CN102773314B - Shape-correcting method for cone-shaped cylinder after deformation of heat treatment for steam generator of nuclear power equipment - Google Patents
Shape-correcting method for cone-shaped cylinder after deformation of heat treatment for steam generator of nuclear power equipment Download PDFInfo
- Publication number
- CN102773314B CN102773314B CN201110118171.0A CN201110118171A CN102773314B CN 102773314 B CN102773314 B CN 102773314B CN 201110118171 A CN201110118171 A CN 201110118171A CN 102773314 B CN102773314 B CN 102773314B
- Authority
- CN
- China
- Prior art keywords
- workpiece
- press
- heat treatment
- steam generator
- section
- 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.)
- Active
Links
Landscapes
- Forging (AREA)
Abstract
The invention discloses a shape-correcting method for a cone-shaped cylinder after deformation of heat treatment for a steam generator of nuclear power equipment, wherein the shape of a cone-shaped cylinder forge piece for the steam generator after deformation of heat treatment is corrected by using a megaton press. The method comprises the steps of: 1, measuring the size of a cone-shaped cylinder workpiece; 2, filling axis of the workpiece horizontally; 3, placing the workpiece on the press so that a hammering block of the press is aligned with the section of the workpiece to be corrected in shape, and rotating the workpiece so that the part of the shape-corrected section with the maximum deformation is below the hammering block of the press, and implementing a shape-correcting process; 4, rotating the workpiece so that the other end of the shape-corrected section is below the hammering block of the press, and repeating the shape-correcting process; and 5, carrying out destressing thermal treatment. After shape correction and destressing thermal treatment, sizes of ends of the cone-shaped cylinder can meet the requirements of a delivery chart, and at least 5mm margin is reserved for a single edge.
Description
Technical field
The present invention relates to a kind of manufacture method of nuclear power generating equipment, be specifically related to the straightening method after a kind of nuclear power generating equipment steam generator conical shell heat treatment deformation.
Background technology
At present, global nuclear power has entered a high-speed developing period, and the nuclear forging market prospects in China and even the world are boundless.Along with the increase of the installed capacity of nuclear power generating sets, the heavy forging size of nuclear island primary device critical component steam generator, pressure vessel, voltage-stablizer is increasing.
Along with the increase of nuclear island primary device size, corresponding forging ' s block dimension also increases thereupon, and the manufacture difficulty of forging also increases thereupon.Wherein, the heat treatment deformation of steam generator conical shell forging is exactly along with forging ' s block dimension increases one of problem produced.Because the diameter of this conical shell is large, wall thickness is little, cannot avoid the heat treatment deformation of conical shell forging, and this distortion can cause meeting follow-up accurately machined dimensional requirement.
Summary of the invention
Technical problem to be solved by this invention is to provide the straightening method after a kind of nuclear power generating equipment steam generator conical shell heat treatment deformation, and it can correct shape the conical shell after distortion.
For solving the problems of the technologies described above, the technical solution of the straightening method after nuclear power generating equipment steam generator conical shell heat treatment deformation of the present invention is:
Use ten thousand tons of press, the steam generator conical shell forging deformed corrected shape, comprise the following steps through heat treatment:
The first step, measures the size of conical shell workpiece, and measurement size is carried out cue mark on workpiece;
Described measuring method is: at the selected shaft section of the large end of workpiece, measure minimum and maximum " diameter " on this shaft section;
At the selected shaft section of the small end of workpiece, measure minimum and maximum " diameter " on this shaft section.
Second step, becomes level by the axis pad of workpiece, to make the axis of pressure direction perpendicular to conical shell of press; Workpiece is fixed in the axial direction;
3rd step, is placed on workpiece on press, makes press hammering block alignment pieces need the cross section of school shape; Turning of work piece, makes the deflection maximum of school tee section be positioned at the below of press hammering block, implements school shape process;
Described school shape process is: slowly depress, and implement first time and depress process, drafts is 120mm for the first time, keeps lifting press hammering block after 3 ~ 10 minutes after pressure; After bounce-back is stable, measure the size at this place, if do not meet the requirements of size, second time makes press slowly depress, and second time drafts is not more than 120mm, keeps lifting press hammering block after 3 ~ 10 minutes, again measure, until size meets the demands after pressure.
4th step, turning of work piece, makes the other end of school tee section be positioned at the below of press hammering block, repeats school shape process, until this cross section of workpiece is tending towards positive circle, this shaft section size everywhere all meets delivery figure size and the monolateral machining allowance being no less than 5mm in this optional position, cross section;
5th step, carries out destressing heat treatment.
Described destressing heat-treating methods is: workpiece is put into heat-treatment furnace, makes workpiece be incubated 2 ~ 4 hours at the temperature of 300 ~ 350 DEG C, then makes the temperature of heat-treatment furnace be warming up to 600 ± 20 DEG C with the speed of≤50 DEG C/h, be incubated 2 ~ 6 hours; Then make the temperature of heat-treatment furnace be cooled to 350 ± 20 DEG C with the speed of≤50 DEG C/h, last air cooling is to room temperature.
The technique effect that the present invention can reach is:
The present invention is after school shape and destressing heat treatment, and each end size of conical shell can meet delivery figure requirement, and at least monolaterally has 5mm surplus.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of conical shell;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the schematic diagram that the straightening method after adopting nuclear power generating equipment steam generator conical shell heat treatment deformation of the present invention corrects shape the large end of workpiece;
Fig. 4 is the schematic diagram adopting the present invention to correct shape workpiece small end;
Fig. 5 is the schematic diagram of destressing heat-treating methods of the present invention.
Detailed description of the invention
Straightening method after nuclear power generating equipment steam generator conical shell heat treatment deformation of the present invention, use ten thousand tons of press (as 16500 tons of hydraulic presses), for correcting shape the steam generator conical shell forging deformed through heat treatment, for AP1000 steam generator conical shell forging: the minimum dimension of conical shell is: large end internal diameter is
small end inner diameter is
the material of conical shell is 18MND5, weight about 50 tons, requires that the large end internal diameter of the conical shell after the shape of school is
small end inner diameter is
monolateral have 5mm surplus;
Comprise the following steps:
The first step, measures the size of conical shell workpiece, and measurement size is carried out cue mark on workpiece;
Measuring method is:
The selected shaft section of the large end of workpiece (this shaft section is and measures cross section), measure minimum and maximum " diameter " on this shaft section;
At the selected shaft section of the small end of workpiece, measure minimum and maximum " diameter " on this shaft section;
At the selected shaft section of the reducer of workpiece, measure minimum and maximum " diameter " on this shaft section;
As shown in Figure 1 and Figure 2, selected four of the present embodiment measures cross section, and four measurement points are selected in each measurement cross section, and the measurement size of each measurement point is as shown in the table:
From distortion size, small end size conforms delivery figure, without the need to school shape, and holds greatly maximum to be
larger than delivery figure internal diameter, cannot process.In order to ensure finishing size, monolateral should staying is not less than 5mm allowance, the internal diameter size of such 1-3 measurement point should school shape to internal diameter
Second step, utilizes chopping block that the axis pad of workpiece is become level, to make the axis of pressure direction perpendicular to conical shell of press; Workpiece is fixed in the axial direction;
3rd step, is placed on workpiece on press, makes " diameter " maximum cross-section (namely needing the large end section of school shape) of the large end of workpiece measured by press hammering block aligning, as shown in Figure 3; Turning of work piece, makes the deflection maximum of school tee section (namely measuring maximum " diameter " place in cross section, 1-3 measurement point in figure) be positioned at the below (just to press hammering block) of press hammering block, implements school shape process;
School shape process is: slowly depress, implement first time and depress process, for preventing because excessive velocities makes the stress of generation have little time release, drafts is 120mm (this drafts is the minimum of a value that surface of the work can be made to produce plastic deformation) for the first time, keep after pressure lifting press hammering block after 3 ~ 10 minutes, now conical shell part bounce-back; After bounce-back is stable, measure the size of this place (1-3 measurement point), recording real drafts is for the first time 10mm; Owing to not reaching requirement size, second time makes press slowly depress, secondary drafts is determined according to the concrete size after workpiece first anvil, secondary drafts is 100mm, keep after pressure lifting press hammering block after 3 ~ 10 minutes, again measure, recording secondary real drafts is 6mm, and now 1-3 measurement point is of a size of
meet delivery figure size.
Weigh because nuclear power product is large, can produce very large internal stress after pressure, if decontroled rapidly, workpiece can recover former state substantially, can not produce appreciable results, and the present invention lifts press hammering block again after keeping 3 ~ 10 minutes after depression, can guarantee school shape effect.
4th step, turning of work piece, the other end of school tee section (namely school tee section becoming the point of 180 degree with the deflection maximum described in the 3rd step) is made to be positioned at the below of press hammering block, repeat school shape process, until this cross section of workpiece is tending towards positive circle, this shaft section size everywhere all meets delivery figure size and ensures the monolateral machining allowance being no less than 5mm in this optional position, cross section;
5th step, if the small end of workpiece also needs school shape, makes " diameter " maximum cross-section (namely needing the little end section of school shape) of the workpiece small end measured by press hammering block aligning, as shown in Figure 4; Turning of work piece, makes the deflection maximum of small end school tee section (namely measuring maximum " diameter " place in cross section) be positioned at the below of press hammering block, implements school shape process;
6th step, carries out destressing heat treatment after the shape of school immediately;
Due to the difference of deflection, only there is plastic deformation at surfaces externally and internally in part cylindrical shell, the elastic region in cylindrical shell wall thickness centre is pind down by this part plastic deformation, therefore the cold conditions distortion of forging can make itself to there is very large internal stress, this part stress must discharge in time, if park the long period after the shape of school not carry out destressing heat treatment, workpiece will produce the trend before recovering school shape, and produces certain amount of recovery;
Workpiece as shown in Figure 5, is put into heat-treatment furnace by destressing heat-treating methods, makes workpiece be incubated 2 ~ 4 hours at the temperature of 300 ~ 350 DEG C, then makes the temperature of heat-treatment furnace be warming up to 600 ± 20 DEG C with the speed of≤50 DEG C/h, be incubated 2 ~ 6 hours; Then make the temperature of heat-treatment furnace be cooled to 350 ± 20 DEG C with the speed of≤50 DEG C/h, last air cooling is to room temperature;
7th step, after destressing heat treatment, carries out dimensional measurement again to forging, guarantees to meet fine finishining delivery figure size.
Claims (6)
1. the straightening method of nuclear power generating equipment steam generator after conical shell heat treatment deformation, is characterized in that: use ten thousand tons of press, corrects shape, comprise the following steps the steam generator conical shell workpiece deformed through heat treatment:
The first step, measures the size of conical shell workpiece, and measurement size is carried out cue mark on workpiece;
Second step, becomes level by the axis pad of workpiece, to make the axis of pressure direction perpendicular to conical shell of press; Workpiece is fixed in the axial direction;
3rd step, is placed on workpiece on press, makes press hammering block alignment pieces need the cross section of school shape; Turning of work piece, makes the deflection maximum of school tee section be positioned at the below of press hammering block, implements school shape process;
4th step, turning of work piece, makes the other end of school tee section be positioned at the below of press hammering block, repeats school shape process, until this cross section of workpiece is tending towards positive circle, this cross section size everywhere all meets delivery figure size and the monolateral machining allowance being no less than 5mm in this optional position, cross section;
5th step, carries out destressing heat treatment.
2. the straightening method after nuclear power generating equipment steam generator conical shell heat treatment deformation according to claim 1, it is characterized in that: the measuring method of the described first step is: at the selected shaft section of the large end of workpiece, measure minimum and maximum " diameter " on this shaft section;
And/or at the selected shaft section of the small end of workpiece, measure minimum and maximum " diameter " on this shaft section.
3. the straightening method after nuclear power generating equipment steam generator conical shell heat treatment deformation according to claim 1, it is characterized in that: the school shape process of described 3rd step is: slowly depress, implement first time and depress process, keep after pressure lifting press hammering block after 3 ~ 10 minutes; After bounce-back is stable, measure the size at this place, if do not meet the requirements of size, second time makes press slowly depress, and keeps lifting press hammering block after 3 ~ 10 minutes, again measure, until size meets the demands after pressure.
4. the straightening method after nuclear power generating equipment steam generator conical shell heat treatment deformation according to claim 3, is characterized in that: the displacement of described first time pressure is 120mm.
5. the straightening method of nuclear power generating equipment steam generator after conical shell heat treatment deformation according to claim 3 or 4, is characterized in that: the displacement of described second time pressure is not more than 120mm.
6. the straightening method after nuclear power generating equipment steam generator conical shell heat treatment deformation according to claim 1, it is characterized in that: described 5th step destressing heat-treating methods is: workpiece is put into heat-treatment furnace, workpiece is made to be incubated 2 ~ 4 hours at the temperature of 300 ~ 350 DEG C, then make the temperature of heat-treatment furnace be warming up to 600 ± 20 DEG C with the speed of≤50 DEG C/h, be incubated 2 ~ 6 hours; Then make the temperature of heat-treatment furnace be cooled to 350 ± 20 DEG C with the speed of≤50 DEG C/h, last air cooling is to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110118171.0A CN102773314B (en) | 2011-05-09 | 2011-05-09 | Shape-correcting method for cone-shaped cylinder after deformation of heat treatment for steam generator of nuclear power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110118171.0A CN102773314B (en) | 2011-05-09 | 2011-05-09 | Shape-correcting method for cone-shaped cylinder after deformation of heat treatment for steam generator of nuclear power equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102773314A CN102773314A (en) | 2012-11-14 |
| CN102773314B true CN102773314B (en) | 2015-04-22 |
Family
ID=47118550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110118171.0A Active CN102773314B (en) | 2011-05-09 | 2011-05-09 | Shape-correcting method for cone-shaped cylinder after deformation of heat treatment for steam generator of nuclear power equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102773314B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716616B (en) * | 2017-10-11 | 2019-11-19 | 江苏强盛汽配制造有限公司 | A kind of braking automobile adjustment arm arm body rod portion heat treatment deformation correction process |
| CN109702049A (en) * | 2017-10-26 | 2019-05-03 | 天津市东达伟业机车车辆有限公司 | A kind of alignment tooling of novel steel rail clamping plate |
| CN109702052A (en) * | 2019-01-02 | 2019-05-03 | 上海电气上重铸锻有限公司 | A kind of thin-wall barrel distortion correcting method and system |
| CN112453115A (en) * | 2020-11-09 | 2021-03-09 | 上海中船三井造船柴油机有限公司 | Mechanical cold pressing correction method for bending deformation connecting rod |
| CN117272552B (en) * | 2023-11-23 | 2024-02-09 | 中南大学 | Barrel thermal correction method and barrel thermal correction tool design method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924529A (en) * | 1982-08-02 | 1984-02-08 | Kishimoto Akira | Correction of neck in part of can |
| US4816089A (en) * | 1987-06-06 | 1989-03-28 | Westinghouse Electric Corp. | Process for heat treating a heat exchanger tube surrounded by a support plate |
| CN101049621A (en) * | 2007-05-16 | 2007-10-10 | 河南科隆石化装备有限公司 | Spinner |
| CN201217030Y (en) * | 2008-04-09 | 2009-04-08 | 赵文阁 | Double-curved surface forming lapping machine |
| CN101850397A (en) * | 2009-03-31 | 2010-10-06 | 上海重型机器锻件厂 | Forging method of large-scale circular cylinder body and three-point anvil adopted by same |
| CN101564750B (en) * | 2009-04-17 | 2011-02-02 | 二重集团（德阳）重型装备股份有限公司 | Process and device for forming straight-edge conical cylinder forged piece of nuclear power evaporator |
-
2011
- 2011-05-09 CN CN201110118171.0A patent/CN102773314B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102773314A (en) | 2012-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102773314B (en) | Shape-correcting method for cone-shaped cylinder after deformation of heat treatment for steam generator of nuclear power equipment | |
| CN103846377B (en) | The cogging forging method of near β titanium alloy Ti-7333 | |
| CN103042075B (en) | Method for correcting tubular structure diameter distortion by flame | |
| CN101745784A (en) | Simple forming process of seal head for titanium alloy cylinder | |
| CN102248362A (en) | Method for manufacturing end socket of voltage stabilizer for nuclear power | |
| CN104148446B (en) | A kind of utilize the graphite jig antidote to wrought titanium alloy foundry goods | |
| CN101643832A (en) | Method for preventing circularity over tolerance of large gear ring after heat treatment | |
| CN107063838A (en) | RPV simplifies elastic-plastic-fracture analysis method under a kind of extreme accident conditions based on RCC M specifications | |
| CN204396531U (en) | A kind of mould for school shape inside and outside titanium alloy member | |
| CN106040953B (en) | A kind of forging technology of large-scale wind electricity main-axis | |
| CN103567337B (en) | Dual-phase steel hot processing method | |
| CN104213036A (en) | Production method suitable for low-alloy valve body under acidic working condition | |
| CN102851671A (en) | Carborized quenched gear ring self-rounding heat treatment method | |
| CN113020902A (en) | Method for machining inner wall of air inlet cone | |
| CN109570913A (en) | High temperature alloy ring rolling and bulging combined shaping method | |
| CN102453846A (en) | Heat treatment method for corrosion resistant alloy N08810 steel plate | |
| CN206702438U (en) | A kind of wind-power tower top flange welding deformation controller in hole | |
| CN112795759B (en) | Method for accurately controlling size of large door-shaped three-dimensional stainless steel bent pipe | |
| CN107234149A (en) | A kind of card punch cold sizing technique | |
| CN114226603A (en) | 3J21 thin-wall wave spring aging tool and wave spring machining method | |
| CN109266982B (en) | Aging shaping method for large aluminum alloy ring piece | |
| CN106391771A (en) | Machine part correction method | |
| CN102825190A (en) | Method for forging and compacting thick tube plate of nuclear power equipment | |
| CN206509361U (en) | It is a kind of continuously to adjust the fixture in school shape gap | |
| CN105921948A (en) | Efficient and precise forming method of large and medium hollow disc-shaped forging with complex structure |
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 | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161125 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy Machines Plant Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy Machines Plant Co., Ltd. |