Valve body forging process

Abstract

The invention discloses a valve body forging process which comprises the following steps: S1, band saw blanking: first, checking and confirming quantity and boundary dimension of round bars for processing, carrying out blanking by using a horizontal band saw, wherein the maximum cross section width and height of the horizontal band saw are ranged at 400*350 mm, and then adjusting a carrier rack tobe consistent with the height of a worktable, wherein the blanking dimension precision is improved; S2, surface cleaning: first polishing and derusting the surfaces of cut round bars by means of a milling machine for primary surface treatment to remove rust on the surfaces, and then pickling the round bars for secondary surface treatment to remove oxide skin left on the surfaces of the round bars; S3, electric furnace heating: heating the round bars in stages by using an oven type electric furnace at a rated temperature of 1300 DEG C; and S4, upsetting pre-treatment: upsetting the round barsby using an air hammer, the weight of the falling part of which is 750 kg, to change the shapes of the round bars. The valve body forging process is relatively good in cleaning effect to surfaces of the round bars, improves the forging quality of a valve body and is better in forging effect by way of staged heating.

Description

Technical field

[0001] The invention relates to the field of valve body forging, in particular to a valve body forging process. Background technique

[0002] The valve body is a main part of the valve; according to the pressure level, there are different mechanical manufacturing methods, such as casting, forging, etc. The valve body of medium and low pressure specifications is usually produced by casting process, and the valve body of medium and high pressure specifications is forged Process production, the valve body, valve core and valve seat sealing ring can effectively withstand medium pressure after forming a seal; the material of the valve body is selected according to different process media, and different metal materials are selected. Common materials are: gray cast iron, ductile iron and carbon Plain steel etc. Among them, gray cast iron valves are used in various fields of industry due to their low price and wide range of applications. They are usually used in the case...