| 摘要 |
PURPOSE:To detect a shape of a pipe, and to reform correctly the pipe by derivering a residual bend quantity by a variation of a difference of a load of each roll of the delivery of the pipe, and deriving a residual ellipse factor by a variation of a load of one roll. CONSTITUTION:In a roll type pipe reforming machine which has three pairs or more of a pair of rolls opposed to each other, offsets at least one pair of rolls against other rolls, crushes and moves a pipe by the rolls opposed to each other, and straightens the pipe, load cells 23, 27 are provided through supporting levers 22, 26 on each roll 21, 25, respectively, of a stand 13 positioned at the delivery of a pipe 10, and a load of each roll 21, 25 is detected, and inputted to an operator 33 through amplifiers 31, 32. Also, from a pulse oscillator 24 installed to the roll 21, a pulse signal is inputted to said operator 33 at every one rotation. In the operator 33, from this input signal, a variation quantity of a load difference of each roll 21, 25 and a variation quantity of a load of the roll 25 are calculated, also a residual bend quantity and a residual ellipse factor of the pipe are deived, and an offset quantity and a crush quantity are set. |
