A method for detecting the hardness of a brake disc part

Abstract

The application relates to the technical field of detection of the hardness of brake disc parts, and discloses a detection method for the hardness of brake disc parts. First, the brake disc is fixed on a support to ensure that it remains stable during rotation, heating and hardness testing. One side of the brake disc is arbitrarily selected as the heating side, and a friction module is arranged to generate heat through friction to simulate the temperature environment under actual working conditions. The other side is used as the hardness testing side, and a brake module is arranged to stop the rotation of the brake disc under the condition of applying a vertical force. Subsequently, the hardness testing side is comprehensively detected by adopting a rotating line strategy to ensure that the hardness distribution of the entire brake disc surface is covered. The design not only guarantees the independence of heating and hardness testing, but also improves the accuracy of testing and the comprehensiveness of data, maximizes the working efficiency of the equipment, and reduces the error and time cost in the detection process.

Description

Technical Field

[0001] The present invention relates to the technical field of detection of the hardness of brake disc parts, in particular to a method for detecting the hardness of brake disc parts. Background Art

[0002] Brake discs are key components in automotive braking systems, and their performance is directly related to vehicle safety and stability. Brake disc hardness significantly impacts their service life, braking performance, and wear resistance. Discs with insufficient hardness can suffer from premature wear and cracking during use, compromising braking performance and vehicle safety. Therefore, ensuring that brake disc hardness meets standards is crucial.

[0003] At present, the detection methods of brake disc hardness mainly include traditional hardness tester and online detection. Traditional hardness tester generally uses a hardness tester to perform point hardness test on the surface of the brake disc to obtain the hardness distribution of the brake disc surface. Traditional hardness testers can only perform hardness test on partial areas of the brake disc, and it is difficult to fully reflect the hardness distribution of the entire brake disc. Traditional hardness test requires manual operation to place the hardness tester one by one at the test point. This method is not only time-consuming and labor-intensive, but also has low test efficiency. Therefore, in response to the shortcomings of the existing technology, the present invention proposes a method for detecting the hardness of brake disc parts. By combining strategies such as frictional heat generation and laser detection, it can not only better simulate the working state of the brake disc under actual working conditions, but also conduct comprehensive and accurate detection of its hardness without damaging the brake disc. It has important technical significance and application value. Summary of the Invention

[0004] The present invention provides a method for detecting the hardness of a brake disc component, which helps solve the problems mentioned in the above background technology.

[0005] The present invention provides the following technical solution: a method for detecting the hardness of a brake disc part, comprising:

[0006] Set the brake disc on the bracket;

[0007] Randomly select one surface of the brake disc as the heating surface;

[0008] Select another surface as the hardness test surface;

[0009] A friction module is provided on the heating surface;

[0010] The friction module is a metal block that comes into close contact with the brake disc when the brake disc rotates, generating heat using the principle of frictional heat generation;

[0011] A braking module is set on the hardness test surface;

[0012] The braking module is configured to apply force to the braking module to stop the rotating brake disc, wherein the direction of the force applied to the braking module is perpendicular to the hardness test surface of the brake disc;

[0013] The hardness of the brake disc is tested using a rotating line strategy on the brake disc hardness test surface.

[0014] Optionally, the method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes:

[0015] The circular surface where the hardness test surface is located is recorded as the test circular surface;

[0016] Get the center of the test circle;

[0017] Divide the circumference of the test circle into N equal parts;

[0018] Get all the segmentation points on the circumference, select any segmentation point as the first segmentation point, and sort and mark the segmentation points on the circumference in clockwise order;

[0019] Taking the center of the circle as the starting point and each segmentation point as the end point, the center of the circle and each segmentation point are connected respectively, and the formed line segment is recorded as a test line segment.

[0020] Optionally, the method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes:

[0021] Set M test temperatures and arrange them in order from low to high, recording them as the first test temperature, the second test temperature, ... the Mth test temperature;

[0022] Obtain the number of revolutions of the brake disc when the brake disc temperature rises to each test temperature;

[0023] If the number of revolutions of the brake disc is a decimal, the number of revolutions of the brake disc is rounded up to an integer;

[0024] The rounding up is to obtain the decimal value of the brake disc revolutions, and the rounding down of the brake disc revolutions = the brake disc revolutions - the decimal value of the brake disc revolutions + 1;

[0025] The number of revolutions of the brake disc after treatment is recorded as the number of revolutions of the brake disc test;

[0026] Each test temperature and the corresponding brake disc test revolution number are respectively composed of a temperature revolution group.

[0027] Optionally, the method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes:

[0028] Get the center point of the brake module and draw a perpendicular line through the center point of the brake module to the brake disc hardness test surface;

[0029] The point where the vertical line intersects the brake disc is recorded as the initial point;

[0030] Rotate the brake disc and place the friction module in close contact with the brake disc, wherein no gap is formed between the brake disc and the friction module;

[0031] Control the brake disc to rotate clockwise;

[0032] When the temperature of the brake disc rises to the first test temperature, obtaining the current number of revolutions of the brake disc;

[0033] If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer, and start the brake module;

[0034] If the number of revolutions of the brake disc is an integer, the brake module is activated;

[0035] When the brake disc stops rotating, the position of the brake module on the brake disc is obtained;

[0036] From the stopping position of the brake module to the initial point counterclockwise, obtain the length of the brake module on the test circumference, and obtain the test line segment that the brake module passes through when it stops;

[0037] Calculate the ratio of the length of the brake module on the test circumference to the length of the test circumference. The ratio = the length of the brake module on the test circumference / 2πR, where R is the length of the test line segment. The ratio is recorded as the brake disc braking area.

[0038] Use a laser detection strategy to detect whether the test line segment that the brake module passes through when it stops is deformed;

[0039] If deformation occurs, the brake disc fails the hardness test at the first test temperature;

[0040] If no deformation occurs, continue testing using the brake module brake point dislocation strategy;

[0041] The braking point of the brake module is specifically the first point where the brake module contacts the brake disc when force is applied to the brake module.

[0042] Optionally, the laser detection strategy is used to detect whether a test line segment passed by the brake module when it stops is deformed, specifically including:

[0043] S1. Select any test line segment that the brake module passes through when it stops as the detection line segment;

[0044] S2. Get the two endpoints of the detection line segment;

[0045] S3, using laser to irradiate from one end point to another;

[0046] S4, obtaining the optical path of laser irradiation;

[0047] S5. Select Q detection points on the laser irradiation path;

[0048] S6, sequentially draw vertical line segments perpendicular to the laser irradiation light path from the detection point on the laser irradiation light path to the detection line segment;

[0049] S7. Obtain the length of each vertical segment. If the lengths of the vertical segments are all 0, the detection segment is not deformed. If the lengths of any vertical segment are greater than 0, the detection segment is deformed.

[0050] Repeat steps S1 to S7 to sequentially detect whether the test line segments passed by the brake module when it stops are deformed.

[0051] Optionally, the step of continuing the test by adopting a braking module braking point staggering strategy specifically includes:

[0052] Get the braking area of ​​the brake disc during the last test;

[0053] Get the number of revolutions when the brake disc temperature rises to the test temperature during the current test;

[0054] If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer;

[0055] If the number of revolutions of the brake disc is an integer;

[0056] Continue to rotate the brake disc, and when the area where the brake disc rotates exceeds the braking area of ​​the brake disc, activate the brake module;

[0057] When the brake disc stops rotating, the position of the brake module on the brake disc is obtained;

[0058] Obtain the area that the brake module passes through on the brake disc and record it as the current braking area;

[0059] If the current braking area does not overlap with the braking area of ​​the brake disc during the previous test, proceed to the next temperature test;

[0060] If the current braking area overlaps with the brake disc braking area during the previous test, replace the brake disc and retest.

[0061] Optionally, the replacing of the brake disc and retesting the brake disc may include:

[0062] Get the test temperature when retesting is required;

[0063] Get the center point of the brake module and draw a perpendicular line through the center point of the brake module to the brake disc hardness test surface;

[0064] The point where the vertical line intersects the brake disc is recorded as the initial point;

[0065] Turn the brake disc and press the friction module against the brake disc;

[0066] Control the brake disc to rotate clockwise;

[0067] When the temperature of the brake disc rises to a test temperature at which retesting is required, the current number of revolutions of the brake disc is obtained;

[0068] If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer, and activate the brake module;

[0069] If the number of revolutions of the brake disc is an integer, the brake module is activated;

[0070] When the brake disc stops rotating, the position of the brake module on the brake disc is obtained;

[0071] From the stopping position of the brake module to the initial point counterclockwise, obtain the length of the brake module on the test circumference, and obtain the test line segment that the brake module passes through when it stops;

[0072] Calculate the ratio of the length of the brake module on the test circumference to the length of the test circumference. The ratio = the length of the brake module on the test circumference / 2πR, where R is the length of the test line segment. The ratio is recorded as the brake disc braking area.

[0073] Use a laser strategy to detect whether the test line segment that the brake module passes through when it stops is deformed;

[0074] If deformation occurs, the brake disc fails the hardness test at the test temperature and needs to be retested;

[0075] If no deformation occurs, continue testing using the brake module brake point dislocation strategy;

[0076] The braking point of the brake module is specifically the first point where the brake module contacts the brake disc when force is applied to the brake module.

[0077] The invention has the following beneficial effects:

[0078] 1. The brake disc is set on the bracket to ensure the stability and safety of the brake disc during the testing process. The bracket provides a fixed platform to keep the brake disc stationary during operations such as rotation, heating, and hardness testing, avoiding errors caused by vibration or position offset. Any surface of the brake disc can be selected as the heating surface to flexibly adapt to different testing requirements and maximize the working efficiency of the equipment. This choice provides flexibility for the heating process and can be tested without specific conditions, thereby simplifying the operating steps and reducing time costs. The other surface is selected as the hardness test surface to ensure the independence of the heating surface and the hardness test surface functions. This division of labor prevents heating and hardness testing from interfering with each other, thereby improving the accuracy of the test. A friction module is set on the heating surface to simulate the temperature state of the brake disc under actual working conditions by generating heat through friction. The advantage of this design is that it more realistically reproduces the operation of the brake disc at high temperature, providing more accurate conditions for subsequent hardness testing. By generating heat through friction, It can effectively control and reproduce specific temperature conditions, ensuring that the hardness test is carried out in an environment closer to the actual use conditions, enhancing the practical applicability and credibility of the test results. A brake module is set on the hardness test surface to ensure that the rotation of the brake disc can be accurately stopped under specified conditions. This design ensures that the brake disc stops at a specific position and provides a stable hardness test benchmark. The direction of applied force is perpendicular to the hardness test surface of the brake disc, ensuring that the force transmission direction is orthogonal to the test surface, thereby maximizing the effective transmission of force. The advantage of this design is that it can avoid lateral forces caused by angular deviation of the force, thereby preventing the brake disc from offsetting or tilting. Vertical force application not only improves the accuracy of brake module control, but also enhances the accuracy of hardness test results. The use of a rotating line strategy for hardness testing on the hardness test surface can fully cover the hardness distribution of the brake disc surface. This method avoids important areas that may be missed by point detection through linear scanning, thereby providing more comprehensive and detailed hardness data.

[0079] 2. The circular surface where the hardness test surface is located is recorded as the test circular surface, which helps to clarify the scope of the test area and ensure the accuracy and systematicness of the test process. Taking the center of the circle as the reference, the rotation line strategy can be effectively planned and executed to ensure the uniformity and consistency of each test segment. Dividing the circumference of the test circular surface into N equal parts can ensure the comprehensiveness and uniformity of the hardness test. Any split point can be selected as the first split point to flexibly adjust the test starting point and simplify the preparation work of the test process. The split points are sorted and marked in a clockwise order on the circumference to ensure the orderly progress of the test and the logic of the data. The clockwise marking method allows subsequent hardness test operations to be performed in sequence, reducing the possibility of confusion and misoperation. Starting from the center of the circle and ending at each split point, the test segment can be accurately constructed to ensure full coverage of the test area. By marking each test segment, the test data can be accurately matched with its corresponding test position, facilitating subsequent data processing and analysis.

[0080] 3. Setting M test temperatures and arranging them in ascending order helps systematically evaluate the hardness performance of the brake disc under different temperature conditions. By setting multiple test temperatures, the hardness variation trend of the brake disc material under different thermal conditions can be obtained. This strategy helps to identify potential weaknesses or performance degradation of the material at specific temperatures, providing an important reference for brake disc design and improvement. Obtaining the number of brake disc revolutions when the brake disc temperature rises to each test temperature helps to accurately record the dynamic performance of the brake disc under different temperatures. If the brake disc revolutions are decimal, the brake disc revolutions are rounded up. This strategy ensures more concise and unified data processing during the hardness test. By rounding up the decimal revolutions, the computational complexity during the test can be avoided and the data analysis steps can be simplified. Each test temperature and the corresponding brake disc test revolutions are respectively organized into a temperature rotation array, which can intuitively reflect the relationship between temperature and revolutions. This structured data organization method facilitates the analysis of the hardness performance of the brake disc under different temperature conditions. The temperature rotation array can effectively identify abnormalities or trend changes in the brake disc revolutions at specific temperatures.

[0081] 4. By obtaining the center point of the brake module and drawing a vertical line perpendicular to the brake disc hardness test surface, the contact position between the brake module and the brake disc can be accurately determined. The point where the vertical line intersects the brake disc is recorded as the initial point, which can provide a clear starting point reference for subsequent test operations, ensuring that the friction module and the brake disc are in close contact without any gap, and can ensure the uniform generation and conduction of friction heat. This operation helps to simulate real braking conditions and ensure the consistency of the temperature distribution of the brake disc throughout the test process. Through close contact, heat loss or uneven heating caused by poor contact can be effectively avoided, thereby ensuring the accuracy and reliability of the hardness test. Controlling the brake disc to rotate clockwise helps to standardize the rotation direction during the test and ensure that the conditions of each test are consistent. The position of the brake module is obtained when the brake disc stops rotating. The positioning can provide an accurate reference for subsequent hardness testing and deformation detection. By obtaining the length from the stopping position of the brake module to the initial point in the counterclockwise direction, the movement path of the brake module on the test circumference can be accurately calculated, and the proportion of the length passed by the brake module on the test circumference can be calculated, which helps to accurately quantify the distribution of the braking area on the test circumference. The laser detection strategy is used to detect whether the test line segment passed by the brake module when it stops is deformed, which helps to accurately evaluate the physical changes of the brake disc during the test. By detecting the deformation, it is judged that the hardness of the brake disc at the first test temperature is unqualified. If no deformation is detected, the brake module braking point dislocation strategy is adopted to further test to ensure the hardness of the brake disc. The brake module braking point is clearly defined as the first point of contact to ensure that the force application position is consistent during the test.

[0082] 5. By selecting any test line segment as the detection object, the representativeness and comprehensiveness of the detection are ensured, and the two endpoints of the test line segment are obtained to clarify the boundary and range of deformation detection, providing a basis for subsequent laser irradiation and deformation judgment. The laser is used to irradiate from one endpoint to the other to ensure the linearity and stability of the optical path, thereby providing a high-precision measurement basis for deformation detection. Q detection points are selected on the laser irradiation optical path to ensure that the deformation detection of the test segment has sufficient coverage and precision. Vertical segments are made from the detection points on the laser irradiation optical path in sequence to ensure that the offset of the test segment relative to the laser optical path can be accurately measured. By obtaining the length of each vertical segment, it is directly determined whether the test segment is deformed, providing a clear judgment standard for the test. By repeating steps S1 to S7, all test segments passed by the brake module when it stops are fully detected to ensure the comprehensiveness and accuracy of the hardness test.

[0083] 6. By obtaining the braking area during the previous test, it is ensured that the repeated testing of the tested area can be avoided in subsequent tests, thereby improving the coverage and accuracy of the test. The number of revolutions when the brake disc temperature rises to the specified test temperature during the current test is obtained to ensure that the test is carried out under standardized conditions. By continuing to rotate the brake disc and starting the brake module after exceeding the previous braking area, the influence of the tested area on the current test results is avoided, and the hardness test is ensured to cover more brake disc surfaces. When it is detected that the current braking area does not overlap with the last test area, the test is continued to the next temperature to ensure that the hardness test can be carried out in a non-repeated area. If it is detected that the current braking area overlaps with the previous test area, the brake disc is replaced and retested to ensure the independence of each test and the accuracy of the data. This step avoids result deviations caused by area overlap by replacing the brake disc, and ensures the consistency and repeatability of the test conditions.

[0084] 7. By clarifying the temperature that needs to be retested, the standardization and consistency of the test conditions are ensured, so that the test results can be effectively compared under the same temperature conditions. By accurately obtaining the center point of the brake module and constructing a vertical line, a spatial positioning basis is provided for subsequent tests. When the brake disc temperature rises to the target temperature for retesting, the current number of rotations is recorded to provide key data support for the next test steps. This step ensures that the test is carried out under appropriate temperature conditions. The temperature recording makes the subsequent test conditions more targeted. By measuring the length traveled counterclockwise from the brake module stop position to the starting point, the accurate division of the test area is ensured. It also provides basic data for subsequent deformation detection. By calculating the proportion of the length of the brake module on the test circumference, the relative size of the braking area is clarified, providing a quantitative indicator for the area coverage of the hardness test. The laser detection strategy can accurately determine whether the test line segment passed by the brake module when it stops is deformed, providing a non-destructive and efficient detection method for hardness testing. By judging the existence of deformation, it can directly draw a conclusion on whether the hardness is qualified, simplifying the analysis process of the test results. If no deformation is detected, the brake point dislocation strategy is adopted to continue testing to ensure comprehensive detection at different positions and avoid missing potential hardness problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 This is a schematic diagram of the laser detection of whether the test line segment is deformed according to the present invention. DETAILED DESCRIPTION

[0086] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0087] In one embodiment, a method for detecting the hardness of a brake disc component comprises:

[0088] Set the brake disc on the bracket;

[0089] Randomly select one surface of the brake disc as the heating surface;

[0090] Select another surface as the hardness test surface;

[0091] A friction module is provided on the heating surface;

[0092] The friction module is a metal block that comes into close contact with the brake disc when the brake disc rotates, generating heat using the principle of frictional heat generation;

[0093] A braking module is set on the hardness test surface;

[0094] The braking module is configured to apply force to the braking module to stop the rotating brake disc, wherein the direction of the force applied to the braking module is perpendicular to the hardness test surface of the brake disc;

[0095] The hardness of the brake disc is tested using a rotating line strategy on the brake disc hardness test surface.

[0096] Setting the brake disc on the bracket ensures the stability and safety of the brake disc during the testing process. The bracket provides a fixed platform to keep the brake disc stationary during operations such as rotation, heating, and hardness testing, avoiding errors caused by vibration or position offset. Any surface of the brake disc can be selected as the heating surface to flexibly adapt to different testing requirements and maximize the working efficiency of the equipment. This choice provides flexibility for the heating process and can be tested without specific conditions, thereby simplifying the operating steps and reducing time costs. Selecting another surface as the hardness test surface ensures the independence of the heating surface and the hardness test surface functions. This division of labor prevents heating and hardness testing from interfering with each other, thereby improving the accuracy of the test. Setting a friction module on the heating surface can simulate the temperature state of the brake disc under actual working conditions by generating heat through friction. The advantage of this design is that it more realistically reproduces the operation of the brake disc at high temperature, providing more accurate conditions for subsequent hardness testing. By generating heat through friction, it can It can effectively control and reproduce specific temperature conditions, ensuring that the hardness test is carried out in an environment closer to the actual use conditions, enhancing the practical applicability and credibility of the test results. A brake module is set on the hardness test surface to ensure that the rotation of the brake disc can be accurately stopped under specified conditions. This design ensures that the brake disc stops at a specific position and provides a stable hardness test benchmark. The direction of applied force is perpendicular to the hardness test surface of the brake disc, ensuring that the force transmission direction is orthogonal to the test surface, thereby maximizing the effective transmission of force. The advantage of this design is that it can avoid lateral force caused by angular deviation of the force, thereby preventing the brake disc from offsetting or tilting. Vertical force application not only improves the accuracy of brake module control, but also enhances the accuracy of hardness test results. The use of a rotating line strategy for hardness testing on the hardness test surface can fully cover the hardness distribution of the brake disc surface. This method avoids important areas that may be missed by point detection through linear scanning, thereby providing more comprehensive and detailed hardness data.

[0097] The method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes:

[0098] The circular surface where the hardness test surface is located is recorded as the test circular surface;

[0099] Get the center of the test circle;

[0100] Divide the circumference of the test circle into N equal parts;

[0101] Get all the segmentation points on the circumference, select any segmentation point as the first segmentation point, and sort and mark the segmentation points on the circumference in clockwise order;

[0102] Taking the center of the circle as the starting point and each segmentation point as the end point, the center of the circle and each segmentation point are connected respectively, and the formed line segment is recorded as a test line segment.

[0103] Marking the circular surface where the hardness test surface is located as the test circular surface helps to clarify the scope of the test area and ensure the accuracy and systematicness of the test process. Taking the center of the circle as the reference, the rotation line strategy can be effectively planned and executed to ensure the uniformity and consistency of each test segment. Dividing the circumference of the test circular surface into N equal parts can ensure the comprehensiveness and uniformity of the hardness test. Any split point can be selected as the first split point to flexibly adjust the test starting point and simplify the preparation work of the test process. Sorting and marking the split points in a clockwise order on the circumference ensures the orderly progress of the test and the logic of the data. The clockwise marking method allows subsequent hardness test operations to be performed in sequence, reducing the possibility of confusion and misoperation. Starting from the center of the circle and ending at each split point, the test segment can be accurately constructed to ensure comprehensive coverage of the test area. By marking each test segment, the test data can be accurately matched with its corresponding test position, facilitating subsequent data processing and analysis.

[0104] The method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes:

[0105] Set M test temperatures and arrange them in order from low to high, recording them as the first test temperature, the second test temperature, ... the Mth test temperature;

[0106] Obtain the number of revolutions of the brake disc when the brake disc temperature rises to each test temperature;

[0107] If the number of revolutions of the brake disc is a decimal, the number of revolutions of the brake disc is rounded up to an integer;

[0108] The rounding up is to obtain the decimal value of the brake disc revolutions, and the rounding down of the brake disc revolutions = the brake disc revolutions - the decimal value of the brake disc revolutions + 1;

[0109] The number of revolutions of the brake disc after treatment is recorded as the number of revolutions of the brake disc test;

[0110] Each test temperature and the corresponding brake disc test revolution number are respectively composed of a temperature revolution group.

[0111] Setting M test temperatures and arranging them in ascending order helps systematically evaluate the hardness performance of brake discs under different temperature conditions. By setting multiple test temperatures, the hardness variation trend of the brake disc material under different thermal conditions can be obtained. This strategy helps to identify potential weaknesses or performance degradation of the material at specific temperatures, providing an important reference for brake disc design and improvement. Obtaining the number of brake disc revolutions when the brake disc temperature rises to each test temperature helps to accurately record the dynamic performance of the brake disc under different temperatures. If the brake disc revolutions are decimal, the brake disc revolutions are rounded up to an integer. This strategy ensures more concise and unified data processing during the hardness test. By rounding up the decimal revolutions, the computational complexity during the test process can be avoided and the data analysis steps can be simplified. Each test temperature and the corresponding brake disc test revolutions are respectively organized into a temperature rotation array, which can intuitively reflect the relationship between temperature and revolutions. This structured data organization method facilitates the analysis of brake disc hardness performance under different temperature conditions. The temperature rotation array can effectively identify abnormalities or trend changes in brake disc revolutions at specific temperatures.

[0112] The method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes:

[0113] Get the center point of the brake module and draw a perpendicular line through the center point of the brake module to the brake disc hardness test surface;

[0114] The point where the vertical line intersects the brake disc is recorded as the initial point;

[0115] Rotate the brake disc and place the friction module in close contact with the brake disc, wherein no gap is formed between the brake disc and the friction module;

[0116] Control the brake disc to rotate clockwise;

[0117] When the temperature of the brake disc rises to the first test temperature, obtaining the current number of revolutions of the brake disc;

[0118] If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer, and start the brake module;

[0119] If the number of revolutions of the brake disc is an integer, the brake module is activated;

[0120] When the brake disc stops rotating, the position of the brake module on the brake disc is obtained;

[0121] From the stopping position of the brake module to the initial point counterclockwise, obtain the length of the brake module on the test circumference, and obtain the test line segment that the brake module passes through when it stops;

[0122] Calculate the ratio of the length of the brake module on the test circumference to the length of the test circumference. The ratio = the length of the brake module on the test circumference / 2πR, where R is the length of the test line segment. The ratio is recorded as the brake disc braking area.

[0123] Use a laser detection strategy to detect whether the test line segment that the brake module passes through when it stops is deformed;

[0124] If deformation occurs, the brake disc fails the hardness test at the first test temperature;

[0125] If no deformation occurs, continue testing using the brake module brake point dislocation strategy;

[0126] The braking point of the brake module is specifically the first point where the brake module contacts the brake disc when force is applied to the brake module.

[0127] By obtaining the center point of the brake module and drawing a vertical line perpendicular to the brake disc hardness test surface, the contact position between the brake module and the brake disc can be accurately determined. The point where the vertical line intersects the brake disc is recorded as the initial point, which can provide a clear starting point reference for subsequent test operations, ensuring that the friction module and the brake disc are in close contact without any gaps, and ensuring the uniform generation and conduction of friction heat. This operation helps to simulate real braking conditions and ensure the consistency of the temperature distribution of the brake disc throughout the test process. Through close contact, heat loss or uneven heating caused by poor contact can be effectively avoided, thereby ensuring the accuracy and reliability of the hardness test. Controlling the brake disc to rotate clockwise helps to standardize the rotation direction during the test, ensuring that the conditions of each test are consistent, and obtaining the position of the brake module when the brake disc stops rotating. , which can provide an accurate reference for subsequent hardness testing and deformation detection. By obtaining the length from the stopping position to the initial point of the brake module in the counterclockwise direction, the movement path of the brake module on the test circumference can be accurately calculated, and the proportion of the length passed by the brake module on the test circumference can be calculated, which helps to accurately quantify the distribution of the braking area on the test circumference. A laser detection strategy is used to detect whether the test line segment passed by the brake module when it stops is deformed, which helps to accurately evaluate the physical changes of the brake disc during the test. By detecting the deformation, it is judged that the hardness of the brake disc at the first test temperature is unqualified. If no deformation is detected, the brake module braking point dislocation strategy is adopted to further test to ensure the hardness of the brake disc. The brake module braking point is clearly defined as the first point of contact to ensure that the force application position is consistent during the test.

[0128] Reference Figure 1 The laser detection strategy is used to detect whether the test line segment passed by the brake module when it stops is deformed, specifically including:

[0129] S1. Select any test line segment that the brake module passes through when it stops as the detection line segment;

[0130] S2. Get the two endpoints of the detection line segment;

[0131] S3, using laser to irradiate from one end point to another;

[0132] S4, obtaining the optical path of laser irradiation;

[0133] S5. Select Q detection points on the laser irradiation path;

[0134] S6, sequentially draw vertical line segments perpendicular to the laser irradiation light path from the detection point on the laser irradiation light path to the detection line segment;

[0135] S7. Obtain the length of each vertical segment. If the lengths of the vertical segments are all 0, the detection segment is not deformed. If the lengths of any vertical segment are greater than 0, the detection segment is deformed.

[0136] Repeat steps S1 to S7 to sequentially detect whether the test line segments passed by the brake module when it stops are deformed.

[0137] By selecting any test line segment as the detection object, the representativeness and comprehensiveness of the detection are ensured, the two endpoints of the test line segment are obtained, the boundary and range of the deformation detection are clarified, and a basis is provided for subsequent laser irradiation and deformation judgment. The laser is used to irradiate from one endpoint to the other to ensure the linearity and stability of the optical path, thereby providing a high-precision measurement basis for deformation detection. Q detection points are selected on the laser irradiation optical path to ensure that the deformation detection of the test line segment has sufficient coverage and precision. Vertical segments are made from the detection points on the laser irradiation optical path in sequence to ensure that the offset of the test line segment relative to the laser optical path can be accurately measured. By obtaining the length of each vertical segment, it is directly determined whether the test line segment is deformed, providing a clear judgment standard for the test. By repeating steps S1 to S7, all test segments passed by the brake module when it stops are fully detected to ensure the comprehensiveness and accuracy of the hardness test.

[0138] The test is continued by adopting the brake module brake point staggering strategy, specifically including:

[0139] Get the braking area of ​​the brake disc during the last test;

[0140] Get the number of revolutions when the brake disc temperature rises to the test temperature during the current test;

[0141] If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer;

[0142] If the number of revolutions of the brake disc is an integer;

[0143] Continue to rotate the brake disc, and when the area where the brake disc rotates exceeds the braking area of ​​the brake disc, activate the brake module;

[0144] When the brake disc stops rotating, the position of the brake module on the brake disc is obtained;

[0145] Obtain the area that the brake module passes through on the brake disc and record it as the current braking area;

[0146] If the current braking area does not overlap with the braking area of ​​the brake disc during the previous test, proceed to the next temperature test;

[0147] If the current braking area overlaps with the brake disc braking area during the previous test, replace the brake disc and retest.

[0148] By obtaining the braking area during the previous test, it is ensured that repeated testing of the tested area can be avoided in subsequent tests, thereby improving the coverage and accuracy of the test. The number of revolutions when the brake disc temperature rises to the specified test temperature during the current test is obtained to ensure that the test is carried out under standardized conditions. By continuing to rotate the brake disc and starting the brake module after exceeding the previous braking area, the influence of the tested area on the current test results is avoided, and the hardness test is ensured to cover more brake disc surfaces. When it is detected that the current braking area does not overlap with the last test area, the test is continued to the next temperature to ensure that the hardness test can be carried out in a non-repeated area. If it is detected that the current braking area overlaps with the previous test area, the brake disc is replaced and retested to ensure the independence of each test and the accuracy of the data. This step avoids result deviations caused by area overlap by replacing the brake disc, and ensures the consistency and repeatability of the test conditions.

[0149] The replacement of the brake disc and retesting specifically include:

[0150] Get the test temperature when retesting is required;

[0151] Get the center point of the brake module and draw a perpendicular line through the center point of the brake module to the brake disc hardness test surface;

[0152] The point where the vertical line intersects the brake disc is recorded as the initial point;

[0153] Turn the brake disc and press the friction module against the brake disc;

[0154] Control the brake disc to rotate clockwise;

[0155] When the temperature of the brake disc rises to a test temperature at which retesting is required, the current number of revolutions of the brake disc is obtained;

[0156] If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer, and activate the brake module;

[0157] If the number of revolutions of the brake disc is an integer, the brake module is activated;

[0158] When the brake disc stops rotating, the position of the brake module on the brake disc is obtained;

[0159] From the stopping position of the brake module to the initial point counterclockwise, obtain the length of the brake module on the test circumference, and obtain the test line segment that the brake module passes through when it stops;

[0160] Calculate the ratio of the length of the brake module on the test circumference to the length of the test circumference. The ratio = the length of the brake module on the test circumference / 2πR, where R is the length of the test line segment. The ratio is recorded as the brake disc braking area.

[0161] Use a laser strategy to detect whether the test line segment that the brake module passes through when it stops is deformed;

[0162] If deformation occurs, the brake disc fails the hardness test at the test temperature and needs to be retested;

[0163] If no deformation occurs, continue testing using the brake module brake point dislocation strategy;

[0164] The braking point of the brake module is specifically the first point where the brake module contacts the brake disc when force is applied to the brake module.

[0165] By specifying the temperature at which retesting is required, standardization and consistency of test conditions are ensured, allowing effective comparison of test results under the same temperature conditions. Accurately determining the center point of the brake module and constructing a perpendicular line provides a spatial positioning basis for subsequent testing. When the brake disc temperature rises to the target temperature for retesting, the current rotational speed is recorded, providing key data support for subsequent testing steps. This step ensures that the test is conducted under appropriate temperature conditions, and temperature recording makes subsequent testing conditions more targeted. Measuring the distance traveled counterclockwise from the brake module's stopping position to the starting point ensures accurate demarcation of the test area and provides basic data for subsequent deformation testing. Calculating the proportion of the brake module's length traveled along the test circumference clarifies the relative size of the braking area and provides a quantitative indicator for the area coverage of the hardness test. A laser detection strategy can accurately determine whether the test segment traversed by the brake module when stopped, providing a non-destructive and efficient means for hardness testing. By determining the presence of deformation, a hardness qualification can be directly determined, simplifying the analysis of test results. If no deformation is detected, a braking point staggering strategy is used to continue testing, ensuring comprehensive testing at different locations and avoiding missing potential hardness issues.

[0166] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0167] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for detecting the hardness of a brake disc part, characterized in that: include: Set the brake disc on the bracket; Randomly select one surface of the brake disc as the heating surface; Select another surface as the hardness test surface; A friction module is provided on the heating surface; The friction module is a metal block that comes into close contact with the brake disc when the brake disc rotates, generating heat using the principle of frictional heat generation; A braking module is set on the hardness test surface; The braking module is configured to apply force to the braking module to stop the rotating brake disc, wherein the direction of the force applied to the braking module is perpendicular to the hardness test surface of the brake disc; The hardness of the brake disc is tested using a rotating line strategy on the brake disc hardness test surface; The method of testing the hardness of the brake disc using a rotating line strategy on the brake disc hardness test surface specifically includes: The circular surface where the hardness test surface is located is recorded as the test circular surface; Get the center of the test circle; Divide the circumference of the test circle into N equal parts; Get all the segmentation points on the circumference, select any segmentation point as the first segmentation point, and sort and mark the segmentation points on the circumference in clockwise order; Take the center of the circle as the starting point and each segmentation point as the end point, connect the center of the circle and each segmentation point respectively, and record the formed line segment as the test line segment; Set M test temperatures and arrange them in order from low to high, recording them as the first test temperature, the second test temperature, ... the Mth test temperature; Obtain the number of revolutions of the brake disc when the brake disc temperature rises to each test temperature; If the number of revolutions of the brake disc is a decimal, the number of revolutions of the brake disc is rounded up to an integer; The rounding up is to obtain the decimal value of the brake disc revolutions, and the rounding down of the brake disc revolutions = the brake disc revolutions - the decimal value of the brake disc revolutions + 1; The number of revolutions of the brake disc after treatment is recorded as the number of revolutions of the brake disc test; Each test temperature and the corresponding brake disc test revolution number are respectively formed into a temperature revolution group; Get the center point of the brake module and draw a perpendicular line through the center point of the brake module to the brake disc hardness test surface; The point where the vertical line intersects the brake disc is recorded as the initial point; Rotate the brake disc and place the friction module in close contact with the brake disc, wherein no gap is formed between the brake disc and the friction module; Control the brake disc to rotate clockwise; When the temperature of the brake disc rises to the first test temperature, obtaining the current number of revolutions of the brake disc; If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer, and start the brake module; If the number of revolutions of the brake disc is an integer, the brake module is activated; When the brake disc stops rotating, the position of the brake module on the brake disc is obtained; From the stopping position of the brake module to the initial point counterclockwise, obtain the length of the brake module on the test circumference, and obtain the test line segment that the brake module passes through when it stops; Calculate the ratio of the length of the brake module on the test circumference to the length of the test circumference. The ratio = the length of the brake module on the test circumference / 2πR, where R is the length of the test line segment. The ratio is recorded as the brake disc braking area. Use a laser detection strategy to detect whether the test line segment that the brake module passes through when it stops is deformed; If deformation occurs, the brake disc fails the hardness test at the first test temperature; If no deformation occurs, continue testing using the brake module brake point dislocation strategy; The braking point of the brake module is specifically the first point where the brake module contacts the brake disc when force is applied to the brake module.

2. A method for detecting the hardness of a brake disc component according to claim 1, characterized in that: The laser detection strategy is used to detect whether a test line segment passed by the brake module when it stops is deformed, specifically including: S1. Select any test line segment that the brake module passes through when it stops as the detection line segment; S2. Get the two endpoints of the detection line segment; S3, using laser to irradiate from one end point to another; S4, obtaining the optical path of laser irradiation; S5. Select Q detection points on the laser irradiation path; S6, sequentially draw vertical line segments perpendicular to the laser irradiation light path from the detection point on the laser irradiation light path to the detection line segment; S7. Obtain the length of each vertical segment. If the lengths of the vertical segments are all 0, the detection segment is not deformed. If the lengths of any vertical segment are greater than 0, the detection segment is deformed. Repeat steps S1 to S7 to sequentially detect whether the test line segments passed by the brake module when it stops are deformed.

3. A method for detecting the hardness of a brake disc component according to claim 2, characterized in that: The test is continued by adopting the brake module brake point staggering strategy, specifically including: Get the braking area of ​​the brake disc during the last test; Get the number of revolutions when the brake disc temperature rises to the test temperature during the current test; If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer; If the number of revolutions of the brake disc is an integer; Continue to rotate the brake disc, and when the area where the brake disc rotates exceeds the braking area of ​​the brake disc, activate the brake module; When the brake disc stops rotating, the position of the brake module on the brake disc is obtained; Obtain the area that the brake module passes through on the brake disc and record it as the current braking area; If the current braking area does not overlap with the braking area of ​​the brake disc during the previous test, proceed to the next temperature test; If the current braking area overlaps with the brake disc braking area during the previous test, replace the brake disc and retest.

4. A method for detecting the hardness of a brake disc component according to claim 3, characterized in that: The replacement of the brake disc and retesting specifically include: Get the test temperature when retesting is required; Get the center point of the brake module and draw a perpendicular line through the center point of the brake module to the brake disc hardness test surface; The point where the vertical line intersects the brake disc is recorded as the initial point; Turn the brake disc and press the friction module against the brake disc; Control the brake disc to rotate clockwise; When the temperature of the brake disc rises to a test temperature at which retesting is required, the current number of revolutions of the brake disc is obtained; If the number of revolutions of the brake disc is not an integer, continue to rotate the brake disc until the number of revolutions becomes an integer, and activate the brake module; If the number of revolutions of the brake disc is an integer, the brake module is activated; When the brake disc stops rotating, the position of the brake module on the brake disc is obtained; From the stopping position of the brake module to the initial point counterclockwise, obtain the length of the brake module on the test circumference, and obtain the test line segment that the brake module passes through when it stops; Calculate the ratio of the length of the brake module on the test circumference to the length of the test circumference. The ratio = the length of the brake module on the test circumference / 2πR, where R is the length of the test line segment. The ratio is recorded as the brake disc braking area. Use a laser strategy to detect whether the test line segment that the brake module passes through when it stops is deformed; If deformation occurs, the brake disc fails the hardness test at the test temperature and needs to be retested; If no deformation occurs, continue testing using the brake module brake point dislocation strategy; The braking point of the brake module is specifically the first point where the brake module contacts the brake disc when force is applied to the brake module.

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