The CNC gantry type milling machine can process complex shapes and features, and is used for machining molds, inspection tools, thin-walled complex surfaces, artificial prostheses, and blades. Suitable for flat and beveled surfaces for large workpieces in batch and mass production. CNC gantry milling machines can also process space surfaces and some special types of parts. What are the milling methods for CNC gantry type milling machines?
The type of blank should be determined according to the material, shape and size of the part. The order of machining parts should be determined according to all technical requirements such as dimensional accuracy, surface roughness and heat treatment, as well as the type, structure and size of the blank.
That is to determine the machine tool, workpiece clamping method, processing method, measuring method and processing size used in each process.
For CNC gantry type milling machine parts, the appropriate surface should be selected as the positioning base on the machine tool or fixture. The blank surface as the first process positioning base surface is called a rough base surface. The machined surface is referred to as the fine base surface as the positioning base. The main fine surface should be completed first.
For surfaces with high precision requirements, it is generally necessary to finish the workpiece after rough machining. This can eliminate the deformation caused by the clamping force, the cutting heat and the internal stress during rough machining, and also facilitate the arrangement of the heat treatment process. In large-scale production, roughing and finishing are often carried out on different machine tools, which is also conducive to the rational use of high-precision machine tools.
In single-piece, low-volume production, the relevant surface with positional accuracy requirements should be finished in one setup as much as possible. The milling process of CNC portal milling has these principles.
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