2728 results about "Sand blasting" patented technology

The invention discloses a high-rise building operation robot, and belongs to the technical field of engineering construction, the high-rise building operation robot comprises a base, the base is provided with a mechanical arm, a driving mechanism for driving the mechanical arm to move horizontally and a lifting mechanism for vertically moving along a wall surface, the end part of the mechanical arm is provided with a sand blasting gun, two sides of the sand blasting gun are provided with distance measuring sensors, and the base is provided with a wind direction and wind speed sensor; the modeling module is used for fusing sensor data to generate an environment model containing three-dimensional geometric and semantic information and a dynamic wind field distribution model; the cooperation module generates a cooperation control instruction sequence for coordinating each component based on prediction optimization control; the adjusting module corrects parameters of the sand blasting gun in real time through autonomous learning; the execution module generates a driving instruction in combination with feedforward and compliance control; and the decision module monitors and outputs an operation adjustment instruction or a re-planning instruction. The device can sense the condition of the outer wall in real time and dynamically adjust the operation strategy, the adaptability to the complex wall surface is improved, meanwhile, wind disturbance is effectively resisted, and the sand blasting quality is guaranteed.

The invention discloses an underground chamber structure of a compressed air energy storage power station, a construction method and a parameter optimization design method, and belongs to the field of compressed air energy storage and underground space engineering. A hard rock stratum building chamber is determined through systematic site selection investigation, a high-performance concrete lining (containing fiber reinforcement) and a polyurethane buffer layer are adopted to synergistically improve the stability, and a vinyl ester resin-based glass fiber reinforced plastic three-layer composite structure serves as a sealing layer (including a bonding layer, a reinforcement layer and an impermeable layer); the processes of sand blasting pretreatment, stepped joint and the like are combined to guarantee the sealing performance; meanwhile, on the basis of a finite element model, structural parameters are optimized by taking the lowest whole life cycle cost as a target and taking strength, deformation, leakage rate and the like as constraints, and a recommended parameter combination of each structural layer is obtained in combination with an orthogonal experimental design and an improved genetic algorithm. The method is suitable for various geological conditions, the safety, economical efficiency and adaptability of the compressed air energy storage power station are effectively improved, and the method is suitable for large-scale application and popularization.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The invention relates to the technical field of surface engineering, discloses a method and a system for preparing a yttrium fluoride composite ceramic coating through atmospheric plasma spraying, and aims to solve the problems that the yttrium fluoride coating generates a brittle aluminum fluoride layer on the surface of an aluminum substrate due to fluorine ion diffusion, so that the bonding strength is low, and the yttrium fluoride coating is easy to peel off and lose efficacy. The method comprises the following steps: sequentially carrying out mechanical polishing, ultrasonic cleaning and sand blasting roughening on an aluminum base material; preparing composite powder formed by mixing yttrium fluoride, yttrium oxide and nanometer aluminum oxide according to the mass ratio of 75: 20: 5; sequentially depositing a yttrium oxide transition layer, a composite barrier layer and a yttrium fluoride functional layer by adopting atmospheric plasma spraying; and finally carrying out vacuum post-heat treatment. According to the system, through the synergistic effect of the three layers of gradient structures, the transition layer forms an yttrium aluminate metallurgical bonding interface, the barrier layer inhibits fluorine ion diffusion through the dual mechanisms of nanometer aluminum oxide physical barrier and yttrium oxide chemical adsorption, and the functional layer guarantees the plasma erosion resistance. According to the method, the bonding strength of the coating is remarkably improved to 50 MPa or above, the porosity is lower than 3%, stripping is avoided under 500-hour high-energy plasma bombardment, the process cost is reduced by 40%, and the method is suitable for cavity protection of semiconductor etching equipment.

The invention relates to the technical field of spaceflight material forming, in particular to a tension control winding process of a spaceflight carbon fiber composite launch canister, which comprises pretreatment, winding forming, curing and post-treatment. The method comprises the following steps: S1, coating a release agent and a modified coating after processing a core mold, carrying out plasma treatment and eliminating stress; the carbon fiber filaments are soaked in resin containing nanometer components, and are pre-stretched after a hot melting reaction; s2, closed-loop tension control is conducted, winding is conducted according to segmented angles, and modified resin is coated between layers to be overlapped in a crossed mode; s3, stepwise heating and curing, dynamically regulating the pressure and introducing inert gas; and S4, polishing after hydraulic demolding, carrying out sand blasting, carrying out transition layer and ceramic coating, and carrying out multi-dimensional detection. According to the process, the mechanical property and environmental adaptability of the launch canister are improved, the process precision is high, defects are reduced, the forming time is shortened, the rework rate and cost are reduced, the spaceflight requirement is met, and the process is suitable for batch production.

The invention relates to the technical field of coating preparation, in particular to a spraying process of a compact yttrium oxide coating, which comprises the steps of pretreatment, powder activation, matrix surface modification, meltallizing spraying, cooling curing, de-shielding treatment and post-cleaning. Yttrium oxide powder is activated through low-temperature plasma, sand blasting parameters and a high velocity oxy-fuel spraying process are optimized, the porosity of the coating is remarkably reduced to 1.5% or below, and the hardness is improved to 500 HV0.3. Internal stress is reduced in a sectional cooling mode, and balance of coating performance and economical efficiency is achieved in combination with a parameter optimization algorithm based on particle deposition dynamics. The preparation method can meet the requirement of the high-end semiconductor manufacturing field on a high-performance protective coating, and solves the problem of high porosity of a traditional process.

The invention relates to the technical field of ceramic substrates, in particular to a ceramic substrate blank powder coating and sintering process. Comprising the following steps: step 1, uniformly stirring boron nitride powder, terpilenol, ethyl cellulose, butyl benzyl phthalate and phosphate, and grinding to obtain coating powder; step 2, printing powder on the surface of the green body by using a silk-screen printing technology to form a powder pattern; a powder coating green body is obtained; step 3, stacking N powder-coated green bodies to obtain laminated green bodies; 4, the laminated green body is subjected to glue discharging sintering and sand blasting in sequence; and obtaining the ceramic substrate.

The invention provides an acoustic signal-based fault early warning method for a pneumatic sand blasting machine for aluminum profile processing, which relates to the field of fault early warning, and realizes high-precision early warning for the fault of the pneumatic sand blasting machine by fusing acoustic signals and vibration signals and constructing a multi-dimensional energy difference model and a linkage interference index system. The method is especially suitable for abnormal recognition and fault diffusion monitoring in a complex environment in the aluminum profile machining process. By constructing the fault evolution matrix and the high-risk path chain, the propagation trend of disturbance is effectively captured, so that the time-space evolution characteristics of the fault can be recognized and quantified in real time, and the operation stability of the sand blasting equipment and the perspectiveness of fault prediction are remarkably improved.

The invention discloses a preparation process of a sintering kiln silicon carbide guide roller with thermal shock resistance and high-temperature corrosion resistance. The process comprises the following steps: sequentially carrying out surface pretreatment such as reticulate pattern laser engraving, sand blasting and cleaning and drying on a silicon carbide guide roller substrate; performing plasma spraying on a pure aluminum oxide coating after preheating; carrying out segmented laser remelting on the coating to improve the compactness; and finally, coating the nano silicon carbide slurry, calcining and curing. The thermal shock resistance and the high-temperature corrosion resistance of the guide roller are remarkably improved by enhancing the binding force of the coating through laser engraving, optimizing the density of the coating through laser remelting and combining post-treatment of nano silicon carbide slurry, and the service life of the guide roller in a lithium battery positive electrode material sintering kiln is prolonged.

The invention belongs to the technical field of hot rolled strip residual stress control, and particularly relates to a sand blasting device of a hot rolled strip residual stress online regulation and control system, a using method of the sand blasting device and the hot rolled strip residual stress online regulation and control system. The non-uniform residual stress value information of the hot rolled strip is obtained through the obtaining mechanism and transmitted to the determining mechanism, and the determining mechanism determines the sand blasting operation information based on the preset relation between the non-uniform residual stress value information and the sand blasting operation information of the sand blaster; and the control system regulates and controls the sand blasting angle of the sand blaster based on the sand blasting operation information and controls the sand blasting parameters of the sand blaster, the sand blaster sprays sand grains to the hot-rolled strip, and the stress of the hot-rolled strip is regulated and controlled. According to the method, non-uniform residual stress in the production process of the hot-rolled strip is regulated on line, operation is convenient, targeted regulation can be conducted on the part with the large difference value, the strip does not need to be damaged, heat treatment does not need to be conducted on the strip again, and time and labor are saved.

The invention belongs to the technical field of titanium-steel composite plates, and particularly relates to a production process for preventing grain growth of a titanium-steel composite plate, which comprises the following steps: roughening the lower side surface of a titanium plate and the upper side surface of a steel plate by adopting a sand blasting process; an additive is sprayed to the upper side face of the steel plate and the lower side face of the titanium plate, the additive comprises boron powder and a binding agent, graphite foil is laid on the upper side face of the steel plate sprayed with the additive, the titanium plate sprayed with the additive is stacked on the steel plate, and the graphite foil is clamped by the upper side face of the steel plate and the lower side face of the titanium plate to prepare a composite plate blank; sealing the edge part of the composite plate blank by using a sealing material; the production process comprises the following steps: heating a composite plate blank through a heating furnace, rolling and cooling the heated composite plate blank, straightening the composite plate blank through a straightening machine, and trimming the straightened composite plate blank to obtain the titanium-steel composite plate. And the bonding strength and the shearing strength of the titanium steel composite plate are improved.

The invention discloses a spiral water channel sand core integral positioning hot core box which comprises a base and a spiral water channel sand core, a sand shooting device is installed on the upper portion of an upper mold, a transverse moving mechanism is installed at the bottom of a supporting plate and used for driving the upper mold to transversely move, an air duct is fixedly installed on the upper portion of the upper mold, and the lower end of the air duct penetrates through the bottom of the upper mold. A negative pressure fan is fixedly installed on the supporting plate, the air draft end of the negative pressure fan is communicated and connected with the air duct through a hose, positioning pipes are fixedly installed at the two ends of the spiral water channel sand core, and rear sticky blocks are arranged on the inner sides of the side molds and connected with the positioning pipes at the corresponding positions in an inserted mode. The upper mold can be controlled to move through the transverse moving mechanism, so that the position of the sand shooting device is adjusted, during sand shooting, air suction is conducted on the interior of the cavity through the negative pressure fan, fine sand in a hot core box can be sucked out, the forming quality of spiral water channel sand blasting is guaranteed, meanwhile, a spiral water channel sand core is bonded through the rear bonding block, and the production efficiency is improved. The positioning precision of the spiral water channel sand core can be ensured, and the operation labor intensity is reduced.

The invention relates to the technical field of oil and gas well completion sand prevention, in particular to a sand blasting perforation and sand prevention integrated combined operation device and a construction method. According to the technical scheme, a central pipe is installed in the center of an inner cavity of a jet pump assembly, the lower end of the central pipe extends out of the jet pump assembly, a liquid suction opening is formed in the lower middle portion of the jet pump assembly, a liquid outlet is formed in the outer wall of an upper connector, and a mixing cavity and a diffusion cavity are formed between the jet pump assembly above the liquid suction opening and the central pipe. An outlet of the diffusion cavity is communicated with the liquid outlet; the inner side of the central pipe is movably connected with a lower sliding sleeve; a nozzle is mounted on the jet pump assembly outside the lower flow transfer hole; and the inner side of the upper flow transfer hole of the central pipe is movably connected with a middle sliding sleeve. The method has the beneficial effects that the three processes of sand blasting perforation, blockage removal after perforation and ground filling sand prevention are completed by tripping in the tubular column once, so that the times of tripping the tubular column and using ground construction equipment are reduced, the construction efficiency is improved, the construction cost is saved, and the well control risk in the construction process is reduced.

The invention relates to the field of material surface treatment, and discloses a silica gel and metal combined treatment process which comprises the following steps: S1, ultra-short pulse laser is adopted to machine a three-dimensional micro-nano composite structure on the surface of a titanium alloy, the structure comprises a periodic groove array and surface nano holes, and the surface roughness Ra of the titanium alloy is larger than or equal to 5 microns; and S2, a titanium nitride transition layer and a siloxane self-assembly molecular layer are sequentially formed on the roughened titanium alloy surface through atomic layer deposition, and a gradient chemical interface is formed. According to the method, the micro-nano composite structure is processed through ultra-short pulse laser, the interface mechanical embedding area is remarkably increased, the two-dimensional rough limitation of a traditional sand blasting process is broken through, deep barb-shaped anchoring is achieved, the anti-stripping capacity is greatly enhanced, gradient chemical bonding is formed by the atomic layer deposition titanium nitride transition layer and the amino self-assembly molecular layer, and the anti-stripping performance is improved. The thermal expansion difference is effectively buffered, and the interface high-temperature resistance is improved.

The utility model provides a surface pretreatment device for steel plate processing, which relates to the technical field of steel plate processing and comprises a base, a support beam is fixedly mounted on the top surface of the base, a cylinder is fixedly mounted on the top surface of the support beam, a sand blasting cavity is mounted at the output end of the cylinder, and the bottom surface of the sand blasting cavity is communicated with a sand blasting gun. And the top face of the sand blasting cavity communicates with a material guiding pipe and a draught fan, the top face of the base is rotationally connected with a rotating column, and a steel plate fixing table is fixedly installed at the top end of the rotating column. The steel plate fixing table is driven to rotate through a transmission mechanism of the worm and the worm wheel, so that a steel plate can uniformly rotate in the sand blasting process, the surface of the steel plate can be in full contact with sand blasting, insufficient sand blasting in a local area is avoided, and the overall rust removal effect is improved; and the rotating steel plate fixing table enables the sand blasting spray gun to cover the whole surface of the steel plate in a more efficient manner, so that the sand blasting operation time is shortened, and the working efficiency is improved.

The invention relates to the field of precision casting, and discloses a precision casting process for a stainless steel impeller for nuclear power, which comprises the following steps of: S1, pressing a wax mold by using an investment casting process, and connecting the wax mold into a tree shape by using a wax rod; s2, the surface of the wax mold is coated with a refractory material, dewaxing is conducted through dewaxing equipment after drying, a hollow shell is obtained, and then high-temperature roasting is conducted; s3, selecting duplex stainless steel to be smelted in an electric furnace, heating molten steel to a preset pouring temperature, and pouring the molten steel into the shell from the bottom or the side; s4, the shell is removed after being naturally cooled, and solution treatment is conducted on the impeller; s5, carrying out sand blasting, shot blasting and sand cleaning, and carrying out nondestructive inspection; wherein dewaxing equipment used in the step S2 comprises a tank body, a rotatable tray is arranged in the tank body, and a plurality of adjustable fixing clamps are arranged on the tray to meet the fixing requirements of different shells; the top of the tank body is provided with a feed port, a discharge port and an automatic sealing door, and the bottom is connected with a wax liquid collecting tank and is internally provided with a liquid level sensor; the inner wall of the tank body is provided with a heating cavity for containing heating elements, and the outer wall is wrapped with heat insulation materials.

The invention provides a detection, grinding and sand blasting integrated platform for a small complex workpiece. The detection, grinding and sand blasting integrated platform comprises a platform body, a grabbing robot is installed on the table body, and a feeding conveying line, a first visual detection mechanism, a grinding station and a sand blasting station are arranged on the periphery of the grabbing robot. A second visual inspection mechanism is arranged on one side of the polishing station; the grinding station comprises a movable seat used for carrying workpieces, and the movable seat is connected with a translation mechanism. A cleaning assembly is slidably mounted in the polishing station, the cleaning assembly is connected with a locking mechanism, a supporting frame is fixed to the movable seat, and a connecting mechanism is mounted on the supporting frame and used for being connected with the locking mechanism; an unlocking part is arranged on the connecting mechanism; the cleaning assembly is connected with a reset part. The equipment integrates the functions of detection, grinding and sand blasting, one-stop machining of workpieces is achieved, and manual circulation among multiple pieces of equipment is not needed. And meanwhile, based on a visual detection result, self-adaptive polishing path planning is carried out, and a polishing track can be dynamically generated according to the defect type and position.

The invention discloses a processing method of a surface crystal wafer, and relates to the field of surface crystal wafer production. The whole surface crystal wafer is cut from the front side and the back side of the wafer by using a sand blasting and ultrasonic cutting method, and the cut section is arc-shaped based on the sand blasting and ultrasonic cutting method, so that the area of a plated electrode is increased, and the quality of a surface crystal oscillator is improved. The electrode plating operation is carried out based on the whole plate surface crystal wafer, and the essential wet etching step in the traditional processing technology is omitted in the scheme. The invention further discloses a processing method of the surface crystal oscillator based on the whole-board surface crystal wafers, after the whole-board surface crystal wafers are subjected to quality inspection and the positions of defective products are marked, information is uploaded to the server, the whole surface crystal wafers are integrally positioned on the tool, and then the whole-board surface crystal oscillator is processed on the basis of the accurate position of each surface crystal wafer on the whole-board surface crystal wafers recorded by the server and the positions of the defective products. According to the method, the surface crystal wafers are taken one by one by the mechanical arm and fed to the whole plate base, coordinate switching from a regular matrix to a matrix is achieved, the calculation process is simple and accurate, and the step of repositioning in the machining process of the single surface crystal wafer is omitted.

The invention relates to a method for preparing a titanium alloy coating through cold spraying. Belongs to the technical field of cold spraying. The method comprises the following steps: firstly, preparing nanoscale TC4 powder, wherein the average particle size is 20 microns; cleaning and sand blasting roughening are sequentially carried out on the surface of the TC4 substrate under the technological conditions that the air pressure intensity is 0.4 MPa, the sand blasting distance is 10 cm, and the moving speed is 70 cm / min. And spraying and depositing the prepared mixed powder on the surface of TC4 under a certain condition by using a Laval spray gun by adopting cold gas power spraying equipment to form a coating. The cold spraying conditions are that helium is used as working gas, the powder feeding amount is 20 g / min, the moving speed of a spray gun is 1 cm / s, the spraying pressure intensity is 0.3-0.9 MPa, the spraying distance is 2 cm, and the gas temperature is 400-600 DEG C. The TC4 coating is successfully prepared through the cold spraying technology, the TC4 coating is tightly combined with a TC4 base body, and the method can be used for repairing a TC4 titanium alloy workpiece.

The invention relates to the technical field of silicon carbide boat support manufacturing, and particularly discloses a silicon carbide boat support and a manufacturing method thereof.The manufacturing method comprises the following steps that S1, the boat support is designed through three-dimensional modeling software; s2, uniformly mixing the silicon carbide powder with various particle sizes; s3, slurry preparation: stirring and mixing the powder and a curing agent to obtain slurry; s4, the three-dimensional model slices of the boat support are printed and formed through a 3D printing device, and glue is smeared between every two layers of slices; s5, performing hot air drying on the blank in a drying oven; s6, in a vacuum sintering furnace, the blank is subjected to vacuum sintering and glue discharging; s7, the blank is subjected to polishing, machining, sand blasting, purification, ultrasonic cleaning and drying process treatment; compared with traditional injection molding, the silicon carbide boat support is manufactured through 3D printing, mold production and manufacturing can be omitted, and the production cost is reduced; and various forming parameters are visualized, so that the forming difficulty is reduced, and the yield of the silicon carbide boat support is improved.

The invention discloses a production process of a novel copper-based alloy bimetallic synthesis material, and relates to the field of alloy materials.The production process comprises the steps that a copper-nickel alloy is selected as a base material, a titanium alloy is selected as a functional layer, and stress distribution of a bonding layer is designed and optimized through gradient component distribution; preparing a copper-nickel alloy liquid by utilizing vacuum induction melting, supporting and fixing a core rod through three points, and controlling temperature and flow velocity for pouring to form co-growth crystals; the surface of the base material is cleaned through a sand blasting process, a Cu-Ti nano coating is coated through a PVD technology, and a nanoscale convex-concave structure is formed; building a mathematical model of a temperature field and a component diffusion field, and optimizing and combining area temperature distribution and diffusion behaviors through simulation analysis; through gradient temperature control annealing treatment, residual stress is eliminated, and diffusion is promoted; the bonding performance is evaluated by combining shear strength and microhardness tests; and dividing the production process based on the modular design. The method can be widely applied to the industrial fields with high-temperature, high-strength and corrosion-resistant requirements.

The invention belongs to the field of control of residual stress of hot rolled strips, and discloses an online regulation and control system and method for residual stress distribution in the strip production process, and the system comprises a residual stress monitoring system, a control unit and a host part; the residual stress monitoring system is used for carrying out residual stress distribution online regulation and control on the plate strip based on an analytical solution of residual stress and compensation stress of sand blasting; the control unit is a core component of the regulation and control system and is used for receiving and processing a signal and sending an instruction; the main machine part comprises an air pressure rod, a sand blaster and a high-pressure water spraying calandria, wherein the air pressure rod is used for finely adjusting the operation angle of the sand blaster; the method is mainly applied to the period after finish rolling and before coiling in the hot rolling process; the method has the advantages that the non-uniform residual stress of the plate strip is regulated and controlled on line by adopting a sand blasting process, and the sand blasting flow, the operation time and the sand blasting pressure change along with different stress values in an operation interval during the period; continuous production is achieved while accurate regulation and control are achieved, and the plate shape quality is guaranteed.

The utility model discloses a spray gun mechanism and sand blasting equipment. The spray gun mechanism is used for spraying sand towards a first face of a workpiece, a second face opposite to the first face and an outer side face connected between the first face and the second face. The spray gun mechanism comprises a moving assembly, a connecting piece connected with the moving assembly so as to be driven by the moving assembly to move and a spray gun assembly connected with the connecting piece and moving synchronously with the connecting piece, and the spray gun assembly comprises a first spray gun with the adjustable spraying angle, a second spray gun with the adjustable spraying angle and a third spray gun. The first spray gun is used for spraying sand towards the first face, the second spray gun is used for spraying sand towards the second face, the third spray gun is used for spraying sand towards the outer side face, and the first spray gun and the second spray gun are symmetrically arranged and located on the same side of the third spray gun. According to the spray gun mechanism and the sand blasting equipment comprising the spray gun mechanism, the three different surfaces of the workpiece are subjected to sand blasting at the same time through the spray gun assembly, and the working efficiency and the sand blasting yield can be improved.

The invention discloses an expansion sleeve with low expansion pressure and high external extrusion resistance after expansion. The expansion sleeve comprises chemical components in percentage by weight as follows: 0.04%-0.25% of C, 0.1%-1.0% of Si, 0.5%-1.8% of Mn, 0.02%-0.10% of Nb and Plt. Slt, 150 ppm, Slt; 80 ppm, with the balance being Fe and unavoidable impurities. The production method comprises the following steps: smelting and continuously casting molten steel to obtain a proper casting blank; a pipe blank is produced through hot rolling, and it is ensured that the proper size and a good-plasticity organization structure are achieved; pretreating the hot-rolled pipe blank, wherein the pretreatment comprises acid pickling, cleaning, neutralizing, phosphating and saponifying; cold rolling is conducted to achieve the needed size specification, and high size precision is achieved; heat treatment is carried out, and methods such as annealing or hardening and tempering can be selected to optimize the material performance; and the inner surface is subjected to sand blasting or polishing treatment, and anti-rust measures are taken.

The utility model relates to an intelligent cleaning device for a sand box, and belongs to the field of industrial automation and intelligent manufacturing. According to the scheme, the rail type RGV is adopted to automatically convey the sand box to the closed intelligent cleaning work station, and the information of the sand box is read through the RFID tag and synchronized to the information system. The cleaning robot scans the position of the sand box through the visual recognition device, and the tool changing robot grabs the adaptive drill bit from the drill bit tool library according to a system instruction and assembles the adaptive drill bit to the electric hammer chuck. And the cleaning robot drills and dredges the sand guide hole of the sand box, returns to the quick change frame to replace the electric pick, and performs multi-angle shoveling and scraping operation on the cavity of the sand box. And after cleaning is completed, the cleaning robot is switched to the sand blasting gun, and fine sand cleaning on the surface of the sand box is completed. The scheme aims at solving the problems that traditional manual cleaning is low in efficiency, severe in environment and large in potential safety hazard.

The invention belongs to the technical field of new energy and electrochemistry, and particularly relates to a corrosion-resistant structured transition metal alloy electrode suitable for hydrogen production from alkaline water and a preparation method of the corrosion-resistant structured transition metal alloy electrode. The method comprises the following steps: sequentially carrying out sand blasting treatment and electrochemical activation treatment on a nickel net substrate so as to improve the surface roughness and the number of active sites; and then performing constant-current deposition in an electro-deposition solution containing nickel salt and ferric salt and / or cobalt salt, and constructing a nickel-based alloy catalyst layer in a micron array shape to obtain the alloy electrode. Through observation of a scanning electron microscope, the surface of the obtained electrode has a sphere-like microstructure, the arrangement is compact, and the catalytic efficiency and durability can be improved. The prepared structured alloy electrode has the advantages of being high in interface bonding force, high in electro-catalytic performance, high in alkali corrosion resistance and the like, and is suitable for efficient and long-term operation of hydrogen production through alkaline electrolysis of water.

The utility model relates to a sectional positioning sand blasting jig, which belongs to the technical field of sand blasting jigs and is characterized in that a positioning mechanism is arranged on the outer wall of a front jig; the positioning mechanism comprises a reverse side jig movably installed on the outer wall of the front side of the front side jig, a positioning column is fixedly installed on the outer wall of the front side of the front side jig, a first filling base is fixedly installed on the outer wall of the front side of the front side jig, and a second filling base is fixedly installed on the side, close to the front side jig, of the reverse side jig; a first arc-shaped positioning seat and a third arc-shaped positioning seat are fixedly installed on the outer wall of the front side of the front jig, and a second arc-shaped positioning seat is fixedly installed on the side, close to the front jig, of the back jig. According to the segmented positioning sand blasting jig, a product is fixed and limited through the first filling base, the second filling base, the first arc-shaped positioning base and the second arc-shaped positioning base, the attaching area of the product and the jig is reduced, the sand blasting yield is increased, the production efficiency is improved, and the product has higher market competitiveness.

The invention discloses an anti-adhesion conductive ceramic coating and application thereof to a high-frequency electrotome, and relates to the technical field of surface modification. The preparation method of the anti-adhesion conductive ceramic coating at least comprises the following preparation steps: carrying out cleaning and surface sand blasting treatment on a high-frequency electrotome substrate; blending fusible polytetrafluoroethylene powder, hydrophobic nano silicon dioxide particles and modified fluorinated graphene at a high speed to obtain mixed powder; and the mixed powder is sprayed on the surface of the high-frequency electrotome base body subjected to surface sand blasting through a powder electrostatic spraying technology, and after baking and cooling, the anti-adhesion conductive ceramic coating is obtained. The high-frequency electrotome anti-sticking ceramic coating prepared by the invention has good anti-sticking property, tissue adhesion resistance, electrical conductivity and low possibility of falling off.

The invention belongs to the technical field of kitchen ware coatings, and discloses a preparation method of a wear-resistant coating based on nano structure optimization, through a specific ratio of nano silicon carbide, titanium dioxide, boron nitride and silver, four particles form a complementary and synergistic functional system-silicon carbide provides a hardness basis, boron nitride optimizes the antifriction performance by means of a layered structure, and the wear-resistant coating is prepared. Titanium dioxide enhances the chemical stability; by matching with a composite dispersion process of high-energy ball milling and ultrasonic treatment, particle aggregation is broken, so that the coating forms a uniform and compact nano-structure, the structure can effectively disperse friction stress, the wear resistance is remarkably improved, and the service life of the kitchen ware in a high-frequency cooking friction environment is greatly prolonged; a kitchen ware substrate is subjected to 80-mesh white corundum sand blasting to form a rough surface, then impurities are removed through ultrasonic cleaning, and a good interface condition is created for coating adhesion; and a subsequent stepped vacuum curing process promotes chemical bonding of the nanoparticles and the polyimide resin, and the binding force of the interior of the coating and the binding force of the coating and the substrate are enhanced.

The invention belongs to the technical field of material welding, and discloses a titanium alloy welding method which comprises the following steps: pretreating a to-be-welded surface of a titanium alloy; the pretreated to-be-welded surface is subjected to sand blasting treatment and magnetron sputtering treatment, and an iron film is sputtered on the to-be-welded surface; the titanium alloy with the to-be-welded surface sputtered with the iron film is subjected to annealing treatment in the argon atmosphere; and the to-be-welded surface of the sputtering iron film is welded through a diffusion welding process. According to the characteristic that the iron element can promote mutual diffusion of the titanium alloy, surface sand blasting, magnetron sputtering, stress relief annealing and diffusion welding processes are combined, so that the titanium alloy is tight in interface connection and complete in grain, the plasticity is not obviously reduced while the strength of the titanium alloy is kept, and the requirement for large-scale and integrated aero-engines can be met.