Limit forging method of rectangular blank

Abstract

The invention discloses a limit forging method of a rectangular blank. The limit forging method comprises the following steps: sawing off a water feeder head from the rectangular blank, heating and upsetting, wherein the upsetting ratio is 1.5-2.0; turning over the upset blank to be 180 degrees; performing limit widening forging, wherein the limit widening forging is that the ratio of pressed remaining thickness and width after pressing is 0.4-0.35; placing the blank being subjected to limit widening forging into a heating furnace to be heated; taking the heated blank out of the heating furnace; rotating the blank being subjected to the first limit widening forging to be 90 degrees and performing second limit widening forging; shaping the blank being subjected to the second limit widening forging to the set size of the blank of a forging piece; and then performing melting and cooling treatment on the shaped blank. The forging method is strong in generality, low in risk factor, high in working efficiency and good in practicability; and with the adoption of the forging method, a work piece can be forged firmly and pressed thoroughly under the condition that the forging rate is relatively low, so that heating number reduction is facilitated, and the consumption of raw materials and waste of energy sources are reduced.

Description

technical field [0001] The invention relates to a metal forging process, which belongs to the technical field of forging, in particular to a limit forging method of a rectangular blank. Background technique [0002] Tool and die steel is divided into many types according to its use and working environment, but they all have a common feature that tool and die steel has very high hardness, very poor shaping during forging, great forging resistance to deformation, and relatively narrow forging temperature. And it is easy to crack and cause the overall scrap of the forging. Therefore, many forging enterprises are discouraged from forging this type of steel, which greatly restricts the development of tool and die steel. Contents of the invention [0003] The purpose of the present invention is to overcome the defects in the prior art and provide a limit forging method for rectangular blanks with strong versatility, low risk factor, high work efficiency and good practicability....

AI Technical Summary

Problems solved by technology

[0002] Tool and die steel is divided into many types according to its use and working environment, but they all have one common feature: tool and die steel has very high hardness, very poor shaping during forging, great forging resistance to deformation, and relatively narrow forging temperature

And it is easy to crack and lead to the overall scrapping of forgings

Therefore, many forging companies are discouraged from the forging of this type of steel, which has greatly restricted the development of tool and die steel.

Images