345 results about "Position tolerance" patented technology

The mask electroforming method for OLED comprises: preparing module core, pre-treating the core; sticking mask; exposing; developing; deoiling; cleaning in water; activating / passivating; cleaning; electroforming mask; cleaning; removing mask; peeling mask; bonding with silk screen; detecting the product; packing. This invention can prepare the high-precise mask for OLED with thickness less than 0.5mm, and has opening tolerance up to í‚0.005mm; for example, for a 370mmí‡470mm mask plate, the crosshole position tolerance just is í‚0.008mm.

Apparatus for inspection includes an imaging assembly, including a plurality of cameras, which are mounted in different, respective locations in the imaging assembly and are configured to capture respective images of a sample. A motion assembly is configured to move at least one of the imaging assembly and the sample so as to cause the imaging assembly to scan the sample with a scan accuracy that is limited by a predetermined position tolerance. An image processor is coupled to receive and process the images captured by the cameras so as to locate a defect in the sample with a position accuracy that is finer than the position tolerance.

An improved modular heat exchanger suitable for automotive applications, and particularly radiators for heavy duty equipment, and methods for forming the modular heat exchanger. The modular heat exchanger construction incorporates a brazed core assembly composed of flat-type cooling tubes and sinusoidal centers. The ability to use a brazed core assembly within a modular heat exchanger construction promotes enhanced heat transfer efficiencies associated with the use of flat tubes and sinusoidal centers, as compared to mechanically-joined round tubes and fins. The required positional tolerances of the tubes for mating with the remainder of the heat exchanger are maintained within the brazed core assembly by eliminating core shrinkage attributable to the use of clad aluminum alloy components to construct the core assembly. In two embodiments, core shrinkage is physical suppressed through the use of an expandable brazing fixture or the inclusion of sub-headers in the brazed core assembly. In a third embodiment, a clad slurry containing a braze alloy is deposited prior to brazing on a core assembly composed of unclad tubes and centers.

The invention provides a light source packaging structure, and a positioning and coupling method thereof. The light source packaging structure comprises a sealing box cover (101), a C lens (102), a silicon based heat sink (103), a laser chip (104), an isolator assembly (106), and a silicon light chip (107). The laser chip (104), a collimating lens (105), and the isolator assembly (106) are sequentially disposed on the silicon based heat sink (103). The C lens (102) is aligned with the grating coupler (110) of the silicon light chip (107) in a fixed and coupled manner. The sealed box cover (101) is provided with an inclined inner wall used to reflect light emitted by the laser chip (104) to the C lens, and the lower surface of the C lens (102) is provided with a polishing surface matched with the incident angle of the reflected light. The side of the C lens (102) inclined toward the direction away from the silicon based heat sink (103), and the optical axis of the C lens (102) is consistent with the transmission direction of the light, and the main light is superposed with the optical axis. A coupling structure is compact, and position tolerance is large.

A modular heat exchanger suitable for automotive applications, and methods for forming the modular heat exchanger. The modular heat exchanger construction incorporates a monolithic brazed core assembly composed of flat-type cooling tubes and sinusoidal centers. The required positional tolerances of the tubes for mating with the remainder of the heat exchanger are maintained within the brazed core assembly by minimizing core shrinkage resulting from the brazing operation during which the tubes are brazed to the centers.

To provide a thermal insulation piping with no radially projecting part from a periphery thereof, so as to facilitate insertion of the thermal insulation piping into a pipeline or equivalent. In a thermal insulation tube 10 having a vacuum layer between an inner tube 11 and an outer tube 12, an evacuation port 30 for vacuum evacuation is oriented parallel with a longitudinal direction of the thermal insulation piping at an end of the thermal insulation tube 10. This construction can produce the thermal insulation tube 10 with no radially projecting part from a periphery thereof, thus providing improved workability when the thermal insulation piping is contained in the pipeline or equivalent. Further, a flexible pipe(s) 40 is / are preferably connected to the evacuation port(s) 30. This can allow increased positional tolerances in the connection of the evacuation port(s) to a vacuum evacuation device.

A conformal vacuum cup provides a machine tool attachment fitting usable in a flexible-track drill system. Using multiple, independently articulated stiffeners, the conformal vacuum cup conforms to the contour of complex aerostructure surface shapes. The individual stiffeners are decoupled from each other to some extent by grooves and slots molded into resilient overmolding material to support long-axis curving. Spacing pins employ a domed shape consonant with the elastic deformation of the workpiece surface under load. The pins employ a hard material to prevent particle embedment in use and to control position tolerance for drill heads and other tools traveling on the flexible track. Partial holes in each vacuum cup are blocked by diaphragms. Interconnection from a vacuum system manifold to the vacuum cups can be realized by penetrating the diaphragms and inserting barbed fittings connected by vacuum tubing.

The invention discloses a processing method of a flexible nozzle thin-wall dual-spherical reinforcing part and a device thereof. The processing method comprises the following steps of: 1, preparing a forging blank; 2, carrying out rough turning; 3, carrying out quenching and tempering; 4, carrying out half finish turning on an inner spherical surface; 5, carrying out destressing and tempering; 6, carrying out turning reference; 7, carrying out finish turning on the inner spherical surface; and 8, carrying out finish turning on an outer spherical surface. The device for implementing the processing method comprises a special inner spherical surface fixture and a special outer spherical fixture. According to the invention, the thin-wall dual-spherical reinforcing part is processed by adopting a special tool and a special clamping and aligning method; the processing accuracy is high; the form and position tolerance totally meets the requirement of a product on the design accuracy. The product prepared by the method provided by the invention achieve complete success by repeated ground test examination. The processing method provided by the invention not only can be used for processing the thin-wall dual-spherical reinforcing part, but also can be used for carrying out processing and controlling on other like thin-wall spherical products.

The invention discloses a method for processing key grooves of a shaft, which comprises the following steps that: two V-shaped iron blocks are fixed on a worktable of the common milling machine; a workpiece shaft to be processed is put into V-shaped grooves of the two V-shaped iron blocks; a connecting disc is arranged on one end face of the workpiece shaft to be processed, and an alignment block is fixed with the connecting disc, so that two alignment surfaces of the alignment block are vertical or parallel to the radius direction of the key grooves to be processed; the workpiece shaft and the alignment block are aligned, and the workpiece shaft and the two V-shaped iron blocks are pressed on the worktable by pressing plate bolts and pressing plates; and the key grooves on the same bus are processed by an end milling cutter in rough and fine modes, a workpiece is rotated 90 or 180 degrees, and the processes are repeated so as to process the key grooves on a plurality of buses of the workpiece shaft. By the method, the form and position tolerance of a product is ensured, a few parts are used, the structure is simple, and the workpiece is conveniently, quickly, safely and reliably clamped.

A method for producing a bent pipe from thermoplastic material with end cross-sections, central points of which have in relation to one another a positional tolerance on the basis of LN xy / JAR xy / FAR xy in relation to one another. A straight pipe element is introduced into a tool and a portion of the straight pipe element is heated that is located in the bending region to a temperature which lies above a glass transition temperature of the thermoplastic material by a first temperature value. The straight pipe element is bent about the heated bending region of the tool by a freely selectable bending angle, which has a spatial alignment in an XYZ system of coordinates that is fixed with respect to the pipe. The pipe is then cooled below the glass transition temperature by a second temperature value.

An improved induction heating apparatus is provided for attaching membrane roofs. A top membrane layer is attached to attachment disks that hold sheets of thermal insulation to the top of roof substrates. The heating apparatus emits a magnetic field that raises the temperature of the disks and a heat-activated adhesive on top of the disks which, after cooling, becomes adhered to the bottom surface of the top membrane layer. The disks in turn are attached via fasteners to the substrate portion of the roof structure. The apparatus includes a set of bottom guides that allow a user to find the attachment disks mechanically, without actually seeing those disks beneath the top membrane layer. A triple-racetrack coil provides improved positioning tolerance in all directions, for coil placement during a heating event. An optional temperature sensor can “test” the heating effect on the top membrane layer, during / after a heating event.

The present disclosure relates to a two-dimensional fiber array structure including a base which includes a baseboard, a cover board and a spacer layer, and an optical fiber cable is positioned between the baseboard and the cover board, positioning fibers are positioned at two external sides of the optical fiber cable, the spacer layer is abutted with two adjacent fiber layers of the optical fiber cable to reduce the position tolerance along X axis for further improving accuracy, whereby ensuring quality and stability of transmitting optical signal.

The invention provides a machine tool for grinding a composite workpiece under the tensioning state. The machine tool comprises a machine tool, a grinding device and a tailstock tensioning device, wherein the grinding device is arranged at one end of a carriage opposite to a knife rest in the machine tool and is connected with a feeding mechanism on the carriage; and the tailstock tensioning device is arranged on the rear of a machine tool body. The machine tool can finish turning and grinding axial workpieces, and can effectively reduce radial runout, circular degree and other form and position tolerances of the workpiece and improve the machining accuracy by adopting a clamping mode under the tensioning state.

The invention discloses a method for precisely measuring the inner diameter of a multi-direction shaft hole based on a laser triangulation method. A measuring rod extends to the shaft hole to measure the inner diameter of the shaft hole, at least one measuring section is distributed on the measuring rod, at least two measuring heads are distributed on each measuring section, and each measuring head is a measuring member based on the measuring principle of the laser triangulation method. By applying the measuring principle of the laser triangulation method, the invention solves the problem of small measuring gap of the traditional measuring method and accomplishes the precise measurement under the condition of a large gap. A light source for measuring in the invention adopts the light transmission mode of an optical fiber so that the method greatly reduces the radial size of the measuring rod, lowers heat productivity and has obvious superiority in the size measurement of small hole diameters. The invention can accomplish the measurement of the multi-radial direction diameter size and the form and position tolerance of the shaft hole, has the advantages of high measuring efficiency and high speed and precision and can realize high-automation on-line measurement of products.

A manifold for a fuel cell includes at least one floating manifold port disposable in an oversized opening defined in a manifold frame, the manifold port being shiftable in at least one plane relative to the oversized opening for reducing the positional tolerance requirement of the manifold port, thereby effecting enhanced mating of adjacent fuel cell components. A method of forming a manifold for a fuel cell is further included.

The invention relates to a tolerance unified modeling method for a mechanical product, which adopts technologies of graph theory, vectors and characteristics, etc., and implements part tolerance element modeling, part tolerance modeling, assembly fit tolerance modeling and assembly body tolerance modeling layer by layer from bottom to top according to an assembly decomposition structure of the product, thereby realizing the unified modeling of product tolerances. The tolerance unified modeling method of the invention is characterized in that: the part tolerance element model is firstly established; each part tolerance element modeling built by extended directed graphs is adopted, and all the part tolerance element modeling are adopted to establish the part tolerance element models by a summation operation of the extended directed graphs; and each assembly fit tolerance modeling built by the extended directed graphs is adopted to establish a produc tolerance unified modeling. The tolerance unified modeling method for the mechanical product has the advantages of realizing the unified modeling of a dimension tolerance, a shape tolerance, a position tolerance and an assembly matching tolerance of the mechanical product. First, the diversity and the ambiguity of the tolerance models are eliminated; second, an assembly dimension chain and error accumulation analysis can be established conveniently.

A method for detecting form and position tolerance of components comprises the following steps: (a) acquiring a chart file of a component to be detected and characteristic elements to be detected which are selected from the chart file of the component to be detected by a user; (b) performing triangular gridding on the chart file of the component to be detected, and acquiring point cloud data of the chart file of the component to be detected; (c) acquiring standard characteristic elements; (d) extracting the point clod which is fitted into characteristic elements from the point cloud data of the chart file of the components to be detected; (f) calculating the form and position tolerance between the characteristic elements and the standard characteristic elements; and (g) outputting a form and position tolerance analysis table. By adopting the invention, the form and position tolerance of components can be automatically detected.

The invention provides a method for detecting size of a part. The method comprises the following steps: placing the part on a detecting platform to ensure the part to be parallel to the X axis in the length direction, parallel to the Y axis in the width direction and parallel to the Z axis in the height direction and clamping the part with a clamp if the form and position tolerance is detected; and moving upper and lower detecting heads arranged along the Z axis synchronously, determining the initial and final positions of the length of the part through variation of light reflection detected by the detecting heads in the process that the detecting heads move along the X axis, determining the initial and final positions of the width of the part through variation of light reflection detected by the detecting heads in the process that the detecting heads move along the Y axis and computing the height of the part through the distances, which are measured by the two detecting heads respectively, between the two detecting heads and the corresponding points on the part in the Z axis direction. By adopting the method and the device, the system errors which are easy to occur in the process of detecting the size of the part can be effectively reduced.

The invention relates to an airbag overall dimension detection method based on binocular vision. The airbag overall dimension detection method comprises the steps of: (1) calibrating a binocular vision system by using a calibration board; (2) simultaneously shooting a to-be-detected airbag by using a binocular camera, preprocessing two images, then extracting edges, thinning into single pixel, and filling breakpoints; (3) segmenting and matching a contour curve of the to-be-detected airbag; (4) reconstructing a three-dimensional curve segment, and optimizing the curve segment; (5) performing coordinate transformation on the three-dimensional curve segment of the to-be-detected airbag, and matching the three-dimensional curve segment of the to-be-detected airbag with a three-dimensional digital-analog curve segment of the edge contour of a standard airbag; (6) calculating position tolerances Vx,Vy and Vz of detection points and a form tolerance K of the contour curve segment in which the points are positioned, so as to respectively determine whether the detection points are in the ranges of the position tolerances and the form tolerance. Traditional airbag overall dimension detection methods including a three-coordinate detection method and a test tool detection method can be simultaneously replaced by the airbag overall dimension detection method, the cost can be reduced, the efficiency can be improved, and the airbag overall dimension detection method has the advantages of automation, non contact, high precision, high adaptability and the like and can be used for effectively detecting the overall dimensions of various airbags.

The invention relates to the technical field of mechanical detection and particularly relates to a method for achieving multi-station measurement element calculation through a coordinate measuring machine. According to the method, the principles of multi-direction detection, unchangeable spherical center relative position and 6-point location are used, and a public coordinate system establishing method is used, accordingly, the problem of calculation of size and shape position tolerance among elements measured by coordinate parts in different stations is solved, the problem that parts exceeding measuring machine stroke cannot be detected on the coordinate and need to select larger-stroke coordinate is solved.

An X-ray reading device, for reading out X-ray information stored in a phosphor plate, includes an insertion device into which a cassette in which the phosphor plate is located, can be inserted, and an oblong insertion opening through which the phosphor plate located within the inserted cassette can be conveyed into an inside cavity of the X-ray reading device. In order to guarantee a reliable light seal with a simple closure mechanism which can accommodate different position tolerances and cassette formats, at least one closure mechanism is provided which can be moved in a longitudinal direction of the insertion opening to close at least one second section of the insertion opening.

The invention discloses a precise compound plastic forming method of a special shaped curved surface stator of a steering pump. The method is carried out with the following steps: blanking, heating the stock to a full-recrystallization temperature plus or minus 10 DEG C and holding; pre-heating a thermoplastic inverted extrusion mould to a temperature of 200 DEG C-400 DEG C, brushing a lubricant on the mould, placing the stock in the thermoplastic inverted extrusion mould to extrude and obtaining the rough with a single-side working allowance of the inner-type cavity curve of less than or equal to 0.4mm; then heat treating, eliminating the residual stress, processing the upper and the lower end surface of the rough until the depth of parallelism thereof is less than or equal to 0.02mm, placing the rough in a cold-trimming mould for trimming at cold state until the single-side working allowance is 0.15mm-0.25mm; processing positioning holes with a position tolerance of less than or equal to Phi 0.02m, hear treating again until the rigidities of surface and core meet the requirement, grinding and obtaining the special shaped curved surface stator of the steering pump. The inventive method is characterized by small forming force, good forming quality, high production efficiency and low cost, and the formed parts have high abrasion resistance and fatigue resistance.

The invention provides a machining method for a precision inner cavity thin-wall integral centrifugal impeller of an aerospace engine. The machine method comprises the steps of material preparation, blank rough outline turning, semi-fine profile turning, blade type rough milling, natural failure, profile 1 fine milling, drilling, blade type fine milling, blade profile 2 fine milling, clamp repair,dynamic balance, fluorescence inspection and final inspection. According to the machining method for the precision inner cavity thin-wall integral centrifugal impeller of the aerospace engine, in particular to the machining of a centrifugal impeller of a high rotation speed engine used in an aerospace vehicle, an ultra-thin multi-curved surface blade with thickness of 1.2mm can be machined, the blade does not deform during the machining process, the residual height of a hub is ensured, the knife mark in the direction of air flow is machined; meanwhile, the extremely high coaxiality of inner holes in the two end surfaces of the hub and the micron accuracy of the machining of the inner holes in the large end surface of the hub can be ensured, and the requirements of very high dynamic balance, dimensional accuracy and shape and position tolerance of parts can be met.

The invention relates to the field of iron casting, provides a tool for detecting mould outline curvature radius for large-scale casting production, and mainly solves the problems in manual manufacture and detection of large-scale moulds that measuring benchmark and process benchmark are difficult to align, and the overall dimension and the form-position tolerance are overproof. The tool can improve the whole outline curved surface precision by controlling the curvature radius on a related outline cross section curve, so as to ensure smooth transition of intersected surfaces, aesthetic appearance, and designed wall thicknesses of all parts, and meet the requirements on casting size, form-position tolerance, weight and appearance of a design graph.

The invention provides a thin-walled vane nine-point control variable-allowance milling method based on Newton interpolation. Modeling is carried out by utilizing a three-dimensional modeling software, and an auxiliary surface and a boundary surface are formed, so that a driving surface is determined by utilizing a section line lofting process. Cutter machining paths are generated according to the driving surface, and the machining allowance of each cutter position point on each machining path is determined by adopting a Newton interpolation method. Finally, vanes are cyclically processed according to symmetrical milling rules. Compared with a traditional longitudinal fixed-allowance cutting and spiral milling method, the thin-walled vane nine-point control variable-allowance milling method has the advantages that technical problems, such as large torsional deformation, low contour precision, poor section position tolerance and difficult error control, in the machining process can be solved; and by adopting a Newton interpolation process allowance fine adjustment method, surface quality can be more comprehensively controlled, and problems, such as large bending deformation, poor section position tolerance and low surface contour precision, in the machining process can be effectively solved.

The invention discloses a white car body top cover self-positioning tool which comprises a fixture base, wherein a top cover lower support angular seat is arranged on the fixture base; lateral limiting standard blocks are arranged on the top cover lower support angular seat, corresponding to two adjacent sides of the white car body top cover; and movable clamping mechanisms are arranged on the top cover lower support angular seat, corresponding to the other two adjacent sides of the white car body top cover. The pressing mechanism of the positioning tool is completed by adopting a telescopic mechanism, and therefore, the assembly space of components is effectively increased, functions of quick assembly and clamping are achieved, and the operation is simple and convenient; and an elastic mechanism with a spring is arranged in the pressing mechanism, so as to absorb component assembly defects caused by external dimension tolerance and arrangement position tolerance of the components, thus being accurate and reliable in positioning.

The invention discloses a manufacturing method for a motor shell body. The method includes the flowing steps: S100, pre-machining a central hole of a motor base; S200, fixedly connecting the motor base with either end cover, taking the axis of the central hole as a standard to machine a circle of an externally connected stopping opening of the fixedly connected end cover, and taking the end face of the motor base as a standard to machine an externally connected stopping opening end face of the externally connected stopping opening of the end cover; S300, fixedly connecting the motor base with the other end cover, taking the axis of the machined circle of the externally connected stopping opening as a standard to machine bearing installation holes of two end covers and a circle of an externally connected stopping opening of the other end cover, and taking the machined end face of the externally connected stopping opening as a standard to machine an end face of the externally connected stopping opening of the other end cover. Compared with the prior art, the manufacturing method for the motor shell body enables the motor shell body to have a high-precision form and location tolerance, an assembled motor can still meet requirements of the high-precision size and the shape position tolerance even under the condition that assembling errors exist in an accumulated assembling process, the repairing rate of the motor shell body is reduced, abrasion of a motor in the running process is reduced, and the service life of the motor is prolonged.

The invention discloses a method for selecting and matching complex mechanical products based on genetic algorithm, which comprehensively considers shape and position tolerance and dimension tolerance, through the coding method of complex dimension chain, the assembly problems of complex mechanical products are mapped into mathematical models, assembly accuracy and assembly success rate are used as the evaluation indexes of quality requirements, a comprehensive optimization model of selection and matching under the multi-quality requirements is established, by using the effective characterization form of the measured values of geometrical tolerances in the selection, the optimization model of geometrical tolerances and dimensional tolerances is established, Based on Pareto intensity and density as fitness evaluation criteria of genetic algorithm, the algorithm is improved by introducing the priority of parts and the priority of quality requirement. The method not only realizes the selection and matching of complex mechanical products, improves the success rate of assembly, ensures the assembly accuracy, ensures the dimensional tolerance assembly accuracy, but also effectively reduces the shape and position tolerances of products, and the genetic algorithm with the priority of selection and matching has a better convergence speed.