High-speed Punching Machine Drive System Life Cycle Reliability Key Technology Research

High speed punch is a kind of important stamping equipment. Compared withcommon punching machine, high-speed punching machine has the characteristics ofhigh speed, high precision and high efficiency. At present, high-speed punchingmachine has been widely used in aerospace, automotive industry, electronic instrument,household appliances, defense industry, commodity production and other departments.In the construction of national economy, it plays a more and more important role.However, domestic high-speed punches are general poor at their reliability that hasseriously affected the market share in the domestic market and international marketcompetitiveness. In order to solve this problem, the main drive system of high-speedpunch is served as the research object, and the life cycle reliability of the transmissionsystem as the paper main line. The key technologies which are used in controlling thesystem reliability in different stages of the life cycle are studied. The research ofhigh-speed punch press has a very important meaning to improve reliability. The mainresearch contents are as follows:In transmission system reliability design stage, the research work start from theanalysis of transmission system working principle and structure, and transmissionsystem reliability model is established. The fault status of punching machinetransmission system are analyzed which are based on the fault data collected fromtransmission system. And then the fault trees of the key features from the drive systemare established which can be used to find out the weak link of transmission systemreliability and the seriously factors. At the same time, targeted fault eliminationmeasures are put forward. Finally, the method of using interval mathematical theory ontransmission system reliability allocation is researched.In the manufacturing process, how to ensure the transmission system partsprocessing consistency and assembly system reliability are studied. In response to theissue of the parts processing consistency, first the relationship between the partsmachining process capability and processing consistency are analyzed, and points outthat improving parts processing consistency can be achieved through the ability toimprove the parts processing process. Then on the basis of introducing the processcapability analysis process, the process capability of fine boring driveline ball head roddiameter is analyzed, and control measures are proposed for the problem of process capability insufficient in the rod bore processing. Transmission system assemblyreliability can be achieved by studying the reliability of its function formation processThen, the function formation process of the transmission system are decomposed in theformation process of the transmission system parts unit movements and the connectionbetween components. Lastly, the reliability control measures are implemented in therealization of the parts unit movements and the connection between components.In the transmission system use and maintenance process, the driveline parts repairway decision-making and preventive maintenance cycle decisions are researched. Whenanalyzing parts’ maintenance mode, a component repair decision model based on theimportance evaluation is proposed. First of all, the importance of the parts is evaluatedthrough fuzzy comprehensive evaluation, and the best way to equipment maintenancecan be obtained through a further logical decision-making analysis for the equipment.Finally presents a concrete example analysis. When calculating the parts preventivemaintenance cycle, on the basis of introduction of two basic types of preventivemaintenance, the decision-making model of optimal preventive maintenance cycle isgiven. Then the failure data collected from the research object running the processwhich can be used to establish two parameter Weibull distribution model. Finally, onthe basis of the principle of the maximum validity, the best preventive maintenancecycle is studied.