Patent ID: 6192728
Filing Date: 2001-02-27
Classification: B21D

Abstract:
A pipe bending machine accurately controlling bent angle of pipes comprising:a base;a material feeding device;an arm-fixing device;a pipe bending device having one end provided with a arm-turning shaft fixed on a flat wall, said arm-turning shaft having a bending mold fixed around said arm turning shaft for a material pipe to rest on, and a turning arm connected to said art-turning shaft to move together, said turning arm having a clamp mold fixed thereon to clamp a material pipe together with said bending mold;a transmitting device having a motor fixed on a side wall, a threaded rod rotated by said motor and located between two vertical bearing bases protruding up said side wall, a threaded nut fixed around said threaded rod, a pull block connected to said threaded nut to move together, and interactive device positioned between said pull block and the axis of said turning arm to transmit power;said motor moving said threaded rod and also moving said pull block, said interactive device rotating said arm-turning shaft, said turning arm rotating with said arm-turning shaft as a center so as to perform bending accurately said material pipe clamped between said clamp mold and said arm-turning shaft.