DESIGN/CADCAM 3DIMENSI: Introduction to CAD / CAM #1

Definition of Computer Aided Design (CAD):

Is a system design / design using computer equipment and specific design software, which allows the engineer to plan, model, and evaluate a model of a product / item accurately before production (manufacturing).

Definition of Computer Aided Manufacturing (CAM):

Is a system that automatically capable of producing the product / workpiece (finished product) through the use of computer-controlled machinery.

Why should CAD:

1. The design process requires a long time and the use of paper media perishable and difficult in storage.

2. The process of editing the design on paper or media image means the same as re-drawing process that takes a long time.

3. Equipment design required in making conventional picture very much and expensive (table drawing, tracing, rapido, mechanical pencil, ruler, etc.).

4. Product life cycle (Product Life Cycle) short take rapid product design to be able to compete in the market.

History of CAD Technology

1. The development of computers for design purposes since the beginning of 1960. In the past the field of design using drawing and tracing paper media and used in every school vocational and manufacturing industry.

2. In 1970 the CAD system has become a popular and widely used, but its development is still limited to 2D design.

3. In 1980, drawing a solid technology has become a popular application programs used in the design of CAD (RomulusTM, Uni-Solid Catia).

4. In 1982 Autodesk AutoCad 2D applications issued, then in 1988 introduced Pro Eng with the main feature modeling methods and parameters linked.

5. Beginning in 1990 the world know B-rep solid modeling kernels (application for manipulation of 3D objects topology geometry models), the application is then developed by various manufacturers of CAD applications.

6. Along with the advancement of age began to appear one application program design Solid Work 1995, Solid Edge 1996, IronCad 1998.

Element - the element of CAD

1. Hardware: hardware such as computers and other supporting devices.

2. Software: an application program executed by the computer

3. Data: in the form of structural information / data that are managed by software

4. Man: is the main element of any technological progress. Because the technology is sourced from the fulfillment of human needs.

CAD CAPABILITY

Regardless of the type of work shops do, most find it necessary to have CAD capabilities as well as CAM. Even if a shop receives all its work electronically as CAD files, the programmer often needs to clean up the geometry in order to create the tool paths properly.

Basic functions such as point, line, arc, fillet, spline, chamfer and rectangle creation are essential for creating or modifying any type of geometry. More advanced CAD capabilities, such as surface creation and manipulation, allow you to create complex models from scratch, or to modify existing models to make them machinable. In addition to geometry creation, a good CAD provides features to speed part modeling, such as multiple viewports and construction planes.

Addition CAD features such as surface shading help depict the geometry in a way that is clear and easy to understand.

Many shops prefer a package tha includes both CAD andCAM. Using a tighly integrated CAD/CAM system eliminate the need to translate files between separate CAD and CAMpackages. Since an integrated CAD/CAM system uses a cammon database for both the CAD/CAM information, complete data compatibility is maintained at all times. In addition, this type of CADCAM system shares a common interface, avoiding the problem of having to train programmers on two separate systems.

TOOL PATH EDITING

A good CAM system gives you final control over the tool path so you are not forced to use a tool path you do not want, or use a parameter that the system includes by default. Many systems give you the ability to graphically edit the tool path after it has been generated. This not only gives you final say over exactly what the tool path does, but also gives you the ability to cut, paste, reverse or reorder sections without taking the time to recreate the entire tool path. This also applies to machining parameters such as feeds and speeds. It is important that you are able to change these settings without recreating your entire tool path.

Computer Aided Engineering Tools

Engineering analysis is concerned with analysis and evaluation of engineering product designs. For this purpose, a number of computer-based techniques are used to calculate the product's operational, functional, and manufacturing parameters. Finite element analysis (FEA) is one of the most frequently used engineering analysis techniques. Besides FEA, tolerance analysis, design optimisation, mechanism analysis, and mass property analysis are some of the computer aided techniques available to engineers for the purposes of analysis and evaluation of the engineering product designs.

Introduction to CAD / CAM #1

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DATA TRANSLATOR

WORKSHOP

INJECTION

BLOW MOULD

TOOL PATH VERIFICATION

TOOL PATH EDITING

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FOOTBALL

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