Welding equipment for metallic materials and method for welding metallic materials
US10189112B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 12, 2015 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Feb 21, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding equipment for metallic materials capable of performing heat treatment such as tempering based on partial heating in spot welding is provided. The welding equipment sandwiches metallic materials with a pair of electrodes, and heats different regions of the metallic materials by energization, with the pair of electrodes maintained at the same position with respect to the metallic materials. The welding equipment includes a first heating means connected to the pair of electrodes for heating and welding the internal region of the circle defined by projecting the cross-sectional area of the axis of the electrodes on the metallic materials by applying power having a low first frequency, a second heating means for heating a ring-shaped region along the circle by applying power having a second frequency that is higher than the first frequency, and an energization control unit for independently controlling the first and the second heating means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.