Special-shaped deep-cavity hot-forging precision coupler knuckle die and processing method thereof

Abstract

The invention discloses a special-shaped deep-cavity hot-forging precision coupler knuckle die comprising an upper die and a lower die. Templates of the upper die and the lower die are both cuboids and flexibly connected, cavities of the upper die and the lower die are in the same shape and size, the cavities and a coupler knuckle are of the same shape, and the cavities are positioned at the centers of the templates. Each cavity is formed by enclosing of a plurality of circular arc sections and linear sections so as to form the shape of the coupler knuckle. The invention further discloses a processing method of the die. The processing method includes the specific steps of (1) forging, (2) planer milling, (3) drilling, (4) numeric control milling, (5) heat treatment, (6) finish milling, (7) polishing to remove burrs and sharp corners, and (8) assembling, die assembly, debugging, packaging and acceptance inspection. The die substitutes for an original casting die and a casting process, quality defects of existing coupler knuckle castings are overcome, and accordingly production efficiency and overall performance of processed coupler knuckles are improved.

Description

technical field [0001] The invention belongs to a forging die, which is mainly used for forging and processing a knuckle used for railway trains. Background technique [0002] At present, most of the knuckle production is processed by casting molds, including lost foam, sand mold and so on. Many related researches have been focused on the optimization of casting process and so on. For example, in the eighth issue of "Casting" in 2011, there was an article "Casting Process Simulation and Optimization of Coupler Knuckle" [CLC number: TP391.9 TG24 Document code: B Document number: 1011-4977(2011)08- 0765-04], the article pointed out: "On the basis of the original process, ProCAST casting simulation software was used to numerically simulate the knuckle filling and solidification process for the No. On this basis, the original process has been improved and optimized.” This article comes from the “State Key Laboratory of Material Forming and Die Technology, Huazhong University o...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a special-shaped deep cavity hot forging precision knuckle mold and its processing method, which replaces the original casting mold and casting process, overcomes the quality defects of the existing knuckle castings, thereby improving production efficiency and the overall performance of the processed knuckle

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