| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 98 === In accordance with the need to cut off during the metal processing, band saw machine processing technology is one of the current trends in machine tool industry. However, during the sawing process, problems such as collapse gear, belt as well as low cutting rates may often happened because of the increase change of cutting force or the regenerative of chatter generation. In order to avoid these problems, first, by finding out the static and dynamic response of machine tool characteristics, then the experimental design followed by the response surface methodology can adjust the cutting parameters getting good results.
This paper can be divided into two parts. The first part focus on the static response test produced by the band saw machine. Observing the response from the case of static machine and analyzing the dynamic response of the band saw machine cutting caused by the impact. Then, analyzing the entire production process of chatter. It can be found that the experimental trends fit to the theoretical results. Chatters can be produced when it is high speed, small feed or slow speed, high feed.
When the chatters are generated, they not only cause the unstable affect to the cutting system, but also affect the cutting performance greatly. With the view to solving this phenomenon, try to adjust the cutting parameters so the cutting conditions can avoid the instability of the cutting area, and achieve to more stable cutting region. Moreover, considering the cutting wear resistance for the sawtooth effect, therefore, the second part of this paper is focus on the system for chatter suppression with an attempt to reduce the cutting force. The experiment of cutting and cutting force amplitude quantization, better use of response surface methodology the cutting conditions, and further discussion about the cutting force, cutting amplitude and the relationship between cutting parameters for the stability of domestic band saw sawing machine designed to provide optimal basis.
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