Casting production technology of valve body

Abstract

The invention relates to a casting production technology of a valve body. The production technology comprises the following steps in turn: preparing a mould, preparing a sand mould, performing core setting, smelting, pouring and performing subsequent operations, wherein the preparation of the sand mould comprises the following steps: firstly filling moulding sands in the mould, secondly ramming moulding sands to complete modeling and installing a charging hole on the completed model; smelting comprises the following steps: firstly selecting material according to the demand of the casting, secondly adding alloy element in molten iron and thirdly performing inoculation when molten iron is discharged; and pouring comprises the following steps: firstly injecting molten iron in an impression, wherein the pouring temperature is 1380-1440 DEG C and the pouring time is 8-20 seconds; and secondly keeping temperature for 40-80 minutes, wherein the production yield is 40%-60%. The casting production technology of the invention has better pouring quality, the density of the casting is uniform; and the sand mould is not easy to crack and has wider application range.

Description

technical field [0001] The invention relates to a production method of a valve body, in particular to a casting production process of a valve body, and is particularly suitable for integral casting of a metal valve body. Background technique [0002] The valve body is a major part of the valve, which can effectively withstand the medium pressure after forming a seal with the valve core, valve seat and sealing ring. The material of the valve body is based on different process media, and different metal materials are selected. The commonly used materials are cast iron, cast steel, stainless steel, carbon steel, etc. According to the different pressure levels, the valve body has different manufacturing methods, mainly including casting and forging. [0003] The Chinese patent publication number is CN101745606A, and the disclosure date is June 23, 2010. The invention patent discloses a high-rigidity gray iron hydraulic valve valve body casting process method, including: using m...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems existing in the prior art that sand molds are prone to cracks, poor pouring quality, uneven casting density, and small application range, and provide a sand mold that is not prone to cracks, good pouring quality, and high casting density. Casting production process of uniform valve body with wide application range