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随着我国农业政策的落实,对小型农机的需求量也在猛增。手工或简单机械化的铸造生产方式,无论是铸件质量还是铸件数量,都已不能满足生产发展的要求。于是,“利用原有厂房,变手工生产为机械化流水作业生产”,这个带有普遍意义的挖潜改造课题,就摆在我们面前。技改设计要求在特定的条件下作出比较合理的工艺流程和机械化运输设计,它往往比做一个全新的设计困难得多。所以,总结技改设计的特点和规律,是很有必要的。本文举40吨/时砂处理单元的技改设计为例,是因为它带有普遍性(几乎每个要求技改的铸造车间都把砂处理的技改放在首位,而40吨/时的砂处理量在流水线造型生产中又是应用比较多的),还因为在砂处理的技改中,要求和现实条件之间的矛盾表
With the implementation of China’s agricultural policy, the demand for small-scale agricultural machinery has also soared. Manual or simple mechanized casting production methods, whether it is the quality of castings or the number of castings, can no longer meet the requirements of production development. Therefore, “Using the original factory buildings, changing the manual production into mechanized flow production,” this topic of universal significance for tapping and renovating lies before us. Technical innovation design requires more reasonable technological process and mechanized transportation design under certain conditions, which is often much more difficult than doing a completely new design. Therefore, it is very necessary to sum up the characteristics and laws of technical reform design. This article took the example of the technical modification of the sand processing unit at 40 tons/hour because it has universality (almost every casting workshop that requires technical improvement puts the technical reform of sand processing first, and 40 tons/hour Sand processing capacity is also used in the production of assembly lines. It is also because of the contradiction between the requirements and the actual conditions in the technological transformation of sand processing.