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253results about How to "Improve machined surface quality" patented technology
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Cutting insert with curved cutting edge
InactiveUS6957935B2Extended service lifeImprove flatnessMilling cuttersMilling equipment detailsSwarfKnife blades
A cutting insert for a milling machining adapted to be mounted on a milling cutter to carry out cutting operation and having primary and secondary cutting edges provided at sides of a rectangular body, each primary cutting edge having a curved line tangential to the adjacent secondary cutting edge, to reduce the cutting force and improve flatness of the side surface of a machined workpiece. The cutting insert includes an upper face, a bottom face and a plurality of side faces connecting the upper face and the bottom face. The primary cutting edge has chip breakers for guiding chip flow, primary cutting edge land faces and primary cutting edge clearance faces. The primary cutting edges enable a bottom surface and a side surface of a machined workpiece to have a right angle therebetween.
Owner:KORLOY
Rotary ultrasonic machining device based on non-contact energy transfer
InactiveCN105171131AImprove processing efficiencyImprove machined surface qualityPositioning apparatusMetal-working holdersNumerical controlEnergy transfer
The invention discloses a rotary ultrasonic machining device based on non-contact energy transfer. The rotary ultrasonic machining device based on non-contact energy transfer comprises a high-speed electric spindle, a primary side assembly fixed to the lower end of the high-speed electric spindle, an ultrasonic knife handle assembly composed of an ultrasonic knife handle and a secondary side assembly arranged on the periphery of the ultrasonic knife handle, and an ultrasonic power supply generator. The ultrasonic knife handle assembly is arranged at the lower end of the high-speed electric spindle, so that the secondary side assembly corresponds to the primary side assembly up and down. The ultrasonic power supply generator is connected with the primary side assembly. According to the rotary ultrasonic machining device based on non-contact energy transfer, the ultrasonic machining technology can be directly combined with existing computer numerical control (CNC) machining centers such as CNC engraving and milling machines, engraving and milling machines, high-gloss CNC machines and drilling and tapping centers, and original spindles do not need to be modified; non-contact energy transfer of ultrasonic waves is achieved through the primary side assembly and the secondary side assembly, and the rotation speed reaches 10,000 turns / min; in addition, the automatic knife switching function can be achieved by using an exiting magazine.
Owner:YUHUAN CNC MACHINE TOOL
Coarse-pitch external thread layered turning process
InactiveCN105537695AImprove rough machining efficiencyReduce geometric errors in rough machiningThread cutting machinesTurning toolsEngineeringMachining process
The invention relates to an external thread turning process, in particular to a coarse-pitch external thread layered turning process. The process aims at solving the problem that by means of existing thread turning methods, because the requirements for massive removal and high-precision machining of coarse-pitch external threads can not be met, thread surface machining principle errors and cutter marks exist in coarse-pitch external thread turning, the problem that because of the overlarge cutting load, cutter abrasion is quick, and the problem that because of staggered threads and an excessively large number of layered cutting times caused by cutter starting point error accumulation, the machining efficiency is low is solved. The process includes the process of conducting rough machining by removing thread rough machining allowance through multiple cutting edges in a radial continuous multi-time feed layered cutting mode and a left-right axial multi-time layered cutting mode, and the process of conducting semi fine machining and fine machining in a layered cutting mode by feeding the left cutting edge and the right cutting edge alternately multiple times in the axial direction. The requirements for the machining precision and the machining surface quality of external threads are met, obtained left and right threaded faces are free of cutter marks, the problem that threads are meshed in disorder is solved, and the requirement for efficiently turning coarse-pitch external threads in a high-quality mode is met.
Owner:HARBIN UNIV OF SCI & TECH
High-frequency ultrasonic elliptical vibration cutting device
InactiveCN101502971AIncrease the critical vibration velocityHigh vibration frequencyAuxillary equipmentMechanical vibrations separationTransformerSurface roughness
The invention discloses a high frequency ultrasound elliptic vibration cutting device which comprises an ultrasound vibration unit and a casing unit. The ultrasound vibration unit is arranged in the casing unit. The casing unit comprises a base, A cover plate, B cover plate and an upper cover plate. The ultrasound vibration unit comprises an amplitude transformer, a vibrating body, A excitation source, B excitation source and C excitation source. The amplitude transformer is installed on the vibrating body. The end part of the amplitude transformer is provided with a cutting tool. The A excitation source and the B excitation source are arranged in parallel way and are adhered on the lateral side of the vibrating body. The C excitation source is installed on the lower part of the vibrating body. The A excitation source and the B excitation source form the driving power in horizontal direction. The C excitation source forms the driving power in vertical direction. The phase separation between two mutually vertical high frequency vibrations is applied for compounding an elliptic vibration at the point of the cutting tool. Thus, the processing surface roughness is lowered effectively. The cutting device works at the high vibration frequency of 100 kHz-200 kHz, so that the vibration chipping critical speed of the cutting tool is improved, and the processing efficiency is improved obviously. The amplitude transformer is adopted to be inserted in the vibration body, so that the installation is easy, and the practicality of the ultrasound elliptic vibration cutting can be promoted.
Owner:BEIHANG UNIV
Filtering and cooling device for computerized numerical control gantry machine tool
InactiveCN102248444AReduce the temperatureExtend your lifeMaintainance and safety accessoriesNumerical controlMachined surface
The invention relates to a filtering and cooling device for a computerized numerical control gantry machine tool, which comprises a bed body, a primary filtering and lifting device, a secondary filtering and lifting device and an air cooling device; spiral scrap removal devices are arranged on the two sides of the bed body respectively; metal scrap lifting devices capable of lifting metal scraps discharged by the spiral scrap removal devices are arranged at the tail ends of the spiral scrap removal devices; the primary filtering and lifting device is used for initially filtering the cooling liquid in the metal scrap lifting devices, the secondary filtering and lifting device is used for filtering the cooling liquid which is filtered by the primary filtering and lifting device again; and the filtered and cooled cooling liquid completely meets the requirements for high-speed tool machining, the quality of the machined surface of a machined workpiece is improved, the production efficiency is increased, the service life of the tool is prolonged and the machining and cutting speed is increased.
Owner:CHANGZHOU CHANGLONG MACHINE TOOL MFG
Diamond grinding wheel of elliptical working face and mutual wear forming and trimming method thereof
ActiveCN102350666AEasy to trimTrimming is effectiveAbrasion apparatusAbrasive surface conditioning devicesCarbide siliconStructural engineering
The invention discloses a diamond grinding wheel of an elliptical working face and a mutual wear forming and trimming method thereof. The profile of an axial section of a working face of the diamond grinding wheel is an elliptical arc profile; an end face of the diamond grinding wheel is an elliptical face; in the method, a diamond grinding wheel tool travels from left to right to a top point of an elliptical arc at a first starting point outside one side of a silicon carbide grinding stone along an elliptical arc traveling path, is then lifted along a first circular arc tangential to the top point and with a radius of more than 2mm, next travels from right to left to the top point of the elliptical arc from a second starting point outside the other side of the grinding stone along the elliptical arc traveling path and is lifted along a second circular arc tangential to the top point and with a radius of more than 2 mm. Compared with the conventional circular face diamond grinding wheel, the elliptical face diamond grinding wheel has the advantages that: a flatter grinding wheel elliptical working face and a workpiece curved surface can be used for complexing to grind, the number of effective grinding particles is increased, and the surface quality and the shape accuracy of curved surface grinding are improved.
Owner:SOUTH CHINA UNIV OF TECH
Tool deflection modeling method for multi-axis machining system
ActiveCN104182631AVariation law of accurate deviationThe compliance model is accurateProgramme controlComputer controlDrive shaftEngineering
The invention discloses a tool deflection modeling method for a multi-axis machining system. The tool deflection modeling method includes establishing a new non-deformable cutting thickness model, and a cutting force prediction model of arc-tool variable-posture milling by the vector method; establishing a flexibility model of a machine transmission shaft by the equivalent column method and a comprehensive flexibility model of the machining system by force ellipsoid method and coordinate system transformation; finally utilizing the cutting force model in the process of variable-posture machining and the flexibility model at the tail end of the multi-axis machining system to obtain a tool deflection model. In the tool deflection modeling method, the non-deformable cutting thickness model of a new tool cutting blade and the comprehensive flexibility model of the multi-axis machining system are used to obtain a more accurate tool deflection change law during machining, so that the tool postures during multi-axis machining and machining parameters such as feed speed and spindle revolving speed are optimized, tool deflection is controlled, and quality of machined surfaces of workpiece is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Grinding Center
InactiveCN102259282ACompact structureImprove transmission efficiencyRevolution surface grinding machinesControl systemEngineering
A grinding processing center, in order to solve the problem of single function of the existing grinding machine, it includes a bed, a large carriage, a workbench, a column, a horizontal grinding head assembly and a vertical grinding head assembly, a lubrication system, and a control system. The control system includes The computer numerical control system and servo system mainly adopt the vertical and horizontal double grinding head structure with external memory, which can realize six-axis linkage, compact structure and high transmission efficiency, which can meet various grinding processing needs.
Owner:XIANGTAN SANFENG CNC MACHINE TOOL
Combined machining system and method of ultrasonic vibration assisted grinding and magnetic polishing
InactiveCN109623504ARealize online automatic sharpeningImprove removal efficiencyWorking fluidMachined surface
The invention relates to a combined machining system and method of ultrasonic vibration assisted grinding and magnetic polishing. Ultrasonic vibration enables a diamond grinding wheel or workpiece toperform forced reciprocating vibration to enable suspended abrasive particles in working fluid to erode a machined surface and sharpen the surface of the grinding wheel. When the grinding wheel is outof the contact with the workpiece due to vibration and magnetorheological fluid flows through a gap between the grinding wheel and the workpiece, a magnetorheological effect occurs due to being subjected to the action of magnetic field force, an ''elastic polishing film'' is formed by rapid solidification, and hard abrasive particles contained in the magnetic fluid are evenly distributed on the surface of the ''elastic polishing film'', so that finishing process of the workpiece and sharpening of the grinding wheel are achieved. When regaining to be in contact with the workpiece due to vibration, the grinding wheel is directly involved in grinding the surface of the workpiece, and the forced reciprocating vibration of the grinding wheel enables frequent pulse cutting action to exist between the grinding wheel and the workpiece. According to the combined machining system and method of ultrasonic vibration assisted grinding and magnetic polishing, three technologies including ultrasonicmachining, grinding machining and magneto-fluid polishing are multi-combined, automatic on-line sharpening of the grinding wheel is realized, and high material removal rate and low damage surface quality are obtained.
Owner:ROCKET FORCE UNIV OF ENG
Diamond coating cutter, and preparation method and application thereof in high speed graphite processing
ActiveCN105563665AReduce cutting shock and vibrationAvoid breakingChemical vapor deposition coatingStone-like material working toolsHardnessLow friction
The invention discloses a diamond coating cutter, and a preparation method and the application thereof in high speed graphite processing. The diamond coating cutter comprises a cutter tip, a blade and a clamping cutter holder, wherein the clamping cutter holder is made of a hard alloy matrix, the cutter tip and the blade are coated with diamond coatings on matrix materials, the diamond coating cutter is characterized in that the end cutting edge front angle gamma o1 of the blade is 2 to 6 degrees, the end cutting edge rear angle alpha 1 is 5 to 13 degrees, the peripheral cutting edge front angle gamma o2 is 5 to 15 degrees, the peripheral cutting edge rear angle alpha 2 is 10 to 14 degrees, and the helical angle beta is 15 to 45 degrees. The diamond coating cutter provided by the invention has the characteristics of high hardness, wear resistance, low friction coefficient, good heat conduction and the like, is suitable for high speed graphite processing, can effectively overcome frictional wear caused by graphite dust to the surface of the cutter, and is classified as an ideal cutter for cutting graphite.
Owner:GUANGDONG UNIV OF TECH
Electric spark mechanical composite grinding method and machine for non-conductive superhard material
ActiveCN1557606AImprove processing efficiencyLow costOther manufacturing equipments/toolsSuperhard materialControl system
The present invention is composite electric spark machine grinding method and machine apparatus for machining non-conductive super-hard material. During the machine, the rotary conducting grinding wheel is used as one electrode for electron spark grinding, electrode sheet feeding along the surface of the workpiece as the other electrode, and the spark discharge in the surface of workpiece between the conducting grinding wheel and the sheet electrode makes the surface of the workpiece of non-conductive super-hard material carbonized and denatured for being eliminated via mechanical grinding. The machine apparatus includes machining unit, pulse power source, control system and liquid supplying system. The sheet for machining is wound onto a barrel, which is driven by a DC motor for servo motion. The present invention has high machining efficiency on non-conductive super-hard material, high surface quality and low machining cost.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
External spline cold beating tool
The invention provides an external spline cold beating tool. The external spline cold beating tool comprises a tool rotating shaft, fixed sleeves, locking blocks, copper sleeves and a cold beating wheel, wherein the fixed sleeves are fixed on a translation mechanism; the tool rotating shaft can axially rotate in the two fixed sleeves; a groove is formed in the tool rotating shaft; the copper sleeves are fastened on the cylindrical surface of the groove through threads; the cold beating wheel is mounted in the groove; the detachable locking blocks are respectively mounted on the two fixed sleeves; and the shapes of the inner walls of the locking blocks are matched with the shaft part of the cold beating wheel, so that the cold beating wheel can rotate along the cylindrical surface consisting of the inner walls of steps on the inner sides of the fixed sleeves and the inner walls of the locking blocks. The external spline cold beating tool is synchronously used on two sides of a workpiece, can realize symmetric force application in the cold beating process of a torsion rod, enables the torsion rod to be uniformly stressed in the diameter direction, and meanwhile, adopts the integral cold beating wheel to greatly improve the surface machining quality and the spline precision; and meanwhile, compared with such traditional milling modes, the external spline cold beating tool can greatly shorten the machining time and improve the machining efficiency.
Owner:BEIJING NORTH VEHICLE GROUP CORP
Method for forming cutter machining tracks on NURBS combined curved surface
ActiveCN106354098AImprove dynamic propertiesReduce wearProgramme controlComputer controlNumerical controlVector field
The invention relates to a method for forming cutter machining tracks on an NURBS combined curved surface and belongs to the technical field of numerical control machining. According to the method, by splicing vector fields, the problem that the smooth and topologically controllable cutter machining tracks are formed on a C1 continuous NURBS combined curved surface is solved. The method comprises the following steps: carrying out sampling on each surface piece of the combined curved surface along the feeding direction, respectively, so as to obtain the feeding direction of each surface piece in a corresponding parameter domain; establishing a localized feeding vector field based on a stream function represented by a sample-B primary function polynomial on each surface piece parameter domain, and regulating the control parameters close to the borders of adjacent vector fields, so as to realize the G1 splicing of the vector fields; and selecting required series flow lines from the G1 continuous combined vector field according to the machining precision requirement, and mapping the series flow lines to the combined curved surface, so as to obtain the feeding tracks required by the machining. According to the method, the uniform expression meeting machining track line groups of the C1 continuous combined curved surface is achieved, and smooth and various-form machining tracks can be formed.
Owner:DALIAN UNIV OF TECH
Electric spark induction controllable erosion and mechanical finishing compound cutting dual-servo feeding processing system
ActiveCN102974902AHigh removal rateSolve the problem of low processing efficiencyControl systemCutting force
The invention discloses an electric spark induction controllable erosion and mechanical finishing compound cutting dual-servo feeding processing system which is characterized by comprising an electric spark induction erosion electrode servo feeding control system (1) using an erosion state as a sampling basis and a mechanical finishing tool automatic feeding regulating system (2) using a cutting force as a sampling basis, wherein the electric spark induction erosion electrode servo feeding control system controls the feeding of an induction erosion electrode, ensures that the electric spark induction erosion in a machining region is controllably, efficiently and stably carried out, and forms an erosion product and a softened layer through controllable erosion; and the mechanical finishing tool automatic feeding regulating system ensures that the erosion product and the softened layer which are generated by erosion are cut and removed without cutting a base body material, so that the tool loss is reduced, the finished surface quality is ensured and the processing efficiency is increased. According to the invention, the processing efficiency of a metal material difficult in processing can be remarkably increased, the finished surface quality is increased, and the finished surface is final mechanized surface due to the mechanical finishing function of a tool.
Owner:南京航浦机械科技有限公司
Multiple cutter blade and cutting tool
InactiveCN1443619AImprove machined surface qualityHigh speed cuttingMilling cuttersWorkpiecesRotational axisMachined surface
Owner:MITSUBISHI MATERIALS CORP
Preparation method of CVD diamond micro-milling cutter
InactiveCN108941715AReduce crackingReduce grinding loadMilling cuttersDiamondSurface layerMilling cutter
The invention provides a preparation method of a CVD diamond micro-milling cutter and belongs to the technical field of mechanical cutting tool manufacturing. In the machining process, firstly, appropriate laser parameters are selected by utilizing the diamond laser grpahitizing principle, a surface layer of a diamond cutter is modified into a multihole loosened powdered and solid-shape modified layer by laser inducing, the grinding load is lowered; and then the graphitized diamond cutter precision cutter grinding is subjected to precision cutter grinding according to the designed shape and grinding parameters by a precision cutter grinding machine. With the adoption of the preparation method, the high-quality CVD diamond micro-milling cutter can be machine more efficiencly, a cutting edgeof the CVD diamond micro-milling cutter is sharp, flaws are few, and the CVD diamond micro-milling cutter can be preferably applied to precision and micro-machining fields.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Pulse laser processing-based novel positive rake diamond abrasive tool manufacturing method
ActiveCN105728961AReduce microcracksReduce residual stressGrinding devicesWelding apparatusLaser processingPhase change
The invention relates to a pulse laser processing-based novel positive rake diamond abrasive tool manufacturing method, being characterized in that a diamond grinding wheel with orderly-arranged abrasive particles is eroded by pulse laser, so that a vertex angle of the diamond abrasive particles is changed from being greater than 90 degrees to being smaller than 90 degrees, thus a traditional negative rake grinding method of a diamond abrasive tool is changed, and the abrasive particles taking part in the grinding are changed into a positive rake machining mode during grinding. Compared with traditional grinding (namely negative rake grinding), when the positive rake diamond grinding wheel is used for grinding, three processes of scratching, plowing and cutting are not needed, cutting is directly performed, and the traditional grinding machining mode is changed. When the diamond grinding wheel performs positive rake grinding on a hard and brittle material, normal grinding force is less than tangential grinding force, and the normal grinding force and the tangential grinding force during positive rake grinding are both less than those during negative rake grinding, so that surface / subsurface damages, such as microcracks, residual stress, phase change, dislocation and ripple, of the hard and brittle material subjected to grinding are effectively reduced, and the surface completeness of the material can be greatly improved.
Owner:HUNAN UNIV
Design of main shaft of rotary ultrasonic machine
InactiveCN102452131AImprove surface qualityDoes not change chemical/electrical propertiesStone-like material working toolsDevice formEngineering
The invention relates to a design of a main shaft of a rotary ultrasonic machine, in particular to an efficient device formed by combining an ultrasonic machine tool and a general machine tool. The efficient device can finish the drilling and tapping of ceramic materials. According to the characteristics of ultrasonic vibration, the main shaft of the rotary ultrasonic machine is designed referring to the structure and working principle of the existing machine tool, and the working principle and rotary ultrasonic drilling material removing principle of the rotary ultrasonic machine are analyzed to enable the rotary ultrasonic machine to finish the drilling and tapping of ceramic materials. Ultrasonic waves are applied to a wire saw, and materials are removed by the instantaneous impact of abrasive materials, so that the surface quality of the workpiece cut by the wire saw is superior to that of the workpiece cut by a common wire saw.
Owner:褚桂君
CVD diamond grinding wheel with ordered micro-structured surface and making method thereof
ActiveCN107962510AIncrease the number of effective sharpeningImprove surface qualityBonded abrasive wheelsGrinding devicesMaterial removalGas phase
The invention discloses a CVD diamond grinding wheel with an ordered micro-structured surface and a making method thereof. The grinding wheel is characterized in that a layer of diamond film is deposited on the outer circumferential face of a grinding wheel hub, a large number of staggered in-order micro grinding units are machined on the whole outer circumferential face of the diamond film, and the top ends of the grinding units are in kidney shapes. The making method is characterized in that through the chemical vapor deposition that is CVD, the diamond film is deposited on the outer circumference face of the grinding wheel hub, a pulse laser beam is adopted to machine the large number of micro grooves with the same geometric dimensioning in the outer circumference face of the whole diamond film, and the large number of micro grinding units are formed; the grinding units are arranged in a staggered and in-order manner, the top face of each grinding unit is in a kidney shape, according to the grinding wheel, the effective sharpening number of the grinding wheel during grinding can be improved, the chip formation efficiency and the surface material removal rate are improved, the cutting performance is improved, the surface machining quality and the cutting efficiency can be improved, the holding force of the grinding wheel hub to the grinding units can be increased, and the service life of the grinding wheel can be obviously prolonged.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Ultrasonic vibration lens micro-rotation assisted laser machining device
InactiveCN109604817AImprove surface qualitySimple structureLaser beam welding apparatusLaser processingFixed frame
The invention discloses an ultrasonic vibration lens micro-rotation assisted laser machining device. The ultrasonic vibration lens micro-rotation assisted laser machining device comprises a laser generator and an ultrasonic generator, the output end of the laser generator is connected with one end of a collimating lens of a laser working head through an optical fiber terminal, the laser working head comprises the collimating lens, an ultrasonic transducer, an amplitude-change rod, a focusing lens micro-rotation mechanism and a fixing frame, the laser working head is fixed to a machine tool spindle through the collimating lens, a clamp and internal hexagonal bolts, the fixing frame comprises a fixing frame bottom plate, the focusing lens micro-rotation mechanism is arranged in the middle ofthe upper surface of the fixing frame bottom plate, the top of the focusing lens micro-rotation mechanism and one end of the amplitude-change rod are in threaded connection, the other end of the amplitude-change rod and a lower cover plate of the ultrasonic transducer are in threaded connection, and the fixing frame bottom plate and an upper cover plate of the ultrasonic transducer are fixedly mounted through four connecting columns. By controlling the ultrasonic vibration amplitude and a rotating shaft sleeve, the size of a trapezoidal column focus formed by a laser focusing lens is finely adjusted, and the laser machining device can finely adjust the shape dimension of the focus.
Owner:NORTHEASTERN UNIV
Punching compound die
InactiveCN103317024AIncrease profitIncrease productivityShaping toolsPerforating toolsPunchingMechanical engineering
A punching compound ide comprises an upper die portion and a lower die portion. The upper die portion comprises a die shank, an upper die seat, an upper die baseplate, two upper top blocks, a rubber cushion block, an upper press block and two guide sleeves. The die shank is positioned above the upper die seat, and the upper die baseplate is positioned below the upper die seat. The upper top blocks are positioned below the upper die baseplate, and are mounted on the left portion and the right portion of the upper die baseplate through hexagon socket head bolts and dowels respectively. The rubber cushion block is positioned below the middle of the upper die baseplate. The upper press block is positioned below the middle of the rubber cushion block, and penetrates into the upper die baseplate from the upper die seat in a threaded mode to be connected with the rubber cushion block and the upper press block. The guide sleeves are positioned at two positions in front of the lower side of the upper die seat, and are mounted below the upper die seat in a close-fitting mode. By the punching compound die, shearing of workpieces with different materials, arcs and bore diameters can be realized.
Owner:HENGYANG FINANCE ECONOMICS & IND POLYTECHNIC
Special numerical control machine tool for machining small part
InactiveCN107971750ASolve processing problemsRealize processing automationFeeding apparatusOther manufacturing equipments/toolsNumerical controlEngineering
The invention discloses a special numerical control machine tool for machining a small part. The special numerical control machine tool comprises a machine tool body, a control mechanism and a three-axis machining mechanism; the Y-axis machining mechanism comprises a liftable large slide carriage; an X-axis machining mechanism comprises an X-axis ball screw; an X-axis stepping motor is used for driving the X-axis ball screw so that a small slide carriage can be driven to move horizontally by an X-axis nut; two groups of worktables and a row tool type tool magazine are detachably installed on the small slide carriage; two Z-axis machining mechanisms are arranged; each Z-axis machining mechanism comprises a Z-axis ball screw; and each Z-axis stepping motor is used for driving the corresponding Z-axis ball screw so that an electric spindle can be driven to move horizontally by a Z-axis nut. The special numerical control machine tool disclosed by the invention improves the part machining efficiency, increases the percent of pass of products, guarantees the machining quality and the stability of the machining quality, can be provided with different cutting tools according to the machining content of different types of work pieces so as to implement various machining of milling, drilling, chamfering, deburring and the like, realizes procedure centralization and machining automation of the small part, and alleviates the labor intensity of a worker.
Owner:SHANGHAI DIANJI UNIV
Finish-milling feeding speed optimizing method based on integral impeller blade shape
ActiveCN103586738AImprove processing efficiencyGuarantee the quality of the machined surfaceAutomatic control devicesWorkpiecesImpellerProcess quality
The invention discloses a finish-milling feeding speed optimizing method based on integral impeller blade shape. The method comprises the steps of generating a finish-machining cutter track source file of a spherical head cutter blade with the radius as RT and based on a spherical head according to a geometrical shape of an integral impeller blade, introducing a single impeller blade model, judging the cross line between a runner and the blade according to the distance between a point on the blade and the center of an impeller, extracting the cross line, discreting the cross line into W points according to equal chord heights, composing a point set U through W points, setting the longitudinal depth acceleration proportion omega between the top end of the blade and the tail end of the blade, sequentially reading and analyzing the cutter track source file generated in the step 1 line by line, and extracting cutter point information of all cutting paths in the cutter track source file generated in the step 1. In addition, the cutter track source file records cutter point coordinates under a processing coordinate system and cutter axis vectors corresponding to the cutter point coordinates. The finish-milling feeding speed optimizing method solves the technical problems that an existing method is low in processing efficiency, poor in processing quality and serious in cutter abrasion.
Owner:HUAZHONG UNIV OF SCI & TECH
Ultrasonic-vibration surface-enhanced and finishing processing device with electric-contact heating assistance
The invention discloses an ultrasonic-vibration surface-enhanced and finishing processing device with electric-contact heating assistance. The ultrasonic-vibration surface-enhanced and finishing processing device comprises an electric brush, a main shaft, a guide line, an arc-extinguishing device, a power supply, an ultrasonic-vibration generation device, a workpiece and a chuck, wherein a knife head of the ultrasonic generation device, the power supply, the arc-extinguishing device, the electric brush sheathed on the main shaft, the main shaft, the chuck and the workpiece are connected in sequence and in series to form a conducting loop; current generated in the conducting loop is utilized to enable a material of the contact part between the surface of the workpiece and the knife head to generate joule heat for instantaneous warming and softening, and by combination of ultrasonic vibration, finishing processing, surface enhancement, fine-grain enhancement and residual stress elimination are realized. The invention also discloses an ultrasonic-vibration surface-enhanced and finishing processing method with the electric-contact heating assistance utilizing the device. The ultrasonic-vibration surface-enhanced and finishing processing device and method disclosed by the invention have the advantages that the structure is simple, the precise finishing processing and surface enhancement of various conducting materials can be realized, the quality of the processed surface can be improved, the surface roughness is reduced, the surface residual stress can be eliminated, and the ultrasonic vibration also can play a role in enhancing fine grains of the material of the surface of the workpiece.
Owner:SHANDONG UNIV
Floating disc suspension polishing device
ActiveCN103331691AAvoid damageImprove machined surface qualityLapping machinesEngineeringMechanical engineering
A floating disc suspension polishing device comprises a polishing base disc and a floating disc, wherein wedge grooves and processing stations for placing workpieces to be processed are formed and arranged on the surface, opposite to the floating disc, of the polishing base disc in the circumferential direction; the wedge grooves are filled with polishing solutions; the wedge grooves and the processing stations are arranged at intervals; the polishing device further comprises a spring, a force sensor, a lifting platform and a master driver; the polishing base disc and the master driver are connected and can rotate around a spindle; the polishing base disc is positioned on the floating disc; the floating disc is connected with the upper end of the spring; the lower end of the spring is connected with the force sensor; and the force sensor is fixedly connected with the lifting platform. The floating disc suspension polishing device presses precisely, grinds stably, and is small in surface damage and high in quality.
Owner:奥特贝(天津)机器人有限公司
Modularization type material addition and reduction composite repairing method for defective region of component surface
ActiveCN110640146AImprove repair efficiencyImprove restoration qualityAdditive manufacturing apparatusIncreasing energy efficiencyPoint cloudStructural engineering
The invention provides a modularization type material addition and reduction composite repairing method for a defective region of a component surface and relates to the technical field of machining. The main process of the method comprises the following steps of: implementing three-dimensional scanning on the defective region of the component surface and acquiring point cloud data of a to-be-repaired region; calculating the characteristic parameters of the defective region according to the point cloud data; selecting a corresponding geometric module according to the characteristic parameters;implementing modular milling and removal on the defective region to obtain a regular to-be-repaired region; implementing modular laser melt-coating repairing on the to-be-repaired region; and precisely milling the laser-repaired surface to end the repairing. By adopting a material addition and reduction composite way, the method provided by the invention repairs a complicated irregular defective appearance into a regular geometry; on the basis, the modular to-be-repaired geometry is subjected to laser melt-coating repairing; and the operation route is conveniently and quickly planned, so the overall repairing efficiency is improved. Beside, the precise milling for the laser melt-coating region can maintain the repairing precision of the contour of the repaired surface, and the use performance of the repaired surface is also improved.
Owner:NANJING INST OF TECH
Chip absorbing and cooling connecting piece used for boring end effector
InactiveCN101444851AAdjustable spray heightAdjustable spray angleBoring/drilling componentsMaintainance and safety accessoriesEngineeringActuator
The invention discloses a chip absorbing and cooling connecting piece used for a boring end effector, which is installed on the front plate of the supporting unit of the boring end effector. The chip absorbing and cooling connecting piece comprises a pressure head pipe casing, an A nozzle, a B nozzle and a pressure foot, wherein, the structure of the A nozzle is identical with that of the B nozzle; the A nozzle and the B nozzle are respectively installed in an A threaded hole and a B threaded hole at the upper part at the front end of the pressure head pipe casing, and the rear end of the pressure head pipe casing is installed in the counter sink of the pressure foot. The chip absorbing and cooling connecting piece is provided with two nozzles, can realize the switch between the cooling modes and cooling mediums in one drilling process, such as the gas cooling mode can be switched to the liquid cooling mode, or a cutting fluid can be switched to another cutting fluid, and switching is useful particularly when laminating materials consisting of different materials are processed.
Owner:BEIHANG UNIV
High-speed rotary ultrasonic torsional processing device
InactiveCN102873019AIncrease speedReduce volumeMechanical vibrations separationRare earthUltrasonic machining
The invention discloses an ultrasonic processing device, in particular to a high-speed rotary ultrasonic torsional processing device which comprises an output shaft and a transmission shaft. A rare-earth rod and tubular piezoelectric ceramic are mounted in an inner bore of the output shaft from inside to outside along an axial direction sequentially. An induction coil is wound on the output shaft, a coil former and an outer sleeve are arranged on the outer side of the transmission shaft, a closed coil storage chamber is formed by the coil former and the outer sleeve, and an excitation coil is disposed in the coil storage chamber. The ultrasonic torsional processing device which is manufactured on the basis of rare earth magnetostriction materials and piezoelectric ceramic materials is connected with a spindle of a machine, is subjected to two-dimensional ultrasonic mechanical vibration while driving a tool head to rotate at high speed, and thus, ultrasonic torsional processing of workpieces is achieved. Besides, the device realizes high-speed rotary ultrasonic torsional processing, ultrasonic frequency band is wide, ultrasonic energy is high, running state is stable, ultrasonic vibration amplitude can be regulated by changing magnetic field intensity and prepressure, and accordingly requirements of different processing precisions can be met.
Owner:ZHONGBEI UNIV
End part cutter for valve rod
InactiveCN103419115AReduce processing costsImprove fatigue strengthGrinding machinesEngineeringBoron nitride
The invention discloses an end part cutter for a valve rod, and belongs to valve production equipment, in particular to equipment special for cutting the valve rod. The end part cutter for the valve rod is characterized by comprising a valve rotating driving device, a valve positioning device and a valve rod end part cutting device, wherein the valve rotating driving device consists of two parallel rollers and a pressure roller positioned above the valve rod, and the two rollers are positioned below the valve rod, are provided with rotating driving devices, and synchronously rotate in the same direction; the valve positioning device consists of a rotating positioning rod positioned outside a valve retainer and a disc-shaped movable positioning head arranged at the front end of the positioning rod; the valve rod end part cutting device is a high-speed rotating CBN (cubic boron nitride) grinding wheel with a feeding system. The end part cutter has the beneficial effects that the machining accuracy of a product is improved; machining burrs are avoided, and end face run-out is greatly reduced; in addition, subsequent end face grinding and rod end chamfering procedures can be reduced.
Owner:济南沃德汽车零部件有限公司
Processing method of complicated curve surface of fragile material
ActiveCN107116707AIncrease the frequency of intermittent cuttingReduced single-cut removalWorking accessoriesFine working devicesEngineeringMachining process
The invention relates to a processing method of a complicated curve surface of a fragile material. The processing method comprises the steps that according to the shape of a surface to be processed, an appropriate fly cutter spindle turning radius and an appropriate milling feeding direction, and a fly cuter turning spindle can be selected to be parallel to the milling feeding direction or perpendicular to the milling feeding direction; according to the processing process characteristics and the cutting characteristics of a material, appropriate cutting parameters and appropriate cutting tool geometric parameters are design so as to guarantee that the removal amount of the material in single-pass cutting is controlled within a plastic removal rang; based on the cutting parameters and the cutting tool geometric parameters, a processing path of fly cutter cutting and milling feeding is generated, and path compensation is conducted before processing, and after compensation, the contour of a cutting tool traverses the path to form a processed surface; a workpiece to be processed is mounted on a spindle of an ultra-precision machine tool, and a fly cutter is perpendicularly mounted on an ultra-precision milling shaft; and the workpiece is processed.
Owner:TIANJIN UNIV
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