資料介紹

• CAD輔助設計軟件工具

MegaCAD是一套功能優良的計算機輔助設計軟件,該軟件由德國Megatech Software BMGH公司研制開發,MegaCAD提供中文界面、圖標菜單、鼠標操作、漢字提示;支持DOS、Windows、WindowsNT、LAN、UNIX及各種打印機、繪圖儀和顯示器等硬件,內存僅占640K,在所有286以上的微機上均可運行。 MegaCAD提供Meofig模塊,供用戶定義自己的熱鍵,MegaCAD所有命令都可以用熱鍵表示。MegaCAD提供47種尺寸標注方法,既可標注機械尺寸,又可標注建築圖紙尺寸。


MegaCAD特別提供三維功能,可以有四種投影方式,可任意定義視角。利用MegaCAD的3D圖標,可以方便地生成軸側圖,還能為零件上色,共16種顏色可供選擇。 MegaCAD提供"宏"的功能,用戶無需編程,依舊能夠做圖庫,所見即所得,而且MegaCAD的宏用圖標表示,用戶可將已有圖形的全部或部分當成"宏"分門另類地加以保存,供隨時調用,表示"宏"的文件名可以有32個字長,足以表達零件的字特征。用MegaCAD提供的零件自動生成功能,可自動搜索本裝配圖所有零件並統計數量,以每個零件的數據庫中自動提取文字信息填入定義好的格式中。

MegaCAD被包括建築業、制造業、繪圖、造船業和土木工程等在內的多種行業的設計部門采用。

為了滿足公司客戶的實際需求，Megatech 希望MegaCAD具有以下功能：沿3D輪廓的圓角、變半徑圓角以及在一個模型中可以同時進行曲面造型和實體造型。














MegaCAD 3D is the ideal synthesis of an innovative solid and surface modeling system and a full-feature 2D drafting program. If you are developing your model in 3D or if you are drawing a 2D design, each step will automatically be transferred from one dimension into the other one.

In MegaCAD 3D, the user has a powerful solid modeling system. In addition, any designs can be wholly or partly implemented in the surface modeler. Because they share a common data structure, the two forms of model can be combined. This makes it possible, for example, to trim a solid object with a complex free-form surface, to give the solid a new shape. Conversely, the surface of a solid body can be isolated as a separate surface.

Functions

Innovative technologies

MegaCAD 3D provides very fast algorithms for the shaded display of surfaces and solids, and to remove hidden lines from the display. The designer can work directly in this 'hidden lines removed' mode. Unlike when working with other systems, where the user has to invoke the hidden line calculation repeatedly after each drawing task, the MegaCAD operator always has a clear overview, even with larger drawings.

Flexible tree structure enhanced by local operations
MegaCAD saves all operations in a tree-like structure, a so-called 'feature tree'. The sequence in which procedures are applied can later be changed in any required way, leading to automatic recalculation of the component concerned. However, such a recalculation is not always necessary. Many changes can be restricted to local operations, applied directly to the component to be edited.

Object-oriented parametric
MegaCAD 3D provides for parametric objects. A simple mouse click can be used to assign new dimensions to any of the basic mathematical objects, such as spheres, cubes, cylinders, etc. Solid objects which are connected to the object which has been changed can, if required, be adjusted automatically.

This parametric approach extends to prismatic extrusion objects and sweep objects along a (curved) line in space. 2D drawings produced using MegaCAD can be parameterized in whole or in part, with any dimensions which are not defined being automatically regarded as constant. Geometric dependencies are also taken into account. If such a solid forms the base of an extrusion solid, then the latter is also recalculated.

Variable blends / rounding
The enhanced blending function allows the edges of solids to be rounded with a variable radius, and for this radius to be later altered locally or removed.

Thin wall objects
The shelling function is used to generate automatically a thin-walled shell from a full solid. It is possible in the same operation to remove one or more closing surfaces from the shell. This function is not limited simply to regular objects, but can also be applied to solids whose surfaces have been formed by trimming against a freeform surface.

Full-featured 2D drafting program
While other CAD programs lay emphasis on editing the 3D model, and only offer rudimentary 2D processing functions, MegaCAD can here show off its full strength. In MegaCAD 3D, all the drawing tools of the current version of MegaCAD 2D are available for further editing work on two-dimensional drawings derived from the 3D model.

Integrated working in 2D and 3D
MegaCAD allows 2D drawings and 3D models to be worked on in an integrated way. Any required 2D views can be produced from a 3D model, and if the latter is amended the 2D views can, if required, be automatically updated.
If desired, two-dimensional views can be used to generate a 3D solid object with no further work by the user.

Data interchange
Apart from direct data interchange with the over 170 CAD/CAM applications which, like MegaCAD, are based on ACIS, MegaCAD permits data to be imported and exported through fully-developed interfaces (HPGL, DXF, DWG , WMF, CDL, IGES , STEP, VDAFS and SAT).

Relational Assembly parts
MegaCAD provides a fully relational link between the assembly drawing and the associated parts. Parts can be integrated into an assembly drawing relative to the absolute coordinate system or relative to other parts or elements of the assembly. As an example, if an original component part is modified, the changes will be reflected in the assembly drawing and if a component part is changed in the assembly drawing, this will be reflected in the orthographic drawing. This bi-directional association serves to reduce errors, improve quality, accelerate manufacturing cycles and ultimately cut costs.