【正文】 gating system is revised and the process parameters are also regulated, which reduces these defects notably (shown in Fig. 5). In addition, the original scheme often leads to porosity at the hot spot of die castings (shown in Fig. 6). Therefore, in the revised scheme the transition point from the slow shot to plunger acceleration is adjusted suitably, and the pressure buildup time is also shortened, in order that the high pressure can be transferred to the liquid metal at the hot spots in time before the gate solidifies. Thus, the defects of porosity are basically eliminated. The plex shape of the water pump casting and its wall unevenness make the defects of porosity and air entrapment easy to occur, but the demand for the sealing of a die casting of a water pump is very high, and the casting has to pass through a hydraulic pressure test without any leakage. The design of the die casting process is optimized with the help of CAE simulation and analysis, and the percentage of qualified products of die casting is raised greatly in a shorter time. . The realization of CAM On the basis of the data of the 3D solid modeling of the cavities of die casting dies, with the use of the Pro/MANUFACTURING module of the Pro/ENGINEER CAD/CAM software, the 3D solid modeling of blank figures of the inlays are created first. Then the operation table of the machining including the machining parameters, cutters, cutter path, etc. is listed, and the NC (numerical control) cutting procedures and the CL (cutter locate) data files are also created. Furthermore due to the use of the module of an NCcheck, the cutter path in machining is checked and the instantaneous machining process can be visualized. The CL data file of each NC cutting procedure is revised until a satisfactory result is reached. The CAM is realized as soon as these data files are postprocessed and transferred into the NC machine code. The cutter path in the machining of the inlay of die casting dies of housing cover is shown in Fig. 7. 4. Results of the application of integrated system As mentioned above, with the help of the Pro/ENGINEER CAD/CAM software and a primary expert system package, the 3D solid modeling of die casting and the design of technological scheme of die casting process are created. Next the simulation and analysis of metal flow and solidification in dies are performed with the use of the MAGMASOFT software。 Die casting dies。軟件公司已開發(fā)出一種重要的壓鑄模具專業(yè)軟件系統(tǒng)包，它提供了模具和方案設計中的一系列經(jīng)驗計算公式和數(shù)據(jù)。 關鍵詞： CAD/CAE/CAM 集成系統(tǒng)、壓鑄模具、金屬流動和凝固的數(shù)值模擬 介紹 壓鑄件的應用正在不斷擴大。在并行工藝過程中，第一步是創(chuàng)建零件生產(chǎn)過程中所用到的所有方面3D 數(shù)據(jù)庫。由于在整個過程中使用的是同一三維模型的數(shù)據(jù)庫，以上這些步驟可以同時進行。它包括一個CAD/CAM 軟件 ,一個 CAE 仿真軟件和一個壓鑄專業(yè)軟件系統(tǒng)包。金屬液在模具型腔里的流動速度和鑄件的溫度分布以及金屬液在模具中的填充和凝固過程可以通過計算得出。 CAD/CAE/CAM 集成系統(tǒng)在壓鑄模具中的應用 、模具的 CAD 建模和設計的技術(shù)方案 首先新建零件的三維實體造型，然后通過使用 Pro/ENGINEER 的 CAD/CAM軟件進行壓鑄件的三維建模，建模的內(nèi)容有鑄件的加工余量，收縮率和錐度的形成（如圖 2 所示）。然后選擇 壓鑄機。它包括一個漸開線輪廓，具有不同高度的槽，彎曲的過渡區(qū)域連接著不同橫截面的球體狀拱，所有這些都給建模造成很大麻煩。然后對幾種技術(shù)方案的模擬結(jié)果進行分析。為了減輕這種缺陷，需要對澆注系統(tǒng)的設計進行修改，工藝參數(shù)也要進行相應調(diào)整，（如圖 5 所示）。由于油泵復雜的外形和不均勻的壁厚，導致縮孔和氣孔等缺陷很容易出現(xiàn)。然后，制作一個加工工藝表，包括加工余量，刀具，刀具路徑等，同時還要創(chuàng)建一個 NC（數(shù)控）切割程序和 CL（銑刀）數(shù)據(jù)文件。壓鑄模具外殼蓋的鑲嵌加工刀具路徑如圖 7 所示。最后創(chuàng)建模具和型芯復雜表面的 CAM 加工數(shù)據(jù)，所有 CAM 加工數(shù)據(jù)都在數(shù)控機床上完成。 另一個例子是汽車變速箱殼體的鎂合金壓鑄件。 結(jié)論 壓鑄模的 CAD/CAE/CAM 集成系統(tǒng)目前已成功地應用在汽車壓鑄件的設計和制造中，如油泵，變速箱殼體等壓鑄零件。然而，該集成系統(tǒng)還需要進一步研究和開發(fā)，特別是專業(yè)軟件