CN107253337B - A kind of blasting bolt box and preparation method thereof - Google Patents
A kind of blasting bolt box and preparation method thereof Download PDFInfo
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- CN107253337B CN107253337B CN201710703074.5A CN201710703074A CN107253337B CN 107253337 B CN107253337 B CN 107253337B CN 201710703074 A CN201710703074 A CN 201710703074A CN 107253337 B CN107253337 B CN 107253337B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
- F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Plates (AREA)
Abstract
A kind of blasting bolt box and preparation method thereof, it is related to bolt box and preparation method thereof, the purpose of the present invention is to solve existing blasting bolt load endurance is poor, intensity is not high, brisance be easy to cause pollution, uncontrollable problem, there are two quick-fried and fried bolt box side plates for the installation of blasting bolt box backboard two sides；Top plate is provided at the top of blasting bolt box backboard and two blasting bolt box inclined plates, backboard center offers lightening hole, and is equipped with several screws or rivet through-hole；Preparation method: dividing valve surface laying prepreg；Valve will be divided to be put into locating slot, and be laid with remaining covering；Molding；Heating, solidification；Cooling, demoulding；Machining.The present invention is applied to aerospace field.
Description
Technical field
The present invention relates to bolt boxes and preparation method thereof.
Background technique
Blasting bolt is a kind of Fire load for being applied to spacecraft earliest, and structure is mainly by the body of bolt and nut group
At.For blasting bolt as a connector, the realization of linkage function and the connection type of plain bolt or stud are closely similar,
Two targets can be linked together by tightening nut or the body of bolt.On the outer wall of body of bolt coyote hole, there is one week " v " shape
Slot forms the link of a strength weak in the structure of the body of bolt.When two connectors will be to be separated, main charge burning,
The indoor pressure of medicine increases suddenly, and after reaching certain numerical value, the fracture of V-shaped groove position, under the action of gunpowder thrust, two are connected
The object separation connect, bearing capacity mainly pass through the corresponding blasting bolt box of blasting bolt and complete: secondary structure will be drawn
Power loads on blasting bolt, and drag load is transferred to the illiteracy of barrel shell section in upper level structure by blasting bolt by blasting bolt box again
Pi Shang.
Transmission path of the above-mentioned drag load in above-mentioned blasting bolt box is divided into two: a portion pulling force passes through quick-fried
Fried bolt box structure is whole, and small size rigid body sliding axially occurs along rocket body, is transferred to attachment screw via backboard by bolt box plate
Or in rivet.It is shear-deformable that attachment screw or rivet occur for this part pulling force, since structure rigid body slides, each link
Shearing force caused by bolt is essentially identical.Another part pulling force passes through the malformation of blasting bolt box itself, by bolt box
Bottom plate is transferred in the attachment screw or rivet on backboard by floor.This part pulling force stretches attachment screw or rivet
Deformation, and the floor of traditional blasting bolt box designs so that the link screw of different location or the pulling force of rivet differ greatly: it leans on
The screw or rivet pulling force of nearly backboard end are much higher than the screw or rivet of base plate vicinity.Due to the pulling force of the second paths transmitting
The major part of total pulling force load is accounted for, therefore traditional blasting bolt box is limited to the utilization efficiency of attachment screw or rivet, often spiral shell
Bolt box backboard end cancellous screw or rivet are no longer valid, and the screw of base plate vicinity or rivet not yet plastic deformation.It is how effectively real
The ability to bear of existing blasting bolt box, and make its lightweight as far as possible, it is current problem.
Blasting bolt structure is simple, reliable operation, has biggish energy-mass ratio, meanwhile, there is small in size, operation
Feature easy to use.But since it is the separation for realizing connector by the fracture of metal shell, therefore, impact when separation
It is very big, it is difficult to realize accurately controlling for separating force, and also tend to fragment and pollutant generation when unlocking separation, this is right
There may be adverse effects for spacecraft.Therefore, increasingly mentioning with the development of space technology and to spacecraft security requirement
Height, blasting bolt are independently fewer and fewer in spaceborne application as connection and separator.
In addition, explosion product is enclosed in by existing blasting bolt box, box is intracavitary, used in the occasion that need to control pollution, has and divides
, assembly simple from structure and it is easy to use the features such as.If blasting bolt box destroys under transient pressure and percussion,
In box or box body component flies out, and percussion device or instrument may influence the safety of aircraft.It is badly in need of a kind of effective blasting bolt
Box solves the above problems.
Existing blasting bolt is chiefly used in Mulit-point Connection parting surface.Each blasting bolt is similar to plain bolt, and inside is equipped with fried
Medicine and igniter.When separation, explosive is detonated, and so that shearing lock is cut or is weakened slot along bolt and is disconnected, realizes two chorista solutions
Lock.Blasting bolt is wide in variety, mainly there is open flume type, shearing pin type, steel-ball type blasting bolt and pollution-free blasting bolt etc..It is this
The advantages of device is large carrying capacity, structure simple, reliable operation, easy to use.Shortcoming is to generally require multiple bolts,
It is difficult larger to guarantee that whole bolts simultaneously switch off.In addition also to guarantee that remains do not injure the structure of surrounding and set when bolt disconnects
It is standby, therefore protection structure should be correspondingly set when necessary.
Summary of the invention
The purpose of the present invention is to solve existing blasting bolt load endurance is poor, intensity is not high, and brisance is easy
It pollutes, it is difficult to the problem of controlling, and provide a kind of blasting bolt box and preparation method thereof.
A kind of blasting bolt box of the invention, it is by top plate, blasting bolt box backboard, two blasting bolt box inclined plate structures
At；There are two blasting bolt box side plates for the installation of blasting bolt box backboard two sides；Blasting bolt box backboard and two blasting bolt boxes
Top plate is provided at the top of inclined plate；The roof center offers blasting bolt connecting hole；The blasting bolt box backboard
Center offers lightening hole；
It is 160 ° that the vertical portion and bending part of the blasting bolt box backboard, which are formed by angle а, bending part
It is 110 ° with the angle beta that top plate is formed；
Several screws or rivet through-hole are offered on the blasting bolt box backboard.
A kind of preparation method of blasting bolt box of the invention, it is prepared using blasting bolt box molding die, tool
Steps are as follows for body:
One, according to laying angle and prepreg dosage needed for preparing blasting bolt box, dividing valve, small point of one and of valve greatly respectively
The working face laying prepreg of small point of valve two；
Two, divide the good prepreg of laying to valve, small point of valve one and small point of valve two greatly, be respectively placed at 3 positioning of lower plate
In slot one；
Three, in step 1 on the basis of dividing the prepreg of valve, small point of valve one and small point of two working face laying of valve greatly, by explosion
Laying angle and prepreg dosage needed for bolt box and thickness requirement continue laying prepreg；
Four, it molds
A, left plate and right side plate lower end are placed in the two sides locating slot two of lower plate, by being arranged in left plate and right side
The screwing through hole and the screw hole in lower plate two sides locating slot two of plate lower part, using bolt respectively by left plate and right side plate with
Lower plate is fixed；
B, front side board and back side panel are placed in lower plate, the lower surface of front side board and back side panel is made to be bonded the upper of lower plate
Surface；Front side board and back side panel inner surface are bonded the end face of left plate and right side plate two sides, and use screw or rivet, pass through
The screw or rivet through-hole that front side board and back side panel rear and front end is arranged in are fixed；
C, left plate and right side plate upper end are placed in the locating slot two of upper plate two sides respectively, by setting in left plate and
The screwing through hole and the screw hole in upper plate two sides locating slot two on right side plate top, using bolt respectively by left plate and right side
Plate is fixed with upper plate；
D, by the way that the screw or rivet through-hole of upper plate and lower plate left and right ends is arranged in, with screw or rivet by upper plate and under
Plate is (fixed；
Five, the molding die for having molded step 4, which is put into curing oven, is heated, is solidified；
Six, it is demoulded；
Seven, the testpieces after demoulding is machined, opens up blasting bolt connecting hole, lightening hole and screw or riveting
Follow closely through-hole；
The blasting bolt box molding die includes lower plate, divides valve, small point of valve one, small point of valve two, left plate, right side greatly
Plate, front side board, back side panel and upper plate；Wherein, lower plate upper surface offers 3 locating slots one, and the two sides of upper plate and lower plate are opened
Equipped with locating slot two；
Valve, small point of valve one, small point of valve two is divided to be rectangular parallelepiped structure greatly；And divide valve, small point of valve one and small point of valve two greatly
Length and height are all the same, small point of valve one and small point of valve two it is of same size；
The side and small point of valve one side corresponding with valve is divided greatly for dividing valve greatly are provided with right angled triangle sloping platform；Institute
The short side for the right angled triangle sloping platform stated is located at the rear side for dividing valve Yu small point of valve one greatly, and short side distance divides greatly valve or small point
The upper surface shortest distance of valve one is 8~10mm；
Valve, small point of valve one and small point of two bottom of valve is divided to be provided with the protrusion that shape matches with locating slot one greatly；
The length of locating slot two and the length of left plate, right side plate are all the same；On left plate and right side plate interior side-wall surface
It is respectively arranged with boss, the length of boss is consistent with the length of locating slot two, the height of the width and front side board, back side panel of boss
It is consistent；
Distance of two locating slots one in outside respectively away from lower plate edge is identical as projection width in three locating slots one；Often
Distance is 1.5 times of one width of locating slot between a locating slot one；
Described divides valve, small point of valve one and small point of two top front end of valve to bend downward greatly；Wherein, the horizontal end face on top with
It is 160 ° that bending end face, which is formed by angle а, and the angle beta for bending the vertical plane formation of end face and front is 110 °；
The upper and lower part of left plate and right side plate offers multiple screwing through hole, and locating slot two and screwing through hole phase
Corresponding position offers screw hole, left plate and right side plate and passes through on screw respectively fixed and locating slot two；
The inner surface of front side board and back side panel fits in the end face of left plate and right side plate two sides respectively, and front side board is with after
The lower surface of side plate is bonded with the upper surface of lower plate respectively；The front-end and back-end of front side board and back side panel offer screw or riveting
Follow closely through-hole；Front side board is fixedly connected with back side panel by screw or rivet through-hole；
The left and right ends of upper plate and lower plate offer screw or rivet through-hole, and connect by the way that screw or rivet through-hole are fixed
It connects.
The present invention include it is following the utility model has the advantages that
The blasting bolt box that the present invention designs is in 150000N pulling force finite element load test, blasting bolt of the invention
Box has good bearing capacity, and under this pulling force, bolt hole can not carry larger stress.
The present invention prepares blasting bolt box using carbon fibre material and compares with Al-alloy parts, and weight has dropped 14.5%.
The present invention is efficiently solved during preparing blasting bolt box by the mold of design blasting bolt box, is easy
The blasting bolt box unbalance stress now prepared prepares complicated problem.
The present invention passes through the angle of setting backboard and the thickness of prepreg dosage and backboard, top plate and inclined plate, and back
The angle of plate and top plate setting, so that there is very high bearing capacity using the blasting bolt box that carbon fiber prepares.
Detailed description of the invention
Fig. 1 is blasting bolt box structure schematic diagram；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is the rearview of Fig. 1；
Fig. 5 is the bottom view of Fig. 1；
Fig. 6 is the side view of Fig. 1；
Fig. 7 is blasting bolt box mold structure diagram；
Fig. 8 is small point of one structural schematic diagram of valve；
Fig. 9 and Figure 10 is to divide the structural blast bolt box mold schematic diagram of the working face laying prepreg of valve in size；
Figure 11, Figure 12 and Figure 13 are a point valve positioning schematic diagram；
Figure 14 and Figure 15 is laying residue cover portion (black portions) schematic diagram；
Figure 16 is schematic diagram after installation left and right side plate；
Figure 17 is to install schematic diagram after forward and backward side plate；
Figure 18 is schematic diagram after installation upper plate；
Figure 19 be it is machined after testpieces (blasting bolt box) photo；
Figure 20 is rigid boundary experimental rig figure, wherein 1 is testpieces, and 2 be hydraulic cylinder (20 tons maximum), and 3 pass for pulling force
Sensor, 4 be displacement sensor, and 5 be strain chip test system；
Figure 21 is strain measurement point diagram；
Figure 22 is aluminum alloy test part strain testing curve graph；Wherein, A to H respectively corresponds 1~8# measurement point；
Figure 23 is aluminum alloy test part and carbon fiber testpieces displacement measurement curve graph；Wherein, A is carbon fiber testpieces position
Test curve is moved, B is aluminum alloy test part displacement measurement curve；
Figure 24 is testpieces photo after first time tension test (slab cracks)；
Figure 25 is second of the tension test photo improved after Lay up design；
Figure 26 is rigid boundary condition's experimental provision structural schematic diagram；Wherein, 1 is, to connecting bolt, 2 is to install tooling additional, 3
It is testpieces for gasket, 4,5 be fixing bolt, and 6 be fixing seat, and F is power, and arrow direction is power thrusts；
Figure 27 be etc. rigidity boundary condition experimental rig；Wherein, 1 is installs tooling additional, and 2 be loading bolt, and 3 be testpieces,
4 be fixing seat, and F is power, and arrow direction is power thrusts；
Figure 28 is global finite element illustraton of model；
Figure 29 is X to maximum displacement distribution map；
Figure 30 is Y-direction maximum displacement distribution map；
Figure 31 is Z-direction maximum displacement distribution map；
Figure 32 is combination maximum displacement distribution map；
Figure 33 is that maximum stress checks Distribution value figure；
Figure 34 is that maximum stress checks Distribution value figure；
Figure 35 is X to stress envelope；
Figure 36 is Y-direction stress envelope；
Figure 37 is YZ to stress envelope；
Figure 38 is XZ to stress envelope.
Specific embodiment
Specific embodiment 1: a kind of blasting bolt box of present embodiment, it is by top plate 1a, blasting bolt box backboard
2a, two blasting bolt box inclined plate 3a are constituted；There are two blasting bolt box inclined plate 3a for the installation of the blasting bolt box two sides backboard 2a；It is quick-fried
Top plate 1a is provided at the top of fried bolt box backboard 2a and two blasting bolt box inclined plate 3a；The center top plate 1a offers
Blasting bolt connecting hole 4a；The center blasting bolt box backboard 2a offers lightening hole 5a；
It is 160 ° that the vertical portion and bending part of the blasting bolt box backboard 2a, which is formed by angle а, bending part
Dividing the angle beta formed with top plate 1a is 110 °；
Several screws or rivet through-hole 6a are offered on the blasting bolt box backboard 2a.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: the blasting bolt box back
Plate 2a with a thickness of 13mm；Blasting bolt box inclined plate 3a is with a thickness of 9mm；Top plate 1a is with a thickness of 30mm.Other and specific embodiment party
Formula one is identical.
Specific embodiment 3: the present embodiment is different from the first embodiment in that: blasting bolt box is using carbon
Made of fiber.It is other same as the specific embodiment one.
Specific embodiment 4: a kind of preparation method of blasting bolt box of present embodiment, it is using blasting bolt
The preparation of box molding die, the specific steps are as follows:
One, according to laying angle and prepreg dosage needed for preparing blasting bolt box, dividing valve 7, small point of valve 1 greatly respectively
With the working face laying prepreg of small point of valve 2 12；
Two, divide the good prepreg of laying to valve 7, small point of valve 1 and small point of valve 2 12 greatly, be respectively placed at the 3 of lower plate 2
In a locating slot 1；
Three, it on the basis of dividing the prepreg of valve 7, small point of valve 1 and small point of 2 12 working face laying of valve greatly, is pressed in step 1
Laying angle and prepreg dosage needed for blasting bolt box and thickness requirement continue laying prepreg；
Four, it molds
A, left plate 3 and 4 lower end of right side plate are placed in the two sides locating slot 2 10 of lower plate 2, by being arranged in left plate 3
It, respectively will be left using bolt with the screw hole 14 in the 2 two sides locating slot 2 10 of screwing through hole 13 and lower plate of 4 lower part of right side plate
Side plate 3 and right side plate 4 and lower plate 2 are fixed；
B, front side board 5 and back side panel 6 are placed in lower plate 2, under being bonded the lower surface of front side board 5 and back side panel 6
The upper surface of plate 2；Front side board 5 and 6 inner surface of back side panel are bonded the end face of 4 two sides of left plate 3 and right side plate, and use screw
Or rivet, it is fixed by screw or rivet through-hole 15 that 6 rear and front end of front side board 5 and back side panel is arranged in；
C, left plate 3 and 4 upper end of right side plate are placed in the locating slot 2 10 of 1 two sides of upper plate respectively, by being arranged on a left side
Screw hole 14 in the 1 two sides locating slot 2 10 of screwing through hole 13 and upper plate on 4 top of side plate 3 and right side plate, using bolt point
It is that left plate 3 and right side plate 4 and upper plate 1 is unfixed；
D, by the way that the screw or rivet through-hole 16 of 2 left and right ends of upper plate 1 and lower plate is arranged in, with screw or rivet by upper plate
1 and lower plate 2 it is fixed；
Five, the molding die for having molded step 4, which is put into curing oven, is heated, is solidified；
Six, it is demoulded；
Seven, the testpieces after demoulding is machined, opens up blasting bolt connecting hole, lightening hole and screw or riveting
Follow closely through-hole；
The blasting bolt box molding die includes lower plate 2, divides valve 7, small point of valve 1, small point of valve 2 12, left plate greatly
3, right side plate 4, front side board 5, back side panel 6 and upper plate 1；Wherein, 2 upper surface of lower plate offers 3 locating slots 1, and upper plate 1 is under
The two sides of plate 2 offer locating slot 2 10；
Valve 7, small point of valve 1, small point of valve 2 12 is divided to be rectangular parallelepiped structure greatly；And divide valve 7, small point of valve 1 and small point greatly
The length and height of valve 2 12 are all the same, small point of valve 1 and small point of valve 2 12 it is of same size；
The side and small point of valve 1 side corresponding with valve 7 is divided greatly for dividing valve 7 greatly are provided with right angled triangle sloping platform
17；The short side of the right angled triangle sloping platform 17 is located at the rear side for dividing valve 7 Yu small point of valve 1 greatly, and short side distance is big
The upper surface shortest distance for dividing valve 7 or small point of valve 1 is 8~10mm；
Valve 7, small point of valve 1 and small point of 2 12 bottom of valve is divided to be provided with the protrusion that shape matches with locating slot one greatly
18；
The length of locating slot 2 10 and the length of left plate 3, right side plate 4 are all the same；4 inner sidewall of left plate 3 and right side plate
Boss 11 is respectively arranged on surface, the length of boss 11 is consistent with the length of locating slot 2 10, the width of boss 11 and front side
Plate 5, the height of back side panel 6 are consistent；
Distance and boss 11 width phase of two locating slots 1 in outside respectively away from 2 edge of lower plate in three locating slots 1
Together；Distance is 1.5 times of one 9 width of locating slot between each locating slot 1；
Described divides valve 7, small point of valve 1 and small point of 2 12 top front end of valve to bend downward greatly；Wherein, the horizontal ends on top
It is 160 ° that face and bending end face, which are formed by angle а, and the angle beta for bending the vertical plane formation of end face and front is 110 °；
The upper and lower part of left plate 3 and right side plate 4 offers multiple screwing through hole 13, and locating slot 2 10 and screw
The corresponding position of through-hole 13 offers screw hole 14, and left plate 3 and right side plate 4 pass through screw fixed and locating slot 2 10 respectively
On；
The inner surface of front side board 5 and back side panel 6 fits in the end face of 4 two sides of left plate 3 and right side plate, and front side board respectively
5 and the lower surface of back side panel 6 be bonded respectively with the upper surface of lower plate 2；The front-end and back-end of front side board 5 and back side panel 6 open up
There are screw or rivet through-hole 15；Front side board 5 is fixedly connected with back side panel 6 by screw or rivet through-hole 15；
The left and right ends of upper plate 1 and lower plate 2 offer screw or rivet through-hole 16, and pass through screw or rivet through-hole 16
It is fixedly connected.
Specific embodiment 5: present embodiment is unlike specific embodiment four: the laying angle and pre-
Leaching material dosage refers specifically to:
The angle and prepreg dosage condition of blasting bolt box backboard are as follows: 90 °: 45 °: -45 °=50%:25%:
25%；
The angle and prepreg dosage condition of blasting bolt box inclined plate are as follows: 90 °: 45 °: -45 °=50%:25%:
25%；
The angle and prepreg dosage condition of blasting bolt box top plate are as follows: 0 °: 90 °: 45 °: -45 °=25%:25%:
25%:25%.
It is other identical as specific embodiment four.
Specific embodiment 6: present embodiment is unlike specific embodiment four: the laying angle and pre-
Leaching material dosage refers specifically to:
The angle and prepreg dosage condition of blasting bolt box backboard are as follows: 90 °: 45 °: -45 °=50%:25%:
25%；
The angle and prepreg dosage condition of blasting bolt box inclined plate are as follows: 90 °: 45 °: -45 °=80%:10%:
10%；
The angle and prepreg dosage condition of blasting bolt box top plate are as follows: 0 °: 90 °: 45 °: -45 °=25%:25%:
25%:25%.
It is other identical as specific embodiment four.
Specific embodiment 7: present embodiment is unlike specific embodiment four: the thickness refers to composite wood
Expect the backboard of blasting bolt box, the thickness of inclined plate and top plate, respectively 13mm, 9mm and 30mm.Other and specific embodiment four
It is identical.
Specific embodiment 8: present embodiment is unlike specific embodiment four: the prepreg is carbon fiber
Tie up prepreg.It is other identical as specific embodiment four.
Specific embodiment 9: present embodiment is unlike specific embodiment four: before starting laying prepreg,
In the working face and 17 surface of right angled triangle sloping platform coating release agent for dividing valve 7, small point of valve 1 and small point of valve 2 12 greatly.Its
It is identical as specific embodiment four.
The content of present invention is not limited only to the content of the respective embodiments described above, the group of one of them or several specific embodiments
The purpose of invention also may be implemented in contract sample.
Beneficial effects of the present invention are verified by following embodiment:
Embodiment 1
1, blasting bolt box structure
The composite material blasting bolt box of the present embodiment is (see Fig. 1 to the high 200mm of Fig. 6), wide 170mm, by top plate 1a, explosion
Bolt box backboard 2a, two blasting bolt box inclined plate 3a are constituted；There are two quick-fried and fried spiral shells for the installation of the blasting bolt box two sides backboard 2a
Bolt box inclined plate 3a；Top plate 1a is provided at the top of blasting bolt box backboard 2a and two blasting bolt box inclined plate 3a；The top
The center plate 1a offers blasting bolt connecting hole 4a；The center blasting bolt box backboard 2a offers lightening hole 5a；
It is 160 ° that the vertical portion and bending part of the blasting bolt box backboard 2a, which is formed by angle а, bending part
Dividing the angle beta formed with top plate 1a is 110 °；
Several screws or rivet through-hole 6a are offered on the blasting bolt box backboard 2a.
The blasting bolt box of the present embodiment can be prepared by aluminium alloy or carbon fiber.
2, blasting bolt box testpieces (hereinafter referred to as testpieces) molding die designs
According to blasting bolt box shaped, blasting bolt box testpieces molding die, which uses, divides lobed formula.Molding die is whole
Including lower plate 2, divide valve 7, small point of valve 1, small point of valve 2 12, left plate 3, right side plate 4, front side board 5, back side panel 6 and upper plate greatly
1；Wherein, 2 upper surface of lower plate offers 3 locating slots 1, and the two sides of upper plate 1 and lower plate 2 offer locating slot 2 10；At
The form schematic diagram of pattern tool is as shown in Figure 7 and Figure 8.
2 upper surface of molding die lower plate offers 3 locating slots 1, divides valve 7, small point of valve 1 and small point greatly for positioning
Valve 2 12；Upper plate 1 and lower plate 2 each side open a locating slot 2 10, for positioning left plate 3, right side plate 4 and upper plate
1, the positional relationship of lower plate 2；Dividing 7 side of valve and small point of valve 1 and small point of 2 12 single side of valve greatly, to inclined plate 3, there are 1/2
Thickness, to guarantee the thickness of inclined plate 3；Pass through the above positioning relation, it is ensured that position, thickness and the test of testpieces inclined plate 3
The size of part left and right directions.
After left plate 3, right side plate 4 and upper plate 1, lower plate 2 position, front side board 5 and back side panel 6 are just positioned, it in this way can be with
Guarantee test part size in the front-back direction；Meanwhile 11 thickness of boss of left plate 3 and right side plate 4 and front side board 5 and back side panel 6
Height be consistent, for the size of location test part up and down direction.
3, blasting bolt box testpieces Lay up design
According to the stress condition and Finite element analysis results to each position of blasting bolt box, optimization design blasting bolt box
The carbon fiber laying angle and dosage (being shown in Table 1) of backboard, top plate and two inclined plate each sections.
1 blasting bolt box carbon fiber laying angle of table and use scale
| Region | Laying (°) |
| Backboard 13mm | 90 °: 45 °: -45 °=50%:25%:25% |
| Inclined plate 9mm | 90 °: 45 °: -45 °=50%:25%:25% |
| Top plate 30mm | 0 °: 90 °: 45 °: -45 °=25%:25%:25%:25% |
4, prepared by testpieces
One, according to by laying angle and prepreg dosage needed for blasting bolt box in table 1, dividing valve 7, small point of valve greatly respectively
1 and small point of valve 2 12 one layer of prepreg of working face elder generation laying；Due to dividing valve 7, small point of valve 1 and small point of 2 12 side of valve greatly
There is the structure of right angled triangle sloping platform 17 in face, after three is grouped together, is dividing valve 7 and small point of valve 1, small point of valve two greatly
There are gap between 12, prepreg is mainly filled this gap, prepares the inclined plate 3 of blasting bolt box by this step, and in laying
Dividing the working face of valve 7, small point of valve 1 and small point of valve 2 12 that can be laid with a thin layer of prepreg greatly when prepreg, but
It is the thickness requirement that this prepreg can not reach table 1 dorsulum and top plate, it is also necessary to continue to be laid with prepreg in step 3
To reach the thickness requirement of table 1 dorsulum and top plate；(as shown in Figure 9)
Two, divide the good prepreg of laying to valve 7, small point of valve 1 and small point of valve 2 12 greatly, be respectively placed at the 3 of lower plate 2
In a locating slot 1；(as shown in Figure 10)
Three, after previous step says that each point of valve is installed in locating slot 1, divide valve 7, small point of valve 1 and small point of valve 2 12 greatly
It is just fixed between each other, so that the prepreg being filled in three gap is also just fixed, the preliminary inclined plate for completing blasting bolt box
3 preparation, next in the working face for dividing valve 7, small point of valve 1 and small point of valve 2 12 to be laid with a thin layer of prepreg greatly
On, continue remaining pre- according to whole laying is carried out by laying angle and prepreg dosage needed for blasting bolt box in table 1 and thickness
Leaching material (cover portion) requires in table 1 so that the prepreg thickness of backboard and top plate after being laid with reaches, and the thickness of inclined plate,
Since the thickness of prior right angled triangle sloping platform 17 has been set, after filling prepreg, the inclined plate thickness of preparation
Meet the requirement of table 1；(as shown in figure 11)
Four, it molds
A, by 4 opsition dependent relationship of left plate 3 and right side plate, installation left plate 3 and 4 lower end of right side plate are placed at lower plate 2
Two sides locating slot 2 10 in, it is fixed by screwing through hole 13 and 2 two sides of lower plate that 4 lower part of left plate 3 and right side plate is arranged in
Screw hole 14 in the slot 2 10 of position, it is respectively that left plate 3 and right side plate 4 and lower plate 2 is fixed using bolt；(as shown in figure 12)
B, it by 6 opsition dependent relationship of front side board 5 and back side panel, is placed in lower plate 2, makes the following table of front side board 5 and back side panel 6
Face is bonded the upper surface of lower plate 2；Front side board 5 and 6 inner surface of back side panel are close to close the end of left plate 3 and 4 two sides of right side plate
Face, and the screw by the way that 6 rear and front end of front side board 5 and back side panel is arranged in or rivet through-hole 15 are fixed；(as shown in figure 13)
C, opsition dependent relationship installs upper plate 1, and left plate 3 and 4 upper end of right side plate are placed in the locating slot of 1 two sides of upper plate respectively
In 2 10, by being arranged in the 1 two sides locating slot 2 10 of screwing through hole 13 and upper plate on 4 top of left plate 3 and right side plate
Screw hole 14, it is respectively that left plate 3 and right side plate 4 and upper plate 1 is fixed using bolt；(as shown in figure 14)
D, by the way that the screw or rivet through-hole 16 of 2 left and right ends of upper plate 1 and lower plate is arranged in, with screw or rivet by upper plate
1 and lower plate 2 it is fixed；
Five, the molding die for having molded step 4, which is put into curing oven, is heated, is solidified；
Six, it is demoulded；
Seven, the testpieces after demoulding is machined, opens up blasting bolt connecting hole, lightening hole and screw or riveting
Follow closely through-hole；(as shown in figure 15).
Firstly, carry out finite element model analysis (analogue simulation) to the blasting bolt box of above-mentioned preparation, by sunykatuib analysis,
The prepared blasting bolt box performance of preliminary judgement, Ji Suoying improvements.Then further verified by stretching bearing test,
The performance of blasting bolt box.
5, testpieces finite element model analysis
According to blasting bolt box digital-to-analogue, the analysis of stiffness and strength is carried out to composite material blasting bolt box.Composite material
King-bolt is connected on blasting bolt box and loads lotus, and 14 stove bolts are set on 14 screws or rivet through-hole 6 and are constrained.
5.1, finite element model is established
Model is established using ANSYS finite element software, unit selects SHELL99 unit simulation composite laminated plate knot
Structure.SHELL99 is a linear layer structure shell unit, can be used for analyzing using multilayered structure shell model.
Composite material blasting bolt box increases steel plate, king-bolt and stove bolt and simulates actual loading conditions, and such as Figure 24 is sat
The setting of mark system is as follows:
Origin: blasting bolt box backboard bottom edge center；
X-axis: it is parallel to blasting bolt box slab；
Y-axis: it is parallel to blasting bolt box backboard；
Z axis: perpendicular to blasting bolt box backboard.
Use SHELL99 layer unit simulate practical laying (Preliminary design is 90 °: 45 °: -45 °=25%:37.5%:
37.5%) situation.By 150000N tensile test.
5.2, material and mass property
Composite material blasting bolt box is carbon fiber resin composite material laminated plate structure, with reference to Unidirectional Composites
Energy parameter, performance parameter are shown in Table 5.
Table 5T800/TDE85 performance parameter
| Longitudinal modulus | 140GPa |
| Transverse modulus | 9GPa |
| Modulus of shearing | 4.8GPa |
| Poisson's ratio | 0.3 |
| Longitudinal tensile strength | 2100MPa |
| Longitudinal compressive strength | 950MPa |
| Transverse tensile strength | 25MPa |
| Transverse compression intensity | 190MPa |
| Shear strength | 50MPa |
| Density | 1600Kg/m3 |
5.3, failure criteria
Using maximum stress failures criterion, determine whether single layer fails.
The maximum stress failure criteria of single layer is expressed from the next:
σ1=Xt(when compression | σ1|=Xc)
σ2=Yt(when compression | σ2|=YC)
|τ12|=S
This formula shows that positive any one the axial stress of single layer divides when single layer is under any stress state of plane stress
When amount reaches the limit of stress, single layer just fails.
5.4, calculated result
5.4.1, displacement calculated result
Combination maximum displacement calculated result is 0.8mm.X is shown in Figure 25, Y-direction maximum displacement to maximum displacement distribution calculated result
Distribution calculated result is shown in Figure 26, and Z-direction maximum displacement distribution calculated result is shown in Figure 27, and combination maximum displacement distribution calculated result is shown in figure
28.As it can be seen that Z-direction maximum displacement is located at load king-bolt hole, Y-direction maximum displacement and combination maximum displacement are located at slab upper limb
Place.
5.4.2, stress criterion check result
Maximum stress criterion check value is 1.8, is occurred near bolt hole.Maximum stress criterion is checked Distribution value cloud atlas and is seen
Figure 29.Maximum stress criterion is checked more than 1, then can be determined that as single layer failure.Distribution value cloud is checked according to maximum stress criterion
Figure can determine that single layer invalid position occurs near load king-bolt hole.
5.4.3, single layer stress calculating results
Distribution value cloud atlas is checked according to maximum stress criterion, it is determined that single layer invalid position occurs near bolt hole, but
Also need which direction single layer stress failures determination is.According to single layer all directions components of stress calculated result (see Figure 30, Figure 31,
Figure 32, Figure 33, Figure 34), it is seen then that nearby stress is higher in load king-bolt hole, 90 degree of tensile stresses, inplane shears around bolt hole
Stress, interlayer shear stress are higher, it may occur however that glue-line cracking.
5.4.4, finite element analysis conclusion
By applying finite element analysis when 150000N pulling force to composite material blasting bolt box, it is known that, blasting bolt box
With good bearing capacity.
6, carbon fiber testpieces load test
In order to study stiffness characteristics, failure mode, carrying effect of the carbon fibre composite when by larger concentrfated load
Rate and the feasibility of blasting bolt box of the present invention are tested as follows.
6.1, prepare the material that carbon fiber testpieces is loaded according to the mating table of table 3.
3 test tool of table produces mating table
6.2, test load requires
Tension test include rigid boundary condition and etc. two class of rigidity boundary condition test.Figure 22 is rigid boundary condition's dress
Set schematic diagram, the rigidity boundary condition experimental rig schematic diagram such as Figure 23 is.
Load requires: carrying out load test according to the following table 4 in test.
4 load table of table
Measurement request: testpieces pastes foil gauge, to measure the strain in loading procedure；It is measured and is loaded using displacement meter
The displacement of specified point in the process；Testpieces uses acoustic emission detection method to carry out the damage process of testpieces during loading
Detection.
7, testpieces tensile property is tested
Load test is carried out to aluminum alloy test part and carbon fiber testpieces respectively, the ultimate load of testing experiment part refers to
Fixed point strain and displacement and failure mode etc..
7.1, Al-alloy parts load test
Aluminum alloy test part only does rigid boundary and stretches bearing test, and the experimental rig built certainly is as shown in figure 16.The examination
Experiment device is made of the part such as hydraulic cylinder, tension sensor, displacement sensor and strain measurement system.Strain measurement point is as schemed
Shown in 17, amount to 20 measurement points.
The strain (1~8# measurement point) of aluminum alloy test part and displacement measurement curve are as shown in Figure 18 and Figure 19.Due to liquid
It is 20 tons that cylinder pressure maximum, which does power, and for the sake of security, the maximum load of this test is 18 tons.
7.2, carbon fiber testpieces is tested
The testpieces stretching clamp and tensile test apparatus of design are required according to tension test.And is carried out to testpieces
One-off drawing tests (backboard, inclined plate and the top plate thickness of the tension test are respectively less than the thickness of table 2), and testpieces collapse state is such as
Shown in Figure 20.
After testing for the first time, inclined plate 3a and backboard 2a are as excellent as before, destroy position and occur in top plate 1a, breakoff phenomenon is layer
Between crack.
According to such phenomenon, increase bolt in the corresponding position top plate 1a, the backboard, inclined plate and top plate of blasting bolt box is thick
Degree becomes the thickness requirement of table 2, and has carried out second of tension test.
When second of test, breaking load is improved.Breakoff phenomenon is to send out in top plate 1a and the junction inclined plate 3a and top plate 1a
Raw cracking (see Figure 21).Illustrate that the improvement project after testing for the first time plays positive effect.
Therefore, it on the basis of last time testing improvement project, continues growing and increases bolt in top plate 1a delamination position.And
And the ratio of 90 ° of layings of inclined plate 3a is improved, 80% is increased to from 50%.Blasting bolt box backboard 2a, top plate 1a and two
Carbon fiber laying angle and the dosage adjustment of inclined plate 3a each section are shown in Table 2.
Second of the test after-explosion bolt box carbon fiber laying angle of table 2 and use scale
| Region | Laying (°) |
| Backboard 13mm | 90 °: 45 °: -45 °=50%:25%:25% |
| Inclined plate 9mm | 90 °: 45 °: -45 °=80%:10%:10% |
| Top plate 30mm | 0 °: 90 °: 45 °: -45 °=25%:25%:25%:25% |
It follows that can reach very after the blasting bolt box of the present embodiment is by adjusting ply stacking angle and fiber consumption
Good stretch-proof effect.
Claims (8)
1. a kind of blasting bolt box, it is characterised in that it is by top plate (1a), blasting bolt box backboard (2a), two blasting bolt boxes
Inclined plate (3a) is constituted；There are two blasting bolt box inclined plates (3a) for the installation of the blasting bolt box backboard two sides (2a)；Blasting bolt box back
Top plate (1a) is provided at the top of plate (2a) and two blasting bolt box inclined plates (3a)；Described center top plate (1a) offers quick-fried
Fried bolt connecting hole (4a)；Described center blasting bolt box backboard (2a) offers lightening hole (5a)；
It is 160 that the vertical portion and bending part of the blasting bolt box backboard (2a), which are formed by angle а,o, bending part with
The angle beta that top plate (1a) is formed is 110o；
Several screws or rivet through-hole (6a) are offered on the blasting bolt box backboard (2a)；
A kind of blasting bolt box, it is prepared using blasting bolt box molding die, the specific steps are as follows:
One, according to laying angle and prepreg dosage needed for preparing blasting bolt box, dividing valve (7), small point of valve one (8) greatly respectively
With the working face laying prepreg of small point of valve two (12)；
Two, divide the good prepreg of laying to valve (7), small point of valve one (8) He little Fen valve two (12) greatly, be respectively placed at lower plate (2)
3 locating slots one (9) in；
Three, step 1 divide greatly valve (7), small point of two (12) working face laying of valve one (8) He little Fen valve prepreg on the basis of,
By laying angle needed for blasting bolt box and prepreg dosage and thickness requirement, continue laying prepreg；
Four, it molds
A, left plate (3) and right side plate (4) lower end are placed in the two sides locating slot two (10) of lower plate (2), by being arranged on a left side
The screwing through hole (13) and the screw hole in lower plate (2) two sides locating slot two (10) of side plate (3) and right side plate (4) lower part
(14), respectively that left plate (3) and right side plate (4) and lower plate (2) is fixed using bolt；
B, front side board (5) and back side panel (6) are placed on lower plate (2), keep the lower surface of front side board (5) and back side panel (6) equal
It is bonded the upper surface of lower plate (2)；Front side board (5) and back side panel (6) inner surface are bonded left plate (3) and right side plate (4) two sides
End face, and use screw or rivet, by be arranged front side board (5) and back side panel (6) rear and front end screw or rivet lead to
Hole (15) is fixed；
C, left plate (3) and right side plate (4) upper end are placed in the locating slot two (10) of upper plate (1) two sides respectively, pass through setting
Screw hole in the screwing through hole (13) and upper plate (1) two sides locating slot two (10) on left plate (3) and right side plate (4) top
(14), respectively that left plate (3) and right side plate (4) and upper plate (1) is fixed using bolt；
It d, will be upper with screw or rivet by setting in the screw or rivet through-hole (16) of upper plate (1) and lower plate (2) left and right ends
Plate (1) and lower plate (2) are fixed；
Five, the molding die for having molded step 4, which is put into curing oven, is heated, is solidified；
Six, it is demoulded；
Seven, the testpieces after demoulding is machined, opens up blasting bolt connecting hole, lightening hole and screw or rivet is logical
Hole；
The blasting bolt box molding die includes lower plate (2), divides valve (7), small point of valve one (8), small point of valve two (12), a left side greatly
Side plate (3), right side plate (4), front side board (5), back side panel (6) and upper plate (1)；Wherein, lower plate (2) upper surface offers 3 and determines
The two sides of position slot one (9), upper plate (1) and lower plate (2) offer locating slot two (10)；
Valve (7), small point of valve one (8), small point of valve two (12) is divided to be rectangular parallelepiped structure greatly；And divide valve (7), small point of valve one (8) greatly
And the length and height of small point of valve two (12) are all the same, small point of valve one (8) He little Fen valve two (12) it is of same size；
The side of valve (7) and small point of valve one (8) side corresponding with valve (7) are divided greatly is divided to be provided with right angled triangle greatly oblique
Platform (17)；The short side of the right angled triangle sloping platform (17) is located at the rear side for dividing valve (7) and small point of valve one (8) greatly, and
Short side distance divides the upper surface shortest distance of valve (7) or small point of valve one (8) to be 8~10mm greatly；
Valve (7), small point of two (12) bottom of valve one (8) He little Fen valve is divided to be provided with the protrusion that shape matches with locating slot one greatly
(18)；
The length of locating slot two (10) and the length of left plate (3), right side plate (4) are all the same；Left plate (3) and right side plate (4)
It is respectively arranged in interior side-wall surface boss (11), the length of boss (11) is consistent with the length of locating slot two (10), boss
(11) width is consistent with the height of front side board (5), back side panel (6)；
Distance and boss (11) of two locating slots one (9) in outside respectively away from lower plate (2) edge are wide in three locating slots one (9)
It spends identical；Distance is 1.5 times of locating slot one (9) width between each locating slot one (9)；
Described divides valve (7), small point of valve one (8) and small point of valve two (12) top front end to bend downward greatly；Wherein, the level on top
It is 160 ° that end face and bending end face, which are formed by angle а, and the angle beta for bending the vertical plane formation of end face and front is 110 °；
The upper and lower part of left plate (3) and right side plate (4) offers multiple screwing through hole (13), and locating slot two (10) with
The corresponding position of screwing through hole (13) offers screw hole (14), and left plate (3) and right side plate (4) are fixed respectively by screw
On locating slot two (10)；
The inner surface of front side board (5) and back side panel (6) fits in the end face of left plate (3) and right side plate (4) two sides respectively, and preceding
The lower surface of side plate (5) and back side panel (6) is bonded with the upper surface of lower plate (2) respectively；Before front side board (5) and back side panel (6)
End and rear end offer screw or rivet through-hole (15)；Front side board (5) and back side panel (6) pass through screw or rivet through-hole (15)
It is fixedly connected；
The left and right ends of upper plate (1) and lower plate (2) offer screw or rivet through-hole (16), and pass through screw or rivet through-hole
(16) it is fixedly connected.
2. a kind of blasting bolt box according to claim 1, it is characterised in that the blasting bolt box backboard (2a)
With a thickness of 13mm；Blasting bolt box inclined plate (3a) is with a thickness of 9mm；Top plate (1a) is with a thickness of 30mm.
3. a kind of blasting bolt box according to claim 1, it is characterised in that blasting bolt box is made of using carbon fiber
's.
4. a kind of blasting bolt box according to claim 1, it is characterised in that the laying angle and prepreg dosage
It refers specifically to:
The angle and prepreg dosage condition of blasting bolt box backboard are as follows: 90 °: 45 °: -45 °=50%:25%:25%；
The angle and prepreg dosage condition of blasting bolt box inclined plate are as follows: 90 °: 45 °: -45 °=50%:25%:25%；
The angle and prepreg dosage condition of blasting bolt box top plate are as follows: 0 °: 90 °: 45 °: -45 °=25%:25%:25%:
25%.
5. a kind of blasting bolt box according to claim 1, it is characterised in that the laying angle and prepreg dosage
It refers specifically to:
The angle and prepreg dosage condition of blasting bolt box backboard are as follows: 90 °: 45 °: -45 °=50%:25%:25%；
The angle and prepreg dosage condition of blasting bolt box inclined plate are as follows: 90 °: 45 °: -45 °=80%:10%:10%；
The angle and prepreg dosage condition of blasting bolt box top plate are as follows: 0 °: 90 °: 45 °: -45 °=25%:25%:25%:
25%.
6. a kind of blasting bolt box according to claim 1, it is characterised in that the thickness refers to composite material explosion spiral shell
The thickness of the backboard of bolt box, inclined plate and top plate, respectively 13mm, 9mm and 30mm.
7. a kind of blasting bolt box according to claim 1, it is characterised in that the prepreg is carbon fiber prepreg.
8. a kind of blasting bolt box according to claim 1, it is characterised in that before starting laying prepreg, dividing valve greatly
(7), the working face and right angled triangle sloping platform (17) surface coating release agent of small point of valve one (8) He little Fen valve two (12).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409875A (en) * | 2020-03-19 | 2020-07-14 | 上海卫星工程研究所 | Composite material bearing structure suitable for space vehicle separation cabin section |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109911246B (en) * | 2019-02-20 | 2021-02-02 | 上海卫星工程研究所 | Composite material structure suitable for point-type connection spacecraft |
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|---|---|---|---|---|
| US5463957A (en) * | 1994-05-26 | 1995-11-07 | Lockheed Missiles & Space Company, Inc. | Inflatable nose fairing |
| RU2399018C1 (en) * | 2009-03-18 | 2010-09-10 | Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр имени М.В. Хруничева" | Fitting and method of its fabrication |
| CN203464858U (en) * | 2013-08-22 | 2014-03-05 | 北京宇航系统工程研究所 | Combined explosive bolt box structure capable of releasing pressure in sliding manner |
| CN204881355U (en) * | 2015-06-19 | 2015-12-16 | 北京宇航系统工程研究所 | Compound explosion bolt box structure |
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2017
- 2017-08-16 CN CN201710703074.5A patent/CN107253337B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5463957A (en) * | 1994-05-26 | 1995-11-07 | Lockheed Missiles & Space Company, Inc. | Inflatable nose fairing |
| RU2399018C1 (en) * | 2009-03-18 | 2010-09-10 | Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр имени М.В. Хруничева" | Fitting and method of its fabrication |
| CN203464858U (en) * | 2013-08-22 | 2014-03-05 | 北京宇航系统工程研究所 | Combined explosive bolt box structure capable of releasing pressure in sliding manner |
| CN204881355U (en) * | 2015-06-19 | 2015-12-16 | 北京宇航系统工程研究所 | Compound explosion bolt box structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409875A (en) * | 2020-03-19 | 2020-07-14 | 上海卫星工程研究所 | Composite material bearing structure suitable for space vehicle separation cabin section |
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