How to select knife gap of slitting DSS for plate 45~# with high strength is analyzed to assure the shearing quality and to prolong service life and the formula for knife gap regulating has been derived during application.

With development of the industrial control system,programmable logic controller(PLC) is widely used in dividing shear of Baosteel Heavy Plate Mill(HPM),especially in the fields of the main motor control of dividing shear,collection and analysis of PDA data,control of pinch rolls, adjustment control of knife gaps,shearing process control,etc.

,and the knife gap is one of the key factors that effect the cutting qualities.

Optimizing the parameters of shearing lengths,shearing accuracy,blade clearance and pressure plate mechanism,so as to improve the shearing quality of steel plates.

Study of the experimental formula of the blade gap adjustment for rotary cutting shear;

Research on the formula for blade gap regulating of slitting double-sided shear and length shear;

,in cutting process there are some problems,such as,blade gap adjustment is not accurate,automation level of clamp and width adjustment of whole equipment are not high.

Analyzing cam examination of the guillotine shears′ blade clearance;

On the basis of experiments, the article talks about the regularity of the blade clearance, shape and the quality of the blanking parts changes of the zinc based alloy die; analyzes those factors which affect the quality of blanking parts and suggests the measures for improving the quality of blanking parts and the life of die.