CN207655699U - Nuclear island evaporator head blanking molding machine - Google Patents
Nuclear island evaporator head blanking molding machine Download PDFInfo
- Publication number
- CN207655699U CN207655699U CN201721296162.XU CN201721296162U CN207655699U CN 207655699 U CN207655699 U CN 207655699U CN 201721296162 U CN201721296162 U CN 201721296162U CN 207655699 U CN207655699 U CN 207655699U
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- Prior art keywords
- punch
- involute
- forming
- radius
- anvil
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Abstract
The utility model discloses a kind of nuclear island evaporator head blanking molding machines, including forming punching head and corresponding forming ring anvil, the punch body of forming punching head is made of punch profiled section and punch apical cap, the busbar of punch profiled section is involute, the molding involute basic circle center of circle of the involute busbar is located on the punch body bottom surface of punch body, and punch body bottom surface radius is equal to molding involute base radius；Punch apical cap is preced with for ball, and crown radius where ball hat is equal to the radius of molding involute basic circle；The forming ring anvil is in circular ring structure, and the inner hole surface of forming ring anvil is ring anvil forming surface, which is involute surface, and the involute busbar basic circle center of circle of the ring anvil forming surface is located on the ring anvil bottom surface of forming ring anvil.The utility model not only has higher punch forming efficiency, but also forging even tissue is closely knit, metal streamline is complete, forging fibr tissue and shape are more aligned, the uniformity of end socket microscopic structure and mechanical property.
Description
Technical field
The utility model is related to nuclear power facility large-sized structural parts, more particularly to can solid forging nuclear power nuclear island steam generation
The impact molding machine of device low head blank.
Background technology
Pressurized-water reactor nuclear power plant is mainly made of nuclear island and conventional island, and four big components of pressurized-water reactor nuclear power plant nuclear island are steam hairs
Raw device, voltage-stablizer, main pump and reactor core.Wherein nuclear island steam generator is the most key capital equipment of nuclear power station, steam generation
Device is connected with reactor pressure vessel, is to undertake the maximum component of pressure difference, plays the work of sealing and isolation one, secondary circuit coolant
With and primary Ioops side coolant flow through tube bank before or after collect chamber, it not only directly affects the power and efficiency in power station,
And when carrying out heat exchange, also play a part of obstructing radioactivity catalyst carrier, it is most important to nuclear plant safety.
Steam generator low head, in structure comprising main body sphere, the outlet of primary Ioops coolant and inlet connection and
Two manhole collars, for tube sheet diameter up to 7-8 meters, single finished product component weight belongs to large volume, big more than tens of tons
The complicated core level-one forging of section, complex-curved, porous reducing, forging difficulty are very big.Due to complicated planform, in addition
Material（SA508 Gr.3 Cl.2 steel）The limitation of itself quenching degree, it is necessary to plan as a whole each production ring such as to smelt, forge, be heat-treated
Section to obtain uniform microstructure and mechanical property, and then achievees the purpose that not only " control type " but also " control property ", to improve whole forging
Make reliability and the safety of low head.
Existing steam generator low head mostly carries out splicing manufacture by the method for welding, although as material science
Development, the performance of welding material is greatly improved, and welding technology also emerges one after another, but is spliced by welding
Structure cannot always form complete metal streamline, since nuclear steam generator is chronically at the severe operation ring of high temperature and pressure
In border, and bear alternate load and pipeline vortex be formed by pressure jump, easily cause the not uniform stress concentration of stress distribution,
Easy to produce fatigue, creep and damage.And the method for such welding manufacture, complex process, welding interval are long, complex stress area
Quality stability is poor, and it is low to directly contribute yield rate, and manufacturing cost is high.The applicant takes the lead in carrying out sealing under steam generator at home
The whole stamping forming trial-production production of head, it is real on great tonnage hydraulic machine by anvil under annular and the coronal forming punching head of ball
The solid forging shaping of existing end socket, although the entirety impact forming method completes the forging molding of end socket, to whole forging
It is found when part progress Dissection test analysis, solid forging difference component position mechanical property and crystalline phase structural homogenity are not easy to find pleasure in
It sees.The radius of curvature being primarily due on each punching press point of the coronal punch of ball immobilizes always, and in practical punching course with
The continuous undershoot of punch, the deflection on end socket forging stock cross sections is increasing, i.e. axial deflection and radial deformation
Amount is not changeless, and ball hat punch does not adapt to such variation, this allows for end socket and respectively forges on section
Pressing Deformation gradient is excessive, leads to the notable difference of forging different parts microscopic structure and mechanical property, makes its solid forging
End socket forging microscopic structure and mechanical property uniformity deteriorate, and influence reliability and the safety of end socket product.Furthermore ball is preced with
The punch forming drag direction of shape punch everywhere is all directed to the sphere center position of spherical crown, radial shaping resistance and axial shaping resistance
It is almost equal, since the radial shaping resistance direction equal in magnitude of punch-center line both sides is not on the contrary, it is to form hydraulic press work
Make the direct factor of resistance, and axial shaping resistance must then be overcome by hydraulic press, therefore the shaping resistance of ball hat punch
It is larger, the working resistance of hydraulic press is not only increased, and the press work efficiency of hydraulic press is lower.Therefore optimization design
Anvil is to obtain uniform formation and mechanical property end socket product, and have the important way of higher ram efficiency under forming punching head and punching press
Diameter.
Utility model content
For the above-mentioned deficiency present in the prior art, the technical problem to be solved by the utility model is to provide a seed nucleus
Island steam generator entirety punch forming device, can not only effectively improve the uniformity of end socket microscopic structure and mechanical property, and
And there is higher punch forming efficiency.
In order to solve the above-mentioned technical problem, the nuclear island evaporator head blanking molding machine of the utility model, including
Forming punching head and corresponding forming ring anvil, the punch body of the forming punching head are made of punch profiled section and punch apical cap,
Punch apical cap is located at the lower end of punch profiled section, and the busbar of punch profiled section is involute, and the molding of the involute busbar is gradually opened
The line basic circle center of circle is located on the punch body bottom surface of punch body, and punch body bottom surface radius is equal to molding involute base radius；Punching
Crown hat is that ball is preced with, and crown radius where ball hat is equal to the radius of molding involute basic circle；The forming ring anvil is in circle
The inner hole surface of ring structure, forming ring anvil is ring anvil forming surface, which is involute surface, and the ring anvil forming surface is gradually
The busbar basic circle center of circle of bursting at the seams is located on the ring anvil bottom surface of forming ring anvil.
Preferably, the forming punching head is made of punch body and punch holder, and punch body is fixedly installed in punch holder.
Preferably, the punch holder is in short circular tube structure, and punch bore is equipped in the center of punch holder.
Preferably, the molding involute base radius of the punch profiled section be R, the center of circle of the molding involute basic circle with
Ball centre of sphere distance where punch apical cap be a=（1/3-1/2）R.
Preferably, the involute busbar base radius r of the ring anvil forming surface is less than the molding involute of punch profiled section
Base radius R.
Preferably, the involute busbar base radius r of the ring anvil forming surface=（2/5-3/5）R.
In the present invention, the punch body of forming punching head is made of punch profiled section and punch apical cap, and punch is molded
Section busbar be involute, since any point is remoter from basic circle on involute, corresponding radius of curvature is bigger, i.e., forming punching head at
Type section more front end profiled section cylinder is more straight, and radius of curvature closer from basic circle is smaller, and molding cylinder bending degree is bigger, in this way
Slab deformation amount caused by punching press is changed with the variation of punching stroke, the slab corresponding to punch head to rear end
Deflection is to become larger, this makes the corresponding slab deformation amount of punch head slow down just at the right time, and more to punch profiled section cylinder
Butt, corresponding slab variable become larger so that deformation gradient of the end sealing plate blank on cross sections becomes smaller, and deforms quantitative change
It is relatively gentle, variable uniformly ensures that end socket forging different parts microscopic structure and mechanical property between each section of end socket
Uniformly, reliability and the safety of end socket product are effectively guaranteed.Again due to the ring anvil forming surface of forming ring anvil inner hole surface
Using involute curve, the mutually coordinated effect of involute cylinder of the involute surface and punch profiled section makes end socket blank
Pressing Deformation amount becomes more uniformly gentle, it is ensured that the uniformity of entire forging mechanical property.Due also to punch profiled section is adopted
With involute cylinder, and the involute normal of any point is all the tangent line of its basic circle on involute, and punch forming power is along method
Line direction, this just changes the punch forming drag direction of punch, and the radial component of punch forming resistance is made to become larger, and punching press
The axial component of shaping resistance becomes smaller, and axial punch shaping resistance component becomes smaller, and reduces the work load of hydraulic press, can have
Effect improves the working efficiency of hydraulic press；Axial component smaller simultaneously generates larger radial component, realizes " reinforcement " effect,
Punch forming efficiency is allowed in this way to be significantly improved.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is that punching is molded in a kind of specific implementation mode of the utility model nuclear island steam generator entirety punch forming device
The operating position schematic diagram of head and forming ring anvil；
Fig. 2 is the main cross section structure diagram of forming punching head in Fig. 1 illustrated embodiments；
Fig. 3 is the overlooking structure diagram of Fig. 2；
Fig. 4 is the main cross section structure diagram of forming ring anvil in Fig. 1 illustrated embodiments；
Fig. 5 is the overlooking structure diagram of Fig. 4.
In figure, 1-forming punching head, 11-punch holders, 12-punch bore, 13-molding involute basic circles, 14-punches
Body, 15-punch profiled sections, 16-punch apical caps, 17-generating line of involute, 18-punch body bottom surfaces；2-forming ring anvils,
21-ring anvil forming surfaces, 22-ring anvil bodies, 23-forming surface basic circles, 24-ring anvil bottom surfaces.
Specific implementation mode
Nuclear island steam generator head blanking molding machine as shown in Figure 1, the punch forming device include mutual
The forming punching head 1 and forming ring anvil 2 being correspondingly arranged, forming punching head 1 are located at the top of forming ring anvil 2, and the center of forming punching head 1
The centerline of line and forming ring anvil 2 is on same straight line.
Forming punching head 1 as shown in Figure 2 and Figure 3, forming punching head 1 is by positioned at the punch body 14 of lower end and rushing positioned at upper end
Headstock 11 is constituted, and punch body 14 is fixedly connected in punch holder 11, and punch body 14 is mutually connected with punch holder 11 with step surface, this
Sample has higher bonding strength and positioning performance.In order to reduce materials and dead weight, punch holder 11 is in short circular tube structure, i.e., in punch
The center of seat 11 is equipped with punch bore 2.
Punch body 14 is made of punch profiled section 15 and punch apical cap 16, and punch apical cap 16 is located under punch profiled section 15
End.The surface shape of punch profiled section 15 is involute surface of revolution, and busbar is involute, and the basic circle of the involute busbar is
It is molded involute basic circle 13, the center of circle of the radius R of molding involute basic circle 13, molding involute basic circle 13 are located at punch body 14
On punch body bottom surface 18, punch body bottom surface 18 is the rounded face that radius is R, 18 radius of punch body bottom surface and molding involute basic circle
13 radius is equal.Line 17 occurs for the involute busbar in Fig. 2 further including punch profiled section 15.Punch apical cap 16 is one and punch
The ball hat that profiled section 15 connects, crown radius where the spherical crown are also equal to involute busbar base radius R.The molding involute
Distance of center circle punch apical cap 16 place the ball hat centre of sphere distance a=1/3R, preferably a of basic circle 13=（1/3-1/2）It is selected in Zone R domain
Select determination.
Forming ring anvil 2 as shown in Figure 4, Figure 5 is in circular ring structure, and the inner hole surface of forming ring anvil 2 is ring anvil forming surface 21, should
Ring anvil forming surface 21 is also involute surface, and the involute busbar basic circle heart of ring anvil forming surface 21 is located at the ring anvil of forming ring anvil 2
On bottom surface 24.21 involute busbar base radius r of ring anvil forming surface is less than the molding involute basic circle 13 of punch profiled section 15
Radius R.In the present embodiment, the involute base radius of ring anvil forming surface 21 is r, and the radius of molding involute basic circle 13 is R, r=
3/5R.Preferably r=（2/5-3/5）It selects to determine in R.
The whole impact forming method of the utility model, its step are as follows：Eight prism-shaped steel ingots are selected first, and to steel ingot
Segmented heating is carried out, first steel ingot is put into heating furnace and is heated, to improve plastic deformation, makes it easier to flowing forming simultaneously
It is organized after obtaining good forging, selects appropriate heating temperature section, metal blank can be made to be molded in the state that plasticity is preferable；
Since steel ingot belongs to large-size massive part, to reduce the temperature stress generated by section temperature difference, steel ingot should be made to be evenly heated heating.
Steel ingot is sent be heated to 580 DEG C into heating furnace first, protected at this temperature by the utility model using heat stepwise heating specification
Temperature 3 hours, the second bringing-up section is heated to 830 DEG C with the heating speed of 55 DEG C/h, keeps the temperature 4 hours at this temperature, third heating
Section is heated up to 1130 DEG C with the heating speed of 78 DEG C/h, and when being more than 800 DEG C due to steel ingot temperature, steel ingot has had certain modeling
Property, therefore this bringing-up section uses comparatively faster heating speed, the 4th section is also heated up to 1240 with the heating speed of 78 DEG C/h
DEG C, steel ingot keeps the temperature 1 hour and forms Forge Heating blank at this temperature.
Heat blanking：It will warm up 1240 DEG C of steel ingot and taken out from heating furnace and sent to large hydraulic press, be upper with marking knife
Anvil, which cuts heating steel ingot, to be chopped end to end, to ensure useful stage casing quality of materials, is tapped the steel ingot stage casing steel hammer left to go
The forging stock for forging is obtained except the oxide scale layer of steel ingot periphery.
Forging stock upsetting pull：Forging stock is depressed into jumping-up in an axial direction, which uses big upset ratio, so that forging stock internal void is abundant
Pressing, as cast condition dendrite are smashed, and the upset ratio of jumping-up is 3.0, and each jumping-up reduction ratio of forging stock jumping-up should be controlled 24%-
In 30% range.It is pulled out, is pulled out after upset forging after upset forging, it is 3.0 that the pulling of pulling, which is compared, the pressure pulled out every time
Lower rate should also control in 24% -30% range, and forging stock is finally drawn into nearly columned forging stock.It is pulled out by above-mentioned jumping-up
It can ensure that the porosity defects such as forging internal porosity, shrinkage cavity are closed, obtain preferably forging tissue.Forging stock upsetting pull temperature should control
Between 800 DEG C -1240 DEG C, i.e., forging stock temperature is down to 800 DEG C in forging process, need to reheat forging stock, makes forging stock temperature
It remains within the scope of 800 DEG C -1240 DEG C.
Plate blank molding：To be drawn into columned forging stock move to broadening anvil on disk-shaped head plate is formed by jumping-up
Base, the end sealing plate blank front answer upsetting to provide the evagination round table surface at auger angle；I.e. so that the thickness in end sealing plate blank centre is thick
Thickness in end sealing plate blank periphery.The forging temperature of jumping-up pulling should equally control between 800 DEG C -1240 DEG C.
Global formation：Forming ring anvil is installed on hydraulic press, then end sealing plate blank shifting is put to ring anvil forming surface
On forming ring anvil, forming punching head is moved on end sealing plate blank, and make the center line of forming punching head be located at disk-shaped end sealing plate blank and
The position of center line of forming ring anvil, start hydraulic press simultaneously act on forming punching head, with forming punching head with the speed of 20mm/s to
Lower punching press, until end sealing plate blank is made to strike out end socket forging.Forming punching head speed should control the range in 18mm/s -22mm/s
It is interior, to obtain uniform crystalline phase microstructure and mechanical property.
Forging is heat-treated：End socket forging is heat-treated again；Above-mentioned stamped end socket forging is heated up to first
905 DEG C -925 DEG C, 6-8 hours are kept the temperature in holding furnace, then after being air-cooled to 300 DEG C -400 DEG C, still moves to and keep the temperature 4-6 in holding furnace
Hour, then 640 DEG C -660 DEG C are heated to the heating speed of 45 DEG C/h-50 DEG C/h, and keep the temperature 12-14 hours in heating furnace
Afterwards, it 180 DEG C is cooled to the furnace comes out of the stove and be air-cooled to room temperature.
Finished product is processed：It is sampled professional etiquette of going forward side by side in the sampling reserved location of the above-mentioned thick finished product of the end socket through property heat treatment
The Physicochemical test for determining project, the thick finished product of end socket that Physicochemical test technical conditions are reached through physics and chemistry pass the test carry out mechanical finishing
Work, to reach the size and shape requirement of qualified end socket, to complete the forging, processing and heat treatment of end socket, to form end socket
Finished product.
Claims (6)
1. a kind of nuclear island evaporator head blanking molding machine, including forming punching head（1）With corresponding forming ring anvil
（2）, it is characterised in that：The forming punching head（1）Punch body（14）By punch profiled section（15）With punch apical cap（16）It constitutes,
Punch apical cap（16）Positioned at punch profiled section（15）Lower end, punch profiled section（15）Busbar be involute, the involute is female
The molding involute basic circle of line（13）The center of circle is located at punch body（14）Punch body bottom surface（18）On, and punch body bottom surface（18）Half
Diameter is equal to molding involute basic circle（13）Radius；Punch apical cap（16）For ball be preced with, the ball hat where crown radius be equal at
Type involute basic circle（13）Radius；The forming ring anvil（2）In circular ring structure, forming ring anvil（2）Inner hole surface be ring anvil at
Type face（21）, the ring anvil forming surface（21）For involute surface, the ring anvil forming surface（21）The involute busbar basic circle center of circle position
In forming ring anvil（2）Ring anvil bottom surface（24）On.
2. nuclear island evaporator head blanking molding machine according to claim 1, it is characterised in that：The molding punching
Head（1）By punch body（14）And punch holder（11）It constitutes, punch body（14）It is fixedly installed in punch holder（11）On.
3. nuclear island evaporator head blanking molding machine according to claim 2, it is characterised in that：The punch holder
（11）In short circular tube structure, in punch holder（11）Center be equipped with punch bore（12）.
4. nuclear island evaporator head blanking molding machine according to claim 1, it is characterised in that：The punch at
Type section（15）Molding involute basic circle（13）Radius is R, the molding involute basic circle（13）The center of circle and punch apical cap（16）
Place ball centre of sphere distance be a=（1/3-1/2）R.
5. nuclear island evaporator head blanking molding machine according to claim 1, it is characterised in that：The ring anvil at
Type face（21）Involute busbar base radius r be less than punch profiled section（15）Molding involute basic circle（13）Radius R.
6. nuclear island evaporator head blanking molding machine according to claim 5, it is characterised in that：The ring anvil at
Type face（21）Involute busbar base radius r=（2/5-3/5）R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721296162.XU CN207655699U (en) | 2017-10-10 | 2017-10-10 | Nuclear island evaporator head blanking molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721296162.XU CN207655699U (en) | 2017-10-10 | 2017-10-10 | Nuclear island evaporator head blanking molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207655699U true CN207655699U (en) | 2018-07-27 |
Family
ID=62936170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721296162.XU Withdrawn - After Issue CN207655699U (en) | 2017-10-10 | 2017-10-10 | Nuclear island evaporator head blanking molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207655699U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695163A (en) * | 2017-10-10 | 2018-02-16 | 上海新闵（东台）重型锻造有限公司 | Nuclear island evaporator head blanking shaped device and impact forming method |
| CN112676504A (en) * | 2020-12-09 | 2021-04-20 | 山东南山铝业股份有限公司 | Free forging processing method of aviation aluminum alloy arc forging plate |
-
2017
- 2017-10-10 CN CN201721296162.XU patent/CN207655699U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695163A (en) * | 2017-10-10 | 2018-02-16 | 上海新闵（东台）重型锻造有限公司 | Nuclear island evaporator head blanking shaped device and impact forming method |
| CN112676504A (en) * | 2020-12-09 | 2021-04-20 | 山东南山铝业股份有限公司 | Free forging processing method of aviation aluminum alloy arc forging plate |
| CN112676504B (en) * | 2020-12-09 | 2022-07-15 | 山东南山铝业股份有限公司 | Free forging processing method of aviation aluminum alloy arc forging plate |
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Granted publication date: 20180727 Effective date of abandoning: 20230616 |
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| AV01 | Patent right actively abandoned |
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| AV01 | Patent right actively abandoned |