Numerically controlled clamping method and milling tool for joint parts
A part and clamping technology, which is applied to the CNC machining clamping method and milling tool field of the main support joint of the aircraft, can solve the problems of not opening the machining slot, difficult design of the milling tool, and impracticality, so as to improve the efficiency of CNC machining , easy to locate and fix, design and manufacture simple effects
Active Publication Date: 2009-06-10
XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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Problems solved by technology
[0003] Usually, the method of processing joint parts is to use vacuum milling tools and use the web surface of the joint for positioning. As the structure of joint parts becomes more and more complex, the processing grooves have become closed, and the web surfaces are relatively close to each other. are also not parallel, and milling tools positioned with web faces are increasingly difficult to design and less practical
For example, it is not feasible to use the existing clamping method and milling tool for the main supporting joint of ARJ21
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[0014] figure 1 The joint part 1 shown is a complex box-shaped structure, and four process positioning platforms 2 are arranged on both sides of the part theoretically (the process positioning platforms are removed after the parts are processed). Each process positioning platform is provided with a connection positioning hole 3, and the connection positioning hole 3 is an inner hexagonal bolt hole in the implementation, such as Figure 4 As shown, make the connecting bolt not higher than the surface of the process positioning table. figure 2 The milling tool includes a milling body 4 and four support blocks 5, the milling body 4 is a stable plate structure, the support block 5 is a columnar structure with a support surface, and the support blocks are respectively fixed on the peripheral positions of the milling body flat plate structure, The connection between the support block and the milling body is fixed by the hexagon socket head cap screw and the split washer. The suppo...
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The invention provides a digital control processing fixture method of parts like complicated joints and a design of a clamp. The main idea is that the joint part is fixtured in suspension. The fixture method is that process positioning stations are arranged on the theoretical shapes of two sides of the part; supporting blocks, which correspond to the process positioning stations and are higher than a milling tool, are arranged on the milling tool; the process positioning stations on the two sides of the part are positioned and fixed on the supporting blocks of the milling tool to make the joint part fixtured in suspension on the milling tool.
Description
technical field [0001] The invention relates to aviation manufacturing technology, directly relates to a clamping and milling tool design method in numerical control machining of joint parts, and in particular to a numerical control machining clamping method and milling tool for various aircraft main support joints. Background technique [0002] At present, with the rapid development of numerical control processing technology and aircraft design technology, many assembled parts on the aircraft are gradually designed into integrated single parts, and these single parts are more and more complex in structure and larger in size. As the largest and most complicated joint on the aircraft, the main support joint is an important stress-bearing part connecting the wing and the main landing gear. It needs to meet the load strength requirements for aircraft take-off and landing, and ensure the coordination of the assembly of the landing gear and the wing. Its material is an ultra-thic...
Claims
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IPC IPC(8): B23Q3/00
Inventor 史靠军周文东段学峰吴峰
Owner XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT