WO2023060857A1

WO2023060857A1 - Tire rubber piece arrangement calculation method and system, and medium, product, device and terminal

Info

Publication number: WO2023060857A1
Application number: PCT/CN2022/086128
Authority: WO
Inventors: 张晓辰; 黄伟; 赵巍; 李涛; 门喜德
Original assignee: 天津赛象科技股份有限公司
Priority date: 2021-10-12
Filing date: 2022-04-11
Publication date: 2023-04-20
Also published as: CN113642135A; CN113642135B

Abstract

The present invention relates to the technical field of tire winding. Disclosed are a tire rubber strip arrangement calculation method and system, and a medium, a product, a device and a terminal. The method comprises: a user inputting, into software, a tire blank radius, a tire shoulder radius, a contour correction coefficient, a flat width, a total width, a rubber strip winding parameter, a winding head device parameter and a winding weight parameter; generating a layering contour parameter by means of a process contour layering algorithm; generating rubber strip arrangement data by means of a rubber strip profiling arrangement positioning algorithm; and converting rubber strip positioning information into an electric motor control parameter by means of an electric motor cam motion control parameter conversion algorithm for a winding head device, and calculating a tire shoulder turning angle and theoretical weight. By means of the software in the present invention, a repeated trial winding operation of a traditional tire winding process is converted into the procedure of repeatedly simulating and designing a profiling contour, thereby improving the trial winding success rate of a user.

Description

Calculation method, system, medium, product, equipment, terminal for tire strip arrangement

technical field

[Corrected 31.05.2022 under Rule 91]
The disclosure of the present invention relates to the technical field of machinery, and in particular to a calculation method and system for automatic arrangement of tire winding rubber strips, a computer-readable storage medium, a computer program product, computer equipment, and an information data processing terminal.

Background technique

In the tire production process, the winding process has a long history; in the production process of engineering tires and giant tires, the winding molding method is widely used. The traditional winding equipment adopts the method of winding first and then correcting, which requires repeated debugging. The trial production of a new specification tire winding formula took too long to debug, which caused a huge waste of raw materials and manpower, and was also restricted by production personnel and time in terms of control accuracy.

The difficulty in solving the above technical problems lies in the fact that there are differences in the winding shape and winding weight of tires of different specifications, and the production technology and rubber varieties used by each tire manufacturer are also different, which leads to the design of a universal tire. There are difficulties in the calculation method; the winding process needs to be formed by a continuous nonlinear winding head cam movement, which results in high complexity in the calculation process and control process, and high verification costs; in order to provide users with flexible configuration software, it is necessary The calculation method can have more adjustable parameters and configurable steps. At the same time, it is also necessary to consider reducing the difficulty of learning and use for users. It is suitable for users of different technical levels, and requires less manual input for the calculation method; Providing users with a software interface with strong visualization and high degree of simulation can greatly reduce the difficulty for users to use, but at the same time increases the difficulty of displaying calculation results.

The significance of solving the above-mentioned technical problems lies in that the present invention provides users with a quick-operation, graphical adhesive strip arrangement aided design software tool, enabling users to realize simulation debugging, and users can use the software to provide automatic arrangement algorithms to reduce the design difficulty and workload, thereby shortening the trial production process of new specification tire winding process.

Contents of the invention

In order to overcome the problems existing in the related technologies, the disclosed embodiments of the present invention provide a calculation method, medium, product, equipment, and terminal for automatic arrangement of tire winding rubber strips. Based on the rubber strip stacking simulation system, the process outline input by the user is used as the profiling winding target to realize the automation of the positioning and arrangement process of the rubber strips; the technical scheme is as follows:

The method for calculating the automatic arrangement of tire winding rubber strips includes the following steps:

Step 1. The user enters the tire embryo radius, tire shoulder radius, contour correction coefficient, flat width, total width, winding rubber strip parameters, winding head equipment parameters, and winding weight parameters in the software;

Step 2, generate layered profile parameters through the process profile layered algorithm;

Step 3, through the adhesive strip profiling arrangement positioning algorithm, the adhesive strip arrangement data is generated;

Step 4: Through the conversion algorithm of motor cam motion control parameters of the winding head equipment, the rubber strip positioning information is converted into motor control parameters, and the tire shoulder angle and theoretical weight are calculated.

In one embodiment, in step 3, the adhesive strip profiling arrangement positioning algorithm uses m points to describe the discrete function f(x)=y1, y2...ym of the profiling contour line, and n points describe All adhesive strip stacking line discrete functions g(x)=g1, g2....gn, take the intersection point Q of f(x) and g(x) as the starting point for calculation;

Apply the discrete function calculation method of the cross-section contour line of the rubber strip to obtain k discrete functions s(x)=s0, s1...sk of the contour line describing the upper surface of the cross-section of the rubber strip, and calculate s(x) and f(x ) to get P1, P2...Pz;

In the {Q,Pz} interval, find

When the value S is less than the preset threshold R, determine the position of the glue strip, and finally replace all points of s(x) with g(x), and generate new glue at all points in the interval {g(s0), g(sk)} Discrete function gnew(x) of stacked lines; when the value S is greater than or equal to the preset threshold R, move Q point horizontally by △x distance, and ensure that Q point is located on g(x), obtain a new Q point, and then repeat the above calculation process;

When the x-axis coordinate value of Q exceeds the x-axis coordinate value of point ym, the calculation process is terminated;

When the number of intersection points n is greater than or equal to 2,

When it is larger than the cross-sectional area of the rubber strip, iterate the above calculation process repeatedly to determine the arrangement position of all the rubber strips, otherwise, terminate the calculation process;

When the number of intersection points n is equal to 1, then

When the number of intersection points n=0, it belongs to the user's technological profile input error, otherwise, the calculation process is terminated;;

The calculation method of the discrete function of the profile line of the strip section is to divide the section of the trapezoidal strip horizontally into m blocks, and finally obtain 2 triangular areas, several trapezoidal areas and several rectangular areas;

The calculation is derived from one side to the other, and there are two cases of "from left to right" and "from right to left". When calculating from left to right, the leftmost graphic is marked as b0 area, followed by b1, b2, ... bn, the lower left corner of the leftmost graphic area is the key point marked as P0, and the lower right corner point of the rightmost graphic area is the key point marked as Pnx point; when calculating from right to left, the most The graphic on the right is marked as b0 area, followed by b1, b2, ... bn, the lower right corner of the rightmost graphic is the key point marked as P0, and the point at the leftmost lower left corner is the key point marked as Pnx point;

In the calculation process, first set P0 as a point on the discrete function g(x) of the glue strip stacking line, draw a circle with P0 as the center and the length of the lower base of b0 as the radius, and intersect with g(x) to obtain 2 The intersection points are recorded as the left point of newP1 and the right point of newP1. According to the derivation direction, that is, from left to right, select newP1 right; from right to left, select newP1 left, and record it as P1; then take P1 as the center, repeat the above Calculation process, calculate the key points P3, P4, P5, ...Pn of b2, b3,...bn, and draw a circle with Pn as the center and the length of the lower base of bn as the radius, and intersect with g(x), Obtain two intersection points and record them as newPn left point and newPn right point, and calculate the corresponding Pnx point according to the derivation direction;

Connect the two points P0 and P2, calculate the normal vector E1->P1 passing through the point P1, connect E1->P1, P1->P0 and P0->E1 to form a triangle, and obtain it by changing the modulus of the E1->P1 vector E1->P1new, make the area of the triangle equal to the area of b0, determine the simulation winding shape of b0 and the new vector E1->P1new;

Connect the two points P1 and P3, calculate the normal vector E2->P2 passing through the point P2, connect P1->P1new, P1->E2, E2->P2, P1new->P2 to form a quadrilateral, by changing E2-> The modulus of the P2 vector obtains E2->P2new to make the area of the quadrilateral equal to the area of b1, determine the simulation winding shape of b1 and the new vector E2->P2new, and so on, determine the values of b2, b3,...bn-2 Simulates winding shapes.

Connect Pn-1 and Pnx, calculate the normal vector En->Pn passing through the Pn point, connect En->Pn, En->Pnx and Pn->Pnx to form a triangle, and connect Pn-1->Pn-1new, Pn-1->En, En->Pn, Pn-1new->Pn are connected to form a quadrilateral, and En->Pnnew is obtained by changing the modulus of the En->Pn vector so that the sum of the area of the triangle and the area of the quadrilateral is equal to bn and The sum of the areas of bn-1 finally determines the simulation winding area of bn and bn-1;

All graphic areas form a complete simulation shape of the rubber strip section, and the discrete function s(x)=s0, s1...sk of the upper surface contour line of the rubber strip is obtained by connecting each figure;

Another object of the present invention is to provide a system for realizing the calculation method for the automatic arrangement of tire wrapping strips. The automatic arrangement calculation system for tire wrapping strips includes:

The human-computer interaction module for inputting calculation parameters is used to manually inject initial parameter values into the system;

The contour parameter subdivision calculation module divides the contour parameters entered by the user into multiple layers according to the specific layering calculation method selected by the user and the entered winding rubber strip parameters, and generates the contour parameters of each layer;

The rubber strip automatic arrangement calculation module calculates the winding head cam trajectory and the rubber strip simulation contour, and generates the winding head cam trajectory based on the contour center coordinate system;

The winding head control parameter calculation module calculates and obtains the three-axis winding head motor cam control parameters according to the winding head cam trajectory, equipment parameters, tire embryo radius, tire shoulder radius, flat width, etc., and generates a motor whose reference frame is the mechanical winding head Cam control parameters.

The human-computer interaction module for inputting calculation parameters includes:

The total width is 750 mm, the flat width is 400 mm, and the embryo radius is 888 mm;

center offset 0 mm;

The top width of the strip is 30 mm, the bottom width is 60 mm, and the thickness is 5 mm;

The zero point direction of the equipment is on the right side (that is, when the X-axis is 0, the winding head is at the rightmost position), the X-axis is 1202, the Y-axis is 1362.15, and the radius of the rotating head is 320.

The winding direction is from the left

The contour parameter subdivision calculation module adopts the thickness equalization method, and the maximum thickness input by the user is: 45 mm graphics are divided into 3 layers of layered contour parameters;

The automatic arrangement calculation module of the rubber strips calculates from the leftmost side of the bottom layer 1 to generate the profiling contour of the winding rubber strips and the cam track of the winding head;

The winding head control parameter calculation module generates 128 three-axis winding head motor control parameter sequences based on the winding head cam trajectory calculated in the previous step, according to the shoulder radius, tire embryo radius, equipment parameters, and correction parameters.

In one embodiment, the human-computer interaction module for inputting calculation parameters is also provided with a display interface for inputting total width, embryo radius, contour parameters, top width, low width, thickness of the winding rubber strip, and winding head The input interface of the rotation radius, X axis and Y axis of the equipment parameters.

Another object of the present invention is to provide a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the calculation method for automatic arrangement of tire winding rubber strips.

Another object of the present invention is to provide a computer program product stored on a computer-readable medium, including a computer-readable program, when executed on an electronic device, a user input interface is provided to implement the automatic discharge of the tire winding rubber strip. Cloth calculation method.

Another object of the present invention is to provide a computer device, the computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following step:

Another object of the present invention is to provide an information data processing terminal, the information data processing terminal includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the The processor executes the calculation method for automatically arranging tire winding rubber strips.

The technical solutions provided by the embodiments disclosed in the present invention have the following beneficial effects:

First, through the software of the present invention, the repeated trial winding work of the traditional tire winding process is transformed into a process of repeated simulation and design of the profiling contour, which improves the success rate of the user's trial winding; compared with the manual design, the calculation method of the present invention, The cam trajectory comparison is shown in Figure 11(a) and Figure 11(b), and the data comparison is as follows:

Under the same process profile and under the condition that the winding process is qualified, the present invention requires 128 stages of cam motion control for calculation, and 129 stages for manual design, which achieves higher calculation accuracy; compared with manual design, the winding weight saves about 0.5 rubber %.

Second, the present invention decomposes the process of automatic glue removal calculation into several independent automatic calculation steps, compresses the amount of calculation, and provides the user with an opportunity to adjust parameters at each step, so that the user can obtain automatic glue strip arrangement The convenience, but also retains the degree of freedom to adjust the process parameters more flexibly.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a software main parameter entry and display interface diagram provided by the present invention;

Fig. 2 is the process profile parameter setting software interface figure provided by the present invention;

Fig. 3 is a two-dimensional Cartesian coordinate system data display interface diagram corresponding to the process profile provided by the present invention;

Fig. 4 is an explanatory diagram of the physical meaning corresponding to some parameters provided by the present invention;

Among them, Figure a is an illustration of the physical meaning of the total width, flat width, tire embryo radius, shoulder radius, and center offset; Figure b is the physical meaning of the top width, thickness, and bottom width of the rubber strip parameters, as well as the equipment parameters. Explanatory diagram of the physical meaning of X axis, Y axis, winding head radius, and mechanical zero point;

Fig. 5 is a schematic diagram of the calculation result of the second step layered profile data provided by the present invention;

Fig. 6 is a two-dimensional Cartesian coordinate system data display interface diagram of a layered profile provided by the present invention;

Fig. 7 is the two-dimensional Cartesian coordinate system data display interface diagram of the third step calculation result provided by the present invention;

Fig. 8 is a partial zoom function interface diagram of the software of Fig. 7 provided by the present invention;

Fig. 9 is an explanatory diagram of the positioning algorithm of the strip profiling arrangement provided by the present invention;

Fig. 10 is a two-dimensional Cartesian coordinate system data display interface diagram of the calculation result of the fourth step provided by the present invention;

Fig. 11(a) is a partial winding track diagram of the tread section on the 29.5R25TUL400 specification OTR tire by using the automatic arrangement calculation method of the present invention;

Fig. 11 (b) is the manual design of the present invention on the 29.5R25TUL400 specification OTR tire partial winding trajectory diagram of the tread segment;

Fig. 12 is a partially enlarged view of a section design provided by the present invention;

Fig. 13(A) shows the change diagram of the g(x) and gnew(x) curves before the positioning calculation in Fig. 9;

Fig. 13(B) shows the change diagram of g(x) and gnew(x) curves after the positioning calculation in Fig. 9;

Figure 14 (A) shows the third step of the automatic layered profiling arrangement algorithm, specifying the number of the No. 41 rubber strip of the first layer

the integral area of

Figure 14 (B) shows the third step of the automatic layered profiling arrangement algorithm, specifying the number of the No. 41 rubber strip of the first layer

the integral area of

Figure 15 shows the rubber strip section segmentation diagram and key points in the calculation method of the rubber strip section contour line discrete function;

Figure 16(A) shows

The corresponding integral area of ;

Figure 16(B) shows

The corresponding integral area of ;

Figure 16(C) shows

The corresponding integral area of ;

Figure 16(D) shows

The corresponding integral area of ;

Fig. 17 (A) shows in the calculation method of the discrete function of the rubber strip cross-section contour line of the second rubber strip of the first layer "from left to right" to derive and calculate the circular arc positioning method of P0 to P5;

Figure 17(B) shows the calculation area of the b3 area simulation winding graphics in the calculation method of the discrete function of the strip section contour line is the quadrilateral area formed by E4->P4new, P3->E4, P3->P3new and P3new->P4new , and the vector E4->P4new direction.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the present invention are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by one of ordinary skill in the technical field of the present invention. The terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The user operation and internal calculation steps of the embodiment are as follows:

In this embodiment, the tread formula of a certain specification is taken as an example, and the first step of main parameter setting is completed first.

Obtain the following parameters as shown in Figure 1 by inputting through the computer keyboard in the human-computer interaction interface:

Center offset 0 mm, shoulder radius 350 mm;

Density 1.101 g/cm3;

The zero point direction of the equipment is on the right side, the X axis is 1202, the Y axis is 1362.15, and the radius of the rotating head is 320.

Refer to Figure 4(a,b) for the above parameters to understand the corresponding physical meaning

The winding direction is from left to right.

Then enter the parameters of the process profile as shown in Figure 2. The parameters are described by relative coordinates, that is, the thickness corresponds to the Y axis, and the offset is the cumulative sum of the offset values of the adjacent points on the X axis of the 0-point symmetrical axis in the center.

The software internally converts the process profile parameters shown in Figure 2 into the following absolute value coordinate discrete functions for calculation

{(-375,0),

(-332,23),

(-290,45),

(-250,45),

(-210,44.4),

(-170,43.75),

(-130,43.1),

(-90,43),

(-50,43),

(0,43), center point

(50,43),

(90,43),

(130,43.1),

(170,43.75),

(210,44.4),

(250,45),

(290,45),

(332,23),

(375,0)};

The software will draw the adjusted graphics in real time according to the numerical changes of the process profile input by the user, as shown in Figure 3.

In the second step, the embodiment adopts the "thickness equalization method" to divide the process profile into 3 layers, and the calculation result value is displayed through the interface as shown in Figure 5;

The thickness equalization method is one of the process contour layering algorithms, which generates layered contour parameters, that is, generates several contour line discrete functions f(x), followed by 1 layer f1(x), 2 layers f2(x)...n Layer fn(x), after this stage, the user can check the value of each coordinate point of each function of the calculation results f1(x), f2(x)...fn(x) on the interface shown in Figure 5 fp is modified to generate the user's target profile, and the process profile layering algorithm can also be repeatedly executed, and the parameters of the first step can also be modified; due to the large difference in the shape of the tire winding process profile, a specific layering algorithm is difficult to satisfy And applicable to various situations, therefore, the software integrates several contour layering algorithms; including, thickness equalization method, flat layer method, middle wrapping method; thickness equalization method is based on the number of layers n specified by the user, will The process profile discrete function f(x) is converted into several new layers of discrete functions f1(x), f2(x)...fn(x), and the conversion formula of each coordinate point in the layered profile discrete function of each layer is {x , i/n*y}, where i={1:n} is the number of layers; the flat layer method and the middle wrapping method are both optimization algorithms realized on the basis of the thickness equalization method; the flat layer method optimizes the starting point of each layer and the end point; the middle winding method optimizes the winding starting point to be the center of the bottom surface of the process profile.

Figure 6 is a graphical display interface of the two-dimensional Cartesian coordinate system data of all layered contours after layered calculation using the thickness equalization method.

The third step is to generate the adhesive strip arrangement data through the adhesive strip profiling arrangement positioning algorithm. At this stage, the user can either automatically process all the layers with one button, or alternately calculate manually and automatically.

One-click fully automatic processing, that is, the user clicks the calculation start button once, and the system starts to calculate from f1(x) generated in the previous step to fn(x), with a total of N layers, and completes all the functions of layered profiling layout calculations. Fig. 7 shows the image after the one-button automatic processing is completed, and Fig. 8 is a partial enlarged view of Fig. 7, showing the local details of the strip profiling arrangement positioning algorithm of the present invention;

The automatic layered profiling arrangement is performed by the user to specify a specific layer, such as: "specify the first layer", to execute the strip arrangement positioning algorithm;

Manual profiling arrangement is a function that the user inputs the starting point coordinate P of profiling calculation, and the system completes a profiling layout positioning calculation function;

Manual and automatic alternate calculation means that the user alternately uses the functions of manual profiling layout and automatic layered profiling layout to complete the process of profiling layout calculation from layer 1 to layer N.

The calculation method for the profiling arrangement and positioning of the above rubber strips is, firstly, according to the current number of layers as "layer 1", corresponding to f1(x), the winding direction entered by the user is "winding from the left", then, when the number of layers is an odd number , it is the same as the winding direction specified by the user, and the algorithm deduces and calculates from left to right; when the number of layers is even, it is opposite to the winding direction specified by the user. Figure 9 shows that the current layer is the second film of the first layer The calculation key points and function marker diagram of the strip, the calculation and derivation direction is "from left to right"; then, according to the discrete function g(x) of the stacked line of the current strip, the intersection point Q of f(x) and g(x) is calculated as the calculation The starting point, the coordinates are (-375,0).

Among them, the discretization function g(x)=g1, g2...gn of the strip stacking line is to use n discrete points to describe the simulated tread curve, and each time the position of a strip is determined, a new simulated tread curve will be generated gnew(x), Figure 13 shows the change of g(x) and gnew(x) curves before and after the calculation in Figure 9.

After determining the coordinates of the Q point, the discrete function s(x)=s0, s1...sk of k describing the surface contour line on the section of the rubber strip is obtained by using the calculation method of the discrete function of the section contour line of the rubber strip, Fig. 15 It shows the strip section segmentation diagram and key points in the calculation method of the discrete function of the cross-section contour line of the rubber strip. Figure 17 (A) shows the calculation method of the discrete function of the cross-section contour line of the second rubber strip in the first layer In the "from left to right" derivation and calculation of the arc positioning method from P0 to P5, Figure 17 (B) shows the calculation method of the discrete function of the strip section contour line in the b3 area simulation winding graphics calculation area is E4->P4new, The quadrilateral area formed by P3->E4, P3->P3new and P3new->P4new, and the direction of the vector E4->P4new, and then calculate all the intersection points of s(x) and f(x) to get P1, P2... Pz;

In the {Q,Pz} interval, find

Figure 16 shows

The corresponding integral area of .

The judgment threshold R is selected as 15 square millimeters, which means that the cross-section of each rubber strip is within the interval {Q, PZ}, and the offset

After the area, the figure of f(x) shall not protrude by 15 square millimeters.

When the value S is less than the preset threshold R, determine the position of the glue strip, and finally replace all points of s(x) with g(x), and generate new glue at all points in the interval {g(s0), g(sk)} Discrete function gnew(x) of stacked lines; when the value S is greater than or equal to the preset threshold R, move point Q horizontally by 0.05 mm, and ensure that point Q is always on g(x), repeat the above calculation process, after many times Calculation, as shown in Figure 9, finally when the point Q is (-345,5), the condition S is less than the threshold R is satisfied, the position of the glue strip is determined, and gnew(x) is generated.

Follow up in

When it is larger than the cross-sectional area of the rubber strip, iteratively determine the arrangement position of all the rubber strips. Figure 14 shows the No. 41 rubber strip of the first layer.

and

The integral area of , after the above formula

The calculation is confirmed, and the glue strips need to be placed continuously, and finally 43 glue strips are generated on the first layer;

The fourth step is to convert the rubber strip positioning information into motor control parameters through the motor cam motion control parameter conversion algorithm of the winding head equipment, and calculate the tire shoulder angle and theoretical weight. The user can repeatedly adjust the parameters of the first few steps to affect the control position of the winding head and change the trend of the winding weight. As an important indicator in the tire winding process, winding weight must provide users with technical means to adjust its value. The winding weight is related to the product of the strip density, the cross-sectional area of the strip and the winding length of the strip. In the first step, the user adjusts the rubber strip density according to the rubber variety selected by the winding process, which will change the winding weight; in the first step, the user changes the rubber strip that affects the cross-sectional area of the rubber strip according to the shape of the rubber strip produced by the rubber extruder equipment. The parameters of top width, bottom width and thickness will change the winding weight; in the first step, the user adjusts the shoulder radius and tire embryo radius, which will cause the trajectory of the winding head to change in the calculation of this step, which will eventually lead to a change in the winding length of the rubber strip, resulting in The winding weight changes; the user changes the winding profile parameters in the second step, which will affect the calculation results of the third step, and finally affect the trajectory of the winding head and the winding length of the rubber strip, resulting in a change in the winding weight.

As shown in Figure 4, the total width of the main parameter corresponds to the X-axis range of the process contour winding; the flat width of the main parameter corresponds to the parallel movement range of the X-axis motor of the winding head; the embryo radius of the main parameter is the center axis of the forming drum to the winding surface The distance; the shoulder radius of the main parameter determines the speed and range of bending on both sides of the winding body; the center offset of the main parameter is the distance between the midpoint of the equipment parameter and the 0 point of the process profile;

The X-axis of the equipment parameter corresponds to the distance from the mechanical zero point to the center of the X-axis of the forming drum; the Y-axis of the equipment parameter corresponds to the distance from the mechanical zero point to the surface of the forming drum; the radius of the rotating head of the equipment parameter corresponds to the rotating radius of the rotating head of the mechanical structure of the winding head ; The top width, bottom width, and thickness of the rubber strip parameters correspond to the cross-sectional shape parameters of the isosceles trapezoidal rubber strip.

In the third step of this embodiment, the one-button automatic strip arrangement algorithm is used to generate the positions of all strips, and the software displays the winding process contour line, the layered winding contour line, and the two-dimensional Cartesian coordinate system in Figure 7. Figure 8 is a partial enlarged view provided by the software for the curve data of the cross-sectional shape of the rubber strip stack;

Finally, the fourth step of calculation is completed to generate the equipment motor cam motion control parameters, and finally the final layout effect of the simulation winding is shown in Figure 10.

In this embodiment, the process of tread formulation from process outline to generation of strip arrangement design is described.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure shall be limited by the appended claims.

Claims

A calculation method for automatically arranging tire winding rubber strips, characterized in that the calculation method for automatically arranging tire winding rubber strips comprises the following steps:

Step 1. The user enters the tire embryo radius, tire shoulder radius, contour correction coefficient, flat width, total width, winding rubber strip parameters, winding head equipment parameters, and winding weight parameters in the software;

Step 2, generate layered profile parameters through the process profile layered algorithm;

Step 3, through the adhesive strip profiling arrangement positioning algorithm, the adhesive strip arrangement data is generated;

The adhesive strip profiling arrangement positioning algorithm uses m points to describe the discrete function f(x)=y1, y2...ym of the profiling contour line, and n points to describe the discrete function g(x)=g1 of all adhesive strip stacking lines , g2....gn, taking the intersection point Q of f(x) and g(x) as the starting point for calculation;

Apply the calculation method of the discrete function of the profile line of the rubber strip section to obtain k discrete functions s(x)=s(x)=s0, s1.... All intersections, get P1, P2...Pz;

In the {Q,Pz} interval, find

When the value S is less than the preset threshold R, determine the position of the glue strip, and finally replace all points of s(x) with g(x), and generate new glue at all points in the interval {g(s0), g(sk)} Discrete function gnew(x) of stacked lines; when the value S is greater than or equal to the preset threshold R, move Q point horizontally by △x distance, and ensure that Q point is located on g(x), obtain a new Q point, and then repeat the above calculation process;

When the x-axis coordinate value of Q exceeds the x-axis coordinate value of point ym, the calculation process is terminated;

When the number of intersection points n is greater than or equal to 2,
When it is larger than the cross-sectional area of the rubber strip, iterate the above calculation process repeatedly to determine the arrangement position of all the rubber strips, otherwise, terminate the calculation process;

When the number of intersection points n is equal to 1, then
When it is larger than the cross-sectional area of the rubber strip, iterate the above calculation process repeatedly to determine the arrangement position of all the rubber strips, otherwise, terminate the calculation process;

When the number of intersection points n=0, it belongs to the user’s process contour input error, otherwise, the calculation process is terminated; Step 4, through the winding head equipment motor cam motion control parameter conversion algorithm, the rubber strip positioning information is converted into motor control parameters, and the tire is calculated. Shoulder rotation and theoretical weight.
According to the calculation method of the discrete function of the cross-section contour line of the rubber strip according to claim 1, it is characterized in that the cross-section of the trapezoidal rubber strip is horizontally divided into m blocks, and finally two triangular areas, several trapezoidal areas and several rectangular areas are obtained. district;

The calculation is derived from one side to the other, and there are two cases of "from left to right" and "from right to left". When calculating from left to right, the leftmost graphic is marked as b0 area, followed by b1, b2, ... bn, the lower left corner of the leftmost graphic area is the key point marked as P0, and the lower right corner point of the rightmost graphic area is the key point marked as Pnx point; when calculating from right to left, the most The graphic on the right is marked as b0 area, followed by b1, b2, ... bn, the lower right corner of the rightmost graphic is the key point marked as P0, and the point at the leftmost lower left corner is the key point marked as Pnx point;

In the calculation process, first set P0 as a point on the discrete function g(x) of the glue strip stacking line, draw a circle with P0 as the center and the length of the lower base of b0 as the radius, and intersect with g(x) to obtain 2 According to the derivation direction, that is, from left to right, select P1 right; from right to left, select P1 left, and record it as P1; then take P1 as the center, repeat the above Calculation process, calculate the key points P3, P4, P5, ...Pn of b2, b3,...bn, and draw a circle with Pn as the center and the length of the lower base of bn as the radius, and intersect with g(x), Obtain two intersection points and record them as Pn left point and Pn right point, and calculate the corresponding Pnx point according to the derivation direction;

Connect the two points P0 and P2, calculate the normal vector E1->P1 that passes through the point P1 to extend to obtain E1->P1new, connect E1->P1new, P1new->P0 and P0->E1 to form a triangle, and change E1- >The modulus of the P1new vector makes the area of the triangle equal to the area of b0, and determines the simulated winding shape of b0 and the new vector E1->P1new;

Connect P1 and P3, calculate the normal vector E2->P2 extending through P2 to obtain E2->P2new, connect P1->P1new, P1->E2, E2->P2new, P1new->P2new to form a quadrilateral , by changing the modulus of the E2->P2new vector to make the area of the quadrilateral equal to the area of b1, determine the simulated winding shape of b1 and the new vector E2->P2new, and so on, determine b2, b3, ... bn-2 The simulated winding shape of .

Connect Pn-1 and Pnx, calculate the normal vector En->Pn extending through the Pn point to obtain En->Pnnew, connect En->Pn, En->Pnx and Pn->Pnx to form a triangle, and connect Pn-1 ->Pn-1new, Pn-1->En, En->Pn, Pn-1new->Pn are connected to form a quadrilateral. By changing the modulus of the En->Pn vector, the sum of the area of the triangle and the area of the quadrilateral is equal to bn and the sum of the areas of bn-1 to finally determine the simulated winding area of bn and bn-1;

All graphic areas form a complete simulation shape of the rubber strip section, and the discrete function s(x)=s0, s1...sk of the upper surface contour line of the rubber strip is obtained by connecting each figure;
A system for realizing the calculation method for automatic arrangement of tire wrapping strips according to any one of claims 1-2, characterized in that the automatic arrangement calculation system for tire wrapping strips comprises:

The human-computer interaction module for inputting calculation parameters is used to manually inject initial parameter values into the system;

The contour parameter subdivision calculation module divides the contour parameters entered by the user into multiple layers according to the specific layering calculation method selected by the user and the entered winding rubber strip parameters, and generates the contour parameters of each layer;

The rubber strip automatic arrangement calculation module calculates the winding head cam trajectory and the rubber strip simulation contour, and generates the winding head cam trajectory based on the contour center coordinate system;

The winding head control parameter calculation module calculates and obtains the three-axis winding head motor cam control parameters according to the winding head cam trajectory, equipment parameters, tire embryo radius, tire shoulder radius, flat width, etc., and generates a motor whose reference frame is the mechanical winding head Cam control parameters.
According to claim 3, the calculation system for automatically arranging tire winding rubber strips is characterized in that the human-computer interaction module for inputting calculation parameters is also provided with a display interface for displaying total width, embryo radius, contour parameters, The input interface of the top width, bottom width and thickness of the winding rubber strip, as well as the rotation radius, X axis and Y axis of the winding head equipment parameters.
A computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the method for calculating the automatic arrangement of tire winding strips according to any one of claims 1-2.
A computer program product stored on a computer-readable medium, characterized in that it includes a computer-readable program, and when executed on an electronic device, a user input interface is provided to implement the tire according to any one of claims 1-4. Calculation method for automatic arrangement of winding rubber strips.
A computer device, characterized in that the computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following steps:

Step 1. The user enters the tire embryo radius, tire shoulder radius, contour correction coefficient, flat width, total width, winding rubber strip parameters, winding head equipment parameters, and winding weight parameters in the software;

Step 2, generate layered profile parameters through the process profile layered algorithm;

Step 3, through the adhesive strip profiling arrangement positioning algorithm, the adhesive strip arrangement data is generated;

Step 4: Through the conversion algorithm of motor cam motion control parameters of the winding head equipment, the rubber strip positioning information is converted into motor control parameters, and the tire shoulder angle and theoretical weight are calculated.
An information and data processing terminal, characterized in that the information and data processing terminal includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the The calculation method for the automatic arrangement of tire winding rubber strips described in any one of requirements 1-2.