The Research On Blocks Car And The Braking System Of Multi-wire Saw

With the rapid development of China’s stone industry, there is an urgent need of innovation for mining technology and mining equipment level. Multi-wire diamond saw is as the latest achievements in the granite sawing field. With the advantages of flexibility, security, universities, environmental protection and high produced rate, it is commonly recognized the world’s frontal stone mining equipment. It’s domestic development is still in its infancy, so the research of multi-wire diamond saw related components have important significance. The purpose of this Paper is to develop a new blocks car and whole brake components of multi-wire diamond saw with independent intellectual property rights.Combined with modern design methods of mechanical products, a program of innovative design process of multi-wire diamond saw blocks car is formulated. With the depth analysis of the structural characteristics of foreign multi-wire diamond saw blocks car, the technical Parameters and performance requirements of the blocks car is determine, and the blocks car’s overall design requirements is given. Then the functional decomposition of multi-wire diamond saw blocks car is done and function-structure relationship is established, a list of structure is modular divided, then apply the TRIZ method to the blocks car innovative design process, this innovative design is completed. Finally, each module structure is established and then all modules is integrated to establish the whole three-dimensional design in Solidworks software.Based on the ANSYS Workbench (Hereinafter referred to AWE) collaborative development platform, how to directly import three-dimensional design built by Solidworks software is researched and the coordination and management of the three-dimensional design and CAE analysis is achieved. Material definition, meshing, contact set, load and boundary conditions in pre-treatment are expounded, finite element analysis of the multi-wire diamond saw blocks car is carried, and use optimization design ideas and DOE module based on the experimental to lightweight design, finally the composite indicator of multi-wire diamond saw blocks car equipment which tends to be best was obtained.Use the modal analysis module of the ANSYS Workbench to analysis the natural frequency and vibration of the blocks car, extract previous Sixth-order modes, identify the largest area of deformation. Develop the performance evaluation method about the pros and cons of the dynamic and perform the evaluation of the multi-wire diamond saw blocks car, finally provided a theoretical basis for the design of the blocks car.Through the depth research and analysis of each gear of multi-wire diamond saw, determine that the driving wheel brake way is dynamic braking. According to calculations, the braking power, the resistor and the current of the brake unit and are all related to the braking time. The tensioner pulley and the positioning wheel are braked by the friction between the bead-rope and rope groove. Use belt drive analysis methods to analyze the transmission situation between the bead-rope and rope groove. The maximum braking torque and the shortest braking time under the maximum static friction force is figured out. Finally, the whole brake unit is calculated and analyzed.The study is funded by Shandong Province Science and Technology Development Program (item numbers:201OGGX10405) and Natural Science Foundation of Shandong Province (item numbers:ZR2012EEM032).