Tool for friction stir welding
a technology of friction stir welding and tools, which is applied in the direction of manufacturing tools, soldering devices, auxillary welding devices, etc., can solve the problems of high torsional stress applied thereto, loose fittings, and difficulty in detachment of tools, so as to achieve the effect of easy detachment from the shank par
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first embodiment
[0066]Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, a tool for friction stir welding 10a according to the present invention includes a shank part 100a, a tool part 200a and a cap part 300.
[0067]The shank part 100a has a columnar shape as a whole. The shank part 100a fixes the tool part 200a to a front end thereof at a lower end in FIG. 1, and is rotated about an axis of rotation 11 by a power source (not shown) together with the tool part 200a. The shank part 100a can be manufactured using a relatively inexpensive material such as tool steel or the like. A screw hole section configured to fix the cap part 300 using a screw may be formed at a circumferential edge or an outer periphery of the front end of the shank part 100a. Alternatively, a groove configured to fix the cap part 300 may be formed in the outer periphery of the front end of the shank part 100a.
[0068]The tool part...
third embodiment
[0080]Hereinafter, the present invention will be described. As shown in FIG. 5, in a tool for friction stir welding 10c of the embodiment, a conical frustum concave section 122 recessed in a conical frustum shape is formed at a center of a front end of a shank part 100c. A side surface of the conical frustum concave section 122 is inclined toward the axis of rotation 11 of the shank part 100c while reaching the inside of the shank part 100c from the front end of the shank part 100c. In addition, keys 131 protruding in a direction parallel to the axis of rotation 11 at positions of 0° and 180° around the axis of rotation 11 are formed at a circumferential edge of the front end of the shank part 100c. These keys 131 may be disposed at positions of 0°, 90°, 180° and 270° around the axis of rotation 11 in a cross shape. In addition, an arbitrary number of keys 131 may be disposed.
[0081]As shown in FIGS. 5 and 6, a conical frustum convex section 212 corresponding to a shape of the conica...
fifth embodiment
[0112]In addition, as shown in FIGS. 20 and 21, the tool for friction stir welding 10i of the embodiment is distinguished from the fifth embodiment in that a serrated shape 251 including the vertical surface 253 parallel to the axis of rotation 11 of the shank part 100i and perpendicular to the direction around the axis of rotation 11 is provided at a bottom section of the base section 205 of the tool part 200i. The serrated shape 251 of the tool part 200i has a shape corresponding to a shape of the serrated shape 151 of the shank part 100i, and is disposed to correspond to the disposition of the serrated shape 151 of the shank part 100i. The four serrated shapes 251 that include the common vertical surface 253 are disposed at the bottom section of the base section 205 of the tool part 200i. Further, the shapes and the numbers of the serrated shapes 151 and the serrated shapes 251 may be arbitrarily selected.
[0113]Hereinafter, an action of the tool for friction stir welding 10i of t...
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Abstract
Description
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