52results about How to "Remove less" patented technology

The invention relates to a stainless steel material and a preparation method thereof. The stainless steel material comprises the following components of, by mass percentage, 16-25% of Cr, 12-17% of Mn, less than 0.25% of C, less than 1% of Si, 0.3-0.9% of N, and the balance Fe and unavoidable impurities; the stainless steel material is nickel-free, multilayer and biphase stainless steel; the surface layer of the stainless steel is an austenite structure; and the core of the stainless steel is an austenite-ferrite biphase structure. The provided stainless steel material can be subjected to 24 hsalt mist and 24 h artificial sweat instead of being corroded, does not contain nickel and molybdenum, does not have the nickel allergy risk, is lower in raw material cost, and has the obvious advantages in aspects such as the magnetic property, simplification of a machining technology, and less material removal in the part machining process.

The invention discloses grinding equipment and a magnetic grinding disc kit for tapered roller rolling surface finishing of ferromagnetic materials. The grinding equipment comprises a main body, the magnetic grinding disc kit and a roller circulation disc outer system. The main body includes a base, a column, a beam, a slide table, an upper tray, a lower tray, an axial loading device and a spindledevice. The roller circulation disc outer system includes a roller collecting device, a roller demagnetizing device, a roller conveying system, a roller finishing mechanism and a roller feeding mechanism. The magnetic grinding disc kit includes a pair of coaxial first and second grinding discs of which the front surfaces are disposed opposite to each other. The front surface of the first grindingdisc includes a set of linear grooves radially distributed on a base surface (positive conical surface) of the first grinding disc, the front surface of the second grinding disc includes one or morespiral grooves distributed in the base surface (positive conical surface) of the second grinding disc, and a ring-shaped magnetic structure is embedded inside a base body. The grinding equipment has the finishing ability of multitudinous ferromagnetic material tapered roller rolling surfaces.

The invention relates to a simple method for reducing the influences of impurity elements in ferrophosphorus on LixFeyPzO4 (particularly LiFePO4, LiFe2 / 3PO4 and Li4 / 7Fe4 / 7P8 / 7O4), which comprises: reacting ferrophosphorus with a lithium salt react in an oxidizing atmosphere to obtain a product, leaching the product with acid and filtering the leachate; reacting the filtrate with phosphoric acid or a phosphate, and filtering the reaction solution to obtain high-purity Li3PO4 and FePO4 filtrate; concentrating the high-purity Li3PO4 and FePO4 filtrate, and graduating the concentrate to obtain Li3PO4 and FePO4 intermediates in special shapes; and adding supplementary phosphorus source, iron source or lithium source, mixing the supplementary phosphorus source, iron source or lithium source with the intermediates to perform a reaction in a non-oxidizing atmosphere to obtain the LixFeyPzO4. In the method, clean production is realized by the reaction design, raw material combination and by product utilization. In the method, a reaction process is used to remove the impurity elements in the ferrophosphorus and graduate the Li3PO4 and FePO4, the grain diameter and shape are easy to control, the oxygen amount is easy to control, the ferrophosphorus can replace reducing carbon as a reducer, the influences of the impurity elements in the ferrophosphorus on the LixFeyPzO4, the tap density of the LixFeyPzO4 product is improved, the production process is simple, the process steps are reduced, the reaction is easy to control, the steps are combined organically, no waste liquid is discharged, requirements on equipment are low, the cost is low, the investment is small, and the benefits are good. The method is suitable to be used for producing high-performance LixFeyPO4 from the ferrophosphorus at low cost.

The invention discloses grinding equipment and grinding disc external member for finish machining of the rolling surface of a convexity circular cone roller. The grinding equipment comprises a main machine, the grinding disc external member and a roller circulating disc external system. The main machine comprises a base, a stand column, a cross beam, a sliding table, an upper tray, a lower tray, an axial loading device and a main shaft device. The roller circulating disc external system comprises a roller collecting device, a roller conveying system, a roller cleaning mechanism and a roller feeding mechanism. The grinding disc external member comprises a pair of first and second grinding discs, wherein the front surfaces of the first and second grinding discs are coaxially arranged are arranged in an opposite mode. The front surface of the first grinding disc comprises a group of concave arc grooves radially distributed on the first grinding disc base surface (concave arc rotating surface), the front surface of the second grinding disc comprises one or more spiral grooves distributed on the second grinding disc base surface ( convex arc rotating surface ), and the radius of curvature of the base circle and the radius of curvature of the base surface cutting line of the first and second grinding discs are equal. The grinding equipment and grinding disc external member for finishmachining of the rolling surface of the convexity circular cone roller has the finish machining capability of rolling surfaces of large-scale convexity circular cone rollers.

The invention discloses a femtosecond laser processing method of an optical fiber lens. The femtosecond laser processing method comprises the following steps that a focused femtosecond laser is utilized for conducting scanning on an optical fiber according to the profile of a to-be-prepared lens, and a laser focus point irradiation area is subjected to material modification or etching removal; theend face of the treated optical fiber is partially soaked in a hydrofluoric acid solution, and through selective corrosion removal of materials in the modification area, the optical fiber outside theprofile of the lens is separated to form an optical fiber lens prototype; the corrosion time is controlled, so that the surface of the obtained optical fiber lens prototype tends to be smooth, and then the optical fiber lens is formed. According to the processing method, the processing working procedures are simple, the shape of the optical fiber lens is flexible, no heating effect exists duringprocessing, convex-face optical fiber lenses and concave-face optical fiber lenses in various shapes can be prepared on the end face of the optical fiber, the problems of stress damage and thermal ablation deformation occurring to existing preparing methods are solved, and the femtosecond laser processing method an be applied to optical fiber sensing, optical fiber laser devices and other fields requiring optical fiber coupling.

The invention discloses grinding equipment for accurate machining of the rolling surface of a cylindrical roller and a grinding disc kit. The grinding equipment comprises a main machine, the grindingdisc kit and a roller circulation disc external system, wherein the main machine comprises a substrate, a vertical column, a transverse beam, a sliding table, an upper tray, a lower tray, an axial loading device and a main shaft device; the roller circulation disc external system comprises a roller collecting device, a roller conveying system, a roller arrangement mechanism and a roller feeding mechanism; the grinding disc kit comprises a first grinding disc and a second grinding disc which are coaxial, and the fronts of the first grinding disc and the second grinding disc are arranged oppositely; the front of the first grinding disc comprises a group of linear grooves which are radially distributed on the base plane (right circular conical surface) of the first grinding disc; the front ofthe first grinding disc comprises one or multiple spiral grooves which are distributed on the base plane (right circular conical surface) of the second grinding disc; and the sum of the flaring angles of the base planes of the first grinding disc and the second grinding disc are 360 degrees. The grinding equipment has the capability of accurately machining the rolling surfaces of large quantitiesof cylindrical rollers.

The invention discloses a preparation method of an alloy-plastic composite shell. The preparation method of the alloy-plastic composite shell comprises the steps that a seam in an alloy substrate is filled with a plastic material through injection molding, and pressure maintaining is conducted for 4-7 s under the pressure of 1200-1800 kPa; the pressure maintaining time is prolonged and higher pressure is maintained, so that the plastic material continues to be injected into the seam, and the size of a small gap in the junction of the plastic material and alloy is reduced; and residual acid liquor is little after cutting and grinding and cannot overflow. After a semi-finished product is baked for 30-60 min at the temperature of 160-200 DEG C, anodic oxidation is conducted; the operation of braking treatment is adjusted to be conducted before the operation of anodic oxidation, the plastic material expands to squeeze the alloy after being baked at the high temperature, and the size of the small gap is slightly increased after cooling so that residual acid can be washed away more thoroughly in the anodic oxidation surface-conditioning procedure, residual acid is removed, and thus the situation of acid overflowing is restrained.

The invention relates to a machining process of a flange cover plate. The machining process comprises the following steps that S1, blanking is conducted, specifically, an aluminum plate is selected to be blanked as a cover plate to be machined; s2, arc end face deep drawing, wherein an arc end face cover plate is machined; s3, flat end face stretching, wherein a flat end face cover plate is machined; s4, bending, forming and deep drawing are conducted, wherein a vertical wall cover plate is machined; s5, punching is conducted, specifically, a cover plate with holes is machined; s6, necking, wherein a necking cover plate is machined; s7, hole flanging is conducted, specifically, a hole flanging cover plate is machined; s8, edge cutting, wherein a cover plate to be shaped is machined; and S9, shaping is conducted, wherein a finished cover plate is obtained through machining. The method has the effects of high yield and high processing efficiency.

The invention discloses bacillus flexus Z2 with the preservation number of CCTCC NO: M2018659 or / and a culture or / and a processed object thereof or / and bacillus megaterium Z3 with the preservation number of CCTCC NO: M2018660 or / and a culture or / and a processed object thereof. The two strains have an oxidation effect on ammonia gas and hydrogen sulfide and are resistant to high temperature. Bacillus flexus dry powder or bacillus megaterium dry powder or a bacillus flexus culture solution or a bacillus megaterium culture solution prepared from the strains is applied to livestock and poultry manure or landfill leachate or the bacillus flexus and the bacillus megaterium are evenly mixed in the proportion of (0-100):(0-100) to be applied to a to-be-treated object needing biological deodorization.

The invention relates to a monocrystalline semiconductor wafer having an average roughness Ra of at most 0.8 nm at a cut-off wavelength of 250 [mu]m. The wafer is characterized by an ESFQRavg of 8 nmor less at an edge exclusion of 1 mm. The invention further relates to a method for producing a monocrystalline semiconductor wafer. The method comprises the following steps in the specified order: polishing the semiconductor wafer on both sides simultaneously; locally processing at least part of at least one side of the semiconductor wafer in a material-removing manner by means of a liquid jet, which contains suspended hard-material particles and which is directed at a small area of the surface by means of a nozzle, wherein the nozzle is moved over the part of the surface to be treated in such a way that a predefined geometry parameter of the semiconductor wafer is improved; and polishing the at least one surface of the semiconductor wafer.

The invention discloses a preparation method of a cyperus esculentus protein extract beverage. The preparation method comprises the following steps: step 1, raw material selection: selecting fresh cyperus esculentus with full grains and good maturity as a raw material; step 2, conducting cleaning and soaking; step 3, feeding cyperus esculentus and water into a pulping machine according to a volume ratio of 1: 5 for pulping; step 4, heating cyperus esculentus pulp to 80 DEG C or above and keeping the temperature for 10-15 minutes to inactivate a lipoxygenase in the cyperus esculentus pulp; step 5, conducting vacuum deodorization; Step 6, treating the deodorized cyperus esculentus pulp by using an improved TCA / acetone extraction method; step 7, conducting blending; step 8, conducting homogenizing; and step 9, conducting sterilizing and filling. The cyperus esculentus rich in amino acid variety and content is selected as the raw material, such that richness of plant protein is ensured; and The improved TCA / acetone extraction method is adopted in a preparation process, phenols, lipids and pigments can be well removed, polysaccharides can also be well removed, and more plant proteins can be obtained.

The invention discloses an abrasive device and a magnetic abrasive disk kit for finishing a rolling surface of a cylindrical roller made of ferromagnetic material. The grinding equipment includes a main machine, a magnetic grinding disc set and a roller circulating disc external system. The main engine comprises a base, a column, a cross beam, a sliding table, an upper tray, a lower tray, an axialloading device and a spindle device, wherein the main engine comprises a base, a column, a cross beam, a sliding table, an upper tray, a lower tray, an axial loading device and a spindle device. Theouter system of the roller circulating disk comprises a roller collecting device, a roller demagnetizing device, a roller conveying system, a roller finishing mechanism and a roller feeding mechanism.The magnetic abrasive disk kit includes a pair of first and second abrasive disks coaxially and oppositely disposed facing each other. The front surface of the first abrasive disk includes a set of linear grooves radially distributed on the base surface (right conical surface) of the first abrasive disk, the front surface of the second abrasive disk is the working surface (right conical surface)of the second abrasive disk, and an annular magnetic structure is embedded in the base body of the second abrasive disk. A lapping device of that invention has the finis machining capability of a large numb of cylindrical roller rolling surfaces made of ferromagnetic material.

The invention discloses a grinding device and magnetic grinding disc suite for ferromagnetic material crowned tapered roller rolling surface finish machining. The grinding device includes a main machine, the magnetic grinding disc suite and a roller recirculating disc external system. The main machine includes a base, upright columns, a beam, a sliding platform, an upper tray, a lower tray, an axial loading device and a main shaft device. The roller recirculating disc external system includes a roller collection device, a demagnetization device, a conveying device, a tidying mechanism and a feed-in mechanism. The magnetic grinding disc suite includes a pair of grinding discs including a first grinding disc and a second grinding disc, wherein the first grinding disc and the second grindingdisc are coaxially arranged, and the front faces of the first and second grinding discs are opposite. The front face of the first grinding disc includes a group of concave arc grooves which are radially formed in the base face (concave arc rotation face) of the first grinding disc; the front face of the second grinding disc includes one or more spiral grooves formed in the base face (convex arc rotation face) of the second grinding disc, and an annular magnetic structure is embedded in the base body of the second grinding disc. The grinding device for ferromagnetic material crowned tapered roller rolling surface finish machining has the capability of conducting finish machining on crowned tapered roller rolling surfaces of large-batch ferromagnetic materials.

The invention discloses a grinding device and a magnetic grinding disk kit for finish machining of the rolling surfaces of ferromagnetic-material convexity cylindrical rollers. The grinding device comprises a main machine, the magnetic grinding disk kit and a roller circulating disk external system. The main machine comprises a base, stand columns, a cross beam, a sliding table, an upper tray, a lower tray, axial loading devices and a main shaft device. The roller circulating disk external system comprises a roller collecting device, a demagnetizing device, a conveying system, a sorting mechanism and a feed-in mechanism. The magnetic grinding disk kit comprises a pair of coaxial first and second grinding disks, and the front sides of the first grinding disk and the second grinding disk areoppositely arranged. The front side of the first grinding disk comprises a group of inside-sunken arc line grooves radially distributed on a first grinding disk base face (inside-sunken arc rotatingface); and the front side of the second grinding disk comprises one or more spiral grooves distributed on a second grinding disk base face (outside-protruding arc rotating face), and an annular magnetic structure is embedded in a base body of the second grinding disk. The grinding device has the capacity for finish machining of the rolling surfaces of the ferromagnetic-material convexity cylindrical rollers on a large scale.

The invention provides a laser-based three-dimensional positioning and guiding device for a root canal therapy dental pulp opening passage. The device comprises a tooth surface positioning assembly and a dental pulp opening guiding assembly, wherein the tooth surface positioning assembly is arranged on a dentition; the dental pulp opening guiding assembly is arranged on the tooth surface positioning assembly; the tooth surface positioning assembly comprises a positioning shell, an inner clamping ring piece and an outer clamping ring piece; a positioning guide hole is formed in the positioningshell; the outer clamping ring piece is arranged at the positioning guide hole of the positioning shell; the inner clamping ring piece is movably connected with the outer clamping ring piece; and thedental pulp opening guiding assembly comprises an X-direction support frame, a Y-direction support frame, an X-direction laser emitter and a Y-direction laser emitter. The device indicates the dentalpulp opening passage through laser, and the effect is intuitive and visual, so that the operation is controllable, and the device is simple and convenient to operate and easy to master. The device canguide more accurate dental pulp opening, the hard tissues of teeth are less removed, and the resistance and functionality of the affected teeth are preserved to the greatest extent, so that the service life of the teeth in the oral cavity is prolonged.