98results about How to "Reduce surface roughness value" patented technology

The invention discloses a method for producing a voltage-bearing aluminum alloy tank body of an ultra-high voltage switch by a V-process, comprising the following steps: model making, thin film heating, thin film shaping (film absorbing), coating spraying, sandbox placing, ram-jolting by adding sand , back film covering, film loosening, core setting, box folding, pouring, removing box and shaking out. After the process is improved, an intermediate frequency furnace is utilized to melt and a crucible heat preserving furnace is utilized to modify and refine. When melting in the intermediate frequency furnace, microelements such as tombarthite and the like are replenished and a new non-stirring melting and refining technology is adopted so as to reduce oxide inclusion content in alloy liquid. Modification and refining treatment in the crucible heat preserving furnace ensures high purity degree and high component precision of aluminum liquid, and using pure aluminum alloy liquid can increase the ratio of acquiring qualified pressure-proof tank body foundry products.

A laser blasting apparatus for shaping on the surface of medium-thick plate is composed of laser device, optical guide system, laser blasting head, fixture system for workpiece, and control system. Its shaping process includes computer simulation of the stress field distribution according to the curved surface shape to be processed, optimizing it to obtain the distribution of shock wave pressure and blasting tracing on the surface of plate, automatically choosing the parameters of laser pulse optical beam converte and optical mask, writing control program, generating strong short laser pulses, covering them to several pulse clusters, passing through optical mask, acting on energy converting body on the surface of workpiece to obtain shock waves, acting on the surface of workpiece for shaping.

The invention relates to a method and a device for intensifying controlled laser shot peening, first of all, a fatigue analysis model is established in a fatigue analysis software, distribution of residual stress in the accessories is optimized in light of the expectant fatigue life value after the intensification to obtain the distribution of residual stress which meets the demand; the distribution of residual stress is imported into a structural mechanics CAE analysis software to obtain by optimization laser shock wave pressure acting on the surface of a sheet metal and the shot peening track; after than a computer control system automatically selects the pulse parameter and a light beam changing device while the laser shot peening; the laser emits a high energy short pulse laser beam to be converted into the high amplitude shock wave pressure acting on the surface of the accessories after being subjected to an optical changing device and an optical mask; a measurement feedback system is used to online check the distribution situation of the stress and strain on the surface layer of the accessories in the laser shot peening, the special computer software module is utilized to perform error analysis and parameter correction, ensuring to generate the expectant distribution of residual stress on the surface layer of the accessories to meet the intensification demand of the anti-fatigue performance.

The present invention discloses a method for producing a gradient nanometer structure on the martensitic steel surface, and belongs to the technical field of metal material surface nanocrystallization. According to the method, a martensitic steel rotation member is treated by using a surface mechanical rolling processing technology (SMGT), the SMGT processing cutter hard ball capable of freely rolling performs high speed rolling and pressing on the martensitic steel rotation member surface, the martensitic steel surface to be treated is subjected to high speed plasticity deformation, and under the conditions of high strain, high strain rate and high strain gradient, the coarse grain structure on the surface layer is converted into the gradient structure sequentially comprising nano-grains, submicron grains and micro-scale grains. According to the present invention, the surface roughness Ra value of the martensitic steel being subjected to the SMGT surface nanocrystallization treatment is less than 0.30 [mu]m, and the surface property is significantly improved.

The invention relates to long round pipe inner surface processing equipment and a process thereof, belonging to the technical field of special processing. The invention is characterized in that a rotary magnetic field produced by a stator type magnetic field generator and a rotor honing head in the inner cavity of a round pipe workpiece form magnetic action, the rotor honing head rotates and moves along with the rotary magnetic field under the magnetic action, so that the rotor honing head and static workpiece move relatively in non-mechanical driving way, rough machining and finish machiningof round pipe inner surface can be realized by adopting different rotor honing heads, and especially efficiency is high and processing effect is good in processing of the inner hole surface of a round pipe part with higher length and larger diameter. The invention has the advantages that rough machining and finish machining of inner hole surface of round pipe part with higher length and larger diameter are realized, the problem that inner surface processing of long round pipe which is not suitable to high speed rotation is difficult owning to part structure particularity in actual production can be completely and effectively solved, equipment has simple structure and low cost, and the technology has higher application value.

The invention relates to a numerical control machining method for a thin-wall copper electrode, which comprises the following steps of: reasonably selecting a clamp, a cutter and a cutting parameter for improving the working efficiency; reasonably distributing the step and a feed route; controlling the deformation of a workpiece; after rough machining is finished, mounting a residual stress release notch at the side surface of the workpiece; eliminating deformation caused by residual stress during rapid rough machining, wherein a rough machining cutter adopts a ball end milling cutter instead of a generally used flat end vertical milling cutter; and carrying out symmetrical machining on the design of the feed route. The method for machining the workpiece sequentially comprises the steps of machining a reference surface 5 and a reference surface 4, clamping for positioning, roughly machining, machining a reference surface 2 and a reference surface 3, machining a stress release notch 9, finely machining and detecting precision. By adopting a plurality of process measures for controlling deformation, the invention has the advantages of greatly reducing the deformation of machining parts and effectively improving the precision and the stability of the parts. By actually measuring the workpiece on a three-coordinate measuring machine, a surface roughness value can be reduced to minimum and can completely meet the requirement on products.

The invention relates to a deep hole machining device, in particular to an ultrasonic vibration assisted deep hole machining device. The ultrasonic vibration assisted deep hole machining device solves the technical problems that a tool is abraded severely, the surface quality is poor, and an oil supply device supplies oil inconveniently during the existing deep hole machining. The ultrasonic vibration assisted deep hole machining device comprises a drilling rod internally provided with a hollow structure, a connecting handle internally provided with a cavity, and an integrated amplitude transformer internally provided with a transducer, wherein one end of the connecting handle is opened; a cavity penetrating front and back is arranged in the center of the integrated amplitude transformer; the middle rear part of the integrated amplitude transformer is located in the cavity of the connecting handle and fixedly connected with the connecting handle; the front end of the integrated amplitude transformer is fixedly connected with the rear end of the drilling rod; and the cavity of the drilling rod is communicated with the cavity of the integrated amplitude transformer. The device applies ultrasonic vibration machining into deep hole machining of a gun drill, can effectively reduce a cutting force and cutting temperature and prolong the service life of the tool, reduces the surface roughness, and improves the machining precision.

The invention provides a metal surface modification method through emulsion jet, belonging to the processing technology of metal material surface. The metal surface modification method mainly comprises the following steps: preparing an emulsion which can produce effective cavitation bubbles and jet effect; immersing a component to be processed in the emulsion; adjusting a jet nozzle, a jet pressure and a distance between the jet nozzle and the processed metal; carrying out jet processing on the metal surface in the emulsion medium; taking the emulsion as a medium for producing cavitation jet; and forming the metal surface modification method through emulsion jet, thus improving fatigue strength of a test piece by 56% and 11% respectively. The metal surface modification method through emulsion jet of the invention has the advantages of generating the effective cavitation bubbles and improving processing efficiency of the metal surface, generating no corrosion for the metal surface, polluting no environment, having low cost, being not easy to damage the metal surface, having low investment cost and use cost, good use effects and being easy to be promoted and applied; in addition, residual emulsion does not corrode the metal surface.

The invention discloses a high-accuracy surface fine machining and finish machining method for thin-wall wheel discs. The rotary shaft type vibrating finish machining process is adopted for machining the surfaces of the wheel discs. The method specifically comprises the machining steps of (1), protecting the labyrinth parts of the wheel discs through black tape before machining, wherein the height of abrasive material is higher than the total height of the wheel discs and a clamp by more than 100 mm; (2), clamping the wheel discs on the clamp, installing the clamp on a pneumatic chuck of a machine tool, starting the machine tool and carrying out trial vibration; (3), carrying out vibrating finish machining on the surfaces of the sides A of the wheel discs and then carrying out forward vibration for 30 minutes and reverse vibration for 30 minutes; (4), halting the machine tool, clamping the wheel discs again, carrying out vibrating finish machining on the surfaces of the sides B of the wheel discs and then carrying out forward vibration for 30 minutes and reverse vibration for 30 minutes; (5), halting the machine tool, discharging the clamp and the wheel discs and clearing redundant material on the surfaces of the wheel discs. According to the method, high-quality and efficient surface fine machining is realized.

A technology combining magnetic field with electrospark for machining the magnetically nonconductive metallic material includes such steps as designing the magnetic supply unit of electromagnet, connected to the electrode terminals of electrospark machine, debugging and installing, connecting the workpiece to be machined with the positive electrode of pulse power supply, connecting the machining tool to its negative electrode, supplying the running water as its working liquid, optimizing technological parameters, measuring the machining speed and surface roughness, and observing the chip discharging state.

The invention provides a method for determining distributed process parameters of a laser peening forming complex curved surface. The method comprises the following steps: establishing a function relationship between a deflection curved surface and an intrinsic moment based on plate shell mechanics, and establishing an optimization model based on partial differential equation constraint by takinga distributed intrinsic moment function as a design variable; according to a curved surface parameter equation or a curved surface coordinate of the workpiece, dispersing a target curved surface, selecting an appropriate optimization algorithm to solve an optimization model, and calculating a distributed natural moment; dividing into a plurality of isoparametric areas convenient for process operation according to the size of the distributed natural moment, and determining a laser peening forming scanning scheme in each area; and establishing a process database corresponding to process parameters and inherent moments through experiments, determining the experiment process parameters, and determining the optimal distributed process parameters in combination with the requirements of residualstress. The method for determining the complex curved surface forming technological parameters is established on the basis of the elastic plate shell theory, and high efficiency and precision are achieved.

The invention provides a method for high-accuracy turning of outer circles or inner holes of shaft-type workpieces on a numerical control machine tool. The method includes the following steps: first finish turning, namely, using a turning tool with the feed amount of f to perform turning on the outer circles or the inner holes of the shaft-type workpieces from the end portions of the outer circles or the inner holes and along the axial direction to enable a 'tool pattern' in the shape of a single thread to be formed on the surfaces of the outer circles or the inner holes of the shaft-type workpieces; maintaining clamping states of the shaft-type workpieces and cutting parameters of the turning tool to be unchanged, sequentially performing a plurality of times of the finish turning steps, and for Nth finish turning, returning the turning tool to an initial turning position, enabling cutting points on the end portions of the outer circles or the inner holes of the shaft-type workpieces and cutting points of initial finish turning to deviate angles in odd-numbered times of equally-divided 2(N-1) within the range of 360 degrees respectively, and performing turning on the outer circles or the inner holes along the axial direction. The method can be realized only by clamping for one time on the numerical control machine tool, ordinary standard turning tools are used for accurate control and revision of processing sizes of shaft-type parts, and better surface processing quality can be acquired.

The invention discloses a blade surface roll-polishing finishing method adopting a distributed protection measure, and belongs to the technical field of machine part surface finishing. The method is characterized in that a blade and a blade basin protection device or blade back protection device are fixed to a fixture at a certain space angle, and the fixture is connected to a spindle; in the machining process, the spindle swings around the axis of the spindle, and the blade is machined in a work bin which contains machining media such as roll-polishing blocks and polishing liquid and rotates around the axis of the work bin. By means of the method, the blade finishing efficiency and uniformity can be effectively improved, the blade root machining effect can be improved, intake and exhaust sides can be prevented from being excessively polished, deformation of the blade in the machining process can be effectively reduced, and the blade can be protected.

The invention discloses a post-carburization surface strengthening method for a low-carbon steel part; the method strengthens the surface of the low-carbon steel part that is carburized by means of existing ultrahigh-pressure digital control water jet, i.e. mixed abrasive is charged into a mixing pipe through self-gravity and negative pressure that is produced by a high-speed water flow to mix with water, and the mixed abrasive accelerated by the water flow, in conjunction with the water flow, is sprayed from a nozzle to the surface of the part at a high speed; during spraying, steel pellets of high hardness provide high impact on the surface of a workpiece, whereas glass pellets of low hardness will partly break during spraying and mix with the water flow to produce liquid grinding action on the surface of the workpiece; therefore, after being strengthened by mixed abrasive jet blasting, the workpiece surface has higher residual pressure stress than that from traditional blasting and also has small surface roughness.

A method for treating a film of material, which can be defined on a substrate, e.g., silicon. The method includes providing a substrate comprising a cleaved surface, which is characterized by a predetermined surface roughness value. The substrate also has a distribution of hydrogen bearing particles defined from the cleaved surface to a region underlying said cleaved surface. The method also includes increasing a temperature of the cleaved surface to greater than about 1,000 Degrees Celsius while maintaining the cleaved surface in an etchant bearing environment to reduce the predetermined surface roughness value by about fifty percent and greater. Preferably, the value can be reduced by about eighty or ninety percent and greater, depending upon the embodiment.

The invention relates to non-conventional processing technology and surface modification in surface treatment, in particular to a bipolar pulse electrolysis-jet current composite processing method for YG hard alloys. The method adopts neutral inorganic salt solution as electrolyte, and combines the jet current technical characteristics and scouring and polishing functions of electrolyte jet current to remove passive films and other electrolysis products on the processed surface in time so as to obtain higher processing efficiency and improve the working environment greatly. The method has the characteristics of less influence factors, comparatively simple process, low equipment cost, low disposable investment expense, safety, environmental protection and the like, organically combines electrolysis processing technology and jet current processing technology, develops novel physical and electrochemical composite processing technology, widens the application range of electrochemical processing technology, and provides technical foundation for processing other high-hardness conducting materials.

The invention discloses a micropore polishing method for an ultraprecise optical element, which includes: 1 preparing polishing liquid by means of mixing, even stirring, cooling and ageing according to a polishing liquid formula (raw materials of the formula include 350-400ml of hydrofluoric acid, 300-350ml of concentrated sulfuric acid and 50-100ml of glycerol or glycol in terms of volume ratio); 2 cleaning up the pre-polishing optical element with organic solvents mixed with acetone and then drying the pre-polishing optical element; 3 shielding positions, needing no etching and polishing, of the cleaned optical element; and 4 placing the prepared polishing liquid into a thermostat water bath at the temperature of 25-50 DEG C, soaking the optical element into the polishing liquid, stirring the polishing liquid, taking out the optical element after 20-30 minutes, firstly rinsing the optical element with 3%-7% of caustic soda solution for 3-5 minutes, then washing the optical element with pure water and finally drying the optical element. The micropore polishing method is simple in process, easy in operation and free of undercutting, production cost is reduced, production cycle is shortened, and the surface quality of micropores of the ultraprecise optical element is improved.

The invention relates to a pipe electrode high-speed rotation self-suction type reflux electrolytic machining method. A pipe electrode rotates at a high speed, the resultant force of Coriolis force and centrifugal force pumps and sucks electrolyte and an electrolysis product in electrolytic machining gaps to form reflux electrolytic machining. The pipe electrode is clamped on a motor rotating at ahigh speed, and the spindle of the motor is hollow; and when the motor rotates at a high speed, the motor drives the pipe electrode to rotate at a high speed to pump and suck electrolyte to form reflux, and the electrolyte and the electrolysis product are discharged out through an outlet in the tail end of the hollow spindle.

The invention discloses an ultrasonic combined adaptive anti-fatigue precision machining system and method of a multi-curvature curved surface, and belongs to the field of mechanical precision machining common technologies. The ultrasonic combined adaptive anti-fatigue precision machining system and method of the multi-curvature curved surface aim to solve the technical problem of how to machine acurved surface of a key part with the multi-curvature curved surface while guaranteeing that the part has the anti-fatigue performance of a part with the multi-curvature curved surface. According tothe adopted technical scheme, the ultrasonic combined adaptive anti-fatigue precision machining system structurally comprises a flexible grinding head device and a control unit. The control unit is electrically connected with and has control over the flexible grinding head device, an ultrasonic coupling agent circulation structure and an impact vibration structure. The flexible grinding head device is used for machining the multi-curvature curved surface of the part. The control unit is used for having control over the working state of the flexible grinding head device. The flexible grinding head device comprises a flexible adjustment box body, the ultrasonic coupling agent circulation structure and the impact vibration structure. The impact vibration structure is arranged in the flexibleadjustment box body. The interior of the flexible adjustment box body communicates with the ultrasonic coupling agent circulation structure. The invention further discloses the ultrasonic combined adaptive anti-fatigue precision machining method of the multi-curvature curved surface.

The invention belongs to the technical field of bearing cage processing and provides a finishing method for a 40CrNiMoA steel cage. A proposed finishing method for 40CrNiMoA steel cage. The finishing method includes polishing and brightening; brown corundum is selected as the abrasive, and brown corundum includes brown corundum oblique cylinders, brown corundum oblique triangles and brown corundum balls; the abrasive and The workpieces are added to the polishing machine together; the polishing time is 4~5 hours, and it needs to be stopped after every 1.5~2 hours of polishing, the hot water in the container is drained, and cold water is poured in, and the abrasives and workpieces in the box are cooled before polishing; Select φ2.5-φ3.5mm zirconium-aluminum composite balls as bright abrasives, and put the abrasives and workpiece into the polishing machine for 30-40 minutes. The invention reduces the inner and outer surfaces and end surfaces of the cage, and improves the product quality of the cage.