When the slender shaft is processed, due to poor thermal diffusion performance, centrifugal force during high-speed rotation, and the weight of the workpiece itself is prone to bending deformation, these conditions will seriously affect the accuracy of the slender shaft, for manufacturers How to improve the machining accuracy is a problem worthy of discussion. Today we will introduce several methods to improve the machining accuracy of slender shafts.
1. Choose a suitable clamping method
Although the traditional clamping method can obtain more accurate positioning and maintain the coaxiality, this method is suitable for other shaft processing, and it is not suitable for the processing of slender shafts, because this processing method is easy to cause Bending and deforming. The one-clamp-one-top clamping method is more suitable for processing slender shafts. In order to reduce deformation, the tool holder and the center frame are used for positioning.
2. Reasonably grasp the cutting amount
Whether the cutting amount is well grasped directly affects the severity of the deformation of the slender shaft. Generally speaking, the greater the depth of cut, the more severe the deformation of the slender shaft, so it is necessary to control the depth of cutting; appropriately increase the feed rate, because the increase in the feed rate, the cutting force will increase, and the cutting efficiency is also Will increase; Properly control the cutting speed, and cannot blindly increase the cutting speed in order to improve efficiency, because the speed is faster and the stability is reduced.
In addition, the tool angle needs to be selected reasonably. In order to reduce the bending deformation during processing, the cutting edge angle, rake angle and entering angle of the tool must be selected correctly during processing. The rake angle is generally controlled within the range of -10°～+10°, and the rake angle is generally 150°. On the premise of ensuring the strength of the turning tool, the rake angle should be increased appropriately, and the entering angle should also be selected. Slightly larger.