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Processing method of valve core of multiway valve

A processing method and multi-way valve technology, which is applied in metal processing, manufacturing tools, heat treatment equipment, etc., can solve problems such as multi-way valve core deformation and cracking, and achieve the effect of improving stability

Inactive Publication Date: 2013-12-25
GUANGZHOU YUNTAI PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the multi-way valve spools in the warehouse are stored for a period of time, some of the multi-way valve spools are deformed or cracked

Method used

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  • Processing method of valve core of multiway valve
  • Processing method of valve core of multiway valve
  • Processing method of valve core of multiway valve

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Embodiment Construction

[0019] The application of the present invention in processing the valve core of a multi-way valve is described in detail.

[0020] In the processing of the multi-way valve core, the material to be processed is prepared first, and the material to be processed is 20CrMo, and the material to be processed is subjected to quenching and tempering treatment to make the internal structure of the material uniform and improve the machining performance. The semi-finished valve core is reserved for 0.25~ With a machining allowance of 0.35mm, the semi-finished valve core is carburized, quenched and high-temperature tempered, and then cooled to room temperature for low-temperature cold treatment, so that the surface hardness of the semi-finished valve core reaches HRC 58~62; the cold treatment medium is liquid nitrogen, The temperature of low-temperature cold treatment is -80~-83℃, and the holding time is 3~3.1 hours. During the process of low-temperature cold treatment, the residual austeni...

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Abstract

The invention discloses a processing method of a valve core of a multiway valve. The method mainly comprises the following steps including baiting, tempering treatment, coarse turning, carburization treatment, high-temperature tempering, low-temperature cold treatment, semi-finish machining, tempering and finish machining. The processing method has the advantages that semi-finished valve core products subjected to carburization, quenching and high-temperature tempering are placed into cold treatment media to be subjected to low-temperature cold treatment, residue austenite in internal tissues of the semi-finished valve core products can be eliminated through the low-temperature cold treatment, the tempering is carried out again after the semi-finish machining, the residue stress can be eliminated, and the stability is improved. The processing method is suitable for the processing of the valve core of the multiway valve.

Description

technical field [0001] The invention relates to a processing method in the field of mechanical processing research, in particular to a processing method for a valve core of a multi-way valve. Background technique [0002] High-pressure multi-way valve refers to a hydraulic multi-way valve with a working pressure greater than or equal to 28MPa, which is widely used in construction machinery, heavy weapon systems, deep-sea operations and other fields. With the rapid development of various construction projects in our country, the construction machinery industry has also achieved rapid development. However, the high-pressure multi-way valve seriously restricts the development of the construction machinery industry. High-pressure multi-way valve products, such products are completely imported from Japan, Germany, the United States and other countries. [0003] In the multi-way valve, the performance requirements of the multi-way valve spool are particularly strict, especially t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23P25/00C23F17/00C21D9/00
Inventor 陈荣熊艳伦
Owner GUANGZHOU YUNTAI PRECISION MACHINERY
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