(1) The basic principle of using friction is to make the thread pair prevent relative rotation. Specific forms include the use of elastic washers (flat spring pads or corrugated spring pads), double nuts, nylon shrink rings, and the like. (2) The basic principle of destroying the relationship of the thread pair is to change the thread pair into a non-moving pair, thereby eliminating the possibility of relative rotation. Specific forms include welding, punching, and the use of metal bonding agents. The use of a thread-locking sealant acts as a metal bond and, after heating the coupling to a specified temperature, the locking sealant loses its function and can be easily removed multiple times. Improve the fatigue strength of the bolt connection. The strength of the bolted joint is determined by the strength of the bolt inflation bearing, and many factors affect the process. Because the damage of the tension bolt is mostly fatigue damage, it can start from reducing the load of the bolt and improving the fatigue strength of the bolt. The main measures are as follows: (1) Determine the appropriate pre-tightening force in the bolt inflation bearing and be Under the premise that the rigidity of the coupling is fixed, the pre-tightening force is appropriately increased, the fatigue strength of the bolt can be effectively improved, and harmful gaps in the joint structure can be avoided. (2) Improve the load distribution of the thread. When the force is transmitted, the force of the thread of each thread is not uniform. The force of the nut decreases along the direction of the bolt head to the nut, and the first moment of the screw is the most stressed. After the laps are decremented, after the 810th lap, the thread is almost unstressed. The specific method includes the use of a suspension nut, an inner oblique nut, a ring groove nut, etc., and the use of a wire screw sleeve is also an effective method. The main principle of reducing the influence of additional stress and stress concentration is to keep the axis of the bolt perpendicular to the pressure-receiving surface of the coupled member as much as possible so that the bolt can only withstand the tensile force without receiving the bending moment. The specific form mainly includes adding a spherical washer, using a wedge washer to match the pressed inclined plane of the coupled member, adding a boss, a sinker seat, and the like. Welding Table Square,Black Steel Hollow Section,Black Square Hollow Section EXA International Trading (Tianjin) Co., Ltd , http://www.tjsteelplank.com
The strategy of raising the rationalization of the parallel bolts
(1) The basic principle of using friction is to make the thread pair prevent relative rotation. Specific forms include the use of elastic washers (flat spring pads or corrugated spring pads), double nuts, nylon shrink rings, and the like. (2) The basic principle of destroying the relationship of the thread pair is to change the thread pair into a non-moving pair, thereby eliminating the possibility of relative rotation. The specific form has welding