Combined flying shear

Abstract

The invention discloses a combined flying shear and belongs to the technical field of steel rolling. The combined flying shear comprises a framework, a crankshaft, connecting rods, a dual-purpose tool bit and a support, wherein one ends of the connecting rods are hinged with the framework, a crankshaft seat is arranged in the middle of the crankshaft, and the support is demountably connected with the dual-purpose tool bit and the crankshaft seat simultaneously. In two operation modes of the flying shear, the same tool bit, namely the dual-purpose tool bit can be used with no need of respectively manufacturing tool bits for different two modes, so that costs of materials and processing are saved, and manufacturing cost of the combined fly shear is greatly reduced. Meanwhile, the support can be mounted or demounted during switching of the two operation modes, halt time is greatly shortened, mounting and demounting workload is reduced, switching efficiency is high, production benefits are increased, and workload of maintainers is decreased.

Description

technical field [0001] The invention relates to the technical field of steel rolling production, in particular to a combined flying shear. Background technique [0002] Flying shears are used to shear the rolled piece in transverse motion. Therefore, the basic requirement for the flying shear is that the shearing blade should complete the two actions of shearing and moving at the same time when cutting the rolled piece, and the shearing blade should run at the same time as the rolling piece. The instantaneous sub-speed in the direction should be basically equal to or slightly greater than the running speed of the rolling piece. [0003] In the rod and wire production line, there are mainly three types of flying shears: drum type, crank type and combined type. The drum-type flying shear has simple structure, large radius of gyration, and high shearing speed, but its cutting edge is not perpendicular to the rolling piece during shearing, and the rolling piece has an additiona...

AI Technical Summary

Problems solved by technology

Although this combined flying shear has many advantages, it also has its disadvantages. One is that the crank cutter head and the rotary cutter head are independent parts. When the cutting mode needs to be changed, the cutter head needs to be pulled out from the crankshaft, and then Installing another set of cutter heads on the crankshaft will bring a lot of installation and disassembly workload, and at the same time increase the downtime, causing the entire production line to stop for this, which undoubtedly greatly reduces the output of the production line and benefits

Second, the rotary cutter head and the crank cutter head need to make one set (upper and lower tool holders), that is, four cutter heads, which not only needs to increase the cost of materials, but also increases the cost of processing

Third, after the rotary cutter head is installed in place, it is very difficult to adjust the side clearance of the cutting edge. Usually, it can only be adjusted by grinding the gasket, which requires multiple installation, disassembly, measurement, and grinding, which increases the workload and is not easy. Guaranteed accuracy

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