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US 11,440,126 B2Granted
Method for resistance welding
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorHyun Woo Lee
Life of this patent
Estimating the term…
Abstract
A welding device of a robot arm includes a welding machine having a first pressing member which includes a cylindrical first pressing part and a second pressing member which includes a second pressing part inserted into a hollow of the first pressing part. A transformer supplies a positive (+) current to the first pressing member and a negative (−) current to the second pressing member. The first and second pressing parts have the same co-axis.
Claims4
A method for welding a vehicle part to a vehicle body using a welding device, the method comprising steps of:
- supplying power to a transformer;
- and
- supplying a positive (+) current to a first pressing member through a positive (+) bus bar and a negative (−) current to a second pressing member through a negative (−) bus bar,
- wherein the welding device supplies the positive (+) current while a first pressing part of the first pressing member presses the vehicle part having a protrusion and then supplies the negative (−) current while a second pressing part of the second pressing member presses the protrusion by penetrating through the first pressing part, and
- wherein the protrusion has a size larger than a diameter of the first pressing part of the first pressing member.
2 more elements
Dependencies are inferred from the claim text.