| In the machining process, the cutting system especially the tool vibration shaking phenomenon often occurs in operation process, which results in the operation hardly reach to the optimal level and severely affecting the working efficiency. Thus some problems appear,such as low quality machined parts, high noise during the operation process, tool life is short,there may even be processed into waste and other issues. Therefore, the emergence of vibration of the tool not only can effectively improve the processing efficiency, but also is an important guarantee of processing of qualified products.What this paper studied about damping tool is to suppress the tool vibration further. In terms of vibration tool, many companies have proven tool solutions, and the currently recognized tool vibration reduction methods include: the use of composite materials cutter,installing the damper in the cutter, adding the particles damper in the cutter, electro rheological technology and so on. There are many ways, but the author found that there is not yet a way which can set "hundreds of advantages" through deep study. So the main content of this paper which is the innovation of this paper also is the use of composite vibration method to achieve the purpose, that means using magneto-rheological technology and particle vibration damping technology at the same time. If this method is feasible, it may provide a new way of thinking for the future development of vibration of the tool.The first part introduces the research background, significance and the development status about researching progress of damping tools at home and abroad in recent years, and highlights the development of magnetic resonance damping technology particle damping technology at home and abroad and the research space we can continue to do study.The second part of this paper introduce the nature of the performance of magnet rheological fluid briefly, and then through comparing the properties of magnet rheological fluid and the nature of electro rheological fluid to make an example to explain the reason ofchoosing magnet rheological fluid. Next, move on to illustrate a description of the mode of operation of magnet rheological technology, design the basic structure of magnet rheological damping tool, and test the static flexibility and damping performance. Finally, the feasibility of this approach is proved from a theoretical point by stating the damping mechanism.The third part of this paper instructs how to select the material of the cutting tool and the characteristics and vibration of the particles itself. The design of the dynamic model of vibration holder uses the finite element simulation tool to analyze the cavity size. Then make a modal analysis of solid and hollow cutter holder, compare their inherent high and low frequency. Finally, the finite element simulation study method of particles collision from the aspect of energy provides gist for the future in-depth study of the method.In the fourth part, the author mainly does experimental verification, and respectively introduces the principle of magneto-rheological damping vibration of the tool and the principles of particle damping technology. The description of equipment is used in this experiment and the specific experiments program. Finally, the hammering experiments and boring experiments verify the damping effect of the advantages and disadvantages by measuring the processing finished parts of the surface roughness. |
PDF Full Text Request