This is a CNC machining process used in making large machine parts. It is a subtractive process like conventional CNC machining, but it is not as straightforward. In this process, the computer directs different machine tools to remove parts from a large workpiece during the machining process.
There are four main steps to the Large CNC machining process;
Design Creation Through Computer-Aided Design (CAD) software
This first step involves creating a model design of the Large machine part. This model could be either 2D or 3D. Software is used for this process, with design dependent on product requirements. CAD model design shows operator critical features and other features necessary for effective machinings like tolerance, threads, and construction lines.
Conversion of CAD files into Numerical Codes The CNC equipment can Digitally Read
Since CNC machines do not understand CAD models, it becomes imperative to convert the model to a format they can interpret effectively. This conversion involves the use of CAM software.
This software converts CAD models to CNC-compatible formats and instructs the CNC machine on machining parameters such as cutting sequences. Other instructions include rotational and linear movement, toolpath, machine speed, and the workpiece.
Preparation and Positioning of the Tooling and Workpiece
Having transformed the CAD models into codes, the next step in the process is preparing for machining. Preparation involves selecting the adequate CNC machine for the process, choosing the tooling, and configuring operations.
The type of CNC machine and process chosen depends on design complexity, budget, and workpiece material.
Automated Part Generation
This is the final step in CNC machining. It involves beginning the machining process. However, before kick-starting the process, it is important to carry out one final check to ensure the attachment of important cutting tools.