1320 results about "Grinding process" patented technology

The invention belongs to the technical field of image processing, and particularly relates to an ore grinding and screening monitoring method and system based on image particle size analysis, and the method comprises the steps: collecting an ore image, generating a distance transformation diagram, and constructing an extreme value topology network; calculating the relative topology significance of adjacent maximum value points, and constructing a peak-valley independence index in combination with the spatial distance; performing iterative fusion on the maximum value points based on the peak-valley independence index to obtain a final mark set; and performing watershed segmentation by taking the final mark set as a seed, calculating ore particle size cumulative distribution, extracting a characteristic particle size index, and adjusting grinding process parameters according to the characteristic particle size index. Through the combined constraint of the relative topology saliency and the peak valley independence index, the method can adapt to multi-scale features and effectively eliminate the interference of the surface texture of the ore, solves the problem of over-segmentation caused by rough surface in the traditional method, and realizes the real-time optimization, energy conservation and consumption reduction in the grinding process.

The invention discloses a method for forming a shallow trench isolation structure, and belongs to the technical field of semiconductors, the method for forming the shallow trench isolation structure comprises the steps of forming a first stop layer on a substrate, etching the first stop layer and a part of the substrate, and forming a trench; an insulating material is deposited in the groove and on the first stop layer, a second stop layer and a sacrificial layer are sequentially deposited on the insulating material, and the insulating material, the second stop layer and the sacrificial layer are provided with recesses in the groove; the sacrificial layer is ground and thinned until the second stop layer is exposed, and part of the sacrificial layer is reserved at the concave position of the second stop layer; and synchronously etching the second stop layer and the sacrificial layer until the second stop layer is completely removed. A stop layer and a sacrificial layer are deposited on an unground insulating material, the height difference of a wafer surface film layer is preliminarily compensated by using a grinding process, and then the residual film layer is synchronously consumed by using an etching process, so that the height difference of the insulating material is reduced, and the difficulty of a CMP (Chemical Mechanical Polishing) process is reduced.

The utility model discloses a grinding type coal rock gas generating device which comprises a box body frame, and a lifting supporting unit, a grinding driving unit, an upper clamping unit, a lower clamping unit, an upper grinding convex rod, a lower grinding concave rod, a middle clamping unit, a gas collecting unit and a temperature control unit are arranged in the box body frame. The coal rock grinding device is scientific in principle, simple in structure, easy to install and good in sealing performance, coal rocks are ground in a sealed environment, meanwhile, temperature control in the grinding process is achieved, and therefore the accuracy of coal rock grinding test data is improved, gas generated in the coal rock grinding process can be collected, and the coal rock grinding efficiency is improved. Therefore, a reference basis is provided for researching the abrasiveness of the coal rock.

The utility model discloses a magnetic suction lining and double-medium energy-saving ore grinding system, which comprises an ore feeding port, an overflow type mill cylinder, a magnetic suction lining, double grinding media, a hollow shaft neck and a reverse spiral blade, the whole magnetic suction lining has magnetism and is tightly attached to the overflow type mill cylinder by means of magnetic force; double grinding media are arranged in the overflow type mill cylinder and are used for grinding minerals; a hollow shaft neck is arranged at one end part of the overflow type mill cylinder body and is used for discharging mineral products; an ore feeding opening is formed in the other end part of the overflow type mill cylinder body and is used for guiding a sand setting product of the hydraulic classification cyclone to enter the overflow type mill cylinder body; reverse spiral blades are arranged on the hollow shaft neck, and the rotating direction of the blades in the ore grinding operation is opposite to the rotating direction of the overflow type mill barrel. Through the multi-layer and multi-link fine design, the whole ore grinding process is more efficient and accurate, and the utilization rate and the production efficiency of mineral resources are greatly improved.

The utility model relates to a multi-stage flour processing flour mill, and belongs to the technical field of crop production. The flour mill comprises a flour mill body, a coarse grinding machine and a fine grinding machine, and the coarse grinding machine is composed of a discharging hopper, a material blocking disc, a transmission disc, a driving motor and a grinding assembly and used for conducting preliminary crushing on grains; the fine grinding machine is provided with a protection box, a grinding wheel, a fine-hole leakage net and a scraping plate, secondary submerging of materials is achieved through a material returning plate, a spiral blade feeding device and a rotary rod motor, and particles influencing the eating taste are prevented from occurring in the grinding process. The equipment is of a multi-stage transmission structure, linkage of coarse grinding and fine grinding is coordinated through a belt, a transmission rod and a liftable transmission assembly, and efficient classified collection of flour is achieved in combination with a leakage net and a transmission leakage net. By optimizing the structural design, the problems that a traditional flour mill is low in efficiency and uneven in flour quality are solved, and the flour mill has the advantages of being high in grinding precision, stable in flour yield, convenient and fast to operate and the like.

The invention discloses a one-stop machining method for a high-precision step deep and long hole in a high-voltage switch butt joint. The one-stop machining method comprises the steps that a special tool is adopted for clamping and aligning a workpiece. And oppositely drilling through holes in the two sides of the workpiece by using the combined tool to obtain the through holes. And the combined tool enters the through hole from the two ends of the main hole to bore the right-end stepped hole and the left-end stepped hole step by step. And the coaxiality of the left end stepped hole and the right end stepped hole is detected on the machine. The special tool is matched with the combined tool to complete machining of deep and long holes of parts, on-machine detection can be achieved, defective products are effectively prevented from flowing out, a traditional machining method for the high-precision stepped deep and long holes is broken through, the problem that a drill bit deflects, and consequently a follow-up tool is broken is solved, and the machining efficiency is improved. The high-precision step deep and long hole machining device reduces low production efficiency and product percent of pass caused by out-of-tolerance straightness of a grinding process, and realizes one-stop machining of a high-precision step deep and long hole of a high-voltage switch with higher efficiency and higher quality under the condition of ensuring dimensional precision, form and location tolerance and surface quality.

Turning, laser cladding and polishing integrated equipment for rotary workpieces is characterized in that laser cladding equipment is located above a lathe, two parallel spaced guide rails are arranged on a base in the transverse direction, a turning tool rest device and a polishing device are installed on the two guide rails respectively, and a flow guide plate inclining towards the guide rail on one side is installed between the two guide rails; a first protective cover, a second protective cover and a third protective cover are respectively arranged at the bottoms of the turning tool rest device, the polishing device and the laser cladding equipment; and the lathe, the turning tool rest device, the polishing device and the laser cladding equipment are all connected with a PLC (Programmable Logic Controller). The turning, laser cladding and cylindrical grinding procedures of the rotary parts are integrated, repeated dismounting and clamping are avoided, time is saved, production efficiency is greatly improved, production cost is reduced, meanwhile, the problem that the rotary parts do not meet machining requirements due to repeated clamping of the parts is solved, and good social and economic benefits are achieved.

The utility model relates to the technical field of kitchen waste treatment, in particular to a stirring and smashing cutter with a good grinding effect and kitchen waste treatment equipment using the cutter, the stirring and smashing cutter comprises a rotating cutter shaft and a smashing auxiliary cutter, the rotating cutter shaft is provided with a smashing main cutter, and when the rotating cutter shaft drives the smashing main cutter to rotate, the smashing auxiliary cutter is driven by the rotating cutter shaft to rotate. Materials can be stirred and preliminarily cut up, large kitchen garbage is scattered and cut into small blocks, the materials are cut up through the relative movement between the smashing main cutter and the first auxiliary cutter and the contact of the cutting edges of the smashing main cutter and the first auxiliary cutter, and a grinding gap is formed between the smashing main cutter and the first auxiliary cutter, so that the kitchen garbage can be ground more conveniently. The grinding gap enables the materials to be further extruded and rubbed between the crushing main cutter and the first auxiliary cutter after the materials are cut up, so that fine grinding of the materials is achieved, the size of the materials can be further refined in the grinding process, the processing efficiency of the materials can be improved, and the efficiency of the follow-up processing technology can be improved.

The invention relates to the technical field of optical part machining, discloses a lens grinding control method and system based on real-time curvature feedback, and aims to solve the technical problems of grinding monitoring lag, secondary clamping error and interference of grinding fluid on measurement precision. The method comprises the following steps: starting grinding and synchronously utilizing an air curtain to eliminate liquid film interference in a sampling area; acquiring height coordinates of multiple points on the surface of the lens through a sensor array; solving a real-time curvature radius by using a least square fitting algorithm; grinding pressure and rotating speed are adjusted in a closed-loop mode according to the curvature deviation. The system comprises a grinding execution module, a multi-point laser acquisition module, an environment compensation module and a central control module. According to the scheme, online real-time monitoring and anti-interference measurement in the grinding process are achieved, clamping errors are eliminated, self-adaptive closed-loop control over machining parameters is achieved, and the machining yield, the surface shape precision and the production efficiency of lenses are remarkably improved.

A detachable and combinable cabinet and its assembly method comprises a combinable cabinet; the combinable cabinet includes a plurality of central unit cabinets, end unit cabinets, and connecting components used to assemble a plurality of central unit cabinets and end unit cabinets together; a plurality of the end unit cabinets are respectively positioned at top and bottom of the central unit cabinets; a modular design for the central unit cabinets and the end unit cabinets allows for the combination of units with relatively few specifications to create cabinets of various heights or widths, significantly simplifying the manufacturing process and greatly reducing storage and packaging volume, which facilitates storage, transportation, and protection, saving on shipping costs. It also provides an excellent solution for the production, packaging, and transportation of extra-long, extra-wide, and oversized cabinets. Additionally, it eliminates the need for extensive welding and grinding processes traditionally required in cabinet manufacturing.

The invention relates to the technical field of high-precision grinding machining of screw elements of large extrusion granulation units, in particular to a rapid alignment and positioning device for an involute spline screw element. The problem of relative position deviation of the machined internal spline and the outer contour milling shape caused by a fit clearance in the original machining process is solved, the high-precision machining effect is achieved, the machining precision of the screw element is ensured, and the clamping and positioning errors in the screw element assembling process are reduced.

The present application relates to a kind of low roughness roll surface grinding control method, comprising the following steps: (1) confirming the roll diameter is between 240-260mm;(2) roll surface middle position temperature is less than 35 degrees after grinding;(3) using 320# grinding wheel grinding to surface roughness Ra≤0.25um;(4) using 500# grinding wheel grinding to surface roughness Ra≤0.05um;(5) using 1000# grinding wheel grinding to surface roughness Ra≤0.015um;(6) to 1000# grinding wheel is refined;(7) again using 1000# grinding wheel grinding to surface roughness Ra≤0.015um;(8) using graphite grinding wheel polishing to surface roughness Ra≤0.015um;(9) testing roll surface.The low roughness roll surface grinding control method of the present application uses 320#, 500#, 1000#, graphite grinding wheel four kinds of grinding wheel to grind roll, optimizes the parameter in grinding process, and the mirror surface roll surface roughness obtained by processing is low, less than 0.015um, and the surface quality is high, uniformity is good, and grinding mark is less;At the same time, process control difficulty is small, and operability is strong.

The invention discloses a hydraulic ball centralizer and a drilling and grinding method for a cement plug in a casing pipe, specifically, a drilling and grinding tool is always centered in the rotating process through the hydraulic ball centralizer, and the situation that when the drilling and grinding tool deviates in a shaft, a window opening accident is easily caused on the casing pipe is avoided; meanwhile, a scrap returning channel is arranged on the hydraulic ball centralizer, and scrap blocking accumulated in the drilling process is eliminated, so that the drilling speed is increased, and the purpose of improving the drilling and grinding construction efficiency is achieved; in addition, by optimizing a construction pipe column structure, selecting and matching a drill collar and the like to increase a counter weight, the problems that drilling footage is slow due to the fact that drilling pressure cannot be applied when a cement plug is shallow, and a tool is blocked by chippings in the drilling and grinding process are solved; the drilling and grinding method is an optimized technological method, efficient and low-damage drilling and grinding of the cement plug of the long well section in the large cased well pipe of the gas storage are achieved, and therefore experience and a method for treating the well are provided for an oil field.

A clamp for grinding shaft sleeve type parts relates to the field of shaft sleeve type part grinding devices and comprises an annular support, a plurality of supporting columns distributed at intervals in the circumferential direction of the inner circle face of the annular support and an adjusting mechanism used for controlling the supporting columns to move in the radial direction, and a clamping space used for clamping the shaft sleeve type parts to be ground is defined by the inner ends of the supporting columns. A detachable abrasion-resistant layer is arranged at the position, corresponding to the inner end face of the supporting column, of the outer wall face of the shaft sleeve type part, the hardness of the abrasion-resistant layer is larger than that of the shaft sleeve type part, and the abrasion-resistant layer can rotate along with the shaft sleeve type part. The grinding device can solve the problem that in the grinding process of low-hardness shaft sleeve parts, the outer wall faces of the parts are prone to being scratched.

The invention discloses a wafer precision grinding method based on laser subsurface modification softening, and belongs to the technical field of semiconductor manufacturing. The method is used for carrying out final damage layer removal and surface finish machining on the hard and brittle wafers (such as silicon carbide and diamond) subjected to preliminary mechanical polishing. The method comprises the following steps: (1) detecting the depth of a damaged layer on the subsurface of a wafer; (2) focusing ultrafast laser on the subsurface of the wafer, scanning to form a continuous and compact softened modified layer, controlling the modified layer to extend upwards in the vertical direction, so that the modified layer covers most of the volume of the material to be removed, and only retaining a micron or submicron original hard thin layer on the top layer of the wafer; (3) carrying out nondestructive testing on the modified layer; and (4) an ultra-precision grinding process (such as CMP or PAP) is adopted, the supporting weakening effect of the modified layer on the top hard thin layer and the characteristic that the modified layer is easy to remove are utilized, and all the to-be-machined allowances are rapidly removed at a time. According to the method, on the premise that the high-quality surface is not damaged, the finish machining efficiency of the superhard material is remarkably improved through the mechanism of internal softening and top layer collapse removal.

The invention relates to the technical field of thick-film resistors, and discloses a high-sheet-resistance resistor paste, a preparation method thereof and a thick-film circuit. The resistance paste comprises 6%-24% of a composite conductive phase, 33%-57% of an inorganic binding phase, 2%-6% of a modifier and 22%-38% of an organic carrier. The conductive phase comprises nano-scale / submicron-scale ruthenium dioxide powder and submicron-scale flake silver powder, and the conductivity and the stability are cooperatively guaranteed. According to the preparation method, a secondary dispersing and grinding process is adopted, and a finished product is obtained through coarse grinding, vacuumizing fine grinding and 800-mesh filtering. The thick film circuit adopts an N-group parallel architecture, so that the use amount of conductive phases can be greatly reduced. The problem that traditional slurry is poor in stability under high sheet resistance is solved, TCR is smaller than or equal to 100 ppm / DEG C, resistance precision is within + / -5%, temperature and humidity stability is excellent, cost is low, and the slurry is suitable for high-precision heating scenes such as a new energy automobile heating system.

The invention discloses a wafer grinding control method and system, and the method comprises the steps: carrying out the prediction of an initial grinding parameter through a pre-established thickness-grinding rate model according to the thickness initial distribution data of a wafer; the thickness-grinding rate model is constructed according to grinding process data of a wafer with a groove isolation structure; sending the initial grinding parameters to grinding equipment so as to control the grinding equipment to grind the grinding film layer; monitoring thickness allowance distribution data of the grinding film layer in the grinding process; the initial grinding parameters are adjusted according to the thickness allowance distribution data, and adjusted grinding parameters are obtained; and the adjusted grinding parameters are sent to the grinding equipment so as to control the grinding equipment to dynamically adjust the grinding rate. By adopting the method, the grinding parameters are dynamically adjusted in the grinding process, the process stability is improved, and the chip yield is improved.

The application relates to the technical field of water-reducing agent processing, and discloses a grinding device and process for polycarboxylic high-performance water-reducing agent powder, wherein the device comprises a tank body and a hopper; the upper end of the tank body is provided with an opening, and a cover plate is arranged at the opening; the upper end of the cover plate is fixedly connected with the lower end of the hopper through a support; the lower end of the cover plate is fixedly connected with a circular ring; the lower end of the circular ring is fixedly connected with an annular track; a grinding mechanism is arranged in the annular track; the grinding mechanism performs fine grinding treatment on the water-reducing agent powder through centrifugal force generated in the annular track; and the annular track comprises a first annular groove and a second annular groove. The grinding device and process for polycarboxylic high-performance water-reducing agent powder can continuously grind the water-reducing agent, and the water-reducing agent powder is conveyed through airflow during the grinding process, so that the water-reducing agent powder can be prevented from being accumulated and blocked in the grinding channel, and the airflow can also be used to take away the temperature generated during the grinding process, so that the grinding device can continuously work for a long time.

This invention discloses a grinding tool for a high-rigidity precision mold guide post, relating to the field of guide post grinding technology. It includes a grinding assembly for grinding the guide post and checking its dimensional accuracy. The grinding assembly comprises a grinding component, a support switching component, and an inspection component. The grinding component grinds the guide post, the support switching component clamps and switches the positions of the two guide posts, and the inspection component checks the grinding status of the guide post. The grinding component includes a fixed stage and a moving stage. The support switching component is mounted on the moving stage, and the inspection component is mounted on the fixed stage. Through the operation of the grinding assembly, two guide posts can operate in parallel with station switching, allowing grinding and inspection of the guide posts to be performed simultaneously. A single guide post can quickly switch between grinding and inspection positions, ensuring that one guide post is always being ground while another is being inspected. This utilizes the idle time of existing grinding processes, improving the production efficiency of guide post grinding.

This invention discloses a method for preparing TC4ELI titanium alloy rods with improved fatigue performance of ultrasonic bone scalpels, comprising the following steps: preparing TC4ELI titanium alloy ingots with optimized composition; mixing sponge titanium, aluminum-vanadium alloy, aluminum briquettes, titanium-iron alloy, and titanium dioxide in a certain proportion and pressing them into electrodes, followed by three vacuum melting processes; subjecting the TC4ELI titanium alloy ingots to multi-pass upsetting and drawing forging to obtain square billets; heating the square billets for billet rolling, followed by multi-pass hot continuous rolling into coils; subjecting the coils to annealing, rounding, oxide scale removal, straightening, and grinding processes to obtain finished rods; and tempering the finished rods in a vacuum furnace. The TC4ELI titanium alloy rods obtained by this method possess excellent ultra-high cycle fatigue performance, making them suitable for ultrasonic bone scalpel cutting heads subjected to high-frequency vibration and impact loads, effectively extending the service life of ultrasonic bone scalpels and reducing the risk of scalpel breakage during surgery.

The invention relates to the field of grinding machining, in particular to an automatic glass sheet chamfering device which comprises a rack, a grinding mechanism and a driving mechanism. The glass sheets are horizontally stacked on the rack; the number of the grinding mechanisms is three, the grinding mechanisms are evenly distributed in the circumferential direction of the glass sheet, each grinding mechanism comprises a plurality of grinding blocks and a plurality of partition pieces which are sequentially and alternately stacked in the vertical direction, and the peripheral face of each grinding block is an annular grinding face. The three sets of grinding mechanisms are arranged, the glass sheets can be clamped and positioned, the glass sheets can be ground, compared with the mode that the glass sheets are clamped through suction cups in the prior art, the glass sheet grinding machine can adapt to more glass sheets with different diameters, enough clamping force can be provided, and the grinding process is more stable. And the multiple stacked glass sheets are separated through the separation pieces correspondingly arranged below the grinding blocks, so that the multiple grinding blocks can grind the multiple glass sheets at the same time, the glass sheets do not need to be manually clamped one by one, and the mounting efficiency and the grinding efficiency are improved.

The invention discloses an anti-over-grinding crushing and grinding process for easy-to-argillization ore, which mainly comprises the following steps of: crushing raw ore and transferring the crushed raw ore into a surge bin; ore in the surge bin is transferred to a first double-layer vibrating screen for wet type pre-screening, oversize and intermediate products enter the semi-autogenous mill, and undersize products are pumped to the ore discharge end of the semi-autogenous mill. Ore discharged by the semi-autogenous mill and undersize products enter a second double-layer vibrating screen to be classified, oversize products are subjected to hard rock crushing and then return to an ore feeding belt of the semi-autogenous mill, intermediate products enter a lattice type ball mill, and ore grinding products and undersize products of the second double-layer vibrating screen are combined and pumped into a cyclone to be classified. And underflow of the cyclone is classified by a high-frequency sieve, oversize return to a ball mill for regrinding, and overflow and undersize products of the high-frequency sieve are combined into finished ore pulp to be fed into a sorting process. The process flow is simple, one-stage crushing and ore washing and screening before grinding are adopted, and forced discharging equipment such as a semi-autogenous mill is matched, so that over-grinding can be effectively prevented, and the ore grinding energy consumption is reduced.

The utility model relates to the technical field of pearl sand processing, and discloses pearl sand fine grading grinding equipment which comprises a machine body and a grinding seat fixedly mounted in the machine body, the bottom of the machine body is of an opening structure, a supporting seat is fixedly mounted at the top of the machine body, and a pearl sand containing cylinder is fixedly mounted at the top of the supporting seat; a feeding opening is formed in the top of the pearl sand containing cylinder, a discharging pipe is fixedly installed in the center of the bottom of the pearl sand containing cylinder, the bottom end of the discharging pipe extends into the machine body, a vertical shaft is rotationally installed in the pearl sand containing cylinder, a spiral conveying blade is fixedly installed on the vertical shaft, and the bottom end of the spiral conveying blade extends into the discharging pipe. The pearl sand fine grading grinding device has the following advantages and effects that pearl sand can be sequentially subjected to integrated operation of crushing, fine grinding and fine grinding, the fine grading grinding process of the pearl sand is achieved, the uniformity of the particle size of finished powder is effectively improved, the rework condition is avoided, and the powder making efficiency and quality are improved.

The invention discloses a control method for a preparation process of a high-weather-resistance fluorocarbon powder coating, relates to the technical field of powder coating control, and aims to solve the problems of weather resistance, low-voltage electrostatic spraying adaptability and large production fluctuation in long-term outdoor use. The method comprises the following steps: firstly, constructing a multi-dimensional index system of an extrusion thermal history index, a particle size morphology comprehensive index, an electrostatic spraying adaptability index and a weather resistance comprehensive prediction index; establishing a quantitative relation between process indexes and performance indexes through an extrusion and grinding combined test of a representative formula, and analyzing to obtain a safe operation area meeting spraying and weather resistance requirements; then, data and powder performance of an extrusion section and a grinding and grading section are collected in actual production, batch indexes are calculated, and the process state is judged; and finally, extrusion and grinding process parameters are cooperatively adjusted according to the state information, so that the powder keeps balance among long-term weather resistance, low-voltage spraying adaptability and production stability.

This application relates to the technical field of corrugated paper production, and in particular to a device for correcting the thickness of the adhesive layer of corrugated cardboard. The device includes a base with slide rails symmetrically installed at both ends of the top. When the driving bevel gear rotates, it meshes with the driven bevel gear, causing the driven bevel gear to rotate as well. This rotation of the driven bevel gear drives the threaded rod to rotate. When the threaded rod rotates, it is threadedly connected to the connecting lug, and the two ends of the movable plate slide within the limiting plate. Therefore, the movable plate moves up and down along the axial direction of the threaded rod. The movement of the movable plate causes the connecting plate and dust cover to move up and down, thereby adjusting the height of the grinding roller to meet the grinding and correction needs of corrugated cardboard of different thicknesses. After the vacuum cleaner is started, it sucks in the dust generated during the grinding process through suction heads on both sides of the dust cover, preventing dust from flying. The device is easy to operate and has better practicality.

The utility model discloses a millstone for a grain moisture test crushing mill in the field of crushing equipment, which comprises a static millstone and a movable millstone, a plurality of gear rings which are of concentric circle structures and can be meshed with each other are respectively arranged on the opposite surfaces of the static millstone and the movable millstone, and a plurality of large gear rings close to the inside are wider and higher than a plurality of small gear rings close to the outside. And a plurality of material guide grooves which penetrate through all the gear rings and divide the gear rings into a plurality of gear blocks are further formed in the opposite surfaces of the static grinding disc and the movable grinding disc. The gear rings and the material guide grooves are arranged on the static grinding disc and the movable grinding disc, materials move outwards along the material guide grooves and gaps among the teeth in the grinding process and are ground by the tooth blocks when passing through the connecting portions of the adjacent gear rings, meanwhile, due to the fact that the gaps of the large gear rings on the inner side are large, large particles are crushed firstly, the gaps of the small gear rings on the outer side are small, and then the particles are ground into powder, and the grinding efficiency is greatly improved. And the powder fineness is ensured, the high powder discharging efficiency is achieved, the problem that the temperature rise is too large due to too fast grinding can be avoided, and the moisture loss in the grinding process is reduced.

The application discloses a recovery method for separating titanium from titanium-containing iron tailings, which comprises the following steps: slurry-making of the titanium-containing iron tailings to reach the concentration requirement of a first-stage high-intensity magnetic separation; first-stage high-intensity magnetic separation of the titanium-containing iron tailings, so that the magnetic material enters a grading grinding process; iron removal of the magnetic material after the grading grinding process to obtain iron concentrate; spiral chute gravity separation of the slurry after the iron removal, so that the gravity separation concentrate is used as titanium concentrate, and tailings enter a grading concentration process; the non-magnetic material after the first-stage high-intensity magnetic separation and the tailings after the gravity separation both enter the grading concentration process; coarse-grained material after the grading concentration enters a second-stage high-intensity magnetic separation, so that the concentrate is used as secondary titanium concentrate, and the tailings and fine-grained material after the grading concentration both enter a cloth chute gravity separation, so that the gravity separation concentrate is used as the secondary titanium concentrate, and the gravity separation tailings are discharged into a tailings pond or are dry discharged. The method increases the secondary titanium concentrate product, can improve the recovery rate by more than 15%, and improves the economic benefits.

This invention discloses a metal wire cutting device with a feeding mechanism, relating to the field of metal wire processing technology. It includes: a workbench assembly, the outer wall below the workbench assembly being fixedly connected to the outer wall above a first mounting plate; a wire coiling assembly fixedly connected to one side of a guide plate, and a cutting assembly fixedly connected to the other side of the guide plate; a collecting assembly fixedly connected to the outer wall below the first mounting plate. When the cutting assembly moves downwards and contacts the workbench assembly, it cuts metal wires of different specifications, and simultaneously grinds the cut surface of the metal wire to remove burrs generated during cutting. Through the coordinated work of the cutting assembly and the grinding structure, while the cutting action is completed, a second movable strip, under the action of a second telescopic rod and a first thrust spring, drives a grinding plate to conform to the cut surface, achieving integrated cutting and deburring, eliminating the need for subsequent grinding processes, improving processing efficiency, and enhancing the quality of the cut surface.

This invention relates to an online method for preparing an anti-oxidation coating on the inner wall of a seamless steel pipe, comprising the following steps: placing a steel billet heated to 1000°C to 1300°C on a piercing platform; performing a first piercing by moving the mandrel relative to the steel billet; performing a second piercing on the steel billet after the first piercing; during the first piercing, when the mandrel is submerged in the steel billet, spraying anti-oxidation powder onto the inner wall of the steel pipe using a powder spraying device. Using this online method for preparing an anti-oxidation coating on the inner wall of a seamless steel pipe, anti-oxidation substances can be sprayed onto the inner wall of the steel pipe simultaneously with piercing, solving the technical problem of severe oxidation of the inner wall of the steel pipe during the piercing process through online preparation. This avoids the oxide scale generated damaging the quality of the inner wall of the seamless steel pipe in subsequent piercing processes, avoids the need for additional grinding processes, and even avoids the scrapping of the steel pipe.

This invention discloses a precision grinding process for machining the shaft of a swimming pool pump motor, relating to the field of shaft precision grinding technology. The process includes: Step 1: Establishing an incident window using a coherent jet nozzle, allowing the jet to penetrate the air gap into the grinding zone, first wetting and then introducing the load, and recording the incident window, jet posture, and dressing rhythm as working condition metadata; Step 2: After precision grinding, according to the material type, magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel to obtain thermal damage and residual stress, and combining this with cleanliness to generate a surface integrity label and bind it to the working condition metadata; Step 3: Performing deionized ultrasonic cleaning and rinsing according to the label to remove chloride salts and free iron, rebuilding the passivation film according to specifications using chemical passivation, controlled drying, and clean sealing; Step 4: Under the premise of qualified chemical condition, performing isotropic ultra-finishing and low-plasticity rolling on the sealed working zone to form surface compressive stress and maintain geometric tolerances, quickly indicating inspection and writing back the label.