298results about How to "Improve milling efficiency" patented technology

The technical field of the invention belongs to concrete and cement. The invention relates to a sialite binary wet cement and its package, transportation, storage and application. The sialite binary wet cement is composed of a “female body” as a primary component and a “male body” as a secondary component both of which are produced, stored, and transported separately, and are mixed together when they are used, wherein the “female body” and the “male body” each have a specific surface area of 2800-7500 cm2 / g, the “female body” is mainly composed of inorganic cementitious materials and water, and it is in slurry, paste or wet powder form during the whole period of its production, storage, transportation and usage; the “male body” is mainly composed of inorganic cementitious materials, and it can be a wet form or a dry powder form. When they are used, the “female body” and the “male body” are mixed together with a small amount of regulating agents. There is no generation of dust, SO2, NOx and CO2 during production and application of the sialite binary wet cement. Therefore heavy pollution of a traditional cement industry is avoided, and energy consumption and cost of product are decreased. The starting materials of the said cement mainly come from natural mineral, various slag and cinder. The said cement can be used for building, traffic, water conservancy, nine filling, timbering, and solidation of roadbed.

A powder metal cladding nozzle which is coaxially attached to a laser processing head that irradiates a process portion (W) with a laser beam (L) and that discharges powder metal (P) to a laser beam irradiation portion in the process portion (W). The powder metal cladding nozzle includes a body portion (2) that has a ring-shaped powder metal holding space (7) in which the powder metal (P) is held; and a nozzle portion (3) that is connected to the body portion (2) and that has plural discharge passages (18) which are communicated with the powder metal holding space (7) and which open at an outlet (19) for discharging the powder metal (P). The powder metal holding space (7) is formed in the body portion (2) and is divided into plural powder metal holding regions corresponding to plural supply passages (10) that open into the powder metal holding space (7) and that supply the powder metal (P) to the powder metal holding space (7).

The invention discloses a machining method of a thin-wall honeycomb core material curve machining molded surface, and aims to provide a honeycomb machining method with high milling efficiency and capable of prolonging the life of a special honeycomb combined milling tool. The machining method is realized through the following technical scheme: when a double sided tape fixing state at the earlier stage of honeycomb machining is good, the special honeycomb combined milling tool with a conical disc return milling tool is changed for cutting; the rotating direction of the special honeycomb combined milling tool is changed; the conical disc return milling tool for feeding by a wedged angle of 30-45 degrees through high-speed rotation is used for cutting roughing; according to an anticlockwise tool rotating mode in the tool rotating direction, the downward pressure is applied to a honeycomb thin-edge area (1) through anticlockwise rotation; the part, easy to be pulled and damaged, of the thinnest honeycomb edge of the honeycomb bottom cutting profile is firstly machined; and after the honeycomb thin-edge area (1) of a NOMEX honeycomb part blank is machined, the sequential gradient machining is performed in (2-6) thickness direction of the thick-edge area cutting profile layer by layer, and the other parts are machined.

An undergarment with powder dispenser and method of use. A powder dispenser is attached to an undergarment torso rear. Powder is placed within the powder dispenser and diffuses through a powder-permeable powder dispenser front wall onto the skin of a user wearing the undergarment with powder dispenser. The powder dispenser extends downwards from an undergarment torso waist substantially 80% of the way to an undergarment crotch. A powder dispenser rear wall top edge elastic keeps powder within the powder dispenser from escaping. Downwardly-sloping powder dispenser baffles extend alternatingly from powder dispenser rear wall side edges, creating a serpentine powder path to improve powder distribution. Method of use steps include inserting anti-chaffing powder through a powder dispenser mouth and into a powder dispenser reservoir, and then allowing it to diffuse through the powder dispenser front wall onto the wearer, thus helping avoid skin irritation in the buttock, crotch, and thigh areas.

The invention belongs to the technical field of preparing and processing of titanium and a titanium alloy, and particularly relates to a method for manufacturing titanium and titanium alloy and part thereof by taking hydrogenated sponge titanium as a raw material. The method comprises the following steps: hydrogenating sponge titanium; synchronously ball-milling to prepare hydrogenated titanium powder or mixed powder; pressing the powder; quickly sintering and synchronously dehydrogenizing; thermally mechanically solidifying or forming; performing complete vacuum dehydrogenizing; and obtainingan alloy product. The method realizes synchronously ball-milling to prepare mixed powder from hydrogenated sponge titanium and alloying raw materials, and the powder does not need to screen, so thatthe powder yield is greater than 96%; and under protection of inert atmosphere, pressing, quick heating and alloying, thermal mechanical solidifying and forming are completed. The method is short in process flow, is high in efficiency, can prepare the titanium and the titanium product with high compaction (greater than or equal to 99.8%) and low oxygen content (lower than or equal to 0.26%); mainmechanical properties of the alloy are higher than level of common deformed titanium alloy; and cost is obviously lower than that of conventional powder metallurgical titanium alloy.

The invention provides a clamp structure used for parallel face milling of a glass mold, and belongs to the technical field of tool clamps used for manufacture of the glass mold. The clamp structure comprises a bottom plate, a base, a first action cylinder, a second action cylinder, and a movable bearing base. The base is fixed on the upward side of the bottom plate, a connection shaft plate connecting base is formed on the upper portion of one end of the base, a fixed bearing base is fixed on the upper portion of the other end of the base, and a glass mold base plate is fixed in the middle of the base. The first action cylinder and the second action cylinder are located on two sides of the base respectively and fixed on the base. The upper portion of the movable bearing base corresponds to the fixed bearing base, the middle of the movable bearing base is connected with the connection shaft plate connecting base, one end of the lower portion of the movable bearing base is connected with the first action cylinder, the other end of the lower portion of the movable bearing base is connected with the second action cylinder, the upper portion of the movable bearing base corresponds to the upper portion of one end of the glass mold base plate in a vacant state, and the fixed bearing base faces one end of the movable bearing base and corresponds to the upper portion of the other end of the glass mold base plate. Milling efficiency is high, industrialization widened production requirements are met, operation intensity of workers is reduced, the parallelism of parallel faces of the glass mold can be guaranteed, and energy-saving effects are ideal.

A plasma atomizing powdering device applicable to a high-melting-point metal comprises a material conveying device, a vertical melting chamber, an atomizing chamber, a powder collecting device, a vacuum pumping system and a cooling gas supplying and conveying device, wherein the feeding end of a flow guide pipe communicates with a liquid draining hole in the bottom part of the melting furnace, andthe discharging end of the flow guide pipe is positioned in the atomizing chamber and is right above a collecting area of plasmas which are injected through a plasma torch assembly; a heating and heat preserving device is arranged at the outside of the flow guide pipe; and a blocking rod for blocking the liquid draining hole and a lifting driving device for driving the blocking rod to ascend anddescend are arranged in a vertical melting barrel body. The plasma atomizing powdering device applicable to the high-melting-point metal is simple in structure, capable of heating and preserving the heat of molten metal in high-melting-point metal atomizing powdering, and high in powdering efficiency; a cooling assembly is capable of efficiently cooling plasma atomized droplets, so that the uniformity and stability of the metal atomizing powder are improved; the metal atomizing powder can be micronized into nanometer powder; and the micronized metal powder can be efficiently separated througha high-speed turbine separator.

A powder metal cladding nozzle which is coaxially attached to a laser processing head that irradiates a process portion (W) with a laser beam (L) and that discharges powder metal (P) to a laser beam irradiation portion in the process portion (W). The powder metal cladding nozzle includes a body portion (2) that has a ring-shaped powder metal holding space (7) in which the powder metal (P) is held; and a nozzle portion (3) that is connected to the body portion (2) and that has plural discharge passages (18) which are communicated with the powder metal holding space (7) and which open at an outlet (19) for discharging the powder metal (P). The powder metal holding space (7) is formed in the body portion (2) and is divided into plural powder metal holding regions corresponding to plural supply passages (10) that open into the powder metal holding space (7) and that supply the powder metal (P) to the powder metal holding space (7).

The invention discloses an active control method of milling chatter vibration based on an electric spindle of a magnetic suspension bearing. The method comprises the following steps: collecting a current displacement signal generated when the electric spindle has the milling chatter vibration; obtaining a state vector Q(t) formed by the displacement of the electric spindle and the speed; obtaining harmonic displacement which is shown as the formula in the description according to the electric spindle displacement [Fx Fy]T and a trigonometric function column vector phi(t); obtaining a first self-adaptive weight coefficient which is shown as the formula in the description and a second self-adaptive weight coefficient which is shown as the formula in the description; obtaining a first self-adaptive rate K1 and a second self-adaptive rate K2 according to the harmonic displacement h(t), the first self-adaptive weight coefficient lambda1 and a second self-adaptive weight coefficient lambda2; obtaining self-adaptive control current which is shown as the formula in the description according to the first self-adaptive rate K1, the second self-adaptive rate K2 and the harmonic displacement h(t); and applying the self-adaptive control current Qc(t) on a radial magnetic suspension bearing and generating corresponding magnetic field force so as to restrain the chatter vibration of the spindle. Through the active control method, the chatter vibration in the milling process is eliminated, thereby ensuring the processing quality and improving the processing efficiency.

The present invention relates to RE alloy crusher and is one rotary hydrogen crushing furnace. It includes rotary furnace, electric heater outside the furnace, furnace rotating drive mechanism and furnace vacuum pumping and hydrogen filling unit. The furnace has feeding and discharging port at one end and is connected to vacuum pumping and hydrogen filling unit at the other end. The electric heater consists of right and left bodies on the support with rollers. Inside the furnace, there are spiral sheets. Compared with available hydrogen crushing furnace with internal heater structure, the present invention with outer heater structure has fast temperature decreasing speed of the furnace and material inside it, simplified operation, high efficiency, improved safety and operation performance.

The invention discloses a preparation method of refractory high-entropy alloy powder. The preparation method comprises the following steps: firstly, preparing a refractory high-entropy alloy cast ingot from 3-7 refractory metal elements and 0-3 light elements by using a vacuum melting method; pulverizing by using a mechanical crushing method; and finally, obtaining the spherical refractory high-entropy alloy powder with the required particle size through a plasma spheroidizing method, wherein the particle size of the powder is 10-200 microns. According to the preparation method, the small-size refractory high-entropy alloy cast ingot can be processed into powder, the process steps are simple, the powder preparation efficiency is high, powder preparation of the high-melting-point alloy can be achieved, and a refractory high-entropy alloy bar does not need to be prepared. The prepared high-entropy alloy powder is controllable in particle size, uniform in component and high in production efficiency.

The invention discloses a feature library-based complex curved surface part mechanical arm machining system and method and belongs to the new technical field of complex curved surface part mechanicalarm milling machining. The system includes a feature database, a technique planning and feature matching module, a code conversion interface, an information processing module, a machining simulation module, and an actual machining module. The method includes the following steps that: the features of a complex curved surface part are analyzed and extracted, information similar to the features is obtained from the feature database by means of matching, a machining technique flow is formulated, and corresponding machining technique parameters are set; digital simulation analysis is performed on the machining process of the complex curved surface part to be machined; and mechanical arm milling machining is performed on the complex curved surface part to be machined through the actual machiningmodule. According to the system and method of the invention, a mechanical arm is utilized to directly perform milling machining on the complex curved surface part; a complete and universal complex curved surface milling matching technique flow and data link are established, and the efficient machining of the complex curved surface part can be realized.

The invention relates to an NdFeB magnet sintering method, and belongs to the technical field of rare earth magnetic materials. The method comprises the following steps that NdFeB preparing materials are weighed and are subjected to vacuum melting to obtain throwing sheets; cleaning is carried out, NdFeB recovery waste materials are obtained, the throwing sheets and the recovery waste materials are respectively subjected to hydrogen crushing to obtain preparing material coarse powder and recovery waste material coarse powder; the recovery waste material coarse powder is subjected to airflow milling powder preparation to be made into recovery waste material fine powder with the average granularity being 20 to 100mum, and the recovery waste material fine powder is mixed with the preparing material coarse powder according to a ratio being (2 percent to 50 percent) and (50 percent to 98 percent); the mixed materials are subjected to secondary airflow milling to be made into NdFeB micro powder with the average granularity being 2 to 4mum; the micro powder is pressed, formed and pressurized to obtain a blank; the sintering aging processing is carried out, and a NdFeB magnet is obtained. The NdFeB magnet sintering method has the advantages that the powder preparing efficiency is high, the rare earth loss is little, the time of the preparing method is short, and the production cost is low.

The invention provides an optical module part machining numerical control milling machine, and relates to the technical field of machining. The optical module part machining numerical control millingmachine comprises a box, one side in a water collecting tank is fixedly connected with a first workbench, the other side in the water collecting tank is fixedly connected with a second workbench, thebottom of a first bearing block is rotationally connected with the top end of a rotating shaft, and the bottom end of the rotating shaft penetrates through the bottom of a third shell, extends downwards and is fixedly connected with a knife rest. A milling cutter is arranged at the bottom of the knife rest, one side of the knife rest is in threaded connection with a fastening screw. Milling is carried out on the first workbench and the second workbench alternately, the time for clamping workpieces is saved, and the milling efficiency is greatly improved. Besides, waste is washed away by spraying cutting liquid, so that attractiveness and normal production and machining can be prevented from being influenced by the waste. Moreover, the cutting liquid and the waste are recycled through the water collecting tank, a recycling cavity and a collection box, so that the production cost can be greatly reduced, and the milling machine is worthy of vigorous popularization.

A method preparing ultrafine copper powder through using copper finished ore directly puts the copper finished ore into high-energy stirring mill and pre-treats it chemically with mechanical force and, activates the copper finished ore and pulls-off drugs. It puts the treated copper finished ore into anodic pool of diaphragm electrolytic cells and dips into electrolytic solution added dispelser, the diaphragm electrolytic cell is in ultrasonic field, energizes DC between the anode and cathode pole; the copper dipped out by the anode reaction is decoded on the cathodic pole in the way of super-fine powder on the function of ultrasonic field, then collects super-fine copper powder. The present invention uses copper finished ore as raw material, activates and pre-treats the copper finished ore mechanically to activating and pulling-off drugs of it, then prepares the copper finished ore into ultrafine copper powder directly through hypersonic film electrolyzation, realizes the finish of metal extraction, copper powder preparation, powder body dispersion and surface modifying in one device and one time, shorten the metallurgical and materials processing process, it has characteristics of short process and simple technology.

The invention discloses a ball milling process and device for iron-based alloy powder. The iron-based alloy powder contains more than 80% iron. It includes a wet ball mill and a centrifuge (19). The wet ball mill includes a motor, a speed change device (1), The vertical mill cylinder (2), the vertical stirring shaft (3), the machine body (4) and the slurry pump (5) are subjected to circular ball milling and centrifugal drying to obtain iron-based alloy powder. The beneficial effects of the present invention are: high degree of automation, easy operation, changing the way of discharging, reducing manual operation, shortening the feeding and discharging cycle by 30-50 minutes, increasing the shift output by 20-50%; the milling efficiency is higher by 2 -5 times, the one-time yield is as high as 70%, and the device can run continuously for more than 96 hours, reducing noise and ball mill power consumption, and there is almost no dust in the operation room, reducing power consumption by 60-80%, thereby greatly reducing production cost.

The invention discloses a device for preparing metal spherical powder by utilizing a metal wire material. The device comprises a powder making kettle, a plasma torch, a nozzle, a wire feeder and a powder containing pot, wherein the front end of plasma torch is inserted into the powder making kettle, the nozzle is arranged at the front end of the plasma torch, an air inlet hole is formed in the nozzle in the axial direction, the wire feeder is provided with a wire feeding joint, furthermore, the metal wire material is conveyed to the front end of the nozzle through the wire feeding joint, and the powder containing pot is arranged at the bottom of the powder making kettle and is used for collecting spherical metal powder generated in the powder making kettle. The invention further disclosesa method for preparing the metal spherical powder by utilizing the metal wire material. The method is characterized in that the transition arc plasma torch is adopted to prepare the spherical metal powder by utilizing the metal wire material, and relatively good preparation effects are obtained through adjustment of relevant parameters including the argon flow, the transfer arc current, the wire feeding speed and the like in the preparation process. According to the device and method for preparing the metal spherical powder by utilizing the metal wire material, the spherical powder with the relatively small grain diameter can be obtained in a high-efficiency manner, the obtained metal powder has relative few hollow spheres, and the spherical degree is high.

The invention relates to a nano-magnesium-based composite hydrogen storage material and a preparation method thereof. The material comprises a main component of magnesium, and simultaneously comprisesa plurality of catalysts of mixed rare earth, carbonyl nickel powder and graphite so as to improve the low-temperature hydrogen absorption performance of the material. The material has a nanocrystalstructure, the grain size is 20-50 nanometer, and the material has excellent low-temperature hydrogen absorption dynamics performance. The preparation method comprises the following steps of firstly,carrying out vacuum smelting on pure magnesium and a certain amount of mixed rare earth by adopting a vacuum induction melting method to prepare a brittle magnesium-rare earth alloy ingot with magnesium doped with rare earth elements in situ; and then mixing the obtained alloy with carbonyl nickel powder, graphite powder and inert organic grinding aid, and further preparing a high-capacity magnesium-based composite hydrogen storage material through a mechanical ball milling method. The preparation method of the material overcomes a wall sticking phenomenon in a mechanical ball milling processof the magnesium-based hydrogen storage alloy, so that the material recovery rate is improved, and the high-capacity magnesium-based composite hydrogen storage material with excellent low-temperaturehydrogen absorption performance is obtained.

The invention discloses a crawler type rice mill. The crawler type rice mill comprises a hopper, a discharging barrel, a rack and a conveying mechanism, wherein rice knives are mounted on the rack, the conveying mechanism comprises a driving wheel, a driven wheel and a conveyor belt matched with the driving wheel and the driven wheel, the hopper is communicated with one end of a rice milling channel through a feeding opening, the discharging barrel is communicated with the other end of the rice milling channel, a plurality of milling strips are mounted on the conveyor belt, the milling strips are transversely and densely arranged on the conveyor belt, the rice milling channel is formed between the milling strips and the rice knives, the sides, opposite to the rice knives, of the milling strips are milling surfaces, and clearances allowing rice grains to rotate are arranged between the adjacent rice knives. The crawler type rice mill is high in milling efficiency, low in electricity consumption, high in rate of remained germs and low in rice crushing rate, and is durable.

The invention relates to a preparation device and a preparation method of metal powder. The preparation device comprises an atomization tank, a liquid guide pipe, an ultrasonic atomizer, an energy device of the ultrasonic atomizer, a rotary liquid distributor and a power device of the rotary liquid distributor, wherein the liquid guide pipe, the ultrasonic atomizer, the energy device of the ultrasonic atomizer, the rotary liquid distributor and the power device of the rotary liquid distributor are positioned in the atomization tank, the liquid guide pipe and the rotary liquid distributor are coaxially arranged, so that metal melt is conveyed to the rotary liquid distributor through the liquid guide pipe, the rotary liquid distributor and the ultrasonic atomizer are coaxially arranged and are close to each other, so that the metal melt is centrifugally dispersed to the surface of the ultrasonic atomizer through the rotary liquid distributor to form a metal film. The preparation method of the metal powder specifically relates to a preparation process through the device. According to the preparation device and the preparation method of the metal powder, the melt can be rapidly and uniformly distributed through centrifugal atomization, the metal powder of a high degree of sphericity and micro surface roundness is prepared by combining the ultrasonic atomization technology, the problems that the centrifugal atomizing on special-shaped powder is poor in powder surface, and the ultrasonic atomization preparation is low in efficiency and low in productivity are solved, and the purpose of preparing the spherical metal powder by ultrasonic and centrifugal composite atomization is achieved.

The invention provides a plastic tube milling crushing machine, comprising a rack, a feeding mechanism, a tube stabilizing mechanism, a crushing platform and a quakeproof mechanism, wherein the feeding mechanism is used for clamping a plastic tube and pushing the plastic tube to the tube stabilizing mechanism; and the tube stabilizing mechanism can stably clamp the plastic tube and also can position the plastic tube in the center of four groups of milling fly cutters of the crushing platform for milling. The plastic tube milling crushing machine disclosed by the invention is additionally provided with the feeding mechanism, the tube stabilizing mechanism and the quakeproof mechanism so that the whole milling process is relatively stable and has small noises; meanwhile, the crushing platform utilizes the four tower-shaped fly cutters to mill at the same time and milled grains are smaller, relatively uniform and relatively easy to cut and discharge; and the milling is relatively smooth and the milling efficiency is relatively high. The plastic tube milling crushing machine disclosed by the invention can crush a PE long tube with the diameter of 800mm and the thickness of 70mm; the output can reach to 16 tons within 8 hours and the total power is 16kw; the noises in a crushing process are extremely reduced and milled grains can reach to prismatic small square blocks with the size of 6*5*4; and the grains have uniform size, do not need to be granulated and can be directly used after being agitated.

The invention belongs to the technical field of process equipment, and relates to a flexible clamp platform used for milling of a gantry type five-coordinate metal plate numerical control milling machine. The device comprises a fixed type base, a high-precision tool setting datum hole, longitudinal sliding rods, longitudinal sliding rails, a suction cup base, a supporting rod support, a supportingrod, a vacuum suction cup and transverse sliding rail grooves; the fixed type base is placed on a five-coordinate machine tool platform, two transverse sliding rail grooves with size graduated linesand the multiple longitudinal sliding rods with the size graduated lines are arranged, the longitudinal siding rods are arranged on the transverse sliding rail grooves, the longitudinal sliding railsare arranged on the longitudinal sliding rods, the suction cup base is arranged on the longitudinal sliding rails, the bottom end of the supporting rod support is in screw joint to the suction cup base, the supporting rod is screwed into a thread through hole of the supporting rod support, and can vertically move up and down, and the vacuum suction cup is fixed to the top end of the supporting rod, and can swing at any angle in a 360-degree manner to be fixed and is used for tightly absorbing the part to be milled. The platform is wide in application range, and rapid in positioning, and the milling precision is not lower than that of an electric transmission automatic flexible clamp imported from abroad.

The invention provides an integrated induction melting gas atomization powder manufacturing device and a gas atomization powder manufacturing method. The integrated induction melting gas atomization powder manufacturing device comprises a gas atomization powder manufacturing device body. The gas atomization powder manufacturing device body comprises a supporting frame and a gas atomization crucible. A quarts tube used for collecting alloy powder is arranged on the supporting frame. One end of the quarts tube is connected with an alundum tube in which protective gas is led. The supporting frame is provided with an induction coil, and the gas atomization crucible is arranged in the induction coil. A nozzle is arranged at the bottom of the gas atomization crucible and faces the interior of the quarts tube. The axis of the nozzle of the gas atomization crucible is perpendicular to the axis of the quarts tube. An opening of the alundum tube faces the position of an outlet of the nozzle, and the opening end of the quarts tube is sealed through a stopper. The integrated induction melting gas atomization powder manufacturing device is simple in structure, small in occupied area and easy to assemble, the phenomenon that liquid blocks the nozzle cannot happen in the powder manufacturing process, meanwhile, the gas leading flow can be changed, and therefore the particle size distribution ratio of powder manufacturing is changed.

The invention relates to a milling method of a diffuser. The milling method comprises the following steps: a. with a route from an outlet blade-less section to an inlet blade-less section between two adjacent blades as a first milling route, roughly milling the blades in a layering manner according to the first milling route, and sequentially milling the outlet blade-less sections and the inlet blade-less sections between every two adjacent blades; and b. with a route at the periphery of the blades as a second milling route, milling the margins of the blades in one step according to the second milling route, thus sequentially milling all the blades. By adopting the milling method, the milling quality and milling efficiency of the diffuser can be improved.

This invention relates to a rubber composition capable of improving a steering stability on a wet road and a low fuel consumption of a tire, and more particularly to a rubber composition comprising 5 to 60 parts by mass of a low-molecular weight aromatic vinyl compound-conjugated diene compound copolymer (B) having an aromatic vinyl compound content of 5 to 80% by mass, a vinyl bond content in a conjugated diene compound portion of 10 to 80% by mass and a weight average molecular weight as measured through a gel permeation chromatography and converted to polystyrene of 5,000 to 200,000 and 20 to 90 parts by mass of a filler (C) based on 100 parts by mass of a rubber component (A) composed of at least one of natural rubber and synthetic diene-based rubbers, in which 50 to 90% by mass of the filler (C) is silica.

The invention relates to a composite sealing assembly, a powder manufacturing device and a powder manufacturing method, and relates to the technical field of powder manufacturing. The composite sealing assembly comprises a V-shaped sealing ring, a fixed plate, a movable plate, a flange, a V-shaped cushion block and a locking nut, wherein a cavity is formed in the fixed plate, and the movable platecapable of moving up and down is arranged in the cavity; the fixed plate is fixedly connected with the flange; the V-shaped sealing ring is arranged on the inner side of the flange; the outer side face of the flange is connected with the locking nut; and the V-shaped cushion block is arranged between the V-shaped sealing ring and the locking nut. The powder manufacturing device comprises a feeding platform, a rotary driving device and an atomization chamber, and the composite sealing assembly is arranged at an opening of the atomization chamber. The powder manufacturing method comprises the steps that an electrode bar penetrates through the composite sealing assembly, powder is manufactured, and the electrode bar exits from the composite sealing assembly. The V-shaped sealing ring of thecomposite sealing assembly can be used for tightly sealing the electrode bar and the like firstly, the movable plate is used for sealing the electrode bar and the like again, air leakage of the atomization chamber is prevented, the sealing effect is improved, and the production efficiency is improved.

The invention provides a horizontal milling machine with an ultrahigh processing speed, comprising a base, a first electric spindle used for mounting a milling cutter, a first electric spindle reciprocating platform, a second electric spindle used for clamping a workpiece and a working platform reciprocating platform, wherein the base is fixed with two parallel X axial linear guide rails and two parallel Y axial linear guide rails, the base is provided with an X axial feeding mechanism and a Y axial feeding mechanism; the first electric spindle reciprocating platform is provided with a first electric spindle lifting device, and the first electric spindle is connected onto the lifting device; the first electric spindle reciprocating platform is arranged on the two parallel X axial linear guide rails and is connected with the X axial feeding mechanism; the working platform reciprocating platform is arranged on the two parallel Y axial linear guide rails and is connected with the Y axial feeding mechanism, and the second electric spindle is arranged on the working platform reciprocating platform. The horizontal milling machine with an ultrahigh processing speed provided by the invention has the advantages of high milling efficiency, compact structure, light weight, low noise, small vibration, easiness in manufacturing and the like.

The invention discloses a power station boiler low-NOx cofiring system coupling semicoke and sludge blending combustion. The problems that the semicoke calorific value is high, but the ignition and burnout performance is poor, the NOx exhaust is large, the sludge water content is high, and the calorific value is low are solved. The system comprises a coal pulverizing system, a preheating system, asludge drying system, a burnout air nozzle and the like. By means of the characteristics that the sludge calorific value is low and the semicoke calorific value is high, the semicoke and the sludge are coupled. The system comprehensively considers optimization of the coal pulverizing system, multi-stage sludge drying, multi-stage utilization of smoke heat, semicoke and sludge mixed fuel preheating, utilization of air separation system cold energy, hearth partition combustion, burnout air arrangement, primary air and secondary air oxygenation treatment, and the coal-fired power plant boiler blending combustion semicoke and sludge low-NOx cofiring method is put forwards. Due to semicoke and sludge pretreatment and reasonable organized combustion, combustion stability inside a hearth is improved, NOx exhaust is reduced, and efficient and clean utilization of semicoke and large-scale harmless sludge disposal are achieved.

The invention relates to an adaptive adjustment method of spindle rotation speed for chatter-free high-efficiency milling. Firstly an adaptive adjustment system of spindle rotation speed for chatter milling is built; in the milling process of a machine tool, the vibration acceleration data of a spindle head is acquired, extracted and spliced dynamically, frequency domain transformation calculationis carried out on the spliced vibration acceleration data to obtain an energy spectrum of the spindle head, and the milling chatter is judged by comparing the energy spectrum characteristic frequencyenergy ratio with a threshold value; in the milling chatter state, in combination with the quantization relationship between the natural frequency of a cutter system and the optimal rotation speed ofthe stability domain, the spindle rotation speed is adaptively and directionally adjusted, the feed rate is changed synchronously, and the active suppression of the milling chatter is realized; and in the milling chatter-free state, the spindle rotation speed is adjusted adaptively, synergistically and directionally by gradually increasing the spindle rotation speed in a determined range, and themilling machining efficiency is improved. The method is simple and convenient to implement and convenient to use in the enterprise processing site.