JP5039306B2 - Friction stir spot welding equipment - Google Patents
Friction stir spot welding equipment Download PDFInfo
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- JP5039306B2 JP5039306B2 JP2006037898A JP2006037898A JP5039306B2 JP 5039306 B2 JP5039306 B2 JP 5039306B2 JP 2006037898 A JP2006037898 A JP 2006037898A JP 2006037898 A JP2006037898 A JP 2006037898A JP 5039306 B2 JP5039306 B2 JP 5039306B2
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- 238000003756 stirring Methods 0.000 title claims description 24
- 238000003466 welding Methods 0.000 title claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 14
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims 1
- 229930006000 Sucrose Natural products 0.000 claims 1
- 239000005720 sucrose Substances 0.000 claims 1
- 230000033001 locomotion Effects 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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Description
本発明は、センタ―ピンとショルダ―ピンの回転による摩擦熱で被接合物を軟化，撹拌してスポット接合する装置であって、センタ―ピンが内挿されたショルダ―ピンを回転させる撹拌用モ―タと該ショルダ―ピンを直進駆動する加圧用モ―タとを備え、前記ショルダ―ピンの先端からセンタ―ピンが出没するようになされた摩擦撹拌スポット接合装置に関するものである。 The present invention is a device for softening and agitating the object to be joined by frictional heat generated by the rotation of the center pin and the shoulder pin, and spot-joining the device. The agitating module rotates the shoulder pin in which the center pin is inserted. The present invention relates to a friction stir spot welding device comprising a motor and a pressurizing motor for driving the shoulder pin linearly, and a center pin protruding and retracting from the tip of the shoulder pin.
従来，センタ―ピンとショルダ―ピンの回転による摩擦熱で被接合物を軟化，撹拌してスポット接合する装置であって、センタ―ピンが内挿されたショルダ―ピンを回転させる撹拌用モ―タと該ショルダ―ピンを直進駆動する加圧用モ―タとを備え、前記ショルダ―ピンの先端からセンタ―ピンが出没するようになされた摩擦撹拌スポット接合装置において、ショルダ―ピンからのセンタ―ピンの出没が一定に規制され、そのセンタ―ピンの進退をショルダ―ピンの回転方向を逆転させることにより実行させ、ショルダ―ピンとセンタ―ピンの駆動制御が接合装置本体に固定された撹拌用モ―タ及び加圧用モ―タからの出力伝達によって行われるようになされているものがある（例えば、特許文献１参照。）。 2. Description of the Related Art Conventionally, an apparatus for spot welding by softening and agitating an object to be joined by frictional heat generated by the rotation of a center pin and a shoulder pin, wherein the agitating motor rotates the shoulder pin in which the center pin is inserted. And a pressurizing motor for linearly driving the shoulder pin, wherein the center pin protrudes from the tip of the shoulder pin, and a center pin from the shoulder pin is provided. The agitation mode is controlled so that the drive of the shoulder pin and the center pin is fixed to the main body of the joining device, and the movement of the center pin is controlled by reversing the rotation direction of the shoulder pin. In some cases, this is performed by output transmission from a motor and a pressurizing motor (for example, see Patent Document 1).
ところで、上記従来の技術においては、センタ―ピンの出没が一定に規制されているため、センタ―ピンの加圧力とショルダ―ピンの加圧力を個別に調整できないことから接合部材の種類と板厚によって相違するセンタ―ピンの接合条件に対応できず、またセンタ―ピンの前進時と後退時でショルダ―ピンの回転方向を逆転させるため、ショルダ―ピンの回転がいったん停止することから折角上昇した被接合部材の温度が低下してしまい接合条件が出し難く、さらに撹拌用モ―タおよび加圧用モ―タが接合装置本体に固定されているため、ショルダ―ピンとセンタ―ピンの駆動制御にスプライン機構を介する必要があり、その分各モ―タ出力の伝達経路が複雑になる、という問題がある。 By the way, in the above-mentioned conventional technology, since the center pin is protruded and projected at a constant level, the center pin pressure and the shoulder pin pressure cannot be individually adjusted. The center pin cannot be used for different center pin joining conditions, and the rotation direction of the shoulder pin is reversed when the center pin moves forward and backward. Since the temperature of the member to be joined decreases, it is difficult to obtain the joining conditions, and since the agitation motor and pressurization motor are fixed to the main body of the joining device, the spline is used for drive control of the shoulder pin and the center pin. There is a problem that the transmission path of each motor output becomes complicated accordingly.
本発明は、従来の技術の有するこのような問題点に鑑みてなされたものであり、その目的とするところは、ショルダ―ピンの先端からピンを出没させるためにセンタ―ピン駆動用モ―タを使用し、撹拌用モ―タおよびセンタ―ピン駆動用モ―タを接合駆動側に固定し、簡単，確実にセンタ―ピンを出没させ得る摩擦撹拌スポット接合装置を提供しようとするものである。 The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a motor for driving a center pin in order to project and retract the pin from the tip of the shoulder pin. It is intended to provide a friction stir spot welding device that can easily and surely move the center pin in and out by fixing the agitating motor and the center pin driving motor to the joining drive side. .
上記目的を達成するために、本発明における摩擦撹拌スポット接合装置は、加圧用モ―タを接合装置本体に固着し、ショルダ―ピンの先端からセンタ―ピンが出没するようにセンタ―ピン駆動用モ―タを用い、該センタ―ピン駆動用モ―タと撹拌用モ―タとをセンタ―ピン及びショルダ―ピンを有する駆動部本体に固着し、センタ―ピン軸及びショルダ―ピン軸にそれぞれ中空部を形成し、センタ―ピン軸の中空部に加圧用ねじ軸の先端側を、ショルダ―ピン軸の中空部にセンタ―ピン軸の先端側をそれぞれ挿通させ、加圧用ねじ軸をセンタ―ピン軸とショルダ―ピン軸の加圧の駆動軸芯にしその外周にセンタ―ピン軸を、センタ―ピン軸の外周にショルダ―ピン軸を、それぞれ位置させ、センタ―ピンを単独で進退させるセンタ―ピン駆動用モ―タと前記センタ―ピン軸、及び前記ショルダ―ピン軸を回転させる撹拌用モ―タとショルダ―ピン軸をそれぞれ伝動ベルトで連結したことを特徴とする、ものである。 In order to achieve the above object, the friction stir spot welding device according to the present invention is a center pin driving device in which a pressurizing motor is fixed to a joining device body, and the center pin protrudes and retracts from the tip of the shoulder pin. Using a motor, the center pin driving motor and the agitating motor are fixed to the drive unit main body having the center pin and the shoulder pin, and the center pin shaft and the shoulder pin shaft are respectively attached. forming a hollow portion, center - the tip side of the pressurizing screw shaft to the hollow portion of the pin shaft, the shoulder - the hollow portion of the pin shaft center - the tip side of the pin shaft is inserted respectively, pressurization screw shaft center - The center pin shaft and shoulder pin shaft are placed on the outer periphery of the pin shaft and shoulder pin shaft, and the shoulder pin shaft is positioned on the outer periphery of the center pin shaft. -Pin drive Motor - motor and the center - pin shaft, and the shoulder - stirrer rotating pin shaft motor - motor and shoulder - characterized by being connecting pin axis in each transmission belt, those.
本発明に係る摩擦撹拌スポット接合装置では、センタ―ピンを単独で進退させるセンタ―ピン駆動用モ―タとセンタ―ピン軸、及びショルダ―ピン軸を回転させる撹拌用モ―タとショルダ―ピン軸をそれぞれ伝動ベルトで連結したので、センタ―ピンの加圧力とショルダ―ピンの加圧力を個別に調整できて接合部材の種類と板厚によって相違するセンタ―ピンの接合条件に対応でき、またセンタ―ピンの前進時と後退時でショルダ―ピンの回転方向を逆転させる必要がないので、被接合部材の温度の低下が防止され接合条件が出し易く、さらに撹拌用モ―タおよびセンタ―ピン駆動用モ―タからの出力の伝達が複雑なスプライン機構を介する必要がなく単純な伝動ベルトで実行され得るので装置が簡略される。また、加圧用ねじ軸の先端側を関係部品を中空にして駆動軸心上に配置したので直動のストロ―クを十分に大きくすることができると共に駆動装置全体をコンパクトにまとめることができる摩擦撹拌スポット接合装置となる。 In the friction stir spot welding device according to the present invention, the center pin driving motor and the center pin shaft for independently moving the center pin back and forth, and the stirring motor and the shoulder pin for rotating the shoulder pin shaft are provided. Since the shafts are connected by transmission belts, the center pin pressure and shoulder pin pressure can be individually adjusted to meet different center pin joining conditions depending on the type and thickness of the joining member. Since it is not necessary to reverse the direction of rotation of the shoulder pin when the center pin moves forward and backward, the temperature of the welded member is prevented from lowering and the joining conditions are easily set. Since the transmission of the output from the driving motor does not need to go through a complicated spline mechanism, it can be carried out with a simple transmission belt, so that the apparatus is simplified. In addition, the tip of the pressurizing screw shaft is placed on the drive shaft with the relevant parts hollow, so that the linear motion stroke can be made sufficiently large and the entire drive device can be compactly integrated. It becomes a stirring spot joining device.
図１は本発明を実施するのに適した摩擦撹拌スポット接合装置の概略構成図であり、この接合装置は、センタ―ピン１とショルダ―ピン２の回転による摩擦熱で被接合物を軟化，撹拌してスポット接合する装置であって、センタ―ピン１が内挿されたショルダ―ピン２を回転させる撹拌用モ―タ３と該ショルダ―ピン２を直進駆動する加圧用モ―タ４とを備え、前記ショルダ―ピン２の先端からセンタ―ピン１が出没するようになされた摩擦撹拌スポット接合装置において、前記加圧用モ―タ４を接合装置本体７に固着し、前記ショルダ―ピン２の先端からセンタ―ピン１が出没するようにセンタ―ピン駆動用モ―タ５を用い、該センタ―ピン駆動用モ―タ５と前記撹拌用モ―タ３とを前記センタ―ピン１及びショルダ―ピン２を有する駆動部本体８に固着し、センタ―ピン軸１１及びショルダ―ピン軸２１にそれぞれ中空部１２，２２を形成し、センタ―ピン軸１１の中空部１２に加圧用ねじ軸４１の先端側を、ショルダ―ピン軸２１の中空部２２にセンタ―ピン軸１１の先端側をそれぞれ挿通させ、加圧用ねじ軸４１をセンタ―ピン軸１１とショルダ―ピン軸２１の加圧の駆動軸芯にしその外周にセンタ―ピン軸１１を、センタ―ピン軸１１の外周にショルダ―ピン軸２１を、それぞれ位置させ、センタ―ピン１１を単独で進退させるセンタ―ピン駆動用モ―タ５と前記センタ―ピン軸１１、及び前記ショルダ―ピン軸２１を回転させる撹拌用モ―タ３とショルダ―ピン軸２１を、それぞれ伝動ベルト５１，３１で連結した摩擦撹拌スポット接合装置、である。 FIG. 1 is a schematic configuration diagram of a friction stir spot welding apparatus suitable for carrying out the present invention. This welding apparatus softens a workpiece by frictional heat generated by rotation of a center pin 1 and a shoulder pin 2. An apparatus for spot-joining by stirring, which includes a stirring motor 3 for rotating a shoulder pin 2 in which a center pin 1 is inserted, and a pressurizing motor 4 for driving the shoulder pin 2 straightly. A friction stir spot welding apparatus in which the center pin 1 protrudes and protrudes from the tip of the shoulder pin 2, the pressurizing motor 4 is fixed to the joining apparatus body 7, and the shoulder pin 2 The center pin driving motor 5 is used so that the center pin 1 protrudes and protrudes from the tip of the center pin 1, and the center pin driving motor 5 and the stirring motor 3 are connected to the center pin 1 and the agitating motor 3. Drive with shoulder pin 2 Secured to the body 8, center - pin shaft 11 and the shoulder - the pin shaft 21 to form a hollow portion 12 and 22 respectively, the center - pressurizing screw shaft 41 to the hollow portion 12 of the pin shaft 11 to the distal end side, shoulder - The distal end side of the center pin shaft 11 is inserted into the hollow portion 22 of the pin shaft 21, and the pressurizing screw shaft 41 is used as a driving shaft for pressurization of the center pin shaft 11 and the shoulder pin shaft 21. The center pin driving motor 5 and the center pin shaft 11 for moving the center pin 11 independently by positioning the pin shaft 11 and the shoulder pin shaft 21 on the outer periphery of the center pin shaft 11, respectively. And a friction stir spot welding device in which the stirring motor 3 for rotating the shoulder pin shaft 21 and the shoulder pin shaft 21 are connected by transmission belts 51 and 31, respectively.
摩擦撹拌スポット接合装置では、接合すべき被接合物（図示せず）の接合点にセンタ―ピン１を挿入し、該センタ―ピン１の回転による摩擦熱で被接合物の一部を軟化，撹拌してスポット接合するものであり、その接合装置は概略次のような構成を有している。 In the friction stir spot welding device, a center pin 1 is inserted at a joint point of workpieces (not shown) to be joined, and a part of the workpiece is softened by frictional heat generated by the rotation of the center pin 1. The agitation is performed for spot joining, and the joining apparatus generally has the following configuration.
ロボットの手首６にブラケット７１を介して取付けられた接合装置本体７には前記加圧用モ―タ４が固着されており、該加圧用モ―タ４の出力軸４２には前記加圧用ねじ軸４１が固着されている。そして前記接合装置本体７内にはセンタ―ピン駆動用モ―タ５，撹拌用モ―タ３，センタ―ピン１及びショルダ―ピン２の駆動部本体８が内蔵され、また、接合装置本体７の外側前部には固定ア―ム９が取り付けられており、該固定ア―ム９の先端部には被接合物を保持する保持冶具９１が配置されている。 The pressurizing motor 4 is fixed to the joining apparatus body 7 attached to the wrist 6 of the robot via a bracket 71, and the pressurizing screw shaft is connected to the output shaft 42 of the pressurizing motor 4. 41 is fixed. In the joining apparatus main body 7, a center pin driving motor 5, a stirring motor 3, a center pin 1 and a shoulder pin 2 driving section body 8 are built-in. A fixing arm 9 is attached to the outer front portion of the fixing arm 9, and a holding jig 91 for holding an object to be joined is disposed at the tip of the fixing arm 9.
前記駆動部本体８には前記センタ―ピン駆動用モ―タ５及び撹拌用モ―タ３がブラケット８２，８３を介して固着されていると共に該駆動部本体８は加圧用ねじ軸４１のねじと螺合するボ―ルナット８１によりセンタ―ピン軸１１及びショルダ―ピン軸２１を伴って前後進するようになっており、この駆動部本体８は前記接合装置本体７に配置された直動軸受７２によってガイドされるものである。 The center pin driving motor 5 and the agitating motor 3 are fixed to the driving unit body 8 via brackets 82 and 83, and the driving unit body 8 is a screw of a pressurizing screw shaft 41. A ball nut 81 that is screwed together with the center pin shaft 11 and the shoulder pin shaft 21 moves forward and backward, and this drive unit body 8 is a linear motion bearing disposed in the joining device body 7. 72 is guided.
前記センタ―ピン軸１１は、その先端側に形成されたセンタ―ピン螺着部１３にセンタ―ピン１を螺着するようになされ、該センタ―ピン軸１１の螺着部１３の後方はボ―ルスプライン１４を介してショルダ―ピン軸２１に接続され、後部の中空部１２内には前記加圧用ねじ軸４１の先端側が挿通され、該後部の外周にはねじ１５が螺装されている。 The center pin shaft 11 is configured such that the center pin 1 is screwed into a center pin screwed portion 13 formed on the tip end side thereof, and the rear of the screwed portion 13 of the center pin shaft 11 is a bolt. -It is connected to the shoulder pin shaft 21 through the ruspline 14, the distal end side of the pressurizing screw shaft 41 is inserted into the rear hollow portion 12, and the screw 15 is screwed on the outer periphery of the rear portion. .
前記センタ―ピン軸１１の後部のねじ１５に螺合するボ―ルネジナット１６にはプ―リ１７が固着されており、ブラケット８２によって駆動部本体８に固着された前記センタ―ピン駆動用モ―タ５からの回転力が伝動ベルト５１，プ―リ１７を介してボ―ルネジナット１６に伝達されるようになっている。 A pulley 17 is fixed to a ball screw nut 16 that is screwed into a screw 15 at the rear portion of the center pin shaft 11, and the center pin driving motor fixed to the drive unit main body 8 by a bracket 82. The rotational force from the rotor 5 is transmitted to the ball screw nut 16 through the transmission belt 51 and the pulley 17.
前記ショルダ―ピン軸２１は、その先端側に形成されたショルダ―ピン固着部２３にショルダ―ピン２をくさび止めするようになされ、該ショルダ―ピン軸２１の中空部の前半部内には前記ボ―ルスプライン１４がキ―止めされ、中空部の後半部内にはセンタ―ピン軸１１の軸受２４が配置され、該後半部の外周にはプ―リ２５が固着されている。 The shoulder pin shaft 21 is configured such that the shoulder pin 2 is wedged to a shoulder pin fixing portion 23 formed on the front end side thereof, and the bore of the shoulder pin shaft 21 is disposed in the front half portion of the hollow portion of the shoulder pin shaft 21. The sprue line 14 is keyed, the bearing 24 of the center pin shaft 11 is disposed in the rear half of the hollow part, and the pulley 25 is fixed to the outer periphery of the rear half.
前記プ―リ２５には、ブラケット８３によって駆動部本体８に固着された前記撹拌用モ―タ３からの回転力が伝動ベルト３１を介して伝達され、この回転によりショルダ―ピン２及びセンタ―ピン１は共に回転するようになっている。 A rotational force from the agitating motor 3 fixed to the drive unit main body 8 by a bracket 83 is transmitted to the pulley 25 via a transmission belt 31, and this rotation causes the shoulder pin 2 and the center to be rotated. The pins 1 are designed to rotate together.
そして、センタ―ピン軸１１の中空部１２に加圧用ねじ軸４１の先端側が、ショルダ―ピン軸２１の中空部２２にセンタ―ピン軸１１の先端側がそれぞれ挿通されて、加圧用ねじ軸４１を駆動軸芯にしその外周にセンタ―ピン軸１１が、センタ―ピン軸１１の外周にショルダ―ピン軸２１が、それぞれ位置されるようになっている。 Then, the distal end side of the pressurizing screw shaft 41 is inserted into the hollow portion 12 of the center pin shaft 11, and the distal end side of the center pin shaft 11 is inserted into the hollow portion 22 of the shoulder pin shaft 21. A center pin shaft 11 is positioned on the outer periphery of the drive shaft core, and a shoulder pin shaft 21 is positioned on the outer periphery of the center pin shaft 11.
以上のような構成を備えた摩擦撹拌スポット接合ガンでは、先ずロボット６により該摩擦撹拌スポット接合装置の全体が被接合物の所望の接合点に対向するような位置に移動される。 In the friction stir spot welding gun having the above-described configuration, first, the robot 6 moves the entire friction stir spot welding device to a position facing a desired joining point of the objects to be joined.
そこで、撹拌用モ―タ３と加圧用モ―タ４とが駆動され、加圧用モ―タ４によるボ―ルナット８１の前進により、駆動部本体８は撹拌用モ―タ３及びセンタ―ピン駆動用モ―タ５を伴って被接合物の接合点に向けて前進すると共に、撹拌用モ―タ３によりショルダ―ピン２及びセンタ―ピン１は共に回転する。この時，センタ―ピン１の先端はショルダ―ピン２のショルダ部２６より突出した状態となっている。 Therefore, the agitating motor 3 and the pressurizing motor 4 are driven, and the ball nut 81 is advanced by the pressurizing motor 4 so that the drive unit body 8 is moved to the agitating motor 3 and the center pin. Advancing toward the joining point of the workpiece together with the driving motor 5, the shoulder pin 2 and the center pin 1 are rotated together by the agitating motor 3. At this time, the tip of the center pin 1 is in a state of protruding from the shoulder portion 26 of the shoulder pin 2.
加圧用モ―タ４によりショルダ―ピン２のショルダ部２６が被接合物の表面に当接した時点では、センタ―ピン１は、被接合物内に挿入されており接合点において回転状態にあり、この時点で加圧用モ―タ４の前進を停止するが、センタ―ピン１の回転により該センタ―ピン１は、被接合物と摩擦して被接合物の一部を溶解させこれを撹拌しており、この溶解物が被接合物のスポット接合を行うものとなる。そして、ショルダ―ピン２のショルダ部２６は溶融状態にある被接合物の表面を加圧する状態にある。 When the shoulder portion 26 of the shoulder pin 2 comes into contact with the surface of the article to be joined by the pressurizing motor 4, the center pin 1 is inserted into the article to be joined and is in a rotating state at the joining point. At this time, the advancement of the pressurizing motor 4 is stopped, but the center pin 1 rubs against the workpiece to be melted by the rotation of the center pin 1 and dissolves a part of the workpiece to be stirred. The melted material performs spot bonding of the objects to be bonded. The shoulder portion 26 of the shoulder pin 2 is in a state of pressing the surface of the object to be joined in a molten state.
そして、上記の接合動作が行われると、センタ―ピン駆動用モ―タ５が駆動されて、センタ―ピン１は被接合物の接合点から引き抜かれてショルダ―ピン２のショルダ部２６と同一レベル或はそれより更にショルダ―ピン２内に引き抜かれる。この間も撹拌用モ―タ３は駆動されているので、回転するショルダ―ピン２のショルダ部２６は被接合物の接合点の表面を平らにするように動作する。 When the joining operation is performed, the center pin driving motor 5 is driven, and the center pin 1 is pulled out from the joining point of the object to be joined and is the same as the shoulder portion 26 of the shoulder pin 2. The level or even more is pulled into the shoulder pin 2. During this time, since the agitating motor 3 is driven, the shoulder portion 26 of the rotating shoulder pin 2 operates so as to flatten the surface of the joining point of the object to be joined.
なお、ショルダ―ピン２のショルダ部２６に対するセンタ―ピン１の出没は、加圧用モ―タ４や撹拌用モ―タ３の駆動とは関係なく独自にセンタ―ピン駆動用モ―タ５を駆動させることにより任意に調節できるものであり、またショルダ部２６に対するセンタ―ピン１の出没量及び加圧力は任意に調節が可能であり、また、該モ―タ５の駆動は接合点の溶解物の状況に応じて必要時に動作させることが可能である。 It should be noted that the center pin 1 is raised or lowered with respect to the shoulder portion 26 of the shoulder pin 2 independently of the driving of the pressurizing motor 4 or the agitating motor 3. It can be arbitrarily adjusted by driving, the amount of protrusion and the pressing force of the center pin 1 with respect to the shoulder portion 26 and the pressing force can be arbitrarily adjusted, and the driving of the motor 5 is to dissolve the junction point. It can be operated when necessary according to the situation of the object.
以上のように、本発明に係る摩擦撹拌スポット接合装置では、センタ―ピン１を単独で進退させるセンタ―ピン駆動用モ―タ５とセンタ―ピン軸１１、及びショルダ―ピン軸２１を回転させる撹拌用モ―タ３とショルダ―ピン軸２１を、それぞれ伝動ベルト５１，３１で連結したので、センタ―ピン１の加圧力とショルダ―ピン２の加圧力を個別に調整できて接合部材の種類と板厚によって相違するセンタ―ピン１の接合条件に対応でき、またセンタ―ピン１の前進時と後退時でショルダ―ピン２の回転方向を逆転させる必要がないので、被接合部材の温度の低下が防止され接合条件が出し易く、さらに撹拌用モ―タ３及びセンタ―ピン駆動用モ―タ５からの出力の伝達が複雑なスプライン機構を介する必要がなく単純な伝動ベルト３１，５１で実行され得るので装置が簡略される。また、加圧用ねじ軸４１の先端側を関係部品を中空１２，２２にして駆動軸芯上に配置したので直動のストロ―クを十分に大きくすることができると共に駆動装置全体をコンパクトにまとめることができるものである。 As described above, in the friction stir spot welding device according to the present invention, the center pin driving motor 5, the center pin shaft 11, and the shoulder pin shaft 21 for moving the center pin 1 back and forth independently are rotated. Since the agitating motor 3 and the shoulder pin shaft 21 are connected by transmission belts 51 and 31, respectively, the pressing force of the center pin 1 and the pressing force of the shoulder pin 2 can be individually adjusted, and the types of joining members It is possible to cope with the joining conditions of the center pin 1 that differ depending on the plate thickness, and it is not necessary to reverse the rotational direction of the shoulder pin 2 when the center pin 1 moves forward and backward. The transmission belts 31 and 5 can be prevented from being lowered and the joining conditions can be easily obtained, and the transmission of the outputs from the agitating motor 3 and the center pin driving motor 5 does not need to go through a complicated spline mechanism. Apparatus is simplified since in may be performed. In addition, since the tip side of the pressure screw shaft 41 is disposed on the drive shaft core with the related parts being hollow 12 and 22, the linear motion stroke can be made sufficiently large and the entire drive device can be made compact. It is something that can be done.
１ センタ―ピン
２ ショルダ―ピン
３ 撹拌用モ―タ
４ 加圧用モ―タ
５ センタ―ピン駆動用モ―タ
７ 接合装置本体
８ 駆動部本体
１１ センタ―ピン軸
１２ センタ―ピン軸の中空部
２１ ショルダ―ピン軸
２２ ショルダ―ピン軸の中空部
３１，５１ 伝動ベルト
４１ 加圧用ねじ軸
1 Center pin 2 Shoulder pin 3 Motor for stirring 4 Motor for pressurization 5 Motor for driving the center pin
7 Bonding device body
8 Drive unit main body 11 Center pin shaft 12 Center pin shaft hollow portion 21 Shoulder pin shaft 22 Shoulder pin shaft hollow portion 31, 51 Transmission belt 41 Pressure screw shaft
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