Test method and system for dumper side plate expansion tank, dumper tank and dumper

Abstract

The present application relates to the technical field of working machine, and provides a self-unloading vehicle side plate inflation tank test method, system, tank and self-unloading vehicle, the method comprises the following steps: based on the simulation result of side plate inflation tank, stress test device is set on the side plate; based on the actual use scene of user, the test working condition is determined; the actual use scene of user includes the material shooting scene of excavator; under the test working condition, the inflation tank test of side plate is carried out by using stress test device, and the inflation tank test result is obtained; the inflation tank test result is evaluated based on the preset test acceptance standard. The method of the present application is consistent with the actual use scene of user, can effectively control the inflation tank, and avoid the problems such as tarpaulin jam, cargo tank cracking caused by inflation tank problem.

Description

Technical Field

[0001] The present invention relates to the technical field of operating machinery, and in particular to a dump truck side plate expansion test method, system, truck box and dump truck. Background Art

[0002] A dump truck is a vehicle that unloads cargo automatically through hydraulic or mechanical lifting. Also known as a tipping truck, it consists of a chassis, hydraulic lifting mechanism, cargo box, and power take-off device. Because the cargo box automatically tilts at a certain angle to unload, it significantly reduces unloading time and labor, shortens transportation cycles, improves production efficiency, and reduces transportation costs. The cargo box is constructed by welding together four major assemblies: the bottom panel, side panels, front panel, and rear panel. The degree of side panel expansion in a dump truck directly affects the proper functioning of the tarpaulin system. This expansion can also reduce the reliability of the connection between the bottom panel and side panels, posing a risk of cracking. Currently, research on side panel expansion in dump trucks is primarily based on empirical experience or computer simulations, coupled with user validation. Existing validation methods are inconsistent with actual user scenarios. For example, they are not suitable for typical excavator-assisted material handling operations. During use, the side panels of dump trucks are subject to significant lateral forces, which can lead to tarpaulin jamming and cargo box cracking. Summary of the Invention

[0003] The present invention provides a dump truck side panel expansion test method, system, truck box, and dump truck. These methods address the discrepancy between existing verification methods and actual user scenarios, resulting in potential problems with tarpaulin jamming and cargo box cracking during dump truck use. The present invention's method is consistent with actual user scenarios and can effectively control cargo box expansion, avoiding problems such as tarpaulin jamming and cargo box cracking caused by this issue.

[0004] The present invention provides a dump truck side plate expansion test method, comprising: arranging a stress testing device on the side plate based on a side plate expansion simulation result; determining a test condition based on a user's actual usage scenario; the user's actual usage scenario includes an excavator material-splitting scenario; under the test condition, using the stress testing device to perform an expansion test on the side plate to obtain an expansion test result; and evaluating the expansion test result based on a preset test acceptance standard.

[0005] According to a dump truck side panel expansion test method provided by the present invention, a stress testing device is set on the side panel based on the side panel expansion simulation results, including: loading lateral acceleration and longitudinal acceleration according to the structural material properties of the side panel, performing static strength stress analysis on the side panel expansion amount, and obtaining the maximum expansion point and the theoretical maximum expansion amount; and setting the stress testing device according to the maximum expansion point and the theoretical maximum expansion amount.

[0006] According to a dump truck side panel expansion test method provided by the present invention, under the test conditions, the stress testing device is used to perform a box expansion test on the side panel to obtain a box expansion test result, including: determining initial size data of the cargo box; filling the cargo box with materials, and using an excavator to hit the materials to determine stress data measured by the stress testing device; controlling the cargo box to unload, reload and repeat the excavator hitting and unloading actions until the cargo box is empty; and determining the side panel expansion amount based on the initial size data and the size data of the empty cargo box.

[0007] According to a dump truck side panel expansion test method provided by the present invention, the preset test acceptance criteria include: the stress data should be less than or equal to 0.7 times the material yield strength or weld strength; during the test, the side panel should not have weld opening and / or cracking problems; the side panel expansion amount should be less than or equal to 10 mm.

[0008] The present invention also provides a dump truck side plate expansion test system, including: a device setting module, used to set a stress testing device on the side plate based on the side plate expansion simulation results; a working condition determination module, used to determine the test working condition based on the user's actual usage scenario; the user's actual usage scenario includes an excavator material-splitting scenario; a testing module, used to use the stress testing device to perform an expansion test on the side plate under the test working condition to obtain the expansion test result; an evaluation module, used to evaluate the expansion test result based on a preset test acceptance standard.

[0009] The present invention also provides a cargo box, which uses the above-mentioned dump truck side plate expansion test method to perform a side plate expansion test.

[0010] The present invention also provides a dump truck comprising the above-mentioned cargo box.

[0011] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any one of the above-described dump truck side plate expansion test methods is implemented.

[0012] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for testing the side plate expansion of a dump truck as described above is implemented.

[0013] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned dump truck side plate expansion test methods.

[0014] The present invention provides a dump truck side panel expansion test method, system, truck box, and dump truck. The method includes: providing a stress testing device on the side panel based on the side panel expansion simulation results; determining the test conditions based on the user's actual usage scenario; the user's actual usage scenario includes an excavator material removal scenario; under the test conditions, using the stress testing device to perform a box expansion test on the side panel to obtain the box expansion test results; and evaluating the box expansion test results based on preset test acceptance criteria. The method of the present invention is consistent with the user's actual usage scenario and can effectively control box expansion, avoiding problems such as tarpaulin jamming and box cracking caused by box expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 The present invention is a schematic flow chart of a dump truck side plate expansion test method.

[0017] Figure 2 It is a schematic diagram of the principle of the side panel expansion box simulation analysis provided by the present invention.

[0018] Figure 3 It is a schematic diagram of the principle of the excavator material-beating test provided by the present invention.

[0019] Figure 4 It is a structural schematic diagram of the dump truck side plate expansion test system provided by the present invention.

[0020] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] With the development of national engineering construction, the demand for transportation and transshipment on highways, in construction projects, and in mines continues to grow. Dump trucks, as a vital means of transportation, have played an irreplaceable role and continue to have promising future development prospects. The dump truck bed is responsible for loading and unloading cargo. During loading, driving, and lifting and unloading, the bed is subjected to forces exerted by the cargo within. The overall strength and lifespan of the bed affect the vehicle's performance. Therefore, the bed is a key component of a dump truck. The bed is primarily constructed by welding together four assemblies: the floor, side panels, front panel, and rear panel. The degree of side panel expansion in a dump truck directly affects the proper functioning of the tarpaulin system. This expansion can also reduce the reliability of the connection between the floor and side panels, posing a risk of cracking. Currently, there are no industry-standard tests for side panel expansion. Verification is primarily based on experience or computer simulations, combined with user experience. This verification method does not align with actual customer operating conditions and fails to reflect the typical operating conditions of excavators handling materials (under these conditions, the side panels are often subjected to greater lateral forces). The actual manifestations are problems such as tarpaulin getting stuck and cargo box cracking due to expansion of the box during use.

[0023] Please refer to Figure 1 , Figure 1 The present invention provides a flow chart of the dump truck side panel expansion test method.

[0024] In order to solve the technical problems existing in the prior art, the present invention provides a dump truck side plate expansion test method based on the excavator material shooting scenario, including:

[0025] 101: Based on the simulation results of the side panel expansion, a stress testing device is set on the side panel;

[0026] 102: Determine the test conditions based on the user's actual usage scenario; the user's actual usage scenario includes the excavator material shooting scenario;

[0027] 103: Under the test conditions, a stress testing device is used to perform an expansion box test on the side plate to obtain the expansion box test results;

[0028] 104: Evaluate the expansion box test results based on the preset test acceptance criteria.

[0029] The present invention first determines the arrangement points of the stress testing device (such as each strain gauge / strain flower) based on the simulation results of the side panel expansion, and arranges corresponding pilot points for the side panel. Then, an actual investigation is conducted on the excavator material-stripping scenario, and the test conditions are determined based on the customer scenario. The test conditions are as consistent as possible with the dump truck operation scenario, such as the excavator material-stripping scenario. Afterwards, the test standards and test methods under the test conditions are established. Under the test conditions, the stress testing device is used to perform an expansion test on the side panel to obtain the expansion test results. Finally, a test acceptance standard is established, and the expansion test results are evaluated based on the test acceptance standard. The dump truck side panel expansion test method provided by the present invention is consistent with the user's actual use scenario, can effectively control the expansion, and avoid problems such as tarpaulin jamming and cargo box cracking caused by the expansion problem.

[0030] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the principle of the side panel expansion simulation analysis provided by the present invention.

[0031] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the principle of the excavator material-beating test provided by the present invention.

[0032] As a preferred embodiment, based on the simulation results of the side panel expansion, a stress testing device is set on the side panel, including: loading lateral acceleration and longitudinal acceleration according to the structural material properties of the side panel, performing static strength stress analysis on the side panel expansion amount, and obtaining the maximum expansion point and the theoretical maximum expansion amount; setting a stress testing device according to the maximum expansion point and the theoretical maximum expansion amount.

[0033] In this example, static strength stress analysis of the side panels was performed under dynamic load, steering, braking, and counter-lift conditions, applying lateral and longitudinal accelerations based on the structural material properties of the side panels. The maximum expansion point and theoretical maximum expansion amount were determined based on simulation analysis, and strain gauge / rosetted placement was determined based on these maximum expansion points and theoretical maximum expansion amounts.

[0034] Strain gauges, also known as strain gauges, are metallic electrical measuring elements that accurately measure force, load, torque, and other parameters in static environments. Their operating principle is based on the strain effect: when a conductor or semiconductor material mechanically deforms under an external force, its resistance changes accordingly. A strain gauge, consisting of a sensitive grid and other components used to measure strain, is securely affixed to the measuring point of a component. When the component is subjected to force, the strain at the measuring point causes the sensitive grid to deform, causing a change in resistance. This resistance change is then measured by a specialized instrument and converted into the strain value at the measuring point. There are many types of strain gauges, such as a thin metal foil sensitive grid (3-6µm) attached to a base plastic film (15-16µm), which is then covered with another layer of film to create a laminated structure. Strain gauges effectively utilize the physical and geometric properties of conductors. When a conductor is stretched within its elastic limit, it becomes narrower and longer without breaking or permanently deforming. This deformation increases the resistance at its terminals. Conversely, when a conductor is compressed, it becomes wider and shorter, which reduces the resistance at its terminals. By measuring the resistance of a strain gauge, the strain in the area it covers can be calculated. The strain gauge's sensitive grid is a narrow conductor arranged in a zigzag pattern of parallel wires. This arrangement accumulates small deformations in the baseline direction to form a larger cumulative resistance change. A strain gauge only measures the deformation of the area it covers, and sufficiently small strain gauges can be used in stress analysis.

[0035] A strain gauge rosette is a resistance strain gauge with two or more sensitive grids in different axial directions. It is used to determine the magnitude and direction of the principal strain in a plane stress field. The sensitive grids are made of metal wire or metal foil, which is called a wire strain gauge rosette.

[0036] Static strength stress analysis, often referred to as strength analysis, studies a structure's ability to withstand loads at room temperature. Besides load-bearing capacity, static strength also includes the structure's ability to resist deformation (stiffness) and its response under load (stress distribution, deformation shape, buckling modes, etc.).

[0037] As a preferred embodiment, under test conditions, a stress testing device is used to perform a box expansion test on the side panels to obtain box expansion test results, including: determining the initial size data of the cargo box; filling the cargo box with materials, and using an excavator to hit the materials to determine the stress data measured by the stress testing device; controlling the unloading of the cargo box, and repeating the excavator hitting and unloading actions until the cargo box is empty; and determining the side panel expansion amount based on the initial size data and the size data of the empty cargo box.

[0038] In this embodiment, we conducted research on the excavator material-splitting conditions that occur during dump truck operation and simulated the actual excavator material-splitting operating conditions. We then conducted an excavator material-splitting test under the test conditions. The specific steps are as follows:

[0039] (1) According to the maximum box expansion point obtained by simulation analysis, in the excavator material-beating test, strain gauges (≥6 pieces) are glued to the front, middle and rear positions of the upper outer edge of the cargo box side panel.

[0040] (2) Measure the inner width of the front, middle and rear of the cargo box and record the initial size data of the cargo box before shooting.

[0041] (3) Fill the cargo box with earth to a height that exceeds the inner height of the cargo box by 300±50mm.

[0042] (4) Use an excavator to hit the material (using an oil pressure equivalent to 5 tons) to compact it until the material level is flush with the inside of the cargo box. Record the stress (stress data) on the strain gauges of the cargo box side panels and bottom panel.

[0043] (5) Control the cargo box to unload and reload.

[0044] (6) Repeat tamping and unloading 2000 times.

[0045] (7) Measure the inner width of the front, middle and rear of the cargo box when it is empty to obtain the empty cargo box size data. Compare the empty cargo box size data with the initial cargo box size data to obtain the amount of side panel expansion.

[0046] As a preferred embodiment, the preset test acceptance standards include: the stress data should be less than or equal to 0.7 times the material yield strength or weld strength; during the test, the side panels should not have weld opening and / or cracking problems; the side panel expansion amount should be less than or equal to 10mm.

[0047] Yield strength is the yield limit of metal materials when yielding occurs, that is, the stress that resists slight plastic deformation.

[0048] Weld strength = (weld sheet thickness × weld depth) / 2 During the welding process, the strength of the weld is very important because it determines the structural safety and reliability of the welded structure.

[0049] The following describes a dump truck side plate expansion test system provided by the present invention. The dump truck side plate expansion test system described below and the dump truck side plate expansion test method described above can be referenced to each other.

[0050] Please refer to Figure 4 , Figure 4 This is a structural schematic diagram of the dump truck side plate expansion test system provided by the present invention.

[0051] The present invention also provides a dump truck side plate expansion test system, including: a device setting module 1, used to set a stress testing device on the side plate based on the side plate expansion simulation results; a working condition determination module 2, used to determine the test working condition based on the user's actual usage scenario; the user's actual usage scenario includes the excavator material shooting scene; a testing module 3, used to use the stress testing device to perform an expansion test on the side plate under the test working condition to obtain the expansion test result; an evaluation module 4, used to evaluate the expansion test result based on the preset test acceptance standard.

[0052] As a preferred embodiment, the device setting module 1 is specifically used to: perform static strength stress analysis on the side panel according to the structural material properties of the side panel to obtain lateral acceleration and longitudinal acceleration; analyze the maximum expansion point according to the lateral acceleration and longitudinal acceleration, and set a stress testing device according to the maximum expansion point.

[0053] As a preferred embodiment, the test module 3 is specifically used to: determine the initial size data of the cargo box; fill the cargo box with materials, and use an excavator to hit the materials to determine the stress data measured by the stress testing device; control the unloading of the cargo box, and repeat the actions of the excavator hitting and unloading until the cargo box is empty; determine the deformation of the side panel based on the initial size data and the size data of the empty cargo box.

[0054] As a preferred embodiment, the preset test acceptance criteria include: the stress data should be less than or equal to 0.7 times the material yield strength or weld strength; during the test, the side panels should not have weld opening and / or cracking problems; the side panel deformation should be less than or equal to 10 mm.

[0055] The cargo box provided by the present invention is described below. The cargo box described below and the dump truck side plate expansion test method described above can be referenced to each other.

[0056] The present invention also provides a cargo box, which uses the above-mentioned dump truck side plate expansion test method to perform a side plate expansion test.

[0057] The dump truck provided by the present invention is described below. The dump truck described below and the dump truck side plate expansion test method described above can be referenced to each other.

[0058] The present invention also provides a dump truck comprising the above-mentioned cargo box.

[0059] Figure 5 An example of a physical structure diagram of an electronic device is shown below. Figure 5As shown, the electronic device may include: a processor 510, a communications interface 520, a memory 530, and a communications bus 540, wherein the processor 510, the communications interface 520, and the memory 530 communicate with each other via the communications bus 540. The processor 510 may call logic instructions in the memory 530 to execute a dump truck side panel expansion test method, which includes: providing a stress testing device on the side panel based on the side panel expansion simulation results; determining a test condition based on the user's actual usage scenario, which may include an excavator material removal scenario; performing an expansion test on the side panel using the stress testing device under the test condition to obtain the expansion test results; and evaluating the expansion test results based on preset test acceptance criteria.

[0060] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0061] On the other hand, the present invention also provides a computer program product, which includes a computer program, and the computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the dump truck side plate expansion test method provided by the above methods, and the method includes: setting a stress testing device on the side plate based on the side plate expansion simulation results; determining the test conditions based on the user's actual usage scenario; the user's actual usage scenario includes the excavator material shooting scenario; under the test conditions, using a stress testing device to perform an expansion test on the side plate to obtain the expansion test results; and evaluating the expansion test results based on preset test acceptance standards.

[0062] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the dump truck side plate expansion test method provided by the above-mentioned methods. The method includes: setting a stress testing device on the side plate based on the side plate expansion simulation results; determining the test conditions based on the user's actual usage scenario; the user's actual usage scenario includes the excavator material shooting scenario; under the test conditions, using the stress testing device to perform an expansion test on the side plate to obtain the expansion test results; and evaluating the expansion test results based on preset test acceptance standards.

[0063] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0064] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dump truck side plate expansion test method, characterized in that: include: Based on the simulation results of the side panel expansion box, a stress testing device is set up on the side panel; Determine the test conditions based on the user's actual usage scenarios; The actual usage scenario of the user includes the excavator shooting scene; Under the test conditions, the stress testing device is used to perform an expansion box test on the side panel to obtain an expansion box test result; Evaluate the expansion box test results based on preset test acceptance criteria; The stress testing device is provided on the side panel based on the simulation results of the side panel expansion, including: According to the structural material properties of the side panels, lateral acceleration and longitudinal acceleration are applied to perform static strength stress analysis on the expansion of the side panels to obtain the maximum expansion point and the theoretical maximum expansion amount; Setting the stress testing device according to the maximum box expansion point and the theoretical maximum box expansion amount; Under the test conditions, the stress testing device is used to perform a box expansion test on the side panel to obtain a box expansion test result, including: Determine the initial size data of the cargo box; Filling the cargo box with materials and hitting the materials with an excavator to determine stress data measured by the stress testing device; Controlling the cargo box to unload, reload and repeat the excavator's slapping and unloading actions until the cargo box is empty; The expansion amount of the side panels is determined according to the initial dimension data and the dimension data of the empty cargo box.

2. The dump truck side plate expansion test method according to claim 1, characterized in that: The preset test acceptance criteria include: The stress data should be less than or equal to 0.7 times the material yield strength or weld strength; During the test, the side panels should not experience weld opening and / or cracking; The side panel expansion should be less than or equal to 10mm.

3. A dump truck side plate expansion test system, characterized in that: include: A device setting module is used to set a stress testing device on the side panel based on the simulation results of the side panel expansion box; The working condition determination module is used to determine the test working condition based on the user's actual usage scenario; The actual usage scenario of the user includes the excavator shooting scene; A testing module, configured to perform a box expansion test on the side panel using the stress testing device under the test conditions to obtain a box expansion test result; An evaluation module, configured to evaluate the expansion box test results based on preset test acceptance criteria; The stress testing device is provided on the side panel based on the simulation results of the side panel expansion, including: According to the structural material properties of the side panels, lateral acceleration and longitudinal acceleration are applied to perform static strength stress analysis on the expansion of the side panels to obtain the maximum expansion point and the theoretical maximum expansion amount; Setting the stress testing device according to the maximum box expansion point and the theoretical maximum box expansion amount; Under the test conditions, the stress testing device is used to perform a box expansion test on the side panel to obtain a box expansion test result, including: Determine the initial size data of the cargo box; Filling the cargo box with materials and hitting the materials with an excavator to determine stress data measured by the stress testing device; Controlling the cargo box to unload, reload and repeat the excavator's slapping and unloading actions until the cargo box is empty; The expansion amount of the side panels is determined according to the initial dimension data and the dimension data of the empty cargo box.

4. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the dump truck side plate expansion test method according to any one of claims 1 to 2 is implemented.

5. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the dump truck side plate expansion test method according to any one of claims 1 to 2 is implemented.

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