CN107289814B - Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel - Google Patents
Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel Download PDFInfo
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- CN107289814B CN107289814B CN201710626763.0A CN201710626763A CN107289814B CN 107289814 B CN107289814 B CN 107289814B CN 201710626763 A CN201710626763 A CN 201710626763A CN 107289814 B CN107289814 B CN 107289814B
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- Prior art keywords
- tightening
- self
- ring
- barrel
- pressure
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Classifications
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The present invention relates to movable hydraulic Self tightening devices outside a kind of firearms barrel comprising tank body；The tank body includes the upper shell and lower housing being hinged, the free end of the upper shell is provided with the first connecting plate, it is provided with U-type groove on first connecting plate, the free end of the lower housing is provided with the second connecting plate corresponding with the first connecting plate, and the fastening bolt coordinated with U-type groove is hinged on second connecting plate.The both ends of the upper shell are both provided with upper half ring, and the lower housing is provided with lower semi-ring corresponding with upper half ring, and the corresponding upper half ring and lower semi-ring are combined to form sealing ring, and the inner wall of the upper half ring and lower semi-ring is both provided with the first sealant.Inlet is provided on the upper shell, the inlet is connected to hydraulic pump by input duct, pressure-control valve is provided in the input duct.The present invention provides a kind of device and tightening method carrying out movable hydraulic self-tightening outside firearms barrel, has expanded the technological approaches for realizing barrel self-tightening.
Description
Technical field
The present invention relates to weapon development technical fields, and in particular to outside a kind of firearms barrel movable hydraulic Self tightening device and
Tightening method.
Background technology
Autofrettaged Gun Barrel has become the standard configuration of High-pressure gun at present, and part firearms gun barrel also uses Autofrettaged Gun Barrel.
Autofrettaged Gun Barrel has many good qualities with respect to monotubular barrel：Including improving barrel intensity, mitigation barrel weight, reduction barrel material etc.
Grade, raising barrel fatigue life etc..
Current tightening method is that thorax applies high pressure in barrel so that plasticity change partially or completely occurs for barrel wall
After high pressure is removed, residual stress is formed in barrel inner wall for shape, these residual stress can make barrel bear higher internal pressure,
Improve the intensity of barrel.
Current self-tightening technique include barrel internal hydraulic pressure self-tightening, barrel internal mechanical self-tightening and barrel internal explosion from
Tightly.These three techniques are based on the principle that interior thorax when manufacture applies high pressure.These three techniques are based on interior thorax when manufacture and apply height
The principle of pressure, method is single, can not be from external observation, and the installation of detection device is very difficult.
Invention content
The object of the present invention is to provide a kind of outside firearms barrel carries out the device and tightening method of movable hydraulic self-tightening,
The technological approaches for realizing barrel self-tightening is expanded.
The present invention adopts the following technical scheme that：
A kind of firearms barrel outside movable hydraulic Self tightening device comprising tank body；The tank body includes the upper shell being hinged
And lower housing, the free end of the upper shell is provided with the first connecting plate, U-type groove is provided on first connecting plate, described
The free end of lower housing is provided with the second connecting plate corresponding with the first connecting plate, be hinged on second connecting plate with it is U-shaped
The fastening bolt of slot cooperation.
The both ends of the upper shell are both provided with upper half ring, and the lower housing is provided with lower semi-ring corresponding with upper half ring,
The corresponding upper half ring and lower semi-ring are combined to form sealing ring, and it is close that the inner wall of the upper half ring and lower semi-ring is both provided with first
Sealing.
Inlet is provided on the upper shell, the inlet is connected to hydraulic pump, the inlet tube by input duct
Pressure-control valve is provided on road.
Further, further include wet tank；Liquid outlet is provided on the lower housing, the wet tank is by returning
Liquid pipe road is connected to liquid outlet；Wet tank is connected to by connecting pipe with hydraulic pump；It is provided with pressure release on the back liquid pipeline
Valve.
Further, it is provided with end ring on the outside of the sealing ring, the end ring includes upper half end ring and lower half end ring, described
The inner wall of upper half end ring and lower half end ring is both provided with the second sealant, and outer wall is both provided with external screw thread, the end of the sealing ring
Portion is provided with the internal thread coordinated with the external screw thread.
Further, the pressure gauge for measuring tank interior pressure is provided with outside the upper shell.
A method of outer self-tightening being carried out to firearms barrel using above-mentioned apparatus, is included the following steps：
A firearms barrel blank self-tightening region axially) is divided into several sections, it is identical as length of tank per segment length, often
Lap is 0.5~1cm between section；The mark of each self-tightening section is made in firearms barrel blank outer surface, each section of self-tightening sequence is
High pressure section after first low pressure stage；
B) firearms barrel blank is placed in tank body with self-tightening section mark in sequence, is sealed；
C) hydraulic pump is passed through self-tightening liquid by inlet by input duct into tank body, and pressure-control valve controls in tank
Pressure is 200~800MPa, 20~40min of pressurize；
D self-tightening liquid pressure release) is discharged after pressurize；
E tank body) is moved to next self-tightening section, repeats step B)~D), until completing to entire firearms barrel blank
The self-tightening in self-tightening region.
In method, the step C) in, the self-tightening liquid includes the component of following parts by weight：0.5~1.5 part of water,
1.5~3 parts of ethylene glycol, 0.5~1.5 part of kerosene and 0.3~1 part of transformer oil.
In method, the step C) in, the self-tightening liquid includes the component of following parts by weight：1 part of water, 2 parts of second
Glycol, 1 part of kerosene and 0.5 part of transformer oil.
In method, the step C) in, the pressure inside the tank is calculated by formula (a)：
In formula (a), p- self-tightening pressure；r1Barrel blank inside radius；r2Barrel blank outer radius；σsBarrel material is bent
Take strength degree；ρ-barrel barrel blank self-tightening radius.
In method, the step C) in, dwell time 30min.
The principle of the present invention is：Applying liquid high pressure paragraph by paragraph outside barrel so that barrel wall part is plastically deformed,
After removing high pressure, residual stress is generated in barrel inner wall plastic zone, higher internal pressure is born when to enable barrel to shoot,
Improve barrel intensity.Piecewise self-tightening is that barrel different cross section can be made to use different autofrettage pressures, it is ensured that each section of barrel
Face self-tightening degree is almost the same.
The beneficial effects of the present invention are：The present invention has expanded the technological approaches for realizing firearms barrel self-tightening, barrel self-tightening
Can not only it use internal hydraulic pressure self-tightening technique that can also use external hydraulic self-tightening technique.It can make barrel by piecewise self-tightening
Each section reaches almost the same self-tightening degree under different autofrettage pressures.The present invention can be used for universities and colleges, scientific research institution and weapon
The firearms barrel self-tightening of factory manufactures.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of tank body upper shell.
Fig. 3 is the structural schematic diagram of end ring.
Wherein, 1 upper shell, 2 lower housings, 3 first connecting plates, 4U type grooves, 5 second connecting plates, 6 fastening bolts, 7 upper half
Ring, 8 times semi-rings, 9 first sealants, 10 inlets, 11 input ducts, 12 hydraulic pumps, 13 pressure-control valves, 14 wet tanks,
15 liquid outlets, 16 back liquid pipelines, 17 relief valves, 18 upper half end ring, 19 lower half end ring, 20 second sealants, 21 firearms barrel hairs
Base, 22 pressure gauges, 23 third sealants, 24 connecting pipes.
Specific implementation mode
Embodiment 1
In conjunction with shown in Fig. 1~3, a kind of firearms barrel outside movable hydraulic Self tightening device comprising tank body；The tank body packet
The upper shell 1 and lower housing 2 of hinge are included, the free end of the upper shell 1 is provided with the first connecting plate 3, first connecting plate
U-type groove 4 is provided on 3, the free end of the lower housing 2 is provided with second connecting plate 5 corresponding with the first connecting plate 3, described
The fastening bolt 6 coordinated with U-type groove 4 is hinged on second connecting plate 5.The second connecting plate inner wall is provided with third sealant
23。
Upper shell and lower housing pairing, are fixed by the first connecting plate and the second connecting plate, form tank body.Upper shell is under
The hinge portion of shell is sealed by gasket, and free end is sealed by the first connecting plate and the second connecting plate pairing, fastening bolt
It can be embedded in the U-type groove of cooperation, third sealant is compressed after tightening, realize fixed and sealing.
The both ends of the upper shell 1 are both provided with upper half ring 7, and the lower housing 2 is provided with lower half corresponding with upper half ring 7
Ring 8, the corresponding upper half ring 7 and lower semi-ring 8 are combined to form sealing ring, and the inner wall of the upper half ring 7 and lower semi-ring 8 is all provided with
It is equipped with the first sealant 9.After upper shell and lower housing pairing fasten, it is arranged in the corresponding upper half ring in tank body both ends and lower half
Ring is combined to form sealing ring therewith, and sealing ring is sealed for fixing firearms barrel blank 21 and being realized by the first sealant.
Inlet 10 is provided on the upper shell 1, the inlet 10 is connected to hydraulic pump 12, institute by input duct 11
It states and is provided with pressure-control valve 13 in input duct 11.Self-tightening liquid squeezes into tank body by input duct and inlet by hydraulic pump
Interior, pressure-control valve controls amount of liquid, and then adjusts the pressure in tank body.
It further includes wet tank 14；Liquid outlet 15 is provided on the lower housing 2, the wet tank 14 is by returning
Liquid pipe road 16 is connected to liquid outlet 15；Wet tank 14 is connected to by connecting pipe 24 with hydraulic pump 12；The back liquid pipeline 16
On be provided with relief valve 17.Liquid outlet realizes pressure release for self-tightening liquid to be discharged.Self-tightening liquid is recycled to by back liquid pipeline
In wet tank, wet tank is connected to hydraulic pump simultaneously, realizes recycling for self-tightening liquid.Relief valve can be controlled with pressure
Valve coordinates, and is adjusted to the pressure in tank body.
It is provided with end ring on the outside of the sealing ring, the end ring includes upper half end ring 18 and lower half end ring 19, the upper half
The inner wall of end ring 18 and lower half end ring 19 is both provided with the second sealant 20, and outer wall is both provided with external screw thread, the sealing ring
End set has the internal thread coordinated with the external screw thread.Upper half end ring and lower half end ring surround firearms barrel to being combined
Outer wall, the outer wall of end ring lid are provided with the screw thread coordinated with sealing ring both ends, and the second sealant provides sealing after screwing, and increase
Sealing effect during use.The gasket, the first sealant, the second sealant and third sealant be rubber layer,
Silicon carbide layer, the gasket 45 or 35CrMoAl spherical surface steel pads to harden.
The pressure gauge 22 for measuring tank interior pressure is provided with outside the upper shell 1.For detecting pressure inside the tank shape
Condition.
Embodiment 2
A method of outer self-tightening being carried out to firearms barrel using 1 described device of embodiment, is included the following steps：
A the self-tightening region of firearms barrel blank 21 axially) is divided into several sections, every segment length and length of tank phase
Together, lap is 0.5~1cm between every section；The mark of each self-tightening section is made in firearms barrel blank outer surface, each section of self-tightening is suitable
Sequence is high pressure section after first low pressure stage.Lap between every section is preferably 1cm.
B) firearms barrel blank is placed in tank body with self-tightening section mark in sequence, is sealed；
C) hydraulic pump is passed through self-tightening liquid by inlet by input duct into tank body, and pressure-control valve controls in tank
Pressure is 200~800MPa, 20~40min of pressurize, preferably 30min.
The self-tightening liquid includes the component of following parts by weight：0.5~1.5 part of water, 1.5~3 parts of ethylene glycol, 0.5
~1.5 parts of kerosene and 0.3~1 part of transformer oil.
Preferably, the self-tightening liquid includes the component of following parts by weight：1 part of water, 2 parts of ethylene glycol, 1 part of coal
Oil and 0.5 part of transformer oil.
The pressure inside the tank is calculated by formula (a)：
In formula (a), p- self-tightening pressure；r1Barrel blank inside radius；r2Barrel blank outer radius；σsBarrel material is bent
Take strength degree；ρ-barrel barrel blank self-tightening radius.
D self-tightening liquid pressure release) is discharged after pressurize；
E fastening bolt) is opened, tank body is moved to next self-tightening section, repeats step B)~D), until completing to entire
The self-tightening in firearms barrel blank self-tightening region.After the completion of self-tightening, end excision, inner and outer wall essence are also carried out to barrel blank
It processes (smart car, fine grinding, polishing etc.), to meet size and required precision.
Embodiment described above is only that the preferred embodiment of the present invention is described, and but it is not limited to this, this
The technical staff in field is easy to understand the spirit of the present invention according to above-described embodiment, and makes different amplification and variation, but
Without departing from the spirit of the present invention, all within protection scope of the present invention.
Claims (7)
1. movable hydraulic Self tightening device outside a kind of firearms barrel, which is characterized in that it includes tank body；The tank body includes being hinged
Upper shell (1) and lower housing (2), the free end of the upper shell (1) be provided with the first connecting plate (3), first connection
U-type groove (4) is provided on plate (3), the free end of the lower housing (2) is provided with corresponding with the first connecting plate (3) second and connects
Fishplate bar (5) is hinged with the fastening bolt (6) with U-type groove (4) cooperation on second connecting plate (5)；
The both ends of the upper shell (1) are both provided with upper half ring (7), and the lower housing (2) is provided with corresponding with upper half ring (7)
Lower semi-ring (8), the corresponding upper half ring (7) and lower semi-ring (8) are combined to form sealing ring, the upper half ring (7) and lower semi-ring
(8) inner wall is both provided with the first sealant (9)；
Inlet (10) is provided on the upper shell (1), the inlet (10) is connected to hydraulic pump by input duct (11)
(12), it is provided with pressure-control valve (13) on the input duct (11)；
It further includes wet tank (14)；Liquid outlet (15) is provided on the lower housing (2), the wet tank (14) passes through
Back liquid pipeline (16) is connected to liquid outlet (15)；Wet tank (14) is connected to by connecting pipe (24) with hydraulic pump (12)；Institute
It states and is provided with relief valve (17) on back liquid pipeline (16)；
It is provided with end ring on the outside of the sealing ring, the end ring includes upper half end ring (18) and lower half end ring (19), the upper half
The inner wall of end ring (18) and lower half end ring (19) is both provided with the second sealant (20), and outer wall is both provided with external screw thread, described close
The end set of seal ring has the internal thread coordinated with the external screw thread.
2. movable hydraulic Self tightening device outside a kind of firearms barrel according to claim 1, which is characterized in that the upper casing
The pressure gauge (22) for measuring tank interior pressure is provided with outside body (1).
3. a method of outer self-tightening being carried out to firearms barrel using 2 described device of claims 1 or 2, which is characterized in that including
Following steps：
A firearms barrel blank self-tightening region axially) is divided into several sections, per segment length it is identical as length of tank, every section it
Between lap be 0.5~1cm；The mark of each self-tightening section is made in firearms barrel blank outer surface, each section of self-tightening sequence is first low
High pressure section after pressure section；
B) firearms barrel blank is placed in tank body with self-tightening section mark in sequence, is sealed；
C) hydraulic pump is passed through self-tightening liquid by inlet by input duct into tank body, and pressure-control valve controls pressure inside the tank
For 200~800MPa, 20~40min of pressurize；
D self-tightening liquid pressure release) is discharged after pressurize；
E tank body) is moved to next self-tightening section, repeats step B)~D), until completing to entire firearms barrel blank self-tightening
The self-tightening in region.
4. according to the method described in claim 3, the it is characterized in that, step C) in, the self-tightening liquid includes following weight
Measure the component of part：0.5~1.5 part of water, 1.5~3 parts of ethylene glycol, 0.5~1.5 part of kerosene and 0.3~1 part of transformer
Oil.
5. according to the method described in claim 4, the it is characterized in that, step C) in, the self-tightening liquid includes following weight
Measure the component of part：1 part of water, 2 parts of ethylene glycol, 1 part of kerosene and 0.5 part of transformer oil.
6. according to the method described in claim 3, the it is characterized in that, step C) in, the pressure inside the tank passes through formula (a)
It is calculated：
In formula (a), p- self-tightening pressure；r1Barrel blank inside radius；r2Barrel blank outer radius；σsBarrel material yield is strong
Spend the limit；ρ-barrel blank self-tightening radius.
7. according to the method described in claim 3, the it is characterized in that, step C) in, dwell time 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710626763.0A CN107289814B (en) | 2017-07-19 | 2017-07-19 | Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710626763.0A CN107289814B (en) | 2017-07-19 | 2017-07-19 | Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107289814A CN107289814A (en) | 2017-10-24 |
| CN107289814B true CN107289814B (en) | 2018-09-21 |
Family
ID=60103551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710626763.0A Expired - Fee Related CN107289814B (en) | 2017-07-19 | 2017-07-19 | Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107289814B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58107226A (en) * | 1981-12-21 | 1983-06-25 | Sumitomo Metal Ind Ltd | Manufacture of high collapse strength steel tube |
| CN2449836Y (en) * | 2000-10-10 | 2001-09-26 | 华东理工大学 | Device for mfg. lining composite tube by hydraulic expansion |
| CN1651163A (en) * | 2005-02-04 | 2005-08-10 | 华东理工大学 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
| CN102581059B (en) * | 2012-02-14 | 2014-02-26 | 江苏三汇联发管业有限公司 | Hydrostatic pressure expanding composite technology for bimetal composite pipe |
| CN207180468U (en) * | 2017-07-19 | 2018-04-03 | 中国人民解放军军械工程学院 | Movable hydraulic Self tightening device outside a kind of firearms barrel |
-
2017
- 2017-07-19 CN CN201710626763.0A patent/CN107289814B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN107289814A (en) | 2017-10-24 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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