US 2026/0102838 A1 · RESISTANCE SPOT WELDING DEVICE AND METHOD FOR VEHICLE ASSEMBLY

Abstract

A resistance spot welding device for vehicle assembly includes a welding gun having an upper electrode and a lower electrode mounted thereon, the upper electrode and the lower electrode facing each other, an adjustment jig for adjusting straightness between the upper electrode and the lower electrode, an image capturing apparatus mounted on the welding gun for photographing a welding surface, teaching blocks respectively mounted on a plurality of welding points formed on the welding surface, and a controller for calculating, through image information on each of the teaching blocks received from the image capturing apparatus, a rotation amount and a movement amount of the welding gun, and to perform a control operation to correct a welding position of the welding gun based on the calculated rotation amount and movement amount.

Claims20

Dependent claims

A resistance spot welding device for vehicle assembly, the resistance spot welding device comprising:

a welding gun;
an adjustment jig configured to adjust positioning of the welding gun;
an image capturing apparatus mounted on the welding gun and configured to photograph a welding surface;
teaching blocks respectively mounted on a plurality of welding points formed on the welding surface;
and
a controller configured to calculate, through image information on each of the teaching blocks received from the image capturing apparatus, a rotation amount and a movement amount of the welding gun, and to perform a control operation to correct a welding position of the welding gun based on the calculated rotation amount and movement amount.

3 more elements

A resistance spot welding method for vehicle assembly, the resistance spot welding method comprising:

a straightness adjustment step of adjusting, by an adjustment jig, straightness between an upper electrode and a lower electrode each forming a welding gun;
a welding gun position correction step of mounting a teaching block on a welding point formed on a welding surface when the straightness between the upper electrode and the lower electrode is determined to be satisfied, and calculating, by a controller, a rotation amount and a movement amount of the welding gun through image information on the teaching block received from an image capturing apparatus so as to correct a welding position of the welding gun;
a welding point position comparison step of comparing, when the corrected welding position of the welding gun is transmitted to the controller, a difference between the welding position and a reference welding position previously stored in the controller;
and
a welding step of controlling, by the controller, the welding gun when the welding position and the reference welding position coincide with each other and performing welding on the welding point.

2 more elements

Dependencies are inferred from the claim text.

Resistance spot welding device and method for vehicle assembly

Life of this patent

Resistance spot welding device and method for vehicle assembly

Life of this patent

Abstract

Claims20