How do CAD and CAM work together to prepare a CNC machining program?

In modern manufacturing, computer-aided design (CAD) and computer-aided manufacturing (CAM) function as an integrated system to streamline the production of parts on CNC machine tools.21

The process typically follows these steps:

• Design Phase: Designers use CAD software to create and analyze three-dimensional models of a component. This allows for the examination of the design from various angles and cross-sections before finalizing dimensions.1
• Data Digitization: Once the design is complete, the data is stored in a numerical (digitized) format.1
• Part Programming: The CAD and CAM systems are linked through computer-assisted part programming. The CAD system generates a geometrical profile of the component, often represented as a series of connected points.1
• Tool Path Calculation: The computer calculates the necessary movements required for the machine tool to reach these points. It then develops a complete machining program—often in the form of control tapes or disks—that provides the direct instructions for the CNC machine to manufacture the part.21

This integration reduces development time and optimizes production flow by considering manufacturing requirements during the initial design stage.21