Welding apparatus and method thereof for hermetic compressor
AssigneeLG Electronics Inc.
InventorsIn Gi Lee, Sun Han Lee
Life of this patent
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Abstract
In a welding apparatus and a method thereof for a hermetic compressor, a welding apparatus for a hermetic compressor includes a plurality of three welding torches placed at the circumference of a casing at regular intervals, a driving unit rotating the casing or the welding torches and a control means controlling a current and a voltage applied to the welding torches in accordance with welding conditions and the driving unit. Accordingly the welding apparatus and the method thereof for the hermetic compressor are capable of decreasing sharply a welding time and improving a productivity by installing not less than three welding torches.
Claims11
A welding apparatus for a hermetic compressor, comprising:
- at least three welding torches placed at the circumference of a casing at regular intervals;
- a driving unit rotating the casing or the welding torches;
- and
- a control means controlling a current and a voltage applied to the welding torches in accordance with welding conditions and controlling the driving unit.
A welding method for a hermetic compressor, comprising:
- a first step for setting a welding condition according to characteristics of a hermetic compressor and loading a casing having an inserted upper cap to a welding position;
- a second step for starting a welding by applying power to welding torches, operating a driving unit and rotating the welding torches or the casing at a fixed speed when the casing is loaded to the welding position;
- a third step for detecting a current and a voltage applied to the welding torch and outputting a heat input transmitted from the welding torch to the upper cap in accordance with the detected electric signal when the welding is started in the second step;
- and
- a fourth step for stopping the loading of the hermetic compressor and cutting off power supply to the driving unit when the heat input transmitted to the upper cap is compared with a preset value and it is judged the heat input is larger than the preset value in the third step.
Dependencies are inferred from the claim text.