CN207887810U - Cold-extrusion shaping mould of the straight bevel gear with back pressure - Google Patents
Cold-extrusion shaping mould of the straight bevel gear with back pressure Download PDFInfo
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- CN207887810U CN207887810U CN201721891441.0U CN201721891441U CN207887810U CN 207887810 U CN207887810 U CN 207887810U CN 201721891441 U CN201721891441 U CN 201721891441U CN 207887810 U CN207887810 U CN 207887810U
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Abstract
A kind of the utility model discloses straight bevel gears cold-extrusion shaping mould with back pressure, it is separated into upper die and lower die using die cavity die joint as boundary.The lower die includes mould bottom, lower push rod, mandrel, spring, cushion block, pedestal, pressing plate, fore-set, lower die pedestal, circle stress and lower die.The fore-set is located at one section in cushion block inner cavity, equipped with the back-pressure structure for discharging reaction force after the compression being made of spring and pressing plate to lower die upwards.This is simple and reasonable for structure, is easy to make.In actual use, when upper mold presses to lower die, the reaction force that lower die is formed is applied directly on the workpiece in mould, which makes full use of discarded energy, is conducive to extrusion molding.Since workpiece not only bears forging force in die cavity, but also back pressure is born, Double Pressures forming quality is good, and production efficiency is high.It is not required to additionally increase forging force in the utility model actual use, impact of the forging force to lower die is reduced as far as possible, to promote Service Life of Forging Die.
Description
Technical field
The utility model is related to a kind of forging dies, in particular, the utility model is related to a kind of cold-extrusion shaping moulds, especially
It is a kind of to be used for cold-extrusion shaping mould of the precision forging straight bevel gear with back pressure.
Background technology
Axle shaft gear in automobile differential is a kind of straight bevel gear, since the gear in differential mechanism directly turn round by transmission
Square, so belonging to key components and parts, quality directly determines differential drive quality.In order to further increase product manufacturing matter
Amount, the industry mainly take technical improvements in terms of following two, first, slab selection high-alloy steel makes, second is that using cold
Study on precision forging technology realizes production.Under prior art conditions, the precondition for implementing this two technical measures is to improve cold essence
Design of forging die is horizontal, the reason for this is that the high-alloy steel intensity selected is high, hardness is firmly many compared with ordinary steel after spheroidizing, forging and stamping
When metal fluidity it is poor, resistance of deformation is big, and the forging force only in reasonable value range could be produced effectively.Common sense it is found that
Forging force and hammer die lif are conflicts, and the forging force only in reasonable value range and forming quality are proportional.It is no
Then, the forging force of increasing easily causes the damage of forging die.However fine to control, the forging qualification rate of the prior art only has 80%
Left and right, and hammer die lif only ten thousand or so, this horizontal forging die still have larger gap with industry expectation.Now, the industry
Straight bevel gear forging die structure, be positive pressing structure, which only leans on the forging force forming that upper mold applies.Due to
Prior art measure implementation result does not protrude, and the expected value of the industry is still not achieved in product shaping quality.
Invention content
When the utility model makees cold-extrusion shaping mainly for the forging die of the prior art, only upper mold is leaned on to apply forging force not
Foot proposes a kind of cold extrusion of the straight bevel gear with back pressure simple in structure, pressure is reasonable, forming quality is good, hammer die lif is grown
Finishing die.
The utility model is achieved through the following technical solutions technical goal.
Cold-extrusion shaping mould of the straight bevel gear with back pressure, it is divided into upper die and lower die using die cavity die joint as boundary.It is described
Lower die includes mould bottom, lower push rod, mandrel, spring, cushion block, pedestal, pressing plate, fore-set, lower die pedestal, circle stress and lower die.It is described
Lower die is die joint towards upper surface, which is equipped with open matrix cavity upward between two parties, by the lower die endoporus of circle stress sheath
In be equipped with lower push rod, vertical lower push rod extends in lower die pedestal endoporus, and lower push rod is by being placed in lower die pedestal and cushion block endoporus
In fore-set bearing.The fore-set is cylindrical shaft, and the fore-set branch being vertically arranged is on pedestal upper surface.The pedestal is matched with mould bottom endoporus
It closes, mandrel is equipped in axially extending bore placed in the middle, constitute mandrel, fore-set and the coaxial phase roof construction of lower push rod；It thes improvement is that：Institute
State one section that fore-set is located in cushion block inner cavity, equipped with after the compression being made of spring and pressing plate upwards to lower die discharge reaction force
Back-pressure structure.
Scheme as a further improvement, the spring are butterfly spring.
Scheme as a further improvement, the pressing plate endoporus and fore-set clearance fit.
The utility model compared with prior art, has the positive effect that：
1, preset release is reasonable using the back-pressure structure of power in lower die, is easy to make；
2, when upper mold presses to lower die, the reaction force that lower die is formed is applied directly on workpiece, which makes full use of
Energy is conducive to excellent suitability for press forming；
3, the utility model is under forging force and back pressure collective effect, and the workpiece voltage stabilizing to press in die cavity is abundant, morphoplasm
It measures, production efficiency is high；
4, the forging of forging same size need not increase forging force, be conducive to improve Service Life of Forging Die.
Description of the drawings
Fig. 1 is the utility model structural profile illustration.
Specific implementation mode
Below according to attached drawing and in conjunction with the embodiments, the utility model is described in further detail.
Attached drawing is a kind of cold-extrusion shaping mould of the straight bevel gear with back pressure, it is a kind of vertical forging die, and the mould is with mould
Chamber die joint is that boundary is separated into upper die and lower die.The lower die includes mould bottom 1, lower push rod 2, mandrel 3, spring 4, cushion block 5, pedestal
6, pressing plate 7, fore-set 8, lower die pedestal 9, circle stress 10 and lower die 11.The end face of the lower die 11 upward is die joint, the end face
It is placed in the middle to be equipped with open matrix cavity upward, by being equipped with lower push rod 2, vertical lower push rod in 11 endoporus of lower die of 10 sheath of circle stress
2 extend in 9 endoporus of lower die pedestal, and lower push rod is supported by the fore-set 8 being placed in 5 endoporus of lower die pedestal 9 and cushion block.The fore-set
8 be a kind of cylindrical shaft, and the fore-set being vertically arranged 8 is on 6 upper surface of pedestal.The pedestal 6 and 1 inner hole of mould bottom, axis placed in the middle
It is equipped with mandrel 3 into through-hole, thus constitutes mandrel 3,2 coaxial phase roof construction of fore-set 8 and lower push rod.The fore-set 8 is located at cushion block 5
One section in inner cavity, equipped with the back pressure knot for discharging reaction force after the compression being made of spring 4 and pressing plate 7 to lower die 11 upwards
Structure.Since the axial dimension of cushion block 5 is limited, the spring 4 of the present embodiment configuration selects the butterfly that axial arrangement size is short, elastic force is big
Shape spring.In order to reduce the frictional resistance of pressing plate 7 and fore-set 8, the cooperation between two pieces is gap-matched, it is ensured that 8 phase of fore-set
It is free to slide to pressing plate 7.
The utility model is the Curve guide impeller on the basis of lower die structure of the prior art, and primary structure innovation is embodied in down
The back-pressure structure of release reaction force is prefixed in mould, this is simple and reasonable, is easy to make.In actual use, when upper mold pair
When lower die presses, the reaction force that lower die is formed is applied directly on the workpiece in mould, which makes full use of discarded energy, has
Conducive to extrusion molding.Since workpiece not only bears forging force in die cavity, but also back pressure is born, Double Pressures forming quality is good, production
It is efficient.When the utility model practical application, forging force need not additionally be increased by forging the forging of same size, can close hydraulic pressure
The anti-of machine squeezes function.Since forging force does not increase, be conducive to improve Service Life of Forging Die, the present embodiment hammer die lif is up to 30,000.
Claims (3)
1. a kind of cold-extrusion shaping mould of straight bevel gear with back pressure, it is divided into upper die and lower die using die cavity die joint as boundary；Institute
It includes mould bottom to state lower die（1）, lower push rod（2）, mandrel（3）, spring（4）, cushion block（5）, pedestal（6）, pressing plate（7）, fore-set（8）、
Lower die pedestal（9）, circle stress（10）And lower die（11）；The lower die（11）It is die joint towards upper surface, which sets between two parties
There is open matrix cavity upward, by circle stress（10）The lower die of sheath（11）Lower push rod is equipped in endoporus（2）, vertical lower push rod
（2）Extend to lower die pedestal（9）In endoporus, lower push rod（2）By being placed in lower die pedestal（9）And cushion block（5）Fore-set in endoporus（8）
Bearing；The fore-set（8）For cylindrical shaft, the fore-set being vertically arranged（8）Branch is in pedestal（6）On upper surface；The pedestal（6）With mould bottom
（1）Inner hole is equipped with mandrel in axially extending bore placed in the middle（3）, constitute mandrel（3）, fore-set（8）And lower push rod（2）Coaxial phase
Roof construction；It is characterized in that：The fore-set（8）Positioned at cushion block（5）It one section in inner cavity, is equipped with by spring（4）And pressing plate（7）Group
At compression after upwards to lower die（11）Discharge the back-pressure structure of reaction force.
2. cold-extrusion shaping mould of the straight bevel gear according to claim 1 with back pressure, it is characterised in that：The spring
（4）For butterfly spring.
3. cold-extrusion shaping mould of the straight bevel gear according to claim 1 with back pressure, it is characterised in that：The pressing plate
（7）Endoporus and fore-set（8）Clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721891441.0U CN207887810U (en) | 2017-12-29 | 2017-12-29 | Cold-extrusion shaping mould of the straight bevel gear with back pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721891441.0U CN207887810U (en) | 2017-12-29 | 2017-12-29 | Cold-extrusion shaping mould of the straight bevel gear with back pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207887810U true CN207887810U (en) | 2018-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721891441.0U Active CN207887810U (en) | 2017-12-29 | 2017-12-29 | Cold-extrusion shaping mould of the straight bevel gear with back pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN207887810U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900271A (en) * | 2017-12-29 | 2018-04-13 | 江苏飞船股份有限公司 | Cold-extrusion shaping mould of the straight bevel gear with back pressure |
| WO2021238307A1 (en) * | 2020-05-24 | 2021-12-02 | 江苏飞船股份有限公司 | Precision forming die for warm forging of straight bevel gear |
-
2017
- 2017-12-29 CN CN201721891441.0U patent/CN207887810U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900271A (en) * | 2017-12-29 | 2018-04-13 | 江苏飞船股份有限公司 | Cold-extrusion shaping mould of the straight bevel gear with back pressure |
| WO2021238307A1 (en) * | 2020-05-24 | 2021-12-02 | 江苏飞船股份有限公司 | Precision forming die for warm forging of straight bevel gear |
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