190 results about "Metal sphere" patented technology

The invention discloses a phased array weather radar calibration method based on a generalized metal ball calibration theory. Comprising the following steps: in a microwave anechoic chamber, collecting two-dimensional antenna pattern data of a phased array weather radar in at least one working mode and pointing to a plurality of different beams; performing numerical integration on the two-dimensional antenna pattern data, calculating a combined beam main lobe solid angle of the transmitting antenna and the receiving antenna, and calculating an equivalent beam width product; calculating a calibration theoretical reflectivity factor of the metal ball based on the product of the theoretical radar scattering sectional area and the equivalent beam width of the metal ball; actual detection echo data of the phased array radar on the metal ball under different working modes and beam pointing is acquired, and an actual reflectivity factor is calculated; and comparing the actual reflectivity factor with the calibration theoretical reflectivity factor to complete calibration of the phased array weather radar. Aiming at the non-Gaussian working mode of the phased array weather radar, the reflectivity factor of the phased array weather radar can be quantitatively evaluated, and the radar detection performance is improved.

The utility model discloses a metal spherical powder screening device which comprises a blowing and knocking mechanism, a support, a material frame and a screening frame, the material frame is connected with the support through a spring, a vibration mechanism used for driving the material frame to vibrate is arranged on the material frame, the screening frame is installed on the material frame, and a main discharge port is formed in the material frame and located below the screening frame. The blowing and knocking mechanism is arranged below the screening frame and comprises a plurality of air blowing pipes capable of blowing air upwards and a knocking structure capable of knocking the screening frame. According to the device, the knocking structure is used for knocking the screening frame, compact solid ball powder particles blocking the screen can be separated from the screen, meanwhile, the blowing pipe is used for continuously blowing high-speed airflow to the bottom of the screening frame, and the compact solid ball powder particles blocking the screen move upwards and are thoroughly separated from the screen. It can be seen that the problem that solid metal spherical powder blocks meshes of the screen can be solved to a great extent.

The invention provides a metal ball calibration device and method applied to a millimeter wave ceilometer, and the device comprises an upper pedestal which is fixed at the bottom of the millimeter wave ceilometer; the lower base is fixed on the ground and is rotationally connected with the upper base; the end part of a main body of the driver is hinged in the lower base, and the end part of a driving part of the driver is hinged in the upper base. According to the technical scheme, conversion of the millimeter wave ceilometer between the calibration state and the working state can be achieved, and when the millimeter wave ceilometer is calibrated, by inclining the angle of the millimeter wave ceilometer, on one hand, the length of the rope between the unmanned aerial vehicle and the metal ball can be reduced; the length of the rope meets the requirement that the unmanned aerial vehicle is located outside the beam irradiation range of the millimeter-wave ceilometer; as the unmanned aerial vehicle is located outside the beam irradiation range, interference sources are reduced, and the test precision is improved; furthermore, due to the reduction of the length of the rope, the controllable degree of the unmanned aerial vehicle on the metal ball is also improved, the accuracy of position control on the metal ball is greatly improved, and the test efficiency is improved.

The present invention discloses a spirally series-connected compact multi-chamber arc-extinguishing structure, which is cylindrical as a whole, and is provided with a plurality of layers of disk-type structural units in series inside, and the plurality of layers of disk-type structural units are spirally ascending as a whole; each layer of disk-type structural units is composed of a plurality of metal spherical electrodes, and a semi-enclosed arc-extinguishing chamber between the metal spherical electrodes; each layer of disk-type structural units is connected by the end electrode of the disk-type structure between adjacent layers and the head electrode of the adjacent layer, and the semi-enclosed arc-extinguishing chamber between the electrodes. Compared with the basic structure of vertical series connection, the present invention can increase the number of arc-extinguishing chambers per unit height, improve the arc-extinguishing ability of the structure as a whole, and reduce the volume of the overall multi-chamber structure. It is convenient to use in a multi-chamber type lightning protection device. When this structure is applied to the field of line lightning protection, lightning damage can be removed in time, the lightning tripping rate can be greatly reduced, and the safe and reliable operation of the transmission line can be ensured.

The invention discloses a metal ball anti-swing method for metal ball calibration of a meteorological radar, and relates to the field of meteorological radars, comprising the following steps: S1, acquiring related information of a metal ball, a flying position and a radar; s2, determining a second rope length between the metal ball and the damping object according to the first rope length and the radar; s3, the mass of a damping object is determined according to the mass of the metal ball, and the shape of the damping object is determined; s4, the two ends of a connecting rope with the second rope length are connected with the metal ball and the damping object correspondingly; s5, the unmanned aerial vehicle is released at the releasing position, and at the beginning of releasing, the overall shaking amplitude of the metal ball and the damping object is reduced; according to the method, the influence of environmental wind and unmanned aerial vehicle movement on the stability of the metal ball is reduced to the greatest extent, the swing amplitude of the metal ball in the air is reduced, the time spent on aligning the antenna to the metal ball is shortened, and the accuracy of a calibration result is improved.

The invention provides an induction melting feeding ultrasonic atomization pulverizing system and method, and belongs to the technical field of metal powder material preparation. The induction melting system is used for melting metal raw materials, generated metal melt is sprayed out through a nozzle and drips on an ultrasonic vibration workbench, inert gas is ionized through a tungsten needle electrode tip in the plasma electric arc melting system, the dripped melt which is not atomized in time and cooled is assisted to continue to be heated, and the molten metal is melted. Under the action of ultrasonic atomization vibration, the melt liquid level is broken to generate a molten pool. And under the action of ultrasonic waves, molten liquid in the molten pool is broken to generate small fog drops, and the fog drops are rapidly cooled under the action of surface tension in the inert gas environment to form the metal spherical powder. Continuous operation of ultrasonic atomization powder preparation can be achieved, the conditions of hollow powder and satellite powder are reduced, and the prepared metal spherical powder has the advantages of being high in sphericity degree (larger than or equal to 0.95), high in compactness (larger than or equal to 99%) and narrow in particle size distribution (smaller than or equal to 60 micrometers).

The present disclosure relates to a printed circuit board including: an insulating layer, a through-hole penetrating the insulating layer from an upper surface to a lower surface of the insulating layer and having an inclined wall surface; a metal ball disposed within the through-hole and in contact with the inclined wall surface; and a metal via filling the through-hole and surrounding the metal ball.

The invention discloses a weather radar metal ball calibration precision improving method, and belongs to the technical field of metal ball calibration, and the method comprises the following steps: carrying out the quantification of a background clutter error of a metal ball calibration position, and removing the background clutter error in the calibration process: constructing a metal ball stability model, and carrying out the calibration of the metal ball stability model; dynamic errors caused by swinging of the metal ball body are quantified and compensated; after the background clutter error is removed and the stability of the metal ball meets a certain condition, the deviation error of the metal ball from the beam center is quantized and compensated; and meanwhile, the cross-library phenomenon of the metal balls is identified, adjusted and compensated. According to the method, the calibration precision of the metal ball of the weather radar is improved.

The utility model discloses a measurement standard device for calibrating sensitivity indexes of a metal detector, which comprises a test block support fixing seat without metal components, a test block support and a metal test block, and the test block support is arranged on the test block support fixing seat; the metal test block is arranged on the test block bracket; the measurement standard device is provided with a plurality of metal test blocks, each metal test block comprises a body, and the bodies do not contain metal components; the body is internally provided with a metal ball accommodating cavity, the metal ball accommodating cavity is used for placing or not placing metal balls, and the diameters of the metal balls placed in the metal test blocks are different. The device disclosed by the utility model can be used for simulating the metering performance of various metals, so that the metal detector can be used for calibrating various metal detection sensitivity indexes.

The present invention relates to a polishing layer comprising a closed-cell elastomer formed by separating a continuous polyurethane substrate comprising the reaction product of an isocyanate-terminated prepolymer and a curing agent by pores of 5-100 [mu] m in size; the polishing layer comprises a polishing surface, a ball with the mass of m and the diameter of L is freely released at the position h above the polishing surface, the height h1 from the bottom of the metal ball to the polishing surface is the moment when the ball makes contact with the polishing surface and the metal ball bounces upwards till the linear speed is equal to 0, and when h ranges from 490 mm to 520 mm, the mass m of the ball ranges from 15 g to 19 g, and the diameter L of the ball ranges from 15 mm to 17 mm, h1 is the height h1, and h2 is the height h1. The loss height h2 is equal to h-h1-L, and the loss height h2 is between 280 mm and 440 mm; the polishing layer is controlled to be within the range, the prepared polishing pad shows good polishing performance, the TEOS removal rate is high, the grinding rate non-uniformity is low, the Defect is few, and the comprehensive performance is excellent.

The invention relates to an all-metal spherical lens antenna which comprises a metal lens of a spherical structure, a plurality of first feed source antennas are arranged below the metal lens, and each first feed source antenna is fixedly connected with a supporting column in the metal lens through a supporting frame; the metal lens is composed of a plurality of metal plates, the distances between the metal plates are equal and smaller than the half-wavelength of the highest working frequency, all the metal plates are parallel to one another, the parallel metal plates form an air-filled parallel slab waveguide, and after electromagnetic waves of the first feed source antenna are transmitted to the metal lens, the electromagnetic waves are transmitted to the metal lens. The incident electromagnetic waves propagate along the air gap between the metal plates, the emergent phase of the incident electromagnetic waves after passing through the metal lens is adjusted by changing the angle between the metal plates and the first feed source antenna, and when the phase error is minimum, high-gain radiation is achieved. The spherical metal lens structure is realized by using the combination of the metal flat plates, and the minimum phase error is realized by changing the inclination angles of the metal flat plates, so that the high-gain radiation wave beam is realized.

A method for improving axial movement of a main ball seat of a flange connection V-shaped thrust rod is characterized in that the main ball seat adopts a metal ball joint, an outer spherical inner sleeve of the metal ball joint is pressed in a shell of the main ball seat of the V-shaped thrust rod, and an inner spherical outer sleeve is pressed on a mandrel of the main ball seat; the bottom of the outer spherical inner sleeve and the bottom of the inner spherical outer sleeve are limited and positioned by an inner hole step of a main ball seat shell of the V-shaped thrust rod and a lower step on a main ball seat mandrel respectively, and axial elastic compensation devices are arranged on the upper portion of the outer spherical inner sleeve and the upper portion of the inner spherical outer sleeve respectively. The axial clearance of the outer spherical inner sleeve and the inner spherical outer sleeve is eliminated through axial compensation of the axial elastic compensation device, and axial movement of the outer spherical inner sleeve and the inner spherical outer sleeve during operation is prevented. The axial elastic compensation devices are arranged at the upper parts of the outer spherical inner sleeve and the inner spherical outer sleeve of the metal ball joint of the main ball seat, so that the axial movement of the outer spherical inner sleeve and the inner spherical outer sleeve during operation is eliminated, the structure is simple and practical, and the noise generated by the axial movement of the main ball seat can be effectively eliminated.

To provide an inclinometer that can measure inclination angles by preventing a sliding state in which the measured value continues to move in accordance with vibration even under severe engine vibration, has a simplified structure, and is highly versatile. [Solution] This inclinometer is constructed by filling a cylindrical container member 01 with a viscous liquid 02, putting a metal ball 03 inside, and sealing both ends with caps 04. When the side of the R-surface of the cylindrical container member is placed as the bottom, the metal ball is located at the deepest point of the R-surface, and when tilted, it moves gently to the new deepest point, so the inclination angle can be measured from the position of the metal ball before and after the movement. Furthermore, by using a flexible material for the cylindrical container member and bending the cylindrical container member, the size of the R-surface angle can be adjusted according to the application, and by making the cap detachable, the viscosity of the viscous liquid can be changed, and a vibration suppression effect according to the application can be achieved.

The invention relates to a geometric parameter calculation and performance evaluation algorithm based on an integrated motif, which is applied to the integrated motif comprising a geometric parameter calculation module, a spatial resolution module, a contrast module, a uniformity module and a spatial accuracy module. Comprising the following steps: calculating geometric parameters of a CBCT system by using position information of a metal ball in a geometric parameter calculation module and known information; acquiring a line spread function of the metal wire by using position information and known information of the metal wire in the spatial resolution module, and then calculating the spatial resolution; sampling by using position information and known information of an annular insertion block in the contrast module; automatically selecting a center area and a peripheral area of a uniformity module to carry out gray value average value calculation to obtain uniformity information of the image; and the distance and the included angle between the positioning small holes are calculated by using the position information of the positioning small holes in the space accuracy module and known information. According to the invention, high-frequency, high-precision and low-cost performance evaluation requirements in the research and development process can be met.

The application belongs to the technical field of low-altitude aircraft detection, and particularly relates to a static electricity radar device for low-altitude aircraft detection and a working method thereof. The device comprises: a metal spherical shell configured to be grounded; an insulating material arranged on the surface of the metal spherical shell; a plurality of static electricity sensing electrodes embedded in the insulating material, the plurality of static electricity sensing electrodes being arrayed on the surface of the metal spherical shell, and the normal directions of the plurality of static electricity sensing electrodes converging at the geometric center of the metal spherical shell; and a signal processing module comprising a gating unit, a conditioning unit and a processing unit. The gating unit is connected to the static electricity sensing electrodes and is used for selecting specified static electricity sensing electrodes to be connected to subsequent circuits in time. The conditioning unit is configured to convert the induced charge signals into voltage signals and amplify and filter the voltage signals. The processing unit receives the digitized static electricity signals, and analyzes the spatial pose information of the low-altitude aircraft according to the signal intensity difference of different static electricity sensing electrodes. The spatial positioning of the low-altitude aircraft is realized by using the static electricity sensor array.

The invention discloses a preparation method of high-purity refractory metal spherical powder, which comprises the following steps: preparing high-purity refractory metal of which the initial shape is a block, cleaning and drying the refractory metal, smelting the refractory metal into alloy metal liquid, carrying out vacuum suction casting on the molten metal liquid, pouring a material into cooling water after suction casting is completed, and carrying out ingot casting and cooling, so as to obtain the high-purity refractory metal spherical powder. After the cast ingot is cooled, a metal bar is obtained, and finally the metal bar forms refractory alloy powder; the prepared powder is sprayed out through smelting atomization equipment, refractory alloy powder is put into a radio frequency induction plasma device, technological parameters are adjusted, and spherical powder is obtained; oxidation and impurity introduction of powder in the machining process can be effectively reduced through the radio frequency induction plasma device; when the refractory metal spherical powder is prepared, melting or spheroidizing can be achieved only when the metal powder reaches the specific temperature, the metal material can be rapidly and evenly heated through the high-frequency magnetic field effect of radio frequency induction heating, and temperature fluctuation is reduced.

The utility model provides a calibration auxiliary device applied to a millimeter wave ceilometer, and the device comprises an upper pedestal which is fixed at the bottom of the millimeter wave ceilometer; the lower base is supported on the ground and is rotationally connected with the upper base; the sliding rail is fixed on the upper surface of the lower base; the sliding block is arranged in the sliding rail and is in sliding connection with the sliding rail; one end of the supporting rod is hinged to the bottom surface of the upper base, and the other end is hinged to the sliding block; the screw is arranged in the sliding rail, one end of the screw is rotationally connected with the sliding rail, and the screw penetrates through the sliding block and is in threaded connection with the sliding block; one end of the universal joint is fixedly connected with the end part of the screw rod; and the handle is detachably connected to the other end of the universal joint. According to the technical scheme, by inclining the angle of the millimeter wave ceilometer, on one hand, the length of the rope between the unmanned aerial vehicle and the metal ball can be reduced, and because the unmanned aerial vehicle is located outside the beam irradiation range, interference sources are reduced, and the test precision is improved; meanwhile, the accuracy of position control of the metal ball is greatly improved, and the testing efficiency is improved.

This utility model relates to the technical field of rail vehicle components and discloses a uniformly stressed rubber stack for rail vehicles, including a support base. A central metal sphere is fixedly installed inside the support base. A first rubber layer is fixedly installed on the outer side of the central metal sphere. A first supporting sphere is fixedly installed on the outer side of the first rubber layer. A second rubber layer is fixedly installed on the outer side of the first supporting sphere. A second supporting sphere is fixedly installed on the outer side of the second rubber layer. This uniformly stressed rubber stack for rail vehicles has a cylindrical support plate with a first and second inclined surface, reducing stress concentration. Through a multi-layer metal reinforcement structure design, local stress concentration is reduced, dynamic load transfer efficiency is improved, and the longitudinal and lateral stiffness of the rubber stack is increased, resulting in uniform stress distribution, extended service life, longer replacement cycles, lower failure rates, and reduced maintenance costs.

The utility model relates to the technical field of simple harmonic motion analysis under the action of a magnetic field, in particular to a simple harmonic motion analysis device and equipment based on a torsional pendulum under a magnetic field condition, and the device comprises a magnetic field torsional pendulum mechanism, a data acquisition mechanism and a control mechanism, the magnetic field torsional pendulum mechanism comprises a torsional pendulum assembly and a magnetic field generation module, and a metal ball in the torsional pendulum assembly is located in a magnetic field generated by the magnetic field generation module. The data acquisition mechanism comprises an encoder and a photoelectric door, and the encoder is mounted on a rotating shaft of the metal ball and is in contact with the metal ball; the photoelectric door is arranged on a motion path of the metal ball, and when the encoder synchronously rotates along with the metal ball, the edge of a coded disc of the encoder passes through a detection area of the photoelectric door; and the control mechanism is connected with the encoder and the photoelectric door. According to the utility model, automatic data acquisition and processing can be realized, and the motion state of the pendulum ball can be accurately monitored in real time.

To provide a micro-metal sphere manufacturing apparatus capable of stably producing micro-metal spheres with high precision and small variations in sphere diameter. [Solution] The micro-metal ball manufacturing apparatus 1 has a crucible 20 for containing molten metal M and a cooling tower 30 connected vertically to the crucible 20. An orifice 40 is provided at the bottom 24 of the crucible 20, connecting the crucible 20 and the cooling tower 30. The crucible 20 has a pressurized gas supply means 70 for supplying pressurized gas G1. The micro-metal ball manufacturing apparatus 1 has an excitation rod 54 that extends from outside the crucible 20 through the inside of the molten metal M to just before the orifice 40, and a vibrator 53 that is positioned outside the crucible 20 and vibrates the excitation rod 54 in the axial direction. The cooling air blowing means 70 blows cooling air around the entire circumference of the exposed part of the vibrator 53.

The microchannel liquid cooling plate comprises a plate body with an internal cavity, a plurality of regularly arranged blade teeth are arranged in the internal cavity of the plate body, and a plurality of metal balls are filled in gaps between the adjacent blade teeth. The metal balls and the blade teeth are connected in a metallurgical bonding mode and form a disordered micro-channel network in the gaps. The design is reasonable and ingenious, on the basis of form relieved tooth blade teeth, disorderly-arranged metal ball filler is introduced and combined with the form relieved tooth blade teeth, a high-specific-surface-area and strong-disturbance three-dimensional random micro-channel network is constructed, and therefore the heat exchange efficiency is remarkably improved, meanwhile, the process is kept relatively simple, and the cost is controllable.

The invention relates to the technical field of ceiling plate installation, and discloses a lightweight ceiling plate assembly type installation structure and a ceiling plate manufacturing method. Comprising a suspended ceiling keel frame, an embedded block is fixedly connected to the inner wall of the suspended ceiling keel frame, a magnetic block is arranged on the lower surface of the embedded block, a suspended ceiling plate is connected to the interior of the suspended ceiling keel frame in an embedded mode, and a connecting plate is fixedly connected to the upper surface of the suspended ceiling plate; a magnetic block can be attracted to the inner bottom wall of the embedding base to magnetically attract and fix the embedding base, a first sliding block is used for being extruded and influenced by the magnetic block, a limiting block can drive a metal ball to move to extrude a first spring, the metal ball can be attracted to the magnetic block to fix the embedding base again, the ceiling plate is convenient and fast to install and not prone to falling off, and the ceiling plate is convenient to mount and high in practicability. The honeycomb core structure is clamped by the double-layer suspended ceiling plates, the weight of the suspended ceiling plates can be reduced, the purpose of light weight can be achieved, the weight of the suspended ceiling is greatly reduced through the honeycomb structure, the load on a building structure is reduced, and the safety of a building is improved.

The invention provides a spacecraft based on a spherical solar cell array as a shell, the spacecraft comprises a spacecraft spherical shell, the spacecraft spherical shell comprises a metal spherical shell and solar cells arranged on the metal spherical shell, and heat pipes with heat transfer capability are uniformly distributed and attached on the inner side surface of the metal spherical shell. A polyimide film is attached to the surface of the idle outer side, without the solar cell, of the heat absorption area of the spherical shell of the spacecraft. The invention further provides a thermal control design method of the spacecraft based on the spherical solar cell array as the shell. Compared with the prior art, the spacecraft with the spherical solar cell array as the shell and the thermal control design method of the spacecraft have the advantages that the spacecraft with the spherical solar cell array as the shell serves as the basis, temperature equalization is conducted on the spherical solar cell array of the spacecraft through the high-heat-conduction heat pipes, and therefore the spherical solar cell array keeps a small temperature gradient.

The invention discloses a wafer packaging structure and a wafer packaging method.The wafer packaging structure comprises a cap and a wafer which are oppositely arranged, a device structure is arranged on the wafer, a sealing ring is arranged between the cap and the wafer, and therefore a sealing cavity is defined by a metal layer and an organic material layer in the cap, the sealing ring and the wafer; the metal layer in the cap comprises a first metal region and a plurality of second metal regions which are insulated from each other, the second metal regions are electrically connected with the device structure through metal bumps, and metal balls electrically connected with an external power supply are arranged on the second metal regions; therefore, the device structure obtains the electric energy of an external power supply through the metal bumps, the second metal regions and the metal balls, breaks through the existing MEMS wafer level packaging mode, optimizes the process flow, shortens the process time, reduces the cost, and improves the production efficiency. In addition, the metal protruding block is located in the sealing cavity and can support the cap structure, so that the cap structure is firm and stable.

A spherical designer electromagnetic surface plasmon open resonator is provided. The open resonator includes a resonator inner core and a resonator outer shell. The resonator inner core is located in an inner center of the resonator outer shell, and the resonator inner core and the resonator outer shell are coaxial. The disclosure provides a device that implements the superscattering function for incident waves in all incident directions and in all polarization directions, and a spherical open resonator is implemented. The scattering cross section of the disclosure can be more than five times greater than that of a metal sphere of the same size, and the operating frequency can be flexibly designed. By utilizing the characteristic that the scattering cross section of the spherical designer electromagnetic surface plasmon resonator is much greater than its own geometric cross section, the electromagnetic super-scattering device can be implemented.

The invention relates to the field of preparation of metal spherical powder, in particular to a preparation method of niobium alloy spherical powder, and a spherical powder preparation process including coarse powder recycling is constructed by integrating plasma rotating electrode powder preparation and induction plasma spheroidizing processes. The fine powder accounts for more than 99% of 15-53 [mu] m and can be directly used for 3D printing, and the coarse powder is more than or equal to 53 [mu] m; and carrying out hydrogenation, ball milling, secondary screening, induction plasma spheroidizing and vacuum dehydrogenation on the coarse powder, and mixing the coarse powder with the fine powder to obtain the final niobium alloy spherical powder. According to the technology, efficient preparation of the high-quality niobium alloy spherical powder is achieved, the proportion of the finished product 15-53-micron fine powder is larger than or equal to 96%, the fine powder yield is larger than or equal to 85%, the oxygen content is smaller than or equal to 250 ppm, the spheroidization rate is larger than or equal to 95%, and the technology is suitable for powder bed laser melting additive manufacturing and suitable for the fields of aerospace, nuclear power, military industry and the like.

The utility model discloses a traction mechanism of an electric tractor, which comprises an integral component, a traction component and a traction component, and the integral component comprises a hook main body, a buffer cylinder and a mounting seat; the rotating assembly comprises a first metal plate, a bearing rod, a second metal plate, a metal ball body, a T-shaped column, a bearing block, an oil inlet groove and an inclined V-shaped oil outlet groove; a metal ball is movably connected between the first metal plate and the second metal plate, the side portion of the bearing block is movably connected with a hook body, oil inlet grooves are formed in the tops of the first metal plate and the second metal plate, and inclined V-shaped oil outlet grooves are formed in the bottoms of the oil inlet grooves. Lubricating oil can be slowly and continuously poured to the connecting portions of the metal ball body, the first metal plate and the second metal plate, meanwhile, the lubricating oil can flow along the outer surface of the metal ball body, and therefore it can be guaranteed that the lubricating oil is laid to the whole connecting portion, and smooth rotation of a rotating portion in a traction mechanism is guaranteed.

The invention refers to the manufacturing of ball-shaped metal products. The method consists in through heating of round billets made in appropriate size in a mid-frequency induction unit, rolling such billets into balls in a cross rolling mill at 950° C.-1070° C., cooling the balls down to 620° C.-700° C. in a cooling drum with forced air cooling, heating the surface of the balls up to 850° C.-930° C. in a high-frequency induction unit containing a rotating transport tube and multiple inductor sections, quenching the balls to 125° C.-160° C. in a quenching drum where they are cooled by running water, and allowing the balls to self-temper in the containers. The method enables better wear and impact resistance of metal balls when they are made of low-alloy steels, thereby allowing to reduce the carbon mass fraction of the used steel.

The utility model provides a floating disc liquid drainage structure with a ball. The floating disc liquid drainage structure comprises an upper fixing plate, a lower fixing plate, a side wall, a limiting component and a metal hollow ball, the upper fixing plate is provided with a flow guide pipe, the lower fixing plate is provided with a backflow pipe, and the flow guide pipe extends into the backflow pipe; a side wall is arranged between the upper fixing plate and the lower fixing plate and located on the outer side of the backflow pipe. The upper end of the backflow pipe is open, the lower end of the backflow pipe is closed, and an opening is formed in the area, between the backflow pipe and the side wall, of the lower fixing plate; the metal hollow ball is located at the top opening of the flow guide pipe in a floating mode, the movement range of the metal hollow ball is limited through a limiting part, and the limiting part is fixedly installed on the upper fixing plate. Through the design of the annular cavity structure, the floating disc liquid drainage structure with the ball has a better liquid accumulation prevention effect, and is simple in structure and convenient to mount and dismount.