Engineering rubber track performance scene testing method

Abstract

The invention discloses a scene test method for performance of an engineering rubber track, which comprises the following steps of: mounting the rubber track on an engineering machinery device by taking a walking part, namely the rubber track, of engineering machinery as a test object; the method comprises the following steps: simulating various walking routes, operations, driving habits and the like on working scene pavements with different terrains, gradients and hardness degrees to test the rubber tracks; performing a comparison test on two rubber tracks on the same engineering machinery under the same outdoor test condition; according to the method, the influence factors of different product designs, different formula designs, different working conditions, different driving operation habits and the like on the service life of the engineering machinery rubber crawler belt are represented, and powerful data support is provided for research and development of high-performance rubber crawler belt products.

Description

Technical field:

[0001] The present invention relates to the field of rubber track performance testing, in particular to a method for testing the performance of an engineering rubber track under simulated outdoor scene working conditions, and more particularly to a method for testing the performance of an engineering rubber track in a scene. Background technology:

[0002] Rubber tracks are widely used in agricultural machinery, engineering machinery and transport machinery due to their low ground pressure, high traction, low vibration, low noise and no damage to the road surface. As a walking component of engineering machinery, the performance and service life of rubber tracks are directly related to the overall operating efficiency and stability of engineering machinery. In view of the wide variety of engineering machinery models and specifications, the service life and performance of rubber track products are often difficult to fully evaluate through a single laboratory test result. Product service life data mainly depends on market feedback, and the time cycle of market feedback is relatively long, which is difficult to match the speed of market product updates. How to provide performance testing methods for rubber tracks to meet the high performance requirements and quality assurance of rubber track products for engineering machinery is the development vision of the entire rubber track industry.

[0003] As in Chinese patent application No. 202310624366.5, the invention name is "A method for testing the outdoor performance of rubber tracks". The invention discloses a method for testing the outdoor performance of rubber tracks, including a rubber track wear performance test and a rubber track edge breaking durability test. The rubber track wear performance test lasts for 100 hours in total and is divided into 4 stages, with each stage lasting 25 hours. After each stage is completed, the measurement data is recorded according to the prescribed method, and the rubber track wear data can be accurately tested. The rubber track edge breaking durability test uses a crawler to repeatedly roll over the curb until the edge breaks, which can test the durability of the rubber track. It cannot be used as a full-scene test to simulate outdoor environments, and there is no specific description of its test performance effect on rubber tracks. That is to say, how is the performance of the rubber track in use, etc.

[0004] There is also the invention titled "A Method for Testing the Durability of Tracks" disclosed in application number 202311681849.5. The present invention discloses a method for testing the durability of tracks, and the testing machine used therein includes: a track drive assembly, which is used to install and drive the track to be tested to rotate, including a tensioning wheel assembly to adjust the tension of the track; a drum assembly, including a drum, which is arranged on the side of the track drive assembly, and the drum is used to contact the track to be tested to provide friction resistance to the track; a loading assembly, which is used to drive the track drive assembly to move in a direction close to the drum assembly so that the track contacts the drum. The test method includes: installing the track to be tested on the track drive assembly, and adjusting the tension of the track by the tensioning wheel assembly; the loading assembly drives the track drive assembly to move in a direction close to the drum assembly until the vertical section of the track contacts the drum; the drum and the track rotate, and the drum acts as a simulated road surface to provide friction resistance to the track. This test method provides more accurate and reliable durability performance test data by simulating the actual working conditions of rubber tracks.

[0005] It can be seen from the specific scheme disclosed above that, firstly, the rubber track is not tested under outdoor scene conditions, and secondly, it is necessary to use equipment to detect the performance of the track. The performance effect test of the rubber track still has great limitations.

[0006] Therefore, how to provide a performance scenario test method for engineering rubber tracks. It aims to simulate the actual working environment of engineering machinery more realistically, so as to more accurately evaluate the performance of the product. In view of the wear and cutting resistance of existing traditional rubber tracks, outdoor scenario simulation tests are conducted on the conditions such as easy damage, chipping and falling of rubber track patterns, and uneven grinding of patterns, so as to more realistically simulate the actual working environment of engineering machinery, so as to more accurately evaluate the performance of rubber track products in actual applications. The method is simple and convenient. Summary of the invention:

[0007] The present invention provides a performance scenario testing method for engineering rubber tracks. The rubber tracks of engineering machinery walking parts are used as the test objects. The rubber tracks are installed on engineering machinery devices. Various walking routes, operations and driving habits are simulated to test the rubber tracks on working scene roads with different terrains, slopes and hardness levels. Two rubber tracks on the same engineering machinery are compared and tested under the same test conditions outdoors to characterize the factors affecting the service life of engineering machinery rubber tracks such as different product designs, different formula designs, different working conditions or different driving operation habits, so as to provide strong data support for the research and development of high-performance rubber track products.

[0008] The present invention discloses a method for testing the performance of engineering rubber tracks in scenarios. The method takes the rubber tracks of engineering machinery as the test object, installs the rubber tracks on the engineering machinery device, and simulates various walking routes, operations and driving behaviors on working scene roads with different terrains, slopes and hardness to test the rubber tracks. The method comprises the following steps: the engineering machinery equipped with the rubber tracks of the test object is subjected to the following cycle test under the following scene conditions of different terrains, slopes and hardness, and each cycle test completes all operations of each route in the order of routes A, B, C, D and E;

[0009] Route A: Control one rubber track on the construction machinery in a "" shape to keep it stationary and move it in a clockwise circle; then control the other track to keep it stationary and move it in a counterclockwise circle; one complete "" shape circle is counted as 1 time;

[0010] Route B consists of four parts: B1, B2, B3, and B4.

[0011] B1: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track to move one circle in clockwise direction;

[0012] B2: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track to move one circle in the counterclockwise direction;

[0013] B3: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track is operated to rotate one circle in the clockwise direction. Then, control one rubber track on the engineering machinery to remain stationary, and the other rubber track is operated to rotate one circle in the counterclockwise direction. The clockwise rotation and the counterclockwise rotation are completed as one time;

[0014] B4: Control the two rubber crawlers on the construction machinery to move and rotate simultaneously. The specific operation is that one crawler rotates forward and the other crawler rotates reversely. The control operation rotates counterclockwise for one circle and then immediately rotates clockwise for one circle, which is one time;

[0015] Route C: Set the test road route to a "W"-shaped curve, control the two rubber tracks on the construction machinery to move simultaneously, and complete the back and forth movement along the "W"-shaped curve route, which is 1 time;

[0016] Route D: Set the test road route to a right-angle "W"-shaped zigzag curve with a turning angle of 88-92°; preferably 90 degrees, control the two rubber tracks on the engineering machinery to move simultaneously, and complete the back and forth walking along the right-angle "W"-shaped zigzag curve route, which is 1 time;

[0017] Route E: Set the test road route as a straight line, and walk uphill when coming and downhill when returning. Control the two rubber tracks on the construction machinery to move at the same time, and complete the round trip as one time;

[0018] After completing the above-mentioned complete cycle test, the surface cracks and wear degree of the test rubber track are recorded and analyzed.

[0019] The performance scenario testing method for an engineering rubber track, wherein the cyclic test frequency is 1-5 cycles per day; the surface cracks include inner and outer cracks and wheel side cracks on the pattern side of the rubber track; the degree of wear characterizes the wear resistance of the rubber track in actual use, and the wear degree test includes a fixed-point wear test and an overall wear test.

[0020] The cycle test described in the present invention is a cycle test for each time, wherein route A is repeated 8-12 times; route B, wherein B1, B2:, are repeated 8-12 times respectively, B3, B4: are repeated 8-12 times respectively, and the rotation and walking are repeated 8-12 times respectively; route C, route D, and route E are repeated 8-12 times respectively.

[0021] The present invention provides a scenario testing method for the performance of an engineering rubber track, which is to control each cycle test to be completed in the order of routes A, B, C, D, and E, with the test time of each route being 10-25% of the total test time, route B accounting for 50-55% of the total test time, and routes C, D, and E accounting for 30-35% of the total test time.

[0022] The present invention discloses a method for testing the performance of engineering rubber tracks in scenarios, wherein the turning angle of the "W"-shaped curve of route C is controlled at 120-130°; the right-angle "W"-shaped zigzag curve of route D is controlled at a turning angle of 88-92°; the angle of the turning is preferably 90°; Figure 5 shown.

[0023] Furthermore, the present invention discloses a method for testing the performance scenarios of engineering rubber tracks, wherein the overall wear test is to measure the tread groove heights before and after the wear of the rubber track, and calculate the wear change rate of the tread groove heights of the test object rubber track; and the tread heights of different rubber tracks are measured at multiple different positions, and the average value is calculated, and the number of samples at different positions of different rubber tracks is controlled to be no less than 50% of the number of sections of the entire rubber track to calculate the average value.

[0024] The present invention discloses a method for testing the performance scenarios of engineering rubber tracks, wherein, in a fixed-point wear test, three evenly distributed and symmetrical positions X, Y, and Z are selected on the rubber track as fixed-point measurement sample positions, and corresponding position marks are made; the test duration is recorded daily, and the pattern height corresponding to the sample position and the test duration is measured and the arithmetic mean is calculated; an actual pattern height change curve is drawn according to the test duration and the corresponding arithmetic mean, which is used to evaluate the accuracy, predictive ability, and trend consistency between data of the pattern height change fitting curve of the overall wear test.

[0025] The present invention discloses a method for testing the performance scenarios of engineering rubber tracks, wherein the three positions X, Y, and Z all include the inner side of the rubber track and the outer side of the rubber track, and the measurement values ​​are based on the positions at the center points of the pattern grooves on the inner side of the rubber track and the outer side of the rubber track corresponding to the three positions X, Y, and Z of the rubber track as measurement reference points.

[0026] The method for testing the performance scenario of an engineering rubber track controls any two test rubber tracks of the test object. During each cycle test, when all operations of each route are completed in the order of routes A, B, C, D, and E, the test operation time of each corresponding route is relatively equal.

[0027] The present invention discloses a method for testing the performance of engineering rubber tracks in scenarios, which has the following beneficial effects: simulating outdoor diversified working scenarios, the outdoor scenarios of the present invention are designed to be 35-100 meters in length and 15-50 meters in width, and simulate actual road conditions under conditions such as open-air sand and gravel, concrete crushed stone, gravel ground and concrete ground, covering different terrains, slopes, and degrees of softness and hardness, etc., so as to more comprehensively simulate the actual working environment. At the same time, the present invention uses commercially available engineering machinery vehicles as test devices, equips the rubber tracks to be tested, and simulates various loads and damages on the rubber tracks to be tested under working conditions such as simulated actual engineering machinery road conditions, driving routes and operating habits, so as to accurately reflect the actual use of the rubber tracks of the test object.

[0028] First, by conducting long-term, high-intensity tests on rubber tracks in this environment, the test data obtained is more comprehensive, in-depth, accurate and closer to the actual situation, so as to accurately evaluate its performance under various complex working conditions. This helps to better understand the characteristics of rubber track products and provide strong support for the design and optimization of rubber track products;

[0029] Second, the present invention simulates and designs five routes for construction machinery in actual operation. It runs along the routes under harsh road conditions. Through cyclic route simulation, it can truly restore the performance of rubber tracks in actual working conditions. At the same time, it can also simulate road sites with different degrees of hardness and softness. Taking test route A as an example, it can simulate the scenario of cross-regional operations during customer use, so as to more accurately restore the performance of rubber tracks under actual working conditions;

[0030] Third, the present invention simulates the actual working conditions of engineering machinery transporting materials such as sand and stone, so as to comprehensively evaluate the performance of the rubber track in the actual transportation process. Through these comprehensive simulation tests, more accurate, practical and reliable data support is provided for the design, manufacture and use of rubber tracks.

[0031] Fourth, during the test, the present invention can monitor and record the key indicators of the rubber track such as wear resistance, crack resistance, and service life in real time. At the same time, the walking stability and running noise of the rubber track in different scenarios can also be measured to more comprehensively evaluate its overall performance.

[0032] Through this innovative scenario testing method of the present invention, we can more accurately predict the performance of rubber tracks in actual use and provide customers with a more reliable basis for product selection. At the same time, the method of the present invention is also helpful to timely discover potential problems and make improvements during the product development stage, thereby improving the quality and competitiveness of the designed and produced rubber track products.

[0033] The rubber track scenario testing method disclosed in the present invention is an innovative and practical performance evaluation method;

[0034] It will provide strong technical support for the research and development, production and market promotion of rubber track products, and promote technological progress and industrial upgrading of rubber track production in the construction machinery industry.

[0035] The various properties of the rubber track used for testing by the present invention comply with GB / T 20786-2015, "JLL-TD-GL-05 Rubber Quick Test Standard" and "JLL-TD-GL-06 Rubber Routine Inspection Standard"; and the appearance of the rubber track produced by the present inventor complies with the "Finished Product Quality Inspection Internal Control Standard", and the width, pitch, number of sections, track, etc. are adapted to the test vehicle model. Description of the drawings:

[0036] Figure 1 , is a method for testing the performance of an engineering rubber track in a scenario according to an embodiment of the present invention, and schematic diagrams of scenarios of five routes;

[0037] Figure 2 , is a schematic diagram of route A of the scenario testing method of the present invention;

[0038] Figure 3 , is a schematic diagram of route B of the scenario testing method of the present invention;

[0039] Figure 4 , is a schematic diagram of route C of the scenario testing method of the present invention;

[0040] Figure 5 , is a schematic diagram of route D of the scenario testing method of the present invention;

[0041] Figure 6 , is a schematic diagram of route E of the scenario testing method of the present invention;

[0042] Figure 7 , is a side view schematic diagram of a rubber crawler installed on an engineering machine for scene testing according to an embodiment of the present invention;

[0043] Figure 8 ,for Figure 7 Enlarged schematic diagram of the middle H part;

[0044] Fig. 9 , is a schematic diagram of the fixed-point measurement sample positions for testing the performance of the rubber track to be tested of the present invention: three positions X, Y, and Z that are evenly and symmetrically distributed; that is, a schematic diagram of 6 measurement samples respectively arranged at the three positions X, Y, and Z of the rubber track, including the corresponding inner side or inner side and outer side;

[0045] Fig.10 , the fitting curve of the change in pattern height of the overall wear test of the rubber crawler of Example 1 of the present invention; that is, the fitting curve of the change rate of pattern height wear after 250.3 hours of test operation of Example 1; the line connecting the square black dots in the figure represents the outer side of the rubber crawler, and the line connecting the round black dots represents the inner side;

[0046] Fig.11 , the actual pattern height change curve measured by the fixed-point wear test of the rubber track of Example 1 of the present invention; that is, the pattern height change curve of the fixed-point wear test of Example 1 after 250.3 hours of test operation; the dotted line in the figure shows the outer side average value, and the solid line shows the inner side average value;

[0047] Fig.12 , the fitting curve of the change in tread height of the rubber track overall wear test of Example 2 of the present invention; that is, the fitting graph of the tread height wear change rate curve of Example 2 after 250.3 hours of test operation;

[0048] Fig.13 , the actual pattern height change curve measured by the fixed-point wear test of the rubber track of Example 2 of the present invention; that is, the pattern height change curve of the fixed-point wear test of Example 2 after 250.3 hours of test operation;

[0049] Description: In the figure, 1. pattern groove, i.e., the pattern groove provided on the rubber track; 2. inner side of the rubber track, i.e., the side of the rubber track close to one side of the engineering machinery body; 3. outer side of the rubber track, i.e., the side of the rubber track away from one side of the engineering machinery body; 4. engineering machinery, which is an engineering machinery used to test the performance of the rubber track; 5. rubber track; 6. center point of the pattern groove, which is the center position of the pattern groove on the rubber track; in the figure, X, Y, and Z are three positions respectively provided on the inner and outer sides of the test rubber track for testing the performance of the rubber track;

[0050] Attached Fig. 9 In the figure, X, Y, and Z are three sample position points for fixed-point wear testing, which are respectively arranged on the inner side and the outer side of the test rubber track.

[0051] Attached Fig.10 To Attachment Fig.13 In the figure, the curve located at the bottom close to the horizontal axis from left to right is the inner side, and the other curve located at the top is the outer side; the inner side represents the test data line of the pattern height on the inner side of the rubber track, and the outer side represents the test data line of the pattern height on the outer side of the rubber track. Specific implementation method:

[0052] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to the embodiments.

[0053] like Figure 1-9 As shown, the present invention discloses a method for testing the performance of engineering rubber tracks in scenarios. The rubber tracks, which are walking parts of engineering machinery, are used as the test objects. The rubber tracks are installed on engineering machinery devices, and various walking routes, operations, and driving habits are simulated on working scene roads with different terrains, slopes, and hardness to test the rubber tracks. The method comprises the following steps: the engineering machinery equipped with the rubber tracks of the test object is subjected to the following cycle test under the following conditions of different terrains, slopes, and hardness of the road scenes. Each cycle test completes all operations of each route in the order of routes A, B, C, D, and E.

[0054] Route A: Control one rubber track of the engineering machinery in a "" shape to keep it stationary and move it in a clockwise circle; at the same time, control the other track to keep it stationary and move it in a counterclockwise circle; one complete "" shape circle is counted as 1 time.

[0055] Route B: It consists of four parts: B1, B2, B3 and B4.

[0056] B1: Control one rubber track on the construction machinery to remain stationary, and the other rubber track to move one circle in a clockwise direction.

[0057] B2: Control one rubber track on the engineering machinery to remain stationary, while the other rubber track moves one circle in the counterclockwise direction.

[0058] B3: Control one rubber track on the engineering machinery to keep still, and the other rubber track is operated to rotate one circle in the clockwise direction. Conversely, control one rubber track on the engineering machinery to keep still, and the other rubber track is operated to rotate one circle in the counterclockwise direction. One clockwise rotation and one counterclockwise rotation are completed as one time.

[0059] B4: Control the two rubber crawler tracks on the construction machinery to move and rotate simultaneously. The specific operation is that one crawler track rotates forward and the other crawler track rotates reversely. The control operation rotates counterclockwise for one circle and then immediately rotates clockwise for one circle as one time.

[0060] like Figure 4 As shown, Route C: Set the test road route to a "W"-shaped curve with a turning angle of about 120-130°; control the two rubber tracks on the engineering machinery to move simultaneously, and complete a back-and-forth walk along the "W"-shaped curve route as one time.

[0061] like Figure 5 As shown, route D: the test road route is set as a right-angle "W"-shaped zigzag curve, and the turning angle is controlled between 88-92 degrees, preferably 90 degrees, such as Figure 5 As shown; the two rubber tracks on the engineering machinery are controlled to move simultaneously, and to complete a back and forth movement along a right-angle "W"-shaped zigzag curve route as one time.

[0062] like Figure 6 As shown, Route E: Set the test road route as a straight line, go uphill when coming and downhill when returning, control the two rubber tracks on the engineering machinery to move simultaneously, and complete the back and forth walking as 1 time.

[0063] The above complete test is completed as one cycle, and the surface cracks and wear degree of the test rubber track are recorded and analyzed regularly.

[0064] The cycle test is preferably controlled to be 1-5 cycles per day; the surface cracks include inner and outer cracks and wheel side cracks on the rubber track pattern side; the wear degree can characterize the wear resistance of the rubber track in actual use, and the wear test includes fixed-point wear test and overall wear test.

[0065] The preferred cyclic test is a cyclic test in which route A is repeated 8-12 times; route B, wherein B1, B2: are repeated 8-12 times respectively, B3, B4: are repeated 8-12 times respectively, and the rotation operation is repeated 8-12 times respectively; route C, route D, and route E are repeated 8-12 times respectively.

[0066] The engineering rubber track performance scenario testing method of the present invention controls each cycle test to complete the test time of each route in the order of routes A, B, C, D, and E, with route A accounting for 10-25% of the total test time, route B accounting for 50-55% of the total test time, and routes C, D, and E accounting for 30-35% of the total test time.

[0067] The present invention discloses a method for testing the performance scenarios of engineering rubber tracks. The overall wear test thereof is to periodically select a plurality of different sample positions on two test tracks of the same period, respectively, measure the rubber track pattern height corresponding to the test time period, and control the number of samples at different positions to be no less than 50% of the total number of sections of the entire rubber track, calculate the arithmetic mean of the pattern height corresponding to each test time period, and then calculate the test rubber track pattern height change curve based on the arithmetic mean of the rubber track pattern height corresponding to the time period; and count the number of surface cracks on the rubber track and the growth and change of the crack length.

[0068] The invention discloses a method for testing the performance of engineering rubber tracks in scenarios. The fixed-point wear test is to select three evenly distributed and symmetrical positions X, Y, and Z on the rubber track as fixed-point measurement sample positions, and mark the corresponding positions. The test duration is recorded daily, and the pattern height corresponding to the sample position and the test duration is measured and the arithmetic mean is calculated. The actual pattern height change curve is drawn according to the test duration and the corresponding arithmetic mean, which is used to evaluate the accuracy, predictive ability, and trend consistency of the pattern height change fitting curve of the overall wear test.

[0069] Furthermore, the three positions X, Y, and Z include the inner side and outer side of the rubber track, and the measurement values ​​are based on the center point 6 of the pattern groove on the inner side and outer side of the rubber track corresponding to the three positions X, Y, and Z of the rubber track as the measurement reference point. The test data are shown in Table 4 and Table 8;

[0070] The method for testing the performance scenario of an engineering rubber track is to control any two test rubber tracks in each cycle test process, and when all operations of each route are completed in the order of routes A, B, C, D, and E, the test operation time of each corresponding route is relatively equal.

[0071] In order to improve the test accuracy of the scenario test method of engineering rubber tracks or provide strong support for R&D design, two rubber tracks with different product specifications or different formula performance can be installed on a test engineering machine to evaluate the performance of different designs on the product in actual applications. In order to ensure the accuracy and comparability of the rubber track performance test, in actual operation, it is necessary to ensure that the running track and scenario test time of each tested rubber track are the same or basically the same during the scenario test, that is, to ensure that each rubber track undergoing scenario testing can complete the operation of each route in the order of routes A, B, C, D, and E. It is also possible that the two rubber tracks on a test engineering machine are engineering rubber tracks of the same specifications and models, with the same material components and proportions, and the same functional requirements, to test the impact of driving habits on the performance of rubber tracks installed on both sides of the same engineering machine under actual working conditions.

[0072] The engineering rubber crawler performance scenario testing method of the present invention requires that the engineering rubber crawler to be tested completes each cycle test in the order of routes A, B, C, D, and E, and the test time of each route is that route A accounts for 10-25% of the total test time, route B accounts for 50-55% of the total test time, and routes C, D, and E account for 30-35% of the total test time. That is to say, in order to ensure the accuracy and comparability of the test, it is ensured that each rubber crawler undergoing scenario testing has the same time, the same route, and the same test scenario when passing through the above test route. For example, after a round of test operations, the tested road surface should be standardized and arranged to the same state as the test scenario of the previous round of rubber crawlers.

[0073] The following is a detailed description of the scene performance test of the commercially available engineering rubber track prepared by the inventor's company. The various properties of the rubber track comply with GB / T 20786-2015, that is, the various properties of the rubber track to be tested meet the requirements of the above standard. The parts not described in the following embodiments are the same as the description of the above implementation method.

[0074] The following embodiment is based on two rubber tracks selected from commercially available rubber track products prepared by the inventor's company. The products have the same specifications and are both engineering rubber tracks used in engineering machinery. However, different rubber formulations were used in the preparation of the two rubber tracks for scenario testing to compare the effects of different formulation designs on the actual application performance of the products.

[0075] The specifications and models of the rubber tracks used in the following examples are: 450 / 86 / 56;

[0076] The tested construction machinery type is a loader of a certain Shanhe company. The empty weight is about 4400-4500kg, and the loading and unloading bucket weight is about 1200kg; the total load when fully loaded is about 5600-5700kg;

[0077] The test location is the outdoor scene test area of ​​the inventor's company, and the effective length of the test area is controlled to be within the range of 35-100m and the width is within the range of 15-50m;

[0078] The test road surface is concrete / gravel road.

[0079] The test specifications all adopt the above method of the present invention; the recording range / reporting interval is once a day; the daily operating time, the daily test operation time is at least about 6-10 hours; that is, in the actual scenario test, the rubber track is operated on the test engineering machinery for 28 days, and the corresponding data is measured regularly; the daily scenario test operation time is kept the same as much as possible, and the total time of the actual scenario test is 250.3 hours.

[0080] All matters not described in the following embodiments are the same as those described in the above embodiments.

[0081] Example 1

[0082] The engineering rubber track prepared by the inventor's company used in this embodiment is code-named: rubber track JLLA, and its components include: 15-90 parts of natural rubber, 5-25 parts of styrene-butadiene rubber, 50-70 parts of carbon black, 5-30 parts of white carbon black, 1-3 parts of tear-resistant resin, 1-2.5 parts of sulfur, 1-1.5 parts of accelerator, etc. All components involved in the specific embodiment can be obtained from the market and prepared according to the product preparation method of the inventor's company.

[0083] like Figure 1-9 As shown, the present embodiment discloses a method for testing the performance scenario of an engineering rubber track, which takes the walking component of an engineering machinery - the rubber track as the test object, installs the rubber track on the engineering machinery device, and simulates various walking routes and operations and driving habits on working scene roads with different terrains, slopes, and hardness to test the rubber track; the method comprises the following steps: the engineering machinery equipped with the test object rubber track is subjected to the following cycle test under the following different terrains, slopes, and hardness of the road scene conditions, and each cycle test completes all operations of each route in the order of routes A, B, C, D, and E;

[0084] like Figure 2 As shown, route A: control one rubber track on the engineering machinery to keep it stationary and move it clockwise for one circle; at the same time, control the other track to keep it stationary and move it counterclockwise for one circle; walking a complete "" shape circle is 1 time, and a total of 10 operations are completed; the operation time of this scenario accounts for 25% of the total time during the test period, which is about 62.5 hours;

[0085] like Figure 3As shown, route B consists of four parts: B1, B2, B3, and B4. The operation time of this scenario accounts for 45% of the total time during the test period, which is about 112.6 hours. Among them, B1-B4 has four sections, and the time of each section is controlled at a certain level, that is,

[0086] B1: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track to move 10 circles in clockwise direction.

[0087] B2: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track to move 10 circles in the counterclockwise direction.

[0088] B3: Control one rubber track on the engineering machinery to keep still, and the other rubber track is operated to rotate one circle in the clockwise direction. Conversely, control one rubber track on the engineering machinery to keep still, and the other rubber track is operated to rotate one circle in the counterclockwise direction. One clockwise rotation and one counterclockwise rotation are completed as one time, and the walking is 10 times.

[0089] B4: Control the two rubber crawlers on the rubber crawler on the engineering machinery to move and rotate simultaneously. The specific operation is that one crawler rotates forward and the other crawler rotates reversely. The control operation rotates counterclockwise for one circle and then immediately rotates clockwise for one circle as one time, and walks 10 times.

[0090] like Figure 4 As shown; Route C: Set the test road route to a "W"-shaped curve with a turning angle of about 120-130°; control the two rubber tracks on the engineering machinery to move simultaneously, and complete the back and forth walking along the "W"-shaped curve route as 1 time, repeat 10 times, and the operation time of this scenario during the test cycle accounts for 10% of the total time, which is about 25 hours;

[0091] like Figure 5 As shown, route D: the test road route is set as a right-angle "W" zigzag curve with a turning angle of 90°; the two rubber tracks on the engineering machinery are controlled to move simultaneously, and the back and forth walking is completed along the right-angle "W" zigzag curve road route as 1 time, and repeated 10 times. The operation time of this scenario during the test cycle accounts for 10% of the total time, which is about 25 hours;

[0092] like Figure 6 As shown in the figure, route E: the test road route is set as a straight line, and the road is uphill when coming and downhill when returning. The two rubber tracks on the engineering machinery are controlled to move and walk at the same time. The completion of the back and forth walking is counted as 1 time, and repeated 10 times. The operation time of this scenario during the test cycle accounts for 10% of the total time, which is about 25 hours;

[0093] Completion of the above-mentioned complete test constitutes one cycle, and the surface cracks and wear degree of the test rubber track are recorded and analyzed regularly.

[0094] The frequency of the cyclic test is 1-5 cycles per day; the surface cracks include inner and outer cracks and wheel side cracks on the rubber track pattern side; the degree of wear can characterize the wear resistance of the rubber track in actual use, and the wear test includes fixed-point wear test and overall wear test.

[0095] The overall wear test is to regularly select multiple different sample positions on two test tracks of the same period, measure the rubber track pattern height corresponding to the test time period, and control the number of samples at different positions to be no less than 50% of the total number of sections of the entire rubber track, calculate the arithmetic mean of the pattern height corresponding to each test time period, and then fit and calculate the test rubber track pattern height change curve based on the arithmetic mean of the rubber track pattern height corresponding to the time period; and count the number of surface cracks on the rubber track and the growth and change of the crack length.

[0096] The fixed-point wear test is to select three evenly distributed and symmetrical positions X, Y, and Z on the rubber track as fixed-point measurement sample positions, and mark the corresponding positions. The test duration is recorded daily, and the pattern height corresponding to the sample position and the test duration is measured and the arithmetic mean is calculated. The actual pattern height change curve is drawn according to the test duration and the arithmetic mean corresponding to it, which is used to evaluate the accuracy, predictive ability and trend consistency of the pattern height change fitting curve of the overall wear test. Specifically, the three positions X, Y, and Z include the inner side and the outer side of the rubber track, and the measured values ​​are based on the position of the center point 6 of the pattern groove on the inner side and the outer side of the rubber track corresponding to the three positions X, Y, and Z of the rubber track as the measurement reference point.

[0097] 1. Overall wear test,

[0098] (1) Testing the pattern height after 250.3 hours, that is, the engineering rubber track JLLA prepared by the inventor's company according to the above-mentioned component composition and preparation method, according to the above-mentioned scenario test method steps, terminate the test after 250.3 hours of test operation, and measure data at the inner and outer points of the sample positions at 28 different positions of the test object rubber track.

[0099] Table 1. Rubber track tread height after 250.3h JLLA test

[0100]

[0101] Note: The above table shows the pattern height data after the test as follows: Figure 7 , 8As shown, the position of the center point 6 of the tread groove 1 on the rubber track 5, and the center point 6 of the tread groove 1 on the rubber track 5 are the data values ​​of the center point 6 of the tread groove 1 on the inner side 2 and the outer side 3 of the rubber track 5; the pattern height after the test represents the height value of the center point 6 of the tread groove 1 on the rubber track after 250.3 hours of scene testing, such as Figure 8 shown.

[0102] The row of positions in the above table indicates the locations of the selected test object rubber track samples, the number of which shall not be less than 50% of the entire track sections.

[0103] Table 2. Overall wear test pattern height change - JLLA

[0104]

[0105] Note: Table 2 above is an overall wear test using the above-mentioned engineering rubber crawler performance scenario test method of the present invention, which characterizes the periodic decline trend and decline ratio of the pattern height at 2 inner sides and 3 outer sides of 28 different sample positions of the above-mentioned JLLA rubber crawler. Note: After about 250.3 hours of scenario performance testing, the rubber crawler pattern height: the inner side is reduced by an average of 4.28mm, and the decline ratio is 17.14%; the outer side is reduced by 2.88mm, and the decline ratio is 11.52%. The overall pattern height is reduced by an average of 3.58mm, and the decline ratio is 14.33%.

[0106] (2) Surface crack test, i.e., statistics of surface cracks after 250.3 hours of testing according to the engineering rubber track performance scenario testing method of the present invention.

[0107] Table 3. Statistics of surface cracks after testing

[0108]

[0109]

[0110] Note: ① The data in Table 3 above only count the cracks with a length of more than 10 mm, and the "×" in the table represents all cracks on the entire tread surface or the entire wheel side of the sample position;

[0111] ②. Number of surface cracks: 17 on the inner side of the tread surface, 16 on the outer side, a total of 33; 7 on the wheel side. This means that the total number of cracks on the inner and outer sides of the tread surface and the number of cracks on the wheel side is 40.

[0112] It can be seen from the above data that the rubber track product prepared according to the above component composition ratio in this embodiment has excellent wear resistance.

[0113] 2. Fixed-point wear test,

[0114] The fixed-point wear test is to select three evenly distributed and symmetrical X, Y, and Z positions on the rubber track of the test object, measure the height of the tread groove for three consecutive measurements, take the median, and then use the arithmetic mean of the measurement data at the three positions X, Y, and Z to obtain the actual tread height change curve. The measurement time interval is once a day, and the daily running time is 6-10 hours, that is, the actual tread height is recorded every 6-10 hours or so to represent the actual wear trend.

[0115] The test cycle is 28 days, that is, the data obtained in 250.3 hours for the above operation test for 28 days is used for explanation; as shown in Table 4 below,

[0116]

[0117]

[0118] It is noted that the above data are obtained through fixed-point wear tests within the above-mentioned operation test duration, and the actual pattern height change trend curve represented by the data is used to evaluate the accuracy, predictive ability and trend consistency between data of the pattern height change fitting curve of the overall wear test.

[0119] From the above data and instructions Fig.10 , 11 It can be seen that the data deviation between the actual pattern height change curve of the fixed-point wear test in this embodiment 1 and the pattern height change fitting curve of the overall wear test is small, and the completion degree of the overall measurement process is within a controllable range.

[0120] Example 2

[0121] The engineering rubber track prepared by the inventor's company used in this embodiment is code-named: Rubber Track JLLB, and its main components are: 100 parts of natural rubber, 50-80 parts of carbon black, 1-3 parts of sulfur, 1-1.3 parts of accelerator, etc. All components involved in the specific embodiment can be obtained from the market and prepared according to the product preparation method of the inventor's company. This embodiment 2 is tested at the same time as the above-mentioned embodiment 1, and the specific implementation method is the same as that of embodiment 1.

[0122] 1. Overall wear test,

[0123] (1) The pattern height after 250.3 hours of testing, that is, the engineering rubber track JLLB prepared by the inventor's company according to the above-mentioned component composition and preparation method, according to the above-mentioned scenario test method steps, terminated the test after 250.3 hours of test operation, and measured data at the inner and outer points of the sample positions at 28 different positions of the test object rubber track.

[0124] Table 5. Rubber track tread height after 250.3h JLLB test.

[0125]

[0126] Note that the pattern height data after the test shown in Table 5 above is as follows Figure 7 , 8 As shown, the position of the center point 6 of the tread groove 1 on the rubber track 5, and the center point 6 of the tread groove 1 on the rubber track 5 are the data values ​​of the center point 6 of the tread groove 1 on the inner side 2 and the outer side 3 of the rubber track 5; the pattern height after the test represents the height value of the center point 6 of the tread groove 1 on the rubber track after 250.3 hours of scene testing, such as Figure 8 shown.

[0127] The row of positions in Table 5 above indicates the locations of the selected test object rubber track samples, the number of which is not less than 50% of the number of sections of the entire track.

[0128] Table 6. Change in tread height of overall wear test - JLLB

[0129]

[0130] Note: Table 6 above is an overall wear test using the above-mentioned engineering rubber crawler performance scenario test method of the present invention, which characterizes the periodic decline trend and decline ratio of the pattern height at the inner side 2 and outer side 3 of the 28 different sample positions of the above-mentioned JLLB rubber crawler. Note: After about 250.3 hours of scenario performance testing, the rubber crawler pattern height: the inner side is reduced by an average of 5.28mm, the decline ratio is 21.12%; the outer side is reduced by 4.41mm, the decline ratio is 17.64%, and the overall pattern height is reduced by an average of 4.85mm, the decline ratio is 19.38%.

[0131] (2) Surface crack test, i.e., statistics of surface cracks after 250.3 hours of testing according to the engineering rubber track performance scenario testing method of the present invention.

[0132] Table 7. Statistics of surface cracks after testing.

[0133]

[0134]

[0135] Note: ① The data in Table 7 above only count the cracks with a length of more than 10 mm, and the "×" in the table represents all cracks on the entire tread surface or the entire wheel side of the sample position;

[0136] ②. Number of surface cracks: 17 on the inner side of the tread surface, 18 on the outer side, a total of 35; 9 on the wheel side. This means that the total number of cracks on the inner and outer sides of the tread surface and the number of cracks on the wheel side is 44.

[0137] From the above data, it can be seen that the rubber track product prepared according to the above component composition ratio in Example 2 is inferior to Example 1 in terms of wear resistance and crack resistance.

[0138] 2. Fixed-point wear test,

[0139] The fixed-point wear test is to select three evenly distributed and symmetrical X, Y, and Z positions on the rubber track of the test object, measure the height of the tread groove for three consecutive measurements, take the median, and then use the arithmetic mean of the measurement data at the three positions X, Y, and Z to obtain the actual tread height change curve. The measurement time interval is once a day, and the daily running time is 6-10 hours, that is, the actual tread height is recorded every 6-10 hours or so to represent the actual wear trend.

[0140] The test period is 28 days, that is, the data obtained by the above operation test for 28 days is used for explanation; as shown in Table 8 below,

[0141]

[0142]

[0143] It is noted that the above data are obtained through fixed-point wear tests within the above-mentioned operation test duration, and the actual pattern height change trend curve represented by the data is used to evaluate the accuracy, predictive ability and trend consistency between data of the pattern height change fitting curve of the overall wear test.

[0144] From the above data and the attached drawings Fig.12 , 13 It can be seen that the data deviation between the actual pattern height change curve of the fixed-point wear test in this embodiment 2 and the pattern height change fitting curve of the overall wear test is small, and the completion degree of the overall measurement process is within a controllable range.

[0145] Note that the testing methods for the performance parameters in the above-mentioned test reports can be carried out in accordance with relevant national standards or industry standards. It can be seen from the above-mentioned test data that the engineering rubber track performance scenario testing method disclosed in the present invention truly simulates the actual working environment of engineering machinery, so as to more accurately evaluate or predict the performance of the product. The rubber tracks are subjected to long-term, high-intensity testing in the scenario environment of the present invention to obtain more comprehensive and in-depth data in order to accurately evaluate the performance of the rubber tracks under various complex working conditions. This will help to better understand the characteristics of rubber tracks and provide more accurate and reliable data support for optimizing the design, manufacture and use of rubber tracks.

Claims

1. A method for testing the performance of engineering rubber tracks in scenarios, taking engineering machinery rubber tracks as the test object, installing the rubber tracks on engineering machinery devices, and testing the rubber tracks on working scene roads with different terrains, slopes, and softness and hardness, simulating various walking routes, operations, and driving behaviors; the method is characterized by: The method comprises the following steps: subjecting an engineering machine equipped with a rubber track of a test object to the following cycle test under the following different terrain, slope and soft and hard road conditions, wherein each cycle test completes all operations of each route in the order of routes A, B, C, D and E; Route A: Control one rubber track on the construction machinery to remain stationary in a "Ꝏ" shape and move one circle clockwise; at the same time, control the other track to remain stationary and move one circle counterclockwise; one complete "Ꝏ" shape circle is counted as 1 time; Route B consists of four parts: B1, B2:, B3, B4:, among which: B1: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track to move one circle in clockwise direction; B2: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track to move one circle in the counterclockwise direction; B3: Control one rubber track on the engineering machinery to remain stationary, and the other rubber track is operated to rotate one circle in the clockwise direction. Then, control one rubber track on the engineering machinery to remain stationary, and the other rubber track is operated to rotate one circle in the counterclockwise direction. The clockwise rotation and the counterclockwise rotation are completed as one time; B4: Control the two rubber crawlers on the construction machinery to move and rotate simultaneously. The specific operation is that one crawler rotates forward and the other crawler rotates reversely. The control operation rotates counterclockwise for one circle and then immediately rotates clockwise for one circle, which is one time; Route C: Set the test road route to a "W"-shaped curve, control the two rubber tracks on the construction machinery to move simultaneously, and complete the back and forth movement along the "W"-shaped curve route, which is 1 time; Route D: Set the test road route to a right-angle "W"-shaped zigzag curve with a turning angle of 88-92°; control the two rubber tracks on the engineering machinery to move simultaneously and complete a back-and-forth walk along the right-angle "W"-shaped zigzag curve route, which is 1 time; Route E: Set the test road route as a straight line, and walk uphill when coming and downhill when returning. Control the two rubber tracks on the construction machinery to move at the same time, and complete the round trip as one time; After completing the above-mentioned complete cycle test, the surface cracks and wear degree of the test rubber track are recorded and analyzed.

2. According to claim 1, a method for testing the performance of engineering rubber tracks in scenarios, characterized in that: The frequency of the cyclic test is 1-5 cycles per day; the surface cracks include inner and outer cracks and wheel side cracks on the rubber track pattern side; the degree of wear represents the wear resistance of the rubber track in actual use, and the wear degree test includes fixed-point wear test and overall wear test.

3. The method for testing the performance of an engineering rubber track according to claim 1, characterized in that: The cycle test is a cycle test for each time, wherein, route A, is repeated 8-12 times; route B, wherein, B1, B2:, are repeated 8-12 times respectively, B3, B4: are repeated 8-12 times respectively, and the rotation and walking are repeated 8-12 times respectively; route C, route D, route E are repeated 8-12 times respectively.

4. A method for testing the performance of an engineering rubber track according to claim 1 or 3, characterized in that: Control each cycle test to complete the test time of each route in the order of routes A, B, C, D, and E. Route A accounts for 10-25% of the total test time, route B accounts for 50-55% of the total test time, and routes C, D, and E account for 30-35% of the total test time.

5. According to the method for testing the performance of engineering rubber tracks in scenarios described in claim 1, the characteristics are as follows: C. The turning angle of the "W"-shaped curve is controlled at 120-130°; the turning angle of the right-angle "W"-shaped zigzag curve on route D is controlled at 88-92°.

6. The method for testing the performance of an engineering rubber track according to claim 2, characterized in that: The overall wear test is to measure the groove height of the rubber track before and after wear, and calculate the wear change rate of the groove height of the test object rubber track; it is to select different rubber tracks at multiple different positions to measure their pattern height, calculate the average value, and control the number of samples at different positions of different rubber tracks to be no less than 50% of the number of sections of the entire rubber track to calculate the average value.

7. The method for testing the performance of an engineering rubber track according to claim 2, characterized in that: The fixed-point wear test is to select three evenly distributed and symmetrical X, Y, and Z positions on the rubber track as the fixed-point wear measurement sample positions, and mark the corresponding positions; record the test duration every day, measure the pattern height corresponding to the sample position and the test duration, and calculate the arithmetic mean. Draw the actual pattern height change curve based on the test duration and its corresponding arithmetic mean, which is used to evaluate the accuracy, predictive ability and trend consistency of the pattern height change fitting curve of the overall wear test.

8. The method for testing the performance of engineering rubber tracks in scenarios according to claim 7 is characterized in that: The three positions X, Y, and Z include the inner side and the outer side of the rubber track. The measurement values ​​are based on the center points of the tread grooves on the inner side and the outer side of the rubber track corresponding to the three positions X, Y, and Z of the rubber track as the measurement reference points.

9. The method for testing the performance of engineering rubber tracks according to claim 1, characterized in that: Control any two test rubber tracks of the test object to be tested. During each cycle test, when all operations of each route are completed in the order of routes A, B, C, D, and E, the test operation time of each corresponding route is relatively equal.

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