Hard alloy combined roller locking device

Abstract

The invention discloses a hard alloy combined roller locking device which comprises a roller shaft and at least one roller ring arranged on the outer side of the roller shaft in a sleeving mode, distance rings are arranged on the two adjacent sides of every two adjacent roller rings, the linear expansion coefficient of the roller shaft is A, the expansion coefficient of the roller rings is B, and the expansion coefficient A of the roller shaft is larger than the expansion coefficient B of the roller rings; and the roller shaft and the roller rings are in interference fit through thermal expansion, one end of the roller shaft is provided with a baffle ring used for blocking the roller rings, the other end of the roller shaft is provided with a locking nut, the locking nut is in tight pressing contact with the end face of the roller ring on the rightmost side, and the roller shaft is in threaded connection with the locking nut. The hard alloy combined roller locking device is designed aiming at defects of existing devices, the number of components of a locking mechanism is decreased as much as possible, the locking mode has all the advantages of a hydraulic nut mode and a mechanical clamping fixing mode, and further has the advantages of being few in component, convenient to machine and lower in machining cost, small clearance fit is adopted for assembling, disassembling is convenient, and practicability is high.

Description

technical field [0001] The invention relates to the technical field of mechanical assembly, in particular to a cemented carbide combined roll locking device. Background technique [0002] The quality factor of the roll, one of the important parts of the rolling mill, directly affects the output, product quality and cost of the roll consumption of the steel mill. At present, the rolls used by bar manufacturers are still mainly cast iron rolls. The wear resistance of the rolls is poor, and the service life of the rolling groove is short, which seriously affects the dimensional accuracy of the product and is not conducive to improving the operating rate of the rolling mill. In recent years, cemented carbide combined rolls that overcome the defects of cast iron rolls have been rapidly promoted and applied. The cemented carbide combined roll has the characteristics of simple and practical structure, convenient maintenance, safe and reliable operation, and has obvious technical a...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the two assembly methods currently in use: the hydraulic nut has the disadvantages of a large number of processing components, high requirements for matching accuracy, strict requirements on processing equipment, special tools are required for maintenance and replacement of rollers, and it is not easy to disassemble, and the processing cost is high. It is very complicated to disassemble, and even need to return to the manufacturer to disassemble through fixed equipment

Although the processing cost of mechanical clamping is slightly reduced, it still has the disadvantages of a large number of processing components (26 pieces per component) and high positioning accuracy requirements

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