| 摘要 |
PURPOSE: An argon welding machine for automatically welding a heat exchanger is provided to automatically weld the tube inserting holes and an end part of the tubes in the state that a plurality of tubes into the outer circumference of which a plurality of radiant fins are inserted is inserted into a plurality of tube inserting holes. CONSTITUTION: The argon welding machine for automatically welding a heat exchanger is characterized in that a motor(11) and a vertical handle(9) are respectively installed at the lower part of a cylindrical housing(7) the front and rear of which are opened, a driving bevel gear(12) installed on a motor shaft of the motor(11) is insertingly installed inside the housing(7), a ring shaped driven bevel gear which is perpendicularly in gear with the driving bevel gear(12) is installed inside the housing(7), hollow front and rear bodies of revolution are rotation freely installed in front and rear of the driven bevel gear in the state that each of the bodies of revolution are supported to a bearing(16), a rod shaped collet(17) which is inserted into an internal hole of a tube(3) of a heat exchanger(5) is installed at the center part in front of the front body of revolution in such a way that the collet is projected forward, a torch holder attaching plate is installed in rear of the rear body of revolution(15), a torch holder(26) on which a welding torch(27) is horizontally installed is installed at an eccentric position of the torch holder attaching plate, a second driven bevel gear engaged with the driven bevel gear is installed at one side of the inner part of the housing(7), an encoder is installed on a shaft on which the second driven bevel gear is formed, and a horizontal handle encircling the encoder is installed in rear of the second driven bevel gear.
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