What are the reasons for the deformation of the slender shaft in CNC machining?

In processing, the key reasons for the bending deformation of the turning slender shaft are:

(1) Deformation caused by cutting force. The degradability of cutting force during the whole turning process is: radial cutting force, axial cutting force Fp and main cutting force Fzc. Different cutting forces cause different damage to the bending deformation of the slender shaft. Radial cutting force F,. The harm. The radial cutting force is the force on the centerline of the slender shaft with the effect of the parallel plane. When the radial cutting force exceeds a certain value, the slender shaft will be bent, which will cause the product workpiece to produce vertical bending deformation (generally short Shaft processing can be ignored, it is not very harmful to the bending deformation of the product workpiece). The hazard of axial cutting force FP (see Figure 2). The axial cutting force is the vertical function in the horizontal plan according to the center line of the slender shaft. CNC machining in Dongguan City. Because the rigidity of the slender shaft is poor, the axial force may bend the slender shaft. Bending deformation occurs in the plane.

(2) Harm caused by drilling heat. During turning, due to the hazards of drilling heat, the product workpiece gradually stretches and deforms as the temperature rises. The outstanding technical engineer of five-axis CNC machining calls this type of condition called thermal deformation. The formula for the thermal extension of the length of the product workpiece is calculated according to the above formula, and the product workpiece hanger stretches 0.267mm during processing.

When turning, the hydraulic chuck and the top of the tailstock are fixed, and CNC machining, so the distance between each other will not change, because the stretch of the slender shaft is limited after being heated, which causes the slender shaft Bending deformation caused by extrusion molding. Therefore, to improve the processing precision of the slender shaft, it is necessary to deal with the endurance of the processing technology system software and thermal deformation.