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The processing of CNC boring machine is mainly a machine tool that uses a boring tool to boring holes on the workpiece. Usually, the rotation of the boring tool is the main motion, and the movement of the boring tool or the workpiece is the feed motion. Its machining accuracy and surface quality are higher than those of drilling machines. CNC boring machine is the main equipment for processing large box and shell parts.

Boring, milling is an inner diameter cutting process in which a tool is used to enlarge a hole or other circular contour. Its applications generally range from semi-roughing to finishing, and the tools used are usually single-edged boring tools (called boring bar tools).

Unlike normal workpiece turning and milling operations, the clamping of thin-walled hollow workpieces requires the use of a chuck with low distortion and safety. When turning thin-walled hollow parts, clamping distortion can cause the specified tolerance range to be exceeded and the workpiece to become scrap. The choice of chuck is therefore very important. Balanced clamping jaws offer the advantage that, with an optimum arrangement of the clamping points, the deformation of the workpiece can be reduced to 10% of the original deformation, while the clamping force of the chuck remains constant.