CN104175062B - All-fiber-texture large-size double-flange fan main shaft forging method - Google Patents
All-fiber-texture large-size double-flange fan main shaft forging method Download PDFInfo
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- CN104175062B CN104175062B CN201310202086.1A CN201310202086A CN104175062B CN 104175062 B CN104175062 B CN 104175062B CN 201310202086 A CN201310202086 A CN 201310202086A CN 104175062 B CN104175062 B CN 104175062B
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- forging
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
Abstract
The invention discloses an all-fiber-texture large-size double-flange fan main shaft forging method which comprises the steps of raw material smelting quality control, heating, primary firing twice-upsetting and drawing out, number printing, blanket making, secondary firing finish forging forming until a technical dimension of a forged piece is obtained, wherein after being forged, a double-flange fan main shaft forged piece is subjected to primary supercooling, normalizing and tempering heat treatment, rough turning, ultrasonic flaw detection, mechanical property testing, semi finish turning processing, deep hole drilling, stable heat treatment and packaging. The double-flange motor main shaft forged by the all-fiber-texture large-size double-flange fan main shaft forging method is of an all-fiber-texture structure, so that the natural defects that a flange formed by cutting is easy to deform and low in structural balance property and the root is easy to break are completely overcome; the impact mechanical property of the root is improved, the material consumption is reduced, and a requirement of a large-size motor on the main shaft design is met; furthermore, compared with the conventional forging method, the main forging process has the advantages that another operation of firing is reduced, and the economical benefit is improved.
Description
Technical field
The invention belongs to technical field of forging, it is related to a kind of Whole fiber tissue large double-flange electric machine main shaft forging method.
Background technology
The field such as electric power, petrochemical industry, ship equipment maximizes at present, and development is very fast, and the generating set in power plant is built
Constantly increasing.In Generator Set manufacture process, the quality of main shaft quality largely determines generating set and runs
Stability and security.
Existing large double-flange electric machine main shaft forging method is to chop method forging and stamping flange step with triangle marking knife to be used in combination
Lathe tool chip goes out flange stepped portions, is directly to shape the fibr tissue cut-out pressure of material, after the shaping of main shaft forging
Its overall fibr tissue does not have continuity, affects its flange root shock resistance mechanical property, easily makes fracture of root, thing
Therefore, reduce generator service life, deficiency in economic performance, production cost is high.Continuous with large double-flange generator shaft demand
Increase, to the design of double flange electric machine main shafts, production, manufacture and just put forward higher requirement.
Content of the invention
The main object of the present invention is to provide a kind of Whole fiber to organize large double-flange electric machine main shaft forging method, solves existing
Have in large double-flange electric machine main shaft production process and directly machine-shaping is forced in the fibr tissue cut-out of material, so that main shaft
After forging shaping, its overall fibr tissue does not have continuity, flange root shock resistance poor mechanical property, and flange is easily deformed, balances
Property poor, run and easily produce the defect that shake, noise even occur fracture from flange root.
In order to realize goal of the invention, the technical solution adopted in the present invention is that a kind of Whole fiber tissue large double-flange is electric
Owner's axle forging method, comprises the following steps：
Step a：Raw material quality control：The steel ingot smelted using electric arc furnace smelting+external refining+vacuum outgas is as former
Material；
Step b：Steel ingot is entered heating furnace and is heated to 1250 ± 10 DEG C of initial forging temperature, samming is incubated 12 hours；
Step c：First fire time must upset twice and pulling, number print, become base；
The steel ingot vertical heating is placed on upset platform, is placed on upset greatly plate upper end to carry out suppressing upset, upset forging
Than ＞ 2 when stop forging, take out blank along being radially placed on upset platform, upset greatly plate be placed on the wide anvil radial direction compacting in upper end
(WRF) suppress along steel ingot radial direction, drafts 25%, after stopping forging 180 seconds, blank is rotated 90 °, same method is suppressed, drafts
25%, stop forging 180 seconds, pulled out to from all directions with wide anvil up and down, after the completion of carried out with same method secondary suppress upset, radially suppress
And pull out to first base size, upset twice total forging ratio ＞ 4, pull out forging ratio >=4.5, with circular horn print rod after flange location number print
Enter stove heat to be incubated to 1100 DEG C；
Step d：Second fire time forging molding；
The good blank of heating and thermal insulation is come out of the stove, with upper and lower flat anvil, first the region pressure between two flange positions pulls out,
Drafts 18%, then rotate 90 ° pressure pulling, drafts is identical, forms the recessed mark structure between double flanges after being depressed into from all directions, then
Double for first base flange arrangement two side riser one end axis bodies are pulled out, during pulling, upper and lower flat anvil is depressed into eight at flange print
Flange arrangement other end axis body is depressed into from all directions after turning around at flange print by side again, subsequently with circular horn print rod in this section of axle
Body enters line number print near end and stays water outlet end, is subsequently pulled out mouth of a river end axis body at number print, finally round as a ball, essence
Whole to process.Excision rising head, the mouth of a river and clout, alignment, complete to forge during 850 DEG C of final forging temperature；
Step e：Forging is crossed and is cooled to 450 DEG C, and shove charge carries out normalizing+tempering heat treatment after forging；
Step f：Carry out rough turn processing, ultrasonic examination, take bulk sample to make mechanical property, metal lographic examination；
Step g：Semifinishing, drilling deep hole, stable heat treatment, mark, packaging after the assay was approved.
The present invention is further characterized in that, when carrying out raw material quality control in step a, need strict control harmful element and
The content of pernicious gas：S≤0.020, P≤0.015, H≤2ppm, O≤30ppmm, N≤65ppm, Cu≤0.20.
In step b, Heating Steel Ingots adopt three sections of heatings, and concrete heating technical process is：Normal temperature steel ingot is loaded temperature low
Be incubated 5 hours in 450 DEG C of heating furnaces, subsequently on an hourly basis 60 DEG C be warming up to 650 DEG C and be incubated 4 hours, then 60 DEG C on an hourly basis
It is incubated 5 hours, finally 80 DEG C of programming rates are warming up to 1250 DEG C of sammings 2 hours on an hourly basis, insulation 10 is little after being warming up to 850 DEG C
When.
Forging in step e is subcooled detailed process：Will be strong with twin drum motor Quick uniform for 850 DEG C of forging of final forging temperature
It is cooled to 450 DEG C, forging normalizing+drawing process is：Load heat-treatment furnace by crossing the forging being cooled to 450 DEG C, be incubated 5 hours, by every
80 DEG C of hour is warming up to 880 DEG C of sammings 8 hours, comes out of the stove and forces uniformly to be cooled to 320 DEG C soon to heat treatment work area, enters stove insulation 7 little
When, more on an hourly basis 60 DEG C be warming up to 650 DEG C, be incubated blowing out in 60 hours, finally on an hourly basis be not more than 30 DEG C of speed be cooled to
Come out of the stove for less than 200 DEG C, enter to cheat heap and be cooled to normal temperature to terminate.
The invention has the beneficial effects as follows：
The Whole fiber tissue large double-flange electric machine main shaft forging method of the present invention, controls in advance in the selection of material first
Harmful element in material and gas are it is ensured that the degree of purity of steel ingot and crystal grain refinement, upset twice and pull out in the first fire time
Control drafts and forging ratio in growth process, when just base completes, made blank uniformly define Whole fiber organizer completely
To.Due to both controlling drafts, control temperature field and anvil width ratio, the contracting that completely densified and seam material itself exists again
Hole, the genetic defects such as loose.Second fire time directly solid forging flange step, it is to avoid traditional approach cut-out flange at bottom fiber
The defect of tissue, controls temperature field and drafts simultaneously, both ensure that the seam of material internal defect, and turn avoid heavy reduction
Exceed Plastic Deformation Limit of Metals and cause the appearance of organization internal micro-crack.Total forging process reduces than traditional forging method
One fire, economic benefits, the flange main shaft forging has Whole fiber institutional framework, completely eliminate by cutting plus
Work forms that flange root shock resistance poor mechanical property, yielding, balance be poor and the inadequate natural endowment of root easy fracture, meets big
Type motor requires to spindle design.
Brief description
Fig. 1 is the heating artwork forging 45A large double-flange electric machine main shaft using the inventive method；
Fig. 2 is to forge 45A large double-flange electric machine main shaft steel ingot jumping-up pre-structure schematic diagram using the inventive method；
Fig. 3 is structure after the forging technology steel ingot jumping-up forging 45A large double-flange electric machine main shaft using the inventive method
Schematic diagram；
Fig. 4 is to pull out to all directions a number print structure using the inventive method forging 45A large double-flange electric machine main shaft steel ingot
Schematic diagram；
Fig. 5 is to be illustrated using the inventive method forging preliminary forging structure of 45A large double-flange electric machine main shaft flange arrangement
Figure；
Fig. 6 is to forge 45A large double-flange electric machine main shaft molding structure schematic diagram using the inventive method；
Fig. 7 is to forge 45A large double-flange electric machine main shaft heat treatment after forging artwork using the inventive method；
Fig. 8 is the 45A large double-flange electric machine main shaft internal fiber structural representation using the inventive method forging molding.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The forging technology of 45A large double-flange electric machine main shaft, comprises the following steps：
A, the 45A steel smelted through electric arc furnace smelting+external refining+vacuum outgas by raw material quality control requirement, selection
Ingot, as raw material, meets Q/HWG-QW07009-2000, in chemical composition harmful element and gas content be controlled to S≤
0.020, P≤0.015, H≤2ppm, O≤30ppm, N≤65ppm, Cu≤0.20 is it is ensured that the degree of purity of steel and crystal grain refinement；
B carries out preheating insulation 5 hours as shown in figure 1, steel ingot is loaded the heating furnace that temperature is less than 450 DEG C, subsequently presses every
Hours 60 DEG C are warming up to 650 DEG C and are incubated 4 hours, afterwards on an hourly basis 60 DEG C be warming up to 850 DEG C and be incubated 5 hours, finally press often little
When 80 DEG C be warming up to 1250 DEG C of sammings 2 hours, insulation 10 hours after begin forging.
C, as shown in Figures 2 and 3, the good steel ingot of heating and thermal insulation is come out of the stove and stands up on upset platform, initial steel ingot a size of L
=1800, D=950, with upset greatly plate be placed on upper end suppress upset to L=860mm, D=1500mm, during jumping-up forging ratio ＞ 2
Stop forging, take out blank along being radially placed on upset platform, upset greatly plate is placed on upper end WRF method radial direction to suppress, drafts 25%,
After stopping forging 180 seconds, blank is rotated 90 °, then is suppressed with WRF method, drafts is similarly 25%, Temperature Field Control 1050 DEG C with
On, stop forging 180 seconds.Again blank is rotated 45 ° to be pulled out to all directions L=2280mm, D=900mm with wide anvil up and down.On subsequently repeating
The process of stating carry out secondary upset, radially suppress, pull out to all directions L=3680mm, D=700mm, just blank structure is as shown in figure 4, use
Circular horn print rod number print A, B, C, D, E area fed to boiler is heated to 1100 DEG C and is incubated 3 hours.Suppress upset, pulling, every time forging twice
Ratio ＞ 2, primarily to making steel ingot core form three-dimensional compressive stress state, smashing thick columnar grain and preventing and improve ingot shape
Segregation.It is continuously increased the forging ratio at the double flange position of blank, be that next step pulling lays the foundation, fully ensured that double flanges cut greatly
The complete fibr tissue of facial position.Using WRF forging method, control drafts 25%, more than 1050 DEG C of temperature field, using three-dimensional pressure
Stress principle, the Residual hole within seam steel ingot and loose, the exceeded field trash of crushing.Stopping forging 180 seconds to make base after forging conjunction
Material interior tissue is more abundant, healing is more complete.
D, the first base heating is come out of the stove, with upper and lower flat anvil first from Fig. 4 shown in the pressure pulling of C area, drafts 18%, then
Rotate 90 ° pressure pulling, drafts is similarly 18%, 45 ° of pressure pullings of finally rotation to all directions L=900, D=360.As Fig. 5
With shown in Fig. 6, with same method, A area is pulled out to L=2500, D=400mm from all directions, E area pulls out to L=6685, D=380mm
From all directions, print F area with pole number at E area 4000mm, E area is pulled out to L=4200, D=380mm, with upper and lower flat-anvils stretching F area
To from all directions, L=4500, D=350mm, final forging temperature is 850 DEG C, excises rising head against flange root, in F at A area 2500mm
The offset shaft end 800mm position excision mouth of a river, round as a ball, finishing, alignment to process, forging completes.Depressed using flat anvil
When, drafts controls 18%, be according to theory of plastic deformation, it is to avoid in metal sliding by flange root tissue drawing crack,
Rotate 90 ° and depress with 45 °, pulling is mainly to ensure that the uniformity of fibr tissue during pulling.
After the completion of e, forging, it is hung to heat treatment work area and carries out heat treatment after forging, first by forging from 850 DEG C of final forging temperature
Quick mistake is cooled to 450 DEG C, using the residual forging heat of forging, increases the heat treatment process of a crystal grain thinning, had both saved the energy
Consume, make tissue evenly again.Subsequently carry out normalizing+tempering heat treatment according to the Technology for Heating Processing figure shown in Fig. 7, will be heat-treated
Work area cross be cooled to 450 DEG C forging load heat-treatment furnace be incubated 5 hours, 80 DEG C are warming up to 880 DEG C of sammings 2 hours on an hourly basis,
Insulation 6 hours, pressure of then coming out of the stove is entered holding furnace when being cooled to 320 DEG C soon and is incubated 7 hours, more on an hourly basis 60 DEG C be warming up to 650
It is incubated 60 hours after DEG C, blowing out, come out of the stove when being cooled to 200 DEG C with the cooling rate that stove is less than 30 DEG C on an hourly basis and be cooled to into hole heap
Normal temperature.During this 650 DEG C of temperature retention times than the conventional vacuum time increased 30 little when, make first steel ingot recrystallization the time increase
Long, tissue is more uniform, increased the diffusion time to residual hydrogen simultaneously, thoroughly removes presence in forging for the Microamounts of Hydrogen,
Prevention and the generation avoiding micro- white point.
F, the forging qualified to initial survey after Overheating Treatment carry out rough turn processing, rough turn after carry out 100% ultrasonic examination
Inspection, cuts bulk sample and carries out mechanical property, metal lographic examination.
G, through check completely qualified after forging carry out semifinishing, drilling deep hole, stable heat treatment, mark, packaging.
Whole fiber tissue large double-flange electric machine main shaft forging finished product internal fiber institutional framework of the present invention is as shown in Figure 8.
General principle, principal character and the advantages of the present invention of the present invention, above-mentioned embodiment have been shown and described above
It is the principle of the present invention with specification, the present invention also has various change without departing from the spirit and scope of the present invention
And improvement, these changes and improvements both fall within the range of claimed invention.The protection domain of application claims is by weighing
Sharp claim and its equivalent define.
Claims (4)
1. a kind of Whole fiber tissue large double-flange electric machine main shaft forging method is it is characterised in that comprise the following steps：
Step a：Raw material quality control：The steel ingot smelted using electric arc furnace smelting+external refining+vacuum outgas is as former material
Material；
Step b：Steel ingot is entered heating furnace and is heated to 1250 ± 10 DEG C of initial forging temperature, samming is incubated 12 hours；
Step c：First fire time must upset twice and pulling, number print, become base；
The steel ingot vertical heating is placed on upset platform, is placed on upset greatly plate upper end to carry out suppressing upset, upset forging ratio ＞ 2
When stop forging, take out blank along being radially placed on upset platform, upset greatly plate be placed on upper end WRF method to suppress along steel ingot radial direction, pressure
Blank is rotated 90 ° after stopping forging 180 seconds, same method is suppressed, drafts 25% by lower amount 25%, stops forging 180 seconds；With wide up and down
Anvil pulls out to from all directions, after the completion of carried out with same method secondary suppress upset, radially suppress and pull out to first base size, pier twice
Slightly total forging ratio ＞ 4, pulls out forging ratio >=4.5, is heated to 1100 DEG C of insulations with circular horn print rod in flange location number print fed to boiler；
Step d：Second fire time forging molding；
The good blank of heating and thermal insulation is come out of the stove, with the first region pressure pulling between two flange positions of upper and lower flat anvil, pressure
Amount 18%, then rotate 90 ° pressure pulling, drafts is identical, forms the recessed mark structure between double flanges after being depressed into from all directions, then will just
The double flange arrangement two side riser one end axis body of base is pulled out, and during pulling, upper and lower flat anvil is depressed into from all directions at flange print, falls
Again flange arrangement other end axis body is depressed into from all directions at flange print after head, subsequently close in this section of axis body with circular horn print rod
End is entered line number print and is stayed water outlet end, is subsequently pulled out mouth of a river end axis body at number print, finally round as a ball, finishing is to work
Skill size；Excision rising head, the mouth of a river and clout, alignment, complete to forge during 850 DEG C of final forging temperature；
Step e：Forging is crossed and is cooled to 450 DEG C, and shove charge carries out normalizing+tempering heat treatment after forging；
Step f：Carry out rough turn processing, ultrasonic examination, take bulk sample to make mechanical property, metal lographic examination；
Step g：Semifinishing, drilling deep hole, stable heat treatment, mark, packaging after the assay was approved.
2. as claimed in claim 1 a kind of Whole fiber tissue large double-flange electric machine main shaft forging method it is characterised in that institute
State when carrying out raw material quality control in step a, need the strict content controlling harmful element and pernicious gas：S≤0.020, P
≤ 0.015, H≤2ppm, O≤30ppmm, N≤65ppm, Cu≤0.20.
3. as claimed in claim 1 a kind of Whole fiber tissue large double-flange electric machine main shaft forging method it is characterised in that institute
State Heating Steel Ingots in step b and adopt three sections of heatings, concrete heating technical process is：Normal temperature steel ingot is loaded temperature and is less than 450
DEG C heating furnace be incubated 5 hours, subsequently on an hourly basis 60 DEG C be warming up to 650 DEG C be incubated 4 hours, more on an hourly basis 60 DEG C be warming up to
It is incubated 5 hours after 850 DEG C, finally 80 DEG C of programming rates are warming up to 1250 DEG C of sammings 2 hours on an hourly basis, be incubated 10 hours.
4. as claimed in claim 1 a kind of Whole fiber tissue large double-flange electric machine main shaft forging method it is characterised in that institute
Stating the supercooling of the forging in step e detailed process is：850 DEG C of forging twin drum motor Quick uniform of final forging temperature is cooled to by force
450 DEG C, forging normalizing+drawing process is：Load heat-treatment furnace by crossing the forging being cooled to 450 DEG C, be incubated 5 hours, on an hourly basis
80 DEG C are warming up to 880 DEG C of sammings 8 hours, come out of the stove and force uniformly to be cooled to 320 DEG C soon to heat treatment work area, enter stove and are incubated 7 hours, then
60 DEG C are warming up to 650 DEG C on an hourly basis, are incubated blowing out in 60 hours, are finally not more than 30 DEG C of speed on an hourly basis and are cooled to 200 DEG C
Hereinafter come out of the stove, enter to cheat heap and be cooled to normal temperature to terminate.
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| CN201310202086.1A CN104175062B (en) | 2013-05-28 | 2013-05-28 | All-fiber-texture large-size double-flange fan main shaft forging method |
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| CN201310202086.1A CN104175062B (en) | 2013-05-28 | 2013-05-28 | All-fiber-texture large-size double-flange fan main shaft forging method |
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| CN104175062B true CN104175062B (en) | 2017-02-22 |
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| CN104972050A (en) * | 2015-06-16 | 2015-10-14 | 何庆堃 | Forging technology for middle shaft of loading machine |
| CN106040952A (en) * | 2016-08-01 | 2016-10-26 | 东北特钢集团大连特殊钢有限责任公司 | Method for manufacturing spindle of large monoblock forged water turbine |
| CN111451435A (en) * | 2020-04-28 | 2020-07-28 | 河南中原特钢装备制造有限公司 | Forging control method for large-size step shaft part |
| CN111889613A (en) * | 2020-07-10 | 2020-11-06 | 陕西华威科技股份有限公司 | Full-fiber large conical shaft blank forging process |
| CN111842748B (en) * | 2020-07-10 | 2022-08-16 | 陕西华威科技股份有限公司 | Forging method of low-plasticity steel forging |
| CN112846677A (en) * | 2020-12-07 | 2021-05-28 | 南昌齿轮锻造厂 | Vertical forging and rough and finish turning process for driving spiral bevel gear with boss |
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| CN114309402B (en) * | 2021-12-29 | 2023-10-20 | 大冶特殊钢有限公司 | High-temperature alloy difficult to deform and forging method thereof |
| CN115740314B (en) * | 2022-11-24 | 2023-05-16 | 南京工程学院 | High-strength large forging anti-cracking energy-saving forging process |
| CN116060562B (en) * | 2023-03-07 | 2023-06-30 | 张家港广大特材股份有限公司 | Forging and drawing process for austenitic acid-resistant alloy steel shaft piece |
| CN116493886B (en) * | 2023-06-28 | 2023-09-08 | 山西新世纪锻造股份有限公司 | Processing technology of sealing flange |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2659848B2 (en) * | 1990-05-29 | 1997-09-30 | 三菱重工業株式会社 | Isothermal forging of short fiber FRM |
| CN101314202B (en) * | 2008-06-02 | 2010-04-21 | 江阴振宏重型锻造有限公司 | Method for producing wind-electricity principal axis by gathering stock full fibre upset forging |
| CN102615478B (en) * | 2012-02-28 | 2015-02-04 | 杭州荣力铸锻有限公司 | Forging process of wind power main shaft |
| CN102699637B (en) * | 2012-06-26 | 2015-06-10 | 江苏金源锻造股份有限公司 | Process for forging main shaft flange of wind driven generator |
| CN102806291B (en) * | 2012-08-24 | 2014-07-23 | 江苏凌飞锻造有限公司 | Wind-powered main shaft forging method |
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Address after: Weiyang Road West of Shaanxi petrochemical 710086 city of Xi'an Province, No. 80 Patentee after: SHAANXI HUAWEI POLYTRON TECHNOLOGIES Inc. Address before: Weiyang Road West of Shaanxi petrochemical 710086 city of Xi'an Province, No. 80 Patentee before: SHAANXI HUAWEI FORGING Co.,Ltd. |
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Denomination of invention: Forging method of large double flange motor spindle with all fiber structure Effective date of registration: 20200811 Granted publication date: 20170222 Pledgee: Shaanxi SME financing Company limited by guarantee Pledgor: SHAANXI HUAWEI POLYTRON TECHNOLOGIES Inc. Registration number: Y2020610000119 |
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Denomination of invention: Forging method of main shaft of large double flange motor with full fiber structure Effective date of registration: 20210902 Granted publication date: 20170222 Pledgee: Shaanxi SME financing Company limited by guarantee Pledgor: SHAANXI HUAWEI POLYTRON TECHNOLOGIES Inc. Registration number: Y2021980008844 |
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Date of cancellation: 20230922 Granted publication date: 20170222 Pledgee: Shaanxi SME financing Company limited by guarantee Pledgor: SHAANXI HUAWEI POLYTRON TECHNOLOGIES Inc. Registration number: Y2021980008844 |
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