CAD/CAM Integration and CAPP Features

A frequently overlooked step in the integration of CAD/CAM is the process planning that have to occur. CAD systems produce graphically oriented data and might go so far as graphically identifying metal, etc. to be removed throughout processing. In order to generate such things as NC instructions for CAM equipment, basic decisions about equipment to be utilized, tooling and operation sequence have to be made. It is the function of CAPP. Without some of the element of CAPP, there would not be such thing as CAD/CAM integration. Therefore, CAD/CAM systems that produced tool paths and NC programs include restricted CAPP capabilities or imply a certain approach to processing.

CAD systems also provide graphically-oriented data to CAPP systems to use to generate assembly drawings, etc. Furthermore, this graphically-oriented data might then be provided to manufacturing in the form of hardcopy drawings or work instruction displays. This type of system utilizes work instruction displays at factory workstations to display process plans graphically and guide employees through assembly step-by-step. The assembly is illustrated on the screen and as an employee steps through the assembly procedure with a footswitch, the components to be assembled or inserted are illustrated on the CRT graphically along with text instructions and warnings for each step.

If NC machining processes are include, CAPP software present which will select tools, feeds and speeds, and prepare a NC programs.