Method for heating large sheet arc-shaped forge piece before forging

Abstract

The invention provides a method for heating a large sheet arc-shaped forge piece before forging. The method comprises the following steps that A, a plurality of parallel sizing blocks are arranged ona universal charging tray, and the heights of the sizing blocks are gradually reduced from two ends to the middle; B, the forge piece is placed on sizing blocks, the forge piece makes contact with thesizing blocks located at the two ends, and gaps exist between other sizing blocks and the forge piece; C, the forge piece is heated to initial forging temperature. The plurality of sizing blocks withdifferent heights are arranged on the charging tray. When a plate is heated to be softened and deformed under the action of gravity, the sizing blocks can support the plate. The deformation amount can be controlled within a certain range, and the plate is prevented from generating large deformation. The shape of the heated plate can be matched with a mold, and therefore the plate can be quickly transferred into the mold and positioned. Thus, the efficiency is improved, the initial forging temperature is prevented from being too low, and the forging quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of die forging, in particular to a method for heating a large thin-plate arc-shaped forging before forging. Background technique [0002] In the die forging process, the forging is positioned in the die by its own structure and shape. Before forging, the forging needs to be heated to the initial forging temperature, and then transferred to the die. For large thin-plate arc-shaped forgings with a length or diameter greater than 1m and a thickness less than 3cm, the raw material is a flat plate, which softens during the heating process and deforms into an arc-shaped plate due to the uncontrollable deformation. The shape of the plate does not match the mold, and it cannot be quickly and accurately matched with the mold during transfer. The transfer time exceeds the process requirements, and the initial forging temperature decreases, which affects the surface quality of the forging. If the forging cannot be posi...

AI Technical Summary

Problems solved by technology

For large thin-plate arc forgings with a length or diameter greater than 1m and a thickness less than 3cm, the raw material is a flat plate, which softens during heating and deforms into an arc-shaped plate under the action of gravity. The shape of the plate does not match the mold, and it cannot be quickly and accurately matched with the mold during transfer. The transfer time exceeds the process requirements, and the initial forging temperature decreases, which affects the surface quality of the forging. If the forging cannot be positioned, it will inevitably affect the forming quality of the forging and fail to meet the processing requirements. It will cause forging products to be scrapped

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