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introduction：author：unknown source：CAD/CAM Computer-aided design (CAD) and computer-aided manufacturing (CAD) systems are a set of tools that integrate software，It can be used to prepare detailed works，Such as the generation of blueprints and post-processing procedures。And CNC program manufacturing，Shape milling can be done for complex shapes，Grooving and drilling。And in the computer aided manufacturing module，Geometric shapes can be constructed on any plane of a solid space、Generation of dimensioning and post-processing programs。This system can expand the ability to build geometric figures，Including surface construction and display，There is also the construction of ovals and glyphs。 1-1，Refer to：
2015-02-13 Reading quantity 2889
introduction：bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]After installation，To check that the installation is correct，An operational check is required。Small machines can be turned by hand，To make sure the rotation is smooth。Check items for foreign bodies、scar、Poor operation due to indentation，Due to poor installation，The torque caused by poor machining of the mounting seat is unstable，by
2015-02-13 Reading quantity 1549
introduction： An automatic or semi-automatic mechanism for loading the workpiece to be machined to the machining position on the machine tool and removing the machined workpiece from the machining position﹐Also known as automatic workpiece handling device。The blanking mechanism of most machine tool loading and unloading devices is relatively simple﹐Or feeding mechanism has the function of unloading﹐Therefore, the loading and unloading device of the machine tool is often referred to as the loading device。Machine tool loading and unloading device is an integral part of automatic machine tool。After semi-automatic machine tool is equipped with loading and unloading device﹐The processing cycle can be carried out continuously and automatically﹐Become an automatic machine。Machine tool loading and unloading device
2015-02-13 Reading quantity 2897
introduction： Plastic bellows due to material saving、Light weight and excellent physical and chemical properties，So in post and telecommunications、Urban architecture、Agricultural irrigation and highway drainage are widely used。 At present，Countries around the world in the production of plastic pipes，Bellows occupy an important position，Although the production of plastic bellows in China started late，But technically, it has reached or is close to the world level。Dalian Plastics Research Institute1989The double-wall bellows unit has been developed since this year，In China, the first successfully developed only advanced level of forming units，The cost is only about a quarter of the imported equipment，The performance is up to standard
2015-02-13 Reading quantity 2797
introduction：Valves with bellows as stem sealing components。It is often used in occasions where the valve stem seal is strictly required﹐For example, it is used in high vacuum situations and in the nuclear industry。The bellows are used to replace the stuffing box on the ordinary valve or to combine with the stuffing box﹐Can make the valve stem part without leakage﹐To prevent radioactive or valuable materials from leaking out﹐Or maintain a high vacuum。The bellows expand with the rise and fall of the valve stem﹐The maximum working pressure depends on the compressive strength and fatigue strength of the bellows。
2015-02-13 Reading quantity 2786
introduction：Application technology of bakelite powder injection，If can be controlled according to its performance characteristics，To improve the rate of finished goods；Reduce the working load of the injection machine；Reduce wear on the screw barrel；Shorten the molding cycle；Improving the appearance of the parts will help a lot。Reasonable use of injected bakelite powder can extend the service life of ordinary nitriding steel screw to8—12month，And improve the damage to the mold。 one、concept：The material must be fully melted and plasticized in the barrel by screw under appropriate temperature conditions，Make it present a good molten state and fluidity，Make it have the best injection molding process。The injection bakelite powder has good thermal stability of the barrel，12
2015-02-13 Reading quantity 2796
introduction： The setting of the pressure holding time is to control the time of the effect of the pressure holding，Insufficient setting of pressure holding time will result in product sizing、Weight instability。But the pressure holding time is set too long，It will also affect the forming efficiency。The appropriate pressure holding time is maintained until the gate solidifies，At the same time, the pressure holding size and the pressure holding time should be properly matched，Programmable pressure control can be maximized。 The pressure holding system is to seal the injector at the end of injection and to compensate for the shrinkage due to volume，Therefore, the pressure retention must be higher than the internal residual pressure。 Pressure holding time is set if stopped before the maximum effective pressure holding time，also That is, the holding time
2015-02-13 Reading quantity 3149
introduction： Since the United StatesIntelcorporation1971Year designed and manufactured4Bit gapaTrimmer chip since，in20Over many years，CPUfromIntel4004、80286、80386、80486Run toPentiumandPentiumⅡ，Digital slave4position、8position、16position、32Bit development to64position;Master frequency from a few megabits to today400MHzabove，approachGHz;CPUThe number of transistors integrated in a chip is determined by2000Jump to500More than 10,000;The scale of semiconductor manufacturing technology is determined bySSI、MSI、LSI、VLSI
2015-02-13 Reading quantity 2884
introduction：Infrared temperature measurement technology in product quality control and monitoring、Device online fault diagnosis、Security protection as well as energy conservation and other aspects are playing an important role。For nearly 20 years,Non-contact infrared thermometers have developed rapidly in technology,Continuous performance improvement,The scope of application is also expanding,The market share has increased year by year。Compared to contact thermometry,Infrared temperature measurement has a fast response time、non-contact、Safe use and long service life。 Baytek(Reiter)The companys non-contact infrared radiation temperature measurement products include portable、On-line type and scanning type three series,A variety of optional accessories and photos are also available
2015-02-13 Reading quantity 2772
introduction：Tapered roller bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]The installation of bearings connected with the pump shaft should pay attention to the following aspects： one、Bearing installation： Bearings must be installed in the dry、Carried out under clean environmental conditions。The mating surface of the shaft and housing should be carefully checked before installation、Convex shoulder end face、Groove and connection table
2015-02-13 Reading quantity 1544
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