基于特征技术的注塑模具型腔设计制造系统

Feature-based mold cavity design and manufacturing system

针对一般注塑模具型腔设计制造周期问题,构建了基于特征技术的注塑模具型腔设计制造系统.该系统采用基于特征库的交互式特征识别方法识别产品中的特征,建立产品的特征模型.通过侧凹特征的判别确定模具的优化脱模方向,并确定模具的分型线和分型面.模具型腔可采用分型面分割模板的方法获取.同时提出了模具型腔特征提取算法来提取模具型腔中的特征,制订模具型腔的加工策略.研究结果表明,该系统可以有效缩短模具型腔设计制造周期,加快模具开发的进程.

Aiming at the problem of development period in general mold cavity design and manufacturing process, a feature-based injection mold cavity design and manufacturing system was constructed. By using the interactive feature-library-based recognition method, product features were recognized and the feature model of product was built. The optimization parting direction was determined after all undercut features were distinguished, and the parting line and parting surface were confirmed accordingly. The mold cavity was obtained by splitting mold base in parting surface. A feature extraction algorithm was used to extract the features in mold cavity, and the manufacturing strategy was formulated based on these features. Re sults show that the system can shorten the development period of mold cavity design and manufacturing, and promote the development process of mold design and manufacturing.