CN102990292A - Processing method of shift fork shaft - Google Patents
Processing method of shift fork shaft Download PDFInfo
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- CN102990292A CN102990292A CN2012103000199A CN201210300019A CN102990292A CN 102990292 A CN102990292 A CN 102990292A CN 2012103000199 A CN2012103000199 A CN 2012103000199A CN 201210300019 A CN201210300019 A CN 201210300019A CN 102990292 A CN102990292 A CN 102990292A
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- shift shaft
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- declutch shift
- steel ingot
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Abstract
The invention discloses a processing method of a shift fork shaft. The processing method of the shift fork shaft comprises the following steps: no smaller than 1.2% but no greater than 1.30% of Mn, no smaller than trace amount but no greater than 0.030% of P, no smaller than trace amount but no greater than 0.030% of S, no smaller than 11.50% but no greater than 13.50% of Cr, no smaller than trace amount but no greater than 0.0018% of B, and the balance of Fe and inevitable included impurities; and the step a comprises the following steps: decreasing the temperature of the steel ingot shaped in a pouring way to 350 DEG C, then heating the steel ingot to 670 to 760 DEG C for 3-5h heat preservation, cooling the steel ingot in a furnace to 300 DEG C for 4h heat preservation, reheating the steel ingot to 650 to 760 DEG C for 17h heat preservation, cooling the steel ingot to 400 DEG C at a speed of 50 DEG C per hour and finally cooling the steel ingot 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 heating a round bar material to 1200 to 1250 DEG C, upsetting the round bar material on a horizontal forging machine through a die dimension form cavity for the preparation of a blank, controlling the time of an upsetting blank-preparation technology and keeping the temperature of an intermediate blank of the shift fork shaft in the range of 1100 to 1200 DEG C. The processing method of the shift fork shaft is beneficial to the large-batch industrial production of the shift fork shaft; 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 processing method of declutch shift shaft.
Background technology
Declutch shift shaft is the direct actuator of vehicle wheel rotation, is a strength member of automobile transmitting torque.During motor racing, the moment of torsion of engine output, pass to declutch shift shaft through multi-change speed, be delivered on the wheel by declutch shift shaft again, propelling vehicle advances or pours into, therefore, declutch shift shaft when work have withstand shocks, the effect of alternating bending fatigue load and torsion, so just require declutch shift shaft to have enough iron bending strengths, shearing strength and toughness preferably.
At present, utilize the pendulum mill to produce the declutch shift shaft casting technique and mostly be the secondary ignition technique, the declutch shift shaft blank heats rear with equipment bases such as open die forging or hydraulic presses for the first time, the base time is longer, workpiece rapid heat dissipation during base, cause the temperature after blank heats for the first time to be down to about 600 ℃ through heat radiation, blank plasticity reduces, can not satisfy pendulum and grind technological requirement, therefore need to carry out second time and heat adding for the first time half-shaft blank after the thermal deformation, can not satisfy pendulum and grind technological requirement, because need to carry out second time and heat adding for the first time half-shaft blank after the thermal deformation.This technique exists the problems such as forging oxide skin is large, and forging surface quality is poor, and production cost is high, and production efficiency is low.
Summary of the invention
The processing method that the purpose of this invention is to provide a kind of declutch shift shaft, make it be beneficial to large batch of industrialized production, and reduced the phenomenon that occurs the folder dirt in the forging process, is not fully filled, the mechanical property of product is further improved, save product materials, improved the die life of product.
Technical scheme of the present invention is as follows:
A kind of processing method of declutch shift shaft may further comprise the steps:
A, cast steel ingot
Chemical component weight percentage is in the steel ingot: 0.085%≤C≤0.150%, 1.3%≤Si≤1.40%, 1.2%≤Mn≤1.30%, trace≤P≤0.030%, trace≤S≤0.030%, 11.50%≤Cr≤13.50%, trace≤B≤0.0018%, surplus are iron and inevitable impurity; The steel ingot temperature of moulding by casting is down to 350 ℃, is heated to 670-760 ℃ again, is incubated 3-5 hour, and stove is chilled to 300 ℃, is incubated 4 hours, is heated to 650-760 ℃ again, is incubated 17 hours, is cooled to 400 ℃ with 50 ℃/hour, again with 20 ℃/hour, is cooled to 140 ℃;
B, forging step
1) circular bar is heated to 1200 ℃～1250 ℃, utilize mould dimension shape die cavity that described circular bar is carried out the jumping-up base at horizontal forging and upsetting machine again, the described jumping-up blank-making technology time is controlled, made the temperature of declutch shift shaft intermediate blank remain on 1100 ℃～1200 ℃;
2) above-mentioned declutch shift shaft intermediate blank directly is ground into type in the pendulum mill and obtains declutch shift shaft;
C, heat treatment
Declutch shift shaft after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-750 ℃ temperature range and is incubated 2h to not being higher than after 100 ℃, afterwards water-cooled; Through after the temper, head with declutch shift shaft is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of declutch shift shaft is incubated 6-8 hour at 900-1020 ℃, then air cooling, last declutch shift shaft middle part heat again to temperature be 160～180 ℃, be incubated 2-3 hour, put into iron case cooling in heap;
D, with the workpiece Shot Blasting after the heat treatment;
E, with the piece packaging of Shot Blasting.
Head through the declutch shift shaft after the Shot Blasting is heated to 350 ℃, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of declutch shift shaft is incubated 7 hours, then air cooling at 990 ℃, last declutch shift shaft middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
The present invention passes through technique scheme, overall structure is scientific and reasonable, during use, only need the declutch shift shaft with different model, according to length, owing to having the adaptability that to regulate different model, during production, only needing once spindle nose to be heated to technique temperature required, but just one-shot forming, thus, the traditional handicraft trouble that has reduced heating for multiple times and repeatedly forged, the corresponding energy consumption that reduced, having reduced material consumption and cost drops into, machining accuracy improves greatly, and compared with prior art stock utilization is brought up to more than 90% by present 65%, and power consumption reduces about 70%, recruitment reduces 3/4ths, a machine tool two people operate the malleable workpiece of split run more than 550, improve about 4 times of work efficiency, the good effect highly significant of generation.
It is as follows that mechanical property of the present invention detects data:
Tensile strength 〉=904 Mpa
Yield strength 〉=629 Mpa
Percentage elongation 〉=14%
The contraction percentage of area 〉=45%
Brinell hardness HB=227-249.
The specific embodiment
A kind of processing method of declutch shift shaft may further comprise the steps:
A, cast steel ingot
Chemical component weight percentage is in the steel ingot: 0.085%≤C≤0.150%, 1.3%≤Si≤1.40%, 1.2%≤Mn≤1.30%, trace≤P≤0.030%, trace≤S≤0.030%, 11.50%≤Cr≤13.50%, trace≤B≤0.0018%, surplus are iron and inevitable impurity; The steel ingot temperature of moulding by casting is down to 350 ℃, is heated to 670-760 ℃ again, is incubated 3-5 hour, and stove is chilled to 300 ℃, is incubated 4 hours, is heated to 650-760 ℃ again, is incubated 17 hours, is cooled to 400 ℃ with 50 ℃/hour, again with 20 ℃/hour, is cooled to 140 ℃;
B, forging step
1) circular bar is heated to 1200 ℃～1250 ℃, utilize mould dimension shape die cavity that described circular bar is carried out the jumping-up base at horizontal forging and upsetting machine again, the described jumping-up blank-making technology time is controlled, made the temperature of declutch shift shaft intermediate blank remain on 1100 ℃～1200 ℃;
2) above-mentioned declutch shift shaft intermediate blank directly is ground into type in the pendulum mill and obtains declutch shift shaft;
C, heat treatment
Declutch shift shaft after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-750 ℃ temperature range and is incubated 2h to not being higher than after 100 ℃, afterwards water-cooled; Through after the temper, head with declutch shift shaft is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of declutch shift shaft is incubated 6-8 hour at 900-1020 ℃, then air cooling, last declutch shift shaft middle part heat again to temperature be 160～180 ℃, be incubated 2-3 hour, put into iron case cooling in heap;
D, with the workpiece Shot Blasting after the heat treatment;
The head of the declutch shift shaft after e, the process Shot Blasting is heated to 350 ℃, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of declutch shift shaft is incubated 7 hours, then air cooling at 990 ℃, last declutch shift shaft middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap;
F, with the piece packaging of Shot Blasting.
Claims (2)
1. the processing method of a declutch shift shaft is characterized in that, may further comprise the steps:
A, cast steel ingot
Chemical component weight percentage is in the steel ingot: 0.085%≤C≤0.150%, 1.3%≤Si≤1.40%, 1.2%≤Mn≤1.30%, trace≤P≤0.030%, trace≤S≤0.030%, 11.50%≤Cr≤13.50%, trace≤B≤0.0018%, surplus are iron and inevitable impurity; The steel ingot temperature of moulding by casting is down to 350 ℃, is heated to 670-760 ℃ again, is incubated 3-5 hour, and stove is chilled to 300 ℃, is incubated 4 hours, is heated to 650-760 ℃ again, is incubated 17 hours, is cooled to 400 ℃ with 50 ℃/hour, again with 20 ℃/hour, is cooled to 140 ℃;
B, forging step
1) circular bar is heated to 1200 ℃～1250 ℃, utilize mould dimension shape die cavity that described circular bar is carried out the jumping-up base at horizontal forging and upsetting machine again, the described jumping-up blank-making technology time is controlled, made the temperature of declutch shift shaft intermediate blank remain on 1100 ℃～1200 ℃;
2) above-mentioned declutch shift shaft intermediate blank directly is ground into type in the pendulum mill and obtains declutch shift shaft;
C, heat treatment
Declutch shift shaft after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-750 ℃ temperature range and is incubated 2h to not being higher than after 100 ℃, afterwards water-cooled; Through after the temper, head with declutch shift shaft is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of declutch shift shaft is incubated 6-8 hour at 900-1020 ℃, then air cooling, last declutch shift shaft middle part heat again to temperature be 160～180 ℃, be incubated 2-3 hour, put into iron case cooling in heap;
D, with the workpiece Shot Blasting after the heat treatment;
E, with the piece packaging of Shot Blasting.
2. the processing method of described declutch shift shaft according to claim 1, it is characterized in that, head through the declutch shift shaft after the Shot Blasting is heated to 350 ℃, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of declutch shift shaft is at 990 ℃, be incubated 7 hours, air cooling then, last declutch shift shaft middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103000199A CN102990292A (en) | 2012-08-22 | 2012-08-22 | Processing method of shift fork shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103000199A CN102990292A (en) | 2012-08-22 | 2012-08-22 | Processing method of shift fork shaft |
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| CN102990292A true CN102990292A (en) | 2013-03-27 |
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| CN2012103000199A Pending CN102990292A (en) | 2012-08-22 | 2012-08-22 | Processing method of shift fork shaft |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436676A (en) * | 2013-08-22 | 2013-12-11 | 马钢(集团)控股有限公司 | Heat treatment method for improving structural homogenity of rolled steel integral wheel for large-size railway vehicle |
| CN104295736A (en) * | 2014-08-10 | 2015-01-21 | 江西国兴集团兴国齿轮箱拨叉有限公司 | Shift shaft for rear auxiliary box of heavy duty vehicle |
| CN105414424A (en) * | 2015-11-04 | 2016-03-23 | 合肥海源机械有限公司 | Forging method for forklift containing nichrome and fork tooth containing nichrome |
| CN105562572A (en) * | 2015-12-28 | 2016-05-11 | 合肥中澜新材料科技有限公司 | Forging method for shifting fork used for lathe |
| CN105880921A (en) * | 2014-09-28 | 2016-08-24 | 重庆硕睿机械有限公司 | Extrusion forming manufacturing technique for automobile steering column shaft fork integrate piece |
| CN106216960A (en) * | 2016-08-18 | 2016-12-14 | 池州学院 | A kind of processing method of selector fork |
| CN107489810A (en) * | 2017-09-13 | 2017-12-19 | 无锡市诚天诺执行器制造有限公司 | A kind of pneumatic actuator high intensity shifting fork device and preparation method thereof |
| CN108118386A (en) * | 2017-12-29 | 2018-06-05 | 重庆全茂合渝科技有限公司 | A kind of motorcycle fork axis electrolytic polishing process |
| CN108193122A (en) * | 2017-12-29 | 2018-06-22 | 重庆全茂合渝科技有限公司 | A kind of processing technology of corrosion-resistant shift fork axle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2011120328A1 (en) * | 2010-03-30 | 2011-10-06 | Cao Lixin | Vertical forging method for integral type steering yoke of automobile |
-
2012
- 2012-08-22 CN CN2012103000199A patent/CN102990292A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2011120328A1 (en) * | 2010-03-30 | 2011-10-06 | Cao Lixin | Vertical forging method for integral type steering yoke of automobile |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436676A (en) * | 2013-08-22 | 2013-12-11 | 马钢(集团)控股有限公司 | Heat treatment method for improving structural homogenity of rolled steel integral wheel for large-size railway vehicle |
| CN103436676B (en) * | 2013-08-22 | 2015-09-09 | 马钢(集团)控股有限公司 | A kind of heat treating method improving large-size railway vehicle rolling steel solid wheel homogeneity of structure |
| CN104295736A (en) * | 2014-08-10 | 2015-01-21 | 江西国兴集团兴国齿轮箱拨叉有限公司 | Shift shaft for rear auxiliary box of heavy duty vehicle |
| CN104295736B (en) * | 2014-08-10 | 2016-10-05 | 江西省广蓝传动科技股份有限公司 | Case shift fork axle is paid after a kind of heavy goods vehicles |
| CN105880921A (en) * | 2014-09-28 | 2016-08-24 | 重庆硕睿机械有限公司 | Extrusion forming manufacturing technique for automobile steering column shaft fork integrate piece |
| CN105414424A (en) * | 2015-11-04 | 2016-03-23 | 合肥海源机械有限公司 | Forging method for forklift containing nichrome and fork tooth containing nichrome |
| CN105562572A (en) * | 2015-12-28 | 2016-05-11 | 合肥中澜新材料科技有限公司 | Forging method for shifting fork used for lathe |
| CN106216960A (en) * | 2016-08-18 | 2016-12-14 | 池州学院 | A kind of processing method of selector fork |
| CN107489810A (en) * | 2017-09-13 | 2017-12-19 | 无锡市诚天诺执行器制造有限公司 | A kind of pneumatic actuator high intensity shifting fork device and preparation method thereof |
| CN108118386A (en) * | 2017-12-29 | 2018-06-05 | 重庆全茂合渝科技有限公司 | A kind of motorcycle fork axis electrolytic polishing process |
| CN108193122A (en) * | 2017-12-29 | 2018-06-22 | 重庆全茂合渝科技有限公司 | A kind of processing technology of corrosion-resistant shift fork axle |
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Application publication date: 20130327 |
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