| 摘要 |
PURPOSE: A boring machine for a large-sized pipe is provided to prevent a pipe from becoming pushed back when drills touch the pipe because a contact roller is adhered to the inner surface of the pipe. CONSTITUTION: A boring machine for a large-sized pipe comprises a lathe(10), a tilt body(30), a tilt body moving unit, a drill support(50), a drill support moving unit, multiple drills(70), and a drill operating unit. A large-sized pipe(1) is placed on the lathe and is supported by a pair of support rollers(12). The tilt body is moved at the rear of the lathe. The tilt body moving unit controls the longitudinal movement of the tilt body. The drill support is vertically moved along the tilt body and is longitudinally moved to the vertically moved position. The drill support moving unit controls the vertical and longitudinal movement of the drill support. The drills are horizontally and continuously installed on the top of the drill support and bore the large-sized pipe in a longitudinal direction. The drill operating unit rotates the drills.
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