What Is a CAD/CAM System?
A CAD/CAM System is a system for processing data created by CAD into a NC program that controls computer-controlled machine tools.
Depending on the type of machining, some systems use 2D data and others use 3D data. While it is possible to program a machine tool directly by taking into account the size and movement of tools while looking at drawings and other data, the CAD/CAM system can be used to automatically create accurate programs quickly.
Uses of CAD/CAM Systems
Today, many machine tools are equipped with numerical control (NC) units, and it is common practice to create NC programs for machining operations. CAM systems are used to create these.
The CAM system can also simulate tool movements before machining, and detect unmachined conditions and machining errors in advance.
Other uses include the ability to predict machining times to a certain degree, which can be used for quick quoting and scheduling of machine tools.
Principles of CAD/CAM Systems
A CAD/CAM system consists of a main processor and a post processor.
The main processor sets the type of machine to be used, the tool geometry (type and diameter), and creates the tool travel path by calculating how the tool will be machined according to the geometry read from the CAD. The created data is called CL (Cutter Location) data.
Post processors create NC programs to match the CL data to the machine tool to be used. However, because the coordinate axes used by different manufacturers differ, and because it also includes manufacturer-specific options, complete code unification has not been achieved. Therefore, post processors have a database of major machining centers, and NC data is generated based on this database.
By following these two processes, a machine tool can operate without problems no matter which manufacturer’s CAD/CAM system is used.
Other Information on CAD/CAM Systems
1. The Difference Between CAM and CAD
CAM and CAD are easily confused, but the work process and the purpose of the work are different.
CAD systems are used for designing and drafting; in two dimensions, lines and arcs are drawn on a flat drawing; in three dimensions, a three-dimensional model is represented as a rectangle or sphere; CAM systems are used for manufacturing based on drawings designed by a CAD system; CAM systems allow for manufacturing CAM systems allow for the movement of manufacturing opportunities, but do not allow for the creation of blueprints, so it is necessary to develop knowledge in both areas.
Advantages of CAD/CAM System
Since design and manufacturing are performed by the system, the data can be saved and used for similar manufacturing. Also, by simulating on the system, errors can be detected before manufacturing on the machine, leading to a reduction in waste.
In addition, the system can handle complex machining that would be difficult to perform by hand because it can control simultaneous machining, such as 4-axis machining, while preventing interference between each axis. This allows even inexperienced workers to be involved in manufacturing, thereby eliminating unevenness in quality, leading to improved quality and elimination of human resource shortages.
The benefits of introducing this system are great for companies regardless of the size of their business, as it will lead to increased work efficiency and cost reductions.