JPS6335340B2 - - Google Patents
Info
- Publication number
- JPS6335340B2 JPS6335340B2 JP13096682A JP13096682A JPS6335340B2 JP S6335340 B2 JPS6335340 B2 JP S6335340B2 JP 13096682 A JP13096682 A JP 13096682A JP 13096682 A JP13096682 A JP 13096682A JP S6335340 B2 JPS6335340 B2 JP S6335340B2
- Authority
- JP
- Japan
- Prior art keywords
- cut
- rolling
- heat exchanger
- roll
- cuts
- 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
Links
- 238000005096 rolling process Methods 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 101100008044 Caenorhabditis elegans cut-1 gene Proteins 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
- B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
本発明は管に巻き付けられたフインに適当な間
隔で穴が形成されているヘリカルフイン型の伝熱
管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a helical fin type heat transfer tube in which holes are formed at appropriate intervals in the fins wound around the tube.
穴あきヘリカルフインの付いた伝熱管は高性能
フイン付伝熱管として知られているが、従来、こ
の型の伝熱管はフインの素材たる帯材をパンチ抜
き加工により穴を形成し、それを圧延により管に
巻き付けて製造されていたため、打抜きの際の切
くずが機械に入り込み、故障などを起し、圧延機
においてばりが材料にひつかかるなどの支障があ
つた。その上、打抜かれた材料が無駄になる。さ
らに、帯材をカーリングして管に巻き付ける際に
圧延力が穴のない部分に集中し、その部分が切断
する、などの欠点があつた。 Heat exchanger tubes with perforated helical fins are known as high-performance finned heat exchanger tubes, but conventionally, this type of heat exchanger tube was made by punching holes in a strip of material for the fins, and then rolling them. Because the material was manufactured by wrapping it around a tube, chips from the punching process could get into the machine, causing breakdowns, and problems such as burrs catching on the material in the rolling mill. Moreover, the stamped material is wasted. Furthermore, when curling the strip material and winding it around the tube, the rolling force is concentrated on the portions without holes, which causes the portions to be cut.
本発明は上記従来技術の問題点を解決するもの
であつて、それ故本発明の目的は切りくずによる
不具合や材料の無駄をなくし且つカーリングの際
の帯材の切断を防止し得るようにし、ヘリカルフ
イン付伝熱管を好適に製造し得る伝熱管の製造方
法を提供することである。 The present invention solves the above-mentioned problems of the prior art, and therefore, the purpose of the present invention is to eliminate problems caused by chips and waste of material, and to prevent the strip from being cut during curling. It is an object of the present invention to provide a method for manufacturing a heat exchanger tube that can suitably manufacture a heat exchanger tube with helical fins.
本発明による伝熱管の製造方法の特徴はパンチ
抜き加工を用いず、それに代えてフイン素材たる
帯材に対し適当なピツチで、圧延線に対し傾斜し
た線状の切れ目を入れ、それを一対の圧延ロール
によつてテーパ圧延して管に巻き付ける際に、前
記圧延により前記切れ目を拡開するようにしたこ
とである。 A feature of the method for manufacturing heat exchanger tubes according to the present invention is that punching is not used, but instead, linear cuts are made at appropriate pitches in the strip material serving as the fin material at an angle to the rolled wire. When tapered by rolling rolls and wound around a tube, the cuts are widened by the rolling.
次に図面を参照のもとに本発明による伝熱管の
製造方法について説明する。第１図は本発明によ
る伝熱管の製造方法における全工程を概略的に示
したものであつて、最初の段階として、フインの
素材たる帯材１０の両側の縁以外の中間部分に対
しプレス１等により適当なピツチで線状の切れ目
１１を入れることが行なわれる。この切れ目は曲
線または折れ線であつてもよいが、第２図に示す
ように直線状のものであることが好ましい。な
お、切れ目の形成に伴なつて切れ目の縁が若干押
し曲げられるが、打抜くものではないため抜きく
ずは出ない。好ましくは、切れ目を付けられた帯
材１０を一対のロール２，３の間に通し、切れ目
の押し曲げられた部分を元の位置に戻して平らな
切れ目付帯材とする。この状態では切れ目１１は
第２図に示すように幅のない線状の切れ目になつ
ている。この切れ目の線形状がカーリングの加工
性を左右する。本発明の方法においては、切れ目
１１の線を以下に述べる圧延ロールの圧延線に一
致させず、或る角度で傾斜させている。従つて、
切れ目１１は帯材の両縁に対して90度とせず、90
度以外の角度になつている。このように切れ目１
１が形成されると、帯材１０は適当数のガイドロ
ーラ４，５，６によつて案内されながら、一対の
圧延ロール７，８に導入される。 Next, a method for manufacturing a heat exchanger tube according to the present invention will be explained with reference to the drawings. FIG. 1 schematically shows the entire process in the method for manufacturing a heat exchanger tube according to the present invention. As a first step, a press 1 Linear cuts 11 are made at appropriate pitches by etc. Although this cut may be a curved line or a broken line, it is preferably a straight line as shown in FIG. Note that as the cut is formed, the edges of the cut are slightly pressed and bent, but since the cut is not punched, no chips are produced. Preferably, the scored strip 10 is passed between a pair of rolls 2, 3, and the bent portion of the cut is returned to its original position to form a flat scored strip. In this state, the cut 11 is a linear cut with no width, as shown in FIG. The line shape of this cut determines the curling workability. In the method of the present invention, the line of the cut 11 does not coincide with the rolling line of the rolling rolls described below, but is inclined at a certain angle. Therefore,
The cut 11 is not at 90 degrees to both edges of the strip material, but at 90 degrees.
It is at an angle other than degrees. Cut 1 like this
1 is formed, the strip material 10 is introduced into a pair of rolling rolls 7, 8 while being guided by an appropriate number of guide rollers 4, 5, 6.
次いで、切れ目付帯材は第３図に示すように、
圧延ロール７，８によつてテーパ圧延され、連続
的にカーリングして管（図示せず）に巻き付き、
ヘリカルフイン付伝熱管となる。第３図中の１０
はそのようなヘリカルフインを示す。この段階に
おいて、本発明においては、テーパ圧延に用いら
れる圧延ロール７，８の一方または両方、図示の
例では圧延ロール７の圧延加工面のうち帯材１０
の切れ目１１に接する部分７ａのロール径をそれ
以外の部分７ｂのロール径より若干小径にした圧
延ロールが用いられる。従つて、圧延ロール７の
比較的小径の部分７ａではそれ以外の部分より圧
延力は小さくなり、ロール７の両端の部分７ｂが
その部分７ａより大径になつているので、両端の
部分７ｂに通常の圧延力が作用する。そのため帯
材１０の両側の縁部分に大きな圧延力が作用用す
るので、その部分に大きな伸びを生じ、その伸び
力で切れ目１１の在る中間の部分を引張るので切
れ目１１を拡開することになり、穴が形成され
る。第５図および第６図はそのように切れ目１１
が拡開されて穴になつたヘリカルフイン１０を示
すものであつて、切れ目１１が拡開された状態で
はこれまでのフインの穴と同じ役割を果し得るこ
とは云うまでもない。なお第４図では一方の小径
の圧延ロール７の圧延加工面に圧延力を弱める小
径部が形成されているが、そのような小径部は他
方の圧延ロール８に付けてもよく、または両方の
圧延ロールに付けてもよい。この圧延加工におい
て、帯材１０の幅をL0とし、切れ目の幅をL1、
ローラの圧延力をＦとすれば、切れ目がない部分
ではＦ／L0（Kg/mm）の圧延力を受けるのに対し
切れ目が圧延線と並行していれば切れ目のある部
分ではＦ／（L0―L1）（Kg/mm）の圧延力が切れ
目と材料両縁部の間の切れ目のない残部にかか
る。切れ目の拡開により穴あきフインと同じ効果
を得るには切れ目の長さを或る程度大きくし、通
常少なくとも切れ目の長さL1は帯材の幅L0の半
分は必要であり、その切れ目寸法L1が圧延線に
平行であれば、切れ目に集中する圧延力Ｆ／
（L0―L1）は平常の圧延力Ｆ／L0の２倍以上にな
り、切断が生じやすくなる。本発明では切れ目１
１を帯材の縁に対して傾斜し、即ち90度より小さ
く（その反対側では大きく）しているので、圧延
線上に存在する切れ目は短かくなる。フインの開
口穴寸法、および切れ目の角度は直接フイン側の
熱伝達率に影響するので、加工性と伝熱性の両面
より最適角が決められる。なお、切れ目１１また
は穴の形状は第７図イに示すように彎曲状でもよ
く、またはロのように傾斜が切れ目の全長にわた
るものでなくてもよく、切断の不具合が解消でき
る範囲の長さでよく、従つて折線状であつてもよ
い。 Next, as shown in Fig. 3, the cut banding material is
Taper rolled by rolling rolls 7 and 8, continuously curled and wound around a tube (not shown),
It becomes a heat transfer tube with helical fins. 10 in Figure 3
indicates such a helical fin. At this stage, in the present invention, one or both of the rolls 7 and 8 used for taper rolling, in the illustrated example, the strip material 10 on the rolling surface of the roll 7 is
A rolling roll is used in which the roll diameter of the portion 7a in contact with the cut 11 is made slightly smaller than the roll diameter of the other portion 7b. Therefore, the rolling force is smaller in the relatively small diameter portion 7a of the rolling roll 7 than in the other portions, and since the both end portions 7b of the roll 7 have a larger diameter than the portions 7a, Normal rolling forces act. Therefore, a large rolling force is applied to the edge portions on both sides of the strip material 10, causing a large elongation in that portion, and this elongation force pulls the middle portion where the cut 11 is located, so that the cut 11 is widened. and a hole is formed. Figures 5 and 6 show the cut 11 as shown in Figures 5 and 6.
It shows the helical fin 10 expanded to become a hole, and it goes without saying that when the cut 11 is expanded, it can play the same role as the hole of the conventional fin. In FIG. 4, a small diameter part is formed on the rolling surface of one of the small diameter rolls 7 to weaken the rolling force, but such a small diameter part may be attached to the other roll 8, or it may be attached to both rolls. It may also be applied to a rolling roll. In this rolling process, the width of the strip material 10 is L0 , the width of the cut is L1 ,
If the rolling force of the roller is F, then the part without cuts will receive a rolling force of F/L 0 (Kg/mm), whereas if the part with cuts is parallel to the rolling line, the rolling force will be F/( A rolling force of L 0 - L 1 ) (Kg/mm) is applied to the unbroken remainder between the cut and both edges of the material. In order to obtain the same effect as a perforated fin by widening the cut, the length of the cut must be increased to a certain extent, and normally the length of the cut L 1 is at least half the width L 0 of the strip material, and the length of the cut If the dimension L 1 is parallel to the rolling line, the rolling force concentrated at the cut F/
(L 0 −L 1 ) is more than twice the normal rolling force F/L 0 , and cutting is likely to occur. In the present invention, the cut 1
1 is inclined to the edge of the strip, ie less than 90 degrees (greater on the opposite side), the cuts present on the rolling line are shorter. Since the opening hole size of the fin and the angle of the cut directly affect the heat transfer coefficient on the fin side, the optimum angle is determined from both workability and heat transfer characteristics. Note that the shape of the cut 11 or the hole may be curved as shown in Figure 7 A, or the slope does not need to span the entire length of the cut as shown in B, and the length may be within a range that can eliminate cutting defects. Therefore, it may be in the form of a broken line.
上記のように、本発明による伝熱管の製造方法
では、帯材１０を打抜くものではないので切くず
が出ず、従つて材料の無駄がなく、切くずやばり
が問題を起すことがない。そして、もし帯材の切
れ目を圧延線と平行に形成すれば圧延力の極端な
集中により切断が生じる欠点があるが、本発明で
は切れ目を圧延線に対し或る角度をもたせて形成
するため、そのような欠点がない。そのため製造
が円滑になされ、且つ切れ目の形成からテーパ圧
延によるカーリングおよびフインニングを一連の
工程において連続的に行なうことができるので生
産性を高めることができる。 As described above, in the method for manufacturing a heat exchanger tube according to the present invention, since the strip material 10 is not punched, no chips are produced, so there is no wastage of material, and no problems are caused by chips or burrs. . If the cuts in the strip are formed parallel to the rolling line, there is a drawback that the cutting may occur due to extreme concentration of rolling force, but in the present invention, the cuts are formed at a certain angle to the rolling line. There are no such drawbacks. Therefore, the manufacturing process can be carried out smoothly, and productivity can be increased because the steps from forming the cut to curling and finning by tapered rolling can be performed continuously in a series of steps.
それ故、本発明によれば、切りくずやばりに伴
なう問題がなく、且つ材料を節約できると共に、
高性能の穴付ヘリカルフイン型の伝熱管を高い生
産性で製造することができる。 Therefore, according to the present invention, there are no problems associated with chips and burrs, and materials can be saved.
High performance helical fin type heat transfer tubes with holes can be manufactured with high productivity.
第１図は本発明による伝熱管の製造方法の全工
程を概略的に示した図、第２図のイは本発明の最
初の段階で切れ目を付けられた帯材の平面図およ
びロはその線Ａ―Ａ断面図、第３図はテーパ圧延
用ロールの断面図、第４図のイは圧延ロールの一
つの側面図およびロは平面図、第５図は本発明に
よつて製造された伝熱管の端面図、第６図は第５
図の線Ｂ―Ｂ断面図、そして第７図イ，ロは帯材
に付けられる切れ目の他の形態を示す平面図であ
る。
図中、１…プレス、７，８…圧延ロール、７ａ
…小径のロール部分、７ｂ…小径部以外のロール
部分、１０…帯状、１１…切れ目。
FIG. 1 is a diagram schematically showing the entire process of the method for manufacturing a heat exchanger tube according to the present invention, and FIG. 3 is a sectional view of a tapered rolling roll, A in FIG. 4 is a side view of one of the rolling rolls, B is a plan view, and FIG. The end view of the heat exchanger tube, Fig. 6 is the 5th
A sectional view taken along line BB in the figure, and FIGS. 7A and 7B are plan views showing other forms of cuts made in the strip material. In the figure, 1...press, 7, 8...rolling roll, 7a
...Small diameter roll portion, 7b...Roll portion other than the small diameter portion, 10...Strip shape, 11...Slit.
Claims (1)
縁以外の中間の部分に対し適当なピツチで線状の
切れ目を入れる段階を含み、前記切れ目は後記圧
延ロールの圧延線に対し傾斜しており、さらに圧
延ロールの一方または両方のものの圧延加工面の
うちの前記帯材の切れ目に接する部分のロール径
をそれ以外の部分のロール径より若干小径にした
前記一対の圧延ロールにより前記切れ目付帯材を
テーパ圧延し、それによつて前記切れ目を拡開す
ると共にカール加工して管に巻き付けてヘリカル
フイン付伝熱管とする段階を含む伝熱管の製造方
法。 ２ さらに前記切れ目の押し曲げられた部分をロ
ール加工により元の位置に戻して平らな切れ目付
帯材とする段階を含む特許請求の範囲第１項記載
の伝熱管の製造方法。[Claims] 1. The method includes the step of making linear cuts at an appropriate pitch in the middle part of the strip material, which is the fin material, other than the edges on both sides, using a press or the like, and the cuts are made along the rolling lines of the rolling rolls described later. The pair of rolling rolls is inclined with respect to the rolling surface of one or both of the rolling rolls, and the roll diameter of the portion of the rolling surface of one or both of the rolling rolls that is in contact with the cut of the strip material is slightly smaller than the roll diameter of the other portion. A method for manufacturing a heat exchanger tube, comprising the steps of: tapering the cut band material, thereby widening the cut, and curling the cut material to form a helical fin heat transfer tube. 2. The method of manufacturing a heat exchanger tube according to claim 1, further comprising the step of returning the pressed and bent portion of the cut to its original position by roll processing to form a flat cut band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13096682A JPS5921430A (en) | 1982-07-27 | 1982-07-27 | Manufacture of heat transmission pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13096682A JPS5921430A (en) | 1982-07-27 | 1982-07-27 | Manufacture of heat transmission pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5921430A JPS5921430A (en) | 1984-02-03 |
| JPS6335340B2 true JPS6335340B2 (en) | 1988-07-14 |
Family
ID=15046779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13096682A Granted JPS5921430A (en) | 1982-07-27 | 1982-07-27 | Manufacture of heat transmission pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921430A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03283925A (en) * | 1990-03-30 | 1991-12-13 | Tamura Electric Works Ltd | Radio telephone system |
| JPH0870262A (en) * | 1994-08-29 | 1996-03-12 | Nec Corp | Mobile communication equipment |
-
1982
- 1982-07-27 JP JP13096682A patent/JPS5921430A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03283925A (en) * | 1990-03-30 | 1991-12-13 | Tamura Electric Works Ltd | Radio telephone system |
| JPH0870262A (en) * | 1994-08-29 | 1996-03-12 | Nec Corp | Mobile communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5921430A (en) | 1984-02-03 |
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