Design And Research Of Automatic Feeding And Blanking Devices For Large Heads Punching Machine

With the development of modern manufacture engineering, punching manufacturing technology becomes more automatic and more flexible and its speed becomes higher. Traditional ways such as manual operation, manual feed and manual transfer in the process of punching can not meet the requirements of the fast developing industry. The automatization of manufacturing cell or the makeup of flexible automatic production lines in the process of punching production is an efficient way to carry out the production in high speed, high efficiency and high quality. It is one of the most important directions of modern punching manufacturing technology.As special and specific punching equipment, large punching machines for heads are few and their costs are very expensive. Furthermore, their work efficiency is very slow in our country because its feeding and blanking depend on manual operation, which are difficult and dangerous. These traditional operation ways restrict the utilization ratio of large punching machines for heads seriously and have a side effect on the competitive power of domestic enterprises in international markets.Following the domestic and international development of auxiliary machines for punching, this thesis has developed an auxiliary machine served for a big punching machine, which can complete feeding, blanking, alignment, and spraying lubricating liquid high effectively. The specific work in this thesis is as following:Firstly, the punching techniques of production for large head parts are researched. The operation mode, the characters of structures, and the requirement of feeding and blanking are analyzed. The operating principle of the auxiliary machine for feeding and blanking is confirmed. The system blueprint of the automatic auxiliary machine for feeding and blanking is designed.In detail, according to the design blueprint, following the modular design method, this thesis has analyzed, calculated and designed the billet vehicle, feeding vehicle, blanking vehicle, rotary and lifting mechanism for spray coating.Secondly, the hydraulic system and the pneumatic system adopted in the auxiliary machine are researched. This thesis has also analyzed the lifting of both the vacuum sucking disk and rotary mechanism, demonstrated the operating principle of the pneumatic system, calculated and designed for key devices, analyzed the operation characters of the pneumatic system, drawn the operating principle chart, and calculated and chosen key devices, such as vacuum sucking disk, vacuum pumps and so on.Finally, the control system of the auxiliary machine has been designed. According to the characters of both controlled objective and control system, PLC has been selected as the core of the control system; the hardware connection has been ensured; and the software procedures have been coded.