CN103464968A - Processing method of valve core of multiway valve - Google Patents
Processing method of valve core of multiway valve Download PDFInfo
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- CN103464968A CN103464968A CN 201210184408 CN201210184408A CN103464968A CN 103464968 A CN103464968 A CN 103464968A CN 201210184408 CN201210184408 CN 201210184408 CN 201210184408 A CN201210184408 A CN 201210184408A CN 103464968 A CN103464968 A CN 103464968A
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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
The present invention relates to a kind of processing method in the machining research field, particularly a kind of processing method of banked direction control valves spool.
Background technology
The high-pressure multi-path valve refers to that operating pressure is more than or equal to the hydraulic multitandem valve of 28MPa, is widely used in engineering machinery, heavy weapon system, deep ocean work etc. field.Along with developing rapidly of the every building cause of China, construction machinery industry has also been obtained development at full speed, yet the high-pressure multi-path valve is seriously restricting the development of construction machinery industry, its main cause is domesticly at present also to fail to produce the high-pressure multi-path valve product that is applicable to excavator, and this series products relies on fully from national imports such as Japan, Germany, the U.S..
In banked direction control valves, strict especially to the performance requirement of banked direction control valves spool, especially the dimensional accuracy of banked direction control valves spool has requirement.The material of existing banked direction control valves spool is generally 20CrMo, its processing method is generally according to following flow process: prepare material to be processed, and treat rapidoprint and carry out modifier treatment, after reducing the hardness of material to be processed, press drawing rough turn to the semi-finished product spool, to the rough turn carburizing and quenching that carries out, after making the case hardness of semi-finished product spool reach 58-62HRC, fine grinding semi-finished product spool, after to be processed completing, spool is carried out to antirust processing, and the whole processing that has completed the banked direction control valves spool is processed, and the banked direction control valves spool processed is put into to warehouse and deposit.
Yet, after the banked direction control valves spool in warehouse is deposited a period of time, part banked direction control valves spool deforms or ftractures.This distortion or cracking are mainly because the internal stress produced in machining process and heat treatment is not eliminated and caused in time.
Summary of the invention
Purpose of the present invention, be to provide the processing method of banked direction control valves spool.
The scheme that the present invention solves its technical problem is: a kind of processing method of banked direction control valves spool comprises the following steps:
1) prepare material to be processed;
2) material to be processed is carried out to modifier treatment;
3) by the rough turn one-tenth semi-finished product of material to be processed spool;
4) the semi-finished product spool is carried out to carburizing, quenching and high tempering and process, after the case hardness of semi-finished product spool being reached specify numerical value, the semi-finished product spool is placed in the cold treatment medium and carries out cold treatment;
5) the semi-finished product spool is carried out to semifinishing;
6) the semi-finished product spool after semifinishing is carried out to temper;
7) the semi-finished product spool after tempering is refined to specified size.
As further improvement in the technical proposal, in step 4), the case hardness of semi-finished product spool is HRC58 ~ 62.
As further improvement in the technical proposal, in step 4), described cold treatment medium is liquid nitrogen, and the temperature of described cold treatment is-80 ~-83 ℃, and temperature retention time is 3 ~ 3.1 hours.
As further improvement in the technical proposal, in step 6), the temperature of described temper is 315 ~ 320 ℃, and temperature retention time is 5 ~ 5.1 hours.
The invention has the beneficial effects as follows: the present invention inserts in the cold treatment medium and carries out cold treatment by the semi-finished product spool after carburizing, quenching and high tempering are processed, cold treatment can be eliminated unsettled austenite residual in the interior tissue of semi-finished product spool, the residualinternal stress of interior tissue is eliminated in semifinishing by temper, improve its stability.
The present invention is applicable to the processing of banked direction control valves spool.
The specific embodiment
Describe the application of the present invention in processing banked direction control valves spool in detail.
In the processing of banked direction control valves spool, first prepare material to be processed, material to be processed is 20CrMo, material to be processed is carried out to modifier treatment, make material inside organization even, improve machinability, the allowance of the reserved 0.25～0.35mm of this semi-finished product spool, the semi-finished product spool is carried out to carburizing, quenching and high tempering is processed, carry out cold treatment after being cooled to normal temperature, make the case hardness of semi-finished product spool reach HRC 58 ~ 62; This cold treatment medium is liquid nitrogen, the temperature of cold treatment is-80 ~-83 ℃, temperature retention time is 3 ~ 3.1 hours, in the process of cold treatment, retained austenite in the interior tissue of semi-finished product spool is eliminated, the semi-finished product spool is carried out to semifinishing, and the surplus of reserved 0.1～0.15mm; Semi-finished product spool after semifinishing is carried out to temper, this temperature is 315 ~ 320 ℃, temperature retention time is 5 ~ 5.1 hours, eliminate residualinternal stress, increase substantially its stability, after tempering, the fine finishining spool is to requiring, complete the processing of banked direction control valves spool, after the finished product spool is carried out to antirust processing, finished product spool warehouse-in is deposited.
More than that better embodiment of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modifications or replacement under the prerequisite without prejudice to spirit of the present invention, and the modification that these are equal to or replacement all are included in the application's claim limited range.
Claims (4)
1. the processing method of a banked direction control valves spool is characterized in that: comprise the following steps:
1) prepare material to be processed;
2) material to be processed is carried out to modifier treatment;
3) by the rough turn one-tenth semi-finished product of material to be processed spool;
4) the semi-finished product spool is carried out to carburizing, quenching and high tempering and process, after the case hardness of semi-finished product spool being reached specify numerical value, the semi-finished product spool is placed in the cold treatment medium and carries out cold treatment;
5) the semi-finished product spool is carried out to semifinishing;
6) the semi-finished product spool after semifinishing is carried out to temper;
7) the semi-finished product spool after tempering is refined to specified size.
2. the processing method of banked direction control valves spool according to claim 1, it is characterized in that: in step 4), the case hardness of semi-finished product spool is 58 ~ 62HRC.
3. the processing method of banked direction control valves spool according to claim 1, it is characterized in that: in step 4), described cold treatment medium is liquid nitrogen, and the temperature of described cold treatment is-80 ~-83 ℃, and temperature retention time is 3 ~ 3.1 hours.
4. the processing method of banked direction control valves spool according to claim 1, it is characterized in that: in step 6), the temperature of described temper is 315 ~ 320 ℃, and temperature retention time is 5 ~ 5.1 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210184408 CN103464968A (en) | 2012-06-06 | 2012-06-06 | Processing method of valve core of multiway valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210184408 CN103464968A (en) | 2012-06-06 | 2012-06-06 | Processing method of valve core of multiway valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103464968A true CN103464968A (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201210184408 Pending CN103464968A (en) | 2012-06-06 | 2012-06-06 | Processing method of valve core of multiway valve |
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| CN (1) | CN103464968A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057247A (en) * | 2014-05-30 | 2014-09-24 | 太仓美晶机械制造有限公司 | Manufacturing method for precise valve element of hydraulic servo valve |
| CN105033570A (en) * | 2015-06-02 | 2015-11-11 | 无锡阳工机械制造有限公司 | Machining method for valve element of reversing valve |
| CN105420467A (en) * | 2015-11-10 | 2016-03-23 | 宁波市鸿博机械制造有限公司 | Manufacturing method for steel slide valve |
| CN105537885A (en) * | 2016-03-03 | 2016-05-04 | 布志刚 | Machining method of valve element |
| CN108098260A (en) * | 2017-11-06 | 2018-06-01 | 无锡鹰贝精密轴承有限公司 | Cross bore spool manufacturing method |
| CN111331320A (en) * | 2020-03-19 | 2020-06-26 | 无锡鹰贝精密轴承有限公司 | High-precision valve element and preparation method and application thereof |
| CN111468891A (en) * | 2020-03-17 | 2020-07-31 | 无锡鹰贝精密轴承有限公司 | Production process of high-precision deep-hole valve element |
-
2012
- 2012-06-06 CN CN 201210184408 patent/CN103464968A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057247A (en) * | 2014-05-30 | 2014-09-24 | 太仓美晶机械制造有限公司 | Manufacturing method for precise valve element of hydraulic servo valve |
| CN105033570A (en) * | 2015-06-02 | 2015-11-11 | 无锡阳工机械制造有限公司 | Machining method for valve element of reversing valve |
| CN105420467A (en) * | 2015-11-10 | 2016-03-23 | 宁波市鸿博机械制造有限公司 | Manufacturing method for steel slide valve |
| CN105537885A (en) * | 2016-03-03 | 2016-05-04 | 布志刚 | Machining method of valve element |
| CN108098260A (en) * | 2017-11-06 | 2018-06-01 | 无锡鹰贝精密轴承有限公司 | Cross bore spool manufacturing method |
| CN111468891A (en) * | 2020-03-17 | 2020-07-31 | 无锡鹰贝精密轴承有限公司 | Production process of high-precision deep-hole valve element |
| CN111468891B (en) * | 2020-03-17 | 2021-10-19 | 无锡鹰贝精密液压有限公司 | Production process of high-precision deep-hole valve element |
| CN111331320A (en) * | 2020-03-19 | 2020-06-26 | 无锡鹰贝精密轴承有限公司 | High-precision valve element and preparation method and application thereof |
| CN111331320B (en) * | 2020-03-19 | 2022-02-15 | 无锡鹰贝精密液压有限公司 | High-precision valve element and preparation method and application thereof |
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Application publication date: 20131225 |