How to control the precision of CNC lathe processing slender shaft?

In the machining process, there are many shaft parts whose aspect ratio L/d>25. Under the action of cutting force, gravity and top tightening force, the horizontal slender shaft is easy to bend or even lose stability. Therefore, it is necessary to improve the force of the slender shaft when turning the slender shaft. Processing method: Reverse feed turning is adopted, and a series of effective measures such as reasonable tool geometric parameters, cutting parameters, tensioning device and bushing type follower holder are selected. 1. Analysis of the factors of bending deformation of the turning slender shaft. There are mainly two traditional clamping methods used in turning the slender shaft on the lathe: one method is: one-clamp and one-top installation; the other is: two-center installation . 1. Deformation caused by cutting force 2. The effect of cutting heat 2. Measures to improve the machining accuracy of slender shafts During the machining of slender shafts, in order to improve the machining accuracy, different measures should be taken according to different production conditions. Improve the machining accuracy of slender shafts. 1. Choose a suitable clamping method. Among the two traditional clamping methods used for turning slender shafts on a lathe, the double-center clamping is used to ensure accurate positioning of the workpiece and easy to ensure coaxiality. The machining of slender shafts usually adopts a clamping method of one clamp and one top. However, in this clamping method, if the top is pressed too tightly, in addition to bending the slender shaft, it can also hinder the heat elongation of the slender shaft during turning, resulting in bending of the slender shaft due to axial compression. Deformed. 2. Directly reduce the force and deformation of the slender shaft 1) Use the tool holder and the center frame 2) Use the axial clamping method to turn the slender shaft 3) Use the reverse cutting method to turn the slender shaft 4) Use the magnetic cutting method to turn fine Long shaft 3. Reasonably control the cutting amount 1) Depth of cut 2) Feed rate 3) Cutting speed Due to the poor rigidity of the slender shaft, the force and thermal deformation generated during turning are large, and it is difficult to ensure the processing quality of the slender shaft Require. By adopting appropriate clamping methods and advanced processing methods, choosing reasonable tool angles and cutting quantities, etc., the processing quality requirements of slender shafts can be guaranteed.