CN101580895B - Processing method of balance shaft housing - Google Patents
Processing method of balance shaft housing Download PDFInfo
- Publication number
- CN101580895B CN101580895B CN2009100986448A CN200910098644A CN101580895B CN 101580895 B CN101580895 B CN 101580895B CN 2009100986448 A CN2009100986448 A CN 2009100986448A CN 200910098644 A CN200910098644 A CN 200910098644A CN 101580895 B CN101580895 B CN 101580895B
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- CN
- China
- Prior art keywords
- shaft housing
- balance shaft
- processing method
- leaf spring
- foundry goods
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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
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Abstract
The invention discloses a processing method of a balance shaft housing. The method mainly comprises the following steps: integral normalizing treatment of casting, and local ultrasonic frequency quenching for five bolt locating holes on four corners and center of a plate spring, wherein the integral normalizing treatment of casting is to insulate the whole casting in a furnace at a temperature ofbetween 950 and 960 DEG C for 2 hours, and to cool the casting in the furnace at a temperature of between 150 and 200 DEG C to normal temperature; the local ultrasonic frequency quenching adopts induction heating surface hardening; in the induction heating surface hardening, an induction coil used in the bolt locating hole in the center of the plate spring is a circular ring coiled by a copper tube with the diameter of between 6 and 10mm; the induction coil used in four corners of the plate spring is a copper tube with diameter of 6 and 10mm; the alternating current frequency passing the induction coils is between 48 and 52Hz; the quenching mediums used in the induction heating surface hardening comprise H2O, NaCl and Na2CO3 in a mass ratio of (900-1,100):(8-12):(3-7). The process can improve the hardness, the abrasion resistance and reliability of the balance shaft housing.
Description
Technical field:
The present invention relates to a kind of processing method of balance shaft housing of automobile balance suspension.
Background technology:
Existing cargo vehicle rear suspension adopts equalizing type of suspension more, many in the equalizing suspension system will be with a balance shaft housing, the top of this balance shaft housing has the leaf spring groove of level, the center of leaf spring trench bottom has leaf spring centre bolt pilot hole, because leaf spring groove and leaf spring are whippy structure, therefore, four jiaos of the leaf spring groove and leaf spring centre bolt pilot hole unavoidably can be because of the loosening wearing and tearing that cause in various degree of U-bolts, also can cause each sheet mutual dislocation of leaf spring during serious wear, even fracture, and cause overturn accident.
In order to address the above problem, present conventional processing method of balance shaft housing mainly comprises two steps of the local ultrasonic frequency quenching of whole normalizing treatment of foundry goods and four jiaos of leaf springs and leaf spring centre bolt pilot hole five places: the whole normalizing treatment of described foundry goods is meant, at first foundry goods integral body is incubated 1.5 hours in 950 ℃～960 ℃ stove, after lowering the temperature about 2 hours with stove then to 640 ℃ of isothermals air cooling of coming out of the stove, at this moment, though the ferrite in the foundry goods is fully separated out, crystalline structure tissue juice also relatively evenly the banded structure (ferrite band shape) of balance shaft housing hardness still but occurred influencing; Described local ultrasonic frequency quenches and is meant quenching technology for surfaces, promptly certain degree of depth is arrived in the upper layer through hardening of foundry goods by the ultrasonic frequency heating installation, 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 all are difficult to control, therefore, in quenching technology for surfaces, the skin stress that occurs foundry goods easily is excessive and produce and distort and cracking phenomena, and occurs the too high or too low phenomenon of surperficial HRC often.
Summary of the invention:
The technical problem to be solved in the present invention is that a kind of processing method of balance shaft housing that can improve hardness, antiwear property and the reliability of balance shaft housing is provided.
Technical solution of the present invention is that a kind of processing method of balance shaft housing that adopts following method is provided: it mainly comprises two steps of the local ultrasonic frequency quenching of whole normalizing treatment of foundry goods and four jiaos of leaf springs and leaf spring centre bolt pilot hole five places; The whole normalizing treatment of described foundry goods is meant foundry goods integral body is incubated 2 hours in 950 ℃～960 ℃ stove, then in 150 ℃～200 ℃ stove furnace cooling to normal temperature; Four jiaos of described leaf springs and the local ultrasonic frequency in leaf spring centre bolt pilot hole five places quench, and what adopt is induced surface hardening; In induced surface hardening, the ruhmkorff coil that described leaf spring centre bolt pilot hole place adopts is to be the annulus of the copper pipe dish one-tenth of 6～10mm by diameter; The ruhmkorff coil that four jiaos of places of described leaf spring use is that diameter is the copper pipe of 6～10mm; The frequency of the alternating-current that passes through on the described ruhmkorff coil is 48～52Hz; The quenchant that uses in the induced surface hardening comprises H
2O, NaCL and Na
2CO
3, its mass ratio is (900～1100): (8～12): (3～7).
After adopting above method, the present invention has following remarkable advantage and beneficial effect: because the technology that the whole normalizing treatment of the foundry goods described in the present invention adopts is that foundry goods integral body is incubated 2 hours in 950 ℃～960 ℃ stove, then in 150 ℃～200 ℃ stove furnace cooling to normal temperature, this mode is guaranteeing can also effectively to prevent the banded structure that influences balance shaft housing hardness under the situation that ferrite is fully separated out; In addition, in balance shaft housing relatively more fragile four jiaos of leaf springs and five places of leaf spring centre bolt pilot hole, the present invention is then by adopting the ruhmkorff coil and the quenchant of science more, logical frequency is 48～52Hz alternating-current on ruhmkorff coil, thereby the 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 balance shaft housing.
Specific embodiment:
The invention will be further described below in conjunction with specific embodiment:
In this specific embodiment, processing method of balance shaft housing of the present invention mainly comprises two steps of the local ultrasonic frequency quenching of whole normalizing treatment of foundry goods and four jiaos of leaf springs and leaf spring centre bolt pilot hole five places; Whole normalizing treatment of foundry goods and local ultrasonic frequency quench and are present common process, different with present common process is, the whole normalizing treatment of foundry goods described in the present invention is meant, earlier foundry goods integral body is incubated 2 hours in 955 ℃ stove, then in 160 ℃ stove furnace cooling to normal temperature; What adopt is induced surface hardening and four jiaos of described leaf springs and the local ultrasonic frequency in leaf spring centre bolt pilot hole five places quench; In induced surface hardening, the ruhmkorff coil that leaf spring centre bolt pilot hole place uses is by the annulus of diameter as the copper pipe dish one-tenth of 8mm; The ruhmkorff coil that four jiaos of places of described leaf spring use is the copper pipe of diameter as 8mm; The frequency of the alternating-current that passes through on the described ruhmkorff coil is 50Hz; The quenchant that uses in the induced surface hardening comprises H
2O, NaCL and Na
2CO
3, its mass ratio is 1000: 10: 5.
Claims (6)
1. a processing method of balance shaft housing mainly comprises two steps of the local ultrasonic frequency quenching in whole normalizing treatment of foundry goods and four jiaos of leaf springs and leaf spring centre bolt pilot hole five places; Four jiaos of described leaf springs and the local ultrasonic frequency in leaf spring centre bolt pilot hole five places quench, and what adopt is induced surface hardening, it is characterized in that:
The whole normalizing treatment of described foundry goods is meant that foundry goods integral body is incubated 2 hours in 950 ℃～960 ℃ stove, then in 150 ℃～200 ℃ stove furnace cooling to normal temperature;
And in induced surface hardening, the ruhmkorff coil that leaf spring centre bolt pilot hole place uses is to be the annulus of the copper pipe dish one-tenth of 6～10mm by diameter; The ruhmkorff coil that four jiaos of places of described leaf spring use is that diameter is the copper pipe of 6～10mm; The frequency of the alternating-current that passes through on described two kinds of ruhmkorff coils is 48～52Hz; The quenchant that uses in the induced surface hardening comprises H
2O, NaCl and Na
2CO
3, its mass ratio is (900～1100): (8～12): (3～7).
2. processing method of balance shaft housing according to claim 1 is characterized in that: the whole normalizing treatment of described foundry goods is meant that foundry goods integral body is incubated 2 hours in 955 ℃ stove, then in 160 ℃ stove furnace cooling to normal temperature.
3. processing method of balance shaft housing according to claim 1 is characterized in that: the ruhmkorff coil that described leaf spring centre bolt pilot hole place uses is the annulus by the copper pipe dish 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 use is the copper pipe of diameter as 8mm.
5. according to claim 1 or 3 or 4 described processing method of balance shaft housing, it is characterized in that: the frequency of the alternating-current that passes through on the described ruhmkorff coil is 50Hz.
6. processing method of balance shaft housing according to claim 1 is characterized in that: described H
2O, NaCl and Na
2CO
3, mass ratio is 1000: 10: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100986448A CN101580895B (en) | 2009-05-18 | 2009-05-18 | Processing method of balance shaft housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100986448A CN101580895B (en) | 2009-05-18 | 2009-05-18 | Processing method of balance shaft housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101580895A CN101580895A (en) | 2009-11-18 |
| CN101580895B true CN101580895B (en) | 2010-12-08 |
Family
ID=41363208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100986448A Expired - Fee Related CN101580895B (en) | 2009-05-18 | 2009-05-18 | Processing method of balance shaft housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101580895B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220462A (en) * | 2011-06-17 | 2011-10-19 | 员苏让 | Inorganic environment-friendly water-soluble quenching agent |
| CN103509926A (en) * | 2012-06-20 | 2014-01-15 | 宁波华盛汽车部件有限公司 | Steering knuckle processing technology |
| CN103882204B (en) * | 2014-02-28 | 2015-12-09 | 济南中森机械制造有限公司 | A kind of parallel shafts online high frequency treatment process of axle housing multiple location and specific complex fixture thereof |
-
2009
- 2009-05-18 CN CN2009100986448A patent/CN101580895B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101580895A (en) | 2009-11-18 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20140518 |
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| DD01 | Delivery of document by public notice |
Addressee: Lou Hubin Document name: Notification of Termination of Patent Right |