Study On Refitting A Common Lathe Into The Special Equipment To Process End Face And Central Hole By Using Numerical Control Technique

The rathe refit is a means of technical reform that is to make use of the formerly idle and old equipments and give necessary technical reform so as to meet the new demand of production. According to the relative report, at some industrially developed countries, the average tenure of use for the equipment is limited in about 15-20 years and the period of technically aging for equipment is already shorter than 10 years. In those countries metioned above the old machine tool refit rate exceeded more than 80%.Currently the equipments using in most part of the enterprises in our country were old. the problems of technically aging and inadequate exist obviously, the products produced by those equipments are low in accuracy, bad in surface quality, high in cost and unstable in performance and there are not very competitive in international market. This situation obstructed the forward development of our processing industry.Along with the rapid developments of the computer technology, Particularly the automatic control system that adopts the programmable controller is favored by various industries for its characteristics of no environment limit, high reliability and perfect performance, the PLC technique got the unprecedented development.This paper is aimed to solve the problem of low efficiency, bad accuracy and high demand on the workers technical level when processing the end face and center hole of axle parts on the common lathe, through the technical reform on mechanical drive system and electric control system of a common lathe (the lathe main drive system brings along two tools to realize main body movement, PLC controls the two stepping motors to drive workpieces double position feed, an idle old common lathe is refit into a special equipment to process end face and center hole by using numerical controlled technique The refit machine promoted its processing accuracy and level of automatic control of the parts and greatly improved the productive efficiency and it has the following characteristics: small investment, better efficiency, less refit workload, short period of manufacturing and testing, high utilization rate of old equipment and easily resume its former processing function when stopping production of such parts in future, it is of practical importance to the small and middle-sized enterprises.