Method for detecting surface dents of valve body
A body surface and valve detection technology, which is applied in the direction of mechanical valve testing, material magnetic variables, etc., can solve the problems of magnetic powder remaining in the valve body and increase the difficulty of the cleaning process, and achieve the effect of reducing loss
Active Publication Date: 2019-11-15
广东省铭鸿通风设备有限公司
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Problems solved by technology
[0003] The valve includes a valve body and a valve core. The valve body is the shell of the valve. The processing of the valve body has a direct impact on the quality of the valve. The detection of the valve body after production is essential; usually the detection method of the valve body is non-destructive testing, and magnetic particle inspection is one of the methods. During magnetic particle inspection, magnetic powder needs to be sprinkled on the surface of the valve body. There is a cavity, and the magnetic powder is easy to enter the valve body when spraying, and the magnetic powder is easy to remain in the valve body, which increases the difficulty of the later cleaning process
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[0034]A method for detecting dents on the surface of a valve body, comprising: a. putting the casted valve body into a cleaning pool, cleaning the surface of the valve body, and removing grease from the surface of the processed valve body; b. The valve body is dried so that the valve body is in a dry state; c. Put the dried valve body into the flaw detection equipment, and spray the magnetic powder on the surface of the valve body for flaw detection to determine whether there are defects on the surface of the valve body; d. Mark the detected defects to remove the dents on the surface, and then perform a second inspection on the valve body until there are no dents on the valve body; e. Demagnetize the valve body to make the valve body The magnetism on the surface is eliminated; f, the valve body after demagnetization is cleaned to remove the magnetic powder remaining on the surface; the drying method in the step b is to put the cleaned valve body into a drying box and keep it in...
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The invention discloses a method for detecting surface dents of a valve body. The method comprises the following steps: a, putting a cast valve body into a cleaning tank, cleaning the surface of the valve body, and removing grease from the surface of the valve body; b, drying the cleaned valve body to make the valve body in a dry state; c, putting the dried valve body into flaw detection equipment, and performing flaw detection treatment on the surface of the valve body by spraying magnetic powder to determine whether defects exist on the surface of the valve body; d, marking the detected defects to remove surface dents, and performing secondary flaw detection on the valve body until no dents areleft on the valve body; e, demagnetizing the valve body to eliminate magnetism on the valve body; f, cleaning the demagnetized valve body to remove residual magnetic powder on the surface.
Description
technical field [0001] The invention belongs to the technical field of valve processing, and in particular relates to a method for detecting dents on the surface of a valve body. Background technique [0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve and so on. [0003] The valve includes a valve body and a valve core. The valve body is the shell of the valve. The processing of the valve body has a direct impact on the quality of the valve. The detection of the valve body after production is essential; usually the detection method of the valve body is non-destructive testing, and magnetic particle inspection is one of the methods. During magnetic particle inspection, magnetic powder needs to be sprinkled on the surface of the valve body. The...
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Login to View More IPC IPC(8): G01N27/84G01M13/003
CPCG01N27/84G01M13/003Y02E30/30
Inventor 董服义
Owner 广东省铭鸿通风设备有限公司