| As a developing country, the energy problem directly affects the economic development in our country. Because of our country is rich in coal resources reserves, in order to solve the problem of energy shortage that we must develop the coal career, improve the coal production. As the energy demand growing, the coal mine production scale is constantly expanding, at the same time mining intensity is also becoming more and more biger, which requires intelligent machine mechanization operation, accelerate the advance rate. Therefore, Boom Roadheader widely used in mines down-hole tunneling, underground construction, water conservancy culvert excavation and other traffic tunneling, etc, and its development has greatly improved the efficiency of roadway excavation. Boring machine has the advantages of safe, efficient and good quality into Lane, but there are large cost, complex structure, loss larger disadvantage.EBZ-132type boring machine is designed and manufactured by the Coal Research Institute Taiyuan Branch. the main characteristics of the machine is compact structure, easy vertical and horizontal cutting scraper conveyor, can be selected according to the conditions of different lengths. Due to the reasons of Machine adaptability, short body, low center of gravity, work smoothly, simple operation, easy maintenance and so on, so you can dig any cross-sectional shape of the tunnel, can quickly cutting one-way compressive strength less than or equal to60MPa coalrock. According to the situation of the actual working conditions of the EBZ-132type boring machine easily damaged parts, it need to do the simulation analysis and identify the cause of the damage, which provide a basis for the optimal design of the boring machine.In the process of cutting, the force of the cutting head changes greatly, the stress state and the strain are very complex, which directly impact on the boring machine’s cutting performance, productivity and service life. Cutter and adapter is an important part of the cutting head, Conical teeth is composed of Arbor and installed on the shank of the blade, in the process of cutting, It to withstand the external load from coal and rock, stone layer, inclusions, etc. Due to the poor working conditions, by the complexity of the force, impact load, which put forward higher requirements on the cutter and adapter strength and structure, it is necessary to do the stress analysis of cutter and adapter and understand the stress distribution of cutting coal and rock.Slewing mechanism is one of the main components of the Boom Roadheader, it connect the cantilever mechanical and the left and right pressure angling cylinder together, which can be realized cantilever structure elevating and rotary motion around, and which are subject to the impact load from the complex alternating cutting head. When designing the rotating platform, it has to meet the requirement of a large carrying capacity, the small inertia force, smoothly operation, sufficient strength and stiffness, low center of gravity etc. The rotating platform structure design is good or bad will directly affect the efficiency of the machine and smooth cutting.In this paper, using the three-dimensional modeling software of solidworks to establish the three-dimensional simplified model of the longitudinal axis of the tunneling machine, and use the static interference check function comes with to SolidWorks to check whether there is static interference. Then save the three-dimensional model as parasolid format and import it into ADAMS, according to the actual situation, established the virtual prototype of the longitudinal axis of the tunneling machine. Take kinematics simulation of virtual prototype in ADAMS, so as to check whether there is dynamic interference in virtual prototype. Then use ADAMS/View module to do the dynamics simulation analysis of the tunneling machine, and finally make the Finite Element Analysis of the tunneling machine’s cutting tooth and tooth holder, rotating mechanism in SolidWorks Simulation. Now the main research content of this paper is summarized as follows:(1) According to the research priorities, using the3D modeling software of SolidWorks to establish the three-dimensional model of longitudinal excavators which is reasonable simplified, and then use static interference check function which comes with SolidWorks to check whether there is static interference, and modify the interference part until the interference does not exist.(2) Create the virtual prototype of longitudinal excavators. Then import the three-dimensional simplified model created by SolidWorks into ADAMS, according to the actual movement of the boring machine, add constraints in ADAMS; Add drive to the rotation of the rotating cylinder and the lift cylinder deputy, complete the creation of the virtual prototype.(3) Take kinematics simulation of virtual prototype in ADAMS, so as to check whether there is dynamic interference in virtual prototype.(4) The cutting head of tunneling machine dynamics simulation. Then use ADAMS/View module to do the dynamics simulation analysis of the tunneling machine, concluded that:①in the direction of the X-axis, Y-axis, that is, the direction of cutting resistance and feed resistance are along with the X-axis and Y-axis;②with the cutting head rotation, the crest of force changed alternately, cutting head subjected to changing load, which may cause the vibration of the tunneling machine.(5) The Finite Element Analysis of the key parts of tunneling machine. Make the Finite Element Analysis of the tunneling machine’s cutting tooth and tooth holder, rotating mechanism in SolidWorks Simulation. Analysis of its key parts of the maximum stress and the node displacement diagram, which can get the weaknesses in the cut-off tip and adapter and slewing mechanism, on this basis put forward the improvement program and provides a basis for further optimization of the design. |
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