13 results about "Section plane" patented technology

The invention discloses a BIM (Building Information Modeling)-based parametric modeling and mapping method for a simply-supported U-shaped aqueduct structure in the technical field of three-dimensional modeling of water conservancy projects, which mainly comprises the following steps of: on the basis of a traditional BIM modeling technology, parameterizing basic physical units such as points, lines, surfaces and bodies of the aqueduct structure; the method comprises the following steps: establishing a parameterized construction model, a pre-stressed steel beam model and a reinforcing steel bar model, checking structural arrangement, steel beam arrangement and reinforcing steel bar arrangement from a three-dimensional angle, checking a relative position relationship among the three parts, then establishing a section cutting plane to form a section map, arranging the drawing according to a specified sequence by utilizing functions of front view, side view, sectioning and the like, and constructing a pre-stressed steel beam model and a reinforcing steel bar model. And a technical rule with an automatic mapping function is formed. When aqueduct structures of the same type and different sizes are modeled subsequently, modeling and drawing of the aqueduct can be completed only by modifying corresponding parameters, design work is greatly facilitated, the method can be matched with a construction side to simplify the design difficulty of construction measures, and therefore forward design of the aqueduct is achieved.

The application discloses a G2 continuous round corner surface generation method. The application comprises the following steps: firstly, determining a boundary curve and a reference curve and sampling to generate a section plane; then, determining G2 continuity information of a section curve according to the position relationship between the current section plane and the boundary curve; using a fifth-order B-spline curve to represent the section curve, and then using a Newton iteration method to optimize and iterate the control points of the section curve, so that the variable acceleration energy of the generated section curve is minimized, thereby obtaining the optimal section curve of the current section plane; repeating the sampling and optimization iteration process, and finally generating a round corner surface according to all the optimal section curves. The application provides round corner surface control parameters which are easy for users to understand, and improves the robustness of the round corner surface; and can be widely used in the scene with higher smoothness requirements for the transition between various surfaces in mechanical manufacturing modeling, such as automobile manufacturing.

The invention provides a milling cutter for machining a complex curved surface, and relates to the technical field of milling cutter design, and the specific steps are as follows: constructing a three-dimensional rectangular coordinate system, and constructing an egg round head revolution surface based on the three-dimensional rectangular coordinate system; uniformly arranging a plurality of blades in the circumferential direction of the milling cutter, generating a blade contour according to a right-handed spiral track, and forming a milling cutter solid model and a to-be-machined complex curved surface by combining preset cutter angle parameters; obtaining a cutter contact track and a sampling point coordinate by adopting a section plane, and deducing and solving a cutter location point motion track by utilizing a tangent relation between an egg round head revolution surface and a curved surface at a cutter contact; the overall design of the egg round head revolution surface and the milling cutter is completed. The variable-curvature revolution surface can be better matched with the concave-convex shape of a complex curved surface, the revolution surface of the egg round head and each cutter contact of the curved surface are precisely attached, compared with a point contact machining mode in the prior art, the problems of over-cutting and under-cutting are effectively solved, and the machining precision and the surface quality of the complex curved surface are improved.

The application discloses a kind of geometric information extraction methods of elbow forming FEM simulation result, first read the node coordinates of elbow forming FEM simulation result, obtain the point cloud data of pipe section node;Acquire pipe end section node;According to section spacing, obtain the next section plane equation, utilize clustering method to obtain the same section node;Using OBB bounding box method obtains section center point;After the above two steps, obtain the center point of all sections, obtain the central point set of elbow FEM simulation result;Obtain the geometric information of elbow axis, section contour.This method can process circular, rectangular and triangular arbitrarily shaped cross-section pipe, and the plastic large deformation condition that exists grid redivision, high in calculation efficiency, accurate and reliable.

A cutting element, which is configured for the machining of a non-metallic composite material composed of a matrix and particles held together by the matrix, has a flank face, a rake face and a cutting edge which is coated with an edge coating and via which the flank face and the rake face are connected to one another, with which the non-metallic composite material can be machined in an improved fashion. The cutting edge within a cutting edge section thereof is curved in such a way that the cutting edge immediately beneath the edge coating in a section in a section plane that is perpendicular to the cutting edge has, at every point of the cutting edge section, a local radius of curvature which is greater than or equal to 10 μm and less than or equal to 80 μm.

The invention relates to a shearing head for machines for cutting a metal strip for the production of armatures of electric motors, in particular axial-flux motors. The head comprises a support plate for a plurality of punches arranged parallel along a first z direction and configured to form an m × n matrix on a section plane perpendicular to said first z direction, with m rows arranged along a second x direction and n columns arranged along a third y direction. The punches are supported so as to be translatable in the x direction, in the y direction, and in the z direction, thereby allowing the selection of a punch Pij to be used for the shearing operation by translating the punch matrix so that said punch Pij is exposed toward the surface of the strip to be sheared and at a certain distance from said strip. The punches are constrained to move in groups in the z direction relative to the support plate so that the translation in the z direction of a punch Pij toward the strip to be sheared with respect to the support plate results in moving an entire row of punches Pi closer to the strip to be sheared. The invention also relates to a machine comprising such a head and to a related cutting method.

The application discloses a kind of parameterized modeling mapping methods of simple-supported U-type aqueduct structure based on BIM in the technical field of hydraulic engineering three-dimensional modeling, mainly by being based on traditional BIM modeling technology, by the basic physical unit such as point, line, surface, body of aqueduct structure is parameterized, parameterized construction model, prestressed steel tendon model and steel bar model are established, can view structure arrangement, steel tendon arrangement and steel bar arrangement from three-dimensional angle, and view the relative position relationship of three, then can form section view by establishing section plane, utilize front view, side view, section cutting and so on Function arranges drawing according to specified order, forms the technical rule with automatic mapping function.Subsequently, when modeling is carried out to the aqueduct structure of the same type and different size, only the corresponding parameters need to be modified, the modeling and drawing of the aqueduct can be completed, which greatly facilitates the design work, and also simplifies the design difficulty of construction measures with the construction party, so that the forward design of the aqueduct is realized.

The invention relates to the technical field of finite element simulation, and discloses a sectioning plane calculation method, a sectioning plane calculation system, sectioning plane calculation equipment and a sectioning plane calculation medium for a multi-physical field calculation result of power equipment, and the sectioning plane calculation method comprises the following steps: screening out a plurality of surface intersection grid units intersected with a target sectioning plane from a target equipment simulation grid model obtained after finite element simulation; and obtaining a model surface intersecting line intersecting with the target sectioning plane in each surface intersecting grid unit, and connecting the model surface intersecting lines in each surface intersecting grid unit end to end to form a peripheral contour boundary, so that only the intersecting lines of the sectioning plane and the peripheral contour units are calculated to obtain the peripheral contour boundary of the intersecting surface. According to the method, the boundary of the peripheral contour is subjected to grid reconstruction by adopting a grid coarsening mode, a triangular grid of the target sectioning plane is generated, and a simulation result value of each grid point in the triangular grid of the target sectioning plane is calculated through an interpolation algorithm, so that the calculation efficiency and the simulation efficiency are effectively improved.

Method for determining dimensional and / or geometric properties of a measurement object (14) using a measuring head (24) which is movable relative to the measurement object (14) in a measurement volume and which is configured to detect selected measurement points on the measurement object (14), comprising the steps: - Moving the measuring head (24) relative to the object being measured (14) according to a first defined measuring path (44) which runs in a first defined sectioning plane (40) of the object being measured (14), and acquiring a plurality of first sectioning plane coordinates (54) along the first defined measuring path (44) using the measuring head (24), wherein the first defined measuring path (44) defines a first direction of rotation (50) around the object being measured (14), - Moving the measuring head (24) relative to the object being measured (14) according to a defined connecting path (46) to a second defined cutting plane (42) of the object being measured (14), - Moving the measuring head (24) relative to the object being measured (14) according to a second defined measuring path (48) which runs in the second defined section plane (42) of the object being measured (14), and acquiring a plurality of second section plane coordinates (56) along the second defined measuring path (48) using the measuring head (24), wherein the second defined measuring path (48) defines a second direction of rotation (52) around the object being measured (14), and - Determining the dimensional and / or geometric properties of the measured object (14) using the first section plane coordinates (54) and the second section plane coordinates (56), characterized in that the connecting path (46) leaves the first defined section plane (40) in the first direction of rotation (50), and that the connecting path (46) enters the second defined section plane (42) in the second direction of rotation (52).

The invention relates to the field of welding process treatment, and provides a sectional view generation method, system and device for a welding system reference structure and a medium, and the generation method comprises the steps: obtaining a reference structure in a three-dimensional model of a welding system; analyzing the obtained reference structure to obtain structure information of the reference structure; according to the structure information, performing axis class judgment on the reference structure to obtain a judgment result; acquiring a position relationship between the reference structure and a preset reference plane to obtain position information; determining a corresponding section plane according to the judgment result and the position information; based on the determined cross section plane, generating a cross section view of the reference structure, taking a welding system three-dimensional model as input, analyzing geometrical characteristics and spatial positions of the reference structure, matching different types of cross section plane calculation rules according to structure types, and finally outputting a two-dimensional cross section view meeting requirements, so that traditional manual repeated operation is replaced; and the working efficiency is greatly improved.

The application discloses a tire, a wheel and a tire processing method. The tire comprises a tread and a shoulder, a sidewall and a lip arranged in sequence along the side of the tread, the lip is used for connecting with a rim, and the outer side of the sidewall is provided with a rim protection part. A plane determined by the axis and the diameter of the tire is used as a section plane, the section plane of the rim protection part is surrounded by a first surface, a second surface and a third surface connected in sequence, the first surface is connected with the outer side of the sidewall, the second surface is smoothly and transitionally connected with the outer surface of the shoulder, and the third surface is smoothly and transitionally connected with the outer surface of the lip. The intersection of the second surface and the third surface is the outermost position of the rim protection part. In the state that the lip is connected with the rim, the distance between the edge of the lip and the outermost position of the rim flange along a first direction is W1, the distance between the edge of the lip and the outermost position of the rim protection part along the first direction is W2, the first direction is parallel to the diameter of the tire, and 2mm<=delta<=3.5mm, delta=W2-W1.

The present application relates to the technical field of model section filling, and particularly relates to a section filling method and system suitable for a triangular mesh model of a complex structure. The section filling method comprises the following steps: S1, calculating a directed line segment intersected by a triangular facet of a model and a section plane and saving the directed line segment to a list ListE1, wherein the directions of the directed line segments corresponding to the inner contour and the outer contour of the model are opposite; S2, mapping the coordinates of the directed line segments in ListE1 to a two-dimensional plane coordinate system in which the section plane is located, to form a list ListE2; S3, based on the angle, interval and overlap times information of the directed line segments in ListE2, extracting the section contour of the model from ListE2 and saving the section contour to a list ListC; S4, determining the contour type of each section contour in ListC, and associating the outer contour and the corresponding inner contour based on the contour spatial relationship; and S5, constructing a triangular mesh based on the associated inner contour and outer contour and reversely mapping the triangular mesh to a three-dimensional space. The present application realizes automatic section filling of a complex model with surface fitting or structure nesting.