CN109663912A - A kind of powder dry pressing molding mould and workpiece manufacturing method with elastic material device - Google Patents
A kind of powder dry pressing molding mould and workpiece manufacturing method with elastic material device Download PDFInfo
- Publication number
- CN109663912A CN109663912A CN201910094535.2A CN201910094535A CN109663912A CN 109663912 A CN109663912 A CN 109663912A CN 201910094535 A CN201910094535 A CN 201910094535A CN 109663912 A CN109663912 A CN 109663912A
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- CN
- China
- Prior art keywords
- die cavity
- powder
- formed punch
- raw material
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
Abstract
This application involves a kind of powder dry pressing molding moulds with elastic material device, comprising: die wall is used to form die cavity；Formed punch is arranged in the die cavity, with core model and the core model housing being set in outside the core model；The formed punch is arranged in die cavity and can move powder raw material preset in compression die cavity in the die cavity；Elastomer is set on the formed punch, which generates elastic deformation when the formed punch compresses powder raw material；Die cavity seat, setting provide support force when the formed punch compresses the powder raw material in the die cavity；Structure is simpler for the relatively existing powder dry pressing die set of the application, and manufacture, use cost are lower.
Description
Technical field
The invention belongs to machine casting fields, in particular to the improvement of powder moulding mold.
Background technique
Powder dry pressing is the most fast, economical for manufacturing the workpiece such as automobile gearbox gear, water pump turbine and Liquid valve
Scheme.And the applicable raw material powder of powder dry pressing includes that steel, alloy material, ceramic material can be with the sides of powder
Formula is made.Determine the basic principle is that former material feed powder passes through addition high score subclass bonding agent and places to press in mold again
Type formed embryo material, ingredient by heating remove bonding agent after, then with lower than material melting point temperature make powder fusion it is blocking to
Form one integral piece.In the workpiece for the complex geometry section that production such as gear class workpiece has thickness different, in dry-pressing production
It must assure that powder energy uniform-compression in the process, so that the stress inside powder raw material uniformly just can guarantee the quality of workpiece.It is no
Then if powder discontinuity causes its internal stress distribution unevenly to may result in finished work-piece during dry-pressing
It is off quality, the service life, wearability, in terms of cannot reach satisfactory requirement.
Powder raw material is made to be under pressure during dry-pressing uniformly to solve the above-mentioned problems, the prior art uses two
Kind of scheme solves the above problems the first scheme are as follows: the multiple independent formed punches of design, multiple throwing can be according to the different section of workpiece
Pressing mold is carried out by the accurate linkage of mold.
The annular workpieces stamper architecture shown referring to Fig.1 it include upper punch 11, die wall 14, the first low punch 15, second
Low punch mandrel 16, mandrel 12 accurately adjust stroke so that the powder raw material exists during pressing mold according to the section 17 of workpiece
Stress is uniform when being pressurized in pressing mold.
Second scheme are as follows: floating moulding press can provide independent force direction up and down, and mating mold design is also reachable
At.The patent for being CN207447247 referring to patent publication No., the setting such as core mould, core model inner sleeve, core model housing, lower die exist
On pedestal, wherein for floating structure, it is arranged on elastic support pedestal.
Although obvious above two scheme can be up to so that powder raw material makes its internal stress during compression
Better effect is uniformly obtained, but the structure of above two scheme mold is all very complicated, manufacturing cost and use cost is all very high.
Summary of the invention
The application proposes a kind of powder dry pressing molding mould with elastic material device to solve above-mentioned technical problem,
Make the internal stress of powder raw material elastic material during compression equal using the method for elastomeric element preset in mold
It is even.
The dry pressing molding mould includes:
Die wall is used to form die cavity；
Formed punch is arranged in the die cavity, with core model and the core model housing being set in outside the core model；
The formed punch is arranged in die cavity and can move powder raw material preset in compression die cavity in the die cavity；
Elastomer is set on the formed punch, which generates elastic deformation when the formed punch compresses powder raw material；
Die cavity seat, setting provide support force when the formed punch compresses the powder raw material in the die cavity.
In a preferred embodiment, the end that the core model and core model housing compress the powder raw material is mutually aligned, institute
State the end that elastomer protrudes from the core model set and core model.
In a preferred embodiment, the cross section of the elastomer is less than the cross section of the core model.
In a preferred embodiment, the die cavity seat and the die cavity seat of die wall mating include the core into the die cavity
The stop bit part of column and stem peripheral side.
In a preferred embodiment, the elastomer includes rubber, polyurethane, silica gel and its composite material.
The application also provides a kind of side for utilizing dry pressing molding mould manufacture workpiece corresponding with above-mentioned dry pressing molding mould
Method is specifically a kind of manufacturing method of the dry-pressing formed workpiece of powder, comprising steps of
Die cavity seat opening die cavity is removed from die wall, and powder raw material is injected into the die cavity；
The die cavity seat is reinstalled to cavity closed on the die wall；
Shape occurs for powder raw material described in the drift in mobile die cavity, elastomer during compression above formed punch
Become so that the powder raw material is compressed into powder raw material uniform internal stress during embryo material；
Die cavity seat is removed from die wall opens the die cavity；
The embryo material of compression forming is removed die cavity by the formed punch in the mobile die cavity.
In a preferred embodiment, when the step " powder raw material described in the drift in mobile die cavity " carries out,
The position of the die cavity seat does not change actively also not to be changed because of the compressed action of the formed punch, and die cavity seat is compressed powder
Raw material provides support force.
In a preferred embodiment, the step " remove die cavity seat from die wall and open the die cavity " and step are " mobile
The embryo material of compression forming is removed die cavity by formed punch in the die cavity " in the step of removing die cavity seat and embryo material is removed into die cavity can
Embryo material is pushed by movable punching head and is allowed embryo material to push the die cavity seat freely movably while being carried out.
In a preferred embodiment, described to need to remove press machine before the movement formed punch in advance to the die cavity seat
Pressure.
In a preferred embodiment, the embryo material is removed the rear formed punch and retracts in die cavity.
Technical scheme uses the elastomer being arranged in pressing mold that pressing mold elastic material in compression is received
Uniformly its internal stress distribution is uniform accordingly for the pressure arrived, can guarantee the rigidity, wearability and mechanical strength of workpiece.On
It states the progress of technical solution compared with the prior art and is that stamper architecture significantly simplifies, do not need the association of floating punch and multiple punch
Make to can reach identical technical effect, the manufacturing cost and use cost of pressing mold all substantially reduce compared with the prior art.
Detailed description of the invention
Fig. 1 is to have multiple punch powder stamper architecture schematic diagram in the prior art.
Fig. 2 is the application powder dry pressing molding mould schematic cross-sectional view.
Fig. 3 is the schematic diagram of the section structure when the application dry pressing molding mould compresses.
When Fig. 4 is that the application dry pressing molding mould embryo material pops up.
Fig. 5 is that the application powder dry pressing molding mould manufactures workpiece flow diagram.
Specific embodiment
Referring to figs. 1 to powder dry pressing molding mould 100 shown in Fig. 3, powder dry pressing molding mould is shown only in figure
Other inessential components except the molds such as press are omitted in 100 necessary parts.The powder is dry-pressing formed in this application
Elastomer is arranged in mold 100 in molding die, and during powder dry-pressing elastic deformation occurs for elastomer, the elastic deformation
So that pressure suffered by the powder raw material 28 and its internal stress equalizing generated, adjust naturally.
The powder dry pressing molding mould includes: die wall 24, is used to form die cavity 20；Die cavity 20 inside the die wall 24 can
With the need depending on the shape of molding workpiece 29, such as when shaping workpiece 29 is gear, ring gear, ratchet die cavity can be
It is round.Die wall 22 provides enough intensity compared with other component thickness, and the component in die wall 24 and other molds can be metal material
The materials such as material or higher strength alloys material, such as steel titanium steel are fabricated.
The dry pressing molding mould 100 further includes the formed punch 3 with the die wall 24 cooperation, is arranged in the die cavity 20
It is interior, with core model 26 and be set in outside the core model 27 core model housing 26；On the formed punch can 3 setting it is corresponding with workpiece
Die cavity, such as gear die cavity is set so that the powder raw material 28 is in compression on the formed punch 3 when the workpiece is gear
Form gear shape.Formed punch 3 is pushed in compression by external press, and external press, which provides pressure and controls formed punch 3, to be compressed
When stroke.
Elastomer 25 is set on formed punch 3, which generates elasticity when the formed punch compresses powder raw material 28
25 deformation；The deformation quantity of obvious elastomer 25 is as the process of the formed punch 3 gradually moved gradually increases, and formed punch 3 stops
The deformation quantity of the elastomer 25 reaches maximum when only moving.
Die cavity seat 4 is set in the die cavity 20 other side opposite with the formed punch 3, is arranged in the die cavity 28 in institute
It states when formed punch 3 compresses the powder raw material 28 and support force is provided.Die cavity seat 4 can be taken off from the die cavity 20 to facilitate pair
Die cavity 20 loads powder raw material 28, and die cavity seat 4 provides support by press at work, and die cavity seat 4 includes that a part enters institute
The component 22 of die cavity 20 is stated, die cavity seat 4 further includes that the size of stop bit part 21 described in another part stop bit part 21 is greater than described in entrance
Part 22 in die cavity, stop bit part tool 21 prevent the die cavity seat 4 from falling into the die cavity, and stop bit part 4 is located at the entrance
Peripheral side inside die cavity 28.Settable die cavity 20 corresponding with workpiece on die cavity seat 4, for example, the workpiece 29 be gear when
Gear die cavity 20 is set on the die cavity 20 so that the powder raw material 28 forms gear shape in compression, in compression process
Middle raw material 28 is pressed into the gear die cavity of the die cavity seat 22 by formed punch 3, to form gear shape.
In the outside of the die wall 22, the top of the die cavity 20 is additionally provided with powder materials filling device 23 and is used for powder
Raw material 28 injects die cavity 20, and powder materials filling device 28 can connect feeding device for endlessly to powder materials filling device
28 feed, the filling opportunity that there is powder materials filling device 28 control system to be used to control powder materials.
The formed punch 3 is arranged in die cavity 20 and can move powder original preset in compression die cavity 20 in the die cavity 20
Material 28, when powder raw material 28 is compressed, the elastomer 25 is deformed after being compressed, to the powder after deformation
The pressure and stress that there is the stress inside pressure and powder raw material 28 that raw material 28 is subject to corrective action to make it internal
Homogenization, to guarantee that intensity after the molding of workpiece 25, rub proofness reach with multiple punch mold 3 and with floating structure manufacture
The identical intensity of workpiece 25.
3 structure of formed punch includes core model 27 and core model housing 26, in this application core model housing 26 and the core model 27
Formed punch work when with 27 synchronizing moving of core model.Core model 26 and core model housing 26 are used to compress the end of the powder raw material 28
Portion is mutually aligned, and the elastomer 25 protrudes from the end of the core model set 27 and core model.The embryo material of elastomer 25 upon compression
The recess 291 to contract is formed on 29, this recess 291 is very common such as gear, ratchet in workpiece.It is described recessed simultaneously
Falling into 291 is also the interface as elastomer 25 and 29 power of embryo material transmitting.It should be noted that described due in compression process
Described in elastomer 25 can generate deformation, should be when the variation of workpiece configurations caused by the deformation of elastomer 25 be examined in design
Including worry.
The cross section of the elastomer 25 is less than the cross section of the core model 27, and elastic 25 bodies are placed in the core model 27
Surface, and elastomer 25 is not contacted with the wall of the surrounding of the die cavity.The section of the elastomer 25 in this application
For rectangle, stereochemical structure can be shape or structure well known to cylindrical body, cube or other skilled in the art.It is described
Elastomer 25 selects the material of low elastic modulus, such as elastomer 25 that can select including rubber, polyurethane, silica gel and its compound
The low elastic modulus such as material or the elasticity modulus material similar with above-mentioned material.
The application also provides a kind of method reference figure X that manufacture workpiece is carried out using above-mentioned powder dry pressing die set, manufactures work
The step of part comprising steps of
S1 referring to Fig.1, removes the opening die cavity 20 of die cavity seat 3 for powder raw material from die wall 22 and injects the die cavity；
S2 reinstalls to cavity closed the die cavity seat 4 on the die wall；
S3 moves powder raw material 28 described in 20 drift in die cavity, during compression above formed punch referring to Fig. 3
Elastomer 25 deformation occurs that make the powder raw material 28 be compressed into 28 internal stress of powder raw material during embryo material 29 equal
It is even；
S4 removes die cavity seat 3 from die wall 22 and opens the die cavity 20 referring to Fig. 4；
The embryo material 29 of compression forming is removed die cavity by the formed punch in the mobile die cavity 20 of S5.
Die cavity seat is removed from the die cavity of the die wall in step sl, can be manufactured embryo with last workpiece after completing
Material removes die cavity 20 by movable punching head and carries out simultaneously, if it is that independent step cannot that mold is used so step S1 for the first time
With the component for removing embryo material after the completion of the manufacture of last workpiece.The injection of the powder referring to described in Fig. 2 is infused by raw material injection device
Enter, the injection rate of powder raw material is quantitative.
In step s 2, it should be automation that die cavity seat, which is mounted on the process of the die cavity wall, and the powder is former at this time
Material 28 has completely passed into the die cavity 20 but powder raw material 28 not yet forms the die cavity seat by compression and seals powder raw material
It closes in the die cavity.
It is fixed referring to the position of Fig. 4 die cavity seat 29 in step s3 by press, formed punch 3 is by press towards die cavity seat
Direction pushes, and is always kept in a fixed state to guarantee that embryo material 29 forms the position of the die cavity seat, and die cavity seat 4 uses high-intensitive material
Material is made its position and does not also change because of the compressed action of the formed punch.Die cavity seat 22 is compressed in this way in compression process
Powder raw material provides support force, the shape phase that the final shape of embryo material surrounds in die cavity 20 with die cavity seat 22 and the formed punch
Together.
Die cavity seat 4 is removed in practical manufacturing process referring to Fig. 4, the 5 step S4 and step S5 and removes embryo material 29
The step of die cavity, can push embryo material 29 by movable punching head 3 and embryo material 29 is allowed to push the die cavity seat 3 freely movably same
Shi Jinhang.Press is first removed to the pressure of formed punch, then removes press to the pressure of the die cavity seat 4 elastic shape of the elastomer 29 at this time
Become and reset, moved upwards in movable punching head 3 and the embryo material 29 of compression forming is gradually released into die cavity, die cavity seat 29 is also pushed out described
The dry compressing step of workpiece embryo material 29 is completed after die cavity 20.The last formed punch 3, which re-moves, to be returned in die cavity, and embryo material workpiece is completed
The process of manufacture.
Application scheme at least has the progress of the following aspects compared with the prior art: 1. reduce the complexity of mold,
Because the addition of elasticity enables dry pressing die set that must ensure workpiece uniform stressed, therefore complicated die design is not needed, makes dry-pressing mould
Tool simplifies.2. reduce to the investment of press, when dry-pressing complex part, complicated die needs press to carry out complicated active strokes to come
Reach, the press cost that can have complicated activity formation is also higher, and the application can achieve effect identical with complicated die
And it is required that active strokes it is also very simple, therefore the investment of press can be reduced.3. improving the flexibility of mold and can modify
Space, because elastomer and the more general mould steel processing cost of composite material are low and simple, and the present apparatus can be dismantled in a mold,
So the flexibility that mold uses is substantially improved.
Claims (10)
1. a kind of powder dry pressing molding mould with elastic material device characterized by comprising
Die wall is used to form die cavity；
Formed punch is arranged in the die cavity, with core model and the core model housing being set in outside the core model；
The formed punch is arranged in die cavity and can move powder raw material preset in compression die cavity in the die cavity；
Elastomer is set on the formed punch, which generates elastic deformation when the formed punch compresses powder raw material；
Die cavity seat, setting provide support force when the formed punch compresses the powder raw material in the die cavity.
2. a kind of powder dry pressing molding mould with elastic material device according to claim 1, which is characterized in that institute
It states core model and core model housing compresses the end of the powder raw material and is mutually aligned, the elastomer protrudes from the core model set and core
The end of mould.
3. a kind of powder dry pressing molding mould with elastic material device according to claim 2, which is characterized in that institute
The cross section for stating elastomer is less than the cross section of the core model.
4. a kind of powder dry pressing molding mould with elastic material device according to claim 1, which is characterized in that with
The die cavity seat of the die wall mating includes the stop bit part of stem and stem peripheral side into the die cavity.
5. a kind of powder dry pressing molding mould with elastic material device according to claim 1, which is characterized in that institute
Stating elastomer includes rubber, polyurethane, silica gel and its composite material.
6. a kind of manufacturing method of the dry-pressing formed workpiece of powder, which is characterized in that comprising steps of
Die cavity seat opening die cavity is removed from die wall, and powder raw material is injected into the die cavity；
The die cavity seat is reinstalled to cavity closed on the die wall；
Powder raw material described in drift in mobile die cavity, deformation occurs makes for elastomer during compression above formed punch
It obtains the powder raw material and is compressed into powder raw material uniform internal stress during embryo material；
Die cavity seat is removed from die wall opens the die cavity；
The embryo material of compression forming is removed die cavity by the formed punch in the mobile die cavity.
7. a kind of manufacturing method of the dry-pressing formed workpiece of powder as claimed in claim 6, which is characterized in that in the step
When " powder raw material described in the drift in mobile die cavity " carries out, the position of the die cavity seat does not change actively not because described in yet
The compressed action of formed punch and change, die cavity seat provides support force for compressed powder raw material.
8. a kind of manufacturing method of the dry-pressing formed workpiece of powder as claimed in claim 6, which is characterized in that the step " from
" formed punch in the mobile die cavity removes the embryo material of compression forming for the removal die cavity seat opening die cavity on die wall " and step
The step of removing die cavity seat in die cavity " and embryo material is removed die cavity can push embryo material by movable punching head and allow described in embryo material promotion
Die cavity seat freely movably carries out simultaneously.
9. a kind of manufacturing method of the dry-pressing formed workpiece of powder as claimed in claim 8, which is characterized in that described in mobile institute
Need to remove press machine in advance to the pressure of the die cavity seat before stating formed punch.
10. a kind of manufacturing method of the dry-pressing formed workpiece of powder as claimed in claim 8, which is characterized in that the embryo material quilt
The formed punch retracts in die cavity after taking-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094535.2A CN109663912A (en) | 2019-01-26 | 2019-01-26 | A kind of powder dry pressing molding mould and workpiece manufacturing method with elastic material device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094535.2A CN109663912A (en) | 2019-01-26 | 2019-01-26 | A kind of powder dry pressing molding mould and workpiece manufacturing method with elastic material device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109663912A true CN109663912A (en) | 2019-04-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910094535.2A Pending CN109663912A (en) | 2019-01-26 | 2019-01-26 | A kind of powder dry pressing molding mould and workpiece manufacturing method with elastic material device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1213344A (en) * | 1967-04-28 | 1970-11-25 | Asea Ab | Improved powder-compacting press |
| GB1266014A (en) * | 1969-02-24 | 1972-03-08 | ||
| US4061453A (en) * | 1975-10-06 | 1977-12-06 | Wolverine Aluminum Corporation | Tooling for a powder compacting press |
| BE896207A (en) * | 1983-03-18 | 1983-07-18 | Ct De Rech S De L Ind Belge De | Use of solid elastic mould cores - for consolidating particulate materials to obtain progressive uniform multiaxial stress distribution |
| CN101516552A (en) * | 2006-09-22 | 2009-08-26 | Gkn烧结金属有限公司 | Thin walled powder metal component manufacturing |
| CN103212660A (en) * | 2013-04-10 | 2013-07-24 | 盐城理研精密锻造有限公司 | Guide die |
| CN106938333A (en) * | 2016-01-04 | 2017-07-11 | 厦门钨业股份有限公司 | Powder fills die unit and fill method |
| CN209502971U (en) * | 2019-01-26 | 2019-10-18 | 昆山纳诺新材料科技有限公司 | A kind of powder dry pressing molding mould with elastic material device |
-
2019
- 2019-01-26 CN CN201910094535.2A patent/CN109663912A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1213344A (en) * | 1967-04-28 | 1970-11-25 | Asea Ab | Improved powder-compacting press |
| GB1266014A (en) * | 1969-02-24 | 1972-03-08 | ||
| US4061453A (en) * | 1975-10-06 | 1977-12-06 | Wolverine Aluminum Corporation | Tooling for a powder compacting press |
| BE896207A (en) * | 1983-03-18 | 1983-07-18 | Ct De Rech S De L Ind Belge De | Use of solid elastic mould cores - for consolidating particulate materials to obtain progressive uniform multiaxial stress distribution |
| CN101516552A (en) * | 2006-09-22 | 2009-08-26 | Gkn烧结金属有限公司 | Thin walled powder metal component manufacturing |
| CN103212660A (en) * | 2013-04-10 | 2013-07-24 | 盐城理研精密锻造有限公司 | Guide die |
| CN106938333A (en) * | 2016-01-04 | 2017-07-11 | 厦门钨业股份有限公司 | Powder fills die unit and fill method |
| CN209502971U (en) * | 2019-01-26 | 2019-10-18 | 昆山纳诺新材料科技有限公司 | A kind of powder dry pressing molding mould with elastic material device |
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