JPH0527266Y2 - - Google Patents
Info
- Publication number
- JPH0527266Y2 JPH0527266Y2 JP1987168839U JP16883987U JPH0527266Y2 JP H0527266 Y2 JPH0527266 Y2 JP H0527266Y2 JP 1987168839 U JP1987168839 U JP 1987168839U JP 16883987 U JP16883987 U JP 16883987U JP H0527266 Y2 JPH0527266 Y2 JP H0527266Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston rod
- piston
- ring
- guide rod
- current collecting
- 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
- 238000003466 welding Methods 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 13
- 239000000498 cooling water Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は抵抗溶接用ガンに係り、特に電極部材
に外部よりの給電部材を用いることなく、シリン
ダを介して電極部材に給電するに好適な抵抗溶接
用ガンに関する。[Detailed description of the invention] [Field of industrial application] The present invention relates to a resistance welding gun, and is particularly suitable for supplying power to an electrode member through a cylinder without using an external power supply member for the electrode member. Regarding resistance welding guns.
生産ラインなどに設けられ、自動化されたスポ
ツト溶接機などの抵抗溶接機では、ワークに電極
を押圧させるためにシリンダが用いられている。
このような抵抗溶接機は従来は第９図に示すよう
な構造のものが広く用いられていた。
BACKGROUND ART In automated resistance welding machines such as spot welding machines installed in production lines, cylinders are used to press electrodes against workpieces.
Conventionally, such a resistance welding machine having a structure as shown in FIG. 9 has been widely used.
すなわち、固定電極１との間にワーク２を挟持
する可動電極３は、装置に固定されたシリンダ４
から突出するピストンロツド５の先端に装着され
ており、このピストンロツド５と図示せぬ電源の
一方の電極６とはケーブル７により連結されてい
る。そして電源の他方の電極と固定電極１とを図
示せぬケーブルで接続して、両電極１，３の間に
大電流を流してワーク２の溶接作業を行なつてい
る。 That is, the movable electrode 3 which holds the workpiece 2 between itself and the fixed electrode 1 is fixed to the cylinder 4 of the device.
The piston rod 5 is attached to the tip of the piston rod 5 protruding from the workpiece 2, and this piston rod 5 is connected to one electrode 6 of a power source (not shown) by a cable 7. The other electrode of the power source is connected to the fixed electrode 1 by a cable (not shown), and a large current is passed between the two electrodes 1, 3 to weld the workpiece 2.
また、この種の給電技術をしては特開昭51−
54054号、特開昭55−75886号、特開昭56−9082
号、実開昭56−152185号、実開昭59−102275号各
広報に記載された提案が公知である。 In addition, this type of power supply technology was first published in Japanese Patent Application Laid-Open No. 1983-
No. 54054, JP-A-55-75886, JP-A-56-9082
The proposals described in the publications No. 1, No. 152185, U.S. Pat.
そして、これらの公知のものはいずれも加圧シ
リンダ内部に給電機構を収容し、シリンダの軸心
から電極部に溶接電流を給電するものである。 All of these known devices house a power feeding mechanism inside a pressurizing cylinder, and feed welding current from the axis of the cylinder to the electrode portion.
第９図に示す従来の抵抗溶接機によると、両電
極１，３間にワーク２を挟持して押圧するため
に、シリンダ４内に圧力流体を導入してピストン
ロツド５を前進、後退させるようになつている。
そしてピストンロツド５の先端に連結されたケー
ブル７もピストンロツド５の動きに従つて往復移
動する。この結果、一端が電源の一方の電極６に
固定され他端が往復移動するケーブル７は、溶接
作業中に常に折曲げ変形が繰り返され損傷しやす
いという問題があつた。また移動するケーブル７
の取付スペースを確保する必要があるために、装
置の小形化に対する障害となつていた。
According to the conventional resistance welding machine shown in FIG. 9, in order to clamp and press the workpiece 2 between the electrodes 1 and 3, pressure fluid is introduced into the cylinder 4 to move the piston rod 5 forward and backward. It's summery.
The cable 7 connected to the tip of the piston rod 5 also reciprocates in accordance with the movement of the piston rod 5. As a result, the cable 7, which has one end fixed to one electrode 6 of the power source and the other end moves back and forth, has a problem in that it is constantly bent and deformed repeatedly during welding work and is easily damaged. Cable 7 that moves again
Since it is necessary to secure installation space for the device, this has been an obstacle to downsizing the device.
また、前記５件の広報による提案はいずれも上
記問題点を解決するために、固定されたシリンダ
にケーブルを連結し、このシリンダから移動する
ピストンロツドに効率よく大電流を供給するよう
にしたものであるが、本考案とは構造を異にし、
導通部の圧接力が不足のため、密着性が悪く抵抗
が大きく、大電流が供給できないという問題があ
つた。特に電極に対する冷却水の供給については
配慮されていなかつた。 Furthermore, in order to solve the above-mentioned problems, all of the above five PR proposals involved connecting a cable to a fixed cylinder and efficiently supplying a large current to the moving piston rod from this cylinder. However, the structure is different from the present invention,
There was a problem in that the pressure contact force of the conductive part was insufficient, resulting in poor adhesion and high resistance, making it impossible to supply a large current. In particular, no consideration was given to the supply of cooling water to the electrodes.
本考案は上記事情に鑑みてなされたものであ
り、押圧シリンダ側からピストンロツドに確実に
大電流を供給でき、ケーブルの取付スペースを小
さくすることができる耐久性に優れた抵抗溶接用
ガンを提供することを目的とする。 The present invention has been made in view of the above circumstances, and provides a highly durable resistance welding gun that can reliably supply a large current to the piston rod from the pressing cylinder side and can reduce the space for installing the cable. The purpose is to
本考案は上記目的を達成するために、流体の加
圧力によつてシリンダ内を移動するピストンロツ
ドと、該ピストンロツドの前記シリンダから突出
した一端に固着されて前後進する電極部材とから
なり、前記ピストンロツドの少なくとも一部を絶
縁処理された管状に形成し、該管状部内にピスト
ンロツドの内周面と摺動自在に嵌合し、かつ一端
が前記シリンダに支持されたガイドロツドを設
け、前記ピストンロツドの電極部材が固着された
端部と反対側の一端に軸方向に一定範囲内で移動
可能な絶縁部材からなるピストンを装着してなる
抵抗溶接用ガンにおいて、前記ピストンの内周面
でピストンロツドの鍔部とピストンの底部との間
にシリンダ状の弾性部材を装着し、該弾性部材の
内径内には相互にテーパ面を介して係合するリン
グ状の絶縁部材からなる押圧部材とリング状の集
電部材とを装着し、さらに該集電部材の内周部に
リング状のスプリングを装着し、前記ピストンが
電極部材側に押圧されたときに前記集電部材が内
周部に装着されたリング状のスプリングを押し潰
して前記ガイドロツドに密着するとともに、前記
ピストンロツドの鍔部にも密着するようにしたも
のである。
In order to achieve the above object, the present invention comprises a piston rod that moves within a cylinder by the pressurizing force of a fluid, and an electrode member that is fixed to one end of the piston rod protruding from the cylinder and moves back and forth. at least a portion thereof is formed into an insulated tubular shape, and a guide rod is provided in the tubular portion to be slidably fitted to the inner circumferential surface of the piston rod and whose one end is supported by the cylinder, and an electrode member of the piston rod is provided. In a resistance welding gun, which is equipped with a piston made of an insulating member that is movable within a certain range in the axial direction at one end opposite to the end to which the A cylindrical elastic member is installed between the bottom of the piston and the inner diameter of the elastic member includes a pressing member made of a ring-shaped insulating member and a ring-shaped current collecting member that engage with each other via a tapered surface. and further a ring-shaped spring is attached to the inner periphery of the current collecting member, and when the piston is pressed toward the electrode member, the ring-shaped spring attached to the inner periphery of the current collecting member The spring is compressed so that it comes into close contact with the guide rod, and also with the flange of the piston rod.
上記の構成によると、シリンダ内に流体が導入
されピストンを加圧すると、ピストンの先端に装
着された可動側電極部材がワークを固定側電極部
材に対し加圧し、ガイドロツド及びピストンロツ
ドを介して通電される可動側電極部材と、直接通
電される固定側電極部材との間に挟持されたワー
クの抵抗溶接が行なわれる。このとき、ガイドロ
ツドとピストンロツドとの間の通電はピストンに
より押圧部材を介してくさび状に押圧される集電
部材が内周部に装着されたリング状のスプリング
を押し潰して前記ガイドロツドに密着するととも
に、ピストンロツドの端面とに密着するので、ほ
とんど接触抵抗なく大電流を通電して良好な抵抗
溶接を行なうことができる。
According to the above configuration, when fluid is introduced into the cylinder and pressurizes the piston, the movable electrode member attached to the tip of the piston pressurizes the workpiece against the fixed electrode member, and electricity is supplied through the guide rod and the piston rod. Resistance welding is performed on a workpiece that is held between a movable electrode member that is directly energized and a fixed electrode member that is directly energized. At this time, the current flow between the guide rod and the piston rod is carried out when the current collecting member pressed in a wedge shape by the piston via the pressing member crushes the ring-shaped spring attached to the inner circumference and comes into close contact with the guide rod. , and the end face of the piston rod, it is possible to conduct a large current and perform good resistance welding with almost no contact resistance.
以下、本考案に係る抵抗溶接用ガンの一実施例
を図面を参照して説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a resistance welding gun according to the present invention will be described below with reference to the drawings.
第１図乃至第７図に本考案の一実施例を示す。
第１図において、シリンダ１１の外筒１２の前後
端にはそれぞれ前部カバー１３、後部カバー１４
が固着されており、後部カバー１４には前記外筒
１２内に同軸上に設けられたガイドロツド１５の
一端が固定されている。このガイドロツド１５の
後部カバー１４から突出した一端には、電源の一
方の電極に一端が接続された図示せぬケーブルま
たはプレートの他端が固定されている。 An embodiment of the present invention is shown in FIGS. 1 to 7.
In FIG. 1, a front cover 13 and a rear cover 14 are provided at the front and rear ends of the outer tube 12 of the cylinder 11, respectively.
is fixed to the rear cover 14, and one end of a guide rod 15 coaxially provided within the outer cylinder 12 is fixed to the rear cover 14. To one end of the guide rod 15 protruding from the rear cover 14 is fixed the other end of a cable or plate (not shown), one end of which is connected to one electrode of a power source.
一方、前記前部カバー１３の中心には前記外筒
１２に対し同軸上において摺動可能にピストンロ
ツド１６が装着されており、このピストンロツド
１６の前部カバー１３から突出する一端には可動
側電極１７が着脱可能に装着されている。そして
ピストンロツド１６の電極１７が装着された側と
反対側からは同軸上に内面に絶縁処理が施された
案内孔１６ａが形成されていて、この案内孔１６
ａに前記ガイドロツド１５が摺動可能に嵌合装着
され、ガイドロツド１５によりピストンロツド１
６が外筒１２の中心軸上を移動可能に案内されて
いる。またピストンロツド１６の後部カバー１４
側の一端には鍔部１６ｂが形成されていて、この
鍔部１６ｂの外周には有底円筒状の絶縁部材で形
成されたピストン１８の解放端側の内周が摺動可
能に装着されている。 On the other hand, a piston rod 16 is attached to the center of the front cover 13 so as to be able to slide coaxially with respect to the outer cylinder 12, and a movable electrode 17 is attached to one end of the piston rod 16 protruding from the front cover 13. is attached removably. A guide hole 16a whose inner surface is insulated is coaxially formed from the side opposite to the side where the electrode 17 of the piston rod 16 is attached.
The guide rod 15 is slidably fitted and mounted on the piston rod 1a.
6 is movably guided on the central axis of the outer cylinder 12. Also, the rear cover 14 of the piston rod 16
A flange portion 16b is formed at one end of the side, and the inner periphery of the open end side of a piston 18 formed of a bottomed cylindrical insulating member is slidably attached to the outer periphery of the flange portion 16b. There is.
このピストン１８は第２図に中心線に対し片側
を拡大して示すように、解放端の外周にはリング
状の係止部材１９が螺着されており、この係止部
材１９の端面と前記ピストンロツド１６の鍔部１
６ｂとが係合して、ピストン１８の後部カバー１
４側への移動が係止されている。またピストン１
８の外周には例えば２個のＯ−リング２０が装着
されており、外筒１２の内周面と摺動可能に当接
してピストン１８の軸方向の両側を液密にシール
している。ピストン１８の内周面で前記ピストン
ロツド１６の鍔部１６ｂとピストン１８の底部１
８ａの内面との間にはリング状の弾性部材２１が
装着されており、さらにこの弾性部材２１の内径
内にはそれぞれ第３，４図及び第５，６図に示す
ようなリング状の押圧部材２２及び集電部材２３
が装着されている。 As shown in FIG. 2 with one side enlarged with respect to the center line, this piston 18 has a ring-shaped locking member 19 screwed onto the outer periphery of the open end, and the end surface of this locking member 19 and the Flange 1 of piston rod 16
6b is engaged with the rear cover 1 of the piston 18.
Movement to the 4th side is locked. Also piston 1
For example, two O-rings 20 are attached to the outer periphery of the piston 18, and are slidably abutted against the inner peripheral surface of the outer cylinder 12 to liquid-tightly seal both sides of the piston 18 in the axial direction. The flange 16b of the piston rod 16 and the bottom 1 of the piston 18 on the inner peripheral surface of the piston 18.
A ring-shaped elastic member 21 is installed between the inner surface of the elastic member 8a, and a ring-shaped pressure member 21 is provided within the inner diameter of the elastic member 21, as shown in FIGS. Member 22 and current collecting member 23
is installed.
この押圧部材２２は絶縁部材で形成されており
その一方の端面２２ａは前記ピストン１８の底部
１８ａに当接し、他方の端面の内周部には外側に
向かつて拡径するテーパ面２２ｂが形成されてい
る。 This pressing member 22 is made of an insulating material, and one end surface 22a thereof is in contact with the bottom 18a of the piston 18, and the other end surface has a tapered surface 22b whose diameter increases outward. ing.
一方、前記集電部材２３の一方の端面２３ａは
前記ピストンロツド１６の鍔部１６ｂの端面に当
接し、他方の端面の外周部には前記押圧部材２２
に形成されたテーパ面２２ｂと係合するテーパ面
２３ｂが形成されている。また、集電部材２３は
可撓性導電部材で形成された給電部２３ｃと絶縁
部材で形成された絶縁部２３ｄとが交互に配設さ
れてなつている。さらに集電部材２３の内周部に
はリング状のスプリング２４が装着されており、
集電部材２３がピストン１８とともにガイドロツ
ド１５の外周面に沿つて移動するときに、このス
プリング２４によつて集電部材２３の内周面をガ
イドロツド１５の外周面から離脱させて摩耗を防
止するようになつている。 On the other hand, one end surface 23a of the current collecting member 23 is in contact with the end surface of the flange 16b of the piston rod 16, and the outer periphery of the other end surface is provided with the pressing member 22.
A tapered surface 23b is formed to engage with the tapered surface 22b formed in the. Further, the current collecting member 23 is made up of alternating power supply portions 23c formed of a flexible conductive member and insulating portions 23d formed of an insulating material. Furthermore, a ring-shaped spring 24 is attached to the inner circumference of the current collecting member 23.
When the current collecting member 23 moves along the outer peripheral surface of the guide rod 15 together with the piston 18, the spring 24 causes the inner peripheral surface of the current collecting member 23 to separate from the outer peripheral surface of the guide rod 15 to prevent wear. It's getting old.
一方、前記ガイドロツド１５の中心には前記電
極部材１７側に開口する冷却水通路２５が軸方向
に形成されており、開口側の反対側の端部には給
水ポート２６が設けられていて、この給水ポート
２６には図示せぬ給水管が接続されている。また
この冷却水通路２５内には一端がピストンロツド
１６の電極部材１７側に固定された冷却パイプ２
７が摺動自在に装着されており、この冷却パイプ
２７が固定されたピストンロツド１６の端部に
は、この冷却パイプ２７と電極部材１７内とを連
通する貫通孔１６ｃが形成されている。 On the other hand, a cooling water passage 25 that opens toward the electrode member 17 is formed in the center of the guide rod 15 in the axial direction, and a water supply port 26 is provided at the end opposite to the opening. A water supply pipe (not shown) is connected to the water supply port 26. Also, inside this cooling water passage 25, there is a cooling pipe 2 whose one end is fixed to the electrode member 17 side of the piston rod 16.
7 is slidably attached thereto, and a through hole 16c is formed at the end of the piston rod 16 to which the cooling pipe 27 is fixed.
次に本実施例の動作を説明する。後部カバー１
４に形成された通路１４ａを介して後部カバー１
４とピストン１８との間に形成された空間２８内
にエアが供給されると、ピストン１８が電極部材
１７の方向に押圧される。この押圧されたピスト
ン１８は弾性部材２１、押圧部材２２、集電部材
２３を介してピストンロツド１６を押し、ピスト
ンロツド１６の先端に装着された電極部材１７が
第７図に示すようにワーク２９に当接するまでピ
ストンロツド１６は移動する。この間集電部材２
３はスプリング２４の付勢力によりガイドロツド
１５の外周面より離脱しているので移動の抵抗に
はならず、また摩耗も発生しない。 Next, the operation of this embodiment will be explained. Rear cover 1
4 through the passage 14a formed in the rear cover 1.
When air is supplied into the space 28 formed between the piston 18 and the piston 18, the piston 18 is pressed in the direction of the electrode member 17. This pressed piston 18 pushes the piston rod 16 via the elastic member 21, the pressing member 22, and the current collecting member 23, and the electrode member 17 attached to the tip of the piston rod 16 hits the workpiece 29 as shown in FIG. The piston rod 16 moves until it makes contact. During this time, the current collecting member 2
Since the guide rod 3 is separated from the outer peripheral surface of the guide rod 15 by the biasing force of the spring 24, it does not provide resistance to movement and does not cause wear.
さらに、前記エアを供給すると電極部材１７が
ワーク２９によつて移動を係止されているので、
弾性部材２１がピストンロツド１６の鍔部１６ｂ
とピストン１８の内面との間で圧縮され、ピスト
ン１８はピストンロツド１６の鍔部１６ｂに近づ
く方向に移動する。この結果、押圧部材２２も同
方向に移動し、テーパ面２２ｂ，２３ｂを介して
くさび作用によつて集電部材２３をガイドロツド
１５の外周面に押圧する。同時に集電部材２３は
ピストン１８の移動方向に押圧されるため、集電
部材２３の端面２３ａがピストンロツド１６の鍔
部１６ｂの面に押圧される。 Furthermore, since the electrode member 17 is stopped from moving by the workpiece 29 when the air is supplied,
The elastic member 21 is attached to the flange 16b of the piston rod 16.
and the inner surface of the piston 18, and the piston 18 moves in a direction approaching the flange 16b of the piston rod 16. As a result, the pressing member 22 also moves in the same direction and presses the current collecting member 23 against the outer peripheral surface of the guide rod 15 by a wedge action via the tapered surfaces 22b and 23b. At the same time, since the current collecting member 23 is pressed in the moving direction of the piston 18, the end surface 23a of the current collecting member 23 is pressed against the surface of the flange 16b of the piston rod 16.
そして、ガイドロツド１５に通電された大電流
は集電部材２３及びピストンロツド１６を介して
電極部材１７にほとんど接触抵抗なく流れ、図示
せぬ固定電極との間に挟持されたワーク２９を確
実に溶接することができる。このとき弾性部材２
１は電極部材１７がワーク２９に当接したときの
衝撃圧力を弱め、ガイドロツド１５及びピストン
ロツド１６の損傷を防止し、接触時の圧力を一定
に保つ作用をする。 The large current applied to the guide rod 15 flows through the current collecting member 23 and the piston rod 16 to the electrode member 17 with almost no contact resistance, thereby reliably welding the workpiece 29 held between it and a fixed electrode (not shown). be able to. At this time, elastic member 2
1 weakens the impact pressure when the electrode member 17 contacts the workpiece 29, prevents damage to the guide rod 15 and piston rod 16, and serves to keep the pressure constant during contact.
また、ピストン１８及び押圧部材２２は絶縁部
材で形成されているので電蝕を起こすことはな
い。同様にピストンロツド１６に形成された案内
孔１６ａの内面も絶縁処理されているので電蝕を
防止することができる。さらに電極部材１７には
冷却パイプ２７を介して冷却水が供給されている
ので、溶接時に発生する熱を除去することができ
る。 Further, since the piston 18 and the pressing member 22 are made of an insulating material, electrolytic corrosion will not occur. Similarly, since the inner surface of the guide hole 16a formed in the piston rod 16 is also insulated, electrolytic corrosion can be prevented. Furthermore, since cooling water is supplied to the electrode member 17 via the cooling pipe 27, heat generated during welding can be removed.
本実施例によれば、可動側の電極部材１７に供
給される電流は固定されたガイドロツド１５を介
して流れるので、ケーブルの両端を固定すること
ができ、ケーブルの損傷の発生を防止し、しかも
ケーブルの占めるスペースを小さくして溶接装置
を小型化することができる。そして固定部材であ
るガイドロツド１５から移動部材であるピストン
ロツド１６への導電は、溶接時に両者に密着押圧
される集電部材２３を介して行なわれるので、接
触抵抗はほとんどなく良好な抵抗溶接を行なうこ
とができる。さらに冷却水通路２５が固定してい
るので、確実に冷却水を電極部材１７に送ること
ができる。 According to this embodiment, the current supplied to the movable electrode member 17 flows through the fixed guide rod 15, so both ends of the cable can be fixed, preventing damage to the cable. By reducing the space occupied by the cable, it is possible to downsize the welding device. Electricity is conducted from the fixed member, the guide rod 15, to the moving member, the piston rod 16, through the current collecting member 23, which is pressed tightly against both during welding, so that there is almost no contact resistance and good resistance welding can be performed. I can do it. Furthermore, since the cooling water passage 25 is fixed, the cooling water can be reliably sent to the electrode member 17.
第８図に本考案の他の実施例を示す。図におい
て第１図に示す実施例と同一または同等部分には
同一符号を付して示し、説明を省略する。本実施
例の特徴は、第１実施例のピストンロツド１６の
鍔部１６ｂの端面に凸部１６ｄを形成した点にあ
る。 FIG. 8 shows another embodiment of the present invention. In the figures, parts that are the same or equivalent to those in the embodiment shown in FIG. A feature of this embodiment is that a convex portion 16d is formed on the end face of the flange portion 16b of the piston rod 16 of the first embodiment.
本実施例によれば、押圧部材２２がピストン１
８によつて押されたときの移動端が一定となり、
従つて集電部材２３がガイドロツド１５の外周面
を押圧する面圧が一定となる。この結果、必要以
上の押圧力を与えないためその間の接触電流密度
が一定に保たれる。 According to this embodiment, the pressing member 22 is
The moving end when pushed by 8 is constant,
Therefore, the surface pressure with which the current collecting member 23 presses against the outer peripheral surface of the guide rod 15 becomes constant. As a result, the contact current density during that time is kept constant since no more pressing force than necessary is applied.
上述したように本考案によれば、抵抗溶接ガン
に設けられた可動側電極部材に、シリンダに固定
されたガイドロツドからこのガイドロツドに摺動
自在に案内され先端に前記電極部材が装着された
ピストンロツドを介して接触抵抗をほとんどなく
して給電するようにしたので、電源から電流を供
給するケーブルの一端ハ固定部材であるガイドロ
ツドに接続され、ケーブルは溶接時にも移動する
ことがないのでケーブルの損傷の発生を防止する
ことができ、しかもケーブルの占めるスペースを
小さくすることができる。その上にピストンが電
極部材側に押圧されたときに前記集電部材が内周
部に装着されたリング状のスプリングを押し潰し
て前記ガイドロツドに密着するとともに、前記ピ
ストンロツドの鍔部にも密着するため電極部材へ
の電圧が低下することがなく、大電流が供給で
き、さらに前記ピストンへの押圧力を解除すれば
瞬時に弾性部材が伸長し、そのために瞬時にリン
グ状スピリングが膨張してガイドロツドと集電部
材とを離間させて電極部材への通電を遮断できる
から極めて安全である。
As described above, according to the present invention, the movable electrode member provided on the resistance welding gun includes a piston rod which is slidably guided from a guide rod fixed to a cylinder and has the electrode member attached to its tip. Since power is supplied through the cable with almost no contact resistance, one end of the cable that supplies current from the power supply is connected to the guide rod, which is a fixed member, and the cable does not move during welding, so there is no chance of damage to the cable. In addition, the space occupied by the cable can be reduced. Moreover, when the piston is pressed toward the electrode member, the current collecting member crushes a ring-shaped spring attached to the inner circumference and comes into close contact with the guide rod, and also comes into close contact with the flange of the piston rod. Therefore, the voltage to the electrode member does not drop and a large current can be supplied.Furthermore, when the pressing force on the piston is released, the elastic member instantly expands, which causes the ring-shaped spiral to expand instantly and the guide rod. It is extremely safe because the electricity to the electrode member can be cut off by separating the electrode member and the current collecting member.
また、固定された冷却水通路を介して電極部材
に確実に冷却水を送ることができるので、良好な
抵抗溶接を行なうことができる。 Further, since cooling water can be reliably sent to the electrode member through the fixed cooling water passage, good resistance welding can be performed.
第１図は本考案に係る抵抗溶接用ガンの一実施
例を示す縦断面図、第２図は第１図のピストンを
示す部分拡大縦断面図、第３図及び第５図はそれ
ぞれ第２図の押圧部材及び集電部材を示す部分断
面側面図、第４図及び第６図はそれぞれ第３図及
び第５図の正面図、第７図は第１図の溶接時の状
態を示す部分縦断面図、第８図は本考案の他の実
施例を示す部分縦断面図、第９図は従来の抵抗溶
接用ガンを示す正面図である。
１１……シリンダ、１５……ガイドロツド、１
６……ピストンロツド、１７……電極部材、１８
……ピストン、２１……弾性部材、２２……押圧
部材、２３……集電部材、２２ｂ，２３ｂ……テ
ーパ面、２５……冷却水通路、２７……冷却パイ
プ。
FIG. 1 is a vertical cross-sectional view showing an embodiment of the resistance welding gun according to the present invention, FIG. 2 is a partially enlarged vertical cross-sectional view showing the piston of FIG. 1, and FIGS. 4 and 6 are front views of FIGS. 3 and 5, respectively, and FIG. 7 is a portion showing the welded state of FIG. 1. FIG. 8 is a partial longitudinal sectional view showing another embodiment of the present invention, and FIG. 9 is a front view showing a conventional resistance welding gun. 11...Cylinder, 15...Guide rod, 1
6... Piston rod, 17... Electrode member, 18
... Piston, 21 ... Elastic member, 22 ... Pressing member, 23 ... Current collecting member, 22b, 23b ... Tapered surface, 25 ... Cooling water passage, 27 ... Cooling pipe.
Claims (1)
ピストンロツドと、該ピストンロツドの前記シ
リンダから突出した一端に固着されて前後進す
る電極部材とからなり、前記ピストンロツドの
少なくとも一部を絶縁処理された管状に形成
し、該管状部内にピストンロツドの内周面と摺
動自在に嵌合し、かつ一端が前記シリンダに支
持されたガイドロツドを設け、前記ピストンロ
ツドの電極部材が固着された端部と反対側の一
端に軸方向に一定範囲内で移動可能な絶縁部材
からなるピストンを装着してなる抵抗溶接用ガ
ンにおいて、前記ピストンの内周面でピストン
ロツドの鍔部とピストンの底部との間にリング
状の弾性部材を装着し、該弾性部材の内径内に
は相互にテーパ面を介して係合するリング状の
絶縁部材からなる押圧部材とリング状の集電部
材とを装着し、さらに該集電部材の内周部にリ
ング状のスプリングを装着し、前記ピストンが
電極部材側に押圧されたときに前記集電部材が
内周部に装着されたリング状のスプリングを押
し潰して前記ガイドロツドに密着するととも
に、前記ピストンロツドの鍔部にも密着するよ
うにしたことを特徴とする抵抗溶接用ガン。 (2) ガイドロツド内には軸方向に冷却水通路が形
成され、該冷却水通路には一端がピストンロツ
ドの電極部材装着部に開口固定された冷却パイ
プが摺動自在に装着されたことを特徴とする実
用新案登録請求の範囲第１項記載の抵抗溶接用
ガン。[Claims for Utility Model Registration] (1) A piston rod that is composed of a piston rod that moves within a cylinder by the pressurizing force of a fluid, and an electrode member that is fixed to one end of the piston rod that protrudes from the cylinder and moves back and forth; at least a portion of the guide rod is formed into an insulated tubular shape, and a guide rod is provided in the tubular portion to be slidably fitted to the inner circumferential surface of the piston rod and whose one end is supported by the cylinder, and an electrode member of the piston rod is provided. In a resistance welding gun, which is equipped with a piston made of an insulating member that is movable within a certain range in the axial direction at one end opposite to the end to which the A ring-shaped elastic member is installed between the bottom of the piston and the inner diameter of the elastic member includes a pressing member made of a ring-shaped insulating member and a ring-shaped current collecting member that engage with each other via a tapered surface. A ring-shaped spring is attached to the inner circumference of the current collecting member, and when the piston is pressed toward the electrode member, the ring-shaped spring attached to the inner circumference of the current collecting member is A resistance welding gun characterized in that the spring is compressed so that it comes into close contact with the guide rod and also with the flange of the piston rod. (2) A cooling water passage is formed in the axial direction within the guide rod, and a cooling pipe having one end opened and fixed to the electrode member mounting portion of the piston rod is slidably attached to the cooling water passage. A resistance welding gun according to claim 1 of the utility model registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168839U JPH0527266Y2 (en) | 1987-11-04 | 1987-11-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168839U JPH0527266Y2 (en) | 1987-11-04 | 1987-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0172985U JPH0172985U (en) | 1989-05-17 |
| JPH0527266Y2 true JPH0527266Y2 (en) | 1993-07-12 |
Family
ID=31458367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987168839U Expired - Lifetime JPH0527266Y2 (en) | 1987-11-04 | 1987-11-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527266Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011110585A (en) * | 2009-11-27 | 2011-06-09 | Koyo Giken:Kk | Power supply system of spot welding machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS628943U (en) * | 1985-07-01 | 1987-01-20 |
-
1987
- 1987-11-04 JP JP1987168839U patent/JPH0527266Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS628943U (en) * | 1985-07-01 | 1987-01-20 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011110585A (en) * | 2009-11-27 | 2011-06-09 | Koyo Giken:Kk | Power supply system of spot welding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0172985U (en) | 1989-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3469070A (en) | Arc welding gun | |
| US3576423A (en) | Arc welding gun | |
| CN101646523B (en) | Self-adjusting liner assembly for welding torch | |
| US3142746A (en) | Consumable electrode arc welding apparatus | |
| JPH0527266Y2 (en) | ||
| CN212599601U (en) | Flash butt welding machine | |
| US3321607A (en) | Automatic feed resistance welding gun | |
| US4329559A (en) | Resistance welder | |
| KR101245429B1 (en) | Stud welding gun | |
| JPS6268684A (en) | Feeding unit for welding current | |
| JPS628943Y2 (en) | ||
| CA1316225C (en) | Brazing tongs | |
| JP4284928B2 (en) | Resistance welding machine | |
| JP5105205B2 (en) | Power supply device for spot welder | |
| JPS6325025Y2 (en) | ||
| JPS6229193Y2 (en) | ||
| EP0146167A1 (en) | Pneumatically operating device comprising means for limiting the displacement of a piston | |
| JPS628942Y2 (en) | ||
| JPS5856068Y2 (en) | Axial feed cylinder | |
| CN219805520U (en) | Electrode cooling mechanism | |
| US20050121419A1 (en) | System and method for securing a welding electrode to a welding torch | |
| JPH08318376A (en) | Stud welding machine | |
| JPS62275583A (en) | Cylinder gun for spot welding | |
| US20220355411A1 (en) | Electric Connector Engaging a Welder to a Spot Welding Tool | |
| US2293337A (en) | Welding apparatus |