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

A processing method and CNC milling technology, which are applied in metal processing equipment, milling machine equipment, manufacturing tools, etc., can solve the problems of difficulty in machining the inner surface of elbow parts, and achieve easy guarantee of machining accuracy, transmission accuracy, and reduction of Effects of cutting shock loads

Inactive Publication Date: 2011-08-31
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 ar

Method used

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

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Embodiment Construction

[0019] The specific embodiments of the present invention will be described in detail with reference to the accompanying drawings and technical solutions. figure 1 It is a schematic diagram of the inner surface processing of the elbow. As shown in the figure, the machine tool spindle directly drives the extended ball nose tool 1 to perform cutting motion. During processing, the cutting movement of the tool is along the circumference of the inner surface of the elbow part 2 to ensure that the centerline of the tool axis always bends. The fixed point of the circle center of the pipe end; after processing the first and second areas I, II of the left end of the elbow, the tool withdraws from the elbow and moves to the right end of the elbow to process the third and fourth areas III, IV , see attached figure 2 ;Specific steps are as follows,

[0020] The specific implementation of the processing object is a typical elbow type part, the structure is symmetrical, the outer surface i...

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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 positioning operation 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 cutting state, 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 machining, and particularly relates to a machining method for machining the inner surface of a bent pipe by using a five-axis numerical control milling machine. Background technique [0002] UG software is a computer-aided design and manufacturing system known for the integration of CAD / CAM / CAE. It has been widely used in aviation, aerospace, automobile, 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 composite surfaces not only improves the efficiency, but also improves the correctness and safety of the program, reduces the production cost, and improves the processing. quality. The processing module of UG software is very powerful, and there are many ways to generate tool paths, such as parallel pass, helical pass, following the periphery of the workpiece and so on. Only by selecting the appropri...

Claims

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Application Information

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IPC IPC(8): B23C3/00G06F17/50
Inventor 王续跃孙建立高航刘巍杨连文
Owner DALIAN UNIV OF TECH
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