21results about How to "Improve surface accuracy" patented technology

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 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 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.

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 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.

The invention discloses a composite polishing machine tool and a polishing method thereof. The composite polishing machine tool comprises a base, a transmission mechanism, a working shaft, a finishing shaft and a rotary table. The transmission mechanism is arranged on the base; the working shaft is arranged on the transmission mechanism; a clamping assembly capable of rotating in the Z direction is arranged on the working shaft. The finishing shaft is arranged on the transmission mechanism and provided with a milling cutter, a turning tool and a grinding head capable of rotating around the Z-direction axis. The rotary table is arranged on the base and comprises a base, a rotating mechanism, a heating table and a polishing disc. The rotating mechanism is arranged on the base, the heating table is arranged on the rotating mechanism, the rotating mechanism drives the heating table to rotate around the Z-direction axis, the heating table is connected with a heating assembly, the polishing disc is arranged at the top of the heating table, the heating assembly is used for heating the polishing disc, and a polishing pad is arranged at the top of the polishing disc and used for making contact with the polished surface of a workpiece. The machine tool integrates the functions of polishing machining, polishing pad finishing and temperature control deformation compensation, the surface shape precision of a workpiece is effectively improved, and the machining requirement of ultra-precision polishing is met.

The application discloses a preparation method of a CuCr40-60 electric contact and the electric contact, and the preparation method comprises the following steps: weighing cathode copper and metal chromium particles as raw materials; loading the weighed raw materials into a vacuum induction furnace and adopting a segmented heating mode to perform smelting; obtaining CuCr alloy powder by performing atomization and powdering treatment on the melt; sequentially performing grading, vacuum drying and deoxidation treatment on the CuCr alloy powder to obtain CuCr40-60 pre-alloy powder; performing 3D printing on the CuCr40-60 pre-alloy powder to obtain an electric contact blank; and performing vacuum heat treatment and grinding and polishing treatment on the electric contact blank to obtain the CuCr40-60 electric contact. The application solves the problems of chromium phase segregation, high oxygen content, poor sphericity and difficulty in meeting the 3D printing requirements when the CuCr40-60 pre-alloy powder is prepared by using a conventional powdering process, and the CuCr40-60 electric contact prepared by the application has the comprehensive advantages of high compactness, low oxygen content, superfine dispersed chromium phase and excellent surface precision.

This application relates to a stitch structure and sewing method for splicing multiple pieces of warp-knitted metal mesh, and pertains to the field of application technology of medium and large-sized metal mesh for satellite antenna reflector surfaces. The method for splicing and sewing warp-knitted metal mesh includes: S1, providing at least two pieces of warp-knitted metal mesh to be spliced; S2, overlapping the edges of adjacent pieces of mesh with a width of 1-1.5cm to form an overlap area; S3, using polyimide or aramid filaments with a specification of 200-600D as sewing thread, and sewing along the overlap area using sewing equipment, wherein the stitch spacing is 0.8-1.2cm and the stitch density is 3-5 stitches / cm. This application improves surface accuracy by using an overlap width of 1-1.5cm and automated parameter control for sewing, a stitch length of 0.8-1.2cm, a density of 3-5 stitches / cm, and high-performance polyimide or aramid thread of 200-600D. This effectively avoids the problems of easy aging and embrittlement of traditional polyester thread or webbing, and improves long-term stability.

The present application relates to the technical field of polishing pressure control, in particular to a polishing head pressure control method and system for a polishing machine, which comprises calculating the contact area by using a curvature adaptive algorithm, generating a basic pressure sequence; estimating the real-time friction coefficient by monitoring the motor current, and stripping the friction interference in combination with the geometric coupling factor to correct the pressure sequence in reverse; introducing multi-step residual prediction control to construct an autoregressive model to predict the future pressure deviation and generate an inhibition sequence to control the polishing head feed. The present application establishes a dynamic mapping between the contact area and the target pressure by using the curvature adaptive algorithm, ensuring uniform pressure on complex curved surfaces; the nonlinear friction interference algorithm is used to eliminate coupling errors and prevent the controller from misjudging; the residual prediction control is introduced to overcome system lag and achieve advanced suppression of pressure fluctuations, significantly improving the polishing robustness and surface quality.

This invention belongs to the field of additive manufacturing of metal materials, specifically relating to a photocurable metal component and its preparation method. The method for preparing the photocurable metal component includes the following steps: (1) photocuring and 3D printing a stainless steel slurry to obtain a metal blank; (2) thermally degreasing the metal blank to obtain a thermally degreased metal blank; (3) vacuum sintering the thermally degreased metal blank to obtain the photocurable metal component. In step (1), the stainless steel slurry comprises a stainless steel alloy, a photosensitive resin, a photoinitiator, and a dispersant; the photosensitive resin comprises 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2,2-dimethylpropyl diacrylate, 2-hydroxyethyl methacrylate phosphate, and trimethylolpropane triacrylate. This invention combines photocurable molding technology with powder metallurgy technology, which can maintain the mechanical properties and density of the material, and also maintain high surface precision when forming complex parts.

The bending device includes a gravity bending furnace, carriers, a conveyor, an upper mold, a first lifting mechanism, a lower mold, a second lifting mechanism, and a sliding mechanism. The furnace defines a pressing zone and a retracting zone therein. Each carrier includes a ring mold that supports the peripheral edge of a glass plate from below. The second lifting mechanism attaches and detaches the carrier to and from the conveyor in the retracting zone, and lifts and lowers the carrier detached from the conveyor in the retracting zone. The slide mechanism attaches and detaches the carrier to and from the conveyor in the pressing zone, and slides the carrier detached from the conveyor between the pressing zone and the retracting zone. The upper surface of the lower mold supports the entire lower surface of the glass plate when the upper mold presses the glass plate from above.

The invention relates to the technical field of optical thin films, in particular to a low-phase-difference metal reflecting mirror suitable for a space environment and a preparation method and application of the low-phase-difference metal reflecting mirror. The bonding layer, the metal layer, the first protective layer, the first low-refractive-index layer, the high-refractive-index layer, the second low-refractive-index layer and the second protective layer are sequentially plated on the optical substrate; the optical substrate is made of silicon; the bonding layer is made of nickel-chromium; the metal layer is made of silver; the first protective layer and the second protective layer are made of aluminum oxide; the first low-refractive-index layer is made of silicon dioxide, and the second low-refractive-index layer is made of silicon dioxide; and the high refractive index layer is made of niobium pentoxide. High reflectivity in a broadband range is realized through the metal layer, phase difference regulation and control design is performed by using an asymmetric equivalent layer theory in an optical thin film design method, phase difference regulation and control of a communication waveband are realized, and adaptability and stability of an optical element under a space environment condition are improved by using the outermost protective layer.

The embodiment of the invention provides steam cavity filling equipment, preparation of a cavity shell and a steam cavity filling method. In one specific embodiment, the equipment comprises a filling body, an inert gas bottle, vacuumizing heating equipment, a first heating device and a cooling device, an inflation channel and a to-be-inflated material storage cavity communicated with the inflation channel are formed in the inflation body; the to-be-filled material storage cavity is used for storing alkali metal materials; one end of the inflation channel comprises a plurality of connecting ports used for being connected with the cavity shell, and the other end of the inflation channel is communicated with an inert gas bottle and vacuumizing heating equipment used for conducting vacuumizing and heating exhaust on the inflation channel and the steam cavity of the cavity shell. A first valve is arranged between the inert protective gas bottle and the filling body; a second valve is arranged between the vacuumizing equipment and the filling body; the first heating device is used for heating the to-be-filled material storage cavity; the cooling device is used for cooling the cavity shell; the filling equipment further comprises a plurality of sealing plugs used for sealing the connecting openings.

This application relates to a multimodal adaptive aspherical lens polishing surface control method, aiming to solve the problems of over-polishing and under-polishing caused by the inability of existing technologies to adapt stiffness and vibration parameters according to the curvature zones of the lens. First, the surface curvature distribution data of the lens to be polished is obtained to identify the locations of high and low curvature regions. A polishing disk rotating around an axis is provided, with Ni-Ti based shape memory alloy wires embedded in an array within its elastic matrix, and several piezoelectric ceramic ultrasonic vibrators are embedded within it. Differential currents are applied to the alloy wires in different regions according to the curvature data, and the stiffness of the corresponding regions of the polishing disk is adjusted through a martensitic-austenitic phase transformation, with low stiffness adapted to high curvature regions and high stiffness adapted to low curvature regions. During polishing, the ultrasonic vibrators are synchronously controlled to output vibration parameters matching the curvature regions, achieving multimodal coupled polishing. This method effectively avoids over-polishing and under-polishing defects, balancing processing accuracy and efficiency, and meeting the requirements of high-end fields for nanometer-level surface accuracy of aspherical lenses.

The invention discloses a light beam space angle positioning method and device, and relates to the technical field of laser application. The light beam space angle positioning method comprises the steps that a light beam space angle device is placed at the intersection point of at least two intersecting light beams, the light beam space angle device comprises an adjusting assembly and a plane mirror arranged on the adjusting assembly, the adjusting assembly drives a reflecting surface to rotate, and the intersection point is located on the reflecting surface; the adjusting assembly is controlled to move to drive the plane mirror to rotate, so that the first light beam vertically enters the reflecting surface, and at the moment, the position information of the adjusting assembly is first position information; the adjusting assembly is controlled to move to drive the plane mirror to rotate, so that the second light beam vertically enters the reflecting surface, and at the moment, the position information of the adjusting assembly is second position information; and determining an included angle between the first light beam and the second light beam according to the first position information and the second position information. According to the light beam space angle positioning method and device, the structure and operation can be simplified while the precision is improved.

The present application relates to the technical field of tool structure data prediction, and particularly relates to a tool structure data prediction method, device, equipment and storage medium, the method firstly constructs a data sample library for training, performs a simulation operation based on the data sample library to construct a training sample set, performs multi-round iteration training on an initial index prediction model by using the training sample set, calls a target index prediction model to respectively predict machining key indexes of each group of tool structure data to be predicted, obtains an index data group corresponding to each group of tool structure data to be predicted, obtains an initial tool structure data group based on multiple groups of tool structure data to be predicted, adopts a genetic algorithm, and performs multi-round iteration update on the initial tool structure data group based on the multiple groups of tool structure data to be predicted and multiple groups of index data, and when a preset iteration stop condition is met, an optimized tool structure data group is obtained, aiming at accurately predicting key physical quantities of tool structure.

This invention relates to the field of CNC machining technology, specifically to a CNC cutting path optimization method and system based on quantum computing. The optimization method includes the following steps: obtaining a three-dimensional geometric model of the target workpiece and a set of cutting process parameters, including tool diameter, feed rate, depth of cut, and material removal rate threshold. A multi-objective optimization model is constructed with the objectives of minimizing the total path length, maximizing tool load balance, and minimizing idle travel time. This invention, by constructing a quantum-classical coupled multi-objective optimization model, maps the spatial correlation of cutting path points to the entanglement strength between qubits, and utilizes the parallel tunneling capability of a quantum annealing processor to overcome the dimensionality curse limitation of traditional optimization algorithms.