JP2638413B2 - Resistance welding method - Google Patents
Resistance welding methodInfo
- Publication number
- JP2638413B2 JP2638413B2 JP5002556A JP255693A JP2638413B2 JP 2638413 B2 JP2638413 B2 JP 2638413B2 JP 5002556 A JP5002556 A JP 5002556A JP 255693 A JP255693 A JP 255693A JP 2638413 B2 JP2638413 B2 JP 2638413B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode tip
- welded
- electrode
- tip
- rotation
- 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 - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、被溶接材料を挟圧する
一対の電極チップ間の通電によってこの被溶接材料を溶
接する抵抗溶接方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistance welding method for welding a material to be welded by energizing a pair of electrode tips for pressing the material to be welded.
【０００２】[0002]
【背景技術】一対の電極チップ間に通電して被溶接材料
を溶接する抵抗溶接作業は、従来、被溶接材料の両側に
配設される各電極チップを被溶接材料に対して直角と
し、球面状となっている電極チップ先端の中央部を被溶
接材料に接触させることにより行われていた。この従来
の抵抗溶接作業によると、電極チップの材料である銅系
金属と被溶接材料の例えば亜鉛等によるメッキ材料との
合金が、溶接作業が行われるたびに、電極チップ先端の
接触部に溜り、溶接作業回数が多くなると、この合金は
電極チップ先端の接触部の外側へ次第に***状となって
拡大成長する。この結果、電極チップと被溶接材料との
接触面積が大きくなって電気抵抗が低下することにな
り、このため、電極チップ先端をもとの形状に整形する
ドレッシング作業を頻繁に行わなければならないという
問題があった。2. Description of the Related Art Conventionally, a resistance welding operation in which a current is applied between a pair of electrode tips to weld a material to be welded is performed by making each electrode tip disposed on both sides of the material to be welded at right angles to the material to be welded, and forming a spherical surface. This has been done by bringing the center of the tip of the electrode tip into contact with the material to be welded. According to this conventional resistance welding operation, an alloy of a copper-based metal which is a material of an electrode tip and a plating material such as zinc, which is a material to be welded, accumulates at a contact portion at the tip of the electrode tip every time welding operation is performed. When the number of welding operations increases, the alloy gradually grows to the outside of the contact portion at the tip of the electrode tip and grows. As a result, the contact area between the electrode tip and the material to be welded becomes large, and the electric resistance decreases. For this reason, dressing work for shaping the tip of the electrode tip into the original shape must be performed frequently. There was a problem.
【０００３】このような問題を解決するため、特開平２
−２２０７８４号では、電極チップを被溶接材料に対す
る直角方向から傾斜させ、かつ、所定回数の溶接作業が
終了するたびに電極チップを電極チップ中心軸を中心に
一定角度ずつ間欠回転させている。図４は、この従来技
術における電極チップ３１の球面状の先端３１Ａを示す
平面図である。被溶接材料との接触部３２は、電極チッ
プ３１が被溶接材料に対する直角方向から傾斜している
ため、中央部３１Ｂからずれており、また、電極チップ
３１の角度βずつの間欠回転により、接触部３２は中央
部３１Ｂを中心に等角度間隔で複数個できる。電極チッ
プ３１の一回の間欠回転のたびに行われる所定回数の溶
接作業のため、各接触部３２の円状の内側部分には前記
合金の層ができるとともに、各接触部３２の周辺には前
記合金による***部３３が生ずる。To solve such a problem, Japanese Patent Laid-Open No.
In Japanese Patent No. 220720, the electrode tip is inclined from a direction perpendicular to the material to be welded, and the electrode tip is intermittently rotated at a fixed angle about the electrode tip center axis each time a predetermined number of welding operations are completed. FIG. 4 is a plan view showing a spherical tip 31A of the electrode tip 31 in the conventional technique. The contact portion 32 with the material to be welded is displaced from the central portion 31B because the electrode tip 31 is inclined from a direction perpendicular to the material to be welded. A plurality of portions 32 can be formed at equal angular intervals around the center portion 31B. Because of the predetermined number of welding operations performed each time the electrode tip 31 is intermittently rotated, the alloy layer is formed on the circular inner portion of each contact portion 32, and the periphery of each contact portion 32 is formed. A raised portion 33 is formed by the alloy.
【０００４】この従来技術によると、中央部３１Ｂを中
心とした円周方向に互いに隣接する接触部３２におい
て、次回の所定回数の溶接作業時における接触部３２が
前回の所定回数の溶接作業時に生じた***部３３の一部
３３Ａと重なり合うため、この一部３３Ａにおいて***
部３３が接触部３２で押し潰されることになり、すなわ
ち、この一部３３Ａにおいて電極チップ３１のドレッシ
ング作業を行いながら溶接作業を行っているのと同じに
なり、作業者が行わなければならない電極チップ３１の
ドレッシング作業の回数を減少させることができる。According to this prior art, in the contact portions 32 adjacent to each other in the circumferential direction around the center portion 31B, the contact portions 32 at the time of the next predetermined number of welding operations are generated during the previous predetermined number of welding operations. Since the raised portion 33 overlaps with the portion 33A of the raised portion 33, the raised portion 33 is crushed by the contact portion 32 at the portion 33A, that is, the welding operation is performed while the dressing operation of the electrode tip 31 is performed at the portion 33A. And the number of dressing operations of the electrode tip 31 that must be performed by the operator can be reduced.
【０００５】[0005]
【発明が解決しようとする課題】しかし、この従来技術
において、電極チップ３１の間欠回転の角度βは３０
度，４５度，６０度であった。これによると、電極チッ
プ３１の間欠回転が所定回数（図４ではβは６０度であ
るため、６回）に達すると、次の回転では接触部３２の
位置は最初の位置に戻り、この後、各接触部３２の位置
は前と同じ位置を順次移動する。However, in this prior art, the angle β of the intermittent rotation of the electrode tip 31 is 30 degrees.
Degrees, 45 degrees, and 60 degrees. According to this, when the number of intermittent rotations of the electrode tip 31 reaches a predetermined number (6 in FIG. 4 because β is 60 degrees), the position of the contact portion 32 returns to the initial position in the next rotation, and thereafter, The position of each contact portion 32 sequentially moves at the same position as before.
【０００６】このため、この従来技術では、各接触部３
２の***部３３において押し潰される部分は常に同じ部
分３３Ａであり、電極チップ３１のドレッシング作業と
同じ作業を期待できる箇所は同じで、各接触部３２の内
側部分、および***部３３の一部３３Ａ以外の部分では
ドレッシング作業を期待できないため、これらの部分で
前記合金が次第に溜まることになり、このため、電極チ
ップ３１に行わなければならないドレッシング作業の回
数をそれほど多く減らすことはできないという問題があ
った。For this reason, in this prior art, each contact portion 3
The squashed portion of the second raised portion 33 is always the same portion 33 </ b> A, and the same portion where the same operation as the dressing operation of the electrode tip 31 can be expected is the same. Since the dressing work cannot be expected in portions other than 33A, the alloy gradually accumulates in these portions. Therefore, the number of dressing operations to be performed on the electrode tip 31 cannot be reduced so much. there were.
【０００７】本発明の目的は、電極チップの間欠回転に
より電極チップ先端の中央部の回りを接触部が１回転し
たとき、接触部の位置を最初の位置からずらせることが
でき、このため、各接触部の内側部分や***部の新たな
部分についてドレッシング作業と同様な作業が行われ、
このドレッシング作業と同様な作業を広い範囲に亘って
行いながら溶接作業を行え、従来技術よりもドレッシン
グ作業の回数を少なくできる抵抗溶接方法を提供すると
ころにある。An object of the present invention is to make it possible to shift the position of the contact portion from the initial position when the contact portion makes one rotation around the center of the tip of the electrode tip due to the intermittent rotation of the electrode tip. The same work as the dressing work is performed on the inner part of each contact part and the new part of the raised part,
An object of the present invention is to provide a resistance welding method capable of performing a welding operation while performing the same operation as the dressing operation over a wide range, and reducing the number of times of the dressing operation compared to the related art.
【０００８】[0008]
【課題を解決するための手段】本発明の第１発明は、一
対の電極チップを被溶接材料の両側に配設し、これらの
電極チップのうち少なくとも一方を前記被溶接材料に対
する直角方向から傾斜させ、一対の電極チップ間に通電
して被溶接材料を抵抗溶接するとともに、所定回数の溶
接作業が終了するたびに、被溶接材料に対する直角方向
から傾斜させた前記電極チップを電極チップ中心軸を中
心に間欠回転させる抵抗溶接方法において、１回転を３
６０度とした間欠回転の回転角度を、この回転角度で３
６０を除したときの値が小数点以下の端数を有するもの
としたことを特徴とするものである。According to a first aspect of the present invention, a pair of electrode tips is provided on both sides of a material to be welded, and at least one of the electrode tips is inclined from a direction perpendicular to the material to be welded. Then, a current is applied between the pair of electrode tips to resistance-weld the material to be welded, and each time a predetermined number of welding operations are completed, the electrode tip, which is inclined from a direction perpendicular to the material to be welded, is set to the center axis of the electrode tip. In the resistance welding method of intermittent rotation at the center, one rotation is 3
The rotation angle of the intermittent rotation at 60 degrees is 3
It is characterized in that the value obtained by dividing 60 has a fraction below the decimal point.
【０００９】すなわち、第１発明では、電極チップの間
欠回転の回転角度（１回転を３６０度として表す、以下
の記載において同様）は、例えば６３度のように、この
回転角度で３６０（１回転の角度）を除したときの値が
整数とならずに小数点以下の端数を有するものとされ、
この回転角度は例えば６６度、４８度、３３度等でもよ
い。That is, in the first invention, the rotation angle of the intermittent rotation of the electrode tip (one rotation is represented as 360 degrees,
The same applies in the description of the above) , for example, a value obtained by dividing 360 (the angle of one rotation) by this rotation angle is not an integer but has a fraction below the decimal point, such as 63 degrees,
This rotation angle may be, for example, 66 degrees, 48 degrees, 33 degrees, or the like.
【００１０】本発明の第２発明は、一対の電極チップを
被溶接材料の両側に配設し、これらの電極チップのうち
少なくとも一方を被溶接材料に対する直角方向から傾斜
させ、一対の電極チップ間に通電して被溶接材料を抵抗
溶接するとともに、所定回数の溶接作業が終了するたび
に、被溶接材料に対する直角方向から傾斜させた電極チ
ップを電極チップ中心軸を中心に間欠回転させる抵抗溶
接方法において、この間欠回転の回転角度を乱数制御に
より順次決定されたものとしたことを特徴とするもので
ある。According to a second aspect of the present invention, a pair of electrode tips is provided on both sides of a material to be welded, and at least one of the electrode tips is inclined from a direction perpendicular to the material to be welded. Resistance welding method for welding the material to be welded by applying current to the electrode tip and intermittently rotating the electrode tip inclined from a direction perpendicular to the material to be welded about the electrode tip center axis each time a predetermined number of welding operations are completed. Wherein the rotation angle of the intermittent rotation is sequentially determined by random number control.
【００１１】この第２発明において、電極チップの間欠
回転の回転角度を順次決定する乱数制御装置は電極チッ
プを間欠回転させる制御装置の内部に設けてもよく、あ
るいはこの制御装置の外部のコンピュータ等によるコン
トローラとして設けてもよい。In the second invention, the random number control device for sequentially determining the rotation angle of the intermittent rotation of the electrode tip may be provided inside the control device for intermittently rotating the electrode tip, or a computer or the like external to the control device. May be provided as a controller.
【００１２】[0012]
【作用】第１発明では、電極チップの間欠回転の回転角
度は、この回転角度で３６０を除したときの値が整数と
小数点以下の端数との和となるため、電極チップの一定
角度ずつの間欠回転により電極チップ先端の中央部の回
りを接触部が１回転したとき、接触部の位置が最初の位
置と同じにならず、この位置からずれるため、接触部の
１回転後は各接触部の内側部分や***部の新たな部分に
ついてドレッシング作業と同様な作業が行われ、このド
レッシング作業と同様な作業が広い範囲にわたって行わ
れるため、ドレッシング作業の回数を従来技術よりも少
なくできる。According to the first aspect of the present invention, the rotation angle of the intermittent rotation of the electrode tip is obtained by dividing 360 by the rotation angle, which is the sum of an integer and a fraction below the decimal point. When the contact portion makes one rotation around the center of the tip of the electrode tip due to the intermittent rotation, the position of the contact portion does not become the same as the initial position and deviates from this position. The same operation as the dressing operation is performed on the inner portion of the slab and a new portion of the raised portion, and the operation similar to the dressing operation is performed over a wide range.
【００１３】第２発明では、電極チップの間欠回転の回
転角度は乱数制御により順次決定されたものとなるた
め、この第２発明でも電極チップの間欠回転により電極
チップ先端の中央部の回りを接触部が１回転したとき、
接触部の位置が最初の位置と同じにならないことにな
り、第１発明と同じ作用効果を期待できる。In the second invention, since the rotation angle of the intermittent rotation of the electrode tip is sequentially determined by random number control, the second invention also makes contact around the center of the tip of the electrode tip by the intermittent rotation of the electrode tip. When the part makes one turn,
Since the position of the contact portion does not become the same as the initial position, the same operation and effect as the first invention can be expected.
【００１４】[0014]
【実施例】以下に本発明の一実施例を添付図面に基づい
て説明する。図１は本実施例に係る抵抗溶接方法を実施
するために使用する抵抗溶接装置１を示す。装置本体２
には水平方向に延びるアーム部３，４が設けられ、上側
のアーム部３の先端には上下方向に伸縮動するシリンダ
５を介して電極チップ保持具６が取り付けられ、下側の
アーム部４の先端には電極チップ保持具７が直接取り付
けられている。各電極チップ保持具６，７には上下の電
極チップ８が保持され、これらの電極チップ８は図示し
ない保持装置で保持されて順次供給される被溶接材料９
の上下両側に設けられている。An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a resistance welding apparatus 1 used for carrying out the resistance welding method according to the present embodiment. Device body 2
Are provided with arm portions 3 and 4 extending in the horizontal direction. An electrode tip holder 6 is attached to the tip of the upper arm portion 3 via a cylinder 5 which expands and contracts in the vertical direction. The electrode tip holder 7 is directly attached to the tip of the. Upper and lower electrode tips 8 are held by the electrode tip holders 6 and 7, and these electrode tips 8 are held by a holding device (not shown) and sequentially supplied with a material 9 to be welded.
Are provided on both upper and lower sides.
【００１５】図２の通り、アルミニウムなどの軽金属材
料あるいは鋼板製の被溶接材料９は上下に２枚重ねら
れ、上側の電極チップ８がシリンダ５の伸縮動で上下動
することにより、これらの被溶接材料９が上下一対の電
極チップ８で挟圧され、この挟圧時に一対の電極チップ
８間に通電することにより、被溶接材料９同士は抵抗溶
接される。As shown in FIG. 2, a light metal material such as aluminum or a material 9 to be welded made of a steel plate is vertically stacked two times. The welding material 9 is sandwiched between the pair of upper and lower electrode tips 8, and when current is applied between the pair of electrode tips 8 during this sandwiching, the materials 9 to be welded are resistance-welded to each other.
【００１６】図２に示されている通り、電極チップ保持
具６，７による電極チップ８の保持は、保持具６，７に
取り付けられた筒状のホルダ部材１０に電極チップ８を
回転自在に挿入することにより行われ、このため、電極
チップ８は電極チップ中心軸Ｎを中心に回転自在となっ
ている。ホルダ部材１０の端部には電極チップ８を中心
軸Ｎを中心に回転させるための例えばベベルギヤによる
回転機構１１が設けられ、この回転機構１１には図１で
示したサーボモータ１２の駆動力がフレキシブルワイヤ
１３を介して伝達されるようになっている。サーボモー
タ１２にはモータ駆動回路１４を介して制御装置１５が
接続され、さらに、制御装置１５には入力装置１６が接
続されている。As shown in FIG. 2, when the electrode tips 8 are held by the electrode tip holders 6, 7, the electrode tips 8 are rotatably mounted on a cylindrical holder member 10 attached to the holders 6, 7. The electrode tip 8 is rotatable about the electrode tip center axis N. At the end of the holder member 10, there is provided a rotation mechanism 11 using, for example, a bevel gear for rotating the electrode tip 8 about the central axis N. The driving force of the servo motor 12 shown in FIG. The data is transmitted via the flexible wire 13. A control device 15 is connected to the servomotor 12 via a motor drive circuit 14, and an input device 16 is connected to the control device 15.
【００１７】入力装置１６から電極チップ８を一定角度
α（例えば６３度）ずつ間欠回転させるための信号が制
御装置１５の記憶部に入力され、制御装置１５はこの記
憶部に記憶された信号に基づいてモータ駆動回路１４を
介してサーボモータ１２を駆動させる。このため、電極
チップ８は一定角度αずつ中心軸Ｎを中心に間欠回転す
るようになっている。A signal for intermittently rotating the electrode tip 8 by a constant angle α (for example, 63 degrees) from the input device 16 is input to the storage unit of the control device 15, and the control device 15 converts the signal stored in the storage unit into a signal. The servo motor 12 is driven via the motor drive circuit 14 based on the above. For this reason, the electrode tip 8 rotates intermittently about the central axis N by a constant angle α.
【００１８】図２の通り、電極チップ８を回転自在に保
持するホルダ部材１０は被溶接材料９に対する直角方向
から角度θ傾いており、このため、電極チップ８も角度
θ傾いている。As shown in FIG. 2, the holder member 10 for rotatably holding the electrode tip 8 is inclined at an angle θ from a direction perpendicular to the material 9 to be welded. Therefore, the electrode tip 8 is also inclined at an angle θ.
【００１９】以上において電極チップ８の間欠回転の回
転角度αは、この回転角度αで３６０を除したときの値
が整数と小数点以下の端数との和となるように設定され
ている。In the above, the rotation angle α of the intermittent rotation of the electrode tip 8 is set such that the value obtained by dividing 360 by the rotation angle α is the sum of an integer and a fraction below the decimal point.
【００２０】電極チップ８の一定角度αずつの間欠回転
は非溶接時、すなわち、上側の電極チップ８がシリンダ
５で被溶接材料９から離れている時に行われ、電極チッ
プ８が一定角度αの間欠回転を行った後、上側の電極チ
ップ８はシリンダ５で下降して下側の電極チップ８と共
に被溶接材料９を溶接する。そして、シリンダ５の伸縮
動の繰り返しによって上下一対の電極チップ８による所
定回数の溶接作業が終了した後、上側の電極チップ８は
シリンダ５で上昇し、次いで、再び一定角度αの間欠回
転を行う。The intermittent rotation of the electrode tip 8 at a constant angle α is performed at the time of non-welding, that is, when the upper electrode tip 8 is separated from the material 9 to be welded by the cylinder 5, and the electrode tip 8 is fixed at a constant angle α. After the intermittent rotation, the upper electrode tip 8 is lowered by the cylinder 5 to weld the material 9 to be welded together with the lower electrode tip 8. Then, after a predetermined number of welding operations by the pair of upper and lower electrode tips 8 are completed by repeating the expansion and contraction of the cylinder 5, the upper electrode tip 8 is raised by the cylinder 5 and then performs the intermittent rotation of the constant angle α again. .
【００２１】図３は、以上のように溶接作業が繰り返さ
れた後における電極チップ８の先端８Ａの平面図であ
る。電極チップ８は、前述の通り、被溶接材料９に対す
る直角方向から角度θ傾いているため、先端８Ａには被
溶接材料９との接触部１７が先端８Ａの中央部８Ｂから
ずれて生じ、かつ、この接触部１７は電極チップ８の一
定角度αずつの間欠回転により中央部８Ｂの回りに等角
度間隔でできる。図３において、Ａ1,Ａ2,Ａ3,…は、一
定角度αずつの間欠回転により先端８Ａに生ずる各接触
部１７の中心を示す。FIG. 3 is a plan view of the tip 8A of the electrode tip 8 after the welding operation has been repeated as described above. As described above, since the electrode tip 8 is inclined at an angle θ from a direction perpendicular to the material 9 to be welded, the contact portion 17 with the material 9 to be welded is formed at the tip 8A so as to be shifted from the central portion 8B of the tip 8A, and The contact portions 17 are formed at equal angular intervals around the central portion 8B by intermittent rotation of the electrode tip 8 at a constant angle α. In FIG. 3, A 1 , A 2, A 3, ... Indicate the centers of the contact portions 17 generated at the tip 8A due to the intermittent rotation of the fixed angle α.
【００２２】電極チップ７の一定角度αずつの間欠回転
の間に行われる所定回数の溶接作業により、各接触部１
７の円状の内側部分には、電極チップ８の材料である銅
系金属と被溶接材料９の例えば亜鉛等によるメッキ材料
との合金による層ができ、また、各接触部１７の周辺に
はこの合金による***部１８ができる。Each contact portion 1 is formed by a predetermined number of welding operations performed during the intermittent rotation of the electrode tip 7 at a constant angle α.
7, a layer made of an alloy of a copper-based metal, which is the material of the electrode tip 8, and a plating material such as zinc, for example, of the material 9 to be welded, is formed around the contact portion 17. A ridge 18 is made of this alloy.
【００２３】中央部８Ｂを中心とした円周方向に互いに
隣接する接触部１７において、Ａ1〜Ａ6 を中心とする
初めの各接触部１７では、前回の所定回数の溶接作業時
に接触部１７の周囲に生じた***部１８の一部が次回の
所定回数の溶接作業時における接触部１７で押し潰され
る。すなわち図３では、Ｂ1 は、Ａ1 を中心とする接触
部１７の周囲の***部１８がＡ2 を中心とする接触部１
７で押し潰される部分であり、Ｂ2 は、Ａ2 を中心とす
る接触部１７の周囲の***部１８がＡ3 を中心とする接
触部１７で押し潰される部分であり、溶接作業がＡ6 を
中心とする接触部１７まで行われることにより、この押
し潰し部分はＢ5 まで生ずる。このため、溶接作業はド
レッシング作業と同様な作業をＢ1 〜Ｂ5 について行い
ながら実施されることになり、これらのＢ1 〜Ｂ5 にお
ける前記合金による盛上りをなくすことができる。In the contact portions 17 adjacent to each other in the circumferential direction with the center 8B as the center, the first contact portions 17 with the centers of A 1 to A 6 as the contact portions 17 during the previous predetermined number of welding operations. Of the raised portion 18 generated around the contact portion 17 is crushed by the contact portion 17 during the next predetermined number of welding operations. That is, in FIG. 3, B 1 indicates that the raised portion 18 around the contact portion 17 centered on A 1 has the contact portion 1 centered on A 2.
7, B 2 is a portion where the raised portion 18 around the contact portion 17 centered on A 2 is crushed by the contact portion 17 centered on A 3 , and the welding operation is performed by A by being performed 6 to a contact portion 17 having a center, the crushing part is caused to B 5. Therefore, welding operation will be carried out while the B 1 .about.B 5 the dressing operation and similar operations, it is possible to eliminate the protuberance by the alloy in these B 1 ~B 5.
【００２４】Ａ6 を中心とする接触部１７による所定回
数の溶接作業後、電極チップ８に一定角度αの間欠回転
を行わせ、そして、次のＡ7 を中心とする接触部１７に
よる所定回数の溶接作業を行った時には、間欠回転の回
転角度αは、この回転角度αで３６０を除したときの値
が整数と小数点以下の端数との和となるように設定され
ているため、この時の接触部１７の中心Ａ7 は最初の所
定回数の溶接作業時での接触部１７の中心Ａ1 からずれ
ることになる。このため、Ａ7 を中心とする接触部１７
による所定回数の溶接作業を行った時には、このＡ7 を
中心とする接触部１７によってＡ6 を中心とする接触部
１７の周囲の***部１８の一部Ｂ6 が押し潰されるとと
もに、Ａ1 を中心とする接触部１７の内側部分およびＡ
1 を中心とする接触部１７の周囲の***部１８の一部Ｃ
1 も押し潰される。After a predetermined number of welding operations by the contact portion 17 centering on A 6 , the electrode tip 8 is intermittently rotated by a predetermined angle α, and the next predetermined number of times by the contact portion 17 centering on A 7. Since the rotation angle α of the intermittent rotation is set such that the value obtained by dividing 360 by the rotation angle α is the sum of the integer and the fraction below the decimal point, The center A 7 of the contact portion 17 is shifted from the center A 1 of the contact portion 17 during the first predetermined number of welding operations. Therefore, the contact portion 17 around the A 7
When performing the welding operation a predetermined number by, together with part B 6 of the raised portion 18 of the periphery of the contact portion 17 around the A 6 is crushed by the contact portion 17 centered on the A 7, A 1 And the inner part of the contact portion 17 centered on
Part C of the raised portion 18 around the contact portion 17 centered on 1
1 is also crushed.
【００２５】これらの内側部分およびＣ1 は、Ａ2 を中
心とする接触部１７がＡ1 を中心とする接触部１７の周
囲の***部１８を押し潰した部分Ｂ1 と異なっており、
すなわち、一定角度αずつの間欠回転により電極チップ
先端８Ａの中央部８Ｂの回りを接触部１７が１回転する
と、新たな部分の押し潰しが行われ、次のＡ8 を中心と
する接触部１７による所定回数の溶接作業が行われる
と、Ａ2 を中心とする接触部１７の内側部分およびＣ1
と同様な部分Ｃ2 が押し潰される。The inner portion and C 1 are different from the portion B 1 in which the contact portion 17 centered on A 2 crushes the raised portion 18 around the contact portion 17 centered on A 1 .
That is, a constant when the angle electrodes by the intermittent rotation of each α the tip end 8A contact portion 17 around the central portion 8B of rotation 1, crush the new parts is performed, the contact portions 17 centered on the following A 8 Is performed a predetermined number of times, the inner portion of the contact portion 17 centered on A 2 and C 1
Crushed similar parts C 2 and.
【００２６】以上のように本実施例によれば、電極チッ
プ８の一定角度αずつの間欠回転によって電極チップ先
端８Ａの中央部８Ｂの回りを接触部１７が１回転した後
は、接触部１７の中心位置が最初の所定回数の溶接作業
時における接触部１７の中心位置と一致せず、この位置
からずれるため、引き続いて一定角度αの間欠回転を行
って所定回数の溶接作業を始めると、新たな部分の押し
潰しを行うことができ、ドレッシング作業と同様な作業
を広い範囲に亘って行いながら溶接作業を行えるため、
従来技術よりもドレッシング作業の必要回数を少なくで
きる。As described above, according to the present embodiment, after the contact portion 17 makes one rotation around the central portion 8B of the tip 8A of the electrode tip by the intermittent rotation of the electrode tip 8 at a constant angle α, the contact portion 17 The center position of does not coincide with the center position of the contact portion 17 at the time of the first predetermined number of welding operations, and deviates from this position. Therefore, when the intermittent rotation of the constant angle α is subsequently performed to start the predetermined number of welding operations, New parts can be crushed, and welding work can be performed while performing work similar to dressing work over a wide range.
The required number of dressing operations can be reduced as compared with the prior art.
【００２７】以上説明した実施例では電極チップ８の間
欠回転の回転角度は一定角度αであったが、この回転角
度を乱数制御により順次決定される回転角度としてもよ
い。すなわち、電極チップ８による所定回数の溶接作業
のたびに溶接チップ８の回転角度を乱数制御によってラ
ンダムに決定する。これによっても、電極チップ８の間
欠回転で電極チップ先端８Ａの中央部８Ｂの回りを接触
部１７が１回転した後は、接触部１７の中心位置を最初
の所定回数の溶接作業等における接触部１７の中心位置
からずらせることができ、そして、これ以後、引き続い
て新たな部分の押し潰しを行うことができ、前記実施例
と同じ作用効果を期待できる。In the embodiment described above, the rotation angle of the intermittent rotation of the electrode tip 8 is a fixed angle α, but this rotation angle may be a rotation angle sequentially determined by random number control. That is, the rotation angle of the welding tip 8 is randomly determined by random number control every time a predetermined number of welding operations are performed by the electrode tip 8. Even after this, after the contact portion 17 makes one rotation around the central portion 8B of the tip 8A of the electrode tip by the intermittent rotation of the electrode tip 8, the center position of the contact portion 17 is changed to the contact portion in the first predetermined number of welding operations or the like. 17 can be shifted from the center position, and thereafter, a new portion can be continuously crushed, and the same operation and effect as in the above embodiment can be expected.
【００２８】なお、電極チップ８の間欠回転の回転角度
を順次決定する乱数制御装置は、電極チップを間欠回転
させるための制御装置の内部に設けてもよく、また、こ
の制御装置の外部に設けて制御装置と接続してもよい。The random number control device for sequentially determining the rotation angle of the intermittent rotation of the electrode tip 8 may be provided inside a control device for intermittently rotating the electrode tip, or provided outside the control device. May be connected to the control device.
【００２９】以上説明した各実施例では、被溶接材料９
の上下両側に配設される一対の電極チップ８の両方を被
溶接材料９に対する直角方向から傾け、かつ、これらを
間欠回転させたが、これを一対の電極チップの一方だけ
に行わせてもよい。In each embodiment described above, the material to be welded 9
Both of the pair of electrode tips 8 disposed on both the upper and lower sides are tilted from a direction perpendicular to the material 9 to be welded, and they are intermittently rotated. However, this may be performed by only one of the pair of electrode tips. Good.
【００３０】また、電極チップを一定角度ずつ間欠回転
させる機構は前記実施例のものに限定されず、例えば電
極チップ自体、あるいはこれと接続された部材にウォー
ムホイールを設け、このウォームホイールで電極チップ
を回転させるようにしてもよく、この電極回転機構は公
知のものを採用できる。The mechanism for intermittently rotating the electrode tip at a constant angle is not limited to that of the above-described embodiment. For example, a worm wheel is provided on the electrode tip itself or a member connected thereto, and the worm wheel is used for the worm wheel. May be rotated, and a known mechanism can be adopted as the electrode rotating mechanism.
【００３１】[0031]
【発明の効果】本発明によれば、電極チップの間欠回転
によって電極チップ先端の中央部の回りを接触部が１回
転したとき、接触部の中心位置が最初の所定回数の溶接
作業時における接触部の中心位置からずれるため、この
後、引き続いて行う溶接作業によって新たな部分の押し
潰しを行うことができ、ドレッシング作業と同様な作業
を広い範囲に亘って行いながら溶接作業を行えるため、
従来技術よりもドレッシング作業の必要回数を少なくで
き、溶接作業全体の作業効率を高めることができる。According to the present invention, when the contact portion makes one rotation around the center of the tip of the electrode tip due to the intermittent rotation of the electrode tip, the center position of the contact portion becomes the first predetermined number of contacts during welding work. Since it is displaced from the center position of the part, a new part can be crushed by a subsequent welding operation, and the welding operation can be performed while performing the same operation as the dressing operation over a wide range.
The required number of dressing operations can be reduced as compared with the prior art, and the work efficiency of the entire welding operation can be increased.
【図１】本発明に係る抵抗溶接方法の一実施例を実施す
るために使用する抵抗溶接装置及びその電極チップの駆
動装置を示した図である。FIG. 1 is a view showing a resistance welding apparatus used for carrying out an embodiment of a resistance welding method according to the present invention and a driving device of an electrode tip thereof.
【図２】図１の要部拡大図である。FIG. 2 is an enlarged view of a main part of FIG.
【図３】溶接作業が行われた電極チップの先端の平面図
である。FIG. 3 is a plan view of a tip end of an electrode tip on which a welding operation has been performed.
【図４】従来技術における電極チップの先端を示す図３
と同様な図である。FIG. 4 shows the tip of an electrode tip in the prior art.
FIG.
１ 抵抗溶接装置 ５ シリンダ ６，７ 電極チップ保持具 ８ 電極チップ ８Ａ 先端 ８Ｂ 中央部 ９ 被溶接材料 １１ 回転機構 １７ 接触部 １８ 電極チップの材料と被溶接材料のメッキ材料との
合金による***部 α 電極チップの間欠回転の回転角度 θ 被溶接材料に対する直角方向からの電極チップの傾
斜角度 Ｎ 電極チップ中心軸DESCRIPTION OF SYMBOLS 1 Resistance welding apparatus 5 Cylinder 6, 7 Electrode tip holder 8 Electrode tip 8A Tip 8B Central part 9 Material to be welded 11 Rotation mechanism 17 Contact part 18 Ridge part by alloy of electrode material and plating material of material to be welded α Rotation angle of the intermittent rotation of the electrode tip θ Angle of inclination of the electrode tip from the direction perpendicular to the material to be welded N Central axis of the electrode tip
───────────────────────────────────────────────────── フロントページの続き (72)発明者 斉藤 享 千葉県富津市新富20−１ 新日本製鐵株 式会社 技術開発本部内 (56)参考文献 特開 平４−75788（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Satoshi Saito 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (56) References JP-A-4-75788 (JP, A)
Claims (2)
極チップのうち少なくとも一方を前記被溶接材料に対す
る直角方向から傾斜させ、前記一対の電極チップ間に通
電して前記被溶接材料を抵抗溶接するとともに、所定回
数の溶接作業が終了するたびに、前記被溶接材料に対す
る直角方向から傾斜させた前記電極チップを電極チップ
中心軸を中心に間欠回転させる抵抗溶接方法において、
１回転を３６０度とした前記間欠回転の回転角度を、こ
の回転角度で３６０を除したときの値が小数点以下の端
数を有するものとしたことを特徴とする抵抗溶接方法。At least one of a pair of electrode tips disposed on both sides of a material to be welded is inclined from a direction perpendicular to the material to be welded, and a current is supplied between the pair of electrode tips so as to remove the material to be welded. In addition to the resistance welding, each time a predetermined number of welding operations is completed, in the resistance welding method of intermittently rotating the electrode tip inclined from a direction perpendicular to the material to be welded around an electrode tip center axis,
A resistance welding method, characterized in that a value obtained by dividing 360 by the rotation angle of the intermittent rotation with one rotation being 360 degrees has a fraction below a decimal point.
極チップのうち少なくとも一方を前記被溶接部材に対す
る直角方向から傾斜させ、前記一対の電極チップ間に通
電して前記被溶接材料を抵抗溶接するとともに、所定回
数の溶接作業が終了するたびに、前記被溶接材料に対す
る直角方向から傾斜させた前記電極チップを電極チップ
中心軸を中心に間欠回転させる抵抗溶接方法において、
前記間欠回転の回転角度を乱数制御により順次決定され
たものとしたことを特徴とする抵抗溶接方法。2. A method according to claim 1, wherein at least one of a pair of electrode tips disposed on both sides of the member to be welded is inclined from a direction perpendicular to the member to be welded, and a current is supplied between the pair of electrode tips to remove the material to be welded. In addition to the resistance welding, each time a predetermined number of welding operations is completed, in the resistance welding method of intermittently rotating the electrode tip inclined from a direction perpendicular to the material to be welded around an electrode tip center axis,
A resistance welding method, wherein the rotation angle of the intermittent rotation is sequentially determined by random number control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5002556A JP2638413B2 (en) | 1993-01-11 | 1993-01-11 | Resistance welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5002556A JP2638413B2 (en) | 1993-01-11 | 1993-01-11 | Resistance welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06198455A JPH06198455A (en) | 1994-07-19 |
| JP2638413B2 true JP2638413B2 (en) | 1997-08-06 |
Family
ID=11532658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5002556A Expired - Lifetime JP2638413B2 (en) | 1993-01-11 | 1993-01-11 | Resistance welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2638413B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4920404B2 (en) * | 2006-12-28 | 2012-04-18 | アスモ株式会社 | Joining apparatus, article joining method, and commutator manufacturing method |
| RU2685928C2 (en) * | 2015-03-30 | 2019-04-23 | Ниппон Стил Энд Сумитомо Метал Корпорейшн | Method of point welding |
| JP5853113B1 (en) * | 2015-03-31 | 2016-02-09 | 株式会社川村金属製作所 | Welding apparatus and welding method |
| NL2022864B1 (en) * | 2019-04-04 | 2020-10-08 | Awl Techniek B V | Method for resistance welding and resistance welding apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747222B2 (en) * | 1989-07-26 | 1995-05-24 | 新日本製鐵株式会社 | Resistance welding equipment |
-
1993
- 1993-01-11 JP JP5002556A patent/JP2638413B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06198455A (en) | 1994-07-19 |
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