CN103847056A - Integral molding die for motor internal insulation layer and molding process - Google Patents
Integral molding die for motor internal insulation layer and molding process Download PDFInfo
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- CN103847056A CN103847056A CN201210498396.8A CN201210498396A CN103847056A CN 103847056 A CN103847056 A CN 103847056A CN 201210498396 A CN201210498396 A CN 201210498396A CN 103847056 A CN103847056 A CN 103847056A
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Abstract
An integral molding die for a motor internal insulation layer and a molding process. The die includes the following parts: an upper die body half piece and a lower die body half piece, which cooperate for usage; a mandrel assembly, which comprises a die body, and a front screw thread connection shaft and a rear screw thread connection shaft, welded to the front end and the rear end of the die body; a tail forming ring, which is in screw joint with the rear screw thread connection shaft of the mandrel assembly; a head blanking cap, which is in screw joint with the front screw thread connection shaft of the mandrel assembly; and a positioning and draft tool, which is in screw joint with the front screw thread connection shaft of the mandrel assembly. The invention makes the structure size and precision of an insulation layer preform meet the design requirements, and in the premise of satisfying the structure reliability, the invention reducing the negative quality of thermal protection.
Description
Technical field
The present invention relates to a kind of engine internal insulation integral die mould and mould pressing method.
Background technology
Along with the raising of missile weapon system technique and tactics index, the requirement of the indexs such as shape to engine internal insulation, varied in thickness, ablation property is also more and more higher, adopts traditional heat insulation layer paster forming technique to be difficult to meet the desirability that model is produced.
Engine internal insulation paster technique tradition is the raw cook stack that adopts different-thickness at present, at engine embedded position, the high temperature vulcanized molding technology thereof of vacuum pressed.Adopt the traditional handicraft heat insulation layer thickness can not linear change, there is certain step in inner surface, affects to a certain extent the security reliability of engine operation.
Summary of the invention
The object of this invention is to provide a kind of engine internal insulation integral die mould and mould pressing method, the physical dimension of heat insulation layer prefabricated component and precision can be met design requirement, on the basis that meets structural reliability, reduced thermo-lag passive quality.
For addressing the above problem, the invention provides a kind of engine internal insulation integral die mould, comprising:
The upper and lower mould body Hough part being used in conjunction with;
Core sub-assembly, comprises mould body and the forward and backward axle that is threaded that is welded on end, described mould body front and back;
Afterbody forming ring, is spirally connected with the rear thread connecting axle of described core sub-assembly;
Head blanking cover, is spirally connected with the preceding thread connecting axle of described core sub-assembly;
Location and withdrawing pattern frock, be spirally connected with the preceding thread connecting axle of described core sub-assembly.
Alternatively, described molding die also comprises:
Head strengthens lid and afterbody is strengthened lid, is separately fixed on two end faces of described upper and lower mould body Hough part;
Middle reinforcement covered, and is fixed on the side of described upper and lower mould body Hough part.
Alternatively, on described counterdie body Hough part, taper alignment pin is installed, for carrying out spacing to described patrix body Hough part.
Alternatively, described molding die also comprises: withdrawing pattern packing ring, is spirally connected with the preceding thread connecting axle of described core sub-assembly.
Alternatively, the mould of described core sub-assembly is as hollow structure.
Alternatively, described core sub-assembly integral spray tetrafluoroethene.
Alternatively, the inner surface ptfe coating of described upper and lower mould body Hough part.
The present invention also provides a kind of mould pressing method, adopts the molding die described in above-mentioned any one, and described method comprises:
Described location and withdrawing pattern frock, head blanking cover, core sub-assembly and afterbody forming ring are spirally connected as entirety;
Be wound around the heat insulation layer raw material that cut out in advance at the mould of described core sub-assembly with it, the mold hoisting after being spirally connected is filled to the pre-mold pressing position on described counterdie body Hough part;
The patrix body Hough part that closes on described counterdie body Hough part, and lift to vulcanizer;
Repeatedly crawl pressurization, has the time interval between each pressurization, to ensure that the bubble in mould internal insulation prefabricated component overflows;
After mold pressing puts in place, carry out baking;
After sulfuration finishes, remove described location and withdrawing pattern frock, head blanking cover, afterbody forming ring, described location and withdrawing pattern frock are installed on the preceding thread connecting axle of described core sub-assembly, utilize described location and withdrawing pattern frock to pull out described core sub-assembly;
Lift described patrix body Hough part to precalculated position, described heat insulation layer prefabricated component is taken out.
Alternatively, the number of times of described crawl pressurization is 4 to 5 times, and the time interval of each pressurization is not less than 5 minutes.
Alternatively, after mold pressing puts in place, be heated to 150 ± 5 DEG C, vulcanize 50 to 70 minutes.
Compared with prior art, this technology has the following advantages:
1, heat insulation layer entirety Integral mold is molded, physical dimension and the precision of prefabricated component meet design requirement, on the basis that meets structural reliability, reduce thermo-lag passive quality, traditional handicraft can increase the packing factor of powder charge for wall-attaching type charge constitution relatively, for free loading type charge constitution, be easier to ensure fit-up gap and precision;
2, prefabricated component presulfurization in mould in heat insulation layer entirety one die press technology for forming, sulfide stress is higher than conventional balloon press cure pressure, and heat insulation layer is finer and close, plain, has increased Burning corrosion resistance and abrasion resistance;
3, in the molded technical process of heat insulation layer entirety Integral mold, the micro-molecular gas of sulfuration shrinkage stress and sulfuration negative reaction is discharged in the time of presulfurization, avoid the interference to bonding in the time of vacuum pressed paster sulfuration bonding, ensured the reliability at heat insulation layer bonding (I interface);
4, prefabricated component has certain intensity through sulfuration, and not yielding compared with tradition in the time of vacuum pressed paster sulfuration bonding, in motor body, set operation is simple, and technique realizes and being more prone to.By the research to heat insulation layer integral die Design of Dies, processing installation, die trial and design improvement and mould pressing process and paster molding technology thereof, realize heat insulation layer prefabricated component integral die moulding (semi-cure state), in motor body, after set, adopt vacuum pressed paster technique to complete heat insulation layer manufacture process, the thickness of heat insulation layer meets linear change designing requirement, heat insulation layer densification, smooth, without overlap edge and overlap, meet the overall dimensions requirement of internal insulation design of solid rocket motor completely.
Brief description of the drawings
Fig. 1 is profile and the corresponding side view of the engine internal insulation integral die mould of the embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the mould pressing method of the embodiment of the present invention.
Detailed description of the invention
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in detail.
With reference to figure 1, the molding die of the present embodiment comprises: patrix body Hough part 8a, counterdie body Hough part 8b, core sub-assembly 9, afterbody forming ring 11, head blanking cover 3, location and withdrawing pattern frock 1, head strengthen cover 4, middlely strengthen covering 7, afterbody reinforcement covers 10, taper alignment pin 5, withdrawing pattern packing ring 2.
Wherein, patrix body Hough part 8a and counterdie body Hough part 8b are used in conjunction with.Core sub-assembly 9 comprises mould body and the preceding thread connecting axle 12, the rear thread connecting axle 13 that are welded on end, described mould body front and back, and in the present embodiment, mould is as hollow structure.Afterbody forming ring 11 is spirally connected with the rear thread connecting axle 13 of core sub-assembly 9.Head blanking cover 3 is spirally connected with the preceding thread connecting axle 12 of core sub-assembly 9.Location and withdrawing pattern frock 1 are spirally connected with the preceding thread connecting axle 12 of core sub-assembly 9.Withdrawing pattern packing ring 2 is spirally connected with the preceding thread connecting axle 12 of core sub-assembly 9.Head strengthen cover 4 and afterbody reinforcement cover 10 and be separately fixed on two end faces of upper and lower mould body Hough part 8a, 8b; Middle strengthen covering 7 sides that are fixed on upper and lower mould body Hough part 8a, 8b.
As a preferred embodiment, on counterdie body Hough part 8b, taper alignment pin 5 is installed, for carrying out spacing to patrix body Hough part 8a.
Location and withdrawing pattern frock 1 are mainly by outer ring, locknut, cover plate and standard component back-up ring, holding screw and thrust ball bearing and deep groove ball bearing composition, in mold process location and withdrawing pattern frock 1 by with the threaded engagement at core sub-assembly 9 two ends, make core sub-assembly 9, head blanking cover 3, afterbody forming ring 11 connects as a whole, after ensureing to feed in raw material by winding on core sub-assembly 9, be lifted into counterdie body Hough part 8b upper in correct predetermined mold pressing position, after mold pressing simultaneously finishes, utilize location and withdrawing pattern frock 1 can pull out core sub-assembly 9, ensure the structural intergrity of heat insulation layer prefabricated component 6.
Core sub-assembly 9 is welded as a whole by mould body and the forward and backward axle 12,13 that is threaded of hollow, hollow mould has alleviated the weight of core sub-assembly 9 in the time ensureing bulk strength, forward and backward axle 12,13 ends that are threaded adopt hollow, be conducive to the lifting of core sub-assembly 9, the mould body of core sub-assembly 9 adopts boring processing, precision and the tapering requirement of processing are ensured, core sub-assembly 9 integral spray tetrafluoroethene, ensure the inner surface quality requirement of heat insulation layer prefabricated component 6, and be conducive to pull out (taking off) mould.
Upper and lower mould body Hough part 8a, 8b adopt boring to process by seamless steel pipe interior surface, both ends of the surface for example, are strengthened covering 4,10 at correspondence position processing multiple (14) screwed hole and head, afterbody and are adopted screw to connect as one, be cut into two parts of upper and lower full symmetric at centre position line, inner surface ptfe coating, under the position-limiting action of taper alignment pin 5, as a whole under duty, ensure the outer surface external form quality of heat insulation layer prefabricated component 6.
Head, afterbody strengthen cover 4,10 and middle strengthen covering 7 and increased the bulk strength of mould and heated loaded area, head blanking cover 3 ensures the relative closure of die cavity, in the time of mold pressing, ensure that material has certain pressure and has certain mobility simultaneously, afterbody forming ring 11 has ensured that heat insulation layer prefabricated component 6 afterbody step surface tolerance dimensions are required to meet designing requirement.
In the present embodiment, the material of heat insulation layer prefabricated component 6 is J05A.The overall dimensions (millimeter) of heat insulation layer prefabricated component 6 are external diameter φ 212, length 710, and thickness is by 4 millimeters of linearities of head excessively to 12 millimeters of afterbodys, and afterbody step surface tolerance dimension is required to meet designing requirement.
With reference to figure 2, the mould pressing method of the present embodiment comprises:
Step S11, is spirally connected described location and withdrawing pattern frock, head blanking cover, core sub-assembly and afterbody forming ring into entirety;
Step S12, is wound around the heat insulation layer raw material that cut out in advance with it at the mould of described core sub-assembly, the mold hoisting after being spirally connected is filled to the pre-mold pressing position on described counterdie body Hough part;
Step S13, the patrix body Hough part that closes on described counterdie body Hough part, and lift to vulcanizer;
Step S14, repeatedly crawl pressurization, has the time interval between each pressurization, to ensure that the bubble in mould internal insulation prefabricated component overflows;
Step S15, after mold pressing puts in place, carries out baking;
Step S16, after sulfuration finishes, remove described location and withdrawing pattern frock, head blanking cover, afterbody forming ring, described location and withdrawing pattern frock are installed on the preceding thread connecting axle of described core sub-assembly, utilize described location and withdrawing pattern frock to pull out described core sub-assembly;
Step S17, lifts described patrix body Hough part to precalculated position, and described heat insulation layer prefabricated component is taken out.
In conjunction with Fig. 1, in step S11, location and withdrawing pattern frock 1 are positioned at the outside of head blanking cover 3.
In step S13, can utilize the position-limiting action of taper alignment pin 5, patrix body Hough part 8a is closed.
In step S14, be preferably point 4 to 5 crawl pressurizations, the time interval of each pressurization is not less than 5 minutes, ensures that the bubble in die cavity internal insulation prefabricated component 6 can effectively overflow, finer and close, plain to ensure heat insulation layer prefabricated component 6, increase Burning corrosion resistance and abrasion resistance.
In step S15, after mold pressing puts in place, be preferably and be heated to 150 ± 5 DEG C, vulcanize 50 to 70 minutes.
In step S16, after sulfuration finishes, being lifted into precalculated position utilizes specific purpose tool to take off after location and withdrawing pattern frock 1, afterbody forming ring 11, head blanking cover 3, load onto withdrawing pattern packing ring 2 and location and withdrawing pattern frock 1 at the head of core sub-assembly 9, utilize specific purpose tool to rotate locknut, pull out afterwards core sub-assembly 9.
In step S17, patrix body Hough part 8a is lifted into precalculated position, take out heat insulation layer prefabricated component 6, cleaning overlap, stand-by.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement to make possible variation and amendment to technical solution of the present invention; therefore; every content that does not depart from technical solution of the present invention; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all belong to the protection domain of technical solution of the present invention.
Claims (10)
1. an engine internal insulation integral die mould, is characterized in that, comprising:
The upper and lower mould body Hough part being used in conjunction with;
Core sub-assembly, comprises mould body and the forward and backward axle that is threaded that is welded on end, described mould body front and back;
Afterbody forming ring, is spirally connected with the rear thread connecting axle of described core sub-assembly;
Head blanking cover, is spirally connected with the preceding thread connecting axle of described core sub-assembly;
Location and withdrawing pattern frock, be spirally connected with the preceding thread connecting axle of described core sub-assembly.
2. engine internal insulation integral die mould according to claim 1, is characterized in that, also comprises:
Head strengthens lid and afterbody is strengthened lid, is separately fixed on two end faces of described upper and lower mould body Hough part;
Middle reinforcement covered, and is fixed on the side of described upper and lower mould body Hough part.
3. engine internal insulation integral die mould according to claim 1, is characterized in that, on described counterdie body Hough part, taper alignment pin is installed, for carrying out spacing to described patrix body Hough part.
4. engine internal insulation integral die mould according to claim 1, is characterized in that, also comprises: withdrawing pattern packing ring, is spirally connected with the preceding thread connecting axle of described core sub-assembly.
5. engine internal insulation integral die mould according to claim 1, is characterized in that, the mould of described core sub-assembly is as hollow structure.
6. engine internal insulation integral die mould according to claim 1, is characterized in that, described core sub-assembly integral spray tetrafluoroethene.
7. engine internal insulation integral die mould according to claim 1, is characterized in that, the inner surface ptfe coating of described upper and lower mould body Hough part.
8. a mould pressing method that adopts any one molding die in claim 1 to 7, is characterized in that, comprising:
Described location and withdrawing pattern frock, head blanking cover, core sub-assembly and afterbody forming ring are spirally connected as entirety;
Be wound around the heat insulation layer raw material that cut out in advance at the mould of described core sub-assembly with it, the mold hoisting after being spirally connected is filled to the pre-mold pressing position on described counterdie body Hough part;
The patrix body Hough part that closes on described counterdie body Hough part, and lift to vulcanizer;
Repeatedly crawl pressurization, has the time interval between each pressurization, to ensure that the bubble in mould internal insulation prefabricated component overflows;
After mold pressing puts in place, carry out baking;
After sulfuration finishes, remove described location and withdrawing pattern frock, head blanking cover, afterbody forming ring, described location and withdrawing pattern frock are installed on the preceding thread connecting axle of described core sub-assembly, utilize described location and withdrawing pattern frock to pull out described core sub-assembly;
Lift described patrix body Hough part to precalculated position, described heat insulation layer prefabricated component is taken out.
9. mould pressing method according to claim 8, is characterized in that, the number of times of described crawl pressurization is 4 to 5 times, and the time interval of each pressurization is not less than 5 minutes.
10. mould pressing method according to claim 8, is characterized in that, after mold pressing puts in place, is heated to 150 ± 5 DEG C, vulcanizes 50 to 70 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210498396.8A CN103847056B (en) | 2012-11-29 | 2012-11-29 | Electromotor internal insulation integral die mould and mould pressing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210498396.8A CN103847056B (en) | 2012-11-29 | 2012-11-29 | Electromotor internal insulation integral die mould and mould pressing method |
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| CN103847056A true CN103847056A (en) | 2014-06-11 |
| CN103847056B CN103847056B (en) | 2016-08-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875470A (en) * | 2015-05-15 | 2015-09-02 | 湖北三江航天江河化工科技有限公司 | Air distribution system for manufacturing engine heat insulation layer and control method of air distribution system |
| CN105437521A (en) * | 2015-12-04 | 2016-03-30 | 湖北三江航天江北机械工程有限公司 | Seal head heat insulating layer forming method and mold of filament winding engine heat insulating structure |
| CN107351421A (en) * | 2016-07-08 | 2017-11-17 | 湖北航天化学技术研究所 | A kind of solid propellant rocket internal insulation and its forming method |
| CN109605625A (en) * | 2018-11-30 | 2019-04-12 | 湖北航天化学技术研究所 | A kind of Solid Rocket Motor combustion chamber case insulation forming method |
| CN110186741A (en) * | 2019-07-03 | 2019-08-30 | 江西航天经纬化工有限公司 | A kind of mold and its application method being used to prepare ablating rate test test specimen |
| CN112223781A (en) * | 2020-09-08 | 2021-01-15 | 湖北三江航天江北机械工程有限公司 | Method for sticking heat-insulating layer of large-diameter and large-thickness end socket of fiber-wound shell of solid rocket engine |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875470A (en) * | 2015-05-15 | 2015-09-02 | 湖北三江航天江河化工科技有限公司 | Air distribution system for manufacturing engine heat insulation layer and control method of air distribution system |
| CN105437521A (en) * | 2015-12-04 | 2016-03-30 | 湖北三江航天江北机械工程有限公司 | Seal head heat insulating layer forming method and mold of filament winding engine heat insulating structure |
| CN105437521B (en) * | 2015-12-04 | 2017-06-27 | 湖北三江航天江北机械工程有限公司 | Fiber winds the head insulation forming method and its mould of engine heat insulating construction |
| CN107351421A (en) * | 2016-07-08 | 2017-11-17 | 湖北航天化学技术研究所 | A kind of solid propellant rocket internal insulation and its forming method |
| CN107351421B (en) * | 2016-07-08 | 2019-08-23 | 湖北航天化学技术研究所 | A kind of solid propellant rocket internal insulation and its forming method |
| CN109605625A (en) * | 2018-11-30 | 2019-04-12 | 湖北航天化学技术研究所 | A kind of Solid Rocket Motor combustion chamber case insulation forming method |
| CN110186741A (en) * | 2019-07-03 | 2019-08-30 | 江西航天经纬化工有限公司 | A kind of mold and its application method being used to prepare ablating rate test test specimen |
| CN112223781A (en) * | 2020-09-08 | 2021-01-15 | 湖北三江航天江北机械工程有限公司 | Method for sticking heat-insulating layer of large-diameter and large-thickness end socket of fiber-wound shell of solid rocket engine |
| CN112223781B (en) * | 2020-09-08 | 2022-06-10 | 湖北三江航天江北机械工程有限公司 | Method for sticking heat-insulating layer of large-diameter and large-thickness end socket of fiber-wound shell of solid rocket engine |
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| CN103847056B (en) | 2016-08-03 |
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