本文主要目的於研究探討 CNC 保麗龍雕刻機之系統架構與設計規劃。深 究目前的汽車鈑金模具製造業,對於消散模(保麗龍模)的製造,依然是 使用傳統的人工操作。不僅製造效率差,而且精度控制不易。因此,一套 真正 CNC 型、且具量測與雕刻功能的保麗龍製造系統,正是目前工業界 所迫切需要的。文內首先對系統之架構作詳細之設計與規劃,其中共含括 有四大技術要項,分別為機械結構、 CNC 控制器、機台檢驗與誤差量測 補正、及逆向工程型 CAD/CAM 系統等。文中對機械運動機構之設計原理 及精度控制方法等作詳細之論述,並利用有限元素分析法(使用 SDRC 公 司的 I-DEAS CAD/CAE ),來作組合干涉、機構模擬、結構應力應變、及 自然振頻等分析,以檢驗並確保機構設計之正確性。對於 CNC 控制器、 機台檢驗與誤差量測補正、及逆向工程型 CAD/CAM 系統等技術要項亦將 在本文中論述、並將其應用導入本保麗龍雕刻機中,以期系統之實用性及 適用性能達到最高之層次。
The design of a CNC full-mold casting model machine was presented. The full-mold model is an essential intermediate process for making automotive press dies. To date, it is still rely on manual operation which results in low efficie- ncy and accuracy. Therefore, a CNC type full-mold model making machine with multi-functions of measurement and mach- ining is of great demand to the automotive die industry. System design of the machine includes four major subsys- tems. They are mechanical and mechanism design, PC-based CNC controller, static and dynamics precision verification and error compensation, and reverse-type CAD/CAM system. The mechanical and mechanism design was analyzed by the I-DEAS CAD/CAE package for its assembly interference check, mechan- ism simulation, static stresses and deformation, and natural frequency modes. Potential design defects were identified and were improved through parameters studies. Major functio- nal requirements and design specification of CNC controller, error compensation and CAD/CAM subsystems were also surveyed and presented in detail. It is believed that the machine can fulfill its original design purposes.