CN104308062A - Differential bevel gear finishing bed die - Google Patents
Differential bevel gear finishing bed die Download PDFInfo
- Publication number
- CN104308062A CN104308062A CN201410551912.8A CN201410551912A CN104308062A CN 104308062 A CN104308062 A CN 104308062A CN 201410551912 A CN201410551912 A CN 201410551912A CN 104308062 A CN104308062 A CN 104308062A
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- CN
- China
- Prior art keywords
- workpiece
- bevel gear
- large end
- die cavity
- bed die
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a differential bevel gear finishing bed die. The bed die is provided with an opening conical toothed die cavity, and the inner wall of the die cavity consists of tooth parts and tooth grooves which are arranged at intervals. An outer convex step is arranged on the edge of a tooth profile of a large end surface of the tooth part of the conical toothed die cavity, and the cross section of the outer convex step is an acute triangle. In order to enable a workpiece to be demolded, an oblique edge of the acute triangle of the outer convex step is provided with a die lifting obliquity of 0.5 to 3 degrees. The outer convex step is preset in the die cavity, so that a chamfer angle is prefabricated on the edge of the large-end tooth profile of the workpiece when in finishing molding, an angle between the cutting direction of a cutter and the large end surface when in turning can be increased by adopting the oblique chamfer angle, the impact force of the intermittent turning can be reduced, and the flange phenomenon can be avoided. After the workpiece is finished, the large end surface has no flange, the punching step is omitted, the production efficiency is greatly improved, the collision of the workpiece is also reduced, the machining quality is improved, and the mass production in the equipped production line can be realized.
Description
Technical field
The invention belongs to metal forging mould structure design technical field, specifically, the tooth base that the present invention relates to a kind of gear forging dies structural design, particularly precision forging after turnery processing the flank of tooth without the differential bevel gear finishing bed die of flange.
Background technology
The bevel gear of to be a kind of back side the be sphere of the differential bevel gear in automobile differential, this kind requires very high with location at spherical surface and by the parts of engaged transmission to matching quality.Now, the industry generally adopts liquid metal forging forming technology to manufacture differential bevel gear.In order to improve the meshing quality of differential bevel gear further, after die forging finishing is shaped, implement large end face correction of the flank shape fine finishining again.The front outline of differential bevel gear is the flank of tooth, and the flank of tooth is made up of the tooth equidistantly arranged and teeth groove, is interrupted cut during the finish turning flank of tooth, and because the intersection of tooth and teeth groove is acute angle, during the lathe tool cutting flank of tooth, teeth portion edge metal is easily to turnup in teeth groove.There is the burr of turnup easily to cause gear to assemble difficulty in teeth groove even stuck, therefore one flank of tooth must be increased before product export remove overturning process.In production process, many one manufacturing procedures must increase manufacturing cost, reduce work efficiency.
Summary of the invention
The present invention, mainly for the deficiencies in the prior art, proposes a kind of differential bevel gear finishing bed die making teeth portion and the prefabricated chamfering of teeth groove when finishing is shaped in the lump, and the pre-chamfering structure of this mould is simple, makes easily, work efficiency is high, crudy is stable.
The present invention is achieved through the following technical solutions technical goal.
Differential bevel gear finishing bed die, this mould is provided with the cone gear form die cavity of uncovered shape.Its improvements are: the large end of teeth portion of described cone gear form die cavity is positioned at top, and small end is positioned at bottom, and the flank profil edge along teeth portion large end face is provided with evagination step (A), and the cross section of evagination step (A) is acute triangle.
In said structure, acute angles beta=10 on evagination step (A) cross section
0~ 15
0, acute angle towards gullet base, the across flats B=0.5 ~ 0.8mm of acute angle, the long L=2 ~ 3mm of hypotenuse of acute triangle; α=0.5 is left on the acute triangle limit of evagination step (A)
0~ 3
0pattern draft.
The present invention compared with prior art, has following good effect:
1, the outer lug boss stage structure arranged along teeth portion large end face flank profil edge on cone gear form die cavity top is simple, make easily;
2, evagination step is set in the flank profil of teeth portion large end face, the differential bevel gear large end face flank profil that finishing is shaped reserves chamfering, angle during tilting chamfering increase turning between Tool in Cutting direction and large end face, thus reduce the impulsive force of interrupted turning, avoid flange phenomenon occurs;
3, after workpiece turning, large end face flank profil, without flange, saves blank operation, thus improves work efficiency, also reduces colliding with when inter process has enough to meet the need between workpiece simultaneously, is conducive to improving crudy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the axial section of Fig. 1, shows teeth portion structure.
Fig. 3 is Fig. 2 teeth portion K-K cross-section structure enlarged diagram, shows outer lug boss stage structure.
Fig. 4 is the workpiece close-up schematic view be shaped with structure finishing shown in Fig. 1, shows that chamfering is reserved in large end tooth face.
Fig. 5 is the workpiece that prior art finishing is shaped, and this workpiece teeth portion large end face teeth portion is right-angle side.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, the invention will be further described.
Shown in Fig. 1 differential bevel gear finishing bed die, this mould is provided with the cone gear form die cavity of uncovered shape, and mould intracavity wall is made up of the teeth portion equidistantly arranged and teeth groove.The present invention produces flange when large end face correction of the flank shape fine finishining implemented by workpiece after finishing is shaped, and on the top of cone gear form die cavity, namely the flank profil edge of teeth portion large end face is provided with evagination step A.The k-k cross section of described evagination step A is illustrated in figure 3 acute triangle, and acute angle is towards gullet base.The workpiece of the present embodiment processing is the supporting differential bevel gear of Designing Passenger Car Differentials, and such gear size is relatively little, therefore preset evagination step A size is also little, and acute angles beta is wherein 15
0, the across flats B=0.5mm of acute angle, the long L=2mm of hypotenuse of acute triangle.For the ease of the workpiece demoulding, the acute triangle hypotenuse of evagination step A leaves α=1.5
0pattern draft.The present invention is by preset evagination step A in die cavity, and realize making chamfering when finishing is shaped at the flank profil edge of bevel gear teeth portion large end face and be shaped, its finished product as shown in Figure 4.The angle of cutter and cutting direction when tilting chamfering increases turning teeth portion large end face, thus reduce the impulsive force of interrupted turning, avoid generation flange phenomenon.By enforcement of the present invention, realize workpiece teeth portion large end face correction of the flank shape fine finishining and do not produce flange, save thus and rush overturning process, substantially increase production work efficiency benefit, also reduce colliding with when operation is had enough to meet the need between workpiece simultaneously, be conducive to improving crudy.
Claims (3)
1. a differential bevel gear finishing bed die, this mould is provided with the cone gear form die cavity of uncovered shape; It is characterized in that: the large end of teeth portion of described cone gear form die cavity is positioned at top, small end is positioned at bottom, and the flank profil edge along teeth portion large end face is provided with evagination step (A), and the cross section of evagination step (A) is acute triangle.
2. differential bevel gear finishing bed die according to claim 1, is characterized in that: acute angles beta=10 on described evagination step (A) cross section
0~ 15
0, acute angle towards gullet base, the across flats B=0.5 ~ 0.8mm of acute angle, the long L=2 ~ 3mm of hypotenuse of acute triangle.
3. differential bevel gear finishing bed die according to claim 1, is characterized in that: α=0.5 is left on the acute triangle limit of described evagination step (A)
0~ 3
0pattern draft.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551912.8A CN104308062A (en) | 2014-10-17 | 2014-10-17 | Differential bevel gear finishing bed die |
| PCT/CN2015/092087 WO2016058555A1 (en) | 2014-10-17 | 2015-10-16 | Differential bevel gear finishing bed die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551912.8A CN104308062A (en) | 2014-10-17 | 2014-10-17 | Differential bevel gear finishing bed die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104308062A true CN104308062A (en) | 2015-01-28 |
Family
ID=52363451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410551912.8A Pending CN104308062A (en) | 2014-10-17 | 2014-10-17 | Differential bevel gear finishing bed die |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104308062A (en) |
| WO (1) | WO2016058555A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016058555A1 (en) * | 2014-10-17 | 2016-04-21 | 江苏太平洋精锻科技股份有限公司 | Differential bevel gear finishing bed die |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109550802A (en) * | 2018-12-14 | 2019-04-02 | 江西福格新能源传动技术有限公司 | A kind of differential gear axial direction shunting cold-extrusion shaping apparatus and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62207527A (en) * | 1986-03-06 | 1987-09-11 | Mitsubishi Metal Corp | Manufacture of bevel gear |
| US5245851A (en) * | 1989-09-19 | 1993-09-21 | M.H. Center Limited | Differential pinion, metal mold for plastic working the same, and method for plastic working with the metal mold |
| CN2625080Y (en) * | 2003-06-20 | 2004-07-14 | 株洲齿轮有限责任公司 | Finish forged straight bevel gear tooth die holder |
| DE102007035493A1 (en) * | 2007-07-28 | 2009-01-29 | Volkswagen Ag | Fabrication method for bevel gear e.g. for motor vehicle, involves fabrication of bevel gear by using gyratory die |
| CN204182848U (en) * | 2014-10-17 | 2015-03-04 | 江苏太平洋精锻科技股份有限公司 | Prefabricated chamfering mould in differential bevel gear teeth portion large end face flank profil |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3503816B2 (en) * | 2000-01-24 | 2004-03-08 | トヨタ自動車株式会社 | Bevel gear with web cold forging die and method of manufacturing bevel gear with web |
| JP4309026B2 (en) * | 2000-06-19 | 2009-08-05 | 彰 吉田 | Spiral bevel gear manufacturing equipment |
| KR100736213B1 (en) * | 2006-06-12 | 2007-07-06 | 유림산업 주식회사 | Cold forging method and device thereof for a sidegear of differential limitation equipment |
| CN101628315A (en) * | 2008-07-14 | 2010-01-20 | 江苏飞船股份有限公司 | Cold precision forging tooth die for bevel gear |
| KR100996515B1 (en) * | 2009-03-23 | 2010-11-25 | 임기현 | A Close Type Cold Forging Method and the Device thereof for a Sidegear of Differential Limitation Equipment |
| CN201618827U (en) * | 2009-12-23 | 2010-11-03 | 青岛三星精锻齿轮有限公司 | Toothed die for straight bevel gears of precision forging differential mechanism |
| CN102240774B (en) * | 2011-06-02 | 2013-07-24 | 重庆创精温锻成型有限公司 | Fine forging forming method of spiral bevel gears |
| CN102397971A (en) * | 2011-11-22 | 2012-04-04 | 江苏太平洋精锻科技股份有限公司 | Finishing die block for conjunction gear |
| CN104308062A (en) * | 2014-10-17 | 2015-01-28 | 江苏太平洋精锻科技股份有限公司 | Differential bevel gear finishing bed die |
-
2014
- 2014-10-17 CN CN201410551912.8A patent/CN104308062A/en active Pending
-
2015
- 2015-10-16 WO PCT/CN2015/092087 patent/WO2016058555A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62207527A (en) * | 1986-03-06 | 1987-09-11 | Mitsubishi Metal Corp | Manufacture of bevel gear |
| US5245851A (en) * | 1989-09-19 | 1993-09-21 | M.H. Center Limited | Differential pinion, metal mold for plastic working the same, and method for plastic working with the metal mold |
| CN2625080Y (en) * | 2003-06-20 | 2004-07-14 | 株洲齿轮有限责任公司 | Finish forged straight bevel gear tooth die holder |
| DE102007035493A1 (en) * | 2007-07-28 | 2009-01-29 | Volkswagen Ag | Fabrication method for bevel gear e.g. for motor vehicle, involves fabrication of bevel gear by using gyratory die |
| CN204182848U (en) * | 2014-10-17 | 2015-03-04 | 江苏太平洋精锻科技股份有限公司 | Prefabricated chamfering mould in differential bevel gear teeth portion large end face flank profil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016058555A1 (en) * | 2014-10-17 | 2016-04-21 | 江苏太平洋精锻科技股份有限公司 | Differential bevel gear finishing bed die |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016058555A1 (en) | 2016-04-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |