JP4883625B2

JP4883625B2 - Multistage lap bending method and apparatus for finned meander tube

Info

Publication number: JP4883625B2
Application number: JP2006356429A
Authority: JP
Inventors: 泰彦鈴木
Original assignee: Usui Co Ltd
Current assignee: Usui Co Ltd
Priority date: 2006-12-28
Filing date: 2006-12-28
Publication date: 2012-02-22
Anticipated expiration: 2026-12-28
Also published as: JP2008161922A

Description

この発明は、主に電気冷蔵庫等の家電製品や車両用熱交換器に使用するフィン付き蛇行チューブの多段重ね曲げ加工技術に係り、より詳しくは被加工フィン付きチューブを蛇行状に折曲げる動作と、その蛇行状に折曲げたフィン付き蛇行チューブを多段に相重ねる曲げ動作を一台の装置で連続してかつ精度よく行うことができるフィン付き蛇行チューブの多段重ね曲げ加工方法とその装置に関する。 TECHNICAL FIELD The present invention relates to a multi-stage lap bending technique for finned meandering tubes used mainly in home appliances such as electric refrigerators and heat exchangers for vehicles, and more specifically, an operation for bending a finned tube to be worked into a meandering shape. The present invention relates to a finned meandering tube multi-stage bending method and apparatus capable of continuously and accurately performing a bending operation for laminating the finned meandering tube in multiple stages in a single device.

従来のフィン付き蛇行チューブの多段重ね曲げ加工方法としては、被加工フィン付きチューブを蛇行状に折曲げる装置（スネーク曲げ装置）と、この蛇行状に折曲げたフィン付き蛇行チューブを折り重ねる装置（多段重ね曲げ装置）を使用する方法が一般的である。すなわち、従来の方法は、まずスネーク曲げ装置により被加工フィン付きチューブを蛇行状に折曲げ、そのスネーク曲げ終了後に多段重ね曲げ装置により順次折曲げて多段に重ねて行く方法がとられる。 As a conventional multi-stage bending method for finned serpentine tubes, there are a device for bending the finned tube in a serpentine shape (snake bending device) and a device for folding the serpentine tube with fins bent in a serpentine shape ( A method using a multi-stage bending apparatus) is generally used. That is, in the conventional method, first, a tube with a fin to be processed is bent in a meandering manner by a snake bending device, and after the snake bending is finished, the tube is sequentially bent by a multistage bending device and stacked in multiple stages.

しかし、上記した従来の多段重ね曲げ加工方法には、以下に記載する欠点があった。
(1). 被加工フィン付きチューブを蛇行状に折曲げるスネーク曲げ加工と、蛇行状に折曲げたフィン付き蛇行チューブを折り重ね加工をそれぞれ別々の装置により行うため、作業能率が悪くかつ多段曲げ加工時間が長くかかる。
(2). スネーク曲げ数が多いと被加工フィン付きチューブ端部の振りが大きくなり、曲げ速度を上げることができない上、フィン付き蛇行チューブを折重ねる時に該蛇行チューブが干渉し形状が不安定となる。
(3). スネーク曲げ加工を終えたフィン付き蛇行チューブを多段に折重ねる場合、端部から順次多段に重ね曲げ加工を施さなければならないため、多段折重ね装置はフィン付き蛇行チューブを定位置に固定する機構、上下方向に一定の間隔を保持して重ね曲げ加工する機構、蛇行チューブの位置ずれを防止する機構等を必要とし、装置が複雑である。
(4). フィンとチューブがろう付けまたは溶接されたフィン付きチューブの場合は、スネーク曲げ加工時に捻り部よりフィンが剥離したり、倒れる場合がある他、フィンに皺や亀裂が入ったり、変形や破断が生じたりする。
(5). 非ろう付けフィンの場合は、スネーク曲げ加工時に捻り部のフィンピッチが狂いフィンと本管との間に隙間が生じたりする。 However, the above-described conventional multistage lap bending method has the following drawbacks.
(1). Since the snake bending process for bending the finned tube to be processed in a serpentine form and the folding process for the meandering finned meandered tube with separate apparatuses are performed separately, the work efficiency is poor and multi-stage bending is performed. Processing time is long.
(2). If the number of snake bends is large, the swing of the end of the tube with fins to be processed will increase, and the bending speed cannot be increased. In addition, when the finned meandering tube is folded, the meandering tube interferes and the shape is unstable. It becomes.
(3). When the finned serpentine tube that has been subjected to snake bending is folded in multiple stages, the multistage folding device must place the finned serpentine tube in a fixed position because it must be bent in multiple stages sequentially from the end. The apparatus is complicated because it requires a mechanism for fixing, a mechanism for bending and bending at a constant interval in the vertical direction, a mechanism for preventing the displacement of the meandering tube, and the like.
(4). In the case of a finned tube in which the fin and the tube are brazed or welded, the fin may be peeled off from the twisted part during the snake bending process, or the fin may be cracked or deformed. Or breakage.
(5). In the case of non-brazed fins, the fin pitch of the twisted part is incorrect during snake bending, and a gap is created between the fin and the main pipe.

そこで本発明者らは、上記した従来技術の欠点を解消するために、単一の装置でスネーク曲げと多段曲げ加工を同時にかつ連続して行うことができるとともに、高速曲げ加工を精度よく行うことが可能で曲げ加工能率および生産性を大幅に向上できるフィン付き蛇行チューブの多段重ね曲げ加工技術を先に提案した（特許文献１参照）。 Therefore, the present inventors can simultaneously and continuously perform snake bending and multi-stage bending with a single device in order to eliminate the above-described drawbacks of the prior art, and perform high-speed bending with high accuracy. Has been proposed first (see Patent Document 1), which is a multistage lap bending technique for a meandering tube with fins that can significantly improve the bending efficiency and productivity.

この多段重ね曲げ加工技術は、被加工フィン付きチューブのスネーク曲げ加工方法として、左右一対の曲げロールの間に被加工フィン付きチューブを通し、この左右の曲げロールの各回転軸を同心としてそれぞれの曲げロールの回りを回動する回動・昇降式押圧ダイにて前記被加工フィン付きチューブを一定長さずつ交互にＵ字形に曲げ加工していくもので、被加工フィン付きチューブを管軸線方向に所定長さ間欠送りしながら、当該フィン付きチューブを同一水平面上で左右一対の曲げロールに沿って回動・昇降式押圧ダイにて交互にＵ字形に曲げ加工してフィン付き蛇行チューブを形成し、１段分のフィン付き蛇行チューブ曲げ加工終了時、被加工フィン付きチューブを管軸線方向に一定長さ送った後、１段目のフィン付き蛇行チューブを上方に起して傾斜保持した状態で前記回動・昇降式押圧ダイにて被加工フィン付きチューブをＵ字形に曲げ加工して２段目に連続する立上り部を形成し、次いで該１段目のフィン付き蛇行チューブを水平状態にまでさらに回動し、再び被加工フィン付きチューブを管軸線方向に所定長さ間欠送りしながら、当該フィン付きチューブを同一水平面上で左右一対の曲げロールに沿って回動・昇降式押圧ダイにて交互にＵ字形に曲げ加工して２段目のフィン付き蛇行チューブを前記１段目のフィン付き蛇行チューブのほぼ真下に相重なるように形成し、以後前記と同様の動作を繰返してフィン付き蛇行チューブを連続して多段に曲げ加工する方法であり、スネーク曲げ加工と、次の段に連続する立上り部の形成および次段のスネーク曲げ加工を順次連続して繰返すことにより、フィン付き蛇行チューブが自動的に多段に重ねられるようになっている。
特開平１０−５８０４９号公報 This multi-stage lap bending technology is a method for snake bending of a tube with a work fin, passing a tube with a work fin between a pair of left and right bending rolls, and each rotating shaft of the left and right bending rolls is concentric. The tube with workpiece fin is bent into a U-shape alternately by a fixed length by a rotary / lifting pressure die that rotates around a bending roll. The finned tube is bent into a U shape alternately with a rotating / lifting pressure die along a pair of left and right bending rolls on the same horizontal plane while intermittently feeding to a predetermined length to form a meandering tube with fins At the end of bending of the first level finned serpentine tube, the first level finned serpentine tube is fed after a certain length of the processed finned tube is sent in the tube axis direction. The tube with the fin to be processed is bent into a U shape by the rotary / lifting type pressing die while being tilted and held upward to form a rising portion continuous to the second stage, and then the first stage The finned meandering tube is further rotated to a horizontal state, and the finned tube is fed along a pair of left and right bending rolls on the same horizontal plane while intermittently feeding the processed finned tube in the tube axis direction for a predetermined length. Then, the second-stage finned meandering tube is formed so as to overlap almost directly below the first-stage finned meandering tube by bending it into a U shape alternately with a rotary / lifting pressure die. In this method, the finned meandering tube is bent continuously in multiple stages by repeating the same operation as above, and the snake bending process, the formation of the rising part in the next stage, and the snake bending process in the next stage are performed in order. By repeating continuously, so that the finned serpentine tube is superimposed automatically multistage.
JP-A-10-58049

しかるに、この多段重ね曲げ加工方法は、Ｕ字形に曲げ加工して形成したフィン付き蛇行チューブを順次上方に重ねられていくため、このフィン付き蛇行チューブの重ね段数が増えるにつれてフィン付き蛇行チューブの自重のための変形や曲げ動作にともなう振動が発生し易くなる。このため、必ずしも必須とするものではないが、曲げ加工動作を安定させるためにはフィン付き蛇行チューブの変形や振動を軽減あるいは抑制する手段を設けた方が好ましい。
その手段としては、フィン付き蛇行チューブを２段目あたりからバネ付き吊具等のフックに引っ掛けて弾性保持する方法が一般的であるが、この吊具等により上からフィン付き蛇行チューブを吊す方法は、毎回吊具をフィン付き蛇行チューブに着脱しなければならないばかりでなく、フィン付き蛇行チューブの重ね段数が多くなるにつれて重量が増すため、その都度バネ力を調整しなければならないという欠点があった。
また、この吊具等により上からフィン付き蛇行チューブを吊す方法では、曲げ加工時の回動や振動による変形や振動を完全には制御できず、曲げ形状が不安定となりバラツキが生じ易いという欠点があった。 However, in this multi-stage lap bending method, the finned meandering tube formed by bending into a U-shape is sequentially piled upward, so that the self-weight of the finned meandering tube increases as the number of the leveling steps of the finned meandering tube increases. Therefore, vibrations due to deformation and bending operations are likely to occur. For this reason, although not essential, it is preferable to provide means for reducing or suppressing deformation and vibration of the finned meandering tube in order to stabilize the bending operation.
As a means for this, there is a general method in which the finned meandering tube is hooked on a hook such as a spring-loaded hanger from around the second stage and is elastically held. Not only does it have to be attached to and detached from the finned meander tube each time, but the weight increases as the number of finned meander tube stacks increases, so the spring force must be adjusted each time. It was.
In addition, the method of suspending a finned meandering tube from above with a lifting tool or the like cannot be completely controlled for deformation and vibration due to rotation and vibration during bending, and the bending shape becomes unstable and tends to vary. was there.

本発明は、上記した多段重ね曲げ加工方法の欠点を解消するためになされたもので、フィン付き蛇行チューブを吊す吊具等を必要とすることなくフィン付き蛇行チューブの変形や振動を防止して曲げ加工動作を安定させることができるフィン付き蛇行チューブの多段重ね曲げ加工方法とその装置を提案しようとするものである。 The present invention was made in order to eliminate the disadvantages of the multi-stage bending method described above, and prevents deformation and vibration of the finned serpentine tube without requiring a hanging tool for hanging the finned serpentine tube. The present invention intends to propose a multi-stage bending method and apparatus for a meandering tube with fins that can stabilize the bending operation.

本発明は、スネーク曲げ加工を終えたフィン付き蛇行チューブを上方へ多段に折り重ねていく方式に替えて、スネーク曲げ加工を終えたフィン付き蛇行チューブを下方へ多段に折り重ねていく方式を採用したもので、その要旨は、被加工フィン付きチューブを蛇行状に折曲げ、かつその蛇行状に折曲げたフィン付き蛇行チューブと相重なるように連続して被加工フィン付きチューブを蛇行状に折曲げ、以後同様にしてフィン付き蛇行チューブを連続して多段に重ね曲げ加工する方法において、被加工フィン付きチューブを管軸線方向に所定長さ間欠送りしながら、当該フィン付きチューブを上下動可能なテーブルの同一水平面上で左右一対の曲げロールに沿って回動・昇降式押圧ダイにて交互にＵ字形に曲げ加工してフィン付き蛇行チューブを形成し、１段分のフィン付き蛇行チューブ曲げ加工終了時、被加工フィン付きチューブを管軸線方向に一定長さ送った後、前記上下動可能なテーブルを下降させて１段目のフィン付き蛇行チューブを前記曲げロール部を支点に下方に回動させて傾斜保持した状態で前記回動・昇降式押圧ダイにて被加工フィン付きチューブをＵ字形に曲げ加工して２段目に連続する立上り部を下側に形成し、次いで前記テーブルを上昇させて前記１段目のフィン付き蛇行管を当該テーブル上面で水平状態に保持した状態で、再び被加工フィン付きチューブを管軸線方向に所定長さ間欠送りしながら、当該フィン付きチューブを前記テーブル面上で左右一対の曲げロールに沿って回動・昇降式押圧ダイにて交互にＵ字形に曲げ加工して２段目のフィン付き蛇行チューブを前記１段目のフィン付き蛇行チューブのほぼ真上に相重なるように形成し、以後前記と同様の動作を繰返してフィン付き蛇行チューブを連続して多段に曲げ加工することを特徴とするものである。 The present invention adopts a method of folding the serpentine tube with fins finished with the snake bending process downward in a multistage manner instead of the method of folding the serpentine tube with fins finished with the snake bending process upward. The gist is that the finned tube is bent in a serpentine shape, and the finned tube is continuously bent in a serpentine shape so as to overlap with the meandered finned tube. In the method of bending and thereafter bending the meandering tube with fins continuously in multiple stages, the finned tube can be moved up and down while intermittently feeding the finned tube to be processed in the tube axis direction for a predetermined length. A meandering tube with fins that is bent into a U shape alternately with a rotating / lifting pressure die along a pair of left and right bending rolls on the same horizontal plane of the table. At the end of bending and bending the one-step finned meandering tube, the tube with the fin to be processed is sent in a certain length in the tube axis direction, and then the vertically movable table is lowered to meander with the first-step finned fin The tube with fins to be processed is bent into a U-shape by the rotary / lifting pressure die while the tube is rotated downward with the bending roll portion as a fulcrum, and the tube rises continuously in the second stage. Then, the table is raised and the first finned meandering tube is held in a horizontal state on the upper surface of the table. While being intermittently fed, the tube with fins is bent into a U-shape alternately with a rotating / lifting press die along a pair of right and left bending rolls on the table surface, and the meander with fins in the second stage A tube is formed so as to overlap almost directly above the first-stage finned meandering tube, and thereafter the same operation as described above is repeated to bend the finned meandering tube continuously in multiple stages. Is.

また、この方法を実施するための装置は、被加工フィン付きチューブを蛇行状に折曲げ、かつその蛇行状に折曲げたフィン付き蛇行チューブと相重なるように連続して被加工フィン付きチューブを蛇行状に折曲げ、以後同様にしてフィン付き蛇行チューブを連続して多段に重ね曲げ加工する装置において、同一水平面上に垂直に配置した左右一対の曲げロールと、該曲げロールと同一回転軸に一定角度回動可能に取付けられたアームに昇降可能に立設された一対の回動・昇降式押圧ダイと、前記曲げロールの真下に配置された昇降式チューブ受けテーブルと、前記曲げロールの入側に該ロールと同一水平面上に配設され、かつ該ロール間と同一軸線上に配設され、被加工フィン付きチューブを一定ストローク前後動させるとともに、円周方向に所定角度回動させる被加工フィン付きチューブ送りガイドとから構成され、前記送りガイドを貫通して曲げロールに通した直線状の被加工フィン付きチューブを前記送りガイドにより管軸線方向に一定長さ間欠的に送りながら、前記回動・昇降式押圧ダイにより該チューブを交互にＵ字形に曲げ加工してフィン付き蛇行チューブを形成し、１段目のフィン付き蛇行チューブ曲げ加工終了時に前記チューブ受けテーブルを所定の高さ位置に下降させて該フィン付き蛇行チューブを下方に回動させて傾斜保持した状態で、被加工フィン付きチューブをＵ字形に曲げ加工して２段目に連続する立上り部を下側に形成した後、前記チューブ受けテーブルを所定の高さ位置に上昇させて再び被加工フィン付きチューブを一定長さ間欠送りしながら２段目のフィン付き蛇行チューブを１段目のフィン付き蛇行チューブのほぼ真上に相重なるように形成し、以後前記と同様の動作を繰返して前記チューブ受けテーブル上にフィン付き蛇行チューブを連続して多段に曲げ加工する方式となしたことを特徴とするものである。 Further, an apparatus for carrying out this method is to fold a tube with a fin to be processed into a meandering shape, and continuously form a tube with a fin to be worked so as to overlap with the meandering tube with a fin bent into the meandering shape. In a device that bends in a meandering manner, and thereafter folds the finned meandering tube continuously in multiple stages, a pair of left and right bending rolls arranged vertically on the same horizontal plane, and the same rotational axis as the bending roll A pair of pivoting / elevating type pressing dies standing up and down on an arm mounted so as to be pivotable at a fixed angle, an elevating type tube receiving table arranged directly below the bending roll, and the insertion of the bending roll Is arranged on the same horizontal plane as the roll and on the same axis as between the rolls. A tube feed guide with fins to be machined that rotates by a predetermined angle, and a straight tube with fins to be machined that passes through the feed guide and passes through a bending roll is intermittently intermittent in the tube axis direction by the feed guide. The tube is alternately bent into a U shape by the rotary / elevating pressure die while forming the fin, and the finned meandering tube is formed. Is lowered to a predetermined height position and the finned meandering tube is rotated downward and held in an inclined state, and the finned tube is bent into a U-shape so that the rising portion continuous in the second stage is formed. After forming on the lower side, the tube receiving table is raised to a predetermined height position, and the tube with fins to be processed is again intermittently fed for a fixed length for two steps. The meandering tube with fins is formed so as to overlap almost directly above the first level meandering tube with fins, and thereafter the same operation as described above is repeated so that the finned meandering tube is continuously multi-staged on the tube receiving table. It is characterized by the fact that it has become a method of bending.

なお、前記曲げロールは、機台に垂直に並設した２本の回転軸の下端にそれぞれ別々に取着され、前記回動・昇降式押圧ダイは、前記２本の回転軸に別々に取付けられた垂直シリンダーにそれぞれ上下動可能に垂直に接続された支持ロッドの下端に取着された構成となしたものを用いることができ、また、前記昇降式チューブ受けテーブルは、機台に設置したモータまたは流体圧シリンダーを駆動源とする昇降機構にて上下動可能に水平に支持され、曲げ加工時の上下方向のストロークおよびテーブル高さをサーボ制御する仕組みとなしたものを用いることができる。 The bending rolls are separately attached to the lower ends of two rotating shafts arranged vertically in parallel with the machine base, and the rotary / lifting pressure die is separately attached to the two rotating shafts. It is possible to use a structure that is attached to the lower end of a support rod that is vertically connected to each vertical cylinder so that it can move up and down, and the elevating tube receiving table is installed on a machine base. A mechanism that is horizontally supported by an elevating mechanism using a motor or a fluid pressure cylinder as a drive source so as to be movable up and down and servo-controls the vertical stroke and table height during bending can be used.

本発明に係るフィン付き蛇行チューブの多段重ね曲げ加工方法によれば、フィン付き蛇行チューブを曲げロールの下方に順次折り重ねていく方式を採用したことにより、曲げ加工時に発生する捻りを抑制することができる上、フィン付き蛇行チューブの重ね段数が増えてもフィン付き蛇行チューブを吊す吊具等を必要とすることなくフィン付き蛇行チューブの変形や振動を防止して曲げ加工動作を安定させることができるので、常に安定した形状精度の優れた多段重ね曲げ加工が可能となると共に、吊具の着脱が不要なため生産性が大幅に向上する。 According to the multi-stage bending method of the meandering tube with fins according to the present invention, by adopting the method of sequentially folding the meandering tube with fins below the bending roll, the twist generated during the bending process is suppressed. In addition, the bending operation can be stabilized by preventing deformation and vibration of the finned serpentine tube without requiring a lifting tool for hanging the finned serpentine tube even when the number of overlapping layers of the finned serpentine tube increases. As a result, it is possible to perform multi-stage lap bending with always stable and excellent shape accuracy, and the productivity is greatly improved because it is not necessary to attach and detach the hanging tool.

この発明方法は、被加工フィン付きチューブのスネーク曲げ加工方法として、左右一対の曲げロールの間に被加工フィン付きチューブを通し、この左右の曲げロールの各回転軸を同心としてそれぞれの曲げロールの回りを回動する回動・昇降式押圧ダイにて前記被加工フィン付きチューブを一定長さずつ交互にＵ字形に曲げ加工していくフィン付き蛇行チューブの多段重ね曲げ加工方法において、１段分のスネーク曲げ加工を曲げロールの下方に上下動可能に配置したテーブル面上で行い、１段分のスネーク曲げ加工が終了すると、２段目との間隔を確保するため前記テーブルを下げて１段目のフィン付き蛇行チューブを前記曲げロール部を支点に下方に回動させて傾斜保持した状態でＵ字形曲げ加工を施して２段目に連続する立上り部を下側に形成し、その状態で前記テーブルを上昇させて１段目のフィン付き蛇行チューブを元の水平状態に戻し、２段目のスネーク曲げを開始すると、１段目のフィン付き蛇行チューブの真上に所定の間隔を保持した状態で２段目のフィン付き蛇行チューブが形成される。したがって、スネーク曲げ加工と、次の段に連続する立上り部の形成および次段のスネーク曲げ加工を順次連続して繰返すことにより、前記曲げロールの下方のテーブル面上にフィン付き蛇行チューブが自動的に多段に重ねられていく方法である。 The method of the present invention is a snake bending method for a tube with a work fin, wherein a tube with a work fin is passed between a pair of left and right bending rolls, and the respective rotation shafts of the left and right bending rolls are concentric. In a multi-stage lap bending method for finned meandering tubes, the finned tube is bent into a U-shape alternately by a fixed length by a rotating / lifting pressure die that rotates about one step. The snake bending process is performed on a table surface which is arranged below the bending roll so as to be movable up and down. When the snake bending process for one stage is completed, the table is lowered to secure a gap with the second stage. The serpentine tube with fins of the eyes is bent downward with the bending roll part as a fulcrum and held in a tilted state, and a U-shaped bending process is applied to lower the rising part continuous in the second stage. In this state, the table is raised to return the first-stage finned meandering tube to the original horizontal state, and when the second-stage snake bending is started, the first-stage finned meandering tube is directly above. The second-stage finned serpentine tube is formed in a state where a predetermined interval is maintained. Therefore, the meandering tube with fins is automatically formed on the table surface under the bending roll by successively repeating the snake bending process, the formation of the rising part continuing to the next stage and the snake bending process of the next stage. It is a method of being stacked in multiple stages.

本発明における隣接するフィン付き蛇行チューブの間隔は、特許文献１に記載のものと同様、１段分のスネーク曲げが終了して次段のスネーク曲げ動作に入る前に行う立上り部の長さによって変えることができる。この立上り部の長さは、１段分のスネーク曲げ加工が終了した時点で該フィン付き蛇行チューブを下方に回動させて傾斜保持する角度によって種々変えることができる。すなわち、立上り部の長さを短くする場合には、前記テーブルの下降量を少なくして蛇行チューブの傾斜角度を小さくし、立上り部の長さを長くする場合には前記テーブルの下降量を多くして蛇行チューブの傾斜角度を大きくすればよい。
したがって、フィン付き蛇行チューブを曲げロールの下方に順次折り重ねていく方式の場合は、曲げ加工時に発生する捻りを抑制することができる上、フィン付き蛇行チューブの重ね段数が増えてもフィン付き蛇行チューブの変形や振動がなく、安定した形状の多段重ね曲げ加工が可能となる。 The interval between adjacent finned meandering tubes in the present invention is the same as that described in Patent Document 1, depending on the length of the rising portion that is performed before the first stage of snake bending is completed and before the next stage of snake bending operation is started. Can be changed. The length of the rising portion can be variously changed according to the angle at which the finned meandering tube is rotated downward and held when the snake bending process for one stage is completed. That is, when the length of the rising portion is shortened, the descending amount of the table is reduced to reduce the inclination angle of the meander tube, and when the length of the rising portion is lengthened, the descending amount of the table is increased. Then, the inclination angle of the meandering tube may be increased.
Therefore, in the case of the method in which the finned meandering tube is sequentially folded below the bending roll, the twist generated during the bending process can be suppressed and the finned meandering can be achieved even when the number of the finned meandering tube increases. There is no deformation or vibration of the tube, and a multi-stage bending process with a stable shape is possible.

また、本発明装置における前記曲げロールは、該曲げロールの下方にフィン付き蛇行チューブを多段に重ねていく関係上、機台の上側に垂直に設けた回転軸に前記チューブ受けテーブルより浮かして設けられている。さらに、回動・昇降式押圧ダイは、通常は被加工フィン付きチューブのＵ字形加工に支障をきたさないように被加工フィン付きチューブより上方に位置しており、被加工フィン付きチューブをＵ字形に折曲げるときのみ被加工フィン付きチューブの側面まで下降し、Ｕ字形折曲げ加工が終わる毎に上昇して該チューブより上方に位置する仕組みとなっている。 In addition, the bending roll in the apparatus of the present invention is provided so as to float above the tube receiving table on a rotating shaft provided vertically above the machine base in order to stack the finned meandering tubes in multiple stages below the bending roll. It has been. Furthermore, the rotary / elevating pressure die is usually positioned above the tube with the processed fin so as not to hinder the U-shaped processing of the tube with the processed fin, and the tube with the processed fin is U-shaped. Only when it is bent to the side, it descends to the side of the tube with the fin to be processed, and rises every time the U-shaped bending process is finished, and is positioned above the tube.

前記チューブ受けテーブルは、曲げロールの下方に向って曲げられたフィン付き蛇行チューブの段間隔、段数に応じて上面位置を調整しなければならないため、モータ駆動方式による自動昇降機構にて上下動可能となすとともに、その高さ位置や上下方向のストロークの制御は、精度や応答性等を考慮するとボールねじによるサーボ制御方式が好適である。 The tube receiving table must be adjusted up and down by a motor-driven automatic lifting mechanism because the upper surface position must be adjusted according to the step spacing and the number of steps of the finned meandering tube bent down the bending roll. In addition, a servo control method using a ball screw is suitable for the control of the height position and the vertical stroke in consideration of accuracy and responsiveness.

なお、曲げロールの入側には被加工フィン付きチューブの入口ガイドが配設されている。この入口ガイドは、被加工フィン付きチューブのＵ字形曲げ加工時に当該チューブを固定し、かつ該チューブを一定長さ送り出す時にチューブを解放しなければならないため、一端にクランプ治具を有している。このクランプ治具は、筒体の一端を切欠いた部分に配置したシリンダーとチューブ押圧部材とからなり、被加工フィン付きチューブのＵ字形曲げ加工時には該チューブがクランプされ、一定長さ送り時には該チューブが解放される仕組みとなっている。 In addition, the entrance guide of the tube with a to-be-processed fin is arrange | positioned at the entrance side of the bending roll. This inlet guide has a clamp jig at one end because the tube must be fixed when the tube with the fin to be processed is bent into a U-shape and the tube must be released when the tube is sent out for a certain length. . This clamping jig is composed of a cylinder and a tube pressing member arranged at a notch at one end of a cylindrical body. The tube is clamped when a U-shaped bending process is performed on a tube with a fin to be processed, and the tube is fed when a certain length is fed. Is a mechanism to be released.

また、前記入口ガイドの後方に配設される被加工フィン付きチューブ送りガイドは、左右一対の曲げロールと回動・昇降式押圧ダイにて被加工フィン付きチューブを交互にＵ字形に曲げ加工する際に、該チューブを一定長さ間欠送りする働きと、１段分のスネーク曲げが終了する毎にフィン付き蛇行チューブ全体を水平状態から下側に回動させて所定の角度に傾斜させるためのチューブ回動作用の２つの機能を有するガイドであり、その構造は、流体圧シリンダーまたはモータ駆動にて一定ストローク往復動する可動台に吊設された円筒状の外筒に、一端にシリンダー駆動のクランプ治具を有する円筒体がモータ駆動にて回転可能に内嵌支持されており、シリンダー駆動のクランプ治具としては、前記円筒体の先端側の側面の一部を本体と切離してチューブ押圧部材とし、この押圧部材を本体に対し連結ピン等を介して上下動可能に接続するとともに、当該押圧部材に取付けたシリンダーにて該円筒体内のフィン付きチューブをクランプする機構を用いることができる。 Also, the tube feed guide with fins to be processed disposed behind the inlet guide bends the finned tubes alternately into a U shape by a pair of left and right bending rolls and a rotary / lifting pressure die. In this case, the tube is intermittently fed for a certain length, and the finned meandering tube is rotated downward from the horizontal state and inclined at a predetermined angle every time one stage of snake bending is completed. The guide has two functions of tube rotation, and its structure is a cylindrical cylinder that is suspended from a fluid pressure cylinder or a movable base that reciprocates at a fixed stroke by a motor drive, and a cylinder drive at one end. A cylindrical body having a clamp jig is rotatably supported by a motor. The cylinder-driven clamp jig has a part of the side surface on the tip side of the cylindrical body cut from the main body. A tube pressing member is connected to the main body via a connecting pin or the like so as to be movable up and down, and a mechanism for clamping the finned tube in the cylindrical body with a cylinder attached to the pressing member is used. be able to.

図１はこの発明の一実施例装置を一部破断して示す概略側面図、図２は同上装置を一部破断して示す概略正面図、図３は同上装置の曲げロール部および入口ガイド部を拡大して示す図で、（ａ）は概略平面図、（ｂ）は概略側面図、図４は被加工フィン付きチューブ送りガイドを拡大して示す概略正面図、図５は同上被加工フィン付きチューブ送りガイドの概略背面図、図６〜図１２は同上装置によるフィン付き蛇行チューブの曲げ加工方法を示す概略図、図１３〜図１８は同上装置によるフィン付蛇行チューブの多段重ね曲げ加工を示す概略図、１は機台、１−１は水平架台、１−２はＬ形架台、１−３は支持板、１−４は台板、２は曲げロール、３は回動・昇降式押圧ダイ、４は昇降式チューブ受けテーブル、５は入口ガイド、６は被加工フィン付きチューブ送りガイドである。 FIG. 1 is a schematic side view showing a partially broken apparatus according to an embodiment of the present invention, FIG. 2 is a schematic front view showing a partially broken apparatus, and FIG. 3 is a bending roll section and an inlet guide section of the apparatus. FIG. 4A is a schematic plan view, FIG. 4B is a schematic front view showing an enlarged tube feed guide with a workpiece fin, and FIG. 6 to 12 are schematic views showing a method of bending a meandering tube with fins by the above apparatus, and FIGS. 13 to 18 are multi-stage bending processes of the meandering tube with fins by the above apparatus. Schematics shown 1 is a machine base, 1-1 is a horizontal base, 1-2 is an L-shaped base, 1-3 is a support plate, 1-4 is a base plate, 2 is a bending roll, 3 is a rotating / lifting type Pressing die, 4 is an elevating tube receiving table, 5 is an inlet guide, 6 is a load Is a tube feed guide finned.

図１において、機台１は複数本の角材で組立てられた全体が空間となしたほぼ長方形の水平架台１−１と、該水平架台１−１の上面に設置されたＬ形架台１−２とから構成され、前記水平架台１−１の上には図３に示すごとくほぼ中央部に曲げロール２および回動・昇降式押圧ダイ３を設けるためのほぼ凹形の窓１−４ａと入口ガイド５を設置するための矩形溝１−４ｂを有する台板１−４が水平に固着され、該台板１−４の下方に昇降式チューブ受けテーブル４が設置され、前記Ｌ形架台１−２と台板１−４に曲げロール２、回動・昇降式押圧ダイ３、入口ガイド５および被加工フィン付きチューブ送りガイド６が取付けられている。 In FIG. 1, a machine base 1 is a substantially rectangular horizontal base 1-1 assembled with a plurality of square members, and an L-shaped base 1-2 installed on the upper surface of the horizontal base 1-1. As shown in FIG. 3, a substantially concave window 1-4a and an entrance for providing a bending roll 2 and a rotary / lifting / lowering pressing die 3 at a substantially central portion as shown in FIG. A base plate 1-4 having a rectangular groove 1-4b for installing the guide 5 is fixed horizontally, and an elevating tube receiving table 4 is installed below the base plate 1-4. 2 and a base plate 1-4 are attached with a bending roll 2, a rotary / lifting pressing die 3, an inlet guide 5 and a tube feed guide 6 with fins to be processed.

曲げロール２は左右一対の鼓形ロール２−１、２−２で構成され、それぞれＬ形架台１−２の正面上部に固定された回動・昇降式押圧ダイ３のロータリーアクチュエータ３−１、３−２の各回転軸３−３、３−４の下端に、前記台板１−４の上面に固着されたブラケット２−３を介してロール上面が台板１−４の下面とほぼ面一になるように同軸線上に取付けられている。なお、図１に示す回動・昇降式押圧ダイ３は、一方の鼓形ロール２−１の駆動機構のみ示し、他方の鼓形ロール２−１の駆動機構は省略している。 The bending roll 2 is composed of a pair of left and right drum rolls 2-1 and 2-2, each of which is a rotary actuator 3-1 of a rotary / lifting pressing die 3 fixed to the upper front portion of the L-shaped frame 1-2. The upper surface of the roll is substantially the same as the lower surface of the base plate 1-4 via a bracket 2-3 fixed to the upper surface of the base plate 1-4 at the lower end of each of the rotating shafts 3-3 and 3-4 of 3-2. It is mounted on the coaxial line so as to become one. 1 shows only the driving mechanism of one hourglass roll 2-1, and the driving mechanism of the other hourglass roll 2-1 is omitted.

回動・昇降式押圧ダイ３は、前記ロータリーアクチュエータ３−１、３−２と、該ロータリーアクチュエータ３−１、３−２に接続された相平行する回転軸３−３、３−４、該回転軸３−３、３−４に水平に突設したアーム３−５、３−６に垂設したシリンダー３−７、３−８の支持ロッド３−７ａ、３−８ａの下端に取付けられて当該シリンダーにて昇降可能に設けた押圧ダイ３−９、３−１０とから構成され、ロータリーアクチュエータ３−１、３−２にて押圧ダイ３−９、３−１０が各回転軸３−３、３−４を支点にしてそれぞれ、前記台板１−４に設けた凹形窓１−４ａ内を回動する仕組みとなしている。この回動・昇降式押圧ダイ３の各押圧ダイ３−９、３−１０は、通常はそれぞれのシリンダー３−７、３−８にて曲げロール２の上側に位置し、曲げ加工動作開始時にはシリンダー３−７、３−８にて所定の位置まで下降し、曲げ加工動作開始と同時にロータリーアクチュエータ３−１、３−２にて凹形窓１−４ａ内を回動してＵ字形曲げ加工動作に入るようになっている。 The rotary / elevating pressure die 3 includes the rotary actuators 3-1 and 3-2, parallel rotating shafts 3-3 and 3-4 connected to the rotary actuators 3-1 and 3-2, Mounted on the lower ends of the support rods 3-7a and 3-8a of the cylinders 3-7 and 3-8 suspended from the arms 3-5 and 3-6 projecting horizontally on the rotary shafts 3-3 and 3-4 And press dies 3-9 and 3-10 provided so as to be movable up and down by the cylinder, and the press dies 3-9 and 3-10 are respectively connected to the rotary shafts 3 by the rotary actuators 3-1 and 3-2. 3 and 3-4 are used as fulcrums, respectively, so that the inside of the concave window 1-4a provided on the base plate 1-4 is rotated. The pressing dies 3-9 and 3-10 of the rotary / lifting pressing die 3 are usually positioned above the bending roll 2 in the respective cylinders 3-7 and 3-8, and at the start of the bending operation. Cylinders 3-7 and 3-8 are lowered to a predetermined position, and at the same time as the bending process starts, the rotary actuators 3-1 and 3-2 rotate in the concave window 1-4a to perform a U-shaped bending process. It comes to work.

前記押圧ダイ３−９、３−１０の回動ストロークは、図示しないコントローラーにて設定されてロータリーアクチュエータ３−１、３−２を制御し、被加工フィン付きチューブをＵ字形に曲げる際は、各押圧ダイ３−９、３−１０がシリンダー３−７、３−８にて所定の位置まで下降し、被加工フィン付きチューブを押圧しながら曲げロール２の外周に沿って回動し、該チューブをＵ字形に折り曲げて所定の位置で停止すると同時に、シリンダー３−７、３−８にて上昇して曲げロール２より上側に位置する仕組みとなっている。 The rotation strokes of the pressing dies 3-9 and 3-10 are set by a controller (not shown) to control the rotary actuators 3-1, 3-2, and when bending the tube with fins to be processed into a U shape, Each pressing die 3-9, 3-10 descends to a predetermined position by the cylinders 3-7, 3-8, and rotates along the outer periphery of the bending roll 2 while pressing the tube with the fin to be processed. The tube is bent into a U shape and stopped at a predetermined position, and at the same time, the tube is lifted by the cylinders 3-7 and 3-8 and positioned above the bending roll 2.

昇降式チューブ受けテーブル４は、水平板部４−１と垂直板部４−２を有する断面Ｌ字形をなしており、位置的には前記曲げロール２および回動・昇降式押圧ダイ３のほぼ真下当りに位置し、曲げロール２の位置より背面側の水平架台下部に横設したＬ形架台４−３にモータ駆動の回転ねじ軸４−５を介して昇降可能となしたもので、その構造は前記Ｌ形架台４−３に中央部に設置した可逆モータ４−４の駆動軸に同期して連結された回転ねじ軸４−５の上端部に当該ねじ軸に螺合する筒状ナット４−６を介して前記チューブ受けテーブル４の垂直板部４−２が取付けられ、可逆モータ４−４の駆動による回転ねじ軸４−５の正転、逆転により昇降式チューブ受けテーブル４が所定ストローク昇降する機構となしている。すなわち、この昇降式チューブ受けテーブル４は、前記曲げロール２および回動・昇降式押圧ダイ３にてＵ字形に曲げ加工されたフィン付き蛇行チューブを当該テーブルの水平板部４−１で受け、順次折り重ねていく際の重ね段の間隔（立上り部の長さ）および重ね段数に応じて上下方向のストロークおよびテーブル高さがサーボ制御される仕組みとなしている。 The elevating tube receiving table 4 has an L-shaped cross section having a horizontal plate portion 4-1 and a vertical plate portion 4-2. It can be moved up and down via a motor-driven rotating screw shaft 4-5 to an L-shaped gantry 4-3, which is located just underneath and is laid horizontally below the horizontal gantry on the back side from the position of the bending roll 2. The structure is a cylindrical nut that is screwed to the upper end of a rotary screw shaft 4-5 that is connected to the L-shaped mount 4-3 in synchronization with the drive shaft of a reversible motor 4-4 installed at the center. The vertical plate portion 4-2 of the tube receiving table 4 is attached via 4-6, and the elevating type tube receiving table 4 is predetermined by the normal rotation and reverse rotation of the rotating screw shaft 4-5 driven by the reversible motor 4-4. It has a mechanism that moves up and down the stroke. That is, the elevating tube receiving table 4 receives the finned meandering tube bent into a U shape by the bending roll 2 and the rotating / elevating pressing die 3 at the horizontal plate portion 4-1 of the table, The mechanism is such that the vertical stroke and the table height are servo-controlled according to the interval between the overlapping steps (the length of the rising portion) and the number of overlapping steps when sequentially folding.

曲げロール２の鼓形ロール２−１、２−２の入側の台板１−４の矩形溝１−４ｂの部分に該ロールと同一水平面上に配設された被加工フィン付きチューブの入口ガイド５は、管軸線上に円孔５−１を有する筒体からなり、該筒体の後端部を一部切欠いて形成した凹部５−２の部分に、前記Ｌ形架台１−２に固着された支持板１−３に固設された流体圧シリンダー５−３と、該シリンダーにて上下動するチューブ押圧部材５−４とからなるクランプ治具５−５を有している。すなわち、このクランプ治具は、被加工フィン付きチューブのＵ字形曲げ加工時には該チューブがクランプされ、一定長さ送り時には該チューブが解放される仕組みとなっている。 The inlet of the tube with the fin to be processed disposed in the rectangular groove 1-4b of the base plate 1-4 on the entry side of the hourglass rolls 2-1 and 2-2 of the bending roll 2 on the same horizontal plane as the roll. The guide 5 is formed of a cylindrical body having a circular hole 5-1 on the tube axis, and the L-shaped frame 1-2 is attached to the concave portion 5-2 formed by partially cutting the rear end portion of the cylindrical body. It has a clamp jig 5-5 including a fluid pressure cylinder 5-3 fixed to the fixed support plate 1-3 and a tube pressing member 5-4 that moves up and down by the cylinder. That is, this clamping jig is structured such that the tube is clamped when the U-shaped bending process is performed on the tube with fins to be processed, and the tube is released when the tube is fed for a certain length.

前記入口ガイド５の後方に位置する被加工フィン付きチューブ送りガイド６は、前記支持板１−３にモータ駆動による回転ねじ軸により管軸線方向に一定ストローク往復動する可動台６−１と、この可動台に吊設された円筒状の外筒６−３、この外筒に円周方向に回動可能に内嵌支持された円筒体６−４、この円筒体の先端側に設けたクランプ治具６−５および円筒体６−４の後部側に配設した円筒体回動装置６−６とから構成されている（図１参照）。 A tube feed guide 6 with fins to be processed located behind the inlet guide 5 includes a movable base 6-1 that reciprocates a fixed stroke in the tube axis direction by a rotating screw shaft driven by a motor on the support plate 1-3. A cylindrical outer cylinder 6-3 suspended from a movable base, a cylindrical body 6-4 that is supported by the outer cylinder so as to be pivotable in the circumferential direction, and a clamp that is provided on the distal end side of the cylindrical body. It is comprised from the tool 6-5 and the cylindrical body rotation apparatus 6-6 arrange | positioned at the rear part side of the cylindrical body 6-4 (refer FIG. 1).

上記可動台６−１は、管軸線方向に敷設したレール６−７に連結筒体６−１ａを介して移動自在に凹凸嵌合され、前記支持板１−３の後端部に設置した可逆モータ６−２の駆動軸に管軸線方向に連結された回転ねじ軸６−１ｂに当該ねじ軸に螺合する前記連結筒体６−１ａを介して取付けられ、可逆モータ６−２の駆動による回転ねじ軸６−１ｂの正転、逆転により当該可動台６−１が所定ストローク往復動する機構となしている。 The movable base 6-1 is reversibly fitted to a rail 6-7 laid in the tube axis direction through a connecting cylinder 6-1a so as to be movable, and is installed at the rear end of the support plate 1-3. It is attached to the rotary screw shaft 6-1b connected to the drive shaft of the motor 6-2 in the tube axis direction via the connecting cylinder 6-1a screwed to the screw shaft, and driven by the reversible motor 6-2. The movable base 6-1 is configured to reciprocate by a predetermined stroke by forward and reverse rotation of the rotating screw shaft 6-1b.

また、前記円筒体６−４の先端側に設けたクランプ治具６−５は、該円筒体の先端側の側面の一部を本体と切離してチューブ押圧部材６−８とし、この押圧部材を本体に対し連結ピン６−９を介して管軸線と直角方向に移動可能に接続するとともに、当該押圧部材６−８に取付けた流体圧シリンダー６−１０にて該円筒体内のフィン付きチューブをクランプする機構となっている。 Further, the clamp jig 6-5 provided on the distal end side of the cylindrical body 6-4 separates a part of the side surface on the distal end side of the cylindrical body from the main body to form a tube pressing member 6-8. The main body is connected to the main body via a connecting pin 6-9 so as to be movable in a direction perpendicular to the tube axis, and the finned tube in the cylindrical body is clamped by the fluid pressure cylinder 6-10 attached to the pressing member 6-8. It is a mechanism to do.

さらに、前記円筒体６−４の後部側に配設した円筒体回動装置６−６は、可動台６−１の端部に管軸線方向に取付けた回動用モータ６−１１により、当該モータの駆動軸に取付けたギヤＧ１と円筒体６−４の後端部に取付けたギヤＧ２を介して当該円筒体を円周方向に所定の角度回動させる機構となっている。 Further, a cylindrical body rotating device 6-6 disposed on the rear side of the cylindrical body 6-4 is provided with a rotating motor 6-11 attached to the end of the movable base 6-1 in the tube axis direction. This mechanism is a mechanism for rotating the cylindrical body by a predetermined angle in the circumferential direction via a gear G1 attached to the drive shaft and a gear G2 attached to the rear end of the cylindrical body 6-4.

すなわち、被加工フィン付きチューブ送りガイド６は、左右一対の曲げロール２と回動・昇降式押圧ダイ３にて被加工フィン付きチューブを交互にＵ字形に曲げ加工する際に、該チューブを一定長さ間欠送りする働きと、１段分のスネーク曲げが終了する毎にフィン付き蛇行チューブ全体を水平状態から下側に所定の角度に傾斜させるためのチューブ回動作用の２つの機能を有している。 That is, the tube feed guide 6 with the fin to be processed is fixed when the tube with the fin to be processed is alternately bent into a U shape by the pair of left and right bending rolls 2 and the rotary / lifting press die 3. It has two functions: intermittent feed for length, and tube turning action for tilting the entire finned meandering tube downward from the horizontal state at a predetermined angle every time one stage of snake bending is completed. ing.

次に、上記構成のフィン付き蛇行チューブ多段重ね曲げ加工装置の曲げ加工動作について説明する。
まず、被加工フィン付きチューブＷを送りガイド６および入口ガイド５を貫通して左右一対の曲げロール２間に通し、該曲げロール２の鼓形ロール２−１、２−２より所定の長さ突出させる。この時、鼓形ロール２−１、２−２の回転軸３−３、３−４に突設したアーム３−５、３−６に取付けられたシリンダー３−７、３−８の支持ロッド３−７ａ、３−８ａに取付けられている押圧ダイ３−９、３−１０は、それぞれ曲げロール２の鼓形ロール２−１、２−２より上側にかつ入口ガイド５と反対側に待機している（図６参照）。 Next, the bending operation of the finned serpentine tube multi-stage bending apparatus having the above-described configuration will be described.
First, the tube W with fins to be processed passes through the feed guide 6 and the inlet guide 5 and passes between the pair of left and right bending rolls 2, and has a predetermined length from the hourglass rolls 2-1 and 2-2 of the bending roll 2. Make it protrude. At this time, the support rods of the cylinders 3-7 and 3-8 attached to the arms 3-5 and 3-6 protruding from the rotary shafts 3-3 and 3-4 of the hourglass rolls 2-1 and 2-2. The pressing dies 3-9 and 3-10 attached to the 3-7a and 3-8a are on standby above the hourglass rolls 2-1 and 2-2 of the bending roll 2 and on the side opposite to the inlet guide 5, respectively. (See FIG. 6).

被加工フィン付きチューブＷのスネーク曲げ動作に入る場合は、入口ガイド５のクランプ治具５−５は閉じて被加工フィン付きチューブＷを挟持し、送りガイド６のクランプ治具６−５は開いた状態にある。この状態で装置を起動させると、昇降式チューブ受けテーブル４が上昇して台板１−４との間に被加工フィン付きチューブＷを軽く挟み、この状態で回動・昇降式押圧ダイ３の一方の押圧ダイ３−９がシリンダー３−７により被加工フィン付きチューブＷの側面位置まで下降位置すると同時に、この側のロータリーアクチュエータ３−１にて被加工フィン付きチューブを押圧しながら曲げロール２の鼓形ロール２−２の外周に沿って凹形窓１−４ａ内を回動し、台板１−４の下面（裏面）に当該チューブを摺接させながらＵ字形に折り曲げて停止し、この位置で押圧ダイ３−９がシリンダー３−７にて上昇して曲げロール２の鼓形ロール２−１、２−２より上側に待機する（図７参照）。前記曲げ加工は、昇降式チューブ受けテーブル４と台板１−４の間に被加工フィン付きチューブＷを軽く挟んだ状態で行われるので、曲げ加工時に発生するひねりは抑制される。 When the snake bending operation of the tube W with the work fin is started, the clamp jig 5-5 of the inlet guide 5 is closed to hold the tube W with the work fin, and the clamp jig 6-5 of the feed guide 6 is opened. It is in the state. When the apparatus is started in this state, the elevating tube receiving table 4 rises, and the tube W with fins to be processed is lightly sandwiched between the base plate 1-4 and the rotating / elevating pressure die 3 of the rotating / elevating pressure die 3 is in this state. One pressing die 3-9 is lowered to the side surface position of the tube W to be processed by the cylinder 3-7, and at the same time, the bending roll 2 while pressing the tube with the fin to be processed by the rotary actuator 3-1 on this side. Rotate the inside of the concave window 1-4a along the outer periphery of the drum roll 2-2 , and stop by folding the tube into a U shape while sliding the tube against the lower surface (back surface) of the base plate 1-4. At this position, the pressing die 3-9 rises in the cylinder 3-7 and stands by above the hourglass rolls 2-1 and 2-2 of the bending roll 2 (see FIG. 7). Since the bending process is performed in a state where the tube W with fins to be processed is lightly sandwiched between the elevating tube receiving table 4 and the base plate 1-4, the twist generated during the bending process is suppressed.

次に、入口ガイド５のクランプ治具５−５が開き被加工フィン付きチューブＷを解放すると同時に、チューブ送りガイド６のクランプ治具６−５が閉じて当該ガイドの可動台６−１が可逆モータ６−２により一定ストローク前進し被加工フィン付きチューブＷを一定長さ送る（図８参照）。 Next, the clamp jig 5-5 of the inlet guide 5 is opened to release the tube W with fins to be processed. At the same time, the clamp jig 6-5 of the tube feed guide 6 is closed and the movable base 6-1 of the guide is reversible. The motor 6-2 moves forward by a fixed stroke and feeds the processed finned tube W by a fixed length (see FIG. 8).

被加工フィン付きチューブＷが一定長さ送られると、入口ガイド５のクランプ治具５−５が閉じて該チューブをクランプすると同時に、今度は他方の回動・昇降式押圧ダイ３の押圧ダイ３−１０が前記と同様、シリンダー３−８により被加工フィン付きチューブＷの側面位置まで下降位置すると同時に、この側のロータリーアクチュエータ３−２にて被加工フィン付きチューブを押圧しながら曲げロール２の鼓形ロール２−１の外周に沿って回動し当該チューブをＵ字形に折り曲げて停止し、この位置で押圧ダイ３−１０がシリンダー３−８にて上昇して曲げロール２の鼓形ロール２−１、２−２より上側に待機する（図９参照）。 When the tube W with fins to be processed is fed for a certain length, the clamp jig 5-5 of the inlet guide 5 is closed to clamp the tube, and at the same time, the pressing die 3 of the other rotary / lifting pressing die 3 is now turned on. −10 is lowered to the side surface position of the tube W with the work fin by the cylinder 3-8 as described above, and at the same time, the bending roller 2 is pressed while pressing the tube with the work fin with the rotary actuator 3-2 on this side. The drum roll 2-1 rotates along the outer periphery of the drum roll 2-1 and bends the tube into a U shape and stops. At this position, the pressing die 3-10 rises in the cylinder 3-8 and the drum roll of the bending roll 2 2-1 and wait above 2-2 (see FIG. 9).

一方、送りガイド６は被加工フィン付きチューブＷを定寸送り後、即座にクランプ治具６−５が開き被加工フィン付きチューブＷを解放した状態で、可逆モータ６−２が逆方向に駆動して可動台６−１が後退し元の位置に戻る。 On the other hand, the feed guide 6 is driven by the reversible motor 6-2 in the reverse direction while the clamp jig 6-5 is opened immediately after the tube W with the fin to be processed is fixedly fed and the tube W with the fin to be processed is released. Then, the movable base 6-1 moves backward and returns to the original position.

次に、再び入口ガイド５のクランプ治具５−５が開き被加工フィン付きチューブＷを解放すると同時に、送りガイド６のクランプ治具６−５が閉じて可動台６−１が可逆モータ６−２により一定ストローク前進し被加工フィン付きチューブＷを一定長さ送る（図１０参照）。そして、入口ガイド５のクランプ治具５−５が閉じて該チューブをクランプすると同時に、一方の回動・昇降式押圧ダイ３の一方の押圧ダイ３−９が前記と同様、シリンダー３−７により被加工フィン付きチューブＷの側面位置まで下降し、この側のロータリーアクチュエータ３−１にて被加工フィン付きチューブＷを押圧しながら当該チューブをＵ字形に折り曲げられる（図１１参照）。同時に押圧ダイ３−９がシリンダー３−７により上昇して曲げロール２の上側に待機する。 Next, the clamp jig 5-5 of the inlet guide 5 is opened again to release the tube W with fins to be processed. 2 to advance the tube W with fins to be processed by a certain length (see FIG. 10). Then, the clamp jig 5-5 of the inlet guide 5 is closed to clamp the tube, and at the same time, one of the pressing dies 3-9 of the rotating / elevating pressing die 3 is moved by the cylinder 3-7 as described above. The tube W with the workpiece fin is lowered to the side surface position, and the tube with the workpiece fin W is pressed by the rotary actuator 3-1 on this side, and the tube is bent into a U shape (see FIG. 11). At the same time, the pressing die 3-9 rises by the cylinder 3-7 and stands by above the bending roll 2.

続いて、送りガイド６にて被加工フィン付きチューブＷが一定長さ送られ、回動・昇降式押圧ダイ３の他方の押圧ダイ３−１０にて被加工フィン付きチューブＷがＵ字形に折り曲げられる。 Subsequently, the tube W with the fin to be processed is fed by the feed guide 6 for a certain length, and the tube W with the fin to be processed is bent into a U shape by the other pressing die 3-10 of the rotary / lifting pressing die 3. It is done.

以後上記と同様に、Ｕ字形曲げ→定寸送り→Ｕ字形曲げ→定寸送りと繰返されてフィン付き蛇行チューブが形成される（図１２参照）。 Thereafter, in the same manner as described above, the fin-shaped meandering tube is formed by repeating U-shaped bending → fixed feed → U-shaped bend → fixed feed (see FIG. 12).

次に、１段分のフィン付き蛇行チューブの曲げ加工が終了すると、被加工フィン付きチューブＷを再び送りガイド６にて一定長さ送った後、前記昇降式チューブ受けテーブル４を所定ストローク下降位置させた状態で、送りガイド６の円筒体回動装置６−６にて当該円筒体６−４を円周方向に所定の角度揺動させて１段目のフィン付き蛇行チューブＷ−１を曲げロール２の鼓形ロール２−１、２−２を支点に下側に揺動させて、当該フィン付き蛇行チューブＷ−１を前記昇降式チューブ受けテーブル４の水平板部４−１で受けて所定角度に傾斜保持する（図１３参照）。 Next, when the bending of the meandering tube with fins for one stage is completed, the tube W with fins to be processed is again fed by the feed guide 6 for a predetermined length, and then the elevating tube receiving table 4 is moved to a predetermined stroke lowering position. In this state, the cylindrical body 6-4 of the feed guide 6 is swung by a predetermined angle in the circumferential direction to bend the meandering tube W-1 with fins in the first stage. The drum-shaped rolls 2-1 and 2-2 of the roll 2 are swung downward with the fulcrum as a fulcrum, and the finned meandering tube W-1 is received by the horizontal plate portion 4-1 of the elevating tube receiving table 4. The tilt is held at a predetermined angle (see FIG. 13).

そして、この状態で再び前記と同様に回動・昇降式押圧ダイ３と曲げロール２により被加工フィン付きチューブをＵ字形に曲げ加工して２段目に連続する立上り部Ｗａを上側に形成する（図１４参照）。このようにして立上り部Ｗａを形成すると、昇降式チューブ受けテーブル４を上昇させて前記１段目のフィン付き蛇行チューブＷ−１を当該テーブルの水平板部４−１で水平状態に保持した状態で、再び被加工フィン付きチューブを送りガイド６にて管軸線方向に一定長さ送った後、このチューブ送りガイド６の円筒体回動装置６−６にて当該円筒体６−４を所定角度さらに回動させて１段目のフィン付き蛇行チューブＷ−１をさらに揺動して水平状態とする（図１５参照）。その後、回動・昇降式押圧ダイ３の他方の押圧ダイ３−１０にて再び被加工フィン付きチューブをＵ字形に曲げ加工する（図１６参照）。続いて、被加工フィン付きチューブＷを再び送りガイド６にて一定長さ送った後、回動・昇降式押圧ダイ３と曲げロール２にて前記と同様被加工フィン付きチューブがＵ字形に折り曲げられ２段目フィン付き蛇行チューブＷ−２の一部分が形成される（図１７参照）。そして、再び、Ｕ字形曲げ→定寸送り→Ｕ字形曲げ→定寸送りを繰返して２段目のフィン付き蛇行チューブＷ−２を形成する。この時、２段目のフィン付き蛇行チューブＷ−２は、１段目のフィン付き蛇行チューブＷ−１のほぼ真上に相重なるように形成される。 In this state, similarly to the above, the tube with fins to be processed is bent into a U shape by the rotation / lifting pressing die 3 and the bending roll 2 to form the rising portion Wa continuous in the second stage on the upper side. (See FIG. 14). When the rising portion Wa is formed in this way, the elevating tube receiving table 4 is raised, and the first-stage finned meandering tube W-1 is held in a horizontal state by the horizontal plate portion 4-1 of the table. Then, after the tube with fins to be processed is again fed by the feed guide 6 for a certain length in the tube axis direction, the cylindrical body 6-4 is moved at a predetermined angle by the cylindrical body rotating device 6-6 of the tube feed guide 6. Further rotation is performed to further swing the first-stage finned meandering tube W-1 to a horizontal state (see FIG. 15). Thereafter, the finned tube is again bent into a U shape by the other pressing die 3-10 of the rotary / lifting pressing die 3 (see FIG. 16). Subsequently, after the tube W with the fin to be processed is again fed by the feed guide 6 for a certain length, the tube with the fin to be processed is bent into a U shape in the same manner as described above by the rotary / lifting pressing die 3 and the bending roll 2. A part of the second-stage finned meandering tube W-2 is formed (see FIG. 17). Then, the second-stage finned meandering tube W-2 is formed again by repeating U-shaped bending → fixed feed → U-shaped bend → fixed feed. At this time, the second-stage finned meandering tube W-2 is formed so as to overlap with the first-stage finned meandering tube W-1.

以後、前記と同様の被加工フィン付きチューブのＵ字形曲げ加工動作と、フィン付き蛇行チューブの重ね段の間隔（立上り部Ｗａの長さ）および重ね段数に応じて昇降式チューブ受けテーブル４の上下方向の移動ストロークおよび水平板部４−１の位置のサーボ制御が繰り返されることにより、フィン付き蛇行チューブを連続して多段に曲げ加工することができる（図１８参照）。 Thereafter, the U-shaped bending operation of the tube with fins to be processed is the same as described above, and the vertical movement of the elevating tube receiving table 4 according to the interval between the overlapping steps of the meandering tube with fins (the length of the rising portion Wa) and the number of overlapping steps. By repeating servo control of the moving stroke in the direction and the position of the horizontal plate portion 4-1, the finned meandering tube can be bent continuously in multiple stages (see FIG. 18).

このように、本発明によれば、フィン付き蛇行チューブの多段化を下方に向って曲げ、その曲げられたフィン付き蛇行チューブを下からテーブルで受けてフィン付き蛇行チューブを連続して多段に曲げ加工することができるので、フィン付き蛇行チューブの重ね段数が増えてもフィン付き蛇行チューブの変形や振動を防止することができ、また、Ｕ字形曲げ加工時に発生するひねりを昇降式テーブルで抑制することができ、さらにフィン付き蛇行チューブを重ねる時の揺動角度を昇降式テーブルで安定させることが可能となる等、多段重ねフィン付き蛇行チューブの加工および形状の安定化に多大な効果を奏する。 As described above, according to the present invention, the multi-stage of the finned meandering tube is bent downward, the bent finned meandering tube is received by the table from below, and the finned meandering tube is continuously bent in multiple stages. Since it can be processed, deformation and vibration of the finned meandering tube can be prevented even if the number of finned meandering tubes increases, and the twisting generated during U-shaped bending is suppressed by the lifting table. In addition, it is possible to stabilize the swing angle when the meandering tubes with fins are overlapped by a liftable table, and the like, which has a great effect on the processing and the stabilization of the shape of the meandering tube with multistage fins.

本発明のフィン付き蛇行チューブの多段重ね曲げ加工技術は、フィン付き蛇行チューブを曲げロールの下方に順次折り重ねていく方式を採用したことにより、曲げ加工時に発生する捻りを抑制することができる上、フィン付き蛇行チューブの重ね段数が増えてもフィン付き蛇行チューブを吊す吊具等を必要とすることなくフィン付き蛇行チューブの変形や振動を防止して曲げ加工動作を安定させることができるので、常に安定した形状の多段重ね曲げ加工が可能となるという点で優れている。また、本発明のフィン付き蛇行チューブの多段重ね曲げ加工技術は、フィン付き蛇行チューブに限らず、フィンのない通常の蛇行チューブの多段重ね曲げ加工にも応用できる。 The multistage lap bending technology for the finned meandering tube of the present invention employs a method of sequentially folding the finned meandering tube below the bending roll, thereby suppressing the twisting that occurs during the bending. , Even if the number of stages of the finned meandering tube increases, it is possible to stabilize the bending process operation by preventing deformation and vibration of the finned meandering tube without requiring a hanging tool etc. It is excellent in that multi-stage bending with a stable shape is always possible. Moreover, the multistage lap bending technique of the meandering tube with fins of the present invention can be applied not only to the meandering tube with fins but also to the multistage lap bending of ordinary meandering tubes without fins.

この発明の一実施例装置を一部破断して示す概略側面図である。1 is a schematic side view showing a partially broken apparatus according to an embodiment of the present invention. 同上装置を一部破断して示す概略正面図である。It is a schematic front view which partially fractures and shows an apparatus same as the above. 同上装置の曲げロール部および入口ガイド部を拡大して示す図で、（ａ）は概略平面図、（ｂ）は概略側面図である。It is a figure which expands and shows the bending roll part and entrance guide part of an apparatus same as the above, (a) is a schematic plan view, (b) is a schematic side view. 同上装置の被加工フィン付きチューブ送りガイドを拡大して示す概略正面図である。It is a schematic front view which expands and shows the tube feed guide with a to-be-processed fin of an apparatus same as the above. 同上の被加工フィン付きチューブ送りガイドの概略背面図である。It is a schematic rear view of the tube feed guide with a to-be-processed fin same as the above. 図１に示す装置に被加工フィン付きチューブをセットした状態を装置下側から見た状態を示す概略図である。It is the schematic which shows the state which looked at the state which set the tube with a workpiece fin to the apparatus shown in FIG. 1 from the apparatus lower side . 図６に示す状態から被加工フィン付きチューブをＵ字形に曲げ加工した状を示す概略図である。It is the schematic which shows the shape which bent the tube with a to-be-processed fin in the U-shape from the state shown in FIG. 図７に示す状態で被加工フィン付きチューブを定寸送りした状態を示す概略図である。It is the schematic which shows the state which carried out the fixed dimension feeding of the tube with a workpiece fin in the state shown in FIG. 図８に示す状態から被加工フィン付きチューブをＵ字形に曲げ加工した状態を示す概略図である。It is the schematic which shows the state which bent the tube with to-be-processed fins in the U-shape from the state shown in FIG. 図９に示す状態から被加工フィン付きチューブを定寸送りした状態を示す概略図である。It is the schematic which shows the state which carried out the fixed dimension feeding of the tube with to-be-processed from the state shown in FIG. 図１０に示す状態から被加工フィン付きチューブをＵ字形に曲げ加工した状態を示す概略図である。It is the schematic which shows the state which bent the tube with a to-be-processed fin in the U-shape from the state shown in FIG. １段分のフィン付き蛇行チューブの曲げ加工が終了した状態を示す概略図である。It is the schematic which shows the state which the bending process of the meandering tube with a fin for 1 step | paragraph completed. １段目のフィン付き蛇行チューブを図１２の状態から下側に回動させて所定の角度に傾斜保持した状態を示す概略正面図である。FIG. 13 is a schematic front view showing a state in which the first-stage finned meandering tube is rotated downward from the state of FIG. 12 and inclined and held at a predetermined angle. ２段目に連続する立上り部を曲げ加工した状態を示す概略正面図である。It is a schematic front view which shows the state which carried out the bending process of the standing | starting-up part continued to the 2nd step | paragraph. 被加工フィン付きチューブをさらに回動して水平とした状態を示す概略正面図である。It is a schematic front view which shows the state which further rotated the tube with to-be-processed fins, and was made horizontal. ２段目のフィン付き蛇行チューブをＵ字形に曲げ加工した状態を示す概略正面図である。It is a schematic front view which shows the state which bent the 2nd-stage finned meandering tube into the U-shape. 図１６に示す状態から被加工フィン付きチューブを次のＵ字形曲げ加工した状態を示す概略正面図である。It is a schematic front view which shows the state which bent the tube with a to-be-processed fin from the state shown in FIG. フィン付き蛇行チューブを２段に重ねた状態を示す概略斜視図である。It is a schematic perspective view which shows the state which accumulated the meandering tube with a fin in two steps.

符号の説明Explanation of symbols

１機台
１−１水平架台
１−２Ｌ形架台
１−３支持板
１−４台板
２曲げロール
３回動・昇降式押圧ダイ
４昇降式チューブ受けテーブル
５入口ガイド
６被加工フィン付きチューブ送りガイド
Ｗ被加工フィン付きチューブ
Ｗ−１１段目のフィン付き蛇行チューブ
Ｗ−２２段目のフィン付き蛇行チューブ
Ｗａ立上り部 DESCRIPTION OF SYMBOLS 1 Machine 1-1 Horizontal stand 1-2 L-shaped stand 1-3 Support plate 1-4 Base plate 2 Bending roll 3 Rotating and raising / lowering type press die 4 Elevating type tube receiving table 5 Inlet guide 6 Tube with processed fin Feed guide W Worked fin tube W-1 First stage finned meander tube W-2 Second stage finned meander tube Wa Rising part

Claims

被加工フィン付きチューブを蛇行状に折曲げ、かつその蛇行状に折曲げたフィン付き蛇行チューブと相重なるように連続して被加工フィン付きチューブを蛇行状に折曲げ、以後同様にしてフィン付き蛇行チューブを連続して多段に重ね曲げ加工する方法において、被加工フィン付きチューブを管軸線方向に所定長さ間欠送りしながら、当該フィン付きチューブを上下動可能なテーブルの同一水平面上で左右一対の曲げロールに沿って回動・昇降式押圧ダイにて交互にＵ字形に曲げ加工してフィン付き蛇行チューブを形成し、１段分のフィン付き蛇行チューブ曲げ加工終了時、被加工フィン付きチューブを管軸線方向に一定長さ送った後、前記上下動可能なテーブルを下降させて１段目のフィン付き蛇行チューブを前記曲げロール部を支点に下方に回動させて傾斜保持した状態で前記回動・昇降式押圧ダイにて被加工フィン付きチューブをＵ字形に曲げ加工して２段目に連続する立上り部を下側に形成し、次いで前記テーブルを上昇させて前記１段目のフィン付き蛇行管を当該テーブル上面で水平状態に保持した状態で、再び被加工フィン付きチューブを管軸線方向に所定長さ間欠送りしながら、当該フィン付きチューブを前記テーブル面上で左右一対の曲げロールに沿って回動・昇降式押圧ダイにて交互にＵ字形に曲げ加工して２段目のフィン付き蛇行チューブを前記１段目のフィン付き蛇行チューブのほぼ真上に相重なるように形成し、以後前記と同様の動作を繰返してフィン付き蛇行チューブを連続して多段に曲げ加工することを特徴とするフィン付き蛇行チューブの多段重ね曲げ加工方法。 The tube with the fin to be processed is bent in a serpentine shape, and the tube with the fin to be processed is continuously bent in a serpentine shape so as to overlap the serpentine tube with the fin bent in the serpentine shape. In the method of bending the meandering tube continuously in multiple stages, a pair of left and right on the same horizontal surface of the table that can move the finned tube up and down while intermittently feeding the tube with the fin to be processed in the tube axis direction for a predetermined length. A bending serpentine tube with fins is formed by alternately bending into a U-shape with a rotating and elevating pressure die along the bending roll of the tube. After feeding a certain length in the tube axis direction, the table that can be moved up and down is lowered, and the first-stage finned meandering tube is lowered with the bending roll portion as a fulcrum. The tube with fins to be processed is bent into a U shape with the rotary / lifting type pressing die in a state of being tilted and held in a tilted state, and a rising portion continuous to the second stage is formed on the lower side. While the table is lifted and the first stage finned meandering tube is held in a horizontal state on the upper surface of the table, the finned tube is again fed intermittently for a predetermined length in the tube axis direction. Is bent into a U-shape alternately by a rotating / lifting pressing die along a pair of right and left bending rolls on the table surface, and the second-stage finned serpentine tube is converted into the first-stage finned serpentine tube. A multi-layered stack of serpentine tubes with fins, characterized in that they are formed so as to overlap with each other, and thereafter the same operation as described above is repeated to bend the serpentine tubes with fins continuously in multiple stages. Under the processing method.

被加工フィン付きチューブを蛇行状に折曲げ、かつその蛇行状に折曲げたフィン付き蛇行チューブと相重なるように連続して被加工フィン付きチューブを蛇行状に折曲げ、以後同様にしてフィン付き蛇行チューブを連続して多段に重ね曲げ加工する装置において、同一水平面上に垂直に配置した左右一対の曲げロールと、該曲げロールと同一回転軸に一定角度回動可能に取付けられたアームに昇降可能に立設された一対の回動・昇降式押圧ダイと、前記曲げロールの真下に配置された昇降式チューブ受けテーブルと、前記曲げロールの入側に該ロールと同一水平面上に配設され、かつ該ロール間と同一軸線上に配設され、被加工フィン付きチューブを一定ストローク前後動させる被加工フィン付きチューブ送りガイドとから構成され、前記送りガイドを貫通して曲げロールに通した直線状の被加工フィン付きチューブを前記送りガイドにより管軸線方向に一定長さ間欠的に送りながら、前記回動・昇降式押圧ダイにより該チューブを交互にＵ字形に曲げ加工してフィン付き蛇行チューブを形成し、１段目のフィン付き蛇行チューブ曲げ加工終了時に前記チューブ受けテーブルを所定の高さ位置に下降させて該フィン付き蛇行チューブを下方に回動させて傾斜保持した状態で、被加工フィン付きチューブをＵ字形に曲げ加工して２段目に連続する立上り部を下側に形成した後、前記チューブ受けテーブルを所定の高さ位置に上昇させて再び被加工フィン付きチューブを一定長さ間欠送りしながら２段目のフィン付き蛇行チューブを１段目のフィン付き蛇行チューブのほぼ真上に相重なるように形成し、以後前記と同様の動作を繰返して前記チューブ受けテーブル上にフィン付き蛇行チューブを連続して多段に曲げ加工する方式となしたことを特徴とするフィン付き蛇行チューブの多段重ね曲げ加工装置。 The tube with the fin to be processed is bent in a serpentine shape, and the tube with the fin to be processed is continuously bent in a serpentine shape so as to overlap the serpentine tube with the fin bent in the serpentine shape. In an apparatus for bending and bending meandering tubes in multiple stages in succession, a pair of left and right bending rolls arranged vertically on the same horizontal plane, and an arm attached to the same rotation axis as the bending roll so as to be able to rotate at a fixed angle, are raised and lowered. A pair of pivotable / elevating pressure dies that are erected, an elevating tube receiving table disposed directly under the bending roll, and on the same horizontal plane as the roll on the entry side of the bending roll. And a tube feed guide with processed fins, which is disposed on the same axis as between the rolls and moves the tube with processed fins back and forth for a fixed stroke. The tube with the straight fin to be processed that passes through the guide and passes through the bending roll is intermittently sent in the tube axis direction by the feed guide for a certain length, and the tube is alternately turned by the rotary / lifting pressure die. A serpentine tube with fins is formed by bending into a U-shape, and when the first stage of serpentine tube with fins is bent, the tube receiving table is lowered to a predetermined height position and the serpentine tube with fins is rotated downward. In a state where it is moved and held in an inclined state, the tube with fins to be processed is bent into a U-shape to form a rising portion continuous in the second stage, and then the tube receiving table is raised to a predetermined height position. Then, while the tube with fins to be processed is again intermittently fed for a certain length, the second-stage serpentine tube with fins overlaps almost directly above the first-stage serpentine tube with fins. After that, the same operation as described above is repeated to bend the meandering tube with fins continuously on the tube receiving table in a multistage bending manner. Processing equipment.

前記曲げロールは、機台に垂直に並設した２本の回転軸の下端にそれぞれ別々に取着され、前記回動・昇降式押圧ダイは、前記２本の回転軸に別々に取付けられた垂直シリンダーにそれぞれ上下動可能に垂直に接続された支持ロッドの下端に取着された構成となすことを特徴とする請求項２記載のフィン付き蛇行チューブの多段重ね曲げ加工装置。 The bending rolls are separately attached to the lower ends of two rotating shafts arranged side by side perpendicularly to the machine base, and the rotary / elevating pressure die is separately attached to the two rotating shafts. 3. The multistage lap bending apparatus for finned meandering tubes according to claim 2, wherein the fins are attached to lower ends of support rods vertically connected to vertical cylinders so as to be vertically movable.

前記昇降式チューブ受けテーブルは、機台に設置したモータまたは流体圧シリンダーを駆動源とする昇降機構にて上下動可能に水平に支持され、曲げ加工時の上下方向のストロークおよびテーブル高さをサーボ制御する仕組みとなしていることを特徴とする請求項２または３記載のフィン付き蛇行チューブの多段重ね曲げ加工装置。 The elevating tube receiving table is supported horizontally by an elevating mechanism that uses a motor or a hydraulic cylinder installed in the machine as a drive source, and servos the vertical stroke and table height during bending. 4. The multistage lap bending apparatus for a meandering tube with fins according to claim 2 or 3, characterized by being controlled.