Five-axis NC (numerical control) milling method for internal surfaces of bent pipes

Abstract

The invention relates to a five-axis NC (numerical control) milling method for the internal surfaces of bent pipes, particularly relates to a method for machining the internal surfaces of bent pipes by using a five-axis NC milling machine, belonging to the field of NC processing. The method is implemented based on UG software, and used for machining the internal surfaces of bent pipe components by using five-axis NC machining equipment and lengthened ball cutters. The method comprises the following steps that: before the internal surfaces of bent pipe components are machined, the operations of carrying out division on processing regions, carrying out planning on cutter paths, and carrying out interference processing on cutter shafts and workpieces are performed; a clamping and positioningoperation is performed on processed bent pipe components; and the cutting operation of the cutter in the process of machining is performed along the circumferential directions of the internal surfaces of bent pipes so as to always guarantee that the central line of the bent pipe passes through the circle center of an end of the bent pipe. The method disclosed by the invention is stable in cuttingstate, good in surface quality, and high in efficiency, and breaks through the limitation that special equipment is necessary to be used. By using the method disclosed by the invention, the interference problem existing in processing the internal surfaces of bent pipes is solved, and the cutting impact load is effectively reduced, therefore, the method is suitable to be used for machining bent pipe components with a large diameter ratio and a large angle of bending.

Description

technical field [0001] The invention belongs to the field of numerical control processing, and in particular relates to a processing method for processing the inner surface of an elbow by a five-axis numerical control milling machine. Background technique [0002] UG software is a computer-aided design and manufacturing system known for its integration of CAD / CAM / CAE. It has been widely used in aviation, aerospace, automobiles, general machinery and other fields. As a high-end CAD / CAM software, the application of UG in multi-axis CNC machining of various curved surfaces or compound surfaces not only improves the efficiency, but also improves the correctness and safety of the program, reduces production costs, and improves the processing efficiency. quality. The processing module of UG software is very powerful, and there are many ways to generate tool paths, such as parallel tool path, spiral tool path, following the surrounding of the workpiece, and so on. Only by selecti...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art, especially the technical problem that it is very difficult to machine the inner surface of bent pipe parts

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