212results about How to "Improve surface finish quality" patented technology

The invention discloses a water-soluble total-synthesis metal working fluid and application thereof. The working fluid is prepared from the following raw materials in percentage by weight: 1wt%-30wt% of a lubricant, 1wt%-40wt% of a corrosion inhibitor, 1wt%-40wt% of organic amine, 1wt%-20wt% of a cleaning agent, 1wt%-20wt% of a coupling agent, 0.5wt%-5wt% of an antifoaming agent and the balance of water. The working fluid can form water-based steam with anti-rust property in an induction manner in the use procedure, so that the problem of rusting caused by steam which is easily generated by a closed machine tool is solved, and therefore, the working fluid is suitable for a high-precision machine tool, especially a numerical control machine tool with a closed structure.

The invention relates to a five-axis linkage numerical control machining technology, in particular to a five-axis numerical control machining method based on interpolation of a vector of a cutting tool. The five-axis numerical control machining method comprises the following steps of cutting tool track planning: performing interpolation calculation on the vector of the cutting tool under a workpiece coordinate system while the point position of the cutting tool is planned so as to obtain a cutting tool track equation after the vector of the cutting tool is subjected to interpolation and a cutting tool nose point value and a cutting tool vector under the workpiece coordinate system; double-NURBS (non-uniform rational B-spline) curve fitting: performing fitting on a curve formed by a cutting tool nose point and a second point on the axis of the cutting tool by using a double-NURBS curve fitting method; interpolation calculation: performing interpolation on a formed NURBS curve according to a feeding speed so as to obtain corresponding various axis coordinate values in a machine tool coordinate system; and machine tool kinematical modeling and solving: establishing a corresponding machine tool kinematical equation for a specific machine tool mechanism and finishing conversion between two coordinate systems. The five-axis numerical control machining method based on interpolation of the vector of the cutting tool has the advantages of high machining precision and high surface machining quality.

The invention relates to a command point shaping, compressing and interpolating method suitable for a numerical control device. The method comprises the following steps of: inserting an arc which has a distance with the middle point of a tolerance set by the numerical control device and is tangential with segments of adjacent command points to the middle point of every three adjacent command points when a numerical control processing procedure judges that any three adjacent command points on a processed curve surface meet a continuous processing condition, wherein the tangential points are used as interpolation points; trimming the interpolation points to reduce calculation errors and rounding errors in the process of reckoning the interpolation points; selecting a characteristic interpolation point through judging the bending directions of processing paths of all the interpolation points; fitting by using a continuous polynomial spline curve with a second derivative to generate a smooth curve; approximately calculating the interpolation points of a current interpolation period and sending the positions of the interpolation points to a servo system of the numerical control device; and driving a servo motor to move. The invention furthest improves the processing efficiency and reduces the influences of the calculation errors and the rounding errors on the processing precision and the processed surface smoothness.

The invention discloses a laser-assisted orthogonal micro-cutting device and method having an automatic laser focus following function, belongs to the technical field of machining equipment and aims to solve the problem that height changes of to-be-machined surfaces cannot be monitored in real time in laser-assisted micro-cutting processes in the prior art. A motion unit and a laser-assisted machining unit of the device are mounted on a shock-absorbing platform; an optical automatic following unit is arranged on the laser-assisted machining unit and comprises a lens A, a lens B and a linear array charge coupled device (CCD) sensor; laser emitted by a laser light source of the laser-assisted machining unit irradiates a to-be-machined surface via the lens A, and a laser beam reflected by the to-be-machined surface is focused on the linear array CCD sensor via the lens B; and the to-be-machined surface is mounted on the motion unit, and a computer control unit adjusts displacement of the to-be-machined surface in the direction X, the direction Y and the direction Z in real time by the aid of the motion unit according to the laser action range fed back by the linear array CCD sensor.

The invention provides a rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method. According to the rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method, on the basis that a pre-formed hole is obtained through electrolytic drilling and grinding by a fine electrolytic machine tool, online tool-changing operation is conducted on the machine tool to avoid positioning errors, axial ultrasonic vibration is applied to a rotary spindle of the machine tool, and electrolytic grinding and broaching are conducted on the pre-formed hole througha high-frequency pulse power supply. An electrolyte is disturbed through the cavatition and enhanced mass transfer effect of ultrasonic vibration to promote separated-out gas and other electrolytic products in a machining area to be discharged in time, so that the gas flow field and the gap electric field are more uniform, and the machining efficiency, the repeated machining precision and the surface machining quality are improved. Slight removal of workpieces is achieved through the high-frequency pulse power supply, so that the machining locality and the dimension controllability are improved, and precise adjustment of matching between electrolytic machining and mechanical grinding is facilitated. By adoption of the rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method, the small hole machining precision and the surface machining quality are improved while the machining efficiency is ensured.

The invention relates to a preparation method for a high-temperature-resistant ultra-thin antenna window and belongs to the technical field of ceramic-based composite materials. According to the method, the high-temperature-resistant ultra-thin antenna window is prepared by a series of processes of preparation of a perform, repeated dipping of high-purity silica sol, improvement of rigidity of the composite material, machining, washing, pickling, carbon heat removal, secondary repeated dipping of the high-purity silica sol and ceramic thermal treatment. The ultra-thin antenna window prepared by the method disclosed by the invention can meet a requirement on high-temperature resistance and is also high in rigidity and high in machinable property.

The invention relates to an ultrasonic oval vibrating mechanism for assisting a diamond cutter in ultra-precision cutting. The ultrasonic oval vibrating mechanism is characterized by comprising a cutter handle, a vibrating unit and a cutter, wherein one end of the cutter handle has a step-shaped structure; the vertical surfaces and the horizontal surfaces of an upper layer step and a lower layer step are provided with grooves; the vibrating unit comprises a vibrating body consisting of a transverse vibrating rod and a longitudinal vibrating rod which are vertical to each other; the top surface of the joint of the transverse vibrating rod and the longitudinal vibrating rod is provided with a groove; the end part of the transverse vibrating rod is provided with a transverse end face; the other side of the transverse end face is provided with a transverse excitation source and a transverse cover plate in sequence; the end part of the longitudinal vibrating rod is provided with a longitudinal end face; the other side of the longitudinal end face is provided with a longitudinal excitation source and a longitudinal cover plate in sequence; the transverse end face is formed on the vertical surface of the upper layer step of the cutter handle; the transverse cover plate and the transverse excitation source are positioned in the groove of the upper layer step; the longitudinal end faceis formed on the horizontal surface of the lower layer step of the cutter handle; the longitudinal cover plate and the longitudinal excitation source are positioned in the groove of the lower layer step; and the cutter is arranged in the groove at the joint of the transverse vibrating rod and the longitudinal vibrating rod.

The invention provides a slot feature side milling machining tool path generating method. According to the method, the double restraints of cutting force and the machine tool dynamics characteristic are taken into comprehensive consideration. The corner is machined through a multi-layer tool path based on circulation milling, and the side wall is machined with a sing-layer tool path. The tool contact angle is limited in the machining process, and the cutting force is restrained. By means of a variable helical curve, the change of the curvature of the tool path curve meets the machine tool dynamics characteristic. The cutting force and vibration in the machining process can be effectively reduced through the slot feature side milling machining tool path second-order continuity and guide rail curvature continuous changes, and the component machining quality, efficiency and yield are improved.

The invention discloses laser induced low pressure jet flow combined etching processing method and device thereof. The method comprises the following steps: the operations of cutting, drilling and slotting are performed on a workpiece by utilizing high-energy laser beams generated by a laser processing system, and meanwhile erosion is performed on the material surface subjected to laser ablation through high-speed jet flow beams generated by a corrosive medium jet flow device, so that the purpose of removing the material is achieved; the device comprises a laser device and a power source, and further comprises a jet flow generation device and a corrosion liquid circulating reflux device, wherein the jet flow device comprises a corrosion liquid tank, a plunger piston high pressure pump, a pressure gauge, an accumulator, a one-way control valve, a corrosion-resistant spray nozzle and a jet flow device fixed fixture. The method disclosed by the invention has the advantages that the laser ablation is mainly performed, the cooling of high-speed corrosive medium jet flow beams, synchronous erosion and combined processing effect of the cooling and the erosion are added on the basis of the laser ablation, so that the laser induced low pressure jet flow combined etching processing of the material is realized; the invention provides an efficient, clean and combined etching processing process.

The invention discloses a self-adaptive control method for large-curved-surface grinding. The method adapts to workpieces with different curvatures through adjusting positions of three support points from the center, shortens the contact force adjusting time through roughly adjusting the thread pre-tightening force to improve the efficiency, acquires the contact force in the grinding process through a stated sampling period to feed back force signals, sets a contact force threshold to calculate a mean value of contact force values acquired by continuous 5 times of sampling periods, and uses a set controller for generating driving signals to continuously adjust the torque direction and magnitude of a drive in a polishing tool module to change the deformation of an elastic part, so that the magnitude of the contact force is proper, a proper numerical value range is kept, and the relatively stable polishing contact force is realized. The method comprises five steps of: (1) grinding preparation; (2) workpiece touching; (3) trajectory planning; and (4) grinding; and the method can realize relatively constant polishing contact force, and improves the machining stability.

The invention provides an internal and external cooling structure for high-speed motorized spindle. According to the structure, cooling water channels are additionally arranged on a casing of the motorized spindle and a front bearing pedestal of the motorized spindle, and a spiral cooling water channel is arranged in the spindle, so that all the main heating components such as a motor stator, a motor rotor, a front bearing and a back bearing of the motorized spindle can be efficiently cooled, therefore, the temperature rising of the motorized spindle is effectively controlled, the service life of a motor and the service life of bearings can be prolonged, and the machining precision and surface machining quality of the motorized spindle are greatly improved by virtue of the reduction of thermal deformation.

The invention discloses an integrated finish machining method for an inner profile and a corner of a pocket. The integrated finish machining method comprises the steps that a rough machining allowance curvilinear equation is established according to rough machining information of the pocket; then a rough machining allowance curve is discretized; a discrete point of a side face allowance equation is subjected to outward normal bias to form a cutter location point of a machining side face; circular machining is conducted at the corner by using the discrete point at the corner and the side face allowance curvilinear equation according to a constant contact angle and maximum contact angle principle; the cutter location point of the corner is solved; an axial first cutter location point layer is further formed; the first cutter location point layer is subjected to axial cutting-in and bias layer by layer in the reverse-axial direction of a cutter till a last layer; all the cutter location points are obtained; a cutter advancing and retreating arc is set; and all the cutter location points are connected to form an integral cutter track of the integrated machining method for the inner profile and the corner of the pocket. With the adoption of the method, cutter changing is avoided; the machining quality of a workpiece surface is improved; the effect of a contact angle on stress of the cutter is taken into account; the constant contact angle and maximum contact angle principle is provided; the vibration of the cutter is reduced; and the service life of the cutter is prolonged.

The invention discloses a flat-end vertical milling cutter. N sets of evenly-distributed spiral chip grooves are formed in the periphery of the flat-end vertical milling cutter, wherein N is equal to or larger than two. The spiral chip grooves include the first spiral chip groove, the second spiral chip groove and the third spiral chip groove, wherein the first spiral chip groove spirally extends from the end to a rotary cutter handle; the second spiral chip groove intersects with the first spiral chip groove, and the turning direction of the second spiral groove is opposite to that of the first spiral chip groove; the third spiral chip groove is independent. The third spiral chip groove starts from the end and ends in the position behind the intersection of the first spiral chip groove and the second spiral chip groove or starts from the position in front of the intersection of the first spiral chip groove and the second spiral chip groove and ends in the position of the rotary cutter handle. The first spiral chip groove intersects with a rear cutter surface, so that a first cutting edge is formed. The second spiral chip groove intersects with the rear cutter surface, so that a second cutting edge is formed. The third spiral chip groove intersects with the rear cutter surface, so that a third cutting edge is formed. The turning direction of the third cutting edge is opposite to that of the first cutting edge, and the turning direction of the third cutting edge is the same as that of the second cutting edge. The flat-end vertical milling cutter has the advantage that the surface machining quality of a composite material can be effectively improved.

The invention discloses a desktop wood-plastic 3D printer with a grinding function, and relates to a desktop wood-plastic 3D printer with wood addition and subtraction. In order to solve the existing 3D printing layer-by-layer manufacturing form, the present invention has the problem that the shape accuracy, size accuracy and surface quality of parts are limited by the double limitation of single-layer printing thickness and plane printing accuracy. The invention includes a rectangular frame (1), which also includes a material subtraction component, a material addition component, and a work platform for adding and subtracting materials. Mounted on a rectangular frame (1). The present invention uses wood-plastic materials as raw materials for manufacturing, and realizes the layer-by-layer stacking of wood-plastic materials to carry out additive manufacturing technology; while the grinding process is a kind of cutting tool with the grinding wheel and the abrasive grains of the grinding wheel as the cutting blade, so as to achieve the required Dimensional shape accuracy, surface roughness requirements. The invention is used for wood-plastic extrusion printing.

The invention discloses a low-temperature drilling device of resin-based fiber reinforced composite material and a method thereof. The low-temperature drilling device consists of a low-temperature cooling device, a temperature control device, a cutting force measuring device and a processing unit. A resin-based fiber reinforced composite material laminated plate is drilled under a low-temperature environment, so that the defects of layering and burrs in the drilling of the resin-based fiber reinforced composite material laminated plate are reduced, and the drilled surface quality of the resin-based fiber reinforced composite material laminated plate is improved; and the optimal low-temperature drilling parameters are adjusted through measuring and estimating the cutting force.

A parallel grinding machining method of non-axisymmetrical aspherical optical element relates to a non-axisymmetrical aspherical optical element, providing a parallel grinding machining method of non-axisymmetrical aspherical optical element applying two interlinking axles of three axles of arc grinding wheel which is made of common diamond. The procedures are that: the processing mode is chosen, the processing parameter is set and the surface point locus G of workpiece is calculated with the non-axisymmetrical aspherical surface equation; with the parameter of arc grinding wheel, the central point locus O of grinding wheel is calculated when three axles of the grinder are coupled; the average value z0' of coordinate value is figured out from the lines of z coordinate value of O, and O is replaced with O'; nonlinear equations are established, with xg and zg as primary value and the Guass-Newton iterative algorithm, and the surface point coordinate xg' and zg' of workpiece are reversely worked out with x0 and z0'; then the xg' and zg' values are substituted in the non-axisymmetrical aspherical surface equation, thereby working out the surface point locus G' of workpiece; with the parameter of the arc grinding wheel, the central point locus O1 of grinding wheel is calculated when two axles of three axles of grinder are coupled.

The invention provides a machining device and method for synchronizing piezoelectric ceramic vibration and electrochemistry discharging and belongs to the field of special composite machining. When anelectrochemistry power source outputs pulse currents, a piezoelectric ceramic power source outputs forward voltage excitation signals synchronously, piezoelectric ceramic is bent upwards, and a gap between a workpiece and a tool electrode becomes smaller; during pulse intermittence of the electrochemistry power source, when no glass workpiece is subjected to discharging machining, the piezoelectric ceramic power source outputs negative voltage excitation signals, the piezoelectric ceramic is bent downwards, and the gap between the workpiece and the tool electrode becomes large. The electrochemistry power source and the piezoelectric ceramic power source carry out discharging synchronously to enable the machining gap during the discharging stage to be reduced, the utilization efficiency ofthe discharging energy is improved, and the machining locality is enhanced; and during discharging stop intermittence, the machining gap becomes large, which is beneficial for throwing out corrosiveimpurities and updating electrolyte.

An observation method for fluid precision finishing of surfaces of micro-structures of molds is based on a fluid flowing similar simulation method. A tiny mold structural surface is proportionally magnified, flowing states of sparse abrasive particle flows in tiny constraint flow channels are simulated, real-time image data in the flow channels are acquired and processed, and a distribution state, movement rules, typical flowing state characteristics and development trend of the sparse abrasive particle flows in environments of the tiny constraint flow channels are obtained; and experiments show that properties of forces stressed at various points in a flow channel model and properties of forces stressed at various corresponding points in a mold tiny constraint flow channel prototype are identical on the premise of meeting requirements of geometric similarity and kinematic similarity, the forces are proportional, a proportion constant keeps unchanged to optional corresponding points in two flow fields, and fluid dynamic properties of the two flow fields meet requirements of second law of flow similarity. The invention further provides an observation device for fluid precision finishing of surfaces of micro-structures of molds. The observation method and the observation device have the advantages that fluid finishing conditions and states for the surfaces of the micro-structures of molds can be well simulated, operation is simple, convenient and feasible, and universality is good.

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 binding-phase-free WC-based hard alloy cutter material and a preparation method thereof. According to the invention, tungsten carbide is used as a base material; nano complexphase ceramic doping is adopted, and the effects of defect reinforced sintering and liquid-phase reinforced sintering are synergistically exerted; meanwhile, two-dimensional graphene nanosheets and one-dimensional carbon nanotubes are hybridized to serve as a synergistic strengthening and toughening phase and a densification phase of the binding-phase-free WC-based hard alloy cutter material; thegraphene is loaded with carbon nanotube, the graphene is supported by the carbon nanotubes; a three-dimensional strengthening and toughening and rapid heat conduction network is constructed; dispersing agents which enable the two components to be mutually dispersed; a contact area of the graphene-carbon nano tube and a cutter material matrix is increased, and a graphene and carbon nano tube synergistic toughening mechanism and a synergistic heat conduction mechanism are formed in the aspect of function, so that the bending strength, Vickers hardness and fracture toughness mechanical properties of the obtained binding-phase-free WC-based hard alloy cutter material are greatly improved. The adopted graphene-carbon nanotube three-dimensional space structure has a high heat conduction coefficient, and the heat dissipation capacity of the cutter is greatly improved.

A special ultrasonic vibration auxiliary device for milling and its use method, the guide plate is fixed on the milling machine table, the guide plate is provided with a guide groove; the output plate is provided with a guide rail, the output plate is located above the guide plate, and the guide rail is located on the In the groove, the output plate and the guide plate are slidingly matched; the transducer is fixed on the milling machine table, and the horn is fixed horizontally between the transducer and the output plate; the ultrasonic generator is connected to the transducer through wires. The steps of the method of use are: respectively install the ultrasonic vibration guide plate, ultrasonic vibration output plate, transducer and parts on the milling machine table; connect the horn between the transducer and the ultrasonic vibration output plate; The device is connected to the ultrasonic generator; the milling tool is installed on the milling machine spindle; the milling machine and the ultrasonic generator are started; the ultrasonic vibration is output to the ultrasonic vibration output plate through the horn, and the parts are fed with the milling machine table; the parts are processed according to the milling parameters , turn off the milling machine and sonotrode, and remove the part.

The invention discloses a machining technology of an open structure part. The technical problems that open parts are deformed, and surface roughness and the wall thickness size are hard to guarantee can be effectively solved. Technological patches are designed according to the structural feature of the part; the open part of the part is cut open, and threads are tapped in the positions, in an opening, of the technological patches. The machining mode of artificially connecting the open part of the part through the technological patches and a connecting steel plate is adopted, so that the percent of pass and surface machining quality of the part are improved; the reject rate of the part is remarkably reduced; manufacturing cost is saved, and machining efficiency is improved.

The invention relates to a novel production method for a mixed grinding material. The method comprises the following steps: mixing zirconium silicate and alumina; carrying out ball milling on the mixture so as to obtain mixed micro-powder; putting the mixed micro-powder, water and a dispersant into a sorting barrel and standing the mixture for settlement after stirring; carrying out sorting, wherein two sub-steps are included, namely, a) sucking out a slurry on the upper layer of the sorting barrel with a siphon, adding clear water to the sorting barrel until the mixture reaches the initial liquid level before siphoning, and carrying out stirring, settling and siphoning so as to obtain particles of a grade, and b) adding the dispersant and clear water into the sorting barrel until the mixture reaches the initial liquid level before siphoning and repeating the steps of stirring, settling and siphoning so as to obtain particles of another grade; drying the obtained particles with different grades so as to obtain a finished product. The mixed grinding material produced in the invention enables damage of micro-powder to the surface of a ground material in grinding to be substantially reduced and plays a very critical role in improving the quality of surface polishing of an object and in reducing polishing cost.