Bending method, winding method, bending equipment and winding system

Abstract

The present invention discloses a bending method, comprising: A. generating a tread winding cross-sectional model based on engineering drawing parameters; B. layering the tread winding cross-sectional model to form multiple layered tread winding cross-sectional models; and C. bending each of the multiple layered tread winding cross-sectional models to form layered contours. The bending method bends the multiple layered tread winding cross-sectional models so that the resulting multiple layered contours are consistent with the actual tread outer contour, thereby enabling the engineering drawing to more accurately depict the tread outer contour. The present invention also discloses a winding method, bending equipment, and winding system.

Description

Technical Field

[0001] The present invention relates to the technical field of tire winding technology, and in particular to a bending method, a winding method, a bending device and a winding system. Background Art

[0002] The tire winding process involves wrapping and compacting a rubber strip around the surface of a tire blank to create a tire that meets target specifications. Current challenges with this process include low precision and unevenness in the finished tire. Before winding, the engineering drawings required by the tire process depict the bottom edge as a straight line, while the actual cross-sectional profile of the tire blank is a curved line. Therefore, converting the engineering drawings into ones that accurately depict the tread cross-section will directly improve tire winding quality.

[0003] Therefore, how to enable engineering drawings to accurately describe the outer contour of the tread is a technical problem that those skilled in the art currently need to solve. Summary of the Invention

[0004] In view of this, a first object of the present invention is to provide a bending method so that the engineering drawing can accurately describe the outer contour of the tread;

[0005] A second object of the present invention is to provide a winding method;

[0006] A third object of the present invention is to provide a bending device;

[0007] A fourth object of the present invention is to provide a winding system.

[0008] In order to achieve the above first object, the present invention provides the following technical solutions:

[0009] A bending method, comprising:

[0010] A. Generate tread winding section model based on engineering drawing parameters;

[0011] B. performing layered processing on the tread winding cross-section model to form multiple layered tread winding cross-section models;

[0012] C. Bend the multiple layered tread winding cross-section models separately to form a layered profile.

[0013] Optionally, in the above-mentioned bending method, step B includes performing layering processing on the tread winding cross-section model using an interpolation function y(x).

[0014] Optionally, in the above bending method, between step B and step C, the following steps are further included:

[0015] Obtain the key point coordinates of the tread winding section model and the true bottom edge coordinates of the tire embryo cross section;

[0016] The real bottom edge coordinates include: coordinate axis origin o, a (x a ,y a ),b(x b ,y b ), Δx=x b -x a ;

[0017] The key point coordinates include o, a1, b1.

[0018] Optionally, in the above-mentioned bending method, bending the plurality of layered tread winding cross-sectional models separately includes:

[0019] According to the formula and y(x), when Δx=L=oc, determine the coordinates of any point c1 on the true bottom edge, where the coordinates of point c1 are (x c' ,y c' ).

[0020] Optionally, in the above-mentioned bending method, bending the plurality of layered tread winding cross-sectional models separately includes:

[0021] Calculate the slope k of the tangent line on y(x) passing through point c1;

[0022] Let the position of point b after bending be b1(x b' ,y b' );

[0023] Draw a perpendicular line b1c1 perpendicular to the tangent line of y(x) through point c1, and make the distance between points b1 and c1 be d b1c1 =y b , we can get x b' =x c1' +y b sinθ,y b' =y c1' +y b cosθ;

[0024] Let the line b1c1 and the line y b The angle between them is θ;

[0025] Calculate the value of θ based on the slope k and the formula θ = arctan(k);

[0026] The coordinates of all points on the straight line where a and b are located are converted into the coordinates of the bent points to form a layered contour function.

[0027] Optionally, in the above bending method, the bending method further comprises:

[0028] The cross-sectional area method was used to adjust the layered contour function.

[0029] Optionally, in the above-mentioned bending method, the cross-sectional area method includes:

[0030] The initial area is S1 = (l1 + l2) × h ÷ 2;

[0031] Assume the true bottom edge y1(x), the layered contour function y2(x), x∈[x1,x2], the differential of x is 1000 parts,

[0032] The area after bending is

[0033]

[0034] Δs=S1-S2;

[0035] Set the error value to err. If -err≤Δs≤err, the outer contour function y2(x) is determined to meet the requirements. Otherwise, adjust the data until Δs meets the requirements.

[0036] The bending method provided by the present invention bends multiple layered tread winding section models so that the multiple layered contours formed are consistent with the actual tread outer contour, thereby enabling the engineering drawing to more accurately describe the tread outer contour.

[0037] In order to achieve the above second purpose, the present invention provides the following technical solutions:

[0038] A winding method, the winding method including any of the above bending methods; the winding method also includes:

[0039] The tread is wound sequentially according to multiple layered profile functions.

[0040] In order to achieve the third object above, the present invention provides the following technical solutions:

[0041] A bending device comprises a device for performing any of the above-mentioned bending methods.

[0042] In order to achieve the fourth objective, the present invention provides the following technical solutions:

[0043] A winding system comprises any one of the bending devices described above.

[0044] The winding method, bending equipment and winding system provided by the present invention have all the technical effects of the above-mentioned bending method due to the above-mentioned bending method, and will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0046] Figure 1 This is an overall structural diagram of the bending method disclosed in an embodiment of the present invention;

[0047] Figure 2 This is a structural diagram before bending disclosed in an embodiment of the present invention;

[0048] Figure 3 This is a structural diagram after bending disclosed in an embodiment of the present invention;

[0049] Figure 4 The embodiment disclosed in the present invention Figure 3 A partial enlarged view of . DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any novel efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," and "bottom" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the positions or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] like Figure 1 As shown, the bending method disclosed in the present invention includes:

[0053] A. Generate tread winding section model based on engineering drawing parameters;

[0054] It should be noted that

[0055] B. performing layered processing on the tread winding cross-section model to form multiple layered tread winding cross-section models;

[0056] C. Bend the multiple layered tread winding cross-section models separately to form a layered profile.

[0057] The bending method provided by the present invention bends multiple layered tread winding section models so that the multiple layered contours formed are consistent with the actual tread outer contour, thereby enabling the engineering drawing to more accurately describe the tread outer contour.

[0058] In order to optimize the above technical solution, step B includes using the interpolation function y(x) to perform layered processing on the tread winding cross-section model. Specifically, the layered processing on the tread winding cross-section model includes but is not limited to methods such as using the interpolation function y(x). Other layering methods are also within the scope of protection of the present invention and will not be described in detail here. When in use, the tread winding cross-section model is layered, and each layer forms a corresponding y(x), that is, multiple layered tread winding cross-section models are formed, and then the multiple layered tread winding cross-section models are bent to form layered contours, so that the multiple layered contours formed can more accurately describe the outer contour of the tread.

[0059] In order to optimize the above technical solution, the following steps are further included between step B and step C:

[0060] Obtain the key point coordinates of the tread winding section model and the true bottom edge coordinates of the tire embryo cross section;

[0061] The real bottom edge coordinates include: coordinate axis origin o, a (x a ,y a ),b(x b ,y b ), Δx=x b -x a ;

[0062] The key point coordinates include o, a1, b1.

[0063] like Figure 2 As shown, h is the thickness of the tread to be wound, D is the width of the tread to be wound, and the point located at the upper base of the trapezoid together with a and b is the key point of tire winding.

[0064] In order to optimize the above technical solution, the bending processing of multiple layered tread winding section models includes:

[0065] According to the formula and y(x), in When the coordinates of any point c1 on the real bottom edge are determined, the coordinates of point c1 are (x c' ,y c' ).

[0066] In order to optimize the above technical solution, the bending processing of multiple layered tread winding section models includes:

[0067] Calculate the slope k of the tangent line on y(x) passing through point c1;

[0068] Let the position of point b after bending be b1(x b' ,y b' );

[0069] Draw a perpendicular line b1c1 perpendicular to the tangent line of y(x) through point c1, and make the distance between points b1 and c1 be d b1c1 =y b , we can get x b' =x c1' +y b sinθ,y b' =y c1' +y b cosθ;

[0070] Let the line b1c1 and the line y b The angle between them is θ;

[0071] Calculate the value of θ based on the slope k and the formula θ = arctan(k);

[0072] The coordinates of all points on the straight line where a and b are located are converted into the coordinates of the bent points to form a layered contour function.

[0073] It should be noted that all points are the key points mentioned above, and all points converted into bent points are also key points.

[0074] Furthermore, the calculation steps for the slope k of the tangent line on y(x) passing through point c1 are:

[0075] Let Δx = 0.01, xl = x c1' -Δx, xr=x c1' +Δx, yl=y(xl), yr=y(xr);

[0076] k=(xl-xr) / (yl-yr).

[0077] like Figure 3 As shown, Figure 3 This is a schematic diagram of the layered tread winding cross-section model after bending, where the lower arc is the true bottom edge and the upper arc is Figure 2 The arc formed by bending all the key points of the upper base of the middle trapezoid is connected by the key points. This arc is the above-mentioned layered contour function.

[0078] like Figure 4 As shown, Figure 4 for Figure 3 A local enlarged diagram is used to understand the above calculation process.

[0079] In order to optimize the above technical solution, the above bending method also includes:

[0080] The cross-sectional area method was used to adjust the layered contour function.

[0081] In order to optimize the above technical solution, the cross-sectional area method includes:

[0082] The initial area is S1 = (l1 + l2) × h ÷ 2;

[0083] Assume the true bottom edge y1(x), the layered contour function y2(x), x∈[x1,x2], the differential of x is 1000 parts,

[0084] The area after bending is

[0085]

[0086] Δs=S1-S2;

[0087] Set the error value to err. If -err≤Δs≤err, the outer contour function y2(x) is determined to meet the requirements. Otherwise, adjust the data until Δs meets the requirements.

[0088] It should be noted that after adjusting the layered profile function through the cross-sectional area method, the bending effect can be guaranteed to be consistent with the actual situation, thereby improving the subsequent tire winding quality.

[0089] The winding method disclosed in the present invention includes any of the above-mentioned bending methods; the winding method further includes:

[0090] The tread is wound sequentially according to multiple layered profile functions.

[0091] Furthermore, the embryo is rubber-wrapped according to a plurality of layered contour functions.

[0092] The bending device disclosed in the present invention includes a bending method for performing any one of the above

[0093] The winding system disclosed in the present invention includes any one of the bending devices described above.

[0094] The advantages of the present invention are:

[0095] (1) It enables engineering drawings to more accurately describe the outer contour of the tread;

[0096] (2) Highly practical.

[0097] It should be noted that the bending method, winding method, bending equipment, and winding system provided by the present invention can be used in the field of tire winding technology or other fields. "Other fields" refer to any field other than the field of tire winding technology. The above description is merely illustrative and does not limit the application areas of the bending method, winding method, bending equipment, and winding system provided by the present invention.

[0098] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0099] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0100] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0101] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bending method, characterized in that: include: A. Generate tread winding section model based on engineering drawing parameters; B. performing layered processing on the tread winding cross-section model to form multiple layered tread winding cross-section models; C. bending the multiple layered tread winding cross-section models to form layered contours; The step B includes using an interpolation function performing layering processing on the tread winding cross-section model; Also included between step B and step C: Obtain the key point coordinates of the tread winding section model and the true bottom edge coordinates of the tire embryo cross section; The real bottom edge coordinates include: coordinate axis origin o, a ,b , ; The key point coordinates include ; The bending processing of the plurality of layered tread winding section models comprises: According to the formula and ,exist , determine the coordinates of any point c1 on the true bottom edge, where the coordinates of point c1 are ; The bending processing of the plurality of layered tread winding section models comprises: Calculate The slope k of the tangent line passing through point c1; Let the position of point b after bending be b1 ; Make a vertical line Perpendicular to The tangent line passes through point c1, and the distance between points b1 and c1 is , we can get , ; Set a straight line With straight line The angle between them is θ; According to the slope k and the formula , calculate the value of θ; The coordinates of all points on the straight line where a and b are located are converted into the coordinates of the bent points to form a layered contour function.

2. The bending method according to claim 1, wherein: The bending method further comprises: The layered profile function is adjusted using a cross-sectional area method.

3. The bending method according to claim 2, wherein: The cross-sectional area method includes: The initial area is ; Set the real bottom edge , the hierarchical profile function , , The differential is 1000 parts, The area after bending is: ； ； Set the error value to ,like , then determine the outer contour function Meet the requirements, otherwise adjust the data until Meets the requirements.

4. A winding method, characterized in that: The winding method includes the bending method according to any one of claims 1 to 3; The winding method further comprises: The tread is wound sequentially according to a plurality of the layered profile functions.

5. A bending device, characterized in that: The method comprises performing the bending method described in any one of 1 to 3.

6. A winding system, characterized in that: Comprising the bending device as described in claim 5.

Images