The bolt rod design bolt rod is the direct bearing part of the umbrella load. The weakening groove on the bolt rod is required to withstand the axial tension of (49±4.9) kN, and the inner wall of the hole of the 5 steel balls is also subjected to the reverse extrusion from the steel ball. Pressure, so the material of the bolt rod is made of hardened precipitation stainless steel 0Cr17Ni4Cu4Nb. This material not only has strong tensile strength and crushing strength, but also has strong resistance to high temperature and rust. The strength of the bolt rod checks that the round hole on the bolt rod has a great influence on the bearing capacity of the bolt rod. However, after the weakening, the bolt rod cross section still has a large cross-sectional area, which can meet the tensile strength requirement, and the bolt rod and the steel ball contact the squeeze point. The compressive stress is relatively large, so the dangerous section of the bolt rod is the contact surface with the steel ball. The design of the outer cylinder pulls the pressure of the outer cylinder through 5 steel balls. Because the steel ball and the outer cylinder bearing groove are in point contact, the action surface is small, and it is easy to exceed the yield point of the outer cylinder material to form an indentation. Under continuous action, groove marks are formed, which causes the bolt rod to slip off. At the same time, the steel ball has a large radial force on the outer cylinder, which easily causes cracking of the outer cylinder. The design of the piston is mainly caused by the extrusion of the steel ball. If the hardness of the piston is not enough, the contact point between the piston and the steel ball will be greatly deformed, which will reduce the working surface of the steel ball and the outer cylinder, thereby reducing the load capacity of the product. , it will hinder the movement of the piston, which is not conducive to the release of the bolt. Therefore, the piston uses carbon tool steel T8A, which has high hardness and good toughness, can withstand local extrusion and impact loads, and heat treatment of the stressed part. The design of the steel ball is simultaneously subjected to the force from the piston, the rod and the outer cylinder. The deformation of the steel ball will reduce the action surface of the steel ball and the outer cylinder, so that the load capacity is reduced; the cracking of the steel ball will cause sticking and affect the normal release of the bolt rod. The steel ball with GCr15 high quality bearing steel is selected for high strength and hardness, which can meet the requirements of product load and release. The electric detonator design electric detonator is designed as a double bridge insensitive electric detonator and an electric detonator structure. It is used in combination with a bridge of nickel-chromium alloy material, which has short action time, small synchronization deviation and stable performance. The agent has been widely used in a variety of styling and research products, has undergone a variety of environmental tests and has stable performance. The output charge adopts HY-6 black powder. The black powder has a high detonation pressure, and the gas production is large. The piston can generate a large output thrust, which is beneficial to the separation of the bolts. The medicament is a commonly used medicament for stereotypes, and has stable performance and reliable source. In order to ensure that the output energy of the electric detonator can reliably cut the shear pin and ensure that the bolt can be released normally under no-load conditions, according to the requirements of GJB1075-86 for the charge margin, the maximum charge and minimum of the output charge are made. Charge test, see the results. After the output dose is determined, the release test under the limit conditions such as load release, no-load release, and no-load release after loading shows that the charge amount is designed reasonably and meets the requirements for use. Conclusion Based on the dynamic characteristics of brittle materials such as explosives, the influence of material parameters on crack growth rate is discussed. The dynamic fracture failure criterion of brittle materials is given. The following conclusions can be drawn: (1) Static fracture criterion of brittle materials and The dynamic rupture criteria are different. (2) For a given brittle material crack length, whether it is dynamic or static loading, the crack propagation needs to have a critical stress threshold value that is inversely proportional to the crack length, and the dynamics are larger than static. (3) When the energy density of the external load is less than a certain value, any crack in the brittle material cannot be expanded; and when the energy density is large, there will be many crack propagation in the crack length of a certain section. (4) The crack growth rate of brittle materials increases with the increase of stress, specific surface energy and elastic modulus, and decreases with the increase of material density. Replacement Uv Lamp,,Uvc Disinfection Lamp ,Amalgam Uv Light ,Germicidal Uvc Lamp Guangdong Kingrate Optoelectronic Technology Co., Ltd. , https://www.kingrateuv.com