CN101555939A - Processing method of front casing of differential mechanism - Google Patents
Processing method of front casing of differential mechanism Download PDFInfo
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- CN101555939A CN101555939A CNA2008100236146A CN200810023614A CN101555939A CN 101555939 A CN101555939 A CN 101555939A CN A2008100236146 A CNA2008100236146 A CN A2008100236146A CN 200810023614 A CN200810023614 A CN 200810023614A CN 101555939 A CN101555939 A CN 101555939A
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Abstract
The invention relates to a processing method of a front casing of a differential mechanism. The diameter of a handle part is processed to be 65; the heat treatment hardening and tempering requirements of parameters: the hardness is HRC30-33; the depth of a hardened layer in a heat treatment mid-frequency hardening region is 8-12, the small diameter of an involute spline is no less than 6, the hardness is HRC52-58; a big-head bottom hole is processed to be a counter hole with the diameter of 40*2; and the R angle of the root part of a hardening part is processed to be 2.5-3. The invention effectively improves the heat treatment and the process of a part and the structure design of the part, and overcomes the defect of the original design strength of the part, thereby greatly improving the effective strength of the part, preventing the part form being twisted off during the moving, and prolonging the service life of the front casing of an STR differential mechanism.
Description
Technical field:
The present invention relates to a kind of processing method of differential mechanism fore shell.
Technical background:
In product of the same trade at present, phenomenon of rupture for the interaxial differential shell of steyr vehicle is of common occurrence, resemble the heavy vapour of Jinan China, Beijing Automobile Workshop Feitian, An Kai and even Shaanxi Chinese moral, the fracture because of part differential mechanism fore shell in every month has accounted for 10% to 15% of delivering amount.Pacify a triumphant family with regard to Anhui, the compensation because of differential assembly in every month is worth just at 150 to 1,600,000 yuan.The former shank diameter of steyr differential mechanism fore shell is ф 60; Heat treatment quenching and tempering requires: HB187-240; Former heat treatment mid frequency induction hardening district case depth 4-6, involute splines path place are not less than 3, hardness HRC54-60; Hole, former big bottom is 120 degree taper holes; The root at former quenching position is that the formed R of cutter angle is 1mm, and stress is concentrated and had microscopic crack, and product strength is low, and quiet moment of torsion is little, easy-rupturing, and the life-span is low.The fracture of interaxial differential shell becomes problem demanding prompt solution in the same industry the sixth of the twelve Earthly Branches in sum.
Summary of the invention:
Purpose of the present invention is exactly the processing method that a kind of differential mechanism fore shell will be provided, it can solve the problem of steyr differential mechanism fore shell easy-rupturing well, the object of the present invention is achieved like this, and a kind of processing method of differential mechanism fore shell is characterized in that: the shank diameter is processed as ф 65; Heat treatment quenching and tempering requires: hardness is HRC30-33; Mid frequency induction hardening is adopted in shank heat treatment, and case depth is 8-12, and involute splines path place is not less than 6, hardness HRC52-58; Processing major part bottom outlet is a ф 40X2 counterbore; Processing root R angle, quenching position is 2.5-3mm.The present invention not only upward but also from heat treatment, the technology of part has carried out effective improvement from the design of part design, remedied the deficiency of the former design strength of part, thereby the phenomenon that the effective intensity that makes these parts has improved, avoided part to be twisted off in movement process greatly, the working life of having improved steyr differential mechanism fore shell.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
1. microcephaly, 2. shank, 3. quenching position root, 4. inclined hole, 5. cross shaft hole, 6. groove, 7. major part, 8. counterbore.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing;
In the drawings, a kind of processing method of differential mechanism fore shell is characterized in that: shank 2 diameters are processed as ф 65; Heat treatment quenching and tempering requires: hardness is HRC30-33; Mid frequency induction hardening is adopted in shank 2 heat treatments, and case depth is 8-12, and involute splines path place is not less than 6, hardness HRC52-58; Processing major part 7 bottom outlets are ф 40X2 counterbore 8; Processing root 3R angle, quenching position is 2.5-3mm.During concrete enforcement, with material 42GrMo rough forging; Rough turn major part 7, interior R and groove 6, with the check of R model, processing major part 7 bottom outlets adopt ф 40X2 counterbore 8, can increase the structural strength of part, and its spontaneous effective intensity coefficient is increased; Rough turn microcephaly 1, shank 2 diameters are ф 65, and root 3R angle, quenching position is 2.5mm, can increase its torsional strength; Quenching with Subsequent tempering HRC30-33 can reduce hardness gradient, improves the whole synthesis mechanical strength of part; Finish turning major part 7 and interior R are with the check of R model, drill centers ф 4; Finish turning microcephaly 1 and car M33X1.5 screw thread, drill centers ф 4,30 ° of 2X45 ° of band chamfering and chamferings; Last anchor clamps are processed spline mill teeth Z=39 on shank 2, M=1.5, α=30 °; Shank 2 heat treatments adopt that mid frequency induction hardening, case depth 8-12, involute splines path place are not less than 6, hardness HRC52-58; On shank 2 second right steps with numerical control drilling-milling bore boring chamfering hinge 10-ф 12 holes; On major part 7 end faces, tool changing point screw 8-M14X1.5 bottom outlet ф 12.6 positions are dark 5, bore 8-ф 12.6 deep holes, ream ф 14.5 hole depths 2, and tapping 8-M14X1.5 screw, and check with silk rule, bore 36 ° of inclined hole 4-ф 18; Deburring; Lengthening thimble top cylindrical grinding shank 2 and end face R are 2mm, can reduce because of the concentrated microscopic crack problem that produces of the heat treatment stress of mid frequency induction hardening.Differential mechanism fore shell, back cover one are reinstated bolt connect centering and adjust the center, processing cross shaft hole 5 be ф 27, checks with plug, guarantees all position degree requirements and checks with three-coordinates measuring machine; Boring microcephaly 1 with special fixture is ф 5 cross bore; Arrangement microcephaly's 1 M33X1.5 screw thread; Go to institute jagged; Clean, oil, pack, put in storage.The present invention heavily blocks the test standard of the relevant Test item of automobile and checks the quiet moment of torsion of assembly through national car mass supervision and inspection center (Xiangfan) according to country〉35000Nm, meet NBS.
Claims (1)
1. the processing method of a differential mechanism fore shell, it is characterized in that: shank (2) diameter is processed as ф 65; Heat treatment quenching and tempering requires: hardness is HRC30-33; Shank (2) adopts heat treatment mid frequency induction hardening, and case depth is 8-12, and involute splines path place is not less than 6, hardness HRC52-58; Processing major part (7) bottom outlet is a ф 40X2 counterbore (8); Processing quenching position root (3) R is 2.5-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100236146A CN101555939A (en) | 2008-04-09 | 2008-04-09 | Processing method of front casing of differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100236146A CN101555939A (en) | 2008-04-09 | 2008-04-09 | Processing method of front casing of differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101555939A true CN101555939A (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100236146A Pending CN101555939A (en) | 2008-04-09 | 2008-04-09 | Processing method of front casing of differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101555939A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862950A (en) * | 2010-06-18 | 2010-10-20 | 大同齿轮(昆山)有限公司 | Manufacturing process of metal workpiece |
| CN101992309A (en) * | 2010-10-25 | 2011-03-30 | 鞠小平 | Machining method for cross-shaped shaft holes of differential mechanism semi-shells |
| CN103071986A (en) * | 2013-01-11 | 2013-05-01 | 安徽省临泉县智创精机有限公司 | Processing technology for synchronous pulley supporting axle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525078A (en) * | 2003-02-28 | 2004-09-01 | Ntn株式会社 | Differential supported by rolling element bearing with a shaft and gears and a method of manufacturing the rolling elements, the races, the shaft and the gears by hardening including carbonitriding |
| CN101036965A (en) * | 2007-04-24 | 2007-09-19 | 江苏恒义汽配制造有限公司 | Method for processing differential shell between the heavy automobile bridges |
| CN200971046Y (en) * | 2006-09-27 | 2007-11-07 | 山东时风（集团）有限责任公司 | Rear-axle of electric vehicle |
-
2008
- 2008-04-09 CN CNA2008100236146A patent/CN101555939A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525078A (en) * | 2003-02-28 | 2004-09-01 | Ntn株式会社 | Differential supported by rolling element bearing with a shaft and gears and a method of manufacturing the rolling elements, the races, the shaft and the gears by hardening including carbonitriding |
| CN200971046Y (en) * | 2006-09-27 | 2007-11-07 | 山东时风（集团）有限责任公司 | Rear-axle of electric vehicle |
| CN101036965A (en) * | 2007-04-24 | 2007-09-19 | 江苏恒义汽配制造有限公司 | Method for processing differential shell between the heavy automobile bridges |
Non-Patent Citations (3)
| Title |
|---|
| 包雪鹏等: "铸态球铁差速器壳的高频感应淬火工艺", 《汽车工艺与材料》 * |
| 孙丽娟等: "汽油车差速器壳内球面加工工装设计", 《煤矿机械》 * |
| 张红梅，王涛: "斯太尔差速器壳进口件及国产件材质理化性能对比分析", 《重型汽车》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862950A (en) * | 2010-06-18 | 2010-10-20 | 大同齿轮(昆山)有限公司 | Manufacturing process of metal workpiece |
| CN101992309A (en) * | 2010-10-25 | 2011-03-30 | 鞠小平 | Machining method for cross-shaped shaft holes of differential mechanism semi-shells |
| CN103071986A (en) * | 2013-01-11 | 2013-05-01 | 安徽省临泉县智创精机有限公司 | Processing technology for synchronous pulley supporting axle |
| CN103071986B (en) * | 2013-01-11 | 2016-10-26 | 安徽省临泉县智创精机有限公司 | The processing technique of synchronous belt wheel supporting shaft |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20091014 |
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