Die-forging forming die and method for ultra-large square elbow

Abstract

The invention provides a die-forging forming die and method for an ultra-large square elbow, and belongs to the technical field of die-forging forming. The die-forging forming die for the ultra-large square elbow comprises a first die used for die-forging forming and a second die used for in-die upsetting blank making; the first die comprises a bottom die, an upsetting rod and a punching rod; a die-forging impression matched with a square elbow blank material in outline shape is arranged in the bottom die; the upsetting rod is used for stretching into the die-forging impression to conduct in-die upsetting; the punching rod is used for stretching into the die-forging impression to conduct punching operation; the bottom die comprises an outer die, an inner die and a side plug matched with the inner die; the side plug is embedded in the end of the inner die; and the inner die and the side plug are sleeved with the outer die. According to the die-forging forming die and method, the product quality level, the quality stability and the material yield of square elbow forged pieces can be increased, the service stability of the forged pieces is greatly improved, and the service life of the forged pieces is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of die forging, in particular to a die forging die for a super-large right-angle elbow and a die forging method. Background technique [0002] As my country's energy demand increases year by year, nuclear power, as a clean energy source, has achieved rapid development in recent years. Small nuclear power reactors have the advantages of small initial investment and short manufacturing cycle. The main pump connecting pipe forging is a right-angle elbow forging connecting the pressure vessel and the main pump. It is oversized and complex in shape, making it difficult to manufacture. [0003] The main pump nozzle manufacturing method in the prior art generally uses die-cast steel ingots to manufacture the main pump nozzle through the free forging process, but there are the following defects: [0004] On the one hand, the smelting and pouring of die-cast steel ingots takes a long time, which increases the number...

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