784 results about "TEX-explosive" patented technology

The invention belongs to the technical field of underground blasting, and discloses a blasting parameter screening method and system in one-time well completion blasting of a blind raise. The method comprises the steps that a slotting mode is determined, and then the slotting mode, the number of empty holes, the hole distance between the empty holes and charging holes and the filling length parameters are determined; explosive load calculation, wherein reasonable explosive loads and non-coupling coefficients of the slotting holes and the peripheral holes are determined according to numerical simulation calculation and blasting funnel test results; delay time is determined, the optimal influence time of inter-hole delay on the explosion stress wave superposition effect is calculated in a numerical simulation mode, and the damage effect of stress waves on rocks is optimal; and filling and charging are conducted, due to the fact that upward non-coupling charging is adopted, a reasonable charging mode is determined to ensure the accuracy of the charging amount and the explosive position, and reasonable filling is set to ensure that the explosive energy fully acts on the exploded rock mass. The safety of well completion operation can be greatly improved; the maximum utilization of resources is realized, and the economic benefit is improved.

The invention provides a tunnel blasting scheme determining method and device, and relates to the technical field of tunnel engineering data processing.The method compensates stress wave attenuation caused by large-aperture blast hole air gaps through radial explosive density gradient design, so that the energy utilization rate is higher; the axial charge density is dynamically adjusted on the basis of a three-dimensional clamping coefficient, the problem that energy of a hole bottom high constraint area is insufficient is solved, the explosive density and the hole net topology are collaboratively optimized, the contour forming quality is greatly improved, back break is reduced, and therefore the cost is reduced, and the time is shortened. Due to the fact that explosive and hole net parameters are optimized, energy distribution is more reasonable, blasting disturbance is reduced, stability of surrounding rock is enhanced, safety in a hole is greatly improved, and casualties are reduced.

The invention discloses a simulation method for evaluating damage of a concrete gravity dam under the action of an explosion load. The simulation method comprises the following steps: establishing geometric models of the concrete gravity dam, water and explosives, performing grid division on the geometric models, and dispersing units into particles to obtain a discretization model; giving material parameters, boundary conditions and contact to the discretization model, and setting a detonation point position and a detonation mode; coupling effects between the explosive and water, between the water and the concrete gravity dam and between the explosive and the concrete gravity dam are set; key information is initialized; a fluid-structure interaction force is calculated by adopting an asynchronous solution IHPD-SPH coupling method; an SPH solver is adopted to update the speed and density information of the fluid; an IHPD solver is adopted to update internal force and acceleration information of the solid; checking whether the calculation duration is met or not, and if yes, ending calculation; if not, recalculating the fluid-solid coupling force according to the currently obtained particle state; and obtaining a dam damage result, and performing damage grade evaluation.

The utility model discloses an automatic explosive scraping and floating explosive removing device for a perforating bullet, which belongs to the technical field of mechanical automation, and comprises an explosion-proof box body, a positioning rotating mechanism, a scraper, a floating explosive removing mechanism, a lifting mechanism and the like, the scraper is installed at the tail end of the floating powder removing mechanism and moves along with the floating powder removing mechanism, the floating powder removing mechanism is composed of a suction nozzle and a negative pressure pipeline, the floating powder removing mechanism is installed on the lifting mechanism, and the lifting mechanism is installed on the transverse moving mechanism. Compared with an existing manual explosive scraping and floating explosive removing mode, the mechanism can adjust the positions of the suction nozzle and the scraper by controlling the lifting mechanism and the transverse moving mechanism, after the scraper is adjusted to the top of a positioning perforating bullet shell, the positioning rotating mechanism is controlled to rotate, the scraper can hang explosives accumulated on the upper portion of the perforating bullet shell to be flat, and the explosive removing efficiency is improved. The suction nozzle can remove the hung floating powder, and automatic work is achieved.

The invention discloses a double-row medium-length hole blasting method for a filling stope. According to the method, a theoretical value range of each blasting parameter is deduced according to field engineering practice, an ore rock blasting crushing mechanism and a blasting parameter theoretical formula. The method comprises the following steps of: constructing a stope blasting model with different hole bottom distances, explosive unit consumption and resistance line combinations by using ANSYS numerical simulation software in combination with physical and mechanical properties of ore rocks and field explosive performance parameters, and preferably selecting double-row medium-length hole blasting parameters according to a chamber effective stress distribution rule and a roof area vibration velocity peak value of the ANSYS blasting model. According to the method, by selecting the double-row optimal medium-length hole blasting parameters, it is guaranteed that ore rocks in the chamber are fully crushed, the effective stress invading the roof and the blasting vibration velocity peak value are reduced, and the roof is prevented from being damaged. And meanwhile, the explosive loading amount is reduced, the economic cost is reduced, and the production efficiency of a mine is improved.

The invention discloses a preparation method of a CoCrNi medium-entropy alloy and Q235B steel explosive welding composite board, which comprises the following steps of: annealing a CoCrNi medium-entropy alloy board, sequentially laying sandy soil, an anvil, a Q235B hot-rolled steel plate, a support column, a medium-entropy alloy board, kraft paper and explosive from bottom to top on an explosion field, and performing explosive welding to obtain the CoCrNi medium-entropy alloy and Q235B steel explosive welding composite board. The detonation velocity of the explosive ranges from 2500 m / s to 3000 m / s, and the brisance of the explosive ranges from 18 mm to 22 mm. According to the method, metallurgical bonding of the CoCrNi medium entropy alloy and the Q235B steel plate is achieved, the interface bonding rate of the obtained composite plate is larger than 99.2%, the yield strength is larger than 420 MPa, the tensile strength is larger than 500 MPa, the percentage elongation after fracture is larger than 35%, and the interface shear strength is larger than 200 MPa. The method is simple in process and suitable for industrial production.

The invention discloses a drilling, deslagging, charging and blocking integrated device, which belongs to the technical field of tunnel engineering and open-air engineering blasting equipment, and comprises a mobile vehicle body, a multi-link structure, a drilling and deslagging device, an explosive filling device and a stemming blocking device. The drilling and deslagging device is used for drilling and discharging drilling cuttings; and the explosive filling device independent track is arranged above the drilling machine beam track in parallel and is used for accurately conveying detonators and emulsion explosives into holes. After drilling is completed, the explosive filling device moves downwards in parallel to be aligned with the hole site for charging; after charging, the device moves upwards to drive the stemming plugging device to reach an orifice, and drilling cuttings discharged by drilling are directly used as stemming raw materials for automatic compaction and plugging. The problems that in the traditional blasting construction process, equipment is frequently switched, the manual operation efficiency is low, high-risk link manual operation needs to be conducted, and stemming raw materials need to be prepared independently are solved, automatic continuous operation of the whole process of drilling, charging and plugging is achieved, and the construction efficiency and intrinsic safety are remarkably improved.

The invention relates to the technical field of blasting construction, and particularly discloses a tunnel back break intelligent control method which comprises the following steps: S1, scanning a tunnel face to be blasted to generate high-precision point cloud data; s2, constructing a tunnel face BIM model according to the high-precision point cloud data, and performing space coordinate registration; judging whether blasting is carried out for the first time or not, and if blasting is not carried out for the first time, displaying a blast hole of last blasting on the tunnel face BIM model; s3, receiving input of blast hole space coordinate data of the blasting, and creating blast holes of the blasting on the tunnel face BIM model according to blast hole space coordinates; s4, installing an intelligent laser projector in the tunnel; s5, a reference control point is arranged on the arch crown of the tunnel, projection parameters are calculated, and blast holes of the blasting on the tunnel face BIM model are projected to the actual tunnel face; and S6, drilling is conducted according to the projection, explosives are installed, and blasting is conducted. By the adoption of the technical scheme, the blast hole layout change can be accurately positioned, and the blasting precision is improved.

The invention provides an explosive unit consumption determination method based on drilling machine working parameters and optimal mining comprehensive energy consumption, and relates to the technical field of energy conservation and consumption reduction of surface mines. The method comprises the steps that a single blast hole is drilled in a to-be-exploded area, and while-drilling parameters of a drilling machine are obtained; according to the while-drilling parameters, evaluating ore mechanical parameters and ore body structure parameters of the to-be-exploded ore body; according to the ore mechanical parameters and the ore body structure parameters, a relation model of the mining and selection comprehensive energy consumption of the to-be-exploded ore body and the average blasting lumpiness is established; and determining the average blasting lumpiness when the energy consumption is the lowest, and calculating the required explosive unit consumption. According to the method, the unit consumption of the explosive with the lowest mining and selection comprehensive energy consumption can be rapidly determined only through the drilling procedure for different explosion areas in the initial procedure of open-pit mining, effective guidance is provided for the explosion design of the open-pit mine, and the method has great significance in promoting energy conservation and consumption reduction of the open-pit mine.

The invention discloses an explosion venting test system and method for simulating accidental explosion of an industrial factory building structure, and belongs to the technical field of explosion test systems. The problems that the structure configuration of an existing explosion venting test platform is difficult to adjust, the arrangement flexibility of explosion venting measures is low, and the universality of the test platform is poor are solved. A T-shaped groove rigid platform of the foundation system is installed on a box type foundation, a plurality of structural columns of the assembly type structural system are connected with the T-shaped groove rigid platform in a matched mode, every two adjacent structural columns are connected through an inter-column connecting beam, and an assembly type wall body and a closed wall body are connected with the structural columns in a matched mode. An explosion space is defined by the assembly type wall bodies and the closed wall bodies, high-energy explosives of the explosion source control subsystems are arranged in the explosion space, the roof panels are installed on the assembly type wall bodies and the closed wall bodies, and explosion venting parts are machined on the assembly type wall bodies and the roof panels. According to the explosion venting test system, the structure size can be freely changed according to needs, and the convenience and universality of the explosion venting test are improved.

The invention relates to an efficient shaped charge blasting charging device for tunnel smooth blasting, and belongs to the field of tunnel shaped charge smooth blasting. The device comprises an energy gathering pipe I and an energy gathering pipe II, the two ends of the energy gathering pipe I are an end A and an end B, the two ends of the energy gathering pipe II are an end A'and an end B ', the end A of the energy gathering pipe I is close to a blast hole opening, the end B of the energy gathering pipe I is fixedly connected with the end A' of the energy gathering pipe II through a positioning plate, and the end B 'of the energy gathering pipe II is fixedly connected with the end A' of the adjacent energy gathering pipe II through a positioning plate. A filling fixing bag, a water bag, conventional explosives and energy-gathered explosives are sequentially arranged in the energy-gathered pipe I from the end A to the end B, and conventional explosives and energy-gathered explosives are sequentially arranged in the energy-gathered pipe II from the end A'to the end B '; an industrial electronic detonator is inserted into the energy-gathered explosive of the energy-gathered tube II located at the bottom of the blast hole, and a leg wire of the industrial electronic detonator sequentially penetrates through the centers of the energy-gathered tube II and the energy-gathered tube I from the bottom of the blast hole to an orifice. The charging stability and the forming effect of the tunnel smooth blasting peripheral holes can be improved, the construction cost is reduced, and the construction efficiency is improved.

The invention relates to a process for preparing a gradient hardening metal plate through explosion hardening, and belongs to the technical field of explosion hardening and gradient hardening materials. In order to ensure the experiment safety, a test site is selected as a static explosion site, a rigid base, a metal plate to be subjected to gradient hardening and a poured high-detonation-velocity plate-shaped explosive are sequentially placed in the site from bottom to top, then the explosive is started by an electric detonator to carry out high-pressure and high-frequency impact hardening treatment on the metal plate, and finally the metal plate subjected to gradient hardening is obtained. The surface hardness is improved to 380-400 HV, and the depth of a hardened layer reaches 15 mm. The process is simple to operate, efficient, convenient and obvious in effect, and does not need large equipment and instruments.

The invention relates to the technical field of arc shaped energy-gathered blasting parameter design, and provides an arc shaped energy-gathered blasting parameter design method under a complex crustal stress condition, which comprises the following steps: establishing a double-hole blasting three-dimensional model comprising a rock mass, an arc explosive, an energy-gathered pipe and coupled air, applying a crustal stress boundary condition and carrying out stress initialization; setting material model parameters based on the test data; performing fluid-structure interaction dynamic response numerical simulation on the model by adopting LS-DYNA to obtain stress and strain response caused by blasting; and establishing evaluation indexes based on tensile stress, compressive stress and through crack formation, carrying out sensitivity analysis and optimization adjustment on key blasting parameters such as blast hole spacing, delayed detonation time, explosive loading amount and coupling coefficient, and finally determining an optimal blasting parameter combination in different stress states. The method can effectively meet the blasting operation requirement under the complex ground stress condition, the presplitting quality and the rock mass stability are remarkably improved, and the method has wide engineering application prospects.

The present invention discloses a mobile device for safely unblocking a mine chute in the field of mining machinery technology, comprising: a mobile device, an explosives mounting assembly is provided on the mobile device, the explosives mounting assembly includes a telescopic rod; a winding wheel is provided on the telescopic rod, and the winding wheel is provided with a flexible connecting member for driving the telescopic rod to extend; a rope reel is provided on the explosives mounting assembly for driving the winding wheel to rotate; the rope reel includes a rope reel body, a spline shaft slidingly arranged on the rope reel body, a first drive assembly for driving the spline shaft to slide, and a second drive assembly for driving the spline shaft to rotate; the present invention drives the shift fork to rotate by the driving member, so that the shift fork moves with the spline shaft to the inside of the rope reel body, realizes the retraction of the spline shaft to separate from the winding wheel, and through the above method, the rope reel itself has the function of separating from the external winding wheel, does not rely on external facilities, and reduces the probability of the rope reel and the winding wheel being unable to be separated.

The invention relates to the technical field of blasting, in particular to a method and system for eliminating rockburst through excavation blasting energy, and a finite element numerical calculation model of a tunnel is constructed through simulation modeling. And then determining the influence of the blasting energy to control the aperture of the gun barrel on the blasting process in the model, and further adjusting the aperture ratio in different directions, thereby realizing the accurate control of the blasting energy, further presplitting the deep surrounding rock, and achieving the purpose of eliminating the risk of rock burst. The blasting energy control gun barrel is designed around the explosive, the hole diameter of one side of the tunnel surrounding rock and the hole diameter of one side of the volley face in the tunnel are adjusted, the spreading direction and strength of the blasting energy are accurately controlled, and therefore the purposes of increasing surrounding rock cracks and reducing the rock burst risk are achieved. According to the method, the rockburst risk can be effectively eliminated, the blasting efficiency can be improved, the construction cost is reduced, and remarkable technical advantages and economic benefits are achieved.

The invention discloses a rock blasting load transfer and throwing simulation method which comprises the following steps: S1, acquiring field parameters of a target blasting project, the field parameters comprising rock mass mechanical parameters, explosive parameters, blast hole parameters and charging structure parameters; and S2, based on the field parameters, constructing a three-dimensional explosive-rock calculation model by adopting pretreatment software, dividing grids, importing the grids into finite element software, setting a material model, a state equation and boundary conditions, and simulating an explosive detonation process. The limitation of a single numerical value method is solved; quantitative analysis and accurate prediction of rock blasting lumpiness are achieved, inclined joints are adopted in the discretization process, actual rock mass joint distribution is better fitted, and the reliability of a simulation result is improved; bulk rocks and excessive crushing phenomena are effectively reduced, the explosion energy utilization rate is improved, the engineering cost is reduced, and a scientific basis is provided for explosion design of projects such as mining and water conservancy and hydropower.

The invention discloses an asymmetric and uncoupled tunnel smooth blasting method. The method comprises the steps that surrounding rock grading data and initial ground stress distribution of a target area are obtained, and a low-damage trial blasting scheme is optimized; drilling operation is conducted on the basis of the low-damage trial explosion scheme, a specific pre-charging place is selected to assemble an asymmetric non-coupling refined charging sleeve device, and a peripheral hole pre-charging sleeve device is further assembled; the peripheral holes are filled through a peripheral hole pre-charging sleeve device, other blast holes are filled in a continuous charging mode, and blocking is conducted after filling is completed; and constructing a detonating network, ventilating after detonating, checking the detonating effect, and iteratively optimizing a trial detonating scheme according to a damage judgment result. According to the method, the acting direction and the acting range of energy during blasting of explosives in peripheral holes can be accurately controlled, so that the disturbance influence of the blasting effect on surrounding rocks is relieved, the blasting damage degree of the surrounding rocks is reduced, construction safety is guaranteed, the occurrence frequency of back break phenomena is reduced, and the construction efficiency can be greatly improved.

The invention provides a simulation material for a mechanical test of a press-fitting explosive, which is prepared from the following raw materials in parts by weight: 65.5% of ammonium sulfate, 27%-33% of aluminum powder, 1.5%-4% of microcrystalline wax, 1%-2% of butadiene rubber and 0.2%-0.8% of graphite. The compressive strength and the tensile strength of a grain formed by pressing the simulation material for the mechanical test of the pressed explosive are basically consistent with those of a grain formed by pressing a polyblack aluminin-2 (JHL-2) explosive, the change trend and the change limit of the strength in the mechanical test process can be truly reflected, and effective reference data are provided for mechanical property evaluation; relatively real and reasonable model parameters are provided for the digital design of the mechanical property of the press-fitting explosive; in an aging test, a tensile test, a mechanical compression test and a dynamic Brazilian test, the simulation material for the press-fitting explosive mechanical test can be prevented from being in contact with energetic explosive components, so that the safety of the test is improved, and the potential safety hazard is reduced.

A downhole system for conveying an explosive tool within a wellbore and reducing damage to other tools of the downhole system. The downhole system comprises a downhole tool string configured for conveyance within a wellbore, wherein the downhole tool string comprises upper tools, a lower tool comprising an explosive charge, and a sub between the upper tools and the lower tool. The sub is configured to attenuate a shock wave caused by the explosive charge when detonated to thereby reduce damage to the upper tools caused by the shock wave. The sub comprises an axial bore and a plurality of radial bores extending between the axial bore and a space external to the sub.

The invention relates to the technical field of geological punching, and particularly discloses geological punching equipment for mining, which comprises driving equipment capable of three-dimensionally adjusting, a mounting disc is fixedly mounted at the bottom end of the driving equipment, and a middle shaft is rotatably mounted in the mounting disc; and a rotating cylinder arranged outside the middle shaft in a sleeving mode is rotationally installed in a groove formed in the bottom end of the installation disc, a drill bit is fixedly installed at the end, extending out of the rotating cylinder, of the middle shaft, a spiral conveying groove is formed in the outer wall of the drill bit, and a soil inlet gap is formed between the rotating cylinder and the drill bit. According to the device, the soil inlet gap is formed between the drill bit and the rotating cylinder, so that muck generated during drilling of the drill bit enters the rotating cylinder, the muck is conveyed out of a blast hole along the rotating cylinder through the spiral piece, and the muck can be conveyed in a dry-type soil moving mode; and the phenomenon that the explosion performance or the explosion effect of explosives in the blast hole is affected by too high water content in the blast hole after slurry circulation is avoided.

The invention relates to an explosion impact test technology, in particular to a solid / gas two-phase explosive wave driven aircraft ground test device and method, and the solid / gas two-phase explosive wave driven aircraft ground test device comprises an anti-static floor, a gas distribution system, a test system, a solid explosive fixed initiation device and a tunnel system, the tunnel system comprises a fixed support, a tunnel, a gas circulator, a first gas exchange pipeline and a second gas exchange pipeline, the gas distribution system comprises a high-pressure gas tank, a high-pressure methane gas cylinder and an air exchanger, and the test system comprises an electronic exploder, a pressure sensor and a flame sensor. Modulation of different overpressures and different durations can be carried out by controlling the solid charge amount, the gas concentration, the solid explosive charge amount, the solid explosive type and the like, the overpressure peak value and the duration of explosion shock waves are adjustable and controllable, and the requirement that external loads of an aircraft continuously change in different flight environments is met.

The invention provides pipeline detection equipment and a method for predicting the bearing capacity of a pipeline, and the equipment comprises an equipment housing which is used for being assembled in a detected pipeline; the advancing device is arranged outside the equipment shell and is used for driving the pipeline detection equipment to move in the detected pipeline; the detection device is arranged on the equipment shell and is used for detecting corrosion data of the detected pipeline; the data processing device is connected with the detection device and is configured to obtain the corrosion data, the pipeline type of the detected pipeline, the environment data and the explosion data; and by adopting an SOM-BP neural network model, at least according to the corrosion data, predicting the minimum explosive amount capable of causing damage to the tested pipeline under the condition that the explosive of a set type is detonated at a preset position. According to the technical scheme provided by the invention, the minimum explosive amount causing damage to the tested pipeline can be obtained, so that the purpose of improving the safety of the tested pipeline is achieved.

The utility model discloses an ore pass dredging device in the technical field of mineral engineering. The ore pass dredging device comprises a mechanical arm and a moving device used for driving the mechanical arm to move in and out of an ore pass and adjusting the angle. The mechanical arm is installed on the moving device, and a fixing mechanism used for fixing explosives and enabling the explosives to be close to the bottom of blocked ore is arranged at the end of the mechanical arm. The explosive is fixed to the fixing mechanism, the mechanical arm is placed into the ore pass, the explosive is made to be close to a blasting area, operators do not need to enter the ore pass and work nearby, and the safety risk can be effectively reduced.

The present invention discloses a method for correcting explosive initial conditions for numerical simulation of underwater explosions. The explosive is approximated as a sphere, and a computational model for a free-field spherically symmetric underwater explosion is established. Initial parameters of the explosive, including initial density and initial internal energy per unit mass of the explosive, are input into the JWL equation of state to obtain preliminary pressure-time curves at different spatial positions. The peak value of the shock wave pressure is extracted and compared with the results of an experiment or empirical formula. If the error does not exceed 5%, the initial internal energy per unit mass of the explosive is maintained unchanged; otherwise, the initial internal energy per unit mass of the explosive is adjusted until the error does not exceed 5%. The bubble pulsation period is determined and compared with the results of an experiment or empirical formula. If the error does not exceed 5%, the initial density of the explosive is maintained unchanged; otherwise, the initial density of the explosive is adjusted until the error does not exceed 5%. The present invention can accurately predict the peak value of the shock wave pressure and the bubble pulsation period, has the advantages of low cost and high efficiency, and can provide more accurate load input for the calculation of three-dimensional underwater explosion models.

The invention discloses a pulse excitation device for structure testing, and relates to the technical field of bridge engineering detection, the pulse excitation device comprises a steel cylinder outer cladding layer, a flange plate and a damping cushion layer, the damping cushion layer is connected with the flange plate through a bolt, and the flange plate is welded with the steel cylinder outer cladding layer. According to the pulse excitation device for the structure test, the explosive is detonated through the blasting fuse, an ideal single pulse load is formed by instantaneous counter-acting force generated when high-pressure gas generated at the moment of explosion of the explosive ejects water at a high speed, and parameters such as the damping ratio, the dynamic impact effect, the natural vibration frequency and the dynamic response of a bridge structure are measured. The shock excitation device does not generate vibration except single impulse force on a bridge structure, the impulse energy is controlled by adjusting the explosive loading amount, the impulse force peak value and the impulse time are controlled by adjusting the water amount and the damping characteristics of the damping cushion layer, and the test accuracy is improved.

The invention relates to an explosive shock wave absorbing structure and a design method, and relates to the technical field of underground mine mining, the wave absorbing structure comprises a core wave-blocking rock and a roadway arranged with the core wave-blocking rock as the center, the core wave-blocking rock is a right triangle or obtuse triangle, one side of the corner with the largest angle is an explosive warehouse connecting roadway, and the other side of the corner with the largest angle is an explosive warehouse connecting roadway. The explosive warehouse connection lane is connected with the underground explosive sub-warehouses, the explosive warehouse connection lane serves as an inlet end of explosive shock waves of the explosive warehouse, the two edge sides and the opposite edge side connected with the corner, with the largest angle, of the triangular structure of the core wave blocking rock serve as shock wave gas buffering lanes, and a safety lane connection lane is arranged at the midpoint of the opposite edge of the corner with the largest angle. Through the engineering arrangement of the explosion shock wave absorbing structure, shock waves generated by accidental explosion of an underground explosive warehouse can be absorbed, so that the effect of protecting main roadways, personnel and equipment at the output end position is achieved.

The explosive welding method suitable for the large-area metal foil / substrate comprises the steps that threads are prefabricated on the periphery of the substrate, holes are formed in the symmetrical positions of the periphery of a wave impedance layer, and a metal foil plate is bonded to the lower surface of a wave impedance plate; the substrate, the supporting plate, the wave impedance plate, the heat absorption layer, the explosive and the detonator are sequentially installed from bottom to top. Wherein the metal foil plate, the wave impedance plate and the heat absorption layer jointly form a combined compound plate; a supporting plate is used for supporting the combined compound plate, a traction wire is adopted to penetrate through a hole in the wave impedance plate, and the traction wire is fixed to a fastener; after prepared explosives are laid on the upper side of the heat absorption layer, fastening pieces are screwed on the base plate, and the tensile force of the traction wires is adjusted through the screwing depth of the fastening pieces till the supporting plate in the middle can be smoothly drawn out; and a detonator is arranged at a detonating point of the explosive. According to the method, the problems of breakage, wrinkling, deformation and ablation of the metal foil plate caused by gap supporting in an explosive welding method are solved; and the welding quality of the metal foil plate and the substrate is improved.

The invention provides a detonation pressure optical testing device for a micro-dose powdery explosive, which comprises a rotating mirror type scanning camera and an explosive detonation unit, and is characterized in that the rotating mirror type scanning camera is used for collecting a shock wave motion trail image when the powdery explosive is detonated; the explosive detonating unit comprises an organic glass column body and a high-pressure exploder, an explosive charging hole with an open top is formed in the organic glass column body in the axial direction, a stress wave adjusting rod is arranged in the explosive charging hole in a penetrating mode, and the bottom face of the stress wave adjusting rod can make contact with powdery explosives charged into the explosive charging hole; a first detonating hole and a second detonating hole are coaxially formed in the organic glass column body in the radial direction, and both the first detonating hole and the second detonating hole communicate with the charging hole; the heating wire penetrating through the first detonating hole, the charging hole and the second detonating hole can make contact with the powdery explosive in the charging hole, and the two ends of the heating wire are connected with the positive electrode and the negative electrode of the high-pressure exploder correspondingly. According to the invention, a traditional detonation mode is not needed, the interference of the detonator and the explosion expanding explosive on the measurement process of the sample with the small explosive quantity is solved, and the test convenience and the test precision are improved.

The invention relates to the technical field of explosive welding methods for composite plates, in particular to an explosive welding compounding method for a silver-steel composite plate. The method comprises the following steps that firstly, the surfaces of a silver plate and a steel plate are subjected to polishing treatment and film pasting protection; 2, a novel explosive is adopted, and explosive parameters are determined, specifically, the detonation velocity ranges from 1700 m / s to 1800 m / s, the brisance ranges from 6.5 mm to 6.8 mm, and the unit dosage ranges from 12 kg / m < 2 > to 15 kg / m < 2 >; and the optimal explosive welding distance is determined, wherein the height of the distance between the silver plate and the steel plate is 4-8 mm. According to the prepared silver-steel composite plate, effective metallurgical bonding of the silver plate and the steel plate is achieved, the bonding strength is far higher than that of other composite methods such as explosive welding, the defects of breakdown, wrinkling, tearing, jet flow accumulation and the like generated by a conventional welding method are effectively overcome, and meanwhile the phenomenon that the mechanical property does not reach the standard is avoided. Compared with other composite methods, the explosive welding process has the advantages that common calcium carbonate and bran are added and mixed with the explosive, low detonation velocity and appropriate brisance are obtained, the content of the explosive is reduced, and the cost is low.

According to the pneumatic skin shape correcting device and method, a female die and a base of the shape correcting device have an interlocking function in a natural state, and the shape correcting device has the functions of providing ultrahigh pressure edge tonnage and releasing ignition sparks by means of magnetic force transmission under the condition that a coil is powered on; explosive is placed in the shape correcting device, a coil is electrified to magnetize the shape correcting device, magnetic force transmits magnetic induction to promote the magnetic induction switch to discharge and detonate the explosive, and high-temperature and ultrahigh-pressure gas is instantly generated to impact the inner surface of the semi-finished product; and after explosion, the coil is continuously electrified, the female die and the base are magnetized to generate ultrahigh pressure edge tonnage to seal explosion heat energy, and the high-pressure retention time is prolonged, so that inner surface layer materials of a semi-finished product are compacted through hot pressing, the grain ultrafine area is microscopically shrunk, and surface tension for counteracting springback is formed. The method has the remarkable advantages of high load, low energy consumption, high speed and the like, and can overcome the problem that the large pneumatic aluminum alloy skin is limited by a series of factors such as the solid solution inoculation period, the equipment table top and the tonnage and is poor in die attaching precision.