CN101007352A - Processing method of gear supporter in automatic gearbox of automobile - Google Patents
Processing method of gear supporter in automatic gearbox of automobile Download PDFInfo
- Publication number
- CN101007352A CN101007352A CN200710019828.1A CN200710019828A CN101007352A CN 101007352 A CN101007352 A CN 101007352A CN 200710019828 A CN200710019828 A CN 200710019828A CN 101007352 A CN101007352 A CN 101007352A
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- China
- Prior art keywords
- underframe
- upper bracket
- processing method
- automatic gearbox
- product
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Abstract
A processing method of vehicle automatic gearbox gear stand relates to a processing method of mechanical parts. Squeezing and preparing a plate underframe and a upper holdfast with support legs respectively, pre-sintering and final finishing the underframe and upper holdfast respectively, then welding the underframe and the upper holdfast of upper holdfast into one unit, finally heat treating the welded one unit product under the temperature of 150-650DEG C. The invention divides the vehicle automatic gearbox gear stand into two separated powder metallurgy elements, squeezing and shaping respectively then assembly welding. Because of respective squeezing and shaping, the intensity of support legs reaches 6.9-7.0g/cm3, and the torsional property of product is improved, and it avoids the root of every support legs chaps. It produces the two segments respectively, it is easy to final finish the segments of product and increases the machine precision of product. The invention realizes the manufacture aim of low cost, high precision and high production efficiency of complex construction product.
Description
Technical field
The present invention relates to the process technology of a kind of process technology of component of machine, particularly powder metallurgy.
Background technology
Traditional PM technique is because manufacturing procedure complexity, difficulty of processing are big, the assembly low precision, stock utilization is low, price is high, can't manufacturing structure unusual complicated parts.Gear supporter in automatic gearbox of automobile is critical component of auto-producing, it is made up of upper and lower two disc type parts, in order between two disks, to arrange planetary gear, periphery between two disks is uniform and connect five supporting legs, adopted the forging machinery process technology of traditional complexity in the past, caused that production technology is numerous and diverse, processing cost is high.
Summary of the invention
The object of the invention be to invent a kind of be easy to production operation, be beneficial to a kind of processing method of saving cost, gear supporter in automatic gearbox of automobile that the product precision is high.
Technical solution of the present invention is: be crushed to a plate shaped underframe and a upper bracket that has supporting leg respectively, underframe and upper bracket are distinguished presintering, finishing, then, supporting leg sintering with underframe and upper bracket is welded into one again, at last, under 150～650 ℃ temperature, the product that is welded as a whole is heat-treated.
The present invention is resolved into two independently powdered metal parts with gear supporter in automatic gearbox of automobile: a plate shaped underframe and a upper bracket that has supporting leg, behind the extrusion molding, weld respectively again.Because extrusion molding can make leg-supporting density reach 6.9～7.0g/cm respectively
3, and the torsional property of raising product, avoid the root of each supporting leg to crack phenomenon.Make two big parts respectively, the be more convenient for finishing of each parts of product improves the machining accuracy of product, makes the existing higher hardness of product, intensity, plasticity, toughness are preferably arranged again, and the present invention has realized the low cost of labyrinth product, high accuracy, processing purpose that production efficiency is high.
Underframe of the present invention and upper bracket adopt the powder metallurgy that contains Fe:90～99%, C:0～1.0%, Ni:1～5%, Mo:0.5～2.0% to make respectively.This formula materials suppression performance is good, and sintered dimensions is stable, intensity height, characteristics such as wear-resistant.
The presintering in 500 ℃～1000 ℃ low temperature meshbeltfurnace with underframe and upper bracket.In the reducing gas protective atmosphere, carry out once sinteredly, make product have certain intensity, avoid producing the characteristics such as damage, crackle that collapse.
Finishing of the present invention: upper bracket is placed in the two structure finishing molds punching press on the hydraulic press of 500T.Utilize upper punch, the extruding of punch die tool down, can improve the density of upper bracket global facility, also can make supporting leg density reach 7.0～7.3g/cm
3, to improve the intensity of supporting leg.
In addition, difficulty for fear of two parts splicing back reprocessing, also make two welding between parts more firm, the present invention is also when the extruding making has the upper bracket of supporting leg, lower end at each supporting leg is provided with groove, when underframe and upper bracket freeze, in this groove, place scolder, again underframe and upper bracket are press-fitted to freeze and are integral.
Contain Ni:30～45% in the above-mentioned scolder, Cu:30～40%, Mn:10～20%.Special solder formulations fusing point is low, generally at 500～1200 ℃, at first melts in the double sintering process, melts by the capillarity of matrix part to be seeped in the matrix part, when cooling the matrix part is welded together.
The specific embodiment
The operational instances step:
The main technique flow process is: batching → shaping → presintering (once sintered) → finishing → be press-fitted → sintering weldering (double sintering) → heat treatment → check.
1, batching:
(1) powder metallurgical component material:
Fe：90～99％，C：0～1.0％，Ni：1～5％，Mo：0.5～2.0％。
(2) scolder:
Ni：30～45％，Cu：30～40％，Mn：10～20％。
2, be shaped: the gearbox gear support is resolved into 2 independently powdered metal parts: a plate shaped underframe and a upper bracket that has supporting leg, adopt 750 tons of powder extrusion forming machines, the powder metallurgical component material is formed separately by the die cavity extruding.The leg-supporting density of upper bracket reaches 6.9～7.0g/cm
3, and guarantee the root flawless of 5 supporting legs.
In addition, the lower end with each supporting leg of upper bracket is provided with groove respectively.
3, presintering: respectively underframe and upper bracket are placed 500～1000 ℃ low temperature meshbeltfurnace sintering 20 minutes～1 hour.
4, finishing: with upper bracket be placed on once in the two structure finishing molds, punching press on the hydraulic press of 500T.Utilize upper punch, the extruding of punch die tool down, improve the density of upper bracket global facility, also can make supporting leg density reach 7.0～7.3g/cm
3
5, be press-fitted: with the sintering scolder of same weight, weight range is 0.3～1.8g/pcs, is placed on respectively in the groove on 5 leg-supporting end faces of upper bracket, then base plate and upper bracket is press fit over together.
6, sintering weldering: 800～1300 ℃ of body temperatures; in the sintering furnace of speed 50～150mm/mim; under the protection of reducing atmosphere; carry out double sintering; in this process; the effect of oozing of melting by between solder powder and two the parts powder reaches the welding between the part, the high-strength vehicle gear supporter in automatic gearbox that finally is made.
7, heat treatment: under 150～650 ℃ temperature, the product that is welded as a whole is heat-treated.
8, the key technical index of product is as follows:
Require specification value product actual value
Leg-supporting density 7.0g/cm
37.2g/cm
3
Torsion 6100Nmin 8500N radially
Axial distraction force 600Nmim 10000N
Solder side flatness 0.08mm max 0.05mm
Matrix relative position degree 0.25mm max 0.20mm.
Claims (6)
1, a kind of processing method of gear supporter in automatic gearbox of automobile, it is characterized in that being crushed to respectively a plate shaped underframe and a upper bracket that has supporting leg, underframe and upper bracket are distinguished presintering, finishing, then, supporting leg sintering with underframe and upper bracket is welded into one again, under 150～650 ℃ temperature the product that is welded as a whole is heat-treated at last.
2, a kind of processing method of gear supporter in automatic gearbox of automobile according to claim 1 is characterized in that described underframe and upper bracket adopt the powder metallurgy that contains Fe:90～99%, C:0～1.0%, Ni:1～5%, Mo:0.5～2.0% to make respectively.
3,, it is characterized in that presintering in 500 ℃～1000 ℃ low temperature meshbeltfurnace with underframe and upper bracket according to a kind of processing method of the described gear supporter in automatic gearbox of automobile of claim 1.
4, according to a kind of processing method of the described gear supporter in automatic gearbox of automobile of claim 1, it is characterized in that described finishing: upper bracket is placed in the two structure finishing molds punching press on the hydraulic press of 500T.
5, according to a kind of processing method of the described gear supporter in automatic gearbox of automobile of claim 1, it is characterized in that when the extruding making has the upper bracket of supporting leg, lower end at each supporting leg is provided with groove, when underframe and upper bracket freeze, in this groove, place scolder, again underframe and upper bracket are press-fitted to freeze and are integral.
6,, it is characterized in that containing in the described scolder Ni:30～45%, Cu:30～40%, Mn:10～20% according to a kind of processing method of claim 1 or 2 or 3 or 4 or 5 described gear supporter in automatic gearbox of automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710019828.1A CN101007352A (en) | 2007-01-30 | 2007-01-30 | Processing method of gear supporter in automatic gearbox of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710019828.1A CN101007352A (en) | 2007-01-30 | 2007-01-30 | Processing method of gear supporter in automatic gearbox of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101007352A true CN101007352A (en) | 2007-08-01 |
Family
ID=38696133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710019828.1A Withdrawn CN101007352A (en) | 2007-01-30 | 2007-01-30 | Processing method of gear supporter in automatic gearbox of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101007352A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769370A (en) * | 2010-03-02 | 2010-07-07 | 扬州保来得科技实业有限公司 | Powder metallurgy eccentric helical gear and preparation method thereof |
| CN102003522A (en) * | 2010-11-08 | 2011-04-06 | 扬州保来得科技实业有限公司 | Manufacturing method for planetary support of electric power tool gear box |
| CN101758363B (en) * | 2008-12-23 | 2011-06-15 | 东睦新材料集团股份有限公司 | Manufacture method of powder metallurgy support |
| CN101758364B (en) * | 2008-12-23 | 2011-08-17 | 东睦新材料集团股份有限公司 | Method for manufacturing powder metallurgy supporting seat |
| CN103170799A (en) * | 2011-12-22 | 2013-06-26 | 东睦新材料集团股份有限公司 | Preparation method of powder metallurgy support seat |
| CN106216824A (en) * | 2016-08-03 | 2016-12-14 | 扬州意得机械有限公司 | A kind of high-performance welding processing of powder metallurgy chain wheel |
| CN107790713A (en) * | 2017-10-27 | 2018-03-13 | 南京理工大学 | A kind of automobile rearview mirror bases vital part and its method for preparing powder metallurgy |
| CN112460247A (en) * | 2020-11-26 | 2021-03-09 | 江苏智造新材有限公司 | Planetary carrier of automatic transmission of automobile and preparation method thereof |
| CN112517741A (en) * | 2020-10-12 | 2021-03-19 | 无锡曙光模具有限公司 | Special-shaped automobile support and punch forming process thereof |
-
2007
- 2007-01-30 CN CN200710019828.1A patent/CN101007352A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101758363B (en) * | 2008-12-23 | 2011-06-15 | 东睦新材料集团股份有限公司 | Manufacture method of powder metallurgy support |
| CN101758364B (en) * | 2008-12-23 | 2011-08-17 | 东睦新材料集团股份有限公司 | Method for manufacturing powder metallurgy supporting seat |
| CN101769370A (en) * | 2010-03-02 | 2010-07-07 | 扬州保来得科技实业有限公司 | Powder metallurgy eccentric helical gear and preparation method thereof |
| CN102003522A (en) * | 2010-11-08 | 2011-04-06 | 扬州保来得科技实业有限公司 | Manufacturing method for planetary support of electric power tool gear box |
| CN103170799A (en) * | 2011-12-22 | 2013-06-26 | 东睦新材料集团股份有限公司 | Preparation method of powder metallurgy support seat |
| CN103170799B (en) * | 2011-12-22 | 2015-10-14 | 东睦新材料集团股份有限公司 | A kind of preparation method of powder metallurgy support |
| CN106216824A (en) * | 2016-08-03 | 2016-12-14 | 扬州意得机械有限公司 | A kind of high-performance welding processing of powder metallurgy chain wheel |
| CN106216824B (en) * | 2016-08-03 | 2018-12-14 | 扬州意得机械有限公司 | A kind of high-performance welding processing of powder metallurgy chain wheel |
| CN107790713A (en) * | 2017-10-27 | 2018-03-13 | 南京理工大学 | A kind of automobile rearview mirror bases vital part and its method for preparing powder metallurgy |
| CN112517741A (en) * | 2020-10-12 | 2021-03-19 | 无锡曙光模具有限公司 | Special-shaped automobile support and punch forming process thereof |
| CN112460247A (en) * | 2020-11-26 | 2021-03-09 | 江苏智造新材有限公司 | Planetary carrier of automatic transmission of automobile and preparation method thereof |
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