Upper shear blade front pressing plate device of pendulum shear

Abstract

The invention discloses an upper shear blade front pressing plate device of a pendulum shear. Upper shear blades are arranged at sharp corners of the lower portions of upper shear frames, vertically-coaxial through holes are formed in an upper hanging plate and a lower hanging plate of the upper portion of each upper shear frame in the rolled piece entering direction, the edges of the two through holes are each provided with a sliding sleeve, and a connecting rod is arranged in the two through holes of each upper shear frame and the corresponding sliding sleeves in a sliding mode. A protection cover is fixedly arranged on the edge of the through hole in the upper surface of each upper shear frame, the protection covers, the sliding sleeves and the connecting rods are arranged coaxially, the upper ends of the protection covers and flanges at the front ends of cylinder bodies of hydraulic cylinders are fixedly connected, piston rods of the hydraulic cylinders are connected with the connecting rods downwards through flange sleeves, and the lower ends of the connecting rods are fixedly connected with pressing plates through pressing plate nuts. According to the device, the duckbilled pressing plates can guarantee that rolled pieces enter the pendulum shear smoothly, therefore, the function of a guide belt is achieved, the problem that the rolled pieces are piled up in front of the shear blades is solved, the shear face is straight, and shear quality is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and rolling, and relates to a front pressing plate device for an upper cutting edge of a pendulum shear. Background technique [0002] In metallurgical equipment, pendulum shears are used for transverse thermal shearing of billets and slabs and other billets with square and rectangular sections. The upper and lower blades are parallel to each other, and sometimes they are also used for shearing in cold state Small and medium-sized finished profiles. The shearing method can be divided into two types: upper cutting and lower cutting. The characteristic of the upper-cut parallel blade shearer is that the lower shear is fixed, and the shearing of the rolled piece is completed by the movement of the upper shear blade. This shearing machine is simple in structure and light in weight. The main disadvantage is that the rolled piece is easy to bend when shearing, and the sheared section is not vertic...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a front platen device for the upper cutting edge of the pendulum shear, which solves the problems of the prior art that the pendulum shear is easy to pile up and bend before the upper cutting edge when cutting the rolled piece, the operation is not smooth, and the quality of the shearing surface is poor.

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