A test device and method suitable for thread missing teeth fatigue of threaded connectors
A technology of threaded connectors and test devices, which is applied in the field of fatigue tests, can solve problems such as lack of teeth in the threaded connectors that cannot be studied, and achieve the effect of ingenious design and simple and convenient operation
Active Publication Date: 2020-10-02
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a test device and method suitable for thread missing tooth fatigue of threaded connectors. By designing the test device to prefabricate thread missing teeth and proposing a corresponding threaded connector fatigue test method, the existing fatigue The test cannot study the problem of thread missing teeth of threaded connectors
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[0030] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0031] see Figure 1 to Figure 4 , this embodiment provides a test device suitable for thread missing tooth fatigue of threaded connectors. The designed test device prefabricates thread missing teeth and proposes a corresponding threaded connector fatigue test method, which solves the problem that existing fatigue tests cannot study threaded connections. The problem of missing teeth in the thread of parts;
[0032] The test device applicable to the thread missing tooth fatigue of threaded connectors includes: a fatigue testing machine, a threaded fastener 4 and a threaded tooth prefabricated part matched with the threaded fastener 4; the threaded tooth missing The prefabricated part is only provided with symmetrical threads at the preset position, and t...
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The invention provides a testing device and method suitable for threaded tooth-missing fatigue of a threaded connecting piece. The testing device comprises a fatigue testing machine, a threaded fastener and a threaded tooth-missing prefabricated part matched with the threaded fastener. The threaded tooth-missing prefabricated part is only provided with symmetrical threads at a preset part, and thethreaded tooth-missing prefabricated part is matched with the threaded fastener through screwing to form a prefabricated threaded tooth-missing structure of the threaded connecting part; and the fatigue testing machine is used for providing a preset cyclic axial load for the prefabricated threaded tooth-missing structure of the threaded connecting piece so as to prefabricate the threaded tooth missing of the threaded fastener. The testing device is ingenious in design and simple and convenient to operate, can achieve prefabrication of thread missing teeth and carry out a thread missing toothfatigue test of a thread connecting piece on an existing fatigue test machine, and can truly reflect the fatigue performance after the thread missing teeth.
Description
technical field [0001] The invention relates to the field of fatigue test technology, in particular to a test device and method suitable for thread missing teeth fatigue of threaded connectors. Background technique [0002] In the stages of equipment manufacturing, installation and commissioning, the threaded part is more prone to damage due to factors such as processing, environmental impact, screwing operation, etc. According to engineering practice, the damage location is usually located on the upper part of the container flange, that is, the first contact between the flange and the main bolt thread Location. If the impurities in the threaded hole are not cleaned thoroughly, the damage may also be located in the middle or lower part of the container flange thread. For example, the reactor pressure vessel cannot be replaced within its service life (the main bolts can be replaced appropriately), and after the thread at the screw hole of the flange of the cylinder is damage...
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IPC IPC(8): G01N3/32G01N3/02G01N3/62
CPCG01N3/02G01N3/32G01N3/62G01N2203/0005G01N2203/0073G01N2203/0252G01N2203/0682G01N2203/0688
Inventor 李振华陆永浩韩昆封帆
Owner UNIV OF SCI & TECH BEIJING