Papers by Keyword: Cutting Arm

Abstract: The EBH300 Roadheader is one of the important equipment in laneway excavation of coal mine. It composed of mechanical, hydraulic, electrical and control systems, and covered cutting, shipment and travelling. Because of its hard working conditions, the complex cutting force and load fluctuation and vibration during the working process, the mechanical parts design plays very important roll to the EBH300 Roadheader. The 3D models of the EBH300 Roadheader were built based on the engineering prototype. The mechanical characteristics were studied for further development, which included mechanical structure, the vibration modes of the cutting parts, maximum amplitudes by modal analysis. According to the result, more attention must be paid to the complex force condition, violent and irregular vibration of the cutting parts in the design.

Abstract: Cutting arm was the key assembly of the roadheader. Since complex force condition, violent and irregular vibration, the parts of the cutting arm assembly acted with each other, which led to the surfaces wear and damage of the parts. The finite element software ANSYS was used to calculate the vibration modes of the six parts and the assembly of the cutting arm. The maximum amplitudes whose maximum order was five were got by modal analysis. According to the calculation result, it was found that the vibration frequency of internal expansion tube and external expansion tube was close in each order and analyzed the reason for their serious wear.

Abstract: Directional excavation technology in the coal mine laneway is the important research direction of integrated excavation project. This paper studies the changes of cutting section shape and boundary values caused by the swing of boom-type roadheader's cutting arm ​​to calculate the maximum values of compensable pose deviation when cutting, as the research basis for the accuracy analysis of boom-type roadheader's directional excavation. This paper gives the calculation method of cutting arm control, spatial modeling and analysis of cutting head position changes caused by cutting arm in thought of the three-dimensional analytic geometry, and also gives verification in the way of Matlab graphics simulation. At last, a control method to compensate section boundary by cutting arm is put forward.