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猎枪枪管是一种细长、变径的薄壁管件,外形及内孔较复杂,精度及表面光洁度要求较高,材料为30CrNi_2MoV—A,热处理硬度为HRC30～36,采用冷精锻工艺可达到基本不加工。根据枪管成品图的要求及精锻工艺的可能性,并尽量做到少切削,以达到经济效果显著的基础上,确定锻件图与坯件图。本文以大量篇幅阐述如何解决生产中所产生的问题,如孔壁裂纹、表面光洁度等,与工艺参数及工装设计参数选择的关系,并经过长期生产实践的考验与理论分析,可作为薄壁管件及一般精锻工艺的参考。
Shotgun barrel is an elongated, variable-diameter thin-walled tube, the shape and bore more complex, high precision and surface finish, the material is 30CrNi_2MoV-A, heat treatment hardness HRC30 ~ 36, using cold forging process Reached the basic non-processing. According to the requirements of the barrel finished drawing and the possibility of precision forging process, and try to be less cutting, in order to achieve significant economic results, to determine the forgings and blank map. In this paper, a large number of articles on how to solve the problems arising in the production, such as crack wall, surface finish, etc., with the process parameters and tooling design parameters of choice, and after long-term production practice test and theoretical analysis can be used as thin-walled tube And the general precision forging process reference.