CN110186319A - A kind of small-bore muzzle brake of double-layered cylinder rectification type and its manufacturing method - Google Patents
A kind of small-bore muzzle brake of double-layered cylinder rectification type and its manufacturing method Download PDFInfo
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- CN110186319A CN110186319A CN201910384256.XA CN201910384256A CN110186319A CN 110186319 A CN110186319 A CN 110186319A CN 201910384256 A CN201910384256 A CN 201910384256A CN 110186319 A CN110186319 A CN 110186319A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/70—Recycling
- B22F10/73—Recycling of powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/32—Muzzle attachments or glands
- F41A21/36—Muzzle attachments or glands for recoil reduction ; Stabilisators; Compensators, e.g. for muzzle climb prevention
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- General Engineering & Computer Science (AREA)
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Abstract
The invention belongs to firearms field, the small-bore muzzle brake of especially a kind of double-layered cylinder rectification type and its manufacturing method.Muzzle brake is integrated centrosymmetric structure, including outer layer sleeve and inner layer cylinder；Inner layer cylinder rear portion is bottom end, and front is stack shell, and the internal diameter of inner layer cylinder stack shell is greater than the internal diameter of bottom end, and inner layer cylinder stack shell is equipped with multiple groups waist type side opening；Outer layer sleeve is set in the periphery of inner layer cylinder, and outer layer sleeve is followed successively by stack shell, front end face and central shell hole, the decrement of front end face internal diameter, and the internal diameter of outer layer sleeve stack shell is fixed and be less than to central shell hole internal diameter, and the stack shell of outer layer sleeve is equipped with multiple groups outer layer circular hole；The stack shell overlapping of the stack shell and inner layer cylinder of outer layer sleeve, and pass through link of boards on the inside of the stack shell of outer layer sleeve and on the outside of the stack shell of inner layer cylinder.Overall structure uses 3D printing technique figuration manufacture.The rectified action that the present invention uses double-layer porous structure to play dispersion to powder gases, dredge, may be implemented the low shock wave of gun muzzle and endangers benefit.
Description
Technical field
The invention belongs to firearms cannon technical field, the small-bore muzzle brake of especially a kind of double-layered cylinder rectification type and
Its manufacturing method.
Background technique
Small-bore muzzle brake is commonly used in being mounted on aircraft gun barrel front end, by the stream for controlling after effect period powder gases
Amount distribution reduces Canon launching recoil with air velocity, and provides system for barrel and move back power, to reduce gun carriage load and to shooting
The impact of platform.
Due to casting or forging the limitation of processing technology, traditional muzzle brake of practical application is relatively simple for structure.It presses
According to structure type, traditional muzzle brake structure can be divided into impact type, reaction-type and three kinds of impact-reaction-type.Impact type
Muzzle brake chamber diameter is larger, with the reflecting curtain of hypsokinesis form in chamber, after effect period powder gases enter chamber with
Expansion rapidly afterwards, therefore rely primarily on high-speed gas and power is moved back to the percussion offer system of reflecting curtain.Reaction-type gun muzzle system
Move back that device chamber diameter is smaller, without or only very little reflecting curtain, after effect period powder gases cannot be sufficiently swollen after entering chamber
It is swollen, elevated pressures are kept, are sprayed backward through lateral spread spray orifice high speed, form reaction force to provide forward punching for cannon
Amount.Reaction-type muzzle brake chamber size is impacted between two kinds of muzzle brakes, and after effect period powder gases enter chamber
After room, restriction of the acceleration degree by chamber area is expanded, so that side opening, which plays reexpansion, accelerates and distribute flow
Effect.
Muzzle brake also tends to the variation for causing muzzle flowfield superpressure to be distributed while providing system for cannon and moving back power,
The negative effect for causing cannon mouth region domain shock wave to endanger.In traditional muzzle brake use process, powder gases move back system
Device baffle directly sprays after generating percussion to post deflection, or after the shunting of hypsokinesis side opening backward, often in gun muzzle
Biggish shock wave is caused negatively to endanger in lateral and rear.
The structure design of muzzle brake directly affects its recoil efficiency and negative harm performance.Conventional cast or forging method limit
The degrees of freedom for having made the design of muzzle brake structure, therefore, it is difficult to realize as small as possible while guaranteeing recoil efficiency
Muzzle blast endangers benefit.In addition, often performance is bad for conventional cast muzzle brake, then there is system in forging muzzle brake
The disadvantages of making time-consuming, higher cost.
Summary of the invention
Technical problem solved by the invention be to provide a kind of small-bore muzzle brake of double-layered cylinder rectification type and its
Manufacturing method.
The technical solution for realizing the aim of the invention is as follows:
Muzzle brake described in a kind of small-bore muzzle brake of double-layered cylinder rectification type is integrated centrosymmetric structure, including
Outer layer sleeve and inner layer cylinder；
The inner layer cylinder rear portion is bottom end, and front is stack shell, and the internal diameter of inner layer cylinder stack shell is greater than the internal diameter of bottom end, interior
Layer cylinder stack shell is equipped with multiple groups waist type side opening；
The outer layer sleeve is set in the periphery of inner layer cylinder, outer layer sleeve be followed successively by from back to front stack shell, front end face and
Central shell hole, the decrement of front end face internal diameter, central shell hole internal diameter are fixed and are less than the internal diameter of outer layer sleeve stack shell, the cylinder of outer layer sleeve
It is equipped with multiple groups outer layer circular hole with it；
The stack shell overlapping of the stack shell and inner layer cylinder of the outer layer sleeve, and the stack shell inside of outer layer sleeve and inner layer cylinder
Stack shell on the outside of pass through link of boards.
Further, the bottom end is equipped with internal screw thread, constitutes screw thread pair with gun barrel head external screw thread and connect；In described
The internal diameter of layer cylinder stack shell is not less than gun barrel bore.
Further, the multiple groups waist type side opening is centrosymmetric distribution about muzzle brake axis, every group of waist type side opening packet
Include the column along muzzle brake axis, every group of waist type side opening is equally spaced multiple and different hypsokinesis angles and face along muzzle brake axis direction
Long-pending waist type side opening, the waist type side opening back rake angle and area in every group of waist type side opening close to gun muzzle end face are minimum, single waist type side
Hole circumferential lengths are not more than gun barrel bore.
Further, the waist type side opening is 3 groups, and the angle between every group of adjacent waist type side opening is 120 °, every group of waist
Type side opening is 3.
Further, the multiple groups outer layer circular hole is symmetrical about muzzle brake axis centre, and every group of outer layer circular hole includes
Along the multiple row of muzzle brake axis, each column outer layer circular hole includes several outer layer circular holes by being equally spaced along muzzle brake axis direction
Composition, outer layer Circularhole diameter are not more than the 1/6 of gun barrel bore.
Further, the outer layer circular hole is 3 groups, and every group of outer layer circular hole includes two column, and each column outer layer circular hole includes 5.
Further, the front end face is provided with multiple front end face waist types symmetrical about muzzle brake axis centre
Hole, front end face waist-shaped hole circumferential lengths are not less than the 2/3 of gun barrel bore.
Further, the internal diameter of the central shell hole is not less than gun barrel bore；Each group internal layer waist on inner layer cylinder
Each group outer layer circular hole, front end face waist-shaped hole and each group gusset on type side opening, outer layer sleeve is symmetrical along muzzle brake axis centre
The angle and group number of distribution are identical.
A method of the above-mentioned small-bore muzzle brake of double-layered cylinder rectification type being prepared, using metal powder 3D printing
Method manufacture.
Further, the specific steps are as follows:
Step 1: selection substrate spreads the metal powder to be printed for not crossing substrate in 3D printing working chamber；
Step 2: the muzzle brake model data and scanning strategy information pre-entered according to computer, in argon gas or
Laser beam irradiation and scanning metal powder, powder rapid melting and solidify after absorbing laser energy under nitrogen protection, formation
The middle layer of one layer of target drip molding；
Step 3: supplementing one layer of metal powder to be printed by 3D printing equipment scraper plate again from usable material chamber, does not cross and has become
Shape surface is continued to scan on according to model information with laser beam again, melts metal powder layer；
Step 4: step 3 is repeated, finally by the layer-by-layer printing-forming of target part；
Step 5: after the completion of printing clearing and retrieving excess metal powder and by printout from substrate separate, obtain gun muzzle system
Move back device.
Compared with prior art, the present invention its remarkable advantage is as follows:
(1) the small-bore muzzle brake of the double-deck rectification type of the invention, inner layer cylinder have multiple groups about big gun axis center pair
Claim the waist type side opening of distribution, the outer layer circular hole that outer layer sleeve has multiple groups symmetrical along big gun axis center.From system when Canon launching
After moving back device internal layer waist type side opening sideway diversion, again by the interaction of layer structure, array arrangement on outer layer sleeve
Outer layer circular hole plays the rectified action dredged, dispersed to the powder gases of lateral flow, to inhibit gun muzzle laterally compared with thump
The formation of wave.
(2) the small-bore muzzle brake of the double-deck rectification type of the invention, every group of internal layer waist type side opening are equidistant along big gun axis direction
The side opening hypsokinesis angle of distribution is different from area, and the internal layer waist-shaped hole area and back rake angle close to muzzle brake bottom end are smaller, thus
The development of gun muzzle side rear impact wave can be limited.Internal layer waist-shaped hole area and back rake angle close to muzzle brake front end is larger, has
Conducive to the sideway diversion of powder gases, reduce the powder gases flow of central shell hole, to realize higher recoil efficiency.
(3) the small-bore muzzle brake of the double-deck rectification type of the invention, front end face is provided with symmetrically to be divided about big gun axis center
Multiple front end face waist-shaped holes of cloth can carry out sideway diversion to the powder gases for flowing to muzzle brake head again, thus further
Reduce central shell hole flow, reduce recoil, and helps to reduce the percussion that muzzle brake outer layer sleeve front end face is subject to.
(4) the small-bore muzzle brake of the double-deck rectification type of the invention carries out one using metal powder 3D printing technique
Forming, it is easy to manufacture, while can realize the near-net-shape of labyrinth, stock utilization is high, and production process is environmentally protective.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 muzzle brake general structure schematic diagram of the present invention.
Fig. 2 muzzle brake cross-sectional view of the present invention.
Canon launching muzzle flowfield superpressure distribution values simulate monitoring result when Fig. 3 installs muzzle brake of the invention additional,
Wherein (a) be in front of gun muzzle each point pressure monitoring as a result, figure (b) be gun muzzle laterally and rear each point pressure monitoring result.
Fig. 4 be withouyt when muzzle brake Canon launching muzzle flowfield superpressure distribution values simulate monitoring result, wherein
Figure (a) be in front of gun muzzle each point pressure monitoring as a result, figure (b) be gun muzzle laterally and rear each point pressure monitoring result.
Description of symbols:
1- outer layer sleeve, 2- outer layer circular hole, 3- front end face waist-shaped hole, the center 4- shell hole, 5- front end face, 6- inner layer cylinder,
7- waist type side opening, 8- gusset, the bottom end 9-.
Specific embodiment
In conjunction with Fig. 1, Fig. 2, the small-bore muzzle brake of a kind of double-deck rectification type 3D printing of the invention, for integrated center
Symmetrical structure has inner layer cylinder 6 and outer layer sleeve 1.
It is positive reference with gun muzzle direction, 9 medial surface of inner layer cylinder bottom end is provided with connection screw thread, with gun barrel
Head lateral surface screw thread constitutes screw thread pair and is connected.
6 head internal diameter of inner layer cylinder is not less than barrel bore.6 head circumferential wall of inner layer cylinder is provided with multiple groups about big gun
The symmetrical waist type side opening 7 of axis center.Every group of waist type side opening 7 is equally spaced multiple and different hypsokinesis angles and face along big gun axis direction
Long-pending waist type side opening.To be minimum close to the waist type side opening back rake angle of gun muzzle end face and area in every group of waist type side opening 7.Single waist
7 circumferential lengths of type side opening are not more than gun barrel bore.Preferably, 7 groups of numbers of waist type side opening are 3, and every group of waist type side opening 7 includes number
Mesh is 3.
6 head of inner layer cylinder is connected by the multiple groups gusset 8 symmetrical about big gun axis center with 1 body portion of outer layer sleeve.
Preferably, 8 groups of numbers of gusset are 3.
1 internal diameter of outer layer sleeve is greater than 6 internal diameter of inner layer cylinder.1 body portion circumferential wall of outer layer sleeve is provided with multiple groups about big gun
The symmetrical outer layer circular hole 2 of axis center.Every group of outer layer circular hole 2 is made of several exclusive layer circular holes 2 being circumferentially equally spaced,
Per exclusive layer circular hole 2 by being formed along several outer layer circular holes that big gun axis direction is equally spaced.2 diameter of outer layer circular hole is not more than cannon
Barrel bore 1/6.Preferably, 2 groups of numbers of outer layer circular hole are 3, and every group of 2 number of rows of outer layer circular hole is 3, are 5 per exclusive layer circular hole number.
1 front end of outer layer sleeve is provided with the front end face 5 and central shell hole 4 of shrink form.Front end face 5 be provided with it is multiple about
The symmetrical front end face waist-shaped hole 3 of big gun axis center.3 circumferential lengths of front end face waist-shaped hole are not less than gun barrel bore
2/3.Preferably, front end face waist-shaped hole number is 3.
Central 4 internal diameter of shell hole is not less than barrel bore.Each group internal layer waist type side opening 7, outer layer sleeve 1 on inner layer cylinder 6
On each group outer layer circular hole 2, front end face waist-shaped hole 3 and each group gusset along the symmetrical angle of big gun axis center and group number phase
Together.
A kind of double-deck small-bore muzzle brake of rectification type 3D printing of the invention using metal powder 3D printing technique at
Shape is made.
Particularly, it can be using precinct laser fusion mode figuration manufacture.Specific forming mode is as follows:
Firstly, select material similar with printed metal powder expansion rate and thermal conductivity as substrate, 3D printing at
In shape room, the metal powder to be printed for not crossing substrate is spread.
Secondly, the muzzle brake model data and scanning strategy information that are pre-entered according to computer, in argon gas or nitrogen
Laser beam irradiation and scanning metal powder, powder rapid melting and solidify after absorbing laser energy under gas shielded, formation one
The middle layer of layer target drip molding.
Then, one layer of metal powder to be printed is supplemented again from usable material chamber by 3D printing equipment scraper plate, it is excessively not formed
Surface is continued to scan on according to model information with laser beam again, melts metal powder layer.It loops back and forth like this, finally by target
The layer-by-layer printing-forming of part.
Clearing and retrieving excess metal powder and printout is separated after the completion of printing from substrate to get to bilayer of the invention
Structure rectifying type muzzle brake.
The near-net-shape of labyrinth of the present invention can be realized by 3D printing, while stock utilization is high, production process is green
Colour circle is protected.
In conjunction with Fig. 1, Fig. 2, illustrate that the double-deck rectification type muzzle brake of the invention realizes low muzzle blast less harmful effect
The concrete principle of benefit.When Canon launching, the part that powder gases are connected through gun barrel with 6 bottom end of muzzle brake inner layer cylinder enters
6 head of inner layer cylinder.Then the expansion of major part powder gases is gone out after accelerating by each 7 sideway diversion of internal layer waist type side opening.
After powder gases pass through inner layer cylinder 6, the gap between inner layer cylinder 6 and outer layer sleeve 1 moves forward later
Process again with outer layer sleeve 1 generate interaction.At this time on outer layer sleeve 1 the outer layer circular hole 2 of array arrangement to lateral flow
Dynamic powder gases play the rectified action dredged, dispersed, to inhibit gun muzzle laterally compared with the formation of strong shock wave.Gunpowder gas
During body and outer layer sleeve 1 interact, the gusset of connection inner layer cylinder 6 and outer layer sleeve 1, which plays, ensures that structure uses
The effect of intensity.
Powder gases from gun muzzle end face along big gun axis forward flow and with internal layer waist type side opening 7 flow out during, lean on
7 area of internal layer waist type side opening and back rake angle of nearly muzzle brake bottom end are smaller, so as to limit the hair of gun muzzle side rear impact wave
Exhibition.7 area of internal layer waist type side opening and back rake angle close to muzzle brake front end is larger, is conducive to the sideway diversion of powder gases, subtracts
The powder gases flow of small center shell hole 4, to realize higher recoil efficiency.
Outer layer sleeve front end face waist-shaped hole 3 can carry out sideway diversion to the powder gases for flowing to muzzle brake head again, from
And central shell hole flow is further decreased, recoil is reduced, and help to reduce the rushing of being subject to of muzzle brake outer layer sleeve front end face 3
The effect of hitting.Outer layer sleeve front end face 5 is in contraction type, and it is circumferential freely swollen along muzzle brake after the outflow of head can to reduce powder gases
The disturbance of barrel caused by swollen and the negative effect to fire accuracy.
In conjunction with Fig. 3, Fig. 4, illustrate that low shock wave of the invention endangers benefit.Numerical-Mode is carried out to Canon launching muzzle flowfield
It is quasi-, the moment is begun as zero moment using the aftereffect beginning, is positive, Fig. 3 and figure as origin, gun muzzle axis direction using thorax mouth end face center face
4 it is respectively when installing the present invention additional, 0 °~150 ° of gun muzzle region direction when light thorax mouth, each monitoring point superpressure value at distance 0.5m and 1m
Versus time curve.
After comparison diagram 3 and Fig. 4 are as it can be seen that install the small-bore muzzle brake of double-layered cylinder rectification type 3D printing of the invention additional,
Peak overpressure becomes original 2 times or so at 0.5m immediately ahead of gun muzzle, and each monitoring point superpressure of gun muzzle field side and rear is at any time
Between the overall trend that changes and level be basically unchanged, illustrate rapid decay of the muzzle blast from muzzle brake axis to two sides.Big gun
For mouth rear peak overpressure present in 150 ° of direction 0.5m, peak overpressure only promotes about 0.1atm compared to light thorax mouth.
Comparing result shows the small-bore muzzle brake of double-layered cylinder rectification type 3D printing of the invention, for the after effect period
The Strength Changes of muzzle flowfield are presented as immediately ahead of gun muzzle and the promotion of side's smaller radial to the rear individual superpressure point peak values into range,
Illustrate that low shock wave of the invention endangers benefit.
Claims (10)
1. a kind of small-bore muzzle brake of double-layered cylinder rectification type, which is characterized in that the muzzle brake is integrated center pair
Claim structure, including outer layer sleeve (1) and inner layer cylinder (6)；
Inner layer cylinder (6) rear portion is bottom end (9), and front is stack shell, and the internal diameter of inner layer cylinder stack shell is greater than the internal diameter of bottom end,
Inner layer cylinder stack shell is equipped with multiple groups waist type side opening (7)；
The outer layer sleeve (1) is set in the periphery of inner layer cylinder (6), and outer layer sleeve (1) is followed successively by stack shell, front end from back to front
Face (5) and central shell hole (4), the decrement of front end face (5) internal diameter, central shell hole (4) internal diameter are fixed and are less than outer layer sleeve stack shell
The stack shell of internal diameter, outer layer sleeve (1) is equipped with multiple groups outer layer circular hole (2)；
The stack shell overlapping of the stack shell and inner layer cylinder (6) of the outer layer sleeve (1), and it is on the inside of the stack shell of outer layer sleeve (1) and interior
It is connected on the outside of the stack shell of layer cylinder (6) by gusset (8).
2. muzzle brake according to claim 1, which is characterized in that the bottom end (9) is equipped with internal screw thread, with gun barrel head
Portion's external screw thread constitutes screw thread pair connection；The internal diameter of the inner layer cylinder stack shell is not less than gun barrel bore.
3. muzzle brake according to claim 2, which is characterized in that the multiple groups waist type side opening (7) is about muzzle brake axis
Be centrosymmetric distribution, and every group of waist type side opening (7) includes the column along muzzle brake axis, and every group of waist type side opening (7) is along muzzle brake
Axis direction is equally spaced the waist type side opening of multiple and different hypsokinesis angles and area, close to gun muzzle end face in every group of waist type side opening
Waist type side opening back rake angle and area are minimum, and single waist type side opening (7) circumferential lengths are not more than gun barrel bore.
4. muzzle brake according to claim 3, which is characterized in that the waist type side opening (7) is 3 groups, every group of adjacent waist
Angle between type side opening (7) is 120 °, and every group of waist type side opening is 3.
5. muzzle brake according to claim 4, which is characterized in that the multiple groups outer layer circular hole (2) is about muzzle brake axis
Central symmetry distribution, every group of outer layer circular hole (2) include the multiple row along muzzle brake axis, and each column outer layer circular hole (2) includes by along system
Several outer layer circular holes composition that device axis direction is equally spaced is moved back, outer layer Circularhole diameter is not more than the 1/6 of gun barrel bore.
6. muzzle brake according to claim 5, which is characterized in that the outer layer circular hole is 3 groups, and every group of outer layer circular hole includes
Two column, each column outer layer circular hole include 5.
7. muzzle brake according to claim 6, which is characterized in that the front end face (5) is provided with multiple about muzzle brake
The symmetrical front end face waist-shaped hole (3) of axis centre, front end face waist-shaped hole (3) circumferential lengths are not less than gun barrel bore
2/3。
8. muzzle brake according to claim 7, which is characterized in that the internal diameter of the center shell hole (4) is not less than cannon body
Nozzle diameter；The each group outer layer circular hole (2) on each group internal layer waist type side opening (7), outer layer sleeve (1) on inner layer cylinder (6), front end
Face waist-shaped hole (3) and each group gusset (8) are identical along the symmetrical angle of muzzle brake axis centre and group number.
9. a kind of method for preparing the described in any item small-bore muzzle brakes of double-layered cylinder rectification type of claim 1-8,
It is characterized in that, is manufactured using metal powder 3D printing method.
10. according to the method described in claim 9, it is characterized in that, specific step is as follows:
Step 1: selection substrate spreads the metal powder to be printed for not crossing substrate in 3D printing working chamber；
Step 2: the muzzle brake model data and scanning strategy information pre-entered according to computer, in argon gas or nitrogen
Protect lower laser beam irradiation and scanning metal powder, powder rapid melting and solidifies, one layer of formation after absorbing laser energy
The middle layer of target drip molding；
Step 3: supplementing one layer of metal powder to be printed by 3D printing equipment scraper plate again from usable material chamber, excessively not formed table
Face is continued to scan on according to model information with laser beam again, melts metal powder layer；
Step 4: step 3 is repeated, finally by the layer-by-layer printing-forming of target part；
Step 5: after the completion of printing clearing and retrieving excess metal powder and by printout from substrate separate, obtain muzzle brake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910384256.XA CN110186319A (en) | 2019-05-09 | 2019-05-09 | A kind of small-bore muzzle brake of double-layered cylinder rectification type and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910384256.XA CN110186319A (en) | 2019-05-09 | 2019-05-09 | A kind of small-bore muzzle brake of double-layered cylinder rectification type and its manufacturing method |
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| CN110186319A true CN110186319A (en) | 2019-08-30 |
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| CN201910384256.XA Pending CN110186319A (en) | 2019-05-09 | 2019-05-09 | A kind of small-bore muzzle brake of double-layered cylinder rectification type and its manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695356A (en) * | 2019-11-08 | 2020-01-17 | 中国兵器装备集团自动化研究所 | Integrated projectile body manufacturing method based on powder feeding type additive manufacturing method |
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| CN110695356A (en) * | 2019-11-08 | 2020-01-17 | 中国兵器装备集团自动化研究所 | Integrated projectile body manufacturing method based on powder feeding type additive manufacturing method |
| CN110695356B (en) * | 2019-11-08 | 2021-05-14 | 中国兵器装备集团自动化研究所 | Integrated projectile body manufacturing method based on powder feeding type additive manufacturing method |
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