Tooling and processing method for inner cavity processing of large-scale composite material thin-walled cover parts
A composite material and inner cavity processing technology, which is applied in the direction of stone processing equipment, metal processing equipment, metal processing machinery parts, etc., can solve the impact of dimensional accuracy and shape accuracy that have not been introduced, and the high-precision processing of complex composite material parts has not been proposed, processing Poor accuracy and other problems, to achieve the effect of improving processing accuracy and product quality reliability
Active Publication Date: 2021-11-16
航天科工哈尔滨风华有限公司 +1
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Problems solved by technology
However, the impact of the clamping method on the dimensional accuracy and shape accuracy is not introduced.
The literature "Experimental Research on Drilling and Milling Technology of C / SiC Composite Materials" conducts exploratory research on the selection of drilling and milling tools, the causes and evaluation of typical defects, and the reasonable selection of processing parameters, but the structure of the research object is simple, how to No related method has been proposed to achieve high-precision machining of complex composite material parts
The document "Research Progress in Processing Technology of Silicon Carbide Ceramic Matrix Composite Materials" introduced that the processing of composite material parts can be realized by using traditional mechanical technology, but the surface of the material is subjected to mechanical stress, resulting in poor processing accuracy.
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Embodiment 2
[0038] In this embodiment, a certain type of shroud is taken as an example. Its material is aluminosilicate composite material. The inner and outer turning lines are complex curves, the length is 1100mm, the maximum diameter is 480mm, and the minimum wall thickness is 12mm. The wall thickness requirements Strict, the error is less than ±0.1mm, such as figure 1 shown. The specific steps for the design of the inner cavity processing tooling of the composite thin-walled cover parts are as follows:
[0039] Step 1: Design four support rods, the rods are processed into through holes, the rod length is 150mm, the outer diameter is 50mm, and the inner hole diameter is 20mm;
[0040] Step 2: Design two cylindrical parts with a diameter of 550mm, one with a thickness of 150mm and the other with a thickness of 250mm, and process four blind holes evenly distributed on one side of each part with a diameter of 50mm;
[0041] Step 3: Connect the support rod 3, the cylindrical part 4 and t...
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The invention relates to the technical field of processing tooling for thin-walled cover parts, in particular to a tooling for processing the inner cavity of large-scale composite thin-walled cover parts, including a first clamping tool and a second clamping tool, a first clamping tool and a second clamping tool. The second clamping tool is a cylindrical tool, the first clamping tool and the second clamping tool are arranged coaxially opposite each other, and the two opposite end surfaces of the first clamping tool and the second clamping tool are respectively processed with equal intervals in the circumferential direction. There are four blind holes, and a support rod is arranged in the corresponding blind holes of each two positions, and a through hole is processed inside the support rod, and a set of threaded pull rods are arranged inside each set of support rods, and the threaded pull rods connect the first clamping tool, The second clamping tool and the support rod are detachably fixedly connected; the present invention provides a process method for precision control of the thickness of large composite material revolving curved surface parts by rationally designing the tooling, thereby realizing the improvement of the processing dimensional accuracy and shape accuracy of large composite material thin-walled cover parts , enough to meet the job requirements.
Description
technical field [0001] The invention relates to the technical field of processing tooling for thin-walled cover parts, in particular to a tooling for processing the inner cavity of large-scale composite thin-walled cover parts and a processing method thereof. Background technique [0002] The ceramic matrix composite material is made of ceramic powder and fiber mixed at high temperature and sintered. It is a special ceramic material widely used in the aerospace field. It has good comprehensive mechanical properties and dielectric loss. It is mainly made into a shroud and used in missiles. , hypersonic aircraft, etc., is a multi-functional component that integrates high-performance requirements such as heat protection, wave penetration, load bearing, and impact resistance. The size of the shroud is generally large, the length is greater than 1000mm, the maximum diameter is greater than 450mm, the shape of the turning curve is very complicated, and the wall thickness is small,...
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IPC IPC(8): B23Q3/06
CPCB28D7/04
Inventor 魏士亮翟学智荆君涛刘运凤邱亚楠
Owner 航天科工哈尔滨风华有限公司