Dynamic Analysis Of Driving Mechanism For Needle In Tufting Machine

The requirement for carpet is continually increasing with better life. According to the statistics, tufting carpet is supplied more than 80% of market share, however China only occupies 3% of tufting carpet production in whole world. The state attributes to the tufting technology about research/design and manufacturing is far behind others'abroad. One reason is Independent intellectual property right of carpet technology has not been formed in China so that with importing the carpet machine, the requirement is still more than the production. The other reason is the advanced technology is owned in several countries to limit the domestic technological development. Then to change the situation, many companies develop core technology to have independent tufting technology. The dynamic analysis of driving mechanism in tufting machine is raised at the background. In driving mechanism, the slender spindle is prior to develop, because it as the core system is suffered with the variable load.Start from researching the structure of driving mechanism to draw the 3D modeling in Solidworks, to simulate kinematical movement in ADAMS and to analyze dynamical load in ANSYS. On the basis of analysis, improve the mechanism and analyze the new one to compare with the old load result, then verify the availability of improved design. The content includes:1. According to the real tufting machine, draw the same dimensional modeling in SOLIDWORKS. Simplify the modeling to four-bar mechanism to get the position/velocity and acceleration of linked point on each bar. The data can guide the analysis of design and load.2. With virtual prototype technology, use ADAMS to simulate kinematical movement of driving mechanism and analyze the load on spindle to export the load data. Import these data to ANSYS to analyze the load state. These analyses are most developed on spindle.3. With the load analysis, make three proposals respectively:redesigning the spindle/ readjusting the layout the linked joint on spindle/adding a new bearing. Considering the availability/complexity and improved effect, choose the most convenient and best proposal. It means modifying the horizontal structure to bearing house. Kinematical simulation and dynamical analysis for new design are researched and compared to the old one to verify how the design is.4. Elaborate what the lack is and how big the influence is in the process from creating modeling to analysis. Make further explanation about the deficiencies of improved design and the prospect on optimization design.Research the kinematical simulation and dynamical analysis of driving mechanism to get the deformation situation on spindle. Redesign the mechanism structure to decrease the deformation. Then analyze the new design in ANSYS and compare with the old one to verify the improved structure. The lack is without considering integration the modification of spindle into the adjustment of structure, optimize the whole structure.