| Concrete demolition device is a kind of wireless remote control multifunction robot developed with high-risk environmental characteristics, which is widely used in construction, transportation industry and rescue field. Due to the concrete demolition device has strong adaptability to the environment, a wide operating range, the convenient and flexible operation and safe and reliable performance, it wins the favor of majority construction work manufacturer. The manufacturing sector is also increasingly flourished.Concrete demolition device is mainly composed by power device, walking device, rotary device, working device, transmission system and control system. This thesis mainly studies design of the working device.The main function of concrete demolition device is crushing concrete. Working device directly completes the task of crushing. Many developed countries in engineering machinery widely used new methods and new technologies to improve the productivity and operation performance of demolition robot. By design method of working device in professional and general demolition robot, the comprehensive computer design of the working device was carried on. It has great significance in promoting development of the concrete demolition device design research.The paper comprehensively collected design model of concrete demolition device at home and abroad. The design requirements of the hydraulic excavator working device was referenced, the various working conditions of concrete demolition device was analyzed and design requirements of the demolition robot device were summarized. Modern design method based on comprehensive computer simulation was proposed.Concrete demolition device could be reduced to planar linkage mechanism. Therefore, the general method of planar linkage mechanism is discussed. The work device motion was analysis by the bar component solutionMechanical3d design software and the finite element analysis software were detailed discussed and researched, the model of the demolition robot working device was designed using SOLIDWORKS, then working device was devised by the professional mesh division software HYPERMESH and material properties were added. Principle of demolition robot crushing concrete was analyzed and corresponding constraint and load was applied on the corresponding parts. The k.file was imported to post-processing software ANSYS/DYNA to analysis the strength and stiffness getting the whole assembly body stress and deformation echogram. According to the results of finite element analysis, the existing problems of the structure were found out and the arm unreasonable part was improved.At last, the work equipment was carried on stress test in situ combined with test, the test results and theoretical calculation was compared and error was corresponding analyzed. Analysis results show that the finite element model established is correct. It provides theoretical basis for improving the demolition robot design and the stability of the demolition robot.Research in this thesis laid the theoretical basis to working device structure optimization and dynamics research of demolition robot. |
PDF Full Text Request