Bolt tension value calculation ruler mechanism and use method thereof
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A technology of slide rule and tension value, which is applied to measure the direction of torque/torsion force during tightening, which can solve the problems of inconvenient observation, inconvenient dynamic adjustment of relevant parameters, inconvenient reverse calculation of preload force and stiffness value, etc. The effect of strong performance, reasonable design and convenient use
Active Publication Date: 2021-11-09
FUZHOU COLLEGE OF FOREIGN STUDIES & TRADE
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Problems solved by technology
This solution method is an abstract formula calculation, which is inconvenient to observe the dynamic law of mutual influence between parameters, and inconvenient to inversely calculate preload and stiffness values, and it is inconvenient to dynamically adjust related parameters
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Embodiment 1
[0037] Known: bolt stiffness C b , Stiffness of connected parts C m , preload F 0 , working tension F . Find: The maximum tension of the bolt F 2 and residual preload F 1 ;
[0038] The method of use includes the following steps:
[0039] 1) According to the bolt stiffness C b and the stiffness of the connected parts C m According to the scale on the bolt stiffness dial 5 and the stiffness dial 6 of the connected part, adjust the angle between the bolt stiffness rod 3 and the deformation axis 1 θ b , and the angle between the stiffness rod 4 of the connected part and the deformation axis 1 θ m ;
[0040] 2) According to the preload F 0 size, at the angle of rod 4 maintaining the stiffness of the connected parts θ m Under the same situation, adjust the position of the pretightening force adjustment slide block 9 left and right, so that O 2 B = F 0 ;
[0041] 3) According to the working tension F size, adjust the left and right positions of the fo...
Embodiment 2
[0044] Known: bolt stiffness C b , Stiffness of connected parts C m , residual preload F 1 , working tension F . Ask for: preload F 0 size;
[0045] The method of use includes the following steps:
[0046] 1) According to the bolt stiffness C b and the stiffness of the connected parts C m According to the scale on the bolt stiffness dial 5 and the stiffness dial 6 of the connected part, adjust the angle between the bolt stiffness rod 3 and the deformation axis θ b , and the angle between the stiffness rod 4 of the connected part and the deformation axis θ m ;
[0047] 2) According to the residual preload F 1 and working pull F value, adjust the position of the force value scale left and right;
[0048] 3) According to the residual preload F 1 value, adjust the position of the preload adjustment slider 9, so that O 2 A = F 1 ;
[0049] 4) Reading: bolt pre-tightening force F 0 = O 2 B .
[0050] It should be noted that the present invention...
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Abstract
The invention relates to a bolt tension value calculation ruler mechanism and a use method thereof. A deformation shaft and a force shaft are vertically arranged, a bolt rigidity rod and a connected piece rigidity rod are crosswise distributed and are connected at the intersection through a hinge unit, and the hinge unit is respectively in sliding connection with the bolt rigidity rod and the connected piece rigidity rod. The lower end of the bolt rigidity rod is hinged to the intersection point of the deformation shaft and the force shaft. The lower end of the connected piece rigidity rod is in sliding fit with the deformation shaft; and the force value scale is vertically arranged and is distributed with the bolt rigidity rod and the connected piece rigidity rod in a crossed mode, the lower end of the force value scale is in sliding fit with the deformation shaft, and the force value scale is used for measuring the height value of each intersection point and the height value corresponds to the stress value. The mechanism is reasonable in design, convenient to use and high in intuition, the calculation process of stress deformation of the bolt and the connected piece is simulated through movement of the mechanism, the total tension and the residual pre-tightening force borne by the bolt can be positively solved, and the pre-tightening force and the rigidity of the bolt and the connected piece can be reversely solved.
Description
Technical field: [0001] The invention relates to a slide rule mechanism for bolt tension value and a using method thereof. Background technique: [0002] Bolt connections are widely used in various mechanical equipment, building components, bridge trusses and other structures. The force analysis and calculation of bolted connection is the basis for the calculation of bolted connection strength, and it is one of the important contents of engineering design. After the bolt connection is pre-tightened, the bolt is subjected to a pre-tightening force F 0 effect, at this time the pressure between the connected parts is also F 0 ,Such as figure 1 shown. When the pre-tightened bolt connection is subjected to working tension F After acting, the bolt tension increases to F 2 (referred to as the total bolt tension), which is reduced by the pressure between the connected parts to F 1 (called residual preload), such as figure 2 shown. total bolt tension F 2 size and prel...
Claims
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