19100results about How to "Improve machining accuracy" patented technology

A thin film transistor of the present invention includes a semiconductor thin film (8); a gate insulating film (7) formed on one surface of the semiconductor thin film (8); a gate electrode (6) formed to be opposite to the semiconductor thin film (8) through the gate insulating film (7); a source electrode (15) and a drain electrode (16) electrically connected to the semiconductor thin film (8); a source region; a drain region; and a channel region. The thin film transistor further includes an insulating film (9) formed on a peripheral portion corresponding to at least the source region and the drain region of the semiconductor thin film (8), and having a contact hole (10, 11) through which at least a part of each of the source region and the drain region is exposed wherein the source electrode (15) and the drain electrode (16) are connected to the semiconductor thin film (8) through the contact hole (10, 11).

The invention discloses a thin-wall round pipe turning and clamping device. The thin-wall round pipe turning and clamping device comprises a slide block bracket for slidingly mounting inclined surface slide blocks, a screw rod for slidingly mounting and supporting taper sleeves, and a clamping base, wherein the slide block bracket and the screw rod are both fixedly mounted at one end of the clamping base; the taper sleeves are slidingly mounted on the screw rod; at least two inclined surface slide blocks fitting the taper sleeves to tightly eject workpieces from the inner sides are slidingly mounted on the slide block bracket; elastic cushion blocks are respectively arranged between all the inclined surface slide blocks and the workpieces; fastening nuts for tightly pressing the taper sleeves are arranged at the ends of the screw rod; and antiskid washers are arranged between the fastening nuts and the end surfaces of the taper sleeves. The thin-wall round pipe turning and clamping device has the characteristics of reasonable design, simple structure, good use effect, high machining precision, convenience for disassembly of the workpieces, low labor intensity, high production efficiency, low production cost and convenience for promotion and application.

Graininess reduction processing is carried out with accuracy by finding a degree of graininess in an image. For this purpose, a parameter acquisition unit obtains a weighting parameter for a principal component representing the degree of graininess in a face region found in the image by a face detection unit, by fitting to the face region a mathematical model generated by a method of AAM using a plurality of sample images representing human faces in different degrees of graininess. A parameter changing unit changes the parameter to have a desired value. A graininess reduction unit reduces graininess of the face region according to the parameter having been changed.

A system for analyzing language using supervised learning method. The system extracts portions matching the structures of problem expressions from a raw corpus that is not supplemented with analysis information, then converts the extracted portions corresponding to the problem expressions into supervised data including problems and solutions and stores in the data storage. The system extracts sets of solutions and features from the supervised data stored in the data storage, carries out machine learning processing using the sets and stores learned results as to what kind of solution is the most straightforward for which feature in the learning results database. The system then extracts sets of features from the inputting object data, extrapolates analysis information showing the most optimum for a certain feature, from the sets of features based on the learning results database.

A dental multi-color machinable zirconia ceramic and its preparation method. The zirconia ceramic has the characteristics of translucence and color gradient, and contains more than five porcelain layers with the same hue and different saturation. The lightness gradually decreases from the top of the ceramic to the bottom layer, and the saturation The density gradually increases, and the color transitions naturally with a sense of hierarchy; the pre-sintered porous ceramic body of the zirconia ceramic is easy to cut and shape, and can be used to make personalized and beautiful dental zirconia all-ceramic restorations through the CAD / CAM system, which is conducive to preserving the abutment teeth. Improve the repair success rate. The preparation method of the dental complex color machinable zirconia ceramic is simple, effective and easy to popularize.

The invention discloses an integrated workstation based on robot cutting, welding and carrying in pipe processing. The integrated workstation comprises a headstock and tailstock position changer, a movable support, a welding robot, a cutting robot, a middle sliding rail and two side sliding rails, wherein the headstock and tailstock position changer comprises a headstock base and a tailstock base; a pipe workpiece is clamped between clamping and fixing devices on the headstock base and the tailstock base; a lifting driving device is installed on a sliding base of the movable support; a roller is installed on the lifting driving device and is tangent with the pipe workpiece; the welding robot and the cutting robot are slidably installed on the two side sliding rails on the two sides of the pipe workpiec respectively to finish carrying, cutting and welding operation and the like. The integrated workstation based on the robot cutting, welding and carrying in pipe processing is an integrated working system, can ensure good consistency in pipe processing, improves the processing quality and the processing precision of the whole pipe workpiece, and is simple in structure, less in equipment and small in occupied area.

The invention discloses a trajectory regeneration compensation method of numerical control machine error. The method comprises the steps that: at first, a temperature sensor is arranged on a numerical control machine to measure geometrical error and thermal error of the machine, and then a machine error model is established; second, an error compensation controller diverges a numerical control trajectory to be processed and reads data from the temperature sensor; afterwards, the error compensation controller substitutes a node coordinate subsequent to divergence and temperature data in the machine error model to obtain an error to which the coordinate is corresponding, the error is then superposed on the coordinate of the node, and the numerical trajectory is reconstructed according to the corrected coordinate; and finally, the error compensation controller transfers the reconstructed trajectory to numerical control system for being processed, so as to realize the compensation for numerical control machine error. Compared with other compensation methods, the method according to the invention has the advantages of great flexibility and convenience, strong adaptability and no need of changing numerical control system, etc.

A watch is offered in which the life of the threadedly engaged portion between the stem pipe and the crown can be improved and which has an internal thread capable of being machined relative to the crown easily and accurately. The watch is based on a watch in which the crown is threadedly locked to a stem pipe mounted to a barrel. The stem pipe has a barrel outside protruding portion provided with an external thread. The crown has a crown shaft and a crown ring having an internal thread removably threaded to the external thread, the ring being connected to the crown shaft. The crown shaft has a barrel insertion cylindrical portion which is smaller in diameter than the crown ring and inserted in the stem pipe and a ring connection portion mounted integrally with this cylindrical portion and connected to one end portion of the crown ring.

The invention discloses an online milling deformation measurement and complementation machining method for a thin-walled part. The online milling deformation measurement and complementation machining method for the thin-walled part comprises the steps that 1, a three-dimensional model of the thin-walled part is established, and a numerical control code is obtained; 2, measurement point locations are extracted from the three-dimensional model; 3, based on the model, a measurement path is planned; 4, rough machining and semi-precise machining are conducted on a workpiece blank; 5, online measurement is conducted, and the coordinate values of all the planed measurement point locations are obtained; 6, the obtained coordinate values of the planed measurement point locations are compared with those of the corresponding point locations on the three-dimensional model of the thin-walled part, and the difference between the coordinates of each point location of the actually machined workpiece and those of the corresponding point location on the three-dimensional model is calculated; 7, according to the machining differences, a complementation factor optimal machining path is generated according to the machining differences, precise machining is conducted according to the path, and then the final deformation deviation and the compensation values are obtained. By the adoption of the online milling deformation measurement and complementation machining method, semi-precise machining and precise machining are adopted, the identical machining parameters are adopted by the semi-precise machining and the precise machining, and the best precise machining compensation effect of the thin-walled parts which are made of the same materials and have the same characteristics can be achieved to the greatest extent through only one group of tests.

Disclosed are: an etching solution for a multilayer thin film having a copper layer and a molybdenum layer contained therein; and a method for etching a multilayer thin film having a copper layer and a molybdenum layer contained therein using the etching solution. Specifically disclosed are: an etching solution for a multilayer thin film having a copper layer and a molybdenum layer contained therein, which comprises (A) hydrogen peroxide, (B) an inorganic acid having no fluorine atom, (C) an organic acid, (D) an amine compound having 2 to 10 carbon atoms and also having an amino group and a hydroxy group in the total number of two or more, (E) an azole, and (F) a hydrogen peroxide stabilizer, and which has a pH value of 2.5 to 5; and an etching method using the etching solution.

The invention relates to an optical part magnetic rheologic precise polishing system and a method; magnetic rheologic liquid which flows out of a liquid storage cylinder is pressurized by a peristaltic pump and then enters a polishing head through a rotating connector and a guide pipe; the clearance between a workpiece and the polishing head is fully filled by the magnetic rheologic liquid; under the action of electromagnetic field, the magnetic rheologic liquid is transformed from the liquid state to the half-solid state so as to form a flexible grinding head used for polishing. The polishing head of the invention is not directly contacted with the workpiece; the polishing heads with different shapes and specifications can be replaced according to the processed workpiece; a computer automatic control device can realize the viscousity control and the temperature control of the magnetic rheologic liquid, and different polishing efficiency and precisions can be obtained by changing the factors such as magnetic field and rotation speed, etc.; the method of the invention can process the curved workpieces and plane workpieces with different shapes, more particularly the ultra-precise polishing of the large plane optical parts; the system has the advantages of high processing efficiency, wide applicable range, high processing precision and convenient operation.

The invention is a kind of supersonic wave tangent line saw for hard and crisp material, which comprises the bed, longitudinal working slide flat, transversal work slide flat, piece bracket, diamond line saw, supersonic wave vibrating device, saw reciprocating motion mechanism and electricity control device, the supersonic vibrating device is fixed on the upper arm of the C type work bracket through screw, the electrical signal is transformed into mechanical vibration, and enlarges the amplitude through a pole, the diamond saw vibrates as wave, it generates reciprocating motion through cranked rod, C type work bracket, slide flat seat. The saw is in linear high frequency vibration state and reciprocating motion; the invention is simple and has a high productivity.

The invention discloses a method for compensating a central point of a double-turntable five-axis linked numerical control machining rotary tool. The method is characterized by comprising the following steps of: when a tool trace of a double-turntable five-axis linked numerical control system which machines a spatial complex curved surface is a straight line, discretely approximating the movement trace of the central point of the tool through line interpolation, starting a real time control protocol (RTCP) module, obtaining a normal plane compensation vector and performing projection to obtain a central point compensation vector and output displacement by using the RTCP module, and inputting a number axis center distance parameter to realize the compensation of a nonlinear movement error during the machining of the double-turntable five-axis linked numerical control system. The method can well inhibit the nonlinear movement error, so that the running efficiency of the numerical control machining equipment is improved, the numerical control equipment can perform high-precision and high-efficiency machining, the machining quality of parts can be remarkably improved, and the method has excellent application prospect in the field of mechanical engineering.

The invention discloses a numerical machine tool machining state multi-parameter online active monitoring system and an implement method thereof. The system and the method mainly solve the problems that state detection performance indexes of an existing numerical control machine tool are not comprehensive, and closed-loop control during the machining process can not be achieved. The numerical machine tool machining state multi-parameter online active monitoring system comprises a first sensor assembly arranged on a numerical control machine tool servo feeding unit, a second sensor assembly arranged on a main shaft unit, a third sensor assembly disposed on a cooling liquid circulating unit and a multi-channel synchronous data collecting PXI box used for receiving information of collected data. The multi-channel synchronous data collecting PXI box sends related collected state signals to a monitoring computer in real time for analysis, calculation, display and storage, the monitoring computer generates related control instructions according to abnormal or optimized machining state parameters, transmits the related control instructions to a numerical control system of the numerical control machine tool through an Ethernet bus and executes related active control instruments, and accordingly real-time adjustment and control of numerical control machining process states are finished.