Arc welding apparatus
First Claim
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1. An arc welding apparatus comprisingan arm;
- a torch mounted on said arm, said torch including a gas nozzle and a welding electrode, a passage being defined between said gas nozzle and said welding electrode;
a first connecting pipe and a second connecting pipe;
a valve means which is in communication through said first connecting pipe with said passage between said gas nozzle and said welding electrode, said valve means functioning to selectively introduce either pressurized air or a shield gas into the first connecting pipe;
a tank; and
a pump which functions to introduce oil from said tank into said first connecting pipe through said second connecting pipe, said pump introducing oil when said valve means introduces said pressurized air into said first connecting pipe.
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Abstract
A method and apparatus are provided for removing spatter from a torch of a gas shielded arc welding apparatus. After a series of welding operations are completed, pressurized air mixed with a small amount of oil is injected through a passage defined between a member supplying a welding electrode and a gas nozzle. This oil emitted adheres to the surface of the electrode supply member and the gas nozzle, thereby generating an oil film thereon. The pressurized air removes any spatter on the apparatus and the oil film prevents any further spatter from adhering to the surface.
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Citations
10 Claims
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1. An arc welding apparatus comprising
an arm; -
a torch mounted on said arm, said torch including a gas nozzle and a welding electrode, a passage being defined between said gas nozzle and said welding electrode; a first connecting pipe and a second connecting pipe; a valve means which is in communication through said first connecting pipe with said passage between said gas nozzle and said welding electrode, said valve means functioning to selectively introduce either pressurized air or a shield gas into the first connecting pipe; a tank; and a pump which functions to introduce oil from said tank into said first connecting pipe through said second connecting pipe, said pump introducing oil when said valve means introduces said pressurized air into said first connecting pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification