A manufacturing process of double "s"-shaped hyperbolic thin-walled parts

Abstract

The invention relates to the technical field of mechanical machining, in particular to a double-S-shaped double-curve thin-walled part manufacturing process. A five-coordinate high-speed mill is adopted to conduct rough machining on an inner curve and an outer curve with ribs and conduct semi-finish machining and finish machining on the inner curve and the outer curve with ribs, and a step cushion block positioning and gypsum filling method is adopted to perform clamping and positioning. The part clamping and positioning problems are solved, and part clamping stability and machining rigidity are improved. Regional segmented and layered machining is adopted for parts, machining deformation of ultra-complicated thin-walled curved surfaces is effectively controlled, the vibration problem in the machining process is avoided, and part size and accuracy are ensured.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a manufacturing process of a double "S"-shaped hyperbolic thin-walled part. Background technique [0002] The double "S"-shaped hyperboloid thin-walled panel is a complex panel of the aircraft, that is, any cross-sectional view along the axis is a double "S"-shaped structure, and the thinnest part of the wall thickness is 1.5mm. In order to increase the structural strength, it is designed on the surface of the curved surface A number of ribs are installed, and the ribs are twisted shapes with coexistence of opening and closing angles. The special double "S"-shaped hyperboloid thin-walled panels have complex shapes and are difficult to process, and there is no reference manufacturing process for this structure. The processing technology of similar curved surface thin-walled parts and the difference from double "S"-shaped hyperboloid thin-walled panels: ①Using sheet ...

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Problems solved by technology

[0004] 1) The part is a thin-walled part with complex curved surface, the profile is a double "S"-shaped hyperboloid, and the curvature changes greatly. It is a major difficulty to formulate a reasonable process plan; 2) The part structure is all space curved surface, without clamping and positioning reference, It is difficult to position and clamp the part, and it is easy to generate vibration during processing; 3) The surface structure of the part is complex, and there are many twisted ribs on the shape surface. Dimensions, shape tolerances, and high surface quality requirements make it difficult to customize the machining sequence, tool selection, programming, and cutting methods of structural parts

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