191results about How to "High structural precision" patented technology

For supporting a cylindrical photosensitive drum, a high-precision high-strength supporting apparatus is disclosed to include a sleeve member and a shalt member. The sleeve member has an outer wall for attaching to the photosensitive drum, an inner wall within which an axial hole is defined, a first retaining portion positioned at the inner wall, and four locating ribs disposed inside the axial hole. The shaft member has an outer tube inserted into the axial hole of the sleeve member, a second retaining portion provided on the outer tube and engaged with the first retaining portion of the sleeve member, a connecting portion inwardly extending from the outer tube, an inner tube disposed at an inner end of the connecting portion, and four locating slot provided on the inner tube and engaged with the locating rib of the sleeve member.

The invention discloses a continuous lens automatic grinding method. A feeding position, a discharging position and a material placing and collecting position are circularly and uniformly distributedon a horizontal rotary disk with the center of the rotary disk as the center. The one-off lens processing circulating process comprises the steps of overlapping and placing corresponding lenses into the material placing and collecting position; controlling the rotary disk to horizontally rotate by 120 degrees to switch the material placing and collecting position to the feeding position; taking out the lenses on the uppermost portion one by one, and clamping and conveying the lenses to a corresponding processing part structure to conduct grinding processing; clamping and conveying the ground and processed lenses to the discharging position to conduct overlapping in sequence; taking out the previous cycle of the lenses from the material placing and collecting position and placing the next cycle of the lenses into the material placing and collecting position in the lens grinding process; controlling the rotary disk to continue rotating by 120 degrees after completion of grinding of all the lenses during one-off cycle to rotate and switch the overlapped ground lenses from the discharging position to the material placing and collecting position and then taking out the lenses to complete the cycle. The continuous lens automatic grinding method has the advantage that the processing efficiency of the lenses can be improved.

The invention discloses a preparation method of a foamed aluminum and alloy sandwich plate, which is characterized by comprising the following steps: (1) coating: selecting an aluminum and alloy panel, and compressing the aluminum and alloy panel and foaming powder to prepare a foamed aluminum and alloy sandwich plate blank; (2) welding: sanding and cleaning the welding surface of the foamed aluminum and alloy sandwich plate blank, clamping and positioning the foamed aluminum and alloy sandwich plate blank, and welding to obtain the foamed aluminum and alloy sandwich plate blank satisfying the specification and dimension requirements; (3) foaming: heating the welded foamed aluminum and alloy sandwich plate blank in a heating furnace at 300-600 DEG C for 10-40 minutes; and (4) cooling: cooling the heated foamed aluminum and alloy sandwich plate in the heating furnace, thus obtaining the well-welded foamed aluminum and alloy sandwich plate satisfying the specification and dimension requirements. The preparation method has the advantages of convenient preparation process and low processing cost; and the obtained foamed aluminum and alloy sandwich plate has fine performance.

A motor may include a motor base plate, a bearing holder provided with a through hole whose both ends hold bearings and vertically disposed with respect to the motor base plate, a stator provided with a center hole and fixed to an outer peripheral face of the bearing holder, and a rotor having a shaft supported by the bearings, a rotor case fixed to the shaft, and a magnet fixed on an inner peripheral face of the rotor case. The bearing holder may be provided with a stepped part, protruded toward a radial direction. The stator may be provided with a first resin block structured so that an end face on a motor base plate side of the stator core is molded with resin to cover a coil wound around the stator core, and inner peripheral faces of the stator core and the first resin block structure the center hole, and the center hole of the stator is press-fitted and fixed to the bearing holder until an end face of the first resin block is abutted with the stepped part.

The invention discloses a special tooling for turning high-precision thin-wall cylinder liner bores, which comprises an internal taper sleeve, an elastic clamp and an axial positioning disk, the left end of the internal taper sleeve is connected with a spindle flange, the right end of the internal taper sleeve is connected with the axial positioning disk, the right side of the internal taper sleeve is provided with a taper hole, the taper hole is connected with a cylindrical hole of the left side, the sidewall of one side of the cylindrical hole is provided with a guide hole, a vent hole is formed in the left side of the guide hole, the elastic clamp comprises an internal cylindrical hole and an external conical surface, the external conical surface is connected with an external cylindrical surface, a pull rod holder is arranged on the external cylindrical surface, the pull rod holder is provided with a pull rod-fixing hole, a washer is arranged at the right side of the pull rod-fixing hole, the outer diameter of the washer is greater than the inner diameter of the pull rod-fixing hole, the excircle of the end of an oil cylinder pull rod is matched with the pull rod-fixing hole, the end of the oil cylinder pull rod is provided with a threaded hole, and the oil cylinder pull rod is connected with the washer. The structural precision of the special tooling is high, a thin-wall cylinder liner can be positioned and clamped reliably, clamping stress is uniform, the deformation of the thin-wall cylinder liner caused by clamping force is reduced, and the precision requirement of workpieces is met.

The invention discloses a titanium alloy implant composite material and preparation and an application thereof. The titanium alloy implant composite material is prepared by the following steps of: by taking a model manufactured from titanium alloy powder through 3D printing as a titanium alloy implant substrate, forming a micro-arc oxidation layer on the surface of the titanium alloy implant substrate through a micro-arc oxidation method; then forming a hydroxyapatite layer or a hydroxyfluorapatite layer on the surface of the micro-arc oxidation layer by means of an electrochemical deposition method; and finally, immersing the surface of the hydroxyapatite layer or the hydroxyfluorapatite layer to form a polylactic acid layer. According to the material provided by the invention, individual development of the titanium alloy implant material is realized from data acquisition of an original damaged bone structure to preparation of a final multi-coating composite material, so that the high quality titanium alloy implant composite material is obtained. A polarizing test shows that the anti-corrosive property of the material can be enhanced by 2-3 orders of magnitudes, and osteoblast cultivation shows that the titanium alloy composite material has a better osteocyte promoting ability.

The invention discloses an integrated electric driving power assembly. The problems of larger axial dimension and larger weight of an electric driving power assembly in the prior art are solved. The integrated electric driving power assembly comprises a motor and a gearbox; an output shaft of the motor and an input shaft of the gearbox are integrally made to form a spindle of the power assembly; aparking gear is arranged in the gearbox; and the parking gear is fixedly mounted on the spindle. According to the integrated electric driving power assembly, the axial dimension of the power assemblyis obviously reduced to be beneficial for realizing the light weight of the power assembly and the layout of the power assembly in a vehicle.

The invention discloses a device and a method for processing a roller micro groove. The device for processing the roller micro groove at least comprises: a cutter holder, wherein one side of the tool holder is at least provided with a plurality of cutter fixing openings; and a plurality of cutters which are fixedly arranged in the cutter fixing openings in a corresponding manner, wherein each cutter is provided with a knifing and a nose radius, the knifings are different from each other and the same goes for the nose radii, and these cutters can cut the surface of a roller simultaneously.

The invention discloses a full-automatic lens edge grinding machine. The full-automatic lens edge grinding machine comprises a rack, and is characterized in that an automatic material charging and discharging mechanism, a rotary worktable, a lens clamping device, a cross-shaped sliding table feeding mechanism and a grinding mechanism are arranged on the rack; a material charging station, a material discharging station and a material spreading and collection station are distributed along the periphery of the rotary worktable; besides, a mechanical arm device is arranged on the rack corresponding to the rotary worktable; the automatic material charging and discharging mechanism comprises a lens absorbing mechanism at the upper end; the lend absorbing mechanism is arranged on the rack on oneside of the material charging station correspondingly and is used for lifting a lens on the top end of the material charging station to the clamping end of the mechanical arm device; the cross-shapedsliding table feeding mechanism is located on the horizontal side of the rotary worktable; the lens clamping device is fixedly arranged on the working end of the cross-shaped sliding table feeding mechanism; and the grinding mechanism is arranged below the lens clamping device. The full-automatic lens edge grinding machine has the advantages that the automation degree is high; quality control on the lens is more stable; the production efficiency is higher; and the cost is lower.

An optical force sensing element for microsurgical instruments and methods measures force F in three orthogonal directions and includes a monolithic cylinder structure, a cylindrical surface and a top surface that absorbs and transmits the force F. Three punch-like notches, all being parallel to the y-direction, are spaced apart along the z-axis and form two blades between the first and second notch and between the second and the third notch. Three channels parallel to the z-axis extend from the bottom surface to the top surface and cross the first notch while bypassing the other two notches. Three optical fibres, each fixed in one of the three channels, all entering the structure from the bottom surface, cross the first notch and end at or near the top surface while being interrupted in the first notch and forming two surfaces of each fibre that define a Fabry-Perot interferometric cavity.

The invention provides a pre-stress fabricated high-performance circular steel tube concrete pillar-concrete beam node. The node comprises a concrete pillar, reinforced concrete beams and prestressed tendons; prestressed tendon hole passages which are mutually matched are formed in the concrete pillar and the reinforced concrete beams correspondingly; the square steel tube concrete pillar and the interiors of the reinforced concrete beams are connected through the prestressed tendons penetrating through the prestressed tendon hole passages; and the square steel tube concrete pillar and the exteriors of the reinforced concrete beams are connected through angle iron. According to the main construction steps of the pre-stress fabricated high-performance circular steel tube concrete pillar-concrete beam node, (1) the steel tube concrete pillar is manufactured; (2) the concrete beams are manufactured; and (3) on-site mounting is conducted. Compared with a common beam pillar node, the fabricated node has the advantages that ductility is good, construction is easy and convenient, components are easy to replace, and seismic performance is good.

The invention belongs to the technical field of ship manufacturing and discloses a rapid manufacturing method for a ship block. The rapid manufacturing method comprises the following steps: carrying out three-dimensional modeling on a ship block; dividing the structure in the ship block into a planar component and a curved surface component according to a three-dimensional modeling result; dividing the planar component into a plurality of planar plate frames according to the positions of the planar component and the curved surface component in a three-dimensional model, a mounting sequence and a connecting relation of the components, and dividing the curved surface components into a plurality of curved surface plate frames; processing the planar plate frames and the curved surface plate frames; and sectionally mounting the processed planar plate frames and curved surface plate frames, and combining, so as to form the ship block. The rapid manufacturing method is a sectional manufacturing method, the processing efficiency, manicuring precision and linear control reliability of a large-sized catamaran are improved.

The invention discloses a method for manufacturing a grid rudder, which relates to the field of metal processing. The method comprises the steps of (a) dividing one surface of a billet material into a plurality of stop welding flux coating areas (1) and a plurality of diffusion areas (2) which are distributed at intervals for each other, forming vent grooves, applying stop welding fluxes, then aligning with four sides of the other billet material, and sealing and welding, so as to form billet bags; (b) putting a plurality of billet bags into a mold in parallel and at intervals, respectively putting border billets on both ends of two adjacent billet bags, and making the projections of the diffusion areas (2) in billet pieces of the two adjacent billet bags keep parallel and distribute at intervals on a plane parallel to the billet bags; and (c) applying pressure to the mold, then leading air between the two adjacent billet bags, and then leading air to the vent groove (3) in the billet piece of each billet bag. The grid rudder prepared by using the method has the advantages of good integrality and high material utilization.

The invention relates to a precise transmission speed reducer. The speed reducer comprises an input gear shaft, a crankshaft is arranged on one side of the input gear shaft, the crankshaft is sequentially provided with an output disc, two cycloidal gears, a rigid disc and a planetary gear in a penetrating manner from top to bottom, two eccentric parts are arranged in the middle of the crankshaft,conical roller bearings are arranged between the output disc and the upper end of the crankshaft and between the rigid disc and the lower end of the crankshaft, the two cycloidal gears are located onthe periphery of the two eccentric parts of the crankshaft, the cycloidal gears are placed in the direction that the circumference difference is 180 degrees, roller bearings are arranged between the cycloidal gears and the crankshaft, the planetary gear is fixed to the crankshaft, the planetary gear is engaged with the gear of the input gear shaft, and the rigid disc is fixed to the output disc. Aneedle gear shell is included, the needle gear shell is engaged with the cycloidal gears through needle gear pins arranged on the inner circumference, and angular contact ball bearings are arranged between the needle gear shell and the rigid disc and between the needle gear shell and the output disc. The speed reducer is large in transmission ratio, high in bearing capacity, high in transmissionprecision, high in transmission efficiency, long in service life and small in return difference.

The invention discloses a fiber reinforce plastic (FRP) sectional material beam column joint capable of being assembled rapidly. The FRP sectional material beam column joint capable of being assembledrapidly comprises a FRP pipe concrete column with an embedded cross-shaped FRP sectional material, a box groove FRP sectional material concrete combined beam, a prefabricated joint and a matched bolt. A joint body is composed of two same parts and is assembled with the embedded cross-shaped FRP sectional material, and the beam is connected with the joint through an end part pre-embedded groove shape steel plate. The main construction method of the FRP sectional material beam column joint capable of being assembled rapidly comprises the steps that a column prefabricated FRP pipe and the cross-shaped FRP sectional material are placed in position; the joint is assembled correspondingly with the cross-shaped FRP sectional material extending from the column and the beamless connection direction bolt is tightened; the beam is hoisted in position, the beam end groove steel plate and the joint are opposite to a reserved bolt hole and the bolt is tightened; and a template is arranged in a supporting mode, and concrete in the column and the concrete at the joint are poured. The FRP sectional material beam column joint capable of being assembled rapidly is simple in construction and convenient to construct, can greatly improve the construction efficiency, and is easy to control the quality. Meanwhile, a force transferring route of the joint is distinct, the good energy consumption is achieved, and the safety of a main body structure can be well guaranteed.

The invention discloses a material surface micro-nano composite strengthening boiling structure as well as a preparation method and application of the material surface micro-nano composite strengthening boiling structure. The material surface micro-nano composite strengthening boiling structure comprises a base material and a micro-nano composite structure formed on the surface of the base material. The micro-nano composite structure comprises micro mastoids, communication-type grooves and nano-folds, wherein the micro mastoids are formed in the communication-type grooves, and the surfaces ofthe micro mastoids are provided with nano-fold shapes. The preparation method of the material surface micro-nano composite strengthening boiling structure comprises the following step of forming a micro-nano composite strengthening boiling structure on the base material through a laser integrated etching method. The material surface micro-nano composite strengthening boiling structure has multi-scale micron and nanometer characteristics in different levels.

The invention provides a bionic crossed fishbone-shaped continuum robot mechanical arm. The bionic crossed fishbone-shaped continuum robot mechanical arm comprises a box body, a flexible mechanical arm, a driving rope, a driving motor module and a control module, and the control module controls the driving rope to drive the flexible mechanical arm to act through the driving motor module; the flexible mechanical arm comprises an end cover, a plurality of fishbone-imitating basic modules and a plurality of middle connecting discs, and every two adjacent fishbone-imitating basic modules are connected in series in a crossed mode through the corresponding middle connecting disc; and the fishbone-imitating basic module comprises a rigid-flexible bionic fish skeleton and a spring steel sheet. According to the mechanical arm, bending movement in all directions can be completed, deformation of the driving rope in the movement process of the mechanical arm is closer to a circular arc through a specific rigid-flexible mixed bionic fish skeleton structure, the deformation is better matched with a theoretical model assumption condition, therefore the tail end position of the mechanical arm is more accurate, and the problem that a mechanical arm of a traditional continuum robot is large in motion error is well solved.

The invention relates to the technical field of ceramic preparation, particularly to a preparation method of gradient functional ceramic. According to the invention, slurry and the process parametersof 3D printing are optimized, and particularly, sintering additives in ceramic composite powder in the slurry and the exposure energy of 3D printing are optimized; a blank is printed by adopting exposure energy corresponding according to different slurry; the blank obtained by 3D printing is uniform and has high forming rate; and a ceramic formed by degreasing and sintering the blank under certainconditions is small in deformability, high in structural and dimensional precision, good in interlayer cohesiveness and high in density and bending strength. The gradient functional ceramic preparedthrough the method is high in forming efficiency and forming size precision; the structure of the gradient functional ceramic can be accurately regulated and controlled; functionalization is achieved;the material cost of the ceramic can be reduced; and production efficiency is improved.

The invention discloses a gradient heating nozzle device for fused deposition metal 3D printing. The gradient heating nozzle device comprises an extruding assembly, a charging barrel and a nozzle body. The extruding assembly is connected with the charging barrel through a fixing connecting part. The tail end of the charging barrel is connected with the nozzle body. The extruding assembly comprisesa worm, a worm wheel, a lead screw and a piston. The worm wheel is engaged with the worm through gear teeth. The worm wheel drives the lead screw through threads. The tail end of the lead screw is connected with the piston. The worm rotates to drive the worm wheel to rotate, the worm wheel rotates to drive the lead screw to move, and then the piston is driven to move. The charging barrel is provided with a feeding inlet and a heat insulation heating assembly. The heat insulation heating assembly comprises a heating layer and a heat insulation layer. The heating layer is tightly attached to the outer wall of the charging barrel. The heating layer and the charging barrel are wrapped with the heat insulation layer together. The nozzle body is provided with a temperature sensor and a heatingpipe. The heating temperature of the heating pipe is higher than that of the heat insulation heating assembly, and gradient heating is formed.

The invention discloses a single rod type main bearing structure applicable to a micro-nano remote sensing camera, relates to the technical field of space optical remote sensing, and solves the problems that the existing coaxial space camera main support structure is high in weight and large in shading ratio and process difficulty, an integrated formation structure is too high in production cost and long in processing period and the like. According to the single rod type main bearing structure applicable to the micro-nano remote sensing camera disclosed by the invention, a secondary mirror bracket and a support rod are in flanged connection; the support rod and a main backplate are in flanged connection; due to adoption of a split type structure, instead of an integrated structure, the processing difficulty of silicon carbide can be greatly reduced; the production period and the manufacturing cost are greatly reduced; the low-cost and short-period requirements of micro-nano load are satisfied; a countersunk bottom hole and an embedded part are pre-punched on a silicon carbide material; an epoxy resin adhering manner is adopted; and the problems that the process of directly processing a threaded hole in the silicon carbide material is high and damage is easily caused can be avoided. By means of the single rod type main bearing structure applicable to the micro-nano remote sensing camera disclosed by the invention, the structural precision and the stability are improved; the structural part number and the manufacturing process are simplified; and the processing period and theprocessing cost are shortened.