CN102886642A - Method for manufacturing steering knuckle for automobile - Google Patents

Method for manufacturing steering knuckle for automobile Download PDF

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Publication number
CN102886642A
CN102886642A CN201210333715XA CN201210333715A CN102886642A CN 102886642 A CN102886642 A CN 102886642A CN 201210333715X A CN201210333715X A CN 201210333715XA CN 201210333715 A CN201210333715 A CN 201210333715A CN 102886642 A CN102886642 A CN 102886642A
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China
Prior art keywords
equal
incubated
knuckle
less
weight percent
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Pending
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CN201210333715XA
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Chinese (zh)
Inventor
杨奎琦
陈正义
张斌
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Changli Forging Co Ltd
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Changli Forging Co Ltd
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Application filed by Changli Forging Co Ltd filed Critical Changli Forging Co Ltd
Priority to CN201210333715XA priority Critical patent/CN102886642A/en
Publication of CN102886642A publication Critical patent/CN102886642A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for manufacturing a steering knuckle for an automobile. The method comprises the following steps of: (a) casting a steel ingot, wherein the steel ingot comprises more than and equal to 0.37 and less than and equal to 0.44 weight percent of C, more than and equal to 0.15 and less than and equal to 0.35 weight percent of Si, more than and equal to 0.70 and less than and equal to 0.90 weight percent of Mn, more than and equal to 0.15 and less than and equal to 0.25 weight percent of P, more than and equal to 0.15 and less than and equal to 0.025 weight percent of S, more than and equal to 0.70 and less than and equal to 0.95 weight percent of Cr, more than and equal to 0.30 and less than and equal to 0.40 weight percent of Mo, more than and equal to 1.60 and less than and equal to 2.00 weight percent of Ni and more than and equal to 0.10 and less than and equal to 0.20 weight percent of Cu; and (b) 1, manufacturing a blank, namely upsetting one end of a cylindrical blank and flattening the upset end, 2, pre-forging, namely forging the manufactured blank by using a close die, forming a flash cavity which circumferentially extends at a joint of an upper die cavity and a lower die cavity of the close die, and connecting the periphery of the flash cavity and an upper die and a lower die, and 3, performing finish forging, namely forging a preforged piece by using an open die. By the method, the blank is convenient to manufacture efficiently and easy to forge and form; the forged steering knuckle high in strength, long in service life, safe and reliable; and the method is suitable for producing various models of crawler belt plates on a large scale.

Description

A kind of manufacture method of steering knuckle of vehicle
Technical field
The present invention relates to the manufacture method of knuckle, specifically belong to a kind of manufacture method of steering knuckle of vehicle.
Background technology
Knuckle is one of major part on the steering axle of automobile, vehicle steadily is travelled and the sensitive travel direction of transmitting, and the function of knuckle is to bear automotive front load, and supporting also drives front-wheel and rotates and make motor turning around stub.This product of large batch of production, large with labor intensity of operating staff, product quality is inappropriate this technique of using entirely with manual control, labour-intensive technology, production efficiency is very low.
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of steering knuckle of vehicle, base is convenient, and efficient is high, and forging molding is easy, and the knuckle intensity that forges is good, and long service life is safe and reliable, is applicable to the production in enormous quantities of the knuckle of various models.
Technical scheme of the present invention is as follows:
A kind of manufacture method of steering knuckle of vehicle has following steps:
A) preparation and casting have the steel ingot of following percentage by weight: 0.37%≤C≤0.44%, 0.15≤Si≤0.35%, 0.70%≤Mn≤0.90%, 0.15≤P≤0.25%, 0.015≤S≤0.025%, 0.70%≤Cr≤0.95%, 0.30%≤Mo≤0.40%, 1.60≤Ni≤2.00%, 0.10≤Cu≤0.20%, surplus is Fe and inevitable impurity, and the steel ingot temperature of casting is down to 300 ℃, is heated to 670-760 ℃ again, be incubated 3-5 hour, stove is chilled to 300 ℃, is incubated 4 hours, is heated to 650-760 ℃ again, be incubated 10 hours, be cooled to 400 ℃ with 50 ℃/hour, again with 20 ℃/hour, be cooled to 140 ℃;
B), 1) base, first cylinder blank one end is carried out jumping-up and processes, the side pressure after afterwards jumping-up being processed is flat; 2) blocking forges the blank that makes with closed molds, the upper model cavity of closed molds and the junction of counterdie die cavity are provided with the overlap chamber of circumferential extension, and overlap chamber periphery connects the faying face of upper die and lower die; 3) finish-forging forges the forging behind the blocking with open die;
C) the described base substrate that generates in 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 knuckle is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of knuckle is incubated 6-8 hour at 900-1020 ℃, then air cooling, last knuckle middle part heat again to temperature be 160~180 ℃, be incubated 2-3 hour, put into iron case cooling in heap;
D) base substrate that generates in the step c) is carried out roughing;
E) phosphatization is processed, be 280-300 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1-2min, after dripping empty 1-2min, adopt bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min workpiece is placed 78-100 ℃ hot water;
F) carry out machined to make described knuckle to generating base substrate in the step e).
The head of described step c) knuckle base substrate is heated to 350 ℃, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of knuckle is incubated 7 hours, then air cooling at 980 ℃, last knuckle middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
Base of the present invention is convenient, and efficient is high, and forging molding is easy, and the knuckle intensity that forges is good, and long service life is safe and reliable, is applicable to the production in enormous quantities of the knuckle of various models.
The mechanical property of knuckle of the present invention: tensile strength Rm 〉=830Mpa, yield strength Re 〉=690Mpa, percentage elongation A 〉=14%, mechanical property Z 〉=30%.
The specific embodiment
A kind of manufacture method of steering knuckle of vehicle has following steps:
A) preparation and casting have the steel ingot of following percentage by weight: 0.37%≤C≤0.44%, 0.15≤Si≤0.35%, 0.70%≤Mn≤0.90%, 0.15≤P≤0.25%, 0.015≤S≤0.025%, 0.70%≤Cr≤0.95%, 0.30%≤Mo≤0.40%, 1.60≤Ni≤2.00%, 0.10≤Cu≤0.20%, surplus is Fe and inevitable impurity, and the steel ingot temperature of casting is down to 300 ℃, is heated to 670-760 ℃ again, be incubated 3-5 hour, stove is chilled to 300 ℃, is incubated 4 hours, is heated to 650-760 ℃ again, be incubated 10 hours, be cooled to 400 ℃ with 50 ℃/hour, again with 20 ℃/hour, be cooled to 140 ℃;
B), 1) base, first cylinder blank one end is carried out jumping-up and processes, the side pressure after afterwards jumping-up being processed is flat; 2) blocking forges the blank that makes with closed molds, the upper model cavity of closed molds and the junction of counterdie die cavity are provided with the overlap chamber of circumferential extension, and overlap chamber periphery connects the faying face of upper die and lower die; 3) finish-forging forges the forging behind the blocking with open die;
C) the described base substrate that generates in 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, the head with the knuckle base substrate is heated to 350 ℃ again, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of knuckle is incubated 7 hours, then air cooling at 980 ℃, last knuckle middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap;
D) base substrate that generates in the step c) is carried out roughing;
E) phosphatization is processed, be 280-300 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1-2min, after dripping empty 1-2min, adopt bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min workpiece is placed 78-100 ℃ hot water;
F) carry out machined to make described knuckle to generating base substrate in the step e).

Claims (2)

1. the manufacture method of a steering knuckle of vehicle is characterized in that, has following steps:
A) preparation and casting have the steel ingot of following percentage by weight: 0.37%≤C≤0.44%, 0.15≤Si≤0.35%, 0.70%≤Mn≤0.90%, 0.15≤P≤0.25%, 0.015≤S≤0.025%, 0.70%≤Cr≤0.95%, 0.30%≤Mo≤0.40%, 1.60≤Ni≤2.00%, 0.10≤Cu≤0.20%, surplus is Fe and inevitable impurity, and the steel ingot temperature of casting is down to 300 ℃, is heated to 670-760 ℃ again, be incubated 3-5 hour, stove is chilled to 300 ℃, is incubated 4 hours, is heated to 650-760 ℃ again, be incubated 10 hours, be cooled to 400 ℃ with 50 ℃/hour, again with 20 ℃/hour, be cooled to 140 ℃;
B), 1) base, first cylinder blank one end is carried out jumping-up and processes, the side pressure after afterwards jumping-up being processed is flat; 2) blocking forges the blank that makes with closed molds, the upper model cavity of closed molds and the junction of counterdie die cavity are provided with the overlap chamber of circumferential extension, and overlap chamber periphery connects the faying face of upper die and lower die; 3) finish-forging forges the forging behind the blocking with open die;
C) the described base substrate that generates in 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 knuckle is heated to 320-380 ℃ again, be incubated 4-5 hour, then the cooling processing of spraying, the afterbody of knuckle is incubated 6-8 hour at 900-1020 ℃, then air cooling, last knuckle middle part heat again to temperature be 160~180 ℃, be incubated 2-3 hour, put into iron case cooling in heap;
D) base substrate that generates in the step c) is carried out roughing;
E) phosphatization is processed, be 280-300 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1-2min, after dripping empty 1-2min, adopt bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min workpiece is placed 78-100 ℃ hot water;
F) carry out machined to make described knuckle to generating base substrate in the step e).
2. the manufacture method of described steering knuckle of vehicle according to claim 1, it is characterized in that, the head of described step c) knuckle base substrate is heated to 350 ℃, is incubated 4.5 hours, the cooling processing of then spraying, the afterbody of knuckle is at 980 ℃, be incubated 7 hours, air cooling then, last knuckle middle part heat again to temperature be 170 ℃, be incubated 2.5 hours, put into iron case cooling in heap.
CN201210333715XA 2012-09-11 2012-09-11 Method for manufacturing steering knuckle for automobile Pending CN102886642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210333715XA CN102886642A (en) 2012-09-11 2012-09-11 Method for manufacturing steering knuckle for automobile

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Application Number Priority Date Filing Date Title
CN201210333715XA CN102886642A (en) 2012-09-11 2012-09-11 Method for manufacturing steering knuckle for automobile

Publications (1)

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CN102886642A true CN102886642A (en) 2013-01-23

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103537677A (en) * 2013-10-11 2014-01-29 芜湖市鸿坤汽车零部件有限公司 Sintered alloy containing chromium and preparation method thereof
CN110252917A (en) * 2019-06-18 2019-09-20 湖北三环锻造有限公司 Obtain the knuckle arm forging technology of good metal streamline
CN111745113A (en) * 2020-06-16 2020-10-09 安徽博斯特科技有限公司 Compound forging method and closed die for branch bud type complex forge piece

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1398690A (en) * 2002-08-10 2003-02-26 燕山大学 Precise forging technology for automobile steering knuckle
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
CN101670417A (en) * 2009-09-29 2010-03-17 重庆凯恩机械制造有限公司 Steering knuckle forging molding process of heavy truck
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
CN101972835A (en) * 2010-09-10 2011-02-16 湖北三环锻造有限公司 Closed forging technique for steering knuckle
WO2011120328A1 (en) * 2010-03-30 2011-10-06 Cao Lixin Vertical forging method for integral type steering yoke of automobile
CN102489659A (en) * 2011-11-16 2012-06-13 日照市七星汽车部件有限公司 Method for forging steering knuckle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1398690A (en) * 2002-08-10 2003-02-26 燕山大学 Precise forging technology for automobile steering knuckle
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
CN101670417A (en) * 2009-09-29 2010-03-17 重庆凯恩机械制造有限公司 Steering knuckle forging molding process of heavy truck
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
CN101972835A (en) * 2010-09-10 2011-02-16 湖北三环锻造有限公司 Closed forging technique for steering knuckle
CN102489659A (en) * 2011-11-16 2012-06-13 日照市七星汽车部件有限公司 Method for forging steering knuckle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103537677A (en) * 2013-10-11 2014-01-29 芜湖市鸿坤汽车零部件有限公司 Sintered alloy containing chromium and preparation method thereof
CN110252917A (en) * 2019-06-18 2019-09-20 湖北三环锻造有限公司 Obtain the knuckle arm forging technology of good metal streamline
CN111745113A (en) * 2020-06-16 2020-10-09 安徽博斯特科技有限公司 Compound forging method and closed die for branch bud type complex forge piece

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Application publication date: 20130123