CN102806291A - Wind-powered main shaft forging method - Google Patents
Wind-powered main shaft forging method Download PDFInfo
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- CN102806291A CN102806291A CN2012103043616A CN201210304361A CN102806291A CN 102806291 A CN102806291 A CN 102806291A CN 2012103043616 A CN2012103043616 A CN 2012103043616A CN 201210304361 A CN201210304361 A CN 201210304361A CN 102806291 A CN102806291 A CN 102806291A
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Abstract
The invention relates to a wind-powered main shaft forging method. The wind-powered main shaft forging method comprises the following steps of inspecting a material; heating the material; taking out a blank which is formed by annealing the material for the first time, pre-forging, upsetting, drawing and printing the blank, performing pre-forging to form the blank, and blanking; finally forging the blank to form a main shaft by annealing for the second time, forging a flange end on a hollow rotary worktable, and drawing the main shaft until a shaft body has forging size; performing re-crystallization normalized tempering thermal treatment by using a one-time thermal loading furnace after forging the wind-powered main shaft; roughly turning the wind-powered main shaft and detecting flaws through ultrasonic wave; hardening and tempering the wind-powered main shaft, and performing nondestructive inspection and physical and chemical inspection on the wind-powered main shaft; finely turning the wind-powered main shaft; and packaging the wind-powered main shaft. The wind-powered main shaft forging method provided by the invention has the characteristics that the efficiency is high, the energy is saved, the cost is reduced, and the forging quality is improved.
Description
Technical field
A kind of wind power principal axis forging method that the present invention relates to belongs to the forging production technical field.
Background technology
At present, along with develop rapidly and the maturation of wind-powered electricity generation industry in China, the forging output of wind power principal axis has obtained very large raising at home.The manufacturing development trend of nowadays large-scale MW wind power principal axis is for to develop to the maximization direction, and its forge weight is more and more heavier, and that forging quality requires is also increasingly high, manufacturing and designing and forge production method and just have higher requirement wind power principal axis.
What the wind power principal axis forging method of main flow still adopted now is traditional Forging Technology and forging after-baking technology.Adopt this forging mode exist below many deficiencies: adopt traditional forging method, heating causes forging fire consumption to strengthen often; The combustion gas power consumption is big; Forging time is long, and forging efficient is low, and staff labor intensity is big; Forge precision and can not get effective control, be unfavorable for the development trend of following energy-saving and emission-reduction.
Summary of the invention
Technical problem to be solved by this invention provides a kind of wind power principal axis forging method, and it is numerous and diverse that this method has overcome in traditional forging method process, and highly energy-consuming is inefficient, forges problems such as precision is not high, helps the development trend of following energy-saving and emission-reduction.
A kind of wind power principal axis forging method of the present invention, it mainly may further comprise the steps:
Step a selects the steel ingot raw material that adopt electric furnace smelting+LF (external refining)+VD (vacuum degassing) to smelt.
Step b advances stove with steel ingot and is heated to 1240 ± 10 ° of C of initial forging temperature, and insulation is more than 10 hours;
Step c, the first fiery ejection blocking base:
Steel ingot in the stove is taken out, and flat anvil is put into jumping-up drain cap hole with jaw then to steel ingot rising head end bar hold about using; Adopt the powerful jumping-up of press upper flat plate, this moment, steel ingot jumping-up forging ratio was 2.2 ± 0.2, took out forging stock; Manipulator clamping jaw adopts then and goes up press plane, lower platform; Adopt big plane cross to suppress the jumping-up forging method; Radially directly adopt big up and down plane to suppress the diameter base size of jumping-up to wind power principal axis flange end material to forging stock, the forging stock half-twist continues to suppress jumping-up with big plane up and down and forges and presses the diameter base size to wind power principal axis flange end material.This moment, the solid forging of forging stock increased to 4.5～5 than, can forge fully and close the steel ingot central defect, accomplished broken as-cast structure, forged and closed internal void property defective, improved the forging quality of wind power principal axis axle.Continue to use plane, lower platform then, WHF forging method (wide anvil brute force is depressed forging method), to from all directions, diameter dimension is the diameter base size of wind power principal axis flange end material with blank forging and pressing pulling.Adopt upper and lower flat anvil then,, divide flange end material length and axle body end material long forging stock number seal.The flange end material is carried out round as a ball, axle body end material goes out pin and pulls out the base size to spindle rod portion, and this bar portion diameter dimension needs less than circular rotary table patrix circle internal diameter 20～30mm, and earnestly jaw advances stove and is heated to 1220 ° of C ± 10 ° C, and insulation is more than 3 hours;
Steps d, the second fiery finish forging:
Become the forging of T type to blocking, hang in hollow rotary table, adopt the maximum forging pressure of press directly the flange end material to be suppressed jumping-up with the press upper mounting plate with driving; Adopt last flat anvil that the flange end material is rotated then and forge and press to the forging ' s block dimension height, smooth; Take out forging stock, manipulator clamping wind-powered electricity generation axle small end, flat anvil in the employing, the lower platform forging method carries out round as a ball, smooth to the flange end external diameter; Manipulator clamping flange end adopts flat anvil up and down then, and forging ' s block dimension is arrived in the axle body forging; Accomplish and forge.
Step e, air cooling carries out a hot charging stove positive tempering heat treatment that is recrystallized to workpiece.
Step f carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light.
Step g, modified, mechanical performance, metallographic, hardness detects, nondestructive inspection, finish turning, packing.
As improvement, the steel ingot heating means of described step b are divided into hot steel ingot processing technology and cold steel ingot heating process, and detailed process is:
1) hot steel ingot heating process: the surface temperature for steel plant's heat is sent is regarded as hot steel ingot greater than the steel ingot of 400 ° of C; Its heating process is: insulation is more than 3 hours under 700 ° of C～750 ° C furnace temperature; Be warming up to initial forging temperature by the heating furnace peak power again, insulation;
2) cold steel ingot heating process: regard as cold steel ingot less than the steel ingot of 400 ° of C for surface temperature; Its heating process is: be encased in the hot stove that the highest shove charge furnace temperature is lower than 400 ° of C earlier, insulation is heated to 850 ± 10 ° of C more than 4 hours then under charging temperature; Per hour the temperature recruitment is less than 60 ° of C; Be incubated again more than 6 hours, be warming up to initial forging temperature by the heating furnace peak power again, insulation.
As improvement; The jumping-up forging method suppressed in big plane cross among the described step c; Carry out big plane cross when suppressing jumping-up and forging, this moment forging ratio of height to diameter (H/D) less than 1, so that the σ r of forging heart portion and σ θ are converted into compression by tension; Make forging heart portion be in the three-dimensional compressive stress state, and can increase the forging ratio of forging stock to greatest extent.Can better forge and close the steel ingot central defect, accomplish broken as-cast structure, forge and close internal void property defective, improve the forging quality of wind power principal axis.
As improvement, the hollow rotary table in the said steps d; The center of turntable is hollow, and said turntable is hollow turntable base by the bottom, and top is made up of the identical packing ring of interior external diameter and the mould circle at top, and the chamfering R value of this mould circle needs the chamfering R value greater than the wind power principal axis flange end.Because of adopting the mould circle of big chamfering R; When carrying out the second fire forging; When the press upper mounting plate is suppressed forging to the flange end material; The mould circle of big chamfering R can reduce the press vertical direction to be concentrated the shearing stress at forging stock center, reduces blank downward displacement on the vertical direction when the forging and pressing flange end, thereby effectively raises the forging precision of forging.
As improvement, the positive tempering heat treatment that is recrystallized of a hot charging stove among the said step e; The workpiece stove is cooled to 550 ° of C ± 20 ° C outward, advanced stove insulation 3-4 hour, heat temperature raising to 930 ± 10 ° C again, per hour the temperature recruitment is less than 80 ℃/hour; Be incubated 12 hours, come out of the stove then, evenly force blast-cold, make the forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C with air blast; Advance the stove insulation again, temperature retention time is no less than 6 hours, then heat temperature raising to 650 ± 10 ° C; In the temperature-rise period, per hour the temperature recruitment less than 80 ° C/ hour, be incubated 15 hours; With the stove cooling, control forging per hour temperature drop treats that smaller or equal to 40 ° of C forging drops to about 400 ° of C again; Continue control forging cooling rate less than 20 ° C/ hour, when the forging stove is chilled to 150 ° below the C, the forging cooling of can coming out of the stove.
The invention has the beneficial effects as follows: the forging quality requirement that the forging that high-efficiency and energy-saving type wind power principal axis forging method of the present invention, the first fiery blocking base have just been guaranteed is strict, just reduced forging process, practice thrift forging time, reduced forging fire consumption; Second fire is employed in when forging and pressing flange end on the big chamfering R value mould circle, has effectively controlled the downward in vertical direction displacement of forging stock blank, has improved the forging precision of forging; The positive tempering heat treatment process replacement need in the past that once are recrystallized that adopt after forging adopt the Technology for Heating Processing of twice positive tempering of recrystallization; Practiced thrift a large amount of combustion gas power consumptions; And improved operating efficiency; Greatly reduce working strength of workers and production cost, improve the forging quality of wind power principal axis, realized the road for development of wind power principal axis high-efficiency and energy-saving type.
Description of drawings
Fig. 1 is the cold steel ingot heating process of the present invention figure.
Fig. 2 is that heat of the present invention is sent hot steel ingot heating process figure.
Fig. 3 is a forging hot charging stove carrying out after the present invention the forges positive tempering heat treatment process figure that is recrystallized.
Fig. 4 is forging of the present invention first fire when forging, and forging adopts big plane cross to suppress the jumping-up forging method and forges the back sketch map.
Fig. 5 is forging of the present invention second fire when forging, and flange end is forging and pressing distortion sketch map on the mould circle of big chamfering rotary table.
Fig. 6 is the forging finished product sketch map of the embodiment of the invention 1.
Fig. 7 is the forging finished product sketch map of the embodiment of the invention 2.
The specific embodiment
Below in conjunction with accompanying drawing 1-7 and specific embodiments the present invention is described in further detail:
Embodiment 1
1.5MW the Forging Technology of wind power principal axis comprises step:
A, the steel ingot of selecting for use must be the steel ingot raw material that adopt electric furnace smelting+LF (external refining)+VD (vacuum degassing) smelting process to smelt.Selecting material for use is 34CrNiMo6, meets DIN EN 10083-3, guarantees S ≦ 0.15%, P ≦ 0.20%, wherein [H] ≦ 2.0ppm; [O] ≦ 25ppm.To the raw material steel ingot, steel mill carries out hot steel ingot heat by " steel ingot heat fortune rules " and send.
B; According to Fig. 2, adopt steel mill heat to send and transport the hot steel ingot of next surface temperature greater than 400 ° of C, its heating process is: insulation is more than 3 hours under 700 ° of C～750 ° C furnace temperature; Be warmed up to 1240 ± 10 ° of C by the heating furnace peak power again, insulation is more than 10 hours;
C, according to Fig. 4, the first fiery ejection blocking base.Steel ingot in the stove is taken out, and flat anvil is to steel ingot rising head end bar hold, 650*600mm about using; Then jaw is put into jumping-up drain cap hole; Adopt the powerful jumping-up of press upper flat plate, to H900mm, this moment, the jumping-up forging ratio was 2.2 with the effective ingot height of steel ingot degree H2140mm jumping-up.Take out forging stock, manipulator clamping vice jaw part adopts then and goes up the press flat board; Lower platform adopts big plane cross to suppress the jumping-up forging method, and forging is is radially directly forged and pressed the diameter base size H1150mm to wind power principal axis flange end material; The forging half-twist; Continue to forge and press the diameter base size H1150mm to wind power principal axis flange end material with big plane upsetting, suppress jumping-up through this big plane cross of twice and forge, the forging ratio of forging increases to 4.6.Continue to use plane, lower platform then, WHF forging method (wide anvil brute force is depressed forging method), forging is depressed into #1150*1500mm from all directions.Adopt flat anvil up and down this moment, to forging stock number seal, sub-material, the flange end forging ' s block dimension is that all directions #1150*540mm and axle body section forging ' s block dimension #1150*960mm. are round as a ball to 1150 to the flange end material, the axle body section expects the pin pulling to 750, earnestly jaw.Advance stove and be heated to 1220 ° of C ± 10 ° C, insulation is more than 3 hours.
D, according to Fig. 5, the second fiery finish forging.Become the forging of T type to blocking, hang in hollow rotary table with driving.Suppress jumping-up to H350mm with the press upper mounting plate, adopting upward then, flat anvil rotates forging and pressing, smooth flange end to H280mm to the flange end material.In mould, take out forging stock, manipulator clamping wind-powered electricity generation axle small end, flat anvil in the employing, the lower platform forging method carries out round as a ball, smooth to the flange end external diameter, become forging ' s block dimension 1540*280mm.Manipulator clamping flange end adopts flat anvil up and down then, and axle body is forged into forging ' s block dimension, accomplishes and forges.
E is cooled to about 550 ° of C the workpiece air cooling, advances stove insulation, only need carry out the positive tempering that is recrystallized of a hot charging stove.
According to Fig. 3, a described hot charging stove positive tempering heat treatment that is recrystallized; The workpiece stove is cooled to 550 ° of C ± 20 ° C outward, advanced stove insulation 3-4 hour, heat temperature raising to 930 ± 10 ° C again, per hour the temperature recruitment is less than 80 ℃/hour; Be incubated 12 hours, come out of the stove then, evenly force blast-cold, make the forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C with air blast; Advance the stove insulation again, temperature retention time is no less than 6 hours, then heat temperature raising to 650 ± 10 ° C; In the temperature-rise period, per hour the temperature recruitment less than 80 ° C/ hour, be incubated 15 hours; With the stove cooling, control forging per hour temperature drop treats that smaller or equal to 40 ° of C forging drops to about 400 ° of C again; Continue control forging cooling rate less than 20 ° C/ hour, when the forging stove is chilled to 150 ° below the C, the forging cooling of can coming out of the stove.Whole heat treatment cycle curve can adopt the online drafting temperature curve of moisture recorder.
F carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light.
G, carry out modified, mechanical performance, metallographic, hardness detects, nondestructive inspection, finish turning, packing.
Forging trimmed size of the present invention is as shown in Figure 6.
Embodiment 2
The forging method of 2MW wind power principal axis comprises step:
A, the steel ingot of selecting for use must be the steel ingot raw material that adopt electric furnace smelting+LF (external refining)+VD (vacuum degassing) smelting process to smelt.Selecting material for use is 42CrMo4, according to the requirement of standard SEW550-1976, and 0.40%≤C≤0.45%, Si≤0.40%; 0.60%≤Mn≤0.80%, S ≦ 0.15%, P ≦ 0.20%, 1.00%≤Cr≤1.20%; 0.45%≤Ni≤0.60%, 0.18%≤Mo≤0.30%, wherein [H] ≦ 2.0ppm; [O] ≦ 25ppm.
B according to Fig. 1, will adopt cold steel ingot heating process for cold steel ingot: surface temperature is encased in the hot stove that the highest shove charge furnace temperature is lower than 400 ° of C less than the steel ingot of 400 ° of C; Insulation is more than 4 hours under charging temperature; Be heated to 850 ± 10 ° of C then, per hour the temperature recruitment is incubated more than 6 hours less than 60 ° of C again; Be warming up to 1240 ± 10 ° of C by the heating furnace peak power again, insulation is more than 10 hours.
C, the first fiery ejection blocking base.Steel ingot in the stove is taken out, and flat anvil is to steel ingot rising head end bar hold, 650*600mm about using; Then jaw is put into jumping-up drain cap hole; Adopt the powerful jumping-up of press upper flat plate, to H1000mm, this moment, the jumping-up forging ratio was 2.4 with the effective ingot height of steel ingot degree H2380mm jumping-up.Take out forging stock, manipulator clamping vice jaw part adopts then and goes up the press flat board; Lower platform adopts big plane cross to suppress the jumping-up forging method, and forging is is radially directly forged and pressed the diameter base size H1200mm to wind power principal axis flange end material; The forging half-twist; Continue to forge and press the diameter base size H1200mm to wind power principal axis flange end material with big plane upsetting, suppress jumping-up through this big plane cross of twice and forge, the forging ratio of forging increases to 4.9.Continue to use plane, lower platform then, WHF forging method (wide anvil brute force is depressed forging method), forging is depressed into #1200*1750mm from all directions.Adopt flat anvil up and down then, to forging stock number seal, sub-material, the flange end forging ' s block dimension is that #1200*580mm and axle body section forging ' s block dimension #1200*1170mm. are round as a ball to 1200 to the flange end material, the axle body section expects the pin pulling to 900, earnestly jaw.Advance stove and be heated to 1220 ° of C ± 10 ° C, insulation is more than 3 hours.
D, the second fiery finish forging.Become the forging of T type to blocking, hang in hollow rotary table with driving.Suppress jumping-up to H380mm with the press upper mounting plate, adopting upward then, flat anvil rotates forging and pressing, smooth flange end to H250mm to the flange end material.In mould, take out forging stock, manipulator clamping wind-powered electricity generation axle small end, flat anvil in the employing, the lower platform forging method carries out round as a ball, smooth to the flange end external diameter, become forging ' s block dimension 1730*250mm.Manipulator clamping flange end adopts flat anvil up and down then, and axle body is forged into forging ' s block dimension, accomplishes and forges.
E is cooled to about 550 ° of C the workpiece air cooling, advances stove insulation, only need carry out the positive tempering that is recrystallized of a hot charging stove.
According to Fig. 3, a described hot charging stove positive tempering heat treatment that is recrystallized; The workpiece stove is cooled to 550 ° of C ± 20 ° C outward, advanced stove insulation 3-4 hour, heat temperature raising to 930 ± 10 ° C again, per hour the temperature recruitment is less than 80 ℃/hour; Be incubated 12 hours, come out of the stove then, evenly force blast-cold, make the forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C with air blast; Advance the stove insulation again, temperature retention time is no less than 6 hours, then heat temperature raising to 650 ± 10 ° C; In the temperature-rise period, per hour the temperature recruitment less than 80 ° C/ hour, be incubated 15 hours; With the stove cooling, control forging per hour temperature drop treats that smaller or equal to 40 ° of C forging drops to about 400 ° of C again; Continue control forging cooling rate less than 20 ° C/ hour, when the forging stove is chilled to 150 ° below the C, the forging cooling of can coming out of the stove.Whole heat treatment cycle curve can adopt the online drafting temperature curve of moisture recorder.
F carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light.
G, carry out modified, mechanical performance, metallographic, hardness detects, nondestructive inspection, finish turning, packing.
Forging trimmed size of the present invention is as shown in Figure 7.
The invention of this reality provides a kind of forging method of wind power principal axis; Concrete application approach is a lot, and the above only is a preferred implementation of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement, these improvement also should be regarded as protection scope of the present invention.
Claims (4)
1. wind power principal axis forging method is characterized in that following steps are arranged:
Step a, the steel ingot that adopts electric furnace smelting+external refining+vacuum degassing smelting is as raw material;
Step b advances stove with steel ingot and is heated to 1240 ± 10 ° of C of initial forging temperature, and insulation is more than 10 hours;
Step c, the first fiery ejection blocking base:
Steel ingot in the stove is taken out, and flat anvil is put into jumping-up drain cap hole with jaw then to steel ingot rising head end bar hold about using, and adopts the powerful jumping-up of press upper flat plate; This moment, steel ingot jumping-up forging ratio was 2.2 ± 0.2, took out forging stock, and manipulator clamping jaw adopts then and goes up the press plane; Lower platform adopts big plane cross to suppress the jumping-up forging method, radially directly adopts big up and down plane to suppress the diameter base size of jumping-up to wind power principal axis flange end material, forging stock half-twist to forging stock; Continue to suppress jumping-up with big plane up and down and forge and press the diameter base size to wind power principal axis flange end material, this moment, the solid forging of forging stock increased to 4.5～5 than, continued to use plane, lower platform then; Wide anvil brute force is depressed forging method, and to from all directions, diameter dimension is the diameter base size of wind power principal axis flange end material with the blank forging and pressing; Adopt upper and lower flat anvil then,, divide flange end material length and axle body end material long forging stock number seal; The flange end material is carried out round as a ball, axle body end material goes out pin and pulls out the base size to spindle rod portion, and this bar portion diameter dimension needs less than circular rotary table patrix circle internal diameter 20～30mm; Earnestly otch advances stove and is heated to 1220 ° of C ± 10 ° C, and insulation is more than 3 hours;
Steps d, the second fiery finish forging:
Become the forging of T type to blocking, hang in hollow rotary table, adopt the maximum forging pressure of press directly the flange end material to be suppressed jumping-up with the press upper mounting plate with driving; Adopt last flat anvil that the flange end material is rotated then and forge and press to the forging ' s block dimension height, smooth; Take out forging stock, manipulator clamping wind-powered electricity generation axle small end, flat anvil in the employing, the lower platform forging method carries out round as a ball, smooth to the flange end external diameter; Manipulator clamping flange end adopts flat anvil up and down then, and forging ' s block dimension is arrived in the axle body forging; Accomplish and forge;
Step e, air cooling carries out a hot charging stove positive tempering heat treatment that is recrystallized to workpiece;
Step f carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light;
Step g, modified, mechanical performance, metallographic, hardness detects, nondestructive inspection, finish turning, packing.
2. the wind power principal axis forging method of telling according to claim 1 is characterized in that: the steel ingot heating means of described step b are divided into hot steel ingot processing technology and cold steel ingot heating process, and detailed process is:
1) hot steel ingot heating process: the surface temperature for steel plant's heat is sent is regarded as hot steel ingot greater than the steel ingot of 400 ° of C; Its heating process is: insulation is more than 3 hours under 700 ° of C～750 ° C furnace temperature; Be warming up to initial forging temperature by the heating furnace peak power again, insulation;
2) cold steel ingot heating process: regard as cold steel ingot less than the steel ingot of 400 ° of C for surface temperature; Its heating process is: be encased in the hot stove that the highest shove charge furnace temperature is lower than 400 ° of C earlier, insulation is heated to 850 ± 10 ° of C more than 4 hours then under charging temperature; Per hour the temperature recruitment is less than 60 ° of C; Be incubated again more than 6 hours, be warming up to initial forging temperature by the heating furnace peak power again, insulation;
The wind power principal axis forging method of telling according to claim 1; It is characterized in that: the jumping-up forging method suppressed in the big plane cross among the described step c; The ratio of height to diameter (H/D) of forging is less than 1 at this moment; So that the σ r of forging heart portion and σ θ are converted into compression by tension, make forging heart portion be in the three-dimensional compressive stress state.
3. the wind power principal axis forging method of telling according to claim 1; It is characterized in that: the hollow rotary table in the said steps d; The center of turntable is hollow; Said turntable is hollow turntable base by the bottom, and top is made up of the identical packing ring of interior external diameter and the mould circle at top, and the chamfering R value of this mould circle needs the chamfering R value greater than the wind power principal axis flange end.
4. the high-efficiency and energy-saving type wind-powered electricity generation machine main shaft forging method of telling according to claim 1 is characterized in that: the be recrystallized detailed process of positive tempering of hot charging stove is among the said step e: the workpiece stove is cooled to 550 ° of C ± 20 ° C outward, advances stove insulation 3-4 hour; Heat temperature raising to 930 ± 10 ° C again, per hour the temperature recruitment is incubated 12 hours less than 80 ℃/hour; Come out of the stove then, evenly force blast-cold, make the forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C with air blast; Advance the stove insulation again, temperature retention time is no less than 6 hours, then heat temperature raising to 650 ± 10 ° C; In the temperature-rise period, per hour the temperature recruitment less than 80 ° C/ hour, be incubated 15 hours; With the stove cooling, control forging per hour temperature drop treats that smaller or equal to 40 ° of C forging drops to about 400 ° of C again; Continue control forging cooling rate less than 20 ° C/ hour, when the forging stove is chilled to 150 ° below the C, the forging cooling of can coming out of the stove.
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| CN108160906A (en) * | 2017-12-26 | 2018-06-15 | 通裕重工股份有限公司 | A kind of forging method for reducing initial forging temperature, preventing forged shaft coarse grains |
| CN109226617A (en) * | 2018-08-24 | 2019-01-18 | 江阴南工锻造有限公司 | A kind of high-power wind turbine main shaft large flange quick shaping process |
| CN109226618A (en) * | 2018-08-24 | 2019-01-18 | 江阴南工锻造有限公司 | Mold is used in the compound Forging Technology of high-power wind turbine main shaft and forging and stamping |
| CN109746360A (en) * | 2018-12-28 | 2019-05-14 | 江苏海宇机械有限公司 | A kind of manufacturing method improving forging part dimensional accuracy |
| CN110722079A (en) * | 2019-10-17 | 2020-01-24 | 浙江众通汽车零部件有限公司 | Preparation process of vertical forged shaft forging |
| CN111250640A (en) * | 2020-02-29 | 2020-06-09 | 河南中原特钢装备制造有限公司 | Hot working method of large-diameter refined hot work die steel forging |
| CN111468668A (en) * | 2020-05-11 | 2020-07-31 | 张家港广大特材股份有限公司 | Wind power main shaft forging process |
| CN112719173A (en) * | 2020-12-18 | 2021-04-30 | 陕西宏远航空锻造有限责任公司 | Forging method of 15-5PH disc shaft integrated forging |
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| CN113523175A (en) * | 2021-06-24 | 2021-10-22 | 河南中原特钢装备制造有限公司 | Heating process for preheating cold ingot by using waste heat of heating furnace |
| CN114147159A (en) * | 2021-12-20 | 2022-03-08 | 江阴市龙玉锻压有限公司 | Forging process for improving overall mechanical property of large-scale flat head forging |
| CN114525395A (en) * | 2022-02-28 | 2022-05-24 | 通裕重工股份有限公司 | Post-forging heat treatment process for wind power hollow main shaft |
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| CN104175062A (en) * | 2013-05-28 | 2014-12-03 | 陕西华威锻压有限公司 | All-fiber-texture large-size double-flange fan main shaft forging method |
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| CN103691860B (en) * | 2013-12-06 | 2015-10-07 | 天津重型装备工程研究有限公司 | The processing method of effective raising Quality of Large Forgings |
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| CN107779589A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | A kind of inexpensive Heating Steel Ingots technique |
| CN108160906A (en) * | 2017-12-26 | 2018-06-15 | 通裕重工股份有限公司 | A kind of forging method for reducing initial forging temperature, preventing forged shaft coarse grains |
| CN108160906B (en) * | 2017-12-26 | 2019-08-23 | 通裕重工股份有限公司 | A kind of forging method for reducing initial forging temperature, preventing forged shaft coarse grains |
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| CN109746360A (en) * | 2018-12-28 | 2019-05-14 | 江苏海宇机械有限公司 | A kind of manufacturing method improving forging part dimensional accuracy |
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| CN114147159A (en) * | 2021-12-20 | 2022-03-08 | 江阴市龙玉锻压有限公司 | Forging process for improving overall mechanical property of large-scale flat head forging |
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