METHOD AND APPARATUS FOR EVALUATING FRICTION SPOT WELD ZONE

Japanese Patent JP2008126240

A

To provide a method and an apparatus which can nondestructively, easily and highly precisely evaluate the joined quality of a friction spot weld zone.

This invention relates to the method and apparatus for evaluating a weld zone of friction spot welding in which a first metallic member 11 is superposed on a second metallic member 12 having a higher melting spot than the first 11, with the first metallic member 11 softened by friction heat to cause plastic flow therein through rotation and pressurization of a revolving tool 16, and with the first and the second metallic member 11, 12 joined in a solid state. On flashes R generated on the periphery of a recess of the weld zone P, a range of the flash shape that satisfies joined quality is preliminarily set as an allowable flash range. Then, the flash shape of an evaluation target is measured, so that the normal or defective joint of the weld zone P is evaluated with the yardstick whether the measured flash shape is within or without the allowable flash range.

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WO/2005/089997	ROTATIONAL FRICTION WELDING METHOD ROTATIONAL FRICTION WELDING UNIT WITH MEASUREMENT OF THE RELATIVE POSITION AND THE SWAGING BETWEEN THE COMPONENTS FOR JOINING TOGETHER
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GENDO TOSHIYUKI
TANAKA KOJIRO
TANIOKA SHINICHI

JP2006310527A

June 05, 2008

November 16, 2006

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MAZDA MOTOR

B23K20/12; B23K31/00; B23K103/20

JP2006334639A	2006-12-14
JP2003251472A	2003-09-09
JP2003275876A	2003-09-30
JP2005034879A	2005-02-10
JP2011025317A	2011-02-10
JP2006159217A	2006-06-22

Etsushi Kotani
Takao Ito
Jiro Higuchi

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