CN112699510A - Simulation manufacturing method, device, equipment and storage medium for automobile door glass - Google Patents
Simulation manufacturing method, device, equipment and storage medium for automobile door glass Download PDFInfo
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Abstract
The invention discloses a simulation manufacturing method, a simulation manufacturing device, simulation equipment and a storage medium for automobile door glass. The method comprises the following steps: extracting the rear boundary line of the glass surface in the preliminary modeling glass surface; determining a front boundary line of the glass surface according to a preset modeling requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on a preliminary modeling glass surface; determining a first spiral line and a second spiral line according to the boundary line of the rear part of the glass surface and the boundary line of the front part of the glass surface; making an isoparametric curve according to the preliminarily molded glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface; and replacing the preliminarily molded glass surface according to the spiral surface to obtain the target simulated glass surface. By the mode, an ideal glass running track is manufactured in a simulation mode, the problems of unsmooth running and clamping stagnation of the car door glass are theoretically solved, and the technical problem that the deviation of the spiral surface is large due to the existing torus fitting manufacturing method is solved.
Description
Technical Field
The invention relates to the technical field of automobile door glass, in particular to a simulation manufacturing method, a simulation manufacturing device, simulation manufacturing equipment and a storage medium of the automobile door glass.
Background
The spiral surface of the lifter system is an engineering running track surface on the door glass theory, and is a foundation for arrangement of the lifter, the guide rail and the guide groove, the spiral surface is manufactured by fitting through a molding CAS glass surface, the manufacturing precision of the spiral surface affects the deviation of the glass running track, and the glass running track deviation can cause the faults of clamping stagnation, abnormal sound, failure and the like of the lifting glass of the automobile.
At present, a common method for fitting and manufacturing a molding CAS glass surface is a torus fitting method, the fitting method is simple and quick, the method is suitable for the automobile molding (minibus, MPV and commercial vehicle) style with small curvature of the automobile door glass, the smaller the curvature of the automobile glass molding, the higher the fitting precision, but with the development of people on automobile aesthetic appreciation, the more fashionable and dynamic molding (car, sports car and fashion SUV) of the automobile glass is, the curvature is larger, the automobile door glass molding develops from the torus to the drum profile, if the spiral surface is manufactured by using the existing torus fitting method, the fitting deviation becomes larger along with the increase of the curvature of the glass, the requirement of the engineering surface design on deviation smaller than 0.5mm can not be met generally, even the deviation more than 2mm can be achieved, and the fitting and manufacturing of the drum profile can not.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a simulation manufacturing method, a device, equipment and a storage medium for automobile door glass, and aims to solve the technical problem of large deviation of a spiral surface caused by the existing torus fitting manufacturing method.
In order to achieve the aim, the invention provides a simulation manufacturing method of automobile door glass, which comprises the following steps:
extracting the rear boundary line of the glass surface in the preliminary modeling glass surface;
determining a glass surface front boundary line according to a preset shaping requirement, wherein the glass surface front boundary line and the glass surface rear boundary line are parallel based on the preliminarily shaped glass surface;
determining a first spiral line and a second spiral line according to the glass surface rear boundary line and the glass surface front boundary line;
making an isoparametric curve according to the preliminary modeling glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface;
and replacing the preliminary modeling glass surface according to the spiral surface to obtain a target simulation glass surface.
Optionally, the determining a first spiral line and a second spiral line from the glass face rear boundary line and the glass face front boundary line comprises:
acquiring a first vertex corresponding to the rear boundary line of the glass surface;
determining a reference straight line according to the first vertex;
determining a corresponding normal plane according to the reference straight line, wherein the normal plane passes through the first vertex;
determining a projection line of the rear boundary line of the glass surface in the normal plane, and recording the projection line as a first projection line;
fitting according to the first projection line to form a circle, and determining a central point;
determining the rotation axis of the spiral line according to the central point and the reference straight line;
a first helix and a second helix are determined from the axis of rotation.
Optionally, said determining the axis of rotation of the helix from said centre point and said reference line comprises:
an axis parallel to the reference line is drawn through the center point, and the axis is taken as a rotation axis.
Optionally, the determining a reference straight line according to the first vertex includes:
determining a first plane and a second plane according to the first vertex, wherein the first plane is a parallel plane of a coordinate XY axis passing through the first vertex, and the second plane is a parallel plane of a coordinate ZX axis passing through the first vertex;
drawing a first straight line according to the first plane, wherein the first straight line end point passes through the first vertex and forms a first angle with a horizontal line;
drawing a second straight line according to the second plane, wherein the end point of the second straight line passes through the first vertex and forms a second angle with the horizontal line;
and determining an angle bisection straight line according to the first angle and the second angle, and taking the angle bisection straight line as a reference straight line.
Optionally, after determining a projection line of the rear boundary line of the glass surface in the normal plane, which is denoted as a first projection line, the method further comprises:
determining a projection line of the front boundary line of the glass surface in the normal plane, and recording the projection line as a second projection line;
judging the distance between the first projection line and the second projection line;
and when the distance between the first projection line and the second projection line is larger than a preset deviation threshold, adjusting the first angle and the second angle, executing the step of determining an angle bisection straight line according to the first angle and the second angle after adjustment, and taking the angle bisection straight line as a reference straight line.
Optionally, said determining a first helix and a second helix from said axis of rotation comprises:
acquiring a second vertex corresponding to the front boundary line of the glass surface;
determining a projection point corresponding to the rear boundary line of the glass surface on the rotating axis, and determining a spiral angle and spiral step length according to the projection point;
determining a pitch according to the helix angle and the helix step size;
drawing a first spiral line clockwise according to the thread pitch by taking a first vertex corresponding to the rear boundary line of the glass surface as a starting point and the rotating axis as an axis;
and drawing a second spiral line clockwise according to the screw pitch by taking a second vertex corresponding to the front boundary line of the glass surface as a starting point and the rotating axis as an axis.
Optionally, the determining a projection point of the rear glass surface boundary line on the rotation axis, and determining a helix angle and a helix step according to the projection point, includes:
acquiring a first end point corresponding to the rear boundary line of the glass surface;
projecting a first vertex corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a first projection point;
projecting a first end point corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a second projection point;
connecting the first vertex and the first projection point to obtain a third straight line;
connecting the first end point and the second projection point to obtain a fourth straight line;
acquiring an angle between the third straight line and the fourth straight line, and recording the angle as a spiral angle;
and acquiring the distance between the first projection point and the second projection point, and recording the distance as the spiral step length.
In order to achieve the above object, the present invention also provides an apparatus for simulating a door glass of an automobile, comprising:
the acquisition module is used for extracting a rear boundary line of the glass surface in the preliminary modeling glass surface;
the acquisition module is further used for determining a front boundary line of the glass surface according to a preset modeling requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on the preliminary modeling glass surface;
the spiral line determining module is used for determining a first spiral line and a second spiral line according to the rear boundary line and the front boundary line of the glass surface;
the helicoid determining module is used for making an isoparametric curve according to the preliminary modeling glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a helicoid;
and the modeling module is used for replacing the preliminary modeling glass surface according to the spiral surface to obtain a target simulation glass surface.
In addition, in order to achieve the above object, the present invention further provides a simulation apparatus for automobile door glass, including: the simulation production program of the automobile door glass is configured to realize the steps of the simulation production method of the automobile door glass.
In order to achieve the above object, the present invention further provides a storage medium, which stores a simulation program for manufacturing an automobile door glass, wherein the simulation program for manufacturing an automobile door glass realizes the steps of the simulation method for manufacturing an automobile door glass as described above when executed by a processor.
Extracting the rear boundary line of the glass surface in the preliminary modeling glass surface; determining a front boundary line of the glass surface according to a preset modeling requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on a preliminary modeling glass surface; determining a first spiral line and a second spiral line according to the boundary line of the rear part of the glass surface and the boundary line of the front part of the glass surface; making an isoparametric curve according to the preliminarily molded glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface; and replacing the preliminarily molded glass surface according to the spiral surface to obtain the target simulated glass surface. By the mode, an ideal glass running track is manufactured in a simulation mode, the deviation between the helicoid and the modeling surface is small, the design deviation requirement of the engineering surface is met, the problems of unsmooth running and clamping stagnation of the car door glass are theoretically solved, the problems of door closing shaking and abnormal sound of the car door glass are solved under the condition that manufacturing errors are not considered, and the technical problem that the helicoid is large in deviation caused by the existing torus fitting manufacturing method is solved.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for simulating and manufacturing door glass of an automobile in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a simulation method for manufacturing the door glass of the automobile according to the present invention;
FIG. 3 is a schematic flow chart of a simulation method for manufacturing door glass of an automobile according to a second embodiment of the present invention;
FIG. 4 is a schematic view of a reference line of a simulation method for manufacturing door glass of an automobile according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a spiral line simulation process according to an embodiment of the simulation process for manufacturing the door glass of the vehicle;
FIG. 6 is a block diagram showing a simulation apparatus for manufacturing door glass of an automobile according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a simulation manufacturing apparatus for an automobile door glass in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the simulation fabrication apparatus for an automobile door glass may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of an automotive door glazing simulation apparatus, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include an operating system, a network communication module, a user interface module, and a simulation program for a door glass of an automobile.
In the simulation manufacturing apparatus for automobile door glass shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the simulation creation device of the automobile door glass of the present invention may be provided in the simulation creation device of the automobile door glass, which calls the simulation creation program of the automobile door glass stored in the memory 1005 through the processor 1001 and executes the simulation creation method of the automobile door glass provided by the embodiment of the present invention.
The embodiment of the invention provides a simulation manufacturing method of automobile door glass, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the simulation manufacturing method of the automobile door glass.
In this embodiment, the simulation manufacturing method of the automobile door glass includes the following steps:
step S10: and extracting the rear boundary line of the glass surface in the preliminary modeling glass surface.
It should be understood that the execution subject of the embodiment is the simulation manufacturing device of the automobile door glass, and the simulation manufacturing device of the automobile door glass may be a device such as a computer or a server, and may also be other devices, which is not limited in this embodiment. The primary modeling glass surface is an automobile CAS (concept A surface) surface. In the automobile development process, the CAS surface which is reasonably manufactured is in the early modeling stage and is generally used for optimizing wind resistance and wind noise in the early modeling stage. Because in the use process of an actual vehicle, the problems of unsmooth running and clamping stagnation of the door glass and door glass closing shaking and abnormal sound are easy to occur, the embodiment mainly manufactures an ideal glass running track according to modeling CAS surface simulation, the deviation between the obtained spiral surface and the modeling surface is small, and the design deviation requirement of an engineering surface is met. In order to improve the simulation manufacturing efficiency, the glass surface simulation manufacturing is performed through the CATIA software and the secondary development tool application, the shaped CAS surface is used as input, and finally the spiral line and the spiral surface of the glass surface are output. Other forms may be used, and the present embodiment is not limited thereto.
The glass surface rear boundary line is a glass boundary near a B-pillar, which is a pillar extending from the roof to the floor between the front seat and the rear seat of the cabin. In this embodiment, the description of simulation production is given by taking the front door hyperbolic glass as an example. The process of extracting the rear boundary line of the glass surface in the preliminary molding glass surface is mainly to determine the rear boundary line of the glass surface according to the CAS surface which is designed to be molded in advance. In this example, a method of producing a glass simulation for a front door is described as an example, and a method of producing a glass simulation for a rear door is the same as that for a front door, but since the spiral pitches of the front and rear doors are different (the inclination angles of the B-pillars are different), it is certain that the two spiral surfaces of the front and rear doors are not one surface. The description is omitted here.
Step S20: determining a glass surface front boundary line according to a preset shaping requirement, wherein the glass surface front boundary line and the glass surface rear boundary line are parallel based on the preliminarily shaped glass surface.
It is understood that the parallel distance between the rear boundary line of the glass surface and the front boundary line of the glass surface is primarily determined by the molding CAS, and the matching adjustment is performed later according to the molding requirements.
Step S30: and determining a first spiral line and a second spiral line according to the glass surface rear boundary line and the glass surface front boundary line.
It can be understood that the first spiral line and the second spiral line are lifting lines for glass, and the glass lifting guide rail can be manufactured according to the lifting lines, which is not limited in this embodiment. The car door glass in the embodiment refers to double-curvature glass, and the motion track of the car door double-curvature glass is synthesized from two directions: CASE1 is a uniform translation (v) of the glass; CASE2 is the constant rotation (ω) of the glass; synthetic motion of hyperbolic glass: v + v/v + omega/omega + omega, the glass is a composite geometric characteristic that the glass does constant-speed translation along the axial direction while rotating around a straight line as a fixed axis, namely a spiral surface, and the motion track of one point on the boundary of the glass is a spiral line.
The process of determining the first spiral line and the second spiral line includes determining a reference straight line and a normal plane of the reference straight line, determining a projection line of the rear boundary line of the glass surface in the normal plane, determining a rotation axis according to the projection line and the reference straight line, projecting the rear boundary line of the glass surface on the rotation axis, determining a spiral angle and a spiral step length to determine a screw pitch, and obtaining the first spiral line and the second spiral line according to the rotation axis and the screw pitch.
Step S40: and drawing an isoparametric curve according to the preliminarily molded glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface.
It can be understood that the isoparametric curve can be determined by acquiring a projection line of a horizontal line on the modeling CAS surface, or can be acquired in other manners, and when CATIA software is used, the right click on the modeling CAS surface can be directly selected to be taken or extracted, a point is specified on the modeling CAS surface, and the curve direction element is given, so that the isoparametric curve determination process can be completed according to determination.
Step S50: and replacing the preliminary modeling glass surface according to the spiral surface to obtain a target simulation glass surface.
It can be understood that the generated helicoid can be directly used for replacing the original modeling glass surface because the deviation is small, and the target simulation glass surface is obtained.
The embodiment extracts the rear boundary line of the glass surface in the preliminary modeling glass surface; determining a front boundary line of the glass surface according to a preset modeling requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on a preliminary modeling glass surface; determining a first spiral line and a second spiral line according to the boundary line of the rear part of the glass surface and the boundary line of the front part of the glass surface; making an isoparametric curve according to the preliminarily molded glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface; and replacing the preliminarily molded glass surface according to the spiral surface to obtain the target simulated glass surface. By the mode, an ideal glass running track is manufactured in a simulation mode, the deviation between the helicoid and the modeling surface is small, the design deviation requirement of the engineering surface is met, the problems of unsmooth running and clamping stagnation of the car door glass are theoretically solved, the problems of door closing shaking and abnormal sound of the car door glass are solved under the condition that manufacturing errors are not considered, and the technical problem that the helicoid is large in deviation caused by the existing torus fitting manufacturing method is solved.
Referring to fig. 3, fig. 3 is a schematic flow chart of a simulation method for manufacturing a door glass of an automobile according to a second embodiment of the present invention.
Based on the first embodiment, the simulation manufacturing method for the automobile door glass of the embodiment includes, in step S30:
step S301: and acquiring a first vertex corresponding to the rear boundary line of the glass surface.
It will be appreciated that the first vertex is the vertex of the back boundary line of the glass face when the molding CAS face is in front.
Step S302: and determining a reference straight line according to the first vertex.
It will be appreciated that the reference line passing through the first vertex at an angle to the horizontal may be adjusted according to the deviation test between the resulting glass surface and the molding CAS until a suitable reference line is obtained. The determination may also be made in other ways.
Further, in order to obtain a proper reference straight line and make the error between the finally obtained spiral surface and the modeling surface meet the requirement, step S302 includes: determining a first plane and a second plane according to the first vertex, wherein the first plane is a parallel plane of a coordinate XY axis passing through the first vertex, and the second plane is a parallel plane of a coordinate ZX axis passing through the first vertex; drawing a first straight line according to the first plane, wherein the first straight line end point passes through the first vertex and forms a first angle with a horizontal line; drawing a second straight line according to the second plane, wherein the end point of the second straight line passes through the first vertex and forms a second angle with the horizontal line; and determining an angle bisection straight line according to the first angle and the second angle, and taking the angle bisection straight line as a reference straight line.
Referring to fig. 4, fig. 4 is a schematic reference line diagram of an embodiment of a simulation method for manufacturing the automobile door glass of the invention.
It can be understood that the position of the reference straight line can be adjusted by changing the sizes of the first angle and the second angle, and the error between the finally obtained spiral surface and the modeling surface can be achieved by adjusting the position of the reference straight line.
Step S303: and determining a corresponding normal plane according to the reference straight line, wherein the normal plane passes through the first vertex.
It is understood that the normal plane refers to a plane perpendicular to the reference line.
Step S304: and determining a projection line of the rear boundary line of the glass surface in the normal plane, and recording the projection line as a first projection line.
It will be appreciated that the projection line of the rear boundary line of the glass surface in said normal plane is a curved line.
Correspondingly, after step S304, the method further includes: determining a projection line of the front boundary line of the glass surface in the normal plane, and recording the projection line as a second projection line; judging the distance between the first projection line and the second projection line; and when the distance between the first projection line and the second projection line is larger than a preset deviation threshold, adjusting the first angle and the second angle, executing the step of determining an angle bisection straight line according to the first angle and the second angle after adjustment, and taking the angle bisection straight line as a reference straight line.
It can be understood that, in order to reduce the deviation between the spiral surface and the modeling CAS surface, the distance between the first projection line and the second projection line can be controlled to be less than or equal to 0.1mm, so that the finally obtained spiral surface better meets the engineering requirements, and the distance between the first projection line and the second projection line can be controlled by adjusting the first angle and the second angle. In a specific implementation, when CATIA software is used, a free form surface design Analysis tool is entered, and the first angle and the second angle are adjusted to obtain a reference straight line and a first projection line which finally meet requirements.
Step S305: and fitting to form a circle according to the first projection line, and determining a central point.
It will be appreciated that fitting a circle according to the first projected line to form a circle is to make a circle that is circular through the first projected line according to the first projected line, and the first projected line is an arc of a circle. In a specific implementation, the first projection line may not form a circular arc, and in this case, a circle may be made by selecting any three points on the first projection line, and the first projection line and the circle have at least three intersection points.
Step S306: and determining the rotation axis of the spiral line according to the central point and the reference straight line.
It is understood that the rotation axis parallel to the reference line may be formed between the center point and the reference line, but in order to obtain a spiral surface with less deviation, the embodiment forms an axis parallel to the reference line at the center point position as the rotation axis to control the spiral conforming molding CAS surface of the rear boundary line of the glass surface in the normal plane direction.
Specifically, step S306 includes: an axis parallel to the reference line is drawn through the center point, and the axis is taken as a rotation axis.
Step S307: a first helix and a second helix are determined from the axis of rotation.
Referring to fig. 5, fig. 5 is a schematic view illustrating simulation of a spiral line according to an embodiment of the simulation method for manufacturing the door glass of the automobile.
It is understood that, in fig. 5, two points on the rotation axis are respectively the projection points of the vertex and the endpoint of the rear boundary line of the glass surface on the rotation axis, the spiral angle and the spiral step length are determined to determine the screw pitch, and the first spiral line and the second spiral line can be obtained according to the rotation axis and the screw pitch.
Specifically, step S307 includes: acquiring a second vertex corresponding to the front boundary line of the glass surface; determining a projection point corresponding to the rear boundary line of the glass surface on the rotating axis, and determining a spiral angle and spiral step length according to the projection point; determining a pitch according to the helix angle and the helix step size; drawing a first spiral line clockwise according to the thread pitch by taking a first vertex corresponding to the rear boundary line of the glass surface as a starting point and the rotating axis as an axis; and drawing a second spiral line clockwise according to the screw pitch by taking a second vertex corresponding to the front boundary line of the glass surface as a starting point and the rotating axis as an axis.
Further, the step of determining a projection point of the rear glass surface boundary line on the rotation axis, and determining a helix angle and a helix step length according to the projection point may include: acquiring a first end point corresponding to the rear boundary line of the glass surface; projecting a first vertex corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a first projection point; projecting a first end point corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a second projection point; connecting the first vertex and the first projection point to obtain a third straight line; connecting the first end point and the second projection point to obtain a fourth straight line; acquiring an angle between the third straight line and the fourth straight line, and recording the angle as a spiral angle;
and acquiring the distance between the first projection point and the second projection point, and recording the distance as the spiral step length.
It will be appreciated that the pitch is determined by equation (1):
pitch is H360/α formula (1)
Wherein Pitch is the Pitch, H is the Pitch step, and α is the Pitch angle.
It should be understood that when drawing the first spiral line and the second spiral line, the height and the starting angle may be adjusted according to the size of the large glass surface, for example, the height is 300mm, the starting angle is-57 °, and the embodiment is not limited thereto.
In specific implementation, the helicoid obtained by the embodiment is analyzed according to a DMU analysis module of CATIA software, the deviation between the helicoid and the modeling CAS surface in the full stroke is controlled within a very small range, such as 0-0.1 mm, the original modeling glass surface is directly replaced by the generated helicoid, and the deviation of DUM analysis is 0 at the moment.
In the embodiment, the rotation axis is determined according to the projection line of the rear boundary line of the glass surface in the normal plane by determining the reference straight line, wherein the reference straight line is determined by adjusting the angle, so that the distance between the projection line of the front boundary line of the glass surface and the projection line of the rear boundary line of the glass surface in the normal plane is smaller than a preset deviation threshold, and a reasonable spiral angle and a spiral step length are determined, so that a first spiral line and a second spiral line are obtained, and the deviation between the spiral surface and the modeling CAS surface is reduced, thereby solving the technical problem of large deviation of the spiral surface caused by the existing torus fitting manufacturing method.
In one embodiment, the following steps may be used to explain the simulation method for manufacturing the door glass of the automobile:
the method comprises the following steps: extracting a rear boundary line of the glass surface in the preliminary molding glass surface, and determining a front boundary line of the glass surface according to a preset molding requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on the preliminary molding glass surface;
step two: determining a first plane with an XY axis passing through the first vertex and a second plane with a ZX axis passing through the first vertex according to the first vertex of the rear boundary line of the glass surface, drawing a first straight line which passes through the first vertex and forms a first angle with a horizontal line on the first plane, drawing a second straight line which passes through the first vertex and forms a second angle with the horizontal line on the second plane, and determining an angle bisection straight line according to the first angle and the second angle;
step three: determining a normal plane passing through a first vertex according to the angle bisection straight line, determining a projection line of a rear boundary line of the glass surface in the normal plane, marking as a first projection line, determining a projection line of a front boundary line of the glass surface in the normal plane, marking as a second projection line, adjusting a first angle and a second angle when the distance between the first projection line and the second projection line is greater than a preset deviation threshold, and re-determining the angle bisection straight line according to the adjusted first angle and second angle to obtain a target first projection line;
step four: fitting according to a first projection line of the target to form a circle, determining a central point, drawing an axis parallel to the angle bisection straight line through the central point, and recording the axis as a rotation axis;
step five: projecting the first vertex onto the rotating axis to obtain a first projection point, and projecting a first endpoint corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a second projection point; connecting the first vertex and the first projection point to obtain a third straight line; connecting the first end point and the second projection point to obtain a fourth straight line; acquiring an angle between a third straight line and a fourth straight line, recording the angle as a spiral angle, acquiring a distance between a first projection point and a second projection point, and recording the distance as a spiral step length;
step six: and determining the thread pitch according to the thread pitch and the thread step length, drawing the first thread pitch clockwise according to the thread pitch by taking the first vertex as a starting point and the rotation axis as an axis, and drawing the second thread pitch clockwise according to the thread pitch by taking the second vertex corresponding to the front boundary line of the glass surface as a starting point and the rotation axis as an axis.
In addition, an embodiment of the present invention further provides a storage medium, where the storage medium stores a simulation production program of an automobile door glass, and the simulation production program of the automobile door glass realizes the steps of the simulation production method of the automobile door glass as described above when being executed by a processor.
Referring to fig. 6, fig. 6 is a block diagram showing a first embodiment of the simulation apparatus for automobile door glass according to the present invention.
As shown in fig. 6, the simulation device for automobile door glass according to the embodiment of the present invention includes:
and the acquisition module 10 is used for extracting the rear boundary line of the glass surface in the preliminary modeling glass surface.
It is understood that the as-molded glass face is an automotive cas (concept a surface) face. In the automobile development process, the CAS surface which is reasonably manufactured is in the early modeling stage and is generally used for optimizing wind resistance and wind noise in the early modeling stage. Because in the use process of an actual vehicle, the problems of unsmooth running and clamping stagnation of the door glass and door glass closing shaking and abnormal sound are easy to occur, the embodiment mainly manufactures an ideal glass running track according to modeling CAS surface simulation, the deviation between the obtained spiral surface and the modeling surface is small, and the design deviation requirement of an engineering surface is met. In order to improve the simulation manufacturing efficiency, the glass surface simulation manufacturing is performed through the CATIA software and the secondary development tool application, the shaped CAS surface is used as an input, and the spiral line and the spiral surface of the glass surface are finally output.
The glass surface rear boundary line is a glass boundary near a B-pillar, which is a pillar extending from the roof to the floor between the front seat and the rear seat of the cabin. In this embodiment, the description of simulation production is given by taking the front door hyperbolic glass as an example. The process of extracting the rear boundary line of the glass surface in the preliminary molding glass surface is mainly to determine the rear boundary line of the glass surface according to the CAS surface which is designed to be molded in advance. In this example, a method of producing a glass simulation for a front door is described as an example, and a method of producing a glass simulation for a rear door is the same as that for a front door, but since the spiral pitches of the front and rear doors are different (the inclination angles of the B-pillars are different), it is certain that the two spiral surfaces of the front and rear doors are not one surface. The description is omitted here.
The obtaining module 10 is further configured to determine a front glass surface boundary line according to a preset shaping requirement, wherein the front glass surface boundary line and the rear glass surface boundary line are parallel to each other based on the preliminarily shaped glass surface.
It is understood that the parallel distance between the rear boundary line of the glass surface and the front boundary line of the glass surface is primarily determined by the molding CAS, and the matching adjustment is performed later according to the molding requirements.
A spiral determining module 20 for determining a first spiral and a second spiral based on the glass face rear boundary line and the glass face front boundary line.
It can be understood that the first spiral line and the second spiral line are lifting lines for glass, and the glass lifting guide rail can be manufactured according to the lifting lines, which is not limited in this embodiment. The car door glass in the embodiment refers to double-curvature glass, and the motion track of the car door double-curvature glass is synthesized from two directions: CASE1 is a uniform translation (v) of the glass; CASE2 is the constant rotation (ω) of the glass; synthetic motion of hyperbolic glass: v + v/v + omega/omega + omega, the glass is a composite geometric characteristic that the glass does constant-speed translation along the axial direction while rotating around a straight line as a fixed axis, namely a spiral surface, and the motion track of one point on the boundary of the glass is a spiral line.
The process of determining the first spiral line and the second spiral line includes determining a reference straight line and a normal plane of the reference straight line, determining a projection line of the rear boundary line of the glass surface in the normal plane, determining a rotation axis according to the projection line and the reference straight line, projecting the rear boundary line of the glass surface on the rotation axis, determining a spiral angle and a spiral step length to determine a screw pitch, and obtaining the first spiral line and the second spiral line according to the rotation axis and the screw pitch.
And the helicoid determining module 30 is configured to make an isoparametric curve according to the preliminary modeling glass surface, take the isoparametric curve as a contour, and take the first and second spiral lines as guide lines to sweep, so as to obtain a helicoid.
It can be understood that the isoparametric curve can be determined by acquiring a projection line of a horizontal line on the modeling CAS surface, or can be acquired in other manners, and when CATIA software is used, the right click on the modeling CAS surface can be directly selected to be taken or extracted, a point is specified on the modeling CAS surface, and the curve direction element is given, so that the isoparametric curve determination process can be completed according to determination.
And the modeling module 40 is used for replacing the preliminary modeling glass surface according to the spiral surface to obtain a target simulation glass surface.
It can be understood that the generated helicoid can be directly used for replacing the original modeling glass surface because the deviation is small, and the target simulation glass surface is obtained.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
The embodiment extracts the rear boundary line of the glass surface in the preliminary modeling glass surface; determining a front boundary line of the glass surface according to a preset modeling requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on a preliminary modeling glass surface; determining a first spiral line and a second spiral line according to the boundary line of the rear part of the glass surface and the boundary line of the front part of the glass surface; making an isoparametric curve according to the preliminarily molded glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface; and replacing the preliminarily molded glass surface according to the spiral surface to obtain the target simulated glass surface. By the mode, an ideal glass running track is manufactured in a simulation mode, the deviation between the helicoid and the modeling surface is small, the design deviation requirement of the engineering surface is met, the problems of unsmooth running and clamping stagnation of the car door glass are theoretically solved, the problems of door closing shaking and abnormal sound of the car door glass are solved under the condition that manufacturing errors are not considered, and the technical problem that the helicoid is large in deviation caused by the existing torus fitting manufacturing method is solved.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment can be referred to the simulation manufacturing method of the vehicle door glass provided by any embodiment of the present invention, and are not described herein again.
In an embodiment, the spiral line determining module 20 is further configured to obtain a first vertex corresponding to the rear boundary line of the glass surface;
determining a reference straight line according to the first vertex;
determining a corresponding normal plane according to the reference straight line, wherein the normal plane passes through the first vertex;
determining a projection line of the rear boundary line of the glass surface in the normal plane, and recording the projection line as a first projection line;
fitting according to the first projection line to form a circle, and determining a central point;
determining the rotation axis of the spiral line according to the central point and the reference straight line;
a first helix and a second helix are determined from the axis of rotation.
In an embodiment, the spiral line determining module 20 is further configured to plot an axis parallel to the reference line through the center point, and the axis is recorded as the rotation axis.
In an embodiment, the spiral line determining module 20 is further configured to determine a first plane and a second plane according to the first vertex, where the first plane is a parallel plane where an XY axis of a coordinate passes through the first vertex, and the second plane is a parallel plane where a ZX axis of the coordinate passes through the first vertex;
drawing a first straight line according to the first plane, wherein the first straight line end point passes through the first vertex and forms a first angle with a horizontal line;
drawing a second straight line according to the second plane, wherein the end point of the second straight line passes through the first vertex and forms a second angle with the horizontal line;
and determining an angle bisection straight line according to the first angle and the second angle, and taking the angle bisection straight line as a reference straight line.
In an embodiment, the spiral line determining module 20 is further configured to determine a projection line of the front boundary line of the glass surface in the normal plane, which is denoted as a second projection line;
judging the distance between the first projection line and the second projection line;
and when the distance between the first projection line and the second projection line is larger than a preset deviation threshold, adjusting the first angle and the second angle, executing the step of determining an angle bisection straight line according to the first angle and the second angle after adjustment, and taking the angle bisection straight line as a reference straight line.
In an embodiment, the spiral line determining module 20 is further configured to obtain a second vertex corresponding to the front boundary line of the glass surface;
determining a projection point corresponding to the rear boundary line of the glass surface on the rotating axis, and determining a spiral angle and spiral step length according to the projection point;
determining a pitch according to the helix angle and the helix step size;
drawing a first spiral line clockwise according to the thread pitch by taking a first vertex corresponding to the rear boundary line of the glass surface as a starting point and the rotating axis as an axis;
and drawing a second spiral line clockwise according to the screw pitch by taking a second vertex corresponding to the front boundary line of the glass surface as a starting point and the rotating axis as an axis.
In an embodiment, the spiral line determining module 20 is further configured to obtain a first end point corresponding to the rear boundary line of the glass surface;
projecting a first vertex corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a first projection point;
projecting a first end point corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a second projection point;
connecting the first vertex and the first projection point to obtain a third straight line;
connecting the first end point and the second projection point to obtain a fourth straight line;
acquiring an angle between the third straight line and the fourth straight line, and recording the angle as a spiral angle;
and acquiring the distance between the first projection point and the second projection point, and recording the distance as the spiral step length.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The simulation manufacturing method of the automobile door glass is characterized by comprising the following steps:
extracting the rear boundary line of the glass surface in the preliminary modeling glass surface;
determining a glass surface front boundary line according to a preset shaping requirement, wherein the glass surface front boundary line and the glass surface rear boundary line are parallel based on the preliminarily shaped glass surface;
determining a first spiral line and a second spiral line according to the glass surface rear boundary line and the glass surface front boundary line;
making an isoparametric curve according to the preliminary modeling glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a spiral surface;
and replacing the preliminary modeling glass surface according to the spiral surface to obtain a target simulation glass surface.
2. The method for simulating the manufacture of an automobile door glass as claimed in claim 1, wherein the determining a first spiral line and a second spiral line based on the glass surface rear boundary line and the glass surface front boundary line comprises:
acquiring a first vertex corresponding to the rear boundary line of the glass surface;
determining a reference straight line according to the first vertex;
determining a corresponding normal plane according to the reference straight line, wherein the normal plane passes through the first vertex;
determining a projection line of the rear boundary line of the glass surface in the normal plane, and recording the projection line as a first projection line;
fitting according to the first projection line to form a circle, and determining a central point;
determining the rotation axis of the spiral line according to the central point and the reference straight line;
a first helix and a second helix are determined from the axis of rotation.
3. The method for simulating the manufacture of a door glass for an automobile according to claim 2, wherein said determining the rotation axis of the spiral line based on the center point and the reference line comprises:
an axis parallel to the reference line is drawn through the center point, and the axis is taken as a rotation axis.
4. The method for simulating the manufacture of an automobile door glass as claimed in claim 3, wherein the determining a reference straight line according to the first vertex includes:
determining a first plane and a second plane according to the first vertex, wherein the first plane is a parallel plane of a coordinate XY axis passing through the first vertex, and the second plane is a parallel plane of a coordinate ZX axis passing through the first vertex;
drawing a first straight line according to the first plane, wherein the first straight line end point passes through the first vertex and forms a first angle with a horizontal line;
drawing a second straight line according to the second plane, wherein the end point of the second straight line passes through the first vertex and forms a second angle with the horizontal line;
and determining an angle bisection straight line according to the first angle and the second angle, and taking the angle bisection straight line as a reference straight line.
5. The method for simulating a door glass of an automobile as set forth in claim 4, wherein after the projection line of the rear boundary line of the glass surface in the normal plane is determined and recorded as a first projection line, the method further comprises:
determining a projection line of the front boundary line of the glass surface in the normal plane, and recording the projection line as a second projection line;
judging the distance between the first projection line and the second projection line;
and when the distance between the first projection line and the second projection line is larger than a preset deviation threshold, adjusting the first angle and the second angle, executing the step of determining an angle bisection straight line according to the first angle and the second angle after adjustment, and taking the angle bisection straight line as a reference straight line.
6. The method for simulating the manufacture of a door glass for an automobile according to claim 2, wherein the determining a first spiral line and a second spiral line based on the rotation axis comprises:
acquiring a second vertex corresponding to the front boundary line of the glass surface;
determining a projection point corresponding to the rear boundary line of the glass surface on the rotating axis, and determining a spiral angle and spiral step length according to the projection point;
determining a pitch according to the helix angle and the helix step size;
drawing a first spiral line clockwise according to the thread pitch by taking a first vertex corresponding to the rear boundary line of the glass surface as a starting point and the rotating axis as an axis;
and drawing a second spiral line clockwise according to the screw pitch by taking a second vertex corresponding to the front boundary line of the glass surface as a starting point and the rotating axis as an axis.
7. The method for simulating the manufacture of the door glass of the automobile as claimed in claim 6, wherein the determining the corresponding projection point of the rear boundary line of the glass surface on the rotation axis and determining the spiral angle and the spiral step length according to the projection point comprises:
acquiring a first end point corresponding to the rear boundary line of the glass surface;
projecting a first vertex corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a first projection point;
projecting a first end point corresponding to the rear boundary line of the glass surface onto the rotating axis to obtain a second projection point;
connecting the first vertex and the first projection point to obtain a third straight line;
connecting the first end point and the second projection point to obtain a fourth straight line;
acquiring an angle between the third straight line and the fourth straight line, and recording the angle as a spiral angle;
and acquiring the distance between the first projection point and the second projection point, and recording the distance as the spiral step length.
8. The simulation manufacturing device for the automobile door glass is characterized by comprising the following components:
the acquisition module is used for extracting a rear boundary line of the glass surface in the preliminary modeling glass surface;
the acquisition module is further used for determining a front boundary line of the glass surface according to a preset modeling requirement, wherein the front boundary line of the glass surface is parallel to the rear boundary line of the glass surface based on the preliminary modeling glass surface;
the spiral line determining module is used for determining a first spiral line and a second spiral line according to the rear boundary line and the front boundary line of the glass surface;
the helicoid determining module is used for making an isoparametric curve according to the preliminary modeling glass surface, taking the isoparametric curve as a contour, and taking the first spiral line and the second spiral line as guide lines to sweep to obtain a helicoid;
and the modeling module is used for replacing the preliminary modeling glass surface according to the spiral surface to obtain a target simulation glass surface.
9. An apparatus for simulating the manufacture of a door glass of an automobile, the apparatus comprising: a memory, a processor and a simulation program of an automobile door glass stored on the memory and operable on the processor, the simulation program of an automobile door glass being configured to implement the steps of the simulation method of an automobile door glass according to any one of claims 1 to 7.
10. A storage medium having stored thereon a simulation program for an automobile door glass, the simulation program for an automobile door glass realizing the steps of the simulation method for an automobile door glass according to any one of claims 1 to 7 when executed by a processor.
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