A Design Method of Hardness Field of Roller Body of Construction Machinery
A technology of construction machinery and design methods, applied in design optimization/simulation, geometric CAD, special data processing applications, etc., can solve the problems that the heat treatment design requirements of the roller body cannot be quantitatively realized, and the hardness gradient cannot be realized.
Active Publication Date: 2021-03-26
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
Such a design is a passive design based on the heat treatment characteristics of the material, rather than an active design based on the use requirements of the roller body, and cannot achieve the hardness gradient requirements
Therefore, the existing design methods for the hardness of the roller body cannot quantitatively realize the heat treatment design requirements of the roller body according to the use requirements
Method used
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Embodiment Construction
[0017] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the following embodiments will specifically illustrate the hardness field design method of the construction machinery track wheel wheel body of the present invention in conjunction with the accompanying drawings.
[0018] figure 1 It is a structural schematic diagram of a roller body in an embodiment of the present invention.
[0019] In this embodiment, take a construction machinery roller body as an example, its material is 40Mn2, the structure and size of the roller body are as follows figure 1 As shown, the roller body has a shaft portion 1 and a rim portion 2 . The wheel body of the supporting roller and the tread surface of the chain rail link contact each other to form a friction pair.
[0020] In this embodiment, the method for designing the hardness field of the roller body of construction machinery includes the following steps:
[0021] St...
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The invention provides a hardness field design method of a wheel body of an engineering machinery bearing wheel. The method comprises the following steps: step 1, determining a hardness ratio range ofthe wheel body of the bearing wheel and a track link according to contact stress characteristics of friction pair parts; step 2, according to a structure size and material characteristics of the wheel body of the bearing wheel and a bending strength requirement of a wheel rim portion of the wheel body of the bearing wheel after a wear limit, using finite-element software to carry out bending strength analysis to determine the wear limit and hardened-layer depth; step 3, determining surface hardness according to an end quenching curve of materials of the wheel body of the bearing wheel; step 4, determining core-portion hardness according to a wear resistance requirement, a fatigue resistance requirement and an impact resistance requirement of the wheel body of the bearing wheel under a working condition environment and material properties and heat processing technology of the wheel body of the bearing wheel; and step 5, determining hardness gradient distribution according to a distribution requirement of hardened-layer depth of a shaft diameter portion and the wheel rim portion of the wheel body of the bearing wheel and end quenching properties of the materials of the wheel body ofthe bearing wheel.
Description
technical field [0001] The invention relates to the field of mechanical design, in particular to a method for designing the hardness field of a roller body of a construction machinery support wheel. Background technique [0002] Construction machinery track rollers are important bearing parts of the chassis. General construction machinery track rollers include wheel bodies, end covers, main shafts, seals, sliding bearings and other parts. During the working process of the crawler chassis, micro-movement, rolling and sliding friction occur on the wheel body of the supporting wheel and the tread surface of the chain-rail joint. The wear failure of the roller body is one of the main failure modes. [0003] The wear of the wheel body of the supporting wheel mainly depends on the type of abrasive at the work site, the hardness of the working surface of the wheel body and the depth of the hardened layer. The impact load borne by the roller body can be resisted by the toughness o...
Claims
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IPC IPC(8): G06F30/17G06F30/23
CPCG06F30/17
Inventor 卢曦刘汉光田磊张红刘晓辉
Owner UNIV OF SHANGHAI FOR SCI & TECH