Friday, July 6, 2007

Sekilas Tentang SolidWorks

SolidWorks
From Wikipedia, the free encyclopedia

SolidWorks is a 3D computer-aided design (CAD) program that runs on Microsoft Windows platforms, developed by SolidWorks Corporation, a subsidiary of Dassault Systèmes, S. A.. It was introduced in 1993 by newly-founded SolidWorks Corporation to compete with products such as Pro/ENGINEER and SDRC I-DEAS (now Unigraphics NX) among many others, and is now part of the midrange CAD market.


The SolidWorks approach

SolidWorks uses a feature-based "parametric" approach to modelling and assembling. In the SolidWorks 3D modelling environment the creation of a solid or surface typically begins with the definition of topology in either a 2D or 3D sketch. The topology defines the connectivity and certain geometric relationships between vertices and curves both in the sketch and external to the sketch. To this topology are added dimensions which determine the lengths and sizes for the curves and locations for the vertices in conjunction with topological constraints. The dimensions which are added are termed "parameters" because they can be changed either independently or by "parameters" created prior to their creation. The dimensions are limited "parameters" because they cannot be varied by subsequent actions on the sketch in which they are defined. An example of this limitation is to create a simple rectangle in a 2D sketch, place dimensions on the sides of the rectangle and then to extrude the 2D sketch to form a parallel piped shape. The sketch dimensions cannot be varied based on the location of the 2D sketch (generatrix) along the extrusion length. SolidWorks would not allow the height "parameter" of the rectangle to vary with the square of the distance extruded. In other words the dimensions or "parameters" cannot be parametrized to "parameters" created in the subsequent hierarchy of features. Parameters are therefore fixed in the feature that contains them. SolidWorks is therefore hierarchical in the creation of features in that subsequent features should have no effect on prior features. To create volume and modifications, SolidWorks employs a feature-based system that can be rolled back to previous states in case something must be changed or multiple configurations of the same part must be handled. To assemble components, mates are created, which define the relative positions of the components to each other.


Parts

Parts are modelled following a feature-based approach. A sketch must be created first in order to define the primary geometry of the part.


Drawings

Drawings can be created either from parts or assemblies. They are drawn automatically, just by clicking on the window that contains the part or assembly to draw. The drawing module includes most paper sizes and standards (ANSI, ISO, DIN, GOST, JIS, BSI and GB).

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