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After determining the processing technology, you should understand before programming: 1. Workpiece clamping method; 2. The size of the workpiece blank-in order to determine the processing range or whether it needs to be clamped multiple times; 2. The material of the workpiece-so as to choose which tool to use for processing; 3. What are the stocked tools? To avoid modifying the program when there is no such tool during processing, if you must use this tool, you can prepare it in advance.

The machining program list is one of the contents of the CNC machining process design, and it is also a procedure that needs to be followed and executed by the operator. It is a specific description of the machining program. The purpose is to let the operator clarify the content of the program, the clamping and positioning method, and the location of each machining program. The selected tool should pay attention to the problems and so on. In the machining program list, it should include: drawing and programming file names, workpiece names, clamping sketches, program names, tools used in each program, the maximum depth of cutting, processing properties (such as roughing or finishing), theory Processing time, etc.

For cnc milling, a carbide end mill or end mill that does not regrind should be used. In general milling, the second pass is used as much as possible. The first pass is best rough-milled with an end mill to continuously pass along the surface of the workpiece. The width of each pass is recommended to be 60%-75% of the tool diameter. End mills and end mills with carbide inserts are mainly used for machining bosses, grooves and box surfaces. Ball knives and round knives (also known as round nose knives) are often used to process curved surfaces and variable bevel profiles. The ball cutter is mostly used for semi-finishing and finishing. Round knives with carbide tools are mostly used for roughing.