JPS58215219A - Manufacture of heat transmitting tube provided with inner fin - Google Patents
Manufacture of heat transmitting tube provided with inner finInfo
- Publication number
- JPS58215219A JPS58215219A JP9984482A JP9984482A JPS58215219A JP S58215219 A JPS58215219 A JP S58215219A JP 9984482 A JP9984482 A JP 9984482A JP 9984482 A JP9984482 A JP 9984482A JP S58215219 A JPS58215219 A JP S58215219A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- fins
- heat transfer
- heat transmitting
- fin
- 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.)
- Pending
Links
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
- B21C37/225—Making finned or ribbed tubes by fixing strip or like material to tubes longitudinally-ribbed tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は管内に伝熱フィンを設けた伝熱管の製造方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a heat transfer tube in which heat transfer fins are provided inside the tube.
熱交換器等の伝熱管として、管内流体から管外流体への
熱貫流を向上させるため管内に伝熱フィンを設けて内部
表面積を増大せしめたインナーフィン付伝熱管が使用さ
れている。このインナーフィン付伝熱管は、従来２通り
の方法で製造されており、一つに引き抜き法に工り管と
伝熱フィンとを一体成形するものであるが、これは第１
図に示す如く、その断面に管１の伝熱フィン２の突起高
さが低いので内部表面積はそれ程増大せず従って熱貫流
も犬きくならない。これは引き抜き法という機械加工方
法の弱点である。もう一つの方法は第２図に示す如く、
予め放射状に成形した伝熱フィン２を管１の中へ挿入し
た後、内面に固定するものであるが、これは第１図に示
す引き抜き法によるものの断面構造と比較して伝熱フィ
ン２による内部表面積の増大が図られるという長所があ
る反面伝熱フィン２が父わっている中心部分３は伝熱に
寄与しないばかりか管内流体の流路断面積を減少させ圧
力損失全発生させてし１うという欠点がある。BACKGROUND ART Heat exchanger tubes with inner fins are used as heat exchanger tubes in heat exchangers and the like, in which heat transfer fins are provided inside the tube to increase the internal surface area in order to improve the heat flow from the fluid inside the tube to the fluid outside the tube. Conventionally, this heat transfer tube with inner fins has been manufactured using two methods.One is the drawing method in which the tube and heat transfer fins are integrally molded, but this is the first method.
As shown in the figure, since the height of the protrusion of the heat transfer fins 2 of the tube 1 is low in the cross section, the internal surface area does not increase so much and therefore the heat flow does not become too large. This is a weakness of the machining method known as the drawing method. Another method is as shown in Figure 2.
The heat transfer fins 2, which are formed in a radial shape in advance, are inserted into the tube 1 and then fixed to the inner surface. Although it has the advantage of increasing the internal surface area, the central portion 3 where the heat transfer fins 2 are located does not contribute to heat transfer, and also reduces the cross-sectional area of the flow path of the fluid in the pipe, causing a total pressure loss. There is a drawback.
本発明は上記の点に鑑み開発されたもので、鉄あるいは
ステンレス等の材質よりなり、前記管の内径より小径な
金属棒の局面に該金属棒の軸と平行な溝を切削し、かつ
該溝の表面に酸化被膜を形成してなるフィン固定具に前
記伝熱フィンを装着し、ついで管に挿入した後、拡散溶
接に工９前記伝熱フィンと前記管の内壁とを接合した上
、前記フィン固定具を引き抜くことを特徴とするもので
、その目的とするところは、突起高さが高く、かつ中心
部に交差部分を有しないインナーフィン付伝熱管の製造
方法全提供するにある。The present invention was developed in view of the above points, and includes cutting a groove parallel to the axis of the metal rod into the curved surface of the metal rod, which is made of a material such as iron or stainless steel and having a diameter smaller than the inner diameter of the tube. The heat transfer fins are attached to a fin fixing device formed by forming an oxide film on the surface of the groove, and then inserted into the tube. Step 9: After joining the heat transfer fins and the inner wall of the tube by diffusion welding, The present invention is characterized in that the fin fixing device is pulled out, and its purpose is to provide a complete method for manufacturing a heat exchanger tube with inner fins that has a high protrusion height and does not have an intersection in the center.
以下第３図乃至第５図により本発明方法の一実施例を説
明する。An embodiment of the method of the present invention will be described below with reference to FIGS. 3 to 5.
伝熱フィン４が装着される管１の内径より小径の鉄ある
いはステンレス等の金属棒からなるフィン固定具５はそ
の外周に軸線方向の溝６１ｃ適数本切削し、この溝６Ｖ
ｃ酸化被膜７を形成する。The fin fixture 5, which is made of a metal rod made of iron or stainless steel with a smaller diameter than the inner diameter of the tube 1 to which the heat transfer fins 4 are attached, has an appropriate number of axial grooves 61c cut on its outer periphery.
c. Form an oxide film 7.
そして、第３図に示す如く、この溝６＃／ｃ伝熱フィン
４を装着する。この場合相対向する伝熱フィン４の外端
面間の距離Ｈは管の内径エフわずかに小さくする。Then, as shown in FIG. 3, this groove 6#/c heat transfer fin 4 is attached. In this case, the distance H between the outer end surfaces of the opposing heat transfer fins 4 is made slightly smaller than the inner diameter of the tube.
なお、溝６の断面形状は、第４図（イ）に示す如く同一
幅で切削されたもの、また第４図（ロ）に示す如く、内
部に向けて幅広くなる工うに台形状に切断されたもの等
任意の形状全選択できる。そしてこれに装着される伝熱
フィン４の断面形状も夫々溝６の断面形状と同じものを
用いる０
伝熱フイン４は所望の長さに切断されており、後述の加
熱処理に伴って伝熱フィン４が熱膨張した時に隣接する
伝熱フィン４同士が接触しないように第３図に示す如く
所定の間隙Ｃ′ｔ−保持して溝６に装着する。Note that the cross-sectional shape of the groove 6 is one cut with the same width as shown in FIG. You can select all shapes of your choice. The cross-sectional shape of the heat transfer fins 4 attached thereto is also the same as the cross-sectional shape of the respective grooves 6. The heat transfer fins 4 are cut to a desired length, and the heat transfer process When the fins 4 thermally expand, adjacent heat transfer fins 4 are mounted in the groove 6 while maintaining a predetermined gap C't- as shown in FIG. 3 so that the adjacent heat transfer fins 4 do not come into contact with each other.
なお、伝熱フィン４の溝６への装着は、例えば第４図（
イ）に示す如き溝６の場合は単に溝６の上方から差し込
み、第４図（ロ）に示す如き溝６の場合は、フィン固定
具５の端面から順に差し込む等その形状に合せて行なう
。The heat transfer fins 4 are attached to the grooves 6 as shown in FIG. 4 (
In the case of the groove 6 shown in (a), simply insert from above the groove 6, and in the case of the groove 6 shown in FIG.
また、酸化被膜７は少なくとも伝熱フィン４と接触する
部分ＶＣは設ける必要がある０さらに溝６０本数は装着
すべき伝熱フィン４の数に応じて決定する。Further, it is necessary to provide at least a portion VC of the oxide film 7 that contacts the heat transfer fins 4. Furthermore, the number of grooves 60 is determined depending on the number of heat transfer fins 4 to be attached.
なお、管１及び伝熱フィン４の材質とじては、銅、銅合
金、アルミニウムあるいはアルミニウム合金等が使用で
きる。In addition, as for the material of the tube 1 and the heat transfer fins 4, copper, copper alloy, aluminum, aluminum alloy, etc. can be used.
次にこのように伝熱フィン４をフィン固定具５に装着し
たまま、例えば液化窒素等の低温液化ガス中に浸漬して
冷却処理し、前記距離Ｈが若干縮小したところで管１内
に挿入する０なお、この冷却処理に前記挿入を容易にす
るために行なうものであるが、伝熱フィン４をフィン固
定具５Ｖｃ装着する際の状況により必要に応じて行なえ
ば良い。Next, while the heat transfer fins 4 are attached to the fin fixing device 5 in this manner, they are immersed in a low-temperature liquefied gas such as liquefied nitrogen for cooling treatment, and when the distance H is slightly reduced, they are inserted into the tube 1. Note that this cooling process is performed to facilitate the insertion, but may be performed as necessary depending on the situation when attaching the heat transfer fins 4 to the fin fixture 5Vc.
そして、伝熱フィン４が挿入された管１を加熱炉に無荷
重のまま収納し、必要に応じて伝熱フイン４が即ち、前
記伝熱フィン４が挿入された管１の一端を閉塞し他端を
排気装置に連接して該管１内の真空排気して真空にする
か、あるいは前記他端全不活性ガス若しくは還元性ガス
を充填した容器に連接し該管１内の空気を置換した後に
加熱処理を行なっても工く、この場合でも前記同様に拡
散溶接が行なわれる。Then, the tube 1 into which the heat transfer fins 4 have been inserted is stored in a heating furnace without any load, and if necessary, the heat transfer fins 4 can close one end of the tube 1 into which the heat transfer fins 4 have been inserted. Either the other end is connected to an exhaust device to evacuate the inside of the tube 1 to create a vacuum, or the other end is connected to a container completely filled with an inert gas or a reducing gas to replace the air inside the tube 1. It is also possible to perform a heat treatment after this process, and in this case as well, diffusion welding is performed in the same manner as described above.
本発明の方法は上述の如くであるが、以下に実験例につ
いて説明する。Although the method of the present invention is as described above, experimental examples will be explained below.
（実験例）
リン脱酸銅継目無管（ＪＩＳ−Ｃ１２２０Ｔ ）材エフ
なる外径１９．０＋ｍ、肉厚０．８ｍｂ長さ５００薦の
管にアルミニウムの合金（Ｊ ｌ８−Ａ６０６３ ）材
よりなる板厚１．４＋ｏ＋ｓ幅６．Ｏｒｒａｇ、長さ５
０澗の伝熱フィン全前記管の内面の８個所に本発明の方
法九工り加熱処理条件を常温付近になる迄適当時間放置
した後、前記加熱炉内を真空にあるいは不活性ガス若し
くは還元性ガスで置換したあと２５０Ｃ〜５４０ｒ、望
ましくは３５０Ｃ〜５００Ｃの温度下で１時間〜１５時
間加熱処理を行なう。この加熱処理ＶＣよって伝熱フィ
ン４と管ｌとは拡散接合し伝熱フィン４と管１の内面と
は冶金的に結合する。−万伝熱フイン４とフィン固定具
５の溝６とに、溝６の表面に形成された酸化被膜７に工
り拡散接合することはない。(Experiment example) Pipe made of phosphorus deoxidized copper seamless pipe (JIS-C1220T) material, outer diameter 19.0 + m, wall thickness 0.8 mb, length 500 mm, and plate made of aluminum alloy (JI8-A6063) material. Thickness 1.4+o+s width 6. Orrag, length 5
After applying the heat treatment conditions of the present invention to 8 locations on the inner surface of all the heat transfer fins of 0.0 cm, the method of the present invention is left for an appropriate period of time until the temperature reaches around room temperature, and then the inside of the heating furnace is evacuated or heated with an inert gas or reducing gas. After replacing with a neutral gas, heat treatment is performed at a temperature of 250C to 540r, preferably 350C to 500C, for 1 hour to 15 hours. By this heat treatment VC, the heat transfer fins 4 and the tube 1 are diffusion bonded, and the heat transfer fins 4 and the inner surface of the tube 1 are metallurgically bonded. - The oxide film 7 formed on the surface of the groove 6 is not bonded to the heat transfer fin 4 and the groove 6 of the fin fixture 5 by diffusion bonding.
したがって上記加熱処理終了後、必要に応じ温度が低下
したところでフィン固定具５を引き抜くと第５図に示す
如き中心部に交差部のないインナーフィン付伝熱管が得
られる。Therefore, after the above heat treatment is completed, if the fin fixture 5 is pulled out when the temperature is lowered as required, a heat exchanger tube with inner fins having no intersection in the center as shown in FIG. 5 can be obtained.
なお、上述の説明においては、加熱処理を行なうための
加熱処理条件を加熱炉内で整えたが、他の方法として伝
熱フィン４を挿入した管ｌ内で整えることも可能である
。In the above description, the heat treatment conditions for performing the heat treatment are set in the heating furnace, but it is also possible to set them in the tube l into which the heat transfer fins 4 are inserted as another method.
真空中（１０−’ Ｔｏｒｒ以下）、４００Ｃ’ｔｌ’
７時間加熱処理全行なってインナーフィン付伝熱管を製
造した。これを同一材質、同一の長さの丸棒全使用して
、伝熱フィンを前記同様ｖＣ１，４ｍ＋の厚さに引き抜
き方法で製造したインナーフィン付伝熱管とを単位長さ
で比較すると本発明の方法で製作したインナーフィン付
伝熱管の方が熱貫流値が１゜８倍もあった。また、あら
かじめ伝熱フィンを放射状に成形して管の内面に固定す
る従来方法に比較すると、単位長さでの内部表面積は本
発明の方法によるインナーフィン付伝熱管の方が少ない
ものの、従来方法でのインナーフィンの交差部分は伝熱
に役立たない部分なので結局熱貫流は同値である。しか
るに圧力損失で比較すると、本発明によるインナーフィ
ン付伝熱管の方が約３０％損失かが少ない。In vacuum (10-' Torr or less), 400 C'tl'
A heat exchanger tube with inner fins was manufactured by performing the entire heat treatment for 7 hours. Comparing this in terms of unit length with a heat transfer tube with inner fins manufactured using the same method of drawing the heat transfer fins to a thickness of vC1.4m+ using all the round rods made of the same material and the same length, the present invention The heat transfer tube with inner fins manufactured using the above method had a heat transfer value 1°8 times higher. In addition, compared to the conventional method in which heat transfer fins are formed radially in advance and fixed on the inner surface of the tube, the internal surface area per unit length of the heat transfer tube with inner fins made by the method of the present invention is smaller, but the conventional method Since the intersection of the inner fins at , is not useful for heat transfer, the heat transmission is ultimately the same. However, when comparing the pressure loss, the heat exchanger tube with inner fins according to the present invention has a lower loss by about 30%.
上述の如く、本発明は引き抜き法や予め伝熱フィンを放
射状に成形して管内に挿入する従来方法とけ別異な方法
によってインナーフィン付伝熱管を製造するものであり
、即ち予め機械加工した伝熱フィンをフィン固定具に装
着後、必要に応じて冷却した後管内に挿入し拡散溶接し
、その後、前記フィン固定具を引き抜く方法によって内
部伝熱面積が犬で、かつ流体損失の°少ないインナーフ
ィン付伝熱管を製造し得るようにしたものである。As mentioned above, the present invention manufactures a heat transfer tube with inner fins by a method different from the drawing method or the conventional method of forming heat transfer fins radially in advance and inserting them into the tube. After attaching the fin to the fin fixture, cool it if necessary, insert it into the tube, do diffusion welding, and then pull out the fin fixture to create an inner fin with a small internal heat transfer area and low fluid loss. This makes it possible to manufacture heat exchanger tubes.
爽に前記拡散溶接終了後にフィン固定具を引き抜く際は
、フィン固定具の伝熱フィン装着用の溝に酸化被膜が形
成されているので、フィン固定具と伝熱フィンとが拡散
溶接せず容易に引き抜くことができ作業性も良い。１だ
、前記必要に応じて冷却した後管に挿入し、管内で常温
に戻すことにより、伝熱フィンと管内面との接触状態を
良好にして拡散溶接できる効果もある。When pulling out the fin fixture after diffusion welding, an oxide film is formed in the heat transfer fin installation groove of the fin fixture, so the fin fixture and heat transfer fin can be easily removed without diffusion welding. It can be pulled out and has good workability. 1. By inserting the heat transfer fin into the tube after cooling it as necessary and returning it to room temperature inside the tube, there is also the effect that the contact state between the heat transfer fin and the inner surface of the tube can be improved and diffusion welding can be performed.
第１図、第２図は夫々従来の製造方法にエリ製造された
インナーフィン付伝熱管の断面図、第３図乃至第５図は
本発明の詳細な説明図で、第３図はフィン固定具に伝熱
フィンを装着した斜視図、第４図はフィン固定具の断面
図で、（イ）は同一幅の溝、（ロ）はフィン固定具の内
部に向けて幅が広くなるように切削された溝次を示し、
第５図は本発明の方法に↓り製造したインナーフィン付
伝熱管の断面図である。
ｌに管、４に伝熱フィン、５はフィン固定具、６は溝、
７は酸化被膜である。
特 許 出 願 人 日本酸素株式会社手続補正書
１１召 （ＩＩ ５ ７ ＋１ ７ 月 １
３ ［１長
′１１許庁Ｘ育宜若杉和夫殿
１ 事イ′１の表・ｊζ
昭和５フイ１＠ 許願第９９８４４ 号２、発 明
の名称
インナーフィン付伝熱管の製造方法
：１ 補正をする者
・１川とσ）関係 特許出願人
イ１１す１
’Ａ、 ｈｌｉ ＋ｌ’の内容 −゛別
紙の通り
明細書第６頁第１５行から第９頁第４行の「必要に応じ
て伝熱フィン４・・・・・・真空中（１０−’ ＴＯｒ
ｒ以下）、」を下記の通り訂正する。
［必要に応じて伝熱フィン４が常温付近になる迄適当時
間放置した後、前記加熱炉内をＸ空にあるいは不活性ガ
ス若しくは還元性ガスで置換したあと２５０Ｃ〜５４０
ｒ、望ましくは３５０Ｃ〜５００Ｃの温度下で１時間〜
１５時間加熱処理を行なう。この加熱処理によって伝熱
フィン４と管ｌとは拡散接合し伝熱フィン４と管ｌの内
面とは冶金的に結合する。−万伝熱フイン４とフィン固
定具５ゐ溝６とは、溝６の表面に形成された酸化被膜７
に↓り拡散接合することはない。
したがって上記加熱処理終了後、必要に応じ温度が低下
したところでフィン固定具５を引き抜くと第５図に示す
如き中心部に交差部のないインナーフィン付伝熱管が得
られる。
なお、上述の説明においては、加熱処理を行なうための
加熱処理条件を加熱炉内で整えたが、他の方法として伝
熱フィン４を挿入した管１内で整えることも可能である
。
即ち、前記伝熱フィン４が挿入された管１の一端を閉塞
し他端を排気装置に連接して該管ｌ内をに空排気して真
空にするか、あるいは前記他端を不活性カス若しくは還
元性ガスを充填した容器に連接し該管１内の空気を置換
した後に加熱処理を行なっても工く、この場合でも前記
同様に拡散溶接が行なわれる。
本発明の方法は上述の如くであるが、以下に実験例につ
いて説明する。
（実験例）
リン脱酸鋼継目無言（Ｊ ｌ５−Ｃ１２２０Ｔ ）相よ
りなる外径１９．０論、肉厚０．８覇、長さ５００順の
管にアルミニウムの合金（ＪＩＳ−Ａ６０６３ ）材工
りなる板厚１．４順、幅６．０ｍｂ長さ５０冒の伝熱フ
ィンを前記管の内面の８個所に不発明の方法にエリ加熱
処理条件を真空中（１０”−’Ｔｏｒｒ以下）、」
以上Figures 1 and 2 are cross-sectional views of heat exchanger tubes with inner fins manufactured using conventional manufacturing methods, Figures 3 to 5 are detailed illustrations of the present invention, and Figure 3 shows the fins fixed. Figure 4 is a perspective view of heat transfer fins attached to the tool, and Figure 4 is a cross-sectional view of the fin fixture, where (a) shows grooves of the same width, and (b) shows grooves that become wider toward the inside of the fin fixture. Shows the cut groove following,
FIG. 5 is a sectional view of a heat exchanger tube with inner fins manufactured according to the method of the present invention. 1 is a tube, 4 is a heat transfer fin, 5 is a fin fixture, 6 is a groove,
7 is an oxide film. Patent Applicant Nippon Sanso Co., Ltd. Procedural Amendment 11th Call (II 5 7 +1 July 1
3 [1 Section'11 Authorized Agency Relationship between patent applicant I11 1 'A, hli +l' - ``As required, from line 15 on page 6 to line 4 on page 9 of the specification, as shown in the attached sheet. Heat transfer fin 4...In vacuum (10-' Tor
(r and below),” is corrected as follows. [If necessary, after leaving the heat transfer fins 4 at room temperature for an appropriate period of time, the inside of the heating furnace is emptied or replaced with inert gas or reducing gas, and then heated to 250C to 540C.
r, preferably for 1 hour at a temperature of 350C to 500C
Heat treatment is performed for 15 hours. Through this heat treatment, the heat transfer fins 4 and the tube 1 are diffusion bonded, and the heat transfer fins 4 and the inner surface of the tube 1 are metallurgically bonded. - The heat transfer fins 4 and the fin fixture 5, the grooves 6, and the oxide film 7 formed on the surface of the grooves 6.
↓There is no diffusion bonding. Therefore, after the above heat treatment is completed, if the fin fixture 5 is pulled out when the temperature is lowered as required, a heat exchanger tube with inner fins having no intersection in the center as shown in FIG. 5 can be obtained. In the above description, the heat treatment conditions for performing the heat treatment are set in the heating furnace, but it is also possible to set them in the tube 1 into which the heat transfer fins 4 are inserted as another method. That is, one end of the tube 1 into which the heat transfer fins 4 are inserted is closed, and the other end is connected to an exhaust device to evacuate the inside of the tube 1 to create a vacuum, or the other end is covered with an inert gas. Alternatively, the pipe 1 may be connected to a container filled with a reducing gas and heat treated after replacing the air in the pipe 1. In this case, diffusion welding is performed in the same manner as described above. Although the method of the present invention is as described above, experimental examples will be explained below. (Experiment example) A pipe made of phosphorus deoxidized steel jointless (JI5-C1220T) phase with an outer diameter of 19.0 mm, wall thickness of 0.8 mm, and a length of 500 mm, and an aluminum alloy (JIS-A6063) material. Heat transfer fins with a thickness of 1.4 mm, a width of 6.0 mb, and a length of 50 mm were placed at 8 locations on the inner surface of the tube using an uninvented method under heat treatment conditions in vacuum (10''-'Torr or less). ,"that's all
Claims (1)
ィン付伝熱管を製造する方法において、鉄あるいはステ
ンレス等の材質よりなり、前記管の内径より小径な金属
棒の局面に該金属棒の軸と平行な溝を切削し、かつ該溝
の表面に酸化被膜を形成してなるフィン固定具に前記伝
熱フィンを装着し、ついで管に挿入した後、拡散溶接に
工り前記伝熱フィンと前記管の内壁とを接合した上、前
記フィン固定具を引き抜くことを特徴とするインナーフ
ィン付伝熱管の製造方法。1. In a method for manufacturing a heat exchanger tube with inner fins in which heat transfer fins are attached to the inner surface of the tube, a metal rod is made of a material such as iron or stainless steel and has a smaller diameter than the inner diameter of the tube. The heat transfer fins are attached to a fin fixture made by cutting a groove parallel to the axis and forming an oxide film on the surface of the groove, and then inserted into the pipe, and then diffusion welded to attach the heat transfer fins. A method of manufacturing a heat exchanger tube with inner fins, the method comprising: joining the inner wall of the inner fin to the inner wall of the tube, and then pulling out the fin fixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9984482A JPS58215219A (en) | 1982-06-10 | 1982-06-10 | Manufacture of heat transmitting tube provided with inner fin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9984482A JPS58215219A (en) | 1982-06-10 | 1982-06-10 | Manufacture of heat transmitting tube provided with inner fin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58215219A true JPS58215219A (en) | 1983-12-14 |
Family
ID=14258107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9984482A Pending JPS58215219A (en) | 1982-06-10 | 1982-06-10 | Manufacture of heat transmitting tube provided with inner fin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58215219A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01205813A (en) * | 1988-02-15 | 1989-08-18 | Kawasaki Heavy Ind Ltd | Manufacture of partition pipe |
-
1982
- 1982-06-10 JP JP9984482A patent/JPS58215219A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01205813A (en) * | 1988-02-15 | 1989-08-18 | Kawasaki Heavy Ind Ltd | Manufacture of partition pipe |
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