Casting and forging method of metal piece, and casting and forging apparatus

Abstract

The invention discloses a casting and forging method of metal piece. The casting and forging method comprises the following steps of putting a metal raw material in a material-placing groove of a die-casting mold, the metal raw material forming a melt state in the material-placing groove; closing a forming mold and the die-casting mold to form an accommodate space; pouring the metal raw material in the melt state into the accommodate space from the material-placing groove; cooling the metal raw material in the melt state to form a first metal piece; placing the first metal piece and the forming mold in a forging mold accordingly; and forging the first metal piece in the forming mold by the forging mold to form a second metal piece. The invention also discloses a casting and forging apparatus of the metal piece. With the casting and forging method and the apparatus, an effect that can be achieved by forging five times with a known forging technology can be achieved in one forging time; tedious processes can be simplified; process time is shortened; and the metal piece has high strength and precision. Moreover, due to the the design of transferring the forming mold together with the first metal piece into the forging mold without replacing the forming mold, a processing reference point can be can further fixed.

Description

technical field [0001] The present invention relates to a metal forming method. Background technique [0002] The common forming methods of metal parts can be divided into die casting forming and forging forming. Among them, die-casting is formed under high pressure, so that liquid or semi-liquid metal is filled into the die-casting mold at a high speed, and formed and solidified under pressure to obtain metal castings. The process is time-consuming and can form a three-dimensional structure through the design of the mold. However, due to the fast filling speed of the liquid metal into the mold, the liquid metal cannot be filled into the mold stably, so that the molded metal casting is likely to have pores, and secondary processing must be performed. In addition, the shrinkage of the formed metal casting is relatively serious, so usually a large processing space must be reserved, and the strength and precision of the formed metal casting are poor. [0003] In addition, fo...

AI Technical Summary

Problems solved by technology

However, the process of using forging is complicated and requires multiple forging treatments. Generally, at least five times of forging are required. After each forging treatment, annealing and lubrication are still required before forging can be performed again, which is time-consuming. long

In addition, if the metal parts after the forging process need to be processed twice by CNC grinding method to form a three-dimensional structure, usually more than two times of CNC grinding processing is required, which is costly

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