JPH0367478B2 - - Google Patents
Info
- Publication number
- JPH0367478B2 JPH0367478B2 JP24272984A JP24272984A JPH0367478B2 JP H0367478 B2 JPH0367478 B2 JP H0367478B2 JP 24272984 A JP24272984 A JP 24272984A JP 24272984 A JP24272984 A JP 24272984A JP H0367478 B2 JPH0367478 B2 JP H0367478B2
- Authority
- JP
- Japan
- Prior art keywords
- welded
- filler metal
- pressure roller
- high frequency
- extra
- 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
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
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/003—Cooling means for welding or cutting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- General Induction Heating (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、被溶接材の溶接部に余盛用充填金
属を圧接して溶着する高周波抵抗溶接方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a high frequency resistance welding method for press-welding and welding filler metal for extra buildup to a welded portion of a workpiece.
一般に、余盛用充填金属を用いた高周波抵抗溶
接を行なう場合、被溶接材の溶接部に余盛用充填
金属を接合し、被溶接材と余盛用充填金属との間
に高周波電源による高周波電流を通流して被溶接
材および余盛用充填金属を圧接可能温度に加熱
し、加圧ローラにより被溶接材の溶接部に余盛用
充填金属を圧接して溶着させている。
Generally, when performing high-frequency resistance welding using filler metal for reinforcement, the filler metal for reinforcement is joined to the welded part of the material to be welded, and a high-frequency power source is used between the material to be welded and the filler metal for reinforcement. Electric current is passed through the material to be welded and the filler metal for extra buildup is heated to a temperature that allows pressure welding, and a pressure roller presses and welds the filler metal for extra buildup to the welded portion of the workpiece.
このとき、余盛用充填金属には通常断面三角形
のものを用い、高周波抵抗溶接に必要なＶ−収束
角、すなわち加圧ローラ近傍の余盛用充填金属と
被溶接材とのなす所定の角度を容易に得られるよ
うにしている。 At this time, the filler metal for the extra layer usually has a triangular cross section, and the V-convergence angle required for high frequency resistance welding, that is, the predetermined angle between the filler metal for the extra layer near the pressure roller and the workpiece to be welded, is used. is made easy to obtain.
ところが、余盛用充填金属の断面積が被溶接材
の断面積に比べてはるかに小さいため、余盛用充
填金属の熱容量と被溶接材の熱容量とが大きく異
なり、高周波電流の通流により余盛用充填金属の
温度だけが上昇して被溶接材の温度はあまり上昇
せず、被溶接材の温度が圧接可能温度に達する前
に、余盛用充填金属の温度は前記圧接可能温度を
はるかに上回つて余盛用充填金属が溶断すること
があり、余盛用充填金属の溶断を防ぐために高周
波電流の電流値を下げれば、被溶接材が圧接可能
温度に達せず、いずれにしても溶接を行なうこと
ができないという問題がある。
However, because the cross-sectional area of the filler metal for the reinforcement is much smaller than the cross-sectional area of the material to be welded, the heat capacity of the filler metal for the reinforcement and the heat capacity of the material to be welded are significantly different, and the excess is reduced due to the passage of high-frequency current. Only the temperature of the filler metal for the filler layer rises, and the temperature of the material to be welded does not rise much, and before the temperature of the material to be welded reaches the temperature that allows pressure welding, the temperature of the filler metal for the extra filler rises far above the temperature that allows pressure welding. If the current value of the high-frequency current is lowered to prevent the filling metal for the reinforcement from melting, the material to be welded will not reach the temperature at which pressure can be welded, and in any case, the filling metal for the reinforcement may melt. There is a problem that welding cannot be performed.
そこで他の高周波電源により被溶接材のみを予
熱することが従来考えられているが、高価になる
点は否めない。 Conventionally, it has been considered to preheat only the material to be welded using another high-frequency power source, but this method is undeniably expensive.
この発明は、被溶接材の溶接部に余盛用充填金
属を接合し、前記被溶接材と前記余盛用充填金属
との間に高周波電源による高周波電流を通流し、
加圧ローラにより前記溶接部に前記余盛用充填金
属を圧接して溶着させる高周波抵抗溶接方法にお
いて、前記加圧ローラの近傍の前記余盛用充填金
属の未溶着部分を冷却することを特徴とする高周
波抵抗溶接方法である。
This invention involves joining a filler metal for extra buildup to a welded portion of a material to be welded, passing a high frequency current from a high frequency power supply between the material to be welded and the filling metal for extra buildup,
A high frequency resistance welding method in which the filler metal for extra buildup is pressure-welded to the welded portion by a pressure roller, characterized in that an unwelded portion of the filler metal for extra buildup near the pressure roller is cooled. This is a high frequency resistance welding method.
つぎに、この発明の作用について説明すると、
加圧ローラの近傍の余盛用充填金属の未溶着部分
を冷却するため、大きな高周波電流を通流して
も、被溶接材が圧接可能温度に達する前に余盛用
充填金属が溶断することはない。
Next, to explain the operation of this invention,
In order to cool the unwelded part of the filler metal for the extra layer near the pressure roller, even if a large high-frequency current is passed through, the filler metal for the extra layer will not melt before the material to be welded reaches a pressure welding temperature. do not have.
つぎに、この発明の実施例を示した図面につい
て説明する。
Next, drawings showing embodiments of the invention will be described.
まず、１実施例を示した第１図、第２図につい
て説明する。 First, FIG. 1 and FIG. 2 showing one embodiment will be explained.
第１図において、１，２は被溶接材である２枚
の平板、３は両平板１，２の溶接部に形成された
Ｖ型開先、４は供給ロールから繰り出され溶接部
の開先３に接合される断面三角形の余盛用充填金
属、５は開先３に接合された充填金属４を開先３
の開先壁に圧接する中空の加圧ローラであり、第
２図ａ，ｂに示すように、支持体６のフード部７
の内側に配設されて回転自在に支持されており、
加圧ローラ５の周面に複数個の透孔８が透設さ
れ、支持体６の側面に設けられ、加圧ローラ５の
回転軸部分に接続されて加圧ローラ５の内部に連
通したパイプ９を介し、加圧ローラ５内に炭酸ガ
スなどの冷媒が供給され、透孔８を介して前記冷
媒を噴出する。 In Figure 1, 1 and 2 are two flat plates that are the materials to be welded, 3 is a V-shaped groove formed at the welded part of both flat plates 1 and 2, and 4 is a groove at the welded part that is fed out from the supply roll. 3 is a filler metal with a triangular cross-section for additional heaping, and 5 is a filler metal 4 that is joined to the groove 3.
It is a hollow pressure roller that comes into pressure contact with the groove wall of the support body 6, as shown in FIGS. 2a and 2b.
It is arranged inside and is rotatably supported,
A plurality of through holes 8 are provided on the circumferential surface of the pressure roller 5, a pipe is provided on the side surface of the support body 6, and is connected to the rotating shaft portion of the pressure roller 5 and communicates with the inside of the pressure roller 5. A refrigerant such as carbon dioxide gas is supplied into the pressure roller 5 through the pressure roller 9 , and the refrigerant is ejected through the through holes 8 .
１０は高周波発振機からなる高周波電源、１
１，１２はそれぞれ整合盤・出力トランス１３を
介して高周波電源１０に接続されたコンタクタで
あり、一方の２個のコンタクタ１１は両平板１，
２にそれぞれ電気的に接触されるとともに、他方
のコンタクタ１２は充填金属４に接触され、電源
１０からの高周波電流がコンタクタ１１、両平板
１，２、加圧ローラ５の近傍の接合部、充填金属
４、コンタクタ１２の経路を流れ、表皮効果、近
接効果により加圧ローラ５の近傍の両平板１，２
および充填金属５が加熱される。 10 is a high frequency power source consisting of a high frequency oscillator; 1
1 and 12 are contactors connected to the high-frequency power supply 10 via a matching board/output transformer 13, and one of the two contactors 11 is connected to both flat plates 1,
2, and the other contactor 12 is brought into contact with the filling metal 4, and the high frequency current from the power source 10 is applied to the contactor 11, both flat plates 1 and 2, the joint near the pressure roller 5, and the filling metal 4. The metal 4 flows through the path of the contactor 12, and both flat plates 1 and 2 near the pressure roller 5 due to the skin effect and proximity effect.
and the filling metal 5 is heated.
このとき、支持体６のフード部７は、加圧ロー
ラ５のコンタクタ１２側と反対側およびコンタク
タ１２側の上半分を覆うような形状にし、ローラ
５の内部の冷媒がコンタクタ１２側の下半分の透
孔８から噴出するようにしている。 At this time, the hood part 7 of the support body 6 is shaped so as to cover the opposite side of the pressure roller 5 to the contactor 12 side and the upper half of the contactor 12 side, so that the refrigerant inside the roller 5 is absorbed into the lower half of the contactor 12 side. It is made to eject from the through hole 8.
そして、高周波電源１０からの高周波電流によ
り、熱容量の小さい充填金属４が両平板１，２よ
りも早く圧接可能温度に達するが、加圧ローラ５
の透孔８から第１図中の矢印のように噴出する冷
媒により、充填金属４の加圧ローラ５の近傍の未
溶着部分が冷却されるため、当該未溶着部分にお
いて充填金属４が溶断することが防止され、高周
波電源１０の出力を増大すれば、充填金属４が溶
断することなく両平板１，２が容易に圧接可能温
度に達する。 Due to the high-frequency current from the high-frequency power source 10, the filling metal 4 with a small heat capacity reaches a pressure-welding temperature earlier than both flat plates 1 and 2, but the pressure roller 5
The unwelded portion of the filling metal 4 near the pressure roller 5 is cooled by the refrigerant spouted from the through hole 8 in the direction of the arrow in FIG. 1, so that the filling metal 4 is fused at the unwelded portion. If this is prevented and the output of the high frequency power source 10 is increased, both the flat plates 1 and 2 can easily reach a temperature at which they can be pressed together without the filling metal 4 melting.
なお、被溶接材の溶接部が、第３図に示すよう
に、平版１４および立設板１５からなる隅肉溶接
部であつてもよく、この場合、高周波電源１０に
よる高周波電源の通流時に、端面効果により平板
１４に比べて立設板１５の方が温度上昇するた
め、誘導加熱用コイル１６に整合盤・出力トラン
ス１７を介して他の高周波電源１８による高周波
電流を通流し、コイル１６による誘導電流によ
り、平板１４を予熱する。 In addition, the welded part of the material to be welded may be a fillet welded part formed by the flat plate 14 and the standing plate 15, as shown in FIG. Because the temperature of the standing plate 15 rises more than that of the flat plate 14 due to the end face effect, a high frequency current from another high frequency power source 18 is passed through the induction heating coil 16 via the matching board/output transformer 17 to increase the temperature of the coil 16. The flat plate 14 is preheated by the induced current.
また、充填金属４の冷却手段は、前記した透孔
８からの冷媒に限るものではない。 Further, the means for cooling the filling metal 4 is not limited to the refrigerant flowing through the through holes 8 described above.
したがつて、この発明によると、加圧ローラ５
の近傍の余盛用充填金属４の未溶着部分を冷却す
るため、充填金属４が溶断することなく、高周波
電源１０の出力を増大して被溶接材の圧接可能温
度に加熱することができ、充填金属４の溶断によ
る溶接作業の中断、あるいは被溶接材の加熱不足
による充填金属４に未溶着などを確実に防止する
ことができ、その効果は非常に顕著である。
Therefore, according to the present invention, the pressure roller 5
In order to cool the unwelded portion of the filler metal 4 for extra buildup near the welding area, the output of the high frequency power source 10 can be increased to heat the material to be welded to a temperature that allows pressure welding, without the filler metal 4 melting down. It is possible to reliably prevent interruption of the welding operation due to melting of the filler metal 4 or non-welding of the filler metal 4 due to insufficient heating of the material to be welded, and the effect is very remarkable.
さらに、被溶接材が第１図のように平板１，２
である場合には、平板１，２の予熱手段が不要に
なり、コストダウンを図ることができる。 Furthermore, the materials to be welded are flat plates 1 and 2 as shown in Figure 1.
In this case, preheating means for the flat plates 1 and 2 is not required, and costs can be reduced.
また、支持体６のフード部７により、冷媒を充
填金属４の加圧ローラ５の近傍の未溶着部分に有
効に噴射して冷却することができる。 Further, the hood portion 7 of the support body 6 can effectively inject the refrigerant into the unwelded portion of the filled metal 4 near the pressure roller 5 to cool it.
図面は、この発明の高周波抵抗溶接方法の実施
例を示し、第１図は１実施例の斜視図、第２図
ａ，ｂは第１図における加圧ローラの側面図およ
び断面図、第３図は他の実施例の斜視図である。
１，２，１４……平板、３……開先、４……充
填金属、５……加圧ローラ、８……透孔、１０…
…高周波電源、１５……立設板。
The drawings show an embodiment of the high frequency resistance welding method of the present invention, FIG. 1 is a perspective view of one embodiment, FIGS. 2a and 2b are side views and sectional views of the pressure roller in FIG. 1, and FIG. The figure is a perspective view of another embodiment. 1, 2, 14... flat plate, 3... groove, 4... filling metal, 5... pressure roller, 8... through hole, 10...
...High frequency power supply, 15... Standing board.
Claims (1)
し、前記被溶接材と前記余盛用充填金属との間に
高周波電源による高周波電流を通流し、加圧ロー
ラにより前記溶接部に前記余盛用充填金属を圧接
して溶着させる高周波抵抗溶接方法において、前
記加圧ローラの近傍の前記余盛用充填金属の未溶
着部分を冷却することを特徴とする高周波抵抗溶
接方法。1. Join a filler metal for extra buildup to the welded part of the material to be welded, pass a high frequency current from a high frequency power source between the workpiece to be welded and the filler metal for extra buildup, and apply the above to the welded part using a pressure roller. A high frequency resistance welding method for welding filler metal for extra buildup by pressure welding, the high frequency resistance welding method comprising cooling an unwelded portion of the filler metal for extra buildup near the pressure roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24272984A JPS61123478A (en) | 1984-11-16 | 1984-11-16 | High frequency resistance welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24272984A JPS61123478A (en) | 1984-11-16 | 1984-11-16 | High frequency resistance welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61123478A JPS61123478A (en) | 1986-06-11 |
| JPH0367478B2 true JPH0367478B2 (en) | 1991-10-23 |
Family
ID=17093375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24272984A Granted JPS61123478A (en) | 1984-11-16 | 1984-11-16 | High frequency resistance welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61123478A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010061454A1 (en) * | 2010-12-21 | 2012-06-21 | Thyssenkrupp Steel Europe Ag | High-frequency welding of sandwich panels |
| US10589389B2 (en) * | 2016-04-18 | 2020-03-17 | Liquidmetal Coatings, Llc | Apparatus and method for cooling a hard metal applied to the surface of a metal alloy substrate |
-
1984
- 1984-11-16 JP JP24272984A patent/JPS61123478A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61123478A (en) | 1986-06-11 |
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