6721 results about "Sand blasting" patented technology

The embodiment of the invention discloses a tubular column string. The tubular column string at least comprises a coiled tubing connector, a mechanical releasing tool, a centering device, a collar locator, a sand blasting perforation sliding sleeve, a hydraulic setting tool and a bridge plug. The sand blasting perforation sliding sleeve, the hydraulic setting tool and the bridge plug are sequentially connected in series in the direction from one end to the other end of the coiled tubing connector of the tubular column string, and the coiled tubing connector is used for being connected with coiled tubing. The whole operation of bridge plug tripping and setting can be completed through coiled tubing equipment, so that less equipment is used in construction, working procedures are few, and manual work is less; pyrotechnics equipment can be avoided, safety performance is high, the coiled tubing equipment is high in adaptability to well conditions, and large-discharge-capacity staged fracturing of a casing horizontal well can be achieved due to the full bore after the bridge plug is removed through drilling. The invention further discloses a bridge plug setting and sand blasting perforation combining method.

The invention relates to an anti-back-splash sand blasting perforator, which comprises a body and a nozzle, wherein a groove is formed in the outer wall of the body; an installation hole is formed in the middle of the groove; the side wall of the groove is inclined; the nozzle is installed in the installation hole; the outer end of the nozzle stretches out from the bottom surface of the groove. The anti-back-splash sand blasting perforator is simple in structure, less in parts, and easy to process and assemble; through the arranged groove and a bulge on the outer end of the nozzle, a flow guide structure is formed around the nozzle, so that back-splash liquid can be timely and uniformly flown when back splashing on the perforator, can be prevented from forming vortex in the groove, and can be prevented from flowing in the groove for a long time; the erosion of the back-splash liquid on the perforator is reduced, and the service life of the perforator is improved.

The invention belongs to the field of super-hydrophobic or super-amphiphobic coating preparation, and particularly relates to a method for preparing durable super-amphiphobic coatings capable of being sprayed. The method particularly includes steps of 1, carrying out cleaning and sand blasting roughening treatment on the surfaces of base materials; 2, preparing resin solution; 3, preparing particle composite suspension; 4, spraying the resin solution obtained at the step 2 on the surfaces, treated at the step 1, of the base materials, drying the base materials and carrying out semi-solidification on resin adhesive; 5, spraying the particle composite suspension obtained at the step 3 on the surfaces of the base materials obtained at the step 4, and drying the base materials to completely solidify the base materials; 6, washing the surfaces of the base materials obtained at the step 5 to obtain the durable super-amphiphobic coatings capable of being sprayed. The method has the advantage that the durable super-amphiphobic coatings with excellent durability and firmness can be prepared on the surfaces of the various base materials by the aid of spraying technologies and have persistent anti-freezing performance.

The invention discloses a composite reinforced wear-resistant part of a metal-ceramic prefabricated member and a manufacturing method of the composite reinforced wear-resistant part. The manufacturing method comprises the steps as follows: uniformly mixing ceramic particles with self-fluxing alloy powder to obtain a mixture; filling a mould cavity of a pressing machine with the mixture, pressing by pressure, forming and demoulding, and placing biscuits and gaskets into a drying box for drying; placing the dried biscuits and gaskets into a vacuum furnace for sintering, cooling and discharging to obtain the metal-ceramic composite prefabricated member; carrying out sand blasting on the prefabricated member, and spraying a layer of nickel-based self-fluxing alloy powder onto the surface of the prefabricated member; and placing the processed fabricated member onto the end surface of a cast cavity, and pouring metal liquid formed by smelting metal matrix materials into the bottom of the cast cavity to obtain the composite reinforced wear-resistant part of the metal-ceramic prefabricated member. According to the manufacturing method, the wear resistance and the impact resistance of the composite wear-resistant part are improved.

The invention discloses a method for surface treatment of an aluminium alloy and a product of the aluminium alloy. The method comprises the steps of punching the aluminium alloy into a required shape; conducting mechanical polishing on the aluminium alloy which is subjected to punch forming; conducting degreasing treatment on the aluminium alloy which is subjected to mechanical polishing in a degreasing agent; placing the aluminium alloy which is subjected to degreasing treatment into an acid liquor tank for first-time anodic oxidation; placing the aluminium alloy which is subjected to first-time anodic oxidation into dye for dying, and conducting hole sealing treatment after dying; conducting screen printing on the surface of the aluminium alloy which is subjected to dying and hole sealing treatment with photosensitive ink, and conducting exposure, developing and photocuring treatment; conducting oxidation film removing treatment on the printed aluminium alloy in an alkaline solution; conducting sand blasting treatment on the treated product of the aluminium alloy; conducting second-time anodic oxidation on the product of the aluminium alloy, which is subjected to sand blasting treatment, and conducting hole sealing treatment on the product which is subjected to second-time anodic oxidation; and removing the photosensitive ink from the surface of the product of the aluminium alloy. The product of the aluminium alloy is processed by the method.

The invention discloses a nano loaded titanium-based electric catalytic film comprising a conductive microporous separating titanium film matrix and a catalytic coating. Furthermore, the invention also discloses a preparation method of the nano loaded titanium-based electric catalytic film, which comprises the following steps of: (1) preprocessing the titanium film matrix by sand blasting, alkali washing, and acid etching: soaking the matrix after sand blasting in an NaOH solution for 0.5 to 2h, then processing for 1 to 2h in an oxalic acid solution with the mass percent concentration of 10 percent after washing to a neutral state, washing with water and drying at 100 to 120 DEG C; and (2) preparing and loading a catalytic coating: preparing the catalytic coating by adopting a sol-gel method, a thermal decomposition method, an electrodeposition method or a chemical vapor deposition method and loading at the surface of the titanium film matrix and in a hole. Furthermore, the invention also discloses a film reactor comprising the nano loaded titanium-based electric catalytic film. According to the nano loaded titanium-based electric catalytic film, the defects on material strength, range limitation of working voltage, catalytic oxidation efficacy and the like in the prior art are solved.

The invention discloses a precision-forging plastic molding technology of a bell shell of a ball-cage type universal joint, comprising steps of warm-forging plastic molding and cold-forging plastic molding. The warm-forging plastic molding technology comprises the following steps: a. blanking; b. manufacturing a blank; c. coating; d. heating; e. directly extruding; f. upsetting; g. extruding reversely; h. normalizing, shaping, sand blasting, parkerising, and treating the surface by a manner of saponification; and adopting the forging plastic molding technology of combining the warm-forging plastic molding technology with the cold-forging plastic molding technology, firstly upsetting to obtain the pre-molding blanking material, secondly, extruding reversely in the chamber of the molding mold to form a ball channel and finally forming the inner spherical surface by using the cold-forging plastic molding technology. The product quality is steady, the production efficiency is improved, the production period is short, the method for adopting the machine tool after the hot-forging is replaced, the workload of the machine tool process is reduced, the precision requirements are met, the manufacturing cost and the period are reduced, and the development trend of the manufacturing field in the world is met.

The surface insulating layer preparing process for roller bearing is to form homogeneous and firm non-metal coating to the surface of bearing through plasma hot spraying process. The preparation process includes the following steps: degreasing the steel base of bearing; shielding the parts needing no surface treatment with steel or copper belt; sand blasting pre-treatment of the base with Ni-Al alloy powder; preparing coating material of alumina-titania alloy with alumina content of 3-13 wt% and size 200-360/micron; spraying the coating material; sealing holes in coating; and final finishing treatment of the coating. The insulated roller bearing is used in motor mainly.

The invention relates to the field of preparation of superhydrophobic coatings, in particular to a preparation method of a persistent icing-resistant superhydrophobic coating. The preparation method comprises the following steps: firstly, carrying out cleaning and sand-blasting roughen treatment on the surface of a substrate; secondly, blending epoxy resin, a curing agent and a first solvent to obtain an epoxy resin solution; thirdly, dispersing submicron particles and nanoparticles into a second solvent, and then adding a silane coupling agent to obtain particle composite suspension; fourthly, spraying the epoxy resin solution obtained in the second step on the surface of the substrate treated in the first step, and partially curing epoxy resin adhesive; fifthly, spraying the particle composite suspension obtained in the third step on the surface of the substrate obtained in the fourth step and completely curing; sixthly, obtaining the persistent icing-resistant superhydrophobic coating. The persistent icing-resistant superhydrophobic coating disclosed by the invention has the beneficial effects that the superhydrophobic coatings prepared on the surfaces of all the substrates have good durability and firmness and persistent icing-resistant property.

The present invention relates to a paving method of the paving layer of the bridge deck of a steel box girder bridge. A resin infusion type paving method of the composite structure of the asphalt concrete steel box girder bridge deck includes three steps: (1) the sand blasting and the derusting of the steel plates of the steel box girder bridge deck; (2) the preparation of materials: (a) the preparation of high-viscosity modified asphalt; (b) mineral aggregate gradation; (c) the preparation of large pored asphalt concrete; (d) the preparation of thermoset resin grouting material; (3) The pavement of the paving layer of the bridge deck: (a) The large pored asphalt concrete is paved on the steel plates of the steel box girder bridge deck, the pavement thickness is 2cm to 4cm, and after final pressure, a large pored asphalt concrete skeleton layer is formed; (b) While the large pored asphalt concrete skeleton layer is still in a hot state, the thermoset resin grouting material is grouted into the large pored asphalt concrete skeleton layer; (c) After the maintenance of three days, a layer of bonding oil is sprinkled, and an asphalt abrasion surface layer with the thickness of 4cm is paved. The paving method is characterized in good interface cohesive property and simple and convenient construction process.

The invention discloses a preparation method of a biomedical porous pure-titanium implant material. The method comprises the steps of S1, constructing a three-dimensional model of the implant material through drawing software, slicing through layering software, conveying the obtained two-dimensional section information to a computer control system of an SLM former, and providing a laser scanning route; S2, paving a layer of titanium powder being 30 to 70 microns in thickness on a workbench of the SLM former through a powder paving layer; S3, performing selective laser meting for the titanium powder through a laser beam under the conditions that the power is 90 to 100W, the scanning spacing is 0.10 to 0.20mm, and the scanning speed is 275 to 540mm/s to obtain a layer of sections of the implant material, and synchronously lowering down the worktable in a distance equal to the height of a layer of powder; S4, repeating the steps 2 and 3 until the three-dimensional model of the implant material is formed; S5, automatically stopping working by the SLM former, cooling the three-dimensional model to reach room temperature, then performing sand blasting to obtain the porous pure-titanium implant material; the three-dimensional model is a porous structural mode using a tetrakaidecahedron unit as a dot matrix and formed by repeatedly accumulating the tetrakaidecahedron units.

The process of forming fluoric stepped hole structure on the surface of pure titanium dental implant includes sand blasting the pure titanium implant, etching in mixed solution of sulfuric acid and hydrochloric acid, etching in mixed solution of hydrofluoric acid and nitric acid, soaking in sodium fluoride solution and other steps. The pure titanium dental implant with stepped hole surface structure has excellent bone tissue compatibility, capacity of raising the combination strength of the implant to the bone tissue and raised long term clinical success rate of dental implant.

The invention discloses a fine forging forming method of spiral bevel gears, comprising the steps of: preparing for a material bar satisfying technical design requirements; heating the material bar to 1150-1180 DEG C; upsetting and punching as well as ring-enlarging the material bar on a press; pre-forging and forming in a pre-forging die on a multistage hot die forging press to obtain a pre-forging blank with pre-forging teeth, wherein the curved tooth spiral angle beta of the pre-forging die is 8-12 degrees smaller than that of a finish forging die; arranging the pre-forging blank on the multistage hot die forging press, and finish-forging and forming in the finish forging die; after a spheroidizing annealing treatment, cleaning the surface by sand-blasting, and phosphating and saponifying the surface; and finishing tooth profiles at normal temperature in a hydraulic machine. The method provided by the invention adopts a gradually forming manner consisting of pre-forging first and finish forging at last, therefore, the radial flow of the blank is greatly reduced, the side pressure of the blank to the tooth profile die cavity is reduced, the tooth profiles of the curved teeth of the forging die are prevented from being damaged, the service life of the forging die is prolonged, the production efficiency is improved, and the production cost can be efficiently reduced.

The invention discloses an on-line high-speed detection system of train wheel set treads and wheel rims and a detection method thereof. The detection system comprises a target detection unit, a speed measurement unit, a location determination unit and an image acquisition unit which are arranged at the outside of tracks in order, and an image processing unit and a control unit, wherein the image acquisition unit comprises multi-group line structure-light sources and a high-speed planar array camera, an intersecting line formed by intersecting the light plane with the wheel set is arranged between a train sand blasting pipe/braking unit and the track, and the imaging filed of the planar array camera covers and is slightly larger than the intersecting area. The detection method comprises: 1, judging whether the wheel set is defective by canny edge detection; 2, calculating the depth of the defects to obtain the size of the defects; and 3, splicing the light band portion of each image in order into an image. According to the invention, the influence of the train sand blasting pipe and braking unit on the detection is avoided, and the detection speed is fast; the system is suitable for 20-300km/h train on-line detection, the precision is high, the detection of the defects which are less than 1mm can be realized; the detection result is displayed in an image, thus the observation is convenient.

The invention discloses system process for conducting efficient strengthened extraction in a surrounding rock. The system process includes that a common drilling machine is used for forming a drill hole through a pneumatic impacter in the surrounding rock, namely a top plate or a base plate, of a coal reservoir, wherein strengthened extraction is planned to be implemented on the coal reservoir, a plurality of spray holes for communicating a coal rock stratum and the drill hole are sprayed through a hydraulic sand blasting perforation method, a plurality of observing holes are distributed with the drill hole as a center, and hole sealing processing is conducted on the drill hole and the observing holes; and fracture is conducted through the drill hole, a fracture affecting range is determined through monitoring pressure change conditions of the observing holes, and operation of draining while extracting with negative pressure through the drill hole and the observing holes is conducted. Preferentially, hole sealing operation is conducted through a grouting hole sealing method. The system process has the advantage that a problem of hole collapsing, drilling machine blocking and the like during hole drilling in a minge layer can be solved; exposing area of a coal mass is increased due to branch holes formed by high-pressure spraying; and hydraulic fracture presses coal and rock mass among cracks, original cracks in a coal layer are fully opened, extend and are communicated with one another, large-range of pressure relief of the coal mass is achieved, and gas extraction rate is improved.

The invention discloses a process for forging a hydrogenated titanium alloy forging blade, which relates to a blade forging process. The invention aims to solve the problems of high forging temperature and material performance requirement of a die and low blade size precision of a titanium alloy blade on the prior aeroengine in the forging production. The process comprises the following steps: 1.filling hydrogen in a titanium alloy blade blank; 2. processing the hydrogenated titanium alloy blade blank into a hydrogenated titanium alloy blade prefabricated blank; 3. carrying out first sand blasting processing; 4.spraying a lubricating agent; 5. placing the hydrogenated titanium alloy blade prefabricated blank in a preheated die; 6. forging to obtain the hydrogenated titanium alloy blade forging blank; 7. removing furs; 8. carrying out second sand blasting processing; 9. washing; and 10. dehydrogenizing to obtain the hydrogenated titanium alloy forging blade. In the method, a hydrogen element is filled in the titanium alloy blade blank; when the hydrogenated titanium alloy blade is forged, the forging temperature can be reduced, thereby reducing the deformation and the abrasion degree of the die and further improving the size precision of the titanium alloy blade.

The present invention relates to film on the surface of medical titanium-base metal material and its sand blasting-micro arc oxidizing compounding process. Through the first surface sand blasting treatment of titanium or titanium alloy material and the subsequent micro arc oxidizing in electrolyte solution containing phosphate radical ion and calcium ion and with the titanium or titanium alloy material as anode, stainless steel or titanium as cathode and DC power source or DC pulse power source, one bioactive film is in-situ formed on the surface of the titanium or titanium alloy material. The bioactive film of rough porous hydroxyapatite has surface roughness Ra of 2-4.5 micron, no interface with the substrate, elastic modulus reaching that of bone and excellent bioactivity, and may be used as the substitute for femur, hip joint, tooth root, etc. The bioactive film has optimized combination strength, stability and bioactivity.

The invention discloses a gear thermal precision forging machining process adopting carburizing steel 20CrMnTi as a material. The process especially comprises the following steps of: upsetting prolonging, blank manufacturing, die forging, burring, forging aftert-reatment (including quenching, tempering thermal treatment; accomplishing the gear thermal treatment through nitriding, surface quenching and normalizing; and finally carrying out sand blasting to remove a scale cinder and the surface acid treatment), and tooth profile cold-finish. By utilizing the process, the fogging process is simplified, the procedures are reduced; the processed product is good in quality; the production in scale can be realized so as to achieve the purposes of good quality, material conservation, energy conservation and time saving; and meanwhile the service life of a mold can be improved greatly, so that the wear resistance of the manufactured gear is enhanced greatly; the gear point-corrosion spalling is overcome; the strength is improved greatly; the service life is prolonged; and the cost is reduced.