Flame remelting device for valve ball core

Abstract

The invention relates to a flame remelting device for a valve ball core. The flame remelting device is characterized by comprising a core shaft (5), the ball core (3) to be machined is arranged on the core shaft (5) in a sleeving mode, one end of the core shaft (5) is arranged on a supporting frame (6), the other end of the core shaft (5) is arranged on a chuck which is connected with a driving motor driver (1) in a transmission mode so that the core shaft (5) and the ball core (3) can be driven to rotate; an oxyacetylene remelting gun (2) is arranged above the ball core (3), and a high-power gas combustor (4) is arranged on the side face of the ball core (3). By means of the flame remelting device, the quality problems that due to the fact that valve ball cores of DN200 or higher are large in size and large in heat absorption, fusing sintering time of the unit area is too long in the fusion covering process, an alloy powder layer is too high in local temperature, stress between a ball core base body and a fusion covering layer is too large, oxidation is severe, and defects between the fusion covering layer and the ball core base body are increased are effectively solved.

Description

technical field [0001] The invention relates to a flame remelting device for a valve ball core. Background technique [0002] At present, the flame cladding process on the surface of the valve core above DN200 generally uses a flame gun to flame clad the powder-sprayed ball core. However, due to the large size and large heat absorption of the valve core above DN200, the unit area The longer the cladding time, the local temperature of the spherical surface is too high, the oxidation of the base material and the coating is aggravated, the stress of the ball core is increased, the surface of the cladding is burned seriously, and the cladding layer is seriously defective. Contents of the invention [0003] The purpose of the present invention is to provide a flame remelting device for valve ball cores, which can greatly improve the quality of cladding layers of valve ball cores above DN200. [0004] A flame remelting device for a valve core, which is special in that it includ...

AI Technical Summary

Problems solved by technology

[0002] At present, the flame cladding process on the surface of the valve core above DN200 generally uses a flame gun to flame clad the powder-sprayed ball core. However, due to the large size and large heat absorption of the valve core above DN200, the unit area Prolonged cladding time will cause the local temperature of the spherical surface to be too high, the oxidation of the base material and coating will increase, the stress of the ball core will increase, the surface of the cladding layer will be burned seriously, and the cladding layer will be severely damaged.

Images