CN112329138A - Spherical shell structure generation method and device, storage medium and electronic equipment - Google Patents

Spherical shell structure generation method and device, storage medium and electronic equipment Download PDF

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Publication number
CN112329138A
CN112329138A CN202011179710.7A CN202011179710A CN112329138A CN 112329138 A CN112329138 A CN 112329138A CN 202011179710 A CN202011179710 A CN 202011179710A CN 112329138 A CN112329138 A CN 112329138A
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Prior art keywords
spherical body
spherical
supported
determining
support
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CN202011179710.7A
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Chinese (zh)
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韩品连
罗浩源
张坤
石鹏飞
常晶
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Shenzhen Yidong Aviation Technology Co Ltd
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Shenzhen Yidong Aviation Technology Co Ltd
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Priority to CN202011179710.7A priority Critical patent/CN112329138A/en
Publication of CN112329138A publication Critical patent/CN112329138A/en
Priority to PCT/CN2021/136257 priority patent/WO2022089665A1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/005—General purpose rendering architectures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
    • G06T17/205—Re-meshing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/10—Additive manufacturing, e.g. 3D printing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

Abstract

The invention discloses a spherical shell structure generation method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a space region corresponding to a part to be manufactured, and filling a spherical body in the space region based on a spherical body filling rule; determining spherical bodies to be supported based on the positions of the spherical bodies in the space region; determining a target spherical body which provides a supporting growth point for the spherical body to be supported in each spherical body in the space region; and adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured. The spherical body is automatically added in the space area of the part to be manufactured to mention the solid structure inside the part, so that the part is lightened, the unsupported spherical body is supported, the material increase manufacturing process is met, the problem that the whole part structure is influenced due to the manufacturing failure of any spherical body is avoided, and the production precision of the spherical shell structure is improved.

Description

Spherical shell structure generation method and device, storage medium and electronic equipment
Technical Field
The embodiment of the invention relates to the technical field of component manufacturing, in particular to a spherical shell structure generation method and device, a storage medium and electronic equipment.
Background
In the field of aviation, the weight of each part on the aviation equipment is an important factor influencing the weight of the aviation equipment, and currently, a technical support is provided for realizing the weight reduction of the part through an additive manufacturing technology.
However, since the structure of each component is not a regular shape, it is limited by the manufacturing difficulty and the defects of the production method, and thus, it is impossible to reduce the weight of the aircraft component.
Disclosure of Invention
The invention provides a spherical shell structure generation method, a spherical shell structure generation device, a storage medium and electronic equipment, and aims to realize generation of a weight-reduced component structure.
In a first aspect, an embodiment of the present invention provides a spherical shell structure generation method, including:
acquiring a space region corresponding to a part to be manufactured, and filling a spherical body in the space region based on a spherical body filling rule;
determining spherical bodies to be supported based on the positions of the spherical bodies in the space region;
determining a target spherical body which provides a supporting growth point for the spherical body to be supported in each spherical body in the space region;
and adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured.
In a second aspect, an embodiment of the present invention further provides a spherical shell structure generating apparatus, including:
the spherical body filling module is used for acquiring a space region corresponding to a part to be manufactured and filling a spherical body in the space region based on a spherical body filling rule;
the spherical body to be supported determining module is used for determining the spherical body to be supported based on the position of each spherical body in the space region;
the target spherical body determining module is used for determining a target spherical body which provides a supporting growth point for the spherical body to be supported in each spherical body in the space region;
and the support adding module is used for adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured.
In a third aspect, an embodiment of the present invention provides a computer device, where the computer device includes:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the spherical shell structure generation method according to any embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a spherical shell structure generating method according to any embodiment of the present invention.
According to the technical scheme provided by the embodiment of the invention, the weight of the component is reduced by automatically adding the spherical bodies in the space area of the component to be manufactured to improve the solid structure in the component, and further, for the unsupported spherical body, at least one target spherical body for providing support is determined, and the support is arranged between the target spherical body and the spherical body to be supported, so that the material increase manufacturing process is met, the problem that the whole component structure is influenced due to the manufacturing failure of any spherical body is avoided, and the production precision of the spherical shell structure is improved.
Drawings
Fig. 1 is a schematic flow chart of a spherical shell structure generation method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a spherical body in a spatial region according to an embodiment of the present invention;
FIG. 3 is a two-dimensional schematic view of a target spherical body according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a spherical shell structure generation method according to a second embodiment of the present invention;
FIG. 5 is a schematic illustration of a stress distribution of a component to be fabricated according to an embodiment of the present invention;
FIG. 6 is a two-dimensional schematic diagram of a spherical volume generation process provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a spherical shell structure generating device according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a server according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic flow chart of a spherical shell structure generating method according to an embodiment of the present invention, which is applicable to a case of generating a spherical shell structure with a support for a component to be manufactured, and the method can be executed by a spherical shell structure generating apparatus replaced by the embodiment of the present invention, and specifically includes the following steps:
and S110, acquiring a space region corresponding to the part to be manufactured, and filling the spherical body in the space region based on a spherical body filling rule.
The part to be manufactured may be any part on the aircraft equipment, and the spatial region to which the part to be manufactured corresponds may be determined based on the dimensions of the part to be manufactured or by introducing a model of the part to be manufactured. For example, the technical solution provided by this embodiment is implemented on a mathematica platform. The space region corresponding to the part to be manufactured may be a three-dimensional space constructed based on the three-dimensional size information of the part to be manufactured, or may be constructed based on a pre-stored three-dimensional model of the part to be manufactured, for example, by importing the pre-stored three-dimensional model of the part to be manufactured. The size of the spatial region corresponding to the component to be manufactured may be the same as the three-dimensional size of the component to be manufactured, or may be larger than the three-dimensional size of the component to be manufactured, which is not limited in this respect. Accordingly, after filling the spherical body, the expanded spatial region is cut out to meet the three-dimensional size of the part to be manufactured.
The spherical body is a spherical shell structure with a certain thickness, the spherical body is filled in the space region to form an internal structure of the part to be manufactured, and the solid structure in the space region is replaced, so that the part to be manufactured is lightened. Wherein, the spherical body is a hollow ball structure with a certain thickness. The sphere has good mechanical property, simple mathematical expression and stable structure, and can disperse the extremely high stress at the stress concentration position through the contact between the spheres. By filling the spherical body in the space region of the component to be manufactured, the original solid structure is replaced by the hollow spherical body on the basis of ensuring the mechanical structure of the space region, and the weight reduction of the component to be manufactured is facilitated.
The spherical body filling rule comprises a spherical body generation position determination rule, a spherical body parameter determination rule and a spherical body verification rule in the space region, and is used for generating a plurality of spherical bodies in the space region so as to realize automatic filling of the space region. Illustratively, referring to fig. 2, fig. 2 is a schematic diagram of a spherical body in a spatial region according to an embodiment of the present invention.
It should be noted that, in the process of filling the spherical bodies, a spherical element list is set for recording the coordinates of the center point of each spherical body in the spatial region and the parameters of the spherical body, where the parameters of the spherical body include the radius of the spherical body and the thickness of the spherical shell.
And S120, determining the spherical body to be supported based on the position of each spherical body in the space region.
The spherical shell structure of the part to be manufactured generated in the embodiment is used for solid manufacturing through an additive manufacturing mode, such as a powder laying 3D additive manufacturing mode. Due to the process problem of additive manufacturing, the manufacturing of a structure without support cannot be realized in the additive manufacturing process, so that the manufacturing failure of parts is caused, and therefore, for a plurality of spherical bodies in a space structure, the spherical bodies to be supported without support are screened, the support is added to the spherical bodies to be supported, and the manufacturing precision of the spherical shell structure is improved.
The spherical body to be supported in the spatial region is determined based on the additive manufacturing direction. In this embodiment, any direction of the component to be manufactured may be selected as the additive manufacturing direction, the number of spherical bodies to be supported corresponding to each additive manufacturing direction is determined, and the additive manufacturing direction with the smallest number of spherical bodies to be supported is screened as the final additive manufacturing direction. Alternatively, the plane of the part to be manufactured may be selected as the substrate, and the additive manufacturing direction may be a direction perpendicular to the substrate.
For any additive manufacturing direction, a three-dimensional coordinate system can be established based on the additive manufacturing direction, the center point coordinates of each spherical body are converted into the three-dimensional coordinate system, and whether each spherical body is a spherical body to be supported or not is judged based on the converted center point coordinates. Optionally, it is determined whether there is support at the lowest point of each spherical body in the three-dimensional coordinate system, if so, there is support for the spherical body, and the support information of the spherical body is recorded, for example { (ball element) (support 1) (support 2) (… }, where the support for one spherical body may be multiple. If the lowest point of the spherical body in the three-dimensional coordinate system is not supported, the spherical body is determined to be a spherical body to be supported, and the ball elements or the identification information of the spherical body to be supported is stored.
Optionally, the determining the spherical body to be supported based on the position of each spherical body in the spatial region includes: for any spherical body, determining whether the distance between the position of the lowest point of the current spherical body and the positions of the central points of other spherical bodies is smaller than or equal to the radius of the other spherical bodies; if not, determining that the current spherical body is the spherical body to be supported. Because the support between the spherical bodies is realized by the tangency or intersection of the two spherical bodies, the distance between the lowest point of the current spherical body and the center point of the adjacent spherical body is correspondingly verified, if the distance between the position of the lowest point of the current spherical body and the positions of the center points of other spherical bodies is larger than the radius of other spherical bodies, the position of the lowest point of the current spherical body is independent of other spherical bodies, the other spherical bodies do not provide support, and the current spherical body is the spherical body to be supported. Correspondingly, if any other spherical body meets the distance condition, the current spherical body has support.
The lowest point position of the current spherical surface body may be determined based on a center point coordinate of the current spherical surface body and a sphere radius, and specifically, the lowest point coordinate is obtained by subtracting the sphere radius from a coordinate value of the additive manufacturing direction in the center point coordinate. For example, if the additive manufacturing direction is the Z-axis direction in the three-dimensional coordinate system, then the central body coordinate of the current spherical body j is (Djx, Djy, dz), the sphere radius is Djr, the central body coordinate of any other spherical body i is (Dix, Diy, dz), and the sphere radius is Dir, and accordingly, the following formula can be used to determine: (Dix-Djx)2+(Diy-Djy)2+(Diz–Diz+Djr)2>Dir2。
S130, determining a target spherical body which provides a supporting growing point for the spherical body to be supported in each spherical body in the space area.
In this embodiment, the process problem of the spherical body to be supported in the manufacturing process is solved by increasing the support of the spherical body to be supported. The target spherical body for providing the supporting growing point is at least one spherical body, and can be one or more spherical bodies which are positioned in the area below the spherical body to be supported along the additive manufacturing direction.
Optionally, determining a target spherical surface providing a supporting growth point for the spherical surface to be supported in each spherical surface in the spatial region, including: for any spherical body to be supported, at least one other spherical body relative to a preset area of the spherical body to be supported is determined based on the additive manufacturing direction. And judging whether the other spherical bodies are target spherical bodies which provide supporting growing points for the spherical bodies to be supported or not based on the coordinate information of the other spherical bodies and the coordinate information of the spherical bodies to be supported.
Specifically, at least one other spherical body in a predetermined area relative to the spherical body to be supported is determined based on an additive manufacturing direction, and the method comprises the following steps: and determining a local area adjacent to the spherical body to be supported in the negative direction of the additive manufacturing direction, wherein the local area comprises at least one other spherical body.
In a three-dimensional coordinate system in which the additive manufacturing direction is located, for example, the additive manufacturing direction is a Z-axis direction in the three-dimensional coordinate system, based on a Z-coordinate of the spherical body to be supported, the local region may be a region smaller than the Z-coordinate in the spatial region, or a local region in a region smaller than the Z-coordinate. And sequentially judging whether each spherical body in the local area has a target spherical body. And if the target spherical bodies do not exist or the number of the existing target spherical bodies does not meet the requirement, expanding the local area until the target spherical bodies exist or the number of the target spherical bodies meets the requirement.
In some embodiments, the spatial region is three-dimensionally gridded based on the additive manufacturing direction, and the spherical bodies in each grid are correspondingly written into a three-dimensional array, where the size of each unit grid in the three-dimensional grid may be predetermined, for example, determined based on an average sphere radius of the spherical bodies, may be the average sphere radius, or a multiple of the average sphere radius, and the like, which is not limited herein. The additive manufacturing direction may be one direction of three-dimensional meshing. Each element in the three-dimensional array corresponds to the three-dimensional grid one by one, and the ball element information of the spherical body in one grid is written into the corresponding position of the three-dimensional array according to the coordinate of the central point of the spherical body. The central point coordinate of the spherical body is positioned in the grid, and the spherical body can be determined to be positioned in the grid. The three-dimensional number may comprise a plurality of elements, any of which may be represented as (x)j，yj，zj) Wherein the Z direction may be an additive manufacturing direction. In three-dimensional gridA grid of (2) may include one or more spherical bodies and may not include any spherical bodies.
Wherein, in the negative direction of the additive manufacturing direction, the determining of the local area adjacent to the spherical body to be supported includes: and determining a dimension corresponding to the additive manufacturing direction on the basis of the position of the spherical body to be supported in the three-dimensional array, wherein the negative direction of the additive manufacturing direction is a local area adjacent to the spherical body to be supported. Specifically, a variable parameter k is set, wherein k is a positive integer greater than 0, and if the spherical body to be supported is located on an element (x) in the three-dimensional numberj，yj，zj) The local area may be determined based on a variable parameter, the X-direction of the local area being from Xj-kTo xj+kIn the Y direction from Yj-kTo yj+kIn the Z direction from Zj-kTo zj. Where k may be 1. And if the target spherical body in the local area does not meet the requirement, expanding the local area by increasing k, namely, assigning k to k + 1.
Due to the fact that the process manufacturing difficulty exists in the material adding manufacturing process, whether the spherical body in the local area is the target spherical body of the spherical body to be supported or not can be judged through the manufacturing capability of the current process. Optionally, judging, based on the coordinate information of the other spherical surface bodies and the coordinate information of the spherical surface body to be supported, whether the other spherical surface bodies are target spherical surface bodies which provide support growing points for the spherical surface body to be supported, includes: determining an included angle between a connecting line of the lowest point of the other spherical surface body and the lowest point of the spherical surface body to be supported and the additive manufacturing direction based on the coordinates of the lowest point of the other spherical surface body and the coordinates of the lowest point of the spherical surface body to be supported; for example, referring to fig. 3, fig. 3 is a two-dimensional schematic diagram of a target spherical body according to an embodiment of the present invention, where a spherical body a is a spherical body to be supported, a point a is a lowest point position of the spherical body a, and for a spherical body B, a point B is a lowest point of the spherical body B, the spherical body B is located in a local area corresponding to the spherical body a, and an included angle α between a connection line of the point B and the point a and an additive manufacturing direction is determined. And judging whether the included angle alpha meets a safe growth angle, wherein the safe growth angle can be determined according to the current additive manufacturing process capability and can be set according to the additive manufacturing process capability change. For example, the safe growth angle may be less than or equal to 45 degrees, and in some embodiments, may be less than or equal to 40 degrees, which is not limited thereto.
If the included angle meets the safe growth angle of additive manufacturing, and any spherical body does not exist on the connecting line of the lowest point of the other spherical bodies and the lowest point of the spherical body to be supported, determining that the other spherical bodies are target spherical bodies for providing supporting growth points for the spherical body to be supported; correspondingly, if the included angle does not meet the safe growth angle of additive manufacturing, or at least one spherical body exists on a connecting line of the lowest point of the other spherical body and the lowest point of the spherical body to be supported, it is determined that the other spherical body is not a target spherical body which provides a supporting growth point for the spherical body to be supported.
And circulating the target spherical body determining mode, and judging each spherical body in the local area to determine the target spherical body of each spherical body to be supported. Optionally, the number of the target spherical bodies of each spherical body to be supported may be 1 to 3, and may be determined according to the stress intensity requirement of the spherical body to be supported, where the greater the stress intensity requirement, the greater the number of the target spherical bodies. The number of the target spherical bodies to be supported can also be set according to the supporting angle of the target spherical body, i.e. the included angle α, the smaller the supporting angle of the target spherical body is, the smaller the number of the required target spherical bodies is, and correspondingly, the larger the supporting angle of the target spherical body is, the larger the number of the required target spherical bodies is. The number of the target spherical bodies may be a mapping relation with the support angle, the minimum value of the support angle of each target spherical body is determined, and the number of the required target spherical bodies is determined based on the mapping relation between the minimum value of the support angle and the number of the target spherical bodies.
In some embodiments, if there are a plurality of target spherical bodies to be supported, the support angles may be used to perform sorting (sorting from small to large), and a predetermined number (e.g. 1-3) of spherical bodies with smaller support angles (a predetermined number of sorted front spherical bodies) are screened as the final target spherical body.
In some embodiments, if there is no target spherical surface body providing a supporting growth point for the spherical surface body to be supported, or the number of the target spherical surface bodies does not reach a preset number, the spherical surface body parameters of the spherical surface body to be supported are adjusted, or the spherical surface body to be supported is removed from the spatial region, so that the problem that the manufacturing failure of the unsupported spherical surface body in the additive manufacturing process affects the component structure is avoided.
And S140, adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured.
In this embodiment, the additive manufacturing process is satisfied by adding a support to the spherical body to be supported, where the support is disposed between the target spherical body and the spherical body to be supported, the support may be, but is not limited to, a linear support, an arc support, and a curved support, and the cross-sectional shape of the support includes, but is not limited to, a circle, an ellipse, and a polygon. The support type can be determined according to the position relationship (such as the support angle) of the target spherical body and the spherical body to be supported, for example, when the support angle is smaller than a preset angle, a linear support can be set, and when the support angle is larger than the preset angle, an arc support or a curve support can be set.
Optionally, adding a support between the target spherical body and the spherical body to be supported includes: determining the intersection point of the connecting line of the lowest point of the target spherical body and the lowest point of the spherical body to be supported and the outer surface of the target spherical body as a supporting growing point; and determining structural parameters of support based on the support growing point and the lowest point of the spherical body to be supported, and setting the support of the target spherical body and the spherical body to be supported according to the support parameters. Illustratively, referring to FIG. 3, point m on the spheroid B in FIG. 3 is the supporting growth point. The calculation result can be obtained by the calculation of the segment ab and the spherical body parameters of the spherical body B. The structural parameters of the support are determined based on the support growth point, the support end point (i.e. the lowest point of the spherical body to be supported) and the type of support. If the support type is a linear support, the structural parameters comprise a support growth point, a support end point and a section size; if the support type is an arc support, the structural parameters comprise a support growth point, a support end point, a support circle center, a support radius and a section size. The cross-sectional dimension can be determined based on the stress intensity requirement of the position of the support, and is positively correlated with the stress intensity requirement.
Taking fig. 3 as an example, the supporting circle center of the arc support is based on the intersection point of the lowest point of the spherical body to be supported and the extension line of the center point, and the center point of the target spherical body and the extension line of the supporting growth point, and the supporting radius is the distance between the supporting circle center and the supporting growth point. The supporting circle center and the supporting radius can be obtained by calculation based on the parameters of the spherical body.
It should be noted that, if the support is an arc support and the cross section of the support is circular or elliptical, the radius of the arc support should be greater than the radius of the circular cross section or the radial half-axis length of the elliptical cross section. Correspondingly, after adding support between the target spherical body and the spherical body to be supported, the method further comprises the following steps: if the support is an arc support and the cross section of the support is circular or elliptical, whether the radius of the arc support is larger than the radius of the circular cross section or the length of a radial half shaft of the elliptical cross section is judged. If not, adjusting the structural parameters of the support.
And circulating the arrangement mode of the supports, and adding the support to each spherical body to be supported to obtain the spherical shell structure of the component to be manufactured. The spherical shell structure produced in this example may be produced based on an additive manufacturing direction, resulting in a manufactured part. It should be noted that, based on the additive manufacturing process and further weight reduction of the component to be manufactured, at least one opening may be provided on each spherical body to discharge the manufacturing powder in the spherical shell during the additive manufacturing process.
According to the technical scheme of the embodiment, the weight of the component is reduced by automatically adding the spherical bodies in the space area of the component to be manufactured so as to mention the solid structure in the component, and further, for the unsupported spherical body, at least one target spherical body for providing support is determined, and support is arranged between the target spherical body and the spherical body to be supported, so that the material increase manufacturing process is met, the problem that the whole component structure is influenced due to the manufacturing failure of any spherical body is avoided, and the production precision of the spherical shell structure is improved.
Example two
Fig. 4 is a schematic flow chart of a spherical shell structure generation method provided in the second embodiment of the present invention, which is detailed on the basis of the second embodiment, and the method includes:
s210, a space area corresponding to a part to be manufactured is obtained, a preset number of random points are generated in the space area, and spherical body parameters corresponding to the random points are determined based on the thickness size and the strength requirement of the space area.
The model of the part to be manufactured may be stored as an STL (stereolithography) file, i.e., an STL file in which the part to be manufactured model includes size information of the part to be manufactured, which is imported on a mathematic platform. The component to be manufactured is a three-dimensional structural component, and a corresponding spatial region is constructed according to the three-dimensional structure of the component to be manufactured, wherein the size of the spatial region may be the same as the size of the component to be manufactured, for example, the size of the component to be manufactured is a × b × c, and accordingly, an a × b × c spatial region is created based on the size of the component to be manufactured. By forming a spatial region that corresponds to the dimensions of the component to be manufactured, the subsequent filling of the spatial region with a spherical body structure is facilitated.
In some embodiments, the spatial region corresponding to the component to be manufactured may be formed based on a size expansion of the component to be manufactured, for example, a size of the component to be manufactured is a × b × c, and the spatial region is formed by expanding the size of the component to be manufactured in a preset manner. Illustratively, the dimensions are each expanded by a multiple to form a spatial region of (k1 × a) × (k2 × b) × (k3 × c), k1, k2 and k3 each being positive numbers greater than 1, or the dimensions are each expanded by a preset amount to form a spatial region of (k4+ a) × (k5+ b) × (k6+ c), where k4, k5 and k6 each being positive numbers greater than 0. By forming a space region which is expanded relative to the part to be manufactured, the filling of the position with a smaller size is facilitated, and the problem that the spherical body cannot be filled due to the smaller size is avoided. Optionally, the size of the component to be manufactured may be judged, and it is determined whether a portion smaller than a preset size is included in the component to be manufactured, if so, the portion is expanded to form a spatial region based on the size of the component to be manufactured, and if not, the spatial region having the same size as the component to be manufactured is constructed.
In the filling process of the spherical body, a large number of random points are arranged in the space region, the random points meeting the conditions are screened, the spherical body is generated by taking the screened random points as the sphere center, and the automatic spherical body filling of the space region is realized.
When a space region is constructed, a three-dimensional coordinate system is set, the three-dimensional coordinate of the space region can be determined, correspondingly, random points are generated in the space region, and the coordinate information of each random point can be further determined. In some embodiments, M random points are randomly generated in the spatial region, and coordinate information of the M random points is recorded, for example, the coordinate information of the random points may be stored in a random point list or a random point set, which is not limited herein. According to the method, the number M of random points can be positively correlated with the size of the space region, and the larger the size of the space region is, the larger the number M of random points is. Optionally, the number N may be determined according to a preset proportional relationship between the size of the space region and the number M of the random points, and the size of the space region, and the number N is expanded by a preset multiple to obtain the number M, for example, the number M is 2N, and the expansion multiple is not limited. The preset proportional relation between the size of the spatial region and the number M of the random points may be determined according to the type of the component to be manufactured, or may be determined according to the endured application of the component to be manufactured, wherein the stronger the endured application, the larger the number M. By expanding the number of the random points determined based on the preset proportional relation, the situation that the random points in a partial space region are larger in distance due to the fact that partial random points are gathered and further an isolated spherical body is caused is avoided.
In some embodiments, generating a preset number of random points in the spatial region comprises: acquiring coordinate information of the generated random point, and generating a next random point meeting a preset random point distance range based on the coordinate information of the generated random point and the preset random point distance range, wherein the preset random point distance range comprises a minimum value and a maximum value of adjacent random points. And limiting the distance between the random points based on the preset random point distance range, so that the distance between any adjacent random points is between the minimum value and the maximum value, and invalid random points and isolated random points are prevented from being generated. And the maximum value and the minimum value of the preset random point distance range are determined based on the radius range of the spherical body to be filled in the space region. For example, the radius range of the spherical body to be filled is 1mm-10mm, when the distance between adjacent random points is greater than twice of the maximum radius value, it is determined that the spherical bodies corresponding to the adjacent random points are isolated from each other, and correspondingly, the maximum value of the preset random point distance range may be twice of the maximum radius value; when the distance between adjacent random points is smaller than the minimum radius value or the difference between the two times of the minimum radius value and the thickness, determining that the spherical bodies corresponding to the adjacent random points intersect or mutually contain each other, so that the weight of the hollow area of the spherical bodies is increased, and the weight reduction of the part to be manufactured is influenced, therefore, the minimum value of the preset random point distance range can be the minimum radius value or the difference between the two times of the minimum radius value and the thickness.
In the process of generating the random points, coordinate information of the generated random points is obtained, a generating area of a next random point is determined based on a preset random point distance range, the next random point is randomly generated in the generating area, and the like until a preset number of random points are generated.
And setting spherical body parameters for each generated random point, wherein the spherical body parameters comprise a spherical radius and a spherical shell thickness, and the spherical radius is the spherical outer radius. In some embodiments, the spherical body parameters of random points in the same spatial region are consistent, which may be determined, for example, by the type of part to be manufactured. In some embodiments, the spherical parameters of random points in the same spatial region are different, and can be set according to the thickness size and strength requirement of the spatial region. The radius of the sphere corresponding to the random point is positively correlated with the thickness of the space region, and the thickness of the spherical shell is positively correlated with the strength requirement. The strength requirement of the spatial region may be an application profile of the component to be manufactured, the greater the stress experienced, i.e. the greater the strength requirement, the smaller the stress experienced, i.e. the smaller the strength requirement. Optionally, stress simulation is performed on the solid structure of the component to be manufactured, and the strength requirement of each position of the component to be manufactured is determined based on the simulation result. Illustratively, referring to fig. 5, fig. 5 is a schematic diagram of a stress distribution of a component to be manufactured according to an embodiment of the present invention. Optionally, the sphere radius corresponding to each random point may be determined according to a proportional relationship between the sphere radius and the thickness dimension of the space region (for example, it may be a proportional curve), and the thickness dimension of each position in the space region, and the spherical shell thickness corresponding to each random point may be determined according to a proportional relationship between the spherical shell thickness and the intensity requirement (for example, it may be a proportional curve), and the intensity requirement of each position in the space region.
In some embodiments, determining the spherical body parameters corresponding to the random points based on the thickness dimension and the strength requirement of the spatial region comprises: dividing the space region based on the thickness size of the space region to obtain at least one divided space; and determining the spherical body parameters of the random points in each divided space based on the thickness size and the strength requirement of each divided space.
In the space division process, the space region may be divided based on a variation tendency of the thickness dimension, wherein when the thickness dimension is continuously varied, the space division may be performed based on the thickness dimension interval. For example, the thickness dimension interval may be 0.3mm, 1mm, etc., and the thickness dimension interval may be determined according to the overall thickness dimension variation of the part to be manufactured, e.g., the thickness dimension interval may be 1/n of the overall thickness dimension variation value, n being a positive integer greater than 1. Illustratively, the thickness dimension of the part to be manufactured has a tendency to vary from 5mm to 3mm, and the thickness dimension spacing may be 0.5mm, i.e. the overall spatial area is divided into four divisions having thickness dimensions of 3mm to 3.5mm, 3.5mm to 4mm, 4mm to 4.5mm, 4.5mm to 5 mm.
On the basis of the above spatial division based on the thickness dimension interval, when the thickness dimension changes discontinuously, that is, when there is a subsequent dimension sudden change, the spatial division is performed at a sudden change position, for example, the overall change trend of the thickness dimension of the part to be manufactured is changed from 5mm to 3mm, wherein the part changing from 5mm to 4.3mm is included, and the part changing from 5mm to 4.3mm is suddenly changed to 3.5mm at the thickness of 4.3mm, and the part continuously changing from 3.5mm to 3mm, the spatial division may be performed at the sudden change position first, and the divided space is further divided based on the thickness dimension interval.
The space area can be divided in a targeted manner by dividing the space area according to the variation trend of the thickness size, so that the spherical body parameters of random points can be accurately set conveniently, and the filling accuracy of the spherical body is improved.
In some embodiments, the parameters of the spherical body at random points in the same partitioned space may be the same, that is, the spherical shell thickness is positively correlated with the strength requirement of the partitioned space, and the spherical body radius is positively correlated with the thickness dimension of the partitioned space. The thickness dimension of the partitioned space may be a mean value of the thickness dimensions of the partitioned space, and the intensity requirement of the partitioned space may be a maximum value or a mean value of the intensity requirements of the partitioned space.
In some embodiments, the parameters of the spherical body at random points in the same partition space can be set according to the thickness size and strength requirement change of the positions of the random points. For example, the spherical shell thickness of the division area or the random point of the maximum intensity requirement position in the part to be manufactured is determined, the variation of the spherical shell thickness of other random points relative to the random point of the maximum intensity requirement position is determined based on the distance between the other random points and the random point of the maximum intensity requirement position, and the spherical shell thickness of other random points is further determined, for example, the variation is positively correlated with the distance. The thickness of the spherical shell at the random point of the maximum value position of the intensity requirement can be determined according to the preset proportional relation between the thickness of the spherical shell and the intensity requirement.
In this embodiment, the corresponding sphere body parameter of each random point is set up in a flexible way based on thickness dimension and intensity demand, improves the precision of the spherical body of packing in the space region for the spherical body of packing adapts to the structural change and the stress change of individual position in the space region, guarantees that the sphere body structure satisfies the quality demand of part.
S220, screening effective random points based on the spherical body parameters, and generating a spherical body corresponding to each effective random point based on the spherical body parameters to form the spherical body in the part to be manufactured.
And the generated random points in the space region comprise invalid random points, the valid random points and the invalid random points are screened through spherical body parameters, the invalid random points are removed, and a spherical body is generated in the space region according to the spherical body parameters of the valid random points.
Optionally, based on the effective random point of sphere parameter screening to the sphere that each effective random point corresponds to is generated based on sphere parameter, include: acquiring the center point coordinates and the spherical body parameters of the generated spherical bodies, eliminating invalid random points in the space region based on the center point coordinates and the spherical body parameters of the generated spherical bodies, and respectively determining the center point set of the next spherical body matched with each generated spherical body in the current valid random points according to the spherical body distance center point judgment rule; and determining a random point serving as the center point of the next spherical body based on each center point set, and forming the next spherical body based on the spherical body parameters corresponding to the random point of the center point of the next spherical body.
And generating a first spherical body in the space region based on the spherical body parameter which is generated by taking any random point in the space region as a central point and corresponding to any random point. Each random point may be represented as Bi (Bix, Biy, Biz, Bir, Bit), where Bix, Biy, and Biz are used to represent coordinate values of the random point Bi in a spatial region, Bir is a sphere radius corresponding to the random point Bi, and Bit is a spherical shell thickness corresponding to the random point Bi. Randomly selecting any random point in a space region, and generating a spherical body Dj based on spherical body parameters of the random point, wherein the radius is Djr, the spherical shell thickness is Djt, the Djr is the same as the sphere radius Bir corresponding to the random point for generating the spherical body, and correspondingly, the Djt is the same as the spherical shell thickness Bit corresponding to the random point for generating the spherical body. The information of the generated spherical body Dj is recorded and stored, for example, it may be stored in a list manner or an aggregation manner, and correspondingly, the random point information corresponding to the spherical body Dj is deleted from the storage list of random points.
In the generation process of the next spherical body, the coordinates of the center point and the spherical body parameters of at least one generated spherical body are determined based on the spherical body information storage list, the invalid random points corresponding to each generated spherical body are determined, the invalid random points are removed from the storage list of the random points, and the interference of the invalid random points in the generation process of the spherical body is avoided by removing the invalid random points. And the invalid random points comprise random points of which the generated spherical body is positioned inside the generated spherical body and intersect with the generated spherical body, and an intersecting cavity exists. Optionally, rejecting invalid random points in the spatial region based on the coordinates of the center point of the generated spherical body and the parameters of the spherical body, includes: for any random point, if the distance between the current random point and the center point of the generated spherical body is less than or equal to a first preset distance, determining that the current random point is an invalid random point, wherein the first preset distance is determined based on the spherical body parameter corresponding to the current random point and the spherical body parameter of the generated spherical body. For any random point, calculating the distance between the random point and the central point of each generated spherical body based on the coordinate information of the random point and the central point coordinate information of each generated spherical body, and judging whether the random point is an invalid random point or not based on the distance between the random point and the central point of each generated spherical body and a corresponding first preset distance, wherein the first preset distance is determined based on the spherical body parameters of the random point and the generated spherical body. The first preset distance is determined based on the spherical body parameter corresponding to the current random point and the spherical body parameter of the generated spherical body, and may be, for example, a distance value smaller than a sum of a spherical radius corresponding to the random point and a radius of each generated spherical body and larger than any distance value in a range of a sum of a spherical inner diameter corresponding to the random point and an inner diameter of each generated spherical body, where the spherical inner diameter corresponding to the random point is a difference value between the spherical radius corresponding to the random point and a spherical shell thickness, and the inner diameter of the generated spherical body is a difference value between the spherical radius of the generated spherical body and the spherical shell thickness. And determining a differential first preset distance according to the spherical body parameters of the random points and the spherical body parameters of the generated spherical body, and pertinently judging invalid random points to improve the judgment accuracy.
In some embodiments, whether the random point Bi (Bix, Biy, Biz, Bir, Bit) is an invalid random point may be determined by the following formula:
(Bix-Djx)2+(Biy-Djy)2+(Biz-Djz)2≤Ki(Djr+Bir)2
therein, spherical body information (Djx, Djy, Djz, Djr, Djt), Ki (Djr + Bir) of the spherical body Dj has been generated2Is a first preset distance, wherein Ki satisfies the following condition: ki is more than or equal to 1 and is more than or equal to (Djr + Bir-Djt-Bit)/(Djr + Bir).
In some embodiments, after each spherical body is generated, the invalid random point corresponding to the current spherical body is determined, and the invalid random point corresponding to the current spherical body is removed from the storage list of the random points, so that the invalid random points are determined for all generated spheres after each spherical body is not needed, the calculation amount is reduced, and the generation efficiency of the spherical body is improved.
And on the basis of rejecting invalid random points, determining random points for generating a next spherical body. The random point that can be used as the next spherical body may be plural, and the random point of the next spherical body is determined among the plural random points. Optionally, the determining, in the current effective random point, a set of center points of the next spherical body matched with each generated spherical body according to the spherical body distance center point discrimination rule includes: and for any effective random point, if the distance between the current effective random point and the central point of the generated spherical body is less than a second preset distance, determining that the current effective random point is the central point of the next spherical body matched with the generated spherical body, wherein the second preset distance is the sum of the radius of the spherical body corresponding to the current effective random point and the radius of the generated spherical body. On the basis of eliminating the invalid random points, determining a current effective random point based on the second preset distance, wherein the current effective random point can support generation of a spherical body which is externally tangent or internally tangent to at least one generated spherical body, so that the supporting relation between the generated spherical body and the generated spherical body is ensured, and the number of isolated spherical bodies is reduced.
In some embodiments, whether any random point Bi (Bix, Biy, Biz, Bir, Bit) is a random point suitable for generating the next spherical body can be determined by the following formula:
(Bix-Djx)2+(Biy-Djy)2+(Biz-Djz)2＜(Djr+Bir)2wherein the spherical body information of the spherical body Dj has been generated (Djx, Djy, Djz, Djr, Djt). And respectively determining random points corresponding to each generated spherical body and suitable for generating the next spherical body to form a central point set of the next spherical body.
Exemplarily, referring to fig. 6, fig. 6 is a two-dimensional schematic diagram of a spherical body generation process provided by the embodiment of the present invention. Referring to the upper left diagram in fig. 6, when the first spherical body is generated, the invalid random point corresponding to the first spherical body is determined, referring to the upper right diagram in fig. 6, the set of central points corresponding to the first spherical body and adapted to the second spherical body, i.e. the random points in the ring-shaped shaded area in the upper right diagram in fig. 6, are determined, the next random point is determined in the central point set, and the second spherical body is generated, referring to the lower left diagram in fig. 6. Determining an invalid random point corresponding to the second spherical body, updating the previous central point set based on the invalid random point, removing the invalid random point corresponding to the second spherical body from the previous central point set, and determining a random point for generating a third spherical body based on the random point corresponding to the second spherical body and the updated previous central point set, see the lower right diagram in fig. 6, and so on.
Wherein, confirm the random point as the central point of next sphere based on each central point set, include: and randomly determining any random point in the center point of the next spherical body matched with each generated spherical body as the random point of the center point of the next spherical body. Or, the random point with the highest frequency of occurrence in the center point of the next spherical body matched with each generated spherical body is taken as the random point of the center point of the next spherical body.
And circulating the generation method of the spherical body until no effective random point which is not traversed exists in the space region, and determining that the spherical body structure in the visible region is completely established. Exemplarily, referring to fig. 2, fig. 2 is a schematic diagram of a spherical body generated in a space region according to an embodiment of the present invention.
On the basis of the above embodiment, the spatial region corresponding to the component to be manufactured is obtained by expanding the size of the component to be manufactured, and specifically, the size of the component to be manufactured may be obtained; and carrying out space expansion on the initial space region corresponding to the size of the component to obtain the space region corresponding to the component to be manufactured. Correspondingly, after generating the spherical body corresponding to each effective random point based on the spherical body parameters, the method further comprises the following steps: and cutting the space area of the generated spherical body based on the size of the part to be manufactured to obtain the spherical body structure corresponding to the initial space area. By expanding the size of the part to be manufactured, the problem that in the process of generating the spherical body, the spherical body with the undersize is generated at the part with the smaller size in the part to be manufactured, and the weight reduction effect is reduced is solved. And after the spherical surface body structure is generated in the space region, cutting based on the part size of the part to be manufactured to form the spherical surface body structure of the part to be manufactured.
On the basis of the above embodiment, after the spherical body structure of the component to be manufactured is generated, the method may further include performing application simulation on the generated spherical body structure of the component to be manufactured to obtain a stress distribution of the spherical body structure of the component to be manufactured, and determining whether the stress distribution meets a stress requirement, if not, adjusting spherical body parameters that do not meet random points in a stress distribution area, and re-executing the above method based on the adjusted spherical body parameters to obtain the spherical body structure meeting the stress requirement.
And S230, determining the spherical body to be supported based on the position of each spherical body in the space region.
S240, determining a target spherical body which provides a supporting growing point for the spherical body to be supported in each spherical body in the space area.
And S250, adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured.
According to the technical scheme of the embodiment, a space area corresponding to the part to be manufactured is created, a preset number of random points and corresponding spherical body parameters are generated in the space area, effective random points are screened from the generated random points, and spherical bodies corresponding to the effective random points are generated based on the spherical body parameters, so that the spherical body in the part to be manufactured is formed. The spherical body parameters of random points are determined in a self-adaptive mode according to the thickness and the strength of the space region, the spherical body structure suitable for the part requirements is convenient to generate, the generation quality of the spherical body structure is improved, the effective random points are screened by eliminating the ineffective random points, and the spherical body generated by the ineffective random points is prevented from influencing the part weight reduction effect. Furthermore, for the spherical body without support, at least one target spherical body for providing support is determined, and support is arranged between the target spherical body and the spherical body to be supported, so that the material increase manufacturing process is met, the problem that the whole component structure is influenced due to the manufacturing failure of any spherical body is avoided, and the production precision of the spherical shell structure is improved.
EXAMPLE III
Fig. 7 is a schematic structural diagram of a spherical shell structure generating device according to a third embodiment of the present invention, where the device includes:
the spherical body filling module 310 is used for acquiring a space region corresponding to a component to be manufactured, and filling a spherical body in the space region based on a spherical body filling rule;
a to-be-supported spherical body determining module 320, configured to determine a to-be-supported spherical body based on the position of each spherical body in the spatial region;
a target spherical body determining module 330, configured to determine, in each spherical body in the spatial region, a target spherical body that provides a supporting growth point for the spherical body to be supported;
and a support adding module 340, configured to add a support between the target spherical body and the spherical body to be supported, so as to form a spherical shell structure of the component to be manufactured.
Optionally, the to-be-supported spherical body determining module 320 is configured to:
for any spherical body, determining whether the distance between the position of the lowest point of the current spherical body and the positions of the central points of other spherical bodies is smaller than or equal to the radius of the other spherical bodies;
if not, determining that the current spherical body is the spherical body to be supported.
Optionally, the target spherical body determining module 330 includes:
the other spherical body determining unit is used for determining at least one other spherical body relative to a preset area of the spherical body to be supported based on the additive manufacturing direction for any spherical body to be supported;
and the target spherical body determining unit is used for judging whether the other spherical bodies are target spherical bodies which provide supporting growing points for the spherical bodies to be supported or not based on the coordinate information of the other spherical bodies and the coordinate information of the spherical bodies to be supported.
Optionally, the target sphere determining unit is configured to:
determining an included angle between a connecting line of the lowest point of the other spherical surface body and the lowest point of the spherical surface body to be supported and the additive manufacturing direction based on the coordinates of the lowest point of the other spherical surface body and the coordinates of the lowest point of the spherical surface body to be supported;
if the included angle meets the safe growth angle of additive manufacturing, and any spherical body does not exist on the connecting line of the lowest point of the other spherical bodies and the lowest point of the spherical body to be supported, determining that the other spherical bodies are target spherical bodies for providing supporting growth points for the spherical body to be supported;
and if the included angle does not meet the safe growth angle of additive manufacturing, or at least one spherical body exists on a connecting line of the lowest point of the other spherical body and the lowest point of the spherical body to be supported, determining that the other spherical body is not a target spherical body for providing a supporting growth point for the spherical body to be supported.
Optionally, the other spherical body determining unit is configured to:
and determining a local area adjacent to the spherical body to be supported in the negative direction of the additive manufacturing direction, wherein the local area comprises at least one other spherical body.
Optionally, the other spherical body determining unit is configured to: performing three-dimensional grid division on the space area based on the additive manufacturing direction, and correspondingly writing spherical bodies in each grid into a three-dimensional array;
and determining a dimension corresponding to the additive manufacturing direction on the basis of the position of the spherical body to be supported in the three-dimensional array, wherein the negative direction of the additive manufacturing direction is a local area adjacent to the spherical body to be supported.
Optionally, the support adding module 340 is configured to:
determining the intersection point of the connecting line of the lowest point of the target spherical body and the lowest point of the spherical body to be supported and the outer surface of the target spherical body as a supporting growing point;
and determining structural parameters of support based on the support growing point and the lowest point of the spherical body to be supported, and setting the support of the target spherical body and the spherical body to be supported according to the support parameters.
Optionally, the supporting between the target spherical body and the spherical body to be supported includes: the support comprises a linear support, an arc support and a curve support, and the cross section of the support comprises a circle, an ellipse and a polygon.
Optionally, the apparatus further comprises:
and the support judging module is used for judging whether the radius of the arc support is greater than the radius of the circular section or the length of a radial half shaft of the elliptical section if the support is the arc support and the section of the support is circular or elliptical after the support is added between the target spherical body and the spherical body to be supported.
Optionally, the spherical body filling module 310 is configured to:
generating a preset number of random points in the space region, and determining spherical body parameters corresponding to the random points based on the thickness size and the strength requirement of the space region;
and screening effective random points based on the spherical body parameters, and generating a spherical body corresponding to each effective random point based on the spherical body parameters so as to form the spherical body in the part to be manufactured.
The product can execute the method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 8 is a schematic structural diagram of a server according to a fourth embodiment of the present invention. FIG. 8 illustrates a block diagram of a server 412 suitable for use in implementing embodiments of the present invention. The server 412 shown in fig. 8 is only an example and should not bring any limitations to the function and scope of use of the embodiments of the present invention. The device 412 is typically a server that undertakes image classification functions.
As shown in FIG. 8, the server 412 is in the form of a general purpose computing device. Components of server 412 may include, but are not limited to: one or more processors 416, a storage device 428, and a bus 418 that couples the various system components including the storage device 428 and the processors 416.
Bus 418 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, an enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.
Server 412 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by server 412 and includes both volatile and nonvolatile media, removable and non-removable media.
Storage 428 may include computer system readable media in the form of volatile Memory, such as Random Access Memory (RAM) 430 and/or cache Memory 432. The server 412 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 434 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 8, and commonly referred to as a "hard drive"). Although not shown in FIG. 8, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a Compact disk-Read Only Memory (CD-ROM), a Digital Video disk (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 418 by one or more data media interfaces. Storage 428 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
Program 436 having a set (at least one) of program modules 426 may be stored, for example, in storage 428, such program modules 426 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination may comprise an implementation of a network environment. Program modules 426 generally perform the functions and/or methodologies of embodiments of the invention as described herein.
The server 412 may also communicate with one or more external devices 414 (e.g., keyboard, pointing device, camera, display 424, etc.), with one or more devices that enable a user to interact with the server 412, and/or with any devices (e.g., network card, modem, etc.) that enable the server 412 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 422. Further, server 412 may communicate with one or more networks (e.g., a Local Area Network (LAN), Wide Area Network (WAN)) and/or a public Network (e.g., the Internet) via Network adapter 420. As shown, network adapter 420 communicates with the other modules of server 412 over bus 418. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the server 412, including but not limited to: microcode, device drivers, Redundant processing units, external disk drive Arrays, disk array (RAID) systems, tape drives, and data backup storage systems, to name a few.
The processor 416 executes various functional applications and data processing by executing programs stored in the storage device 428, for example, implementing the spherical shell structure generation method provided by the above-described embodiment of the present invention.
EXAMPLE five
Fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the spherical shell structure generating method provided in the fifth embodiment of the present invention.
Of course, the computer program stored on the computer-readable storage medium provided by the embodiments of the present invention is not limited to the method operations described above, and may also execute the spherical shell structure generation method provided by any embodiment of the present invention.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable source code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Source code embodied on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer source code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The source code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (13)

1. A spherical shell structure generation method is characterized by comprising the following steps:
acquiring a space region corresponding to a part to be manufactured, and filling a spherical body in the space region based on a spherical body filling rule;
determining spherical bodies to be supported based on the positions of the spherical bodies in the space region;
determining a target spherical body which provides a supporting growth point for the spherical body to be supported in each spherical body in the space region;
and adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured.
2. The method of claim 1, wherein said determining spherical bodies to be supported based on the position of each spherical body in said region of space comprises:
for any spherical body, determining whether the distance between the position of the lowest point of the current spherical body and the positions of the central points of other spherical bodies is smaller than or equal to the radius of the other spherical bodies;
if not, determining that the current spherical body is the spherical body to be supported.
3. The method according to claim 1, wherein said determining a target spherical body in each spherical body in said spatial region that provides a supporting growth point for said spherical body to be supported comprises:
for any spherical body to be supported, determining at least one other spherical body relative to a preset area of the spherical body to be supported based on the additive manufacturing direction;
and judging whether the other spherical bodies are target spherical bodies which provide supporting growing points for the spherical bodies to be supported or not based on the coordinate information of the other spherical bodies and the coordinate information of the spherical bodies to be supported.
4. The method according to claim 3, wherein said determining whether said other spherical surface body is a target spherical surface body providing a supporting growing point for said spherical surface body to be supported based on said coordinate information of said other spherical surface body and said coordinate information of said spherical surface body to be supported comprises:
determining an included angle between a connecting line of the lowest point of the other spherical surface body and the lowest point of the spherical surface body to be supported and the additive manufacturing direction based on the coordinates of the lowest point of the other spherical surface body and the coordinates of the lowest point of the spherical surface body to be supported;
if the included angle meets the safe growth angle of additive manufacturing, and any spherical body does not exist on the connecting line of the lowest point of the other spherical bodies and the lowest point of the spherical body to be supported, determining that the other spherical bodies are target spherical bodies for providing supporting growth points for the spherical body to be supported;
and if the included angle does not meet the safe growth angle of additive manufacturing, or at least one spherical body exists on a connecting line of the lowest point of the other spherical body and the lowest point of the spherical body to be supported, determining that the other spherical body is not a target spherical body for providing a supporting growth point for the spherical body to be supported.
5. The method according to claim 3, wherein said determining at least one other spherical body relative to said predetermined area of spherical bodies to be supported based on an additive manufacturing direction comprises:
and determining a local area adjacent to the spherical body to be supported in the negative direction of the additive manufacturing direction, wherein the local area comprises at least one other spherical body.
6. The method of claim 5, further comprising:
performing three-dimensional grid division on the space area based on the additive manufacturing direction, and correspondingly writing spherical bodies in each grid into a three-dimensional array;
wherein, in the negative direction of the additive manufacturing direction, the determining of the local area adjacent to the spherical body to be supported includes:
and determining a dimension corresponding to the additive manufacturing direction on the basis of the position of the spherical body to be supported in the three-dimensional array, wherein the negative direction of the additive manufacturing direction is a local area adjacent to the spherical body to be supported.
7. The method according to claim 1, wherein said adding support between said target spherical body and said spherical body to be supported comprises:
determining the intersection point of the connecting line of the lowest point of the target spherical body and the lowest point of the spherical body to be supported and the outer surface of the target spherical body as a supporting growing point;
and determining structural parameters of support based on the support growing point and the lowest point of the spherical body to be supported, and setting the support of the target spherical body and the spherical body to be supported according to the support parameters.
8. The method according to claim 1, characterized in that the support between the target spherical body and the spherical body to be supported comprises: the support comprises a linear support, an arc support and a curve support, wherein the cross section of the support comprises a circle, an ellipse and a polygon;
after adding support between the target spherical body and the spherical body to be supported, the method further comprises the following steps:
if the support is an arc support and the cross section of the support is circular or elliptical, whether the radius of the arc support is larger than the radius of the circular cross section or the length of a radial half shaft of the elliptical cross section is judged.
9. The method according to claim 1, after determining a target spherical body in each spherical body in the spatial region, which provides a supporting growth point for the spherical body to be supported, further comprising:
if the target spherical body for supporting the growing point is not available, or the number of the target spherical bodies does not reach the preset number, the spherical body parameters of the spherical bodies to be supported are adjusted, or the spherical bodies to be supported are removed from the space region.
10. The method of claim 1, wherein filling the spatial region with spherical bodies based on the spherical body filling rules comprises:
generating a preset number of random points in the space region, and determining spherical body parameters corresponding to the random points based on the thickness size and the strength requirement of the space region;
and screening effective random points based on the spherical body parameters, and generating a spherical body corresponding to each effective random point based on the spherical body parameters so as to form the spherical body in the part to be manufactured.
11. A spherical shell structure generating device, comprising:
the spherical body filling module is used for acquiring a space region corresponding to a part to be manufactured and filling a spherical body in the space region based on a spherical body filling rule;
the spherical body to be supported determining module is used for determining the spherical body to be supported based on the position of each spherical body in the space region;
the target spherical body determining module is used for determining a target spherical body which provides a supporting growth point for the spherical body to be supported in each spherical body in the space region;
and the support adding module is used for adding support between the target spherical body and the spherical body to be supported to form a spherical shell structure of the part to be manufactured.
12. A computer device, characterized in that the computer device comprises:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the spherical shell structure generation method of any of claims 1-10.
13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the spherical shell structure generation method according to any one of claims 1 to 10.
CN202011179710.7A 2020-10-29 2020-10-29 Spherical shell structure generation method and device, storage medium and electronic equipment Withdrawn CN112329138A (en)

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