Patent ID: 6272959
Filing Date: 2001-08-14
Classification: B23D,Y10T

Abstract:
Continuously rotating shears to shear to size metallic strip fed continuously at up to around 20 meters per second and having a thickness of from 0.5 mm to 5 mm and a width of from 500 mm up to at least 1500 mm, comprising:a frame;first rotary cam means rotatably mounted on said frame;second rotary cam means rotatably mounted on said frame, said first and second rotary cam means being provided with corresponding toothed wheels in engagement therebetween for causing said first and second rotary cam means to rotate in opposite angular directions;a first blade-bearing drum carrying a corresponding first shearing blade, said first blade-bearing drum being rotatably mounted on said first rotary cam means;a second blade-bearing drum carrying a corresponding second shearing blade, said second blade-bearing drum being rotatably mounted on said second rotary cam means;synchronization means for synchronizing the rotation of said two blade-bearing drums, said synchronization means comprising a first rotary tube and a second rotary tube rotatably mounted on said frame, said rotary tubes having the same rotational axes of said rotary cam means, said first rotary tube having a first outer gear and a first inner gear, said second rotary tube having a second outer gear and a second inner gear, said first and second outer gears being in engagement therebetween for causing said first and second rotary tubes to rotate in opposite angular directions, said first blade-bearing drum having a first external gear in engagement with said first inner gear and said second blade-bearing drum having a second external gear in engagement with said second inner gear, whereby said first and second blade-bearing drums are caused to rotate in opposite angular directions;an external source of motion connected to at least one of said blade-bearing drums for causing the rotation thereof; andshearing command means connected to at least one of said cam means for causing the rotation thereof.