380results about How to "Guaranteed shape accuracy" patented technology

The invention discloses an ultra-large type combined H-section steel column. The ultra-large type combined H-section steel column comprises two I-section steels and a connecting web; the two I-section steels are respectively arranged at two sides of the connecting web, and the section is of an H shape after installation; the upper end face of the connecting web and the I-section steels at two sides form a concave structure, a stiffening plate is arranged along the concave structure, and a reinforcing rod is arranged on the stiffening plate. Meanwhile, the invention further provides a manufacturing method of the steel column. According to the steel column and the manufacturing method thereof disclosed by the invention, when the bearing capacity of the post is ensured, the structure of the column is maximally simplified, raw materials are saved, the cost is saved, the manufacturing process is simple, the installation precision can be ensured, the effective usable area of a building is increased, the gravity of the structure is reduced, and the seismic response of the structure is decreased.

The invention relates to a rapid prototyping and investment casting combined dewaxing method facing a turbine blade. The method includes the steps that an internal structure of a mould core is designed according to the appearance of the turbine blade, closed small gas chambers are established in the internal structure of the mould core through the characteristic that the expansion coefficient of air is different from the expansion coefficient of a rapid prototyping material, the small gas chambers are connected with external large gas chambers through supporting rib plates, the structure design is completed, and a digital file is generated at the same time; operation is conducted on a three-dimensional model of the mould core of the turbine blade, a mould core entity of a resin material is printed through a laser rapid prototyping machine, and surface treatment is conducted at the same time for standby application; slurry dipping, sand spreading and drying hardening treatment are conducted on the mould core structure subjected to rapid prototyping, and a mould shell is obtained; and the obtained mould shell is heated, the large gas chambers communicate with the outside world at a sprue gate, and the mould shell meeting the requirement is rapidly obtained with high quality. By means of the scheme mentioned above, the problem that the ceramic mould shell expansion breakage rate in dewaxing is too high when an additive manufacturing material is used as a wax mould is effectively solved.

The invention discloses an inner-hole grinding machine with micro-ceramic bearing. A centering sleeve (3), which has an external surface with a taper and a shrinkable inner-hole diameter, is arranged in a rotary shaft(4) with an internal cone. A workpiece (2) can be mounted in the inner hole of the centering sleeve. A clamping device which clamps the centering sleeve (3) and the workpiece in the rotary shaft (4) is arranged on the two ends of the rotary shaft. An grinding steel wire rope (22) axially passes through the centering sleeve (3) and the inner hole of the workpiece (2), and the two ends of the grinding steel wire rope are fixed on a tension and clamping mechanism (29). The rotary shaft (4) is arranged on a rotary support which allows the rotary shaft to rotate around the axis line of the rotary shaft under high speed. The rotary support is arranged on a linear supporting seat which allows the rotary support to move back and forth along the axial line of the rotary shaft. The relative friction motion combined by reciprocating and rotating is produced between the wall of the inner hole of the workpiece and the convex site of the grinding steel wire rope, so the grinding of the inner hole of the ceramic bearing is achieved. Through controlling the parameters such as grinding time, tension force of grinding steel wire rope, the grinding machine can ensure that the grinding precision of the inner hole of the ceramics bearing is increased by one order of magnitude as compared with traditional grinding, and the efficiency is increased by 10 times.

The invention discloses an automatic chain transition chain plate integration punch forming technology and a chain and a chain transition chain plate manufactured by same. The automatic chain transition chain plate integration punch forming technology comprises automatically achieving positioning hole punching and trimming of a transition chain plate, trimming, primary bending, bending and finishing, pre-punching, fine punching, blanking and the like through a progressive die on a punching machine during an advancing process of a steel belt. According to the automatic chain transition chain plate integration punch forming technology, automatic machine operation replaces traditional manual operation, production efficiency of products is improved, the forming process is achieved through primary bending and bending and finishing, cracks caused at the bending positions can be reduced, and accordingly the smoothness of the transition chain plate is guaranteed; the hole size accuracy and shape accuracy and the hoe diameter euphotic belt quality are guaranteed due to the pre-punching and the fine punching; machining is performed based on the same positioning reference, the product size accuracy and the product identity are guaranteed, the product quality is improved, and the unaccepted product rate is reduced.

The invention discloses a pulse laser drilling device in the field of laser drilling devices and a drilling method thereof. The device comprises a laser generator, wherein an ultra pulse convertor, a plus lens group and a clamp are sequentially arranged on the light path of the laser generator; the signal input terminal of the laser generator is connected with the signal output terminal of a numerical control box through a laser generator control device; the signal input terminal of the ultra pulse convertor is connected with the signal output terminal of the numerical control box through an ultra pulse convertor control device; the numerical control box is connected with a computer; and the drilling method comprises the steps that a plurality of short pulse laser beams, with power density values being steadily increased, are focalized to be a laser focal point through the plus lens group, and the laser focal point irradiates the surface of a workpiece, so as to perform drilling. The pulse laser drilling device and the drilling method thereof improve the shape precision during hole machining, guarantee the machining quality of holes, and can be applied to laser drilling.

The invention discloses a metal 3D printer using atomized metal as a printing material. The metal 3D printer comprises a 3D printing unit, a metal atomization control unit, a control unit, a cooling system, a mist extractor, and a finished workpiece automatic-discharging unit. The 3D printing unit comprises a workbench, a servo motor, a rotational structure, an atomized metal spray nozzle, a liquid conveying pipe, a heater and a cooler, wherein the atomized metal spray nozzle is connected with an atomizing chamber through the liquid conveying pipe. The metal atomization control unit comprises a smelting furnace, an atomizing furnace, a thermocouple sensor, a liquid conveying tube and a melt valve, wherein the smelting furnace is connected with the atomizing chamber through the liquid conveying tube. The finished workpiece automatic-discharging unit comprises an electric automatic door and a workpiece finished product box and is used for automatically discharging finished workpieces. According to the invention, ultra-micro metal powder is not required, the kinds of selectable metal are multiple, appearance accuracy of printed metal devices is guaranteed, and the purpose that multiple metal materials which are randomly distributed are printed simultaneously can be achieved through simple improvement; in addition, due to the fact that a workpiece automatic-discharging structure is used, the function that the printer in a no-man control state can continuously print multiple models is achieved.

The invention relates to a plane prototyping photo-curing three-dimensional printing method capable of controlling workpiece strength, and belongs to the technical field of plastic processing. The method includes the following implementation steps that (1) initialization is conducted, and a digital model generation technology is used for generating a workpiece digital model; (2) the strength of the part digital model and the strength of a supporting digital model are set, and exposure time of the workpiece digital model is determined; (3) the workpiece digital model in the step (1) is subjected to slicing operation; (4) a z-layer two-dimensional slice of the workpiece digital model is judged, and the exposure time is subjected to difference control according to the z-layer two-dimensional slice; and (5) the slicing layer z value of a two-dimensional image in the step (4) is judged so as to determine whether printing needs to be completed or not. By the adoption of the method, in the plane prototyping photo-curing three-dimensional printing process, the exposure time difference can be controlled through software differences according to the curing characteristic of a photosensitive resin material, and the workpiece strength can achieve gradient distribution and serialization only through one material.

The invention discloses a laser selective laser melting rapid preheating and powder spreading device. The laser selective laser melting rapid preheating and powder spreading device comprises a closedcavity, wherein a forming cavity and a recycling cavity are arranged in the closed cavity; an automatic powder adding mechanism is arranged on the upper portion of the forming cavity; and a scraper powder spreading mechanism with an adjusting assembly is arranged on the automatic powder adding mechanism in a matched manner. A metal powder preheating unit is directly integrated in a powder storagecabin, powder which is about to participate in printing only needs to be rapidly preheated to a set temperature, residual stress generated in a forming process of the metal powder is reduced, the shape accuracy and the dimensional accuracy of a forming piece are ensured, quantitative powder feeding can be realized by a scarper portion, bidirectional powder spreading is implemented, and online leveling of a scraper can be implemented.

The invention discloses a hollow blade as well as a manufacturing method and application thereof. The hollow blade comprises a cooling structure, an inner cavity and a transition structure, wherein the transition structure is located at the junction of the cooling structure and the wall surface of the inner cavity. Compared with the prior art, the blade avoids a sharp structure of the air film cooling structure of the inner cavity, the machining method can guarantee shape precision and consistency of the blade and the air film cooling structure, and occurrence of the back damage problems is thoroughly avoided from a process route layer, so that the quality and reliability of the blade are guaranteed.

An automobile rear-view mirror three-dimension profiling edge grinding machine comprises a machine tool, a pneumatic transmission control part, a fixed-axis rotation part, a rotation part and a cooling liquid addition part. The fixed-axis rotation part comprises a motor II, a cycloid needle wheel type reducer, a profiling, a locating profiling, an upper rubber base and a lower rubber base, wherein the motor II is connected with the cycloid needle wheel type reducer, drives the profiling, the locating profiling and the lower rubber base to rotate around a fixed shaft through a gear, and drives a workpiece which is clamped between the upper rubber base and the lower rubber base to rotate around the fixed shaft. The rotation part comprises a motor I, a rocker arm, a grinding wheel, a guide wheel mechanism, a cam-type mechanism and an elastic air cylinder, wherein the cam-type mechanism is circular-arc-shaped cylinders with different heights, and the circular-arc central axis of the circular-arc-shaped cylinders and the rotation center of the rocker arm coincide when the circular-arc-shaped cylinders are installed. When the profiling rotates by a circle, the rocker arm swings one time back and forth at the left-right limit position, the included angle theta between the rocker arm and the AO direction finishes a periodic change, the rotating workpiece G is wrapped for one circle by the grinding wheel, and the three-dimension grinding machining of an automobile rear-view mirror is finished.

The invention relates to a device and a method for processing the surface of a hemispherical-surface workpiece by rotary ultrasonic magnetic grinding. The device comprises a rotary drive device, an ultrasonic magnetic grinding device and a workpiece feeding device, wherein the ultrasonic magnetic grinding device consists of an ultrasonic generator, a collector ring, a carbon brush, an amplitude-change pole, a transducer, a collet chuck and a magnetic pole head, wherein the magnetic pole head is a cylindrical magnetic pole with a hemispherical end surface; the workpiece feeding device consistsof a step motor, a feeding lead screw, a workbench, a hand-operated lead screw and a clamp; when the step motor drives the feeding lead screw to rotate, the workbench can drive a workpiece to longitudinally move back and forth along the magnetic pole head; the hand-operated lead screw drives the workpiece to transversely move back and forth; and during processing, a processing gap is formed between the processed surface of the workpiece and the magnetic pole head, and the processing gap is filled with a magnetic abrasive. Through the processing device with the reasonable design and the processscheme, reasonable process parameters are set, so that precision finishing processing of a hemispherical part is realized, and grinding and processing efficiency can be remarkably improved.

The invention discloses a multi-constraint-condition aircraft skin attitude adjustment method and system. The method comprises the steps: acquiring related position data of a skeleton and inner and outer sides of an assembled skin/a to-be-assembled skin; processing the data to obtain a feature hole position on the to-be-assembled skin, a feature hole position on the skeleton, an outer side surfacetype of the skeleton, an inner side surface type point cloud of the to-be-assembled skin and an outer side contour point set of the to-be-assembled skin; calculating a pose solution set of the to-be-assembled skin under the condition of meeting a tolerance threshold by using the point cloud; enabling the point set to be in the pose solution set, and calculating a sub-solution set, under the condition of meeting a tolerance threshold, of the to-be-assembled skin; calculating an optimal pose solution with an infinitely small assembly gap in the sub-solution set by utilizing the positions of thefeature holes, the inner side point cloud and the point sets of the outer side contour of the to-be-assembled skin; and judging whether the optimal pose solution exists or not, if so, carrying out apose adjustment process according to the solution, otherwise, expanding a tolerance threshold, and iterating the process until the solution exists. With the method, the docking task requirement can bemet on the premise of multi-tolerance constraint.

The invention relates to a new process method for manufacturing a mold capable of ensuring the size accuracy of a cast blade for a large-scale water turbine. The method is characterized by comprising the following steps of: selecting materials; designing a technical scheme for manufacturing the mold; establishing a three-dimensional model for manufacturing the mold; manufacturing a mold blank; processing the mold; and detecting the mold. The process method of the invention is unique and solves the problem that a distorted-surface blade casting mold has low manufacturing efficiency and that the kind of casting mold manufactured by the traditional manual method cannot achieve the accuracy of a design size. The method solves the deformation problem of the mold per se and ensures the size accuracy of a blade-type mold through the research and application of a new material and a new method in a mold manufacturing process.

The invention relates to a back bumper beam of a low-alloy high-intensity steel vehicle; the body of the beam is an integral component for steel plate shaping with a 'U'-shaped transverse section; the mounting hole and the reinforcing ribs of the sleeve of a tow hook are arranged on the body of the beam. The invention is characterized in that the material of the body of the beam is the low-alloy high-intensity steel, the components of which includes that the content of C is less than or equal to 0.2 percent, the content of Mn is less than or equal to 2 percent, the content of P is less than or equal to 0.03 percent, the content of S is less than or equal to 0.03 percent, the content of Alt is more than or equal to 0.02 percent and the content of Nb is less than or equal to 0.9 percent; besides, the anti-tension intensity of the steel is larger than 590 MPa. The manufacture method of the beam includes the following steps of: extending and shaping to obtain the blank of the body of the beam, the left and right ends of which are provided with the reinforcing ribs and the transverse section of which is 'U'-shaped; cutting the edge and punching: punching the mounting hole of the sleeve of the tow hook in the blank of the body of the beam and cutting off the redundant plate materials; rolling and shaping: shaping the blank of the body of the beam into the size of a finished product. The invention organically combines extending and shaping and ensures the precision after being shaped by a shaping tool; the product not only can completely meet the intensity requirement of the back bumper beam of the vehicle, but also can realize batch manufacture as well as reduce cost.

The invention relates to an electrospark wire-electrode cutting and punching combined machine tool which comprises a base, a guide frame, a vertical column, a transverse guiderail, a longitudinal guiderail, a motor cabinet, a cantilever and a workpiece clamping holder; a wire outlet nozzle, a high-pressure water nozzle, a high-pressure water pipe, a broken-wire prevention detection clamping mechanism, a compression wheel, an elastic compression wheel, a compression wheel, a tension detection sensor, a deviation correction wheel, an upper guide wheel, a lower guide wheel, a high-pressure water nozzle, a wire outlet nozzle, a single type electromagnetic clutch, a main wire storage tube and an auxiliary wire storage tube; a punching motor, a pulse electric-cutting fluid mechanism, a punching needle tightening component, a belt transmission mechanism, a double-reduction mechanism, and the like. The electrospark wire-electrode cutting and punching combined machine tool has the characteristics that an automatic wire threading function can ensure automation of a workpiece in the process from punching to wire cutting, be free from expending time for manually carrying threading wires and trying to cut, and ensure the precision of the machining position and machining shape of the workpiece, as well as automatic and precise machining. The combined machine tool has an automation function that other machine tools do not have. The efficiency and precision are improved, and the machining cost is lowered.

The invention discloses a method for preparing titanium alloy nano materials through warm extrusion of a herringbone channel mold. The method is characterized in that through the herringbone central axis, the herringbone channel mold is rotated by 120 degrees, and then subsequent-pass extrusion is carried out; repeated plastic deformation of the titanium alloy nano materials can be achieved, and finally, large deformation is accumulated; the nano titanium alloy materials are obtained; in each pass extrusion process, the rotating direction of the herringbone mold is changed, and uniform severe plastic deformation of the titanium alloy can be achieved; and the grain size is uniform, and refined nano grains are equiaxed grains with large grain boundary angles, and the mechanical property of the blocky nano titanium alloy is further improved, and on the premise that the high density is ensured, the high strength and the good toughness are high.

The invention relates to a method for manufacturing laminated rotor and stator. In the method, strip steel is used as a raw material, and is punched and riveted by adopting a punch and a punch molding and rivet mould arranged on the punch to manufacture the stator and rotor; a lower mould of the punch molding and rivet mould is provided with a rivet bin; the rivet bin is provided with a rotating device; the punch is provided with a controller and a slide real-time position state inductor; the slide real-time position state inductor and the rotating device are connected with the controller; the controller indicates the rotating device to rotate at an angle alpha before the next stator and rotor is contacted with last stator and rotor in the rivet bin, so that the rotating device can deflect between two laminated adjacent stator and rotor. By combining high-speed automatic production line implementation of motor stator and rotor punching, the product accuracy can be greatly improved, the materials can be saved, the consumption is reduced, and the social benefit is remarkable.

The invention discloses a support arm for a reflector of a paraboloid trough condenser. The support arm for the reflector of the paraboloid trough condenser comprises a top boom (1), a lower boom (2), web members (3) and connecting pieces (4). The top boom (1), the lower boom (2) and the web members (3) are metal thin-wall parts of which the cross sections are non-closed. The top boom (1) of which the surface is treated is bent into a curve shape or a broken line shape; the top boom (1) is suitable for installing at least one parabolic cylinder reflector sub-mirror (20) in shape; the web members (3) of which the surfaces are treated are located between the top boom (1) and the lower boom (2) of which the surface is treated and are connected with the top boom (1) and the lower boom (2) in the manner of riveting without rivets to form the certain-strength and certain-rigidity support arm of a plane girder structure; the connecting pieces (4) are connected with the end parts of the top boom (1) and the lower boom (2) at the first end (5) of the support arm in the manner of riveting without rivets; and the support arm is connected with a central girder (60) through the connecting pieces (4).

An automatic lathe or miller for machining the spirally curved surface is composed of mainshaft box, mainshaft, chuck, machine frame, tailstock, center on the axle of tailstock, and milling tool driving unit consisting of X,Y and Z slide benches and electric mainshaft. Its machining technology includes such steps as milling reference surface, milling for shaping, refining and tempering.

The embodiment of the invention discloses a process skin for autoclave forming of a composite product and a preparation method of the process skin. In the autoclave forming process, the process skin is put on the upper surface of the composite product, an auxiliary material is put on the upper surface of the process skin, under the pressure applied by an autoclave, a prepreg preform is overall pressed downwards, the internal quality is improved, and wrinkles, caused by the weak deformation capacity of the auxiliary material, generated on the surface of the composite product are avoided. Meanwhile, a molded surface consistent with the upper surface of the composite product is arranged on the process skin, so that the appearance precision of the composite product is well guaranteed. The process skin can be widely applied to autoclave forming of composite products with complex shapes, and the appearance precision and the internal quality of the products are greatly improved.