JP4157697B2

JP4157697B2 - Method of welding cylindrical body by rotary friction welding device

Info

Publication number: JP4157697B2
Application number: JP2001354826A
Authority: JP
Inventors: 清純佐藤
Original assignee: Sekisui Jushi Corp
Current assignee: Sekisui Jushi Corp
Priority date: 2001-11-20
Filing date: 2001-11-20
Publication date: 2008-10-01
Anticipated expiration: 2021-11-20
Also published as: JP2003154468A

Description

【０００１】
【発明の属する技術分野】
本発明は、二個の筒状体を直列に溶着するための回転摩擦溶着装置による筒状体の溶着方法に関するものである。
【０００２】
【従来の技術】
従来、二個の部材を直列に溶着するための回転摩擦溶着装置としては、二個の部材を直列に配置すると共に互いの溶着面を密接させ、一方の部材を固定すると共に、他方の部材の外周面にチャックを締めつけ、該チャックを回転させることによりその部材を固定側の部材に対して回転させ、その回転による摩擦熱で両溶着面を溶着させる回転摩擦溶着装置がある。
【０００３】
【発明が解決しようとする課題】
しかしながら、溶着する部材が筒状体の場合、この従来の回転摩擦溶着装置によって、筒状体同志を直列に溶着しようとすると、筒状体は変形しやすいことから、回転側の筒状体にチャックを強く締め過ぎると該筒状体が変形し、突き合わせた接合面が均一に当たらなくなって溶着強度が低下し、逆に弱すぎると筒状体がスリップし、これまた溶着強度が低下する。かように筒状体の場合は、チャックの締め加減によって溶着強度が大きく影響することから、安定した溶着強度が得られにくい。
【０００４】
又回転側の筒状体に比べて、固定側の筒状体が極めて長尺の場合は、筒状体は変形しやすいことから、固定側の筒状体が不安定となり、回転側の筒状体に対するチャックの締めつけが良好であったとしても、固定側の筒状体に起因して溶着強度の低下が起こることから、この点においても安定した溶着強度が得られにくい。
【０００５】
そこで本発明は、前記の如き問題点を解消し、筒状体同志を直列に溶着するに際し、安定した溶着強度が得られる回転摩擦溶着装置による筒状体の溶着方法を提供せんとするものである。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、本発明は次のような構成としている。
すなわち本発明に係る回転摩擦溶着装置による筒状体の溶着方法は、固定側の筒状体と回転側の筒状体とを直列に配置して、固定側の筒状体の端部に回転側の筒状体を被せると共にその回転側の筒状体の端部に設けられた挿入部が固定側の筒状体内に挿入され、この回転側の筒状体の挿入部の外周面と固定側の筒状体の内周面とを溶着面として、互いの溶着面を密接させ、固定側の筒状体に対して回転側の筒状体を、回転側の筒状体の外周に締めつけたチャックによって回転させることにより、その回転の摩擦熱で両溶着面を溶着させる回転摩擦溶着装置による筒状体の溶着方法であって、前記回転摩擦溶着装置は、基端が軸受けに軸着され、固定側の筒状体内に挿入される芯部と、その芯部の先端に設けられ、回転側の筒状体の内形に対応した外形を有し、該筒状体内に挿入される保形部とを備えた回転側の筒状体の回転に対応して回転可能な芯金と、固定側の筒状体の外周面を挟圧し、該筒状体を固定するクランプとを備え、芯金の保形部を回転側の筒状体に挿入した後、当該回転側の筒状体の外周に、当該回転側の筒状体を回転させるチャックを締め付けるようにしたことを特徴とするものである。
【０００７】
本発明によれば、回転側の筒状体の内形に対応した外形を有する芯金の保形部が、回転側の筒状体内に挿入されるので、該筒状体の外周をチャックにより強く締めつけても、該筒状体の変形が防止されること、又前記筒状体が設けられた芯金が回転側の筒状体の回転に対応して回転すると共に該芯金は芯部の基端が軸受けに軸着されているので、固定側の筒状体に対する回転側の筒状体の芯振れが防止されること等から、回転側の筒状体の回転時において、互いの接合面が均一に突き合わされ、安定した溶着強度が得られる。
【０００８】
【発明の実施の形態】
以下本発明の実施の形態について図を参照にして詳細に説明する。
まず図１は本発明に係る回転摩擦溶着装置の実施の一形態を示す正面図、図２はその主要部の断面図、図３は本発明に係る回転摩擦溶着装置による溶着物の一形態を示す正面図である。
【０００９】
図面において、１は固定側の筒状体、２は回転側の筒状体、３は前記固定側の筒状体１と回転側の筒状体２とを直列に配置して溶着する回転摩擦溶着装置である。
【００１０】
図３の如く、固定側の筒状体１は、柱状であって、この固定側の筒状体１の端部にキャップ状の回転側の筒状体２が被さると共にその端部に設けられた挿入部２１が固定側の筒状体１内に挿入され、互いに密接されるこの回転側の筒状体２の挿入部２１の外周面と固定側の筒状体１の内周面とを溶着面２２，１１として、両筒状体１，２が前記回転摩擦溶着装置３により溶着される。尚、回転側の筒状体２の溶着面２２は、周方向のリブ２３を適宜間隔を開けて複数設け、溶着効果を高めている。
【００１１】
上記例示の固定側の筒状体１と回転側の筒状体２は、図３の如く、外周方向に反射テープＡが貼着された道路の車線分離に用いられる柱状の道路標識における標識本体１ａと、キャップ２ａとして使用されるものであって、このキャップ２ａが溶着された標識本体１ａを固定側の筒状体１として、さらにその下端に、路面に設置するためのアンカーボルトＢが下方に突設された筒状体からなる台座２ｂを回転側の筒状体２として溶着すれば、柱状の道路標識Ｃを好適に組み立てることができる。
【００１２】
回転摩擦溶着装置３において、４は芯金であって、固定側の筒状体１内に挿入される芯部４１の先端に保形部４２が設けられ、該保形部４２は回転側の筒状体２の内形に対応した外形を有し、該筒状体２内に挿入されるようになされている。
【００１３】
５は、前記芯部４１の基端を回動可能に軸着する軸受けである。そして回転側の筒状体２が回転すると、この回転側の筒状体２の内形に対応した外形の保形部４２によって、芯金４に回転力が付与され、芯金４の芯部４１の基端が軸受け５に支えられて回転する。前記芯金４を構成する芯部４１と保形部４２とは分離不可能に一体的されていてもよいし、別体で作成されたものが、回転の際に結合一体化されるようになされていてもよい。
【００１４】
６は、芯金４の芯部４１を挿入した固定側の筒状体１の外周面を挟圧し、該筒状体１を前記回転側の筒状体２に対して固定するクランプであり、開閉可能且つ回転側の筒状体２の方向に進退可能となされている。筒状体１を挟圧するこのクランプ６の内面は、固定側の筒状体１が回転しないように滑り止めの弾性体等を取付けるのが好ましい。
【００１５】
７は回転側の筒状体２の外周を締めつけるチャックであり、７１はこのチャック７を回転させるモーターを含む回転装置である。回転装置７１には、溶着が完了した際に、回転を瞬時に停止させる停止機構を有している。
【００１６】
次にこの回転摩擦溶着装置３による溶着作業の手順を説明する。まず、固定側に配置する筒状体１に芯金４の芯部４１を挿入する。次に芯金４の先端の保形部４２に回転側の筒状体２を被せると共に、固定側の筒状体１内に該筒状体２の挿入部２１を挿入し、固定側の筒状体１の溶着面１１と回転側の筒状体２の溶着面２２とを密接させる。尚、固定側の筒状体１と回転側の筒状体２との突き合わせ面１２，２４を溶着させたくない場合は、溶着面１１，２２の密接状態において、突き合わせ面１２，２４を密接させず、０．５〜１ｍｍ程度の隙間を開けた状態にしておく。
【００１７】
しかる後、回転側の筒状体２にチャック７を締めつけると共に、固定側の筒状体１の外周をクランプ６で挟圧し、固定側の筒状体１を固定する。
【００１８】
次に回転装置７１を駆動し、チャック７を回転させて回転側の筒状体２を回転させる。この回転側の筒状体２の回転時においては、芯金４も連れまいして回転するので、回転側の筒状体２は、固定側の筒状体１に対して芯振れを起こすことなく回転する。この回転によって、固定側の筒状体１の溶着面１１と回転側の筒状体の溶着面２とが摩擦し、摩擦熱によって両溶着面１１，２２の溶着が行われると共に、設定回転時間後、停止機構によって回転は瞬時に停止される。
【００１９】
尚、固定側の筒状体１と回転側の筒状体２との突き合わせ面１２，２４を密接させていない場合は、前記溶着面１１，２２が固化しない間に、クランプ６を回転側の筒状体２方向に移動させることにより、固定側の筒状体１の突き合わせ面１２を回転側の筒状体２の突き合わせ面２４に密接させる。かようにすれば、溶着面１１，２２のみが溶着され、突き合わせ面１２，２４が溶着されないので、突き合わせ面１２，２４から溶着によるバリが外部にはみ出すことがない。
【００２０】
チャック７の回転数は、溶着すべき筒状体１，２の材質、すなわち軟質か硬質かによって異なるため、インバーター制御によって変えるのが好ましく、又回転時間についても同様であり、タイマーにより制御するのが好ましい。
【００２１】
溶着が完了すると、チャック７を外すと共に、クランプ６を開放し、溶着された両筒状体１，２を取り出せば、溶着作業は完了する。
【００２２】
本発明に係る回転摩擦溶着装置３は、上記例示の柱状の道路標識の組み立て以外においても、筒状体同志の溶着に広く使用されるものである。
【００２３】
【発明の効果】
本発明によれば、溶着時における溶着物の変形や芯振れが防止され、安定した溶着強度が得られる。
【図面の簡単な説明】
【図１】本発明に係る回転摩擦溶着装置の実施の一形態を示す正面図である。
【図２】図１の主要部の断面図である。
【図３】本発明に係る回転摩擦溶着装置による溶着物の一形態を示す正面図である。
【符号の説明】
１固定側の筒状体
１１溶着面
１２突き合わせ面
２回転側の筒状体
２１挿入部
２２溶着面
２３リブ
２４突き合わせ面
３回転摩擦溶着装置
４芯金
４１芯部
４２保形部
５軸受け
６クランプ
７チャック
７１回転装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for welding cylindrical bodies by a rotary friction welding apparatus for welding two cylindrical bodies in series.
[0002]
[Prior art]
Conventionally, as a rotary friction welding apparatus for welding two members in series, the two members are arranged in series, the welding surfaces are brought into close contact with each other, one member is fixed, and the other member is fixed. There is a rotary friction welding apparatus in which a chuck is fastened to an outer peripheral surface, the member is rotated with respect to a fixed member by rotating the chuck, and both welding surfaces are welded by frictional heat generated by the rotation.
[0003]
[Problems to be solved by the invention]
However, when the member to be welded is a cylindrical body, the cylindrical body tends to deform when the conventional rotary friction welding apparatus tries to weld the cylindrical bodies in series. If the chuck is tightened too much, the cylindrical body will be deformed, and the bonded surfaces will not be evenly contacted and the welding strength will decrease. Conversely, if it is too weak, the cylindrical body will slip, and the welding strength will also decrease. Thus, in the case of a cylindrical body, since the welding strength is greatly affected by the tightening of the chuck, it is difficult to obtain a stable welding strength.
[0004]
In addition, when the fixed-side cylindrical body is extremely long compared to the rotating-side cylindrical body, the cylindrical body is easily deformed, so that the fixed-side cylindrical body becomes unstable and the rotating-side cylindrical body becomes unstable. Even if the chuck is firmly clamped to the cylindrical body, the welding strength is lowered due to the fixed cylindrical body, and it is difficult to obtain a stable welding strength in this respect.
[0005]
Accordingly, the present invention is intended to solve the above-described problems and provide a method of welding a cylindrical body by a rotary friction welding apparatus that can obtain a stable welding strength when welding cylindrical bodies in series. is there.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
That is, the cylindrical body welding method by the rotary friction welding apparatus according to the present invention is arranged such that the fixed-side cylindrical body and the rotary-side cylindrical body are arranged in series and rotated at the end of the fixed-side cylindrical body. insertion portion together provided at an end portion of the cylindrical body of the rotating side when putting the tubular body side is inserted into the cylindrical body of the stationary side, and the outer peripheral surface of the insertion portion of the cylindrical body of the rotation-side Using the inner peripheral surface of the fixed-side cylindrical body as the welding surface, the welding surfaces are brought into close contact with each other, and the rotating-side cylindrical body is placed on the outer periphery of the rotating-side cylindrical body with respect to the fixed-side cylindrical body. A method of welding a cylindrical body by a rotary friction welding device in which both welding surfaces are welded by the frictional heat of rotation by rotating with a tightened chuck, wherein the base end of the rotary friction welding device is attached to a bearing. Corresponding to the inner shape of the cylindrical body on the rotation side provided at the tip of the core part and the core part inserted into the cylindrical body on the fixed side A core metal that can rotate in response to the rotation of the cylindrical body on the rotating side, and the outer peripheral surface of the cylindrical body on the fixed side. A clamp that clamps and fixes the cylindrical body, and after inserting the shape-retaining portion of the core metal into the cylindrical body on the rotation side, on the outer periphery of the cylindrical body on the rotation side, The chuck for rotating the body is tightened.
[0007]
According to the present invention, the shape retaining portion of the metal core having the outer shape corresponding to the inner shape of the cylindrical body on the rotation side is inserted into the cylindrical body on the rotation side. Even if it is strongly tightened, deformation of the cylindrical body is prevented, and the cored bar provided with the cylindrical body rotates corresponding to the rotation of the cylindrical body on the rotation side, and the cored bar is a core part. Since the center end of the rotating side cylindrical body relative to the fixed side cylindrical body is prevented, the center end of the rotating side cylindrical body is prevented from rotating. The joint surfaces are abutted uniformly, and a stable welding strength is obtained.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, FIG. 1 is a front view showing an embodiment of a rotary friction welding apparatus according to the present invention, FIG. 2 is a cross-sectional view of the main part thereof, and FIG. 3 is an embodiment of a welded product by the rotary friction welding apparatus according to the present invention. FIG.
[0009]
In the drawings, reference numeral 1 denotes a fixed-side cylindrical body, 2 denotes a rotating-side cylindrical body, and 3 denotes rotational friction in which the fixed-side cylindrical body 1 and the rotating-side cylindrical body 2 are arranged in series and welded. It is a welding device.
[0010]
As shown in FIG. 3, the fixed-side cylindrical body 1 has a columnar shape, and the end of the fixed-side cylindrical body 1 covers the cap-shaped rotating-side cylindrical body 2 and is provided at the end thereof. The outer peripheral surface of the insertion portion 21 of the cylindrical member 2 on the rotating side and the inner peripheral surface of the cylindrical member 1 on the fixed side are inserted into the cylindrical member 1 on the fixed side and are in close contact with each other. As the welding surfaces 22 and 11, both cylindrical bodies 1 and 2 are welded by the rotary friction welding device 3. In addition, the welding surface 22 of the cylindrical body 2 on the rotating side is provided with a plurality of circumferential ribs 23 at appropriate intervals to enhance the welding effect.
[0011]
As shown in FIG. 3, the fixed-side cylindrical body 1 and the rotating-side cylindrical body 2 shown in the above example are labeled bodies in columnar road signs used for road lane separation with a reflective tape A attached in the outer peripheral direction. 1a and a cap body 2a used as a cap 2a. The fixed body 1a is a cylindrical body 1 on the fixed side, and the anchor bolt B for installation on the road surface is provided at the lower end thereof. If the pedestal 2b made of a cylindrical body projecting from the base is welded as the cylindrical body 2 on the rotating side, the columnar road sign C can be suitably assembled.
[0012]
In the rotary friction welding apparatus 3, reference numeral 4 denotes a cored bar, and a shape retaining part 42 is provided at the tip of a core part 41 inserted into the cylindrical body 1 on the fixed side. It has an outer shape corresponding to the inner shape of the cylindrical body 2 and is inserted into the cylindrical body 2.
[0013]
Reference numeral 5 denotes a bearing for pivotally mounting the base end of the core portion 41 so as to be rotatable. When the cylindrical body 2 on the rotation side rotates, a rotational force is applied to the core metal 4 by the shape retaining portion 42 having an outer shape corresponding to the inner shape of the cylindrical body 2 on the rotation side. The base end of 41 is supported by the bearing 5 and rotates. The core part 41 and the shape-retaining part 42 constituting the cored bar 4 may be integrated so as not to be separable, or a separately prepared one may be combined and integrated during rotation. May have been made.
[0014]
6 is a clamp that clamps the outer peripheral surface of the fixed tubular body 1 into which the core portion 41 of the metal core 4 is inserted, and fixes the tubular body 1 to the rotating tubular body 2; It can be opened and closed and can be moved back and forth in the direction of the cylindrical body 2 on the rotation side. It is preferable to attach an anti-slip elastic body or the like to the inner surface of the clamp 6 that clamps the cylindrical body 1 so that the fixed-side cylindrical body 1 does not rotate.
[0015]
7 is a chuck for tightening the outer periphery of the cylindrical body 2 on the rotation side, and 71 is a rotating device including a motor for rotating the chuck 7. The rotating device 71 has a stop mechanism that instantaneously stops the rotation when the welding is completed.
[0016]
Next, the procedure of welding work by this rotary friction welding apparatus 3 will be described. First, the core part 41 of the cored bar 4 is inserted into the cylindrical body 1 arranged on the fixed side. Next, the cylindrical body 2 on the rotation side is covered with the shape retaining portion 42 at the tip of the cored bar 4, and the insertion portion 21 of the cylindrical body 2 is inserted into the cylindrical body 1 on the fixed side, thereby The welding surface 11 of the cylindrical body 1 and the welding surface 22 of the cylindrical body 2 on the rotating side are brought into close contact with each other. If it is not desired to weld the butted surfaces 12 and 24 between the fixed-side tubular body 1 and the rotating-side tubular body 2, the butted surfaces 12 and 24 are brought into close contact with each other while the welded surfaces 11 and 22 are in close contact with each other. First, leave a gap of about 0.5 to 1 mm.
[0017]
Thereafter, the chuck 7 is fastened to the cylindrical body 2 on the rotation side, and the outer periphery of the cylindrical body 1 on the fixed side is clamped by the clamp 6 to fix the cylindrical body 1 on the fixed side.
[0018]
Next, the rotating device 71 is driven to rotate the chuck 7 and rotate the cylindrical body 2 on the rotating side. At the time of rotation of the cylindrical body 2 on the rotating side, the cored bar 4 is also rotated, so that the cylindrical body 2 on the rotating side causes center runout with respect to the cylindrical body 1 on the fixed side. Rotate without. By this rotation, the welding surface 11 of the fixed-side tubular body 1 and the welding surface 2 of the rotating-side tubular body are rubbed, and the welding surfaces 11 and 22 are welded by frictional heat, and the set rotation time Thereafter, the rotation is instantaneously stopped by the stop mechanism.
[0019]
If the butted surfaces 12 and 24 of the fixed-side cylindrical body 1 and the rotary-side cylindrical body 2 are not in intimate contact, the clamp 6 is connected to the rotary-side while the welding surfaces 11 and 22 are not solidified. By moving in the direction of the cylindrical body 2, the abutting surface 12 of the fixed-side cylindrical body 1 is brought into close contact with the abutting surface 24 of the rotating-side cylindrical body 2. By doing so, only the welding surfaces 11 and 22 are welded, and the butted surfaces 12 and 24 are not welded. Therefore, burrs due to welding do not protrude from the butted surfaces 12 and 24 to the outside.
[0020]
Since the rotation speed of the chuck 7 differs depending on the material of the cylindrical bodies 1 and 2 to be welded, that is, soft or hard, it is preferable to change by the inverter control, and the rotation time is the same and is controlled by the timer. Is preferred.
[0021]
When the welding is completed, the chuck 7 is removed, the clamp 6 is opened, and the welded cylindrical bodies 1 and 2 are taken out, so that the welding operation is completed.
[0022]
The rotary friction welding apparatus 3 according to the present invention is widely used for welding of cylindrical bodies other than the assembly of the columnar road signs illustrated above.
[0023]
【The invention's effect】
According to the present invention, deformation and core runout of the welded product at the time of welding are prevented, and stable welding strength can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a rotary friction welding apparatus according to the present invention.
FIG. 2 is a cross-sectional view of a main part of FIG.
FIG. 3 is a front view showing one embodiment of a welded product by the rotary friction welding apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed side cylindrical body 11 Welding surface 12 Abutting surface 2 Rotating side cylindrical body 21 Insertion part 22 Welding surface 23 Rib 24 Abutting surface 3 Rotating friction welding apparatus 4 Core metal 41 Core part 42 Shape retaining part 5 Bearing 6 Clamp 7 Chuck 71 Rotating device

Claims

The fixed-side cylindrical body and the rotating-side cylindrical body are arranged in series so that the end of the fixed-side cylindrical body is covered with the rotating-side cylindrical body and the end of the rotating-side cylindrical body Are inserted into the fixed-side cylindrical body, and the outer peripheral surface of the insertion portion of the rotating-side cylindrical body and the inner peripheral surface of the fixed-side cylindrical body are welded to each other. By rotating the cylindrical body on the rotating side against the fixed cylindrical body with a chuck fastened to the outer periphery of the rotating cylindrical body, the two welding surfaces are brought together by the frictional heat of the rotation. A welding method of a cylindrical body by a rotating friction welding device to be welded, the rotating friction welding device comprising: a core portion whose base end is attached to a bearing and inserted into a fixed cylindrical body; and the core portion Provided on the tip of the rotating side, and has an outer shape corresponding to the inner shape of the cylindrical body on the rotating side, and a shape-retaining portion inserted into the cylindrical body. A core metal that can rotate in response to the rotation of the cylindrical body, and a clamp that clamps the outer peripheral surface of the cylindrical body on the fixed side and fixes the cylindrical body, The cylindrical body is welded by a rotary friction welding apparatus, wherein a chuck for rotating the rotating-side cylindrical body is fastened to the outer periphery of the rotating-side cylindrical body after being inserted into the cylindrical body. Method.