The Ca6140 Ordinary Nc Lathe, And

Most enterprises still have large amounts general-purpose machine tools which have longevity of service, low precision, can not adapt to mass production, low automatization and adaptability, but can not be washed out because of its low cost and continuity of enterprise's production.As a representative production of mechanical, electronic, hydraulic and pneumatic integration, numerically controlled machines have a stabilization quality and high efficiency, and can solve problems such as complex structure, high precision, mass production, part variety in machining.Purchasing new numerically controlled machines is an important way to improve production precision and efficiency, but it may not come true to many enterprises because it cost much. Enterprises'equipment updating step are counteracted severly. So General lathe's numerically controlled reforming is a quick way that costs less, improve production precision and efficiency, and it can improve enterprises'competitive power. So it can takes its place in our way to a powerful manufacturing country.The economical efficiency of the reform and the application of NC technology in General purpose lathe CA6140's numerically controlled reforming is researched in this paper according to our practice of CA6140's numerically controlled reforming. And the reforming scheme and main points are formed. The main contents is:1.The economical efficiency of the reform is evaluated in detail and the reforming scheme is maked according to misty optimum's synthesize adjudicate principle.2.The ball screw's type, assembling , supporting, bearing type, and stepping motor of feeding system is designed.3.The import and domestic NC systems were compared carefully, brought up a choose method and selected the NC system and automatic tool rest according to the function and accuracy index of reforming.4. The complete electricity control diagram was drawn out according to the result of comparing CA6140's electricity control system and principle with the reforming CJK6140-A's NC system.5.In order to protect the function of cutting a screw, we carefully studied the impulse regulator and its connection with the principal axis, and draw out a technique diagram.6. Disassembled the lathe, throw away the old feeding system, repaired the main driving system, covered plastics on sliding surface, shoveling or scraping and testing, counted or measured the parts of the lathe.7. Designed the protection cover's construction, and draw out parts diagrams and assemble diagram.8. Methods of installing and testing of general purpose lathe's numerically controlled reforming were put forward.Reforming general purpose lathe CA6140 to a numerically controlled lathe, the main drive adopt step speed change(forward direction 32 kinds, negative direction 16 kinds),and it can realize line interpolation, circular interpolation, fixed cycle, composite cycle, invariable line speed turning, tool radius offset, tool function, feed function, cooling fluid control function and jog mode. Manufacturing accuracy are improved(X<0.002m m, Z <0.004mm, cylinder<0.01mm),and efficiency 20-30%.