In order to meet the various requirements of diversified products and efficient production faced by CNC manufacturing technology,a composite turning tool with three tool combinations suitable for oil casing processing based on production and processing experience is proposed. The structural design and working principle are systematically elabora-ted,analysis and research are conducted on key features. The results show that the composite turning tool structure designed is reasonable,which can effectively reduce the number of tool changes,save tool change time,and improve machining effi-ciency and accuracy.
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