RESISTANCE SPOT WELDING METHOD

Title:

RESISTANCE SPOT WELDING METHOD

Document Type and Number:

WIPO Patent Application WO/2016/174842

Kind Code:

A1

Abstract:

Welding is performed with reference to a temporal change curve representing instantaneous heating values per unit volume and a total heating value in each step that have been stored as target values during test welding. When the amount of temporal change in instantaneous heating value per unit volume has deviated in one of the steps from the reference temporal change curve, in order to compensate for the deviated amount within the remaining current-carrying time of the step, a current-carrying amount is controlled such that the total heating value per unit volume during actual welding matches the total heating value per unit volume predetermined during the test welding. Furthermore, when the occurrence of splashing is detected in one of the steps, the target value for the subsequent total heating value per unit volume is reduced, and the current-carrying amount is controlled accordingly.

Inventors:

SAWANISHI CHIKAUMI (JP)
MATSUDA HIROSHI (JP)
IKEDA RINSEI (JP)

Application Number:

PCT/JP2016/002056

Publication Date:

November 03, 2016

Filing Date:

April 15, 2016

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B23K11/24; B23K11/11

Domestic Patent References:

WO2014136507A1	2014-09-12
WO2014156290A1	2014-10-02

Other References: