When this kind of ball honing device is used, after the tool rest of the ordinary lathe is removed, the tool rest position wheel installed on the slide box is driven to rotate, and the combination of these two movements makes the abrasive particles on the slide box. After being expanded with a spring mandrel, the machined sphere is installed on the surface of the honed sphere to form a striated honing track. Here we are honing the two centers of an ordinary lathe. When honing, shake the number of revolutions of the hand grinding head and the ball on the slide box, which can be adjusted by the handle of the ball surface after honing test, so that the oilstone bar on the inner cone of the honing head meets the track and mass of the ball surface. Kerosene is used for cold contact in honing, and a certain pressure is exerted on the surface of the sphere through the action of the spring. In order to ensure that the oilstone bar can be in uniform contact with the surface of the sphere, the honing head adopts a floating structure, and the position of the rotation axis of the honing head relative to the ball center can be automatically corrected during honing by the action of the joint bearing and the ball head shaft. The sphere rotates under the drive of the machine tool spindle, and the honing head is lubricated in the belt through the ball head shaft, the center shaft and the rear shaft.

2. Multilayer sealing structure Multilayer sealing structure adopts soft and hard multi stack metal ring to fix the multi stack seal ring on the butterfly plate so that it does not bend and move, and effectively avoids the direct scouring of the media on the laminated seal ring. The sealing surface of the valve seat is welded with hard alloy electrode with excellent wear resistance, thus improving the service life of the butterfly valve. It has the double advantages of metal hard seal and elastic seal, and has excellent sealing performance no matter at high or low temperature. With the 3D eccentric structure design, there is almost no friction between the valve seat and the butterfly plate, and it has the sealing function of tightening as it closes. Plate structure