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Production technique of ball valve core

A production process and spool technology, applied in the field of ball valve spools, can solve problems such as waste of raw materials, and achieve the effects of reduced manufacturing costs, high surface finish, and good coordination.

Inactive Publication Date: 2009-04-01
YANGZHOU TIANHE POWDER METALLURGY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a new production process of ball valve spool, which solves the problem of waste of raw materials in the process of ball valve spool processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A production process of a ball valve spool, comprising the following steps:

[0019] ① Press molding:

[0020] Atomized iron powder with a particle size of 80 mesh and a content of 97wt%, with the remainder being impurities, is pressed into a ball valve spool blank in a press with a pressing force of 3T / cm 2 .

[0021] ②Sintering

[0022] 1) The ball valve spool blank is raised to 750°C within 40 minutes,

[0023] 2) Sintering at 750°C to 1540°C (the temperature is the melting point of iron) for 30 minutes,

[0024] 3) Cool slowly to below 60°C within 30 minutes.

[0025] ③ Plastic surgery

[0026] Regularize the roundness of the sintered ball valve core blank to improve its roundness and precision;

[0027] ④ Electroplating

[0028] Carry out sealing processing in molten zinc stearate solution with the shaped ball valve core blank;

[0029] Electroplating is carried out to improve its surface finish and wear resistance, and finally processed into a ball valve s...

Embodiment 2

[0031] The difference from the above-mentioned implementation 1 is: in the above-mentioned step 1, in the compression molding, the metal powder is reduced iron powder, the content is 90wt%, the particle size is 90 mesh, and the rest are impurities;

Embodiment 3

[0033] The difference from the above-mentioned implementation 1 is: in the above-mentioned step 1, in the compression molding, the metal powder is reduced iron powder, the particle size is 100 mesh, the content is 98wt%, and the rest is impurities;

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Abstract

The invention discloses a production process for a ball valve core, comprising the main steps as follows: (1) forming: iron powder or copper powder or stainless steel powder is reduced or pulverized; the particle size is 80-100 mesh and the content is 90-98wt%; the residual quantity is impurity; the ball valve core blank is prepared in a press by a die; (2) sintering: the ball valve core blank is heated to 700-800DEG C in 20min-1h, sintered for 30min-1h within the temperature range of 700DEG C to melting point temperature of the raw material and slowly cooled to the temperature below 60 DEG C in 30min-1.5h; (3) shaping: the roundness of the sintered ball valve core blank is rectified; 4 electro-plating: the shaped ball valve core blank is processed by hole-sealing in molten zinc stearate or molten white oil or molten silicone oil, then electro-plating is carried out and finally the ball valve core which complies with the requirement is obtained. The method saves the material and has low processing cost; the produced ball valve core has light weight and high surface smoothness.

Description

technical field [0001] The invention relates to a ball valve core, in particular to a production process of a powder metallurgy ball valve core. Background technique [0002] In the prior art, the commonly used processing method of the ball valve core is to cast / forge cast iron into a spherical blank, then grind it into a smooth spherical surface, and finally drill holes to make a qualified ball valve core. During the processing, a large amount of material is wasted due to the cutting process, and at the same time, the weight of the ball valve spool formed by this processing technology is relatively heavy, which affects its use environment. In addition, the cost of the existing processing technology is high. Contents of the invention [0003] The invention provides a new production process of the ball valve spool, which solves the problem of waste of raw materials in the current ball valve spool processing process. [0004] The present invention mainly comprises the follo...

Claims

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Application Information

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IPC IPC(8): B23P15/00B22F3/16C25D3/00F16K5/06F16K5/08
Inventor 赵忠平
Owner YANGZHOU TIANHE POWDER METALLURGY IND
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