A processing method for the ball body of a hard-sealed double eccentric ball valve

Abstract

The invention proposes a method for processing hard-sealed double eccentric ball valves, which belongs to the field of ball valve processing and can realize the processing of hard-sealed double eccentric ball valves. Avoid the amount of waste during processing and save costs; and with the help of auxiliary tooling, the sphere is fixedly installed on the machine tool, and the connection line between the spindle of the machine tool and the top of the tailstock is concentric with the sphere, thus ensuring the accuracy of the spherical surface finish.

Description

technical field [0001] The invention relates to the field of processing ball valve spheres, in particular to a processing method for hard-sealed double eccentric ball valve spheres. Background technique [0002] Ball valve, the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids, among which the hard-sealed V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal valve seat of surfacing welding carbide, and is especially suitable for fibers and tiny solid particles. etc. medium. [0003] In the production process of ball valve balls, the balls are divided into floating balls, fixed balls, double handle balls, etc. according to the type. The conventional ball means that the spherical surface, hole, handle, etc. are generally in one center, so it is relatively easy to process; and for For eccentric spheres, some shanks are not c...

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Problems solved by technology

[0003] In the production process of ball valve balls, the balls are divided into floating balls, fixed balls, double handle balls, etc. according to the type. The conventional ball means that the spherical surface, hole, handle, etc. are generally in one center, so it is relatively easy to process; and for For eccentric spheres, some shanks are not concentric with the spherical surface, and some are not concentric with the inner hole and the spherical surface. The processing difficulty of the sphere is relatively more difficult, and it is even more difficult to process the double eccentric sphere with the handle and the spherical surface not concentric and the inner hole and the spherical surface. For the processing of this kind of double eccentric sphere, the conventional method is to process the shank first, then drill the eccentric process hole on the two shanks, and then process the spherical surface against the eccentric process hole. The processed spherical surface is eccentric to the shank. This method needs to specially increase the margin of the outer circle, thus increasing the cost

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