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Threaded fastener design method and system

A technology of threaded fasteners and design methods, applied in the directions of threaded fasteners, design optimization/simulation, screws, etc., can solve the problem of high risk of loosening, and achieve the effects of high design efficiency, reduced discreteness, and strong practicability

Active Publication Date: 2021-05-07
JIANGLING MOTORS
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  • Application Information

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Problems solved by technology

[0004] For this reason, an object of the present invention is to propose a method for designing threaded fasteners to solve the problem of high risk of loosening in the prior art

Method used

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  • Threaded fastener design method and system
  • Threaded fastener design method and system
  • Threaded fastener design method and system

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] see figure 1 , the threaded fastener design method proposed by the first embodiment of the present invention includes steps S101-S103.

[0039] S101, calculate the threaded fastener model, extract the external load of the connecting station through CAE, and preliminarily select the type of the threaded fastener through the external lo...

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Abstract

The invention discloses a threaded fastener design method and system, and the method comprises the steps: carrying out the calculation of a threaded fastener model, extracting the external load of a connection station through CAE, and preliminarily selecting the model of a threaded fastener through the external load; carrying out dynamic torque / clamping force and corner destructive experiments on the threaded fastener of the selected model, wherein it is tested that the surface treatment, the part size, the machining method and the assembly relation state of the threaded fastener are consistent with the loading part state; and according to experimental data, analyzing the yield point torque and the fitting torque on the test curve to obtain the installation torque or the torque + corner process. According to the method, the model selection of the threaded fastener is carried out from the stress load, then the torque / clamping force + rotation angle test is carried out through the tool state part, so that the reasonable installation torque is formulated, and the loosening risk is reduced through theoretical calculation pre-judgment and actual part test forward design.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for designing threaded fasteners. Background technique [0002] Threaded fastener connection is the most extensive connection process for auto parts. There are about 3,000 bolts and nuts in the assembly of a complete vehicle, of which there are about 200 CC and SC screw connection installation points with key important characteristics. Therefore, a reasonable threaded fastener design is very important. [0003] At present, the design of threaded fasteners is mainly based on benchmarking with reference to competing models or original models, performing part / system bench tests, and then performing road test durability verification, repeated verification, and adjustment to determine the final installation torque. This is prone to the problem of over-design or under-design of threaded fasteners, increasing the risk factor of loosening. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20F16B35/00G06F119/14
CPCG06F30/17G06F30/20F16B35/00G06F2119/14
Inventor 张小红钟球张亚舫丁阚俊杰侯聚英
Owner JIANGLING MOTORS
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