JP2940848B2 - Electrode tip detachment detection device for welding gun - Google Patents

Electrode tip detachment detection device for welding gun

Info

Publication number
JP2940848B2
JP2940848B2 JP1655394A JP1655394A JP2940848B2 JP 2940848 B2 JP2940848 B2 JP 2940848B2 JP 1655394 A JP1655394 A JP 1655394A JP 1655394 A JP1655394 A JP 1655394A JP 2940848 B2 JP2940848 B2 JP 2940848B2
Authority
JP
Japan
Prior art keywords
electrode tip
compressed air
air
welding gun
pressure
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 - Fee Related
Application number
JP1655394A
Other languages
Japanese (ja)
Other versions
JPH07223079A (en
Inventor
正利 忍田
浩司 広瀬
英雄 矢口
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.)
NITSUSAN DEIIZERU KOGYO KK
Original Assignee
NITSUSAN DEIIZERU KOGYO KK
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 NITSUSAN DEIIZERU KOGYO KK filed Critical NITSUSAN DEIIZERU KOGYO KK
Priority to JP1655394A priority Critical patent/JP2940848B2/en
Publication of JPH07223079A publication Critical patent/JPH07223079A/en
Application granted granted Critical
Publication of JP2940848B2 publication Critical patent/JP2940848B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、自動車等の車体組立ラ
イン等において、2つの部材をスポット溶接する溶接ガ
ンの溶接用の電極チップの離脱を感知して、これを報知
したり、溶接ガンの溶接動作を停止させるための溶接ガ
ンの電極チップ離脱検知装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the detection of a detachment of a welding electrode tip of a welding gun for spot welding two members in a vehicle body assembly line of an automobile or the like, and reports the detachment. The present invention relates to an electrode tip detachment detecting device for a welding gun for stopping a welding operation of a welding gun.

【0002】[0002]

【従来の技術】従来、スポット溶接を行う際に、被溶接
部材に電極チップが溶着して、溶接ガンの装着部から電
極チップが離脱すると、電極と溶接される部材との接触
不良や電極チップがないことによる溶接不良を発生し、
製品の品質上に問題を生じていた。
2. Description of the Related Art Conventionally, in performing spot welding, when an electrode tip is welded to a member to be welded and the electrode tip is detached from a mounting portion of a welding gun, poor contact between the electrode and a member to be welded or an electrode tip is formed. Welding failure due to lack of
There was a problem with the quality of the product.

【0003】特にラインとして形成された車体溶接工程
等においては、使用されている溶接ガンの電極チップが
被溶接部材に溶着すると、溶接部材に電極チップが残留
したまま次の工程に移動するので、次の工程で溶接され
る溶接部材との干渉等の障害が発生し、部材の損傷や溶
接機の破損等の問題を生ずる。
In particular, in a vehicle body welding process or the like formed as a line, when an electrode tip of a welding gun used is welded to a member to be welded, the electrode tip moves to the next step with the electrode tip remaining on the welding member. An obstacle such as interference with a welding member to be welded in the next step occurs, causing problems such as damage to the member and damage to the welding machine.

【0004】この問題を解消するために、電極チップの
離脱を検知するための手段として、実開昭62−158
74号公開公報に記載されたスポット溶接機の電極チッ
プ脱落検出装置、実開昭62−105771号公開公報
に記載された溶接ガンの電極チップ離脱検知装置が知ら
れている。
In order to solve this problem, Japanese Utility Model Application Laid-Open No. 62-158 discloses a means for detecting detachment of an electrode tip.
An electrode tip detachment detecting device of a spot welding machine described in Japanese Patent Publication No. 74, and an electrode tip detachment detecting device of a welding gun described in Japanese Utility Model Laid-Open Publication No. 62-105771 are known.

【0005】前者は、電極の脱落が発生した際に、ガン
アームと電極ホルダとの対向部にある被溶接部材に絶縁
間隙を介在させて通電不良を発生させて、これを通電不
良検出装置で検出するものである。
[0005] In the former, when an electrode falls off, an energization failure is generated by interposing an insulating gap between the members to be welded at the opposing portion of the gun arm and the electrode holder, and this is detected by an energization failure detection device. Is what you do.

【0006】又、後者はガン本体と電極チップとに跨が
って構成される電極チップの離脱運動に応動して切換る
スイッチング手段で、電極チップの離脱を検知するもの
である。
The latter is a switching means for switching in response to the detachment movement of the electrode tip formed over the gun body and the electrode tip, and detects the detachment of the electrode tip.

【0007】[0007]

【発明が解決しようとする課題】このような溶接ガンの
電極チップ離脱検知装置においては、電極チップが完全
に抜け落ちず、電極チップが装着部に抜けかかった不完
全な装着状態で残ってしまうことがあると、通電不良の
発生の検知やスイッチング手段の切換えが確実に行われ
難くなってしまう。
In such a device for detecting the detachment of an electrode tip of a welding gun, the electrode tip does not come off completely, and the electrode tip remains in an incompletely attached state in which it comes off to the attachment portion. In such a case, it becomes difficult to reliably detect the occurrence of the energization failure and to switch the switching means.

【0008】そのために、検知装置としての動作の確実
性が足りず、ラインとしての溶接ガンにおける電極チッ
プ離脱検知装置としては信頼性に欠け、ラインが動作を
し続けて次工程の溶接ガンの損傷を来すことがある。
For this reason, the reliability of the operation as a detecting device is insufficient, and the reliability of the electrode tip detachment detecting device in a welding gun as a line is lacking. May come.

【0009】又、製品に対する品質の保証、特に信頼性
に大きな問題を生ずる危険性があると共に、装置の構造
も複雑になり、設備費用も高価になってしまう問題点も
あった。
In addition, there is a risk that the quality assurance of the product, especially the reliability, may be serious, and the structure of the apparatus is complicated, and the equipment cost is high.

【0010】本発明は、従来の溶接ガンの電極チップ離
脱検知装置における前述の問題点を解決して、溶接ガン
の電極チップの離脱を確実に、且つ速やかに検知して、
次の工程の溶接ガンに対する障害や、製品品質に対する
保証と信頼性の確保を廉価な設備費用で行うことを目的
とする。
The present invention solves the above-mentioned problems in the conventional welding gun electrode tip detachment detection device, and reliably and promptly detects detachment of the welding gun electrode tip.
The purpose is to ensure the reliability and reliability of product quality in the next process with welding guns at low cost.

【0011】[0011]

【課題を解決するための手段】本発明は、前述の目的を
達成するための溶接ガンの電極チップ離脱検知装置の構
成は、溶接ガンのガン本体の先端部に設けられた電極チ
ップを着脱可能に冠着できる各装着部と、該装着部に通
ずる空気通路及び両空気通路を連通させた連通管と、前
記空気通路に一定圧で、供給流量が制限されている圧縮
空気を充填する圧縮空気充填手段と、前記圧縮空気充填
手段に前記圧縮空気を供給するとともに、前記ガン本体
に設けられた前記各装着部の前記電極チップを相互に接
触・押圧させるエアシリンダに前記圧縮空気を供給する
圧縮空気タンクと、前記電極チップが離脱した際の空気
通路の圧縮空気圧の減圧を検知する減圧検知手段と、該
減圧検知手段による減圧の検知信号が入力される制御手
段とを備えたことを特徴とする。
According to the present invention, there is provided an electrode tip detachment detecting device for a welding gun for achieving the above-mentioned object, wherein an electrode tip provided at a tip end of a gun body of the welding gun is detachable. Mounting portions that can be fitted to the mounting portion, an air passage communicating with the mounting portion, and a communication pipe that connects the two air passages; and compressed air that fills the air passage with a constant pressure and compressed air whose supply flow rate is restricted. Filling means and the compressed air filling
Means for supplying said compressed air to said means and said gun body
The electrode tips of the mounting portions provided in
Supply the compressed air to the air cylinder to be touched and pressed
A compressed air tank; reduced pressure detecting means for detecting reduced pressure of compressed air in the air passage when the electrode tip is detached; and control means for receiving a reduced pressure detection signal from the reduced pressure detecting means. And

【0012】[0012]

【作用】本発明の溶接ガンの電極チップ離脱検知装置
は、各電極チップの装着部が空気通路で連通しているの
で、電極チップの離脱による急減圧となるときは勿論、
離脱しかかった状態での少量の空気の漏洩による減圧時
でも、圧縮空気の供給流量が制限されているので圧縮空
気の供給が遅れ、減圧が促進される。
According to the electrode tip detachment detecting device of the welding gun of the present invention, since the mounting portion of each electrode tip is communicated with the air passage, when the electrode tip is detached, the pressure drop is of course caused.
Even at the time of decompression due to a small amount of air leaking in the state of being separated, the supply flow rate of the compressed air is limited, so that the supply of the compressed air is delayed and the decompression is promoted.

【0013】そのために、急減圧時に近い時間で直接に
減圧として減圧検知手段を動作させることができ、速や
かに電極チップの離脱を確実に検知することができるも
のである。
For this reason, the pressure reduction detecting means can be operated as the pressure reduction directly in a time close to the time of the rapid pressure reduction, and the detachment of the electrode tip can be detected promptly and reliably.

【0014】[0014]

【実施例】次に、本発明の実施の一例を、図面について
以下に説明する。この実施例における溶接ガンは、図1
に示すようにそれぞれ先端に電極チップ1を装着できる
装着部2を設けた2本のアーム3が中央付近で支軸4に
より上下に回動自在に枢着されている。
Next, an embodiment of the present invention will be described below with reference to the drawings. The welding gun in this embodiment is shown in FIG.
As shown in FIG. 2, two arms 3 each provided with a mounting portion 2 to which the electrode tip 1 can be mounted at the tip are pivotally mounted on a support shaft 4 near the center so as to be rotatable up and down.

【0015】このアーム3の基端には、この基端を押し
て各先端の装着部2に装着されている電極チップ1を接
触、押圧させるエアシリンダ5が取り付けられ、このエ
アシリンダ5に圧縮空気を導入することによって、図
2,図3で示す電極チップ1間に位置する2枚の被溶接
部材6を挟み込むと共に、電極チップ1間に電流を流
し、被溶接部材6の電気抵抗の発熱で、被溶接部材6の
スポット溶接を行うものである。
An air cylinder 5 is attached to the base end of the arm 3 to press the base end to contact and press the electrode tip 1 mounted on the mounting portion 2 at each end. 2 and 3, the two welded members 6 located between the electrode tips 1 shown in FIGS. 2 and 3 are sandwiched, and a current flows between the electrode tips 1 to generate heat due to the electric resistance of the welded members 6. And spot welding of the member 6 to be welded.

【0016】この各アーム3には、それぞれに設けた接
続口7a、7bから、電極チップ1の装着部2に連通す
る圧縮空気の空気通路8を形成する。そして、一方のア
ーム3の接続口7aには、圧縮空気タンク9からの圧縮
空気の供給、遮断を行う手動の開閉バルブ10、圧縮空
気の圧力を一定(例えば設定圧力2kg/cm2 )に保
つ圧力調整バルブ11、圧縮空気の流量を一定に制限す
る流量制御バルブ12、電極チップ1の離脱に伴って遮
断する電磁バルブ13を介して、圧縮空気タンク9が接
続されている。
Each of the arms 3 has an air passage 8 for compressed air which communicates with the mounting portion 2 of the electrode chip 1 from the connection ports 7a and 7b provided respectively. A manual opening / closing valve 10 for supplying and shutting off the compressed air from the compressed air tank 9 is connected to the connection port 7a of the one arm 3, and the pressure of the compressed air is kept constant (for example, a set pressure of 2 kg / cm 2 ). The compressed air tank 9 is connected via a pressure adjusting valve 11, a flow control valve 12 for limiting the flow rate of the compressed air to a constant value, and an electromagnetic valve 13 which shuts off when the electrode tip 1 is detached.

【0017】又、他方のアーム3の接続口7bには、圧
縮空気の圧力が一定圧力(例えば設定減圧1kg/cm
2 )以下になるとONする圧力スイッチ14が接続され
ており、この圧力スイッチ14に制御回路16が接続さ
れている。そして、制御回路16は、圧力スイッチ14
のON,OFFを検出すると、電磁バルブ13、後述の
離脱表示灯等に出力するようになっている。
The pressure of the compressed air is maintained at a constant pressure (for example, a set pressure of 1 kg / cm) at the connection port 7b of the other arm 3.
2 ) A pressure switch 14 that is turned on when the pressure becomes below is connected, and a control circuit 16 is connected to the pressure switch 14. The control circuit 16 controls the pressure switch 14
When ON or OFF is detected, it is output to the electromagnetic valve 13, a release indicator lamp described later, or the like.

【0018】更に、両アーム3間に圧縮空気を連通させ
るため、空気通路8間を連通させる連通管15が各アー
ム3間に設けられている。従って、この実施例において
は、溶接ガンの使用に先立って開閉バルブ10を開い
て、圧縮空気タンク9の圧縮空気を圧力調整バルブ11
で一定圧とすると共に、流量制御バルブ12で一定流量
に制限して空気通路8に導入し、空気通路8、連通管1
5、圧力スイッチ14とを一定圧力に保つ。
Further, a communication pipe 15 for communicating between the air passages 8 is provided between the arms 3 in order to communicate compressed air between the arms 3. Therefore, in this embodiment, the opening and closing valve 10 is opened before the use of the welding gun, and the compressed air in the compressed air tank 9 is supplied to the pressure adjusting valve 11.
To a constant pressure, and restrict the flow rate to a constant flow rate with a flow control valve 12 and introduce it into the air passage 8.
5. Keep the pressure switch 14 and the pressure constant.

【0019】この動作は、図5に示したフローチャート
でスタートすると、ステップS1において手動による開
閉バルブ10の開放で空気通路8内が所定供給圧力にな
るエア供給圧設定が行われる。
When this operation is started according to the flowchart shown in FIG. 5, in step S1, the air supply pressure is set to a predetermined supply pressure in the air passage 8 by manually opening the on-off valve 10.

【0020】このようなスポット溶接の準備作業を行っ
た後に、ステップS2として溶接作業がスタートするも
のであるが、この溶接作業の進行中はステップS3で圧
力スイッチ14に対する供給圧力が一定値以上にあるこ
との確認を行い続け、一定以上に保たれているNOの場
合にはステップS2に戻り、電極チップ1の離脱によっ
て、圧力スイッチ14の圧力が一定値以下に下がり、O
FFとなるまで、これを継続する。
After the preparation work for spot welding is performed, the welding work is started as step S2. During the progress of the welding work, the supply pressure to the pressure switch 14 is increased to a predetermined value or more in step S3. It is continued to confirm that there is a certain value. If NO is maintained at a certain value or more, the process returns to step S2.
This is continued until it becomes FF.

【0021】即ち、図4に示すように被溶接部材6がス
ポット溶接に際して、電極チップ1の一部が被溶接部材
6に溶着してしまうと、電極チップ1全体が、或いは一
部が装着部2から離脱し、空気通路8から圧縮空気が抜
けてしまう。
That is, as shown in FIG. 4, when a part of the electrode tip 1 is welded to the member 6 during spot welding of the member 6 to be welded, the entire electrode tip 1 or a part of the electrode tip 1 is mounted. 2 and the compressed air escapes from the air passage 8.

【0022】この場合に、電極チップ1が装着部2から
完全に抜けてしまったときは勿論、完全に抜けてしまわ
なくとも圧縮空気が漏洩し、この抜けた圧縮空気の補給
は流量制御バルブ12によって直ちに補給されず、従っ
て空気通路8内の空気圧は低下する。
In this case, not only when the electrode tip 1 is completely removed from the mounting section 2 but also when the electrode tip 1 is not completely removed, compressed air leaks. The air pressure in the air passage 8 is reduced.

【0023】これにより、前述のように空気圧の低下に
よってステップS3で圧力スイッチ14がOFFになる
と、ステップS4でこのOFFを検出した制御回路16
は、ステップS5の離脱表示灯のON、ステップS6の
溶接制御電源のOFF、ステップS8の電磁バルブ13
のOFF動作指令を出力し、被溶接部材6に対する溶接
作業の中止、並びにその状態を表示灯の点灯で表示する
ものである。
As described above, when the pressure switch 14 is turned off in step S3 due to a decrease in air pressure as described above, the control circuit 16 which has detected this OFF in step S4.
Indicates that the release indicator light is on in step S5, the welding control power supply is off in step S6, and the electromagnetic valve 13 in step S8.
Is output, and the welding operation for the member 6 to be welded is stopped, and the state of the operation is displayed by turning on an indicator lamp.

【0024】これらによって、電極チップ1の離脱を知
って、ステップS8でその復旧を行い、復旧の完了によ
り制御回路16はステップS9で電磁バルブ13に出力
し、これを導通させて空気通路8の圧力を高め、圧力ス
イッチ14がONされるまで、ステップS8に戻る動作
を繰り返す。
Thus, when the detachment of the electrode tip 1 is known, the recovery is performed in step S8, and upon completion of the recovery, the control circuit 16 outputs the signal to the electromagnetic valve 13 in step S9 to make it conductive so that the air passage 8 is closed. The operation of increasing the pressure and returning to step S8 is repeated until the pressure switch 14 is turned on.

【0025】そして、復旧作業が終了すると、前述のよ
うに空気通路8の圧力が高まって、圧力スイッチ14が
ONした場合にはステップS2に戻り、前記の動作を繰
り返すものである。
When the restoring operation is completed, the pressure in the air passage 8 increases as described above, and when the pressure switch 14 is turned on, the process returns to step S2 to repeat the above operation.

【0026】図6は前述の電極チップ1の離脱と、その
復旧とによる空気通路8の圧縮空気圧の変化を示し、こ
の図においては圧力調整バルブ11で設定する圧縮空気
圧を2kg/cm2 、圧力スイッチ14がOFFとなる
減圧を1kg/cm2 の場合である。
FIG. 6 shows a change in the compressed air pressure in the air passage 8 due to the detachment of the electrode tip 1 and the restoration thereof. In this figure, the compressed air pressure set by the pressure adjusting valve 11 is 2 kg / cm 2 , This is the case where the reduced pressure at which the switch 14 is turned off is 1 kg / cm 2 .

【0027】この実施例においては、前述のように電極
チップ1の完全な離脱のみでなく、圧縮空気が漏洩する
程度の離脱であれば、これを検知して作業者に知らし
め、或いはスポット溶接工程を自動的に停止させ、溶接
不良に基づく製品の品質、信頼性の低下、並びにライン
での問題発生を予防できるものである。
In this embodiment, as described above, not only the complete detachment of the electrode tip 1 but also the detachment to the extent that the compressed air leaks is detected and notified to the operator, or spot welding is performed. The process can be automatically stopped to prevent a decrease in product quality and reliability due to poor welding and to prevent problems in the line.

【0028】[0028]

【発明の効果】以上説明したように本発明は、溶接ガン
の電極チップの完全な離脱は勿論、圧縮空気が抜ける程
度の比較的に不完全な抜けでも、これを確実に、且つ速
やかに検知することができる。
As described above, the present invention reliably and quickly detects not only the complete detachment of the electrode tip of the welding gun but also the relatively incomplete detachment of compressed air. can do.

【0029】そのために、溶接不良に基づく製品の品質
の低下、信頼性の欠如等の問題点を未然に防止できるば
かりでなく、溶接ガンでラインが設けられている場合に
は、次の工程の溶接ガンに対する障害、破損を予防する
ことができ、しかも廉価な設備費用で行うことができる
ものである。
Therefore, not only problems such as deterioration of the quality of the product due to poor welding and lack of reliability can be prevented, but also if a line is provided with a welding gun, the following steps can be performed. The welding gun can be prevented from being damaged or damaged, and can be carried out at low equipment cost.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の回路を含む実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment including a circuit of the present invention.

【図2】本発明を実施した溶接ガンの溶接状態の側面図
である。
FIG. 2 is a side view showing a welding state of the welding gun embodying the present invention.

【図3】同上の断面図である。FIG. 3 is a sectional view of the same.

【図4】同上における電極チップの離脱状態の側面図で
ある。
FIG. 4 is a side view of the electrode tip in a detached state according to the first embodiment.

【図5】図1のフローチャートである。FIG. 5 is a flowchart of FIG.

【図6】この実施例の電極チップの離脱時における圧縮
空気の空気通路の圧力の変化図である。
FIG. 6 is a diagram showing a change in pressure of an air passage of compressed air when the electrode tip of the embodiment is detached.

【符号の説明】[Explanation of symbols]

1 電極チップ 2 装着部 8 空気通路 11 圧力調整バルブ 12 流量制御バルブ 14 圧力スイッチ 15 連通管 16 制御回路 DESCRIPTION OF SYMBOLS 1 Electrode chip 2 Mounting part 8 Air passage 11 Pressure adjustment valve 12 Flow control valve 14 Pressure switch 15 Communication pipe 16 Control circuit

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−62878(JP,A) 実開 昭58−143076(JP,U) 実開 昭62−15874(JP,U) 実開 昭62−105771(JP,U) (58)調査した分野(Int.Cl.6,DB名) B23K 11/00 - 11/36 330 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-57-62878 (JP, A) JP-A 58-143076 (JP, U) JP-A 62-15874 (JP, U) JP-A 62-874 105771 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) B23K 11/00-11/36 330

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 溶接ガンのガン本体の先端部に設けられ
た電極チップを着脱可能に冠着できる各装着部と、該装
着部に通ずる空気通路及び両空気通路を連通させた連通
管と、前記空気通路に一定圧で、供給流量が制限されて
いる圧縮空気を充填する圧縮空気充填手段と、前記圧縮
空気充填手段に前記圧縮空気を供給するとともに、前記
ガン本体に設けられた前記各装着部の前記電極チップを
相互に接触・押圧させるエアシリンダに前記圧縮空気を
供給する圧縮空気タンクと、前記電極チップが離脱した
際の空気通路の圧縮空気圧の減圧を検知する減圧検知手
段と、該減圧検知手段による減圧の検知信号が入力され
る制御手段とを備えたことを特徴とする溶接ガンの電極
チップ離脱検知装置。
1. A mounting portion provided at a tip end portion of a gun body of a welding gun and capable of detachably mounting an electrode tip, an air passage communicating with the mounting portion, and a communication pipe communicating both air passages. at a constant pressure in the air passage, the compressed air filling means for filling the compressed air supply flow rate is limited, the compression
Supplying the compressed air to the air filling means;
The electrode tips of the mounting portions provided on the gun body are
The compressed air is applied to air cylinders that contact and press each other.
A compressed air tank to be supplied; a reduced pressure detecting unit configured to detect a reduced pressure of the compressed air in the air passage when the electrode chip is detached; and a control unit configured to receive a reduced pressure detection signal from the reduced pressure detecting unit. An electrode tip detachment detection device for a welding gun.
JP1655394A 1994-02-10 1994-02-10 Electrode tip detachment detection device for welding gun Expired - Fee Related JP2940848B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1655394A JP2940848B2 (en) 1994-02-10 1994-02-10 Electrode tip detachment detection device for welding gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1655394A JP2940848B2 (en) 1994-02-10 1994-02-10 Electrode tip detachment detection device for welding gun

Publications (2)

Publication Number Publication Date
JPH07223079A JPH07223079A (en) 1995-08-22
JP2940848B2 true JP2940848B2 (en) 1999-08-25

Family

ID=11919476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1655394A Expired - Fee Related JP2940848B2 (en) 1994-02-10 1994-02-10 Electrode tip detachment detection device for welding gun

Country Status (1)

Country Link
JP (1) JP2940848B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040021868A (en) * 2002-09-05 2004-03-11 현대자동차주식회사 Auto dummy gun
CN111515514B (en) * 2020-04-10 2022-04-19 南京钢铁股份有限公司 Travel action control method for electronic gun diaphragm valve

Also Published As

Publication number Publication date
JPH07223079A (en) 1995-08-22

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