CN103509926A - Steering knuckle processing technology - Google Patents
Steering knuckle processing technology Download PDFInfo
- Publication number
- CN103509926A CN103509926A CN201210203456.9A CN201210203456A CN103509926A CN 103509926 A CN103509926 A CN 103509926A CN 201210203456 A CN201210203456 A CN 201210203456A CN 103509926 A CN103509926 A CN 103509926A
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- CN
- China
- Prior art keywords
- steering knuckle
- bolt hole
- copper pipe
- foundry goods
- stove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a steering knuckle processing technology mainly including the following steps: normalizing treatment of a whole casting part, to be more specific, first the whole casting part is put in an oven of 960 DEG C-980 DEG C for heat preservation for 2 hours, then is put in an oven of 150 DEG C-200 DEG C for cooling with the oven to the room temperature; and local supersonic frequency quenching of a bolt hole position, to be more specific, the local supersonic frequency quenching of the bolt hole position uses induction heating surface quenching, wherein an induction coil used in the bolt hole position is a circular ring enclosed by a copper pipe with a diameter of about 6-10mm, an induction coil used in the four corners of a plate spring is a copper pipe with a diameter of about 6-8mm, alternating current frequencies of the two induction coils are 48 ~ 52Hz, quenching mediums used in the induction heating surface quenching include H2O, NaCl and Na2CO3, and the mass ratio of H2O to NaCl to Na2CO3 is (900 ~ 1100): (8 ~ 12): (3 ~ 7). The steering knuckle processing technology can improve the steering knuckle hardness, increase the bearing weight, the wear resistance and reliability.
Description
Technical field:
The present invention relates to a kind of automobile hanging is device series " steering knuckle " complete processing.
Background technology:
Existing cargo vehicle hangs be steering gear " steering knuckle " because of can not load-bearing large-tonnage, intensive work requirement, and complete processing tradition comparatively, product hardness does not reach real work index, safety coefficient is low, safety is difficult to assurance.There is fracture and cause overturn accident in steering knuckle often.Its replacing needs to take apart a series of fittings that are connected with in reparation, and difficulty and man-hour are all relatively large.
In order to address the above problem, conventional steering knuckle complete processing mainly comprises the whole normalizing treatment of foundry goods and two steps of the local supersonic frequency induction hardening in bolt positioning hole place at present: the whole normalizing treatment of described foundry goods refers to, first foundry goods integral body is incubated to 1.5 hours in the stove of 950 ℃～980 ℃, then after lowering the temperature about 2 hours with stove to 640 ℃ of isothermals air cooling of coming out of the stove, now, although the ferrite in foundry goods is fully separated out, crystalline structure tissue juice is also more even, but has but occurred affecting the banded structure (ferrite is banded) of steering knuckle hardness; Described local supersonic frequency induction hardening refers to quenching technology for surfaces, by ultrasonic frequency heating installation, the upper layer through hardening of foundry goods is arrived to certain degree of depth, and heart part still to keep the not method of a kind of selective hardening of as-quenched condition, this method can make the HRC of foundry goods be the service requirements that surface rockwell hardness after foundry goods quenches reaches product.Because cooling time of quenching technology for surfaces and speed of cooling are all difficult to control, therefore, in quenching technology for surfaces, the skin stress that easily occurs foundry goods is excessive and produce distortion and cracking phenomena, and often occurs the phenomenon that surperficial HRC is too high or too low.
Summary of the invention:
The technical problem to be solved in the present invention is that a kind of steering knuckle complete processing that can improve hardness, antiwear property and the reliability of steering knuckle is provided.
Technical solution of the present invention is that a kind of steering knuckle complete processing, is characterized in that, comprises the following steps:
The whole normalizing treatment of foundry goods is first incubated 2 hours by foundry goods integral body in the stove of 960 ℃～980 ℃, then in the stove of 150 ℃～200 ℃ furnace cooling to normal temperature;
The local supersonic frequency induction hardening in bolt hole place, what the local supersonic frequency induction hardening in described bolt hole place adopted is induced surface hardening, the annulus that the copper pipe disk that the ruhmkorff coil that described bolt hole place is used is is 6～10mm by diameter becomes; The ruhmkorff coil that four jiaos of places of described leaf spring are used is that diameter is the copper pipe of 6～8mm; The frequency of the alternating-current passing through on described two kinds of ruhmkorff coils is 48～52Hz; The quenchant using in induced surface hardening comprises H
2o, NaCl and Na
2cO
3, its mass ratio is (900～1100): (8～12): (3～7).
The whole normalizing treatment of described foundry goods refers to, foundry goods integral body is incubated 2 hours in the stove of 965 ℃, then in the stove of 160 ℃ furnace cooling to normal temperature.
The ruhmkorff coil that described bolt hole place is used is the annulus by the copper pipe disk one-tenth of 8mm.
The ruhmkorff coil that four jiaos of places of described leaf spring are used is the copper pipe that diameter is 6mm.
The frequency of the alternating-current passing through on described ruhmkorff coil is 50Hz.
Described H2O, NaCl and Na2CO3, mass ratio is 1000: 10: 5.
Adopt after above method, the present invention has following remarkable advantage and beneficial effect: the technique adopting due to the whole normalizing treatment of the foundry goods described in the present invention is that foundry goods integral body is incubated to 2 hours in the stove of 950 ℃～980 ℃, then in the stove of 150 ℃～200 ℃ furnace cooling to normal temperature, this mode, in the situation that guaranteeing that ferrite is fully separated out, can also effectively prevent the banded structure that affects balance shaft housing hardness; In addition, local at the bolt hole that steering knuckle is more fragile, the present invention is by adopting ruhmkorff coil and the quenchant of science more, on ruhmkorff coil, passband rate is 48～52Hz alternating-current, thereby cooling time and the speed of cooling of effective control surface quenching technology, the skin stress that prevents foundry goods is excessive and produce distortion and cracking phenomena, has finally improved hardness, antiwear property and the reliability of steering knuckle.
Specific embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
In this specific embodiment, steering knuckle complete processing of the present invention mainly comprises the whole normalizing treatment of foundry goods and two steps of the local supersonic frequency induction hardening in crab bolt pilot hole place; The whole normalizing treatment of foundry goods and local supersonic frequency induction hardening are current common process, different from current common process is, the whole normalizing treatment of foundry goods described in the present invention refers to, first foundry goods integral body is incubated to 2 hours in the stove of 965 ℃, then in the stove of 160 ℃ furnace cooling to normal temperature; And the local supersonic frequency induction hardening employing in described bolt hole place is induced surface hardening; In induced surface hardening, the annulus that the copper pipe disk that the ruhmkorff coil that bolt positioning hole is used is is 8mm by diameter becomes; The ruhmkorff coil that four jiaos of places of described leaf spring are used is the copper pipe that diameter is 6mm; The frequency of the alternating-current passing through on described ruhmkorff coil is 50Hz; The quenchant using in induced surface hardening comprises H
2o, NaCL and Na
2cO
3, its mass ratio is 1000: 10: 5.
Claims (6)
1. a steering knuckle complete processing, is characterized in that, comprises the following steps:
The whole normalizing treatment of foundry goods is first incubated 2 hours by foundry goods integral body in the stove of 960 ℃～980 ℃, then in the stove of 150 ℃～200 ℃ furnace cooling to normal temperature.
The local supersonic frequency induction hardening in bolt hole place, what the local supersonic frequency induction hardening in described bolt hole place adopted is induced surface hardening, the ruhmkorff coil that described bolt hole place is used is by diameter, to be approximately the annulus of the copper pipe disk one-tenth of 6～10mm; The ruhmkorff coil that four jiaos of places of described leaf spring are used is the copper pipe that diameter is approximately 6～8mm; The frequency of the alternating-current passing through on described two kinds of ruhmkorff coils is 48～52Hz; The quenchant using in induced surface hardening comprises H
2o, NaCl and Na
2cO
3, its mass ratio is (900～1100): (8～12): (3～7).
2. steering knuckle complete processing according to claim 1, is characterized in that: the whole normalizing treatment of described foundry goods refers to, foundry goods integral body is incubated 2 hours in the stove of 965 ℃, then in the stove of 160 ℃ furnace cooling to normal temperature.
3. steering knuckle complete processing according to claim 1, is characterized in that: the ruhmkorff coil that described bolt hole place is used is the annulus by the copper pipe disk one-tenth of 8mm.
4. processing method of balance shaft housing according to claim 1, is characterized in that: the ruhmkorff coil that four jiaos of places of described leaf spring are used is the copper pipe that diameter is 6mm.
5. according to the steering knuckle complete processing described in claim 1 or 3 or 4, it is characterized in that: the frequency of the alternating-current passing through on described ruhmkorff coil is 50Hz.
6. steering knuckle complete processing according to claim 1, is characterized in that: described H2O, NaCl and Na2CO3, mass ratio is 1000: 10: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203456.9A CN103509926A (en) | 2012-06-20 | 2012-06-20 | Steering knuckle processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203456.9A CN103509926A (en) | 2012-06-20 | 2012-06-20 | Steering knuckle processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103509926A true CN103509926A (en) | 2014-01-15 |
Family
ID=49893356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210203456.9A Pending CN103509926A (en) | 2012-06-20 | 2012-06-20 | Steering knuckle processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103509926A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1201774A2 (en) * | 2000-10-25 | 2002-05-02 | Gohsyu Corporation | Forging method |
| CN101580895A (en) * | 2009-05-18 | 2009-11-18 | 宁波华盛汽车部件有限公司 | Processing method of balance shaft housing |
-
2012
- 2012-06-20 CN CN201210203456.9A patent/CN103509926A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1201774A2 (en) * | 2000-10-25 | 2002-05-02 | Gohsyu Corporation | Forging method |
| CN101580895A (en) * | 2009-05-18 | 2009-11-18 | 宁波华盛汽车部件有限公司 | Processing method of balance shaft housing |
Non-Patent Citations (1)
| Title |
|---|
| 杨国正: "转向节高频感应淬火工艺及裂纹分析", 《热加工工艺》 * |
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| PB01 | Publication | ||
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Application publication date: 20140115 |