Loading method of pretightening force of bolts
A bolt pre-tightening force and pre-tightening force technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of difficult prediction and control, large divergence of pre-tightening force, poor stability, etc., to improve stability performance and loading accuracy, overcoming the large divergence of the preload, and avoiding the effect of the introduction of errors
Active Publication Date: 2020-07-10
NANTONG UNIVERSITY
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Problems solved by technology
[0004] In order to solve the above problems, the present invention provides a method for loading bolt pretightening force, which overcomes the problems of large pretightening force divergence, poor stability, and difficult prediction and control existing in the existing bolt assembly process, and avoids the problems of the loading process. The introduction of medium error improves the stability of the connected parts
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
[0020] This embodiment provides a loading method of bolt pretightening force, such as figure 1 As shown, it includes the following steps: S10 acquires data tables, collects tightening data of at least five test pieces through sensors, and obtains tightening data tables of torque, pretightening force and rotation angle of the test pieces. S20 draws a relationship diagram between the pretightening force and the torque, the pretightening force and the rotation angle data accordin...
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The invention provides a loading method of pretightening force of bolts. The loading method includes the following steps that S10, tightening data tables are obtained, wherein sensors are used for acquiring tightening data of at least five test pieces, and the tightening data tables of the torque, the pretightening force and the rotating angles of the test pieces are obtained; S20, the linear relation between all the data is obtained, wherein a relation graph of the pretightening force and the data of the torque, the pretightening force and the rotating angles is drawn according to the data tables, and the linear relation between all the data is obtained; S30, the real linear relation K' of the pretightening force and the torque is obtained according to the linear relation and site tightening data, and the target torque T is obtained according to the formula T=K'F'+Tp; and S40, the bolts or nuts are loaded to the target torque T, and then the pretightening force is loaded. According tothe loading method of the pretightening force of the bolts, the problems that the divergence of the pretightening force is large, the stability is poor, and the prediction and control difficulty is high in the existing bolt assembly process are solved, introduction of errors in the loading process is avoided, and the stability after connected parts are connected is improved.
Description
technical field [0001] The invention relates to the technical field of bolt assembly, in particular to a method for loading bolt pretightening force. Background technique [0002] At present, two commonly used bolt loading methods in the field of bolt assembly technology are the torque method and the torque rotation angle method. Torque method, which uses the linear relationship between torque and bolt pretightening force to apply a certain torque to obtain the corresponding bolt pretightening force. This method is the most common method for loading bolts, but due to the relationship between torque and pretightening force The relationship between them is affected by friction and produces large fluctuations, and the consistency of the obtained pretightening force is poor. Torque angle method, that is, when applying a certain target pretightening force to threaded fasteners, first tighten the fasteners according to a certain target torque, and then apply a certain angular loa...
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IPC IPC(8): B23P19/06
CPCB23P19/065
Inventor 倪红军张守阳吕帅帅汪兴兴王辉赵兵
Owner NANTONG UNIVERSITY