cooling body in contact with an upper surface of the first plate member;
A second cooling body in contact with the upper surface of the second plate member;
1 or 2 or more 1st press parts which press the said 1st cooling body against the said 1st board | plate material,
1 or 2 or more 2nd press parts which press the said 2nd cooling body against the said 2nd board | plate material,
A common support portion that supports the first pressing portion and the second pressing portion in common ,
The common support part includes an airtight container filled with a fluid that presses the first and second pressing parts with the same pressure,
The first and second pressing parts include a cylinder, and a cooler.

It is a cooling machine given in any 1 paragraph of Claims 1-3 ,
The number of the first pressing parts is two or more, and is arranged linearly and symmetrically on the first cooling body,
The number of the second pressing portions is two or more, and the cooler is arranged linearly and symmetrically on the second cooling body.

The cooler according to any one of claims 1 to 4 ,
And a welding torch disposed above the stage.