CN102756430B - Explosive cutting device for brittle material - Google Patents
Explosive cutting device for brittle material Download PDFInfo
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- CN102756430B CN102756430B CN201110108706.6A CN201110108706A CN102756430B CN 102756430 B CN102756430 B CN 102756430B CN 201110108706 A CN201110108706 A CN 201110108706A CN 102756430 B CN102756430 B CN 102756430B
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- explosive
- cutting
- brittle material
- fragile material
- triangle wire
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Abstract
The invention discloses an explosive cutting device for a brittle material. The device is used for cutting the material by the aid of a detonation driving principle and the characteristics of high notch sensitivity and low impact strength of the brittle material. Firstly, a triangular wire is driven to move at a high speed by means of explosive detonation, the tip of the triangular wire collides with the surface of the brittle material and forms a notch, and secondly, the notch is impacted by detonation waves, so that the brittle material is cracked and slabbed along the notch until breaking. The device can be made into a small-sized cutting cord for curve cutting, and can also be made into a large-sized linear cutter for linear cutting. An energy concentration liner is omitted, and the device is high in cutting capacity, low in manufacturing cost and capable of rapidly cutting the brittle material.
Description
Technical field
The invention belongs to a kind of explosive processing device, particularly a kind of blast cutter sweep for fly-cutting fragile material.
Background technology
Fragile material refers under external force and only to produce the material that very little distortion destroys fracture, thinks correspondingly with plastic material, and generally just percentage elongation is greater than 5% material and is called plastic material, and percentage elongation is less than 5% material and is called fragile material.Fragile material is of a great variety, accounts for the over half of current material, as glass, lucite, high silica phenolic resins, carbide alloy, graphite, pottery, rock, concrete, cast iron ..., be all fragile material.Compare with plastic material, fragile material has following features: 1) resistance to compression tension not, the tensile strength of fragile material is much smaller than compression strength.2) not shock resistance of anti-static load, the impact strength of fragile material is much smaller than quasistatic intensity.3) stress is concentrated sensitivity, although so material is all used stress concentration effect, fragile material counter stress is concentrated more responsive, has high notch sensitivity.4) hardness is high, and fragile material generally all has higher hardness.
Because the hardness of fragile material is high, be difficult to it to carry out cutting processing, the cutting technique of fragile material mainly contains at present: water jet cutting, diamond blade cutting, laser cutting, plasma cutting.Although these cutting techniques have higher cutting accuracy, cutting speed is slow, and efficiency is low, and all needs special equipment, complicated operation, and cutting cost is high.
Adopt Explosive Cutting Technique can realize the fly-cutting of fragile material.What existing Explosive Cutting Technique adopted is all cumulative principle, is being with the outside filling of reeded metal liner explosive, and the cavity liner that crushes after explosive detonation, makes energy accumulating form high speed metal jet, finally utilizes metal jet cutting.As patent of invention ZL200710012257(plane-cabin energy-collected cutting apparatus) what adopt is the lead-antimony alloy cavity liner with 80 ° of subtended angles, what utility model ZL95242267(jet cutter) adopt is annular metal liner, what utility model ZL200820221979(explosive cutting valve) adopt is also annular metal liner, and utility model ZL200820109132(breaks wall flexible linear shaped charge) what adopt is taper, hemispherical, tubaeform metal liner.With the blast cutter sweep of cumulative cavity liner, the intensity of its metal jet is extremely low, can be approximated to be fluid above, is only suitable for cutting plastic material, but for the higher fragile material of hardness, the breach that metal jet forms is shallow, and cutting power is poor.Shaped charge material is generally fine copper or metal in addition, complex structure, and material cost and processing cost are high.
Summary of the invention
The object of the present invention is to provide a kind of fragile material to be had to stronger cutting power, and can carry out the blast cutter sweep of fly-cutting.
The technical solution that realizes the object of the invention is: a kind of blast cutter sweep for fragile material, comprise explosive, steel triangle wire, plastic channel and rubber groove, steel triangle wire pointed end is arranged in plastic channel, explosive is laid in the upper surface of steel triangle wire, explosive height with in plastic channel along concordant; Open Side Down for rubber groove, and the outer wall of its inwall and plastic channel is bonding with glue, by explosive and the sealing of steel triangle wire.
The present invention compared with prior art, its remarkable advantage: (1) has replaced cumulative cavity liner with steel triangle wire, the in the situation that of identical explosive charge, steel triangle wire can form darker breach, therefore can cut thicker fragile material open, make this blast cutter sweep there is stronger cutting power.(2) with steel triangle wire, replace the cumulative cavity liner of fine copper or metal, reduced material cost and processing cost.(3) explosive cross sectional shape is rectangle, does not need cumulative groove, has reduced difficulty of processing and the processing cost of explosive mould.
Accompanying drawing explanation
Accompanying drawing is the sectional view of a kind of blast cutter sweep for fragile material of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
By reference to the accompanying drawings, the present invention is a kind of blast cutter sweep for fly-cutting fragile material, explosive 1, steel triangle wire 2, plastic channel 3 and rubber groove 4, consists of.Steel triangle wire 2 pointed end are arranged in plastic channel 3, and explosive 1 is laid in the upper surface of steel triangle wire 2, explosive 1 height with in plastic channel 3 along concordant.Open Side Down for rubber groove 4, and the outer wall of its inwall and plastic channel 3 is bonding with glue, by explosive 1 and 2 sealings of steel triangle wire.
During use, by rubber groove 4, Open Side Down sticks on brittle material surface, the explosive 1 rear drive steel triangle wire 2 that detonates moves downward, steel triangle wire 2 is cut the plastic channel 3 of very thin thickness open, high-speed impact fragile material also forms breach on its surface, then detonation wave impacts on breach, and fragile material cracks expansion and slabbing, finally ruptures.
Explosive is the solid explosive with higher explosion velocity, as flexible explosive, plastic explosive or cemented explosive.Steel triangle wire requires to have higher hardness, can be stainless steel or ordinary carbon steel.It is medium hardness easily extrusion molding processing that plastic channel requires, and can be polyvinyl chloride, polyethylene or MPS, and rubber groove requires to have medium hardness and good shock resistance, can be isoprene rubber or fluorubber.
The present invention has utilized the high notch sensitivity of detonation driven principle and fragile material, the feature of low impact strength to cut.First explosive detonation drives the flight of steel triangle wire, the most advanced and sophisticated high-speed impact fragile material of steel triangle wire, and form in its surface darker breach, because fragile material has high notch sensitivity, so the darker fragile material of breach more easily ruptures.Detonation wave is with high speed and compression shock breach subsequently, because the impact strength of fragile material is very low, therefore can form crackle expansion rapidly along breach, shock wave forms slabbing after the free-surface reflection of fragile material simultaneously, final fragile material, under the double action of notch sensitivity and shock loading, ruptures with the form of Crack Extension and slabbing.Explosive and steel triangle wire are arranged in plastic channel, and wrap up with rubber groove outside, and the height that can change rubber groove is adjusted the height of burst (the most advanced and sophisticated distance to brittle material surface of steel triangle wire), thereby adjust the stroke speed of steel triangle wire.In addition, all right impact-absorbing ripple of rubber groove, can play the effect of protection, reduces the destruction of detonation to surrounding environment.This blast cutter sweep can be made undersized flexible linear shaped charge and carry out curvilinear cut, also can make large-sized linear cutter and carry out straight cuts.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
By accompanying drawing, arrange the blast cutting of carrying out poly (methyl methacrylate) plate.The length of poly (methyl methacrylate) plate is 400mm, and width is 200mm, and thickness is 20mm.Explosive is for take the flexible explosive that HMX is main component, and density is 1.5g/cm
3, explosion velocity is 7000m/s, the cross-sectional width of explosive is 2mm, is highly 2mm.Steel triangle wire material is 304 stainless steels, bottom side length 2mm, and high 1.5mm, the height of burst is 2mm.Polyvinyl chloride plastic trough sidewalls is thick is 0.5mm, and isoprene rubber cell wall is thick is 10mm.After explosive initiation, steel triangle wire cuts into two along its length by poly (methyl methacrylate) plate, and otch is neat, cuts the 1ms of being less than consuming time.
Embodiment 2
By accompanying drawing, arrange the blast cutting of carrying out marble slab.The length of marble slab is 400mm, and width is 200mm, and thickness is 30mm.Explosive is used take the plastic explosive that hexogen is main component, and density is 1.65g/cm
3, explosion velocity is 8000m/s, the cross-sectional width of explosive is 3mm, is highly 3mm.Steel triangle wire material is 201 stainless steels, bottom side length 3mm, and high 2mm, the height of burst is 2mm.Vinyon cell wall is thick is 0.5mm, and fluorubber cell wall is thick is 10mm.After explosive initiation, steel triangle wire cuts into two along its length by marble slab, and otch is neat, cuts the 1ms of being less than consuming time.
Embodiment 3
By accompanying drawing, arrange the blast cutting of carrying out cast iron plate.The length of cast iron plate is 1500mm, and width is 500mm, and thickness is 300mm.Explosive is used take the cemented explosive that hexogen is main component, and density is 1.65g/cm
3, explosion velocity is 8300m/s, the cross-sectional width of explosive is 20mm, is highly 20mm.Steel triangle wire material is No. 45 carbon steel, bottom side length 20mm, and high 20mm, the height of burst is 4mm.Modified polystyrene plastic cell wall is thick is 2mm, and isoprene rubber cell wall is thick is 30mm.After explosive initiation, steel triangle wire cuts into two along its length by cast iron plate, and otch is neat, cuts the 1ms of being less than consuming time.
Embodiment 4
By accompanying drawing, arrange the blast cutting of carrying out concrete slab.The length of concrete slab is 600mm, and width is 300mm, and thickness is 200mm.Explosive is used take the flexible explosive that HMX is main component, and density is 1.65g/cm
3, explosion velocity is 7500m/s, the cross-sectional width of explosive is 20mm, is highly 20mm.Steel triangle wire material is 310 stainless steels, bottom side length 20mm, and high 20mm, the height of burst is 5mm.Polyvinyl chloride plastic trough sidewalls is thick is 1mm, and fluorubber cell wall is thick is 20mm.After explosive initiation, steel triangle wire cuts into two along its length by concrete slab, and otch is neat, cuts the 1ms of being less than consuming time.
Other fragile materials also can be realized fly-cutting according to the method described above.
Claims (4)
1. the blast cutter sweep for fragile material, it is characterized in that: comprise explosive (1), steel triangle wire (2), plastic channel (3) and rubber groove (4), steel triangle wire (2) pointed end is arranged in plastic channel (3), explosive (1) is laid in the upper surface of steel triangle wire (2), and explosive (1) height is upper along concordant with plastic channel (3); Open Side Down for rubber groove (4), and the outer wall of its inwall and plastic channel (3) is bonding with glue, by explosive (1) and steel triangle wire (2) sealing.
2. a kind of blast cutter sweep for fragile material according to claim 1, is characterized in that: steel triangle wire (2) is stainless steel or ordinary carbon steel.
3. a kind of blast cutter sweep for fragile material according to claim 1, is characterized in that: plastic channel (3) is polyvinyl chloride, polyethylene or MPS.
4. a kind of blast cutter sweep for fragile material according to claim 1, is characterized in that: rubber groove (4) is isoprene rubber or fluorubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110108706.6A CN102756430B (en) | 2011-04-28 | 2011-04-28 | Explosive cutting device for brittle material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110108706.6A CN102756430B (en) | 2011-04-28 | 2011-04-28 | Explosive cutting device for brittle material |
Publications (2)
| Publication Number | Publication Date |
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| CN102756430A CN102756430A (en) | 2012-10-31 |
| CN102756430B true CN102756430B (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110108706.6A Expired - Fee Related CN102756430B (en) | 2011-04-28 | 2011-04-28 | Explosive cutting device for brittle material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111923397B (en) * | 2020-08-07 | 2022-02-01 | 重庆工程职业技术学院 | Printing module and device for printing and processing cutting cable through 3D |
| CN112238177A (en) * | 2020-10-16 | 2021-01-19 | 安徽理工大学 | Energy-gathered cutting device with variable explosion height |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1275721A (en) * | 1961-06-08 | 1972-05-24 | Mine Safety Appliances Co | Signal flare and mine-anchor line cutter utilizing the same |
| US5936184A (en) * | 1997-11-21 | 1999-08-10 | Tracor Aerospace, Inc. | Devices and methods for clearance of mines or ordnance |
| US7278353B2 (en) * | 2003-05-27 | 2007-10-09 | Surface Treatment Technologies, Inc. | Reactive shaped charges and thermal spray methods of making same |
| CN101234428B (en) * | 2008-03-06 | 2011-07-27 | 张路青 | Flat plate exploder capable of improving velocity of flyer |
| US20100043661A1 (en) * | 2008-08-25 | 2010-02-25 | Ensign-Bickford Aerospace & Defense Company | Explosive cutting charge |
| CN101520291A (en) * | 2009-03-23 | 2009-09-02 | 赵东平 | Underwater explosive perforation bullet |
| CN201769289U (en) * | 2010-08-05 | 2011-03-23 | 南通通立电机磁瓦有限公司 | Magnetic tile cutter |
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| CN102756430A (en) | 2012-10-31 |
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Granted publication date: 20141112 Termination date: 20160428 |