CN103071971A - Machining method for automotive front axle half shaft - Google Patents
Machining method for automotive front axle half shaft Download PDFInfo
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- CN103071971A CN103071971A CN2012103001295A CN201210300129A CN103071971A CN 103071971 A CN103071971 A CN 103071971A CN 2012103001295 A CN2012103001295 A CN 2012103001295A CN 201210300129 A CN201210300129 A CN 201210300129A CN 103071971 A CN103071971 A CN 103071971A
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- rear axle
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- car rear
- axle semi
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Abstract
The invention discloses a machining method for an automotive front axle half shaft, comprising the following steps that a steel ingot is poured, and the steel ingot comprises the chemical compositions in percentage by weight that C is more than or equal to 0.180 percent and is less than or equal to 0.250 percent, Si is more than or equal to 0.79 percent and is less than or equal to 1.00 percent, Mn is more than or equal to 0.78 percent and is less than or equal to 1.00 percent, P is more than or equal to trace amount and is less than or equal to 0.030 percent, S is more than or equal to trace amount and is less than or equal to 0.030 percent, Cr is more than or equal to 11.50 percent and is less than or equal to 13.50 percent, and inevitable impurities account for the rest amount. The machining method for the automotive front axle half shaft facilitates large-batch industrialized production, the phenomena of dirt containing and insufficient filling in the forging process are reduced, the mechanical performance of products is further improved, the material consumption of the products is saved, and the service life of a mold of the products is improved.
Description
Technical field
The present invention relates to a kind of processing method of automobile front axle semiaxis.
Background technology
Car rear axle semi-axis 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 car rear axle semi-axis through multi-change speed, be delivered on the wheel by car rear axle semi-axis again, propelling vehicle advances or pours into, therefore, car rear axle semi-axis when work have withstand shocks, the effect of alternating bending fatigue load and torsion, so just require car rear axle semi-axis to have enough iron bending strengths, shearing strength and toughness preferably.
At present, utilize the pendulum mill to produce car rear axle semi-axis flange casting technique and mostly be the secondary ignition technique, the car rear axle semi-axis 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 automobile front axle semiaxis, 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 automobile front axle semiaxis may further comprise the steps:
A, cast steel ingot
Chemical component weight percentage is in the steel ingot: 0.180%≤C≤0.250%, 0.79%≤Si≤1.00%, 0.78%≤Mn≤1.00%, trace≤P≤0.030%, trace≤S≤0.030%.11.50%≤Cr≤13.50%, trace≤B≤0.0018%, surplus is 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, form the car rear axle semi-axis intermediate blank, described car rear axle semi-axis intermediate blank has front thick rear thin truncated conical shape part, the scope of the length-to-diameter of this truncated conical shape part is 0.9～1.3, diameter is the average diameter of truncated conical shape part, the described jumping-up blank-making technology time is controlled, made the temperature of car rear axle semi-axis intermediate blank remain on 1100 ℃～1200 ℃;
2) above-mentioned car rear axle semi-axis intermediate blank directly is ground into type in the pendulum mill and obtains the car rear axle semi-axis flange;
C, heat treatment
Car rear axle semi-axis after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-710 ℃ temperature range and is incubated 3h to not being higher than after 100 ℃, afterwards water-cooled; Through after the temper, head with car rear axle semi-axis is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of car rear axle semi-axis is incubated 6-8 hour at 900-1020 ℃, then air cooling, last car rear axle semi-axis middle part heat again to temperature be 160～190 ℃, 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 car rear axle semi-axis after the Shot Blasting is heated to 350 ℃, be incubated 4.5 hours, then the cooling processing of spraying, the afterbody of car rear axle semi-axis is at 990 ℃, be incubated 7 hours, air cooling then, last car rear axle semi-axis middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
The concrete grammar of oil cooling is among the step c: described base substrate body is immersed in the oil groove, and immersion depth is no less than 1.5m and does and moves back and forth.
The present invention makes it be beneficial to large batch of industrialized production, and has reduced the phenomenon that occurs the folder dirt in the forging process, is not fully filled, and the mechanical property of product is further improved, and has saved product materials, has improved the die life of product.
It is as follows that mechanical property of the present invention detects data:
Tensile strength 〉=712 Mpa
Yield strength 〉=566 Mpa
Percentage elongation 〉=16%
The contraction percentage of area 〉=35%
Brinell hardness HB=227-249.
The specific embodiment
A kind of processing method of automobile front axle semiaxis may further comprise the steps:
A, cast steel ingot
Chemical component weight percentage is in the steel ingot: 0.180%≤C≤0.250%, 0.79%≤Si≤1.00%, 0.78%≤Mn≤1.00%, trace≤P≤0.030%, trace≤S≤0.030%.11.50%≤Cr≤13.50%, trace≤B≤0.0018%, surplus is 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, form the car rear axle semi-axis intermediate blank, described car rear axle semi-axis intermediate blank has front thick rear thin truncated conical shape part, the scope of the length-to-diameter of this truncated conical shape part is 0.9～1.3, diameter is the average diameter of truncated conical shape part, the described jumping-up blank-making technology time is controlled, made the temperature of car rear axle semi-axis intermediate blank remain on 1100 ℃～1200 ℃;
2) above-mentioned car rear axle semi-axis intermediate blank directly is ground into type in the pendulum mill and obtains the car rear axle semi-axis flange;
C, heat treatment
Car rear axle semi-axis after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-710 ℃ temperature range and is incubated 3h to not being higher than after 100 ℃, afterwards water-cooled; Through after the temper, head with car rear axle semi-axis is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of car rear axle semi-axis is incubated 6-8 hour at 900-1020 ℃, then air cooling, last car rear axle semi-axis middle part heat again to temperature be 160～190 ℃, 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 car rear axle semi-axis after the Shot Blasting is heated to 350 ℃, be incubated 4.5 hours, then the cooling processing of spraying, the afterbody of car rear axle semi-axis is at 990 ℃, be incubated 7 hours, air cooling then, last car rear axle semi-axis middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
Claims (3)
1. the processing method of an automobile front axle semiaxis is characterized in that, may further comprise the steps:
A, cast steel ingot
Chemical component weight percentage is in the steel ingot: 0.180%≤C≤0.250%, 0.79%≤Si≤1.00%, 0.78%≤Mn≤1.00%, trace≤P≤0.030%, trace≤S≤0.030%, 11.50%≤Cr≤13.50%, trace≤B≤0.0018%, surplus are 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, form the car rear axle semi-axis intermediate blank, described car rear axle semi-axis intermediate blank has front thick rear thin truncated conical shape part, the scope of the length-to-diameter of this truncated conical shape part is 0.9～1.3, diameter is the average diameter of truncated conical shape part, the described jumping-up blank-making technology time is controlled, made the temperature of car rear axle semi-axis intermediate blank remain on 1100 ℃～1200 ℃;
2) above-mentioned car rear axle semi-axis intermediate blank directly is ground into type in the pendulum mill and obtains the car rear axle semi-axis flange;
C, heat treatment
Car rear axle semi-axis after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-710 ℃ temperature range and is incubated 3h to not being higher than after 100 ℃, afterwards water-cooled; Through after the temper, head with car rear axle semi-axis is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of car rear axle semi-axis is incubated 6-8 hour at 900-1020 ℃, then air cooling, last car rear axle semi-axis middle part heat again to temperature be 160～190 ℃, 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 automobile front axle semiaxis according to claim 1, it is characterized in that, head through the car rear axle semi-axis after the Shot Blasting is heated to 350 ℃, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of car rear axle semi-axis is at 990 ℃, be incubated 7 hours, air cooling then, last car rear axle semi-axis middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
3. the processing method of described automobile front axle semiaxis according to claim 1 is characterized in that the concrete grammar of oil cooling is among the step c: described base substrate body is immersed in the oil groove, and immersion depth is no less than 1.5m and does and moves back and forth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103001295A CN103071971A (en) | 2012-08-22 | 2012-08-22 | Machining method for automotive front axle half shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103001295A CN103071971A (en) | 2012-08-22 | 2012-08-22 | Machining method for automotive front axle half shaft |
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| Publication Number | Publication Date |
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| CN103071971A true CN103071971A (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103001295A Pending CN103071971A (en) | 2012-08-22 | 2012-08-22 | Machining method for automotive front axle half shaft |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846636A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Machining method for automotive front axle half shaft |
| CN104084514A (en) * | 2014-07-10 | 2014-10-08 | 吉林圆方机械集团有限公司 | Half axle forging forming technology |
| CN104831201A (en) * | 2015-06-03 | 2015-08-12 | 山东珠峰车业有限公司 | Rear axle shaft of gas-electric hybrid four-wheel vehicle and production method thereof |
| CN106270333A (en) * | 2015-05-21 | 2017-01-04 | 安阳联达数控精密锻造股份有限公司 | A kind of autotruck axle hub axle tube hot extrusion and the method for pendulum rolling composite forming |
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 CN2012103001295A patent/CN103071971A/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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846636A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Machining method for automotive front axle half shaft |
| CN104084514A (en) * | 2014-07-10 | 2014-10-08 | 吉林圆方机械集团有限公司 | Half axle forging forming technology |
| CN104084514B (en) * | 2014-07-10 | 2016-01-20 | 吉林圆方机械集团有限公司 | A kind of semiaxis forging molding process |
| CN106270333A (en) * | 2015-05-21 | 2017-01-04 | 安阳联达数控精密锻造股份有限公司 | A kind of autotruck axle hub axle tube hot extrusion and the method for pendulum rolling composite forming |
| CN104831201A (en) * | 2015-06-03 | 2015-08-12 | 山东珠峰车业有限公司 | Rear axle shaft of gas-electric hybrid four-wheel vehicle and production method thereof |
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Application publication date: 20130501 |