CN107695163A - Nuclear island evaporator head blanking shaped device and impact forming method - Google Patents
Nuclear island evaporator head blanking shaped device and impact forming method Download PDFInfo
- Publication number
- CN107695163A CN107695163A CN201710933267.XA CN201710933267A CN107695163A CN 107695163 A CN107695163 A CN 107695163A CN 201710933267 A CN201710933267 A CN 201710933267A CN 107695163 A CN107695163 A CN 107695163A
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- Prior art keywords
- forming
- drift
- involute
- forging
- head
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of nuclear island evaporator head blanking shaped device, including forming punching head and corresponding forming ring anvil, the punch body of forming punching head is made up of drift profiled section and drift apical cap, the bus of drift profiled section is involute, and the shaping involute basic circle center of circle of the involute bus is located on the punch body bottom surface of punch body；Drift apical cap is preced with for ball；The inner hole surface of forming ring anvil is ring anvil forming surface, and the ring anvil forming surface is involute surface.Its stamping forming method comprises the following steps：（1）Heat blanking；（2）Forging stock upsetting pull；（3）Plate blank molding；（4）Global formation；（5）Forging is heat-treated；（6）Finished product is processed.The present invention not only has higher punch forming efficiency, and forging even tissue is closely knit, metal streamline is complete, forging fibr tissue and profile are more aligned, the uniformity of end socket microscopic structure and mechanical property.
Description
Technical field
The present invention relates under nuclear power facility large-sized structural parts, more particularly to energy solid forging nuclear power nuclear island steam generator
The impact shaped device of end socket blank.The invention further relates to use punch forming device forging steam generator entirety low head
Method.
Background technology
Pressurized-water reactor nuclear power plant is mainly made up of nuclear island and conventional island, and four big parts 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 part of pressure difference, plays sealing and isolation one, the work of secondary circuit cooling agent
With, and primary Ioops side cooling agent 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 spheroid, the outlet of primary Ioops cooling agent and inlet connection and
Two manhole collars, for its 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 one-level forging of section, complex-curved, porous reducing, forging difficulty are very big.Due to complexity 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 rings such as smelting, forging, heat treatment
Section, to obtain uniform microstructure and mechanical property, and then not only " control type " but also the purpose of " control ", to improve overall forging
Make the reliability and security 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, welding technology also emerges in an endless stream, but is spliced by welding
Structure can not always form complete metal streamline, because nuclear steam generator is chronically at the severe operation ring of HTHP
In border, and bear alternate load and pipeline and be vortexed formed pressure jump, easily cause the not uniform stress concentration of stress distribution,
Easily produce fatigue, creep and damage.And the so method of welding manufacture, complex process, welding interval is grown, 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 overall stamping forming trial-production production of head, it be by anvil under annular and the coronal forming punching head of ball on great tonnage hydraulic machine it is real
The solid forging shaping of existing end socket, although the overall impact forming method completes the forging molding of end socket, to overall forging
Found during part progress Dissection test analysis, solid forging difference part position mechanical property and crystalline phase structural homogenity are not easy to find pleasure in
See.The radius of curvature being primarily due on each punching press point of the coronal drift of ball immobilizes all the time, and in actual punching course with
The continuous undershoot of drift, 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 drift does not adapt to such change, and this allows for end socket and respectively forged on section
Pressing Deformation gradient is excessive, causes 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 the reliability and security of end socket product.Furthermore ball is preced with
The punch forming drag direction of shape drift everywhere is all referring to the sphere center position to spherical crown, radial direction shaping resistance and axial shaping resistance
Almost equal, because the radial direction shaping resistance of punch-center line both sides is equal in magnitude in opposite direction, it is not 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 drift
It is larger, the working resistance of hydraulic press is not only increased, and cause the press work efficiency step-down of hydraulic press.Therefore optimization design
Anvil is to obtain uniform formation and mechanical property end socket product under forming punching head and punching press, and the important way with higher ram efficiency
Footpath.
The content of the invention
For the above-mentioned deficiency present in prior art, the technical problems to be solved by the invention are to provide a kind of nuclear island and steamed
Vapour generator entirety punch forming device, the uniformity of end socket microscopic structure and mechanical property can not only be effectively improved, and had
There is higher punch forming efficiency.Another technical problems to be solved of the present invention are sent out using punch forming device forging steam
The method of raw device entirety low head.
In order to solve the above-mentioned technical problem, nuclear island evaporator head blanking shaped device of the invention, including shaping
Drift and corresponding forming ring anvil, the punch body of the forming punching head are made up of drift profiled section and drift apical cap, drift
Apical cap is located at the lower end of drift profiled section, and the bus of drift profiled section is involute, the shaping involute base of the involute bus
The round heart is located on the punch body bottom surface of punch body, and punch body bottom surface radius is equal to shaping involute base radius；Drift top
It is preced with and is preced with for ball, crown radius where ball hat is equal to the radius of shaping involute basic circle；The forming ring anvil is in annulus knot
Structure, the inner hole surface of forming ring anvil are ring anvil forming surface, and the ring anvil forming surface is involute surface, the involute of the ring anvil forming surface
The bus basic circle center of circle is located on the ring anvil bottom surface of forming ring anvil.
Preferably, the forming punching head is made up 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 drift bore is provided with the center of punch holder.
Preferably, the shaping involute base radius of the drift profiled section is R, the center of circle of the shaping involute basic circle with
Ball centre of sphere distance where drift apical cap for a=（1/3-1/2）R.
Preferably, the involute bus base radius r of the ring anvil forming surface is less than the shaping involute of drift profiled section
Base radius R.
Preferably, the involute bus base radius r of the ring anvil forming surface=（2/5-3/5）R.
The overall punch forming device of present invention application carries out overall stamping forming method, it is characterised in that：This strikes out
Type method comprises the following steps：
（1）Heat blanking：By steel ingot, step heating is to 1210 DEG C -1240 DEG C in heating furnace, from heating furnace after being incubated one hour
Middle taking-up, which is cut, to be chopped end to end, and goes removing oxide layer to form forging stock；
（2）Forging stock upsetting pull：Forging stock jumping-up is forged slightly than being 3.0-3.5；Forging stock is drawn into cylindric, pulling ratio again after forging is thick
For 3.0-3.5；Forging stock upsetting pull temperature control is in the range of 800 DEG C -1240 DEG C；
（3）Plate blank molding：Columned forging stock will be drawn into and be upset as end sealing plate blank, the end sealing plate blank is in discoideus structure, envelope
The center portion thickness of head plate base is thicker than peripheral thickness；
（4）Global formation：End sealing plate blank is moved on forming ring anvil, forming punching head along discoideus end sealing plate blank center line constant speed to
Punch forming next time is end socket forging, 18 ㎜ of drawing velocity/s -22 ㎜/s of forming punching head；
（5）Forging is heat-treated：Above-mentioned end socket forging is heated up to 905 DEG C-925 DEG C, is incubated 6-8 hours, then be air-cooled to 300
DEG C-400 DEG C, after insulation 4-6 hours, then with 45 DEG C/h-50 DEG C/h firing rate 640 DEG C-660 DEG C are heated to, protected
Temperature 12-14 hours, come out of the stove air cooling when being furnace-cooled to 180 DEG C and form the thick finished product of end socket；
（6）Finished product is processed：The above-mentioned thick finished product of the end socket through property heat treatment is sampled, and Physicochemical test is carried out to sample,
The thick finished product of end socket for being up to Physicochemical test technical conditions is machined out to qualified end socket finished product.
Preferably, for the forming punching head along the downward punching press of plectane end sealing plate blank center line, its punching stroke is end socket base half
Spherical inner concave surface depth.
Preferably, the forming punching head is 20 ㎜/s along the downward drawing velocity of plectane end sealing plate blank center line.
Preferably, the thick finished product of the end socket carries allowance.
In the present invention, the punch body of forming punching head is made up of drift profiled section and drift apical cap, and drift profiled section
Bus is involute, and because any point is more remote from basic circle on involute, corresponding radius of curvature is bigger, i.e. forming punching head profiled section
More profiled section cylinder in front end is more straight, and smaller from the nearer radius of curvature of basic circle, and shaping cylinder degree of crook is bigger, such punching press
Caused slab deformation amount is changed with the change of punching stroke, the slab deformation corresponding to punch head to rear end
Amount is to become larger, and this causes slab deformation amount corresponding to punch head to slow down just at the right time, and is got over to drift profiled section cylinder butt,
Corresponding slab variable becomes larger so that deformation gradient of the end sealing plate blank on cross sections diminishes, and deflection becomes phase
To gentle, variable uniformly ensures that the equal of end socket forging different parts microscopic structure and mechanical property between each section of end socket
It is even, it is effectively guaranteed the reliability and security of end socket product.Again because the ring anvil forming surface of forming ring anvil inner hole surface is also adopted
With involute curve, the mutually coordinated effect of involute cylinder of the involute surface and drift profiled section, make rushing for end socket blank
Compressive strain amount becomes more uniformly gentle, it is ensured that the uniformity of whole forging mechanical property.Due also to drift profiled section uses
Involute cylinder, and the involute normal of any point is all the tangent line of its basic circle on involute, punch forming power is along normal
Direction, this just changes the punch forming drag direction of drift, the radial component of punch forming resistance is become big, and strikes out
The axial component of form-drag diminishes, and axial punch shaping resistance component diminishes, and reduces the work load of hydraulic press, can be effective
Improve the operating efficiency of hydraulic press；Less axial component produces larger radial component simultaneously, realizes " reinforcement " effect, this
Sample allows for punch forming efficiency and significantly improved.
The present invention also uses the forming punching head drawing velocity of optimization, to ensure the gradual balanced change of forging microscopic structure,
To avoid the formation of the metal structure defect such as forging underbead crack during punch forming, ensure the complete of metal streamline, solve
Forging anisotropy caused by large forgings disposal molding deflection is excessive.The present invention also uses in different processing stages
Specific forging specification of heat treatment, it is ensured that large volume, big cross section forging can uniform heat penetration, make each region of forging center portion, surface
Between heating-up temperature it is consistent, avoid because section temperature difference produce temperature stress cause forging ingot cracking；The present invention beginning forging and
Final forging temperature and firing rate, forging is molded under preferable mecystasis, both effectively prevented to overheat, ensure forging again
Part recrystallization is abundant；Different process process of the present invention according to residing for forging, it is determined that different specifications of heat treatment, both effectively
Forging stress is eliminated, improves tissue, and effectively refined crystal grain, eliminated segregation, makes the tissue of steel and performance more uniform,
The comprehensive mechanical property of finished product forging is stabilized and increased.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and detailed description.
Fig. 1 is the operating position schematic diagram of forming punching head and forming ring anvil in a kind of embodiment of the present invention；
Fig. 2 is the main cross section structure diagram of forming punching head in Fig. 1 illustrated embodiments；
Fig. 3 is Fig. 2 overlooking the structure diagram；
Fig. 4 is the main cross section structure diagram of forming ring anvil in Fig. 1 illustrated embodiments；
Fig. 5 is Fig. 4 overlooking the structure diagram.
In figure, 1-forming punching head, 11-punch holder, 12-drift bore, 13-shaping involute basic circle, 14-drift
Body, 15-drift profiled section, 16-drift apical cap, 17-generating line of involute, 18-punch body bottom surface；2-forming ring anvil,
21-ring anvil forming surface, 22-ring anvil body, 23-forming surface basic circle, 24-ring anvil bottom surface.
Embodiment
Nuclear island steam generator head blanking shaped device 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 formed, 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 deadweight, punch holder 11 is in short circular tube structure, i.e., in drift
The center of seat 11 is provided with drift bore 2.
Punch body 14 is made up of drift profiled section 15 and drift apical cap 16, and drift apical cap 16 is located under drift profiled section 15
End.The surface configuration of drift profiled section 15 is involute surface of revolution, and its bus is involute, and the basic circle of the involute bus is
Involute basic circle 13, the radius R of shaping involute basic circle 13 are molded, the center of circle of shaping involute basic circle 13 is located at punch body 14
On punch body bottom surface 18, punch body bottom surface 18 is the rounded face that radius is R, the radius of punch body bottom surface 18 and shaping involute basic circle
13 radius is equal.Also line 17 occurs for the involute bus including drift profiled section 15 in Fig. 2.Drift apical cap 16 is one and drift
The ball hat that profiled section 15 connects, crown radius where the spherical crown are also equal to involute bus base radius R.The shaping involute
Distance of center circle drift apical cap 16 place the ball hat centre of sphere distance a=1/3R, preferably a of basic circle 13=（1/3-1/2）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 bus basic circle heart of ring anvil forming surface 21 is located at the ring anvil of forming ring anvil 2
On bottom surface 24.The involute bus base radius r of ring anvil forming surface 21 is less than the shaping involute basic circle 13 of drift 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 shaping involute basic circle 13 is R, r=
3/5R.Preferably r=（2/5-3/5）Select to determine in R.
The overall impact forming method of the present invention, its step are as follows：Eight prism-shaped steel ingots are selected first, and steel ingot is carried out
Segmented heating, first steel ingot is put into heating furnace and heated, to improve plastic deformation, made it easier to flowing forming and obtain
Organized after good forging, select appropriate heating-up temperature section, metal blank can be made to be molded in the state of plasticity is preferable；Due to
Steel ingot belongs to large-size massive part, to reduce the temperature stress as caused by section temperature difference, should make the uniform heat temperature raising of steel ingot.This hair
It is bright to use heat stepwise heating specification, steel ingot is delivered in heating furnace be heated to 580 DEG C first, be incubated 3 hours at this temperature,
Second bringing-up section is heated to 830 DEG C with 55 DEG C/h firing rate, at this temperature be incubated 4 hours, the 3rd bringing-up section with 78 DEG C/
H firing rate is heated up to 1130 DEG C, and when being more than 800 DEG C due to steel ingot temperature, steel ingot has certain plasticity, therefore this adds
Hot arc employs comparatively faster firing rate, and the 4th section is also heated up to 1240 DEG C with 78 DEG C/h firing rate, and steel ingot is herein
At a temperature of be incubated 1 hour and form Forge Heating blank.
Heat blanking：It will warm up 1240 DEG C of steel ingot and taken out from heating furnace and deliver to large hydraulic press, using marking knife to be upper
Anvil is cut to heating steel ingot to be chopped end to end, and to ensure useful stage casing quality of materials, the steel ingot stage casing steel hammer left is tapped 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 vertically, the jumping-up uses big upset ratio, so that forging stock internal void is abundant
Pressing, as cast condition dendrite smashes, and the upset ratio of jumping-up is 3.0, and each jumping-up reduction ratio of forging stock jumping-up should control 24%-
In the range of 30%.Pulled out, pulled out after upset forging after upset forging, its pulling pulled out is compared for 3.0, the pressure pulled out every time
Lower rate should be also controlled in the range of 24% -30%, and most forging stock is drawn into nearly columned forging stock at last.Pulled out by above-mentioned jumping-up
It can ensure that the porosity defects such as forging internal porosity, shrinkage cavity close, 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
Remain in the range of 800 DEG C -1240 DEG C.
Plate blank molding：Columned forging stock will be drawn into and moved on broadening anvil and pass through jumping-up and form discoideus head plate
Base, the end sealing plate blank front answer upsetting to go out the evagination round table surface with 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 be equally controlled between 800 DEG C -1240 DEG C.
Global formation：Forming ring anvil is installed on hydraulic press, then end sealing plate blank is moved and put to ring anvil forming surface
On forming ring anvil, forming punching head is moved on end sealing plate blank, and make forming punching head center line be located at discoideus 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 20mm/s speed to
Lower punching press, until making end sealing plate blank strike out end socket forging.Forming punching head speed should control the scope 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 incubated in holding furnace, then after being air-cooled to 300 DEG C -400 DEG C, still moves to and 4-6 is incubated in holding furnace
Hour, then 640 DEG C -660 DEG C are heated to 45 DEG C/h-50 DEG C/h firing rate, and it is incubated 12-14 hours in heating furnace
Afterwards, 180 DEG C are cooled to the furnace come out of the stove and be air-cooled to room temperature.
Finished product is processed：Professional etiquette of going forward side by side is sampled in the sampling reserved location of the above-mentioned thick finished product of the end socket through property heat treatment
Determine the Physicochemical test of project, the thick finished product of end socket that Physicochemical test technical conditions are reached through physics and chemistry pass the test carries out mechanical finishing
Work, to reach the size and dimension requirement of qualified end socket, so as to complete the forging of end socket, processing and heat treatment, to form end socket
Finished product.
Claims (10)
1. a kind of nuclear island evaporator head blanking shaped device, 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 drift profiled section（15）With drift apical cap（16）Form,
Drift apical cap（16）Positioned at drift profiled section（15）Lower end, drift profiled section（15）Bus be involute, the involute is female
The shaping 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
Footpath is equal to shaping involute basic circle（13）Radius；Drift apical cap（16）For ball be preced with, the ball hat where crown radius be equal into
Type involute basic circle（13）Radius；The forming ring anvil（2）In circular ring structure, forming ring anvil（2）Inner hole surface for ring anvil into
Type face（21）, the ring anvil forming surface（21）For involute surface, the ring anvil forming surface（21）Involute bus basic circle center of circle position
In forming ring anvil（2）Ring anvil bottom surface（24）On.
2. nuclear island evaporator head blanking shaped device according to claim 1, it is characterised in that：The shaping punching
Head（1）By punch body（14）And punch holder（11）Form, punch body（14）It is fixedly installed in punch holder（11）On.
3. nuclear island evaporator head blanking shaped device according to claim 1, it is characterised in that：The punch holder
（11）In short circular tube structure, in punch holder（11）Center be provided with drift bore（12）.
4. nuclear island evaporator head blanking shaped device according to claim 1, it is characterised in that：The drift into
Type section（15）Shaping involute basic circle（13）Radius is R, the shaping involute basic circle（13）The center of circle and drift apical cap（16）
Place ball centre of sphere distance for a=（1/3-1/2）R.
5. nuclear island evaporator head blanking shaped device according to claim 1, it is characterised in that：The ring anvil into
Type face（21）Involute bus base radius r be less than drift profiled section（15）Shaping involute basic circle（13）Radius R.
6. nuclear island evaporator head blanking shaped device according to claim 5, it is characterised in that：The ring anvil into
Type face（21）Involute bus base radius r=（2/5-3/5）R.
7. one kind carries out the overall stamping forming method of low head using overall punch forming device described in claim 1, it is special
Sign is：The impact forming method comprises the following steps：
（1）Heat blanking：By steel ingot, step heating is to 1210 DEG C -1240 DEG C in heating furnace, from heating furnace after being incubated one hour
Middle taking-up, which is cut, to be chopped end to end, and goes removing oxide layer to form forging stock；
（2）Forging stock upsetting pull：Forging stock jumping-up is forged slightly than being 3.0-3.5；Forging stock is drawn into cylindric, pulling ratio again after forging is thick
For 3.0-3.5；Forging stock upsetting pull temperature control is in the range of 800 DEG C -1240 DEG C；
（3）Plate blank molding：Columned forging stock will be drawn into and be upset as end sealing plate blank, the end sealing plate blank is in discoideus structure, envelope
The center portion thickness of head plate base is thicker than peripheral thickness；
（4）Global formation：End sealing plate blank is moved on forming ring anvil, forming punching head along discoideus end sealing plate blank center line constant speed to
Punch forming next time is end socket forging, 18 ㎜ of drawing velocity/s -22 ㎜/s of forming punching head；
（5）Forging is heat-treated：Above-mentioned end socket forging is heated up to 905 DEG C-925 DEG C, is incubated 6-8 hours, then be air-cooled to 300
DEG C-400 DEG C, after insulation 4-6 hours, then with 45 DEG C/h-50 DEG C/h firing rate 640 DEG C-660 DEG C are heated to, protected
Temperature 12-14 hours, come out of the stove air cooling when being furnace-cooled to 180 DEG C and form the thick finished product of end socket；
（6）Finished product is processed：The above-mentioned thick finished product of the end socket through property heat treatment is sampled, and Physicochemical test is carried out to sample,
The thick finished product of end socket for being up to Physicochemical test technical conditions is machined out to qualified end socket finished product.
8. overall impact forming method according to claim 7, it is characterised in that：The forming punching head is along plectane head plate
The downward punching press of base center line, its punching stroke are end socket base hemispherical inner concave depth.
9. overall impact forming method according to claim 7, it is characterised in that：The forming punching head is along plectane head plate
The downward drawing velocity of base center line is 20 ㎜/s.
10. overall impact forming method according to claim 7, it is characterised in that：The thick finished product of end socket is with processing
Surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710933267.XA CN107695163B (en) | 2017-10-10 | 2017-10-10 | Nuclear island evaporator end socket integral stamping forming device and stamping forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710933267.XA CN107695163B (en) | 2017-10-10 | 2017-10-10 | Nuclear island evaporator end socket integral stamping forming device and stamping forming method |
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| Publication Number | Publication Date |
|---|---|
| CN107695163A true CN107695163A (en) | 2018-02-16 |
| CN107695163B CN107695163B (en) | 2023-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375724A (en) * | 2018-12-29 | 2020-07-07 | 上海新闵重型锻造有限公司 | Manufacturing method of end socket with boss |
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|---|---|---|---|---|
| GB1576708A (en) * | 1976-12-06 | 1980-10-15 | Serck Industries Ltd | Method of and apparatus for making an apertured plate primarily for a heat exchanger |
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| JP2013107126A (en) * | 2011-11-24 | 2013-06-06 | Tsukiboshi Seisakusho:Kk | Method for forming a plurality of grooves in outer circumferential surface of shaft and shaft member formed by the same |
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| WO2016011759A1 (en) * | 2014-07-21 | 2016-01-28 | 中国科学院金属研究所 | Forging method for ultra-high temperature soft core of steel ingot |
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| CN111375724A (en) * | 2018-12-29 | 2020-07-07 | 上海新闵重型锻造有限公司 | Manufacturing method of end socket with boss |
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