この発明に係る螺旋状波形溝付管は、円管の外周面に、該円管の長手方向に沿う少なくとも一条の螺旋状波形の溝部と、その溝部の底部長手方向に断続的に形成された前記円管の径方向の外側変形部と、からなる径方向に２段の変形部分が設けられ、前記円管の内周面には前記溝部に対応する螺旋状波形の突条部と、その突条部に形成された前記外側変形部に対応する長手方向に断続的な径方向の内側変形部と、からなる径方向に２段の変形部分が設けられたことを特徴とするものである。
また、この発明に係る熱交換器は、円管の外周面に、該円管の長手方向に沿う少なくとも一条の螺旋状波形の溝部と、その溝部の底部長手方向に断続的に形成された前記円管の径方向の外側変形部と、からなる径方向に２段の変形部分が設けられ、前記円管の内周面には前記溝部に対応する螺旋状波形の突条部と、その突条部に形成された前記外側変形部に対応する長手方向に断続的な径方向の内側変形部と、からなる径方向に２段の変形部分が設けられた螺旋状波形溝付管を用いたものである。
また、この発明に係る螺旋状波形溝付管の製造方法は、所定位置に保持されるワークとしての円管の外周部に少なくとも一つ配設され、該円管の管軸方向に対して所定角度傾斜された軸の周りに回転自在に保持されたローラーからなっていて、該ローラーの周方向に外周面から径方向に突出して設けられた少なくとも一つの突起を有する加工ツールを、前記円管の外周面に押付けた状態で、前記円管の管軸方向に転動させることで、前記円管の外周面に、管軸方向に沿う少なくとも一条の螺旋状波形の溝部と、その溝部の底部を更に前記円管の中心方向に断続的に凹ませた前記突起に対応する複数の窪みと、を形成して螺旋状波形溝付管を得るようにしたものである。
The spiral corrugated grooved tube according to the present invention is formed on the outer peripheral surface of the circular tube intermittently in the longitudinal direction of at least one spiral corrugated groove along the longitudinal direction of the circular tube and the bottom of the groove. A radially outer deformed portion of the circular pipe, and a two-stage deformed portion is provided in the radial direction, and a spiral corrugated ridge corresponding to the groove portion on the inner peripheral surface of the circular pipe; A two-stage deformed portion is provided in the radial direction, the inner deformed portion being intermittent in the longitudinal direction corresponding to the outer deformed portion formed on the protruding portion, and the radially deformed portion. is there.
Further, the heat exchanger according to the present invention is formed on the outer peripheral surface of the circular tube intermittently in the longitudinal direction of at least one spiral corrugated groove along the longitudinal direction of the circular tube and in the longitudinal direction of the bottom of the groove. A radially outer deformed portion of the circular pipe, and a two-stage deformed portion in the radial direction is provided; a spiral corrugated ridge corresponding to the groove portion on the inner peripheral surface of the circular pipe; and Using a spiral corrugated grooved tube provided with a radially deformed inner deformed portion corresponding to the outer deformed portion formed on the ridge, and a radially deformed two-stage deformed portion. It was.
Further, in the manufacturing method of the spiral corrugated grooved tube according to the present invention, at least one is arranged on the outer peripheral portion of the circular tube as a work held at a predetermined position, and the predetermined method is applied to the tube axial direction of the circular tube. A processing tool comprising a roller rotatably held around an angle-inclined axis, the processing tool having at least one protrusion provided radially protruding from an outer peripheral surface in a circumferential direction of the roller; In a state of being pressed against the outer peripheral surface of the tube, by rolling in the tube axial direction of the circular tube, at least one spiral corrugated groove along the tube axial direction on the outer peripheral surface of the circular tube, and the bottom of the groove And a plurality of depressions corresponding to the protrusions that are intermittently dented in the center direction of the circular tube to form a spiral corrugated grooved tube.
上記のように、実施の形態１の螺旋状波形溝付管の製造方法は、該円管の管軸Ｏ方向に対して所定の傾斜角度θで傾斜された加工ツール傾斜軸Ｏ４の周りに回転自在に保持された円盤状のローラーからなり、そのローラー外周部４ａから径方向に突出された突起５を有する加工ツール４を、円管１００の外表面１１０に押付ける一方、円管の管軸Ｏ方向における加工ツール４によって成形が進行する側に位置する未加工部を回転不能かつ管軸方向にのみ移動可能に係止して、円管１００と加工ツール４の支軸（図示省略）との間に相対的な捻り駆動力を与えることで、加工ツール４が従動的に転動されて円管の外表面１１０に、管軸方向に沿う螺旋状波形状の溝部１１と、その溝部１１の底部を更に円管の中心方向に断続的に凹ませた突起５に対応する複数の窪み１２と、が１工程で形成された螺旋状波形溝付管１を得るようにしたものである。
As described above, the manufacturing method of the helical wave grooved tube of the first embodiment, the rotation about the machining tool tilt axis O4 of the tube axis O of the circular tube is inclined at a predetermined inclination angle θ While pressing the processing tool 4 which consists of the disk-shaped roller hold | maintained freely and has the processus | protrusion 5 which protruded in the radial direction from the roller outer peripheral part 4a against the outer surface 110 of the circular tube 100, the tube axis | shaft of a circular tube An unprocessed portion positioned on the side where molding proceeds in the O direction is locked so that it cannot rotate and can only move in the tube axis direction, and the shaft 100 and the support shaft (not shown) of the processing tool 4 by giving relative twisting drive force between the machining tool 4 is in the external surface surface 110 of the circular tube is driven to rolling, the helical wave-shaped groove 11 along the tube axis direction, the groove portions Projection 5 in which the bottom of 11 is further recessed intermittently toward the center of the tube A corresponding plurality of recesses 12, but is obtained so as to obtain a spiral waveform grooved tube 1 formed in one step.
１、１Ａ、１Ｂ 螺旋状波形溝付管、１００ 円管、１１０ 外表面、１０ 外周面、１１（１１Ａ、１１Ｂ、１１Ｃ、１１Ｄ）、１１Ｅ 溝部、１２ 窪み、
１２Ａ 円形状の窪み、１２Ｂ 楕円形状の窪み、
１２Ｃ 底部がフラットな楕円形状の窪み、１２Ｄ 非対称楕円形状の窪み、
２０ 内周面、２１、２１Ｅ 突条部、２２ 突部、２２Ａ 円形状の突部、
２２Ｂ 楕円形状の突部、２２Ｃ 富士山形の突部、２２Ｄ 非対称楕円形状の突部、
３ 爪、４、４Ａ 加工ツール、４ａ ローラー外周部、５、５Ａ、５Ｂ、５Ｃ、５Ｄ 突起、Ｄ１２ 窪みの深さ、Ｆ 位相差、Ｈ５ 突起高さ、Ｈ２２ 突部の高さ、
Ｐ５ 突起ピッチ、Ｐ１１ 溝ピッチ、Ｏ 管軸、Ｏ４ 加工ツール傾斜軸、
θ 傾斜角度。
1, 1A, 1B Spiral corrugated grooved tube, 100 circular tube, 110 outer surface, 10 outer peripheral surface, 11 (11A, 11B, 11C, 11D), 11E groove, 12 recess,
12A Circular recess, 12B Oval recess,
12C Elliptical depression with flat bottom, 12D Asymmetric elliptic depression,
20 inner peripheral surface, 21, 21E ridge, 22 protrusion, 22A circular protrusion,
22B Ellipse-shaped protrusion, 22C Fuji-mountain protrusion, 22D Asymmetric ellipse-shaped protrusion,
3 claw, 4 , 4A processing tool, 4a roller outer periphery 5, 5A, 5B, 5C, 5D protrusion, D12 depth of depression, F phase difference, H5 protrusion height, H22 protrusion height,
P5 protrusion pitch, P11 groove pitch, O tube axis, O4 machining tool tilt axis,
θ Tilt angle.