JPH0787994B2 - Multi-point welding method in laser welding - Google Patents
Multi-point welding method in laser weldingInfo
- Publication number
- JPH0787994B2 JPH0787994B2 JP2167925A JP16792590A JPH0787994B2 JP H0787994 B2 JPH0787994 B2 JP H0787994B2 JP 2167925 A JP2167925 A JP 2167925A JP 16792590 A JP16792590 A JP 16792590A JP H0787994 B2 JPH0787994 B2 JP H0787994B2
- Authority
- JP
- Japan
- Prior art keywords
- pin
- welding
- small
- diameter
- laser
- 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.)
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- Laser Beam Processing (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、レーザ溶接における多点溶接方法に係り、特
に、時計，カメラ，内視鏡等に使用される小径ピンを溶
着固定するためのレーザ溶接における多点溶接方法に関
する。Description: TECHNICAL FIELD The present invention relates to a multi-point welding method in laser welding, and in particular, for welding and fixing a small diameter pin used in a timepiece, a camera, an endoscope and the like. The present invention relates to a multi-point welding method in laser welding.
［従来の技術］ 時計，カメラ，内視鏡等に使用される小径ピンの固定
は、対象が小さくかつ高精度を要求されるためにレーザ
光を用いた多点溶接により固着する手段が採用されてい
る。かかるレーザ光を用いたレーザ溶接により小径ピン
を被固定部に対して固定する従来技術を、第４図〜第６
図に例示する内視鏡１を用いて説明する。[Prior Art] A small-diameter pin used for a timepiece, a camera, an endoscope, etc. is fixed by a multi-point welding method using laser light because a small object and high accuracy are required. ing. A conventional technique for fixing a small-diameter pin to a fixed portion by laser welding using such laser light is described in FIGS.
A description will be given using the endoscope 1 illustrated in the drawing.
まず、第４図，第５図を用いて鉗子装置２を装備した内
視鏡１の構成について説明する。内視鏡１は、挿通自在
の可撓性管３と、鉗子装置２及び鉗子装置２を遠隔操作
するための操作部４等により構成されている。鉗子装置
２は、第５図にて示すごとく一対の鉗子カップ5,5等に
より構成されており、鉗子ッカップ5,5はリンク機構部
６、可撓性管３内に貫挿された操作ワイヤ７を介して操
作部４と接続構成されている。一対の鉗子カップ5,5
は、操作部４を介して操作ワイヤ７を進退操作すること
により、開閉自在の構成となっている。鉗子5,5は、ピ
ン８を介して開閉自在に連結されるとともに、リンク機
構部６を構成するリンク部材9,9、連結ピン10を介して
操作ワイヤ７の先端部に設けられたワイヤ継手11に連結
支持されている。なお、12で示めす部材は先端ヘッド、
13で示す部材は、先端ヘッド12に設けられたすり割開口
カバーで、このすり割開口カバー13内にリンク機構部6,
ワイヤ継手11が挿入されている。First, the configuration of the endoscope 1 equipped with the forceps device 2 will be described with reference to FIGS. 4 and 5. The endoscope 1 includes a flexible tube 3 that can be inserted, a forceps device 2, an operation unit 4 for remotely operating the forceps device 2, and the like. The forceps device 2 is composed of a pair of forceps cups 5 and 5 as shown in FIG. 5, and the forceps cups 5 and 5 are operation wires inserted through the link mechanism 6 and the flexible tube 3. It is connected to the operation unit 4 via 7. A pair of forceps cups 5,5
Is configured so that it can be opened and closed by operating the operation wire 7 forward and backward through the operation unit 4. The forceps 5, 5 are openably and closably connected via a pin 8, and a wire joint provided on the distal end portion of the operation wire 7 via the link members 9 and 9 and the connecting pin 10 constituting the link mechanism section 6. 11 is connected and supported. The member indicated by 12 is the tip head,
The member indicated by 13 is a slit opening cover provided in the tip head 12, and the link mechanism portion 6, 6 is provided in the slit opening cover 13.
The wire joint 11 is inserted.
一対の鉗子カップ5,5とリンク部材9,9との連結は、ピン
14を介して行なわれている。ピン14は、第６図にて示す
ごとくその一端部はレーザ光を用いたレーザ溶接にて鉗
子カップ５に固着されており、ピン14の他端部は皿状の
大径部14aに形設されてリンク部材９が抜出るのを防止
しうるように設定されている。ピン14は、外径寸法が0.
4mm、全長1mmに設定されており、ピン挿通用の孔として
鉗子カップ５、リンク部材９に貫設された孔15,16に設
定しうるように設定してある。各孔15,16の孔径は、ピ
ン14の外径寸法より0.01〜0.03mm程度大きく設定してあ
り、孔16におけるピン14の皿状大径部14aと対応する部
分には皿状のザグリ17が形設してある。The pair of forceps cups 5 and 5 and the link members 9 and 9 are connected by a pin.
Done through 14. As shown in FIG. 6, one end of the pin 14 is fixed to the forceps cup 5 by laser welding using laser light, and the other end of the pin 14 is formed in a dish-shaped large-diameter portion 14a. It is set so as to prevent the link member 9 from being pulled out. Pin 14 has an outer diameter of 0.
The length is set to 4 mm and the total length is set to 1 mm, and the forceps cup 5 and the holes 15 and 16 penetrating the link member 9 can be set as holes for inserting pins. The hole diameter of each hole 15 and 16 is set to be 0.01 to 0.03 mm larger than the outer diameter dimension of the pin 14, and a plate-shaped counterbore 17 is formed in a portion of the hole 16 corresponding to the plate-shaped large-diameter portion 14a. Is formed.
次に、小径のピン14をレーザ光を用いて鉗子カップ５に
レーザ溶接する方法について説明する。まず、鉗子カッ
プ５とリンク部材９とを重ね合せ、ザグリ17部側からピ
ン14を挿入する。次に、ピン14の一端部側（皿状大径部
14aと反対側）の周辺にレーザ光を照射し、ピン14と鉗
子カップ５とを溶着固定させる。レーザ溶接は、第７図
（ａ）にて示すように多点溶接とする。Next, a method of laser welding the small diameter pin 14 to the forceps cup 5 using laser light will be described. First, the forceps cup 5 and the link member 9 are overlapped with each other, and the pin 14 is inserted from the counterbore 17 side. Next, one end side of the pin 14 (the dish-shaped large diameter portion
Laser light is radiated to the periphery (on the side opposite to 14a) to fix the pin 14 and the forceps cup 5 by welding. Laser welding is multi-point welding as shown in FIG.
上記レーザ溶接により、鉗子カップ５とリンク部材９と
はピン14を介して互に回動自在に連結されるものであ
る。By the laser welding, the forceps cup 5 and the link member 9 are rotatably connected to each other via the pin 14.
［発明が解決しようとする問題点］ しかしながら、上記従来技術においては次のような問題
点があつた。即ち、第７図（ａ）にて示すごとく４点溶
接を行なうものとし、溶接順序をA,B,C,Dの順序にて行
なうものとすると、第１番目のＡ部の溶着操作の際に、
ピン14のＡ部は鉗子カップ５方向に引き寄せられて溶着
されることになる。即ち、ピン14の溶着部Ａは、第７図
（ａ），（ｂ）にて示すごとく鉗子カップ５と接合した
状態で溶着され、溶着部Ａと反対側（次工程の溶着部Ｂ
側）はピン14と孔15との間の直径方向の総間隙量分だけ
開くことになり、ピン14は第７図（ｂ）に示すごとく傾
きを生ずる。以下、B,C,D部をレーザ溶接しても、ピン1
4がＡ部の溶着の際に傾いてしまっているので、ピン14
の軸心と孔15,16との同心度がとれず、ピン14皿状大径
部14aと孔16のザグリ17部とが不自然な形で係接し、リ
ンク部材９の自由な回動が防げられるという問題があっ
た。また、Ｂ部の溶着部においては、直径方向の間隙の
総量分だけ開口するので、溶着を行なっても溶着強度が
小さく、ピン14と鉗子カップ５との溶着強度が必要以下
になり、品質の低下、信頼性の低下をもたらしていた。[Problems to be Solved by the Invention] However, the above-mentioned conventional technique has the following problems. That is, assuming that four-point welding is performed as shown in FIG. 7 (a) and the welding sequence is A, B, C, D, the welding operation of the first A portion is performed. To
The portion A of the pin 14 is pulled toward the forceps cup 5 and welded. That is, the welded portion A of the pin 14 is welded in a state of being joined to the forceps cup 5 as shown in FIGS. 7 (a) and 7 (b), and the welded portion A is opposite to the welded portion A (the welded portion B in the next step).
(Side) is opened by the total amount of the diametrical gap between the pin 14 and the hole 15, and the pin 14 is inclined as shown in FIG. 7 (b). Even if the B, C, and D parts are laser-welded,
Since 4 is tilted during welding of part A, pin 14
The concentricity between the shaft center of the pin and the holes 15 and 16 cannot be obtained, and the pin 14 large-diameter portion 14a of the pin 14 and the counterbore 17 of the hole 16 engage in an unnatural manner, so that the link member 9 can freely rotate. There was a problem that it could be prevented. Further, in the welded portion of the B portion, since the opening is opened by the total amount of the diametrical gap, the welding strength is small even if the welding is performed, and the welding strength between the pin 14 and the forceps cup 5 becomes less than necessary, and the quality is improved. It caused a decrease in reliability and reliability.
本発明は、上記従来技術の問題点に鑑みなされたもので
あって、小径ピンをレーザ光による多点溶接により被固
定物に溶着する場合に、ピンの傾きを生じさせることな
く溶着しうるものとし、品質の向上、信頼性の向上を図
ることを目的とする。The present invention has been made in view of the above-mentioned problems of the prior art, and when a small diameter pin is welded to an object to be fixed by multi-point welding with laser light, the pin can be welded without causing inclination of the pin. The purpose is to improve quality and reliability.
［問題点を解決するための手段］ 本発明は、第１図にて示すごとく、本体20に立設された
小径ピン21に孔22を有する被固定部23を介して嵌着し、
次に、小径ピン21の端面軸心部にレーザ光24を照射して
小径ピン21の端部の外径寸法を均一に拡大させて小径ピ
ンの端部外周と孔22との間の間隙をなくし、最後に、小
径ピン21の端部外周部をレーザ光にて数個所多点溶接す
るものである。[Means for Solving Problems] According to the present invention, as shown in FIG. 1, a small-diameter pin 21 erected on a main body 20 is fitted via a fixed portion 23 having a hole 22,
Next, the end face axis portion of the small diameter pin 21 is irradiated with the laser beam 24 to uniformly expand the outer diameter dimension of the end portion of the small diameter pin 21 to form a gap between the outer periphery of the end portion of the small diameter pin and the hole 22. Finally, the outer peripheral portion of the end of the small-diameter pin 21 is welded at several points by laser light.
［作用］ 上記方法によれば、孔22内に挿入された小径ピン21の端
部が軸心部に照射されるレーザ光24によりまず半径方向
に均一に拡大され、これにより孔22と小径ピン21との間
隙がなくなる。次に、小径ピン21の端部外周部に照射さ
れるレーザ光により、小径ピン21と被固定部材23とがレ
ーザ光が照射された部分だけ溶着される。[Operation] According to the above method, the end portion of the small-diameter pin 21 inserted into the hole 22 is first uniformly expanded in the radial direction by the laser beam 24 with which the axial center portion is irradiated, whereby the hole 22 and the small-diameter pin are formed. The gap with 21 disappears. Next, the laser beam applied to the outer peripheral portion of the end portion of the small diameter pin 21 welds the small diameter pin 21 and the fixed member 23 only to the portion irradiated with the laser light.
［実 施 例］ 第２図は、本発明に係るレーザ溶接における多点溶接方
法を実施するための第１の実施例を示すものであり、図
は内視鏡における鉗子５とリンク部材９との連結部の構
成を示している。鉗子５とリンク部材９との構成につい
ては、前記第７図にて示したものと同様であるので、同
一部材には同一符号を付してその説明を省略する。[Examples] Fig. 2 shows a first example for carrying out the multi-point welding method in laser welding according to the present invention. The figure shows forceps 5 and link members 9 in an endoscope. The structure of the connection part of is shown. Since the structure of the forceps 5 and the link member 9 is the same as that shown in FIG. 7, the same members are designated by the same reference numerals and the description thereof will be omitted.
次に、鉗子カップ５とリンク部材９とを連結する小径ピ
ン（例えば、直径0.4mm程度）をレーザ光を用いて溶着
する方法について説明する。Next, a method of welding a small-diameter pin (for example, a diameter of about 0.4 mm) that connects the forceps cup 5 and the link member 9 using laser light will be described.
第１工程 まず、リンク部材９をザグリ17部が下になるようにし、
下方からピン14を挿入する。この際、ピン14とリンク部
材９の互の皿状形設部14a,17が適合するように挿入する
のは勿論である。次に鉗子カップ５を、孔15がピン14に
嵌合するように上から重ね合わせ、鉗子カップ５とリン
ク部材９とをピン14を介して互に連結状態にする。な
を、鉗子カップ５とリンク部材９とを互のピン挿入用孔
15,16が一致するように重ね合せ、連結ピン14を挿入さ
せてもよいことは勿論である。この状態でレーザ加工機
にセットされているＸ−Ｙテーブル30上に固定する。Ｘ
−Ｙテーブル30は、図示を省略しているN/C装置により
Ｘ−Ｙ方向に自動制御しうるように設定されている。First step First, with the link member 9 so that the counterbore 17 parts face downward,
Insert pin 14 from below. At this time, it goes without saying that the pin 14 and the link member 9 are inserted so that the dish-shaped forming portions 14a and 17 of the link member 9 fit each other. Next, the forceps cup 5 is superposed from above so that the hole 15 fits into the pin 14, and the forceps cup 5 and the link member 9 are connected to each other via the pin 14. It is a hole for inserting the forceps cup 5 and the link member 9 into each other.
It goes without saying that the connecting pin 14 may be inserted by stacking so that 15, 16 are aligned. In this state, it is fixed on the XY table 30 set in the laser processing machine. X
The -Y table 30 is set so that it can be automatically controlled in the XY directions by an N / C device (not shown).
第２工程 次に、レーザ加工機からレーザ光を照射して多点溶接を
行なうのであるが、まず、レーザ光の照射点を第２図
（ａ）のＡ点、即ち小径ピン14の軸心位置にセットし、
このＡ点にレーザ光の照射を行なう。レーザ光は、ピン
14、鉗子カップ５の材質，大きさ等に適合せてYAGレー
ザ,CO2レーザ等を適宜用いる。また、レーザ光の強さ
は、ピン14の直径、ピン14と孔15との間の間隙量等に応
じて設定する。照射時間は数秒程度でよい。Second step Next, multi-point welding is performed by irradiating a laser beam from a laser processing machine. First, the irradiation point of the laser beam is point A in FIG. 2 (a), that is, the axial center of the small diameter pin 14. Set to the position,
The point A is irradiated with laser light. Laser light pin
14. A YAG laser, a CO 2 laser or the like is appropriately used depending on the material and size of the forceps cup 5. Further, the intensity of the laser light is set according to the diameter of the pin 14, the amount of the gap between the pin 14 and the hole 15, and the like. The irradiation time may be several seconds.
第３工程 次に、ピン14と孔15との接合部周辺にB,C,D,Eに示す順
序にてレーザ光をスポット的に照射し、ピン14の端部と
鉗子カップ５とを多点溶着する。なお、図においては、
B,C,D,Eの４ケ所を溶着する場合について例示したが、
これに限定されるものではなく、必要とされる溶接強度
に対応させて増減しうるものである。Third Step Next, the periphery of the joint between the pin 14 and the hole 15 is spotwise irradiated with laser light in the order shown in B, C, D, and E so that the end portion of the pin 14 and the forceps cup 5 can be moved. Spot welding. In the figure,
The case of welding 4 points of B, C, D and E was illustrated, but
It is not limited to this, but may be increased or decreased according to the required welding strength.
上記方法による作用について説明する。ピン14の端面軸
心部にレーザ光を照射すると、ピン14の端面部は均一に
半径方向に、即ち直径寸法が拡大する方向に変形せしめ
られ、この変形によりピン14における溶接部外周と鉗子
カップ５における孔15との間の間隙がなくなる。ピン14
の端面部の外径は、その軸心部に照射されるレーザ光に
より均一に拡大されるので、径拡大部以外のピン14外周
と孔15内周との間の間隙は一定に保持され、従つて、ピ
ン14と孔15とは同心状態となる。この状態で、ピン14と
孔15との接合部をB,C,D,Eの順序でスポット的に溶接す
るので、ピン14と孔15との同心度がとれた状態で溶着さ
れる。The operation of the above method will be described. When the end face axis of the pin 14 is irradiated with laser light, the end face of the pin 14 is uniformly deformed in the radial direction, that is, in the direction in which the diameter dimension increases, and by this deformation, the outer periphery of the welded portion of the pin 14 and the forceps cup. The gap between the hole 15 and the hole 15 is eliminated. Pin 14
Since the outer diameter of the end surface portion of the pin 14 is uniformly enlarged by the laser light irradiated to the axial center portion, the gap between the outer periphery of the pin 14 and the inner periphery of the hole 15 other than the diameter enlarged portion is held constant, Therefore, the pin 14 and the hole 15 are in a concentric state. In this state, since the joint portion between the pin 14 and the hole 15 is spot-welded in the order of B, C, D, E, the pin 14 and the hole 15 are welded in a concentric state.
従つて、本実施例による方法によれば、小径ピン14が傾
いたりラジアル方向（半径方向）にずれを生じたりする
ことなく溶着しうるものであり、その結果、リンク部材
９のスムーズな作動を確保しうるものである。又、ピン
14の溶接部の外径寸法を予め均一に拡大させて溶接する
ので、各溶接部B,C,D,Eの溶着強度を均一な所定強度に
設定することができる。これらのことから、製品として
の品質の向上，信頼性の向上を大幅に図ることができる
ものである。Therefore, according to the method of this embodiment, the small-diameter pin 14 can be welded without tilting or deviation in the radial direction (radial direction), and as a result, the smooth operation of the link member 9 can be achieved. It can be secured. Also pin
Since the outer diameters of the 14 welded parts are uniformly expanded in advance and the welding is performed, the welding strength of each welded part B, C, D, E can be set to a uniform predetermined strength. From these things, it is possible to greatly improve the quality and reliability of the product.
第２実施例 第３図に、本発明に係る方法を適用する第２の実施例を
示す。第３図は、第５図にて示した内視鏡における鉗子
カップ５周辺の構成と同様の構成を示すものであり、第
５図の平断面状態を示すものである。Second Embodiment FIG. 3 shows a second embodiment to which the method according to the present invention is applied. FIG. 3 shows a configuration similar to the configuration around the forceps cup 5 in the endoscope shown in FIG. 5, and shows a plan sectional view of FIG.
本実施例は、第１実施例にて説明したレーザ光による多
点溶接方法を鉗子カップ５とカバー13との連結ピン８及
びリンク部材９とワイヤ継手11との連結ピン10とに適用
した例を示すものである。This embodiment is an example in which the multi-point welding method using laser light described in the first embodiment is applied to the connecting pin 8 between the forceps cup 5 and the cover 13 and the connecting pin 10 between the link member 9 and the wire joint 11. Is shown.
上記各ピン８、10を溶着する工程及びその作用，効果は
前記第１実施例と同様であるので、その説明を省略す
る。The process of welding the pins 8 and 10 and the operation and effect thereof are the same as those in the first embodiment, and therefore the description thereof will be omitted.
なお、上記各実施例においては、内視鏡の構成部品であ
る小径ピンの溶着方法について説明したが、これに限定
されるものではなく、時計やカメラその他に用いられる
小径ピンの溶着手段として適用しうるのは勿論である。In each of the above embodiments, the method of welding the small-diameter pin that is a component of the endoscope has been described, but the present invention is not limited to this, and is applied as a welding means of a small-diameter pin used in a watch, a camera, or the like. Of course it is possible.
［発明の効果］ 以上のように、本発明によれば、製品の品質の向上，信
頼性の向上を図りうるものである。[Effects of the Invention] As described above, according to the present invention, it is possible to improve product quality and reliability.
第１図は本発明に係る方法を説明する図、第２図
（ａ），（ｂ）は本発明に係る方法を適用する第１の実
施例を示す説明図、第３図は本発明に係る方法を適用す
る第２の実施例を示す断面説明図、第４図，第５図，第
６図及び第７図は従来技術を説明するための図である。 ５……鉗子カップ ９……リンク部材 14……ピン 15,16……ピン嵌挿用孔 A,B,C,D……レーザ光の照射部FIG. 1 is a diagram for explaining the method according to the present invention, FIGS. 2 (a) and 2 (b) are explanatory diagrams showing a first embodiment to which the method according to the present invention is applied, and FIG. 3 is for the present invention. A sectional explanatory view showing a second embodiment to which such a method is applied, and FIGS. 4, 5, 6, and 7 are views for explaining a conventional technique. 5 ...... Forceps cup 9 ...... Link member 14 ...... Pin 15, 16 ...... Pin fitting insertion hole A, B, C, D ...... Laser light irradiation part
Claims (3)
し、前記小径ピンにおける端部軸心部にレーザ光を照射
して小径ピンの溶着部の径を均一に拡大し、小径ピンの
溶着部外周と前記小径ピン嵌挿用孔との間の間隙をなく
し、しかる後に、小径ピンの所定外周溶接部にレーザ光
を照射して溶着することを特徴とするレーザ溶接におけ
る多点溶接方法。1. A small-diameter pin is inserted into a hole formed on the side of a member to be welded, and a laser beam is irradiated to the end axis of the small-diameter pin to uniformly increase the diameter of the welded portion of the small-diameter pin. Multiple points in laser welding characterized by eliminating the gap between the outer periphery of the welded portion of the pin and the small-diameter pin fitting insertion hole, and then irradiating and welding the predetermined outer peripheral welded portion of the small-diameter pin with laser light. Welding method.
ーザ光は、小径ピンの直径、小径ピンのと小径ピン嵌挿
用孔との間の間隙の大小等に応じて照射条件が設定され
ることを特徴とする特許請求の範囲第１項記載のレーザ
溶接における多点溶接方法。2. A laser beam applied to an end axis of the small-diameter pin according to the diameter of the small-diameter pin, the size of the gap between the small-diameter pin and the small-diameter pin insertion hole, and the like. The multi-point welding method in laser welding according to claim 1, wherein:
るレーザ光は、必要とされる溶接強度に対応してその照
射数，強さが設定されることを特徴とする特許請求の範
囲第１記載のレーザ溶接における多点溶接方法。3. A laser beam with which a predetermined outer peripheral welded portion of the small diameter pin is irradiated, the irradiation number and intensity of the laser beam being set corresponding to required welding intensity. A multipoint welding method in laser welding according to the first aspect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167925A JPH0787994B2 (en) | 1990-06-26 | 1990-06-26 | Multi-point welding method in laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167925A JPH0787994B2 (en) | 1990-06-26 | 1990-06-26 | Multi-point welding method in laser welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455081A JPH0455081A (en) | 1992-02-21 |
| JPH0787994B2 true JPH0787994B2 (en) | 1995-09-27 |
Family
ID=15858604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2167925A Expired - Fee Related JPH0787994B2 (en) | 1990-06-26 | 1990-06-26 | Multi-point welding method in laser welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787994B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4295925B2 (en) | 2001-03-01 | 2009-07-15 | Ｈｏｙａ株式会社 | Bipolar high-frequency treatment instrument for endoscope |
-
1990
- 1990-06-26 JP JP2167925A patent/JPH0787994B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0455081A (en) | 1992-02-21 |
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