CN104972116B - The frock of method for exhausting and the implementation this method of shaping - Google Patents
The frock of method for exhausting and the implementation this method of shaping Download PDFInfo
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- CN104972116B CN104972116B CN201510371979.8A CN201510371979A CN104972116B CN 104972116 B CN104972116 B CN 104972116B CN 201510371979 A CN201510371979 A CN 201510371979A CN 104972116 B CN104972116 B CN 104972116B
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Abstract
The technical problems to be solved by the invention are to provide a kind of sizing method for exhausting.The sizing method for exhausting is to be provided with exhaust conducting structure, discharge chamber is opened up in the exhaust conducting structure, discharge chamber is in communication with the outside, connected again on exhaust conducting structure surface provided with steam vent with discharge chamber, exhaust conducting structure outer wall profile is arranged to be adapted with blank inner chamber profile, and both are positioned at the profile and are adapted position, and paving fills up sand burning between exhaust conducting structure and blank, carries out heating exhaust.Secondly, the invention provides a kind of sizing exhaust tooling for implementing the above method.Sizing exhaust includes being vented conducting structure, it is characterised in that：Exhaust conducting structure includes cavity structure, the cavity structure is in communication with the outside, while is vented the through hole that conducting structure surface is communicated with cavity structure, and the cavity structure is discharge chamber, through hole is steam vent, and the outer wall profile of the exhaust conducting structure and the inner chamber profile of blank are adapted.
Description
Technical field
The present invention relates to a kind of sizing method for exhausting of blank and the frock of implementation this method.
Background technology
Powder metallurgy is a kind of efficient, high-quality, accurate, low-loss and energy-saving near-purification formation of parts manufacturing technology, but powder
Metallurgical technology needs to add adhesive when manufacturing part geometry profile, so as to improve the flowing of powder during compressing
Property, while make powder that there is higher viscosity again, pressing pressure is obtained more effective and evenly transmission in the powder.
The mobility, fillibility and mouldability of mixed-powder can be improved well by adding adhesive, and powder can be in pressing process
Uniform flow to each corner without cracking, so as to which highly complex geometric shape is made.In the process of powder sintered shaping
In, at high temperature, adhesive can occur decomposing or gasify from blank, so that stomata, cracking, finished product density occurs in part
Phenomena such as skewness, so before blank sintering needing that degreasing is exhausted to blank.
At present, blank is exhausted and sintering technology in, it is commonly found that blank is in high temperature environments often
There is different degrees of deformation, and then defect ware occur；If the extension supporting structure on blank, blank and branch are found again
It can especially work as hair because of phenomena such as being vented the different degrees of stomata of poor appearance, cracking, density unevenness on the wall that support structure is contacted
When blank has inner-cavity structure, it is just more serious to be vented poor the problem of causing.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of sizing method for exhausting, with it, hair can be realized
The sizing bleeding of blank, and good exhaust effect blank is not likely to produce deformation.Secondly, the invention provides in one kind implementation
State the sizing exhaust tooling of method.
To achieve the above object, sizing method for exhausting provided by the present invention is is provided with exhaust conducting structure, described
Exhaust conducting structure opens up discharge chamber, and discharge chamber is in communication with the outside, then is provided with steam vent and row on exhaust conducting structure surface
Air cavity connects, and exhaust conducting structure outer wall profile is arranged to be adapted with blank inner chamber profile, and both are positioned at the wheel
The adaptable position of exterior feature, and paving fills up sand burning between exhaust conducting structure and blank, carries out heating exhaust.The above method
In, it is in communication with the outside discharge chamber is provided with exhaust conducting structure, steam vent and exhaust is provided with exhaust conducting structure surface
Chamber is connected, and exhaust conducting structure is navigated into its outer wall profile with behind the adaptable position of blank inner chamber profile, being turned in exhaust
Paving fills out sand burning between structure and blank, then now, due to exhaust conducting structure outer wall profile and blank inner chamber profile phase
Adapt to, so during heating, it is only necessary to by controlling suitable temperature then to realize the gas that blank inner chamber is discharged
Body is discharged into discharge chamber from the steam vent on exhaust conducting structure, and then is discharged from discharge chamber；Simultaneously during exhaust, blank
Gas can be discharged directly caused by part outer wall；In addition after paving fills out sand burning, the hole and aperture between sand seam are for gas
Larger for body, gas can still be discharged by sand slot apertures gap；And sand burning paving is filled out in exhaust conducting structure and blank
Between, because exhaust conducting structure outer wall profile is adapted with blank inner chamber profile, sand burning can be in exhaust conducting structure
Uniform sand body structure is formed between blank, can be right so as to spread the sand burning filled out between exhaust conducting structure and blank
Blank provides uniform holding power, and then ensures that blank is not in heating deformation during exhaust of shaping and is influenceed
Quality, it is achieved and blank is shaped during exhaust.In the above-mentioned methods, it is possible to achieve blank is shaped
Bleeding, and may insure that blank has preferable exhaust effect, especially for the inwall exhaust effect of blank
There is great improvement, at the same time, it is possible to achieve the structure of blank is effectively supported and prevents its heat distortion, from
And realize preferably sizing exhaust.
Being further that the exhaust conducting structure outer wall profile is adapted with blank inner chamber profile is：Exhaust conducting
The vertical range of any distance closest approach is equal to each other between structure outer wall profile and blank inner chamber profile.Moreover,
Radial direction vertical range between blank and exhaust conducting structure is set in 3-5 millimeters.Pass through the above method, blank inner chamber
Middle any part can keep fully closing on enough and contact with exhaust conducting structure, and then ensure blank and exhaust conducting knot
There is exhaust efficiency good enough between structure；Meanwhile the profile being vented between conducting structure outer wall and blank inwall can keep appointing
Meaning is equal at a distance of closest approach vertical range mutual distance, then can effectively ensure that the exhaust efficiency at each position of blank keeps one
Cause, avoid partial exhaust gas difference on effect and cause defect ware, so that blank is made after the above method carries out sizing exhaust
Finished product there is the preferable uniformity；And by the above method, it can substantially ensure that in exhaust conducting structure outer wall and blank
There is close enough adaptable distance, so as to after paving fills out sand burning between chamber, it is sufficient to ensure sand burning have to blank compared with
Good support fixed effect.
It is further that steam vent is arranged into the consistent through hole in some apertures is uniformly arranged covered with exhaust conducting structure
Gas.By the above method, and then ensure that blank can be uniformly and effectively vented by being vented conducting structure.
It is further that the sand burning selects Al2O3Or SiO2Particle, the sintering fineness of sand are 65 mesh to 10 mesh.Sintering
Sand selects Al2O3Or SiO2Particle, it is due to Al2O3Or SiO2Manufactured particle can preferably meet the saturating of exhaust process of shaping
Gas requirement, and there is excellent heat conductivility, so as to realize that each position of blank is heated evenly, and can preferably complete
Support and sizing to blank, it is ensured that blank is not in heating deformation in exhaust process of shaping；This is sintered simultaneously
The Task-size Controlling of sand is a parameter value more optimized for being exhaust of 65 mesh to 10 mesh for sand burning, stress sizing.
Secondly the invention provides a kind of sizing exhaust tooling for implementing the above method.The sizing exhaust tooling includes exhaust
Conducting structure；Exhaust conducting structure includes cavity structure, and the cavity structure is in communication with the outside, while is vented conducting structure surface and sets
There is the through hole of connection cavity structure, the cavity structure is discharge chamber, and through hole is steam vent, the outer wall wheel of the exhaust conducting structure
The wide inner chamber profile with blank is adapted.Pass through said apparatus, it is possible to achieve bleeding of being shaped to blank, and can be with
Ensure that blank has preferably sizing exhaust effect：Exhaust conducting structure includes the discharge chamber of cavity structure, and the discharge chamber
It is in communication with the outside, the steam vent of cavity structure, while the outer wall profile of the exhaust conducting structure is communicated with discharge chamber surface
It is adapted with the inner chamber profile of blank；So as to be spread according to the above method of the present invention between exhaust conducting structure and blank
After filling out sand burning, the beneficial effect in above-mentioned sizing method for exhausting can be achieved in heating exhaust at a set temperature.
It is further that the opening that discharge chamber is in communication with the outside is opened in exhaust conducting structure upper end.By discharge chamber and outside
The opening of boundary's connection is located at the upper end of exhaust conducting structure, so as to which in a heated state, the gas of blank inner chamber discharge holds very much
Easily utilize the variable density under heating condition to enter to produce opening discharge exhaust conducting structure of the lift from top, accelerate exhaust speed
Degree, so as to which the dynamic equilibrium that promotes to be vented in conducting structure is to being advantageous to carry out gas discharge direction.
Further that the percent opening on the exhaust conducting structure be 40-80%, steam vent be some apertures unanimously,
Uniform through hole of arranging is distributed in exhaust conducting structure surface；The steam vent aperture is 0.1-1 millimeters.It will be vented on conducting structure
Steam vent be set to arrangement uniformly, aperture is consistent, quantity is some, so that it is guaranteed that in exhaust process of shaping, blank inner chamber is each
Position can both have the exhaust efficiency of relatively uniformization；Steam vent aperture is 0.1-1 millimeters, the perforate being vented on conducting structure
Rate is 40-80%, it can be ensured that has preferable exhaust efficiency between discharge chamber and blank and now the paving of sand burning fills out effect
Fruit is preferable；Now, it is only necessary to can ensure have preferably between discharge chamber and blank using the sand burning of suitable particle size
The paving of exhaust efficiency and now sand burning, which is filled out, to work well.
It is further that the frock is provided with positioner.So as to realize that blank loads with exhaust conducting structure positioning
To predetermined position.
This kind of method and frock, which especially tackle inner chamber, the blank sizing exhaust process of larger depth, has clearly
Advantage, it is possible to achieve bleeding of being shaped to blank, and may insure that blank has preferable exhaust effect, especially
It is that the inwall for being directed to blank has preferable exhaust effect, at the same time, it is possible to achieve the structure of blank is carried out effectively
Support and prevent its heat distortion.
Brief description of the drawings
Fig. 1 is a kind of frock semi-cutaway for implementing sizing method for exhausting.
Fig. 2 is the top view of frock in Fig. 1.
Embodiment
A kind of frock of implementation sizing method for exhausting as shown in Figure 1 and Figure 2, use it for a kind of powder metallurgy pressing and
Into chimney filter blank sizing degreasing exhaust production in.
The frock is to include being vented conducting structure 1；It is tubular structure to be wherein vented conducting structure 1；The blank 4 is filter
Pipe blank, the chimney filter blank are tubular structure.
The exhaust caliber of conducting structure 1 is slightly less than chimney filter blank caliber, and the exhaust conducting structure 1 is high temperature resistant rigidity
Material is made, and the material that conducting structure 1 is vented in the present embodiment uses stainless steel；The exhaust conducting structure 1 includes the He of discharge chamber 2
Steam vent 3；The discharge chamber 2 is the cavity structure of exhaust conducting structure 1, and the exhaust conducting structure 1 of steam vent 3 surface opens up
Some arrangements are uniform, the consistent through hole in aperture, and the through hole connects through exhaust conducting structure 1 with the cavity structure, that is, is vented
Hole 3 connects with discharge chamber 2；Meanwhile it is 0.8 millimeter to be vented the aperture of steam vent 3 on conducting structure 1, is vented on conducting structure 1
Percent opening is 70%.In the frock of above-described embodiment, the outer wall in exhaust conducting structure 1 close to bottom position, positioning dress is set
5 are put, the positioner 5 is the annular sheet being looped around on the exhaust outer wall of conducting structure 1, and the annular sheet is to be horizontally mounted.
In the frock of the present embodiment, blank 4 is placed on positioner 5, i.e., chimney filter blank is set in exhaust
Outside conducting structure 1, the above-mentioned caliber of exhaust conducting structure 1 is slightly less than chimney filter blank, in the present embodiment specifically, will be vented
Between the outer wall and the inwall of blank 4 of conducting structure 1 vertical range control be 4 millimeters, now, exhaust conducting structure 1 through
Chimney filter blank inner chamber；Again by the SiO of 12 mesh2Uniformly paving is filled between exhaust conducting structure 1 and chimney filter blank sand burning, will
Frock is inserted design temperature and heated, and treats to cool down taking-up after the completion of chimney filter blank exhaust sintering.
The frock of sizing method for exhausting and implementation this method in the present embodiment, except that can apply in above-mentioned powder metallurgy
Suppress in the chimney filter blank sizing degreasing exhaust production formed, also to can be applied to blank 4 made of other powder metallurgy
In sizing exhaust production, and it can use in blank 4 shapes exhaust production.Only need to set outside exhaust conducting structure 1
Wall profile is adapted with the inner chamber profile of blank 4, and is vented conducting structure 1 and is provided with discharge chamber 2 and steam vent 3；In reality
Implement in production, according to the shape and size of blank 4, the shape contour for being vented conducting structure 1 and blank 4 and row are set
Radial direction vertical range between gas conducting structure 1, in actual production, it is contemplated that each position of blank 4 is uniformly vented, then will
The outer wall profile design of discharge chamber 2 is adapted for the inner chamber profile as far as possible with blank 4, so as to realize in heating process
The exhaust efficiency that middle blank 4 has had, while after sand burning is filled, blank is also possible to prevent while being exhausted
4 deform upon, and complete sizing exhaust.This kind of method and frock, which especially tackle inner chamber, the sizing row of blank 4 of larger depth
Gas process, there is obviously advantage, it is possible to achieve bleeding of being shaped to blank 4, and may insure that blank 4 has
Preferable exhaust effect, there is preferable exhaust effect especially for the inwall of blank 4, at the same time, it is possible to achieve right
The structure of blank 4 is effectively supported and prevents its heat distortion.
Claims (9)
1. method for exhausting of shaping, the blank for being formed in powder metallurgy to powder compacting carries out heating exhaust, and its feature exists
In：Exhaust conducting structure (1) is provided with, discharge chamber (2) is opened up in the exhaust conducting structure (1), by discharge chamber (2) and the external world
Connection, then connected on exhaust conducting structure (1) surface provided with steam vent (3) with discharge chamber (2), by exhaust conducting structure (1) outside
Wall profile is arranged to be adapted with blank (4) inner chamber profile, and both are positioned at the profile and are adapted position, and is led in exhaust
Logical paving between structure (1) and blank (4) fills up sand burning, carries out heating exhaust.
2. sizing method for exhausting as claimed in claim 1, it is characterised in that：It is described exhaust conducting structure (1) outer wall profile with
Blank (4) inner chamber profile, which is adapted, is：Be vented between conducting structure (1) outer wall profile and blank (4) inner chamber profile arbitrarily away from
Vertical range from closest approach is equal to each other.
3. sizing method for exhausting as claimed in claim 2, it is characterised in that：By blank (4) with exhaust conducting structure (1) it
Between radial direction vertical range be set in 3-5 millimeters.
4. sizing method for exhausting as claimed in claim 1, it is characterised in that：It is consistent that steam vent (3) is arranged to some apertures
Through hole uniformly covered with exhaust conducting structure (1) be exhausted.
5. sizing method for exhausting as claimed in claim 1, it is characterised in that：The sand burning selects Al2O3Or SiO2Particle,
The sintering fineness of sand is 65 mesh to 10 mesh.
6. sizing method for exhausting as claimed in claim 1, it is characterised in that：The opening that discharge chamber (2) is in communication with the outside opens up
In exhaust conducting structure (1) upper end.
7. sizing method for exhausting as claimed in claim 1, the percent opening being vented on conducting structure (1) is 40-80%, row
Stomata (3) is that some apertures are consistent, uniform through hole of arranging is distributed in exhaust conducting structure (1) surface.
8. sizing method for exhausting as claimed in claim 7, it is characterised in that：Steam vent (3) aperture is 0.1-1 millimeters.
9. sizing method for exhausting as claimed in claim 1, it is characterised in that：The exhaust conducting structure (1) and blank (4)
Between be provided with positioner (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510371979.8A CN104972116B (en) | 2015-06-30 | 2015-06-30 | The frock of method for exhausting and the implementation this method of shaping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510371979.8A CN104972116B (en) | 2015-06-30 | 2015-06-30 | The frock of method for exhausting and the implementation this method of shaping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104972116A CN104972116A (en) | 2015-10-14 |
| CN104972116B true CN104972116B (en) | 2017-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510371979.8A Active CN104972116B (en) | 2015-06-30 | 2015-06-30 | The frock of method for exhausting and the implementation this method of shaping |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343034C (en) * | 2005-09-28 | 2007-10-17 | 陈特夫 | Exhaustive metal die |
| CN2832358Y (en) * | 2005-11-17 | 2006-11-01 | 陕西柴油机重工有限公司 | Elongated through-hole casting device for metal casting |
| CN103817875A (en) * | 2012-11-17 | 2014-05-28 | 安徽蓝德集团股份有限公司 | Die-casting mold with exhaust vent |
| CN103008598A (en) * | 2012-11-22 | 2013-04-03 | 大连滨城活塞制造有限公司 | Metal mold with exhaust holes |
| CN204818060U (en) * | 2015-06-30 | 2015-12-02 | 成都易态科技有限公司 | Design exhaust frock |
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2015
- 2015-06-30 CN CN201510371979.8A patent/CN104972116B/en active Active
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