JPS649111B2 - - Google Patents
Info
- Publication number
- JPS649111B2 JPS649111B2 JP28117484A JP28117484A JPS649111B2 JP S649111 B2 JPS649111 B2 JP S649111B2 JP 28117484 A JP28117484 A JP 28117484A JP 28117484 A JP28117484 A JP 28117484A JP S649111 B2 JPS649111 B2 JP S649111B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- arc
- crater
- time
- gap
- 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
- 238000003466 welding Methods 0.000 claims description 66
- 238000000034 method Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、比較的肉薄の板材から成るワークの
２枚を互いに溶接するミグ式のアークスポツト溶
接方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a MIG type arc spot welding method for welding together two workpieces made of relatively thin plate materials.
（従来の技術）
比較的肉薄の鋼板からなるワークの２枚を重合
してこれに比較的短時間の主溶接を行なつた後、
これに比し長い休止期間を経て比較的短時間のク
レータ溶接を行なうミグ式のアークスポツト溶接
方法は、本件出願人によつて提案されて知られて
いる（特開昭57−94473号公報）。(Prior art) After superposing two workpieces made of relatively thin steel plates and performing main welding for a relatively short time,
In contrast, the MIG arc spot welding method, which performs crater welding in a relatively short time after a long rest period, has been proposed by the applicant and is known (Japanese Patent Laid-Open No. 57-94473). .
この溶接方法によれば、溶接部は一旦昇温した
後降温してたとえば800度〜900度に保たれ次で一
旦昇温した後漸次降温して製品となり、ワークに
溶け落ちがないと共にピンホール或は割れ等の発
生も無く、優れた製品が得られる。 According to this welding method, the temperature of the welded part is raised once and then lowered to maintain it at, for example, 800 to 900 degrees.Then, the temperature is raised once and then gradually lowered to form a product.There is no burn-through on the workpiece and there are no pinholes. Or, an excellent product can be obtained without cracking or the like.
（発明が解決しようとする問題点）
上記溶接方法においては、ワークの板厚や２枚
のワークの重合状態を想定して溶接電流値等の溶
接条件を予め決めて行なつているが、自動車車体
のように比較的大型で複雑な形状のワークを溶接
する場合には、２枚のワーク間の間隙が一定しな
いため設定した状態と一致しないから、溶接部に
穴が明いたり、肉盛不足になる等の不都合が生じ
た。(Problems to be Solved by the Invention) In the above welding method, welding conditions such as the welding current value are determined in advance based on the thickness of the workpiece and the overlapping state of the two workpieces. When welding workpieces that are relatively large and have complex shapes, such as car bodies, the gap between the two workpieces is inconsistent and does not match the set condition, resulting in holes in the weld or insufficient overlay. Inconveniences such as
したがつてロボツトによつて自動溶接を行なう
場合、溶接品質の優れた溶接ができない不都合が
あつた。 Therefore, when automatic welding is performed by a robot, there is a problem in that it is not possible to perform welding with excellent welding quality.
本発明は、かかる不都合の無いアークスポツト
方法を提供することをその目的とするものであ
る。 It is an object of the present invention to provide an arc spotting method that does not have such disadvantages.
（問題点を解決するための手段）
本発明は、比較的肉薄の板材からなるワークの
２枚を重合してこれに比較的短時間の主溶接を行
なつた後、休止時間を経て比較的短時間のクレー
タ溶接を行なうミグ式アークスポツト溶接方法に
おいて、該主溶接の際のアーク発生開始時のアー
ク電圧と、電極と下側ワーク間のアーク電圧との
差を検出し、その電圧差に応じた溶接条件により
クレータ溶接を行なうことを特徴とする。(Means for Solving the Problems) The present invention involves superimposing two workpieces made of relatively thin plates, performing main welding on them for a relatively short time, and then, after a rest period, relatively In the MIG arc spot welding method that performs short-time crater welding, the difference between the arc voltage at the start of arc generation during main welding and the arc voltage between the electrode and the lower workpiece is detected, and the voltage difference is It is characterized by performing crater welding under suitable welding conditions.
（実施例） 本発明の実施例を図面に付き説明する。(Example) Embodiments of the present invention will be described with reference to the drawings.
第１図に示すように比較的肉薄の鋼板から成る
ワーク１の２枚を重合したものにミグ式のアーク
スポツト溶接を施す場合、その溶接は次のように
行なわれるようにする。 As shown in FIG. 1, when MIG type arc spot welding is applied to two overlapping workpieces 1 made of relatively thin steel plates, the welding is performed as follows.
即ち、第２図に示すように、先ず溶接電流1
による比較的短時間T1の主溶接Ａが行なわれた
後、休止時間T2を経てクレータ溶接電流2によ
る比較的短時間T3のクレータ溶接Ｂが行なわれ、
ワーク１，１の重合状態（間隙の大きさ）の程度
によつては更に休止時間T4を経てクレータ溶接
電流3による比較的短時間T5の第２クレータ溶
接Ｃが行なわれるようにする。このようにするこ
とにより、第３図示のように両ワーク１，１間に
所定の溶接部３が得られる。 That is, as shown in Fig. 2, first the welding current 1
After main welding A is performed for a relatively short time T1 , after a pause time T2 , crater welding B is performed for a relatively short time T3 using a crater welding current 2 ,
Depending on the degree of overlapping state (size of gap) of the works 1, 1, a pause time T4 is further passed, and then second crater welding C is performed for a relatively short time T5 using a crater welding current 3 . By doing so, a predetermined welded portion 3 is obtained between the two works 1, 1 as shown in the third figure.
上記溶接方法は第２クレータ溶接Ｃが行なわれ
ることを除いて先に提案したものと特に異ならな
い。 The welding method described above does not particularly differ from that previously proposed, except that a second crater weld C is performed.
本発明によれば、上記主溶接電流1及びクレ
ータ溶接電流2，3のピーク値及び通電時間並
びに休止時間等の溶接条件が２枚のワーク１，１
の重合状態に見合つた値に自動的に選定されて溶
接が行われるようにした。 According to the present invention, the welding conditions such as the peak values of the main welding current 1 and the crater welding currents 2 and 3 , the energization time, and the rest time are different from that of the two workpieces 1 and 1.
Welding is performed by automatically selecting a value that matches the polymerization state of the material.
これを更に詳述する。第１図に示すように、主
溶接におけるアーク発生開始時には、アークは電
極２と上側のワーク１間に発生し、次いでその熱
により上側のワーク１に穴が明くと、第４図に示
すように電極２と下側のワーク１間にアークが発
生するが、電極２と下側のワーク１間のアーク
V2と、電極２と上側のワーク１間のアーク電圧
1との電圧差は第５図に示すように、２枚のワ
ーク１，１間の隙間に比例する。そこでこの電圧
差2―1を検出し、これに応じて穴明き、肉盛
不足等が生じないような適切な溶接条件に変更す
る。 This will be explained in further detail. As shown in Figure 1, when arc generation starts during main welding, an arc is generated between the electrode 2 and the upper workpiece 1, and then a hole is made in the upper workpiece 1 due to the heat, as shown in Figure 4. As shown, an arc occurs between electrode 2 and lower workpiece 1, but an arc occurs between electrode 2 and lower workpiece 1.
V 2 and the arc voltage between electrode 2 and upper workpiece 1
1 is proportional to the gap between the two workpieces 1, 1, as shown in FIG. Therefore, this voltage difference of 2 - 1 is detected and the welding conditions are changed accordingly to prevent holes, insufficient overlay, etc. from occurring.
例えば、隙間が無い時、隙間が小及び大の時の
電圧差に対応する３つの溶接条件を選定したとす
る。隙間が無い時、クレータ溶接電流のピーク値
及び通電時間をそれぞれ所定値に設定し、隙間が
小さい時は、クレータ溶接電流を上記所定値より
小さくすると共に、第２のクレータ溶接電流を所
定の休止時間を置いてから流し、隙間が大きいと
きは第１と第２のクレータ溶接電流間の休止時間
の長さを隙間が小さい時より長くし、その他は同
じとする。 For example, assume that three welding conditions are selected corresponding to voltage differences when there is no gap, when the gap is small, and when the gap is large. When there is no gap, the peak value and energization time of the crater welding current are set to predetermined values, and when the gap is small, the crater welding current is made smaller than the above predetermined value, and the second crater welding current is set to a predetermined pause. When the gap is large, the pause time between the first and second crater welding currents is made longer than when the gap is small, and other things are the same.
板厚0.6〜1.2mmの２枚のワーク１，１の隙間が
１mm位までの間で変化するとき、主溶接電流は通
電時間0.5〜１秒で200〜250A、休止時間T2は0.5
〜１秒、クレータ溶接電流2は通電時間0.5〜１
秒で100〜150A、休止時間T4は0.3〜１秒、第２
クレータ溶接電流I3は通電時間0.5〜１秒で100〜
150Aの範囲の中から適宜選定する。 When the gap between two workpieces 1 and 1 with plate thicknesses of 0.6 to 1.2 mm changes within about 1 mm, the main welding current is 200 to 250 A with a current application time of 0.5 to 1 second, and a rest time of T 2 of 0.5
~1 second, crater welding current 2 is energizing time 0.5~1
100-150A in seconds, pause time T4 is 0.3-1 seconds, second
Crater welding current I3 is 100 to 100 at energization time of 0.5 to 1 second
Select as appropriate from the 150A range.
第６図は本発明の溶接方法を実施するためのロ
ボツトに搭載されたミグ式アークスポツト溶接装
置のブロツク図を示す。同図に示すように、溶接
電源４はロボツトコントローラ５からの溶接指令
によりワーク１と電極２間に所定の主溶接電流を
流す。このときの上側のワーク１と電極２間のア
ーク電圧1及び下側電極１と電極２間のアーク
電圧2は逐次Ａ―Ｄ変換器６を介してCPU７に
加わり、ここで2―1の電圧差が演算され、こ
の電圧差に対応する溶接条件がメモリ８から続出
される。この溶接条件はインターフエース９、シ
ーケンサ１０及びロボツトコントローラ５を介し
て溶接電源４に加えられ溶接電源４はワーク１，
１の隙間に合つたクレータ電流2，3を休止時
間T2，T4を介して流す。 FIG. 6 shows a block diagram of a MIG type arc spot welding device mounted on a robot for carrying out the welding method of the present invention. As shown in the figure, the welding power source 4 causes a predetermined main welding current to flow between the workpiece 1 and the electrode 2 in response to a welding command from the robot controller 5. At this time, the arc voltage 1 between the upper workpiece 1 and the electrode 2 and the arc voltage 2 between the lower electrode 1 and the electrode 2 are sequentially applied to the CPU 7 via the A-D converter 6, where a voltage of 2 - 1 is applied. The difference is calculated, and welding conditions corresponding to this voltage difference are successively output from the memory 8. These welding conditions are applied to the welding power source 4 via the interface 9, sequencer 10, and robot controller 5, and the welding power source 4
Crater currents 2 and 3 matching the gap 1 are caused to flow through pause times T 2 and T 4 .
かくて、ワーク１，１の隙間が変化してもその
隙間に合つた溶接がワーク１，１に対して行なわ
れ、第３図示のように所定の溶接部３が得られ
る。 In this way, even if the gap between the works 1, 1 changes, welding that matches the gap is performed on the works 1, 1, and a predetermined welded part 3 is obtained as shown in the third figure.
（発明の効果）
本発明は、比較的肉薄の板材からるワークの２
枚を重合してこれに比較的短時間の主溶接を行な
つた後、休止時間を経て比較的短時間のクレータ
溶接を行なうミグ式アークスポツト溶接におい
て、該主溶接の際のアーク発生開始時のアーク電
圧と、電極と下側ワーク間のアーク電圧との差を
検出し、その電圧差に応じた溶接条件によりクレ
ータ溶接を行なうので、ワーク間の隙間が変化し
ても常に溶接品質の優れた溶接部が得られ、何等
手動で調整する必要がないためロボツト等による
溶接に用いることができて作業能率が向上する効
果を有する。(Effects of the invention) The present invention provides two
In MIG type arc spot welding, in which two sheets are superimposed and main welding is performed for a relatively short period of time, and after a rest period, crater welding is performed for a relatively short period of time, arc generation starts during main welding. The difference between the arc voltage of Since a well-defined welded part is obtained and there is no need for any manual adjustment, it can be used for welding by robots, etc., and has the effect of improving work efficiency.
第１図乃至第５図はいずれも本発明方法の１例
の説明図、第６図は本発明方法の実施に使用され
るミグ式アークスポツト溶接装置のブロツク線図
である。
１…ワーク、２…電極、３…溶接部。
1 to 5 are explanatory diagrams of one example of the method of the present invention, and FIG. 6 is a block diagram of a MIG type arc spot welding apparatus used to carry out the method of the present invention. 1...Workpiece, 2...Electrode, 3...Welding part.
Claims (1)
合してこれに比較的短時間の主溶接を行なつた
後、休止時間を経て比較的短時間のクレータ溶接
を行なうミグ式アークスポツト溶接方法におい
て、該主溶接の際のアーク発生開始時のアーク電
圧と、電極と下側ワーク間のアーク電圧との差を
検出し、その電圧差に応じた溶接条件によりクレ
ータ溶接を行なうことを特徴とするアークスポツ
ト溶接方法。1 A MIG arc spot welding method in which two workpieces made of relatively thin plates are superimposed and subjected to main welding for a relatively short period of time, and then, after a rest period, crater welding is performed for a relatively short period of time. , the difference between the arc voltage at the start of arc generation during main welding and the arc voltage between the electrode and the lower workpiece is detected, and crater welding is performed under welding conditions according to the voltage difference. arc spot welding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28117484A JPS61159271A (en) | 1984-12-29 | 1984-12-29 | Arc spot welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28117484A JPS61159271A (en) | 1984-12-29 | 1984-12-29 | Arc spot welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61159271A JPS61159271A (en) | 1986-07-18 |
| JPS649111B2 true JPS649111B2 (en) | 1989-02-16 |
Family
ID=17635379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28117484A Granted JPS61159271A (en) | 1984-12-29 | 1984-12-29 | Arc spot welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61159271A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2952468B2 (en) * | 1995-10-05 | 1999-09-27 | 株式会社ニフコ | Hub mounting structure for information disks |
-
1984
- 1984-12-29 JP JP28117484A patent/JPS61159271A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61159271A (en) | 1986-07-18 |
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