Automatic and manual welding apparatus

An automatic-manual welding apparatus comprising:

• a welding table (100) comprising a first table (110) and a second table (120) spaced a predetermined distance apart from each other, with a welding space (130) formed therebetween;
• a workpiece-fixing unit (200) movably provided at the first table (110) and the second table (120), the workpiece-fixing unit (200) being configured to fix an object to be welded;
• a welding unit (300) provided at the second table (120), the welding unit (300) comprising a welding torch (310) configured to weld an object to be welded fixed by the workpiece-fixing unit (200);
• a vertical welding-unit-transferring unit (400) configured to move the welding unit (300) in a vertical direction with respect to a top surface of the second table (120);
• a horizontal welding-unit-transferring unit (500) provided on the top surface of the second table (120), the horizontal welding-unit-transferring unit (500) being configured to move the vertical welding-unit-transferring unit (400) in a forward-and-backward direction with respect to the welding space (130);
• a welding gas supply unit (600) configured to supply a welding gas to the welding torch (310);
• an input unit (700) configured to selectively receive a power supply signal, a driving signal, and a welding signal associated with the workpiece-fixing unit (200), the welding unit (300), the vertical welding-unit-transferring unit (400), the horizontal welding-unit-transferring unit (500), and the welding gas supply unit (600);
• and
• a controller (800) configured to, upon receiving a welding signal from the input unit (700), control the welding unit (300), the vertical welding-unit-transferring unit (400), the welding gas supply unit (600), and the horizontal welding-unit-transferring unit (500) such that the welding torch (310) welds the object to be welded while moving a predetermined welding distance forwards and backwards,
• wherein the horizontal welding-unit-transferring unit (500) comprises:
• a forward/backward transfer motor (510) configured to be rotatable in forward and reverse directions;
• a forward/backward transfer screw (520) coupled at a first end portion thereof to the forward/backward transfer motor (510), the forward/backward transfer screw (520) being configured to be rotated in forward and reverse directions together with the forward/backward transfer motor (510);
• a forward/backward transfer screw support block (521) configured to rotatably support the forward/backward transfer screw (520);
• a forward/backward welding-unit-transferring guide (530) connected to the forward/backward transfer screw (520) and the vertical welding-unit-transferring unit (400), the forward/backward welding-unit-transferring guide (530) being configured to move the welding unit (300) forwards and backwards in accordance with rotation of the forward/backward transfer screw (520) in forward and reverse directions;
• and
• a manual operation handle (540) coupled to a second end portion of the forward/backward transfer screw (520), the manual operation handle (540) being configured to manually rotate the forward/backward transfer screw (520),
• wherein the input unit (700) comprises an operation changeover switch (760) configured to switch between a manual input mode, in which supply of power to the forward/backward transfer motor (510) is interrupted, and an automatic input mode, in which supply of power to the forward/backward transfer motor (510) is allowed, the operation changeover switch (760) switching between a mode of automatically rotating the forward/backward transfer screw (520) and a mode of manually rotating the forward/backward transfer screw (520), and
• wherein the controller (800) controls the forward/backward transfer motor (510) such that when the manual input mode is selected through the operation changeover switch (760), supply of power to the forward/backward transfer motor (510) is interrupted and such that when the automatic input mode is selected through the operation changeover switch (760), supply of power to the forward/backward transfer motor (510) is allowed.