JPS635884A - Cylinder gun for spot welding - Google Patents

Cylinder gun for spot welding

Info

Publication number
JPS635884A
JPS635884A JP61150178A JP15017886A JPS635884A JP S635884 A JPS635884 A JP S635884A JP 61150178 A JP61150178 A JP 61150178A JP 15017886 A JP15017886 A JP 15017886A JP S635884 A JPS635884 A JP S635884A
Authority
JP
Japan
Prior art keywords
power supply
cylinder
chamber
piston
sealing
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
Application number
JP61150178A
Other languages
Japanese (ja)
Inventor
Yoshio Sato
良夫 佐藤
Yoji Funai
船井 洋二
Shinichiro Shibusawa
渋沢 慎一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dengensha Toa Co Ltd
Original Assignee
Dengensha Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dengensha Manufacturing Co Ltd filed Critical Dengensha Manufacturing Co Ltd
Priority to JP61150178A priority Critical patent/JPS635884A/en
Publication of JPS635884A publication Critical patent/JPS635884A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/30Features relating to electrodes
    • B23K11/31Electrode holders and actuating devices therefor
    • B23K11/314Spot welding guns, e.g. mounted on robots

Landscapes

  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Welding (AREA)

Abstract

PURPOSE:To prevent the breakdown of a sealing member, etc. by respectively providing the work chamber and sealing chamber of a piston inside the casing of a pressing cylinder and combining a feeding unit to the piston rod of the inside of the sealing chamber. CONSTITUTION:The bulkhead 11 provided with a sealing member 12 is provided on the casing of a pressing cylinder 3 and a piston work chamber A and sealing chamber B are respectively formed. The feeding unit 15 consisting of the flange type feeding part 17 fixed to a contactor 16 and piston rod 5 is incorporated inside the sealing chamber B. With this mechanism the current fed from the cylinder main body is passed to the rod 5 from the contactor 16 and the welding of the body 20 to be welded pressed between electrode tips 7, 8 is executed. Owing to the feeding contact face and sealing contact face being separated with a simple structure the breakdown of the sealing member is prevented and the durability of the pressing cylinder 3 is improved as well.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、スポット溶接ガンに関し、さらに詳しくは、
溶接電流を加圧シリンダ内のシリンダロッドを通して電
極チップに給電するための軸給電経路を形成したシリン
ダ・ガンに関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a spot welding gun, and more specifically, to a spot welding gun.
The present invention relates to a cylinder gun having an axial power supply path for supplying welding current to an electrode tip through a cylinder rod in a pressurized cylinder.

(従来の技術) 従来のこの種の技術は、例えば特公昭58−48275
号公報に記載されているように、スポット溶接ガンの加
圧シリンダの内面に、溶接電流を導通する給電プレート
を有し、この給電プレートの表面に密接して摺動するピ
ストンが、そのピストンロッドの軸方向へわずかに動き
得るように、ピストンロッドの後部にスプリングを介し
て嵌入した可焼性の集電プレートとの間に、複数の分割
された集電リングがピストンの加圧動作により給電プレ
ートと集電プレートの間で押圧、接触して上記ロッドに
電気的な通電経路を形成するものが知られている。
(Prior art) Conventional technology of this kind is, for example, disclosed in Japanese Patent Publication No. 58-48275.
As described in the publication, the pressure cylinder of the spot welding gun has a power supply plate that conducts welding current on the inner surface, and a piston that slides closely on the surface of this power supply plate is connected to the piston rod. A plurality of divided current collecting rings are connected to a combustible current collecting plate fitted via a spring at the rear of the piston rod so as to be able to move slightly in the axial direction of the piston. It is known that a plate and a current collecting plate are pressed and brought into contact with each other to form an electrical current passage to the rod.

(発明が解決しようとする問題点) しかしながら、この種の従来のものは、密接摺動部が給
電接触面とシール接触面の両目的を兼ねているため、高
精度に仕上げられたシール接触面は同一面で摺動給電を
繰返すうち、表面状態が粗(なりOリングやパツキン等
のシール部材を損傷し、シリンダのエアー漏れなど、ガ
ン自体、致命的な影響を受ける恐れがあった。
(Problem to be Solved by the Invention) However, in this type of conventional device, the close sliding part serves both as a power supply contact surface and a seal contact surface, so the seal contact surface is finished with high precision. Repeated sliding power feeding on the same surface caused the surface to become rough, damaging sealing members such as O-rings and gaskets, and potentially causing air leakage from the cylinder, which could be fatal to the gun itself.

(問題点を解決するための手段) そこで、本発明は、上記の欠点を一掃するもので、同一
加圧シリンダのケーシング内に、ピストンの作動室Aと
、この作動室Aとは別にシール部材等により分離、密封
された密閉室Bとを設け、しかも、この密閉室Bには上
記ピストンと一体的な動きをなし得る可動ロッドに溶接
電流通電路を形成する給電ユニット15を組入れたもの
である。
(Means for Solving the Problems) Therefore, the present invention aims to eliminate the above-mentioned drawbacks, and includes a working chamber A of the piston and a sealing member separate from this working chamber A in the casing of the same pressurizing cylinder. A sealed chamber B is provided, which is separated and sealed by a method such as the above, and a power supply unit 15 that forms a welding current energization path in a movable rod that can move integrally with the piston is incorporated in this sealed chamber B. be.

(作用) ゛そして、本発明では、同一加圧シリンダ内を、ピスト
ンの作動室と、給電用の密閉室とに仕切り、給電接触面
とシール接触面とを分離したから、同一面にシール接触
面と給電接触面との両面をもつ従来の加圧シリンダ・ガ
ンに比べ、シール表面状態を粗くするようなことがなく
、シール部材の早期損傷を防ぎ、加圧シリンダの耐久性
を向上すると共に、シリンダ外径を細(することができ
る。
(Function) In the present invention, the inside of the same pressurized cylinder is partitioned into the working chamber of the piston and the sealed chamber for power supply, and the power supply contact surface and the seal contact surface are separated, so that the seal contact is made on the same surface. Compared to conventional pressurized cylinder guns, which have both a surface and a power supply contact surface, the seal surface does not become rough, prevents early damage to the sealing member, and improves the durability of the pressurized cylinder. , the cylinder outer diameter can be made thinner.

(実施例) 以下、本発明の実施例について図面を参照して詳細に説
明する。
(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

第1図は、第1実施例として1経路の給電ユニットを内
設したCタイプのスポット溶接用シリンダ・ガンの一例
を示す断面図である。図中1は、スポット溶接ガンを示
し、2は、ガンアーム、3は加圧シリンダで、ガンアー
ムの一方の端部にボルトb−−−−により固着されてい
る。4は、加圧シリンダ3のピストンである。5は、こ
のピストンと共に往復移動する可動ロンド、6は可動ロ
ンドに着脱可能に装着したチップホルダ、7.8は電極
チップを示す、9は水冷アダプタで、電極チップ7の内
部に冷却水を給水するための水冷パイプ10が可動ロッ
ド5の内部−を貫通し、チップホルダ6及び電極チップ
7の水路と連通している。11は、隔壁で、ピストン4
がシリンダケーシング内を摺動して加圧室イ及び戻り°
室口を形成するピストン作動室Aと、後述する給電ユニ
ットを組入れた密閉室Bとが、可動ロッドの同一軸芯上
で隔壁11のシール部材12により気密に仕切られてい
る。すなわち、密閉室Bは、シリンダのエンドカバー1
3と隔壁とに設けられたシール部材12.14とで仕切
られ、可動ロッド5が移動し得る長さのストローク距離
2と空間を有している。15は密閉室に組込まれる給電
ユニットで、コンタクタ16が可動ロッド5に固着され
た鍔形給電舘17とシリンダ内面とに常時接触した形で
、リング状に配置されている。可動ロフト5の外周に固
着されたスプリング受け18には、上記ロンドを取巻く
ようにスプリングSが挿入されていて、このスプリング
Sの弾力を受けた絶縁性加圧リング19のテーパ面によ
ってコンタクタ16が、シリンダケーシングの内面と鍔
形給電部17とに押圧され、電気的な通電路を形成する
。上記コンタクタ16は、焼結金属から構成された摺動
給電材で、その−駒一駒にクサビ状の給電接触面が形成
されている。
FIG. 1 is a cross-sectional view showing an example of a C-type spot welding cylinder gun having a single-path power supply unit installed therein as a first embodiment. In the figure, 1 is a spot welding gun, 2 is a gun arm, and 3 is a pressure cylinder, which is fixed to one end of the gun arm by a bolt b. 4 is a piston of the pressurizing cylinder 3. 5 is a movable iron that reciprocates with this piston, 6 is a chip holder detachably attached to the movable iron, 7.8 is an electrode chip, and 9 is a water cooling adapter that supplies cooling water to the inside of the electrode chip 7. A water cooling pipe 10 for this purpose penetrates through the interior of the movable rod 5 and communicates with the water channels of the tip holder 6 and the electrode tip 7. 11 is a partition wall, and piston 4
slides inside the cylinder casing and returns to the pressurized chamber.
A piston operating chamber A forming a chamber opening and a sealed chamber B incorporating a power supply unit to be described later are airtightly partitioned by a sealing member 12 of a partition wall 11 on the same axis of a movable rod. That is, the sealed chamber B is the end cover 1 of the cylinder.
3 and a sealing member 12.14 provided on the partition wall, and has a stroke distance 2 and a space long enough for the movable rod 5 to move. Reference numeral 15 denotes a power supply unit built into the sealed chamber, in which a contactor 16 is arranged in a ring shape so as to be in constant contact with a collar-shaped power supply rod 17 fixed to the movable rod 5 and the inner surface of the cylinder. A spring S is inserted into a spring receiver 18 fixed to the outer periphery of the movable loft 5 so as to surround the rond, and the contactor 16 is moved by the tapered surface of the insulating pressure ring 19 that receives the elastic force of the spring S. , are pressed against the inner surface of the cylinder casing and the flange-shaped power supply portion 17 to form an electrical current path. The contactor 16 is a sliding power supply material made of sintered metal, and a wedge-shaped power supply contact surface is formed on each of its pieces.

なお、上記の密閉室Bには、エアーなど外部から水や油
の侵入を防ぐと共に、密閉室内の湿気からコンタクタな
どの給電部材を保護するために、導電性グリスが封入さ
れている。
Note that conductive grease is sealed in the sealed chamber B to prevent water and oil from entering from outside, such as air, and to protect power supply members such as contactors from moisture inside the sealed chamber.

上記の第1実施例において、シリンダ本体から給電され
た電流は、コンタクタ16を介して可動ロッド5に流れ
、電極チップ間7.8で加圧した被溶接物20に供給さ
れ溶接が遂行させる。
In the first embodiment described above, the current supplied from the cylinder body flows through the movable rod 5 through the contactor 16, and is supplied to the workpiece 20 pressurized between the electrode tips 7.8 to perform welding.

次に、本発明の他の応用例について図面を参照して説明
する。
Next, other application examples of the present invention will be described with reference to the drawings.

第2図は、第2実施例として2経路を含む給電ユニット
を内設したCタイプのロボット用のスポット溶接シリン
ダ・ガンの一例を示す要部断面図である。
FIG. 2 is a sectional view of a main part showing an example of a spot welding cylinder/gun for a C-type robot, which is equipped with a power supply unit including two paths as a second embodiment.

図中、第1実施例に記載の符号と同一構成品については
同一番号を記載し詳細は省略する。
In the drawings, the same numbers are used for components that are the same as those in the first embodiment, and details are omitted.

溶接トランス24の二次端子に接続された給電チューブ
22.23は、正負−組の導電部材からなり、絶縁チュ
ーブ21を介して同心的に重ね合わせたもので、同一加
圧シリンダ3の内部に装着された軸受け13及び14を
気密に貫通し、可動ロッド5と同一軸心上で相対的に移
動し得るように支持されている。給電チューブ22の内
部には可動ロフト5が移動し得る所定長さのストローク
l′と空間を有、する密閉室B′が隔壁11と軸受け1
3′の間に形成されている。また、加圧シリンダ3の内
部には、溶接ガン本体が電極加圧時の反力でフローティ
ング可能なストローク距離lと空間をもつ密閉室Bが隔
壁11と軸受け13との間に形成されている。
The power supply tubes 22 and 23 connected to the secondary terminals of the welding transformer 24 are made of positive and negative sets of conductive members, which are stacked concentrically via the insulating tube 21, and are placed inside the same pressurizing cylinder 3. It hermetically passes through the mounted bearings 13 and 14 and is supported so as to be movable relative to the movable rod 5 on the same axis. Inside the power supply tube 22, there is a sealed chamber B' having a stroke l' of a predetermined length and a space in which the movable loft 5 can move.
3'. Further, inside the pressurizing cylinder 3, a sealed chamber B is formed between the partition wall 11 and the bearing 13, and has a stroke distance l and a space in which the welding gun body can float due to the reaction force when the electrode is pressurized. .

これら各密閉IBSB’の軸受け13.13′には、各
密閉室への異物の侵入を防止するための金属スクレーパ
及びダストシール等が装着さレテイる。−方の密閉室B
′には給電ユニット15が組入れられている。こ給電ユ
ニット15は、可動ロッド5に固着されたスプリング受
け18とロッド円周方向に絶縁性の加圧リング19とが
配置され、さらにスプリング受け18と加圧リング19
の間に、上記ロッドを取巻くようにスプリングSが挿入
されていて、しかもこのスプリングS等の弾力を受けた
加圧リング19のテーパ面によって給電チューブ22の
内面と可動ロッド5の鍔形給電部17とに、押圧、接触
する複数の分割されたコンタクタ16がリング状に配置
されている。
A metal scraper, a dust seal, etc. are attached to the bearings 13, 13' of each of these sealed IBSB's to prevent foreign matter from entering each sealed chamber. - Sealed room B
' has a power supply unit 15 incorporated therein. This power supply unit 15 includes a spring receiver 18 fixed to the movable rod 5 and an insulating pressure ring 19 arranged in the circumferential direction of the rod, and further includes a spring receiver 18 and a pressure ring 19.
A spring S is inserted between the rods so as to surround the rod, and the tapered surface of the pressure ring 19 receives the elastic force of the spring S, and the inner surface of the power supply tube 22 and the collar-shaped power supply portion of the movable rod 5 are connected to each other. A plurality of divided contactors 16 are arranged in a ring shape to press and contact 17.

他方の密閉室Bには、給電ユニット15′が組み入れら
れている。この給電ユニット15′は、スプリング受け
18′と鍔形給電部17′とがシリンダ側に固着され、
このスプリング受け18′と鍔形給電部17′との間に
、給電チューブ23を取り巻くようにスプリングS′が
挿入されていて、しかもこのスプリング受′等の弾力を
受けた加圧リング19′のテーパ面によって、給電チュ
ーブ23と加圧シリンダ3の鍔形給電部17′とに押圧
、接触するコンタクタ16′が配置されている。
The other sealed chamber B incorporates a power supply unit 15'. This power supply unit 15' has a spring receiver 18' and a collar-shaped power supply part 17' fixed to the cylinder side.
A spring S' is inserted between the spring receiver 18' and the collar-shaped power supply part 17' so as to surround the power supply tube 23, and the pressure ring 19' receives the elastic force of the spring receiver'. A contactor 16' is arranged to press and contact the power supply tube 23 and the collar-shaped power supply portion 17' of the pressure cylinder 3 by means of a tapered surface.

なお、各密閉室B、B’にも上記目的の導電性グリスが
封入されている。
Incidentally, conductive grease for the above purpose is also sealed in each of the sealed chambers B and B'.

上記の第2実施例において、加圧シリンダ3の戻り室口
のエアーを排出し、加圧室イにエアーが送られると、ピ
ストン4と共に可動ロッド5が所定距離l′だけ前進し
て、電極チップ7がワーク20に当接する。そして、ワ
ークに加わる加圧力の反力で溶接ガン本体が右方へ所定
距離βたけフローテングしてガンアーム2の電極チップ
8(図省略)がワークに引き寄せられ、ワークの両側か
ら電極加圧する。この状態で溶  4接通電が行われる
と、溶接トランス24から流れた電流は、たとえば、矢
印のように給電チューブ22から入り、コンタクタ16
、鍔形給電部17、を経て可動ロッド5を通り電極チッ
プ7へ流れる。そして、−方の電極チップに流れた電流
は、ガンアーム2からシリンダ本体に流れ、鍔形給電部
17′を通りコンタクタ16′を経て給電チューブ23
から溶接トランス24に戻る。
In the second embodiment described above, when the air at the return chamber opening of the pressurizing cylinder 3 is discharged and the air is sent to the pressurizing chamber A, the movable rod 5 moves forward together with the piston 4 by a predetermined distance l', and the electrode The chip 7 comes into contact with the workpiece 20. Then, the welding gun body floats to the right by a predetermined distance β due to the reaction force of the pressurizing force applied to the workpiece, and the electrode tip 8 (not shown) of the gun arm 2 is drawn to the workpiece, applying electrode pressure to the workpiece from both sides. When the welding transformer 24 is energized in this state, the current flowing from the welding transformer 24 enters from the power supply tube 22 as shown by the arrow, and enters the contactor 16.
, the collar-shaped power supply portion 17 , and the movable rod 5 to the electrode tip 7 . Then, the current flowing to the - side electrode tip flows from the gun arm 2 to the cylinder body, passes through the collar-shaped power supply part 17', passes through the contactor 16', and then passes through the power supply tube 23.
The process then returns to the welding transformer 24.

(発明の効果) 以上、本発明によれば、同一加圧シリンダのケーシング
内に、ピストンの作動室Aと、給電用の密閉室Bとを仕
切って、この密閉室に給電ユニットを組み入れるだけで
、給電接触面とシール接触面とを簡単な構造によって分
けることができ、従来のようにシール部材の損傷等の要
因から来るシール密封の致命的弊害を抜本的に回避する
ことができて、しかもシリンダの径を細(することがで
きる。
(Effects of the Invention) As described above, according to the present invention, the working chamber A of the piston and the closed chamber B for power supply are partitioned in the casing of the same pressurizing cylinder, and the power supply unit is assembled in this closed chamber. , the power supply contact surface and the seal contact surface can be separated by a simple structure, and the fatal disadvantages of conventional seal sealing caused by factors such as damage to the seal member can be fundamentally avoided. The diameter of the cylinder can be made smaller.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の第1実施例を示すもので、1経路の
給電ユニットを内設したスポット溶接用シリンダ・ガン
の断面図。第2図は、本発明の第2実施例を示すもので
、2経路の給電ユニットを内設したスポット溶接用シリ
ンダ・ガンの断面図。
FIG. 1 shows a first embodiment of the present invention, and is a cross-sectional view of a spot welding cylinder gun equipped with a single-path power supply unit. FIG. 2 shows a second embodiment of the present invention, and is a sectional view of a spot welding cylinder gun equipped with a two-path power supply unit.

Claims (1)

【特許請求の範囲】[Claims] 同一加圧シリンダのケーシング内に、ピストンの作動室
Aと、この作動室とは別にシール部材等により気密に仕
切られた密閉室Bとを設け、しかもこの密閉室Bには上
記ピストンと一体的な動きをなし得る可動ロッドに溶接
電流通電路を形成する給電ユニットを組入れたことを特
徴とするスポット溶接用シリンダ・ガン。
In the casing of the same pressurized cylinder, there are provided a working chamber A of the piston and a sealed chamber B that is airtightly partitioned off from this working chamber by a sealing member, etc., and furthermore, this sealed chamber B is provided with a working chamber A that is integral with the piston. A cylinder gun for spot welding, characterized in that a power supply unit that forms a welding current conduction path is incorporated into a movable rod that can make various movements.
JP61150178A 1986-06-26 1986-06-26 Cylinder gun for spot welding Pending JPS635884A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61150178A JPS635884A (en) 1986-06-26 1986-06-26 Cylinder gun for spot welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61150178A JPS635884A (en) 1986-06-26 1986-06-26 Cylinder gun for spot welding

Publications (1)

Publication Number Publication Date
JPS635884A true JPS635884A (en) 1988-01-11

Family

ID=15491209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61150178A Pending JPS635884A (en) 1986-06-26 1986-06-26 Cylinder gun for spot welding

Country Status (1)

Country Link
JP (1) JPS635884A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0259428A (en) * 1988-08-22 1990-02-28 Res Inst For Prod Dev Magnetic particle and its production
JPH0639280U (en) * 1992-10-26 1994-05-24 株式会社電元社製作所 Spot welding gun

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0259428A (en) * 1988-08-22 1990-02-28 Res Inst For Prod Dev Magnetic particle and its production
JPH0639280U (en) * 1992-10-26 1994-05-24 株式会社電元社製作所 Spot welding gun

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