Figure 5 Figure 6 It can be seen from the graph that when the gas pressure is ≥0.6MPa, the spindle rotates smoothly, the axial movement is smooth, and the resistance is very small. The test spindle radial runout is less than 0.015mm (from 60mm from the end of the bushing of Figure 7) under the pressure of 0.6~1.2MPa, the effect is very satisfactory. (4) Clamping section The HDT sharpener uses the internationally accepted 5C collet (Figure 8). Its main advantages are: 1 wide range of use The 5C collet has been widely used in many fields, and the international standards are uniform and common. Figure 8 2 clamping range large round hole The 5C collet can be clamped to a maximum of 28mm. The Morse taper 5C collet can hold the MS1~MS4 taper shank tool, which is very suitable for the clamping of the end mill. 3 high precision The general accuracy of the 5C collet is about 0.01mm, while the accuracy of the precision grade 5C collet can reach 0.005mm. 4 easy to operate The 5C chuck is a pull-back chuck. When it is used, after the tool is placed, the rod can be clamped by tightening the rod, which saves time and labor and is very simple. Previous page next page Measuring Tape,Meter Measuring Tape,Steel Measuring Tape,Stainless Steel Measuring Tape Henan Yuanli Tools Co.,Ltd , https://www.hnyuanlitools.com
If the center of the spindle deviates downward from the center of the sleeve by Δh, the gap between the shaft and the sleeve is not uniform (see Figure 5). A so-called "sticking" phenomenon occurs, in which the discharge flow of each throttle intake hole is not the same, and it is obvious that the gas flow rate q2 of the upper intake port is larger than the gas flow rate q1 of the lower intake port. According to the throttling principle, the pressure of the gas with a large flow rate is much lower after the throttling, and the pressure of the gas with a small flow rate is reduced after the throttling. At this time, although the air pressure ps outside the bushing is the same, the pressure on the circumference of the main shaft is not uniform (Fig. 6). This unbalanced force can just move the main shaft to eliminate the "sticking" phenomenon, and the spindle can automatically Centered, with high precision. At the same time, since the shaft and the sleeve are filled with compressed gas, the shaft is suspended in the sleeve, and the movement resistance is very small. It is found through experiments that the gas pressure ps and the spindle torque T are in a curve relationship as shown in FIG. 
