机械工程设计CAD解决方案

语言：英语
网址：http://varicad.com
类别：机械工程设计CAD解决方案

（from：NET）
VariCAD是一款适用于机械工程设计的Windows/Linux双平台CAD设计软件，它不仅包含标准的2D工程图绘制和3D建模等功能，还提供了利用参数和几何约束来控制对象、以及创建带有厚度的外壳、创建智能管道、展开曲面、干涉检查、内置ANSI与DIN标准的2D与3D机械零件库等许多实用功能。VariCAD可以创建单独的零件文档以及装配体文档并在它们之间协同工作和同步更新，还拥有创建物料清单以及自动填充2D图纸标题框等功能。VariCAD支持STEP、STL、IGES、DWG和DXF格式的文档。

VariCAD软件简单易用，即使是初学者也可以很快地掌握利用VariCAD来创建设计对象、修改编辑、以及测算和评价设计对象的方法。最重要的是，VariCAD软件是一款“全包形式”的软件，它本身即提供了如上所述从事机械设计所需的全部功能，您无需额外付费购买其它插件，在目前的全球机械工程设计领域，VariCAD堪称性价比最高的CAD解决方案。国外用户形象地称其“值得我们所付的每一分钱”。

2011年7月17日最新发布：VariCAD 2011(1.10)。新版本的VariCAD在针对DWG/DXF文档的兼容性上获得了全面提升、改善并增加了部分2D功能、能够更好地支持Nurbs曲线（渐开线），此外还包括明显改善的用户操作界面和改善的STEP输入功能。

全面提升的DWG/DXF文档兼容性：
● 全面支持自AutoCAD 2011直至AutoCAD R12的DWG文档
● 支持和识别种类更广泛的2D对象、图符
● 可供选择的打开多种图纸空间的方式
● 更加简单而直接的自动检测文档错误功能

改善并增加的2D功能包括：
● 2D填充，包括自动探测填充区域的边界线、编辑已有填充的样式等
● 创建用于3D拉伸、旋转等操作的外轮廓图形
● 2D图形面积测算，可用来测算剖面面积、外轮廓周长、转动惯量以及弯曲系数等
● 支持预定义的2D图块
● 支持预定义的2D符号库
● 全面支持2D的NURBS曲线（渐开线），包括如剪切、拆分、移除线段等
● 更好的2D偏移功能，包括对含有直线、圆或弧、NURBS曲线的多元线的偏移
● 新增的2D编辑功能，包括更直观地编辑直线长度并以此来扭曲对象，更直观地编辑圆或倒角的半径等
● 更加丰富的2D多元线绘制功能选项
● 完善了2D偏移功能
● 完善2D填充绘制、2D填充编辑功能选项

用户操作界面的改善：
● 可以在光标附近动态显示其坐标值，如在2D绘图时显示X/Y坐标值、DX/DY数值、距最后点的角度和间距，或在3D移 ● 动实体时动态显示间距和角度
● 更多的2D定位选项，可在定位操作过程中启用键盘输入数值
● 在2D定位过程中，可以按下TAB键来启用键盘输入数值，从而实现对间距、半径、角度、坐标值等的精确定位
● 在2D或3D定位过程中，可以很方便地通过单击鼠标右键来弹出相应的子功能菜单
● 在对象上单击鼠标右键可以弹出更多的操作功能选项
● 在2D或3D画面空白处单击鼠标右键也可以弹出更多的操作功能选项，如复制与粘贴、重复与撤消、由3D输出的新旧视图切换、编辑2D图块等

STEP文档输入的改善:
● 新增了读取文档时的选项
● 更好的错误分析能力

我们建议您通过“cfg”指令或菜单“工具—系统设置”来对“鼠标右键设置”和“显示光标坐标值”两项新功能进行个性化设定，新版本VariCAD可以将单击鼠标右键的响应进行多种设置，从而更加方便您的操作，这也是本次升级的最明显特征之一

VariCAD 2011 is a 3D/2D CAD system for mechanical engineering. In addition to standard tools for 3D modeling and 2D drafting, the CAD system provides tools for shells, pipelines, sheet metal unbending and crash tests, assembly support, libraries of standard mechanical parts (ANSI, DIN) and symbols, mechanical part calculations and tools for working with bills of materials (BOM) and title blocks. VariCAD supports STEP, STL, IGES, DWG and DXF file formats. User Interface and System Environment VariCAD’s Graphical User Interface (GUI) has been designed to allow quick and intuitive 3D/2D orientation. We carefully tailored and tuned the GUI to reflect the thought process of a designer, so that ideas can be captured and communicated with a minimal number of steps. All commands were created with a focus on ease of use. An intelligent cursor, numerous detection and selection modes, 2D construction lines, and the orthogonal grid are just some of the tools that make working with VariCAD so easy.

You can start by creating a 3D model and then use it to automatically create drawings files, or you can draw only in 2D. Designing in 3D is generally more "natural," in that it closely represents actual parts and assemblies. The 3D approach is usually more intuitive than 2D drafting. Models created in 3D are easily converted into conventional 2D documentation.

3D Modeling
VariCAD provides a library of basic 3D solids (prism, cylinder, cone, etc.), which are easily modified by editing the original profile or parameters. Solids can also easily be created by profile rotation, extrusion, or lofting. More complex tools include rotation blending between two profiles, lofting between a circle and rectangle, and creation of helical surfaces.
Solids can be added or subtracted, thus forming Boolean trees representing real mechanical parts. Boolean operations have options for automatic trimming, or automatic removal of subtracted volumes. Predefined operations like hole drilling, face milling, groove milling and edge beveling/filleting are also available. Boolean trees are very easy to edit.

3D Tools – Assemblies, Groups, Parts etc.
VariCAD also provides tools for assembly support. If the link between a part and assembly is defined, any changes made to the part file are reflected in the assembly file and vice-versa. Linked copies can also be defined. In this case, editing of one object causes all its linked copies to be updated. Solid groups can be defined as well, making selection and visibility changes simple for multiple objects.

Crash Tests (Interferences)
One excellent feature of 3D modeling is component interference checking. VariCAD can check 3D assemblies for possible collisions (overlapping volume) between components.

Calculations
VariCAD can calculate 2D section area, surface area, volume, mass, center of gravity, and moment of gyration. A library of mechanical calculations is also included, for standard parts used every day by mechanical designers. These mechanical parts include tension and compression springs, pre-stressed bolted connections, pins and parallel keys, grooved shafts, bearings, beams under combined stress (bending and torsion), spur and bevel gearing geometry, and belt drives.

Surface Development (Sheet Metal Unbending)
VariCAD can also create developed (flattened) surfaces of 3D solids. The XY coordinates of the developed surfaces can be saved to a text file for further processing. You can input bending coefficients in order to customize your calculations.

Mechanical Part and Symbol Libraries
VariCAD contains libraries of standard mechanical parts (ANSI, DIN), such as bolts, nuts, pins, plugs, cotters, gaskets, bearings, rolled and drawn shapes, and hydraulic, pneumatic, and electronic symbols. You can add items to these libraries or modify existing parts – all 2D and most 3D dimensions can be edited.

Non-graphical information can also be assigned to parts, such as type of material or supplier. This information is incorporated into an assembly and can be used for material requisitions, bills of materials (BOM), title blocks, or other purposes.

3D – 2D Export
3D models are easily converted into 2D drawings to produce conventional drafting documentation. You can create 2D views of one or more selected solids by defining the views in 3D. In addition, you can also export specified sections. VariCAD supports updates of a 2D drawing after changes in 3D.

2D Drawing and Editing
Drawing functions are geared toward easy use in engineering. Some handy features of 2D drawing include: an intelligent cursor that automatically detects objects and snap points, numerous snap modes, flexible item selectability, auxiliary construction lines, ortho mode, rectangular grid, drawing layers (up to 250), block creation, hatching with automatic border detection, advanced dimensioning, surface texture symbols, welding symbols, tolerance symbols, and more. Dimensions can be in millimeters or inches.

BOM and Title Blocks
VariCAD provides tools for maintaining drawing databases, which represent the data structure of the product. Databases can be created manually (using data extraction from the assembly), or by loading a file. There are constraints between data in part and assembly drawing title blocks and the assembly database. You can build a bill of material (BOM) from the database, then easily modify the database using commands like mass attribute changes, sorting of information, etc.

The data structure of the product (BOM) can be exported into other systems or into a spreadsheet. Automatic BOM and title block creation is another one of VariCAD’s useful tools. A mask is used for customization; if you create masks for BOM and title blocks, you can use them until a change is necessary. The CAD system provides default masks which can be adjusted to suit your needs.

Compatibility
VariCAD can interchange files with other CAD systems. You can import STEP (3D), DWG (2D), DXF (2D) and IGES (2D) files, and export STEP (3D), STL (3D), IGES (3D and 2D), DWG (2D), DXF (2D). The files can be converted individually or in batch routines, thereby converting multiple files in one step.

Printing and Plotting
Printing within VariCAD is highly customizable. You can use Windows or KDE Linux printer drivers, or VariCAD built-in drivers. Postscript printing is also available.

Summary
VariCAD is a total CAD solution for mechanical engineering. It is compact, fast, easy to use, and contains everything you need for mechanical engineering design. The high performance and powerful tools of our fully loaded package make VariCAD a superb investment. And at our price, no other product is a better value.

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