| The widespread use of drilling and blasting in underground excavation works,the drilling equipment has been developed rapidly and gradually perfect.Drilling operations are engineering techniques for drilling out specific eye holes in a rock(ore),it is the primary process of mine production,tunnel and stone project,the drill is the most commonly used equipment in mining and tunnel excavation.It is the most direct part of the drilling machine,which consists of drill bit,drill rod,connection set,drill shank,the drill has a rough friction with the rock during the working process,resistant to high pressure flushing medium scouring and corrosion,withstand complex alternating stresses,early failure often occurs.In a small space,poor working environment to replace the drilling tools,it wastes time,effort and money,with the continuous application of advanced machinery and equipment in the mining,tunnels and other large projects,the project will gradually improve the requirements for reducing the duration,increasing the efficiency,speeding up the progress of the project,saving money and materials,protecting the environment and so on,therefore,the exploration and development of drilling equipment and construction methods will be of great practical significance.This article is based on the Rocket Boomer L2 D,which is produced by Atlas Copco,in this article,the basic structure of the hydraulic drill and its working process are analyzed,and the principle of hydraulic drill is expounded in detail,and established a 3D assembly model of the rock drill,the dynamic analysis of the impact rocking process was carried out.The ANSYS explicit dynamic analysis software was used to calculate and analyze the part of the drill rod,the results of the dynamic response time of the drilling process of the drill rod,drill bit,drill tip and so on are obtained.The theory of fatigue life is discussed,and the static analysis of the drill rod was carried out by ANSYS APDL,combined with the use of drill rod conditions,the fatigue life of the drill is obtained by analyzing the fatigue analysis module of ANSYS APDL,and the calculation results are analyzed,the measures to improve the service life of the drilling tools are put forward.Introduced the theory of finite element topology,and through the Altair OptiStruct to achieve the reinforcement design at both ends of the threaded connection.Combined with the use of drill rod conditions,topological optimization of the reinforcement structure based on the Altair OptiStruct static analysis,the structure topological appearance of the structure was met with the requirement of the intensity and the light weight.In this paper,the dynamic study,dynamic simulation analysis,static analysis and fatigue life study and the design of structural topological optimization are studied,which providessome reference for further study of the drill,it also has some guiding value for practical engineering application. |
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