CN103769800A - Manufacture process for ball valve ball casing - Google Patents
Manufacture process for ball valve ball casing Download PDFInfo
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- CN103769800A CN103769800A CN201210403734.5A CN201210403734A CN103769800A CN 103769800 A CN103769800 A CN 103769800A CN 201210403734 A CN201210403734 A CN 201210403734A CN 103769800 A CN103769800 A CN 103769800A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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Abstract
The invention discloses a manufacture process for a ball valve ball casing. The manufacture process comprises thinning a disc steel plate meeting detection standards, heating the disc steel plate in a furnace to be punched to form a cylindrical blank, performing local heating on the bottom of the cylindrical blank for small hole punching, and performing normalizing heat treatment on products to recover product mechanical performances. According to the manufacture process, the thickness of the valve casing inside protruding cambered surface is not lower than 47mm, the good re-machining performance of the valve casing inside protruding cambered surface can be guaranteed, and a valve body is high in strength and long in service life.
Description
technical field
The present invention relates to a kind of ball valve process technology, be specifically related to a kind of spherical shell manufacture craft of ball valve.
Background technology
In ball valve manufacturing process, the difficulty of processing of valve casing is embodied in the convex globoidal structure of its inner side, and the performance of this structure is one of major criterion judging ball valve quality.Inside the valve casing of finished product ball valve, convex globoidal mates in order to reach with steel ball the object contacting completely, conventionally need to many annular step grooves be set from top to bottom to convex globoidal, coupling embedding sealing material in the step groove of each annular.But, after the spherical shell processing of existing ball valve, the poor-performing such as thickness and flatness and density of its internal layer convex globoidal, causing at processing ring-shaped step groove is to have larger difficulty, even causes the situation that valve casing is scrapped to happen occasionally because can't process annular table terrace.
Summary of the invention
The present invention, for the spherical shell that solves existing ball valve affects the problem of quality because processing technology exists defect, provides a kind of spherical shell manufacture craft of ball valve.
Technical scheme: a kind of spherical shell manufacture craft of ball valve, comprises the following steps:
(1) selection meets the steel plate blank of examination criteria, and the steel plate blank that is 52～58mm by thickness on blank machine cuts into discoid;
(2) circumferential edges of disk upper side is carried out to skiving and be processed to form circular cone, the cone angle scope of this circular cone is 0.8～1.0 °;
(3) after being heated to 800～1000 ℃, skiving disk after treatment on forcing press, carries out punching press, the diameter of mold drift sphere when punching press is 766～774mm, bed die is the annular cushion block of interior diameter 876～884mm, the tubbiness blank of suppressing rear formation is carried out to size detection, guarantee that the interior diameter scope of this tubular blank is at 768～774mm, overall diameter scope 878～886mm mm, thickness range 53～57mm;
(4) local heat is carried out in the bottom of tubular blank in step (3), make its bottom temp remain on 850～1100 ℃, on forcing press, osculum punching is carried out in the bottom of the tubular blank after heating, the spherical diameter of the mold drift that punching adopts is 476～482mm, bed die is the annular cushion block of interior diameter 587～592mm, valve casing blank dimension after moulding is detected, the osculum interior diameter of guaranteeing punching is 478～482mm, overall diameter is 588～592mm, and osculum is 73～76mm to the straight flange width of downward-extension;
(5) product normalizing heat treatment is recovered to product mechanical property, when normalizing, product charging temperature is less than or equal to 500 ℃ and is warming up to gradually 900～930 ℃, and programming rate is less than or equal to 150 ℃/h, be then incubated 120～135 minutes after gradually cooling come out of the stove;
(6) align burning hot product after treatment and carry out surface treatment complete examination.
In step (2), the cone angle scope of circular cone is 0.9 °.
In step (3), the interior diameter scope of the tubular blank after punching press is at 770mm, overall diameter scope 880mm.
In step (4), the osculum interior diameter after punching press is 480mm, and overall diameter is 590mm.
Surface heat processing comprises polishing and the blasting treatment to product surface.
Beneficial effect: by technical process of the present invention, the thickness of convex globoidal is not less than 47mm inside valve casing, can guarantee that convex globoidal inside valve casing reaches good in processing characteristics, and valve body has higher intensity, long service life.
accompanying drawing explanation:
Fig. 1 is the valve casing structural representation of valve body of the present invention;
Fig. 2 is the structural representation of the disk blank after skiving;
Fig. 3 is the heat treated temperature-time curve figure of normalizing.
The specific embodiment
Embodiment 1: a kind of spherical shell manufacture craft of ball valve is that referring to Fig. 1-Fig. 3, the implementation procedure of this technique comprises the following steps for valve body hemisphere 770 × 55 trial-production schemes:
First, select to meet the steel plate blank of examination criteria, the steel plate blank that is 55mm by thickness on blank machine cuts into discoid.The circumferential edges of disk upper side is carried out to skiving and be processed to form circular cone, the cone angle scope of this circular cone is 0.9 ° of left and right.Secondly, after being heated to 890～970 ℃, skiving disk after treatment on forcing press, carries out punching press, the diameter of mold drift sphere when punching press is 770mm, bed die is the annular cushion block of interior diameter 880mm, the tubbiness blank of suppressing rear formation is carried out to size detection, guarantee that the interior diameter scope of this tubular blank is at 770mm, overall diameter scope 880mm mm, thickness range 55mm.Again, local heat is carried out in the bottom of tubular blank, make its bottom temp remain on 950～1050 ℃, on forcing press, osculum punching is carried out in the bottom of the tubular blank after heating, the spherical diameter of the mold drift that punching adopts is 470mm, and bed die is the annular cushion block of interior diameter 580mm, valve casing blank dimension after moulding is detected, the osculum interior diameter of guaranteeing punching is 470mm, and overall diameter is 580mm, and osculum is 74mm to the straight flange width of downward-extension.Then, product normalizing heat treatment is recovered to product mechanical property, when normalizing, product charging temperature is less than or equal to 500 ℃ and is warming up to gradually 900～930 ℃, and programming rate is less than or equal to 150 ℃/h, be then incubated 125 minutes after gradually cooling come out of the stove.Finally, aligning burning hot product after treatment carries out surface treatment and completely examines surface heat processing comprising polishing and the blasting treatment to product surface.
This ball valve design pressure 64Kg, serviceability temperature-29～120 ℃, this type valve body is made into all-welded ball valve through the accessory processing of certain company at present, tries out on natural gas feed-line by dealer's gas-fired equipment Co., Ltd, duty is good, well received.
Claims (5)
1. a spherical shell manufacture craft for ball valve, is characterized in that, comprises the following steps:
(1) selection meets the steel plate blank of examination criteria, and the steel plate blank that is 52～58mm by thickness on blank machine cuts into discoid;
(2) circumferential edges of disk upper side is carried out to skiving and be processed to form circular cone, the cone angle scope of this circular cone is 0.8～1.0 °;
(3) after being heated to 800～1000 ℃, skiving disk after treatment on forcing press, carries out punching press, the diameter of mold drift sphere when punching press is 766～774mm, bed die is the annular cushion block of interior diameter 876～884mm, the tubbiness blank of suppressing rear formation is carried out to size detection, guarantee that the interior diameter scope of this tubular blank is at 768～774mm, overall diameter scope 878～886mm mm, thickness range 53～57mm;
(4) local heat is carried out in the bottom of tubular blank in step (3), make its bottom temp remain on 850～1100 ℃, on forcing press, osculum punching is carried out in the bottom of the tubular blank after heating, the spherical diameter of the mold drift that punching adopts is 476～482mm, bed die is the annular cushion block of interior diameter 587～592mm, valve casing blank dimension after moulding is detected, the osculum interior diameter of guaranteeing punching is 478～482mm, overall diameter is 588～592mm, and osculum is 73～76mm to the straight flange width of downward-extension;
(5) product normalizing heat treatment is recovered to product mechanical property, when normalizing, product charging temperature is less than or equal to 500 ℃ and is warming up to gradually 900～930 ℃, and programming rate is less than or equal to 150 ℃/h, be then incubated 120～135 minutes after gradually cooling come out of the stove;
(6) align burning hot product after treatment and carry out surface treatment complete examination.
2. spherical shell manufacture craft according to claim 1, is characterized in that: in step (2), the cone angle scope of circular cone is 0.9 °.
3. spherical shell manufacture craft according to claim 1, is characterized in that: in step (3), the interior diameter scope of the tubular blank after punching press is at 770mm, overall diameter scope 880mm.
4. spherical shell manufacture craft according to claim 1, is characterized in that: in step (4), the osculum interior diameter after punching press is 480mm, and overall diameter is 590mm.
5. spherical shell manufacture craft according to claim 1, is characterized in that: surface heat processing comprises polishing and the blasting treatment to product surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403734.5A CN103769800B (en) | 2012-10-22 | 2012-10-22 | The spherical shell manufacture craft of ball valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403734.5A CN103769800B (en) | 2012-10-22 | 2012-10-22 | The spherical shell manufacture craft of ball valve |
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| Publication Number | Publication Date |
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| CN103769800A true CN103769800A (en) | 2014-05-07 |
| CN103769800B CN103769800B (en) | 2016-04-13 |
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| CN201210403734.5A Active CN103769800B (en) | 2012-10-22 | 2012-10-22 | The spherical shell manufacture craft of ball valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801936A (en) * | 2015-04-30 | 2015-07-29 | 重庆市天马机械配件厂 | Machining method for automobile spherical shell forging |
| CN109048235A (en) * | 2018-10-12 | 2018-12-21 | 哈尔滨锅炉厂有限责任公司 | The manufacturing method of large capacity compacting drum SA299 dome head |
| CN112846670A (en) * | 2021-01-25 | 2021-05-28 | 湖南理工学院 | Processing technology of valve core shell of water faucet |
| CN113878318A (en) * | 2021-11-22 | 2022-01-04 | 山东徐氏重工有限公司 | Production process of auxiliary valve body of spherical fixed ball valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979873A (en) * | 1998-11-16 | 1999-11-09 | Wu; Lei-Jui | Method of making ball valves |
| CN1383944A (en) * | 2001-04-29 | 2002-12-11 | 陈鸿茂 | Ball valve forming process |
| CN101234465A (en) * | 2008-01-22 | 2008-08-06 | 西安交通大学 | Ball valve core expansion method |
| CN101358658A (en) * | 2008-09-12 | 2009-02-04 | 黄勇 | Globe valve core and manufacture method thereof |
| CN102248362A (en) * | 2011-04-30 | 2011-11-23 | 泰安广大化工机械有限公司 | Method for manufacturing end socket of voltage stabilizer for nuclear power |
-
2012
- 2012-10-22 CN CN201210403734.5A patent/CN103769800B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979873A (en) * | 1998-11-16 | 1999-11-09 | Wu; Lei-Jui | Method of making ball valves |
| CN1383944A (en) * | 2001-04-29 | 2002-12-11 | 陈鸿茂 | Ball valve forming process |
| CN101234465A (en) * | 2008-01-22 | 2008-08-06 | 西安交通大学 | Ball valve core expansion method |
| CN101358658A (en) * | 2008-09-12 | 2009-02-04 | 黄勇 | Globe valve core and manufacture method thereof |
| CN102248362A (en) * | 2011-04-30 | 2011-11-23 | 泰安广大化工机械有限公司 | Method for manufacturing end socket of voltage stabilizer for nuclear power |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801936A (en) * | 2015-04-30 | 2015-07-29 | 重庆市天马机械配件厂 | Machining method for automobile spherical shell forging |
| CN109048235A (en) * | 2018-10-12 | 2018-12-21 | 哈尔滨锅炉厂有限责任公司 | The manufacturing method of large capacity compacting drum SA299 dome head |
| CN112846670A (en) * | 2021-01-25 | 2021-05-28 | 湖南理工学院 | Processing technology of valve core shell of water faucet |
| CN113878318A (en) * | 2021-11-22 | 2022-01-04 | 山东徐氏重工有限公司 | Production process of auxiliary valve body of spherical fixed ball valve |
| CN113878318B (en) * | 2021-11-22 | 2023-08-22 | 山东徐氏重工有限公司 | Production process of auxiliary valve body of spherical fixed ball valve |
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| Publication number | Publication date |
|---|---|
| CN103769800B (en) | 2016-04-13 |
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| CB03 | Change of inventor or designer information |
Inventor after: Wang Shoudong Inventor after: Wu Pengxiang Inventor after: Yue Xiaolu Inventor after: Sun Shiqing Inventor after: Lei Yuchuan Inventor after: Zhang Ying Inventor before: Zhang Shijun Inventor before: Duan Haihua Inventor before: Yue Xiaolu |
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Address after: Xinxiang City, Henan province 453700 Xinxiang County town of Qingnian Road wing Applicant after: HENAN SHENZHOU HEAVY HEADS CO., LTD. Address before: Xinxiang City, Henan province 453700 Xinxiang County town of Qingnian Road wing Applicant before: HENAN SHENZHOU HEAVY HEADS CO., LTD. |
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