Upsetting device for steel rail with asymmetric section

Abstract

The invention discloses an upsetting device for a steel rail with a symmetric section. Upper and lower moulding boards are connected through a guide device; two upper moulds and two lower moulds are arranged between the upper and lower moulding boards; the two upper moulds are fixedly arranged on the lower end surface of the upper moulding board, the two lower moulds are fixedly arranged on the upper end surface of the lower moulding board, and the two upper moulds are separately positioned right on the two lower moulds; the two upper moulds and the two lower moulds are closed to separately form two mould cavities; each mould cavity sequentially consists of a clamping mould cavity section, an upsetting mould cavity section and a guide mould cavity section, wherein the clamping mould cavity section, the upsetting mould cavity section and the guide mould cavity section are separately in a close-fit state, an clearance fit state and a sliding fit state with a to-be-upset steel rail; twoupsetting oil cylinders are fixedly arranged on the lower moulding boards; and piston rods of the two upsetting oil cylinders are separately opposite to the two guide mould cavity sections. Integral upsetting for different product types of the steel rail with the symmetric section is accomplished through a set of tool moulds; and meanwhile, a ball grid digital display system is utilized to precisely control steel rail upsetting amount, so that process design requirements are met.

Description

technical field [0001] The invention belongs to the technical field of rail manufacturing, and in particular relates to an upsetting device for rails with asymmetric cross sections. Background technique [0002] Steel rails are the main components of railway tracks, and the force on them is very complicated when used on the line. In order to meet the requirements of high-speed, heavy-load and long-life railway transportation, according to the force characteristics of the rails, rail shapes with different cross-sectional shapes are designed at different rail positions to resist the force acting on the rails and make the rail transportation stable and firm. And make the rail have a long service life. Among them, the most widely used is the special low-section rail (AT rail), which is a rail with an asymmetrical section. In order to meet the connection of rails with different sections, it is necessary to forge the rails with asymmetrical sections after upsetting aggregates. ...

AI Technical Summary

Problems solved by technology

This method is prone to instability during the upsetting process, resulting in rail bending and scrap products. Due to the use of segmented upsetting, the shape of the rail head section after upsetting is uneven, the rail limbs are warped, and the later forging is prone to folding, etc.

On the other hand, due to the use of the rear end plug to resist the upsetting force, it is only suitable for rails with a short rail length. At the same time, it is necessary to design special upsetting equipment, electric induction heating systems, presses, special moving induction coils, etc., occupying an area of Large, high production cost input

Images