CN110252931A - A kind of annular compound post rod mechanism - Google Patents
A kind of annular compound post rod mechanism Download PDFInfo
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- CN110252931A CN110252931A CN201910677189.0A CN201910677189A CN110252931A CN 110252931 A CN110252931 A CN 110252931A CN 201910677189 A CN201910677189 A CN 201910677189A CN 110252931 A CN110252931 A CN 110252931A
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- mandril
- forging
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- lower die
- post rod
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- 230000007246 mechanism Effects 0.000 title claims abstract description 43
- 150000001875 compounds Chemical class 0.000 title claims abstract description 19
- 238000005242 forging Methods 0.000 claims abstract description 95
- 238000000465 moulding Methods 0.000 claims abstract description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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
-
- 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
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
Abstract
The invention discloses a kind of annular compound post rod mechanisms, it is arranged in the molding mold of forging, ejection applied to forging, it is characterized in that, the post rod mechanism including being successively main mandril, T-type mandril, multiple step mandrils, annular mandril from the bottom to top, it is forging at the top of annular mandril, annular mandril is arranged in the molding lower die of forging, and step mandril is fixedly connected with the bottom of annular mandril.Beneficial effects of the present invention: many places ejection is realized by multiple step mandrils, the ejecting force that step mandril generates is homogenized further through annular mandril, and increase the contact surface of ejecting mechanism Yu piston head forging, it can guarantee that forging is gently ejected, demoulded, the hot forging deformation generated by ejection can be effectively reduced, the quality of forging is improved.
Description
Technical field
The present invention relates to a kind of post rod mechanism more particularly to a kind of annular compound post rod mechanisms.
Background technique
Forging steel piston can be divided into two major classes by structure type: single-piece piston and Split piston, Split piston is by piston head, work
Plug skirt two, which partly welds, to be composed.Usual piston head forging uses " open die forging, impressing forging ", blank heating temperature at 1200 DEG C or so,
Piston capillus bad machining allowance is big, corner R is big (general R >=3).Open type forging technology stock utilization is low, processing cost is high, visitor
Complain big in family.
The advanced forging technology of piston head is " closed die forging ", but forging corner R often occurs and relatively fill discontented, filling effect
Fruit is poor；For traditional cylinder ejector rod when ejecting forging, two sides force unbalance, forging occurs card mold phenomenon when being ejected, and leads
Cause production line stop；Due to there is fit clearance between cylinder ejector rod and mold, usually left in forging ejection position's
Boss or burr are unfavorable for the processing of later period blank；More distinct issues are that closed-die forging die life is low, and manufacturing cost is high,
High-volume automatic forging is not adapted to.
Conventional piston head forging mold ejection scheme is roughly divided into two kinds: the first, using the entire lower mold core of piston head as
A part of ejector pin of die set.When mandril works, entire lower mold core is ejected, and then lower mold core ejects forging.This structure design
Simply, easy for installation, (R >=3) of less demanding for corner R, drag chamber not deep piston head forging can hold when being ejected
Easy mold release has good applicability.But in forging process, since forging core stress is maximum, the forging that single mandril upper end is subject to
Pressure is big, since single mandril outer diameter is smaller, is easy to cause single mandril to deform, and it is unsmooth to eventually lead to mandril ejection, until blocking
Lower die can not be produced normally；
Such as the patent No. 201710174665.8, title are as follows: closed type single point press closed die forging mechanism discloses a kind of pressure
Machine, more particularly, to a kind of closed type single point press closed die forging mechanism.It mainly solves pressure present in the prior art
Each component of machine is all flat design, therefore its gap in die forging is larger, and die forging is more inaccurate, the part produced
The more low technical problem of accuracy.The present invention includes mould bases, and mould bases is equipped with cope plate and lower template, and cope plate is fixed with
Die shank, upper die shank are connected with forming punch by upper mold fixture nut, and forming punch includes formed punch ontology, formed punch ontology it is upper
Portion is equipped with positioning ring, and formed punch ontology lower end is equipped with convex block, and the head and root of convex block are designed with arc surface, set on formed punch ontology
There is bleed passage, lower template is equipped with lower die holder, wears in lower die holder and be connected to big mandril, big mandril top has by small mandril top
Shape mould, finishing die outside are equipped with lower die-sleeve, are fixed on the lower die seat outside lower die-sleeve by lower die fixture nut.It is adopted in this application
It is realized with a mandril, but there are discontinuity, easily-deformable problems.
Second, forging is directly ejected even more than thin mandril using two.The assembly of this mandril needs strict control
The length of mandril, in order to guarantee that thin mandril is unlikely to head into forging when ejecting forging, is usually pushed up since forced area is too small
The contact surface of bar and forging can remain the false boss of several certain altitudes, and this boss is unfavorable to the processing of subsequent finished product,
Client cannot receive, it is necessary to be machined out processing, increase cost.
Such as Patent No.: 201710333432.8, the flexible demoulding side of the entitled large scale special-shaped structural forging of closed die forging
Method discloses, and the stripper apparatus that this method uses includes at least 3 mandrils and pedestal, is equipped in the anvil tool of the die forging logical
Hole, the lower end fixation of the mandril is on the base and the upper end passes through the large size in the through-hole and mold cavity of anvil tool
The different bottom surfaces of polymorphic structure forging contact, and the quantity of the anvil tool through-hole is equal with the quantity of mandril, and the mandril is by upper
The rigid section for holding flexible compliant section and lower end to have rigidity is constituted；
For the demoulding for being adapted to larger part, ejected simultaneously using multiple mandrils；Therefore strict control mandril is just needed
Length etc., technique require high.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
Technical problem to be solved by the present invention lies in: how to solve existing ejecting mechanism and is not able to satisfy piston head forging
The problem of technique after ejection requires.
The present invention is to solve above-mentioned technical problem by the following technical programs: a kind of annular compound mandril machine of the present invention
Ejection in the molding mold of forging, applied to forging is arranged in structure, which is characterized in that the post rod mechanism include by down toward
On be successively main mandril, T-type mandril, multiple step mandrils, annular mandril, be forging at the top of annular mandril, annular mandril setting
In the molding lower die of forging, step mandril is fixedly connected with the bottom of annular mandril.
The present invention is generated step mandril further through annular mandril by realizing many places ejection by multiple step mandrils
Ejecting force is homogenized, and increases the contact surface of ejecting mechanism Yu piston head forging, can guarantee that forging gently ejects, is de-
Mould can effectively reduce the hot forging deformation generated by ejection, improve the quality of forging；Wherein T-type mandril can also make at T-type face
Ejecting force realize homogenization.
Preferably, the lower die includes lower mold core, lower die-sleeve, and lower mold core is fixed in lower die-sleeve, the top surface of lower mold core with
The inner surface of lower die-sleeve forms forming surface corresponding with forging.
Preferably, the mold further includes pedestal, lower mold backing plate, and lower mold backing plate is fixed on the base, and lower die-sleeve is fixed on
In lower mold backing plate, wherein pedestal, is equipped with the cavity for accommodating post rod mechanism in lower die-sleeve at lower mold backing plate.The lower mold core is fixed
In lower die-sleeve, lower die-sleeve and lower mold backing plate are compressed by the mould bases of tooling and fixing mould；
Preferably, the mold further includes lower die holder, ring shaped retainer member, and lower die holder is fixed on the base surface, and annular is fixed
Position part setting connects pedestal and lower die holder at pedestal and lower die holder joint face, and lower mold backing plate is fixed on lower die holder upper surface,
The main mandril is arranged in the cavity of pedestal, and the vertical bar of the T-type mandril is arranged in the cavity of lower die holder, the T-type
The plane of structure plate of mandril is limited in the upper surface of lower die holder.
Plant bottom case and lower die holder centralized positioning may be implemented in the ring shaped retainer member.
Mould inside is according to the link position situation with ejecting mechanism, chamber of the setting of adaptability for ejecting mechanism ejection
Body, the cavity can be it is one big, such as accommodating main mandril, the cavity at T-type mandril, be also possible to it is multiple small,
Such as accommodating the cavity of step mandril at lower mold core.
It preferably, further include multiple reset springs, reset spring is socketed in the outside of step mandril, and is limited in lower die
Between core and the step surface of step mandril.
The effect of reset spring is to facilitate the reset of step mandril, ejection process after ejecting mechanism ejects forging
In, reset spring is compressed, and after ejection, without ejecting force, spring has outside elastic force.
Preferably, the lower mold core is up-small and down-big stepped ramp type structure, and bottom is equipped with the depth for accommodating reset spring
Hole, the cavity inside the lower die-sleeve are up-small and down-big step cavity corresponding with lower mold core.Lower mold core can be with lower die
Set realizes the clamping at step, increases stability；Its deep hole is similarly stepped hole, and reset spring can be limited in the platform of deep hole
At terrace.
Preferably, the step mandril is down big up small step structure, and top and annular mandril interference fit connect.
Preferably, the step mandril is four, and uniform setting is on the same circumference.
Preferably, the annular mandril is the cylindrical structure of annular, and the thickness of the one end contacted with forging is greater than and step
The thickness of one end of mandril connection.Upper end thickness is big, and the gap between upper mold core inside is small, can reduce the boss of forging
Residual, lower end thickness is smaller, can release in order to push rod.
Preferably, the mold further includes upper mold core, and upper mold core is mounted on the top of forging, and when forging, upper mold core is under
Mold core constitutes forging space.
The main mandril is connect with hydraulic cylinder.It can guarantee that forging ejection is gentle in automatic forging, ejecting force, stroke
It is easy to adjust.
The present invention has the advantage that compared with prior art
(1) present invention realizes many places ejection by multiple step mandrils, generates step mandril further through annular mandril
Ejecting force is homogenized, and increases the contact surface of ejecting mechanism Yu piston head forging, can guarantee that forging gently ejects, is de-
Mould can effectively reduce the hot forging deformation generated by ejection, improve the quality of forging；Wherein T-type mandril can also make at T-type face
Ejecting force realize homogenization；
(2) by the way that unitary mould is divided into two modular structures, respectively lower mold core, lower die along mold corner by lower die
Set, the in this way region of stress concentration in elimination forging process, to significantly improve die life；
(3) effect of reset spring is to facilitate the reset of step mandril after ejecting mechanism ejects forging, ejected
Cheng Zhong, reset spring is compressed, and after ejection, without ejecting force, spring has outside elastic force；
(4) the upper end thickness of annular mandril is big, and the gap between upper mold core inside is small, can reduce the boss of forging
Residual, lower end thickness is smaller, can release in order to push rod；
(5) the main mandril is connect with hydraulic cylinder, can guarantee that forging ejection is gentle in automatic forging, ejecting force,
Traffic control system is convenient.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of annular compound post rod mechanism of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram using the piston head forging mold of the annular compound post rod mechanism；
Fig. 3 is the enlarged drawing in Fig. 2 at A；
Fig. 4 is the cross-sectional view of annular mandril；
Fig. 5 is the top view of annular mandril.
Figure label: pedestal 1, lower die holder 2, ring shaped retainer member 3, lower mold backing plate 4, lower die-sleeve 5, lower mold core 6, ejecting mechanism
7, main mandril 71, T-type mandril 72, step mandril 73, reset spring 731, annular mandril 74, upper mold core 8, piston head forging 9.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment one:
As shown in Figure 1, a kind of annular compound post rod mechanism in the present embodiment, post rod mechanism 7 includes being followed successively by from the bottom to top
Main mandril 71,72, four step mandrils 73 of T-type mandril, annular mandril 74 are piston head forging 9, annular at the top of annular mandril 74
Mandril 74 is arranged in lower mold core 6, annular mandril 74 and 6 clearance fit of lower mold core, the bottom of step mandril 73 and annular mandril 74
Portion is fixedly connected, and main mandril 71 is to connect with T-type mandril 72, and step mandril 73 and T-type mandril 72 connect.Main mandril
71 be cylindrical mandril, and T-type mandril 72 is the structure that cross section is T-type, and vertical bar can be cylindrical bar, can be circle at plane of structure
Hardened structure, the step mandril 73 are down big up small structure, and top and the annular interference fit of mandril 74 connect.
As shown in Figure 2 and Figure 3, using the piston head forging mold of the annular compound post rod mechanism, the mold is from the bottom to top
It successively include pedestal 1, lower die holder 2, ring shaped retainer member 3, lower mold backing plate 4, lower die-sleeve 5, lower mold core 6, ejecting mechanism 7, upper mold core
8；
Wherein, in the design of lower die, lower mold core 6 is fixed in lower die-sleeve 5, and the top surface of lower mold core 6 is interior with lower die-sleeve 5
Surface forms forming surface corresponding with piston head forging 9；By the way that unitary mould is divided into two moulds along mold corner by lower die
Block structure, respectively lower mold core 6, lower die-sleeve 5, the in this way region of stress concentration in elimination forging process, to significantly improve mould
Has the service life
The mould inside has the cavity for accommodating post rod mechanism 7, and cavity is to run through structure up and down；
In conjunction with shown in Fig. 4, Fig. 5, the step mandril 73 is four, uniform to be arranged on the same circumference, corresponding, institute
Annular mandril 74 is stated on the circumference of its thickness direction, if the annular mandril 74 is the cylindrical structure of annular there are four cavity,
And the thickness of the one end contacted with forging is greater than the thickness of the one end connecting with step mandril, it may be assumed that upper end thickness is big, with upper mold core
Gap between 6 inside is small, can reduce the residual of the boss of forging, and lower end thickness is smaller, can release in order to push rod.
Pedestal 1 is rotary table or square structure, the whole of the main mandril 71 of accommodated inside and the lower part of T-type mandril, bottom or is set
There is the design of adaptability.
Lower die holder 2 is fixed on 1 upper surface of pedestal, and the setting of ring shaped retainer member 3 connects at pedestal 1 and 2 joint face of lower die holder
Pedestal 1 and lower die holder 2 are connect, plant bottom case 1 and 2 centralized positioning of lower die holder may be implemented in the ring shaped retainer member 3.The T-type top
The vertical bar of bar 72 is arranged in lower die holder 2 and the cavity of bottom 1, and the plane of structure plate of the T-type mandril is limited in lower die holder 2
Upper surface, upwards when top, T-type mandril is moved upwards, and can be detached from lower die holder 2, when restoring to initial position, the meeting again of T-type mandril 72
It is overlapped on the top surface of lower die holder 2.
Lower mold backing plate 4 is fixed on 2 upper surface of lower die holder, and the cavity diameter inside lower mold backing plate 4 is slightly larger than T-type mandril 72
At maximum gauge, lower die-sleeve 5 is fixed in lower mold backing plate 4, and lower die-sleeve 5 and lower mold backing plate 4 pass through the mould of tooling and fixing mould
Frame compresses, and lower mold core 6 is fixed in lower die-sleeve 5, and the inner wall of the outer wall and lower die-sleeve 5 of lower mold core 6 is fastenedly connected, and the lower die
Core 6 is up-small and down-big convex stepped ramp type structure, is up-small and down-big cavity in the middle part of lower die-sleeve 5, and lower die-sleeve 5 and lower mold core 6 are logical
Setting step is crossed to be clamped；Lower mold core 6 be equipped with circumference array cavity, for accommodate step mandril 73 top or/and in
Portion
Wherein, pedestal 1, lower die holder 2, ring shaped retainer member 3, lower mold backing plate 4, lower die-sleeve 5, be equipped with receiving in lower mold core 6
The cavity of post rod mechanism 7.
Mould inside is according to the link position situation with ejecting mechanism, chamber of the setting of adaptability for ejecting mechanism ejection
Body, the cavity can be it is one big, such as accommodating main mandril 71, the cavity at T-type mandril 72, be also possible to multiple small
, such as accommodating the cavity of step mandril 73 at lower mold core 6.
The mold further includes upper mold core 8, and upper mold core 8 is mounted on the top of forging 9, when forging, upper mold core 8 and lower mold core
6 constitute forging space, and upper mold core 8 is compressed by the mould bases of tooling and fixing mould.
The present invention realizes the ejection of multiple positions by four step mandrils 73, further through annular mandril 74 by step mandril 73
The ejecting force of generation is homogenized, and increases the contact surface of ejecting mechanism Yu piston head forging 9, can guarantee that forging gently pushes up
Out, it demoulds, the hot forging deformation generated by ejection can be effectively reduced, improve the quality of forging；Wherein T-type mandril 72 can also make
Homogenization is realized in ejecting force at T-type face.
Embodiment two:
As shown in Figure 1, the difference between this embodiment and the first embodiment lies in: the present embodiment further includes multiple reset springs 731,
Reset spring 731 is socketed in the outside of step mandril 73, and the bottom of the lower mold core 6 is equipped with for accommodating reset spring 731
The cavity of deep hole, deep hole and upper part is similarly formed stepped hole, reset spring 731 and be limited at the deep hole of lower mold core 6 with
Between the step surface of step mandril 73, the reset condition of reset spring 731 can be mild compression or conventional sense.
The effect of reset spring 731 is to facilitate the reset of step mandril 73 after ejecting mechanism ejects forging, ejection
In the process, reset spring is compressed, and after ejection, without ejecting force, spring has outside elastic force.
It should be understood that
In above-described embodiment one and embodiment two, the main mandril 71 is connect with hydraulic cylinder.It can guarantee to forge in automation
Make middle forging ejection gently, ejecting force, Traffic control system are convenient.
Annular mandril 74 can be equivalent to the ring block split along lower mold core 6 along corner, use directly as mandril,
Therefore it is required that when forging, the upper surface of annular mandril 74 cooperates that collectively form the lower surface of piston head forging 9 corresponding with lower mold core 6
Forming surface, while annular mandril 74 is heat-treated, the intensive treatments such as nitriding, to enhance its intensity and wearability.
Mold assembling and installation process are as follows: frock making finishes, two first (this is sentenced for two) step mandrils
73 two reset springs 731 of assembly；Step mandril 73 is then passed through lower mold core 6, and it is corresponding to be pressed into annular mandril 74 (first preheating 350 DEG C)
Interference fit is realized in hole, and two mandrils (after step mandril 72 is combined with annular mandril 74) length requirement after assembly is consistent；Most
Lower mold core 6 and assembling parts are completed by drawing sequence afterwards, die craft equipment is then installed, adjusts upper and lower mold center and closing
After height, mold and press bench are compressed.
Ejection process: hydraulic cylinder stretches out, and main mandril 71 moves upwards, and then realizes T-type mandril 72, step mandril 73, ring
Shape mandril 74 moves upwards, and ejects piston head forging 9, ejection process, and reset spring 731 is compressed；Ejection terminates, and hydraulic cylinder is received
Contracting, main mandril 71 return to initial position, and reset spring 731 has the gravity of outside elastic force and a mandril itself, realize a
Mandril is restored to original position.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of annular compound post rod mechanism is arranged in the molding mold of forging, applied to the ejection of forging, feature exists
In the post rod mechanism including being successively main mandril, T-type mandril, multiple step mandrils, annular mandril, circular top from the bottom to top
It is forging at the top of bar, annular mandril is arranged in the molding lower die of forging, and step mandril is fixedly connected with the bottom of annular mandril.
2. a kind of annular compound post rod mechanism according to claim 1, which is characterized in that the lower die include lower mold core,
Lower die-sleeve, lower mold core are fixed in lower die-sleeve, and the top surface of lower mold core and the inner surface of lower die-sleeve form molding corresponding with forging
Face.
3. a kind of annular compound post rod mechanism according to claim 2, which is characterized in that the mold further include pedestal,
Lower mold backing plate, lower mold backing plate are fixed on the base, and lower die-sleeve is fixed in lower mold backing plate, wherein pedestal, lower mold backing plate, lower die
The cavity for accommodating post rod mechanism is equipped in set.
4. a kind of annular compound post rod mechanism according to claim 3, which is characterized in that the mold further include lower die holder,
Ring shaped retainer member, lower die holder are fixed on the base surface, and ring shaped retainer member setting connects at pedestal and lower die holder joint face
Pedestal and lower die holder, lower mold backing plate are fixed on lower die holder upper surface, and the main mandril is arranged in the cavity of pedestal, the T-type
The vertical bar of mandril is arranged in the cavity of lower die holder, and the plane of structure plate of the T-type mandril is limited in the upper surface of lower die holder.
5. a kind of annular compound post rod mechanism according to claim 2, which is characterized in that it further include multiple reset springs,
Reset spring is socketed in the outside of step mandril, and is limited between lower mold core and the step surface of step mandril.
6. a kind of annular compound post rod mechanism according to claim 5, which is characterized in that the lower mold core is up-small and down-big
Stepped ramp type structure, bottom is equipped with deep hole for accommodating reset spring, and the cavity inside the lower die-sleeve is and lower mold core pair
The up-small and down-big step cavity answered.
7. a kind of annular compound post rod mechanism according to claim 1, which is characterized in that the step mandril be it is lower it is big on
Small step structure, top and annular mandril interference fit connect.
8. a kind of annular compound post rod mechanism according to claim 1, which is characterized in that the step mandril is four,
Uniform setting is on the same circumference.
9. a kind of annular compound post rod mechanism according to claim 1, which is characterized in that the annular mandril is annular
Cylindrical structure, the thickness of the one end contacted with forging are greater than the thickness of the one end connecting with step mandril.
10. a kind of annular compound post rod mechanism according to claim 2, which is characterized in that the mold further includes upper mold
Core, upper mold core are mounted on the top of forging, and when forging, upper mold core and lower mold core constitute forging space.
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| CN201910677189.0A CN110252931A (en) | 2019-07-25 | 2019-07-25 | A kind of annular compound post rod mechanism |
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| CN201910677189.0A CN110252931A (en) | 2019-07-25 | 2019-07-25 | A kind of annular compound post rod mechanism |
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| CN210359086U (en) * | 2019-07-25 | 2020-04-21 | 安徽安簧机械股份有限公司 | Annular composite ejector rod mechanism |
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|---|---|---|---|---|
| JPH1177218A (en) * | 1997-08-29 | 1999-03-23 | Nissan Motor Co Ltd | Forging die device |
| JP2975926B1 (en) * | 1998-06-04 | 1999-11-10 | 株式会社メタルアート | Forming device for annular internal gear with chamfer |
| CN202461400U (en) * | 2012-03-27 | 2012-10-03 | 四川新筑精坯锻造有限公司 | Improved train wheel forming die with ejector structure |
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| CN107876680A (en) * | 2017-12-29 | 2018-04-06 | 江苏太平洋精锻科技股份有限公司 | The engage gear one step forming cold closed-die forging mould of back-off tooth form |
| CN109158521A (en) * | 2018-10-09 | 2019-01-08 | 江苏珀然轮毂有限公司 | The wheel rim forging equipment of aluminum-alloy wheel |
| CN210359086U (en) * | 2019-07-25 | 2020-04-21 | 安徽安簧机械股份有限公司 | Annular composite ejector rod mechanism |
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