Method for measuring angle and density of tire steel cord

Abstract

The application provides a tire steel cord angle and density measuring device and belongs to the technical field of tire production. The application comprises the following steps: cutting a tire and peeling a tread; layering a belt, measuring the width of each layer of the belt, and equally dividing each layer of the belt into five positioning points; measuring the steel cord angle and density of the five positioning points of each layer of the belt; peeling a cross-section tire body part, dividing the tire body into eight positioning points, and dividing a toe port into three positioning points; and measuring the steel cord angle and density of the positioning points of the tire body and the positioning points of the toe port. The application sets multiple positioning points at the positions of the belt, the tire body and the toe port, and measures the steel cord angle and density at the positioning points, so that the steel cord angle and density changes at different positions of the tire can be measured, the changes of the steel cord angle and density in the tire are easily known, and the product design of the researchers is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of tire manufacturing technology, and in particular relates to a method for measuring the angle and density of tire steel cords. Background Technology

[0002] During the tire design and mass production stages, each tire company samples and analyzes each batch of tires produced. Cross-sectional analysis involves analyzing the dimensions of the tire's internal skeleton material, rubber compound dimensions, and component distribution to verify whether the design matches the actual production.

[0003] Conventional tire analysis only measures the angle of the steel cord at a single point in the tire belt layer, carcass, or steel wire bead. It does not measure the angle and density of the steel cord at different locations in the tire, and therefore cannot understand the changes in the angle and density of the steel cord within the tire, nor can it provide a direct understanding of the distribution and variation patterns of the steel cord within the tire. Summary of the Invention

[0004] To address the deficiencies or shortcomings in existing technologies, this invention provides a method for measuring the angle and density of tire steel cords. This method can measure the angle and density of steel cords at different locations in the tire, facilitating an understanding of the changes in the angle and density of tire steel cords within the tire. It provides an intuitive understanding of the distribution and variation patterns of steel cords within the tire, which is beneficial for R&D personnel in product design.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An embodiment of the present invention provides a method for measuring the angle and density of tire steel cord, comprising the following steps:

[0007] Step 1: Cut and peel off the tire tread to expose the belt layer;

[0008] Step 2: Divide the belt layer into layers, measure the width of each belt layer, and divide each belt layer into multiple measurement positioning points. Measure the angle and density of the steel wire cord at each measurement positioning point on each belt layer.

[0009] Step 3: Cut and peel off the tire sidewall to expose the tire carcass and bead protective layer;

[0010] Step 4: Divide the carcass layer and the bead protection layer into multiple measurement positioning points, and measure the angle and density of the steel cord at the measurement positioning points on the carcass layer and the bead protection layer.

[0011] Step 5: Plot the measured tire steel cord angle and density data into a chart to obtain the variation patterns of steel cord angle and density at the belt layer, carcass, and bead position.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] This invention sets multiple positioning points at the belt layer, carcass, and bead position, and measures the angle and density of the steel cord at these points. This allows for the measurement of the changes in the angle and density of the steel cord at different locations within the tire, facilitating an understanding of these variations. The results are then presented in graphical form, providing a more intuitive understanding of the distribution and variation patterns of the steel cord within the tire, and offering data support for future product design. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the belt layer positioning points in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the measurement and positioning points of the carcass layer and the toe protection layer in an embodiment of the present invention;

[0016] Figure 3 This is a diagram showing the change in the angle of the steel wire cord at different measurement positioning points in the belt layer according to an embodiment of the present invention;

[0017] Figure 4 This is a graph showing the variation of steel wire cord density at different measurement positioning points in the belt layer according to an embodiment of the present invention;

[0018] Figure 5 This is a diagram showing the change in the angle of the steel cord at different measurement and positioning points in the tire carcass layer in an embodiment of the present invention.

[0019] Figure 6 This is a graph showing the variation of steel cord density at different measurement and positioning points in the tire carcass layer in an embodiment of the present invention.

[0020] Figure 7 This is a diagram showing the angle variation of the steel wire cord at different measurement positioning points of the toe opening protective layer in an embodiment of the present invention;

[0021] Figure 8 This is a graph showing the variation of steel wire cord density at different measurement positioning points of the toe opening protective layer in an embodiment of the present invention; Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] A typical embodiment of the present invention, such as Figure 1 As shown, a method for measuring the angle and density of tire steel cord includes the following steps:

[0024] Step 1: Cut and peel off the tire tread to expose the belt layer.

[0025] Cut a tread block segment at an angle of 30°-60° on the tire tread, ensuring that the cut surface is perpendicular to the tire circumference.

[0026] Grind the cross-section to confirm that the cut surface is perpendicular and flat;

[0027] Step 2: Divide the belt layer into layers, measure the width of each belt layer, and divide each belt layer into multiple measurement positioning points. Measure the angle and density of the steel wire cord at each measurement positioning point on each belt layer.

[0028] like Figure 1 As shown, the belt layer is divided into four layers, and the width of each belt layer is different.

[0029] Since the belt layer is divided into multiple layers, the belt layer is divided into layers before measurement to facilitate the measurement of the steel wire cords on the belt layer and to help understand the distribution of steel wire cords in each belt layer.

[0030] The third belt layer positioning point is located at the center of the belt layer end face. The first and fifth belt layer positioning points are located 10 mm away from the edge of the belt layer. The second belt layer positioning point is located between the first and third belt layer positioning points. The fourth belt layer positioning point is located between the third and fifth belt layer positioning points.

[0031] Use a protractor to measure angles. When measuring, adjust the main scale to coincide with the center line of the cross section and the vernier scale to completely coincide with the steel cord. Record the data. The measurement must be performed on the cross section. The cross section should be fixed and placed horizontally during the measurement. The next layer of the belt can be measured after the upper layer is measured.

[0032] Use a vernier caliper to measure density. Draw a 10cm sampling line during the measurement. The sampling line must be perpendicular to the steel wire being measured. Take the outer edge of the steel wire as the starting point and count the number of steel wires.

[0033] By setting multiple measurement and positioning points on each belt layer and measuring the angle and density of the steel cord at each measurement and positioning point, the variation law of the angle and density of each belt layer can be clearly understood, and the distribution of steel cord at different positions of the entire belt layer can be clearly understood, which facilitates subsequent product design.

[0034] Step 3: Cut and peel off the tire sidewall to expose the tire body layer and the bead protection layer.

[0035] Step 4: Divide the carcass layer and the bead protection layer into multiple measurement positioning points, and measure the angle and density of the steel cord at the measurement positioning points on the carcass layer and the bead protection layer.

[0036] By dividing both the carcass and the bead protection layer into multiple measurement and positioning points, and measuring the angle and density of the steel cord at each measurement and positioning point, the variation law of the angle and density of the steel cord on the carcass and the bead protection layer can be obtained. This allows for a clear understanding of the distribution of steel cords in various parts of the carcass and the bead protection layer, facilitating subsequent product design.

[0037] like Figure 2 As shown, the steel cords at the carcass layer and the bead protection layer are positioned. There are five positioning points for the carcass layer and three positioning points for the bead protection layer. The first positioning point for the carcass layer is located at the center of the end face; the fourth positioning point for the carcass layer is located at the midpoint of the sidewall; the second and third positioning points for the carcass layer are located at the trisection points of the first and fourth positioning points; the sixth positioning point for the carcass layer is located at the inner end of the bead protection layer; the fifth positioning point for the carcass layer is located at the midpoint between the fourth and sixth positioning points; the seventh positioning point for the carcass layer is located at the center of the lower edge of the rim; and the eighth positioning point for the carcass layer is located at the inner end of the bead protection layer.

[0038] The first toe opening layer positioning point is located at the inner reverse end point of the wire toe opening, the second toe opening layer positioning point is located at the center point of the lower edge of the steel ring, and the third toe opening layer positioning point is located at the outer reverse end point of the wire toe opening.

[0039] Use a protractor to measure the angle. When measuring, adjust the main scale to coincide with the center line of the cross-section, and the vernier scale to completely coincide with the steel cord.

[0040] Use a vernier caliper to measure density. Draw a 10cm sampling line during the measurement. The sampling line must be perpendicular to the steel wire being measured. Take the outer edge of the steel wire as the starting point and count the number of steel wires.

[0041] Step 5: Create a graph showing the measured tire steel cord angles and densities to obtain the variation patterns of steel cord angles and densities at the belt layer, carcass, and bead position, such as... Figure 3-8 As shown, this allows for a more intuitive understanding of the distribution and variation patterns of the steel cords inside the tire, providing data support for future product design.

[0042] This invention sets multiple measurement and positioning points at the belt layer, tire carcass, and bead position, and measures the angle and density of the steel cord at these points. This allows for the measurement of the changes in the angle and density of the steel cord at different locations within the tire, facilitating an understanding of these variations. The results are then presented in graphical form, providing a more intuitive understanding of the distribution and variation patterns of the steel cord within the tire, and offering data support for future product design.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for measuring the angle and density of tire steel cord, characterized in that, Includes the following steps: Step 1: Cut and peel off the tire tread to expose the belt layer; Step 2: Divide the belt layer into layers, measure the width of each belt layer, and divide each belt layer into multiple measurement positioning points. Measure the angle and density of the steel wire cord at each measurement positioning point on each belt layer. Step 3: Cut and peel off the tire sidewall to expose the tire carcass and bead protective layer; Step 4: Divide the carcass layer and bead protection layer into multiple measurement positioning points, and measure the angle and density of the steel cord at the measurement positioning points on the carcass layer and bead protection layer; Step 5: Plot the measured tire steel cord angle and density data into a chart to obtain the variation patterns of steel cord angle and density at the belt layer, carcass, and bead position; In step 2, each belt layer is divided into multiple measurement positioning points. Specifically, each belt layer is divided into five measurement positioning points. The first belt layer positioning point is located at the center of the end face of the belt layer. The second and third belt layer positioning points are located at a set distance from the edge of the belt layer. The fourth belt layer positioning point is located between the first and second belt layer positioning points. The fifth belt layer positioning point is located between the first and third belt layer positioning points. In step 4, the tire carcass is divided into multiple measurement and positioning points. Specifically, the tire carcass is divided into eight measurement and positioning points. The first tire carcass positioning point is located at the center of the end face, the fourth tire carcass positioning point is located at the midpoint of the tire sidewall, the second and third tire carcass positioning points are located at the trisection points of the first and fourth tire carcass positioning points, the sixth tire carcass positioning point is located at the inner end of the steel wire bead, the fifth tire carcass positioning point is located at the midpoint of the fourth and sixth tire carcass positioning points, the seventh tire carcass positioning point is located at the center point of the lower edge of the steel ring, and the eighth tire carcass positioning point is located at the inner end of the tire carcass bead. In step 4, the toe opening protective layer is divided into multiple measurement positioning points. Specifically, the toe opening protective layer is divided into three measurement positioning points. The first toe opening layer positioning point is located at the inner reverse end of the wire toe opening, the second toe opening layer positioning point is located at the center point of the lower edge of the steel ring, and the third toe opening layer positioning point is located at the outer reverse end of the wire toe opening.

2. The method for measuring the angle and density of tire steel cord as described in claim 1, characterized in that, When cutting the tire tread in step 1, cut a tread block segment between the set angles of the tire tread, and ensure that the cut surface is perpendicular to the tire circumference.

3. The method for measuring the angle and density of tire steel cord as described in claim 1, characterized in that, In step 2, when the belt layer is divided into four layers, each with a different width.

4. The method for measuring the angle and density of tire steel cord as described in claim 1, characterized in that, In step 2, the angle of the steel cord at the measurement positioning point on each belt layer is measured. Specifically, a protractor is used to measure the angle. During the measurement, the main scale is adjusted to coincide with the center line of the cross section, and the vernier scale is completely aligned with the steel cord. The data is recorded. The measurement must be performed on the cross section. The cross section is fixed and placed horizontally during the measurement. After measuring the upper belt layer, the next belt layer is measured.

5. The method for measuring the angle and density of tire steel cord as described in claim 1, characterized in that, In step 2, the density of the steel wire cord at the measurement positioning point on each belt layer is measured. Specifically, the density is measured using a vernier caliper. During the measurement, a sampling line of a set length is drawn. The sampling line must be perpendicular to the steel wire being measured. The outer edge of the steel wire is used as the starting point to calculate the number of steel wires.

6. The method for measuring the angle and density of tire steel cord as described in claim 1, characterized in that, In step 4, the angle of the steel cord at the measurement positioning point on the carcass layer and the bead protective layer is measured. Specifically, a protractor is used to measure the angle. During the measurement, the main scale is adjusted to coincide with the center line of the cross section, and the vernier scale is completely aligned with the steel cord.

7. The method for measuring the angle and density of tire steel cord as described in claim 1, characterized in that, In step 5, the density of the steel cord at the measurement positioning point on the carcass layer and the bead protective layer is measured. Specifically, the density is measured using a vernier caliper. During the measurement, a sampling line of a set length is drawn. The sampling line must be perpendicular to the steel cord being measured. The outer edge of the steel cord is used as the starting point to calculate the number of steel cords.

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