According to the use of shearing machine, shearing machine can be divided into two kinds of Shearing Machine and cutting shear machine. If the shearing machine is divided by the type of shearing machine, the wider use of shears, drum shears, crankshaft shears, crank eccentric shears, pendulum shears and Crank joystick shear and so on. Over the past decade, the use of computer programmable control and other new technology of the shear machine has been a certain development
Shearing machine is characterized by horizontal shear movement of the rolling, it has three basic requirements: 1) cutting edge in the shear rolling with the movement of the rolling with the movement, that is, the blade should be completed at the same time Shear and movement of the two movements, and the cutting edge in the direction of the movement of the instantaneous speed v should be equal to or faster than the rolling speed v0 2% to 3%, that is v = (1 ~ 1.03) v0.
When cutting the rolling, the cutting edge in the direction of the rolling movement of the instantaneous speed v if less than the moving speed v0, the cutting edge will hinder the movement of the rolling, will make the rolling bending, and even produce rolling knife accident The On the other hand, if the instantaneous velocity v of the shearing edge in the direction of the shearing is much larger than the rolling velocity v0, the greater the tensile stress will be produced in the rolling, which will affect the shear quality and Increase the impact load of the shearing machine; 2) According to the different specifications of the product and the user's requirements, in the same shearing machine should be able to cut a variety of specifications of the length of the length, and the length of the tolerance and shear section quality The relevant provisions of the state; 3) to meet the rolling mill or unit productivity requirements.
The shearing machine is used to cut the head, cut the tail and shear length longer and lower speed of the workpiece. The start and brake of the shearing machine are carried out automatically. When the head of the workpiece is applied to the optoelectronic device (Figure 9-9b) (P306) after the shearing machine, the shearing machine is automatically activated. The length of the length of the workpiece L according to the following formula to determine L = L '+ v0 t0 9-2 where L' - the distance between the photoelectric device and the shearing machine; t0 - the time from the start to the shear