JPS58166168A - Bellows - Google Patents
BellowsInfo
- Publication number
- JPS58166168A JPS58166168A JP57048879A JP4887982A JPS58166168A JP S58166168 A JPS58166168 A JP S58166168A JP 57048879 A JP57048879 A JP 57048879A JP 4887982 A JP4887982 A JP 4887982A JP S58166168 A JPS58166168 A JP S58166168A
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- unit
- laser beam
- end portions
- cylinder
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
- B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/63—Internally supporting the article during joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
- B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
- B29C66/83417—Roller, cylinder or drum types said rollers, cylinders or drums being hollow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
- B29C65/1641—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding making use of a reflector on the opposite side, e.g. a polished mandrel or a mirror
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/18—Pleated or corrugated hoses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/703—Bellows
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Diaphragms And Bellows (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【発明の詳細な説明】
(a) 技術分野の説明
本発明はベローズに係わ9、特に複数個のベローズを多
段継ぎにして長いベローズを構成した多段継ぎベローズ
に関する◇
(b) 従来技術の説明
一般に、ベローズはその製造方法上からの制約、あるい
はあtb長いベローズは圧縮時に座屈を生じ易くなる郷
の運出かう1個のベローズの長さには制限が与えられて
おり、その制限長さ以上のベローズを必要とするときは
弯を個のベローズを溶接等によって接合して多段継ぎベ
ローズとして用いることが多い〇
第1図は電流しゃ断を真空中で行なういわゆる真空しゃ
断器の真空バルブに多段継ぎベローズを使用した場合の
構造を示す。一般C二真空バルブは、第1図に示すよう
に七ツ建ツクあるいはガラス等の絶縁物上や成る絶縁容
161と固定側端板2および可動側端板3から構成され
た高真空の容器の中に、電路となる固定儒電軸4に固着
された固定電極5と、電路となる可動通電軸6に固着さ
れた可動電極7が対向して配置され、前記可動通電軸6
は軸受8に保持されてその軸方向に移動できるよう(ニ
なっている。また、真空パルプ容器内部を高真空に保ち
ながら前記可動通電軸6を動かし得るようにするために
、前記軸受8と可動通電軸6の間1j8mはベローズ9
でじゃ閉されている。ベローズ9の両端はl端を可動通
電軸6上C;固着されたフランジ101=、もう1端は
可動側端板3に設けられたベローズ受け11にろう付け
で封着してあシ、可動儒端板儒のベローズ端は可動通電
軸6に対しては0出に動き得る構造である。Detailed Description of the Invention (a) Description of the Technical Field The present invention relates to a bellows9, and particularly relates to a multi-jointed bellows in which a plurality of bellows are joined in multiple stages to form a long bellows◇ (b) Description of the prior art Generally, bellows have a limit on the length of each bellows due to the manufacturing method, or because long bellows are more likely to buckle during compression. When a bellows with a larger size is required, it is often used as a multi-stage jointed bellows by joining individual bellows by welding etc. Figure 1 shows a vacuum valve of a so-called vacuum breaker that interrupts current in a vacuum. The structure is shown when using a multi-step bellows. As shown in Fig. 1, a general C-2 vacuum valve is a high-vacuum container consisting of an insulating capacity 161 made of a seven-story building or on an insulating material such as glass, a fixed end plate 2, and a movable end plate 3. A fixed electrode 5 fixed to a fixed electric shaft 4 serving as an electric path and a movable electrode 7 fixed to a movable current-carrying shaft 6 serving as an electric path are arranged facing each other.
is held by the bearing 8 so that it can move in the axial direction.Also, in order to be able to move the movable current-carrying shaft 6 while maintaining the inside of the vacuum pulp container at a high vacuum, the bearing 8 and 1j8m between the movable current-carrying shafts 6 is a bellows 9
It's closed. Both ends of the bellows 9 have one end fixed to the flange 101 on the movable current-carrying shaft 6, and the other end sealed to the bellows receiver 11 provided on the movable end plate 3 by brazing. The bellows end of the bellows end plate has a structure that allows it to move to zero with respect to the movable energizing shaft 6.
マ九、高耐圧真空バルブになるほど、開極時の溶融によ
る接点消耗を極力減少させるため開極速度を速くし長ス
トロークにする傾向がある。そのため、例えば第1図C
二示した真空バルブでは3段atのベローズすなわち単
位ベローズ9a、9b、9cをそれぞれ接合部12a、
12bで接合し、伸縮ストロークを大きくし九構増がと
られている。Finally, the higher the pressure resistance of the vacuum valve, the faster the opening speed and the longer the stroke in order to minimize contact wear due to melting during opening. Therefore, for example, Figure 1C
In the vacuum valve shown in FIG.
It is joined at 12b, and the expansion and contraction stroke is increased by nine points.
このような構造の多段継ぎベローズを継ぎ合わせる場合
、ベローズは極〈薄板であり従来の抵抗溶接轡では溶融
量の制御が難しいため、ベローズどうしを直接接合する
ことは困難である。一般にこのような薄板どうしを溶接
接合する場合1;は、第2図に示すように被溶接材13
m$13bの端面13cを揃えて重ね合せておき、それ
をTIG溶接トーチ14により不活性ガス15でシール
ドしながら溶融させて接合するいわゆるへりアーク溶接
とよばれる方法がとられている。第3図はへりアーク溶
接で2段継ぎにしたベローズの断面図を示してお如、単
位ベローズ9aおよび9bを継ぎ目16で接続した場合
を示す。第3図の如き方法で接続したベローズの欠点と
しては、ベローズが伸長したときに継ぎ目16の内側が
第4図に示すように引き裂かれるように変形するため高
応力が発生して強度的にはあまシ丈布なベローズが得ら
れないことである。そこで高耐圧の真空バルブにおいて
は第5図および第6図に示すような構造が採用されてい
る。すなわち、単位ベローズ9aおヨヒ9bの端部17
a、17b 1mチップ18a、18bをへりアーク溶
接で固着しておく。しかるのちに第6図に示すようにチ
ップ18a、18bの頂部19をへりアーク溶接するも
のである。このようにすると、端部17での空隙の方向
が力の作用方向と直角にならず平行であるため、第4図
:;示したような引き裂かれる形のモードの変形をさけ
ることができ、かつ第4図の如き変形セード下におかれ
るチップ18の頂部19では、肉厚が任意にとることが
できるので十分に溶融させることができるため強固な溶
接が可能である。When joining multi-stage spliced bellows with such a structure, it is difficult to directly join the bellows together because the bellows are extremely thin plates and it is difficult to control the amount of melting using conventional resistance welding. Generally, when joining such thin plates together by welding (1), as shown in Fig. 2, the workpiece 13 is
A method called edge arc welding is used in which the end faces 13c of the m$13b are aligned and overlapped, and then they are melted and joined using a TIG welding torch 14 while shielding with an inert gas 15. FIG. 3 shows a cross-sectional view of a bellows made into a two-step joint by edge arc welding, showing a case in which unit bellows 9a and 9b are connected at a seam 16. A disadvantage of the bellows connected in the manner shown in Fig. 3 is that when the bellows is expanded, the inner side of the seam 16 deforms as if torn as shown in Fig. 4, which generates high stress and reduces the strength. The problem is that it is not possible to obtain bellows that are soft and long. Therefore, a structure as shown in FIGS. 5 and 6 is adopted in a high-voltage vacuum valve. That is, the end 17 of the unit bellows 9a and 9b
a, 17b 1m chips 18a, 18b are fixed by edge arc welding. Thereafter, as shown in FIG. 6, the tops 19 of the tips 18a and 18b are edge arc welded. In this way, the direction of the gap at the end 17 is not perpendicular to the direction of force action, but is parallel to it, so it is possible to avoid the tearing mode deformation as shown in Figure 4. Moreover, since the top part 19 of the chip 18 placed under the deformed shade as shown in FIG. 4 can have any thickness, it can be sufficiently melted and strong welding can be achieved.
前記の如きベローズとベローズの中間にチップをそう人
して接合する構造は巧みであり、なかなかの効果を有し
ている。しかしながら、チップの加工および接合の工数
が余計にかかること、ベローズとベローズの中間1ニペ
ローズに比べて質量の大きなチップが存在するため、高
速動作時に各単位ベローズ間の伸縮が同期せず異常応力
を生じ九す異常振動の原因となり易いことなどの問題も
有している。これらのことから、ベローズ本来の形とし
ては、余り急激な断面変化はない方がよい。The structure in which the tip is manually joined between the bellows as described above is clever and has a considerable effect. However, because it requires extra man-hours to process and join the chips, and because there is a chip that has a larger mass than the one pipette between the bellows, the expansion and contraction between each unit bellows is not synchronized during high-speed operation, resulting in abnormal stress. Another problem is that it tends to cause abnormal vibrations. For these reasons, it is preferable that the original shape of the bellows does not have too sudden a change in cross section.
(C) 発明の目的
本発明は、以上の欠点を除去して多段継ぎベローズにお
いて、各単位ベローズの接続をスムーズな形状で接合し
、強度的::も、特性的にも優れたベローズを提供する
ことにある。(C) Purpose of the Invention The present invention eliminates the above-mentioned drawbacks and provides a bellows with excellent strength and characteristics by joining each unit bellows in a smooth shape in a multi-stage jointed bellows. It's about doing.
(d) 発明の構成および作用 第7図は本発明の1実施例の構成を示す説明図である。(d) Structure and operation of the invention FIG. 7 is an explanatory diagram showing the configuration of one embodiment of the present invention.
接続しようとする単位ベローズ9 a * 9 bをベ
ローズの内径に合うように製作された銅製の円筒20に
嵌合せしめ、接合しようとするベローズの端末部21m
、21bを重ね合せて取付ける。円筒20は支持台22
の上1一回転で色るように支持されており、駆動部23
によって回転させることができる。レーザー光源24か
らはレーザ光25が発せられ、前記ベローズの端末部2
13.21b上に焦点を結ぶようにしである。また端末
部21aと21bが密着するように円筒20を裏側に押
当ててあシ円筒は熱伝導率がよくかつ被溶接部との間で
溶接性が悪い材料として鋼材でもって構成している。The unit bellows 9a*9b to be connected is fitted into a copper cylinder 20 manufactured to match the inner diameter of the bellows, and the end portion 21m of the bellows to be joined is fitted.
, 21b are mounted one on top of the other. The cylinder 20 is a support base 22
The drive unit 23 is supported in such a way that it turns when the
It can be rotated by Laser light 25 is emitted from the laser light source 24, and the end portion 2 of the bellows is
13. The focus should be on 21b. Further, the cylinder 20 is pressed against the back side so that the end portions 21a and 21b are in close contact with each other.The cylinder is made of steel, which is a material that has good thermal conductivity and poor weldability with the part to be welded.
レーザ光は高密度エネルギーを有しており、焦点を絞る
ことによって局部的に溶融させることができるので、本
実施例によれば薄板からなるベローズを前記第7図の如
く重ね板継手形状に接続することができる。Laser light has high-density energy and can be locally melted by narrowing its focus. According to this embodiment, the bellows made of thin plates are connected in a stacked plate joint shape as shown in Fig. 7 above. can do.
(e) 発明の効果
第8図は本実施例で接合した多段継ぎベローズの接合部
断面の詳細図である。単位ベローズ9a+9bの端末部
218#21bはレーザ光照射によって形成された溶接
金属26で強固に結合されており、また円周上に切れ目
なく接合されているから十分なる気密性を保持している
。ベローズが伸縮した時、かかる接合部には図示X X
’)j r?]口剪断カが作用するが、引き裂く形の
変形モードを生じるYY方向の力は作用しない。また、
第8図に示す接合断面は、ベローズの板厚Tと溶接金属
26の幅りが略等しい幅を有しているため、応力線27
の流れがなめらかであり応力がスムーズに流れる形状を
形成している。また第8図においては、一般に溶融金属
のだれによって形状が悪化しやすい溶接部の裏側が円筒
201=密着しているので形状が矯正されて平滑に形成
される。したがって本実施例のベローズは縮返し伸縮し
ても疲労破壊等を生じ難く、気密性保持に強い構造を有
してい゛る。(e) Effects of the Invention FIG. 8 is a detailed view of a cross section of the joint part of the multi-step jointed bellows joined in this embodiment. The end portions 218#21b of the unit bellows 9a+9b are firmly connected by a weld metal 26 formed by laser beam irradiation, and are joined without any discontinuity on the circumference, so that sufficient airtightness is maintained. When the bellows expands and contracts, such joints are
') j r? ] A shearing force acts, but no force in the YY direction causes a tearing mode of deformation. Also,
In the joint cross section shown in FIG. 8, the thickness T of the bellows and the width of the weld metal 26 are approximately equal, so the stress line 27
The flow is smooth, forming a shape that allows stress to flow smoothly. Further, in FIG. 8, the back side of the welded part, which is generally prone to deterioration in shape due to drooping of molten metal, is in close contact with the cylinder 201, so that the shape is corrected and formed smoothly. Therefore, the bellows of this embodiment is resistant to fatigue failure even when it is compressed, expanded and contracted, and has a structure that is strong in maintaining airtightness.
前記第1図において、7ランジ10またはベローズ受け
11とベローズ端部21aの接合は第9図に示すように
ろう付けによりろう付層28を形成して接合しているが
、真空バルブの如き高真空を保持するもののろう材加工
は気密性を確保するために注意深く加工を行ない、か゛
っ線型なる検査作業を必要とする。また、ろう付層には
ピンホール婢の空孔が散在してガスを包含しゃすいため
、真空度を阻害する原因となる。これt本発明の他の実
施例においては、第10図に示すようにベローズ9とベ
ローズ受け11をレーザ溶接で接合し溶接金属26を形
成することによって欠陥のない接続ができ、真空度、気
密性9強度特性尋において本信頼性の高い真空バルブを
得ることができる。In FIG. 1, the seven flange 10 or the bellows receiver 11 and the bellows end 21a are joined by brazing by forming a brazing layer 28 as shown in FIG. Even though a vacuum is maintained, processing of brazing filler metal requires careful processing to ensure airtightness, and requires linear inspection work. Further, the brazing layer is scattered with pores such as pinholes, which trap gas, which causes a problem in the degree of vacuum. In another embodiment of the present invention, the bellows 9 and the bellows receiver 11 are joined by laser welding to form a weld metal 26 as shown in FIG. A highly reliable vacuum valve can be obtained with a strength characteristic of 9.
次に、レーザ溶接においては被溶接物相互間に空隙がで
きないよう(=シて溶接しなければならないが、第7図
の実施例においてベローズの端末部21m、21bは薄
いので壕〈れ、うねり等が生じやすい。そこで本発明の
他の実施例では第11図に示すようにレーザ溶接機のノ
ズル29に車輪30を設け、ベローズの端末部21g
、21bを車輪30と円筒20との間で圧しなからレー
ザ光25を照射し溶接を行なうようにした−ので、被溶
接物間(−隙間を生じることなく良好な溶接を行なうこ
とができる。Next, in laser welding, the objects to be welded must be welded in such a way that there are no gaps between them, but in the embodiment shown in FIG. Therefore, in another embodiment of the present invention, a wheel 30 is provided on the nozzle 29 of the laser welding machine as shown in FIG.
, 21b are pressed between the wheel 30 and the cylinder 20 before welding is performed by irradiating the laser beam 25. Therefore, good welding can be performed without creating a gap between the objects to be welded.
第1図は多段継ぎベローズを用いた真空バルブの構造を
示す断面図、第2図はへりアーク溶接の方法を示す説明
図、第3図、第4図、第5図および第61!iIOは従
来の多段継ぎベローズの接合方法を示す断面図、第7図
は本発明の一実施例を示す説明図、第8図は本発明の効
果を示す断面図、第9図、第10図はベローズとベロー
ズ受けの接合に関する従来方法および本発明の他の実施
例による接合方法を示す断面図、第11図は本発明(:
よる他の実施例を示す正面図である。
9・・・多段継ぎベローズ
9a+9b*9c ・’−単単位クロース11・・ベロ
ーズ受け 20・・・円筒218.21b・・・ベロ
ーズの端末部25・・・レーザ光 30・・・車
輪(7317) 代理人 弁理士 則 近 憲 佑
(ほか1名)第1図
夕
第2図
第3図
第4図
/A
第5図
第6図
17α /7.5
第7図
□二抽
2
第8図
0
第9図
第10図
第111!1
一38′
[−Fig. 1 is a cross-sectional view showing the structure of a vacuum valve using multi-jointed bellows, Fig. 2 is an explanatory drawing showing the edge arc welding method, Figs. 3, 4, 5, and 61! iIO is a cross-sectional view showing a conventional multi-step bellows joining method, FIG. 7 is an explanatory view showing an embodiment of the present invention, FIG. 8 is a cross-sectional view showing the effects of the present invention, and FIGS. 9 and 10. 11 is a sectional view showing a conventional method of joining a bellows and a bellows receiver and a joining method according to another embodiment of the present invention, and FIG.
FIG. 7 is a front view showing another embodiment according to the present invention. 9...Multi-stage joint bellows 9a+9b*9c ・'-Single unit clause 11...Bellows receiver 20...Cylinder 218.21b...End portion of bellows 25...Laser light 30...Wheel (7317) Agent Patent Attorney Noriyuki Chika
(1 other person) Figure 1 Evening Figure 2 Figure 3 Figure 4 /A Figure 5 Figure 6 Figure 17α /7.5 Figure 7 □2 draw 2 Figure 8 0 Figure 9 Figure 10 Figure 111 !1 -38' [-
Claims (1)
ベローズにおいて、前記各単位ベローズの端末部を重ね
合わせ、これにレーザ光を照射し接合したことを特徴と
するベローズ◎A multi-stage jointed bellows formed by joining a plurality of unit bellows, characterized in that the end portions of each of the unit bellows are overlapped and joined by irradiating a laser beam thereon◎
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57048879A JPS58166168A (en) | 1982-03-29 | 1982-03-29 | Bellows |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57048879A JPS58166168A (en) | 1982-03-29 | 1982-03-29 | Bellows |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58166168A true JPS58166168A (en) | 1983-10-01 |
Family
ID=12815568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57048879A Pending JPS58166168A (en) | 1982-03-29 | 1982-03-29 | Bellows |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58166168A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02307690A (en) * | 1989-05-24 | 1990-12-20 | Eagle Ind Co Ltd | Joining method for bellows for piezoelectric element |
US5267959A (en) * | 1991-11-29 | 1993-12-07 | Schneider, Inc. | Laser bonding of angioplasty balloon catheters |
EP1405713A1 (en) * | 2002-10-02 | 2004-04-07 | Leister Process Technologies | Process and device for joining three-dimensional plastic parts by a laser beam |
-
1982
- 1982-03-29 JP JP57048879A patent/JPS58166168A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02307690A (en) * | 1989-05-24 | 1990-12-20 | Eagle Ind Co Ltd | Joining method for bellows for piezoelectric element |
US5267959A (en) * | 1991-11-29 | 1993-12-07 | Schneider, Inc. | Laser bonding of angioplasty balloon catheters |
US5501759A (en) * | 1991-11-29 | 1996-03-26 | Schneider (Usa) Inc. | Laser bonding of angioplasty balloon catheters |
EP0839634A3 (en) * | 1991-11-29 | 2001-02-14 | Schneider (Usa) Inc. | Laser bonding of angioplasty ballon catheters |
EP1405713A1 (en) * | 2002-10-02 | 2004-04-07 | Leister Process Technologies | Process and device for joining three-dimensional plastic parts by a laser beam |
US7211166B2 (en) | 2002-10-02 | 2007-05-01 | Leister Process Technologies | Method and device for joining workpieces made from plastic in three-dimensional form by means of a laser beam |
CN100450755C (en) * | 2002-10-02 | 2009-01-14 | 莱斯特加工技术公司 | Method and device for connecting three-D shaped plastic workpiece by laser beam |
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