CN-121973027-A - Polishing processing method suitable for ultralow-temperature eccentric butt-clamping spiral fireproof butterfly valve

CN121973027ACN 121973027 ACN121973027 ACN 121973027ACN-121973027-A

Abstract

The invention relates to the technical field of ultralow temperature valve polishing, in particular to a polishing processing method for an eccentric butt-clamping spiral fireproof butterfly valve, which comprises the steps of adjusting and controlling first cryogenic duration according to first cryogenic duration adjusting quantity corresponding to a content exceeding value based on the fact that a residual austenite content value of a valve plate is larger than a preset content value, determining semi-fine polishing total quantity of semi-fine polishing according to first size changing rate of the valve plate after first cryogenic treatment, adjusting and controlling second cryogenic duration according to second cryogenic duration adjusting quantity corresponding to a width exceeding value based on the fact that a half-width value is larger than a preset half-width value, and adjusting and controlling first cryogenic duration adjusting quantity according to first correction coefficient corresponding to the change exceeding value based on the fact that the comprehensive changing rate is larger than a preset changing rate. According to the invention, the dynamic adjustment cryogenic treatment process is introduced in the grading polishing process to comprehensively adjust the quality stability of the product, so that the precision of the product is improved.

Inventors

XIA XINMEI
ZHU YONGHUI
WAN ZHILIANG
YU QUANWEI
HAN MENGJIE

Assignees

瑟维斯泵阀制造(浙江)有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. A polishing processing method for an eccentric butt-clamping spiral fireproof butterfly valve suitable for ultralow temperature is characterized by comprising the following steps of, The residual austenite content value based on the valve plate is larger than a preset content value, so that the first cryogenic duration is regulated and controlled according to a first cryogenic duration regulating quantity corresponding to a content exceeding value, wherein the content exceeding value is determined according to a difference value between the residual austenite content value and the preset content value; Determining the total semi-finish polishing amount of the semi-finish polishing according to the first dimensional change rate of the first cryogenic treatment rear valve plate; based on the fact that the half-width value is larger than the preset half-width, regulating and controlling the second cryogenic duration according to a second cryogenic duration regulating quantity corresponding to the width exceeding value, wherein the half-width value is determined according to diffraction pattern data of the surface of the valve plate after semi-finish polishing, and the width exceeding value is determined according to the difference value between the half-width value and the preset half-width; Based on the fact that the comprehensive change rate is larger than the preset change rate, the first cryogenic duration adjustment quantity is adjusted and controlled according to a first correction coefficient corresponding to the change exceeding value, wherein the comprehensive change rate is determined according to the second size change rate of the second cryogenic treatment post-valve plate and the first size change rate, and the change exceeding value is determined according to the comprehensive change rate and the preset change rate; Determining a total amount of refining of the refining process based on the second rate of change of dimension; Responding to the fact that the microscopic strain value is larger than a preset strain value, and regulating and controlling the semi-finishing polishing total amount according to a polishing correction coefficient corresponding to the strain exceeding value; The microscopic strain value is determined according to lattice microscopic strain on the surface of the valve plate after fine grinding processing, and the strain exceeding value is determined according to the microscopic strain value and a preset strain value.
2. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And responding to the residual austenite content value being larger than a preset content value, so as to regulate and control the increase of the first cryogenic time according to the first cryogenic time regulating quantity and the preset first cryogenic time, wherein the first cryogenic time regulating quantity and the content exceeding value are positively correlated.
3. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, In response to determining a semi-finished total amount of semi-finished finish according to the first dimensional change rate, the semi-finished total amount of finish is inversely related to the first dimensional change rate.
4. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And in response to regulating the second cryogenic time period, regulating the second cryogenic time period to increase according to a second cryogenic time period regulating quantity corresponding to the width exceeding value, wherein the second cryogenic time period regulating quantity is positively correlated with the width exceeding value.
5. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And responding to the first cryogenic duration adjustment quantity, and adjusting the first cryogenic duration adjustment quantity to increase according to a first correction coefficient corresponding to the change exceeding value, wherein the first correction coefficient is positively correlated with the change exceeding value.
6. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, In response to determining a total amount of refining of the refining process according to the second rate of change of dimension, the total amount of refining is inversely related to the second rate of change of dimension.
7. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And responding to the fact that the microscopic strain value is larger than the preset strain value, regulating and controlling the increase of the third cryogenic time according to the third cryogenic time regulating quantity corresponding to the strain exceeding value, wherein the third cryogenic time regulating quantity is positively correlated with the strain exceeding value.
8. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And responding to the fact that the microscopic strain value is larger than a preset strain value, regulating and controlling the total amount of semi-finishing polishing to be increased according to a polishing correction coefficient, wherein the polishing correction coefficient is positively correlated with the strain exceeding value.
9. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And in response to the microscopic strain value being greater than the preset strain value, regulating and controlling the second cryogenic time length regulating quantity to be increased according to a second correction coefficient corresponding to the strain exceeding value, wherein the second correction coefficient is positively correlated with the strain exceeding value.
10. The polishing method for the ultra-low temperature eccentric butt-clamping spiral fireproof butterfly valve, which is disclosed in claim 1, is characterized in that, And regulating and controlling a preset second cryogenic time length to be increased according to a first cryogenic time length deviation value based on the fact that the first cryogenic time length is longer than the critical cryogenic time length, wherein the first cryogenic time length deviation value is determined according to the first cryogenic time length and the critical cryogenic time length.

Description

Polishing processing method suitable for ultralow-temperature eccentric butt-clamping spiral fireproof butterfly valve Technical Field The invention relates to the technical field of ultralow temperature valve polishing, in particular to a polishing processing method for an eccentric butt-clamping spiral fireproof butterfly valve applicable to ultralow temperature. Background The valve is a pipeline accessory for controlling the functions of opening and closing a pipeline, flowing direction of fluid and the like, and generally has various functions of diversion, cut-off, throttling, check, pressure relief and the like. At present, the valve is used as a control component in a fluid conveying system, has extremely high requirements on precision, corrosion resistance and the like, and particularly, the valve used in an ultralow temperature environment needs to ensure the dimensional stability and precision of the valve in the ultralow temperature environment, so that the valve is usually polished after being molded. CN118061020a discloses a valve polishing machine and a polishing method thereof, wherein the polishing machine comprises a processing table, a clamping device and a polishing device, in order to achieve the purpose that the polishing machine can polish the inner side wall and the outer side wall of a valve body, the clamping device is arranged into an inner ring clamping module and an outer ring clamping module, and the outer ring clamping module and the inner ring clamping module can play a role in fixing and polishing the inner side wall of the valve body, so that the outer side wall and the inner side wall of the valve body can be polished without changing equipment when the valve body is polished, and the production efficiency is improved. Therefore, the valve grinding machine and the grinding method thereof have the following problems that the quality stability of the product is difficult to comprehensively adjust by introducing a dynamically adjusted cryogenic treatment process in the grading grinding process, and the precision of the product is improved. Disclosure of Invention Therefore, the invention provides a polishing processing method for an eccentric butt-clamping spiral fireproof butterfly valve, which is suitable for ultralow temperature, and is used for solving the problems that in the prior art, the quality stability of a product is comprehensively adjusted and the precision of the product is improved by introducing a dynamically adjusted cryogenic treatment process in the grading polishing process. In order to achieve the above purpose, the invention provides a polishing processing method for an eccentric butt-clamping spiral fireproof butterfly valve, which is applicable to ultralow temperature, and comprises the following steps, The residual austenite content value based on the valve plate is larger than a preset content value, so that the first cryogenic duration is regulated and controlled according to a first cryogenic duration regulating quantity corresponding to a content exceeding value, wherein the content exceeding value is determined according to the residual austenite content value and the preset content value; Determining the total semi-finish polishing amount of the semi-finish polishing according to the first dimensional change rate of the first cryogenic treatment rear valve plate; based on the fact that the half-width value is larger than the preset half-width, regulating and controlling the second cryogenic duration according to a second cryogenic duration regulating quantity corresponding to the width exceeding value, wherein the half-width value is determined according to diffraction pattern data of the surface of the valve plate after semi-finish polishing, and the width exceeding value is determined according to the difference value between the half-width value and the preset half-width; Based on the fact that the comprehensive change rate is larger than the preset change rate, the first cryogenic duration adjustment quantity is adjusted and controlled according to a first correction coefficient corresponding to the change exceeding value, wherein the comprehensive change rate is determined according to the second size change rate of the second cryogenic treatment post-valve plate and the first size change rate, and the change exceeding value is determined according to the comprehensive change rate and the preset change rate; Determining a total amount of refining of the refining process based on the second rate of change of dimension; Responding to the fact that the microscopic strain value is larger than a preset strain value, and regulating and controlling the semi-finishing polishing total amount according to a polishing correction coefficient corresponding to the strain exceeding value; The microscopic strain value is determined according to lattice microscopic strain on the surface of the valve plate after fine grinding processing, and the strain exce