夏克祥,姜春茂,刘海艳,等.弹体毛坯热冲拔工艺[J].精密成形工程,2017,9(2):102-106.
XIA Ke-xiang,JIANG Chun-mao,LIU Hai-yan,et al.Heat Drawing Process of Bullet Workblank[J].Journal of Netshape Forming Engineering,2017,9(2):102-106. |
| 弹体毛坯热冲拔工艺 |
| Heat Drawing Process of Bullet Workblank |
| 投稿时间：2016-12-27 修订日期：2017-03-10 |
| DOI：10.3969/j.issn.1674-6457.2017.02.021 |
| 中文关键词: 弹体毛坯 冲拔 成形 设计 |
| 英文关键词: bullet workblank drawing forming design |
| 基金项目: |
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| 摘要点击次数: 4887 |
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| 中文摘要: |
| 目的 设计弹体毛坯热冲拔成形工艺方案。方法 将冲子压入加热后的钢坯，使钢坯在压力作用下充满模腔，压成盂形，然后套在引伸冲子通过一串直径逐渐缩小的模圈，使弹体拉长、直径减小、壁厚减薄，获得合理的弹体毛坯尺寸，生产出合格毛坯。分析弹体毛坯冲拔成形原理、温度控制、工装设计及冲拔过程中的金属流动规律，根据体积不变原理，计算出冲拔毛坯尺寸。结果 通过批量试制，根据冲拔过程中常见问题的控制措施，优化了冲拔工艺参数，实现了弹体毛坯热冲拔成形。结论 通过冲拔原理分析、毛坯及工装设计，形成了热冲拔设计规范，该弹体毛坯热冲拔工艺可行。 |
| 英文摘要: |
| The work aims to design a program for hot drawing forming process of bullet workblank. The punch was pressed into heated billet so that the mold cavity was full of billet under pressure. The billet was pressed into a glenoid shape and fit on a stretch punch to elongate bullet and reduce diameter as well as wall thickness by a string of mold necks with decreasing diameter. Reasonable size of workblank was obtained and qualified workblank was produced. Forming theory, temperature control, tooling design and law on metal flow of drawing process of workblank drawing were researched. The size of drawing workblank was calculated according to the principle of constant volume. Technological parameters of drawing were optimized and hot drawing forming of workblank was achieved according to the trail-production and control measures for common problems in the drawing process. Design specifications on hot drawing are formed according to analysis of drawing principles and design of workblank and tooling. The hot drawing process of workblank is feasible. |
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