4 results about "Corner radius" patented technology

Embodiments of the present application relate to a kind of elbow-shaped water inlet flow passage parameterization design method, device, equipment and storage medium.The method comprises: according to the preset three-dimensional structure of elbow-shaped water inlet flow passage, four-order Bezier curve is used to fit flow passage three-dimensional space guide line;Wherein, the three-dimensional space guide line is defined by five control points;Five control points are set in the symmetry plane of the elbow-shaped water inlet flow passage, and meet the preset constraint condition;Along the flow passage three-dimensional space guide line, feature cross section is placed at multiple preset positions;Wherein, the feature cross section is perpendicular to the flow passage three-dimensional space guide line, cross section area is continuously contracted along flow direction, and cross section shape gradually changes from the rectangle or rounded rectangle of the inlet of the elbow-shaped water inlet flow passage to the circularity of outlet, and the corner radius gradually increases along flow direction;Based on the feature cross section, continuous smooth flow passage side wall is generated, and three-dimensional flow passage model is obtained.The embodiment of the present application can control flow passage curvature variation, facilitate parameterization optimization.

The invention discloses a method for automatically generating a curled fillet curved surface based on virtual constraint and self-adaptive offset, and relates to the technical field of computer aided design, comprising the following steps: S1, constructing a virtual constraint wall: according to different constraint modes, along a parameter boundary of a basic curved surface, according to a certain height, direction and draft angle, constructing the virtual constraint wall; automatically generating an NURBS curved surface representing physical space limitation, namely a virtual wall; and S2, generating a self-adaptive offset curve: calculating a parallel space curve in a parameter domain according to the current offset near the target boundary of the basic curved surface. The system provided by the invention not only realizes automation of a whole process, but also introduces numerous key design parameters including a fillet radius, a flange height, a scanning angle, geometric attributes of a virtual wall and a constraint mode; in this way, the method can be easily integrated into a product life cycle management or computer-aided engineering optimization process to serve as a reliable link in design of an automation chain.

The application discloses a kind of ultrasonic auxiliary milling force modeling methods suitable for round corner cutter, three-dimensional cutting force measured by cutting force measuring system is converted to the normal force and friction force suffered by tool rake face, and break through the limitation of traditional right-angle cutter model, innovatively introduce the geometric correction to tool round corner radius, decompose cutting edge into linear segment and circular arc segment respectively for mechanical analysis and synthesis, so that the model can more truly reflect the complex stress state of round corner cutter, significantly improve the calculation precision of normal force and friction force, and has fundamental significance for in-depth study of tribological behavior, wear mechanism and chip formation process.

The invention provides a method for acquiring and analyzing surface topography data of a copper foil for nickel sheet convex hull stamping, which comprises the following steps: acquiring initial geometric parameters and material flow characteristic data of a nickel sheet, and analyzing the bidirectional tensile stress concentration degree of a bottom fillet area through stress distribution when the height of a convex hull is increased to obtain a strain concentration index of the bottom fillet area; according to the strain concentration index of the bottom fillet area, determining fillet radius configuration corresponding to the deformation stage through a genetic algorithm; extracting the metal transfer rate of the flange area from the corrected fillet radius configuration, simulating material flow balance from the flange area to the convex hull area, and determining a predicted value of the thinning degree of the bottom of the convex hull; and according to the optimized punch stroke parameters, the risk that microscopic cracks are generated and expanded along the grain boundary is evaluated, and a dynamic punching control sequence is generated.