CN107335768B - 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
- CN107335768B CN107335768B CN201611175638.4A CN201611175638A CN107335768B CN 107335768 B CN107335768 B CN 107335768B CN 201611175638 A CN201611175638 A CN 201611175638A CN 107335768 B CN107335768 B CN 107335768B
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- China
- Prior art keywords
- mould
- core print
- print seat
- tooth
- tooth mould
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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
Abstract
The invention discloses a kind of small gear ring radial direction wedge pressure moulds of combination gear, it includes tooth mould, housing, inner sleeve, ring flat-plate, spring, mould pedestal, elastic ring and the core print seat under pressure head, gear blank.The inner hole 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 housing top, and outer wall of inside race leans against the radial support structure of gear blank with housing inner hole clearance fit composition.Tooth mould upper end outer wall is the axis of cone with the cooperation of inner sleeve inner hole upper oral part taper hole, tooth mould and inner sleeve group radially wedge pressure structure.Radial clearance at least is reserved by small gear ring tooth height between the core print seat and tooth mould shrinking section, core print seat outer wall is equipped with annular groove and is embedded in elastic ring, and exposed elastic ring forms elastic expanding structure between core print seat and tooth mould.Tooth mould of the invention leans against the inner sleeve and housing of phase fitting, 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 designs of forging die structure, in particular it relates to a kind of forging for cold extrusion gear
Mould, especially a kind of radial wedge pressure mould for the small gear ring forming of automobile combination gear.
Background technique
The combination gear configured in automobile gearbox is a kind of cluster gear that structure is particularly compact.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,
It can not achieve processing with conventional cutting process, the prior art can only add welding forming technique to realize that batch is raw using shrink-fit structure
It produces.The combination gear of such welding forming technique production is not easy up to standard outer except the accuracy of manufacture, and there is also weld thermal deformation and residual
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 one and squeezes the skill for making blank generate plastic deformation by mold
Art, it is very suitable that the technical application to combination gear produces, it can be squeezed by mold realizes two gear ring synchronous forming processing,
Most importantly 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 the prior art, and accuracy of manufacture height and high production efficiency.But the diameter of combination gear only picks up centimetre or so, matches
The cold extruding die volume of set is also little, and built-in tooth mould is architectural limitation, cross-sectional area can not reserve it is excessive, add cold-extruded
Pressing mold unit area carries that pressure is larger, and tooth mould is also easy to produce stress damage when cold extrusion.Tooth mould is the core component of cold extruding die,
Once tooth mould is damaged, entire cold extruding die cannot be used to produce, and economic loss is very big.
Summary of the invention
The problem of cannot achieve combination gear small gear ring teeth portion shaping by stock removal present invention is generally directed to the prior art, proposes one
Kind applies the small gear ring radial direction wedge pressure mould of combination gear of cold precision forging technology, which realizes that radial exert a force is squeezed by wedge pressure structure
Pressure, tooth mould reasonable stress, small gear ring forming is accurate, quality is stablized, high production efficiency.
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, the housing, inner sleeve, ring under pressure head, gear blank
Plate, spring, mould pedestal, elastic ring and core print seat.The mould pedestal horizontal on the table, is inserted respectively in shrinkage pool upward by interior
The sequentially coaxially core print seat of fitting, tooth mould, inner sleeve and housing outward, by being vertically arranged between core print seat and the bottom face and mould pedestal of housing
Spring-loaded, core print seat, tooth mould, inner sleeve and housing are equipped with radial evagination shoulder.The ring flat-plate location and installation mould pedestal upward
Corresponding end-faces on, be radially staggered connected ring flat-plate and constitute corresponding core print seat, inner sleeve and the limitation of housing uplink.On the core print seat
The ring flat-plate of end face location and installation directly limits tooth mould uplink.It is theed improvement is that: the inner hole upper oral part of the inner sleeve is loudspeaker
Mouth taper hole upward, the outer shoulder in housing top are the axis of cone section of small end upward, outer wall of inside race and housing inner hole clearance fit composition
Lean against the radial support structure of gear blank.Tooth mould upper end outer wall is the axis of cone with the cooperation of inner sleeve inner hole upper oral part taper hole, tooth mould
Match the radial wedge pressure structure being combined into displacement process to axial with radial displacement with inner sleeve.The core print seat and tooth die sleeve
It closes and at least reserves radial clearance by small gear ring tooth height between section, core print seat outer wall is equipped with annular groove and is embedded in elastic ring, exposed bullet
Property circle elastic expanding structure is formed between core print seat and tooth mould.
As the scheme of further improvement, 2~6mm of preset clearance between the core print seat and tooth mould shrinking section.
As be further improved scheme, the taper fit of the tooth mould and inner sleeve, 5 °~15 ° of taper angle.
As the scheme of further improvement, the elastic ring cross section is circle, and material is rubber.
Compared with prior art, the present invention having the positive effect that:
1, tooth mould and inner sleeve taper fit directly constitute radial wedge pressure structure, and each tooth mould is inwardly synchronous, equivalent squeezes, cold
The small gear ring teeth portion forming squeezed is accurate；
2, tooth mould leans against phase fitting inner sleeve and housing, dramatically increases the bending strength of tooth mould, is conducive to improve making for tooth mould
Use the service life；
3, the disposable cold-extrusion shaping of the small gear ring of conjunction gear, quality are stablized, high production efficiency.
Detailed description of the invention
Fig. 1 is structure of the invention diagrammatic cross-section, which shows that 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 perspective view of core print seat.
Fig. 4 is the stereoscopic schematic diagram of inner sleeve.
Fig. 5 is the perspective view of tooth mould.
Specific embodiment
Below according to attached drawing and in conjunction with the embodiments, the invention will be further described.
Fig. 1 and the small gear ring radial direction wedge pressure mould of combination gear shown in Fig. 2, it includes the tooth under pressure head A, gear blank B
Mould 1, housing 2, inner sleeve 3, ring flat-plate 4, spring 5, mould pedestal 6, elastic ring 7 and core print seat 8.The mould pedestal 6 is the master of cold extruding die
Body component, is composed based on this.The direct horizontal of mould pedestal 6 inserts in shrinkage pool upward respectively on press bed
The core print seat 8 of coaxial fitting, tooth mould 1, inner sleeve 3 and housing 2 from inside to outside.The core print seat 8 as shown in figure 3, it and housing 2 bottom end
By 5 elastic bearing of spring being vertically arranged between face and mould pedestal 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 housing 2 are equipped with radial evagination shoulder, are corresponded to upward using mould pedestal 6
End face location and installation ring flat-plate 4, every ring flat-plate 4 be all radially staggered composition to 2 uplink of corresponding core print seat 8, inner sleeve 3 and housing
Limiting structure.1 uplink of tooth mould is directly limited in the ring flat-plate 4 of 8 upper surface location and installation of core print seat.The present invention is in order to reach combination gear
Small gear ring disposably complete the purpose of cold radial extrusion pressing formation, the inner hole upper oral part of inner sleeve 3 as shown in Figure 4 is designed to loudspeaker by spy
The taper hole of mouth upward, built-in 1 upper end outer wall of tooth mould are the axis of cone to match, the cone that this section of taper angle is 8 ° in the present embodiment
Axis directly constitutes a kind of wedge pressure structure with the cooperation of 3 inner hole upper oral part of inner sleeve, and such radial direction wedge pressure structure once occurs to axial
Movement just generates radial compression or radial retracting action.It is maximum and radial to implement the pressure that tooth mould 1 is born when radial compression
Stress is concentrated mainly on the tooth ends of tooth mould 1,1 broken teeth accident of Yi Yinfa tooth mould.Due to being limited by mould structure space, tooth mould
1 cross section can not be reserved very greatly, and the present invention is on the basis of tooth 1 original cross section of mould in response to this problem, both using one kind
Tooth mould 1 can be strengthened, and do not influence the radial support structure of the movement of tooth mould 1, the structure is by interporal lacuna in 3 outer wall of inner sleeve and housing 2
Cooperation, shoulder directly depends on pleodont base B outside 2 top of housing when radial compression, the radial support of tooth mould 1 is consequently formed, thus significantly
1 bending strength of tooth mould is improved, can avoid that broken teeth accident occurs, effectively increase the service life of tooth mould 1.Tooth mould 1 shown in fig. 5 exists
With a certain amount of radial displacement when implementation radial compression, after the gear blank B demoulding 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 by small gear ring tooth height between 1 shrinking section of core print seat 8 and tooth mould,
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, 8 outer wall of core print seat is equipped with annular groove
It is embedded in elastic ring 7,7 cross section of elastic ring 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 forming elastic expanding structure, i.e. radial compression between mould 1, when gear blank B is demoulded elastic ring 7 lose constraint and
Rebound helps tooth mould 1 to be moved outwards and keeps cooperating with inner sleeve 3.
The present invention in actual use, is put into next gear blank to be processed after the pressure head A of press machine rises in mould again
B, the pressure head A of downlink directly press gear blank B, and the gear blank B of compression is compacted outer ring 2, tooth mould 1, core print seat 8, the tooth mould 1 moved down relatively in
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
It rises, the housing 2 and core print seat 8 that original is pressurized rise to initial position under the action of spring 5, while also gear blank B being pushed to rise, at this time tooth
Mould 1 also cooperates under the bounce effect of elastic ring 7 with inner sleeve 3.The tooth that small gear ring cold-extrusion shaping is completed is taken out from mould
Base B, the another that changes the outfit gear blank B to be processed are realized with this cycle operation and are produced in batches.
Claims (4)
1. a kind of small gear ring radial direction wedge pressure mould of combination gear, it includes tooth mould (1) under pressure head (A), gear blank (B), outer
Cover (2), inner sleeve (3), ring flat-plate (4), spring (5), mould pedestal (6), elastic ring (7) and core print seat (8)；Mould pedestal (6) horizontal
On the table, the core print seat (8), tooth mould (1), inner sleeve (3) of sequentially coaxially fitting are inserted from inside to outside in shrinkage pool upward respectively
With housing (2), supported between core print seat (8) and the bottom face and mould pedestal (6) of housing (2) by the spring (5) being vertically arranged, core print seat (8),
Tooth mould (1), inner sleeve (3) and housing (2) are equipped with radial evagination shoulder；Ring flat-plate (4) location and installation mould pedestal (6) upward
Corresponding end-faces on, be radially staggered connected ring flat-plate (4) and constitute corresponding core print seat (8), inner sleeve (3) and housing (2) uplink and limit
Structure processed；The ring flat-plate (4) of core print seat (8) upper surface location and installation directly limits tooth mould (1) uplink；It is characterized by: described
The inner hole upper oral part of inner sleeve (3) is the taper hole of horn mouth upward, and shoulder is the axis of cone section of small end upward outside housing (2) top, interior
Set (3) outer wall and housing (2) inner hole clearance fit composition lean against the radial support structure of gear blank (B)；Outside tooth mould (1) upper end
Wall is the axis of cone with the cooperation of inner sleeve (3) inner hole upper oral part taper hole, and tooth mould (1) matches to be combined into inner sleeve (3) to be displaced to axial
In the process with the radial wedge pressure structure of radial displacement；Small gear ring tooth is at least pressed between the core print seat (8) and tooth mould (1) shrinking section
The reserved radial clearance of height, core print seat (8) outer wall are equipped with annular groove and are embedded in elastic ring (7), and exposed elastic ring (7) is between core print seat
(8) elastic expanding structure is formed between tooth mould (1).
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) and tooth
2~6mm of preset clearance between mould (1) 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
The taper fit of set (3), 5 °~15 ° of 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) 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 CN107335768A (en) | 2017-11-10 |
| CN107335768B true CN107335768B (en) | 2019-04-12 |
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| 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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 | Inverse conical forming mould for automobile gearbox gear combining tooth |
| CN2897493Y (en) * | 2006-03-22 | 2007-05-09 | 江苏太平洋精密锻造有限公司 | Gear-combined and cone-off forming mould of variator for automobile |
| 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 | Inverse conical forming mould for automobile gearbox gear combining tooth |
| CN2897493Y (en) * | 2006-03-22 | 2007-05-09 | 江苏太平洋精密锻造有限公司 | Gear-combined and cone-off forming mould of variator for automobile |
| 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 |
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| CN107335768A (en) | 2017-11-10 |
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