The Introduction of Longitudinal Disc Shear Machine
Disc type longitudinal shear machine, usually designed with a rotating disc blade to continuous, longitudinal shear the moving strip, also can trimming the strip into a narrow width or relatively width, or cut the strip edges evenly. When it is used to cut edges, it is usually equipped with a scrap chopper which can cut the scrap edge into small pieces and is easy to recut, which cuts edges into small pieces for easy recycling.
The cut to length disc shear can be classified into two forms according to its use: plate edge disc shear and steel strip disc shear. In the former, each circle blade is cantilever fixed on a separate drive shaft, and the number of blades is two pairs, which are used in the finishing line of medium thick plate, the crosscutting unit of plate and the continuous pickling operation line. The latter blade is generally fixed in two common drive shafts (there are also a few disk blades fixed in a separate drive shaft), the number of side trimmer blades is multiple pairs, used for the splay unit, continuous annealing and galvanizing and other operations line.
Shear deformation contains the elasticity of the steel sheet, plastic variable, crack extension, material break, etc. In the elastic deformation stage, the blade is pressed against the steel plate, making the steel plate deform and bend; then, as the population distance is constantly close, the steel sheet reaches the yield limit, the plasticity in the metal becomes broken; shear continues, in the blade Produce force concentration, and induce minute crack production, the upper and lower cracks are rapidly expanded, coincident, the steel plate is disconnected, the shear process is completed.
The lateral gap of the shear edge is the most important factor affecting the quality of the steel plate. From the shear surface of the steel sheet, with the increase of the side gap, the cut layer ratio will be significantly reduced, and the burrs are substantially changed. When the side gap reaches a certain degree, the cutting layer reduction is no longer obvious, and the burrs will significantly increase. Setting a reasonable side gap value is the key to ensuring the quality of the shear.
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