JP2018136014A - Connection structure of pipe with different diameter - Google Patents
Connection structure of pipe with different diameter Download PDFInfo
- Publication number
- JP2018136014A JP2018136014A JP2017032853A JP2017032853A JP2018136014A JP 2018136014 A JP2018136014 A JP 2018136014A JP 2017032853 A JP2017032853 A JP 2017032853A JP 2017032853 A JP2017032853 A JP 2017032853A JP 2018136014 A JP2018136014 A JP 2018136014A
- Authority
- JP
- Japan
- Prior art keywords
- diameter pipe
- pipe
- small
- different diameter
- pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
本発明は、例えば大径パイプと小径パイプとを接合してなるステアリングハンガービームなどの金属製パイプの接合部の構造に関する。 The present invention relates to a structure of a joint portion of a metal pipe such as a steering hanger beam formed by joining a large diameter pipe and a small diameter pipe, for example.
自動車や自動二輪車のフレームには２本のパイプを接合することで、軽量化と強度維持を図ることが行われている。また、全体形状が複雑なパイプユニットを複数のパイプに分割して製造し、製造後に接合することも行われている。 It is attempted to reduce the weight and maintain the strength by joining two pipes to the frame of an automobile or a motorcycle. In addition, a pipe unit having a complicated overall shape is manufactured by being divided into a plurality of pipes and bonded after the manufacturing.
例えば特許文献１には、２つの管体を連結する際に間に環状のアダプタを介在させ、このアダプタの両端部に形成した挿入部にそれぞれの管体の端部を挿入することで２つの管体を連結する構造になっている。 For example, in Patent Document 1, an annular adapter is interposed between two tubular bodies, and two end portions of the respective tubular bodies are inserted into insertion portions formed at both ends of the adapter. It has a structure that connects pipes.
特許文献２には径の異なる２本のパイプを連結したインパネリインフォースメントが開示され、２本のパイプは小径パイプの外周面と大径パイプの内周面との間に円筒形の連結具を介在させ、この連結具を含め大径パイプ及び小径パイプにボルトを貫通して止着している。 Patent Document 2 discloses an instrument panel reinforcement in which two pipes having different diameters are connected, and the two pipes have a cylindrical connector between the outer peripheral surface of the small diameter pipe and the inner peripheral surface of the large diameter pipe. A bolt is passed through and fixed to a large-diameter pipe and a small-diameter pipe including this connector.
特許文献３はパイプの接合に関するものではないが、公報の図１０（Ａ）にパイプの一端部を圧潰して扁平状とし、この扁平状とした部分に締め付け孔を形成することが開示されている。 Patent Document 3 is not related to pipe joining, but FIG. 10A of the publication discloses that one end of the pipe is crushed into a flat shape, and a tightening hole is formed in the flat portion. Yes.
特許文献１に開示される接合構造にあっては、部品点数が１つ増えてしまう不利があり、また接合部に負荷がかかりやすく強度的にも問題がある。
特許文献２に開示される接合構造にあっては、円筒形の連結具を間に挟んで、大径パイプと小径パイプをボルト止めするため、部品点数が多くなり且つ接合作業も面倒である。
特許文献３には、パイプを接合する構造は開示されていないため、パイプの端部を圧潰して扁平状にしてもこの扁平状部分と接合との関連性は何ら見出すことはできない。
In the joint structure disclosed in Patent Document 1, there is a disadvantage that the number of parts increases by one, and a load is easily applied to the joint, and there is a problem in strength.
In the joining structure disclosed in Patent Document 2, the large-diameter pipe and the small-diameter pipe are bolted with a cylindrical connector interposed therebetween, so that the number of parts is increased and the joining operation is troublesome.
Since a structure for joining pipes is not disclosed in Patent Document 3, even if the ends of the pipes are crushed and flattened, no relation between the flat part and the joints can be found.
また、異径パイプ同士の接合部にテーパ状部を形成した場合、テーパ状部と直線部との境界部に応力が集中しやすくなるが、この応力集中箇所についての改善については何れの特許文献も何ら提案していない。 In addition, when a tapered portion is formed at the joint between different diameter pipes, stress tends to concentrate on the boundary portion between the tapered portion and the straight portion. No suggestion.
上記の課題を解決するため、本発明に係る異径パイプの接合構造は、小径パイプの端部の外周面に大径パイプの内側面が挿入して重ねられる直線部と、この直線部と前記大径パイプ本体との間を繋ぐテーパ部と、前記直線部及びテーパ部をプレス成形する際に余肉となる部分を金型間で圧潰して成形されるフランジ部からなる。 In order to solve the above-described problem, the joint structure for different diameter pipes according to the present invention includes a straight portion in which an inner surface of a large diameter pipe is inserted and overlapped with an outer peripheral surface of an end portion of a small diameter pipe, It consists of a taper part that connects between the large-diameter pipe body and a flange part that is formed by crushing a surplus part between molds when the linear part and the taper part are press-molded.
大径パイプの本体部の形状を断面楕円形とし、この楕円形の長軸方向と前記フランジ部の面とが平行とすることで、楕円形の長軸方向から加えられる外力に対しての抗力が大きくなる。したがって、例えばステアリングハンガービームとして用いる場合には、楕円形の長軸方向が車体の前後方向となるように設計するのが好ましい。 尚、大径パイプ及び小径パイプの径寸法、断面形状については通常の円形パイプなど任意である。 The shape of the main body of the large-diameter pipe is elliptical in cross section, and the resistance to the external force applied from the major axis of the ellipse is made parallel to the major axis of the ellipse and the surface of the flange. Becomes larger. Therefore, for example, when used as a steering hanger beam, it is preferable to design the elliptical long axis direction to be the longitudinal direction of the vehicle body. The diameter and cross-sectional shape of the large diameter pipe and the small diameter pipe are arbitrary such as a normal circular pipe.
本発明に係る異径パイプの接合構造によれば、プレス成形によってパイプを圧潰する際に生じる余肉を有効利用して、応力を分散することができる。
特に、衝突時に加わる外力の作用方向とフランジ部とが平行になるようにすることで、強度を大幅に高めることができる。
According to the joint structure of different diameter pipes according to the present invention, it is possible to disperse the stress by effectively utilizing the surplus generated when the pipe is crushed by press molding.
In particular, the strength can be greatly increased by making the acting direction of the external force applied at the time of collision parallel to the flange portion.
また、本発明に係る異径パイプの接合構造とすることで、１工程で達成することができ、大径パイプと小径パイプとの外径差が大きいほどコストダウンを図ることができる。 Moreover, by using the joint structure for different diameter pipes according to the present invention, this can be achieved in one step, and the cost can be reduced as the difference in the outer diameter between the large diameter pipe and the small diameter pipe increases.
以下に本発明の実施の形態を添付図面に基づいて説明する。実施例ではステアリングハンガービームの接合部を例にとって説明する。このステアリングハンガービームは運転席側の強度部材として用いる大径パイプと助手席側の小径パイプを接合している。 Embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiment, a description will be given by taking as an example a joint portion of a steering hanger beam. The steering hanger beam joins a large-diameter pipe used as a strength member on the driver's seat side and a small-diameter pipe on the passenger seat side.
前記大径パイプとしては、例えば外径７０ｍｍ、厚さ１．０または２．０ｍｍのパイプを用い、前記小径パイプとしては、例えば外径３１．８ｍｍ、厚さ１．０ｍｍのパイプを用いる。 For example, a pipe having an outer diameter of 70 mm and a thickness of 1.0 or 2.0 mm is used as the large diameter pipe, and a pipe having an outer diameter of 31.8 mm and a thickness of 1.0 mm is used as the small diameter pipe, for example.
成形の手順としては、先ず図１に示すように、金型１、２間に大径パイプ３をセットする。金型１、２には半筒状凹部とテーパ状半筒状凹部とが連続した成形キャビティ１ａ、２ａが形成されている。 As a molding procedure, first, as shown in FIG. 1, the large-diameter pipe 3 is set between the molds 1 and 2. Molds 1 and 2 are formed with molding cavities 1a and 2a in which a semicylindrical recess and a tapered semicylindrical recess are continuous.
そして、大径パイプ３の先端側からポンチ４を挿入し、この状態で金型１、２の成形キャビティ１ａ、２ａ間で大径パイプ３をプレス成形する。プレス成形の結果、図２（ａ）に示すように、大径パイプの先端部には直線部５、テーパ部６及びフランジ部７が形成される。 And the punch 4 is inserted from the front end side of the large diameter pipe 3, and the large diameter pipe 3 is press-molded between the molding cavities 1a and 2a of the molds 1 and 2 in this state. As a result of press molding, as shown in FIG. 2A, a straight portion 5, a tapered portion 6 and a flange portion 7 are formed at the tip of the large diameter pipe.
図２（ｂ）に示すように、直線部５は大径パイプ３と小径パイプ８を結合する部分で、直線部５の内径は小径パイプ８の外径より若干大きくされ、挿入後に小径パイプ８の端部の外周面に直線部５の内側面が重なり更に大径パイプ３の先端部と小径パイプ８の外周面とで形成される段部は溶接することで大径パイプ３と小径パイプ８は接合される。 As shown in FIG. 2 (b), the straight portion 5 is a portion connecting the large diameter pipe 3 and the small diameter pipe 8, and the inner diameter of the straight portion 5 is slightly larger than the outer diameter of the small diameter pipe 8, and the small diameter pipe 8 is inserted after insertion. The inner surface of the straight portion 5 is overlapped with the outer peripheral surface of the end portion of the large diameter pipe 3, and the step portion formed by the distal end portion of the large diameter pipe 3 and the outer peripheral surface of the small diameter pipe 8 is welded to thereby weld the large diameter pipe 3 and the small diameter pipe 8. Are joined.
テーパ部６は直線部５と大径パイプ３本体とを連続する部分であり、好ましい長さは直線部５の２倍以上である。
フランジ部７はプレス成形の際の大径パイプ３の周長余肉を金型１、２間で扁平に成形したものであり、小径箇所ほどフランジ部７の幅寸法は大きくなる。
The taper portion 6 is a portion where the straight portion 5 and the large-diameter pipe 3 main body are continuous, and the preferred length is twice or more that of the straight portion 5.
The flange portion 7 is formed by flattening the peripheral length surplus of the large-diameter pipe 3 at the time of press molding between the molds 1 and 2, and the width dimension of the flange portion 7 increases as the diameter decreases.
第３図（ａ）、（ｂ）は別実施例を示し、前記実施例では先ず大径パイプ３を成形した後に小径パイプ８を大径パイプ３の直線部５の内側に挿入するという２つの工程が必要であったが、別実施例では金型１、２間に位置させた大径パイプ３内に小径パイプ８の先端部を入れて臨ませ、更に大径パイプ３の他端側からポンチ４を挿入し、ポンチ４の先端を小径パイプ８の先端に嵌め込んだ状態で、金型１、２を閉じるようにしている。このようにすることで、ポンチを抜いてそのあとに小径パイプを挿入する２段階の工程が１回で済むようになる。 FIGS. 3 (a) and 3 (b) show another embodiment. In this embodiment, the large-diameter pipe 3 is first formed and then the small-diameter pipe 8 is inserted inside the straight portion 5 of the large-diameter pipe 3. Although the process was necessary, in another embodiment, the tip of the small-diameter pipe 8 is put in the large-diameter pipe 3 positioned between the molds 1 and 2 and the other end of the large-diameter pipe 3 is faced. The molds 1 and 2 are closed with the punch 4 inserted and the tip of the punch 4 fitted into the tip of the small-diameter pipe 8. By doing so, the two-stage process of pulling out the punch and inserting the small-diameter pipe after that is completed once.
上記では、１回のプレス成形工程で直線部５、テーパ部６及びフランジ部７を形成しているが、パイプの材質、大径パイプの形状などに応じて複数回の工程で行うようにしてもよい。 In the above, the straight part 5, the taper part 6 and the flange part 7 are formed by a single press molding process, but it is performed in a plurality of processes depending on the material of the pipe, the shape of the large diameter pipe, etc. Also good.
図４（ａ）〜（ｄ）は別実施例を示し、このうち図４（ａ）に示す実施例は、直線部５の断面形状を楕円形状となるようにしている。楕円形状とした場合には楕円の長軸方向から作用する外力に対して変形しにくくなる。 4 (a) to 4 (d) show another embodiment, and in the embodiment shown in FIG. 4 (a), the cross-sectional shape of the straight portion 5 is an elliptical shape. In the case of an elliptical shape, it is difficult to deform against an external force acting from the major axis direction of the ellipse.
図４（ｂ）に示す実施例は、直線部５の断面形状を角が丸くなった四角形としている。このように四角形とすることで車体の前後方向及び上下方向からから作用する外力にたいして変形しにくくなる。 In the embodiment shown in FIG. 4B, the cross-sectional shape of the straight portion 5 is a quadrangle with rounded corners. Such a quadrangular shape makes it difficult to deform external forces acting from the front-rear direction and the vertical direction of the vehicle body.
図４（ｃ）に示す実施例は、直線部５の断面形状は円形であるが、大径パイプ自体を断面楕円形（長円を含む）とし、楕円の長軸方向に対する機械的強度の向上を図っている。また、この実施例では余肉を利用して形成されるフランジ部と楕円の長軸方向とが平行になるように成形しているため、長軸方向に対する機械的強度は更に向上している。また、直線部５の断面形状は楕円形状としても良い。 In the embodiment shown in FIG. 4C, the cross-sectional shape of the straight portion 5 is circular, but the large-diameter pipe itself has an elliptical cross section (including an ellipse) to improve the mechanical strength in the major axis direction of the ellipse. I am trying. Further, in this embodiment, since the flange portion formed using the surplus is formed so that the major axis direction of the ellipse is parallel, the mechanical strength in the major axis direction is further improved. Moreover, the cross-sectional shape of the linear part 5 is good also as an elliptical shape.
図４（ｄ）に示す実施例は、大径パイプに形成する直線部の位置を大径パイプの中心から偏芯させ、その結果フランジ部７を片側のみとし、且つフランジ部の面積を大きくしている。大径パイプと小径パイプとの外径差が大きい場合やレイアウトへの対応などにこの構造が有利に適用できる。 In the embodiment shown in FIG. 4 (d), the position of the straight portion formed on the large-diameter pipe is decentered from the center of the large-diameter pipe, so that the flange portion 7 is only on one side and the area of the flange portion is increased. ing. This structure can be advantageously applied when the difference in outer diameter between the large-diameter pipe and the small-diameter pipe is large, or when dealing with the layout.
実施例では直線状のステアリングハンガービームを示したが、これに限らず、異径パイプを接合して１本のパイプ製品として使用される製品の接合部構造として本発明を利用することができる。 In the embodiment, a linear steering hanger beam is shown. However, the present invention is not limited to this, and the present invention can be used as a joint structure for a product that is used as a single pipe product by joining different diameter pipes.
１、２…金型、１ａ、２ａ…成形キャビティ、３…大径パイプ、４…ポンチ、５…直線部、６…テーパ部、７…フランジ部、８…小径パイプ。
DESCRIPTION OF SYMBOLS 1, 2 ... Mold, 1a, 2a ... Molding cavity, 3 ... Large diameter pipe, 4 ... Punch, 5 ... Linear part, 6 ... Tapered part, 7 ... Flange part, 8 ... Small diameter pipe.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017032853A JP2018136014A (en) | 2017-02-24 | 2017-02-24 | Connection structure of pipe with different diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017032853A JP2018136014A (en) | 2017-02-24 | 2017-02-24 | Connection structure of pipe with different diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2018136014A true JP2018136014A (en) | 2018-08-30 |
Family
ID=63366763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017032853A Pending JP2018136014A (en) | 2017-02-24 | 2017-02-24 | Connection structure of pipe with different diameter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2018136014A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021149387A1 (en) * | 2020-01-20 | 2021-07-29 | ||
| CN114408160A (en) * | 2021-12-17 | 2022-04-29 | 海丰通航科技有限公司 | Tail stay pipe and unmanned aerial vehicle |
-
2017
- 2017-02-24 JP JP2017032853A patent/JP2018136014A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021149387A1 (en) * | 2020-01-20 | 2021-07-29 | ||
| CN114502452A (en) * | 2020-01-20 | 2022-05-13 | 住友重机械工业株式会社 | Flanged member |
| CN114502452B (en) * | 2020-01-20 | 2025-06-10 | 住友重机械工业株式会社 | Flanged component |
| CN114408160A (en) * | 2021-12-17 | 2022-04-29 | 海丰通航科技有限公司 | Tail stay pipe and unmanned aerial vehicle |
| CN114408160B (en) * | 2021-12-17 | 2023-08-29 | 海丰通航科技有限公司 | Tail support pipe and unmanned aerial vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6817382B2 (en) | Pile member | |
| JP5587698B2 (en) | Bumper device for vehicle | |
| JPH07277119A (en) | Roll bar for cars | |
| GB2455443A (en) | Pipe member and method of manufacturing the same | |
| US6585331B2 (en) | Tubular axle beam | |
| CN101983138A (en) | Link part for vehicle | |
| CN104349918B (en) | Connected structure, connected component with connected structure, and method of manufacturing connected component with connected structure | |
| JP5352155B2 (en) | Method for manufacturing hollow tube | |
| CN107813874A (en) | The manufacture method of reinforcement of instrument panel and reinforcement of instrument panel | |
| US11072373B2 (en) | Vehicle structural member and method for producing same | |
| JP2018136014A (en) | Connection structure of pipe with different diameter | |
| JP2003034106A (en) | Axle housing and method of manufacturing the same | |
| JP2013505869A (en) | Reinforcing structure for door pillar of passenger car and manufacturing method thereof | |
| JP3549750B2 (en) | Forming method of high expansion pipe and high expansion pipe | |
| JP5530168B2 (en) | Pipe member forming method | |
| JP5137237B2 (en) | Method for manufacturing vehicle suspension arm | |
| JP2009096359A (en) | Vehicular axle housing and manufacturing method thereof | |
| US7454942B2 (en) | Hollow molded part with closed cross-section and a reinforcement | |
| JP3736865B2 (en) | Instrument panel reinforcement and instrument panel manufacturing method | |
| JP2018062235A (en) | Steering support structure and steering support method | |
| JP2010241229A (en) | Integration type axle housing for automobile, and its manufacturing method | |
| JP5667519B2 (en) | Instrument panel reinforcement structure for automobiles | |
| JP2000126832A (en) | Production of vehicle body frame | |
| JP4288100B2 (en) | Suspension member | |
| JP2018043548A (en) | Instrument panel reinforcement and method for manufacturing instrument panel reinforcement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20200220 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20210203 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20210730 |