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Patent Searching and Data


Title:
MANUFACTURE OF STRUCTURAL BODY
Document Type and Number:
Japanese Patent JP2000343245
Kind Code:
A
Abstract:

To reduce the insertion force of a rotary tool by inserting the rotary tool in a hole made in a member to be joined at the position to start the frictional agitation joining, and starting the relative movement of the rotary tool to the member to be joined.

Projecting portions 25, 35 of a butted portion of hollow shapes 20, 30 are intermittently arc-welded along a weld seam, and starting and terminating end pieces of the weld seam are temporarily arc-welded. A hole 50 which is smaller in diameter than a small diameter part 341 of a rotary tool 340 and shallower in depth than the insertion depth of the small diameter part 341 and orthogonal to face plates 21, 31 is made with its axis in the center between the projecting portions 25, 35 by using a drill from an upper part in the projecting portions 25, 35 on the side closer to the terminating end than a temporarily welded part of the starting end. The axis of the rotary tool 340 is generally inclined by about 3°. Then, the rotary tool 340 is lowered from an upper part while rotated, and inserted in a bonded part. The rotary tool 340 is lowered in a condition where the axis of the rotary tool 340 is substantially agreed with the center of the hole 50, and inserted to the specified depth, and then, the rotary tool 340 is moved along the weld seam.


Inventors:
KAWASAKI TAKESHI
ESUMI MASAKUNI
INE YOSHIHIKO
Application Number:
JP1999000151128
Publication Date:
December 12, 2000
Filing Date:
May 31, 1999
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
B23K20/12; B23K20/24; F16B5/08; F16B11/00; (IPC1-7): B23K20/12; F16B5/08; F16B11/00
Attorney, Agent or Firm:
作田 康夫