Glass lubricating cushion for hot extrusion and capable of reducing extrusion force

Abstract

The invention discloses a glass lubricating cushion for hot extrusion and capable of reducing extrusion force. The glass lubricating cushion is an annular piece and comprises a die orifice contact surface and a blank contact surface. The glass lubricating cushion is characterized in that the blank contact surface is divided into a guide section and a bearing section; an included angle of working surfaces of the guide section and the bearing section is 95-175 degrees; and the length ratio of the guide section and the bearing section is (0-10):(10-0). The blank contact surface is divided into the guide section and the bearing section and the inclined angle between the guide section and an annular axis is less than 90 degrees, so that initial extrusion breaking force in a hot extrusion process is reduced; meanwhile, the extrusion force of a stable phase is reduced and the production range of hot extrusion equipment is enlarged; and meanwhile, the extrusion ratio can be increased by using a larger extrusion barrel so that the quality of a product is better. Furthermore, the extrusion force is reduced so that the load and abrasion of a tool and a die are reduced, the service life is prolonged and die steel with a lower price can be used; and therefore, the cost of maintaining extrusion tool and die is greatly reduced, and the production efficiency and the economic benefit are improved.

Description

technical field [0001] The invention belongs to the technical field of metal thermal processing equipment, further belongs to the technical field of auxiliary parts of metal extrusion equipment, and in particular relates to a glass lubricating pad for hot extrusion that can reduce extrusion force. Background technique [0002] The glass lubrication process has a key impact on the hot extrusion of steel. Without using glass lubricants, the dies would wear excessively, and the molds would be scrapped after one use. The invention of glass lubricants solved this problem. In the hot extrusion process of steel, the circular glass lubricant must change from a solid state to a viscous state (it is called a glass lubricating pad in a solid state), forming a complete and continuous adhesive film on the surface of the billet, and together with the billet Deformation flow, so as to play the role of lubrication, heat insulation, reduce friction, and finally form a protective film on the ...

AI Technical Summary

Problems solved by technology

Due to the need for a larger extrusion breakthrough force in the initial extrusion stage, the extrudable range of the extrusion equipment is reduced

In addition, due to the existence of extrusion breakthrough force, for extrusion equipment with specific power, it is necessary to properly reduce the extrusion ratio, or increase the extrusion temperature, so that extrusion can proceed, which not only affects product quality, but also the breakthrough force The existence of glass lubricants and extrusion tool materials puts forward higher requirements, and also reduces their service life

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