JPH0731894Y2 - Gun arm device for resistance welding gun - Google Patents
Gun arm device for resistance welding gunInfo
- Publication number
- JPH0731894Y2 JPH0731894Y2 JP503190U JP503190U JPH0731894Y2 JP H0731894 Y2 JPH0731894 Y2 JP H0731894Y2 JP 503190 U JP503190 U JP 503190U JP 503190 U JP503190 U JP 503190U JP H0731894 Y2 JPH0731894 Y2 JP H0731894Y2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- gun
- main body
- holder
- tip holder
- 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
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、主としてアルミ板等をスポット溶接する加圧
力の大きな抵抗溶接ガンのガンアーム装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates mainly to a gun arm device for a resistance welding gun for spot welding an aluminum plate or the like with a large pressing force.
（従来の技術） 従来、実開昭62-8936号公報により、１対の横板と該両
横板を連結する縦板とから成る断面工形のガンアーム本
体の先端部にチップホルダと、該本体の縦板の側面に該
チップホルダに接続する導体とを設けた抵抗溶接ガンの
ガンアーム装置は知られ、このものでは該本体の先端に
該チップホルダを溶接すると共に、該チップホルダの周
面に該導体の端面を突き当ててこれをろう付けするよう
にしている。(Prior Art) Conventionally, according to Japanese Utility Model Laid-Open No. 62-8936, a tip holder and a tip holder are provided at the tip of a gun arm main body having a cross-section formed of a pair of horizontal plates and a vertical plate connecting the horizontal plates. A gun arm device of a resistance welding gun in which a conductor for connecting to the tip holder is provided on the side surface of a vertical plate of the main body is known. In this, the tip holder is welded to the tip of the main body, and the peripheral surface of the tip holder is also known. The end surface of the conductor is abutted against and brazed.
（考案が解決しようとする課題） ところでアルミ板等をスポット溶接する場合、電極チッ
プに大電流を通電して大きな加圧力で圧着する必要があ
り、上記した従来のものでは、ガンアーム本体の曲げ剛
性を高めても、チップホルダを該本体の先端部に溶接す
るため接合部に大きなせん断応力や剥離応力が作用し、
亀裂を生じることがあり、またチップホルダの周面に導
体の端面を突き当ててろう付けするため、接触面積が左
程大きくなく電力ロスを生じ勝ちとなる。(Problems to be solved by the invention) By the way, when spot welding an aluminum plate or the like, it is necessary to apply a large current to the electrode tip and crimp it with a large pressurizing force. Even if the height is increased, since the tip holder is welded to the tip of the main body, a large shear stress or peeling stress acts on the joint,
Since cracks may occur and the end surface of the conductor is abutted and brazed against the peripheral surface of the chip holder, the contact area is not as large as on the left and power loss tends to occur.
本考案は、かかる問題点に鑑みてなされたものであり、
その目的とするところは、チップホルダの取付剛性が高
く且つ電力ロスを低減した装置を提供することにある。The present invention has been made in view of such problems,
It is an object of the invention to provide a device in which the mounting rigidity of the chip holder is high and the power loss is reduced.
（課題を解決するための手段） 上記目的を達成すべく、請求項１の考案では、１対の横
板と該両横板を連結する縦板とから成る断面Ｉ形のガン
アーム本体の先端部にチップホルダと、該本体の縦板の
側面に該チップホルダに接続する導体とを設けるものに
おいて、該本体の先端の縦板を切除すると共に、該本体
の先端の両横板に透孔を設け、該チップホルダに段部を
形成し、該チップホルダを該両透孔に挿通して該チップ
ホルダをその端部外周に刻設したねじ部に螺合するナッ
トにより該本体に締付固定し、さらに前記導体を該本体
の縦板の両側面に１対に設け、該両導体の先端部をボル
トにより該チップホルダの該両横板の間の外周部分を狭
むように締付けた。(Means for Solving the Problems) In order to achieve the above object, in the invention of claim 1, a tip end portion of a gun arm body having a cross section of I-shape, which comprises a pair of horizontal plates and a vertical plate connecting the both horizontal plates. In which a chip holder and a conductor for connecting to the chip holder are provided on the side surface of the vertical plate of the main body, the vertical plate at the tip of the main body is cut off, and through holes are formed in both horizontal plates at the front end of the main body. A step portion is formed on the tip holder, the tip holder is inserted into both through holes, and the tip holder is tightened and fixed to the main body by a nut screwed into a thread portion engraved on the outer periphery of the end portion. Further, the conductors were provided in a pair on both side surfaces of the vertical plate of the main body, and the tips of the conductors were tightened by bolts so as to narrow the outer peripheral portion between the horizontal plates of the chip holder.
（作用） 両横板の透孔にチップホルダを挿通してチップホルダの
ねじ部に螺合するナットでチップホルダをガンアーム本
体に締付けることにより、チップホルダが両横板に比較
的長いスパンで支持されるためチップホルダの取付剛性
が高まる。(Function) Insert the chip holder into the through holes of both horizontal plates and tighten the chip holder to the gun arm body with the nut that is screwed into the screw part of the chip holder, so that the chip holder is supported on both horizontal plates with a relatively long span. Therefore, the mounting rigidity of the chip holder is increased.
また、１対の導体をボルトによりチップホルダの両横板
の間の外周部分を狭むように締付けるため、導体をチッ
プホルダに広い面で確実に接触でき、電力ロスを低減で
きる。Further, since the pair of conductors are tightened with bolts so as to narrow the outer peripheral portion between both lateral plates of the chip holder, the conductors can surely come into contact with the chip holder on a wide surface, and power loss can be reduced.
また、チップホルダや導体は比較的高温になるため、チ
ップホルダと導体とに夫々水通路を穿設し、これらを水
冷するが、導体の水通路の下流側に直列にチップホルダ
の水通路を接続するのでは、導体で熱交換された冷却水
がチップホルダの水通路に導入され、チップホルダの冷
却効率が低下し勝ちとなる。しかし、請求項２の考案の
如く、前記チップホルダと前記両導体を該チップホルダ
と該各導体とに夫々穿設した水通路を介して別々に冷却
することで上記不具合を解決できる。Further, since the tip holder and the conductor become relatively hot, water paths are formed in the tip holder and the conductor respectively, and these are water-cooled, but the water path of the tip holder is connected in series on the downstream side of the water path of the conductor. When connecting, the cooling water that has undergone heat exchange with the conductor is introduced into the water passage of the chip holder, and the cooling efficiency of the chip holder is likely to decrease. However, the above problem can be solved by separately cooling the tip holder and the both conductors through the water passages formed in the tip holder and the respective conductors as in the invention of claim 2.
（実施例） 図面で（１）は１対のガンアームを有する抵抗溶接ガン
を示し、該各ガンアームは、１対の横板（2a）（2b）と
該両横板（2a）（2b）を連結する縦板（2c）とから成る
断面Ｉ形のガンアーム本体（２）の先端に電極チップ
（３）を保持するチップホルダ（４）を設けて成り、該
各ガンアーム本体（２）の縦板（2c）の両側面に、チッ
プホルダ（４）に接続する銅製の導体（５）（５）を絶
縁材（６）を介してボルト止めし、ガンブラケット
（７）に該両ガンアームを支軸（８）を介して枢支する
と共に、一方のガンアームの尾端部に取付けたエアシリ
ンダ（９）のピストンロッドを他方のガンアームの尾端
部にリンク（10）を介して連結した。そして、ガンブラ
ケット（７）に搭載したトランス（11）の各出力端子に
接続される導体（12）と前記各導体（５）とをオンス導
板（13）を介して接続し、前記抵抗溶接ガン（１）をエ
アシリンダ（９）の作動により両ガンアームが開閉され
るＸ型に構成した。(Embodiment) In the drawings, (1) shows a resistance welding gun having a pair of gun arms, each gun arm comprising a pair of lateral plates (2a) (2b) and both lateral plates (2a) (2b). A vertical arm plate of each gun arm body (2) is provided by providing a tip holder (4) holding an electrode tip (3) at the tip of a gun arm body (2) having an I-shaped cross section, which is composed of a vertical plate (2c) to be connected. Copper conductors (5) and (5) connected to the tip holder (4) are bolted to both sides of (2c) through an insulating material (6), and the gun bracket (7) is supported by both the gun arms. While being pivotally supported via (8), the piston rod of the air cylinder (9) attached to the tail end of one gun arm was connected to the tail end of the other gun arm via a link (10). Then, the conductor (12) connected to each output terminal of the transformer (11) mounted on the gun bracket (7) and each conductor (5) are connected via an ounce conducting plate (13), and the resistance welding is performed. The gun (1) is constructed as an X type in which both gun arms are opened and closed by the operation of the air cylinder (9).
図面で（14）はエアシリンダ（９）の縮み作動時に上側
のガンアームが当接するストッパー、（2d）は各ガンア
ーム本体（２）の縦板（2c）に設けた軽量化のための肉
抜孔を示す。In the drawing, (14) is a stopper with which the upper gun arm comes into contact when the air cylinder (9) contracts, and (2d) is a lightening hole provided in the vertical plate (2c) of each gun arm body (2) for weight reduction. Show.
前記各チップホルダ（４）には段部たるフランジ部（4
a）が設けられており、前記各ガンアーム本体（２）の
先端の縦板（2c）を切除すると共に、該本体（２）の先
端の横板（2a）（2b）に透孔（15）（15）を設け、さら
に上側のガンアーム本体（２）先端の下側の横板（2b）
下面に短スリーブ（2e）と、下側のガンアーム本体
（２）先端の上側の横板（2b）上面に長スリーブ（2f）
とを夫々溶接し、該各チップホルダ（４）を該各本体
（２）の両透孔（15）（15）に絶縁材（16）を介して挿
通して、該各チップホルダ（４）をその端部外周に刻設
したねじ部（4b）に螺合するナット（17）により該各本
体（２）に締付け固定した。Each tip holder (4) has a flange (4
a) is provided, the vertical plate (2c) at the tip of each gun arm body (2) is cut off, and the through holes (15) are formed in the horizontal plates (2a) (2b) at the tip of the body (2). (15) is provided, and the horizontal plate (2b) on the lower side of the tip of the gun arm body (2) on the upper side
A short sleeve (2e) on the lower surface and an upper horizontal plate (2b) at the tip of the lower gun arm body (2), and a long sleeve (2f) on the upper surface.
Are welded to each other, and the respective chip holders (4) are inserted into both through holes (15) (15) of the respective main body (2) through an insulating material (16), and the respective chip holders (4). Was fastened and fixed to each main body (2) by a nut (17) screwed to a screw portion (4b) engraved on the outer circumference of the end portion.
そして、前記各１対の導体（５）（５）の先端にチップ
ホルダ（４）の周面形状に合致する凹部（5a）を設け、
該両導体（５）（５）をボルト（18）により各チップホ
ルダ（４）の両横板（2a）（2b）の間の外周部分を両側
から狭むように締付けた。And, a recess (5a) conforming to the peripheral surface shape of the chip holder (4) is provided at the tip of each of the pair of conductors (5) (5),
The conductors (5) and (5) were tightened with bolts (18) so that the outer peripheral portion between the lateral plates (2a) and (2b) of each chip holder (4) was narrowed from both sides.
尚、下側のガンアーム本体（２）の長スリーブ（2f）は
リブ（2g）により補強するようにした。The long sleeve (2f) of the lower gun arm body (2) was reinforced by ribs (2g).
また、各チップホルダ（４）には先端のチップ（３）に
達する孔（19）が設けられており、該孔（19）に小径の
パイプ（20）を挿入して内外２重の水通路（21）を形成
し、前記両導体（５）（５）の先端に夫々窓（5b）を設
け、該チップホルダ（４）の外周に該パイプ（20）に連
通する流入口（22）と該孔（19）に連通する流出口（2
3）とを設け、該流入口（22）と該流出口（23）とに夫
々ホース接続用のソケット（24）を該各窓（5b）を通し
て固着した。Further, each tip holder (4) is provided with a hole (19) reaching the tip (3) of the tip, and a small diameter pipe (20) is inserted into the hole (19) to form a double water passage inside and outside. (21) is formed, a window (5b) is provided at the tip of each of the conductors (5), (5), and an inlet (22) communicating with the pipe (20) is provided on the outer periphery of the tip holder (4). Outlet (2 that communicates with the hole (19)
3) are provided, and sockets (24) for hose connection are fixed to the inflow port (22) and the outflow port (23) through the windows (5b).
また各ガンアームの両導体（５）（５）には夫々水通路
（28）が穿設されており、該各導体（５）の水通路（2
8）と、前記各チップホルダ（４）の水通路（23）とを
給水源（26）に夫々各別のホース（25）を介して接続
し、各チップホルダ（４）と各導体（５）とを別々に水
冷し得るようにした。Further, water conductors (5) and (5) of each gun arm are provided with water passages (28) respectively, and the water passages (2) of the conductors (5) are formed.
8) and the water passageway (23) of each of the tip holders (4) are connected to the water supply source (26) via respective hoses (25), and each tip holder (4) and each conductor (5) are connected. ) And can be separately water cooled.
図示のものでは、各導体（５）の端部に前記オンス導板
（13）を接続する押えプレート（26）、トランス（11）
の出力端子に接続した前記導体（13）及び該導体（13）
に該オンス導板を接続する押えプレート（27）に図示し
ないが夫々水通路を穿設して、これら押えプレート（2
6）（27）や導体（13）も水冷し得るようにした。In the illustrated example, a holding plate (26) for connecting the ounce conducting plate (13) to the end of each conductor (5), a transformer (11).
And the conductor (13) connected to the output terminal of the
Although not shown, a water passage is formed in each of the holding plates (27) for connecting the ounce guide plate to the holding plates (2).
6) (27) and conductor (13) are also water cooled.
尚、チップホルダ（４）に接続する導体（５）をガンア
ームの強度部材に構成した場合、該導体（５）を曲げ強
度の高い銅合金製とするが、この場合、導体の伝導率が
悪く電力ロス分を加味した容量の大きなトランスが必要
になる。しかし、上記実施例のように、導体（５）を銅
製とし、ガンアーム本体（２）のみを強度部材に構成し
た場合、小型のトランスを用いることができ有利であ
る。When the conductor (5) connected to the tip holder (4) is configured as a strength member of the gun arm, the conductor (5) is made of a copper alloy having high bending strength, but in this case, the conductivity of the conductor is poor. A transformer with a large capacity that takes into account the power loss is required. However, as in the above embodiment, when the conductor (5) is made of copper and only the gun arm main body (2) is configured as the strength member, a small transformer can be used, which is advantageous.
また、ガンアーム本体（２）をＩ形としたが、これに限
るものではなく、ガンアーム本体を１対の横板と該両横
板を連結する左右１対の縦板とを有する断面矩形とし、
ガンアーム本体の先端の両縦板を切除すると共に、該本
体の先端部の両横板に透孔を設け、チップホルダ（４）
を該両透孔に挿通して該チップホルダ（４）をその端部
外周のナット（17）により該本体に締付け、該本体の内
部空間に配設した導体を該チップホルダ（４）に接続す
ることも可能である。Although the gun arm body (2) is I-shaped, the gun arm body is not limited to this, and the gun arm body has a rectangular cross section having a pair of horizontal plates and a pair of left and right vertical plates connecting the horizontal plates.
Both vertical plates at the tip of the gun arm main body are cut off, and through holes are provided in both horizontal plates at the front end of the main body, and a tip holder (4) is formed.
Through the both through holes and tighten the chip holder (4) to the main body with a nut (17) on the outer periphery of the end, and connect the conductor arranged in the internal space of the main body to the chip holder (4). It is also possible to do so.
（考案の効果） 以上のように請求項１の考案によれば、チップホルダを
ガンアームの先端にチップポルダを剛性高く取付けるこ
とができ、また請求項２の考案によれば、チップホルダ
や導体を効率良く冷却できる効果を有する。(Effect of the Invention) As described above, according to the invention of claim 1, the tip holder can be attached to the tip of the gun arm with high rigidity, and according to the invention of claim 2, the tip holder and the conductor can be efficiently mounted. It has the effect of cooling well.
第１図は本考案装置を具備するＸ型の抵抗溶接ガンの側
面図、第２図はその平面図、第３図は上側ガンアームの
要部の拡大截断側面図、第４図は第３図のIV-IV線截断
平面図、第５図は第１図のV-V線拡大截断面図である。 （２）ガンアーム本体 （2a）（2b）……横板 （2c）……縦板 （４）……チップホルダ （4a）……フランジ部（段部） （4b）……ねじ部 （５）（５）……導体 （15）……透孔 （17）……ナット （18）……導体を締付けるボルト （21）（24）……水通路FIG. 1 is a side view of an X-type resistance welding gun equipped with the device of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an enlarged cutaway side view of an essential part of an upper gun arm, and FIG. 4 is FIG. IV-IV line sectional plan view of FIG. 5, FIG. 5 is an enlarged sectional view taken along line VV of FIG. (2) Gun arm body (2a) (2b) …… Horizontal plate (2c) …… Vertical plate (4) …… Tip holder (4a) …… Flange (step) (4b) …… Screw (5) (5) ...... Conductor (15) ...... Through hole (17) ...... Nut (18) ...... Bolts for tightening the conductor (21) (24) ...... Water passage
Claims (2)
ら成る断面Ｉ形のガンアーム本体の先端部にチップホル
ダと、該本体の縦板の側面に該チップホルダに接続する
導体とを設けるものにおいて、該本体の先端の縦板を切
除すると共に、該本体の先端の両横板に透孔を設け、該
チップホルダに段部を形成し、該チップホルダを該両透
孔に挿通して該チップホルダをその端部外周に刻設した
ねじ部に螺合するナットにより該本体に締付固定し、さ
らに前記導体を該本体の縦板の両側面に１対に設け、該
両導体の先端部をボルトにより該チップホルダの該両横
板の間の外周部分を狭むように締付けたことを特徴とす
る抵抗溶接ガンのガンアーム装置。1. A tip holder of a gun arm main body having a cross-sectional I-shape, which comprises a pair of horizontal plates and a vertical plate connecting the horizontal plates, and a tip holder connected to a side surface of the vertical plate of the main body. And a conductor is provided, the vertical plate at the tip of the main body is cut off, through holes are provided in both horizontal plates at the tip of the main body, a step is formed in the chip holder, and the chip holder is The tip holder is inserted into the through hole, and the tip holder is tightened and fixed to the main body by a nut screwed into a threaded portion engraved on the outer periphery of the end portion, and the conductors are paired on both side surfaces of the vertical plate of the main body. A gun arm device for a resistance welding gun, wherein the tip ends of the conductors are tightened with bolts so as to narrow an outer peripheral portion between the lateral plates of the tip holder.
ホルダと該各導体とに夫々穿設した水通路を介して別々
に冷却するようにしたことを特徴とする請求項１記載の
抵抗溶接ガンのガンアーム装置。2. The resistance welding according to claim 1, wherein the tip holder and the both conductors are separately cooled through water passages formed in the tip holder and the conductors, respectively. Gun arm device for gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP503190U JPH0731894Y2 (en) | 1990-01-25 | 1990-01-25 | Gun arm device for resistance welding gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP503190U JPH0731894Y2 (en) | 1990-01-25 | 1990-01-25 | Gun arm device for resistance welding gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03101373U JPH03101373U (en) | 1991-10-22 |
| JPH0731894Y2 true JPH0731894Y2 (en) | 1995-07-26 |
Family
ID=31508754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP503190U Expired - Lifetime JPH0731894Y2 (en) | 1990-01-25 | 1990-01-25 | Gun arm device for resistance welding gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0731894Y2 (en) |
-
1990
- 1990-01-25 JP JP503190U patent/JPH0731894Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03101373U (en) | 1991-10-22 |
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Legal Events
| Date | Code | Title | Description |
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| EXPY | Cancellation because of completion of term |