14results about "Non-mechanical blast generators" patented technology

Device for producing a solid cryogenic abrasive from water, characterized in that the cryo-tube and loading unit form a single unit, wherein one or more spray nozzle blocks, equipped with identical or different interchangeable spray nozzles, are arranged in the cone of the cryo-tube such that the water can be sprayed from below into a cold nitrogen atmosphere of the cryo-tube, and the amount of nitrogen required for ice formation can be introduced from nitrogen nozzles attached to the tube and the lid, and the frozen water droplets immediately fall from the cryo-tube into the loading unit for absorption into the transport gas stream, assisted by the gas pressure generated during freezing.

Methods and devices for treatment of metal surfaces by means of electrically active solid particles that include a step of contact of the solid particles with the electrode of an electric source, a step of shooting the particles towards the metal surface to be treated and a step of transmission of electric charge of the particles on the metal surface to be treated. The transmission of the electricity between the electric source and the metal surface during the step of shooting preferably is by net charge of the particles or by electric conductivity by contact or by electric conductivity by means of voltaic arches. The current applied to the electrode is preferably a DC or a current that contains positive sections and negative sections.

The invention relates to a method and a device for the dry treatment of a metal surface (1) by means of electroactive solid particles (9), comprising a step of bringing the particles (9) into contact with an electrode (3) of a power source (2), a step of projecting the particles (9) onto the metal surface to be treated, and a step of transporting an electrical charge from the particles to the metal surface to be treated. During the projection step, the electrical transmission between the power source (2) and the metal surface (1) is preferably carried out by means of the net charge of the particles (9), or by means of electrical conductivity by means of contact or by means of an electric arc. The current applied to the electrode is preferably a direct current or a current comprising a positive portion and a negative portion. Preferably, an electrically conductive element is present in the medium between the particles (9), which electrically conductive element increases the electrical conductivity between the particles by means of the arc. Preferably, the method involves the step of using abrasive particles simultaneously or continuously with the electroactive particles.

According to the destressing system and method for the armored superconducting coil for nuclear fusion, an ultrasonic destressing device is integrated in key links such as pre-straightening, fine straightening, sand blasting, winding forming and mold falling of a superconducting coil winding production line, and the ultrasonic destressing device is loaded at the position of each stress roller; and synchronous stress elimination in a conductor deformation process is realized. The destressing winding forming of the superconducting coil is finally completed through superconducting coil rotary paying-off, pre-straightening adjustment, circumferential stress scanning detection, ultrasonic stress removal, fine straightening adjustment, secondary ultrasonic stress removal and armor sand blasting treatment. The problem of fatigue damage caused by stress concentration in the superconducting coil development process is effectively solved, the performance stability of the superconducting coil is remarkably improved, and reliable technical guarantee is provided for a superconducting magnet system of a nuclear fusion device.

A method for regulating the flow of media that provides a valve having a first pole piece and a second pole piece that are separated by a working gap through which media may flow. The pole pieces direct a first magnetic field through the working gap. A coil generates a second magnetic field when electrical current is passed through the coil and that second magnetic field is capable of opposing the first magnetic field. The current in the coil is set at a first level that corresponds to a desired low rate of media through the working gap. The actual flow rate that results from the first duty cycle of current in the coil is compared to a desired flow rate and the current can be adjusted if the actual flow rate is different than the desired flow rate.

This invention discloses a magnetic shot blaster, relating to the field of metal surface treatment technology. It includes a housing, bearings, end caps, roller plates, a power roller, a pulley, a drive motor, and a controller. Bearings and end caps are installed at both ends of the housing. Roller plates are fixed to the inner rings of both bearings and are positioned opposite each other. The power roller is placed inside the housing, and connecting shafts are fixed to both ends of the power roller. The two connecting shafts are fixed within the two roller plates. One end of one connecting shaft extends out of the housing and is fixed to a pulley. The pulley is rotatably connected to the drive motor via a belt. A through hole is coaxially formed between the power roller and the connecting shaft. The magnetic attraction mechanism is electrically connected to the power supply and the controller. The advantages of this invention are: the controller allows for range control of the magnetic force on the surface of the power roller, facilitating adjustment of the flow rate of steel shot during adsorption; adjusting the angle of the guide plate with bolts controls the shot blasting angle range, reducing wear and increasing service life.

The invention provides a shot blasting device. According to the shot blasting device, the fatigue strength of a to-be-treated object is improved by applying compressive residual stress to the interior of the to-be-treated object. The device comprises a hollow housing 2 and a vibrating element 3 for vibrating the housing 2. An object to be treated W and a pellet SH are accommodated in the housing 2. Therefore, the vibrating element (3) vibrates the housing (2) in which the object to be treated (W) and the projectile (SH) are accommodated. Thus, the fatigue strength of the object W to be treated is improved by applying compressive residual stress to the inside of the object W to be treated.

The invention provides a sand blasting device and method based on gradient magnetic field force driving, and belongs to the technical field of material processing. The device comprises a feeding bin, a sand accelerating cavity channel, a multi-stage magnetic field driving system, a coil power supply controller, a speed regulating system and a nozzle; the feeding bin is used for blowing ferromagnetic sand into the sand acceleration channel under the action of gas; the multi-stage magnetic field driving system is used for providing gradient magnetic field force for the sand acceleration channel, so that sand is driven by the gradient magnetic field force in a magnetic field area in the sand acceleration channel to generate axial acceleration; the speed regulating system is used for measuring the average speed when the sand material is sprayed out in real time, comparing the average speed with a preset spraying speed and providing a control signal for the coil power supply controller; and the coil power supply controller is used for adjusting the coil current in the multi-stage magnetic field driving system according to the control signal. Driving force in a traditional sand blasting process is replaced with gradient magnetic field force, and the sand blasting efficiency is remarkably improved.

Provided is a shot-peening device capable of improving the fatigue strength of a workpiece by applying compressive residual stress to the inside of the workpiece. The shot-peening device comprises: a hollow housing 2; and a vibration means 3 for vibrating the housing 2. The housing 2 stores a workpiece W and shot SH therein. Due to this configuration, the vibration means 3 vibrates the housing 2 with the workpiece W and the shot SH stored therein. Accordingly, the fatigue strength of the workpiece W is improved by applying compressive residual stress to the inside of the workpiece W.

The invention relates to a method and a device for strengthening the surface of workpieces, in particular of metal ones, by mechanical effects accompanying the impact of small projectiles or by mechanical effects accompanied by the impact of a shockwave induced by plasma created by electric evaporation of a metal foil, wherein the device comprises a polymer strip (32} which is provided with a metal foil (71) on the surface of the side diverted from the surface of the workpiece (10) in which foil bridges (34) are formed to form projectiles (100), further comprising two electrodes (33) and (66) adjacent to the metal foil (71) located on the polymer strip (32),wherein bridges (34) are formed between the contact surface areas (27) of the metal foil (71), and the electrodes (33) and (66) between which the plasma is formed, are mounted in a support body (41), through which flat conductors (44) and (46) are connected to a switch (84) for switching large currents and high voltages with a high-voltage source (83), wherein the polymer strip (32) provided with the metal foil (71) tightly abuts the support body (41) with the electrodes (33) and (66) and the electrodes (33) and (66) protrude above the upper surface of the support body (41) to provide electric contact with the contact surface areas (27; of the applied metal foil (71). The method of strengthening the surface of workpieces (10) by means of the device according to the invention consists in that one cycle of strengthening the surface of workpieces (10) involves the action of an electric current pulse supplied from a high voltage source (83) after closing the switch (84) by conductors (44, 46; to electrodes (33, 66) between which a high voltage is applied, thereby shorting the circuit on the metal foil (71) at the location of the bridges (34) to form a plasma expanding and by a. compressive force acting on the polymer strip (32)part of which hits as a projectile (100) the surface of the workpiece (10), wherein the plasma generated by the electric current pulse, in addition to the expansion pressure, is also accelerated by the electromagnetic Lorentz force (20) caused by the passage of electric current, through this plasma in the generated magnetic field.

The present invention provides a nanolayer-lubricated diamond grinding wheel grinding method based on a shock wave cavitation effect. In the method, after a gas pressure regulation valve is turned on, a shock wave generated by an acceleration tube pushes nanoparticles to move forward, and the nanoparticles are then accelerated by a small de Laval nozzle to acquire a high initial velocity. One wave source of a shock wave speed-increase module generates a high-frequency high-strength shock wave, to impact nanoparticles with an initial velocity, to enable the nanoparticles to be continuously accelerated downward in an axial direction of a large de Laval nozzle, until the nanoparticles are embedded on a grinding wheel surface at a maximum speed to form a nanolayer. The other wave source is used to clean impurities on the grinding wheel surface. In a processing process, the nanoparticles of the nanolayer are autonomously released in a core grinding region, to implement self-lubrication and cooling inside the grinding region. This method significantly enhances lubrication and cooling effects and satisfies the green development idea.

The present invention relates to a method and apparatus for strengthening the surface of a workpiece, particularly a metal workpiece, by the mechanical effect accompanying the impact of a small projectile or by the mechanical effect accompanying the impact of a shock wave caused by plasma generated by electrolytic deposition of a metal foil, the apparatus comprising a polymer strip (32) having a metal foil (71) on a surface facing away from the surface of the workpiece (10) on which a foil bridge (34) is formed to form a projectile (100), and further comprising two electrodes (33) and (66) adjacent to the metal foil (71) located on the polymer strip (32), the bridge (34) being formed between the contact surface areas (27) of the metal foil (71), the electrodes (33) and (66) between which the plasma is formed being attached to a support (41), through which the flat conductors (44) and (46) are connected to a switch (84) for switching a high current and high voltage with a high voltage source (83), the polymer strip (32) having the metal foil (71) being connected to the electrodes (33) and The electrodes (33, 66) together with the polymer strip (32) are firmly abutted against the support (41), and protrude above the upper surface of the support (41) to provide electrical contact with the contact surface area (27) of the attached metal foil (71). The method for strengthening the surface of a workpiece (10) using the device according to the invention consists in the fact that one cycle for strengthening the surface of the workpiece (10) comprises the action of a current pulse supplied by the conductors (44, 46) from a high voltage source (83) after closing a switch (84) to the electrodes (33, 66) between which a high voltage is applied, thereby short-circuiting the metal foil (71) at the location of the bridge (34), forming an expanding plasma which acts by a compressive force on the polymer strip (32), parts of which impact the surface of the workpiece (10) as projectiles (100), and the plasma generated by the current pulse is accelerated not only by the expansion pressure but also by the electromagnetic Lorentz force (20) caused by the passage of the current through this plasma in the generated magnetic field.

The invention belongs to the technical field of artificial joint machining, and particularly relates to a device for machining an artificial joint through magnetic jet. The device is composed of a material cylinder, a stirring device, a hydraulic pump, a spray gun structure, a workbench, an electric lifting platform, a clamp, a polishing device and the like. Wherein the stirring device can stir magnetorheological fluid in the material cylinder, the hydraulic pump is matched with the pipeline to convey the magnetorheological fluid, the spray gun structure sprays the magnetorheological fluid to the surface of the artificial joint, and a polishing wheel of the polishing device is composed of a soft magnetic shell and an electromagnetic coil and can generate a specific magnetic field. The device is compact in structure and low in cost, through the unique design of the polishing wheel and the spray gun, the removal function stability and the polishing energy are effectively improved, the machining distance is enlarged, the machining precision of the artificial joint is higher, the effect is more uniform, and the device is particularly suitable for machining of the complex special-shaped curved surface titanium alloy artificial joint.

The invention discloses a scale-adjustable ultrasonic-assisted rotating line jet flow polishing device which comprises a power source, a sleeve, a hollow rotating flange plate, a nozzle flange plate, a dynamic balance unit, a jet flow length adjusting unit, a jet flow width adjusting unit, a jet flow adjusting plate, a fixing shell, a gear switching unit, an overall fixing support and an ultrasonic generator. According to the ultrasonic-assisted rotating line jet flow polishing device with the adjustable size, through high-frequency vibration of the tail end of the ultrasonic amplitude-change pole in the conical flow guide cover, abrasive particle flow ejected from the nozzle opening has a pulse effect, and the material removal rate is remarkably increased. Meanwhile, due to the adjustable design of the nozzle opening, on one hand, the area of a polishing area is increased, on the other hand, the jet size can be automatically adjusted according to different workpiece surface requirements, and the product applicability is greatly improved. By means of the rotating function design of the device, the linear jet flow forms a cylindrical polishing area, and efficient and high-quality polishing of the surfaces of complex parts is achieved.