Method and apparatus for joining

#The present invention relates to a method and an apparatus for joining plate materials made of aluminum alloy or pressed materials.

#In conventional joining technique, plate materials or materials pressed in advance in a three dimensional shape are superposed to be joined by electric resistance welding, arch welding, adhesives, bolt tightening or rivets.

#When the materials are in the complex three dimensional shape, spot welding is used which can locally join a plurality of scattered joining portions.

#FIG. 1 is an enlarged view of a periphery of a rotary tool which explains a joining method of an embodiment according to the present invention;

#FIG. 2 is a cross sectional view of metal texture of a joining portion of FIG. 1;

#FIG. 3 is a schematic view of a multiarticulated robot for holding and driving the rotary tool;

#Other objects and advantages besides those discussed above shall be apparent to those skilled in the art from the description of a preferred embodiment of the invention which follows. In the description, reference is made to accompanying drawings, which form apart thereof, and which illustrate an example of the invention. Such example, however, is not exhaustive of the various embodiments of the invention, and therefore reference is made to the claims which follow the description for determining the scope of the invention.

#Embodiments of the present invention will be described below in detail with reference to the drawings.

#FIG. 1 is an enlarged view of a periphery of a rotary tool which explains a joining method of the embodiment according to the present invention. FIG. 2 is a cross sectional view of metal texture of a joining portion of FIG. 1.