JP2008188602A - Method and apparatus for working tubular member - Google Patents

Method and apparatus for working tubular member Download PDF

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JP2008188602A
JP2008188602A JP2007022824A JP2007022824A JP2008188602A JP 2008188602 A JP2008188602 A JP 2008188602A JP 2007022824 A JP2007022824 A JP 2007022824A JP 2007022824 A JP2007022824 A JP 2007022824A JP 2008188602 A JP2008188602 A JP 2008188602A
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tubular member
circumferential direction
cross
sectional shape
locally
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JP5250878B2 (en
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Kenichi Manabe
真鍋　　健一
Takeshi Furushima
剛 古島
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Tama TLO Co Ltd
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Tama TLO Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for working a tubular member by which the tubular member is thinned down while deforming the cross-sectional shape of the tubular member without using a die because the tubular member before drawing and the tubular member after drawing are approximately the same shape in the cross-sectional shape in a conventional dieless drawing and the cross-sectional shape can not be deformed. <P>SOLUTION: The tubular member 10 is thinned down while deforming the cross-sectional shape by drawing the tubular member 10 without using the die while locally heating the member in the peripheral direction. It is preferable to cool the atmosphere situated in the surroundings of the locally heated part in the peripheral direction of the tubular member 10. When n places separated each other in the peripheral direction are heated, the cross-sectional shape of the tubular member after drawing becomes a hollow n-polygon. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ダイスを用いずに管状部材の断面形状を変形しつつ該管状部材を細管化する管状部材の加工方法及び管状部材加工装置に関する。   The present invention relates to a method for processing a tubular member and a tubular member processing apparatus that make the tubular member thin while deforming the cross-sectional shape of the tubular member without using a die.

管状部材を細管化する従来の方法として、ダイスを用いないダイレス引抜きがある。ダイレス引抜きは、管状部材の一部を周方向に均等に誘導加熱しつつ引抜くことにより、管状部材を高温部で延伸させて細管化する方法である（例えば特許文献１参照）。   As a conventional method for thinning a tubular member, there is a dieless drawing without using a die. Dieless drawing is a method in which a tubular member is drawn out while being uniformly induction-heated in the circumferential direction so that the tubular member is drawn at a high-temperature portion to form a thin tube (see, for example, Patent Document 1).

特開２００４−３３２１０７号公報（第６段落）JP 2004-332107 A (6th paragraph)

従来のダイレス引抜きによれば、引抜き前の管状部材と引抜き後の管状部材は、断面形状が略同一の形状であり、断面形状を変形すること、例えば円筒状の管を断面が四角形の中空管に変形することはできなかった。   According to the conventional dieless drawing, the tubular member before drawing and the tubular member after drawing have substantially the same cross-sectional shape, and the cross-sectional shape is deformed, for example, a cylindrical tube is hollow with a square cross-section. It could not be transformed into a tube.

本発明は上記のような事情を考慮してなされたものであり、その目的は、ダイスを用いずに管状部材の断面形状を変形しつつ該管状部材を細管化することができる、管状部材の加工方法及び管状部材加工装置を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tubular member that can be thinned while deforming the cross-sectional shape of the tubular member without using a die. It is in providing a processing method and a tubular member processing apparatus.

上記課題を解決するため、本発明に係る管状部材の加工方法は、管状部材を、周方向に局所的に加熱し、周方向に変形抵抗差を与えつつダイスなしで引抜くことにより、前記管状部材を、断面形状を変形しつつ細管化する方法である。   In order to solve the above-mentioned problems, a method for processing a tubular member according to the present invention includes: heating the tubular member locally in the circumferential direction and pulling out the tube without a die while giving a difference in deformation resistance in the circumferential direction. In this method, the member is thinned while changing the cross-sectional shape.

加工前の前記管状部材は円筒形であり、前記管状部材は、引抜き時に、周方向に互いに離間したｎ箇所を加熱される場合、引抜き後の前記管状部材の断面形状は、中空のｎ角形である。ここでのｎ角形には、角部に円形部分が残っている場合も含む。ｎは自然数である。   The tubular member before processing has a cylindrical shape, and when the tubular member is heated at n positions spaced apart from each other in the circumferential direction during drawing, the sectional shape of the tubular member after drawing is a hollow n-gonal shape. is there. The n-gon shape here includes a case where a circular portion remains in the corner portion. n is a natural number.

前記管状部材のうち周方向に局所的に加熱されている部分の周囲に位置する雰囲気を冷却しつつ、前記管状部材を引抜くのが好ましい。前記管状部材のうち、局所的に加熱されている領域の相互間に位置する領域を局所的に冷却しつつ、前記管状部材を引抜いてもよい。   It is preferable to pull out the tubular member while cooling the atmosphere located around the portion of the tubular member that is locally heated in the circumferential direction. You may pull out the said tubular member, cooling the area | region located between the area | regions heated locally among the said tubular members locally.

本発明に係る管状部材加工装置は、管状部材を、周方向に局所的に加熱する第１の加熱手段と、
周方向に局所的に加熱されている前記管状部材を長手方向に引抜く引抜き手段と、
を具備する。
前記第１の加熱手段は、例えば加熱用のレーザーを前記管状部材の周方向に局所的に照射する。 The tubular member processing apparatus according to the present invention includes a first heating means for locally heating the tubular member in the circumferential direction;
A drawing means for drawing out in a longitudinal direction the tubular member that is locally heated in the circumferential direction;
It comprises.
The first heating means irradiates, for example, a heating laser locally in the circumferential direction of the tubular member.

前記管状部材のうち、前記第１の加熱手段で加熱される部分とは長手方向に別の部分を加熱する第２の加熱手段を具備してもよい。   You may comprise the 2nd heating means which heats another part in the longitudinal direction from the part heated with the said 1st heating means among the said tubular members.

本発明によれば、前記管状部材は引抜き時に周方向に局所的に加熱されている為、前記管状部材を、ダイスなしで断面形状を変形しつつ細管化することができる。   According to the present invention, since the tubular member is locally heated in the circumferential direction at the time of drawing, the tubular member can be made into a thin tube without deforming the cross-sectional shape.

以下、図面を参照して本発明の実施形態について説明する。図１（Ａ）は、本発明の第１の実施形態に係る管状部材の加工方法を説明するための断面図である。本図は管状部材の長手方向の断面を示している。また図１（Ｂ）は、図１（Ａ）のＡ−Ａ´断面図であり、図１（Ｃ）は図１（Ａ）のＢ−Ｂ´断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a cross-sectional view for explaining a method of processing a tubular member according to the first embodiment of the present invention. This figure has shown the cross section of the longitudinal direction of a tubular member. 1B is a cross-sectional view taken along the line AA ′ in FIG. 1A, and FIG. 1C is a cross-sectional view taken along the line BB ′ in FIG.

これらの図に示す管状部材の加工方法は、管状部材１０の長手方向の一部に、周方向に局所的にレーザーを照射することにより、管状部材１０を周方向に局所的に加熱し、この状態で管状部材１０を引抜いくことにより、管状部材１０より細管の管状部材１１をダイスなしで製造する方法である。管状部材１０の局所的な加熱温度は、管状部材１０の材質によって変わるが、管状部材１０の周方向に必要な大きさの変形抵抗差を与えることができる温度以上であるのが好ましい。管状部材１１の引抜き速度Ｖ１は、管状部材１０の供給速度Ｖ２より速い。 The processing method of the tubular member shown in these drawings is that the tubular member 10 is locally heated in the circumferential direction by irradiating a part of the tubular member 10 in the longitudinal direction with a laser locally in the circumferential direction. This is a method of manufacturing a tubular member 11 having a narrower tube than the tubular member 10 without a die by drawing the tubular member 10 in a state. The local heating temperature of the tubular member 10 varies depending on the material of the tubular member 10, but is preferably equal to or higher than a temperature that can provide a necessary deformation resistance difference in the circumferential direction of the tubular member 10. The drawing speed V 1 of the tubular member 11 is faster than the supply speed V 2 of the tubular member 10.

引抜き時に管状部材１０は周方向に局所的に加熱されている為、管状部材１０には周方向に変形抵抗差が与えられ、管状部材１１の断面形状は管状部材１０の断面形状とは異なる形状になる。本図に示す例では、管状部材１０には、周方向に９０°間隔で離間した４箇所にレーザーが照射され、円柱状の管状部材１０が、断面形状が中空の正方形である管状部材１１に引抜かれる。なお、ここでの正方形には、角部に円形部分が残っている場合も含まれている。管状部材１１の用途としては、無痛注射針、MEMS部品、μ-TAS部品、マイクロ熱交換器、放電加工用の電極管、マイクロノズル、ノズル、ヘッドレスト、レーザー加速器等がある。   Since the tubular member 10 is locally heated in the circumferential direction at the time of drawing, a difference in deformation resistance is given to the tubular member 10 in the circumferential direction, and the sectional shape of the tubular member 11 is different from the sectional shape of the tubular member 10. become. In the example shown in this figure, the tubular member 10 is irradiated with laser at four locations spaced apart by 90 ° in the circumferential direction, and the cylindrical tubular member 10 is turned into the tubular member 11 having a hollow square cross-sectional shape. Pulled out. In addition, the case where the circular part remains in a corner | angular part is also included in the square here. Applications of the tubular member 11 include painless injection needles, MEMS parts, μ-TAS parts, micro heat exchangers, electrode tubes for electric discharge machining, micro nozzles, nozzles, headrests, laser accelerators, and the like.

管状部材１０がレーザーによって加熱されている部分の周囲に位置する雰囲気は、冷却手段（例えばクーラー）を用いて冷却されている。これにより、管状部材１０のうち、加熱されている部分の相互間に位置する領域の温度が上昇することを抑制できる。   The atmosphere located around the portion where the tubular member 10 is heated by the laser is cooled using a cooling means (for example, a cooler). Thereby, it can suppress that the temperature of the area | region located between the parts heated among the tubular members 10 rises.

尚、管状部材１０の加工を開始してから、管状部材１１の引抜き速度及び管状部材１０の供給速度それぞれを定常状態であるＶ１，Ｖ２にするまでの時間は、ある程度長いほうが良い。これにより、引抜き開始直後に管状部材１１の断面形状が不安定になることを抑制できる。また、管状部材１０の結晶粒が小さいほど、管状部材１１の表面粗さは小さくなる。 It should be noted that the time from when the processing of the tubular member 10 is started until the pulling speed of the tubular member 11 and the supply speed of the tubular member 10 are set to V 1 and V 2 , which are steady states, is preferably longer to some extent. Thereby, it can suppress that the cross-sectional shape of the tubular member 11 becomes unstable immediately after the drawing start. Further, the smaller the crystal grain of the tubular member 10, the smaller the surface roughness of the tubular member 11.

図２は、図１を用いて説明した管状部材の加工方法に用いられる管状部材加工装置のレーザー照射系の一例を示す図である。本図に示す管状加工装置は、管状部材１０，１１を長手方向に移動（引抜き）させる移動手段（図示せず）と、図２に示すレーザー照射系を有している。図２に示すレーザー照射系は、一つのレーザー光源２０から照射されたレーザーを、３つのハーフミラー２１を用いて４つのレーザーに分割し、分割後の４つのレーザーを、複数の全反射ミラー２２を用いて図１に示した位置に照射するものである。   FIG. 2 is a diagram illustrating an example of a laser irradiation system of a tubular member processing apparatus used in the tubular member processing method described with reference to FIG. The tubular processing apparatus shown in this figure has a moving means (not shown) for moving (pulling out) the tubular members 10 and 11 in the longitudinal direction, and a laser irradiation system shown in FIG. The laser irradiation system shown in FIG. 2 divides a laser emitted from one laser light source 20 into four lasers using three half mirrors 21, and the divided four lasers are a plurality of total reflection mirrors 22. 1 is used to irradiate the position shown in FIG.

以上、本実施形態によれば、管状部材１０は引抜き時に周方向に局所的に加熱されている為、引抜きによって形成される管状部材１１の断面形状を、管状部材１０の断面形状とは異なる形状にすることができる。   As described above, according to the present embodiment, since the tubular member 10 is locally heated in the circumferential direction at the time of drawing, the cross-sectional shape of the tubular member 11 formed by drawing is different from the cross-sectional shape of the tubular member 10. Can be.

尚、レーザー照射系は図２に示した照射系に限定されるものではなく、例えば４つのレーザー光源から照射された４つのレーザーを、直接図１に示した位置に照射するものであってもよい。この場合、図示しない制御部を用いて各レーザー光源の出力、スポット系、及び照射位置を制御するのが好ましい。例えば、レーザー光源を移動させること、又はレーザー光源と管状部材１０の間に配置された光学系を構成する部材を移動させたり角度を変えたりすることにより、レーザーの照射位置を適切に制御しつつ移動させることが可能になる。   Incidentally, the laser irradiation system is not limited to the irradiation system shown in FIG. 2, and for example, four lasers irradiated from four laser light sources may be irradiated directly to the position shown in FIG. Good. In this case, it is preferable to control the output of each laser light source, the spot system, and the irradiation position using a control unit (not shown). For example, the laser irradiation position can be appropriately controlled by moving the laser light source, or by moving or changing the angle of the member constituting the optical system disposed between the laser light source and the tubular member 10. It can be moved.

また、管状部材１１の形状は上記した形状に限定されず、管状部材１０が周方向に互いに離間したｎ箇所を加熱されている場合、管状部材１１の断面形状は、中空のｎ角形になる。ただしｎは自然数である。例えば図３（Ａ）に示すように、管状部材１０が周方向に互いに離間した３箇所を加熱されている場合、図３（Ｂ）に示すように、管状部材１１の断面形状は、中空の３角形になる。なお、ここでのｎ角形には、角部に円形部分が残っている場合も含む。   In addition, the shape of the tubular member 11 is not limited to the above-described shape, and when the tubular member 10 is heated at n positions spaced apart from each other in the circumferential direction, the cross-sectional shape of the tubular member 11 is a hollow n-gon. However, n is a natural number. For example, as shown in FIG. 3 (A), when the tubular member 10 is heated at three locations that are spaced apart from each other in the circumferential direction, the cross-sectional shape of the tubular member 11 is hollow as shown in FIG. 3 (B). It becomes a triangle. Here, the n-gon shape includes a case where a circular portion remains in the corner portion.

図４は、本発明の第２の実施形態に係る管状部材の加工方法を説明するための断面図である。以下、第１の実施形態と同様の構成については同一の符号を付し、説明を省略する。   FIG. 4 is a cross-sectional view for explaining a method for processing a tubular member according to the second embodiment of the present invention. Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

本図に示す加工方法は、管状部材１０より断面形状が大きい管状部材１２の長手方向の一部を、全周にわたって加熱しつつ、管状部材１２をダイレスで引抜くことにより管状部材１０を製造し、その直後に第１の実施形態で示した加工方法を行って管状部材１１を製造する方法である。管状部材１２の供給速度Ｖ３は、管状部材１０の供給速度すなわち引抜き速度Ｖ２より遅い。 In the processing method shown in this figure, the tubular member 10 is manufactured by drawing the tubular member 12 in a dieless manner while heating a part of the longitudinal direction of the tubular member 12 having a larger cross-sectional shape than the tubular member 10 over the entire circumference. Immediately thereafter, the tubular member 11 is manufactured by performing the processing method shown in the first embodiment. The supply speed V 3 of the tubular member 12 is slower than the supply speed of the tubular member 10, that is, the drawing speed V 2 .

本実施形態で用いられる管状部材加工装置は、第１の実施形態で用いた管状部材加工装置の手前に、管状部材１２の一部を全周にわたって加熱する手段を追加した構成である。管状部材１２の一部を全周にわたって加熱する手段は、例えば誘導加熱コイル２３及び冷却手段２４（例えば水冷手段や空冷手段）を用いた誘導加熱手段であるが、図１と同様のレーザー照射系においてレーザーのスポット径を大きくしたものであっても良い。   The tubular member processing apparatus used in the present embodiment has a configuration in which means for heating a part of the tubular member 12 over the entire circumference is added before the tubular member processing apparatus used in the first embodiment. A means for heating a part of the tubular member 12 over the entire circumference is, for example, an induction heating means using an induction heating coil 23 and a cooling means 24 (for example, a water cooling means or an air cooling means), but the same laser irradiation system as in FIG. In this case, the laser spot diameter may be increased.

本実施形態によれば、管状部材１２を２段で引抜いて管状部材１１を製造している為、管状部材１２に対する管状部材１１の減面率を高くすることができる。また管状部材１１の引抜き速度Ｖ１を高速化することができる。尚、管状部材の引抜き段数は２段に限定されるものではなく、３段以上であっても良い。この場合、少なくともいずれか一つの引抜き工程は、第１の実施形態で説明した引抜き工程になる。 According to this embodiment, since the tubular member 11 is manufactured by pulling out the tubular member 12 in two steps, the area reduction rate of the tubular member 11 with respect to the tubular member 12 can be increased. The removal speed V 1 of the tubular member 11 can be increased. The number of drawing stages of the tubular member is not limited to two, but may be three or more. In this case, at least one drawing process is the drawing process described in the first embodiment.

図５は、本発明の第３の実施形態に係る管状部材の加工方法を説明するための断面図である。以下、第１の実施形態と同様の構成については同一の符号を付し、説明を省略する。   FIG. 5 is a cross-sectional view for explaining a method of processing a tubular member according to the third embodiment of the present invention. Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

本実施形態に示す加工方法は、管状部材１０のうちレーザーによって加熱されている部分の相互間に位置する領域を、冷却手段２５を用いて局所的に冷却する点を除いて、第１の実施形態と同様である。冷却手段２５は第２の実施形態における冷却手段２４と略同様の構成であるが、管状部材１０の周方向ではなく長手方向に沿って配置されている点が異なる。なお本実施形態では、管状部材１０がレーザーによって加熱されている部分の周囲に位置する雰囲気を冷却しなくても良い。   The processing method shown in the present embodiment is the first implementation except that the region located between the portions of the tubular member 10 heated by the laser is locally cooled using the cooling means 25. It is the same as the form. The cooling unit 25 has substantially the same configuration as the cooling unit 24 in the second embodiment, except that the cooling unit 25 is arranged not in the circumferential direction but in the longitudinal direction of the tubular member 10. In this embodiment, the atmosphere located around the portion where the tubular member 10 is heated by the laser need not be cooled.

本実施形態によっても第１の実施形態と同様の効果を得ることができる。また、管状部材１０のうち、加熱されている部分の相互間に位置する領域の温度が上昇することを抑制し、引抜きによって形成される管状部材１１の断面形状と、管状部材１０の断面形状の差をさらに大きくすることができる。   According to this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, it suppresses that the temperature of the area | region located among the heated parts among the tubular members 10 suppresses, the cross-sectional shape of the tubular member 11 formed by drawing, and the cross-sectional shape of the tubular member 10 The difference can be further increased.

尚、本発明は上述した実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々変更して実施することが可能である。   Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

（Ａ）は第１の実施形態に係る管状部材の加工方法を説明するための断面図、（Ｂ）は（Ａ）のＡ−Ａ´断面図、（Ｃ）は（Ａ）のＢ−Ｂ´断面図。(A) is sectional drawing for demonstrating the processing method of the tubular member which concerns on 1st Embodiment, (B) is AA 'sectional drawing of (A), (C) is BB of (A). 'Cross sectional view. 図１を用いて説明した管状部材の加工方法に用いられる管状部材加工装置のレーザー照射系の一例を示す図。The figure which shows an example of the laser irradiation system of the tubular member processing apparatus used for the processing method of the tubular member demonstrated using FIG. （Ａ）及び（Ｂ）は第１の実施形態の変形例を説明するための図。(A) And (B) is a figure for demonstrating the modification of 1st Embodiment. 第２の実施形態に係る管状部材の加工方法を説明するための断面図。Sectional drawing for demonstrating the processing method of the tubular member which concerns on 2nd Embodiment. 第３の実施形態に係る管状部材の加工方法を説明するための断面図。Sectional drawing for demonstrating the processing method of the tubular member which concerns on 3rd Embodiment.

符号の説明Explanation of symbols

１０，１１，１２…管状部材、２０…レーザー光源、２１…ハーフミラー、２２…全反射ミラー、２３…誘導加熱コイル、２４，２５…冷却手段 DESCRIPTION OF SYMBOLS 10, 11, 12 ... Tubular member, 20 ... Laser light source, 21 ... Half mirror, 22 ... Total reflection mirror, 23 ... Induction heating coil, 24, 25 ... Cooling means

Claims (7)

管状部材を、周方向に局所的に加熱し、周方向に変形抵抗差を与えつつダイスなしで引抜くことにより、前記管状部材を、断面形状を変形しつつ細管化する管状部材の加工方法。   A method of processing a tubular member, in which the tubular member is locally heated in the circumferential direction and pulled out without a die while giving a deformation resistance difference in the circumferential direction, whereby the tubular member is thinned while deforming the cross-sectional shape. 加工前の前記管状部材は円筒形であり、
前記管状部材は、引抜き時に、周方向に互いに離間したｎ箇所を加熱され、
引抜き後の前記管状部材の断面形状は、中空のｎ角形である請求項１に記載の管状部材の加工方法。ただしｎは自然数。 The tubular member before processing is cylindrical,
The tubular member is heated at n points spaced apart from each other in the circumferential direction during drawing,
The method for processing a tubular member according to claim 1, wherein a cross-sectional shape of the tubular member after drawing is a hollow n-gon. Where n is a natural number. 前記管状部材のうち周方向に局所的に加熱されている部分の周囲に位置する雰囲気を冷却しつつ、前記管状部材を引抜く請求項１又は２に記載の管状部材の加工方法。   The method for processing a tubular member according to claim 1 or 2, wherein the tubular member is pulled out while cooling an atmosphere located around a portion of the tubular member that is locally heated in the circumferential direction. 前記管状部材のうち、局所的に加熱されている領域の相互間に位置する領域を局所的に冷却しつつ、前記管状部材を引抜く請求項１〜３のいずれか一項に記載の管状部材の加工方法。   The tubular member according to any one of claims 1 to 3, wherein the tubular member is pulled out while locally cooling the regions located between the locally heated regions of the tubular member. Processing method. 管状部材を、周方向に局所的に加熱する第１の加熱手段と、
周方向に局所的に加熱されている前記管状部材を長手方向に引抜く引抜き手段と、
を具備する管状部材加工装置。 First heating means for locally heating the tubular member in the circumferential direction;
A drawing means for drawing out in a longitudinal direction the tubular member that is locally heated in the circumferential direction;
A tubular member processing apparatus comprising: 前記第１の加熱手段は、加熱用のレーザーを前記管状部材の周方向に局所的に照射する請求項５に記載の管状部材加工装置。   The tubular member processing apparatus according to claim 5, wherein the first heating unit locally irradiates a heating laser in a circumferential direction of the tubular member. 前記管状部材のうち、前記第１の加熱手段で加熱される部分とは長手方向に別の部分を加熱する第２の加熱手段を具備する請求項５又は６に記載の管状部材加工装置。   7. The tubular member processing apparatus according to claim 5, further comprising a second heating unit that heats a portion of the tubular member that is different from a portion heated by the first heating unit in a longitudinal direction.
JP2007022824A 2007-02-01 2007-02-01 Tubular member processing method and tubular member processing apparatus Expired - Fee Related JP5250878B2 (en)

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JPH01118306A (en) * 1987-10-30 1989-05-10 Kawasaki Heavy Ind Ltd Manufacture of tightly bonded multi-layer pipe
JPH01181915A (en) * 1988-01-12 1989-07-19 Kawasaki Steel Corp Method and apparatus for manufacturing welded tube
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WO2022014515A1 (en) * 2020-07-17 2022-01-20 ダイキン工業株式会社 Heat exchanger
JP2022019458A (en) * 2020-07-17 2022-01-27 ダイキン工業株式会社 Heat exchanger
JP7140988B2 (en) 2020-07-17 2022-09-22 ダイキン工業株式会社 Heat exchanger
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