University of Nevada Las Vegas

MEG426/626 Manufacturing Processes

Department of Mechanical Engineering

Fall Semester 2000

　

　

CAD/CAPP/CAM

　

　

Computer Aided Design (CAD): using graphic-based computer software to generate mechanical drawings.

To replace manual drawing,

To add in designer_s knowledge and experience,

Using standard commercial software.

CAD includes geometric modeling, engineering analysis, design review and evaluation, and automated drafting.

　

Computer Aided Process Planning (CAPP): using computer software to decide which processes and methods should be used and in what sequence, to determine tooling requirements, to select production equipment and systems, and to estimate costs of production for the selected processes, tooling and equipment.

Typical Processing Sequence:

      1. a basic process, usually roughing cut,

      2. one or more secondary processes,

      3. operations to enhance physical properties, and

      4. finishing operations.

Two common CAPP systems

      1. retrieval CAPP systems (variant CAPP systems),

      2. generative CAPP systems.

　

Computer Aided Manufacturing (CAM): using computer software generating NC codes to machine workparts, and to provide tool and fixture design.

　

Created by Dr. Wang