The operating principle of the flying shear

Flying shear is an important equipment used by steel enterprises to shear metal blanks, and its performance will directly affect the production efficiency of rolling production lines. There are many structural forms of flying shear mechanisms. This chapter uses a four-link structure through simple three-dimensional modeling of its frame, upper and lower cranks, upper and lower connecting rods, upper and lower rockers, and workpieces. And carry out assembly and simulation, and the shear force of the workpiece during the shearing process and the motion trajectory of the two shear blades can be obtained.

The shearing machine of rolling parts in lateral shearing operation is called flying shear, which is a kind of processing equipment that can quickly cut iron plates, steel pipes and paper rolls, and is a metallurgical steel rolling industry, high-speed wire rod and rebar fixed length shearing machine, which is a product in modern rolled bar shearing, with the characteristics of less power consumption and low investment cost.

How it works

Flying shears are installed on the rolling line to cut the head and tail of the rolled parts laterally or cut them to a fixed length, and the rolled parts are cut off by the relative movement of the cutting edge during the movement of the rolling parts.

The mechanism diagram of the four-link flying shear mechanism is shown in Figure 1, which consists of two parts of the upper and lower part of the shear mechanism, and the cutting edge is fixed on the connecting rod of the four-rod mechanism. In a practical flying shear mechanism, the driving force is input from the lower crank. A pair of helical gears with the same number of teeth drives the upper crank to move at the same speed, and the mechanism cuts the workpiece once every time the crank rotates. To simplify the structure and facilitate the measurement of shear forces, the two cranks in Figure 1 were simulated with the same magnitude of torque to reduce the modeling of helical gears.