JP3014432B2 - Heat transfer tube manufacturing method - Google Patents

Heat transfer tube manufacturing method

Info

Publication number
JP3014432B2
JP3014432B2 JP2285665A JP28566590A JP3014432B2 JP 3014432 B2 JP3014432 B2 JP 3014432B2 JP 2285665 A JP2285665 A JP 2285665A JP 28566590 A JP28566590 A JP 28566590A JP 3014432 B2 JP3014432 B2 JP 3014432B2
Authority
JP
Japan
Prior art keywords
heat transfer
transfer tube
roll
processing
rolls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2285665A
Other languages
Japanese (ja)
Other versions
JPH04158193A (en
Inventor
孝司 山本
利明 橋爪
寛 川口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THE FURUKAW ELECTRIC CO., LTD.
Original Assignee
THE FURUKAW ELECTRIC CO., LTD.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by THE FURUKAW ELECTRIC CO., LTD. filed Critical THE FURUKAW ELECTRIC CO., LTD.
Priority to JP2285665A priority Critical patent/JP3014432B2/en
Publication of JPH04158193A publication Critical patent/JPH04158193A/en
Application granted granted Critical
Publication of JP3014432B2 publication Critical patent/JP3014432B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Description

【発明の詳細な説明】 「産業上の利用分野」 本発明は、主として冷凍機や空調機などの熱交換器に
使用される伝熱管の製造方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a heat transfer tube mainly used for a heat exchanger such as a refrigerator or an air conditioner.

「従来の技術」 この種の熱交換器に使用される伝熱管は、管内でフレ
オンその他の冷媒を蒸発又は凝縮させ、管外を流れる流
体との間で熱交換を行なうもので、伝熱性能を高めるた
め内面に多数の微細な凹凸を形成したいわゆる内面溝付
き伝熱管が使用されている。"Prior art" The heat transfer tubes used in this type of heat exchanger are those that evaporate or condense freon or other refrigerant inside the tubes and exchange heat with the fluid flowing outside the tubes. A so-called heat transfer tube with an inner groove having a large number of fine irregularities formed on the inner surface is used in order to increase the surface roughness.

内面溝付き管を製造する従来方法は大別して二種あ
り、その一つは、素管を管軸に沿い一定方向へ移動させ
ながら、周面に所定のリード角をもつ無数の溝を形成し
た回転自在な溝付きプラグを素管内に挿入し、このプラ
グ位置において、素管の外周を公転しつつ遊転する複数
のロール又はボールで素管を外周より前記溝付きプラグ
の表面へ押圧するものであった。Conventional methods of manufacturing a tube with an inner groove are roughly classified into two types, one of which is forming an infinite number of grooves having a predetermined lead angle on the peripheral surface while moving the raw tube in a fixed direction along the tube axis. Inserting a rotatable grooved plug into the base tube, and pressing the base tube from the outer periphery to the surface of the grooved plug with a plurality of rolls or balls revolving around the outer periphery of the base tube at this plug position Met.

また、従来の製造方法の他の一つは、所定幅の金属帯
板を一定方向へ定速で繰り出しながら、表面に多数の溝
ないし凹凸を形成した加工ロールと、表面が平滑な加圧
ロールとの間に前記金属帯板を挟んでその一面に無数の
凹凸ないし溝を形成し、この金属帯板を前記凹凸ないし
溝が内側になるように幅方向へ丸めて順次管状に成形
し、その突き合せ部分を順次溶接するものであった。Another conventional manufacturing method is a processing roll in which a number of grooves or irregularities are formed on the surface while a metal strip having a predetermined width is unwound in a constant direction at a constant speed, and a pressure roll having a smooth surface. The metal strip is sandwiched between them to form an infinite number of irregularities or grooves on one surface thereof, and the metal strip is rolled in the width direction so that the irregularities or grooves are on the inner side, and sequentially formed into a tubular shape. The butted portions were sequentially welded.

このような製造方法によれば、管軸方向に一定のリー
ド角をもつ同ピッチ，同形状，同寸法の多数の溝が形成
された伝熱管が製造される。According to such a manufacturing method, a heat transfer tube having a large number of grooves having the same pitch, the same shape, and the same size and having a constant lead angle in the tube axis direction is manufactured.

「発明が解決しようとする課題」 近年この種の伝熱管については、機器の小型化及び高
性能化が要求されているのに伴ない、伝熱性能の一層の
向上が要求されているが、従来の製造方法による伝熱管
は、内面に形成される溝のリード角，ピッチ，形状等が
一定であるため、伝熱性能の向上には限界があった。"Problems to be Solved by the Invention" In recent years, with regard to this type of heat transfer tube, further improvement in heat transfer performance has been demanded with the demand for miniaturization and higher performance of equipment. In the heat transfer tube manufactured by the conventional manufacturing method, since the lead angle, pitch, shape, and the like of the groove formed on the inner surface are constant, there is a limit in improving the heat transfer performance.

本発明の目的は、従来の内面溝付き管より伝熱性能が
より向上した伝熱管の製造方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a heat transfer tube having improved heat transfer performance as compared with a conventional tube with an inner groove.

「課題を解決するための手段」 本発明による伝熱管の製造方法は、前述のような目的
を達成するための伝熱管であって内面へ長さ方向に沿っ
て所定幅で三種以上の凹凸群を形成し、当該各凹凸群は
平行して交互に形成された多数の凸条と溝であり、隣合
う凹凸群は溝ピッチ，溝寸法，溝形状及び溝の管軸方向
に対するリード角の各要素のうちのいずれか一以上の要
素を異にしており、各凹凸群において溝底からの高さが
最も高い凸条の高さが約0.2mmである構成の伝熱管を円
滑に製造するために、金属帯板を一定方向へ繰り出しな
がら、周面に多数の平行な凸条を形成した加工ロールと
表面が平滑な加圧ロールとに挟んで平行して交互に位置
する多数の凸条と溝からなる凹凸を前記金属帯板の一面
へ加工する工程と、前記金属帯板を前記凹凸の加工面が
内側になるように順次幅方向に丸めて管状に成形する工
程と、前記金属帯板の突き合わせ部分を溶接する工程と
を含み、前記加工ロールは三個以上のロールを同軸に取
り外し可能に両側から締付けた状態で取り付けた組み合
わせロールであり、加工ロールの隣合うロールは、それ
らの周面に形成された凸条がピッチ，寸法，断面形状及
び軸方向に対するリード角の各要素のうちのいずれか一
以上の要素を異にしていることを特徴としている。[Means for Solving the Problems] A method for manufacturing a heat transfer tube according to the present invention is a heat transfer tube for achieving the above-described object, and has three or more types of irregularities having a predetermined width along a length direction on an inner surface thereof. And each of the concavo-convex groups is a large number of ridges and grooves alternately formed in parallel, and adjacent concavo-convex groups are each of a groove pitch, a groove dimension, a groove shape, and a lead angle of the groove with respect to the tube axis direction. In order to smoothly manufacture a heat transfer tube having a configuration in which one or more of the elements are different, and the height of the highest ridge from the groove bottom in each uneven group is about 0.2 mm. While rolling out the metal strip in a certain direction, a large number of ridges are alternately arranged in parallel with a processing roll having a large number of parallel ridges formed on the peripheral surface and a smooth pressure roll with the surface interposed therebetween. Processing irregularities formed of grooves on one surface of the metal strip; A step of sequentially rolling in the width direction so that the work surface is on the inside and forming a tubular shape, and a step of welding the butt portion of the metal strip, wherein the processing roll is capable of removing three or more rolls coaxially. A combination roll attached in a state of being tightened from both sides, and adjacent rolls of the processing rolls have ridges formed on their peripheral surfaces with pitch, size, cross-sectional shape, and lead angle with respect to the axial direction. It is characterized in that any one or more elements are different.

「作用」 本発明の製造方法に係る伝熱管によれば、内面へ長さ
方向に沿って所定幅で三種以上の凹凸群を形成し、各凹
凸群は平行して交互に形成された多数の凸条と溝であ
り、隣合う凹凸群は溝ピッチ，溝寸法，溝形状及び溝の
管軸方向に対するリード角の各要素のうちのいずれか一
以上の要素を異にしており、各凹凸群において溝底から
の高さが最も高い凸条の高さが約0.2mmであるので、従
来の内面溝付の伝熱管よりも管内の冷媒の流れがよく乱
れ、その結果伝熱性能がより向上する。"Action" According to the heat transfer tube according to the production method of the present invention, three or more types of unevenness groups are formed on the inner surface with a predetermined width along the length direction, and each unevenness group is formed in a number of parallel and alternately formed. The adjacent ridges and grooves are different in at least one of the following factors: groove pitch, groove size, groove shape, and lead angle of the groove with respect to the tube axis direction. The height of the ridge, which is the highest from the groove bottom, is about 0.2 mm, so the refrigerant flow in the tube is more disturbed than the conventional heat transfer tube with internal grooves, resulting in better heat transfer performance I do.

本発明に係る伝熱管の製造方法によれば、金属帯板の
一面へ凹凸を加工するための加工ロールが、三個以上の
ロールを同軸に取り外し可能に両面から締付けた状態で
取り付けた組み合わせロールであり、加工ロールの隣合
うロールは、それらの周面に形成された凸条がピッチ，
寸法，断面形状及び軸方向に対するリード角の各要素の
うちのいずれか一以上の要素を異にしているので、管の
内面に形成された隣合う凹凸群が、溝ピッチ，形状，寸
法及び管軸方向に対するリード角のうちのいずれか一つ
以上の要素を異にしている伝熱管を円滑に量産すること
ができる。According to the method for manufacturing a heat transfer tube according to the present invention, a processing roll for processing irregularities on one surface of a metal strip is a combination roll in which three or more rolls are detachably mounted coaxially and fastened from both surfaces. In the rolls adjacent to the processing rolls, the ridges formed on their peripheral surfaces have a pitch,
Since at least one of the elements of the dimensions, cross-sectional shape, and lead angle with respect to the axial direction is different, the adjacent unevenness group formed on the inner surface of the pipe has a groove pitch, a shape, a dimension, and a pipe. It is possible to smoothly mass-produce heat transfer tubes having at least one element different from the lead angle with respect to the axial direction.

加工ロールは、三個以上のロールを同軸へ両側から締
め付けた状態で取り付けた組み合わせロールであるの
で、いずれかのロールが破損した場合や、いずれかのロ
ールが急速に磨耗しあるいは磨耗が進行した場合には、
故障のあるロールのみを簡単に取り替えて使用すること
ができ、高価な加工ロールが有効に使用される。The processing roll is a combination roll with three or more rolls attached coaxially and tightened from both sides, so if one of the rolls breaks, or one of the rolls wears out quickly or wears out in case of,
Only defective rolls can be easily replaced and used, and expensive processing rolls are effectively used.

「実施例」 以下図面を参照して本発明の好適な実施例を説明す
る。"Example" Hereinafter, a preferred example of the present invention will be described with reference to the drawings.

第１図は本発明の製造方法に係る伝熱管の一実施例を
示す部分拡大展開斜視図であって、溝底肉厚t1が0.25m
m,外径9.53mmの銅管よりなる伝熱管１の内面には、管軸
方向イに沿い所定幅の凹凸群1a,1b,1a,1bが交互に形成
されている。FIG. 1 is a partially enlarged exploded perspective view showing one embodiment of the heat transfer tube according to the manufacturing method of the present invention, wherein the groove bottom wall thickness t1 is 0.25 m.
On the inner surface of the heat transfer tube 1 made of a copper tube having an outer diameter of 9.53 mm, irregularities 1a, 1b, 1a, 1b having a predetermined width are alternately formed along the tube axis direction A.

凹凸群1a,1bはそれぞれ多数の平行な交互の凸条11,12
と溝11a,12aとによって構成されており、一方の凹凸群1
aを構成する凸条11は、高さ（溝深さ）h1が0.2mm,ピッ
チp1が0.6mm,管軸方向イに対するリード角θ１が18度で
あり、他方の凹凸群1bを構成する凸条12は、高さH2,ピ
ッチp2は凸条11と同じでリード角θ２を凸条11とは逆に
している。The uneven groups 1a and 1b are each composed of a number of parallel alternating ridges 11 and 12.
And grooves 11a and 12a.
The protruding ridges 11 constituting the a have a height (groove depth) h1 of 0.2 mm, a pitch p1 of 0.6 mm, a lead angle θ1 with respect to the tube axis direction a of 18 degrees, and the other convex / concave group 1b. The ridge 12 has the same height H2 and pitch p2 as the ridge 11, and the lead angle θ2 is opposite to that of the ridge 11.

この実施例の伝熱管１は、凹凸群1aと凹凸群1bにおけ
るそれぞれの凸条11,12のリード角θ1,θ２が異なって
いるので内部の冷媒の流れがより乱れ易く、伝熱性能を
向上させることができる。In the heat transfer tube 1 of this embodiment, since the lead angles θ1 and θ2 of the ridges 11 and 12 in the unevenness group 1a and the unevenness group 1b are different, the flow of the internal refrigerant is more easily disturbed, and the heat transfer performance is improved. Can be done.

この実施例の伝熱管１を製造するには、第５図のよう
に、所定幅の銅板よりなる金属帯板２を一定方向へ定速
で繰り出しながら、同一の軸33へ交互に配置されかつ両
側から締付けて固定され、周面に多数の溝（凹凸）31,3
2をそれぞれ形成したロール3a,3b,3a,3bからなる加工ロ
ール３と、この加工ロール３へ圧接された加圧ロール４
とに挟んで、当該金属帯板２の上面へ凹凸群1a,1b,1a,1
bを長手方向に沿い所定幅で交互にかつ連続的に形成す
る。In order to manufacture the heat transfer tubes 1 of this embodiment, as shown in FIG. 5, the metal strips 2 made of a copper sheet having a predetermined width are alternately arranged on the same shaft 33 while being fed at a constant speed in a constant direction. Tightened and fixed from both sides, a large number of grooves (uneven) on the peripheral surface
2, a processing roll 3 composed of rolls 3a, 3b, 3a, 3b, and a pressing roll 4 pressed against the processing roll 3.
, The irregularities 1a, 1b, 1a, 1
b are alternately and continuously formed at a predetermined width along the longitudinal direction.

溝31,32の造管後の管軸方向イに対するリード角θa,
θｂは前記溝11a,12aのリード角θ1,θ２と、またそれ
らの寸法等は凸条11,12の寸法とそれぞれ対応するよう
に形成しておく。The lead angles θa,
.theta.b is formed so as to correspond to the lead angles .theta.1, .theta.2 of the grooves 11a, 12a, and their dimensions and the like correspond to the dimensions of the ridges 11, 12, respectively.

前記のように凹凸群1a,1bを上面に形成した金属帯板
２を、図示しない成形ロール群により順次幅方向に丸め
て管状に成形し、次いで、その突き合せ部分を高周波誘
導溶接,Tig溶接その他の溶接手段５により連続的に溶接
し、これを前記繰出方向に沿って移動させながら縮径手
段６に通して順次縮径し、外径9.53mmの伝熱管１を製造
する。The metal strip 2 having the irregularities 1a and 1b formed on the upper surface as described above is sequentially rolled in the width direction by a forming roll group (not shown) to form a tube, and then the butted portions are subjected to high-frequency induction welding and Tig welding. The welding is continuously performed by other welding means 5, and the diameter of the heat transfer tube 1 is reduced by passing through the diameter reducing means 6 while moving along the feeding direction to produce the heat transfer tube 1 having an outer diameter of 9.53 mm.

第２図は本発明の製造方法に係る伝熱管の他の実施例
を示す部分拡大展開斜視図であって、最大溝底肉厚t3が
0.30mm,最小溝底肉厚t4が0.25mm,外径9.53mmの銅管より
なる伝熱管１の内面には、管軸方向イに沿う所定幅の凹
凸群1c,1d,1c,1dが交互に形成されている。FIG. 2 is a partially enlarged exploded perspective view showing another embodiment of the heat transfer tube according to the manufacturing method of the present invention, wherein the maximum groove bottom thickness t3 is
A group of irregularities 1c, 1d, 1c, 1d having a predetermined width along the pipe axis direction A are alternately formed on the inner surface of the heat transfer tube 1 made of a copper tube having a diameter of 0.30mm, a minimum groove bottom thickness t4 of 0.25mm, and an outer diameter of 9.53mm. Is formed.

凹凸群1c,1dはそれぞれ多数の平行な交互の凸条13,14
と溝13a,14aとによって構成されており、一方の凹凸群1
cを構成する凸条13は、高さ（溝深さ）h3が0.2mm,ピッ
チp3が0.6mm,管軸方向イに対するリード角θ３が18度で
あり、他方の凹凸群1dを構成する凸条14は、高さh4,リ
ード角θ４を凸条13と同じくするが、ピッチp4は0.4mm
に設定されている。The uneven groups 1c and 1d are each composed of a number of parallel alternating ridges 13 and 14.
And grooves 13a, 14a, and one of the unevenness groups 1
The convex ridge 13 constituting c has a height (groove depth) h3 of 0.2 mm, a pitch p3 of 0.6 mm, a lead angle θ3 with respect to the tube axis direction a of 18 degrees, and the other convex / concave group 1d. The ridge 14 has the same height h4 and lead angle θ4 as the ridge 13, but the pitch p4 is 0.4 mm.
Is set to

この実施例の伝熱管は、凹凸群1c,1dにおけるそれぞ
れの凸条13,14について、溝底肉厚t3,t4及びピッチp3,p
4をそれぞれ異にしているので、内部の冷媒の流れがよ
り乱れ易く、伝熱性能を向上させることができる。The heat transfer tube of this embodiment has a groove bottom thickness t3, t4 and a pitch p3, p for each of the ridges 13 and 14 in the uneven groups 1c and 1d.
Since 4 is different from each other, the flow of the internal refrigerant is more likely to be disturbed, and the heat transfer performance can be improved.

第３図は本発明の製造方法に係る伝熱管のさらに他の
実施例を示す部分拡大展開斜視図であって、溝底肉厚t5
が0.30mm,外径9.53mmの銅管よりなる伝熱管１の内面に
は、管軸方向イに沿って所定幅の凹凸群1e,1f,1e,1fが
交互に形成されている。FIG. 3 is a partially enlarged exploded perspective view showing still another embodiment of the heat transfer tube according to the manufacturing method of the present invention.
On the inner surface of the heat transfer tube 1 made of a copper tube having a diameter of 0.30 mm and an outer diameter of 9.53 mm, irregularities 1e, 1f, 1e, 1f having a predetermined width are alternately formed along the tube axis direction A.

凹凸群1e,1fはそれぞれ多数の平行な凸条15,16と溝15
a,16aによって構成されており、一方の凹凸群1eを構成
する凸条15は、高さ（溝深さ）h5が0.2mm,ピッチp5が0.
6mm,管軸方向イに対するリード角θ５が18度であり、他
方の凹凸群1fを構成する凸条16は、リード角θ6,ピッチ
p6を凸条15とそれぞれ同じくするが、高さ（溝深さ）h6
が0.1mmに設定されている。The uneven groups 1e and 1f are each composed of a number of parallel ridges 15, 16 and grooves 15.
a, 16a, and the ridge 15 constituting one of the unevenness groups 1e has a height (groove depth) h5 of 0.2 mm and a pitch p5 of 0.
6 mm, the lead angle θ5 with respect to the pipe axis direction a is 18 degrees, and the ridge 16 constituting the other unevenness group 1f has a lead angle θ6, pitch
p6 is the same as ridge 15, but the height (groove depth) h6
Is set to 0.1 mm.

この実施例の伝熱管１は、凹凸群1e,1fにおける凸条1
5,16の高さh5,h6がそれぞれ異なるので、内部の冷媒の
流れがより乱れ易く、したがって伝熱性能をより向上さ
せることができる。The heat transfer tube 1 according to this embodiment has the ridges 1 in the uneven groups 1e and 1f.
Since the heights h5 and h6 of the 5, 16 are different from each other, the flow of the internal refrigerant is more likely to be disturbed, so that the heat transfer performance can be further improved.

第４図は本発明の製造方法に係る伝熱管のさらに他の
実施例を示す部分拡大展開斜視図であって、溝底肉厚t7
が0.30mm,外径9.53mmの銅管よりなる伝熱管１の内面に
は、管軸方向イに沿って所定幅の凹凸群1g,1h,1g,1hが
交互に形成されている。FIG. 4 is a partially enlarged developed perspective view showing still another embodiment of the heat transfer tube according to the manufacturing method of the present invention, and has a groove bottom thickness t7.
On the inner surface of the heat transfer tube 1 made of a copper tube having a diameter of 0.30 mm and an outer diameter of 9.53 mm, irregularities 1g, 1h, 1g, 1h having a predetermined width are alternately formed along the tube axis direction A.

凹凸群1g,1hはそれぞれ多数の平行な凸条17,18と溝17
a,18aによって構成されており、一方の凹凸群1gを構成
する凸条17は、高さ（溝深さ）h7が0.2mm,ピッチp7が0.
6mm,管軸方向イに対するリード角θ７が90度であり、他
方の凹凸群1gを構成する凸条18は、高さ（溝深さ）h8,
ピッチp8を凸条17とそれぞれ同じくするが、リード角θ
８は前者の90度に対し45度に設定されている。The uneven groups 1g and 1h have a large number of parallel ridges 17 and 18 and grooves 17 respectively.
a, 18a, and the ridge 17 constituting one of the unevenness groups 1g has a height (groove depth) h7 of 0.2 mm and a pitch p7 of 0.
6 mm, the lead angle θ7 with respect to the tube axis direction a is 90 degrees, and the ridge 18 constituting the other unevenness group 1g has a height (groove depth) h8,
The pitch p8 is the same as that of the ridge 17, but the lead angle θ
8 is set to 45 degrees with respect to the former 90 degrees.

この実施例の伝熱管１は、凹凸群1g,1hにおける凸条1
7,18のリード角θ7,θ８が異なっているので、内部の冷
媒の流れがより乱れ易く、したがって伝熱性能をより向
上させることができる。The heat transfer tube 1 according to this embodiment has the ridges 1 in the uneven groups 1g and 1h.
Since the lead angles θ7 and θ8 are different from each other, the flow of the internal refrigerant is more likely to be disturbed, so that the heat transfer performance can be further improved.

内面へ管軸方向に対するリード角（20度），凸条の高
さ（0.2mm），溝底肉厚（0.3mm），ピッチ（0.47mm）を
一定にした外径9.53mmの銅管よりなる従来構造の伝熱管
を製造するとともに、第１図〜第４図の実施例の伝熱管
１のサンプルEx・１〜Ex・４を準備し、それぞれ二重管
式熱交換器に組み込んで伝熱性能を測定したところ、第
７図及び第８図のような結果を得た。The inner surface consists of a copper tube with an outer diameter of 9.53 mm with a constant lead angle (20 degrees) to the tube axis direction, the height of the ridge (0.2 mm), the thickness of the groove bottom (0.3 mm), and the pitch (0.47 mm). In addition to manufacturing a heat transfer tube having a conventional structure, samples Ex.1 to Ex.4 of the heat transfer tube 1 of the embodiment shown in FIGS. When the performance was measured, the results shown in FIGS. 7 and 8 were obtained.

この結果からも明らかなように、前記実施例の伝熱管
は、従来の内面加工伝熱管より管内上発熱伝達率及び管
内凝縮熱伝達率ともにはるかに向上する。As is clear from these results, the heat transfer tube of the above embodiment has much higher heat transfer coefficient and heat transfer coefficient in the pipe than the conventional inner surface processed heat transfer pipe.

第２図〜第４図の実施例における伝熱管についても、
第５図の各加工ロール3a,3bにおける溝31,32のサイズ又
はピッチ若しくはリード角をそれぞれの実施例のものに
合せれば、第５図の要領で製造することができる。The heat transfer tube in the embodiment shown in FIGS.
If the size, pitch, or lead angle of the grooves 31, 32 in each of the processing rolls 3a, 3b in FIG. 5 is adjusted to those of the respective embodiments, it can be manufactured as shown in FIG.

前記実施例の伝熱管において、各凹凸群1a〜1hの幅
は、管内周長のほぼ1/3以下に設定するのが好ましい。In the heat transfer tube of the above embodiment, it is preferable that the width of each of the uneven groups 1a to 1h is set to be approximately 1/3 or less of the inner circumferential length of the tube.

この場合には、第６図のように、金属帯板２の表面に
前述のような組合せロールからなる加工ロール３と加圧
ロール４とによって凹凸群1a,1bを形成した後、ロール3
aの溝31とは異なる方向の溝71を形成したロール7aと、
ロール3bの溝32とは異なる方向の溝72を形成したロール
7bとを交、互に同軸73に取り付けた加工ロール７と、加
圧ロール８とにより、前記凹凸群1a,1bの上にオーバー
ラップして凹凸群1a,1bの凸条とは異なる方向の凸条を
形成し、金属帯板１の表面に断続した凹凸群1j,1kを交
互に形成すればよい。In this case, as shown in FIG. 6, after forming the concavo-convex groups 1a and 1b on the surface of the metal strip 2 with the processing roll 3 composed of the above-described combination roll and the pressure roll 4, the roll 3
a roll 7a formed with a groove 71 in a direction different from the groove 31 of a,
Roll formed with a groove 72 in a direction different from the groove 32 of the roll 3b
7b, the processing roll 7 attached to the coaxial 73 mutually, and the pressure roll 8 overlap the irregularities 1a, 1b and overlap with the irregularities 1a, 1b. Protrusions may be formed, and intermittent irregularities 1 j and 1 k may be formed alternately on the surface of the metal strip 1.

本発明に係る伝熱管及びその製造方法は、前記実施例
に限定されるものではなく、特許請求の範囲内におい
て、適宜他の要件を付加したり、あるいは適宜変更して
実施する場合が含まれる。The heat transfer tube and the method of manufacturing the same according to the present invention are not limited to the above-described embodiment, and include cases where other requirements are added or changed as appropriate within the scope of the claims. .

「発明の効果」 本発明に係る伝熱管の製造方法によれば、内部で冷媒
の流れがより乱れ易く、したがって伝熱性能がより向上
した伝熱管を提供することができる。[Effects of the Invention] According to the method for manufacturing a heat transfer tube according to the present invention, it is possible to provide a heat transfer tube in which the flow of the refrigerant is more easily disturbed inside, and thus the heat transfer performance is further improved.

【図面の簡単な説明】[Brief description of the drawings]

第１図は本発明の製造方法に係る伝熱管の一実施例を示
す部分拡大展開斜視図、第２図は他の実施例を示す伝熱
管の部分拡大展開斜視図、第３図はさらに他の実施例を
示す伝熱管の部分拡大展開斜視図、第４図はさらに他の
実施例を示す伝熱管の部分拡大展開斜視図、第５図は本
発明に係る製造方法の一例を説明するための一部省略斜
視図、第６図は本発明に係る製造方法の変形例を示す部
分斜視図、第７図及び第８図第１図〜第４図の実施例の
伝熱管と従来の伝熱管との伝熱性能試験の結果を示す線
図である。 １は伝熱管、1a〜1h,1j,1kは凹凸群、11〜18は凸条、11
a〜18aは溝、t1,t3,t4,t5,t7は溝底肉厚、h1〜h8は凸条
の高さ、p1〜p8は凸条のピッチ、θ１〜θ８は管軸方向
に対する凸条のリード角、２は金属帯板、３は軸、3a,3
b,7a,7bは加工ロール、31,32,71,72は溝、4,8は加圧ロ
ール、５は溶接手段、６は縮径手段である。FIG. 1 is a partially enlarged exploded perspective view showing one embodiment of a heat transfer tube according to the manufacturing method of the present invention, FIG. 2 is a partially enlarged exploded perspective view of a heat transfer tube showing another embodiment, and FIG. FIG. 4 is a partially enlarged exploded perspective view of a heat transfer tube showing still another embodiment, FIG. 4 is a partially enlarged exploded perspective view of a heat transfer tube showing still another embodiment, and FIG. 5 is a view for explaining an example of a manufacturing method according to the present invention. FIG. 6 is a partial perspective view showing a modification of the manufacturing method according to the present invention, and FIGS. 7 and 8 show the heat transfer tubes of the embodiment shown in FIGS. It is a diagram showing the result of the heat transfer performance test with a heat pipe. 1 is a heat transfer tube, 1a to 1h, 1j, 1k are uneven groups, 11 to 18 are ridges, 11
a to 18a are grooves, t1, t3, t4, t5, and t7 are groove bottom wall thicknesses, h1 to h8 are heights of ridges, p1 to p8 are pitches of ridges, θ1 to θ8 are ridges in the pipe axis direction. 2 is a metal strip, 3 is an axis, 3a, 3
b, 7a, 7b are working rolls, 31, 32, 71, 72 are grooves, 4, 8 are pressure rolls, 5 is welding means, and 6 is diameter reducing means.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ２８Ｆ 1/40 Ｆ２８Ｆ 1/40 Ｃ Ｅ (58)調査した分野(Int.Cl.7，ＤＢ名) F28F 1/40 B21B 1/22 B21B 1/08 B21B 27/02 B21C 37/15 ────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 7 identification code FIF28F 1/40 F28F 1/40 CE (58) Investigated field (Int.Cl. 7 , DB name) F28F 1/40 B21B 1 / 22 B21B 1/08 B21B 27/02 B21C 37/15

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】金属帯板を一定の方向へ繰り出しながら、
周面に多数の平行な凸条を形成した加工ロールと表面が
平滑な加圧ロールとに挟んで平行して交互に位置する多
数の凸条と溝からなる凹凸を前記金属帯板の一面へ加工
する工程と、前記金属帯板を前記凹凸の加工面が内側に
なるように順次幅方向に丸めて管状に成形する工程と、
前記金属帯板の突き合わせ部分を溶接する工程とを含
み、前記加工ロールは三個以上のロールを同軸へ取り外
し可能に両側から締付けた状態で取り付けた組み合わせ
ロールであり、加工ロールの隣合うロールは、それらの
周面に形成された凸条がピッチ，寸法，断面形状及び軸
方向に対するリード角の各要素のうちのいずれか一以上
の要素を異にしていることを特徴とする、伝熱管の製造
方法。1. While feeding out a metal strip in a certain direction,
Unevenness consisting of a number of ridges and grooves alternately positioned in parallel with a processing roll having a number of parallel ridges formed on the peripheral surface and a pressure roll having a smooth surface is applied to one surface of the metal strip. Processing, and forming the metal strip into a tubular shape by sequentially rolling in the width direction such that the processing surface of the irregularities is inside,
Welding the butted portions of the metal strips, wherein the processing roll is a combination roll in which three or more rolls are attached coaxially and removably fastened from both sides, and adjacent rolls of the processing rolls are: Characterized in that the ridges formed on their peripheral surfaces differ from one another in at least one of the following elements: pitch, size, cross-sectional shape and lead angle with respect to the axial direction. Production method.
JP2285665A 1990-10-23 1990-10-23 Heat transfer tube manufacturing method Expired - Fee Related JP3014432B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2285665A JP3014432B2 (en) 1990-10-23 1990-10-23 Heat transfer tube manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2285665A JP3014432B2 (en) 1990-10-23 1990-10-23 Heat transfer tube manufacturing method

Publications (2)

Publication Number Publication Date
JPH04158193A JPH04158193A (en) 1992-06-01
JP3014432B2 true JP3014432B2 (en) 2000-02-28

Family

ID=17694471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2285665A Expired - Fee Related JP3014432B2 (en) 1990-10-23 1990-10-23 Heat transfer tube manufacturing method

Country Status (1)

Country Link
JP (1) JP3014432B2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5791405A (en) * 1995-07-14 1998-08-11 Mitsubishi Shindoh Co., Ltd. Heat transfer tube having grooved inner surface
JP3751393B2 (en) * 1997-01-17 2006-03-01 株式会社コベルコ マテリアル銅管 Tube inner surface grooved heat transfer tube
MY120261A (en) 1998-11-24 2005-09-30 Furukawa Electric Co Ltd Internal-grooved heat exchanger tube and metal strip machining roll for internal-grooved heat exchanger tube
JP3271962B2 (en) * 2000-05-10 2002-04-08 冨士ダイス株式会社 Composite roll for manufacturing heat transfer tube and method for manufacturing composite roll for manufacturing heat transfer tube
DE10041919C1 (en) 2000-08-25 2001-10-31 Wieland Werke Ag Internally finned heat exchange tube has fins in individual zones arranged so that adjacent zones have fins offset at zone transition
DE10210016B9 (en) * 2002-03-07 2004-09-09 Wieland-Werke Ag Heat exchange tube with a ribbed inner surface
WO2005096786A2 (en) * 2004-04-09 2005-10-20 Ail Research, Inc. Heat and mass exchanger

Also Published As

Publication number Publication date
JPH04158193A (en) 1992-06-01

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