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US 10,864,595 B2Granted
Method of projection welding hardware to steel sheet for hot stamping
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsYeon-Jung Hwang, Young-Tae Kim
Life of this patent
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Abstract
A method of projection welding hardware to a plated steel sheet for hot stamping, may include pressing hardware and a plated steel sheet in a state in which a welding projection on the hardware is in contact with the plated steel sheet, supplying a primary current to the hardware and the plated steel sheet in a state in which they are pressed, and supplying a secondary current to the hardware and the plated steel sheet.
Claims7
A method of projection welding hardware to a plated steel sheet for hot stamping, the method comprising:
- pressing hardware and a plated steel sheet in a state in which a welding projection on the hardware is in contact with the plated steel sheet;
- supplying a primary current to the hardware and the plated steel sheet in a state in which the hardware and the plated steel sheet are pressed;
- and
- supplying a secondary current to the hardware and the plated steel sheet,
- wherein the primary current has a value of 100% to 150% of the secondary current so that a plated layer of the plated steel sheet is melted and removed, and
- wherein the secondary current has a value of a welding temperature.
3 more elements
Dependencies are inferred from the claim text.