CN107335768A - The small gear ring radial direction wedge pressure mould of combination gear - Google Patents
The small gear ring radial direction wedge pressure mould of combination gear Download PDFInfo
- Publication number
- CN107335768A CN107335768A CN201611175638.4A CN201611175638A CN107335768A CN 107335768 A CN107335768 A CN 107335768A CN 201611175638 A CN201611175638 A CN 201611175638A CN 107335768 A CN107335768 A CN 107335768A
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- CN
- China
- Prior art keywords
- mould
- tooth
- inner sleeve
- core print
- print seat
- Prior art date
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a kind of small gear ring radial direction wedge pressure mould of combination gear, and it includes tooth mould, overcoat, inner sleeve, ring flat-plate, spring, mould base, elastic ring and the core print seat under pressure head, gear blank.The endoporus upper oral part of the inner sleeve is the taper hole of horn mouth upward, and shoulder is small end in upper axis of cone section outside overcoat top, and outer wall of inside race and interporal lacuna in overcoat coordinate composition to lean against the radial support structure of gear blank.The tooth mould upper end outer wall is the axis of cone coordinated with inner sleeve endoporus upper oral part taper hole, tooth mould and inner sleeve composition radial direction wedge pressure structure.Annular groove setting-in elastic ring at least is provided with by the high reserved radial clearance of small gear ring tooth, core print seat outer wall between core print seat and tooth the mould shrinking section, exposed elastic ring forms elastic expanding structure between core print seat and tooth mould.The tooth mould of the present invention leans against the inner sleeve and overcoat of phase fit, dramatically increases the bending strength of tooth mould, not only improves and improves extruding quality and production efficiency, is also beneficial to improve the service life of tooth mould.
Description
Technical field
The present invention relates to a kind of forging die structure design, in particular it relates to a kind of forging for cold extrusion gear
Mould, particularly a kind of radial direction wedge pressure mould for the small gear ring shaping of automobile combination gear.
Background technology
The combination gear configured in automobile gearbox is a kind of particularly compact cluster gear of structure.Combination gear configuration two
The gear ring only to differ in size, only several millimeters of axial spacing between the two, because without enough withdrawing distances when machining small gear ring,
Processing can not be realized with the cutting process of routine, prior art can only add welding forming technique to realize that batch is raw using shrink-fit structure
Production.The combination gear of such a welding forming technique productions except the accuracy of manufacture be not easy it is up to standard in addition to, welding thermal deformation and residual also be present
Stress problem, and production efficiency is also very low.Technological progress and equipment updating with modern manufacturing industry, cold closed-die forging technology
Industrial applications are obtained in the industry.Cold closed-die forging technology is a skill for making blank produce plastic deformation by mould extruding
Art, the technology are applied to that combination gear production is very suitable, and it can extrude by mould and realize the processing of two gear ring synchronous formings,
Above all the combination gear through cold-extrusion shaping still retains the original streamline of metal material, so the product strength of output
It is higher than prior art, and the accuracy of manufacture is high and production efficiency is high.But the diameter of combination gear only picks up centimetre or so, matches somebody with somebody
The cold extruding die volume of set is also little, and built-in tooth mould is architectural limitation, cross-sectional area can not possibly reserve it is excessive, along with cold-extruded
Pressing mold unit area carrying pressure is larger, and tooth mould is also easy to produce stress damage during cold extrusion.Tooth mould is the core component of cold extruding die,
Once tooth mould is damaged, whole cold extruding die cannot be used to produce, and its economic loss is very big.
The content of the invention
The problem of can not realizing combination gear small gear ring teeth portion shaping by stock removal present invention is generally directed to prior art, propose one
Using the small gear ring radial direction wedge pressure mould of combination gear of cold precision forging technology, the mould is radially exerted a force crowded kind by the realization of wedge pressure structure
Pressure, tooth mould reasonable stress, small gear ring shaping is accurate, steady quality, and production efficiency is high.
The present invention is achieved through the following technical solutions technical goal.
The small gear ring radial direction wedge pressure mould of combination gear, it includes tooth mould, overcoat, inner sleeve, the ring under pressure head, gear blank
Plate, spring, mould base, elastic ring and core print seat.The mould base horizontal on the table, inserts by interior respectively in shrinkage pool upward
The outwards sequentially coaxially core print seat of fit, tooth mould, inner sleeve and overcoat, by being vertically arranged between core print seat and the bottom face and mould base of overcoat
Spring-loaded, core print seat, tooth mould, inner sleeve and overcoat are equipped with radial direction evagination shoulder.The ring flat-plate location and installation in mould base upward
Corresponding end-faces on, be radially staggered connected ring flat-plate and form corresponding core print seat, inner sleeve and the up limitation of overcoat.On the core print seat
It is up that the ring flat-plate of end face location and installation directly limits tooth mould.It is theed improvement is that：The endoporus upper oral part of the inner sleeve is loudspeaker
Mouth taper hole upward, the outer shoulder in overcoat top be the axis of cone section of small end upward, outer wall of inside race and interporal lacuna cooperation composition in overcoat
Lean against the radial support structure of gear blank.The tooth mould upper end outer wall be with inner sleeve endoporus upper oral part taper hole coordinate the axis of cone, tooth mould
Match somebody with somebody with inner sleeve and be combined into displacement process to axial with the radial direction wedge pressure structure of radial displacement.The core print seat and tooth die sleeve
At least it is provided with annular groove by the high reserved radial clearance of small gear ring tooth, core print seat outer wall between conjunction section and is embedded in elastic ring, exposed bullet
Property circle forms elastic expanding structure between core print seat and tooth mould.
As further improvement project, 2~6mm of preset clearance between core print seat and tooth the mould shrinking section.
As further improvement project, the taper fit of the tooth mould and inner sleeve, 5 °~15 ° of its taper angle.
As further improvement project, the elastic ring cross section is circle, and material is rubber.
The present invention compared with prior art, has the positive effect that：
1st, tooth mould and inner sleeve taper fit directly constitute radial direction wedge pressure structure, and each tooth mould is inwardly synchronous, equivalent extruding, cold extrusion
The shaping of small gear ring teeth portion it is accurate；
2nd, tooth mould leans against phase fit inner sleeve and overcoat, dramatically increases the bending strength of tooth mould, and be advantageous to raising tooth mould uses the longevity
Life；
3rd, the disposable cold-extrusion shaping of the small gear ring of conjunction gear, steady quality, production efficiency are high.
Brief description of the drawings
Fig. 1 is structural profile illustration of the present invention, and figure displaying gear blank is in the finish-forging stage.
Fig. 2 is another working condition of Fig. 1, i.e., the state after pressure head rises after gear blank extrusion molding.
Fig. 3 is the stereogram of core print seat.
Fig. 4 is the schematic perspective view of inner sleeve.
Fig. 5 is the stereogram of tooth mould.
Embodiment
Below according to accompanying drawing and in conjunction with the embodiments, the invention will be further described.
The small gear ring radial direction wedge pressure mould of combination gear shown in Fig. 1 and Fig. 2, it includes the tooth under pressure head A, gear blank B
Mould 1, overcoat 2, inner sleeve 3, ring flat-plate 4, spring 5, mould base 6, elastic ring 7 and core print seat 8.The mould base 6 is the master of cold extruding die
Body component, is combined based on this.6 direct horizontal of mould base inserts respectively on press bed in shrinkage pool upward
The core print seat 8 of coaxial fit, tooth mould 1, inner sleeve 3 and overcoat 2 from inside to outside.The core print seat 8 is as shown in figure 3, the bottom of it and overcoat 2
By the elastic bearing of spring 5 being vertically arranged between face and mould base 6, can be axially moved up and down in tolerance band.In order to limit each part
Between axial movement, core print seat 8, tooth mould 1, inner sleeve 3 and overcoat 2 are equipped with radial direction evagination shoulder, corresponded to upward using mould base 6
End face location and installation ring flat-plate 4, every ring flat-plate 4 be all radially staggered form it is up to corresponding core print seat 8, inner sleeve 3 and overcoat 2
Limiting structure.It is up that tooth mould 1 is directly limited in the ring flat-plate 4 of the upper surface location and installation of core print seat 8.The present invention is in order to reach combination gear
Small gear ring disposably complete the purpose of cold radial extrusion pressing formation, the endoporus upper oral part of inner sleeve 3 as shown in Figure 4 is designed to loudspeaker by spy
The taper hole of mouth upward, the built-in upper end outer wall of tooth mould 1 are the axis of cone to match, the cone that this section of taper angle is 8 ° in the present embodiment
Axle directly coordinates with the endoporus upper oral part of inner sleeve 3 forms a kind of wedge pressure structure, and such a radial direction wedge pressure structure once occurs to axial
Motion, just produce radial compression or radial direction retracting action.The pressure that tooth mould 1 is born when implementing radial compression is maximum, and radially
Stress is concentrated mainly on the tooth ends of tooth mould 1, easily triggers the broken teeth accident of tooth mould 1.Due to being limited by mould structure space, tooth mould
1 cross section can not possibly be reserved very greatly, for this problem present invention on the basis of 1 original cross section of tooth mould, using one kind both
Tooth mould 1 can be strengthened, and do not influence the radial support structure of the motion of tooth mould 1, the structure is by interporal lacuna in the outer wall of inner sleeve 3 and overcoat 2
Coordinate, the outer shoulder in the top of overcoat 2 directly depends on pleodont base B during radial compression, the radial support of tooth mould 1 is consequently formed, so that significantly
The bending strength of tooth mould 1 is improved, can avoid that broken teeth accident occurs, be effectively increased the service life of tooth mould 1.Tooth mould 1 shown in Fig. 5 exists
With a certain amount of radial displacement during implementation radial compression, after the gear blank B demouldings of completion, it is necessary to ensure that tooth mould 1 is promptly and accurately
Ground returns to initial position, and the present invention at least reserves radial clearance between core print seat 8 and the shrinking section of tooth mould 1 by small gear ring tooth is high,
The small a height of 3.0mm of gear ring tooth of the present embodiment, therefore reserved radial clearance is also 3.0mm.In addition, the outer wall of core print seat 8 is provided with annular groove
Elastic ring 7 is embedded in, the cross section of elastic ring 7 of the present embodiment configuration is circle, and material is rubber.Elastic ring 7 is between core print seat 8 and tooth
Elastic ring 7 is pressurized when elastic expanding structure, i.e. radial compression is formed between mould 1, gear blank B be stripped when elastic ring 7 lose constraint and
Resilience, help tooth mould 1 to be moved outwards and keep coordinating with inner sleeve 3.
During present invention actual use, again toward being put into next gear blank to be processed in mould after the pressure head A of forcing press rises
B, descending pressure head A directly press gear blank B, the gear blank B compactings outer ring 2 of compression, tooth mould 1, core print seat 8, and the tooth mould 1 moved down is relatively interior
Set 3 radially inwardly moves, i.e., the increment of tooth mould 1 is implemented to shape small gear ring radial compression, and pressure head A is on after extruding
Rise, the overcoat 2 and core print seat 8 that original is pressurized rise to initial position in the presence of spring 5, while also promote gear blank B to rise, now tooth
Mould 1 also coordinates under the bounce effect of elastic ring 7 with inner sleeve 3.The tooth for having completed small gear ring cold-extrusion shaping is taken out from mould
Base B, the another that changes the outfit gear blank B to be processed, realized and produced in batches with this cycle operation.
Claims (4)
1. a kind of small gear ring radial direction wedge pressure mould of combination gear, it includes being located at pressure head（A）, gear blank（B）Under tooth mould（1）, it is outer
Set（2）, inner sleeve（3）, ring flat-plate（4）, spring（5）, mould base（6）, elastic ring（7）And core print seat（8）；The mould base（6）Horizontal
On the table, the core print seat of sequentially coaxially fit is inserted from inside to outside in shrinkage pool upward respectively（8）, tooth mould（1）, inner sleeve（3）
And overcoat（2）, core print seat（8）And overcoat（2）Bottom face and mould base（6）Between by the spring that is vertically arranged（5）Supporting, core print seat（8）、
Tooth mould（1）, inner sleeve（3）And overcoat（2）It is equipped with radial direction evagination shoulder；The ring flat-plate（4）Location and installation is in mould base（6）Upward
Corresponding end-faces on, be radially staggered connected ring flat-plate（4）Form corresponding core print seat（8）, inner sleeve（3）And overcoat（2）Up limit
System；The core print seat（8）The ring flat-plate of upper surface location and installation（4）Directly limit tooth mould（1）It is up；It is characterized in that：The inner sleeve
（3）Endoporus upper oral part be the taper hole of horn mouth upward, overcoat（2）Shoulder is the axis of cone section of small end upward outside top, inner sleeve（3）
Outer wall and overcoat（2）Interior interporal lacuna coordinates composition to lean against gear blank（B）Radial support structure；The tooth mould（1）Upper end outer wall is
With inner sleeve（3）The axis of cone that endoporus upper oral part taper hole coordinates, tooth mould（1）With inner sleeve（3）With being combined into displacement process to axial
In with radial displacement radial direction wedge pressure structure；The core print seat（8）With tooth mould（1）It is at least high pre- by small gear ring tooth between shrinking section
Stay radial clearance, core print seat（8）Outer wall is provided with annular groove setting-in elastic ring（7）, exposed elastic ring（7）Between core print seat（8）With
Tooth mould（1）Between form elastic expanding structure.
2. the small gear ring radial direction wedge pressure mould of combination gear according to claim 1, it is characterised in that：The core print seat（8）With tooth
Mould（1）2~6mm of preset clearance between shrinking section.
3. the small gear ring radial direction wedge pressure mould of combination gear according to claim 1, it is characterised in that：The tooth mould（1）With it is interior
Set（3）Taper fit, 5 °~15 ° of its taper angle.
4. the small gear ring radial direction wedge pressure mould of combination gear according to claim 1, it is characterised in that：The elastic ring（7）It is horizontal
Section is circle, and material is rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611175638.4A CN107335768B (en) | 2016-12-19 | 2016-12-19 | The small gear ring radial direction wedge pressure mould of combination gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611175638.4A CN107335768B (en) | 2016-12-19 | 2016-12-19 | The small gear ring radial direction wedge pressure mould of combination gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107335768A true CN107335768A (en) | 2017-11-10 |
| CN107335768B CN107335768B (en) | 2019-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611175638.4A Active CN107335768B (en) | 2016-12-19 | 2016-12-19 | The small gear ring radial direction wedge pressure mould of combination gear |
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| Country | Link |
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| CN (1) | CN107335768B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110162930A (en) * | 2019-06-13 | 2019-08-23 | 河北科技大学 | A kind of design method of straight spur gear cold extrusion shaping mould |
| CN113478188A (en) * | 2021-07-28 | 2021-10-08 | 重庆创精温锻成型有限公司 | Parking gear tooth profile lateral extrusion forming method |
Citations (7)
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|---|---|---|---|---|
| CN1820872A (en) * | 2006-03-22 | 2006-08-23 | 江苏太平洋精密锻造有限公司 | Back taper forming die for automobile transmission gear combination teeth |
| CN2897493Y (en) * | 2006-03-22 | 2007-05-09 | 江苏太平洋精密锻造有限公司 | Back taper forming die for automobile transmission gear combination teeth |
| JP2008194703A (en) * | 2007-02-08 | 2008-08-28 | Honda Motor Co Ltd | Gear forming method and device |
| CN201720378U (en) * | 2010-05-06 | 2011-01-26 | 重庆长风精化毛坯有限责任公司 | Mould for processing gear ring blank |
| CN202377462U (en) * | 2011-11-23 | 2012-08-15 | 十堰园钧工贸有限公司 | Hot finish forge tooth-form mould of combined tooth |
| CN102806297A (en) * | 2012-08-22 | 2012-12-05 | 太仓久信精密模具有限公司 | Novel hard alloy cold forging die for combined gear ring |
| CN206316303U (en) * | 2016-12-19 | 2017-07-11 | 江苏太平洋齿轮传动有限公司 | The small gear ring radial direction wedge pressure mould of combination gear |
-
2016
- 2016-12-19 CN CN201611175638.4A patent/CN107335768B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1820872A (en) * | 2006-03-22 | 2006-08-23 | 江苏太平洋精密锻造有限公司 | Back taper forming die for automobile transmission gear combination teeth |
| CN2897493Y (en) * | 2006-03-22 | 2007-05-09 | 江苏太平洋精密锻造有限公司 | Back taper forming die for automobile transmission gear combination teeth |
| JP2008194703A (en) * | 2007-02-08 | 2008-08-28 | Honda Motor Co Ltd | Gear forming method and device |
| CN201720378U (en) * | 2010-05-06 | 2011-01-26 | 重庆长风精化毛坯有限责任公司 | Mould for processing gear ring blank |
| CN202377462U (en) * | 2011-11-23 | 2012-08-15 | 十堰园钧工贸有限公司 | Hot finish forge tooth-form mould of combined tooth |
| CN102806297A (en) * | 2012-08-22 | 2012-12-05 | 太仓久信精密模具有限公司 | Novel hard alloy cold forging die for combined gear ring |
| CN206316303U (en) * | 2016-12-19 | 2017-07-11 | 江苏太平洋齿轮传动有限公司 | The small gear ring radial direction wedge pressure mould of combination gear |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110162930A (en) * | 2019-06-13 | 2019-08-23 | 河北科技大学 | A kind of design method of straight spur gear cold extrusion shaping mould |
| CN110162930B (en) * | 2019-06-13 | 2022-11-22 | 河北科技大学 | Design method of straight toothed spur gear cold extrusion shaping die |
| CN113478188A (en) * | 2021-07-28 | 2021-10-08 | 重庆创精温锻成型有限公司 | Parking gear tooth profile lateral extrusion forming method |
| CN113478188B (en) * | 2021-07-28 | 2022-07-29 | 重庆创精温锻成型有限公司 | Parking gear tooth profile lateral extrusion forming method |
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| Publication number | Publication date |
|---|---|
| CN107335768B (en) | 2019-04-12 |
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