Generally, the pneumatic ball valve ball with high surface roughness and geometric accuracy requirements shall be polished after finishing. At present, for the final finishing of large diameter ball, our factory usually uses the abrasive belt grinding process on the special ball turning machine tool. Due to the limitation of the structure of the belt grinding device, the final finishing of small diameter spheres is generally done by hand grinding, but this process method often fails to meet the needs of practical use in terms of efficiency and quality. For this reason, we have designed a device for honing ball on C620 ordinary lathe, and the effect is good through verification. The ball honing device is mainly composed of a rear axle, a middle axle, a spherical joint bearing, a ball head axle, a spring, a honing head, a frame assembly, etc. The honing head is made of metal in the shape of a bowl. The inner cone of the metal bowl can be inlaid with resin as many as possible according to the specific situation. The particle size and hardness of oilstone strips can be selected according to different ball materials and surface roughness. The surface of the bonded oilstone strip shall be corrected on an ordinary lathe. 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. This honing process is very similar to grinding process, but also has complex processes such as cutting and scraping. A small amount of roundness error left in the previous process of the sphere. The large part always contacts the inner cone of the oilstone bar first during honing, compared with the larger pressure there. Therefore, the error part is soon honed off, so it has a certain correction effect on the roundness error. Because the honing head has a large yield, the honing pressure is low, The blind grain has small cutting depth and fine abrasive grain size

In which industries can plastic coated pneumatic butterfly valves be used
At present, there are many kinds of transmission equipment products. For example, many of these products are equipped with more and more lines. Therefore, the protection of this transmission line should also be paid attention to to ensure that there will be no more problems when the entire transmission line is used. It is very necessary to choose such a maintenance enclosure, Therefore, the application of plastic coated pneumatic butterfly valve is particularly important. The application of this product can well ensure the safety and integrity of the internal transmission line.
For the application of this plastic coated pneumatic butterfly valve, it is especially widely used in many petrochemical industries, and also in some large machinery. In addition, for industries such as power and communication, it is also necessary to use this kind of protective hose equipment, which can better ensure that there will be no more problems in the application process, As for the application of this product in these different industries, the quality of the shell maintenance product and the characteristics of the PVC material coated on the outside must be strictly guaranteed to ensure that there will be no more problems during the application of the entire hose.
Therefore, it is a good choice to choose this plastic coated pneumatic butterfly valve, which can better improve and ensure the application ability of the whole pipeline, and will not present more problems in the application process.