15051 results about "Grinding" patented technology

An apparatus and method is provided for monitoring operation of a roadway grinding/cutting machine of the type configured to travel along a roadway while engaging and grinding the roadway with a grinding/cutting head. A first displacement sensor generates, during the travel, first distance data associated with a distance between a reference level and a location on the roadway ahead of the grinding zone. A second displacement sensor generates, during the travel, second distance data associated with a distance between the reference level and a location on the roadway behind the grinding zone. A processor captures and uses the first and second distance data to determine a depth of cut as grinding/cutting progresses.

The invention is concerned with simulation diamond end face polishing-grinding machining method and the expert polishing-grinding machining. Set stuff and put molding plastics-absorption tray on fixture tray and make the concave face of plastics-absorption tray upside, and the simulation diamond adsorbs on the convexity of the bottom to plastics-absorption tray. Set plastics-absorption tray on the polishing-grinding machining and mill the tine end of simulation diamond on calm millstone. The polishing-grinding machining relates rack with a level millstone at its middle, and there are two level trays. They are centrosymmetric to the axis of millstone on top of millstone and have plastics-absorption tray on them. There is up and down equipment for tray on top of level tray which connecting with two turning axes on two sides of millstone with level rack, and the other end of turning axis has running equipment of turning axis. It has large machining amount of each time, high produce efficiency, good ratio to excellent stuff, long work time, easy operation without waste of material.

The invention provides a powder metallurgy preparation method of a carbon nanotube reinforced aluminum alloy composite material. The method comprises the following steps: pre-preparing micro-nano flake powder of an alloying component, subsequently ball-milling the powder with a carbon nanotube and spherical pure aluminum powder to prepare flake composite powder, and further performing densifying, sintering, thermal deformation processing and thermal treatment to achieve alloying so as to finally obtain the carbon nanotube reinforced aluminum alloy composite material. Uniform compounding of the matrix aluminum powder, the carbon nanotube and the alloying component can be achieved through limited ball-milling, and meanwhile dangerous elements or uneasy grinding elements such as magnesium and silicon which are high in activity and likely to combust and explode are avoided by adopting the stable and easily ground pre-alloying aluminum powder, so that the security and the reliability are improved; in addition, because of large interlayer boundary and small layer thickness distance, the flake structure is beneficial for uniformly dispersing the alloying component and forming refined dispersed separated phase. The method is beneficial for bringing the effects of composite reinforcement of carbon nanotubes and alloy reinforcement into play to the maximum extent, is energy-saving and time-saving, and is safe and feasible.

The invention discloses a method for preparing environment-friendly water permeable bricks by using iron tailings, belonging to the field of comprehensive utilization of iron tailing resources and construction ceramic materials. The method is characterized in that through taking iron tailings as basic aggregates and introducing a certain amount of waste broken glass, an environment-friendly water permeable brick with excellent performance is prepared. The method comprises the following process steps of raw material crushing, ball milling, material dispensing, mixing, drying, molding, sintering, cutting and grinding. The dispensed material comprises the following ingredients in percentage by weight: 30-60% of iron tailings powder, 5-15% waste glass powder, 15-30% of clay, 15-24% of quartz, 5-15% of potash feldspar, and 0.25-1.5% of silicon carbide. The prepared water permeable brick is high in compressive strength, good in abrasion resistance and excellent in water permeability, and accords with national related standards of water permeable bricks, therefore, the method creates a new way for the high-technology and high value-added application of iron tailing resources.

The invention provides a composite material containing a perovskite structure oxide, a preparation method and application thereof. The composite material contains, by weight, 20%-99.99% of the perovskite structure oxide and 0.01%-80% of an oxygen ion conductor oxide. According to the invention, a sol-gel method can be employed to prepare the perovskite structure oxide, a combustion method can be employed to prepare the oxygen ion conductor oxide, and then the perovskite structure oxide and the oxygen ion conductor oxide can be mixed uniformly by means of ball milling or mechanical grinding, thus obtaining the composite material. The invention also relates to application of the composite material in solid oxide fuel cells and solid oxide electrolysis cells.

The invention relates to the technical field of black metal ore exploitation and beneficiation, in particular to a beneficiation process of low-grade magnetite and specularite mixed ore, which is especially suitable for associated magnetite and specularite mixed ore of Zhouyoufang iron ore. The novel beneficiation process is realized according to an operation procedure and the process proceduressuch as ore crushing, one-stage grinding and grading, reselecting, one-stage weak magnetic separation, one-stage strong magnetic separation, two-stage grinding and grading (crude concentrate re-grinding), two-stage weak magnetic separation, two-stage strong magnetic separation, reverse floating and the like. The iron ore is comprehensively recycled, and a high-quality iron concentrate product is produced. The process has the characteristics of energy saving, high beneficiation efficiency and low beneficiation cost.

The invention relates to a grinding and polishing machine for processing ornamental artificial gems, crystals or glass beads, in particular to a full-automatic ornament grinding and polishing machine. The invention discloses the full-automatic ornament grinding and polishing machine with the characteristics of one-step product forming, integration of all working procedures, high production efficiency and simple structure. The invention realizes the full-automatic processing of crystal diamonds and other ornaments by using one machine. In a main scheme provided by the invention, a spindle assembly is arranged in the middle of a rack, the upper end of the spindle assembly is provided with a turntable, the turntable is provided with a plurality of cantilevers which are uniformly distributed by taking a center axis position of the spindle assembly as a center, and the tail end of each cantilever is provided with a mechanical arm; a feeding and discharging integrated assembly, at least onefront grinding integrated assembly, at least one front polishing integrated assembly, a through-connection integrated assembly, at least one rear grinding integrated assembly and at least one rear polishing integrated assembly are respectively distributed on the rack in a working sequence; and all the assemblies are connected end to end.

Bonded abrasive tools, having novel porous structures that are permeable to fluid flow, comprise a relatively low volume percentage of abrasive grain and bond, and a relatively low hardness grade, but are characterized by excellent mechanical strength and grinding performance. Methods for making the abrasive tools utilizing agglomerated abrasive grain are described.

The invention discloses a fine flaky-cryptocrystalline mixed graphite separation technique which comprises the following steps: primary rough grinding and rough separation, quintic regrinding and sextic concentrating, and middling centralized processing. According to the technique, in the rough separation step, the grinding fineness is -0.074mm, and the content is 90-95%; in the concentrating step, the regrinding fineness is -0.045mm, and the content is 90-95%; and thus, the graphite monomer is sufficiently dissociated, thereby sufficiently ensuring the fixed carbon content and recovery rate of the concentrated concentrate. The technique adopts gradually decreased low concentrating concentrations in multiple concentrating process to ensure the dispersity of ore slurry, thereby solving thesevere problem of entrapped impurities in floatation foam; and thus, in the final concentrate, the fixed carbon content is 91.35%, and the recovery rate is 91.30%, thereby solving the problems of lowtechnical indexes, low grade, low recovery rate and high cost in the fine flaky-cryptocrystalline mixed graphite concentrate separation, so that the fine flaky-cryptocrystalline mixed graphite ores are utilized in an efficient, economical and reasonable way.

The invention discloses a double-flexible-grinding-head magnetorheological polishing device. In the device, a vertical gantry of a bed body and an X-axis are both fixed on a horizontal base; a worktable is fixed on a sliding block of the X-axis; a Y-axis is fixed on a horizontal beam of the vertical gantry; and a first Z-axis and a second Z-axis are arrangedon the Y-axis in parallel. A large flexible grinding head is installed on the first Z-axis; and a small flexible grinding head is arranged on the second Z-axis. A high-flow circulation system connected with the large flexible grinding head and a low-flow circulation system connected with the small flexible grinding head are arranged on a trolley. A control cabinet is arranged at the rear part of the vertical gantry; and a circulation system cabinet and a cleaning system are arranged at the side surface of the vertical gantry. The double-flexible-grinding-head magnetorheological polishing device provided by the invention has the advantages of high accuracy, high rigidness, high stability and high dynamic property. The double-flexible-grinding-head magnetorheological polishing device not only can be used for processing of large-caliber phase elements, but also can be used for high-accuracy processing of large-caliber planar optical elements within the range of full caliber. The optimal matching of the processing efficiency and the processing accuracy can be realized.

The invention relates to a method for reusing common steel slag. The method comprises the process links of performing hot closed treatment on slag, airing, sieving, performing magnetic separation and grinding and particularly comprises the following steps of: transporting red hot common steel slag to a hot splashing field and performing hot splashing; preliminarily crushing large common steel slag with the grain size of more than 2 m to the slag with the grain size of less than 2 m; placing the common steel slag into a hot closed treatment pool and uniformly heating for 30 minutes; covering a cover of the hot closed treatment pool; continuously and uniformly spraying water on the steel slag by using a spraying device in the cover, wherein the water spraying flow is 20 tons per hour and the water spraying time is 7 hours; after stopping spraying water, continuously performing hot closed treatment for more than 5 hours; opening the cover and measuring the temperature to 50 to 80 DEG C and the water content of the common steel slag is 6 to 8 percent; and conveying the steel slag subjected to hot closed treatment to a stacking field and airing for more than 24 hours, wherein the water content is 4 to 6 percent. Compared with the traditional treatment process, the method has the advantages that: metal recycling capacity is high; product grade is high; all the common steel slag can be treated; and the product can be utilized well.

The invention relates to a stainless steel seamless pipe in metallurgical industry and the manufacturing process for the stainless steel seamless pipe; wherein, the steel pipe is made of 00Cr24Ni6Mo2N dual phase stainless steel; the manufacturing process for preparing the ship borne stainless steel seamless pipe comprises the following production steps of a. round steel preparation; b. heating; c. hot-puncturing process; d. end cropping; e. pickling; f. repair grinding; g. lubrication; h. cold rolling processing; i. degreasing; j. solution heat treatment; k. straightening; l. pipe cutting; m. pickling; n. inspection of finished products. The invention solves the problems of lower mechanical strength and extensibility, shorter service life and high prices in present 316L stainless steel pipes used in ship seawater channels and provides a novel ship borne dual phase stainless steel seamless pipe and the manufacturing process and has the advantages of no production of pitting corrosion and grain boundary corrosion of the steel pipes, higher mechanical strength and extensibility, longer service life as well as low price and low cost.

The invention relates to a grinding and polishing pad of consolidation abrasive with self-adjusting function and the preparation method, belonging to ultra-precision grinding and polishing machining technical field, which is characterized in that components of the abrasive layer (3)comprises 1-20% by wt of abrasive with granularity of 1-40 nanometer, 20-80% by wt of acrylic pre-polymer, 1-3% by wt of free radical photo initiator, 0-2% by wt of poly (dimethylsiloxane)/acrylic polymer, 0-20% by wt of adjustment additive with system cross-linking density performance, and 5-40% by wt of acrylic active diluent. The preparation process comprises (1)mixing stock fully and uniformly, (2)preparing rigid polymer matrix, (3)daubing uniformly by screen-printing, and (4)solidifying by ultraviolet cured machine. The invention is provided with stable grinding and polishing performance and self-adjustment performance. It is suitable for precision machining.

The invention relates to the technical field of grinding, and in particular relates to a manipulator grinding system. The manipulator grinding system comprises a grinding robot device and a conveying belt, wherein the grinding robot device comprises a mechanical arm, a grinding tool mounted at the tail end of the mechanical arm, and a grinding bench for fixing a product; the grinding tool comprises a first grinding tool and a second grinding tool; the mechanical arm is provided with a first mounting part and a second mounting part which are arranged in a certain angle; the first grinding tool is mounted at the first mounting part, and the second grinding tool is mounted at the second mounting part; the conveying belt comprises a first conveying belt and a second conveying belt which run oppositely and are arranged up and down; a stop mechanism for stopping the product is arranged on the second conveying belt; and a transplanting mechanism for catching the product from the second conveying belt to the grinding bench is arranged on the conveying belt. Compared with the prior art, the manipulator grinding system disclosed by the invention has complete functions and is compact in structure and higher in automation degree.

The invention provides a combined machining method for chemistry cluster magneto-rheological of a monocrystal silicon carbide wafer. The method based on the magneto-rheological effect comprises the following steps: a monocrystal silicon carbide wafer is pasted on an antimagnetic tool head through a binder; the antimagnetic tool head is mounted on a motor spindle, and swings to a certain extent relatively to a polishing disc while the antimagnetic tool head and the polishing disc rotate around respective axial lines of the antimagnetic tool head and the polishing disc; grinding material and acid-base chemical reagent both mixed into magneto-rheological fluid are used as polishing working solution; small grinding heads with the magneto-rheological effect are produced based on a magnetic substance to limit gathered free grinding material; a flexible polishing film is formed by the array combination of multipoint small grinding heads with the magneto-rheological effect based on the cluster action principle; the distance between a workpiece and an antimagnetic polishing disc and the relative rotating speed of the workpiece to the polishing disc can be controlled to reduce surface defect and layer damage of the monocrystal silicon carbide wafer; and a super smooth surface with high quality can be obtained. According to the invention, the method integrates the advantages of high mechanical efficiency of cluster magneto-rheological and chemocatalysis of chemical polishing; and the polishing efficiency is high.

The invention relates to a metallographic corrosion method for clearly displaying the original austenite grain boundary of a NiCrMoV type rotor steel, and belongs to the field of metallographic sample preparation. The method comprises the steps of: coarse grinding, fine grinding, polishing and corroding; putting a polished sample into a corrosive liquid of 75 DEG C, wherein the formula of the corrosive liquid comprises 200ml of distilled water, 5g of picric acid, 2ml of 5% diluted hydrochloric acid and 4g of sodium dodecyl benzene sulfonate; etching for 2minutes, taking the sample out, cleaning the sample with flowing water, cleaning the sample with alcohol and drying; and observing the clear original austenite grain boundary through an optical microscope. The method has the advantages that a difficult displaying problem of the original austenite grains of the NiCrMoV type rotor steel is solved, the original austenite grain boundary can be very clearly displayed, and the method is simple and practicable.

The invention discloses a polishing film and the preparation method, which adopts the ultrafine micro mist as the grinding material and prepares in flow-casting coating method, namely the powdered or granular resin is dissolved into the organic solvent and then added in functional additive to make the resin adhesive, then the abrasive of surface-modified ultrafine micro mist is added into the resin adhesive and the spread coating liquid can be obtained after fully mixing, finally the paint is painted on the surface of soft base in flow-casting coating method and the polishing film can be obtained after drying and curing. The preparation method of the polishing film has the advantages of small equipment investment, simple operation, high productivity and automation level, steady craft, even film performance and low manufacturing cost. The polishing film can adjust the craft parameters of the flow-casting craft conveniently according to the different quality requirement and standards of the products, and can achieve production in multi-specification and small lot production and overcomes the problems that the rapid transformation of the product specification is difficult due to the limit of the equipment structure in roller coating method.

The invention discloses a high-chromium grinding ball which is prepared from the following materials in percentage by weight: 1.80-3.20% of C, 0.30-1.00% of Si, 0.20-1.00% of Mn, 10.00-13.00% of Cr, 0-0.10% of S, 0-0.10% of P, 0-0.10% of Mo, 0-0.005% of B, 0-0.020% of Ti, 0-0.060% of V and balance of Fe, and is processed by a special secondary modification process, wherein the weight ratio of Ti to B is larger than 3, and the weight ratio of V to Ti is larger than 2.8. The high-chromium grinding ball prepared by using the formula and the process of the invention has the characteristics of favorable wear resistance, high rigidity, high toughness and high impact resistance.

The invention relates to a coarse grain pre-selection and magnetic-floating separation process for mixed ores with embedded micro-fine particles. The coarse grain pre-selection and magnetic-floating separation process is characterized in that a 'half-self-grinding, wet-type pre-selection, continuous ore grinding, weak magnetic-strong magnetic fine screening and re-grinding and strong magnetic reverse flotation' operating system is adopted to sort the mixed ores with embedded micro-fine particles, and iron ore concentrates with grade of 65%-65.5% and yield of 35%-40% are obtained. The coarse grain pre-selection and magnetic-floating separation process has the advantages that 15%-20% large-particle qualified tailings are obtained from the ores through the wet-type pre-selection, the magnetic ores with yield of 15%-20% and grade of higher than 65% can be separated in advance through magnetic-floating separation, the ore feeding amount of separation operation is reduced, the number of flotation machines is decreased, agent using amount is decreased, and ore separation cost is reduced.

The invention relates to a micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process. The micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process is characterized by separating micro-fine disseminated mixed ores through an operating system with semi-autogenous grinding, wet preconcentration, continuous ore grinding, low-intensity and high-intensity magnetic separation, under-size sieve grinding and high-intensity magnetic fine gravitational separation to obtain 65.5-66% of iron ore concentrate at a yield rate of 35-40%. The micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process has the advantages that, by means of a wet semi-autogenous grinding process, crushing operations can be reduced; preconcentrated rough concentrate, after two sections of continuous grinding, can get rid of large-grain gangue and lean locked particles; then by performing separation through a low-intensity magnetic fine sieve regrinding method, qualified-grade concentrate can be obtained and meanwhile feeding capacity of gravitational separation operations can be reduced by 30%. Meanwhile, the micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process is short in process, simple in equipment, easy to operate, free from environmental pollution and capable of saving energy.

The invention discloses a magnetic-gravity combined ore dressing technology for hematite, comprising the following steps of: carrying out dry magnetic separation and jigging gravity separation to obtain blast furnace lump ore, throwing the tailings of the lump ore, carrying out first-stage ore grinding, weak magnetic separation, strong magnetic separation and centrifugal gravity separation on middlings, and carrying out second-stage ore grinding, weak magnetic separation, strong magnetic separation and centrifugal gravity separation. According to the technology, part of qualified blast furnace lump ore (the iron grade is large than 54%) can be obtained in advance, the massive tailings (the iron grade is less than 12%) can be thrown out, the quantity of the ball-milled ore (the middlings) can be greatly reduced, and the grinding and separation energy consumption can be greatly reduced. The massive tailings which are thrown out can replace the macadam and the stone to be taken as the building material, so that the comprehensive utilization of the bulk quantity of the tailings resource can be realized, and the technology is prominent in emission reduction effect; and the whole ore dressing technology is the magnetic-gravity combined ore dressing technological process, so that the flotation reagents can not be consumed, the technology is very friendly to the work environment and the neighboring environment, the environment can be protected, the pollution of the beneficiation reagent to the environment caused by the flotation work can be avoided, and the technology is particularly suitable for the ore dressing of the medium and high-grade (the iron grade is more than or equal to 38%) hematite.

The invention discloses a method for the treatment of waste emulsion, more particularly a method for the treatment of waste emulsion generated in the machining processes such as cutting, grinding and the like. The method comprises the following steps: separation of stored emulsion breakers, mechanical air flotation, ion-carbon electrolysis, coagulating sedimentation, oil separation with inclined plate, microorganism purification, sedimentation, sand filtering, etc.; the method has the advantages of simple technology and standard-reaching wastewater, and devices for the implementation of the method have small floor area, little investment, low running cost, low energy consumption, maximal recycling of waste oil resource and prominent operability and is widely suitable for machining and the treatment of waste emulsion in other industries. The waste oil recycled according to the method is completely capable of being used for the production of patented product, the protective grease, thus idealized application of resources is achieved.