Numerical control machining method for sector section and annular section parts
A processing method and annular segment technology are applied in the field of NC machining of sector segments and annular segment parts, which can solve the problems of difficult clamping, high requirements on the accuracy of inner arc surface roundness, and difficulty in manufacturing, and achieve parts clamping and machining. Convenience and quick programming
Inactive Publication Date: 2013-11-13
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
[0002] In the field of aero-engine and other processing, there are many sector parts. These parts are formed by precision casting, and the processed parts are left with a machining allowance of 3mm to 5mm according to the processing needs. The main processing is the upper and lower end faces, left and right sides, inner and outer arc surfaces , The outer end face and hole of the boss, its structural characteristics are that the diameter of the complete set of sectors is large, the roundness accuracy of the inner arc surface is high, and the clamping is difficult; the usual CNC machining method is to assemble several same parts into an assembly clamp For turning and milling on ring fixtures, for some parts with large arc diameters, it is necessary to manufacture corresponding large-diameter fixtures. Not only the fixtures are expensive and difficult to manufacture, but also need to use large CNC lathes and expensive large milling machine
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Embodiment
[0037] Embodiment: the size of sector part is as follows:
[0038] See figure 2 , R1=880.28mm, R=870.28, β=15.667;
[0039] The numerical control processing method of sector section and ring section parts of the present invention, carry out according to the following steps:
[0040] 1) Determine the part datum
[0041] First draw a line on the raw material of the part, and then check the state of the raw material of the part, and then carry out rough milling on the upper and lower end faces of the raw material of the part, and determine the lower end face of the part after rough milling as the axial reference;
[0042] 2) Inner arc surface of turning parts
[0043] Place the axial reference of the part on the ring fixture, and position the lower part of the inner arc surface of the part, and at the same time press the upper end surface of the part tightly; the turning process is divided into two stages, rough and fine, and the rough turning process first removes 70% ~80% m...
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The invention discloses a numerical control machining method for sector section and annular section parts. In the numerical control machining method, a single part is clamped on a fixture, and a zero-point position of a numerical control program is not set at a central axis of a circular arc surface; the part and the fixture can be placed at a position where the part and the fixture can be conveniently machined; a large-scale annular fixture or a large-scale machine tool are not needed to be manufactured; large-diameter sector section and annular section parts are machined by a medium-sized numerical control machine; and the part is convenient to clamp and machine, and a numerical control program can be compiled quickly.
Description
technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and relates to a processing method of mechanical parts, in particular to a numerical control processing method of sector and ring segment parts. Background technique [0002] In the field of aero-engine and other processing, there are many sector parts. These parts are formed by precision casting, and the processed parts are left with a machining allowance of 3mm to 5mm according to the processing needs. The main processing is the upper and lower end faces, left and right sides, inner and outer arc surfaces , The outer end face and hole of the boss, its structural characteristics are that the diameter of the complete set of sectors is large, the roundness accuracy of the inner arc surface is high, and the clamping is difficult; the usual CNC machining method is to assemble several same parts into an assembly clamp For turning and milling on ring fixtures, for some parts with larg...
Claims
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IPC IPC(8): B23P13/00
Inventor 周代忠师俊东郑忆南
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION