Carriage side plate structure of unmanned mining truck and design method

Abstract

The invention discloses an unmanned mining truck carriage side plate structure and a design method, and the method comprises the steps: S1, designing a carriage of an unmanned mining truck through three-dimensional modeling software, importing a three-dimensional design model of the unmanned mining truck into simulation analysis software, and carrying out the stress analysis; s2, dividing the image into a grid form by using a mesh function; s3, inputting material attributes of the structural grids; s4, simulating the working condition of the unmanned mining truck in the actual transportation of the mine; s5, inputting the pressure numerical value into simulation analysis software for calculation; and S6, the stress size and the distribution result of the carriage structure are obtained, and the structure of the corresponding part of the side plate structure is improved according to the stress size and the distribution result. According to the design method, the stress distribution of the cargo loading state is simulated, so that the stress point and the non-stress point can be determined, proper reinforcement can be accurately carried out at the position where the strength of the carriage is weak, and a weight reduction scheme can be accurately carried out at the position where the strength is excessive.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned mining trucks, and in particular to a side panel structure of an unmanned mining truck compartment and a design method thereof. Background Art

[0002] In the modern mining and transportation process, the strength of the mining truck compartment is an important factor affecting transportation safety and service life. Therefore, the reasonable design of the compartment strength of the unmanned mining truck is crucial. In the mining area, unmanned mining trucks are responsible for transporting ore and other materials; however, due to the high density of ore materials and the heavy weight per unit volume, the compartment will be squeezed by the heavy load during transportation, which can easily cause its deformation and cracking, seriously affecting the service life of the unmanned mining truck, reducing transportation efficiency, increasing economic costs, and also posing a greater safety risk; and the unmanned mining trucks currently on the market will also strengthen the compartment, but without targeted structural reinforcement, it may not necessarily play a role in enhancing the strength of the cargo compartment. On the contrary, it may increase the weight of the compartment, increase the manufacturing cost of the unmanned mining truck cargo compartment, and reduce the load capacity of the unmanned cargo compartment.

[0003] Therefore, based on the above technical problems, technicians in this field urgently need to develop a side panel structure and design method for an unmanned mining truck compartment. Summary of the invention

[0004] The purpose of the present invention is to provide a side panel structure and design method for an unmanned mining truck compartment. The three-dimensional model of the mining truck compartment is simulated by simulation analysis software, and force separation is performed to obtain the weak strength and excess strength parts of the compartment, so as to strengthen or reduce the weight of different positions of the compartment side panels in a more targeted manner, so that the strength coefficient of each position of the entire compartment reaches above the safe value and reduces the design with excess strength.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a method for designing a side plate structure of an unmanned mining truck compartment, the method mainly comprising the following steps:

[0007] Step S1, using 3D modeling software to design a carriage of an unmanned mining truck, and importing the 3D design model of the unmanned mining truck into simulation analysis software to perform a force analysis;

[0008] Step S2, simplifying the three-dimensional model of the structure in the simulation analysis software, and deleting the parts that have no effect on the structural strength. Except for the grooves that are convenient for welding in reality, the material properties of the welding parts between the car body panels remain unchanged, and the mesh function is used to divide them into a grid form;

[0009] Step S3, inputting the material properties of the structural grid obtained in step S2, wherein the parameters in the material properties include: material density, Poisson's ratio, Young's modulus, yield strength and tensile strength;

[0010] Step S4, simulating the working condition of the unmanned mining truck in actual transportation in the mine;

[0011] Step S5, loading cargo under the working condition of step S4 will generate a pressure value on the side plate structure, and the value is input into the simulation analysis software for calculation;

[0012] Step S6: After calculation by the simulation analysis software, the stress magnitude and distribution results of the car body structure are obtained, and the structure of the corresponding part of the side panel structure is improved according to the stress magnitude and distribution results.

[0013] Furthermore, in step S6, the principle of improving the structure of the corresponding part of the side plate structure is:

[0014] Reduce structural weight at locations with less stress;

[0015] Strengthen the structure at locations with greater stress.

[0016] The present invention also discloses a side plate structure of an unmanned mining truck compartment, the side plate structure comprising:

[0017] Multiple long cross beams and multiple longitudinal beams;

[0018] The plurality of long beams are divided into a bottom beam, a middle beam and a top beam;

[0019] The longitudinal beams are five longitudinal beams, and the five longitudinal beams are arranged between corresponding transverse beams at intervals;

[0020] The distance between the bottom cross beam and the middle cross beam is not equal to the distance between the middle cross beam and the top cross beam, and the arrangement position of the long cross beam is determined according to the above-mentioned design method.

[0021] Furthermore, the five longitudinal beams are divided into four short longitudinal beams and one long longitudinal beam;

[0022] The four short longitudinal beams are arranged at intervals between the bottom cross beam and the middle cross beam;

[0023] One of the long longitudinal beams is connected between the bottom beam and the top beam.

[0024] In the above technical solution, the design method of the side panel structure of an unmanned mining truck provided by the present invention has the following beneficial effects:

[0025] The design method of the present invention is based on three-dimensional modeling software and simulation analysis software. After simplifying the car model, the stress distribution of the loading state is simulated, and the force analysis structure is obtained. Therefore, the stress points and non-stress points can be clearly identified, and appropriate reinforcement can be carried out in the places where the strength of the car is relatively weak and weight reduction solutions can be implemented in the places where the strength is excessive.

[0026] The design method of the present invention and the carriage side panel structure designed by the design method enable the strength coefficient of each position of the entire carriage to reach above the safe value and reduce the design with excessive strength.

[0027] The design method of the present invention can ensure the strength of the carriage, reduce safety risks, and improve the operating efficiency to a certain extent; it can achieve lightweight structure within the allowable range of the safety factor, reduce redundant structures, and reduce the manufacturing cost of the unmanned mining truck. The unmanned mining truck carriage is designed to be as lightweight as possible, which reduces its deadweight and thus increases its load-bearing capacity, thereby increasing the transportation volume of the unmanned mining truck in a single operation.

[0028] The design method of the present invention reduces the number of welding times, shortens the total welding process time, and improves manufacturing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a structural schematic diagram of a carriage side panel structure in the prior art;

[0031] Figure 2 A mesh model diagram obtained by simulation analysis of a car side panel structure in the prior art;

[0032] Figure 3 The displacement cloud diagram obtained by stress analysis of the car side panel structure in the prior art;

[0033] Figure 4 A stress cloud diagram obtained by analyzing the stress of the car side panel structure in the prior art;

[0034] Figure 5 A flow chart of a side panel structure optimization scheme of a design method for a side panel structure of a carriage of an unmanned mining truck disclosed in an embodiment of the present invention;

[0035] Figure 6 A schematic structural diagram of a carriage side panel structure designed by a design method for a carriage side panel structure of an unmanned mining truck disclosed in an embodiment of the present invention;

[0036] Figure 7 A grid model diagram obtained by simulation analysis of a side panel structure of a vehicle compartment designed by a design method for a side panel structure of a vehicle compartment of an unmanned mining truck disclosed in an embodiment of the present invention;

[0037] Figure 8 A displacement cloud diagram obtained by stress analysis of a side panel structure of a vehicle compartment designed by a design method for a side panel structure of a vehicle compartment of an unmanned mining truck disclosed in an embodiment of the present invention;

[0038] Fig. 9 A stress cloud diagram obtained by stress analysis of a carriage side panel structure designed by a design method for a carriage side panel structure of an unmanned mining truck disclosed in an embodiment of the present invention.

[0039] Description of Figure Numbers:

[0040] 101, bottom crossbeam; 102, middle crossbeam; 103, top crossbeam;

[0041] 201, short longitudinal beam; 202, long longitudinal beam. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] See also Figures 5 to 9 As shown;

[0044] The present embodiment provides a method for designing a side plate structure of an unmanned mining truck compartment, the method mainly comprising the following steps:

[0045] Step S1, using 3D modeling software to design a carriage of an unmanned mining truck, and importing the 3D design model of the unmanned mining truck into simulation analysis software to perform a force analysis;

[0046] Step S2, simplifying the three-dimensional model of the structure in the simulation analysis software, and deleting parts that have no effect on the structural strength, such as lifting rings, eye pins, bolts, fenders, etc., except for the grooves that are convenient for welding in reality, the material properties of the welding parts between the car body panels remain unchanged, and the mesh function is used to divide them into a grid form, so that the simulation analysis can be carried out more conveniently and quickly when it is close enough to the actual structure of the car body;

[0047] Step S3, inputting the material properties of the structural grid obtained in step S2, wherein the parameters in the material properties include: material density, Poisson's ratio, Young's modulus, yield strength and tensile strength;

[0048] Step S4, simulating the working condition of the unmanned mining truck in the actual transportation of the mine. In this embodiment, taking the carrying of sand and gravel as an example, the density of the unmanned mining truck is 1800kg / m 3 , the dynamic load factor is set to 1.5;

[0049] Step S5, loading cargo under the working condition of step S4 will generate a pressure value on the side plate structure, and the value is input into the simulation analysis software for calculation;

[0050] Step S6: After calculation by the simulation analysis software, the stress magnitude and distribution results of the car body structure are obtained, and the structure of the corresponding part of the side panel structure is improved according to the stress magnitude and distribution results.

[0051] Among them, in step S6 of this embodiment, the principle of improving the structure of the corresponding part of the side plate structure is:

[0052] Reduce the weight of the structure at locations with less stress, thereby meeting lightweight design requirements;

[0053] The structure is strengthened at locations with greater stress, thereby increasing the structural strength at weak locations to ensure safety.

[0054] See also Figures 2 to 4 As shown, based on the stress analysis of the existing car side panel structure, referring to the displacement cloud map and stress cloud map of the existing car side panel structure, the structure has no large deformation, the stress is lower than the yield strength of the material, and the safety factor reaches 4, which is more than 2.5 times of the reference standard. Therefore, it is determined that the structural strength meets the actual requirements and there is still a margin.

[0055] See also Figures 5 to 9 As shown, the present invention also discloses a side panel structure of an unmanned mining truck compartment, the side panel structure comprising:

[0056] Multiple long cross beams and multiple longitudinal beams;

[0057] The plurality of long beams are divided into a bottom beam 101, a middle beam 102 and a top beam 103;

[0058] The longitudinal beams are five longitudinal beams, and the five longitudinal beams are arranged between the corresponding transverse beams at intervals;

[0059] The distance between the bottom crossbeam 101 and the middle crossbeam 102 is not equal to the distance between the middle crossbeam 101 and the top crossbeam 102 , and the arrangement position of the long crossbeam is determined according to the above-mentioned design method.

[0060] The five longitudinal beams are divided into four short longitudinal beams 201 and one long longitudinal beam 202;

[0061] Four short longitudinal beams 201 are arranged at intervals between the bottom cross beam 101 and the middle cross beam 102;

[0062] A long longitudinal beam 202 is connected between the bottom cross beam 101 and the top cross beam 103 .

[0063] After the design method is designed, a long crossbeam is added and located at two-thirds of the height of the side panel, that is, the middle crossbeam 102 of this embodiment, the length of the five longitudinal beams is shortened, and they are welded to the middle crossbeam 102. The short bottom crossbeam of the existing car side panel structure is replaced with a long crossbeam, that is, the bottom crossbeam 101, which is welded and fixed to each longitudinal beam. At the same time, the thickness of the side panel plate is reduced, and the weight of the entire vehicle compartment is reduced by 10%. After the above working condition calculation and analysis, the calculation results show that the displacement cloud diagram of the car compartment structure of the unmanned mining truck of this scheme and the stress cloud diagram of the unmanned mining truck structure of this scheme show that the structure has no large deformation, the stress is lower than the yield strength of the material, and the safety factor is 3, which meets the actual requirements and is reduced by 1 compared with the optimization. In addition, a long weld is added in the process and multiple short welds are reduced, which makes the welding process simpler, the number of welding times is reduced, the total welding process time is shortened, and the manufacturing efficiency is improved.

[0064] In the above technical solution, the design method of the side panel structure of an unmanned mining truck provided by the present invention has the following beneficial effects:

[0065] The design method of the present invention is based on three-dimensional modeling software and simulation analysis software. After simplifying the car model, the stress distribution of the loading state is simulated, and the force analysis structure is obtained. Therefore, the stress points and non-stress points can be clearly identified, and appropriate reinforcement can be carried out in the places where the strength of the car is relatively weak and weight reduction solutions can be implemented in the places where the strength is excessive.

[0066] The design method of the present invention and the carriage side panel structure designed by the design method enable the strength coefficient of each position of the entire carriage to reach above the safe value and reduce the design with excessive strength.

[0067] The design method of the present invention can ensure the strength of the carriage, reduce safety risks, and improve the operating efficiency to a certain extent; it can achieve lightweight structure within the allowable range of the safety factor, reduce redundant structures, and reduce the manufacturing cost of the unmanned mining truck. The unmanned mining truck carriage is designed to be as lightweight as possible, which reduces its deadweight and thus increases its load-bearing capacity, thereby increasing the transportation volume of the unmanned mining truck in a single operation.

[0068] The design method of the present invention reduces the number of welding times, shortens the total welding process time, and improves manufacturing efficiency.

[0069] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A design method for a side panel structure of an unmanned mining truck compartment, characterized in that: The method mainly includes the following steps: Step S1, using 3D modeling software to design a carriage of an unmanned mining truck, and importing the 3D design model of the unmanned mining truck into simulation analysis software to perform a force analysis; Step S2, simplifying the three-dimensional model of the structure in the simulation analysis software, and deleting the parts that have no effect on the structural strength. Except for the grooves that are convenient for welding in reality, the material properties of the welding parts between the car body panels remain unchanged, and the mesh function is used to divide them into a grid form; Step S3, inputting the material properties of the structural grid obtained in step S2, wherein the parameters in the material properties include: material density, Poisson's ratio, Young's modulus, yield strength and tensile strength; Step S4, simulating the working condition of the unmanned mining truck in actual transportation in the mine; Step S5, loading cargo under the working condition of step S4 will generate a pressure value on the side plate structure, and the value is input into the simulation analysis software for calculation; Step S6: After calculation by the simulation analysis software, the stress magnitude and distribution results of the car body structure are obtained, and the structure of the corresponding part of the side panel structure is improved according to the stress magnitude and distribution results.

2. The design method of the side panel structure of an unmanned mining truck compartment according to claim 1 is characterized in that: In step S6, the principle of improving the structure of the corresponding part of the side plate structure is: Reduce structural weight at locations with less stress; Strengthen the structure at locations with greater stress.

3. An unmanned mining truck compartment side panel structure, characterized in that: The side panel structure comprises: Multiple long cross beams and multiple longitudinal beams; The plurality of long cross beams are divided into a bottom cross beam (101), a middle cross beam (102) and a top cross beam (103); The longitudinal beams are five longitudinal beams, and the five longitudinal beams are arranged between corresponding transverse beams at intervals; The distance between the bottom crossbeam (101) and the middle crossbeam (102) is not equal to the distance between the middle crossbeam (102) and the top crossbeam (103), and the arrangement position of the long crossbeam is determined according to the design method according to claim 1 or 2.

4. The side panel structure of an unmanned mining truck compartment according to claim 3 is characterized in that: The five longitudinal beams are divided into four short longitudinal beams (201) and one long longitudinal beam (202); The four short longitudinal beams (201) are arranged at intervals between the bottom cross beam (101) and the middle cross beam (102); One of the long longitudinal beams (202) is connected between the bottom cross beam (101) and the top cross beam (102).

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