Manufacturing process of valve ball

Abstract

The invention discloses a technology for manufacturing a valve ball. The technology comprises the following steps of selecting and sawing off a specially-shaped copper pipe and a circular copper pipe, wherein a reinforcement block is arranged on the inner circumferential surface of the specially-shaped copper pipe; shortening the reinforcement block, and forming a small hole in the center axial line of the reinforcement block; forging the specially-shaped copper pipe into a spherical copper pipe; processing an inner hole and an outer circle of the spherical copper pipe; squeezing the circular copper pipe into the spherical copper pipe; welding the circular copper pipe with the spherical copper pipe; processing the outer circumferential surface of the valve ball into a required size, and smoothing a welded part; forming a valve rod connection slot around the small hole, serving as a center, of the valve ball; performing polishing. The technology has the advantages that the valve ball is formed by welding the copper pipes; by the adoption of the mode, the wall thickness of the welded part is uniform, and higher pressure can be borne. The produced valve ball is high in density; the formation of an air hole in casting is effectively realized, and the quality of a product is improved; some pieces of waste copper obtained by processing can be recycled and reused, so that the cost is saved, and pollution, caused by metal elements, to the environment can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of ball valves, and in particular relates to a manufacturing process of a valve ball. Background technique [0002] As one of the main accessories of the ball valve, the valve ball mainly controls the water inlet and outlet of the ball valve. The existing valve ball is mainly formed into a rough by casting, and then made into a finished product by finishing. But there are some defects in this product formed by casting: 1. Pollution to the environment: because the circular tube inside it is made of raw materials such as coated sand and quartz sand, it will volatilize pollutants when pouring, which not only affects The pouring workers are not only healthy, but also cause environmental pollution; after casting and filling, some waste sand can no longer be recycled, and the common practice of manufacturers is to pile it aside, causing metal pollution; 2. Short service life: due to There will be some pores on t...

AI Technical Summary

Problems solved by technology

But there are some defects in this product formed by casting: 1. Pollution to the environment: because the circular tube inside it is made of raw materials such as coated sand and quartz sand, it will volatilize pollutants when pouring, which not only affects Pouring workers are not only healthy, but also cause environmental pollution; after casting filling is completed, some waste sand can no longer be recycled, and the common practice of manufacturers is to pile it aside, causing metal pollution; 2. Short service life: due to There will be some pores on the surface of the cast product, which will cause quality defects; the wall thickness is uneven, and the wall thickness at the joint with the copper tube cannot be guaranteed when casting and pouring, which will not only affect the service life, but also may cause damage during use. Causes water leakage and poses a safety hazard; therefore it is necessary to improve