Research And Application Of The Working Device Of The Wheel Arch Installation Machine

In the tunnel construction,when encountering weak surrounding rock,the initial support must be carried out.In this process,the steel arch installation is one of the procedures.In China,the tunnel arch installation is generally manual and supplemented by simple machinery,there is no special arch mounting vehicle.This method not only has high installation strength and low efficiency,but also has great hidden danger of safety.In order to solve this problem and realize the mechanized operation of arch installation,the steel arch mounting machine has become the main research object,especially the working device of the mounting machine.After analyzing the construction environment of tunnel and the installation requirements of steel arch in China,a design scheme of working device was proposed,which mainly included manipulator and hanging basket system.Use modern design and analysis methods to analyze the structural performance of the design phase has important reference value.The main contents and methods of this paper are as follows:(1)Aiming at the tunnel construction environment,steel arch construction technology and installation requirements in our country,this paper puts forward the design requirements of the working device,established the whole scheme of the manipulator and the hanging basket system,and designs the key components in Solid Works.The three-dimensional model was established and the assembly was performed in the relevant order,and the virtual prototype model was established.(2)The virtual prototype model was imported into the multi-body dynamics software ADAMS,and the dynamic model of the manipulator and hanging basket system was established.In the ADAMS/View module,it was simplified,and the parameters such as constraints,attributes,STEP function,load and so on were set.The kinematics and dynamics simulation of the manipulator and the hanging basket were carried out.The working range of the working device and the stress conditions of each cylinder were obtained,which provides reference for the finite element analysis and the design of the hydraulic system.(3)Using ANSYS Workbench to perform static analysis on the key parts of the manipulator and hanging basket system.According to the results of dynamic simulation,the force at the twist point is provided,and the strength and stiffness of the dangerous position are checked to provide the basis for the following structural optimization and improvement design.(4)According to the movement requirements of the hanging basket system,the hydraulic design scheme was proposed.A load-sensitive control system of quantitative pump is adopted,and the automatic control system of electro-hydraulic proportional leveling is adopted in the operating platform,and the main hydraulic component parameters were determined.(5)The prototype was prototyped,and a prototype study was conducted on the prototype to obtain the prototype’s external dimensions and performance parameters.The installation test was conducted in the tunnel and the results were analyzed to provide the basis for the overall optimization of the follow-up work device.The research methods and achievements in this paper can be used for the analysis and research of similar mechanical arm and telescopic arm structures,which is helpful to ensure product reliability,improve the product quality and shorten the product design and development cycle of products.