JPH0431773B2 - - Google Patents
Info
- Publication number
- JPH0431773B2 JPH0431773B2 JP59182378A JP18237884A JPH0431773B2 JP H0431773 B2 JPH0431773 B2 JP H0431773B2 JP 59182378 A JP59182378 A JP 59182378A JP 18237884 A JP18237884 A JP 18237884A JP H0431773 B2 JPH0431773 B2 JP H0431773B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- hole
- convex part
- height
- tube
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 53
- 230000000630 rising effect Effects 0.000 claims description 26
- 230000037303 wrinkles Effects 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010409 ironing Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、熱交換器のフインプレートの成形
方法に関し、特にフインプレート素材の金属薄板
に、チユーブ挿着用の孔として、内周縁に立上が
つた壁（カラー）を有する立上り壁孔を形成する
方法に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for forming a fin plate of a heat exchanger, and in particular, a method for forming a fin plate of a heat exchanger, in particular, a method for forming a fin plate material such as a thin metal plate having an upright shape on the inner periphery as a hole for inserting a tube. The present invention relates to a method of forming a raised wall hole having a wall (collar).
従来の技術
一般にフインプレートタイプの熱交換器におい
ては、第４図に示すように、アルミニウム合金等
からなるフインプレート１の板面に、フレオン等
の冷却媒体もしくは熱媒体が流通する銅もしくは
アルミニウム合金製のチユーブ２を挿着するため
の立上り壁孔３を形成する必要がある。この立上
り壁孔３における立上り壁（カラー部）４は、チ
ユーブ２と充分に密着させてチユーブ２からフイ
ンプレート１への熱伝導を良好にする役割を果た
すと同時に、そのカラー部４の高さによつて平行
に隣接する他のフインプレート１Ａとの間隔を規
制する役割も果たす。そしてカラー部４の先端部
分は、他のフインプレート１Ａの喰い込みを防止
するために、断面湾曲状に拡がつたフレア部５と
なるように加工されるのが通常である。BACKGROUND TECHNOLOGY In general, in a fin plate type heat exchanger, as shown in FIG. 4, a fin plate 1 made of an aluminum alloy or the like is made of a copper or aluminum alloy in which a cooling medium or a heating medium such as Freon flows. It is necessary to form a rising wall hole 3 for inserting a tube 2 made of aluminum. The rising wall (collar part) 4 in the rising wall hole 3 plays a role of making the tube 2 in sufficient contact with the tube 2 to improve heat conduction from the tube 2 to the fin plate 1, and at the same time, the height of the collar part 4 is This also serves to regulate the distance between the other parallel fin plates 1A. The tip of the collar portion 4 is usually processed to form a flared portion 5 with a curved cross section to prevent other fin plates 1A from biting into the collar portion 4.
上述のようなフインプレート１の立上り壁孔３
を形成するための加工方法としては、従来から(イ)
ドロー方式、(ロ)バーリング方式、(ハ)アイアニング
方式などが知られている。 The rising wall hole 3 of the fin plate 1 as described above
Conventionally, the processing method for forming
Known methods include the draw method, (b) barring method, and (c) ironing method.
前記(イ)のドロー方式は、例えば第５図Ａ〜Ｆに
示すように、先ず張出し成形Ａを行ない、続いて
数段の再絞り加工Ｂ，Ｃを行なつた後、ピアス加
工Ｄによつて穿孔し、さらにバーリング加工Ｅに
よつてカラー部を形成し、最後にフレアリング加
工Ｆによりフレア部を形成するものである。また
前記(ロ)のバーリング方式は、例えば第６図Ａ〜Ｃ
に示すように、最初にピアス加工Ａによつて穿孔
し、続いてバーリング加工Ｂおよびフレアリング
加工Ｃを施すものである。さらに前記(ハ)のアイア
ニング方式は、例えば第７図Ａ〜Ｄに示すよう
に、前記バーリング方式と同様にピアス加工Ａお
よびバーリング加工Ｂを施し、しかる後にアイア
ニング加工Ｃによつてカラー部の先端を薄肉と
し、最後にフレアリング加工Ｄを施すものであ
る。 In the draw method (A) above, for example, as shown in FIGS. 5A to 5F, stretch forming A is first performed, followed by several stages of re-drawing B and C, and then piercing D is performed. A collar portion is formed by a burring process E, and finally a flared part is formed by a flaring process F. In addition, the burring method in (b) above can be used, for example, in Figures 6A to 6C.
As shown in the figure, a hole is first made by piercing process A, and then burring process B and flaring process C are performed. Furthermore, in the ironing method (c), as shown in FIGS. 7A to 7D, for example, piercing A and burring B are performed in the same way as in the burring method, and then ironing C is applied to the tip of the collar. is made thin, and finally a flaring process D is applied.
これらの加工方式は、いずれもピアス加工、バ
ーリング加工、フレアリング加工が共通し、これ
らの工程における孔開け−孔拡げ加工がカラー部
の高さ、ひいては隣接するフインプレートの間隔
を決める重要な要因となつている。 These processing methods all have piercing, burring, and flaring in common, and the hole-opening and hole-expanding processes in these processes are important factors that determine the height of the collar and, ultimately, the spacing between adjacent fin plates. It is becoming.
発明が解決すべき問題点
ところで上述のようにして立上り壁孔が形成さ
れたフインプレートを実際に熱交換器として組立
てるにあたつては、銅管あるいはアルミニウム合
金管からなるチユーブを立上り壁孔に挿通させた
後、そのチユーブの外周面を立上り壁孔のカラー
部に密着させるため、チユーブを内側から拡管さ
せるのが通常である。この拡管工程ではチユーブ
から立上り壁孔に相当な力が加わつて立上り壁孔
にその円周方向の引張応力が作用することになる
が、前述のような従来の方式で形成された立上り
壁孔では、チユーブを充分に密着させるべく大き
く拡管させた場合に引張応力により立上り壁孔が
拡大変形し、ついには破れて、逆にフインプレー
トとチユーブとの充分な密着が得られなくなるこ
とがある。すなわち家庭用ルームクーラー等にお
いてはフインプレートとして厚さが0.10〜0.12mm
程度と極めて薄くしかも充分な加工性を得るため
に軟質なアルミニウム板が使用されているため、
立上り壁孔の強度が低く、チユーブの拡管を大き
くした場合には円周方向の引張応力に耐えられず
に孔の内周縁が拡大変形し、ついにはその一部が
破断して、チユーブが立上り壁孔に充分に密着さ
れず、熱交換率が低下してしまうことがあつた。Problems to be Solved by the Invention By the way, when actually assembling the fin plate in which the upright wall holes are formed as described above as a heat exchanger, tubes made of copper tubes or aluminum alloy tubes are inserted into the upright wall holes. After insertion, the tube is usually expanded from the inside in order to bring the outer peripheral surface of the tube into close contact with the collar of the rising wall hole. In this pipe expansion process, a considerable force is applied from the tube to the rising wall hole, and tensile stress acts on the rising wall hole in the circumferential direction. When the tube is expanded to a large extent in order to achieve sufficient adhesion, the upright wall hole is enlarged and deformed due to tensile stress, and eventually breaks, which may make it impossible to obtain sufficient adhesion between the fin plate and the tube. In other words, in home room coolers, etc., the thickness of the fin plate is 0.10 to 0.12 mm.
A soft aluminum plate is used in order to be extremely thin and have sufficient workability.
If the strength of the rising wall hole is low and the tube is enlarged, the inner edge of the hole will expand and deform because it cannot withstand the tensile stress in the circumferential direction, and eventually a part of it will break and the tube will rise. In some cases, the heat exchange rate was lowered because the wall holes were not tightly adhered to the wall holes.
この発明は以上の事情に鑑みてなされたもの
で、熱交換媒体が流通するチユーブを挿着するた
めの立上り壁孔の強度を大きくして、その立上り
壁孔に挿通されるチユーブの拡管率を大きくした
場合でも立上り壁孔が拡大変形したり破断してし
まつたりすることを有効に防止して、常に充分に
チユーブと密着されるようにした立上り壁孔をフ
インプレート素材の金属薄板に形成する方法を提
供することを目的とするものである。 This invention was made in view of the above circumstances, and it increases the strength of the upright wall hole for inserting the tube through which the heat exchange medium flows, and increases the expansion rate of the tube inserted into the upright wall hole. A rising wall hole is formed in a thin metal plate made of fin plate material to effectively prevent the rising wall hole from expanding and deforming or breaking even when enlarged, and to ensure that it is always in sufficient contact with the tube. The purpose is to provide a method to do so.
問題点を解決するための手段
第１発明の方法は、熱交換媒体が流通するチユ
ーブを挿着するための孔として、孔部内周縁に板
面の一方側へ立上がつた壁を有する立上り壁孔を
フインプレート素材の金属薄板に形成するにあた
り、金属薄板に張り出し形成を施して金属薄板の
板面に所定の高さを有する凸部を形成し、しかる
後その凸部に対してその高さが前段階の高さの85
％以下となるように再絞り加工を行なつて、円筒
もしくは楕円筒状の凸部に加工するとともに凸部
基端の周囲の板面に半径方向の板シワを発生さ
せ、さらに凸部の頂面にピアス加工を施して孔部
を形成することを特徴とするものである。Means for Solving the Problems The method of the first invention provides a rising wall having a wall rising to one side of the plate surface on the inner peripheral edge of the hole as a hole for inserting a tube through which a heat exchange medium flows. When forming a hole in a thin metal plate made of fin plate material, the thin metal plate is formed with an overhang to form a convex portion having a predetermined height on the surface of the thin metal plate, and then the height is adjusted relative to the convex portion. is the height of the previous stage 85
% or less to form a cylindrical or elliptical convex part, create radial wrinkles on the plate surface around the base of the convex part, and further tighten the top of the convex part. The feature is that the surface is pierced to form a hole.
また第２発明の方法は、前記第１発明と同様に
フインプレート素材の金属薄板に張り出し成形を
施して金属薄板の板面に凸部を形成した後、その
凸部に１回もしくは２回以上の再絞り加工を施し
て所定の高さを有する切頭円錐台状もしくは切頭
楕円錘台状の凸部とし、しかる後にその凸部に対
してその高さが前段階の高さの85％以下となるよ
うに再絞り加工を行なつて、円筒もしくは楕円筒
状の凸部に加工するとともに凸部基端周囲の板面
に半径方向の板シワを発生させ、さらに凸部の頂
面にピアス加工を施して孔部を形成することを特
徴とするものである。 Further, in the method of the second invention, after forming a convex part on the surface of the thin metal plate by performing stretch molding on a thin metal plate made of a fin plate material as in the first invention, the convex part is applied once or twice or more. The re-drawing process is performed to create a truncated cone-shaped or truncated elliptical frustum-shaped convex part with a predetermined height, and then the height of the convex part is 85% of the previous height. Re-drawing is performed as shown below to form a cylindrical or elliptical convex part, create radial wrinkles on the plate surface around the base of the convex part, and then create a radial wrinkle on the plate surface around the base of the convex part. It is characterized in that a hole is formed by piercing.
発明の実施のための具体的説明
以下この発明の方法について第１図〜第３図を
参照して詳細に説明する。DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION The method of the present invention will be described in detail below with reference to FIGS. 1 to 3.
第１図Ａ〜Ｄ、第２図Ａ〜Ｄはこの発明の方法
を段階的に示すものであり、この発明の方法にお
いては先ず第１図Ａ、第２図Ａに示すように熱交
換器のフインプレートとなるべきアルミニウム合
金薄板などの金属薄板１０に、張り出し成形によ
つて凸部１１Ａを形成する。この張り出し成形は
例えば第３図Ａに示すような球頭のポンチ１２お
よびダイス１３を用いて、球頭の凸部１１Ａを形
成するのが通常であるが、最終的に楕円筒状の立
上り壁孔を形成する場合には楕円頭を有するポン
チを用いて楕円頭の凸部１１Ａを形成しても良
い。 1A to 2D and 2A to 2D show the method of this invention step by step. In the method of this invention, first, as shown in FIGS. 1A and 2A, a heat exchanger A convex portion 11A is formed by stretch molding on a metal thin plate 10 such as an aluminum alloy thin plate that is to become a fin plate. In this stretch molding, a spherical-headed punch 12 and a die 13 as shown in FIG. When forming a hole, a punch having an elliptical head may be used to form the convex portion 11A having an elliptical head.
次いで、第１図Ｂ、第２図Ｂに示すように１回
または２回以上の再絞り加工を行なつて、切頭円
錐台状もしくは切頭楕円錐台状の所定の高さH1
を有する凸部１１Ｂに加工する。この再絞り加工
は例えば第３図Ｂに示すような切頭円錐状もしく
は切頭楕円錐状のポンチ１４およびダイス１５を
用いて行なえば良い。またこの再絞り加工は、最
終的に得るべき立上り壁孔のカラー部高さに応じ
て（すなわち熱交換器用フインプレートの場合隣
り合うフインプレートの間隔に応じて）所定の高
さH1を得るべく、１回または２回以上の適宜の
回数行なう。 Next, as shown in FIG. 1B and FIG. 2B, re-drawing is performed once or twice to obtain a truncated conical shape or a truncated elliptical frustum shape with a predetermined height H 1
The convex portion 11B is processed to have a convex portion 11B. This re-drawing process may be performed using, for example, a punch 14 and die 15 having a truncated conical shape or a truncated elliptic conical shape as shown in FIG. 3B. In addition, this re-drawing process obtains a predetermined height H 1 depending on the height of the collar of the rising wall hole to be finally obtained (i.e., depending on the distance between adjacent fin plates in the case of fin plates for heat exchangers). Do this an appropriate number of times, one or more times.
その後、第１図Ｃ、第２図Ｃに示すように凸部
高さがH1の85％以下となるように成形高さを減
少させる再絞り加工を行ない、高さH2の円筒状
もしくは楕円筒状の凸部１１Ｃとする。すなわ
ち、例えば第３図Ｃに示すようなポンチ１６およ
びダイス１７を用いて、第１図Ｂ、第２図Ｂの段
階の成形高さH1に対し85％以下の高さH2の円筒
状もしくは楕円筒状の凸部１１Ｃを形成する。こ
のように成形高さを減少させる再絞り加工を施す
ことによつて、円筒状もしくは楕円筒状の凸部１
１Ｃの基端周囲の板面には、半径方向に沿つた多
数の板シワ１８が放射状に形成される。なおここ
で、再絞り加工の成形高さH2がその前段階の高
さH1の85％を越える場合には、半径方向の板シ
ワ１８が殆んど発生せず、したがつて成形高さ
H2はH1の85％以下とする必要がある。 After that, as shown in Figures 1C and 2C, re-drawing is performed to reduce the forming height so that the height of the convex part is 85% or less of H1 . The convex portion 11C has an elliptical cylindrical shape. That is, for example, using a punch 16 and die 17 as shown in FIG. 3C, a cylindrical shape having a height H 2 of 85% or less of the forming height H 1 at the stages of FIGS. 1B and 2B is formed. Alternatively, an elliptic cylindrical convex portion 11C is formed. By performing the re-drawing process to reduce the forming height in this way, the cylindrical or elliptical convex part 1
A large number of plate wrinkles 18 along the radial direction are radially formed on the plate surface around the base end of 1C. Here, if the forming height H 2 of the re-drawing process exceeds 85% of the height H 1 of the previous stage, almost no radial plate wrinkles 18 will occur, and therefore the forming height will be reduced. difference
H2 must be less than 85% of H1 .
ここで、前述のように高さが85％以下となるよ
うに再絞り加工を行なうことによつて半径方向に
沿つた板シワが発生する理由について第８図を参
照してさらに詳細に説明する。 Here, as mentioned above, the reason why the board wrinkles along the radial direction occur due to re-drawing so that the height is 85% or less will be explained in more detail with reference to Fig. 8. .
高さが低くなるように再絞り加工を行なえば、
再絞り加工が縮径加工であることと、凸部の高さ
が低くなることとが相俟つて、凸部の立上がり基
端周囲Ａに余肉が生じる。この余肉は、板厚増加
もしくはシワのいずれかになるが、この発明で対
象としている熱交換器用フインプレートの如き薄
板では、余肉は通常はシワの発生によつて吸収さ
れる。そして絞り加工の一つである再絞り加工で
は、軸方向Ｂには引張力が作用するが、周方向Ｃ
には圧縮力が作用する。このような周方向Ｃの圧
縮力によつて凸部の立上がり基端周囲Ａの余肉が
周方向に座屈し、半径方向（放射方向）に沿つた
シワが発生する。そしてこのような再絞り加工に
おいて、凸部の高さが前段階の85％以下とならな
ければ、前述のような余肉の発生量と周方向の圧
縮力が不充分となり、そのため周方向への座屈が
生じにくくなり、半径方向に沿つた板シワが充分
に得られない。 If you perform re-drawing to lower the height,
Due to the fact that the re-drawing process is a diameter reduction process and the height of the convex part is reduced, extra thickness is generated around the rising proximal end A of the convex part. This excess thickness results in either an increase in the plate thickness or wrinkles, but in a thin plate such as the fin plate for a heat exchanger that is the object of this invention, the excess thickness is usually absorbed by the generation of wrinkles. In redrawing, which is one type of drawing, tensile force acts in the axial direction B, but in the circumferential direction C.
Compressive force acts on . Due to such a compressive force in the circumferential direction C, the excess thickness around the rising proximal end A of the convex portion buckles in the circumferential direction, and wrinkles are generated along the radial direction (radial direction). In this re-drawing process, if the height of the convex part does not become 85% or less of the previous stage, the amount of extra thickness and compressive force in the circumferential direction as described above will be insufficient, and therefore buckling is less likely to occur, making it impossible to obtain sufficient plate wrinkles along the radial direction.
このようにして基端周囲の板面に半径方向の板
シワ１８を有する円筒状もしくは楕円筒状の凸部
１１Ｃを形成した後、その凸部１１Ｃの頂面１９
に対して公知のピアス加工を施し、第１図Ｄ、第
２図Ｄに示すように孔部２０を形成する。この工
程によつて、周囲の板面に半径方向の板シワ１８
を有しかつ内周縁にカラー部４を有する立上り壁
孔３が形成されたことになる。したがつてこの後
には、必要に応じてバーリング加工を施し、さら
に必要に応じフレアリング加工を施せば、熱交換
器用フインプレートに通常要求されるフレア部５
（第４図参照）を有する立上り壁孔が得られる。
もちろん用途によつてはピアス加工後のバーリン
グ加工やフレアリング加工は省くこともできる。 After forming a cylindrical or elliptical convex portion 11C having radial plate wrinkles 18 on the plate surface around the proximal end in this manner, the top surface 19 of the convex portion 11C
A well-known piercing process is applied to the hole 20 to form a hole 20 as shown in FIG. 1D and FIG. 2D. This process creates radial plate wrinkles 18 on the surrounding plate surface.
This means that a rising wall hole 3 having a collar portion 4 on the inner peripheral edge is formed. Therefore, after this, by performing burring processing as necessary and further performing flaring processing as necessary, the flared portion 5 normally required for heat exchanger fin plates can be obtained.
(See FIG. 4) A raised wall hole is obtained.
Of course, depending on the application, the burring or flaring process after piercing can be omitted.
なお以上の説明では第１図Ａ、第２図Ａに示す
張り出し成形の後、第１図Ｂ、第２図Ｂに示す再
絞り加工を行なつて所定の高さH1の凸部１１Ａ
とし、その後成形高さを減少させるための第１図
Ｃ、第２図Ｃに示す再絞り加工を行なうものとし
たが、最終的に得るべき立上り壁孔３のカラー部
４の高さが小さくても良い場合には、第１図Ｂ、
第２図Ｂに示す再絞り加工を省き、第１図Ａ、第
２図Ａの張り出し成形で高さH1の凸部を得てそ
の直後に第１図Ｃ、第２図Ｃに示す成形高さ減少
（H1→H2）のための再絞り加工を行ない、半径
方向の板シワ１８を発生させても良い。 In the above explanation, after the stretch forming shown in FIGS. 1A and 2A, the re-drawing process shown in FIGS. 1B and 2B is performed to form the convex portion 11A with a predetermined height H1.
After that, the re-drawing process shown in Fig. 1C and Fig. 2C was performed to reduce the forming height, but the height of the collar portion 4 of the rising wall hole 3 to be finally obtained was small. If it is acceptable, please refer to Figure 1B,
Omitting the re-drawing process shown in Figure 2B, a convex portion of height H 1 is obtained by the stretch forming process shown in Figures 1A and 2A, and immediately after that, the forming process shown in Figures 1C and 2C is performed. A re-drawing process may be performed to reduce the height (H 1 →H 2 ) to generate radial plate wrinkles 18.
作 用
上述のようにして形成された立上り壁孔３、す
なわち孔部の周囲の板面（平面部）に半径方向に
沿つた板シワ１８が生じている立上り壁孔３は、
その孔部周辺の強度が、半径方向の板シワ１８に
よつて構造的に上昇せしめられている。特にその
板シワ１８は、半径方向放射状に形成されている
ため、半径方向放射状に沿つた補強リブの機能を
果たし、内側から半径方向放射状に与えられる力
に対して高い剛性を与えることになる。そのため
例えば第４図に示したように立上り壁孔３内に銅
管もしくはアルミニウム合金管からなるチユーブ
２を挿通させてそのチユーブ２を充分に拡管させ
た場合でも、立上り壁孔３の周囲が拡大変形した
り破断したりするようなことが有効に防止され、
したがつてチユーブ２を立上り壁孔３のカラー部
４に充分に密着させることができる。Function The upright wall hole 3 formed as described above, that is, the upright wall hole 3 in which the plate wrinkles 18 along the radial direction are formed on the plate surface (flat part) around the hole,
The strength around the hole is structurally increased by the radial plate wrinkles 18. In particular, since the plate wrinkles 18 are formed radially in the radial direction, they function as reinforcing ribs along the radial direction, and provide high rigidity against forces applied radially from the inside. Therefore, even if the tube 2 made of a copper tube or an aluminum alloy tube is inserted into the upright wall hole 3 as shown in FIG. 4 and the tube 2 is sufficiently expanded, the circumference of the upright wall hole 3 will expand. Effectively prevents deformation or breakage,
Therefore, the tube 2 can be brought into close contact with the collar portion 4 of the upright wall hole 3.
またフインプレートの立上り壁孔３の周囲の半
径方向の板シワ１８は隣り合うフインプレート間
を流通する流体に乱流を発生させてその流体とフ
インプレートとの間の熱伝達を促進させる役割も
果たす。 The radial plate wrinkles 18 around the rising wall holes 3 of the fin plates also play a role in generating turbulence in the fluid flowing between adjacent fin plates and promoting heat transfer between the fluid and the fin plates. Fulfill.
発明の効果
以上の説明で明らかなようにこの発明の方法に
よれば、熱交換器のフインプレートにおける熱交
換媒体流通用のチユーブが挿着される立上り壁孔
として、孔部周囲の強度が高い立上り壁孔を形成
することができ、したがつてこの発明の方法によ
り形成された立上り壁孔にチユーブを挿通させて
そのチユーブを拡管させた場合に立上り壁孔の周
囲が拡大変形したり破断することが有効に防止さ
れるから、チユーブと立上り壁孔のカラー部とを
充分に密着させることができる。したがつてこの
発明の方法に成形したフインプレートを用いた熱
交換器においては、チユーブと立上り壁孔のカラ
ー部とを充分に密着させてその間の熱伝達を良好
とし、熱交換器を向上させることができる。また
立上り壁孔周囲の半径方向の板シワはフインプレ
ート間を通過する流体に乱流を発生させて流体と
フインプレート間の熱伝達を向上させる作用も果
たし、したがつて熱交換器を一層改善することが
できる。Effects of the Invention As is clear from the above explanation, according to the method of the present invention, the strength around the hole is high as the upright wall hole into which the tube for heat exchange medium circulation in the fin plate of the heat exchanger is inserted. A rising wall hole can be formed, and therefore, when a tube is inserted into the rising wall hole formed by the method of the present invention and the tube is expanded, the area around the rising wall hole is expanded and deformed or broken. Since this is effectively prevented, the tube and the collar portion of the upright wall hole can be brought into close contact with each other. Therefore, in a heat exchanger using a fin plate formed by the method of the present invention, the tube and the collar of the rising wall hole are brought into close contact with each other to improve heat transfer therebetween, thereby improving the heat exchanger. be able to. In addition, the radial plate wrinkles around the upright wall holes also work to generate turbulence in the fluid passing between the fin plates and improve heat transfer between the fluid and the fin plates, thus further improving the heat exchanger. can do.
第１図Ａ〜Ｄはこの発明の方法の各工程を段階
的に示すための金属薄板の斜視図、第２図Ａ〜Ｄ
は同じくこの発明の方法の各工程を段階的に示す
ための金属薄板の断面図、第３図Ａ〜Ｃはそれぞ
れ第１図Ａ〜Ｃの工程で使用されるポンチおよび
ダイスを示す縦断面図である。第４図は熱交換器
のフインプレートにおける従来の通常の立上り壁
孔を示す縦断面図、第５図Ａ〜Ｆは従来法として
のドロー方式を段階的に示す略解図、第６図Ａ〜
Ｃは従来法としてのバーリング加工方式を段階的
に示す略解図、第７図Ａ〜Ｄは従来法としてのア
イアニング方式を段階的に示す略解図、第８図は
この発明の方法における再絞り加工工程で半径方
向の板シワが発生する状況を説明するための説明
図である。
３……立上り壁孔、４……立上り壁（カラー
部）、１０……金属薄板、１１Ａ，１１Ｂ，１１
Ｃ……凸部、１８……板シワ。
1A to 1D are perspective views of a thin metal plate to show step by step each step of the method of the present invention, and 2A to 2D are perspective views of a metal sheet.
3A to 3C are longitudinal sectional views showing the punch and die used in the steps of FIGS. 1A to C, respectively. It is. Fig. 4 is a longitudinal sectional view showing a conventional normal upright wall hole in the fin plate of a heat exchanger, Figs.
C is a schematic diagram showing a step-by-step burring method as a conventional method, FIGS. 7A to D are a schematic diagram showing a step-by-step ironing method as a conventional method, and FIG. 8 is a re-drawing process in the method of this invention. FIG. 2 is an explanatory diagram for explaining a situation in which radial plate wrinkles occur during a process. 3... Standing wall hole, 4... Standing wall (collar part), 10... Metal thin plate, 11A, 11B, 11
C... Convex portion, 18... Board wrinkle.
Claims (1)
めの孔として、孔部内周縁に板面の一方側へ立上
がつた壁を有する立上り壁孔をフインプレート素
材の金属薄板に形成するにあたり、 金属薄板に張り出し成形を施して金属薄板の板
面に所定の高さを有する凸部を形成し、しかる後
その凸部に対してその高さが前段階の高さの85％
以下となるように再絞り加工を行なつて、円筒も
しくは楕円筒状の凸部に加工するとともに凸部基
端の周囲の板面に半径方向の板シワを発生させ、
さらに凸部の頂面にピアス加工を施して孔部を形
成することを特徴とする熱交換器用フインプレー
トの成形方法。 ２ 熱交換媒体が流通するチユーブを挿着するた
めの孔として、孔部内周縁に板面の一方側へ立上
がつた壁を有する立上り壁孔をフインプレート素
材の金属薄板に形成するにあたり、 金属薄板に張り出し成形を施して金属薄板の板
面に凸部を形成し、続いてその凸部に１回または
２回以上の再絞り加工を施して所定の高さを有す
る切頭円錐台もしくは切頭楕円錐台状の凸部と
し、しかる後その凸部に対してその高さが前段階
の高さの85％以下となるように再絞り加工を行な
つて、円筒もしくは楕円筒状の凸部に加工すると
ともに凸部基端の周囲の板面に半径方向の板シワ
を発生させ、さらに凸部の頂面にピアス加工を施
して孔部を形成することを特徴とする熱交換器用
フインプレートの成形方法。[Scope of Claims] 1. A rising wall hole having a wall rising to one side of the plate surface on the inner peripheral edge of the hole is used as a hole for inserting a tube through which a heat exchange medium flows. In order to form this, a thin metal sheet is stretch-molded to form a convex portion having a predetermined height on the surface of the thin metal sheet, and then the height of the convex portion is 85% of the height of the previous step. %
Re-drawing is performed as shown below to form a cylindrical or elliptical convex part, and to generate radial wrinkles on the plate surface around the base of the convex part,
A method for forming a fin plate for a heat exchanger, further comprising piercing the top surface of the convex portion to form a hole. 2. When forming a rising wall hole in a thin metal plate made of fin plate material with a wall rising to one side of the plate surface on the inner periphery of the hole as a hole for inserting a tube through which a heat exchange medium flows, metal A thin metal plate is stretch-formed to form a convex part on the surface of the thin metal plate, and then the convex part is redrawn once or twice or more to form a truncated cone or a truncated cone having a predetermined height. The convex part is shaped like an elliptic truncated cone, and then the convex part is re-drawn so that its height is less than 85% of the previous height to form a convex part in the shape of a cylinder or an elliptical cylinder. A fin for a heat exchanger, characterized in that a radial plate wrinkle is generated on the plate surface around the proximal end of the convex part, and a hole is formed by piercing the top surface of the convex part. How to form the plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59182378A JPS6160221A (en) | 1984-08-30 | 1984-08-30 | Formation of thin metallic plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59182378A JPS6160221A (en) | 1984-08-30 | 1984-08-30 | Formation of thin metallic plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6160221A JPS6160221A (en) | 1986-03-27 |
| JPH0431773B2 true JPH0431773B2 (en) | 1992-05-27 |
Family
ID=16117261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59182378A Granted JPS6160221A (en) | 1984-08-30 | 1984-08-30 | Formation of thin metallic plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6160221A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030066006A (en) * | 2002-02-04 | 2003-08-09 | 광정밀(주) | A method of producing drum for laundry machine |
| US7004242B2 (en) * | 2004-06-14 | 2006-02-28 | Advanced Heat Transfer, Llc | Enhanced heat exchanger apparatus and method |
| JP6418995B2 (en) * | 2015-03-18 | 2018-11-07 | 国立大学法人岩手大学 | Press forming method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027468A (en) * | 1973-07-11 | 1975-03-20 | ||
| JPS52116771A (en) * | 1976-03-26 | 1977-09-30 | Yamaha Motor Co Ltd | Method of manufacturing cylindrical member |
-
1984
- 1984-08-30 JP JP59182378A patent/JPS6160221A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027468A (en) * | 1973-07-11 | 1975-03-20 | ||
| JPS52116771A (en) * | 1976-03-26 | 1977-09-30 | Yamaha Motor Co Ltd | Method of manufacturing cylindrical member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6160221A (en) | 1986-03-27 |
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