Resistance welding quality determination method and resistance welding quality determination apparatus
AssigneePanasonic EV Energy Co., Ltd.
InventorsKenichi Suzuki, Yugo Nakagawa
Life of this patent
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Abstract
A resistance welding quality determination method comprises: a step of detecting a voltage value applied to a welding electrode of a resistance welding machine; a step of detecting a current value supplied to the welding electrode; a step of calculating a welding resistance value based on the voltage value and the current value; a step of correcting the welding resistance value based on a change amount of a contact resistance value between the work and the welding electrode during welding of a work; and a step of determining welding quality of the work based on a corrected welding resistance value obtained by correcting the welding resistance value.
Claims8
A method of determining welding quality of a work in a welding process for resistance welding the work by use of a resistance welding machine, comprising the steps of:
- detecting a voltage value applied to a welding electrode of the resistance welding machine during welding of the work;
- detecting a current value supplied to the welding electrode of the resistance welding machine during welding of the work;
- calculating a welding resistance value based on the voltage value and the current value;
- correcting the welding resistance value based on a change amount in contact resistance between the work and the welding electrode during welding of the work;
- and
- determining the welding quality of the work based on a corrected welding resistance value obtained by correcting the welding resistance value.
An apparatus for determining welding quality of a work in a welding process for resistance welding the work by use of a resistance welding machine, the apparatus comprising:
- a welding resistance value calculating section for calculating a welding resistance value based on a voltage value applied to a welding electrode of the resistance welding machine and a current value supplied to the welding electrode;
- a welding resistance value correcting section for correcting the welding resistance value based on a change amount in contact resistance between the work and the welding electrode during welding of the work;
- and
- a welding quality determining section for determining welding quality of the work based on a corrected welding resistance value obtained by correcting the welding resistance value.
Dependencies are inferred from the claim text.