66results about How to "Improve surface accuracy" patented technology

The invention relates to cerium oxide-based polishing powder and a preparation method thereof, a polishing solution and application, the cerium oxide-based polishing powder comprises porous secondary particles assembled by a plurality of primary crystal grains, the primary crystal grain aperture is 2-30 nm, the pore volume is 0.10-0.50 cm < 3 > / g, the specific surface area is 10-80 m < 2 > / g, and the content of surface trivalent cerium accounts for 10-40% of the total surface cerium content. The microstructure of the cerium oxide-based polishing powder is porous cerium oxide-based particles assembled by nano primary particles, and the self-assembly structure enables the cerium oxide-based polishing powder to have higher specific surface area while having higher surface trivalent cerium content, so that higher polishing rate can be obtained; due to the submicron particle size, the dispersity of the polishing slurry is improved; the Young modulus of the polishing powder is reduced due to the porous structure, so that the polishing powder is not easy to break in the polishing process, the surface precision of a polished workpiece is improved, and the service life of the polishing powder is prolonged. Therefore, the cerium oxide-based polishing powder provided by the invention has excellent polishing rate and polishing precision at the same time, and has relatively long service life.

The invention relates to an ultra-precision grinding and photochemical mechanical polishing combined process for a laser crystal sheet. Comprising the following steps that coarse grinding is conducted through a coarse-grained grinding wheel, rapid thinning is achieved, the depth of a subsurface damaged layer is determined, and reference is provided for the grinding wheel feeding amount in the accurate grinding stage; a fine-grained grinding wheel is adopted for accurate grinding, a damaged layer introduced in the coarse grinding stage is removed, and high surface / subsurface quality and surface precision are obtained by optimizing technological parameters; a special polishing solution for photochemical mechanical polishing is prepared from an aluminum oxide (Al2O3) grinding material, semi-fine polishing is carried out on a laser crystal sheet, and surface damage caused in the grinding stage is rapidly removed; a special polishing solution for photochemical mechanical polishing is prepared from a zirconium oxide (ZrO2) grinding material, and the laser crystal sheet is finely polished, so that the surface quality and the surface precision are further optimized; an ultrasonic cleaning instrument is adopted to clean the laser crystal slice, and a cleaning agent is absolute ethyl alcohol. According to the invention, high-surface integrity and high-efficiency processing of the laser crystal slice can be synchronously realized.

The invention discloses a weak-rigidity free-form surface monocrystalline silicon reflecting lens and a processing method thereof. The method comprises the following steps: obtaining a monocrystalline silicon block; cutting into blocks; diamond wire cutting; precisely grinding the back surface; performing slicing; the free-form surface sucker adsorbs the lens; precisely grinding the front surface into a cylindrical surface; polishing the magnetorheological elastomer; releasing the lens; the cylindrical sucker adsorbs the lens; precisely grinding and thinning the back surface; releasing the lens; cutting edges and carrying out wet etching on the back surface; and carrying out ion beam modification processing to achieve the final surface shape precision of the free-form surface. According to the X-ray reflecting lens machining method, the free-form surface weak-rigidity reflecting mirror is clamped and deformed into the cylindrical surface for machining, the whole process is ultra-precision grinding and polishing of the cylindrical surface, the machining method is simple and mature, the manufacturing cost is extremely low, dependence on an ultra-high-precision multi-axis linkage machine tool is completely eliminated, and the machining precision is greatly improved. And the machining efficiency is greatly improved, and the method is suitable for mass production of reflectors.

The invention belongs to the technical field of robot automatic force control polishing of optical elements, and particularly discloses a robot polishing force speed planning method and system considering the surface shape precision and the machining efficiency of the optical elements. The method comprises the steps that based on the Preston theory, a material removal model of the small grinding head polishing device is established; acquiring surface shape data of a detection point of the optical element, and planning a polishing path of the optical element in an off-line manner; discrete cutter points are fitted, a parameterized position curve is obtained, points are taken uniformly to obtain surface shape optimization resident points, and a unit material removal matrix is established in combination with a material removal model; and constructing a first-step optimization model and a second-step optimization model, and obtaining the optimized contact force and feed speed. According to the invention, optimization of contact force and feeding speed during optical element processing can be realized, and high-quality optical elements can be obtained with high efficiency.

The invention discloses a method for manufacturing an aspheric fused quartz optical element, which comprises the following steps of: S1, carrying out ultra-precision grinding on the aspheric fused quartz optical element to ensure that the surface shape error and the surface roughness of the ground surface meet the requirements; s2, performing magneto-rheological polishing and shaping on the aspheric fused quartz optical element; s3, the surface shape precision of the aspheric fused quartz optical element is detected, if the detection result meets the requirement, the step S4 is executed, and if the detection result does not meet the requirement, the step S2 is executed again; s4, the aspheric fused quartz optical element is subjected to fairing polishing; and S5, detecting the front shape of the transmitted wavefront of the aspheric fused quartz optical element, filtering the intermediate frequency band, then performing power spectral density analysis, if the intermediate-high frequency error meets the requirement, completing the processing, and if the intermediate-high frequency error does not meet the requirement, returning to the step S4. The method has the advantages of high precision, high efficiency, low damage, low cost and the like.

The invention relates to the technical field of polarizing beam splitters, in particular to a polarizing beam splitter and a preparation method and application thereof. The polarizing beam splitter provided by the invention comprises a diamond substrate, a polarizing beam splitting film and a first metalized film layer which are positioned on the surface of one side of the diamond substrate, a broadband antireflection film positioned on the surface of the other side of the diamond substrate, and a second metalized film layer positioned on the side surface of the diamond substrate, the first metallized film layer is located at the edge position of the surface of one side of the diamond substrate. Diamond is adopted as a substrate material of the polarizing beam splitter, and the characteristic of high thermal conductivity of the diamond is utilized, so that heat generated when laser acts on a film layer and a substrate can be quickly conducted as soon as possible, and damage to the polarizing beam splitter caused by local temperature rise is relieved; the edge of the polarizing beam splitter is metalized, so that the beam splitter body and a metal tube shell or a water cooling structure can be integrally welded, and a high-reliability and low-leakage-rate vacuum sealing solution can be provided while the heat conduction efficiency is improved.

The invention discloses a multi-energy-field auxiliary multi-phase jet flow polishing method and device for a miniature bearing, and the method comprises the steps that a plurality of bearing inner rings are clamped into a workpiece clamp, the center lines of all the bearing inner rings coincide after clamping, and the inner circle faces of the adjacent bearing inner rings are sequentially connected to form an inner circle face set with the two ends open; the spatial position of the inner circular surface group is determined, the position of the jet device is adjusted based on the spatial position and the divergence angle range of jet flow of the jet device, the center line of a jet flow nozzle of the jet device coincides with the center line of the inner circular surface group, and sprayed jet flow can cover the whole inner circular surface group; through the synergistic effect of multiple energy fields, stress-scratch-free efficient low-damage polishing machining can be conducted on multiple complex inner ring structures at the same time, tool marks and burrs generated after machining are effectively removed, the polishing quality and efficiency of high-end spaceflight parts are greatly improved, and the polishing quality and efficiency of the high-end spaceflight parts are improved. And the development of advanced manufacturing technologies of major equipment such as aviation and spaceflight in China can be effectively supported.

The invention discloses an injection molding device with a circulating cooling function, and relates to the technical field of injection molding devices.The injection molding device comprises a feeding mechanism, an injection molding mechanism, a transmission mechanism and a temperature control mechanism, the feeding mechanism and the injection molding mechanism are connected in a fastened mode, the transmission mechanism and the injection molding mechanism are connected in a fastened mode, and the temperature control mechanism and the injection molding mechanism are connected in a fastened mode; the temperature control mechanism is communicated with the feeding mechanism, the feeding mechanism is communicated with the injection molding mechanism, the temperature control mechanism is in fastening connection with the injection molding mechanism, the temperature control mechanism is communicated with the injection molding mechanism, the transmission mechanism is in fastening connection with the injection molding mechanism, opening, closing and injection molding actions of the injection molding mechanism are driven by the transmission mechanism, and the temperature control mechanism is in fastening connection with the injection molding mechanism. The temperature control mechanism adjusts the temperature of the injection molding mechanism and the temperature of the feeding mechanism, and raw materials enter the injection molding mechanism through the feeding mechanism and are heated and plasticized under the action of the temperature control mechanism.

The present invention provides an automated pipe processing device, comprising: a material unloading mechanism for transferring pipes to a conveying mechanism; a conveying mechanism for conveying pipes; a grinding mechanism for grinding the ends of the pipes conveyed by the conveying mechanism; and a cleaning mechanism for cleaning the dust on the inner wall of the pipes. The present invention can sequentially unload, convey, grind the ends of the pipes, and clean the dust on the inner wall of the pipes. After the pipes are processed, the length dimensions are more accurate, and the ends have a higher surface accuracy. At the same time, the inner wall of the pipes is not easy to adhere to dust.

The utility model discloses an automatic processing clamping device of adaptation to multiple size workpieces, including base, two groups of clamping mechanism of symmetrical setting on base, drive mechanism and adjusting mechanism for adjusting the initial interval of clamping mechanism that drive clamping mechanism relative close or far apart, still be equipped with horizontal guide rail on the base, two groups clamping mechanism are slidably connected in the both ends of horizontal guide rail respectively, clamping mechanism includes sliding seat, clamping jaw subassembly and be equipped with the elastic buffer pad in the one side of sliding seat. Can take into account multiple size adaptability, high accuracy positioning, stable clamping and the novel clamping device of automation control, to solve the technical problems such as the adjustment of existing technology complicated, poor universality, clamping reliability is low, satisfy modern automation processing to the demand of high efficiency, precision, stability.

This invention relates to a method for controlling the deformation of thin-walled, weakly rigid parts manufactured by additive manufacturing during thermal spraying. Belonging to the field of thermal spraying technology, it solves the technical problem of deformation occurring during the thermal spraying coating preparation process of thin-walled, weakly rigid parts with large residual stress, affecting assembly. The method for controlling the deformation of thin-walled, weakly rigid parts manufactured by additive manufacturing during thermal spraying includes the following steps: S1, detecting and processing the residual stress of the part; S2, designing and processing a thermal spraying shaping fixture; S3, assembling the fixture and part and then sandblasting; S4, performing stress-relief annealing on the part; S5, performing vibration aging stress relief on the part; S6, conducting a second residual stress detection and data processing on the part, and then calculating the residual stress change rate; S7, assembling the fixture and part and then performing plasma spraying; and S8, post-treatment after plasma spraying. This invention improves the surface accuracy of the part after plasma spraying and avoids assembly step differences.

The utility model discloses a lens processing fixing device, including the bottom plate, the bottom plate is fixedly connected with the support, the support rotationally connected with the rotation cover, the rotation cover is fixedly connected with the support block, the support block rotationally connected with two rotators, the support is fixedly connected with the motor, the output shaft of motor is fixedly connected with the gear no.

The application relates to the technical field of glass, in particular to a manufacturing method, system and application of heat-bending-free 3D cover plate glass. The method utilizes laser to construct an induced prestress field on a glass substrate to release 50%-85% of target strain; then, single-side polishing fine adjustment is carried out, the polishing surface to be polished is divided into a center, an edge and a corner area, and stepped pressure is applied to compensate for the removal rate difference; a pressure buffer zone is dynamically generated at the junction of the areas, and the pressure is adjusted based on a smoothing algorithm to ensure that the first and second derivatives are continuous and the step mutation is eliminated. Through light-mechanical coupling stress regulation and dynamic continuous control, the application completely eliminates edge collapse and vibration marks, realizes micron-level curvature shaping, improves the glass surface type precision, optical uniformity and structural strength, and efficiently manufactures high-quality 3D cover plates without high-temperature heat bending.

The invention relates to a plate flanging forming method based on a convex magnetic collector, which comprises the following steps of: determining parameters of a driving coil according to a plate forming specification, selecting a corresponding wire rod and a corresponding wire diameter, and winding the driving coil through a winding machine; determining the material and size parameters of the convex magnetic collector; manufacturing a convex magnetic collector; after the to-be-formed plate is subjected to annealing pretreatment, the middle of the to-be-formed plate is fixed through a mold; a convex magnetic collector is arranged in the opposite direction of a flanging area of a to-be-formed plate, a protrusion of the convex magnetic collector is aligned with the middle of the flanging area of the to-be-formed plate, and a driving coil is arranged at the bottom of the convex magnetic collector and connected with a pulse power source through a switch. And supplying power to the driving coil, controlling the discharge time of the pulse power supply, and flanging the to-be-formed plate. The magnetic field distribution of the flanging area of the plate is improved through the convex magnetic collector, the flatness and the uniformity of the formed flanging area of the plate are improved, and the problem that the flanging buckling phenomenon of the plate is caused by non-uniform electromagnetic force distribution due to the end effect is solved.

A machining method of a large-caliber high-precision infrared aspheric optical imaging lens comprises the steps that S1, according to a design drawing, rough machining is conducted on the double-face contour and the outer circle datum of a lens blank through a milling and grinding machine, and the center thickness allowance is reserved; s2, by taking the excircle and the convex / concave platform of the lens as a reference, mounting the lens on a spindle of a single-point diamond lathe, performing primary turning on the surface type of the excircle and the concave / convex surface of the lens to enable the cylindricity of the excircle to be superior to 0.005 mu m, and after the primary turning of the surface type is completed, testing the surface type by adopting a contourgraph and performing compensation turning according to the error of the surface type; s3, turning by taking the outer circle of the lens and the concave surface / convex surface platform as the positioning reference, and turning the convex surface / concave surface type in the same way as that in the S2; s4, performing uniform and non-eccentric smooth polishing on the surface type of the lens until the turning subsurface damage is completely removed; and S5, installing the lens structural member, re-testing the surface shape, and carrying out magneto-rheological fine polishing.

The utility model provides a sand mold for a vacuum pump shell casting. The sand mold for the vacuum pump shell casting comprises a sand core integrally formed through 3D printing, the interior of the sand core is hollow, the positions, close to the two ends, of the sand core are sealed, through holes are formed in the sealing positions of the sand core, and the through holes in the two ends of the sand core are located on the same line in a one-to-one correspondence mode; the two ends of the core bar are located outside the sealing position of the sand core and connected with limiting workpieces. According to the utility model, the original split type sand core combination mode is changed into the 3D printing integral sand core, so that the combination is not needed, and the matching error is reduced; the surface precision of the 3D printing sand core is higher than that of a resin sand molding sand core, and the smoothness of the inner surface of the shell can be greatly guaranteed; the interior of the sand core is of a hollow structure, use of sand is reduced, cost is reduced, and meanwhile the core bars are added in the sand core for supporting, so that the sand core is not prone to damage.

The present application relates to the technical field of optical glass manufacturing, and discloses an optical glass mold pressing forming method based on multi-zone non-isothermal gradient heating. The method divides the heating system of the mold pressing forming area into multiple independent temperature control zones, actively constructs a preset non-isothermal gradient temperature field that is geometrically suitable for the component before pressure forming, and guides the viscosity distribution of the glass material. In the pressure forming process, the temperature data of each temperature zone are collected in real time and compared with the dynamic target gradient, the heating power is adjusted based on the deviation closed loop, the actual temperature field intelligently follows the preset gradient, and the material flow filling is optimized. After forming, a gradient annealing cooling program with partition differentiation is executed, different cooling rates are set according to the thickness or stress risk of the region, and the internal stress is sequentially released. The present application actively and accurately regulates and controls the temperature field in the whole forming process, can effectively improve the surface shape precision of the optical component, reduce the residual stress and improve the surface quality.

This invention discloses a grinding wheel dressing method for machining cycloidal gears using a worm gear grinding machine. The key feature is the use of a worm gear grinding machine that integrates cycloidal gear machining and grinding wheel dressing functions to achieve rapid and precise grinding wheel dressing. The worm gear grinding machine, with an adjustable central axis swivel angle for the dresser, increases the dresser's freedom of movement during dressing, reducing the impact of changes in the grinding wheel tooth profile, controlling errors during dressing, and improving machine tool stability. A contact vibration sensor is installed on the grinding wheel; by sensing vibration data, the machine tool automatically adjusts the dresser's alignment, simplifying manual operation, improving dressing accuracy, and saving time. After the initial alignment, the dresser does not need to be aligned again, improving dressing efficiency. By differentiating the two-stage machining process of dressing the grinding wheel, the roughing stage quickly removes excess material from the grinding wheel while the finishing stage maintains a good surface morphology.

The application relates to the field of additive manufacturing technology, in particular to a 3D printing high-strength and high-toughness aluminum alloy powder, an alloy component and a preparation method thereof. The 3D printing high-strength and high-toughness aluminum alloy powder comprises, in percentage by mass, Zn 5-8%, Mg 2-4%, Cu 1-2%, Ti 0.3-4%, Cr 0.1-0.3%, Mn 0.65-2% and C 0.01-0.3%, and the balance is Al and inevitable impurities. The application controls the content and proportion of Zn, Mg, Cu, Ti, Cr, Mn and C in the alloy, adjusts and controls the solidification behavior in the additive manufacturing process, obtains fine equiaxed crystals, has a large number of dispersed distribution precipitates, and can effectively improve the compactness, strength, crack propagation resistance and the like of the alloy.

The present invention relates to a cutting force compensation processing method of a fast tool servo system based on adaptive control, belonging to the technical field of ultra-precision processing. The method first establishes an electromechanical model for the fast tool servo system, establishes and sets an adaptive robust control algorithm based on the electromechanical model, then performs a plane turning experiment on the cuttable material to fit the relationship between the cutting force and the cutting area in the turning process, then calculates the ideal cutting area of ​​each cut in the cutting process, and calculates the cutting force, and writes the cutting force into the adaptive robust control algorithm as a new feedforward signal to obtain an adaptive robust control algorithm for feedforward compensation, and finally drives the fast tool to cut using the adaptive robust control algorithm for cutting force feedforward compensation. The method can compensate for the external disturbance of the cutting force in the cutting process, can effectively reduce the surface shape error of the processed surface, and improve the surface shape accuracy.

The invention relates to the technical field of ultrasonic honing, in particular to a full-automatic spherical precise ultrasonic honing method and system based on resonant frequency simulation, and the method comprises the steps: receiving an ultrasonic honing instruction, starting an ultrasonic honing system, defining motion constraint, free constraint and excitation conditions, setting a honing transducer, a honing tool rod and a spherical honing head, and establishing a simulation model. The method comprises the steps of setting a simulation range and a honing workpiece, executing modal analysis to obtain a simulation modal set, extracting a resonant frequency set and a resonant vibration mode set, drawing a modal heat map, screening an optimal frequency mode, scanning feature points of the workpiece, moving the honing workpiece to a honing position and calculating the offset of the workpiece, executing precise ultrasonic honing and detecting the real-time offset. And the real-time offset is adjusted, the shape error is calculated, the adjusting pressure is calculated based on the shape error, and full-automatic spherical precise ultrasonic honing is completed. The automatic degree and honing precision of full-automatic spherical ultrasonic honing can be improved.

This utility model discloses a turnover device for automobile bearing production, including a trailer with movable wheels on its bottom surface and a turnover box fixedly connected to its top surface. A box door is hinged to the outside of the turnover box, and a positioning plate is slidably connected inside the box door. Multiple equidistant cross grooves are formed in the positioning plate. Multiple equidistant hollow shafts are threaded inside the turnover box. Two arc-shaped blocks are symmetrically slidably connected to the outer edge of each hollow shaft. A stop block is fixedly connected to the end of each hollow shaft, and a cross block adapted to the cross groove is fixedly connected to the end of the stop block.

The invention belongs to the technical field of glass forming, and particularly relates to a precise forming method of a large-size thin-wall glass concave mirror, which comprises the following steps: (1) placing a circular glass substrate on a concave cavity mold in a heating chamber; (2) setting the heating temperature, the temperature rising time, the constant temperature control, the constant temperature time and the cooling time of the heating chamber; starting a power supply, heating to a glass softening point of the round glass substrate through a program, and carrying out constant temperature control when the round glass substrate begins to move downwards; and (3) ending constant temperature, starting a vacuum pump, carrying out negative pressure operation on the interior of the cavity of the concave cavity mold, closing the heating power supply and cooling the heating chamber when the circular glass substrate is in a fit state with the concave surface of the concave cavity mold. The method has the characteristics of simple machining process, low cost, high surface shape precision, high machining efficiency and the like.

The invention provides a fuselage component of a wind tunnel dynamic test aircraft model and a manufacturing method thereof, relates to the technical field of wind tunnel aircraft models, and solves the technical problem in the prior art that the fuselage component of a wind tunnel aircraft model adopts a traditional fuselage structure, which affects the accuracy of experimental data due to its heavy weight. The fuselage component of the wind tunnel dynamic test aircraft model comprises a load-bearing frame, an air intake pipe and a skin, wherein the load-bearing frame is arranged as a truss structure; a first mounting portion is arranged on the load-bearing frame, and the air intake pipe is fixedly connected to the first mounting portion; the skin is wrapped around the load-bearing frame and the air intake pipe, and a lip is detachably arranged at the air intake end of the air intake pipe, and the lip is arranged outside the skin; the invention adopts a skin-frame structure as a whole, effectively reduces the overall weight of the fuselage component, thereby significantly reducing the test oscillation inertia, increasing the natural frequency, alleviating the requirement for the structural rigidity of the test device, and greatly improving the accuracy of the experimental data.

The invention provides a release-film-free rapid photocuring 3D printing method. The release-film-free rapid photocuring 3D printing method comprises the following steps that photosensitive resin is added into a resin trough; the printing chamber is inversely buckled and fixed in the resin trough, so that a liquid level difference is generated between the liquid level in the printing chamber and the liquid level in the resin trough, and a positive pressure or negative pressure air environment is formed in the printing chamber; setting printing parameters of the three-dimensional model through slicing software, and importing the printing parameters into a control system; patterns displayed on a display screen of a projection device are exposed and cured at the liquid level of a printing cavity layer by layer through a control system, after exposure of each layer is completed, the control system controls a servo motor to drive a lifting module to act, and then a printing platform is driven to descend by the distance of one layer thickness; the liquid level in the printing cavity is fast and stable, the steps are repeated, and exposure curing of the next layer is carried out until printing forming of the model is completed; and the formed model on the printing platform is taken out, and residual resin on the surface is cleaned through ultrasonic treatment. According to the release-film-free rapid photocuring 3D printing method, in the 3D printing process, the liquid level can be rapidly stabilized, no bubble is generated, and the 3D printing efficiency and the product surface precision are remarkably improved. The invention further provides a release-film-free rapid photocuring 3D printing device.

The invention provides a 3D printing resin composition for jewelry investment casting and a preparation method and application thereof, and relates to the technical field of 3D printing materials, the 3D printing resin composition comprises the following components: a monofunctional acrylate resin monomer, oxidized graft modified petroleum wax and an ethylene-vinyl acetate copolymer, and optionally a photoinitiator, a rheology modifier, and an ultraviolet absorber; according to the 3D printing resin composition for jewelry investment casting, the mechanical strength and the surface precision are improved, and the technical problems that a traditional pure wax system is insufficient in mechanical property and poor in surface smoothness are solved.

The invention relates to the technical field of gear machining, in particular to a grinding process capable of improving tooth surface waviness, which comprises the following steps of: S1, roughly cutting a gear by using a milling cutter lathe, and removing redundant materials of the gear to enable the gear to form a specified shape; s2, the gear is cleaned, and the cleaned gear is subjected to drying treatment; s3, grinding equipment is used for conducting high-precision grinding and polishing on the gear; s4, the gear ground and polished by the grinding equipment is discharged, and precision detection is conducted on the gear; and S5, anti-oxidation liquid spraying is conducted on the surface of the gear obtained after precision detection is completed. When the first electric sliding block and the grinding cutter move, the multiple gears are sequentially ground at different degrees and different angles at the same time.

The invention discloses an additive manufacturing method and device based on blue light-optical fiber composite laser. The method comprises the steps that a substrate with an additive face is provided; an additive light spot and a preheating light spot which are sequentially distributed in the additive direction are formed on the additive face of the substrate, the additive light spot comprises a blue light spot and an optical fiber laser light spot which are compounded, the blue light spot is round or annular, and the optical fiber laser light spot is round or annular; and the material adding light spot and the preheating light spot are controlled to move in the material adding direction, the preheating light spot heats the material adding face, the material adding light spot melts the welding wire to conduct directional layer-by-layer deposition so as to form a copper or copper alloy blank, and the welding wire is made of copper or copper alloy. The substrate or the deposition body is preheated through the preheating light spot, so that the deposition body is kept at a proper interlayer temperature, the welding wire is molten by adopting blue light-optical fiber composite laser, the absorption rate of the welding wire containing copper or copper alloy to a laser heat source is improved, the melting efficiency of the welding wire is higher, the energy loss is reduced, and the additive efficiency of copper and copper alloy is improved.

The application discloses a high-precision-low-bounce permanent magnet small ball end polishing head processing method based on small-diameter ball head grinding and shape correction, and relates to the technical field of ultra-precision machining. The application is used to solve the problem that the radial bounce of the existing permanent magnet small ball end polishing head is too large in the magnetorheological polishing process, which leads to unstable material removal rate and influences the machining precision and surface quality. The application comprises the following steps: S1, clamping the permanent magnet half-ball end polishing head to the workpiece spindle of a grinding machine, and measuring the bounce of the permanent magnet half-ball end polishing head in a rotating state; S2, clamping the ball head grinding wheel to the tool spindle of the machine, and performing tool measurement by using the ball head grinding wheel; S3, drawing the two-dimensional profile of the permanent magnet half-ball end polishing head, and constructing the machining path of the grinding wheel according to the two-dimensional profile and the measured bounce of the permanent magnet half-ball end polishing head; and S4, performing grinding and shape correction on the permanent magnet half-ball end polishing head. The application can remove the shape error generated in the sintering process of the half-ball end permanent magnet, and further improves the polishing precision.

The foldable projector lamp structurally comprises a rotating shaft connecting block, a bearing block, a limiting body, a heat dissipation pipe and a lamp body, the rotating shaft connecting block is fixed to the lower end of the bearing block, the center of the surface layer of the bearing block coincides with the circle center of the limiting body, and the heat dissipation pipe is perpendicularly arranged at the upper end of the bearing block through the limiting body; the lamp body is embedded in the inner layer area of the heat dissipation pipe and fixedly connected with the inner layer area. After a bearing block is further improved, an overturning piece and a rotator of an insulator can be controlled on line under adaptation of a signal receiving box, so that the overturning piece completes adjustment of the position of a baffle through overturning, meanwhile, the rotator rotates forwards and backwards, and the length of a heat dissipation pipe and the length of a lamp body can be controlled through a screw; therefore, the spotlight can be folded, the defect that the center of the spotlight body deviates due to mismatched positions is overcome, and meanwhile, the storage convenience of the follow-up spotlight can be improved and the control convenience during film and television shooting can be improved by reducing the size of the whole spotlight through folding.