CN104913692B - A kind of Fragile cap - Google Patents
A kind of Fragile cap Download PDFInfo
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- CN104913692B CN104913692B CN201510371704.4A CN201510371704A CN104913692B CN 104913692 B CN104913692 B CN 104913692B CN 201510371704 A CN201510371704 A CN 201510371704A CN 104913692 B CN104913692 B CN 104913692B
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- stress groove
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- fragile cap
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- groove
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Abstract
The invention discloses a kind of Fragile cap, its profile is in the housing of class truncated rectangular pyramids shape shape, and the curved chamfering shape of top surface surrounding of its outer wall, the end face center of its inwall is provided with the stress groove of ring-type, four corner portions of its madial wall are provided with overall cross-shaped stress groove, and the center superposition of the cross-like stress groove and the stress groove of ring-type.Fragile cap of the present invention can not damage guided missile warhead, its shattering process is reliable and stable according to broken by the regular positive center of cross-like stress groove.
Description
Technical field
The invention belongs to guided missile storage and emission system field, more particularly, to a kind of Fragile cap.
Background technology
Fragile cap is the important component in guided missile storage and emission system, transport and store when from sealing and protection make
With then needing rapid opening during transmitting, it is impossible to influence missile attitude.The shape that Fragile cap is not specified by, and require that Fragile cap has
The features such as simple in construction, light weight, intensity height, strong designability and high corrosion resistance.
It is general on Fragile cap to be disposed with stress groove or weaken groove, during MISSILE LAUNCHING, guided missile engine production before transmitting need to be utilized
Raw air-flow or nose of missile minor impact can be broken through, and realize that guided missile, without rapid fire is prepared, improves quick operation energy
Power.
In Practical Project practice, for the guided missile of specific model, it is found that existing Fragile cap can not meet requirement, deposit
Developing a kind of technical need of new Fragile cap.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, a kind of Fragile cap of present invention design, its profile is in class positive four
The housing of terrace edge shape, and the end face center of its inwall is provided with the stress groove of ring-type, and four corner portions of its inwall are set
There is overall cross-shaped stress groove, the stress groove of ring-type and the stress groove comprehensive function of cross-like are so as to ensure that Fragile cap just
It is broken to center, guided missile warhead is not damaged, requirement of the guided missile for Fragile cap of specific model is met.
To achieve the above object, the invention provides a kind of Fragile cap, its profile is in the housing of class truncated rectangular pyramids shape shape, and
The curved chamfering shape of top surface surrounding of its outer wall, the end face center of its inwall is provided with the stress groove of ring-type, four angles of its inwall
Overall cross-shaped stress groove, and the center superposition of the cross-like stress groove and the stress groove of ring-type are provided with portion.
By above inventive concept, the end face center of inwall is provided with the stress groove of ring-type, and at four angles of its inwall
Overall cross-shaped stress groove, and the center superposition of the cross-like stress groove and the stress groove of ring-type are provided with portion, so that
Stress concentration is formd, cross-like stress groove can ensure, by the regular rupture of cross-like stress groove when Fragile cap is broken, to realize
Directional separation is dished out, i.e., cap body is dished out along prefabricated weak area with mounting flange overall separation；Positive center annular stress groove,
Positive center cracking pressure can be weakened, it is ensured that Fragile cap forward direction center is broken, does not damage guided missile warhead.
Further, the groove depth of the stress groove of the ring-type and the cross-like stress groove is 7mm~11mm.Experiment card
Bright, when groove depth is 7mm~11mm, it is broken the most in time, and crushing effect is best.
Further, its outside wall surface flat smooth, so as to not increase missile flight resistance.
Further, its material is RPUF.
Further, its density is 100kg/m3~650kg/m3.As preferred, its density is 250kg/m3~
350kg/m3。
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1st, the end face center of inwall is provided with the stress groove of ring-type, and four corner portions of its inwall is provided with entirety and be in
The stress groove of cross-like, and the center superposition of the cross-like stress groove and the stress groove of ring-type, can realize and crush in time, and ensure
Crushing effect.
2nd, when groove depth is 7mm~11mm, it is broken the most in time, and crushing effect is best.
3rd, material is RPUF and density is 100kg/m3~650kg/m3Fragile cap, it is especially close
Spend for 250kg/m3~350kg/m3Fragile cap, have the advantages that light weight, small volume, intensity are high, can better meet and use
It is required that.
Brief description of the drawings
Fig. 1 is the RPUF Fragile cap graphics in the embodiment of the present invention；
Fig. 2 is the RPUF Fragile cap top view in the embodiment of the present invention；
Fig. 3 is the RPUF Fragile cap longitudinal sectional view in the embodiment of the present invention；
Fig. 4 is the RPUF Fragile cap upward view in the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
Fig. 1 is the RPUF Fragile cap graphics in the embodiment of the present invention；Fig. 2 is the embodiment of the present invention
In RPUF Fragile cap top view；Fig. 3 is that the RPUF in the embodiment of the present invention is easy
Broken lid longitudinal sectional view；Fig. 4 is the RPUF Fragile cap upward view in the embodiment of the present invention.
Four figure more than, its profile is in the housing of class truncated rectangular pyramids shape shape, overall that mongolia yurt type structure is presented.Outside it
The curved chamfering shape of top surface surrounding of wall, its outside wall surface flat smooth, such structure can not increase missile flight resistance, in it
The end face center of wall is provided with the stress groove of ring-type, and the stress groove notch cross section is in alphabetical " V " type, four corner portions of its inwall
Overall cross-shaped stress groove is provided with, i.e. the four of the housing of class truncated rectangular pyramids shape shape corner is provided with stress groove,
The stress groove of four corners, which is connected, constitutes cross-like.And the center superposition of the cross-like stress groove and the stress groove of ring-type, should
Center is exactly at the top center of stress groove.
The groove depth of the stress groove of ring-type and the cross-like stress groove is preferably 7mm~11mm.Fragile cap in the present invention
Material be RPUF, density is 100kg/m3~650kg/m3, density preferably is 250kg/m3~
350kg/m3.The wall thickness of stress groove everywhere can be set as needed, and the groove depth of stress groove can also be set as needed.Experiment
Prove, when groove depth is preferably 7mm~11mm, it is ensured that Fragile cap is that positive center is crushed, and is pressed when Fragile cap is broken when broken
The regular rupture of cross-like stress groove, realizes that directional separation is dished out.
The specific method for preparing Fragile cap in the present invention is as follows：
S1：Prepare raw material.
Wherein, weigh the combined polyether of constant weight, according to proportioning weigh foaming agent, fire retardant, chain extender, catalyst,
Foam stabiliser and kaolin, are added in combined polyether, and the group of high pressure foaming machine is stirring evenly and then adding into high speed agitator
Close in polyethers batch can, open stirring more than 40min, obtain component A.Specific proportioning is in component A：100 parts of combined polyether,
1.5 parts of foaming agent, 5.2 parts of fire retardants, 4 parts of chain extender, 2 parts of catalyst, 2 parts of foam stabilisers, 1.5 parts of kaolinite
Soil.Foaming agent is dichloro one fluoroethane, and the foam stabiliser is polyether modified silicon oil, and the catalyst is triethylene diamine,
The kaolin particle diameter is less than 1000nm.
Solid-state methyl diphenylene diisocyanate is connected into bucket to be put into baking oven, 60~70 DEG C of oven temperature is set, by solid-state
Isocyanates heating is fused into liquid, weighs isocyanates and adds in the isocyanates batch can of high pressure foaming machine, the B component is
76 parts~100 parts.
After raw material standard is good, in addition it is also necessary to worked as follows：
Mould prepares：In the present embodiment method, foaming molding mold is used.Fifth wheel cleaning on die-face is dry
Only, then use gauze wiped clean, during cleaning mould note that die-face can not be damaged；Then, with hairbrush or spray gun in mould
Molded surface uniformly coats one layer of releasing agent, current mark is not allow for during coating release agent, it is ensured that be coated to each working position；Finally fill
During with mould, assembling can be aided in using die-filling frock., should be careful during assembly jig, it must not damage, damage mould.
Mould is preheated：After the completion of mould assembling, it is placed on technique stroller and is pushed into preheating in baking oven, as environment temperature ＜ 26
DEG C when, it is ensured that mold temperature be 35 DEG C~50 DEG C, when environment temperature >=26 DEG C, it is ensured that mold temperature be 26 DEG C~50 DEG C.
, can implementation steps S2 after the completion of working above.
S2：The raw material are performed into mixing and obtain expanded material, moulding by casting is performed to expanded material, are then performed steady
Fixed processing；
Two kinds of raw material temperatures of foaming machine are set as 20 DEG C~25 DEG C, are calculated according to mold cavity volume and extrudate density
Poured weights, according to poured weights and the equipment flow set duration of pouring；Treat that equipment display instrument shows that raw material temperature reaches 20
DEG C~28 DEG C when, open die casting mouthful, spray gun is directed at the sprue gate raw material that will foam and poured into mould, closes sprue gate.It is former
Material is performed in high pressure foaming machine after mixing, is just poured into using spray gun in mould.
Stable processing is performed, to wait growth of being foamed after shaping to finish (4min~6min) could be poured with mould is pushed away into foaming
Note area simultaneously stands 10min~30min (4min of the growth time containing foaming~6min).It can not be shaken strongly in mould transfer process
It is dynamic, prevent bubble phenomenon of collapsing.
S3：Curing process is performed, curing process is 60min~120min to be stood first under natural environment, then
Solidify 1h~1.5h at 60 DEG C~70 DEG C；
S4：The demoulding is performed when temperature is less than 35 DEG C.
When mold temperature is less than 35 DEG C, it is stripped.To improve work efficiency, mould middle between cooling can be cooled down, can be solid
20min is cooled down between placing into cooling after change processing；
First the cavity plate of mould is laid down during the demoulding, and cavity plate cannot be placed straight above that on ground；If Fragile cap product glues
It is attached on punch-pin, then punch-pin is transferred in Semiautomatic demolding frock and be stripped, if Fragile cap product is sticked on cavity plate,
Then it is stripped using the blanking cover on sprue gate.
After the demoulding terminates, in addition it is also necessary to cleared up, polished, first cleaned up frangible cap surface releasing agent with gasoline, so
Cleaning corner, burr, then use gauze Wiping articles afterwards, remove oil stain and spot；Finally with waterproof abrasive paper or half emery cloth polishing product
Surface, then wipe product surface spot with clean cotton rag.
Finally it is machined, in correspondence position mark signature center line, and extends to corresponding face, machining cross shape should
Power groove and ring-type stress groove, in addition it is also necessary to repair file stress groove root burr, make stress groove smooth.
The stress groove of Fragile cap ring-type of the present invention and the stress groove comprehensive function of cross-like are so as to ensure that Fragile cap is positive
Center is broken, does not damage guided missile warhead, meets requirement of the guided missile for Fragile cap of specific model.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (4)
1. a kind of Fragile cap, it is characterised in that its profile is in the housing of class truncated rectangular pyramids shape shape, and the top surface surrounding of its outer wall is in
Arc angling shape, the end face center of its inwall is provided with the stress groove of ring-type, and four corner portions of its inwall are provided with overall submission
Forked stress groove, and the center superposition of the cross-like stress groove and the stress groove of ring-type,
The groove depth of the stress groove of the ring-type and the cross-like stress groove is 7mm~11mm,
Its material is RPUF,
The preparation method of the Fragile cap is as follows：
S1：Prepare raw material, the raw material include specific proportioning in component A and B component, component A and are：100 parts of combination
Polyethers, 1.5 parts of foaming agent, 5.2 parts of fire retardants, 4 parts of chain extender, 2 parts of catalyst, 2 parts of foam stabilisers, 1.5 parts
Kaolin,
The foaming agent is dichloro one fluoroethane, and the foam stabiliser is polyether modified silicon oil, and the catalyst is triethylene
Diamines, the kaolin particle diameter is less than 1000nm,
Foaming agent, fire retardant, chain extender, catalyst, foam stabiliser and kaolin are weighed according to proportioning, combined polyether is added to
In, it is stirring evenly and then adding into agitator in the combined polyether batch can of high pressure foaming machine,
The B component is methyl diphenylene diisocyanate, and solid-state methyl diphenylene diisocyanate is connected into bucket and is put into baking oven,
60~70 DEG C of oven temperature is set, the heating of solid-state methyl diphenylene diisocyanate is fused into liquid, diphenyl methane is weighed
Diisocyanate is added in the isocyanates batch can of high pressure foaming machine, and the B component is 76 parts~100 parts,
S2：The raw material are performed into mixing and obtain expanded material, moulding by casting is performed to expanded material, are then performed at stable
Reason,
The stabilization processes refer to：Deng shaping after foaming growth finish, by mould push away foaming pouring area and stand 10min~
30min,
S3：Perform curing process,
S4：The demoulding is performed when temperature is less than 35 DEG C.
2. a kind of Fragile cap as claimed in claim 1, it is characterised in that its outer wall flat smooth, so as to not increase guided missile
Flight resistance.
3. a kind of Fragile cap as claimed in claim 1 or 2, it is characterised in that its density is 100kg/m3~650kg/m3。
4. a kind of Fragile cap as claimed in claim 3, it is characterised in that its density is 250kg/m3~350kg/m3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510371704.4A CN104913692B (en) | 2015-06-30 | 2015-06-30 | A kind of Fragile cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510371704.4A CN104913692B (en) | 2015-06-30 | 2015-06-30 | A kind of Fragile cap |
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| Publication Number | Publication Date |
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| CN104913692A CN104913692A (en) | 2015-09-16 |
| CN104913692B true CN104913692B (en) | 2017-07-28 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101898336B1 (en) * | 2016-09-21 | 2018-09-12 | 주식회사 한화 | Launch tube cover |
| CN107932817A (en) * | 2017-11-29 | 2018-04-20 | 上海航天设备制造总厂 | A kind of bursting epoxy foam plastics Fragile cap and preparation method thereof |
| CN109352269A (en) * | 2018-10-26 | 2019-02-19 | 西安长峰机电研究所 | A kind of metal plate forming method of twin columns curved surface |
| CN109627746B (en) * | 2018-11-23 | 2021-04-06 | 贵州航天天马机电科技有限公司 | Large negative pressure polyurethane front end fragile protective cover and forming method thereof |
| KR102252824B1 (en) * | 2019-12-20 | 2021-05-17 | 주식회사 한화 | Notch break test piece |
| CN112066797B (en) * | 2020-08-31 | 2022-11-25 | 湖北三江航天万峰科技发展有限公司 | Frangible cover and forming method thereof |
| CN113701557A (en) * | 2021-08-30 | 2021-11-26 | 贵州航天天马机电科技有限公司 | Large external pressure low impact force frangible cover |
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| CN1844840A (en) * | 2006-04-30 | 2006-10-11 | 南京航空航天大学 | Frangible composite canister cover |
| CN201255610Y (en) * | 2008-08-12 | 2009-06-10 | 刘海斌 | Barrel type weapon sealing cover |
| CN201653274U (en) * | 2010-03-25 | 2010-11-24 | 中国兵器工业第五九研究所 | Easy-breaking through cover of tube/box type projectile weapon |
| CN102313491B (en) * | 2011-08-02 | 2014-11-26 | 南京航空航天大学 | Integral bursting type composite material launching box cover and manufacturing method thereof |
| CN103542773B (en) * | 2013-11-04 | 2015-04-01 | 上海燕兴科技实业有限公司 | Fragile rear cover of launching cylinder of weapon system |
| CN103913098A (en) * | 2014-03-12 | 2014-07-09 | 南京航空航天大学 | Multi-petal composite material launching box cover and preparation method thereof |
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