JPH1133635A - Method for forming ring groove for resistance welding by coining - Google Patents
Method for forming ring groove for resistance welding by coiningInfo
- Publication number
- JPH1133635A JPH1133635A JP9212544A JP21254497A JPH1133635A JP H1133635 A JPH1133635 A JP H1133635A JP 9212544 A JP9212544 A JP 9212544A JP 21254497 A JP21254497 A JP 21254497A JP H1133635 A JPH1133635 A JP H1133635A
- Authority
- JP
- Japan
- Prior art keywords
- ring groove
- punch
- coining
- ring
- resistance welding
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 14
- 238000010409 ironing Methods 0.000 claims abstract description 8
- 229910001369 Brass Inorganic materials 0.000 claims description 15
- 239000010951 brass Substances 0.000 claims description 15
- 238000007493 shaping process Methods 0.000 claims description 14
- 239000002826 coolant Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 abstract description 3
- 229910000906 Bronze Inorganic materials 0.000 abstract 1
- 239000010974 bronze Substances 0.000 abstract 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005304 joining Methods 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、異種金属、例えば
冷凍サイクルに用いられる電磁弁や電動弁等の黄銅製の
ボディと銅パイプとの抵抗溶接が容易に行えるようにす
るために、一方のボディに形成される抵抗溶接用リング
溝の形成方法に係り、特に冷媒の流通孔の周りに形成す
るリング溝であっても、コイニング加工によってもリン
グ溝が変形することのないコイニングによる抵抗溶接用
リング溝の形成方法に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a method for easily performing resistance welding between a copper pipe and a body made of a dissimilar metal, for example, a brass body such as a solenoid valve or an electric valve used in a refrigeration cycle. The present invention relates to a method of forming a ring groove for resistance welding formed on a body, particularly for a ring groove formed around a coolant circulation hole, for resistance welding by coining such that the ring groove is not deformed by coining. The present invention relates to a method for forming a ring groove.
【０００２】[0002]
【従来の技術】従来より、異種金属の抵抗溶接は融点の
相違から極めて困難なものとされ、一般的にはろー付け
による接合が行われていた。ところが、最近では冷凍サ
イクルに用いられる電磁弁や電動弁等の黄銅製のボディ
のパイプ接続部分にリング溝を形成することにより、銅
パイプであっても抵抗溶接によって接合強度が強くかつ
気密性の高い固相溶着ができるようになっている。2. Description of the Related Art Conventionally, resistance welding of dissimilar metals has been regarded as extremely difficult due to differences in melting points, and joining by brazing has generally been performed. However, recently, by forming a ring groove in the pipe connection part of a brass body such as an electromagnetic valve or an electric valve used in a refrigeration cycle, even copper pipes have strong joint strength and resistance to airtightness by resistance welding. High solid-phase welding can be performed.
【０００３】図３は、パイプ接合のための溝加工が施さ
れた従来の黄銅製のボディ１に銅パイプ５が抵抗溶接さ
れた縦断面図である。黄銅製のボディ１の中心部には、
冷媒の流通孔２が設けられている。細幅のリング溝４
は、前記流通孔２の周りに切削加工によって設けられて
おり、後述する銅パイプ５を圧入の状態で固相溶着でき
るようになっている。FIG. 3 is a longitudinal sectional view in which a copper pipe 5 is resistance-welded to a conventional brass body 1 provided with a groove for pipe joining. In the center of the body 1 made of brass,
A coolant circulation hole 2 is provided. Narrow ring groove 4
Is provided around the flow hole 2 by cutting, so that a copper pipe 5 described later can be solid-phase welded in a press-fit state.
【０００４】銅パイプ５は、前記ボディ１のリング溝４
に臨みやすくするために、溶接側端部の外面に面取りが
設けられている。符号５ａで示す突起は、抵抗溶接時に
銅パイプがリング溝４にてしごかれて出来る瘤である。[0004] The copper pipe 5 is connected to the ring groove 4 of the body 1.
A chamfer is provided on the outer surface of the welded end to make it easier to access. The protrusion indicated by reference numeral 5a is a bump formed by squeezing the copper pipe in the ring groove 4 during resistance welding.
【０００５】[0005]
【発明が解決しようとする課題】ところで、前述の銅パ
イプ５は、通常０．７ｍｍの肉厚のものが用いられてお
り、一方、これに対応する黄銅製ボディ１に設けられる
リング溝４は、幅０．４、深さ１．０ｍｍと非常に細く
する必要があった。しかしながら、前述のリング溝４は
切削加工によって行われているため、切削バイトは非常
に細く（刃幅０．４ｍｍに対して刃先の長さは約２．５
倍と長くなる）なるため、バイトが製作しにくく、また
折れやすいため、部品の加工コストが高くなるという問
題点があった。The above-mentioned copper pipe 5 has a thickness of 0.7 mm, while the ring groove 4 provided in the brass body 1 corresponding thereto has a thickness of 0.7 mm. , A width of 0.4 and a depth of 1.0 mm. However, since the above-described ring groove 4 is formed by cutting, the cutting bit is very thin (the length of the cutting edge is about 2.5 mm for a cutting width of 0.4 mm).
However, there is a problem in that the cutting tool is difficult to manufacture, and the cutting tool is easily broken.
【０００６】[0006]
【課題を解決するための手段】本発明は、異種金属の抵
抗溶接に際して、従来切削加工によって形成されていた
黄銅製ボディのリング溝の加工に換え、プレスによるコ
イニング加工によってリング溝を形成するに際して、コ
イニング加工時にリングパンチの刃部によって余肉が流
通孔側へ押し出されてリング溝を変形させるが、この変
形を成形パンチで整形することにより、安価なコストで
ボディにリング溝を形成できる加工方法の提供を目的と
するものである。SUMMARY OF THE INVENTION The present invention provides a method for forming a ring groove by coining with a press, instead of forming a ring groove of a brass body which has been formed by conventional cutting, in resistance welding of dissimilar metals. During coining, the excess thickness is pushed out to the flow hole side by the blade portion of the ring punch to deform the ring groove, but by shaping this deformation with the forming punch, the ring groove can be formed in the body at low cost. It is intended to provide a method.
【０００７】つまり、本発明のコイニングによる抵抗溶
接用リング溝の成形方法は、黄銅製ボディ１の中心部に
設けられている冷媒の流通孔２の周りに、コイニング加
工によって細幅のリング溝４を形成するようにした抵抗
溶接用リング溝を形成するに際して、始めに、前記黄銅
製ボディ１の流通孔２に、整形パンチ１１下端部の膨出
部１１ａをボディに形成されるリング溝の深さよりも下
方に達する位置まで臨ませ、次に、前記ボディ１上面の
流通孔２の周りにリングパンチ１２の刃部１２ａを押し
当て、このリングパンチの刃部１２ａによってリング溝
４上端部分の余肉１ａが流通孔２側へ押し出されて斜め
に変形した状態にて細幅のリング溝４を成形し、その
後、前記リング溝４にリングパンチの刃部１２ａが嵌ま
り込んだ状態にて前記整形パンチ１１を上方に引き上
げ、整形パンチの膨出部１１ａによるしごき加工によっ
て、前記コイニング加工時に生じるリング溝開口付近の
内側えの広がりを整形し、まっすぐな細幅のリング溝４
が得られるようにしたことを特徴とするものである。In other words, the method of forming a ring groove for resistance welding by coining according to the present invention is a method of forming a narrow ring groove 4 around a coolant circulation hole 2 provided in the center of a brass body 1 by coining. When forming a ring groove for resistance welding to form a groove, first, the bulging portion 11a at the lower end of the shaping punch 11 is formed in the flow hole 2 of the body 1 made of brass at the depth of the ring groove formed in the body. Then, the blade portion 12a of the ring punch 12 is pressed around the circulation hole 2 on the upper surface of the body 1 and the remaining portion of the ring groove 4 at the upper end portion is pressed by the blade portion 12a of the ring punch. The narrow ring groove 4 is formed in a state where the meat 1a is extruded toward the flow hole 2 and is obliquely deformed, and then the ring groove 4 is fitted with the blade portion 12a of the ring punch. Pulling the shaping punch 11 upward, by ironing by bulging portion 11a of the shaping punch, the shape the inner example spread around the ring groove opening which occurs during coining, the straight narrow ring groove 4
Is obtained.
【０００８】[0008]
【発明の実施の形態】図１は、本発明のコイニングによ
るリング溝の成形工程を示す断面図である。この図にお
いて、成形金型１０は、上型台板に垂下状に固定された
ダイホルダー（何れも図示しない。）を介して適宜なボ
ルトにより固定されているリングパンチ１１と、該リン
グパンチ１１の中心孔に内挿されリングパンチから独立
して上下方向に可動整形パンチ１１とで構成されてい
る。尚、黄銅製ボディ１は、プレス機の下型台板（図示
しない。）上に適宜な治具によって固定されている。FIG. 1 is a sectional view showing a step of forming a ring groove by coining according to the present invention. In this figure, a molding die 10 includes a ring punch 11 fixed by appropriate bolts via a die holder (both not shown) fixed to an upper die base plate in a hanging manner, and the ring punch 11. And a movable shaping punch 11 that is vertically inserted independently of the ring punch. The brass body 1 is fixed on a lower base plate (not shown) of the press machine by an appropriate jig.
【０００９】前記整形パンチ１１は、軸の下方部分に、
前記ボディに形成されるリング溝４の深さよりも広幅の
ヌスミ部１１ｂが設けられると共にその下端に膨出部１
１ａが設けられている。The shaping punch 11 is provided at a lower portion of the shaft.
A slim portion 11b wider than the depth of the ring groove 4 formed in the body is provided, and a bulge portion 1 is provided at a lower end thereof.
1a is provided.
【００１０】前記リングパンチ１２は、中心部に整形パ
ンチを挿通させる孔が設けられると共にこの孔の周縁部
にはリング状の刃部１２ａが設けられている。The ring punch 12 is provided with a hole at the center thereof through which a shaping punch is inserted, and a ring-shaped blade portion 12a is provided at the periphery of the hole.
【００１１】次に、本発明によるコイニングによる抵抗
溶接用リング溝の成形方法を図１の工程図に基づいて詳
細に説明する。 (1) プレスの下台板上に適宜な治具を用いて黄銅製ボデ
ィ１をセットし、始めに、前記黄銅製ボディ１の流通孔
２に、整形パンチ１１下端部の膨出部１１ａをボディに
形成されるリング溝の深さよりも下方に達する位置まで
臨ませる。（図１の（Ａ）の状態） (2) 次に、前記ボディ１上面の流通孔２の周りにリング
パンチ１２の刃部１２ａを押し当てて細幅のリング溝４
を形成する。なお、このコイニング加工においては、リ
ングパンチの刃部１２ａによってコイニング溝４上端部
分の余肉１ａが流通孔２側へ押し出されてリング溝４を
斜めに変形させるようにしている。（図１の（Ｂ）の状
態） この理由は、例えば前記成形パンチ１１に変わるストレ
ートな芯金（図示なし）を用いてコイニング加工する
と、刃部１２ａの根本に過大な応力が生じて刃部１２ａ
の折損が著しく多くなるためである。 (3) その後、前記リング溝４にリングパンチの刃部１２
ａが嵌まり込んだ状態にて前記整形パンチ１１を上方に
引き上げ、整形パンチの膨出部１１ａによるしごき加工
を行う。（図１の（Ｃ）の状態） このしごき加工によって、図２に示す如く、前記コイニ
ング加工時に生じたリング溝４上端部の内側えの膨出部
分が整形され、まっすぐな細幅のリング溝４が得られる
ようになっている。Next, a method of forming a ring groove for resistance welding by coining according to the present invention will be described in detail with reference to the process chart of FIG. (1) The brass body 1 is set on the lower base plate of the press using an appropriate jig. First, the bulging portion 11 a at the lower end of the shaping punch 11 is inserted into the flow hole 2 of the brass body 1. To reach a position below the depth of the ring groove formed in the groove. (2) Next, the blade portion 12a of the ring punch 12 is pressed around the circulation hole 2 on the upper surface of the body 1 to form the narrow ring groove 4.
To form In this coining process, the excess thickness 1a at the upper end of the coining groove 4 is pushed out toward the flow hole 2 by the blade portion 12a of the ring punch, so that the ring groove 4 is obliquely deformed. (State (B) of FIG. 1) This is because, for example, when coining is performed using a straight metal core (not shown) instead of the forming punch 11, excessive stress is generated at the root of the blade portion 12a, and 12a
Is significantly increased. (3) Then, the blade 12 of the ring punch is inserted into the ring groove 4.
The shaping punch 11 is pulled up in a state where a is fitted, and ironing is performed by the bulging portion 11a of the shaping punch. (State (C) of FIG. 1) By this ironing, as shown in FIG. 2, the bulging portion of the inner edge of the upper end of the ring groove 4 generated at the time of the coining is shaped, and a straight narrow ring groove is formed. 4 is obtained.
【００１２】[0012]
【発明の効果】本発明のコイニングによる抵抗溶接用リ
ング溝の成形方法は、従来の切削加工に換え、プレスに
よるコイニング加工を行うに際して、コイニング加工時
に生じたリング溝４上端部の内側えの膨出を成形パンチ
によるしごきによって整形するという加工方法であるか
ら、成形パンチを折損させることなくまっすぐな細幅の
リング溝４が得られるようになっている。従って、プレ
スによるコイニングであるため、生産性が著しく向上し
て安価に部品が提供できるという有益な発明である。According to the method of forming a ring groove for resistance welding by coining of the present invention, when performing coining by pressing instead of conventional cutting, the expansion of the inner groove of the upper end of the ring groove 4 generated during coining is performed. Since the protrusion is shaped by ironing with a forming punch, a straight narrow ring groove 4 can be obtained without breaking the forming punch. Therefore, since coining is performed by pressing, the present invention is a useful invention that productivity is significantly improved and parts can be provided at low cost.
【図１】 本発明のコイニングによるリング溝の成形工
程を示す断面図 。FIG. 1 is a sectional view showing a step of forming a ring groove by coining according to the present invention.
【図２】 本発明により成形加工されたボディの断面
図。FIG. 2 is a cross-sectional view of a body formed by the present invention.
【図３】 従来の方法によってリング溝が形成された黄
銅製のボディに銅パイプが抵抗溶接された縦断面図 。FIG. 3 is a longitudinal sectional view in which a copper pipe is resistance-welded to a brass body having a ring groove formed by a conventional method.
１ 黄銅製ボディ、 １ａ 余肉、 ２
流通孔、４ リング溝、 ５ 銅パイプ、
１０ 成形金型、１１ 整形パンチ、 １１ａ
膨出部、 １１ｂ ヌスミ部、１２ リングパ
ンチ、 １２ａ 刃部。1 body made of brass, 1a extra meat, 2
Circulation hole, 4 ring groove, 5 copper pipe,
10 Mold, 11 Shaping Punch, 11a
Swelling part, 11b slim part, 12 ring punch, 12a blade part.
Claims (1)
冷媒の流通孔２の周りに、コイニング加工によって細幅
のリング溝４を形成するようにした抵抗溶接用リング溝
を形成するに際して、 始めに、前記黄銅製ボディ１の流通孔２に、整形パンチ
１１下端部の膨出部１１ａをボディに形成されるリング
溝の深さよりも下方に達する位置まで臨ませ、次に、前
記ボディ１上面の流通孔２の周りにリングパンチ１２の
刃部１２ａを押し当て、このリングパンチの刃部１２ａ
によってリング溝４上端部分の余肉１ａが流通孔２側へ
押し出されて斜めに変形した状態にて細幅のリング溝４
を成形し、 その後、前記リング溝４にリングパンチの刃部１２ａが
嵌まり込んだ状態にて前記整形パンチ１１を上方に引き
上げ、整形パンチの膨出部１１ａによるしごき加工によ
って、前記コイニング加工時に生じるリング溝開口付近
の内側えの広がりを整形し、まっすぐなリング溝がえら
れるようにしたことを特徴とするコイニングによる抵抗
溶接用リング溝の成形方法。When forming a ring groove for resistance welding in which a narrow ring groove is formed by coining around a coolant circulation hole provided in a central portion of a brass body. First, the bulging portion 11a at the lower end of the shaping punch 11 is made to face the flow hole 2 of the brass body 1 to a position below the depth of a ring groove formed in the body. 1, the blade 12a of the ring punch 12 is pressed around the circulation hole 2 on the upper surface, and the blade 12a of the ring punch is pressed.
In this state, the excess thickness 1a at the upper end of the ring groove 4 is pushed out toward the flow hole 2 and is obliquely deformed.
Then, the shaping punch 11 is pulled up in a state where the blade portion 12a of the ring punch is fitted into the ring groove 4, and ironing is performed by the bulging portion 11a of the shaping punch, so that the coining process is performed. A method for forming a ring groove for resistance welding by coining, characterized in that the generated inner groove near the opening of the ring groove is shaped to obtain a straight ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21254497A JP3517559B2 (en) | 1997-07-22 | 1997-07-22 | Method of forming ring groove for resistance welding by coining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21254497A JP3517559B2 (en) | 1997-07-22 | 1997-07-22 | Method of forming ring groove for resistance welding by coining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1133635A true JPH1133635A (en) | 1999-02-09 |
| JP3517559B2 JP3517559B2 (en) | 2004-04-12 |
Family
ID=16624447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21254497A Expired - Fee Related JP3517559B2 (en) | 1997-07-22 | 1997-07-22 | Method of forming ring groove for resistance welding by coining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3517559B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016368A1 (en) * | 2002-08-06 | 2004-02-26 | Kabushiki Kaisha Kobe Seiko Sho | Lead frame processing coining punch, method of manufacturing the coining punch, and lead frame |
| JP2008062274A (en) * | 2006-09-08 | 2008-03-21 | Akebono Brake Ind Co Ltd | Method of machining female screw |
| WO2023113271A1 (en) * | 2021-12-17 | 2023-06-22 | Hanon Systems | Manufacturing process for forming a sharp feature in an axial sealing fluid transport fitting |
-
1997
- 1997-07-22 JP JP21254497A patent/JP3517559B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016368A1 (en) * | 2002-08-06 | 2004-02-26 | Kabushiki Kaisha Kobe Seiko Sho | Lead frame processing coining punch, method of manufacturing the coining punch, and lead frame |
| JP2008062274A (en) * | 2006-09-08 | 2008-03-21 | Akebono Brake Ind Co Ltd | Method of machining female screw |
| WO2023113271A1 (en) * | 2021-12-17 | 2023-06-22 | Hanon Systems | Manufacturing process for forming a sharp feature in an axial sealing fluid transport fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3517559B2 (en) | 2004-04-12 |
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