Title:
JOINT METHOD FOR COPPER-MADE OR COPPER ALLOY-MADE DIFFERENT-DIAMETER TUBES
Document Type and Number:
Japanese Patent JP2017192967
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce not only the joint cost when joining the copper-made or copper alloy-made different-diameter tubes but also an environmental load at production.SOLUTION: A joint method for copper-made or copper alloy-made different-diameter tubes includes continuously laser-joining the different-diameter straight tubes by irradiating a focal position St deviating from a contact place Lc to a small-diameter straight tube side with a laser beam LB from a laser beam emission device 112 which is perpendicular to a first virtual surface Pa including the axis of the different-diameter tubes and is disposed near the small-diameter straight tube of a second virtual surface Pp including the contact place of the straight tube while sending the straight tube in its tube axis direction in such a state as contacting the tube so that the axes Ac, As of the copper-made or copper alloy-made different-diameter straight tubes Cc, Cs are parallel to each other. In addition, the deviation width of the focal position from the contact place is 1/2 or less of a spot diameter of the laser beam.SELECTED DRAWING: Figure 1
Inventors:
FUKUSHIMA HIROHARU
Application Number:
JP2016085039A
Publication Date:
October 26, 2017
Filing Date:
April 21, 2016
Export Citation:
Assignee:
TECHNICAL KK
International Classes:
B23K26/262; B23K26/32; F25B41/00
Attorney, Agent or Firm:
Hiroharu Kitahara
Yuji Tada
Satoshi Yamauchi
Seiko Ito
Yuji Tada
Satoshi Yamauchi
Seiko Ito