CN202479422U - Precisely forging and forming die of gear shaft - Google Patents
Precisely forging and forming die of gear shaft Download PDFInfo
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- CN202479422U CN202479422U CN2012200486783U CN201220048678U CN202479422U CN 202479422 U CN202479422 U CN 202479422U CN 2012200486783 U CN2012200486783 U CN 2012200486783U CN 201220048678 U CN201220048678 U CN 201220048678U CN 202479422 U CN202479422 U CN 202479422U
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- shaping dies
- die
- external gear
- gear shaft
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Abstract
The utility model discloses a precisely forging and forming die of a gear shaft. The precisely forging and forming die comprises a shaft forming die, an outer gear forming die and a core die, wherein the outer gear forming die is composed of four sub dies with the same appearances; the inner surface of each sub die is a 1/4 tooth arc surface; the lateral surface of each sub die is an inclined plane with 45-degree angle; the four sub dies are spliced into the outer gear forming die with teeth on the inner surface; the inner surface of each sub die of the outer gear forming die is equally divided into a pre-forming section and a shaping section; and the core die is divided into a pattern drawing section, a forming section and a fixing section, and the forming section is located at the middle part of the core die for forming an involute internal spline. According to the utility model, the outer gear forming die of the gear shaft is designed on the basis of the existing rotary forging technology, so that the rotary forging technology is applied to production of the gear shaft, the structure is simple and the service life is long.
Description
Technical field
The present invention relates to the production field of gear shaft, specifically is a kind of precision forging mould that gear shaft is produced in swaging that is used for.
Background technology
Gear shaft is as drive disk assembly important in the plant equipment, and higher contact load effect is being born at its engagement position during work, serious wear, and gear fatigue damage very easily under the alternate load effect.Therefore, improve gears engaged regional intensity and wearability and just seem particularly important.At present, main extruding or the forging mold of utilizing of gear and gear shaft processing is from axially carrying out pressure forming.The innovation and creation of publication number CN1367051 have proposed a kind of gear precision shaping dies; The discharging section that the feed zone that the gear die cavity of said mould is tilted by tooth top and tooth root, similar with gear part isometrical section, tooth top and tooth root tilt constitutes, and this mould of employing can reduce distortion of materials power in warm extrusion pressure process.The innovation and creation of publication number CN2460237 are through designing cold warm extrusion molding die, and inside and outside circle helical gear simultaneously can be shaped in the one action process.The innovation and creation of publication number CN1868633 and CN1569351 propose through the forward extrusion effect shaping straight spur gear method between seaming chuck and the die, and the profile parameters of the die of forward extrusion mould is identical with the parameter of straight spur gear to be formed in the forming process.The innovation and creation of publication number CN101025225 and CN101214510 adopt backward extrusion technology to be formed separately out the gear member and the blind hole internal gear of fluid drive automotive trannsmission system on cold forging forcing press or hydraulic press.In said two inventions, the shape of the die of cold extrusion die is all corresponding with the outline of gear product.The higher gear of floating cavity die structure formation precision is all adopted in the innovation and creation of publication number CN1593807 and CN201711484, and this mould effectively reduces the load in the forming process, has improved die life.The innovation and creation of publication number CN101284299 have proposed a kind of gear-box planetary gear shaping die, and said mould is made up of upper die and lower die and spiral ejecting mechanism, the bigger helix cylindrical gear of this mould wrought helical angle.The innovation and creation of publication number CN201815618U have proposed a kind of finish forge mould of straight spur gear profile of tooth, and advantage mainly shows the gears engaged intensity height that work efficiency is high, be shaped and.The innovation and creation of publication number CN101031375 have proposed to adopt a plurality of forging molds method of bevel gear that is shaped, and this invention can effectively raise production efficiency through in forming process, accomplishing piercing and shaping die simultaneously and going flash shaping two procedures.The innovation and creation of publication number CN1820891 have improved the fillibility at forming process middle gear crown place through setting up diffluence pass at blank or bearing of die.Aspect the gear shaft shaping; The innovation and creation of publication number CN101332488 and CN101342566 are formed separately angular wheel shaft and the gear shaft that has internal gear through adopting forward extrusion and backward extrusion technology, in the forming process different extrusion dies have been adopted in the shaping of axle and gear respectively.
Above-mentioned traditional moulds exists or is inappropriate for gear shaft and is shaped, the deficiency that perhaps precision and requirement of strength are high, service life is short.
Summary of the invention
For overcome exist in the prior art or be inappropriate for gear shaft and be shaped, the deficiency that perhaps precision and requirement of strength are high, lack service life the present invention proposes a kind of precision forging mould of gear shaft.
The precision forging mould of gear shaft of the present invention comprises a shaping dies, external gear shaping dies and core.Described external gear shaping dies is made up of four identical branch moulds of profile, and each minute mould inner surface be 1/4 arc surface of dentation, each minute the side surface of mould be 45 ° inclined-plane, be the external gear shaping dies that inner surface has tooth with the amalgamation of four branch moulds.Described external gear shaping dies each minute mould inner surface be divided into preform section and plastic section two parts, divide the length of mould plastic section to get 70～95% of bar regional diameter to be formed, the length of preform section is got 40～60% of bar regional diameter to be formed.The draft angle on tooth withdrawing pattern inclined-plane is all got 2 ° on each minute mould inner surface.The cone angle of the preform section of said external gear shaping dies is 3.1 °.All the number of teeth with gear shaft to be processed is identical for the number of teeth of the plastic section of said external gear shaping dies and preform section.The modulus of the plastic section of said external gear shaping dies is identical with the modulus of gear shaft to be processed, and the modulus of said external gear shaping dies preform section is confirmed according to bar diameter ÷ (number of teeth-2.5).
Said core is divided into withdrawing pattern section, shaped segment and canned paragraph.Shaped segment is positioned at the mid portion of core, is used to the involute inner spline that is shaped.The number of teeth of said shaped segment outer round surface tooth is identical with the number of teeth and the modulus of gear shaft end face involute inner spline with modulus.The root circle of said core shaped segment and canned paragraph cylindrical are the cone of smooth transition, and the angle between the center line of this cone outer round surface and core is 3 °.
The present invention is through designing the gear shaft forging mold, makes the swaging method be applied to gear shaft and is shaped, and makes the gear shaft external gear near surface grain structure after the shaping be streamline distribution, improved the intensity and the anti-wear performance of gear shaft; The microstructure of the inner near axis of gear shaft has then kept the bar original toughness, makes gear shaft can bear bigger impact loading.Compare with conventional tooth wheel shaft forging mold, the present invention is simple in structure, has improved the service life of mould.
With prior art relatively, swaging is a kind of special-purpose production technology of producing accurate axle type part on to the spin-forging machine that hits at many tups.This technology utilization the advantage of axialy symmetric part, the higher forging shaft of precision can be shaped through the rotation of blank gradually.The present invention through gear shaft external gear shaping dies is designed, makes the production of swaging process application in gear shaft on the basis of existing swaging technology.
Description of drawings
Accompanying drawing 1 is the structural representation of the precision forging mould of gear shaft;
Accompanying drawing 2 is axonometric drawings of branch mould;
Accompanying drawing 3 is cutaway views of branch mould;
Accompanying drawing 4 is axonometric drawings of external gear shaping dies;
Accompanying drawing 5 is structural representations of external gear shaping dies;
Accompanying drawing 6 is shape sketch mapes of embodiment one middle gear axle;
Accompanying drawing 7 is structural representations of core.
1. 2. shaping dies of original bar, 3. external gear shaping dies, 4. preform sections, 5. plastic section
6. preform section cone angle 7. teeth 8. withdrawing pattern inclined-planes 9. involute inner splines, 10. longitudinal end
11. external gear 12. minor axis sections 13. withdrawing pattern sections 14. shaped segments 15. canned paragraphs
The specific embodiment
Embodiment one
Present embodiment is a kind of precision forging mould of gear shaft, comprises a shaping dies 2, external gear shaping dies 3 and core, is respectively applied for rough forge, finish forge in the gear shaft shaping, and external gear is shaped and involute inner spline is shaped.Wherein, axle shaping dies 2 adopts prior art.
Like Fig. 2～shown in Figure 5.Described external gear shaping dies 3 is made up of four identical branch moulds of profile, and each minute mould of described external gear shaping dies 3 is bulk, and each minute mould outer surface be the plane, inner surface is 1/4 arc surface of dentation; Each minute, the side surface of mould was 45 ° inclined-plane, made that the right angle cooperates between the side surface of two adjacent branch moulds.With the amalgamation of four branch moulds, make the dentate gyrus cambered surface of four branch moulds be combined into the external gear shaping dies 3 that inner surface has tooth 7.
Described external gear shaping dies 3 each minute mould inner surface be divided into preform section 4 and plastic section 5 two parts; Divide the length of mould plastic section 4 to get 70～95% of bar 1 regional diameter to be formed, the length of preform section 4 is got 40～60% of bar 1 regional diameter to be formed.In the present embodiment, the length of said preform section 4 and plastic section 5 is respectively 75mm and 132mm, and all there is tooth 7 on the surface, and the draft angle on tooth 7 withdrawing pattern inclined-planes 8 is all got 2 ° on each minute mould inner surface.As shown in Figure 6.
Plastic section 5 internal diameters of said external gear shaping dies equate, preform section 4 tapers of said external gear shaping dies, and the cone angle 6 of this preform section is 3.1 °.
All the number of teeth with gear shaft to be processed is identical with the number of teeth of preform section 4 for the plastic section 5 of said external gear shaping dies; The modulus of the plastic section 5 of said external gear shaping dies is identical with the modulus of gear shaft to be processed; The modulus of said external gear shaping dies preform section 4 is confirmed according to bar 1 diameter ÷ (number of teeth-2.5); In the present embodiment; The modulus of preform section 4 continuously, makes the reference diameter of these preform section 4 inner surface teeth constitute the conical surface between 3～3.33.
As shown in Figure 8.Said core is a revolving body, axially is divided into three parts along core: withdrawing pattern section 13, shaped segment 14 and canned paragraph 15.Wherein, withdrawing pattern section 13 is positioned at core one end, is shaped as isometrical cylinder, and its external diameter makes the end face of this withdrawing pattern section 13 form the locating surface that cooperates with involute inner spline 9 greater than the internal diameter in gear shaft end face involute inner spline 9 holes.Shaped segment 14 is positioned at the mid portion of core, and involute inner spline 9 is used to be shaped.Said shaped segment outer round surface has tooth, and the number of teeth of this tooth is identical with the number of teeth and the modulus of gear shaft end face involute inner spline 9 with modulus.Canned paragraph 15 is positioned at the other end of core, and the outer round surface of this canned paragraph 15 is a polished rod.
The root circle of said core shaped segment 14 and canned paragraph 15 cylindricals are the cone of smooth transition, and the angle between the center line of this cone outer round surface and core is 3 °.In the present embodiment, the tooth of shaped segment 14 outer surfaces is 18, and modulus is 2.5, and pressure angle is 30 °.The length of core withdrawing pattern section 13, shaped segment 14 and canned paragraph 15 is respectively 40mm, 48mm and 32mm.
Employed axle shaping dies 2 adopts prior art in the present embodiment, and its parameter can be according to " the forging technology handbook checks in.
As shown in Figure 1, the said axle shaping dies 2 that is used for rough forge and finish forge has four, and wherein three is rough forge axle shaping dies.The undergauge first time that is used for rough forge in three rough forge axle shaping dies, another is used for undergauge for the second time; The 3rd rough forge axle shaping dies involute inner spline 9 that is used to be shaped.The said shaping region internal diameter that is used for the axle shaping dies of undergauge for the first time is greater than the shaping region internal diameter of axle shaping dies of the undergauge second time.
The parameter of said three rough forge axle shaping dies 2 is respectively:
Rough forge: the shaping region diameter of the axle shaping dies that the first time, undergauge used is 120mm, holds district diameter 165mm tightly, die length 132mm, import arc radius 41.25mm.The shaping region diameter of the axle shaping dies that the second time, undergauge used is 100mm, holds district diameter 120mm tightly, die length 96mm, import arc radius 27mm.The shaping region diameter of rough forge axle shaping dies of involute inner spline of being used to be shaped is 74mm, holds district diameter 100mm tightly, die length 80mm, import arc radius 20mm.
Finish forge: the shaping region diameter that is used for finish forge axle shaping dies is 90mm, holds district diameter 100mm tightly, die length 80mm, import arc radius 25mm.
Claims (1)
1. the precision forging mould of a gear shaft; Comprise a shaping dies, external gear shaping dies and core; It is characterized in that described external gear shaping dies is made up of four identical branch moulds of profile, and each minute mould inner surface be 1/4 arc surface of dentation; Each minute, the side surface of mould was 45 ° inclined-plane, was the external gear shaping dies that inner surface has tooth with the amalgamation of four branch moulds; Described external gear shaping dies each minute mould inner surface be divided into preform section and plastic section two parts, divide the length of mould plastic section to get 70～95% of bar regional diameter to be formed, the length of preform section is got 40～60% of bar regional diameter to be formed; The draft angle on tooth withdrawing pattern inclined-plane is all got 2 ° on each minute mould inner surface; The cone angle of the preform section of said external gear shaping dies is 3.1 °; All the number of teeth with gear shaft to be processed is identical for the number of teeth of the plastic section of said external gear shaping dies and preform section; The modulus of the plastic section of said external gear shaping dies is identical with the modulus of gear shaft to be processed, and the modulus of said external gear shaping dies preform section is confirmed according to bar diameter ÷ (number of teeth-2.5);
Said core is divided into withdrawing pattern section, shaped segment and canned paragraph; Shaped segment is positioned at the mid portion of core, is used to the involute inner spline that is shaped; The number of teeth of said shaped segment outer round surface tooth is identical with the number of teeth and the modulus of gear shaft end face involute inner spline with modulus; The root circle of said core shaped segment and canned paragraph cylindrical are the cone of smooth transition, and the angle between the center line of this cone outer round surface and core is 3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200486783U CN202479422U (en) | 2012-02-15 | 2012-02-15 | Precisely forging and forming die of gear shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200486783U CN202479422U (en) | 2012-02-15 | 2012-02-15 | Precisely forging and forming die of gear shaft |
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| Publication Number | Publication Date |
|---|---|
| CN202479422U true CN202479422U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200486783U Withdrawn - After Issue CN202479422U (en) | 2012-02-15 | 2012-02-15 | Precisely forging and forming die of gear shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527900A (en) * | 2012-02-15 | 2012-07-04 | 西北工业大学 | Precision forging die of gear shaft and molding method of precision forging die |
| CN112024633A (en) * | 2020-08-28 | 2020-12-04 | 黄巧燕 | Composite worm molding method and composite worm manufactured by same |
-
2012
- 2012-02-15 CN CN2012200486783U patent/CN202479422U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527900A (en) * | 2012-02-15 | 2012-07-04 | 西北工业大学 | Precision forging die of gear shaft and molding method of precision forging die |
| CN102527900B (en) * | 2012-02-15 | 2014-03-12 | 西北工业大学 | Precision forging die of gear shaft and molding method of precision forging die |
| CN112024633A (en) * | 2020-08-28 | 2020-12-04 | 黄巧燕 | Composite worm molding method and composite worm manufactured by same |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20140312 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20140312 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |