CN102989982B - Forging method of driving shaft for gearbox - Google Patents
Forging method of driving shaft for gearbox Download PDFInfo
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- CN102989982B CN102989982B CN201210299983.4A CN201210299983A CN102989982B CN 102989982 B CN102989982 B CN 102989982B CN 201210299983 A CN201210299983 A CN 201210299983A CN 102989982 B CN102989982 B CN 102989982B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005242 forging Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000010008 shearing Methods 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000010791 quenching Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 7
- 238000005422 blasting Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 abstract 3
- 238000005520 cutting process Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000003303 reheating Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
The invention discloses a forging method of a driving shaft for a gearbox. The forging method of the driving shaft for the gearbox comprises the following steps: a step a of pouring a cylindrical blank material, wherein the cylindrical blank material comprises chemical components, by weight percent: no smaller than 0.096% but no greater than 0.150% of C, no smaller than 2.1% but no greater than 2.40% of Si, no smaller than 1.1% but no greater than 1.30% of Mn, no smaller than trace amountbut no greater than 0.033% of P, no smaller than trace amount but no greater than 0.0260% of S, 0.11-0.22% of Ni, no smaller than 8.50% but no greater than 11.50% of Cr, no smaller than trace amount but no greater than 0.018% of B, and the balance of Fe and inevitable included impurities; and the step a comprises the following steps: decreasing the temperature of blank bodies shaped in a pouring way to 350 DEG C, then heating the blank bodies to 670 to 760 DEG C for 3-5h heat preservation, cooling the blank bodies in a furnace to 300 DEG C for 4h heat preservation, reheating the blank bodies to 650 to 760 DEG C for 17h heat preservation, cooling the blank bodies to 400 DEG C at a speed of 50 DEG C per hour and finally cooling the blank bodies to 140 DEG C at a speed of 20 DEG C per hour; and a step b of forging, wherein the step b comprises the following steps: a step 1 of selectively using 30-diameter round steel and cutting by using a shearing machine, wherein the length of a sheared rough blank piece is 70.3mm; and a step 2 of putting the rough blank piece of the step 1 in an intermediate frequency heating furnace for heating at a heating temperature of 1120 to 1180 DEG C and keeping the heating for 3.6min. The forging method of the driving shaft for the gearbox is beneficial to the large-batch industrial production of the driving shaft for the gearbox; and moreover, the phenomena of dirt inclusion and impossible fullness occurring during the forging process are reduced, the mechanical performance of a product is further improved, the product material is saved and the service life of a die for the product is prolonged.
Description
Technical field
The present invention relates to a kind of forging method of gearbox driving shaft.
Background technology
Driving shaft is the vital part on automobile, due to the particularity of its shape and the importance of serviceability thereof, thus adds the difficulty of its forging molding, and the distribution of material and the selection of technique all need careful consideration.For this reason, the reasonable forging method of this forging is developed also quite by paying close attention to both at home and abroad.
At present, the technological process of domestic driving shaft routine is: heating, blocking, finish-forging, finishing.The shortcoming of the program is: need large tonnage pressing machine, and energy consumption is large, stock utilization is low, causes forging cost high.The forging produced with the technological process of the program easily occurs that folder is dirty, is not fully filled, and defect percent defective reaches 5%, and raw material availability only has 20-30%, and due to reasons such as overlap are excessive, the life-span of mould is also only about 5000-6000 part.
Summary of the invention
The object of this invention is to provide a kind of forging method of gearbox driving shaft, make it be beneficial to large batch of industrialized production, and decrease in forging process the phenomenon occurring that folder is dirty, be not fully filled, the mechanical property of product is improved further, save product materials, improve the die life of product.
Technical scheme of the present invention is as follows:
A forging method for gearbox driving shaft, comprises the following steps:
A, cast cylinder blank step
In steel ingot, chemical component weight percentage is: 0.096%≤C≤0.150%, 2.1%≤Si≤2.40%, 1.1%≤Mn≤1.30%, trace≤P≤0.033%, trace≤S≤0.0260%, Ni 0.11-0.22%, 8.50%≤Cr≤11.50%, trace≤B≤0.0018%, surplus is iron and inevitable impurity; The steel ingot temperature of moulding by casting is down to 350 DEG C, then is heated to 670-760 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, is incubated 3 hours, then is heated to 650-760 DEG C, is incubated 10 hours, is cooled to 400 DEG C with 34 DEG C/h, then with 20 DEG C/h, be cooled to 180 DEG C;
B, forging step
1, select diameter to be 70 round steel, utilize cutter to carry out blanking, blank length 270.3mm after shearing;
2, the blank of step 1 is put into intermediate-frequency heating furnace heating, heating-up temperature 1120-1180 DEG C, keep heat time 3.6min;
3, blank is put into punch press and carry out jumping-up, jumping-up thickness 40 ± 1mm;
4, the blank behind pressure side is put on mould that the press that rubs installs, utilize mould forge hot blank; Temperature 900 DEG C, pressure 400T;
5, by the blank after forge hot, put into punch press and carry out trimming, the process of hot school;
C, heat treatment
The driving shaft of forging molding is placed in the glowing furnace of the first design temperature, first design temperature is 800 DEG C-900 DEG C, keep quenching in-furnace temperature to implement quenching to jackshaft, temperature retention time scope is 2.2-2.8 hour, and being come out of the stove by the jackshaft after Quench heating is cooled to temperature≤150 DEG C;
Cooled driving shaft is placed in the tempering furnace of the second design temperature, the second design temperature is 560 DEG C-650 DEG C, and keep tempering in-furnace temperature to implement tempering to jackshaft, temperature retention time scope is 3.2-4.5 hour, cooling of being come out of the stove by the jackshaft after tempering heating;
After temper, again the head of driving shaft is heated to 320-380 DEG C, insulation 4-5 hour, then misting cooling process, the afterbody of driving shaft, at 900-1020 DEG C, is incubated 6-8 hour, then air cooling, heating to temperature in the middle part of last driving shaft is again 160 ~ 190 DEG C, and insulation 2-3 hour, puts into iron case cooling in heap;
D, phosphorating treatment, be 280-300 DEG C by driving shaft at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1-2min of 8, after dripping empty 1-2min, adopt bonderite process 15-20min, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, hot water driving shaft being placed in 78-100 DEG C processes 0.5-1min;
E, by the driving shaft Shot Blasting after heat treatment;
F, by the piece packaging of Shot Blasting.
The head of described driving shaft is heated to 350 DEG C, is incubated 4.5 hours, then misting cooling process, the afterbody of driving shaft, at 990 DEG C, is incubated 7 hours, then air cooling, heating to temperature in the middle part of last driving shaft is again 170 DEG C, is incubated 2.5 hours, puts into iron case cooling in heap.
The present invention makes it be beneficial to large batch of industrialized production, and decreases in forging process the phenomenon occurring that folder is dirty, be not fully filled, and the mechanical property of product is improved further, has saved product materials, improves the die life of product.
Mechanics properties testing data of the present invention are as follows:
Tensile strength >=854 Mpa
Yield strength >=661Mpa
Percentage elongation >=16%
The contraction percentage of area >=35%
Brinell hardness HB=211-229.
Detailed description of the invention
A forging method for gearbox driving shaft, comprises the following steps:
A, cast cylinder blank step
In steel ingot, chemical component weight percentage is: 0.096%≤C≤0.150%, 2.1%≤Si≤2.40%, 1.1%≤Mn≤1.30%, trace≤P≤0.033%, trace≤S≤0.0260%, Ni 0.11-0.22%, 8.50%≤Cr≤11.50%, trace≤B≤0.0018%, surplus is iron and inevitable impurity; The steel ingot temperature of moulding by casting is down to 350 DEG C, then is heated to 670-760 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, is incubated 3 hours, then is heated to 650-760 DEG C, is incubated 10 hours, is cooled to 400 DEG C with 34 DEG C/h, then with 20 DEG C/h, be cooled to 180 DEG C;
B, forging step
1, select diameter to be 70 round steel, utilize cutter to carry out blanking, blank length 270.3mm after shearing;
2, the blank of step 1 is put into intermediate-frequency heating furnace heating, heating-up temperature 1120-1180 DEG C, keep heat time 3.6min;
3, blank is put into punch press and carry out jumping-up, jumping-up thickness 40 ± 1mm;
4, the blank behind pressure side is put on mould that the press that rubs installs, utilize mould forge hot blank; Temperature 900 DEG C, pressure 400T;
5, by the blank after forge hot, put into punch press and carry out trimming, the process of hot school;
C, heat treatment
The driving shaft of forging molding is placed in the glowing furnace of the first design temperature, first design temperature is 800 DEG C-900 DEG C, keep quenching in-furnace temperature to implement quenching to jackshaft, temperature retention time scope is 2.2-2.8 hour, and being come out of the stove by the jackshaft after Quench heating is cooled to temperature≤150 DEG C;
Cooled driving shaft is placed in the tempering furnace of the second design temperature, the second design temperature is 560 DEG C-650 DEG C, and keep tempering in-furnace temperature to implement tempering to jackshaft, temperature retention time scope is 3.2-4.5 hour, cooling of being come out of the stove by the jackshaft after tempering heating;
After temper, again the head of driving shaft is heated to 320-380 DEG C, insulation 4-5 hour, then misting cooling process, the afterbody of driving shaft, at 900-1020 DEG C, is incubated 6-8 hour, then air cooling, heating to temperature in the middle part of last driving shaft is again 160 ~ 190 DEG C, and insulation 2-3 hour, puts into iron case cooling in heap;
D, phosphorating treatment, be 280-300 DEG C by driving shaft at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1-2min of 8, after dripping empty 1-2min, adopt bonderite process 15-20min, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, hot water driving shaft being placed in 78-100 DEG C processes 0.5-1min;
E, by the driving shaft Shot Blasting after heat treatment;
F, by the piece packaging of Shot Blasting.
The head of described driving shaft is heated to 350 DEG C, is incubated 4.5 hours, then misting cooling process, the afterbody of driving shaft, at 990 DEG C, is incubated 7 hours, then air cooling, heating to temperature in the middle part of last driving shaft is again 170 DEG C, is incubated 2.5 hours, puts into iron case cooling in heap.
Claims (2)
1. a forging method for gearbox driving shaft, is characterized in that, comprises the following steps:
A, cast cylinder blank step
In steel ingot, chemical component weight percentage is: 0.096%≤C≤0.150%, 2.1%≤Si≤2.40%, 1.1%≤Mn≤1.30%, trace≤P≤0.033%, trace≤S≤0.0260%, Ni 0.11-0.22%, 8.50%≤Cr≤11.50%, trace≤B≤0.0018%, surplus is iron and inevitable impurity; The steel ingot temperature of moulding by casting is down to 350 DEG C, then is heated to 670-760 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, is incubated 3 hours, then is heated to 650-760 DEG C, is incubated 10 hours, is cooled to 400 DEG C with 34 DEG C/h, then with 20 DEG C/h, be cooled to 180 DEG C;
B, forging step
(1) select diameter to be 70mm cylinder blank, utilize cutter to carry out blanking, blank length 270.3mm after shearing;
(2) blank of step (1) is put into intermediate-frequency heating furnace heating, heating-up temperature 1120-1180 DEG C, keep heat time 3.6min;
(3) blank is put into punch press and carry out jumping-up, jumping-up thickness 40 ± 1mm;
(4) blank behind pressure side is put on mould that the press that rubs installs, utilize mould forge hot blank; Temperature 900 DEG C, pressure 400T;
(5) by the blank after forge hot, put into punch press and carry out trimming, the process of hot school;
C, heat treatment
The driving shaft of forging molding is placed in the glowing furnace of the first design temperature, first design temperature is 800 DEG C-900 DEG C, keep quenching in-furnace temperature to implement quenching to driving shaft, temperature retention time scope is 2.2-2.8 hour, and being come out of the stove by the driving shaft after Quench heating is cooled to temperature≤150 DEG C;
Cooled driving shaft is placed in the tempering furnace of the second design temperature, the second design temperature is 560 DEG C-650 DEG C, and keep tempering in-furnace temperature to implement tempering to driving shaft, temperature retention time scope is 3.2-4.5 hour, cooling of being come out of the stove by the driving shaft after tempering heating;
After temper, again the head of driving shaft is heated to 320-380 DEG C, insulation 4-5 hour, then misting cooling process, the afterbody of driving shaft, at 900-1020 DEG C, is incubated 6-8 hour, then air cooling, heating to temperature in the middle part of last driving shaft is again 160 ~ 190 DEG C, and insulation 2-3 hour, puts into iron case cooling in heap;
D, phosphorating treatment, be 280-300 DEG C by driving shaft at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1-2min of 8, after dripping empty 1-2min, adopt bonderite process 15-20min, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, hot water driving shaft being placed in 78-100 DEG C processes 0.5-1min;
E, by the driving shaft Shot Blasting after heat treatment;
F, the driving shaft of Shot Blasting to be packed.
2. the forging method of gearbox driving shaft according to claim 1, it is characterized in that, the head of described driving shaft is heated to 350 DEG C, is incubated 4.5 hours, then misting cooling process, the afterbody of driving shaft is at 990 DEG C, be incubated 7 hours, then air cooling, heat again in the middle part of last driving shaft to temperature be 170 DEG C, be incubated 2.5 hours, put into iron case cooling in heap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299983.4A CN102989982B (en) | 2012-08-22 | 2012-08-22 | Forging method of driving shaft for gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299983.4A CN102989982B (en) | 2012-08-22 | 2012-08-22 | Forging method of driving shaft for gearbox |
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| CN102989982A CN102989982A (en) | 2013-03-27 |
| CN102989982B true CN102989982B (en) | 2015-06-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846633A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Method of forging idler shaft for gearbox |
| CN103846625A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Method for manufacturing roller wheels of crawler excavator |
| CN104858345B (en) * | 2015-06-03 | 2017-06-20 | 杭州前进锻造有限公司 | A kind of die forging method of gearbox output shaft |
| CN111408681B (en) * | 2020-04-13 | 2022-04-12 | 南宫市精强连杆有限公司 | Method for tempering non-quenched and tempered steel connecting rod of engine by using waste heat after forging |
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| JP2001254143A (en) * | 2000-03-10 | 2001-09-18 | Isuzu Motors Ltd | Soft-nitriding non-thermally refined crank shaft and its producing method |
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| EP1770184A1 (en) * | 2005-09-29 | 2007-04-04 | Hitachi, Ltd. | High-strength martensite heat resisting cast steel and method of producing the steel |
| CN101456060A (en) * | 2008-10-30 | 2009-06-17 | 安徽凯宇机械制造有限公司 | Forging device pipeline of complicated forging piece and forging production technique thereof |
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| CN101602157A (en) * | 2009-06-24 | 2009-12-16 | 刘惠 | A kind of production technology of speed reducer output shaft |
| CN101618508A (en) * | 2009-07-30 | 2010-01-06 | 扬州东升汽车零部件制造有限公司 | Method for producing vehicle-used stabilizer bar with high corrosion resistance |
| CN101722406A (en) * | 2009-12-31 | 2010-06-09 | 上海新闵重型锻造有限公司 | Method for manufacturing pin shaft through forging |
| CN101864514A (en) * | 2010-06-28 | 2010-10-20 | 长春轨道客车装备有限责任公司 | EA1T steel axle heat treatment method |
-
2012
- 2012-08-22 CN CN201210299983.4A patent/CN102989982B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001254143A (en) * | 2000-03-10 | 2001-09-18 | Isuzu Motors Ltd | Soft-nitriding non-thermally refined crank shaft and its producing method |
| KR20060086208A (en) * | 2005-01-26 | 2006-07-31 | 엘지전자 주식회사 | A manufacturing process of crank shaft for a rotary compressor |
| EP1770184A1 (en) * | 2005-09-29 | 2007-04-04 | Hitachi, Ltd. | High-strength martensite heat resisting cast steel and method of producing the steel |
| CN101456060A (en) * | 2008-10-30 | 2009-06-17 | 安徽凯宇机械制造有限公司 | Forging device pipeline of complicated forging piece and forging production technique thereof |
| CN101508004A (en) * | 2009-03-20 | 2009-08-19 | 华中科技大学 | Sedan gear-box axle piece cold finish-forging formation method and die |
| CN101602157A (en) * | 2009-06-24 | 2009-12-16 | 刘惠 | A kind of production technology of speed reducer output shaft |
| CN101618508A (en) * | 2009-07-30 | 2010-01-06 | 扬州东升汽车零部件制造有限公司 | Method for producing vehicle-used stabilizer bar with high corrosion resistance |
| CN101722406A (en) * | 2009-12-31 | 2010-06-09 | 上海新闵重型锻造有限公司 | Method for manufacturing pin shaft through forging |
| CN101864514A (en) * | 2010-06-28 | 2010-10-20 | 长春轨道客车装备有限责任公司 | EA1T steel axle heat treatment method |
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Denomination of invention: A forging method of driving shaft for gearbox Effective date of registration: 20220331 Granted publication date: 20150617 Pledgee: Industrial and Commercial Bank of China Limited Qingyang sub branch Pledgor: CHANGLI FORGING Co.,Ltd. Registration number: Y2022980003405 |
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