333results about How to "Guaranteed manufacturing accuracy" patented technology

The invention belongs to the field of machine tool design, and relates to a combined additive and subtractive manufacturing machine tool, which comprises a body, a workbench, a main shaft, a numerical control system, a subtractive machining module and an additive manufacturing module. According to the combined additive and subtractive manufacturing machine tool, the additive manufacturing module is controlled by the numerical control system to form a basic structure of a required part on the workbench, then the subtractive machining module is controlled by the numerical control system to perform subtractive machining on the basic structure obtained by additive manufacturing, a function of applying ultrasonic vibration to a cutter and a gas cooling function are realized in a subtractive machining process, and the whole combined additive / subtractive manufacturing process is finally implemented. The combined additive and subtractive manufacturing machine tool can be used for realizing the efficient and precise combined additive and subtractive manufacturing of the component, the manufacturability of a complex part is improved, the production cycle is shortened, and the manufacturing accuracy of the complex part is ensured.

The invention relates to a manufacturing method of an implant denture individualized positioning guide plate in the technical field of tooth repair technologies, which comprises the steps of: firstly, establishing a three-dimensional model of anatomical structures of teeth, jaws, maxillary antrums, mandibular nerve conduits and the like according to oral cavity CT data of patients; secondly, carrying out virtual implanting on a solid modeled implant model, matching an implanted model with a patient oral cavity structural data model established after scanning a dental model by using an opticalscanner, determining the position of a guide hole of the positioning guide plate and the shape of a contact surface of gums, inserting a guide pipe in the guide hole; and thirdly, manufacturing a solid positioning guide plate. The solid positioning guide plate can provide optimal implanting position and direction to ensure the safety of an implanting technology and the long-term stability of an implant. The positioning guide plate can maximally utilize the bone quantity of the alveolar bone when in application. The invention can improve the efficiency and the accuracy of the implanting technology, ensure that the implanted implant accords with the biomechanical principle, and guarantee the repair aesthetic effect.

The invention discloses a substrate transmission mechanism, which comprises an actuating device, a primary transmission gear, a soleplate and two secondary transmission gears, wherein each secondary transmission gear comprises a bearing box, a magnetic transmission shaft, a first helical gear, and a plurality of first permanent magnetic gears and magnetic transmission units which correspond mutually; the bearing box is connected with the soleplate, the magnetic transmission units are parallelly pivoted with the bearing box, and are provided with roller wheels; the first helical gear is fixed on the magnetic transmission shaft, the primary transmission gear is provided with a second helical gear engaged with the first helical gear, and the first helical gear and the second helical gear are axially and mutually vertical; and the first permanent magnetic gears are fixed on the magnetic transmission shaft, the magnetic transmission units are provided with second permanent magnetic gears corresponding to the first permanent magnetic gears, the first permanent magnetic gears and the second permanent magnetic gears are axially and mutually vertical, and the first permanent magnetic gears drive the second permanent magnetic gears through a magnetic field. The substrate transmission mechanism realizes low noise and high cleanness in the process of transmitting substrates, and has simple structure and low production cost.

The invention provides a method for installing an overhead steel structure high, which belongs to a method for constructing a fixed structure. The prior installation method has defects that precise positioning is hard to realize and installation precision is hard to guarantee. The method comprises the following steps of: accurately modeling and correctly lofting and cutting, correctly paying off and accurately positioning; installing embedded parts, a temporary assembly jig and an upright post according to the paying-off position; positioning and fixing a joint on the temporary assembly jig; orderly lifting a main girder, a secondary girder and a purline; and unloading and dismounting the temporary assembly jig. The method is easy to guarantee manufacture precision of each component and installation precisions of the embedded parts, the temporary assembly jig, and the joint; the on-site lofting and cutting is unnecessary to undergo, and the on-site lifting and connection (welding) of each component are convenient.

The invention discloses a micro-nano scale 3D printer and a method. The 3D printer comprises a spraying head set, a printing tool, a controller and a three-dimensional movement mechanism. The spraying head comprises a plurality of spraying heads, and each spraying head applies a high-voltage pulse power supply between a corresponding electric conductive nozzle and an electric conductive base plate. Fluids are pulled from the nozzles by utilizing strong electric field force formed between the nozzles and the base plate to form Taylor Cones and stable conic jet flows. The controller controls the three-dimensional movement mechanism to drive the spraying head set and the printing tool to move relatively and meanwhile controls the movement of all the spraying heads to conduct micro-droplet spray printing on preset positions of the base material on the printing tool, and a model material, a release material and a supporting material are printed sequentially. Based on electrofluid power spraying printing (namely electric spraying printing), the micro-nano scale 3D printer solves the difficult problems that for micro-nano 3D printing, macro / micro cross-scale manufacturing cannot be achieved, the types of printable materials are few, and support is difficult to remove, and especially overcomes the deficiencies and the limitation, in the aspects of the cost, materials, resolution ratio, macro / micro cross-scale manufacturing, support removing and the like, of the of the current micro-nano scale 3D printing technology.

The invention mainly discloses a multidirectional numerical control hydraulic press for metal plasticity forming. A vertical main working cylinder, two horizontal cylinders and a push-out cylinder are mounted on a stress frame; a punching cylinder is combined inside the vertical main working cylinder stroking downwards, the two horizontal cylinders are a left horizontal cylinder and a right horizontal cylinder both of which stroke in the opposite directions, and each horizontal cylinder is combined with a quick-speed cylinder; the push-out cylinder is positioned below the vertical main working cylinder and adopts an inverted cylinder acting structure; and all cylinder bodies are controlled by a hydraulic control system. In the invention, an oil pump is used for direct driving, numerical control closed loop servo control is achieved, and meanwhile, axial loading and transverse loading are performed at the same time, so as to form high-precision parts with branch shaped or cavity-like complex structures in different directions.

The invention discloses a manufacture method for double-curve H-shaped steel. The manufacture method comprises the following steps of: 1) reviewing the material quality of a supplied horizontal plate, flattening the horizontal plate, and pre-processing; 2) three-dimensional lofting by a computer, and spreading in a plane; 3) cutting and blanking on a numeric control cutting machine; 4) opening a groove on an H-shaped steel web, and carrying out the butt welding; 5) marking a bending line and an assembly line on the web and a flange plate; 6) manufacturing a bending jig frame according to three-dimensional coordinates; 7) bending the web and the flange plate via the method of flame rectification assisting cold bending formation; 8) manufacturing a assembly jig frame; 9) combining position welding and spot-welding on an upper flange plate and a lower flange plate respectively assembled on an assembly jig frame group; 10) welding the soldering seam between the web and the lower flange plate; 11) lifting the component from the jig frame, and turning over the component to weld the soldering seam between the web and the upper flange plate; and 12) returning the jig for a repeated inspection, and carrying out the three-dimensional coordinates detection through a total-station instrument. According to the manufacture method, used equipment is simple, and efficiencies on manufacture and production are improved.

The invention discloses an automotive wire bundle punching die, which comprises upper and lower die holders connected with a punch press, a male die fixed on the lower die holder and a female die fixed on the upper die holder, wherein the lower die holder is also provided with die feet; the upper die holder, an upper base plate, a punch fixing plate are fixedly connected in turn from top down; and a punch for raising, a punch for punching, a male die for cutting, a male die for rounding a C chamfer, a make die for forming a U-shape in a head part, a male die for bending 45 DEG C, a male die for bending 90 DEG C and a male die for cutting edges are fixed at corresponding positions on the punch fixing plate according to a process sequence. The punching die also comprises a punch insert, wherein a shaping male die is connected with a gas cushion device of a press. In the invention, the design and manufacturing cost of the die is reduced, the product manufacturing period is shortened, andthe production efficiency of the product is improved. The die can perform continuous punching, and one person can operate three dies. Thus, fewer workers are required, the working efficiency is improved and the cost is reduced greatly.

The invention discloses a bolted connection technique for a prefabricated large plate shear wall provided with a concealed bracing. The shear wall comprises an upper prefabricated concrete large plate provided with concealed bracing bars, a lower prefabricated concrete large plate provided with concealed bracing bars and cast-in-place concrete. Each prefabricated concrete large plate provided with concealed bracing bars comprises a preserved rabbet, two-corner notches, a protruding notch, a steel wire gauze sheet, distributing bars, embedded column longitudinal bars and stirrups, a square steel tube, an X-shaped steel inclined strut, an inner connecting steel plate and an outer connecting steel plate, wherein the vertical distribution bars are arranged on the two-corner notch at the lower end, the steel wire gauze sheet, the outer connecting steel plate, the inner connecting steel plate provided with tapping threaded holes, and the vertical distribution bars are arranged in the area of the protruding notch, the two-corner notches are indirectly connected in a lapping mode through the upper layer and lower layer of vertical bars, the middle protruding notch is inserted into the preserved rabbet in the top end of the lower layer of the shear wall through the upper layer of the shear wall, and then the inner connecting steel plate is connected with the outer connecting steep plate through a high-strength bolt by taking the inner connecting steel plate as a nut. Vertical connection integrity is high, construction is easier and more convenient, bearing capacity is greatly improved, and a remarkable strong node and weak component effect can be generated by the structure.

The invention involves a method based on SOI material photonic crystal splitter, including an SOI substrate material. In SOI silicon-etching produced the silicon column is the six-party or square lattice with the lattice. Silicon column height is the top of SOI silicon thickness, integrity in the lattice structure of silicon saving its column and forming splitter input waveguide, two output waveguide; input waveguide attached to the output waveguide two in the middle, with two output waveguide by a silicon-segregation. Front-end input waveguide also have at least one silicon column, the output waveguide also have at least the end of a silicon column. Connected with the outside, the SOI waveguide is placed in the input waveguide input, two output of the output waveguide. The SOI waveguide is of the same height of the silicon-contour. The splitter compact structure, its length than the conventional waveguide Y splitter narrow several times. By controlling the importation of isolation and the output waveguide, silicon waveguide column size can achieve different beam than the light output, therefore more flexibility and practicality.

The invention discloses a welding tooling device for a pillar frame of a machine cabinet and an assembly method of the device, wherein the device comprises a clamp body (1) and is characterized in that a positioning element (2) and a clamping device (3) are fixedly arranged on the clamp body, the positioning element (2) is used for horizontal position limitation of all parts of the pillar frame of the machine cabinet, and the clamping device (3) is matched with the positioning element (2) for clamping all the parts of the pillar frame of the machine cabinet in the horizontal direction. By adopting the device and the method disclosed by the invention, the physical labor of operation staff can be greatly reduced, and the assembly and welding efficiency can be improved; and the welding thermal deformation of a workpiece can be controlled or eliminated, and the instability of manual welding can be reduced.

The invention discloses a high-temperature-resistant foam A-interlayer composite antenna cover and a preparation method thereof, and relates to the technical field of resin-based composite structure forming processes. The high-temperature-resistant foam A-interlayer composite antenna cover is constituted by an outer skin, a foam core layer, an inner skin and a reinforcing layer, and the outer skin, the inner skin and the reinforcing layer are made of fiber-reinforced resin-based composites, and the foam core layer is made of high-temperature-resistant resin foam; after being prepared and formed, the outer skin and the inner skin serve as moulds, the foam core layer is overall formed, the preparation precision of the interlayer antenna cover is ensured, and the influences of gaps between the skins and the core layer on the strength and performance of the antenna cover are avoided; and for meeting the high-bearing requirement for the root of the antenna cover, a thickening layer is laidon the root, the structural strength of the root of the antenna cover is improved, and meanwhile, connecting and assembling of the antenna cover are facilitated. According to the high-temperature-resistant foam A-interlayer composite antenna cover, the high-precision preparation problem of the high-temperature-resistant foam A-interlayer composite antenna cover is solved, the working demands of the interlayer antenna cover for high-temperature resistance and high strength are met, and realizing is convenient.

The invention provides a split type water jacket with a diversion water tank and an assembly method. The split type water jacket with the diversion water tank comprises an inner arc half water jacket, an outer arc half water jacket, a sealing element, a fastening element and a positioning pin group; wherein the water jacket are two separated bodies by using the centerline of a crystallizer cylinder as a dividing line; an angular water path, a side surface water path and an arc surface water path are arranged in each separated body; an inner cavity of each water jacket is provided with ribs; a diversion water tank is formed between every two adjacent ribs; and crisscross rib plates are distributed at the outer side of the water jackets. When the water sleeves are assembled, the inner arc half water jacket, an outer arc half water jacket are combined according to design dimensions firstly and then are integrally processed; after being processed, the inner arc half water jacket, an outer arc half water jacket are assembled in a crystallizer; combining surfaces are sealed; positioning pins are arranged between the combining surfaces for positioning; and bolts are arranged between the combining surfaces for fastening. According to the split type water jacket, the controllability of cooling water joints is structurally ensured; the deviation between the center of a circle of a copper pipe circular arc and the center of a casting machine can be avoided; the heat exchange effect of the water joints is beneficial for improving; and the production and operation cost is reduced.

The invention provides a box-type column thick plate welding technology and welding deformation control method. The method is characterized by comprising the following step one of the box-type column thick plate welding technology and the step two of the box-type column thick plate welding deformation control method. The box-type column thick plate welding technology comprises the following step a of matters needing attention before welding; the step b of preheating before welding; the step c of welding parameter execution; and the step d of multi-layer and multi-pass welding. The box-type column thick plate welding deformation control method comprises the following steps that a, butt joint connectors, T-shaped connectors and cross-shaped connectors are prepared; b, subassembly welding is adopted for the large structure; c, the connectors with large contraction or angle deformation are treated; and d, a bed-jig clamp is arranged for the special-shaped thick plate structure, and then welding deformation is controlled. The box-type column thick plate welding technology and welding deformation control method has the advantages that the assembly welding technology for optimizing a box is possessed, the manufacturing precision of a huge column is ensured, the engineering quality is safe and reliable, the precision of the geometric dimension of components is ensured, the welding steps are reasonable and scientific in design, implementing performance is high, and the engineering cost is reduced.

The invention discloses a bulb end milling cutter and a milling processing four-shaft associated device thereof. An S-shape bulb edge (1) is connected with a spiral circumferential edge (5), a bulb edge front face is connected smoothly with the circumferential edge front face (6), the bulb rear face (3) is connected with the circumferential edge rear face (7), and the bulb edge spiral groove (4) is connected with the circumferential edge spiral groove (8); the front angle of the bulb edge front face (2) is a rather big positive front angle, and is distributed with a small-big-small mode from inside to outside; the milling processing four-shaft associated device of the bulb end milling cutter comprises a latch bed (10), a horizontal longitudinal X axis straight-line motion flat stage (11), a horizontal transversal Y-axis straight-line motion flat stage (12), a vertical Z axis straight-line motion flat stage (13), a workpiece rotating shaft (14), and a front tool face milling head (15), and a rear tool face milling head (16). The invented devices are provided with characteristics of stable milling, smooth chip removal, simple structure, low cost, moderate price, and economic.

The invention discloses a manufacturing method of a UOE straight seam steel pipe expanded taper. The method comprises taking hot processed die steel forging as the body materials of the expanded taper, forging the body materials to obtain the body of the expanded taper, machining an central inner hole and outer surface conical rounds of the body and integrating a core spindle, an expanding sleeve and the body into a whole; machining a large end surface and twelve inclined surface of the surface of the body in a machining center, rough-milling a long groove in the middle of every inclined surface, and machining the deep holes of the large end surface and the oil hole of every inclined surface; decomposing the expanding sleeve and the core spindle, and performing quenching thermal treatment on the surface of the body; reassembling an expanding sleeve and a core spindle, then finish-milling a T-type groove in the long groove of each inclined surface of the body through a T-type groove cutter and then decomposing the expanding sleeve and the core spindle; machining every grade of inner hole of the body to a finish size through a planer type milling machine, grinding every inclined surface through a guideway grinder, performing flaw detection on the finished expanded taper, reexamining the size and completing the manufacturing process. The manufacturing method of the UOE straight seam steel pipe expanded taper simplifies the machining process, improves the machining efficiency, reduces the production cost and guarantees the manufacturing precision of the expanded taper.

The invention discloses a method for assembling a pedestal body of an overhead cell support of a hybrid vehicle and a used welding frock clamp thereof. The welding tool clamp comprises a clamp body (1), and the pedestal body of the overhead cell support of the hybrid vehicle comprises two pedestal crossbeams (11) and a plurality of middle supporting plates (12); the clamp is characterized in that a positioning element (2) is fixedly arranged at the upper end of the clamp body and horizontally limits the positions of the pedestal crossbeams (11), and a clamping device (3) is arranged at the outer sides of the pedestal crossbeams (11) and clamps the two pedestal crossbeams (11) and the middle supporting plates (12) arranged between the two pedestal crossbeams. The clamp greatly lightens the physical work of the operating staff, improves the assembling and welding efficiency, controls or eliminates the thermal deformation of workpieces caused by welding, and reduces the instability of manual welding.

The invention relates to a centrifugal cast-aluminum die of an electrical machine rotor, which is characterized by comprising an upper die part, a lower die part and a rotor core pressing part. The upper die core of the upper die part is connected on an upper die base through a socket head cap screw. The lower die core of the lower die part is connected on a lower die plate through a socket head cap screw. The top cap of the rotor core pressing part is fixed on a false shaft through an outer hexagonal bolt, a straight key is arranged in a false shaft groove, the lamination sheet of the rotor core is sheathed into the false shaft through the locating of the straight key, the top cap is fixed by an outer hexagonal bolt and compresses the lamination sheet of the rotor core, the rotor core is arranged in the locating holes of the upper die core and the lower die core. The die of the invention has simple, compact and rational structure. The upper die core and the lower die core of the die adopt the integrated structure, thereby reducing the working load of metalworking process, the assembling and inserting, greatly reducing the manufacturing cost of the die, shortening the manufacturing time of the die and ensuring the manufacturing accuracy of the die.

A manufacturing method of a nitrogen-controlled austenitic stainless steel large forging piece comprises the following steps of electric furnace primary melting, AOD refining, LF refining, die casting pouring, electroslag remelting and forging. In LF refining, double deoxidizer with the mass ratio of Al to Si being 7:3 is adopted. In electroslag remelting, a quaternary slag system with the ratio of CaF2:Al2O3:CaO:MgO equal to 72:18:5:5 is selected as electroslag protection slag. In forging, a multi-time heading pulling manner is adopted, the first fire temperature, the second fire temperature, the third fire temperature and the deformation are all controlled to be larger than 30%, it is ensured that a large amount of recrystallization is generated in the post-forging cooling process, the grain sizes are all not thicker by 4 levels after products are in solid solution, and the problem of mixed crystals of the large forging piece is effectively solved; and the nitrogen-controlled austenitic stainless steel large forging piece has good comprehensive performance and can be kept with good performance under the condition of the temperature of 350 DEG C, and the using requirement of engineering structural pieces is met.

The invention relates to a method for manufacturing a heavy mineral sprocket that is suitable for a scraper conveyor and a transfer machine, which is characterized in that: the method comprises the following steps that: a rough machining is applied to a forging blank, the forging blank is heated to the temperature ranging from 300 DEG C to 450 DEG C and then a material blank is lifted into a profiling cutting bracket; a core shaft is positioned and aligned, and a pressure plate is compressed tightly and subject to the profiling air cutting formation. The invention has the following technical advantages that: 1. by adopting the profiling allowance-free cutting tooth-shaped process, the manufacturing precision of the sprocket is ensured, so as to be beneficial to prolonging the service life of the sprocket and the achieving the internationally advanced level; 2. the effect of energy saving is distinctive, and the energy consumption of the profiling cutting sprocket only accounts for 1 / 3 of that of the electrolytic sprocket; 3. the working hours of the electrolytic sprocket account for 3 times of the that of the profiling cutting sprocket and the working hours of the profiling milling processing sprocket only account for 3.5 times of that of the profiling cutting sprocket. Obviously, the profiling cutting sprocket not only reduces the manufacturing cost, but also greatly enhances the production efficiency.

The invention relates to a manufacturing method of a compressor volute casing. The method comprises the following steps: establishing a three-dimensional model of the compressor volute casing, introducing the three-dimensional model into rapid molding equipment, directly sintering out a shape of the compressor volute casing of a plastic material instead of a sand core by using a powder sintering technology and a laser numerical control technology, and finishing casting and molding of the compressor volute casing through a traditional investment casting method. As the mold manufacturing and sand core making process is eliminated in the method, the trial period in the production is reduced, the efficiency is increased and the production cost is reduced; and the manufacturing method provided by the invention is especially suitable for trail production in a development phase and medium and small-scale production. Through the adoption of the manufacturing method provided by the invention, the manufacturing period is reduced, and the manufacturing precision of the product can be also guaranteed. Compared with similar domestic methods, the manufacturing method provided by the invention has the advantages as follows: as technological design and manufacture of a wooden mold and the making process of the sand core are eliminated, an energy-saving and environment-friendly effect is taken.

The invention belongs to the technical field of construction of steel structures, and particularly relates to a manufacturing, installation and pre-deformation method for a large-span spatial special-shaped steel structure. The manufacturing, installation and pre-deformation method particularly comprises the following steps that a calculation model is built; pre-deformation load conditions are determined; three-dimensional deformation values of all nodes are obtained; a three-dimensional model after first-time pre-deformation is built; deformation difference values of the nodes are extracted, and comparison and analysis are conducted; according to the range of the difference values, a pre-deformation adjustment value is further determined; finally, the structure is installed. The manufacturing, installation and pre-deformation method is simple, convenient to implement and effective for manufacturing and installation of the spatial special-shaped steel structure, so that the appearance of the spatial special-shaped steel structure is the same as an initial target appearance set by the design is guaranteed.

The invention discloses a method for taking and manufacturing guide tube real samples. The method particularly includes 1), selecting a sample tube bending mold with a proper side according to the size of assembly space, the size of a guide tube real sample and numerical-control bending conditions; 2), forming a sample tube on the sample tube bending mold and enabling the geometric appearance of the sample tube to meet assembly requirements; 3), measuring the sample tube by a numerical-control measuring machine to acquire bent data of a center line of the sample tube; 4), inputting the bent data of the center line of the sample tube into a tube bending machine to carry out numerical-control production of the guide tube real sample. The method has the advantages that the production of the guide tube real sample enters the digital era by the aid of the method, the guide tube real sample taking and manufacturing speed is obviously increased, the guide tube real sample taking and manufacturing accuracy is obviously improved, and the follow-up guide tube production efficiency and the follow-up guide tube manufacturing precision are further guaranteed.

The invention discloses a total station networking measurement method of a large-scale structural component, and belongs to the technical field of industrial measurement. The measurement accuracy in the prior art is low. The total station networking measurement method comprises the steps of before measurement is carried out, enabling a main station total station and an auxiliary station total station to be arranged on the two sides of the to-be-measured large-scale structural component, determining a main station user coordinate system, determining a plurality of reference points at the positions, located between the main station total station and the auxiliary station total station, of the periphery of the large-scale structural component, enabling the reference points to be brought into the main station user coordinate system, enabling six or more of the reference points to serve as station setting reference points, measuring the coordinate values of the station setting reference points, enabling the station setting reference points to be capable of being simultaneously measured by the auxiliary station total station, establishing an auxiliary station user coordinate system according to the station setting reference points, enabling the main station total station and the auxiliary station total station to respectively measure and record the coordinate values of the other reference points, and obtaining conversion parameters according to a parameter coordinate conversion equation. When measurement is carried out, data measured by the main station total station direct serve as measurement results, data measured by the auxiliary station total station serve as measurement results after coordinate conversion is carried out, and measurement on the whole large-scale structural component is completed.

The invention discloses a female die for stamping of automobile parts. The female die comprises a female die body. The female die body comprises a female die first part, a female die second part and a female die third part, wherein the female die first part, the female die second part and the female die third part are coaxially arranged in sequence from left to right. The outer diameter of the female die first part is larger than that of the female die second part, and the outer diameter of the female die second part is larger than that of the female die third part. A first middle hole is formed in the center of the female die first part, and the depth of the first middle hole is larger than the axial thickness of the female die first part. A second middle hole which is coaxial with the first middle hole and communicated with the first middle hole is formed in the center of the female die third part, and the diameter of the first middle hole is larger that that of the second middle hole. The female die has high dimensional precision, and can be used repeatedly and guarantee manufacturing precision and assembly precision of the automobile parts which are manufactured through the female die. The invention further discloses a machining method of the female die. By means of the machining method, the dimensional precision of the female die in a stamping die is high, the female die can be qualified at a time through the production process, and the product rejection rate is low.

The present invention relates to one kind of radial cascade air compressor, which includes air inlet in the axis, shell, movable vane disc and static vane disc. The movable vane disc and the static vane disc have concentrically arranged movable vanes and static vanes separately to form movable cascade and static cascade. The movable vane disc and the static vane disc are installed oppositely, and movable cascade and the static cascade are separated mutually. While the movable vane disc rotates, air sucked through the air inlet is compressed radially outwards before being exhausted via the passage. The present invention is superior to axial cascade air compressor, and has relatively high compression rate, wide design variance range and other advantages, and possesses absolute advantage in flat aeroengine and small airplane vortex jet engine.

The invention discloses an integrated machining method of a planet carrier of a robot RV reducer, and belongs to the technical field of robot RV reducer machining. The method comprises the steps as follows: forging a first casing and a second casing, and performing hot extrusion on the first casing and the second casing respectively; performing thermal refining; performing tempering; performing finish machining on end surfaces respectively; connecting the first casing with the second casing to be clamped to a clamp, and performing finish machining on inner holes formed in the first casing and the second casing with a center of gyration serving as a locating basis; performing finish machining on outer surface with the locating basis; directly machining inner rings of rolling bearings on the first casing and the second casing; accurately grinding an outer track on each inner ring simultaneously; and performing finish machining bearing positions of three tapered roller bearings on the first casing and the second casing with the location reference, and directly machining outer rings of the tapered roller bearings. With the adoption of the method, the mounting accuracy, the manufacturing accuracy and the transmission accuracy are ensured, the requirement for high accuracy is met, the service life is prolonged, machining and assembling errors and accumulative errors are reduced, the output torque is increased, and the machining cost is effectively reduced.

The invention provides a novel ratchet compensating device. The novel ratchet compensating device comprises a ratchet body (1), a ratchet brake bracket (2), a long bolt pin (3), a ratchet frame connecting plate (4), a brake pallet (5), a balancing wheel (6), a wire cable I (7), a wire cable II (7') and a wire clamp (8), wherein the ratchet body (1) is arranged on a ratchet shaft (11) through a pair of self-lubricating sliding bearings (10); the two ends of the ratchet shaft (11) are fixed to the front end of the ratchet frame connecting plate (4), and are provided with end face self-lubricating bearings (14); and the end face self-lubricating bearings (14) are arranged between the ratchet frame connecting plate (4) and the self-lubricating sliding bearings (10). By optimizing the structural design, the manufacturing technique is simplified, the safe use performance is improved, the use working tension reaches 32kN, and a compensation distance reaches 950m. The novel ratchet compensating device not only can meet the requirements of high tension and compensation distance in a contact net of a high-speed electric railway, but also brings convenience to installation and maintenance.

The invention belongs to an orofacial cleft external nose non-traumatic orthopedic treatment method in the medical field, and particularly relates to a digital preparation method for an orofacial cleft external nose deformity orthopedic appliance. The method is characterized by at least comprising the following steps: 1), acquiring three-dimensional data of the face of an orofacial cleft patient; 2) reconstructing a digital model for the face of the orofacial cleft patient in a three-dimensional manner; 3), constructing a digital model for the external nose orthopedic appliance according to a three-dimensional face model, wherein the digital model comprises a nose support C, a bridge body B and a base support A; 4), constructing solid models for the nose support C, the bridge B and the base support A through a rapid proto-typing technology according to the nose support, the bridge body and the base support made through the digital module; and 5) clinically applying the solid model of the external nose orthopedic appliance. According to the method, an existing pure manual operation is changed into computer controlled automatic processing, so that the manufacture precision of the appliance is guaranteed. Therefore, the standard and rapid individualized treatment method is provided for the orofacial cleft patient, and the clinical popularization and application of the technology can be promoted.

The invention discloses a large thin plate laser cutting clamp and a machining method thereof. The clamp is simple in structure and provided with a base plate; a support frame is arranged on and perpendicular to the base plate; the length of the support frame is matched with the length of a skin part; the top face of the support frame is a curved face I, and the curved face I is matched with the skin part in curvature; a plurality of brackets I of variable heights are arranged on one side of the support frame and on the base plate and are used for supporting the surface of the skin part; the brackets I are installed perpendicular to the base plate and the support frame; the height of each bracket I is matched with the height of the portion, corresponding to the bracket I in installation location, of the support frame; a plurality of brackets II are arranged on the other side of the support frame and on the base plate; and the brackets II are perpendicular to the base plate and the support frame correspondingly and used for supporting and fixing lugs on the skin part. According to the machining method, the problems that thin plate type laser cutting clamps are prone to deformation, high in machining difficulty and the like can be effectively solved.