Processing of the inner spherical surface of the bearing seat (bearing spherical surface processing):
A boring bar was designed and manufactured to process the inner spherical surface of the bearing seat. It is installed on a lathe and uses general equipment to solve the technical key of producing bearing seats.
The tool bar 3 is installed in the long slot of the boring bar 1 with the shaft 4. The boring bar 1 is clamped by a three-jaw chuck and supported by a special center 15. One end clamps the cutter head 5, and the other end is connected to the connecting rod 6 through the pin 2. The other end of connecting rod 6 is connected to nut 8 through pin 7. Turning the screw 9 moves the nut 8 into the dovetail of the boring bar 1. T20 1.5 left-hand screw, 9 tile base, 10 holes for rotation. The tile seat 10 is fastened to the right end of the boring bar 1 by bolts 16. Gear 11 m=2 z=31 x=-0.5 is fixed on the right end of screw rod 9 through flat key 12 washer 13 nut 14. When boring bar 1 rotates, gear 11 rotates around special center 15. The center 15 is milled with m=2 z=12 x=0.5 teeth, so the gear 11 rotates, thereby driving the screw rod 9 to rotate, causing the screw nut 8 to move up the boring bar through the pin 7, the connecting rod 6, and the pin 2 drives the tool bar 3 and With axis 4 as the center of the circle, the tool head 5 moves in an arc left and right in the long groove of the boring bar to complete the processing of the inner spherical surface.
First use an ordinary boring bar to boring the ?164 inner hole and both sides of the end face. Operation method: fasten the workpiece on the large slide plate of the lathe. Then use boring bar 1 to boring the inner spherical surface. According to the machining allowance of the spherical hole and the cutting depth, determine the extended length of the cutter head 5, and tighten the cutter head with screws. Move the slide plate to align the center of the workpiece with the center of axis 4, and tighten the large slide plate. Turn the machine on so that the spindle rotates the tool head 5 forward and around the axis 4 from right to left. Start cutting and boring after one cut, then stop. Shake the large slide to move the workpiece away from the tool bar. Loosen the fastening screw, take out the tool head, and turn it over. (Making the front blade face down) Put it into the tool holder and extend the cutter head to a certain cutting depth. After tightening the cutter head, shake the large slide plate back to its original position and tighten it. Turn the machine in reverse, and the cutter head begins to rotate and cut from left to right. Repeat several times until the machine reaches the appropriate size.
To improve surface quality. Recommended for rough boring. The main declination angle f and the secondary declination angle f1 of the tool are both 45°. During fine boring, the tool tip must be ground to have an R95 R100 arc edge.
