JP6619654B2 - Manufacturing method of pipe with bracket - Google Patents
Manufacturing method of pipe with bracket Download PDFInfo
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- JP6619654B2 JP6619654B2 JP2016004902A JP2016004902A JP6619654B2 JP 6619654 B2 JP6619654 B2 JP 6619654B2 JP 2016004902 A JP2016004902 A JP 2016004902A JP 2016004902 A JP2016004902 A JP 2016004902A JP 6619654 B2 JP6619654 B2 JP 6619654B2
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Description
本発明は、ブラケット付パイプの製造方法に関する。 The present invention relates to a method for manufacturing a pipe with a bracket.
自動車の駆動力伝達装置等に例えば油を供給する金属のパイプは、適当な部位で、その駆動力伝達装置等に固定される。そこで、パイプには、固定対象となる構造体にパイプを固定するための金属のブラケットが取り付けられているものがある。ブラケットは、ろう付けによってパイプに取り付けられている（例えば、特許文献１参照）。 For example, a metal pipe that supplies oil to a driving force transmission device or the like of an automobile is fixed to the driving force transmission device or the like at an appropriate portion. Therefore, some pipes are provided with a metal bracket for fixing the pipe to a structure to be fixed. The bracket is attached to the pipe by brazing (see, for example, Patent Document 1).
ブラケットをパイプに取り付ける場合、まず、ＴＩＧ（Tungsten Inert Gas；タングステン不活性ガス）溶接やスポット溶接によってブラケットとパイプとを仮固定し、その後、ろう付けにより、ブラケットとパイプとを本固定することが行われることがある。
しかし、ＴＩＧ溶接やスポット溶接は、作業に熟練が必要であり、また手間が掛る。そして、作業の熟練度が低いと、製造されたブラケット付パイプの寸法精度（傾き等の精度）が低くなる場合がある。
本発明は上記事情に鑑みなされたものであって、仮固定としてＴＩＧ溶接やスポット溶接等の溶接を行うことなくブラケット付パイプを製造することができるブラケット付パイプの製造方法を提供することを目的とする。
When attaching the bracket to the pipe, first, the bracket and the pipe are temporarily fixed by TIG (Tungsten Inert Gas) welding or spot welding, and then the bracket and the pipe are permanently fixed by brazing. Sometimes done.
However, TIG welding and spot welding require skill for work and are troublesome. If the skill level of the work is low, the dimensional accuracy (accuracy such as inclination) of the manufactured pipe with bracket may be low.
This invention is made in view of the said situation, Comprising: It aims at providing the manufacturing method of a pipe with a bracket which can manufacture a pipe with a bracket without performing welding, such as TIG welding and spot welding, as temporary fixation. And
本発明は、板状のブラケットに、パイプを通す、前記パイプの外径よりも大きい直径のバーリング加工孔を形成し、前記バーリング加工孔に前記パイプを通し、前記バーリング加工孔のつばを、外方から中心に向かってかしめて、前記ブラケットと前記パイプとを仮固定し、仮固定された前記ブラケットと前記パイプとをろう付けして本固定する、ブラケット付パイプの製造方法である。 According to the present invention, a burring hole having a diameter larger than the outer diameter of the pipe is formed through the plate-like bracket, and the pipe is passed through the burring hole. It is a manufacturing method of a pipe with a bracket in which the bracket and the pipe are temporarily fixed by caulking from one side to the center, and the temporarily fixed bracket and the pipe are brazed and finally fixed.
本発明に係るブラケット付パイプの製造方法によれば、仮固定でＴＩＧ溶接やスポット溶接等の溶接を行うことなくブラケット付パイプを製造することができる。 According to the method for manufacturing a pipe with brackets according to the present invention, the pipe with brackets can be manufactured without performing temporary fixation such as TIG welding or spot welding.
以下、本発明に係るブラケット付パイプの製造方法の実施形態について、図面を用いて説明する。
＜ブラケット付パイプの構成＞
図1は、本実施形態の製造方法により製造されるブラケット付パイプ１を示す模式図である。図示のブラケット付パイプ１は、パイプ２とブラケット３とが接合された構成である。
Hereinafter, an embodiment of a manufacturing method of a pipe with a bracket concerning the present invention is described using a drawing.
<Configuration of pipe with bracket>
FIG. 1 is a schematic view showing a bracketed pipe 1 manufactured by the manufacturing method of the present embodiment. The illustrated pipe with bracket 1 has a structure in which a pipe 2 and a bracket 3 are joined.
パイプ２は、パイプ本体２ａとキャップ２ｂとが接合された構成である。
パイプ本体２ａは、例えば外径６．３５［ｍｍ］の金属円管を長手方向の２か所で屈曲し、長手方向の両端は互いに略平行に延びている。
キャップ２ｂは、パイプ本体２ａの一端部（図示において上端部）に接合されている。キャップ２ｂは、パイプ本体よりも太い外径の円筒状に形成されている。キャップ２ｂは、円筒の一方の端面（図示において上端面）が端板によって完全に塞がれていて、他方の端面（図示において下端面）が、パイプ本体２ａを挿入できる程度の孔が形成された端板で塞がれている。また、キャップ２ｂの周壁には、内部空間と外部とを通じさせる小孔２ｃが形成されている。
The pipe 2 has a configuration in which a pipe body 2a and a cap 2b are joined.
The pipe body 2a is formed by bending, for example, a metal circular tube having an outer diameter of 6.35 [mm] at two locations in the longitudinal direction, and both ends in the longitudinal direction extend substantially parallel to each other.
The cap 2b is joined to one end (upper end in the figure) of the pipe body 2a. The cap 2b is formed in a cylindrical shape having an outer diameter larger than that of the pipe body. In the cap 2b, one end face (upper end face in the figure) of the cylinder is completely closed by an end plate, and the other end face (lower end face in the figure) is formed with a hole that allows the pipe body 2a to be inserted. It is blocked with a rough end plate. A small hole 2c is formed in the peripheral wall of the cap 2b to allow the internal space and the outside to pass therethrough.
そして、キャップ２ｂの他方の端部を塞いだ端板に形成された孔に、パイプ本体２ａの一方の端部が差し込まれて、パイプ本体２ａの内部空間とキャップ２ｂの内部空間とが通じた状態で、パイプ本体２ａとキャップ２ｂとが接合されている。パイプ本体２ａとキャップ２ｂとの接合は、端板の孔にパイプ本体２ａを圧入することによる摩擦力での接合であってもよいし、端板の孔の周縁をパイプ本体２ａの外周面と溶接又はろう付けする接合であってもよい。
このようにして形成されているパイプ２は、パイプ本体２ａの一方の端部（図示において下端部）から内部空間に供給されたオイルを、パイプ本体２ａからキャップ２ｂに流し、キャップ２ｂの小孔２ｃから外部に排出させる。
Then, one end of the pipe body 2a was inserted into a hole formed in the end plate that closed the other end of the cap 2b, and the internal space of the pipe body 2a and the internal space of the cap 2b communicated. In the state, the pipe body 2a and the cap 2b are joined. The joining of the pipe body 2a and the cap 2b may be a joining by frictional force by press-fitting the pipe body 2a into the hole of the end plate, and the periphery of the hole of the end plate is connected to the outer peripheral surface of the pipe body 2a. It may be a welded or brazed joint.
In the pipe 2 formed in this way, oil supplied to the internal space from one end portion (lower end portion in the drawing) of the pipe body 2a flows from the pipe body 2a to the cap 2b, and a small hole in the cap 2b. 2c is discharged to the outside.
図２Ａは、ブラケット３を示す模式図、図２Ｂは、図２ＡにおけるＩ−Ｉ線に沿った断面を示す断面図である。
ブラケット３は、厚さが例えば１［ｍｍ］の金属平板４から形成されている。そして、このブラケット３は、図２Ａ及び図２Ｂに示すように、孔５及び孔６（バーリング加工孔）が形成されている。孔５は、ブラケット付パイプ１を対象物（例えば、動力伝達装置）のケース等に組み付けるボルト等を通す孔である。一方、孔６は、パイプ２とブラケット３とが接合される部分である。
2A is a schematic view showing the bracket 3, and FIG. 2B is a cross-sectional view showing a cross section taken along line II in FIG. 2A.
The bracket 3 is formed from a metal flat plate 4 having a thickness of 1 [mm], for example. As shown in FIGS. 2A and 2B, the bracket 3 is formed with holes 5 and 6 (burring holes). The hole 5 is a hole through which a bolt or the like for assembling the bracketed pipe 1 to a case or the like of an object (for example, a power transmission device) is passed. On the other hand, the hole 6 is a portion where the pipe 2 and the bracket 3 are joined.
＜ブラケット付パイプの製造方法＞
まず、ブラケット３は、金属平板４に対して、プレス加工のパンチングによる穿孔で孔５と孔６の下孔とを形成する。その後、プレス加工のバーリングにより、パンチングで形成した孔６の下孔を拡張しながらつば（フランジ）７を形成する。
バーリングでは、孔６の内径をパイプ２の外径よりも大きい例えば６．４［ｍｍ］に拡張し、つば７を例えば板厚の２倍の２［ｍｍ］程度、表面から立ち上がって形成する。
なお、孔６を形成する際のパンチングとバーリングは、１回の工程で連続して行うようにしてもよいし、別々の工程で行ってもよい。
<Manufacturing method of pipe with bracket>
First, the bracket 3 forms the hole 5 and the lower hole of the hole 6 with respect to the metal flat plate 4 by punching by punching of press working. After that, the flange (flange) 7 is formed by expanding the lower hole of the hole 6 formed by punching by burring by press working.
In the burring, the inner diameter of the hole 6 is expanded to, for example, 6.4 [mm] larger than the outer diameter of the pipe 2, and the collar 7 is formed to rise from the surface, for example, about 2 [mm], which is twice the plate thickness.
Note that punching and burring when forming the holes 6 may be performed continuously in one step, or may be performed in separate steps.
図３Ａ、図３Ｂ及び図３Ｃは、パイプ２とブラケット３とを互いに固定する製造工程を示す断面図であり、図３Ａは、ブラケット３の孔６にパイプ２を挿入した状態、図３Ｂは、ブラケット３のつば７をかしめて仮固定した状態、図３Ｃは、仮固定後にろう付けで本固定した状態、をそれぞれ示す。 3A, 3B and 3C are cross-sectional views showing a manufacturing process for fixing the pipe 2 and the bracket 3 to each other. FIG. 3A shows a state in which the pipe 2 is inserted into the hole 6 of the bracket 3, and FIG. FIG. 3C shows a state where the flange 7 of the bracket 3 is caulked and temporarily fixed, and FIG. 3C shows a state where the bracket 3 is permanently fixed by brazing.
図３Ａに示すように、つば７が形成されたブラケット３の孔６に、パイプ２を図１の下端側から所定位置まで通す。このとき、つば７がブラケット３の上方に突出する向きで、ブラケット３を配置する。後述するつば７に対するかしめ作業を見易くするためである。
孔６にパイプ２を通した状態（図３Ａ参照）で、図３Ｂに示すように、つば７に、外方から中心に向かう荷重を掛けて、つば７をかしめる。かしめは、例えばかしめ装置を用いて行うことができる。
As shown in FIG. 3A, the pipe 2 is passed from the lower end side of FIG. 1 to a predetermined position through the hole 6 of the bracket 3 in which the collar 7 is formed. At this time, the bracket 3 is arranged in such a direction that the collar 7 protrudes above the bracket 3. This is to make it easy to see the caulking work for the collar 7 to be described later.
In a state where the pipe 2 is passed through the hole 6 (see FIG. 3A), the collar 7 is caulked by applying a load from the outside toward the center as shown in FIG. 3B. Caulking can be performed using, for example, a caulking device.
図４は、かしめ装置のかしめ刃の一例を示す模式図である。図４に示した一例のかしめ刃５１，５２のうち図示右側のかしめ刃５１は、固定かしめ刃であり、動かない。そして、かしめ刃５１は、つば７の外周に接触するかしめ刃部５１ａが、例えば半径４［ｍｍ］の半円弧状に形成されている。なお、つば７の外周の外径（直径）は８．２〜８．４［ｍｍ］程度である。 FIG. 4 is a schematic diagram illustrating an example of a caulking blade of a caulking device. The caulking blade 51 on the right side of the caulking blades 51 and 52 in the example shown in FIG. 4 is a fixed caulking blade and does not move. In the caulking blade 51, a caulking blade portion 51a that contacts the outer periphery of the collar 7 is formed in a semicircular arc shape having a radius of 4 [mm], for example. In addition, the outer diameter (diameter) of the outer periphery of the collar 7 is about 8.2 to 8.4 [mm].
一方、図示左側のかしめ刃５２は、スライドかしめ刃であり、図示左側から右側に移動し、また、移動後は元の位置まで左側に移動する。かしめ刃５２は、つば７の外周に接触するかしめ刃部５２ａが、例えば半径４［ｍｍ］の半円弧５２ｅに内接する形状であり、両端部５２ｂ，５２ｂ及び中央部５２ｃは半径４［ｍｍ］の円弧、各端部５２ｂと中央部５２ｃとを繋ぐ繋ぎ部５２ｄは直線で形成されている。 On the other hand, the caulking blade 52 on the left side in the figure is a slide caulking blade, and moves from the left side to the right side in the figure, and after the movement, moves to the left side to the original position. The caulking blade 52 has a shape in which a caulking blade portion 52a that contacts the outer periphery of the collar 7 is inscribed in a semicircular arc 52e having a radius of 4 [mm], for example, and both end portions 52b and 52b and the central portion 52c have a radius of 4 [mm]. The connecting portion 52d that connects each end 52b and the central portion 52c is formed in a straight line.
このようなかしめ刃５１，５２を有するかしめ装置によりつば７のかしめを行うとき、図４に示すように、つば７の外周の図示右側をかしめ刃部５１ａに接触させた状態でパイプ２及びブラケット３を保持する。そして、かしめ刃５２を図示右側にスライドさせてかしめ刃部５２ａを、保持されたつば７の外周の左側に接触させ、さらに、かしめ刃５２を右側に移動させてかしめ刃５１とかしめ刃５２とを突き合わせる。 When caulking the collar 7 by the caulking device having such caulking blades 51 and 52, as shown in FIG. 4, the pipe 2 and the bracket 2 with the right side of the outer periphery of the collar 7 in contact with the caulking blade portion 51a. 3 is held. Then, the caulking blade 52 is slid to the right side in the drawing to bring the caulking blade portion 52a into contact with the left side of the outer periphery of the held collar 7, and further, the caulking blade 52 is moved to the right side so that the caulking blade 51 and the caulking blade 52 Match.
これにより、つば７のうち、主に、かしめ刃５２の２つの繋ぎ部５２ｄ，５２ｄに接触した部分が、外方から中心に向けてかしめられて塑性変形する。そして、つばの塑性変形により、つば７の内周面と孔６に通されたパイプ２の外周面との間で強い摩擦力が発生し、パイプ２とブラケット３とは、ある程度の結合力で一体に結合された仮固定の状態となる。 As a result, the portion of the collar 7 that is in contact with the two connecting portions 52d and 52d of the caulking blade 52 is caulked from the outside toward the center and is plastically deformed. Due to the plastic deformation of the collar, a strong frictional force is generated between the inner circumferential surface of the collar 7 and the outer circumferential surface of the pipe 2 passed through the hole 6, and the pipe 2 and the bracket 3 are coupled with a certain amount of coupling force. It will be in the temporarily fixed state couple | bonded integrally.
かしめ後は、かしめ刃５２が図示左側にスライドして、仮固定で一体化されたパイプ２及びブラケット３を、かしめ機から取り外す。
なお、かしめ後のつば７には、主に、かしめ刃５２の繋ぎ部５２ｄ，５２ｄに接触した部分において、強い荷重を受けたことによるへこみや傷等の痕跡（かしめ痕）が残るが、このかしめ痕が残った部分だけがかしめられているわけではない。すなわち、本実施形態の製造方法では、かしめ刃部５１ａ，５２ａの内径はつば７の外径よりも小さいため、部分的に強く当たる部位もあるが、基本的には、つば７の全周がかしめ刃部５１ａ，５２ａに接触して、全周に亘ってかしめが行われる。
After caulking, the caulking blade 52 slides to the left in the figure, and the pipe 2 and the bracket 3 integrated by temporary fixing are removed from the caulking machine.
In addition, in the collar 7 after caulking, traces (caulking traces) such as dents and scratches due to receiving a strong load remain mainly in the portions in contact with the connecting portions 52d and 52d of the caulking blade 52. It is not the case that only the part where the caulking trace remains is caulked. That is, in the manufacturing method of the present embodiment, the inner diameters of the caulking blade portions 51a and 52a are smaller than the outer diameter of the collar 7, so that there is a portion that partially strikes, but basically, the entire circumference of the collar 7 is Caulking is performed over the entire circumference in contact with the caulking blade portions 51a and 52a.
仮固定されて一体化されたパイプ２及びブラケット３に対して、図３Ｃに示すように、ブラケット３の、つば７が突出した側と反対の面３ｂの側で、つば７の内面とパイプ２の外周面とをろう材８でろう付けすることにより、パイプ２とブラケット３とを本固定する。
これにより、パイプ２とブラケット３とは強い接合力で一体化され、ブラケット付パイプ１となる。
As shown in FIG. 3C, with respect to the pipe 2 and the bracket 3 that are temporarily fixed and integrated, the inner surface of the collar 7 and the pipe 2 on the side of the surface 3b opposite to the side from which the collar 7 protrudes. The pipe 2 and the bracket 3 are permanently fixed by brazing the outer peripheral surface of the pipe 2 with the brazing material 8.
Thereby, the pipe 2 and the bracket 3 are integrated with a strong joining force, and the bracketed pipe 1 is obtained.
また、つば７が形成されるとき、ブラケット３の、つば７が突出した側と反対の面３ｂの側では、つば７の根元の部分がＲ形状となるため、その面３ｂよりも凹んだ空間が形成される。そして、ろう付けのろう材８を、その凹んだ空間に配置するようにろう付けを行うことで、ろう材８がブラケットの３の面３ｂから突出することがない。したがって、ブラケット３を、その面３ｂを平面に設置して固定する場合にも、面３ｂから突出したろう材８で、平面との間でがたつきが生じるのを防ぐことができる。 Further, when the collar 7 is formed, the base part of the collar 7 has an R shape on the side of the surface 3b opposite to the side from which the collar 7 protrudes, so that the space recessed from the surface 3b is formed. Is formed. Then, the brazing material 8 is not projected from the surface 3b of the bracket 3 by brazing the brazing material 8 so as to be disposed in the recessed space. Therefore, even when the bracket 3 is fixed by installing the surface 3b on a flat surface, it is possible to prevent the brazing material 8 protruding from the surface 3b from rattling with the flat surface.
以上のように、本実施形態のブラケット付パイプ１の製造方法によれば、ブラケット３の、パイプ２を通す孔６を、バーリングによりつば７を形成したものとし、孔６にパイプを通した後につば７をかしめることで、パイプ２とブラケット３とをろう付けで本固定する前に、ＴＩＧ溶接やスポット溶接等の溶接を行わずに仮固定することができる。
したがって、ＴＩＧ溶接やスポット溶接等の溶接は、作業の熟練度によって寸法精度などの品質が左右され易いが、本実施形態のブラケット付パイプ１の製造方法では、そのような作業の熟練度で品質が左右されにくく、製造されたブラケット付パイプ１の寸法精度（傾き等の精度）が低くなるのを防止乃至抑制することができる。
As described above, according to the method for manufacturing the pipe with bracket 1 of the present embodiment, the hole 6 through which the pipe 2 is passed in the bracket 3 is formed with the collar 7 by burring, and after the pipe is passed through the hole 6. By caulking the collar 7, the pipe 2 and the bracket 3 can be temporarily fixed without performing welding such as TIG welding or spot welding before the main fixing by brazing.
Therefore, in welding such as TIG welding and spot welding, the quality such as dimensional accuracy is easily affected by the skill level of the work, but in the manufacturing method of the bracketed pipe 1 according to this embodiment, the quality is determined according to the skill level of such work. Can be prevented or suppressed from being reduced in dimensional accuracy (accuracy such as inclination) of the manufactured pipe 1 with bracket.
＜変形例＞
本実施形態のブラケット付パイプの製造方法は、つば７の全周に接触するかしめ刃５１，５２によりつば７をかしめたものであるが、かしめは、つば７の全周に接触するかしめ刃５１，５２でかしめるものでなくてもよい。すなわち、本実施形態の製造方法において、つば７の外周の一部にのみ接触する突起状のかしめ刃を用いて、つば７の複数個所を塑性変形させてかしめるものであってもよい。
<Modification>
The manufacturing method of the pipe with bracket according to the present embodiment is that the collar 7 is caulked by the caulking blades 51 and 52 that contact the entire circumference of the collar 7, but the caulking blade 51 that contacts the entire circumference of the collar 7. , 52 may not be used. That is, in the manufacturing method of the present embodiment, a plurality of portions of the collar 7 may be caulked by plastic deformation using a protruding caulking blade that contacts only a part of the outer periphery of the collar 7.
このように、つば７の一部のみをかしめることで、かしめの荷重をつば７の一部に集中させることができ、かしめの荷重が少ない場合でも、かしめの強度がつば７の全周に分散するのを避けて、効率的な仮固定を行うことができる。
本実施形態のブラケット付パイプの製造方法は、ブラケット３の、つば７が突出した側とは反対の面３ｂの側でろう付けを行ったが、ろう付けは、ブラケット３の、つば７が突出した側で行ってもよい。
In this way, by caulking only a part of the collar 7, the caulking load can be concentrated on a part of the collar 7. Even when the caulking load is small, the caulking strength is increased over the entire circumference of the collar 7. Efficient temporary fixing can be performed while avoiding dispersion.
In the manufacturing method of the bracketed pipe according to the present embodiment, brazing is performed on the side of the surface 3b of the bracket 3 opposite to the side from which the collar 7 protrudes. You may do it on the side you did.
１ ブラケット付パイプ
２ パイプ
２ａ パイプ本体
２ｂ キャップ
３ ブラケット
４ 金属平板
５ 孔
６ 孔
７ つば
８ ろう材
DESCRIPTION OF SYMBOLS 1 Pipe with bracket 2 Pipe 2a Pipe body 2b Cap 3 Bracket 4 Metal flat plate 5 Hole 6 Hole 7 Brim 8 Brazing material
Claims (2)
前記バーリング加工孔に前記パイプを通し、
前記バーリング加工孔のつばを、外方から中心に向かってかしめて、前記ブラケットと前記パイプとを仮固定し、
仮固定された前記ブラケットと前記パイプとをろう付けして本固定する、ブラケット付パイプの製造方法において、
前記つばの外周の半円弧に接触するかしめ刃部を有する固定かしめ刃と、前記つばの外周の半円弧に内接する、円弧と直線とで形成されたかしめ刃部を有するスライドかしめ刃とを、前記つばを挟んで突き合わせるかしめ装置によりかしめることにより、前記ブラケットと前記パイプとを仮固定するブラケット付パイプの製造方法。 Form a burring hole with a diameter larger than the outer diameter of the pipe through which the pipe passes through the plate-shaped bracket
Pass the pipe through the burring hole,
Caulking the flange of the burring hole from the outside toward the center, temporarily fixing the bracket and the pipe,
You present fix said pipe and provisionally fixed the bracket brazed, in pipe manufacturing method with bracket,
A fixed caulking blade having a caulking blade portion that contacts a semicircular arc on the outer periphery of the collar, and a slide caulking blade having a caulking blade portion formed by an arc and a straight line that is inscribed in the semicircular arc on the outer periphery of the collar; wherein by caulking the caulking device to match across the flange, said bracket and said pipe and a method of manufacturing a bracket with a pipe to temporarily fix.
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