锻压技术

金属流速数值模拟技术在消除热模锻锻件折叠缺陷中的应用

英文标题：Application of numerical simulation technology for metal flow velocity in eliminating folding defect of hot die forgings

作者：王飞金朝晖徐宝国宋加兵

单位：安徽安簧机械股份有限公司

关键词：热模锻折叠金属流动流速变化流速倍差

分类号：TG31

出版年,卷(期):页码：2022,47(9):45-50

摘要：

通过数值模拟技术分析了坯料在热模锻成形过程中的金属流速变化，对锻造折叠等缺陷位置的金属流速变化进行了分析和总结，得到流速倍差与锻造折叠等缺陷之间的联系。利用此联系，从流速倍差角度分析了热模锻成形过程中所遇到的折叠等缺陷问题，对圆盘类锻件和转向节锻件等热模锻锻件折叠问题的解决进行了生产验证。结果表明：通过模具优化、控制模温和润滑等环境因素，影响热模锻成形过程中的流速倍差变化，从而可以解决热模锻锻件的折叠等缺陷问题。在热模锻锻件成形过程中，良好的金属流动性、均匀的流速变化、较小的流速倍差关系，有益于热模锻成形，能够避开锻造折叠等缺陷；反之，金属流动过于剧烈、紊乱，流速倍差变化大，锻件形成折叠等缺陷的可能性变大。

The metal flow velocity change of billet during hot die forging process was analyzed by numerical simulation technology, the metal flow velocity change at the forging folding and other defect positions was analyzed and summarized, and the relationship between multiplied difference of flow velocity and forging folding and other defects was obtained. Then, using this connection, the problems of folding and other defects encountered in the hot die forging process were analyzed from the multiplied difference of flow velocity, and the solution to the folding problems of hot die forgings such as disc forgings, steering knuckle forgings and so on were verified by production. The results show that the folding and other defect problems of hot die forgings can be solved by environmental factors such as mold optimization, control of mold temperatures and lubrication, etc. to affect the change of multiplied difference of flow velocity in the hot die forging process. Thus, in the forming process of hot die forgings, good metal fluidity, uniform flow velocity change and small multiplied difference of flow velocity are beneficial to the hot die forging and avoid forging folding and other defects. On the contrary, if the metal flow is too violent and turbulent, and the multiplied difference of flow velocity changes greatly, the forming possibility of folding and other defects for forgings becomes greater.

基金项目：

王飞（1986-），男，学士，工程师 E-mail：3408wangfei@163.com

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