Middle convex curve determination method and device, medium and equipment
By determining the type of the mid-convex curve of the mid-convex roller in the diaphragm production and performing finite element simulation, the diaphragm problem caused by roller deformation is solved, and the quality of diaphragm production is improved.
Patent Information
- Application Number
- CN202411079711.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-01-07
AI Technical Summary
In diaphragm production, the deformation of the roller leads to an increase in shrinkage of the diaphragm surface, width and tension unstable, which leads to deformation, wrinkles and scratches of the diaphragm. There is a lack of an effective method for determining the mid-convex curve to improve this problem.
By determining the type of mid-convex curve to be simulated on the mid-convex roller, a three-dimensional model is established, and a finite element simulation is performed on the simulation platform. The final mid-convex curve, including arcs, parabolas, flexures and Fit the function curve to reduce the vertical deformation of the roller.
It effectively reduces the vertical deformation of the roller, improves the quality of diaphragm production, provides a reference for the design of the middle convex curve of the middle convex roller, and has better application prospects.
Smart Images
Figure CN119272424A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of diaphragm production, and in particular to a method, device, medium and equipment for determining a convex curve. Background Art
[0002] In the production of diaphragms, rollers are key components of the production line, with functions such as transmission, drying, heating, and cooling. Under the action of their own weight and additional loads, rollers will produce certain flexural deformation. If the roller surface deforms too much in the vertical direction, it will cause the diaphragm surface to shrink and become unstable in width and tension, which will lead to deformation, wrinkles, and scratches on the diaphragm. The protruding part of the middle section of the convex roller can compensate for the deformation in the vertical direction to improve the contact performance between the diaphragm and the roller surface, thereby improving the production quality of diaphragms.
[0003] Therefore, there is an urgent need for a method to determine convex curves. Summary of the invention
[0004] In view of the above problems, the present invention is proposed to provide a method, device, medium and equipment for determining a convex curve that overcomes the above problems or at least partially solves the above problems.
[0005] Other features and advantages of the present invention will become apparent from the following detailed description, or may be learned in part by practice of the present invention.
[0006] According to a first aspect of an embodiment of the present invention, a method for determining a convex curve is provided, the method comprising:
[0007] Determine the type of the convex curve to be simulated on the convex roller, and establish corresponding three-dimensional models of the convex roller in the modeling platform according to the type of the convex curve;
[0008] Importing the three-dimensional model of the convex roller corresponding to each type of the convex curve into the simulation platform, setting the simulation parameters in sequence, performing finite element simulation, and obtaining a first simulation result;
[0009] Target parameters are acquired, and a final convex curve of the convex roller is determined according to the target parameters and the first simulation result.
[0010] In some embodiments of the present invention, determining the type of the convex curve to be simulated on the convex roller includes:
[0011] A plane coordinate system is established in the vertical plane where the convex roller passes through the top generatrix, the end point on the driving side of the top generatrix is taken as the origin O, any point on the top generatrix is set as P, the distance and displacement vertically upward and horizontally to the right are positive, and the distance and displacement vertically downward and horizontally to the left are negative;
[0012] An arc is made with the end point of the driving side, and the arc is used as a convex curve;
[0013] A parabola is drawn with the endpoint of the driving side, and the parabola is a convex curve;
[0014] A deflection curve is formed by taking the end point of the driving side as a convex curve;
[0015] The end point of the driving side is used as a fitting function curve, and the fitting function curve is used as a convex curve.
[0016] In some embodiments of the present invention, the arc is made with the endpoint on the driving side, and the arc is used as the convex curve, which includes: on the top generatrix of the roller surface of the convex roller, an arc is determined by the endpoint on the operating side, the endpoint on the driving side, and the convex value of the midpoint, and the arc is used as the convex curve.
[0017] In some embodiments of the present invention, the parabola is formed by taking the endpoint of the driving side as a parabola and taking the parabola as a convex curve comprises:
[0018] The parabola is defined as:
[0019]
[0020] Wherein, x is the horizontal distance between point P and point O, mm; y is the vertical distance between point P and point O, mm; t is the convex value, mm; l is the roller length of the convex roller, mm;
[0021] The parabola is taken as a convex curve.
[0022] In some embodiments of the present invention, the deflection curve is formed by taking the end point of the driving side as the convex curve, and the deflection curve is formed as the convex curve, which comprises:
[0023] The deflection curve is defined as:
[0024]
[0025] Where: x is the horizontal distance between point P and point O, mm; y is the vertical distance between point P and point O, mm; E is the elastic modulus of the material of the convex roller, MPa; d is the inner diameter of the ring of the convex roller, mm; D is the outer diameter of the ring of the convex roller, mm; l is the roller length of the convex roller, mm; ρ is the density of the convex roller, kg / mm 3 ; g is the acceleration due to gravity, 9.8m / s 2 ;
[0026] The deflection curve is a convex curve.
[0027] In some embodiments of the present invention, taking the endpoint of the driving side as a fitting function curve and taking the fitting function curve as a convex curve comprises:
[0028] Obtaining a reference deformation curve of the top generatrix of the roller in the vertical direction, wherein the convex roller is formed by adding a convex curve to the roller;
[0029] According to the reference deformation curve, n fittings are respectively performed to obtain n fitting function curves, and one of the n fitting function curves is used as the convex curve of the convex roller, where n is a positive integer not less than 2.
[0030] In some embodiments of the present invention, obtaining a reference deformation curve of a top generatrix of the roller in a vertical direction comprises:
[0031] Creating a three-dimensional model of the roller for the roller;
[0032] The three-dimensional model of the roller is imported into the simulation platform, and after adding simulation parameters, a second simulation result is obtained, and the second simulation result includes a reference deformation curve of the top generatrix of the roller in the vertical direction.
[0033] According to a second aspect of an embodiment of the present invention, a convex curve determining device is provided, the convex curve determining device comprising:
[0034] A curve analysis module, used to determine the type of the convex curve to be simulated on the convex roller, and to establish a three-dimensional model of the convex roller in the modeling platform according to the type of the convex curve;
[0035] A simulation module, used for importing the three-dimensional model of the convex roller corresponding to each type of the convex curve into the simulation platform, setting simulation parameters in sequence, performing finite element simulation, and obtaining a first simulation result;
[0036] An evaluation module is used to obtain target parameters and determine a final convex curve of the convex roller according to the target parameters and the first simulation result.
[0037] According to a third aspect of an embodiment of the present invention, a computer-readable storage medium is provided, in which computer program instructions are stored. The computer program instructions are loaded and executed by a processor to implement the operations performed by any of the methods described above.
[0038] According to a fourth aspect of an embodiment of the present invention, there is provided an electronic device, comprising a processor and a memory, wherein the memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, it implements instructions of any of the methods described above.
[0039] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:
[0040] An embodiment of the present invention provides a convex curve determination method, device, medium and equipment. The convex curve determination method described in the embodiment of the present invention predefines multiple types of convex curves and performs finite element simulations respectively, and determines the final convex curve of the convex roller based on target parameters and simulation results. This can reduce the vertical deformation of the roller, thereby improving the production quality of the diaphragm, providing a reference for the convex curve design of the convex roller, and has good application prospects.
[0041] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0043] Figure 1 A schematic diagram of a flow chart of a method for determining a convex curve provided by an embodiment of the present invention;
[0044] Figure 2 Schematic diagram of the load and constraint of the roller;
[0045] Figure 3 a is a schematic diagram of equivalent stress reference;
[0046] Figure 3 b is a reference schematic diagram of the total surface deformation;
[0047] Figure 3 c is a reference diagram of surface deformation in the vertical direction;
[0048] Figure 3 d is a reference schematic diagram of the benchmark deformation curve;
[0049] Figure 4 is a reference schematic diagram of a convex roller;
[0050] Figure 5 It is a reference schematic diagram of the vertical deformation of the top generatrix of the convex curve with an arc as the center;
[0051] Figure 6 It is a schematic diagram for reference of the shape of the generatrix of the top of the convex roller with the arc as the convex curve;
[0052] Figure 7It is a reference schematic diagram of the vertical deformation of the top generatrix of the parabola as the convex curve;
[0053] Figure 8 The figure is a reference diagram of the shape of the top generatrix of the convex roller with a parabola as the convex curve;
[0054] Fig. 9 It is a reference schematic diagram of the vertical deformation of the generatrix at the top of the convex curve with the deflection curve as the reference diagram;
[0055] Fig.10 It is a reference schematic diagram of the shape of the top generatrix of the convex roller with the deflection curve as the convex curve;
[0056] Fig.11 It is a reference schematic diagram of the vertical deformation of the generatrix at the top of the convex curve with the fitting function as the reference;
[0057] Fig.12 The figure is a reference diagram of the shape of the top generatrix of the convex roller with a parabola as the convex curve;
[0058] Fig.13 A schematic diagram of the principle structure of a convex curve determination device provided in an embodiment of the present invention. DETAILED DESCRIPTION
[0059] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.
[0060] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.
[0061] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element, or there may be an intervening layer / element therebetween. Additionally, if a layer / element is "on" another layer / element in one orientation, the layer / element may be "below" the other layer / element when the orientation is reversed. In the context of the present disclosure, similar or identical components may be denoted by the same or similar reference numerals.
[0062] In order to better understand the above-mentioned technical scheme, the above-mentioned technical scheme will be described in detail below in combination with specific implementation methods. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical scheme of the present invention, rather than limitations on the technical scheme of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.
[0063] Figure 1 is a flow chart of a method for determining a convex curve provided by an embodiment of the present invention, such as Figure 1 As shown, the method for determining a convex curve includes the following steps:
[0064] S1. Determine the type of the convex curve to be simulated on the convex roller, and establish a corresponding three-dimensional model of the convex roller in the modeling platform according to the type of the convex curve;
[0065] In an embodiment of the present invention, the convex roller is formed by adding a convex curve to the roller. Therefore, the present invention models the roller in advance and obtains a three-dimensional model of the convex roller by adding the convex curve.
[0066] For example, a three-dimensional model of the roller is created in the modeling platform, and corresponding simulation parameters are added. The simulation parameters are, for example, setting the material, dividing the grid, and applying a gravity of 9.8 m / s. 2 , the direction is vertically downward in the -y direction, and under ideal support conditions, a fixed constraint is applied to the roller drive side bearing position, and a bearing constraint is applied to the operating side bearing position. The modeling platform is, for example, SolidWorks; load and constraint application is as follows Figure 2 As shown in the reference, the stress and deformation results obtained by simulation are as follows Figure 3 ad reference shown.
[0067] Since the diaphragm is in contact with the roller surface during operation, the uneven distribution of the axial deformation of the roller surface will affect the tension distribution on the diaphragm and reduce the performance and quality of the diaphragm. Therefore, the extreme difference of the vertical deformation of the roller surface (hereinafter referred to as straightness) is selected as an evaluation index to characterize the uniformity of the vertical deformation of the roller surface, and the minimum straightness is used as the target parameter. For example, the maximum vertical deformation value of the roller surface is -0.006mm, the minimum is -0.595mm, and the extreme difference is 0.589mm. The positive and negative values of the deformation value characterize the direction of the deformation.
[0068] Based on the target parameters, in order to obtain a convex curve that meets the requirements, so as to effectively reduce the vertical deformation of the roller and thus improve the production quality of the diaphragm, the embodiment of the present invention predefines multiple types of convex curves, and selects one of them as the final convex curve according to the simulation result. Specifically, the present invention determines that the types of convex curves to be simulated on the convex roller include:
[0069] See also Figure 4 As shown in the figure, a plane coordinate system is established in the vertical plane where the middle convex roller passes through the top generatrix, the end point of the driving side of the top generatrix is taken as the origin O(0,0), and any point on the top generatrix is set as P(x p ,y p ), with the distance and displacement vertically upward and horizontally to the right as positive, and the distance and displacement vertically downward and horizontally to the left as negative; among them, the definitions are:
[0070] x is the point P(x p ,y p ) is the horizontal distance from point O(0,0), that is, x=x p -0;
[0071] y 1 For point P(x p ,y p ) The vertical deformation of the roller under its own weight;
[0072] y 2 For point P(x p ,y p ) is the vertical distance from point O(0,0) under the action of the roller's own weight, i.e., y 2 =y p +y 1 -0;
[0073] Under the action of the roller's own weight, the straightness of the top generatrix is y 2max -y 2min ;
[0074] Define the convex value as t, and 2t=D max -D min , D is the outer diameter of any circular section of the convex roller.
[0075] Based on the above definition, the straight roller generatrix on the roller can be replaced by a convex curve to obtain the convex roller, and without changing other parameters of the roller and under the condition of deadweight, finite element simulation is performed on the convex roller respectively, and the simulation results are compared to determine the form of the convex curve.
[0076] For example, an arc is drawn with the end point of the driving side, and the arc is used as the convex curve.
[0077] Specifically, an embodiment of the present invention uses the endpoint of the driving side as an arc, and uses the arc as a convex curve, including: on the top generatrix of the roller surface of the convex roller, an arc is determined by the convex value of the endpoint of the operating side, the endpoint of the driving side, and the midpoint (the middle point of the top generatrix), and the arc is used as the convex curve.
[0078] For example, a parabola is drawn with the endpoint of the driving side, and the parabola is a convex curve;
[0079] In the embodiment of the present invention, the endpoint of the driving side is used as a parabola, and the parabola is used as a convex curve, which includes:
[0080] The parabola is defined as:
[0081]
[0082] In the formula, x is the horizontal distance between point P and point O, mm; y is the vertical distance between point P and point O, mm; t is the convex value, in mm; l is the roller length of the convex roller, in mm; and the parabola is the convex curve.
[0083] For example, the end point of the driving side is used as a deflection curve, and the deflection curve is used as a convex curve;
[0084] In the embodiment of the present invention, the end point of the driving side is used as a deflection curve, and the deflection curve is used as a convex curve, which includes:
[0085] The deflection curve is defined as:
[0086]
[0087] Where: x is the horizontal distance between point P and point O, mm; y is the vertical distance between point P and point O, mm; E is the elastic modulus of the material of the convex roller, in MPa; d is the inner diameter of the ring of the convex roller, in mm; D is the outer diameter of the ring of the convex roller, in mm; l is the roller length of the convex roller, in mm; ρ is the density of the convex roller, in kg / mm 3 ; g is the acceleration due to gravity, 9.8m / s 2 ; The deflection curve is a convex curve.
[0088] Specifically, the convex curve equation corresponding to the deflection curve is:
[0089]
[0090] Where q is the uniformly distributed line load, N / mm; I is the moment of inertia of the simply supported beam section, mm 4 .
[0091] For the roller, the moment of inertia of its circular cross section is:
[0092]
[0093]
[0094] For a roller with a length of l, an inner diameter of d, an outer diameter of D, a wall thickness of k (2k = Dd), and a density of ρ, under the condition of support at both ends, its uniformly distributed load is:
[0095]
[0096] Combining the above formulas, we get:
[0097]
[0098] That is, the deflection curve is taken as a convex curve, and the corresponding curve equation is given.
[0099] For example, the endpoints of the driving side are used as a fitting function curve, and the fitting function curve is used as a convex curve.
[0100] In the embodiment of the present invention, the endpoints of the driving side are used as fitting function curves, and the fitting function curves are used as convex curves, including:
[0101] Obtain the reference deformation curve of the top generatrix of the roller in the vertical direction, the reference deformation curve is referenced Figure 3 As shown in d;
[0102] Among them, the method of obtaining the baseline deformation curve of the top busbar of the roller in the vertical direction includes: creating a three-dimensional model of the roller; importing the three-dimensional model of the roller into a simulation platform, and after adding simulation parameters, obtaining a second simulation result, wherein the second simulation result includes the baseline deformation curve of the top busbar of the roller in the vertical direction.
[0103] According to the reference deformation curve, n fittings are respectively performed to obtain n fitting function curves, and one of the n fitting function curves is used as the convex curve of the convex roller, where n is a positive integer not less than 2.
[0104] Specifically, the reference deformation curve is fitted into quadratic, cubic, quartic, quintic and sextic equations respectively, and the fitting function is converted into a convex curve equation for comparative analysis. The convex curve equation is shown below:
[0105] The quadratic function equation is:
[0106] y = 7 × 10 -8 x 2 +4×10 -4 x+2×10 -6 ;
[0107] The cubic function equation is:
[0108] y=-6×10 -24 x 3 -7×10 -8 x2 +4×10 -4 x+2×10 -6 ;
[0109] The equation of the quartic function is:
[0110] y = 3 × 10 -20 x 4 -3×10 -16 x 3 -7×10 -8 x 2 +4×10 -4 x+2×10 -6 ;
[0111] The equation of the quintic function is:
[0112] y=-6×10 -29 x 5 +3×10 -20 x 4 -3×10 -16 x 3 -7×10 -8 x 2 +
[0113] 4×10 -4 x+2×10 -6 ;
[0114] The sixth-order function equation is:
[0115] y=-8×10 -27 x 6 -10 -22 x 5 +9×10 -19 x 4 +3×10 -15 x 3 -7×10 -8 x 2 +
[0116] 4×10 -4 x+2×10 -6 .
[0117] S2, importing the three-dimensional model of the convex roller corresponding to each type of the convex curve into the simulation platform, setting the simulation parameters in sequence, performing finite element simulation, and obtaining a first simulation result;
[0118] In an embodiment of the present invention, finite element simulation is performed on each type of the convex curve to obtain a first simulation result, and the simulation platform is, for example, simulation, matlab, etc.
[0119] Specifically, for example, for the arc as the convex curve, the shape of the arc is related to the convex value, and the convex value range is 0.4-1mm, the interval is 0.1mm, that is, the convex values are set to 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm in sequence, and finite element simulations are performed respectively. The results are as follows: Figure 5 shown.
[0120] Table 1 Minimum vertical deformation of the top generatrix with the arc as the convex curve
[0121]
[0122] Depend on Figure 5 It can be seen that the six deformation curves are basically overlapped. It can be seen from Table 1 that the minimum deformation value is about -0.59 mm and the difference is small. For the roller with an arc as the convex curve, the change of the convex value has a negligible effect on the vertical deformation of any point on the top generatrix of the roller under the action of its own weight.
[0123] Table 2: The straightness of the top generatrix under the influence of the roller's own weight, with the arc as the convex curve
[0124]
[0125] From Table 2 and Figure 6 It can be seen that when t≤0.6mm, the straightness of the top generatrix decreases with the increase of the convex value, and when t≥0.6mm, the straightness of the top generatrix increases with the increase of the convex value, that is, when t=0.6mm, the straightness of the top generatrix is the smallest. And the absolute value of the minimum vertical deformation is 0.59mm, so when the arc is the convex curve, the convex value should be the absolute value of the minimum vertical deformation, that is, t=-y 1min .
[0126] For example, for a parabola as a convex curve, since the parabola equation is determined by the roller length l and the convex value t, the convex value range is 0.4-1mm, and the interval is 0.1mm, that is, the convex values are set to 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1mm respectively.
[0127] Finite element simulations were performed on convex rollers with parabolic convex curves and different convex values under the influence of the roller's own weight. The results are as follows: Figure 7 shown.
[0128] Table 3 Taking the parabola as the convex curve, the minimum vertical deformation of the top generatrix
[0129]
[0130] Depend on Figure 7It can be seen that the six deformation curves are basically overlapped. It can be seen from Table 3 that the minimum deformation value is about -0.59 mm and the difference is small. For the roller with a parabola as the convex curve, the change of the convex value can be ignored for the vertical deformation of any point on the top generatrix of the roller under the action of its own weight.
[0131] Table 4: The straightness of the top generatrix under the influence of the roller's deadweight, with the parabola as the convex curve
[0132]
[0133] It can be seen from Tables 4 and 8 that when t≤0.6mm, the straightness of the top generatrix decreases with the increase of the convex value, and when t≥0.6mm, the straightness of the top generatrix increases with the increase of the convex value, that is, when t=0.6mm, the straightness of the top generatrix is the smallest. And the absolute value of the minimum vertical deformation is 0.59mm, so when the parabola is the convex curve, the convex value should be taken as the absolute value of the minimum vertical deformation, that is, t=-y 1min .
[0134] For example, for a convex curve with a deflection curve, a simulation analysis is performed under the influence of the roller's own weight. The results are as follows: Fig. 9 As shown. Combined Fig.10 As shown in Table 5, the deflection curve is a convex curve, and the vertical deformation trend and minimum value are consistent with the arc and parabola, and the straightness is close to the arc and parabola with t = 0.7 mm.
[0135] Table 5: With the deflection curve as the convex curve, the straightness of the top generatrix under the influence of the roller's own weight
[0136]
[0137] For example, for the convex curve with fitting function, simulation analysis is performed respectively, and the results are as follows Fig.11 shown.
[0138] Table 6 Minimum vertical deformation of the top generatrix when the fitting function is a convex curve
[0139]
[0140] Depend on Fig.11 It can be seen that the five deformation curves are basically overlapped. It can be seen from Table 6 that the minimum deformation is about -0.59 mm and the difference is small. For the roller with the fitting function as a convex curve, the change in the order of the highest order term of the fitting function has a negligible effect on the vertical deformation of any point on the top generatrix of the roller under the action of its own weight.
[0141] Table 7: With the parabola as the convex curve, the straightness of the top generatrix under the influence of the roller's own weight
[0142]
[0143] It can be seen from Table 7 that when the degree of the highest-order term of the fitting function is ≤ five, the straightness of the top generatrix decreases with the increase of the degree. When the degree of the highest-order term of the fitting function is ≥ five, the straightness of the top generatrix increases with the increase of the convex value. That is, when the degree of the highest-order term of the fitting function is five, the straightness of the top generatrix is the smallest.
[0144] Depend on Fig.12 It can be seen that when the fitting function is a sixth-order function, the shape of the top generatrix is quite different from that of the top generatrix of other functions. Combined with the changing trend of straightness, there is no need to fit to a higher-order function, that is, the highest fitting function is sixth-order.
[0145] S3. Obtain target parameters, and determine a final convex curve of the convex roller according to the target parameters and the first simulation result.
[0146] Combined with all the first simulation results obtained in step S2, they are summarized as shown in the following Table 8:
[0147] Table 8 Comparison of the straightness of the top generatrix of convex rollers with different convex curves under the influence of the roller's own weight
[0148]
[0149] Based on the various types of convex curves actually obtained, 19 first simulation results are obtained. Corresponding to Table 8, it can be seen that the minimum deformation values of the convex roller in the vertical direction corresponding to the 19 different convex curves are basically the same, all about -0.59 mm, and the difference is small. It can be determined that the influence of the form of the convex curve on the vertical deformation of the roller is negligible.
[0150] Taking straightness as the evaluation standard, the optimal convex curve is the fitting function of the quintic function through comparison in Table 8. That is, the finite element simulation of the roller is performed, and the deformation curve in the vertical direction of its top generatrix is fitted with a quintic function. This function is the optimal convex curve corresponding to this roller.
[0151] Of course, it should be noted that the straightness of the straight roller is 0.589 mm, and the straightness of the convex rollers corresponding to the four types and 19 different convex curves in Table 8 are all less than 0.589 mm, that is, they all meet the requirements. Based on actual application needs, such as considering economic cost factors, processing difficulty, etc., the actual required target parameters can be changed, and the embodiments of the present invention have no restrictions on this.
[0152] The convex curve determination method described in the embodiment of the present invention predefines multiple types of convex curves and performs finite element simulations respectively, and determines the final convex curve of the convex roller based on target parameters and simulation results. This can reduce the vertical deformation of the roller and thereby improve the production quality of the diaphragm, provide a reference for the convex curve design of the convex roller, and has a good application prospect.
[0153] Based on the above embodiment, as the above Figure 1 The present invention provides an embodiment of a convex curve determination device, which is similar to Figure 1 Corresponding to the method embodiment shown, the device can be specifically applied to various electronic devices, see Fig.13 As shown, the convex curve determining device comprises:
[0154] The curve analysis module 100 is used to determine the type of the convex curve to be simulated on the convex roller, and to establish a three-dimensional model of the convex roller in the modeling platform according to the type of the convex curve;
[0155] A simulation module 200, for importing the three-dimensional model of the convex roller corresponding to each type of the convex curve into a simulation platform, setting simulation parameters in sequence, performing finite element simulation, and obtaining a first simulation result;
[0156] The evaluation module 300 is used to obtain target parameters and determine a final convex curve of the convex roller according to the target parameters and the first simulation result.
[0157] The convex curve determination device described in the embodiment of the present invention can execute the convex curve determination method provided in the above embodiment. The convex curve determination device has the corresponding functional steps and beneficial effects of the convex curve determination method described in the above embodiment. Please refer to the embodiment of the above convex curve determination method for details. The embodiment of the present invention will not be repeated here.
[0158] The embodiment of the present invention also provides an electronic device, which may include a processor and a memory, wherein the processor and the memory may be connected via a bus or other means. The processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components and other chips, or a combination of the above-mentioned various types of chips. The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs, non-transient computer executable programs and modules, such as program instructions / modules corresponding to the convex curve determination method in the embodiment of the present invention. The processor executes various functional applications and data processing of the processor by running the non-transient software programs, instructions and modules stored in the memory, that is, the convex curve determination method in the above method embodiment is realized.
[0159] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. The one or more modules are stored in the memory, and when executed by the processor, the convex curve determination method in the above method embodiment is executed. The specific details of the above electronic device can be understood by corresponding to the corresponding descriptions and effects in the above method embodiment, and will not be repeated here. Those skilled in the art can understand that all or part of the processes in the above embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program, when executed, may include the processes of the embodiments of the above methods. Among them, the storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memory.
[0160] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.
[0161] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.
[0162] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.
Claims
1. A method for determining a convex curve, characterized in that: The convex curve determination method comprises: Determine the type of the convex curve to be simulated on the convex roller, and establish corresponding three-dimensional models of the convex roller in the modeling platform according to the type of the convex curve; Importing the three-dimensional model of the convex roller corresponding to each type of the convex curve into the simulation platform, setting the simulation parameters in sequence, performing finite element simulation, and obtaining a first simulation result; Target parameters are acquired, and a final convex curve of the convex roller is determined according to the target parameters and the first simulation result.
2. The method for determining a convex curve according to claim 1, characterized in that: Determining the type of the convex curve to be simulated on the convex roller includes: A plane coordinate system is established in the vertical plane where the convex roller passes through the top generatrix, the end point on the driving side of the top generatrix is taken as the origin O, any point on the top generatrix is set as P, the distance and displacement vertically upward and horizontally to the right are positive, and the distance and displacement vertically downward and horizontally to the left are negative; An arc is made with the end point of the driving side, and the arc is used as a convex curve; A parabola is drawn with the endpoint of the driving side, and the parabola is a convex curve; A deflection curve is formed by taking the end point of the driving side as a convex curve; The end point of the driving side is used as a fitting function curve, and the fitting function curve is used as a convex curve.
3. The method for determining a convex curve according to claim 2, characterized in that: The method of making an arc with the endpoint on the driving side and using the arc as the convex curve includes: on the top generatrix of the roller surface of the convex roller, an arc is determined by three points: the endpoint on the operating side, the endpoint on the driving side, and the convex value of the midpoint, and the arc is used as the convex curve.
4. The method for determining a convex curve according to claim 2, characterized in that: The method of using the endpoint of the driving side as a parabola and using the parabola as a convex curve includes: The parabola is defined as: Wherein, x is the horizontal distance between point P and point O, mm; y is the vertical distance between point P and point O, mm; t is the convex value, mm; l is the roller length of the convex roller, mm; The parabola is taken as a convex curve.
5. The method for determining a convex curve according to claim 2, characterized in that: The method of using the end point of the driving side as a deflection curve and using the deflection curve as a convex curve includes: The deflection curve is defined as: Where: x is the horizontal distance between point P and point O, mm; y is the vertical distance between point P and point O, mm; E is the elastic modulus of the material of the convex roller, MPa; d is the inner diameter of the ring of the convex roller, mm; D is the outer diameter of the ring of the convex roller, mm; l is the roller length of the convex roller, mm; ρ is the density of the convex roller, kg / mm 3 ; g is the acceleration due to gravity, 9.8m / s 2 ; The deflection curve is a convex curve.
6. The method for determining a convex curve according to claim 2, characterized in that: The step of using the endpoint of the driving side as a fitting function curve and using the fitting function curve as a convex curve comprises: Obtaining a reference deformation curve of the top generatrix of the roller in the vertical direction, wherein the convex roller is formed by adding a convex curve to the roller; According to the reference deformation curve, n fittings are respectively performed to obtain n fitting function curves, and one of the n fitting function curves is used as the convex curve of the convex roller, where n is a positive integer not less than 2.
7. The method for determining a convex curve according to claim 6, characterized in that: The step of obtaining a reference deformation curve of the top generatrix of the roller in the vertical direction comprises: Creating a three-dimensional model of the roller for the roller; The three-dimensional model of the roller is imported into the simulation platform, and after adding simulation parameters, a second simulation result is obtained, and the second simulation result includes a reference deformation curve of the top generatrix of the roller in the vertical direction.
8. A convex curve determination device, applied to the convex curve determination method according to any one of claims 1 to 7, characterized in that: The convex curve determining device comprises: A curve analysis module, used to determine the type of the convex curve to be simulated on the convex roller, and to establish a three-dimensional model of the convex roller in the modeling platform according to the type of the convex curve; A simulation module, used for importing the three-dimensional model of the convex roller corresponding to each type of the convex curve into the simulation platform, setting simulation parameters in sequence, performing finite element simulation, and obtaining a first simulation result; An evaluation module is used to obtain target parameters and determine a final convex curve of the convex roller according to the target parameters and the first simulation result.
9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, which are loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 7.
10. An electronic device comprising a processor and a memory, characterized in that: The memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, the processor implements instructions of any one of the methods described in claims 1-7.