JPS61111785A - High frequency type resistance spot projection welder - Google Patents
High frequency type resistance spot projection welderInfo
- Publication number
- JPS61111785A JPS61111785A JP24660785A JP24660785A JPS61111785A JP S61111785 A JPS61111785 A JP S61111785A JP 24660785 A JP24660785 A JP 24660785A JP 24660785 A JP24660785 A JP 24660785A JP S61111785 A JPS61111785 A JP S61111785A
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- current
- welding
- inverter
- slope
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/25—Monitoring devices
- B23K11/252—Monitoring devices using digital means
- B23K11/256—Monitoring devices using digital means the measured parameter being the inter-electrode electrical resistance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Generation Of Surge Voltage And Current (AREA)
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、高周波式抵抗スポット・プロジェクション
溶接機に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency resistance spot projection welding machine.
従来のこの種抵抗溶接機は、溶接電流の通電方式で、交
流式、コンデンサ式、整流式、低周波式２ ・
に分類され、各々次のような特徴がある。Conventional resistance welding machines of this type are classified into AC type, capacitor type, rectification type, and low frequency type, depending on the method of supplying welding current, and each type has the following characteristics.
■ 交流式は、溶接機の構造が簡単で価格も安くて抵抗
溶接で広範囲の施行が可能なため、一般によく用いられ
る方式である。現在高度な制御装置が製作されていて、
溶接電流の種々の制御ができるが、基本となる周波数が
商用周波数の電源を使用しているため、電流制御する最
小時間単位が商用周波数の≠サイクルとなり、それより
短い時間での制御は不可能である。■ The AC type is a commonly used method because the structure of the welding machine is simple, the price is low, and resistance welding can be performed over a wide range of areas. Advanced control devices are currently being manufactured.
The welding current can be controlled in various ways, but since the basic frequency uses a power source with a commercial frequency, the minimum time unit for current control is the commercial frequency ≠ cycle, and control in shorter times is impossible. It is.
■ コンデンサ式は、小型から大型までの溶接機が製作
され、溶接条件もコンデンサの充電電圧や溶接変圧器の
巻数比の変更で溶接電流を変化させ、種々の溶接を行っ
ている。■ Capacitor type welding machines are manufactured from small to large sizes, and various welding conditions are performed by changing the welding current by changing the charging voltage of the capacitor and the turns ratio of the welding transformer.
しかし、溶接電流をコンデンサに充電された電荷を放電
することにより発生させているため立上りの早い溶接電
流を得るには、溶接変圧器の一次側からみたりアクタン
スを小さくしなければならなく、シたがって、溶接変圧
器が大きくなったり、変圧器二次側導体の形状に制約を
受けるように表ってしまう。However, since the welding current is generated by discharging the electric charge stored in the capacitor, in order to obtain a welding current that rises quickly, the actance must be reduced from the perspective of the primary side of the welding transformer. As a result, the welded transformer becomes larger and the shape of the transformer secondary conductor becomes constrained.
３ヘーノ′
寸だ立上りの緩い溶接電流は、コンデンサに充電された
エネルギーを有効に利用できない々ど、限界がある。A welding current with a slow rise of 300° has its limits, as it cannot effectively utilize the energy charged in the capacitor.
■ 整流式や低周波式は、交流式と同じように制御可能
々最小時間単位が商用周波数の捧サイクルであり、それ
より短い時間での制御は不可能である。溶接電流の立上
り時間は、溶接機の二次側導体の形状や整流回路のりア
クタンスや変圧器のリアクタンスによって決定され、電
流の立上りを緩めるのは制御装置で可能であるが、早く
することは上記の制約から困難である。■ Rectifying type and low frequency type can be controlled in the same way as alternating current type.The minimum time unit is the cycle of the commercial frequency, and control in shorter time is impossible. The rise time of the welding current is determined by the shape of the secondary conductor of the welding machine, the rectifier circuit's reactance, and the reactance of the transformer.It is possible to slow down the rise of the current using a control device, but to make it faster, it is possible to This is difficult due to the constraints of
しだがって、従来の上記のような方式では、困難または
不可能であった溶接を可能とするというように従来の溶
接施行範囲を広げる高周波式抵抗スポット・プロジェク
ション溶接機を本発明は提供することを目的とする。Therefore, the present invention provides a high frequency resistance spot projection welding machine that expands the scope of conventional welding by enabling welding that was difficult or impossible with the conventional methods described above. The purpose is to
以下本発明の溶接機の一実施例について第１図の図面と
ともに説明する。図において、１は商用周波数の電源、
２は交流を直流に変換するコンバータ、３は溶接電流の
大きさを制御するための溶接電流制御手段としての可変
抵抗、４は直流を高周波に変換するインバータ、５は高
周波の出力時間を制御する出力時間制御手段としての可
変抵抗、６はスロープの制御を行うだめのスロープ制御
手段としての可変抵抗、７は高周波溶接変圧器、８はそ
の変圧器７の二次側とスポット用もしくはプロジェクシ
ョン用の電極９および被溶接物１０を接続する導体であ
る。もちろん図示してぃ々いが、抵抗溶接機としての加
圧機構は備えている。An embodiment of the welding machine of the present invention will be described below with reference to the drawing of FIG. In the figure, 1 is a commercial frequency power supply,
2 is a converter that converts alternating current to direct current, 3 is a variable resistor as a welding current control means for controlling the magnitude of welding current, 4 is an inverter that converts direct current to high frequency, and 5 is for controlling the output time of high frequency. A variable resistor 6 serves as an output time control means, a variable resistor 6 serves as a slope control means, 7 a high frequency welding transformer, 8 a secondary side of the transformer 7 and a spot or projection resistor. It is a conductor that connects the electrode 9 and the object to be welded 10. Of course, it is not shown in the diagram, but it is equipped with a pressure mechanism as a resistance welder.
そして電源１、コンバータ２、インバータ４、変圧器７
、電極９、被溶接物１０は図のように縦属接続され、ま
た可変抵抗３はコンバータ２に、可変抵抗５，６はイン
バータ４にそれぞれ設けられている。And power supply 1, converter 2, inverter 4, transformer 7
, electrode 9, and workpiece 10 are connected in series as shown in the figure, variable resistor 3 is provided in converter 2, and variable resistors 5 and 6 are provided in inverter 4, respectively.
そして電源１の商用周波数の交流をコンバータ２により
直流に変換し、その直流をインバータ４により高周波電
流に変換してその高周波電流をさらに変圧器７により適
切々溶接電流に変換して電極９に供給し、被溶接物１０
をスポット溶接またはプロジェクション溶接するのであ
る。Then, the converter 2 converts the commercial frequency alternating current from the power source 1 into direct current, the inverter 4 converts the direct current into a high-frequency current, and the transformer 7 further converts the high-frequency current into a welding current, which is then supplied to the electrode 9. Object to be welded 10
It is spot welded or projection welded.
５ベーノ
寸だ、可変抵抗６によりスロープの制御、すなわち高周
波の各サイクルの電流幅を制御して第７図に示すような
種々のスロープ（アップスロープ・ダウンスロープ）電
流を得ることができる。そして、この制御により、ヒー
トバランスのくずれた材質（熱容量の差のある材質）の
被溶接物に対して、電流の大きさの制御とは独立に入熱
期間と冷却期間（電流＝０）の制御を行うことができ、
被溶接物への入熱（温度上昇）を適切としたパルセーシ
ョン効果を発揮でき、この結果、溶接能力範囲を大きく
広げることができる。By controlling the slope, that is, the current width of each cycle of the high frequency, using a variable resistor 6, various slope currents (up slope and down slope) as shown in FIG. 7 can be obtained. With this control, the heat input period and cooling period (current = 0) can be adjusted independently of the control of the current magnitude for the workpiece made of a material with an imbalanced heat balance (material with a difference in heat capacity). can be controlled,
It is possible to achieve a pulsation effect with appropriate heat input (temperature rise) to the workpiece, and as a result, the range of welding performance can be greatly expanded.
なお、可変抵抗３により溶接電流の調整が行われ、また
、可変抵抗５により高周波の出力時間の設定が行われる
。The welding current is adjusted by the variable resistor 3, and the high frequency output time is set by the variable resistor 5.
以上のような構成よりなる本発明の高周波式溶接機は次
のような特長がある。The high frequency welding machine of the present invention constructed as described above has the following features.
（１）第２図に示すように、第３図〜第６図に示すよう
な従来方式のものより制御可能々最小単位時間が短いた
め、立上り（各図の角度θ）の早い（立上り角度が直角
に近い）溶接電流を被溶６ヘー／
接物に流すことができ、また高周波の各サイクルの電流
を制御して第７図に示す種々のスロープ（アップスロー
プ、ダウンスロープ）電流が可能であることから、上記
の立上シが早いものから従来の波形までの波形を利用す
ることで熱伝導の良い材料、薄い材料、突起形状のもの
や小物等の溶接に適する。(1) As shown in Fig. 2, the minimum unit time is shorter for control than the conventional methods shown in Figs. 3 to 6, so the rise (angle θ in each figure) is faster (rise angle The welding current can be passed through the welded object (almost perpendicular), and the current of each cycle of high frequency can be controlled to produce various slope currents (up slope, down slope) as shown in Figure 7. Therefore, by using waveforms ranging from those with quick start-up to conventional waveforms, it is suitable for welding materials with good thermal conductivity, thin materials, protrusion-shaped items, small items, etc.
なお、第３図は交流式で商用周波数１サイクル分の電流
を示す。Ｉｗは溶接電流実効値、θは立上り角度を示す
。第４図はコンデンサ式の溶接電流を、捷だ第５図は三
相全波整流式の溶接電流を、また第６図は三相低周波式
の溶接電流をそれぞれ示す。Note that FIG. 3 shows the current for one cycle of the commercial frequency in an AC type. Iw represents the effective value of welding current, and θ represents the rising angle. Fig. 4 shows the welding current of the capacitor type, Fig. 5 shows the welding current of the three-phase full-wave rectification type, and Fig. 6 shows the welding current of the three-phase low-frequency type.
（２）高周波に変換する電源に矩形波の高周波電圧に変
換するインバータを使用すれば第８図に示すような熱効
率の良いエネルギーを被溶接物に与えることができる。(2) If an inverter that converts the high frequency voltage into a rectangular wave is used as the power source that converts the voltage into a high frequency voltage, energy with good thermal efficiency as shown in FIG. 8 can be applied to the workpiece.
すなわち、高周波式の波形Ａが交流式の波形Ｂに比して
被溶接物に与える熱エネルギーの効率がよいことを第８
図は示している。In other words, the eighth point is that the high-frequency type waveform A is more efficient in providing thermal energy to the workpiece than the AC type waveform B.
The figure shows.
７ベーノ
（３）周波数が高いことから従来方式のものより溶接変
圧器が小型に寿り、容量によっては溶接機の加圧機構に
内蔵でき、作業性が良く、効率の良い溶接機の製作が可
能である。7 Beno (3) Because the frequency is high, the welding transformer can be made smaller than the conventional type, and depending on the capacity, it can be built into the pressurizing mechanism of the welding machine, making it easy to work and producing a highly efficient welding machine. It is possible.
（４）従来方式のものより熱効率が良いため、溶接部以
外への熱影響が少々い。(4) Since the thermal efficiency is better than that of the conventional method, there is little effect of heat on areas other than the welded area.
（５） スロープ制御手段によりスロープの制御、す
なわち高周波の各サイクルの電流幅を制御して種々のス
ロープ電流を得ることができる。そして、この制御によ
り、ヒートバランスのくずれた材質の被溶接物に対して
、電流の大きさの制御とは独立に、入熱期間と冷却期間
の制御を行うことができ、被溶接物への入熱を適切とし
たパルセーション効果を発揮でき、溶接能力範囲を大き
く広げることができる。(5) Various slope currents can be obtained by controlling the slope, that is, controlling the current width of each high frequency cycle by the slope control means. With this control, the heat input period and cooling period can be controlled independently of the current magnitude control for workpieces made of materials with an imbalanced heat balance, and the heat input period and cooling period can be controlled independently of the current magnitude. It can produce a pulsation effect with appropriate heat input, greatly expanding the range of welding capabilities.
以上のように本発明によれば、種々の特長を有する高周
波式抵抗スポット・プロジェクション溶接機を提供する
ことができるものである。As described above, according to the present invention, it is possible to provide a high frequency resistance spot projection welding machine having various features.
第１図は本発明による溶接機の一実施例のブロック図、
第２図は同溶接機の溶接電流波形図、第３図〜第６図は
従来の溶接機の溶接電流波形図、第７図は本発明の溶接
機のスロープ電流波形図、第８図は本発明による溶接機
と交流式溶接機の溶接電流比較図である。
１・・・・・・商用周波数の電源、２・・・・・・交流
−直流変換器（コンバータ）、３，５．６・・・・・・
可変抵抗、４・・・・・・直流−高周波変換器（インバ
ータ）、７・・・・・・高周波溶接変圧器、８・・・・
・・接続導体、９・・・・・・電極、１ｏ・・・・・・
被溶接物。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名へ
塚
城
寸 炉嘱
］ ネ、宇FIG. 1 is a block diagram of an embodiment of a welding machine according to the present invention;
Fig. 2 is a welding current waveform diagram of the welding machine, Figs. 3 to 6 are welding current waveform diagrams of the conventional welding machine, Fig. 7 is a slope current waveform diagram of the welding machine of the present invention, and Fig. 8 is a welding current waveform diagram of the welding machine of the present invention. It is a welding current comparison diagram of a welding machine according to the present invention and an AC welding machine. 1... Commercial frequency power supply, 2... AC-DC converter (converter), 3, 5.6...
Variable resistor, 4...DC-high frequency converter (inverter), 7...High frequency welding transformer, 8...
...Connection conductor, 9...Electrode, 1o...
Object to be welded. Name of agent: Patent attorney Toshio Nakao and one other person
Tsukajo Sun Roka] Ne, U
Claims (1)
コンバータの出力を高周波電源に変換するインバータを
備えてなる高周波電源装置と、高周波の電源を溶接に必
要な電流に変換する高周波溶接変圧器と、被溶接物を加
圧し通電するための電極と、その電極と前記高周波溶接
変圧器間を接続する導体を含めた加圧機構とからなり、
前記高周波電源装置のインバータにスロープ制御用のス
ロープ制御手段を設けた高周波式抵抗スポット・プロジ
ェクション溶接機。A high frequency power supply device comprising a converter that converts a commercial frequency power source to direct current, an inverter that converts the output of this converter to a high frequency power source, and a high frequency welding transformer that converts the high frequency power source to the current necessary for welding. It consists of an electrode for pressurizing and energizing the object to be welded, and a pressurizing mechanism including a conductor connecting the electrode and the high frequency welding transformer,
A high frequency resistance spot projection welding machine, wherein the inverter of the high frequency power supply device is provided with slope control means for slope control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24660785A JPS61111785A (en) | 1985-11-01 | 1985-11-01 | High frequency type resistance spot projection welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24660785A JPS61111785A (en) | 1985-11-01 | 1985-11-01 | High frequency type resistance spot projection welder |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10064278A Division JPS603908B2 (en) | 1978-08-17 | 1978-08-17 | High frequency resistance spot projection welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61111785A true JPS61111785A (en) | 1986-05-29 |
| JPH0247312B2 JPH0247312B2 (en) | 1990-10-19 |
Family
ID=17150923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24660785A Granted JPS61111785A (en) | 1985-11-01 | 1985-11-01 | High frequency type resistance spot projection welder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61111785A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01293985A (en) * | 1988-05-20 | 1989-11-27 | Dengensha Mfg Co Ltd | Inverter type resistance welding machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4825626A (en) * | 1971-08-06 | 1973-04-03 | ||
| JPS5284142A (en) * | 1975-11-12 | 1977-07-13 | Gloemmen Jon E | Arc welding machine |
| JPS5486451A (en) * | 1977-12-22 | 1979-07-10 | Osaka Transformer Co Ltd | Spot welder |
| JPS603908A (en) * | 1983-06-22 | 1985-01-10 | Ishikawajima Harima Heavy Ind Co Ltd | Method and equipment for correctingly controlling rolling reduction in rolling mill |
-
1985
- 1985-11-01 JP JP24660785A patent/JPS61111785A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4825626A (en) * | 1971-08-06 | 1973-04-03 | ||
| JPS5284142A (en) * | 1975-11-12 | 1977-07-13 | Gloemmen Jon E | Arc welding machine |
| JPS5486451A (en) * | 1977-12-22 | 1979-07-10 | Osaka Transformer Co Ltd | Spot welder |
| JPS603908A (en) * | 1983-06-22 | 1985-01-10 | Ishikawajima Harima Heavy Ind Co Ltd | Method and equipment for correctingly controlling rolling reduction in rolling mill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01293985A (en) * | 1988-05-20 | 1989-11-27 | Dengensha Mfg Co Ltd | Inverter type resistance welding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0247312B2 (en) | 1990-10-19 |
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