A processing method for producing multi-step cold-rolled work roll blanks by using a radial forging machine

Abstract

The invention discloses a machining method for utilizing a radial forging machine for producing a multi-step cold-rolled work roller blank, and belongs to the technical field of metallurgical machinemanufacturing. After electric furnace smelting, LF furnace refining and VD vacuum treatment, fire cutting, annealing, surface shot blasting, coal gas baking and electroslag remelting are conducted tomanufacture an MC6B multi-step cold-rolled work roller blank electroslag ingot; then, annealing and surface cleaning are conducted, and the gas furnace heating heat preservation time is larger than orequal to 24 h; then, arc upsetting plate upsetting, first-time furnace returning heating, upper flattening, lower V-shaped anvil drawing-out, second-time furnace returning heating and radial forgingmachine forging are conducted to manufacture an MC6B multi-step cold-rolled work blank roller blank; and finally, hot saw cutting, normalizing after water cooling, two-segment type spheroidizing annealing and nondestructive inspection checking are conducted, and the radial forging machine is utilized for producing the multi-step cold-rolled work roller blank. According to the machining method, forge piece allowance of a produced roller blank forge piece is small, the machining time is shortened, accordingly, the forge piece technology weight is reduced, and the manufacturing cost is saved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical machinery manufacturing; in particular, it relates to a processing method for producing multi-step cold-rolled work roll blanks by using a radial forging machine. Background technique [0002] At present, the forming method of small-sized roll blanks is mainly produced in the fast forging machine by increasing the remaining forging blocks. The domestic roll blank production technology plan is: electric furnace / converter steelmaking + LF furnace refining + VD vacuum degassing treatment The molten steel is poured into an electrode blank with appropriate size and weight. The electrode blank is subjected to stress relief annealing, then electroslag remelting, and steel ingot annealing. The annealed steel ingot is heated to the temperature required for forging deformation, and is forged into a blank forging with a fast forging machine. After the rough forging is annealed, it is processed into fin...

AI Technical Summary

Problems solved by technology

For the roll forgings produced by the existing forging process, due to the equipment precision of the fast forging machine and the large number of steps in the shape of the finished product and the large step difference, the production process needs to increase the remaining forging pieces, resulting in the loss of the yield, and the normal use of the fast forging machine The weight of the forged forging is about 1.755 tons, and the finished product rate is about 53.8% (calculated according to the weight of the finished product). The consumption of raw materials is high, and the manufacturing cost is high: the forging allowance is large, the processing cycle is long, and the production efficiency is low. The weight of the process is 1.48 times the weight of the finished product, the finished product rate is low, and the excessive input of raw materials leads to high production costs and reduced profit margins

Due to the equipment capacity, the remaining forging block is too large, resulting in long processing cycle and low production efficiency

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