CN102837162A - Method for producing thick-wall hollow valve cores of large-scale ball valves - Google Patents

Method for producing thick-wall hollow valve cores of large-scale ball valves Download PDF

Info

Publication number
CN102837162A
CN102837162A CN2012103625759A CN201210362575A CN102837162A CN 102837162 A CN102837162 A CN 102837162A CN 2012103625759 A CN2012103625759 A CN 2012103625759A CN 201210362575 A CN201210362575 A CN 201210362575A CN 102837162 A CN102837162 A CN 102837162A
Authority
CN
China
Prior art keywords
pipe
steel pipe
wall hollow
heavy wall
mouth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2012103625759A
Other languages
Chinese (zh)
Other versions
CN102837162B (en
Inventor
张轩
Original Assignee
张轩
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 张轩 filed Critical 张轩
Priority to CN201210362575.9A priority Critical patent/CN102837162B/en
Publication of CN102837162A publication Critical patent/CN102837162A/en
Application granted granted Critical
Publication of CN102837162B publication Critical patent/CN102837162B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a method for producing thick-wall hollow valve cores of large-scale ball valves. The method comprises the following specific steps of: a. selecting a steel plate as a material; b. rolling the thick steel plate selected in the step a into a circular pipe shape so as to finally obtain a thick-wall seamed steel pipe; c. respectively chamfering the outer walls of two orifices of the steel pipe obtained in the step b into circular conical surfaces; d. pre-pressing the outer walls of the two orifices of the steel pipe obtain in the step c into arc-shaped surfaces; and e. arranging an upper die and a lower die on a press, placing the steel pipe obtained in the step d in the lower die, and combining and pressurizing the upper and lower dies to obtain a finished thick-wall hollow valve core. According to the method, the complicated computing and lofting are not required and the splicing and the welding are also not required, so that the process is markedly simplified, the process difficulty is reduced, the product precision is reliably ensured, the processing cost is reduced, and excellent technological and economical values are provided, so that the method is suitable to large-scale popularization and application.

Description

The heavy wall hollow spool production method of large-scale ball valve
?
Technical field
The invention belongs to large-scale ball valve element and make the field, specifically, relate to a kind of method of producing large-scale ball valve heavy wall hollow spool.
Background technology
Large-scale ball valve generally is meant the valve of latus rectum DN >=300mm, and it is widely used in fields such as oil transportation route, chemical industry, power equipment.The heavy wall hollow spool is the vitals of large-scale ball valve, and it is used for the flow regime of control valve in-core fluid.At present; The heavy wall hollow spool of producing large-scale ball valve generally adopts following steps: at first on steel plate, calculate, setting-out; Secondly on press according to the parts of the data processing multi-disc melon lobe formula of setting-out, the parts with multi-disc melon lobe formula are stitched together then, form the shape of heavy wall hollow spool; At last that the parts welding of adjacent two melon lobe formulas is fixing, finally obtain heavy wall hollow spool finished product.
In process of production, we find that the production technology of existing heavy wall hollow spool is comparatively complicated, need carry out miscellaneous calculating and setting-out; And operation is many; The precision of product is difficult to reliably guaranteed, production cost is also than higher in addition, needs badly to solve the problems of the technologies described above for this reason.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of heavy wall hollow spool production method of large-scale ball valve, with simplification technology, and the precision of assurance product.
Technical scheme of the present invention is introduced a kind of heavy wall hollow spool production method of large-scale ball valve, and its concrete step is following:
A, selection, material are steel plate, and the thickness of steel plate is 50~200mm;
B, pipe crimping, through large-scale veneer reeling machine with step a select steel plate be rolled into the pipe shape, weld the slit of joint again, finally obtain the heavy wall seamed steel pipe, and the latus rectum DN >=2.6m of steel pipe;
C, the rounding conical surface, two mouth of pipe outer walls with step b gained steel pipe fall into taper seat respectively;
D, precompressed, at first a mouth of pipe with step c gained steel pipe is heated to 850 ℃~900 ℃, on forcing press, the outer wall of this mouth of pipe is pressed into arcwall face again; Then with steel pipe switching-over, another mouth of pipe of step c gained steel pipe is heated to 850 ℃~900 ℃, on forcing press, the outer wall of this mouth of pipe also is pressed into arcwall face again;
E, moulding; At first on the table top of forcing press, counterdie is set, and on pressure head fixing patrix, and upper die and lower die are the hemisphere shell-like structure; The steel pipe that then steps d is made is put into counterdie; Obtain the heavy wall hollow spool of finished product after the pressurization of upper die and lower die matched moulds, and the latus rectum DN >=500mm of gained heavy wall hollow spool, and the wall thickness of heavy wall hollow spool is 50~200mm.
Because the seamless steel pipe latus rectum DN that now can buy on the market is smaller, and general≤800mm, the satisfactory steel pipe of latus rectum so at first need be obtained.In above-mentioned processing method, step b with step a select steel plate be rolled into seamed steel pipe, and the steel pipe latus rectum DN >=2.6m that makes.What this need specify be, need do not adopt step a and b when making small-sized thin-walled hollow spool, only need to process purchasing a ready-made seamless steel pipe on the market.
As for step c then is for the ease of the carrying out smoothly of steps d, and two mouth of pipe outer wall chamfering taperings of steel pipe can be between 30 ° to 45 ° and 60 °, and this taper seat plays guiding, transmits pressure.
Steps d earlier with two mouths of pipe of steel pipe precompressed camber face roughly, obtains finished product heavy wall hollow spool through step e at last.
are compared with existing manufacturing technique, and this production method need not be carried out complicated calculation, setting-out, also need not splice and weld; So just simplified technology significantly; Reduced technology difficulty, and can guarantee the precision of product reliably, cut down finished cost; Have good technology and economic worth, be suitable for the large-scale promotion utilization.
In the present invention, the pressure of used forcing press is preferably 2000T~8000T among said steps d and the e, and the pressure ratio of used forcing press is more moderate, can work the work piece into type, can avoid again that pressure is excessive to cause unnecessary waste.
In above production method, step c accomplishes on lathe or emery wheel grinding machine or beveler, and two mouth of pipe outer wall chamfering taperings of steel pipe are 30 ° to 45 °.
Certainly, satisfying under the prerequisite of processing request, we also can come completing steps c according to existing equipment at hand.In addition, two mouth of pipe outer wall chamfering tapering size to fits of steel pipe, the effect that this taper seat can play guiding well, transmit pressure.
In the present invention, said material is preferably corrosion resistant plate.
Beneficial effect: this production method need not be carried out complicated calculation, setting-out, also need not splice and weld, and has so just simplified technology significantly; Reduced technology difficulty, and can guarantee the precision of product reliably, cut down finished cost; Have good technology and economic worth, be suitable for the large-scale promotion utilization.
Description of drawings
Fig. 1 is by the change in shape sketch map of raw material to finished product when adopting this production method to produce the heavy wall hollow spool.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
With reference to Fig. 1, a kind of heavy wall hollow spool production method of large-scale ball valve, its steps in sequence is following:
A, selection, material are steel plate, and this steel plate is preferably corrosion resistant plate, and the thickness of steel plate is 50~200mm, and the length of steel plate is according to the latus rectum DN decision of the required steel pipe of step b.
B, pipe crimping, through large-scale veneer reeling machine with step a select steel plate be rolled into the pipe shape, weld the slit of joint again, finally obtain the heavy wall seamed steel pipe, and the latus rectum DN >=2.6m of steel pipe.
C, the rounding conical surface, two mouth of pipe outer walls with step b gained steel pipe fall into taper seat respectively, and the tapering of taper seat is preferably 30 ° to 45 °.In addition, step c accomplishes on lathe or emery wheel grinding machine or beveler.
D, precompressed at first are heated to 850 ℃~900 ℃ with the mouth of pipe of step c gained steel pipe in heating furnace, on forcing press, the outer wall of this mouth of pipe is pressed into arcwall face again.With steel pipe switching-over, another mouth of pipe with step c gained steel pipe in heating furnace is heated to 850 ℃~900 ℃ then, on forcing press, the outer wall of this mouth of pipe also is pressed into arcwall face again.In addition, the pressure >=2000T of institute's employing forcing press in the steps d.
E, moulding at first are provided with counterdie on the table top of forcing press, and on pressure head fixing patrix, and upper die and lower die are the hemisphere shell-like structure.Then, a mouth of pipe of steps d gained steel pipe is put into counterdie, obtain the heavy wall hollow spool of finished product after the pressurization of upper die and lower die matched moulds, this heavy wall hollow spool is the spherical shape structure, and the center has via hole.Latus rectum DN >=the 500mm of above-mentioned gained heavy wall hollow spool center via hole, and the wall thickness of heavy wall hollow spool is 50~200mm.In addition, the pressure >=2000T of used forcing press among the said step e.
The above is merely preferred embodiment of the present invention, is not restriction with the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. the heavy wall hollow spool production method of a large-scale ball valve, its step is following:
A, selection, material are steel plate, and the thickness of steel plate is 50~200mm;
B, pipe crimping, through large-scale veneer reeling machine with step a select steel plate be rolled into the pipe shape, weld the slit of joint again, finally obtain the heavy wall seamed steel pipe, and the latus rectum DN >=2.6m of steel pipe;
C, the rounding conical surface, two mouth of pipe outer walls with step b gained steel pipe fall into taper seat respectively;
D, precompressed, at first a mouth of pipe with step c gained steel pipe is heated to 850 ℃~900 ℃, on forcing press, the outer wall of this mouth of pipe is pressed into arcwall face again; Then with steel pipe switching-over, another mouth of pipe of step c gained steel pipe is heated to 850 ℃~900 ℃, on forcing press, the outer wall of this mouth of pipe also is pressed into arcwall face again;
E, moulding; At first on the table top of forcing press, counterdie is set, and on pressure head fixing patrix, and upper die and lower die are the hemisphere shell-like structure; The steel pipe that then steps d is made is put into counterdie; Obtain the heavy wall hollow spool of finished product after the pressurization of upper die and lower die matched moulds, and the latus rectum DN >=500mm of gained heavy wall hollow spool, and the wall thickness of heavy wall hollow spool is 50~200mm.
2. according to the heavy wall hollow spool production method of the said large-scale ball valve of claim 1, it is characterized in that: the pressure >=2000T of used forcing press among said steps d and the e.
3. according to the heavy wall hollow spool production method of claim 1 or 2 said large-scale ball valves, it is characterized in that: step c accomplishes on lathe or emery wheel grinding machine or beveler, and two mouth of pipe outer wall chamfering taperings of steel pipe are 30 ° to 45 °.
4. according to the heavy wall hollow spool production method of the said large-scale ball valve of claim 1, it is characterized in that: said material is a corrosion resistant plate.
CN201210362575.9A 2012-09-26 2012-09-26 Method for producing thick-wall hollow valve cores of large-scale ball valves Active CN102837162B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210362575.9A CN102837162B (en) 2012-09-26 2012-09-26 Method for producing thick-wall hollow valve cores of large-scale ball valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210362575.9A CN102837162B (en) 2012-09-26 2012-09-26 Method for producing thick-wall hollow valve cores of large-scale ball valves

Publications (2)

Publication Number Publication Date
CN102837162A true CN102837162A (en) 2012-12-26
CN102837162B CN102837162B (en) 2014-12-17

Family

ID=47365028

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210362575.9A Active CN102837162B (en) 2012-09-26 2012-09-26 Method for producing thick-wall hollow valve cores of large-scale ball valves

Country Status (1)

Country Link
CN (1) CN102837162B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103846630A (en) * 2014-03-26 2014-06-11 中国工程物理研究院激光聚变研究中心 Method for manufacturing thin-wall metal semi-spherical shell with seam allowance
CN103934630A (en) * 2013-01-18 2014-07-23 佛山市榕达厨具五金有限公司 Method for manufacturing ventilation valve body
CN104227240A (en) * 2013-06-11 2014-12-24 马勒国际有限公司 Method for producing a built hollow valve of an internal combustion engine
CN105458627A (en) * 2015-12-12 2016-04-06 贵州凯星液力传动机械有限公司 Machining method for thin-wall valve element with high-quality interchangeability
CN107717345A (en) * 2017-09-29 2018-02-23 广州小出钢管有限公司 A kind of technique for generating steel pipe of the both ends of the surface with below 0.5MM chamferings
CN111015110A (en) * 2019-12-23 2020-04-17 西部金属材料股份有限公司 Preparation method of metal pipe fitting difficult to deform

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1383944A (en) * 2001-04-29 2002-12-11 陈鸿茂 Ball valve forming process
JP2006292150A (en) * 2005-04-14 2006-10-26 Isamu Tekkosho:Kk Production method for ball of ball valve
CN101224536A (en) * 2007-12-28 2008-07-23 浙江东南网架股份有限公司 Processing technique of crown scraped hollow sphere
CN101234465A (en) * 2008-01-22 2008-08-06 西安交通大学 Ball valve core expansion method
CN102032359A (en) * 2011-01-25 2011-04-27 张轩 Valve core of ball valve and processing method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1383944A (en) * 2001-04-29 2002-12-11 陈鸿茂 Ball valve forming process
JP2006292150A (en) * 2005-04-14 2006-10-26 Isamu Tekkosho:Kk Production method for ball of ball valve
CN101224536A (en) * 2007-12-28 2008-07-23 浙江东南网架股份有限公司 Processing technique of crown scraped hollow sphere
CN101234465A (en) * 2008-01-22 2008-08-06 西安交通大学 Ball valve core expansion method
CN102032359A (en) * 2011-01-25 2011-04-27 张轩 Valve core of ball valve and processing method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103934630A (en) * 2013-01-18 2014-07-23 佛山市榕达厨具五金有限公司 Method for manufacturing ventilation valve body
CN103934630B (en) * 2013-01-18 2016-09-21 佛山市榕达厨具五金有限公司 A kind of manufacture method of the valve body that ventilates
CN104227240A (en) * 2013-06-11 2014-12-24 马勒国际有限公司 Method for producing a built hollow valve of an internal combustion engine
CN103846630A (en) * 2014-03-26 2014-06-11 中国工程物理研究院激光聚变研究中心 Method for manufacturing thin-wall metal semi-spherical shell with seam allowance
CN103846630B (en) * 2014-03-26 2016-04-06 中国工程物理研究院激光聚变研究中心 A kind of thin walled metallic materials hemispherical Shell manufacture method with seam
CN105458627A (en) * 2015-12-12 2016-04-06 贵州凯星液力传动机械有限公司 Machining method for thin-wall valve element with high-quality interchangeability
CN107717345A (en) * 2017-09-29 2018-02-23 广州小出钢管有限公司 A kind of technique for generating steel pipe of the both ends of the surface with below 0.5MM chamferings
CN111015110A (en) * 2019-12-23 2020-04-17 西部金属材料股份有限公司 Preparation method of metal pipe fitting difficult to deform
CN111015110B (en) * 2019-12-23 2021-01-08 西部金属材料股份有限公司 Preparation method of metal pipe fitting difficult to deform

Also Published As

Publication number Publication date
CN102837162B (en) 2014-12-17

Similar Documents

Publication Publication Date Title
CN102837162B (en) Method for producing thick-wall hollow valve cores of large-scale ball valves
CN102266876B (en) Forming process and mould of seamless fork-shaped pipe
CN102747242A (en) Method for preparing large-size hard alloy
CN106975675A (en) The wind-powered electricity generation steel-pipe pile shell rolling technique of system and the application system is monitored and controlled in a kind of light sensation of veneer reeling machine
CN203678954U (en) Pipe bending device capable of being adjusted in bending radius
CN102039345B (en) Extrusion forming die for thick-wall butt welding tee joint and process for manufacturing tee joint
CN105312858B (en) A kind of mold used in submersible sewage pump pump case forming method and this method
CN102717232A (en) Manufacturing method for half liner in head sheave of large-sized elevator
CN201324762Y (en) Punching-extrusion rounding device for processing automobile guide sleeves
CN101954418A (en) Method for manufacturing thin-wall cylindrical member necking die
CN202162227U (en) Seamless forked pipe forming mould
CN106734482A (en) A kind of high intensity high accuracy small-angle method for manufacturing parts
CN202239226U (en) High precision combined mould for neck-spinning of pipes
CN101797593A (en) Vertical axial extrusion process and device of high-temperature and high-pressure seamless tee joint
CN105665537A (en) Stretching die applied to production of bullet case of perforating bullet
CN207064887U (en) A kind of two halves compacting butt-welding pipe fitting of large-scale pipeline with straight length concentric reducer reducing
CN205956188U (en) Intermediate position area circular hoop form boss formula thin -wall hollow axle
CN105414417B (en) Large-scale diskware local continuous loading forming method
CN104384849A (en) Integrated extruding, forming and manufacturing method for truss-type pile leg chord of self-elevating platform
CN203578658U (en) Formation tool for driven bevel gears
CN101823196A (en) Production process of tubular pile end plate and industrial flange
CN106734333A (en) The cold roll forming apparatus and method of a kind of odd-shaped cross section pipe
CN202461286U (en) Die for steel pipe finishing machine
CN102962293B (en) A kind of pipe die manufacture method using steel ingot big diameter-reducing formation blank
CN207770495U (en) A kind of external splines machine-shaping cutter

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant