842results about How to "Improve surface accuracy" patented technology

The invention is a system for detecting and reporting the presence and/or weight of inventory items. The system includes a storage unit having a surface for storing inventory items, one or more sensors positioned on the surface, and a reporting unit for receiving and transmitting the first signal. The sensors may detect and send one or more signals to the reporting unit indicative of the presence and/or weight of inventor items on the surface. The reporting unit then transmits this signal to a controller which uses the presence and/or weight data to determine the presence of items on the surface, the weight of items on the surface and/or the pattern of items on the surface. By knowing presence, weight, and/or pattern of items, the controller is better able to determine the identity and quantity of items in the storage unit.

A process for the production of a thinned wafer, comprising bonding the circuit surface (surface A) of a semiconductor wafer (a) to a holding substrate (b) with an adhesive film (c), grinding and polishing the back surface (surface B) of the semiconductor wafer to thin the semiconductor wafer, carrying out the metallization of the back surface (surface B) and the like as required, and then separating the thinned wafer from the holding substrate (b), wherein a thermoplastic resin film is used as the adhesive film (c) and the above bonding of the circuit surface (surface A) of the semiconductor wafer (a) to the holding substrate (b) is carried out at a bonding temperature selected from the range of from +10.degree. C. to +120.degree. C. of glass transition point of the thermoplastic resin film or the range of from -40.degree. C. to +20.degree. C. of melting point of the thermoplastic resin film.

The invention provides a vertical five axle interlocked gantry digital control milling machining center, comprising a planer body, a portal frame, a rotary workbench stand, an electrical appliance control cabinet, a cutter, a main spindle box, an operation panel, a rotary workbench, X, Y and Z shaft driving screws and rotary tool changers, wherein the rotary workbench is formed by a large rotary workbench and a small rotary workbench which respectively rotate around an A shaft and a B shaft; the portal frame is arranged on the planer boxy and can move back and forth via the X shaft driving screws arranged at the two sides of the planer body, a Y-Z shaft connection block moves left and right via the Y shaft driving screw in the portal frame, and a main spindle in the main spindle box moves up and down via the Z shaft driving screw on the Y-Z connection block so as to form five axle interlocking; and the rotary tool changers arranged at the two sides of the portal frame are internally provided with 32 grinding cutters and milling cutters, and tool changing is realized by a tool changing manipulator. The invention has the positive effects of realizing multiply functions of one machine, and can process as many as five interfaces by primary clamping, thus reducing clamping times, saving labor, time and space, and having convenient equipment maintenance.

The invention provides a method of reconstructing a dentition through a dental CT (Computed Tomography) image and three-dimensional scanning data. The method includes the steps of: preprocessing the CT image, and removing soft-tissue pixels; using an image segmentation method to obtain all individual tooth contours; using a surface drawing method to obtain a dentition model of the CT image; and establishing a segmentation surface to extract all dental crown models of the CT image; obtaining a three-dimensional scanning model of a dental jaw, and obtaining independent dental crown models afterprocessing; registering the dental crown models of the CT image and the dental crown models of the scanning data; and carrying out fusion and reconstruction on dental root models of the CT image and the dental crown models of the scanning data to effectively construct a three-dimensional model of the dentition with dental crown information with high precision. The method solves the existing technical problem that voxel resolution of patient complete-dental-jaw three-dimensional-models extracted through CT images is low, and can be used for formulation assisting of invisible-orthodontics schemes of physicians, assisted design of orthoses and further biomechanical analysis.

The invention provides an aerial camera Cassegrain primary and secondary mirror supporting structure, belongs to the technical field of optical engineering, and aims at solving problems in the prior art that the supporting structure is complex, the processing and adjusting cycle is long and cost is high. A primary mirror base is fixedly connected with one end of a mirror cone. A primary mirror gasket is arranged between the primary mirror base and the mirror cone. A secondary mirror base is fixedly connected with a connecting frame. An axial gasket and an angular gasket are arranged between the secondary mirror base and the connecting frame. The connecting frame is fixedly connected with the other end of the mirror cone. A primary mirror and a secondary mirror are respectively fixed on the primary mirror base and the secondary mirror base. Flexible hinges are directly processed on the primary mirror base and flexible slots are processed on the secondary mirror base so that stress transmitted to the surface of a reflecting mirror in change of external environment temperature and the assembling process can be reduced and optical surface figure accuracy can be enhanced; and axial distance and relative angle of the primary mirror and the secondary mirror are adjustable so that the primary mirror and the secondary mirror are ensured to possess correct spatial position, and the assembling process is simple and short in the cycle.

The invention discloses a self-adaption profile modification blade abrasive belt polishing machine tool, comprising a machine tool body, an X-axis carriage, an X-axis carriage, a C-axis rotary table, a Y-axis sliding block, an abrasive belt polishing head component, an air cylinder, and the like, wherein a pressure compensation element is in series connection between the abrasive belt polishing head component and the air cylinder to cooperate with the air cylinder to form a polishing contact pressure. During machining, the polishing machine tool performs interpolation feed according to an ideal polishing track; due to the existence of a blade profile error (or waveness), the polishing contact point deviates from the ideal polishing track in a pressure shaft direction, and the acting pressure of the pressure compensation element changes along with the deviation, so as to realize the polishing contact pressure compensation; the pressure compensation element can utilize a constant-pressure type gas bearing with oppositely arranged air cushions, and realizes the polishing contact pressure compensation effect by utilizing a pressure balance function to the oppositely arranged air cushions. The self-adaption profile modification blade abrasive belt polishing machine tool has the advantages that the response speed of pressure compensation is increased, the self-adaption modification on the profile error (or waveness) during blade polishing machining is realized, and the profile precision is improved.

A titania-doped quartz glass containing 3-12 wt % of titania at a titania concentration gradient less than or equal to 0.01 wt %/μm and having an apparent transmittance to 440 nm wavelength light of at least 30% at a thickness of 6.35 mm is of such homogeneity that it provides a high surface accuracy as required for EUV lithographic members, typically EUV lithographic photomask substrates.

The invention discloses a combined plastic forming method of an automobile hub and a matching forming mold of the automobile hub. The method comprises the following steps of: 1, forming the automobile hub by using light-alloy blanks through a set of forming mold at two steps under the condition of constant temperature, wherein the forming mold is provided with a split lower mold, two upper extrusion male molds and two upper bulging male molds, and the upper extrusion male molds and the upper bulging male molds are sequentially matched with the split lower mold; 2, matching the blanks in the mold by using the upper extrusion male molds and the upper bulging male molds during forming; 3, pre-forming a spoke part of the hub and the lower part of a rim by adopting an extrusion process; 4, forming the upper part of the rim into a hollow pipe blank; and 5, matching the upper bulging male molds with the lower mold and forming a pre-formed part formed in the step 1 into the hub through the extrusion process. Equipment disclosed by the invention has a simple structure, the deformation resistance of each-step process is lower, the mold size and the equipment tonnage are effectively reduced,the production efficiency is improved, and the production cost is lowered.

The invention discloses a manufacturing method for directly molding a high-entropy alloy turbine engine hot end component through laser metal, and belongs to the technical field of manufacturing of turbine engine hot end components. The method includes the steps that any five or more kinds of high-melting metal powder is selected from eight kinds of high-melting metal powder, and the high-melting metal powder is evenly mixed to prepare high-entropy alloy powder; a three-dimensional solid model of the turbine engine hot end component is built, necessary auxiliary supporting structures are additionally arranged, and data files in the stl format are obtained and led into a rapid molding device; a blank of the turbine engine hot end component is rapidly molded through the LMDF technology, heat processing is carried out, then the auxiliary supporting structures are removed, abrasive particle stream finish machining and surface processing are carried out, and the high-entropy alloy turbine engine hot end component with the good high-temperature behavior is obtained. The turbine engine hot end component molded with the method has the high density and the excellent high-temperature behavior; meanwhile, the high molding precision and the high surface precision are achieved, and rapid and accurate manufacturing of the high-performance turbine engine hot end component can be achieved.

The invention discloses a deposition forming manufacturing method of parts and molds, and belongs to the field of non-mold growing manufacturing and remanufacturing. The method comprises the following steps that S1, the three-dimensional CAD model of a workpiece to be formed is subjected to hierarchical slicing; S2, the CNC codes of all hierarchical slices are acquired; S3, deposition forming is conducted layer by layer according to the CNC codes of all the hierarchical slices, the fine portions of the workpiece are formed by laser, and one or more technologies in electric arc welding, electron beam welding, electroslag welding and submerged-arc welding is or are adopted to form the thick wall and the non-fine portions of the workpiece; or in the S3, a heat source which is compounded by laser beams and gas protection electric arcs or a heat source which is compounded by the laser beams and vacuum protection electronic beams is adopted for forming the thin wall and the fine portions of the workpiece, and the gas protection electric arcs or the vacuum protection electron beams are shut down. According to the deposition forming manufacturing method, direct deposition forming can be achieved to obtain parts and molds which are stable in structure property and high in manufacturing precision and are provided with thin walls or fine portions.

The invention discloses a machining process of middle-long thin-wall blades, which belongs to the technical field of machining of blades. The machining process is implemented by a detailed process of integrated rough machining and integrated fine machining, wherein the integrated rough machining comprise the specific steps of rough machining of each surface of a blade tip, each surface of a blade root and a molded surface of a steam passage; and the integrated fine machining comprises the specific steps: semifinishing of each surface of the blade tip and each surface of the blade root, fine machining of each surface of the blade tip, each surface of the blade root and each residue, semifinishing of the steam passage and fine machining of the steam passage. According to the machining process of the middle-long thin-wall blades, the operation is simple and convenient, the use is convenient and fast, the cost is low, the machining efficiency is high, and the operation is easy and labor-saving; and the deformation of the middle-long thin-wall blades is controlled within 0 to 0.8mm, the normal machining of a subsequent mold correction process is facilitated, and the machining of each blade is finished once.

A light emitting device includes a light emitting element emitting light, a first substrate on which the light emitting element is mounted, a second substrate forming a sealing space for the light emitting element between the first substrate and the second substrate and a light exiting window for allowing light emitted from the light emitting element to exit, in which at least one of the first substrate and the second substrate has cleavage characteristics and a cleavage plane thereof serves as a window attaching surface to which the light exiting window is attached.

The invention discloses a laser scanning method used for fast forming a high-temperature alloy structural member. The method comprises the following steps that (a), according to the geometric feature comprising the area S, the wall thickness H and the shape P and the precision requirement of the structural member, a geometric model of each layer is divided into a plurality of areas, scanning methods for the different areas are determined, and the rectangular-ambulatory-plane shape, the stripe shape and the chess board shape are involved in the scanning methods; (b), forming scanning is carried out, the different areas in each layer are sequentially scanned, and the structural member is formed; (c), the outer surface is scanned, the outer surface of the formed structural member is scanned for the second time, and fast repair and heat treatment on the outer surface of the structural member are realized. According to the method, all the slice layers are divided into areas, the different scanning methods are selected, and therefore the problems of stress deforming and cracking caused by heat concentration are effectively avoided; the mechanical property and the surface precision of the high-temperature alloy structural part fast formed are improved.

The invention relates to a glaze material which comprises the following components in parts by weight: 30-50 parts of inorganic gel, 1-3 parts of modifier, 10-20 parts of fine aggregate, 30-50 parts of coarse aggregate, 3-5 parts of reinforced fiber, 0.2-0.4 part of water reducer, 0.01-0.06 part of retarder, 0.01-6 parts of moisture repellent, 0.1-0.5 parts of water-retaining agent, 0.5-2 parts of flexibilizer, 0.5-3 parts of densification agent and 2-6 parts of mineral pigment. The invention also provides a preparation method of a glaze material plate. Most of the components of the glaze material are common inorganic materials, thus being low in cost, having no toxicity and radiation, having no contamination, and being environment-friendly. When in preparation of the glaze material plate by using the glaze material, the step of high temperature roasting is eliminated, the molded glaze material plate can be cured at normal temperature, and carbon emission can be greatly reduced, so that the preparation method is environment-friendly and energy-saving.

The invention disclose a calcium fluoride single crystal ultra-precision machining method based on a chemico-mechanical polishing and ion beam polishing combined process. The method comprises the following steps of: polishing a calcium fluoride single crystal by adopting a chemico-mechanical polishing, removing surface damages and sub-surface damages on a calcium fluoride surface, and exposing an ideal atom layer to obtain a super-smooth crystal surface; and improving the surface figure accuracy of the super-smooth crystal surface obtained in the previous step by adopting an ion beam polishing method to realize ultra-precision machining of a calcium fluoride single crystal with nano-grade or sub-nano-grade surface figure accuracy and a super-smooth surface. Due to the adoption of the machining method disclosed by the invention, respective technological advantages of chemico-mechanical polishing and ion beam polishing can be utilized fully; and moreover, the machining efficiency and the machining accuracy are high, and the product quality is good.

The invention discloses an efficient fluid finishing method based on the structure cavitation effect. According to the efficient fluid finishing method, the Venturi tube cavitation effect is introduced to fluid finishing, strong bubble cavitation action is formed in the effective polishing area formed between a processing tool and a workpiece to be processed by arranging a Venturi tube structure on the processing tool, and the bubble cavitation action is utilized to drive a liquid-solid abrasive flow in the formed effective polishing area to move in a high-speed turbulent vortex mode to achieve processing on the surface of the workpiece to be processed through abrasive particles. According to the efficient fluid finishing method based on the structure cavitation effect, the Venturi tube structure is utilized to achieve growth and collapse of bubbles in the microspur gap between the processing tool and the workpiece to be processed so as to achieve unordered and high-speed turbulent flow of the abrasive particles; compared with processing equipment adopting ultrasonic waves, the structure is simpler and the cost is lower; and compared with normal bubble-free-collapse processing equipment, the controllability is better, and the bubble collapse driving effect is more obvious.

The invention relates to a curved surface finishing processing device which is equipment for surface processing, in particular to a processing device using flexible shafts and surface processing toolsto finish or smoothen a processed three-dimensional curved surface, belonging to the field of mechanical engineering and aiming at changing the traditional processing way finishing the surface of a plane workpiece by driving the tool by a rigid shaft and providing a solving scheme for the finishing processing of the three-dimensional surface of the workpiece. The curved surface finishing processing device comprises flexible shafts, flexible shaft support mechanisms, the surface processing tools, a support frame, a base and a work table and is characterized in that the flexible shafts (1) areone group or a plurality of groups, each group of flexible shafts (1) are provided with a plurality of the surface processing tools (3), the flexible shafts (1) are arranged on the support frame (4) through a popularity of the flexible shaft support mechanisms (2), and axes of the flexible shafts (1) are passively bent following the surfaces of workpieces (5) to be processed.

To provide a wavelength conversion member having good surface accuracy and dimensional accuracy even when processed in various shapes, and a method for manufacturing the same. A method for manufacturing a wavelength conversion member, including the steps of: subjecting a preform made of a powder mixture containing a glass powder and an inorganic phosphor powder to heat treatment, thereby obtaining a sintered powder product; and re-press molding the sintered powder product with a die.

The invention relates to a method of processing titanium alloy. The method of casting and melting the titanium alloy is: after wax pattern is made, a shell is made; and then processes of de-waxing, roasting, pouring and post-processing are practiced. Wherein, the process of roasting adopts fireproof silica solution coating to make the shell. Refractory fillers are yttrium oxide of 95 per cent and zirconia mixture powder of 5 per cent. The shell is made up of 6 layers and a half to 8 layers and a half. The process of melting begins when vacuum of the melting and the pouring reach 6.65 to 0.665 Pa. When the temperature of titanium reaches the required temperature, a centrifugal rotary table is started and rotational speed is adjusted to reach all values. The whole pouring process is completed within 3 to 5 minutes. After a casting is cooled in a furnace until the temperature of the casting is below 400 DEG C, a precise casting of titanium alloy is manufactured. The titanium alloy manufactured by the invention has a wider operation temperature range, the low temperature of which is 253 DEG C below zero and the high temperature of which is 550 DEG C. The titanium ally manufactured by the invention has low density, light weight, high strength, good resistance to decay and stable property, which can be used in different medium such as nitric acid and manganic acid.

The invention discloses a polishing composition capable of improving silicon wafer polishing accuracy and a preparation method thereof, and belongs to the technical field of chemical and mechanical polishing. The polishing composition consists of the following components in percentage by weight: 0.05-50 percent of functionalized silicon dioxide sol, 0.001-1 percent of oxidant, 0.001-5 percent of chelating agent, 0.001-10 percent of alkaline compound, 0.001-1 percent of surfactant and the balance of de-ionized water, wherein the functionalized silicon dioxide sol is aminated silicon dioxide sol. After a silicon wafer is polished by the polishing component, the surface accuracy of the wafer is higher, the surface corrosion is less, the polishing speed is high, and the flatness is high.

A thin film forming method which forms a seed film and an impurity-containing silicon film on a surface of an object to be processed in a processing container configured to be vacuum exhaustible includes: performing a first step which forms the seed film by supplying a seed film raw material gas including at least any one of an aminosilane-based gas and a higher silane into the processing container; and performing a second step which forms the impurity-containing silicon film in an amorphous state by supplying a silane-based gas and an impurity-containing gas into the processing container.

The invention relates to a device for pressing and mounting a thin-wall sleeve, which can solve the problem that the thin-wall sleeve is difficult to press and mount. The device comprises a press head, a basic shaft, a sliding sleeve, an upper floating retention sleeve, a lower floating retention sleeve, a copper sleeve and the like. The upper end face of the basic shaft is provided with a flange plate which is coaxially connected on a fixed fixture block by screws, an annular clamping groove of the fixed fixture block is clamped and hooped on a shaft journal at the upper part of the upper floating retention sleeve, the lower floating retention sleeve is coaxially positioned at the lower part of the upper floating retention sleeve, the upper floating retention sleeve and the lower floating retention sleeve are connected into a whole by the nuts of the retention sleeves, and the copper sleeve is sleeved and arranged on the lower floating retention sleeve. The sliding sleeve is arranged in the upper floating retention sleeve and the lower floating retention sleeve, and the middle part of the external diameter of the sliding sleeve is provided with a piston ring; and the lower half section of the sliding sleeve is provided with a solid shaft, and the end face of the solid shaft is provided with three centripetal tapered wedge T-shaped grooves which are uniformly distributed along a circumferential direction. The device has simple structure and convenient operation and can carry out pressing and mounting motions as long as the thin-wall sleeve is sleeved into the press head and a jack catch of a control button extends out, so that the parts of the thin-wall sleeve obtain higher pressing and mounting accuracy, and the effective guarantee is provided for enhancing the quality of a class of cylinder body.

The invention belongs to the technical field of intelligent processing and manufacturing, and particularly discloses an integrated active-passive compliant one-dimensional variable force grinding andpolishing device and a control method. The integrated active-passive compliant one-dimensional variable force grinding and polishing device comprises a linear module servo motion platform, a mountingflange, a limiting plate, a position and orientation sensor, a speed-adjustable compliant grinding and polishing mechanism and a controller, and the linear module servo motion platform is used for driving the grinding and polishing mechanism to perform linear motion; the mounting flange and the limiting plate are mounted on a base of the linear module servo motion platform, and the position and orientation sensor and the speed-adjustable compliant grinding and polishing mechanism are installed on the limiting plate; and the position and orientation sensor is used for measuring position and orientation of the one-dimensional variable force grinding and polishing device and sending the position and orientation to the controller, a force sensor is arranged between the compliant grinding and polishing mechanism and sliding blocks, the force sensor is used for collecting a contact force signal and send to the controller which can calculate speed control quantity, and the speed-adjustable compliant grinding and polishing mechanism is driven to move by rotation of a servo motor according to the speed control quantity. According to the integrated active-passive compliant one-dimensional variable force grinding and polishing device and the control method, the contact status of a abrasive belt and a workpiece can be adjusted in real time, and a stable and compliant grinding and polishingprocess is realized.

The invention discloses a brazing flux-containing aluminum alloy soldering wire and a preparation method thereof, which belong to the technical field of brazing materials. The soldering wire consists of uniformly mixed aluminum silicon brazing material powder and fluoride brazing flux powder, wherein the content of the aluminum silicon brazing material powder is 93 to 85 percent; the content of fluoride brazing flux powder is 7 to 15 percent; the aluminum accounts for 88 percent and the silicon accounts for 12 percent of the aluminum silicon brazing material powder; the fluoride brazing flux powder is potassium aluminum fluoride mixed salt consisting of KF-AlF3 series; and the molar ratio of AlF3 to KF is 44.5 to 55.5. The preparation process comprises the following steps of: preparing the aluminum silicon brazing material powder and the fluoride brazing flux powder; uniformly mixing the two kinds of powder, and performing cold isostatic pressing and vacuum sintering to prepare a blank; and extruding and drawing the blank on a thermal extruder to obtain a product. The soldering wire and the method have the advantages of shortening processing time and reducing waste treatment, along with high surface accuracy, no need of head rolling machine between passes, high material utilization ratio and high performance of soldering process.