Manufacture of ball of ball valve

Abstract

A technology for manufacturing the spheraial plug of ball valve includes such technological steps as die-punching a circular pipe to directly obtain a spherial shell with circular holes at both sides, punching said sperical shell to form a clamping slot for valve rod, welding circular tube,whose external diameter is equal to the diameter of said circular hole and whose length is equal to that of flowing channel of the spherical plug, to the circular holes at both sides, correcting its roundness, and polishing its surface. Said spherical plug's advantages includes light weight, low cost, high compression strength and easy manufacture.

Description

technical field [0001] The invention relates to a manufacturing method of a ball plug used in a ball valve switch in the field of general engineering faucets or cocks, in particular to a method of directly punching a round pipe into a ball shell with holes on both sides by means of a die, and then An innovative ball valve manufacturing method that welds the middle tube to the ball shell to form a hollow ball plug. Background technique [0002] see Figure 5 As shown, the ball plug A of the ball valve (Ball) is a spherical structure with a passage A1 running through one axis, and a locking groove A2 is formed at an appropriate position on the peripheral surface of the ball plug A for the locking and actuation of the valve stem. ;Because the ball plug is a spherical structure with a flow channel through the axis, it is generally used to manufacture the rough blank of the ball plug by casting, and then through the finishing steps such as turning and polishing to manufacture a s...

AI Technical Summary

Problems solved by technology

[0005] 1. The manufacturing process is not streamlined enough and the difficulty is high:

[0006] In the above-mentioned existing ball plug manufacturing method, the spherical shell is composed of two hemispherical shells butted and welded. Since each hemispherical shell must go through the processing steps of punching die and edge trimming, and then welding combination, the manufacturing process Obviously it is not streamlined enough, especially the edges of the two hemispherical shells should be precisely cut into the shape of a regular hemispherical shell, and then after roundness correction and surface polishing and finishing, the two hemispherical shells can be precisely aligned to form a high roundness Spherical shell, this process is quite cumbersome and difficult

[0007] 2. Poor structural strength:

[0008] The spherical shell of the aforementioned existing ball plug manufacturing method is composed of two hemispherical shells butted and welded, so that the structural strength of the entire ball plug is not ideal.

[0009] This shows that there are still many drawbacks in the above-mentioned existing ball plug manufacturing method, and it needs to be improved.

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