The types, specifications and requirements of the blades used in the steel mill

A large modern steel mill in each process of the blade, in the shape, function, requirements, cutting principle and so on are not the same.The following are the main types of hot rolling knives used by various departments of steel mills; It mainly has the upper and lower crosscutting knife for cutting the thick plate head and tail.

Middle plate: It mainly has the upper and lower transverse cutting knife with the fixed length, the swinging cutting knife or the big round knife with the trimming edge, and the spiral cutting knife.

Hot rolled coil: upper and lower crosscutting knife, trimming round knife.

Cold-rolled coil: up and down flying shear cross cutting knife for measuring length, up and down cross cutting knife for coiling welding joint, trimming round knife and composite rubber ring.

Finishing: there are mainly dividing round knife, composite rubber ring and spacer ring, transverse cutting up and down knife, screw edge cutter.

The requirements for them are also different, and should be considered by themselves in combination with their respective process characteristics.For example, the hot scissors for cutting thick plates should be resistant to high temperature, impact resistance, and wear resistance in hot state.The concave and convex curve of the upper and lower curved blade of the cutting head knife must be ground to be consistent.Cutting cold rolled sheet crosscutting knife, including flying scissors, horizontal scissors should be sharp, good straightness.For the slitting round knife, the composite rubber ring core and spacer ring should be high-precision, and the thickness, parallelism and flatness errors should be within 0.002 mm, otherwise the cutting edge of the steel plate or steel strip will produce burrs.The spiral edge cutter requires that the blade can be divided correctly and the left and right spiral angles match.