基于NX二次开发的塑料模自动生成分型面系统

Automatic Generation Parting Surface System of Plastic Mold Based on NX Secondary Development

摘要: 在塑料模设计中，分型面设计花费时间较长，而且其合理程度决定了分模的成功率，因此我们提出一种基于分型线自动形成分型面的设计方案。首先提出了一种断线重接的分型线优化方法，然后基于最小二乘法原理设计了一个自动切割分型线算法，并将上一步优化好的分型线进行切割，然后我们提出了一种基于规则和实例推理自动生成分型面的算法，将切割后的分型线通过此算法逐个成面，最终将各个碎面缝合为一个整体的分型面。并通过NXOPENC++编程完成以上系统的开发。实例表明，该系统能够极大的提高生产效率，而且自动生成的分型面平整简洁，完全符合加工要求。

Abstract: In plastic mold design, the parting surface design takes a long time, and its rationality determines the success rate of parting. Therefore, we propose a design scheme that automatically forms the parting surface based on the parting line. First, an algorithm for reconnecting broken lines is pro-posed to optimize the parting lines. Then, an algorithm for automatically cutting parting lines is de-signed based on the principle of least squares, and the optimized parting lines in the previous step are cut. Then, an algorithm for automatically generating parting surfaces based on rules and case reasoning is proposed. The cut parting lines are formed one by one through this algorithm, and each broken surface is finally stitched into a whole parting surface. The above systems are developed through NXOPEN C++programming. The example shows that the system can greatly improve the production efficiency, and the automatically generated parting surface is flat and concise, which fully meets the processing requirements.