Large-curvature overall skin deformation machining process
A deformation processing and large curvature technology, which is applied to metal processing equipment, workpieces, manufacturing tools, etc., can solve problems such as large curvature, small radius, and impossibility of milling and cutting
Active Publication Date: 2016-11-23
JIANGXI HONGDU AVIATION IND GRP
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Problems solved by technology
The overall skin of a certain project is a double curvature part, with large curvature, small radius and steep shape change. During the mirror milling process, the milling cutter arm collides with the skin, which makes the milling process impossible
Method used
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Embodiment Construction
[0028] Examples of prior art:
[0029] The overall skin of a certain project is a hyperbolic part, with large curvature, small radius and steep shape change (see figure 1 ), during mirror milling, the milling cutter arm collides with the skin (see figure 2 ), making milling impossible. Using the design technology of the digital model of the skin transition process, the curvature of the digital model of the part is changed and the digital model is reconstructed to solve the actual problem of the collision between the milling cutter arm and the skin. Applying mirror image processing technology to small aircraft skin manufacturing greatly improves the overall skin processing quality of small aircraft and shortens the overall skin manufacturing cycle.
[0030] The invention is a digital-analog design technology of an integral skin deformation processing technology. Using the CATIA working environment platform to redesign the digital model of the product, aiming at parts with d...
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The invention belongs to the technical field of airplane manufacturing, and particularly relates to a technique for establishing a transition process mathematical model for large-curvature, small-radius and steep-shape-changing parts. The technique is applicable to small aircraft overall skin as well as the processes for achievement of a mirror milling weight-reducing area, window cut-through, trimming, drilling and the like. According to the technique, a product mathematical model is subjected to process redesign. For the double-curved, large-curvature, small-radius and steep-changing parts with concave-convex shapes, a convexity-preserving and fairing transition process mathematical model of which R is greater than 600 mm is established by changing the curvature of curved shape surfaces of small aircraft overall skin parts and reconstructing the characteristics of mathematical model parts on the basis of the same weight of parts, the same arc length and the same curved surface area. By adoption of the technique, the manufacturing requirements for such working procedures as achievement of the part numerical-control milling weight-reducing area, drilling and trimming can be met.
Description
technical field [0001] The invention belongs to the technical field of aircraft manufacturing, and specifically relates to a large curvature, small radius, and steep shape change part transition process digital model establishment technology, which is suitable for the overall skin of small aircraft, mirror milling and cutting weight-reducing areas, cut-through windows, and cut-outs. Edge and drilling and other processes. Background technique [0002] The mirror image milling processing equipment is widely used in the milling and weight reduction area, window cutting, edge trimming and drilling of C919 large aircraft skin parts, realizing the accurate, efficient and green manufacturing of large aircraft skins. The purpose of this technology is to implement the large aircraft skin mirror image processing technology in the overall skin manufacturing of small aircraft with characteristics such as hyperbolic curvature, large curvature, small radius, and steep shape changes. The ...
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IPC IPC(8): B23C3/16
CPCB23C3/16B23C2215/04
Inventor 吴跃珍谢飞雷玉如唐大友
Owner JIANGXI HONGDU AVIATION IND GRP