JP5178373B2 - Bonding structure and bonding method between rod-shaped body and plate-shaped body - Google Patents
Bonding structure and bonding method between rod-shaped body and plate-shaped body Download PDFInfo
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本発明は、互いにトルクを伝達し合う棒状体と板状体との間の結合構造および結合方法に関する。 The present invention relates to a coupling structure and a coupling method between a rod-shaped body and a plate-shaped body that transmit torque to each other.
例えば図１に見られるように、保持体４に回転可能に取付けた操作軸６に操作レバー７，７と支持アーム８，８を固定するとともに、当該支持アーム８の先端部に前記操作軸６と平行な係合ピン９を側設し、前記操作レバー７，７を動かすことにより、係合ピン９を作動させるような動作伝達機構は各分野で広く用いられている。なお、この伝達機構は特許文献１に記載の「折畳みテーブル」に用いられているものである。そして、図１中、１４はばね体、２９はコイル部、３０は脚線である。
上記伝達機構にあっては、操作軸６の側端部に操作レバー７が溶接等により一体的に固着されている。
In the transmission mechanism, the operation lever 7 is integrally fixed to the side end portion of the operation shaft 6 by welding or the like.
上記のような動作伝達機構は、板状体が棒状体の端部に溶接等により一体的に固着されている。そして、耐食性、耐久性を付与するために、溶接等により固着された後、ＺｎないしＺｎ系合金のめっきが施されて使用されている。
元来、動作伝達機構は、板状体と棒状体との間にトルクがかかる。このため、それぞれの間の接合には十分な溶接強度が求められ、その溶接接合に手間を要していた。また溶接によりそれぞれの部材に熱歪みが生じ、全体として形状が不安定になるという問題もある。そこで、例えばアーク溶接で溶接接合しようとすると、各部材を固定治具で正確に拘束した後に溶接を施す必要があるため、寸法精度の高い固定治具が要求される。このため、溶接技術の他に治具作製技術も必要になって、結果的に製造コストの上昇を招いている。
In the motion transmission mechanism as described above, the plate-like body is integrally fixed to the end of the rod-like body by welding or the like. And in order to give corrosion resistance and durability, after fixing by welding etc., plating of Zn thru | or Zn-type alloy is given and used.
Originally, in the motion transmission mechanism, torque is applied between the plate-like body and the rod-like body. For this reason, sufficient welding strength is calculated | required for joining between each, The effort was required for the welding joining. In addition, there is a problem that thermal distortion occurs in each member due to welding and the shape becomes unstable as a whole. Therefore, for example, if welding is to be performed by arc welding, it is necessary to perform welding after accurately restraining each member with a fixing jig, and thus a fixing jig with high dimensional accuracy is required. For this reason, a jig manufacturing technique is required in addition to the welding technique, resulting in an increase in manufacturing cost.
また、このような板状体と棒状体との結合体にも耐食性、耐久性が求められるため、素材として、耐食性に優れた、例えばＺｎ−Ａｌ−Ｍｇ系合金等のＺｎ合金系のめっきが施された鋼材を用い、溶接接合により製品を得ようとすると、溶融金属脆化割れを起こしやすいので、溶接作業等に細心の注意を払わなければならず、コスト上昇の一因にもなっている。
そこで、溶接接合した半製品にポストめっきを施そうとすると、物干し状の取付治具に吊り下げた後、脱脂、水洗、電解脱脂、洗浄等を繰り返した後、めっき浴に浸漬し、その後に洗浄、乾燥させる一連の作業を行わざるを得ず、非常に手間がかかって製造コストの上昇を招いている。
In addition, since the corrosion resistance and durability are also required for such a combination of a plate-like body and a rod-like body, a Zn alloy-based plating such as a Zn-Al-Mg-based alloy having excellent corrosion resistance is used as a material. If you try to obtain a product by welding joint using the applied steel material, it is easy to cause molten metal embrittlement cracking, so you have to pay close attention to welding work etc., which also contributes to cost increase Yes.
Therefore, when post-plating is performed on a welded semi-finished product, after hanging on a clothes-drying mounting jig, degreasing, water washing, electrolytic degreasing, washing, etc. are repeated, and then immersed in a plating bath. A series of operations of cleaning and drying must be performed, which is very time-consuming and causes an increase in manufacturing cost.
本発明は、このような課題を解決するために案出されたものであり、溶接接合箇所を極力少なくしても所要のトルク伝達が可能な、かつポストめっきを行わなくても耐久性、耐食性を維持できる板状体と棒状体との結合体を低コストで提供することを目的とするものである。 The present invention has been devised in order to solve such a problem. The required torque can be transmitted even if the number of welded joints is reduced as much as possible, and durability and corrosion resistance can be achieved without post plating. It is an object to provide a combined body of a plate-like body and a rod-like body capable of maintaining the above at low cost.
本発明の棒状体と板状体との結合構造は、その目的を達成するため、棒状体とその一端に結合された板状体との結合構造であって、棒状体が円筒体であり、板状体の結合箇所に半抜き加工により形成された非円形凹部に、前記円筒体の端部外面に当該円筒体の端部に形成されたフランジにフランジ抜き加工が施されて形成された非円形部が嵌合され、当該円筒体端部外面の非円形部と前記板状体の非円形凹部とが溶接接合されていることを特徴とする。 In order to achieve the object, the connecting structure of the rod-shaped body and the plate-shaped body of the present invention is a coupling structure of the rod-shaped body and the plate-shaped body coupled to one end thereof, and the rod-shaped body is a cylindrical body, A non-circular recess formed by half-punching at the joining portion of the plate-like body, and a non-circular recess formed by applying flange punching to the flange formed at the end of the cylindrical body on the outer surface of the end of the cylindrical body. The circular part is fitted, and the non-circular part of the outer surface of the cylindrical body end part and the non-circular concave part of the plate-like body are welded and joined.
そして、この非円形凹部の上面形状としては、円形部とその径方向に突出した少なくとも二つの突出部から形成される平面形状を有するように形作ることが好ましい。この際、円筒体端部外面に形成された非円形部も、円筒体端部外面の径方向に形成された少なくとも二つの突出部を有する形状に形作る必要がある。
円筒体および板状体は、Ｚｎ−Ａｌ−Ｍｇ系の合金めっき鋼から形成されたものであることが好ましい。
The top surface of the non-circular recess is preferably formed to have a planar shape formed from a circular portion and at least two protrusions protruding in the radial direction. At this time, the non-circular portion formed on the outer surface of the cylindrical body end also needs to be formed into a shape having at least two protrusions formed in the radial direction of the outer surface of the cylindrical body end.
The cylindrical body and the plate-like body are preferably formed from Zn—Al—Mg based alloy plated steel.
このような棒状体と板状体との結合構造は、棒状体である円筒体の端部に、フランジ部が基材円筒体を構成する筒面に対して略垂直になるように拡開のフランジ加工を施した後、フランジ部を打抜き加工することにより円筒体の端部外面に非円形部を形成するとともに、板状体の結合箇所に半抜き加工により非円形凹部を形成した後、前記円筒体端部の非円形部を前記板状体の非円形凹部に嵌合し、当該嵌合部において、円筒体端部外面の非円形部と板状体の非円形凹部とを溶接接合することにより形成される。 Such a connecting structure of a rod-shaped body and a plate-shaped body is expanded at the end of the cylindrical body that is a rod-shaped body so that the flange portion is substantially perpendicular to the cylindrical surface constituting the base material cylindrical body. After performing the flange processing, the flange portion is punched to form a non-circular portion on the outer surface of the end portion of the cylindrical body, and after forming the non-circular concave portion by semi-punching in the joining portion of the plate-like body, The non-circular portion of the cylindrical body end portion is fitted into the non-circular concave portion of the plate-like body, and the non-circular portion of the cylindrical body end portion and the non-circular concave portion of the plate-like body are welded and joined at the fitting portion. Is formed.
本発明によれば、棒状体の端部外面に非円形部を形成するとともに、板状体の接続部に半抜き加工により非円形凹部を形成し、この非円形凹部に棒状体の端部外面に形成した非円形部を嵌合し、両者を溶接接合している。所要のトルクの伝達は、両者に形成した非円形部と非円形凹部の嵌合構造によりなされるため、この溶接接合は単に両者を固定するに必要な箇所のみ行うことで十分である。 According to the present invention, the non-circular portion is formed on the outer surface of the end portion of the rod-shaped body, and the non-circular recess portion is formed in the connecting portion of the plate-shaped body by half-punching. The non-circular portions formed in the above are fitted and welded together. Since the required torque is transmitted by the fitting structure of the non-circular portion and the non-circular concave portion formed on both, it is sufficient to perform this welding joint only at a portion necessary for fixing both.
したがって、溶接接合箇所を極力少なくしても所要のトルク伝達が可能な棒状体と板状体との結合構造を低コストで提供することができる。また、溶接接合箇所を極力少なくすることができるので、溶接時の熱ひずみの発生を防止して形状精度の高い製品が得られる。さらに、素材として、Ｚｎ−Ａｌ−Ｍｇ系合金等、Ｚｎ合金系のめっきを施した鋼材の使用が可能となり、ポストめっき工程の回避とも相俟って、耐食性、耐久性に優れた棒状体と板状体との結合構造を低コストで提供することができる。 Therefore, it is possible to provide a coupling structure of a rod-like body and a plate-like body capable of transmitting a required torque even if the number of welded joints is reduced as much as possible at a low cost. In addition, since the number of welded joints can be reduced as much as possible, the occurrence of thermal strain during welding can be prevented and a product with high shape accuracy can be obtained. Furthermore, it becomes possible to use steel materials plated with Zn alloys such as Zn-Al-Mg alloys as materials, and in combination with avoidance of the post plating process, A connection structure with a plate-like body can be provided at low cost.
本発明者等は、トルク伝達が可能な板状体と棒状体との結合体として、所要の機能を有するものを低コストで得るべく、その構造および製造工程の改善可能性について鋭意検討を重ねてきた。
その過程で、従来の板状体と棒状体との結合体の構造が多くの溶接工程を必要とするものであるため、コスト削減の意味ではその溶接工程の削減が可能となる構造に変更することが有効であることに到達した。
The inventors of the present invention have intensively studied the possibility of improving the structure and the manufacturing process in order to obtain a combination of a plate-like body and a rod-like body capable of torque transmission having a required function at a low cost. I came.
In the process, the conventional structure of the combination of the plate-like body and the rod-like body requires a lot of welding processes. Therefore, in terms of cost reduction, the structure is changed so that the welding process can be reduced. It has been reached that it is effective.
すなわち、従来の板状体と棒状体との結合体は、前記した通り、棒状体の端部に板状体が溶接により一体に固着されている。板状体または棒状体の一方を操作して両者間にトルクが負荷された際、板状体と棒状体との継手箇所が外れたり、継手が変形したりしないように、板状体に当接させた棒状体端部の全域に亘って強固に溶接接合されている。このため、溶接線の長さが長くなっており、この溶接により両部材に熱歪みが生じることもある。そこで、確実な溶接を行うために、治具を必要としたり、高度な溶接技術を必要としたりするために、結果的にコスト高となっている。
したがって、本発明は、棒状体と板状体との結合構造を変更することにより、溶接の箇所、長さを極力低減し、コストを削減させようとするものである。
以下にその詳細を説明する。
In other words, as described above, the conventional combination of the plate-like body and the rod-like body has the plate-like body integrally fixed to the end of the rod-like body by welding. When one of the plate or rod is operated and a torque is applied between them, the joint of the plate and rod is not detached or the joint is not deformed. It is firmly welded over the entire area of the end of the contacted rod-like body. For this reason, the length of the weld line is long, and thermal distortion may occur in both members by this welding. Therefore, in order to perform reliable welding, a jig is required or an advanced welding technique is required, resulting in high costs.
Therefore, the present invention seeks to reduce the cost and the cost by reducing the welding location and length as much as possible by changing the connecting structure of the rod-like body and the plate-like body.
Details will be described below.
板状体に当接させた棒状体の端部全域に亘って溶接を施した結合構造にあっても、板状体または棒状体の何れかにトルクが負荷された際、両者間の継手箇所が外れたり、継手が変形したりすることなく、トルクを確実に伝達できる構造が必要である。
そこで、本発明では、板状体の接合箇所に半抜き加工により非円形凹部を形成するとともに、棒状体の端部外面に非円形部を形成し、この棒状体端部の非円形部を前記板状体の非円形凹部に嵌合させ、その嵌合部において、板状体と棒状体とを溶接により固着した構造を採用した。
Even in a joint structure where welding is performed over the entire end of the rod-shaped body abutted against the plate-shaped body, when torque is applied to either the plate-shaped body or the rod-shaped body, the joint location between the two There is a need for a structure that can reliably transmit torque without detachment or deformation of the joint.
Therefore, in the present invention, a non-circular recess is formed in the joining portion of the plate-like body by half punching, and a non-circular portion is formed on the outer surface of the end of the rod-like body. A structure in which the non-circular concave portion of the plate-like body is fitted and the plate-like body and the rod-like body are fixed by welding at the fitting portion is adopted.
板状体と棒状体との連結が、両者に形成した非円形部と非円形凹部の嵌合構造によりなされるため、何の問題なく所要のトルクの伝達がなされる。
もともと、板状体と棒状体とからなるトルク伝達機構にあっては、板状体の動きは棒状体の回動方向と重なる往復動のみであって、棒状体の軸方向の動きはない。このため、棒状体端部に嵌合された板状体が棒状体からその軸方向に外れるおそれはほとんどない。また、前記した通り、非円形部と非円形凹部の嵌合構造を採用しているために、棒状体の回動方向に対して板状体が回動することもない。したがって、板状体と棒状体の固着は、非円形部と非円形凹部の嵌合部において、簡便な溶接、例えばスポット的な溶接を施すのみで十分となる。
Since the connection between the plate-like body and the rod-like body is made by the fitting structure of the non-circular portion and the non-circular concave portion formed on the both, the required torque can be transmitted without any problem.
Originally, in a torque transmission mechanism composed of a plate-like body and a rod-like body, the movement of the plate-like body is only a reciprocating motion that overlaps the rotation direction of the rod-like body, and there is no movement of the rod-like body in the axial direction. For this reason, there is almost no possibility that the plate-like body fitted to the end of the rod-like body will be detached from the rod-like body in the axial direction. Further, as described above, since the fitting structure of the non-circular portion and the non-circular concave portion is adopted, the plate-shaped body does not rotate with respect to the rotation direction of the rod-shaped body. Therefore, the plate-like body and the rod-like body can be fixed by simply performing simple welding, for example, spot-like welding, at the fitting portion between the non-circular portion and the non-circular concave portion.
次に、本発明の棒状体と板状体との結合構造の、好ましい構築態様について説明する。
棒状体と板状体との結合構造を構築する一方の部材である棒状体としては、丸鋼管等、金属からなる円筒体であることが好ましい。この円筒体の両端外面に非円形部を形成する。例えば、図２，３に示すように、円筒体の端部に、フランジ部が基材円筒体を構成する筒面に対して略垂直になるように拡開のフランジ加工を施す。この際、円錐面を有する金型を用いて４５°程度の角度の先端穴広げ加工を施した後、平らな面を有する金型を用いて筒面に対して略垂直なフランジ部を形成することが好ましい。その後、フランジ部に打抜き加工を施すことによりリテーナとなる円筒体の端部に、二つ以上の突出部を有する非円形部を形成する。
Next, a preferable construction aspect of the coupling structure of the rod-shaped body and the plate-shaped body of the present invention will be described.
The rod-like body, which is one member for constructing the connection structure between the rod-like body and the plate-like body, is preferably a cylindrical body made of metal such as a round steel pipe. Non-circular portions are formed on the outer surfaces of both ends of the cylindrical body. For example, as shown in FIGS. 2 and 3, the end of the cylindrical body is subjected to widening flange processing so that the flange portion is substantially perpendicular to the cylindrical surface constituting the base cylindrical body. At this time, after performing a tip hole widening process at an angle of about 45 ° using a die having a conical surface, a flange portion substantially perpendicular to the cylindrical surface is formed using a die having a flat surface. It is preferable. Then, the non-circular part which has a 2 or more protrusion part is formed in the edge part of the cylindrical body used as a retainer by punching a flange part.
他方の部材である板状体の円筒体接続部位に、前記円筒体端部に形成した非円形部の形状に合致する形状の非円形凹部を形成する。この非円形凹部を簡便に成形する手段として、本発明では、半抜き加工を採用した。
例えば、図４に示すように、板状体の円筒体接続部位に円筒体の内径と合致する穴を打抜いた後、この穴の外周に、円筒体端部に形成した非円形部形状に合致する形状の非円形凹部を半抜き加工により形成する。
A non-circular concave portion having a shape matching the shape of the non-circular portion formed at the end of the cylindrical body is formed in the cylindrical body connecting portion of the plate-like body as the other member. In the present invention, half punching is employed as a means for easily forming this non-circular recess.
For example, as shown in FIG. 4, after punching a hole that matches the inner diameter of the cylindrical body at the cylindrical body connecting portion of the plate-like body, a non-circular portion shape formed at the end of the cylindrical body is formed around the hole. A matching non-circular recess is formed by half blanking.
上記のような非円形凹部が形成された板状体の前記非円形凹部に、円筒体端部の非円形部を嵌合する。その後、嵌合部において、円筒体と板状体を溶接接合する（図５参照）。
構築された円筒体と板状体からなる結合体は図６に示される通りとなる。
溶接方法としては、通電抵抗によるスポット溶接、アークによるスポット溶接、プロジェクション溶接などが好ましい。
The non-circular portion at the end of the cylindrical body is fitted into the non-circular concave portion of the plate-like body formed with the non-circular concave portion as described above. Thereafter, in the fitting portion, the cylindrical body and the plate-like body are welded and joined (see FIG. 5).
The constructed combined body composed of a cylindrical body and a plate-like body is as shown in FIG.
As the welding method, spot welding by current resistance, spot welding by arc, projection welding, or the like is preferable.
なお、板状体に形成する非円形凹部の形状としては、図４に見られるように円形部とその四方に突出した四つの突出部からなる平面形状を有するものの他に、図７に示すような、二方向あるいは三方向に突出した二つないし三つの突出部を形成したものでもよい。もちろん五つ以上の突出部を形成したものであってもよい。なお、溶接接合箇所は、図７に見られるように突出部のコーナー部とすることが好ましい。
いずれにしても、板状体に対して嵌合したフランジが回転しない形状であれば、様々な形状が選択できる。ただし、突出部は、点対称になるような形状・配置とすることが好ましい。
As shown in FIG. 7, the shape of the non-circular recess formed in the plate-like body is as shown in FIG. 7 in addition to a flat shape including a circular portion and four protruding portions protruding in the four directions as seen in FIG. Alternatively, two or three protruding portions protruding in two or three directions may be formed. Of course, five or more protrusions may be formed. In addition, it is preferable that a welding joining location is made into the corner part of a protrusion part, as seen in FIG.
In any case, various shapes can be selected as long as the flange fitted to the plate-like body does not rotate. However, it is preferable that the protrusions have a shape / arrangement that is point-symmetric.
以上は、棒状体が例えば丸鋼管であるような場合の結合機構の構築方法について説明したが、棒状体として、例えば丸鋼棒のような中実丸棒であってもよい。
この場合、中実丸棒の端部側面に溶接法等を採用して突起物を固着して円筒体と板状体端部に非円形部を形成してもよいが、溶接法等の採用は当初の目的を逸脱することになるので、中実丸棒を構成する材料そのものに加工を加えて端部に非円形部を形成することが好ましい。
丸形状から非円形形状に変える加工法としては、鍛造法、切削法あるいは研削法が挙げられる。いずれの方法を用いてもよい。
In the above, the construction method of the coupling mechanism in the case where the rod-shaped body is, for example, a round steel pipe has been described. However, the rod-shaped body may be a solid round bar, for example, a round steel rod.
In this case, a welding method or the like may be employed on the end side surface of the solid round bar to fix the protrusions to form a non-circular portion at the end of the cylindrical body and the plate-like body. Therefore, it is preferable to process the material itself constituting the solid round bar to form a non-circular portion at the end.
Examples of the processing method for changing from a round shape to a non-circular shape include a forging method, a cutting method, and a grinding method. Any method may be used.
中実丸棒端部に形成した非円形部と合致する形状の非円形凹部を板状体の接合部位に半抜き加工法により形成し、非円形凹部が形成された板状体の前記非円形凹部に、中実丸棒端部の非円形部を嵌合する。その後、嵌合部において中実丸棒と板状体を溶接接合する。
この場合の溶接方法としては、アークによるスポット溶接が好ましい。
なお、前記中実丸棒端部に形成する非円形部の形状としては、加工法にもよるが、鍛造法を採用する場合は矩形形状に、切削法や研削法を採用する場合は四角、六角等の正多角形とすることが好ましい。
The non-circular concave portion having a shape matching the non-circular portion formed at the end of the solid round bar is formed by a half-punching method at the joining portion of the plate-like body, and the non-circular shape of the plate-like body having the non-circular concave portion is formed. The non-circular portion at the end of the solid round bar is fitted into the recess. Thereafter, the solid round bar and the plate-like body are welded and joined at the fitting portion.
As a welding method in this case, spot welding by an arc is preferable.
The shape of the non-circular portion formed at the end of the solid round bar depends on the processing method, but when adopting the forging method is rectangular, when adopting the cutting method or grinding method, A regular polygon such as a hexagon is preferable.
以上説明したように、板状体と棒状体との結合構造が、非円形凹部と非円形部との嵌合構造によりなされるため、板状体または棒状体の一方を操作したときに、他方へのトルクの伝達が問題なく確実に行われる。しかも、前記した通り、板状体と棒状体の固着は、非円形部と非円形凹部の嵌合部において、簡便な溶接、例えばスポット的な溶接を施すのみで足りる。 As described above, since the connection structure between the plate-like body and the rod-like body is formed by the fitting structure of the non-circular recess and the non-circular portion, when one of the plate-like body or the rod-like body is operated, the other Torque is reliably transmitted without problems. In addition, as described above, the plate-like body and the rod-like body need only be simply welded, for example, spot-like welding, at the fitting portion between the non-circular portion and the non-circular concave portion.
板状体と棒状体の固着に必要な溶接の箇所および長さを少なく、また短くすることができるために、素材としてＺｎめっき、Ｚｎ−Ａｌ合金めっき、Ｚｎ−Ａｌ−Ｍｇ合金めっき等のＺｎ系のめっきが施された鋼板、鋼管が使用できる。
なお、このようなプレめっきが施されたものを素材とする際には、基本的に非円形部のどの部分で溶接接合しても問題はないが、非円形部を形作る突端部付近で溶接接合することが好ましい。また、通電抵抗によるスポット溶接法を採用する際は、電極が所定の位置以外に接触することによる分流が発生しないように、電極形状などに留意することが好ましい。
Since the number and length of welding necessary for fixing the plate-like body and the rod-like body can be reduced and shortened, Zn such as Zn plating, Zn-Al alloy plating, Zn-Al-Mg alloy plating, etc. can be used as a material. Steel plates and steel pipes that have been plated can be used.
When using pre-plated material as a material, there is basically no problem in welding and joining at any part of the non-circular part, but welding is performed near the tip that forms the non-circular part. It is preferable to join. In addition, when adopting the spot welding method using energization resistance, it is preferable to pay attention to the electrode shape and the like so that no shunting occurs due to the electrode coming into contact with other than a predetermined position.
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