The invention discloses a positioning optimization method on basis of blade type part deformation in adaptive machining. The method comprises the following steps of: firstly, obtaining a parameter expression of detection section lines (as shown in the specification) according to n design section lines which are distributed along a stacking shaft direction in parallel in a blade design model; secondly, establishing a multi-target function of positioning optimization and establishing constraints during multi-target optimization solution; and finally, carrying out optimization solution, and achieving the aim of finding a target machining curved surface in a preform through optimizing the shapes of design model section lines. According to the method, the target machining curved surface is found in a constraint area by taking non-uniform profile tolerance of a blade profile as a geometric constraint condition, so that the subsequent blade profile detection requirements are satisfied and the product yield is improved. The positioning optimization method disclosed by the invention allows the design section lines to deform in the constraint area and ensures that the shapes of the detection section lines are closest to the shapes of the design section lines, so that the ability of finding the machinable curved surfaces is improved.

Positioning optimization method on basis of blade type part deformation in adaptive machining

The invention relates to the ship manufacturing auxiliary tooling technology field and especially relates to a variable data measurement device used for measuring curved surface sheet material or section bar data precision. The device comprises a bendable measurement sample band, several measuring bars successively arranged on the measurement sample band in parallel and reference rods successively connected to the several measuring bars. Through fitting the bendable measurement sample band and a curved surface to be measured and reference surfaces determined by the reference rods, readings of the measuring bars on the reference surfaces are successively acquired and further a radian and other data of the curved surface to be measured are obtained. Because the measurement sample band can be bended and adapts to many shapes of curved surface sheet materials or section bars and measurement to changeable data is realized, a problem of wood waste during manufacturing of a lot of wood sample bands in the prior art is solved and reutilization can be achieved. It is not needed to speed a lot of time to make the sample bands so that measurement efficiency and a standardization degree are greatly increased.

Variable data measurement device

The invention discloses a method for modeling the spreading of a 3D space deformed film waved sheet The method includes the following steps: firstly, successively drawing n cross sections with a solidworks 3D software according to a drawing, conducting lofting boss modeling on the n cross sections to obtain a space deformed sheet model, drawing n reference planes on the basis of the model, forming n-1 auxiliary cross sections for the model and each reference plane through a cross curve command, lofting adjacent cross sections and the auxiliary cross sections to obtain a lofting entity, selecting three end points of the lofting entity to form an auxiliary reference plane, projecting the lofting entity to a corresponding auxiliary reference plane to obtain a 2n-2 2D blanking drawing, and optimizing the 2n-2 2D blanking drawing with a 3D software to obtain a blanking drawing of the space deformed film curved sheet

Method for modeling spreading of 3D space deformed film waved sheet

The invention provides a modeling method of a complex skin part springback compensation process model. The modeling method comprises the steps of aiming at a complex skin part with variable camber, extracting a base outline reference plane of the skin part, dispersing a curve surface along part forming direction section lines to obtain a dispersing line segment set capable of representing the outline of the part, carrying out sprinkback compensation on each section line and reconstruct a profile by compensated section lines, so as to form the springback compensation process model. According to the modeling method provided by the invention, forming accuracy of the part is improved, model manufacturing cost is reduced, and sheet metal part production quality is improved.

Modeling method of complex skin part springback compensation process model

The invention discloses a generation method of an inner model curve face of a wing wall panel; the inner model data of the wall board is stored in Excel format by a self-defined format; through original data, accurate wall board, beam, and long truss inner model face are formed rapidly according to appointed method; when the wing appearance is a ruled surface or a dual-curve face, and the thickness of the inner model face between every two long trusses is changed linearly along an expanding direction, the inner model curve face of wing wall panel is generated by step one; when the wing appearance is a ruled surface or a dual-curve face, and the thickness of the inner model face between every two long trusses is changed nonlinearly along the expanding direction, the inner model curve face of wing wall panel is generated by step two; when the thickness of the inner model face is nonlinearly changed along the ruled surface or the dual-curve face, the inner model curve face of the wing wall board is generated by step three. The method greatly improves the molding efficiency and precision of the inner model of the wall board.

Generation method of inner model curve face of wing wall panel

The invention belongs to the field of industrial design and particularly relates to a three-dimensional modeling method for a thickness-variable curved-surface part inner shape surface. The three-dimensional modeling method is characterized by comprising the following steps: in an outer shape curved surface range, a parallel plane group and an outer shape curved surface are crossed to obtain one group of outer shape section lines; in each plane, an inner shape section line corresponding to the outer shape section line is established; all the inner shape section lines are connected in sequence to form an inner shape curved surface; whether the distance between the inner shape curved surface and the outer shape curved surface meets the design requirements or not is checked; if the deviation is too great, a crossed plane can be partially increased, and the steps are repeated until the deviation of the inner shape curved surface is reduced to meet the requirements. The thickness change of parts established by the technical scheme is uniform, the curvature of the inner shape curved surface is smooth, and the problem that the thickness change of thickness-variable curved-surface parts is not uniform is completely solved.

Three-dimensional modeling method for thickness-variable curved-surface part inner shape surface

The invention discloses a method for establishing a flexible three-dimensional part model database. According to a specific three-dimensional modeling requirement, a standard three-dimensional part template is established, then through matching of a new profile and a modeling reference, the part template generates adaptability deformation, and a new part needed by a user is generated. According to the invention, a standard modeling process is solidified to a three-dimensional template and is transmitted to a user part, such that the design period is shortened, and the modeling process is standardized.

Fan Haidong

Papers

Three-dimensional modeling method for thickness-variable curved-surface part inner shape surface

Method for establishing flexible three-dimensional part model database