219results about How to "Improve manufacturing level" patented technology

An image centralizing location method for automatic tube plate welding is characterized in that a camera is used for picking up the image of the mouth of a tube to be welded; the image is then processed and recognized by a computer system to automatically find the center position of the tube to be welded; and finally, the rotary axial line of a welding torch is translated to the center position of mouth of the tube to be welded by an X-axis moving mechanism and a Y-axis moving mechanism to achieve the location. The method can achieve location of the tube plate by using the image centralizing location method without the need of a core rod and an expansion core, so that the method is a contactless accurate location method, which solves the difficult location problem always puzzling the people for a long time. The method has the following characteristics: (1) the method obviates the position error of the tube mouth caused by machine tooling and welding heat and has high location accuracy; (2) the method can achieve the welding of tube plates with the retracted tubes; and (3) the method can achieve the welding of tube plates with a small diameter (phi3 mm), thereby greatly widening the application range of tube plate welding.

A system and method for monitor that construction and service phases of an assemble building is disclosed, Taking the BIM construction operation control module as the core, by establishing the three-dimensional BIM model of prefabricated building components, the whole process of prefabricated component fabrication, construction, operation and maintenance can be monitored dynamically, and the decision makers and managers can master the whole process, and the electronization and informationization management of prefabricated building can be realized based on the BIM model. BIM-based three-dimensional model of prefabricated components and related information, to achieve the information management of the quality, size and assembly accuracy of prefabricated components, to improve the manufacturing level of assembled building prefabricated components; Based on BIM technology, it can improve the construction level of assembled building and ensure the safety, rationality and effectiveness of the construction process. It can dynamically monitor the operation period of assembled buildings, timely discover relevant diseases and effectively prevent and treat them, and invoke relevant documentsto find out the crux and attribution, so as to achieve efficient management of the operation period of assembled buildings.

The invention relates to an electron beam welding method for a variable-section gas turbine casing, relating to a welding method for a gas turbine casing and solving the problem that the existing welding method for a cylinder and a horizontal flange of the same section in the gas turbine casing cannot meet welding requirements for the cylinder and the horizontal flange of the variable section. The method comprises: 1, selecting an electron beam welding machine; 2, cleaning; 3, arranging the cleaned casing and a tool clamp onto a workbench in a vacuum chamber of the welding machine, assemblingthe casing onto a tool, positioning two variable-section horizontal flanges and a cylinder, and carrying out spot welding; and 4, carrying out electron beam welding. The multi-section welding is adopted for the variable-section horizontal flanges with different thicknesses, the welding of the horizontal flanges of different thicknesses for the variable-section casing can be realized through adjusting and selecting the current, voltage, gun distance and other parameters of the welding machine, and the product quality and the production efficiency can be improved greatly. The method can be applied in welding of the variable-section gas turbine casing.

The invention relates to a method for evaluating geometrical error of a compound spatial moulding surface, belonging to the field of mechanic parts geometrical error evaluation. The method comprises the following steps: (1) a three-dimensional CAD model of a work piece to be evaluated is read and an ideal work piece model is reconstructed; (2) geometrical data of the work piece to be evaluated is measured to obtain the coordinate information of each measured point; (3) the error value of the measured moulding surface is calculated according to the geometrical error evaluation items of the work piece to be measured including spatial straightness accuracy, cylindricity and punch combination compound position; and (4) the error evaluation result is compared with the read ideal work piece model for analyzing, the processing error information is displayed by adopting colour cloud points, and the error evaluation report is obtained finally. The invention, by the approaching process for constructing minimum zone, realizes fast and accurate evaluation on the geometrical error of the compound spatial moulding surface.

The invention relates to boron microalloyed die steel and a preparation process thereof and belongs to the technical field of alloy steel preparation processes. The main alloy elements in alloy chemical components of the die steel comprise, by mass, 0-0.20% of C, 0-0.20% of Si, 1.20-1.60 of Mn, 1.10-1.50% of Cr, 0-0.30% of Ni, 0.20-0.35% of Mo, 0-0.10% of V, less than 0.015% of P, less than 0.005% of S, 0.005-0.01% of B, and the balance Fe. The preparation process of the steel includes the following steps of conducting burdening, smelting, casting and hot delivery; conducting high temperature diffusion heat treatment, multi-directional forging hot working and post-forging hydrogen diffusion tempering treatment; and finally conducting quenching-and-tempering heat treatment so as to obtain a tempered martensite structure with the hardness being 32-38 HRC. The boron microalloyed die steel and the preparation process thereof have the advantages that the prepared die steel has low cost, high hardenability, high hardness, high polishing performance and high skin grain etching performance.

The invention provides a process for deep-cooling, embrittling and broken-expanding of a connecting rod of high-rigid alloy steel, relating to an improvement of the process for processing engine components. The process comprises the following steps of: a. putting the connecting rod in liquid nitrogen for deep cooling for more than 5 minutes; basically deep cooling of the connecting rod to a test piece core part after ending of heat exchange; and measuring temperature at a fracture of the cracked test piece same as surface temperature of the test piece; b. keeping the deep cooling temperature to be lower than 156 DEG C below zero; c. placing an expanding sleeve in a macropore of the connecting rod and fixing the connecting rod on an operating board of a pressure machine, and punching the expanding sleeve by an expanding head to expand the connecting rod to be broken. The process has the advantages of changing tractility of the connecting rod of a high-power engine, and ensuring radically no conversion of mechanical performance before deep cooling and after deep cooling through utilizing the deep cooling technology. The technology is popularized and used in the high-power engine manufacture field of our country, which can combine seven or ten steps of key steps of the process for producing the connecting rod into one or two steps, thereby reducing much precision equipment for carrying out precise broaching and form grinding and so on.

Applying KBE, CBR etc. knowledge design, modularized and variable techniques, the method is built based on 3D CAD platform. The method includes following steps: (1) based on userí»s need, creating main parameters for preliminary design; (2) based on the said parameters, searching database to see whether there are products to meet userí»s need; (3) based on design scheme of functional module in the said products, searching structure instance of functional module in the said products to determine whether there is similar structure instance of functional module in the said products; (4) whether ANSYS finite element analysis is carried out for the said functional module; (5) based on structure of functional module, carrying out process planning, generating technological process sheet and operation sheet; using CAM subsystem generates NC machining codes for making module structure needed of using digital control machine-tool.

The invention discloses a microfluidic chip injection molding process capable forming a micro-channel structure on the surface, which belongs to the technical field of injection molding. The appearance of the formed microfluidic chip is in a plate structure, and the thickness thereof is generally 1.2 to 1.5mm; the chip is provided with the crisscross micro-channel, and the cross section thereof is a rectangle with the depth of about 50mu m and the width between 30 to 100mu m. PMMA raw material is selected, the mold temperature is 85 to 90DEG C, and the melt temperature is 230 to 250DEG C. The injection speed is in a control method of slow-quick-slow, wherein the speed of a high-speed section of about 140mm/s. The injection pressure is 100 to 130MPa, the holding pressure is 50 to 70MPa, the holding time is 2 to 5s, and the cooling time is 30 to 40s. After cooling, the mold is opened, a product is taken out to complete the whole forming process. The invention has the beneficial effects that the injection forming process can form plastic microfluidic chips with high efficiency in a large scale, effectively solves the technical difficult problems of incomplete replication of the micro-channel and the like during the forming process, and promotes the application of an injection molding technology in the micro-mechanical system field.

The invention relates to a highly-polished prehardened die steel, and a preparation method thereof. The highly-polished prehardened die steel is composed of, by mass, 0.21 to 0.25% of C, Si<=0.30%, 1.40 to 2.00% of Mn, 1.30 to 1.70% of Cr, 0.60 to 1.00% of Ni, 0.40 to 0.60% of Mo, V<=0.10%, P<0.015%, S<0.005%, 0.02 to 0.04% of Nb, and the balance Fe. The preparation method comprises following steps: material blending, smelting, casting, and hot charging; high temperature diffusion heat treatment, multi-directional forging heat processing, after-forging heat treatment, and sawing; and hardeningand tempering heat treatment. The hardness of the obtained tempered martensite structure ranges from 38 to 42HRC. The advantages of the highly-polished prehardened die steel are that: cost is low, hardenability and hardness are high, and polishing properties and cleavage line etching performance are excellent.

The invention discloses a bench test system and test method for an air conditioner cutting condition and a whole vehicle braking condition. The bench test system comprises a host computer, a data acquisition device, an environment simulation cabin, a chassis dynamometer, a test vehicle and also comprises an engine outlet water temperature sensor, an engine inlet water temperature sensor, an engine oil temperature sensor, an air conditioner blowing surface air outlet air temperature sensor, a compressor air discharge pressure sensor, a compressor air suction pressure sensor, a cooling fan voltage sensor and a compressor clutch voltage sensor which are electrically connected to the data acquisition device. The host computer is electrically connected to the data acquisition device and an ECU of the test vehicle. The test method comprises the steps of carrying out test vehicle access inspection, laying each sensor and connecting wires, fixing the test vehicle and connecting wires, setting a simulation environment, preheating the test vehicle, simulating the breaking condition to drive and collecting data, and recording and analyzing the data. According to the system and the method, the test universality and the comparability of a test result can be improved.

The present invention relates to production process of medium chromium tungsten-containing composite antiwear roller ring, and belongs to the field of high performance cast iron alloy material and casting producing technology. The production process includes centrifugal composite casting and heat treatment. The composite roller ring has one outer layer of medium chromium tungsten-containing cast iron alloy comprising Cr 12-20 wt%, W 1.0-3.0 wt%, C 2.2-3.4 wt%, Cu 0.6-1.5 wt%, Mn 0.4-1.4 wt%, Ce 0.1 wt%, Si not more than 0.7 wt%, P not more than 0.1 wt%, S not more than 0.06 wt% and Fe for the rest; and one inner layer of high strength nodular cast iron. The composite roller ring has the advantages of high wear resistance, less internal stress, high toughness, long service life and low production cost, and is suitable for use in crushing coal gangue and other hard material in brick making industry.

The invention belongs to the field of spectrum technology, and relates to a method for adjusting a real-time monitor device in the exposure path of a concave holographic grating. According to the technical scheme, the method comprises the following steps: (1) establishing a set of concave holographic grating exposure device; (2) resetting the holographic grating in the concave holographic grating exposure device to a position on which the original grating substrate is placed, and adjusting the position of the holographic grating to a position of the grating substrate by an optical interference method; and (3) irradiating the holographic grating with a monitoring beam emitted by a He-Ne laser, and placing a photoelectrical detector on the emergent light axis direction of the diffracted beam of the He-Ne laser. The method can accurately adjust the real-time monitor device in the exposure path of the concave holographic grating, and has the important value for improving the concave holographic grating fabrication technique.

The invention discloses a gear measuring system with high measurement accuracy, a gear measuring method and a special handheld movable optical reverse reflector. The global measuring equipment of the system adopts a multi-path laser interference tracking system which comprises at least three laser interference tracking instruments, a handheld movable optical reverse reflector and a fixed optical reverse reflector, wherein the handheld movable optical reverse reflector is used in match with at least three laser interference tracking instruments so as to carry out the space positioning on a gear to be measured, the fixed optical reverse reflector is used for rigid connection with the movable part of front-end measuring equipment, and the handheld movable optical reverse reflector comprises a reflector and a positioning structure which is connected with the reflector and used for driving the handheld movable optical reverse reflector to move on the datum of the gear to be measured along a special direction. The measuring system and the measuring method can be used for accurately measuring an oversize high-accuracy gear with the diameter of 3000-10000 mm, the minimum modulus of 6 mm and the accuracy at 6 level or above and improve the manufacture level of the oversize high-accuracy gear.

The invention provides a cloud animation production method which is used for producing person models in a Maya scene. The cloud animation production method comprises the steps that (1) an ordinary basic model of a person is generated, (2) a person model is set, (3) binding and skinning are conducted on the person model, and (4) the person model is made to execute actions according to action information stored in a database. According to the cloud animation production method, a person modeling system with Maya as an implementation platform is adopted, and the method can help animation personnel accomplish animation production.

The embodiment of the invention discloses a multi-hole parameter detection system and a detection method, which relate to the technical field of hole detection for simply and conveniently realizing detection on hole diameters, the roundness and the coaxiality. The multi-hole parameter detection system comprises a laser transmitter, a mounting assembly, a laser receiving device and an angle measuring device, wherein the laser receiving device is retractably arranged in a to-be-detected hole of a detected workpiece through the mounting assembly; the laser receiving device can receive laser transmitted by the laser transmitter; and the angle measuring device can measure the rotating angle of the laser receiving device. By adopting the above multi-hole parameter detection system, multiple parameters such as the hole diameters, the roundness and the coaxiality can be detected, and detection on multiple hole parameters by one system can be realized.

The present invention relates to production process of high chromium tungsten-containing composite antiwear roller ring, and belongs to the field of high performance cast iron alloy material and casting producing technology. The production process includes centrifugal composite casting and heat treatment. The composite roller ring has one outer layer of medium chromium tungsten-containing cast iron alloy comprising Cr 12-20 wt%, W 1.0-3.0 wt%, C 2.2-3.4 wt%, Cu 0.6-1.5 wt%, Mn 0.4-1.4 wt%, Ce 0.1 wt%, Si not more than 0.7 wt%, P not more than 0.1 wt%, S not more than 0.06 wt% and Fe for the rest; and one inner layer of high strength nodular cast iron. The composite roller ring has the advantages of high wear resistance, less internal stress, high toughness, long service life and low production cost, and is suitable for use in crushing coal gangue and other hard material in brick making industry.

A microfluidic control chip injection molding die belongs to the technical field of the injection molding die. The injection molding die comprises an injection die die-set part and a cavity insert. The injection die die-set uses a two-plate type injection die die-set; the cavity insert comprises a fixed die insert, a moving die insert and a micro machining insert. The fixed die insert is arrangedin a fixed die plate in a matching way and connected by a bolt; the micro machining insert of a microchannle of a molding chip is arranged in the fixed die insert in the matching way and connected with the fixed die insert; the moving die insert is arranged in a moving die plate in the matching way and connected by the bolt; after compound die, a cavity is formed between the micro machining insertand the moving die insert. The side structure of the cavity of the moving die insert is designed to be a rectangular through groove and has the same size with the chip products. The moving die plateadopts lengthening cross gate and stream-line fan gate design. The injection molding die can mold plastic microfluidic control chip with high efficiency on a large scale, further increases the manufacture level of the microfluidic control chip and promotes the application of the injection molding technology in the micro machinery system field.