| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube drawing detection device in a centrifugal casting unit capable of causing no malfunction even when the user environment is not good enough and the frequency of usage is high in the tube drawing detection device of the centrifugal casting unit. SOLUTION: The tube drawing detection device in the centrifugal casting unit comprises a clamp unit 19 to clamp the inside surface of the tube 12 to draw the tube 12, a terminal 29 to travel to the tube axial direction integrally with this clamp unit 19, an air cylinder 26 to press the terminal 29 to the tube 12 with an air pressure when the clamp unit 19 is inserted into the inside of the tube 12, and a sensor 32 which can detect the terminal 29 to press back the air cylinder 26 with a reaction force when the terminal 29 is pressed by the tube 12 and at the same time, which can detect the terminal 29 to be extruded from the regular position with the air pressure of the air cylinder 26 when a slippage occurs and a drawing fails between the clamp unit 19 and the tube 12 at the time of drawing the tube 12.
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