JPS592589B2 - flash welding equipment - Google Patents
flash welding equipmentInfo
- Publication number
- JPS592589B2 JPS592589B2 JP3322776A JP3322776A JPS592589B2 JP S592589 B2 JPS592589 B2 JP S592589B2 JP 3322776 A JP3322776 A JP 3322776A JP 3322776 A JP3322776 A JP 3322776A JP S592589 B2 JPS592589 B2 JP S592589B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- flash
- flash welding
- speed
- electrode
- 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
Links
Landscapes
- Resistance Welding (AREA)
Description
【発明の詳細な説明】
この発明は、フラッシュ溶接機のフラッシュ行程中にお
ける固定電極と移動電極との間の圧力を検出し、その信
号と上記圧力を所定値に保つための基準信号とを比較し
、その偏差に応じて移動電極を基準信号によつて設定さ
れた圧力に応じた速度で、駆動することにより、良好な
溶接継手を得るためのフラッシュ溶接装置に関するもの
である。Detailed Description of the Invention This invention detects the pressure between a fixed electrode and a moving electrode during the flash stroke of a flash welding machine, and compares the signal with a reference signal for maintaining the pressure at a predetermined value. The present invention relates to a flash welding device for obtaining a good welded joint by driving a moving electrode at a speed corresponding to a pressure set by a reference signal in accordance with the deviation.
フラッシュ溶接は一対の被溶接材を対向する固定電極と
移動電極に固定し、両電極間に電圧を印加した状態で、
移動電極を固定電極にフラッシュ速度で漸進させて被溶
接材の対向面にフラッシュを発生させ、その対向面が十
分加熱された状態に達したとき、移動電極を固定電極に
急速に接触加圧させるアプセツト行程により、一対の被
溶接材を熱間圧接する溶接方法である。このフラッシュ
溶接方法において、欠陥のない良好な溶接継手を得るた
めには適正なフラッシュ速度を用いて、細かく柔いフラ
ッシュを連続的に発生させる必要があるということは周
知の事実である。今、上記フラッシュ速度が適正値よ沙
大きい場合には、被溶接材の対向面に面積の大きい短絡
が生じ、大きな短絡電流が流れるために荒く大きなフラ
ッシュとなり、対向面に深いクレータが生じてアブセツ
ト行程終了後も空洞として残わ溶接欠陥となる。一方、
フラッシュ速度が適正値より小さい場合には、間欠的な
小さなフラッシュとなり、フラッシュが発生していない
ときに対向面が酸化されて酸化膜が残わ溶接欠陥となる
。従来のフラッシュ溶接装置においては、一定の速度あ
るいは加速度で移動電極を強制的に前進させるだけで、
フラッシュの状態が変化してもフラッシュ速度を補正す
ることができなかつたため、フラッシュ行程中適正なフ
ラッシュ速度になることが少なく、その結果、上記のよ
うな理由で被溶接材の溶接面にクレータや酸化膜が生じ
、欠陥のない良好な溶接継手を得ることが困難であつた
。In flash welding, a pair of materials to be welded is fixed to a fixed electrode and a moving electrode that face each other, and a voltage is applied between both electrodes.
The moving electrode is gradually advanced toward the fixed electrode at a flash speed to generate a flash on the opposing surface of the material to be welded, and when the opposing surface reaches a sufficiently heated state, the moving electrode is rapidly brought into contact with the fixed electrode and pressurized. This is a welding method in which a pair of materials to be welded are hot-pressed together through an upset process. It is a well-known fact that in this flash welding method, in order to obtain a good welded joint without defects, it is necessary to continuously generate fine and soft flashes using an appropriate flash rate. Now, if the flash speed mentioned above is much higher than the appropriate value, a short circuit with a large area will occur on the opposite surface of the welded material, a large short circuit current will flow, resulting in a rough and large flash, and a deep crater will occur on the opposite surface, resulting in an absorption. Even after the process is completed, a cavity remains as a welding defect. on the other hand,
If the flash speed is lower than the appropriate value, intermittent small flashes will occur, and when flashes are not occurring, the opposing surface will be oxidized and an oxide film will remain, resulting in a welding defect. In conventional flash welding equipment, the moving electrode is simply forced forward at a constant speed or acceleration.
Because the flash speed could not be corrected even if the flash conditions changed, the flash speed rarely reached the appropriate flash speed during the flash process, and as a result, craters and An oxide film was formed, making it difficult to obtain a good welded joint without defects.
この発明は、上記従来装置における欠点を解消すること
を目的として成されたもので、一定のフラッシュ速度で
移動電極を前進させる場合において、被溶接材の対向面
に大きな短絡が生じて荒く大きなフラッシュが発生する
ときは固定電極と移動電極との間の圧力が大きくなり、
小さな短絡により間欠的なフラツシユが発生するときは
上記両電極間の圧力が小さくなることに着目したもので
ある。以下、この発明に卦けるフラツシユ溶接装置の一
実施例を図に基づいて詳細に誠明する。This invention was made with the aim of eliminating the drawbacks of the conventional devices described above. When moving the moving electrode forward at a constant flash speed, a large short circuit occurs on the opposing surface of the workpiece, resulting in a rough and large flash. When this occurs, the pressure between the fixed electrode and the moving electrode increases,
This method focuses on the fact that when intermittent flashing occurs due to a small short circuit, the pressure between the two electrodes decreases. Hereinafter, one embodiment of a flash welding device according to the present invention will be explained in detail based on the drawings.
図はこの発明におけるフラツシユ溶接装置の一実施例の
構成を示すプロツク図である。The figure is a block diagram showing the configuration of an embodiment of a flash welding device according to the present invention.
図において、１は固定電極、２は移動電極、３ａ，３ｂ
は固定電極１及び移動電極２に保持された被溶接材、４
は移動電極２を駆動する油圧シリンダーで、ピストン軸
４ａを介して移動電極２と連結されている。In the figure, 1 is a fixed electrode, 2 is a moving electrode, 3a, 3b
are the workpieces to be welded held by the fixed electrode 1 and the moving electrode 2;
is a hydraulic cylinder that drives the movable electrode 2, and is connected to the movable electrode 2 via a piston shaft 4a.
５はピストン軸４ａに貼付された歪みゲージで、フラツ
シユ行程中における両電極１，２間の圧力を検出する。A strain gauge 5 is attached to the piston shaft 4a and detects the pressure between the electrodes 1 and 2 during the flash stroke.
６はこの圧力を所定値に保つための基準信号を投ボする
信号設定装置、７は歪みゲージ５ＶＣよつて検出された
圧力による信号と、信号設定装置６によつて設定された
基準信号とを比較し、その偏差を検出する圧力比較装置
、８は流量調整装置で上記圧力比較装置７によつて検出
された偏差に応じて、移動電極２を上記基準信号によつ
て設定された圧力に応じた速度で駆動するに必要な油の
量を調整して油圧シリンダー４ＶＣ供給する。6 is a signal setting device that sends a reference signal to maintain this pressure at a predetermined value; 7 is a signal setting device that sends a signal based on the pressure detected by the strain gauge 5VC and a reference signal set by the signal setting device 6. A pressure comparator 8 is a flow rate adjusting device that controls the moving electrode 2 according to the deviation detected by the pressure comparator 7 according to the pressure set by the reference signal. Adjust the amount of oil necessary to drive at the specified speed and supply 4 VC of oil to the hydraulic cylinder.
９は油圧源である。9 is a hydraulic power source.
次に上記のように構成されたフラッシユ溶接装置の動作
を図に基づいて説明する。まぞ一対の被溶接材３ａ，３
ｂを固定電極１及び移動電極２に設置し、両電極１，２
間に電圧を印加した状態で移動電極２を固定電極１にフ
ラツシユ速度で接近させると、両電極１，２に設置され
た被溶接材３ａ，３ｂの対向面にフラツシユが発生する
。Next, the operation of the flash welding apparatus configured as described above will be explained based on the drawings. A pair of materials to be welded 3a, 3
b is installed on the fixed electrode 1 and the moving electrode 2, and both electrodes 1 and 2
When the movable electrode 2 approaches the fixed electrode 1 at a flashing speed with a voltage applied therebetween, flashing occurs on the opposing surfaces of the welded materials 3a and 3b placed on both electrodes 1 and 2.
この対向面は互のフラツシユによつて清浄、加熱されて
フラツシユ行程からアブセツト行程に移行するわけであ
るが、このフラツシユ行程中において、被溶接材３ａ，
３ｂの対向面に荒く大きなフラツシユが発生し圧力比較
装置７によつて、歪みゲージ５で検出された圧力の信号
が信号設定装置６によつて設定された基準信号より大き
な偏差として検出された場合、流量調整装置、８は油圧
シリンダー４ＶＣ供給する油の量を制限してシリンダー
速度すなわちフラツシュ速度を減じてフラツシユの大き
さを緩和する。又、逆に間欠的で小さなフラツシユが発
生し圧力比較装置７によつて、歪みゲージ５で検出され
た圧力の信号設定装置６（ｆ−よつて設定された基準信
号より小さな偏差として検出された場合、流量調整装置
８は油圧シリンダー４に供給する油の量を増加してシリ
ンダー速度すなわちフラツシユ速度を上昇させフラツシ
ユを連続して発生させる。以上の動作を繰返すことによ
り常に適正なフラツシユ速度で移動電極２を駆動し細く
柔いフラツシユを連続的に発生することができる。な卦
移動電極２の駆動に油圧シリンダー４を用いると、速度
制御が比較的容易であると共にかなり大きな駆動力を発
生し得る等の効果があるがもちろんこの限りではない又
両電極１，２間の圧力検出に歪みゲージ５を用いると取
付けが比較的簡単となる。以上、要するにこの発明にお
けるフラツシユ溶接装置は、フラツシユ行程中に訃ける
両電極間の圧力を検出し、その信号と上記圧力を所定値
に保つための基準信号とを比較し、その偏差に応じて移
動電極を基準信号によつて設定された圧力に応じた速度
で駆動することにより、細く柔いフラツシユを連続的に
発生させ良好な溶接継手を得ることが可能となつた点に
おける実用上の効果は著しい。These opposing surfaces are cleaned and heated by each other's flashing, and the flashing process moves to the absorption process. During this flashing process, the materials to be welded 3a,
3b, and the pressure comparator 7 detects that the pressure signal detected by the strain gauge 5 has a larger deviation than the reference signal set by the signal setting device 6. , a flow rate regulator 8 limits the amount of oil supplied to the hydraulic cylinder 4VC to reduce the cylinder speed, ie, the flash speed, to reduce the magnitude of the flash. Conversely, intermittent small flashes occur, and the pressure comparator 7 detects the pressure detected by the strain gauge 5 as a smaller deviation from the reference signal set by the signal setting device 6 (f). In this case, the flow rate adjustment device 8 increases the amount of oil supplied to the hydraulic cylinder 4 to increase the cylinder speed, that is, the flash speed, and continuously generate flashes.By repeating the above operation, the flash is always moved at an appropriate flash speed. By driving the electrode 2, it is possible to continuously generate a thin and soft flash.If the hydraulic cylinder 4 is used to drive the moving electrode 2, speed control is relatively easy and a considerably large driving force can be generated. However, the present invention is not limited to this, and if the strain gauge 5 is used to detect the pressure between the electrodes 1 and 2, the installation becomes relatively simple. Detect the pressure between the two electrodes, compare the signal with a reference signal to maintain the pressure at a predetermined value, and adjust the moving electrode to the pressure set by the reference signal according to the deviation. By driving at a suitable speed, it is possible to continuously generate thin, soft flashes and obtain a good welded joint, which is a remarkable practical effect.
図はこの発明におけるフラツシユ溶接装置の一実施例の
構成を示すプロツク図である。
図ＶＣ｝いて、１は固定電極、２は移動電極、３ａ，３
ｂは被溶接材、４は油圧シリンダー、４ａはピストン軸
、５は歪みゲージ、６は信号設定装置、７は圧力比較装
置、８は流量調整装置、９は油圧源である。The figure is a block diagram showing the configuration of an embodiment of a flash welding device according to the present invention. Figure VC}, 1 is a fixed electrode, 2 is a moving electrode, 3a, 3
b is a material to be welded, 4 is a hydraulic cylinder, 4a is a piston shaft, 5 is a strain gauge, 6 is a signal setting device, 7 is a pressure comparison device, 8 is a flow rate adjustment device, and 9 is a hydraulic source.
Claims (1)
間の圧力を検出する圧力検出装置と上記圧力検出装置の
出力信号と上記圧力を所定値に保つための基準信号とを
比較しその偏差を検出する圧力比較装置と、上記偏差に
応じて、移動電極を上記基準信号によつて設定された圧
力に応じた速度で駆動する駆動装置とを備えたことを特
徴とするフラッシュ溶接装置。 ２ 駆動装置に油圧シリンダーを用いたことを特徴とす
る特許請求の範囲第１項記載のフラッシュ溶接装置。 ３ 圧力検出装置に歪みゲージを用いたことを特徴とす
る特許請求の範囲第１項または第２項記載のフラッシュ
溶接装置。[Claims] 1. A pressure detection device that detects the pressure between the fixed electrode and the moving electrode during the flush stroke, and a comparison between the output signal of the pressure detection device and a reference signal for maintaining the pressure at a predetermined value. Flash welding comprising: a pressure comparator for detecting the deviation; and a driving device for driving the moving electrode at a speed corresponding to the pressure set by the reference signal in accordance with the deviation. Device. 2. The flash welding device according to claim 1, characterized in that a hydraulic cylinder is used as the drive device. 3. The flash welding apparatus according to claim 1 or 2, characterized in that a strain gauge is used as the pressure detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3322776A JPS592589B2 (en) | 1976-03-26 | 1976-03-26 | flash welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3322776A JPS592589B2 (en) | 1976-03-26 | 1976-03-26 | flash welding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52116751A JPS52116751A (en) | 1977-09-30 |
| JPS592589B2 true JPS592589B2 (en) | 1984-01-19 |
Family
ID=12380559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3322776A Expired JPS592589B2 (en) | 1976-03-26 | 1976-03-26 | flash welding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS592589B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0222311Y2 (en) * | 1984-12-26 | 1990-06-15 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58196183A (en) * | 1982-05-08 | 1983-11-15 | Sharp Corp | Butt resistance welding machine for fine wire |
| JPH01130884A (en) * | 1987-11-13 | 1989-05-23 | Kohoku Kogyo Kk | Device for detecting penetration amount of welding |
-
1976
- 1976-03-26 JP JP3322776A patent/JPS592589B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0222311Y2 (en) * | 1984-12-26 | 1990-06-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52116751A (en) | 1977-09-30 |
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