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The semiconductor monocrystalline silicon material is subjected to external forces，Creates extremely small strains that the naked eye cant even detect，The energy state of the electrons inside its atomic structure changes，Which causes a drastic change in its resistivity，The resistance made of its material changes dramatically，This physical effect is called piezoresistive effect。Humans only began to discover and study the application value of this effect in the 1950s。Using the piezoresistive effect principle，Three-dimensional integrated circuit technology and some special processes are adopted，Specific crystal orientation on a monocrystalline silicon wafer，A Whiston test bridge composed of strain resistance is prepared，And at the same time harnessing the elastic forces of silicon
The structure characteristic and principle of clutch one、Structural characteristics‘The pneumatic booster of the automobile clutch is arranged in the hydraulic control mechanism，A compressed air source is shared with pneumatic braking systems and other pneumatic equipment。It is mainly controlled by air pressure valves、Hydraulic cylinder、Power piston、The shell is composed of four parts。To enable the driver to sense and control the degree of clutch disengagement or engagement at any time，The output force of the pneumatic booster is an increasing function with the travel of the clutch pedal。In addition，When the pneumatic booster system fails，We can also guarantee the use of manpower
FAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The application material is embodiedFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The performance is basic，therefore，Top in the worldFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]All adopt
Using radiation from light﹑Principles of dispersion and absorption﹐An optical analytical instrument for qualitative and quantitative analysis of the composition and content of a substance。The composition of distant celestial bodies can be detected by spectroscopic analysis﹐It can detect molecules﹑The mysteries of the microscopic world like atoms﹐In astronomy﹑They played an important role in the creation and development of quantum mechanics and photon theory。Spectroscopic instruments in metallurgy﹑geology﹑Chemical engineering﹑medicine﹑ocean﹑Environmental protection﹑semiconductor﹑Biomedical science﹑It is an important instrument in many fields such as space exploration and isotope application。 Working principle According to spectroscopy
1.Remove the meaning of wet：Dehumidification refers to the operation of removing moisture or organic solvents from wet materials being processed。 2.The way to get wet： Mechanical dehumidification：Finger filter，suction，sedimentation，Centrifugal separation and other mechanical methods to remove moisture，Dehumidification is not complete。 Physicochemical dehumidification：anhydrousCaCl2，strongH2SO4Etc. as a desiccant to remove moisture，High cost。 Thermal dehumidification：The operation of dehumidifying a material by vaporizing the wet parts and discharging steam by means of thermal energy，Also called drying，Complete dehumidification。 3.Drying principle The drying process mainly transfers water from the solid phase to the liquid phase
A small analog display instrument。Moving-coil instruments are often paired with thermocouples、Thermal resistance and other coordination，To measure、Monitor and control temperature。Its measuring body is based on the FrenchA.deD Arsonvalyu1882The galvanometer principle proposed in the year was designed into。A movable coil wound by a thin wire is supported by a metal wire or shaft tip in the gap of the pole shoe of a permanent magnet（See picture[Moving-coil instrument]）。When the current passes through the moving coil, the induced magnetic field interacts with the permanent magnetic field to produce a torque,Drive coil deflection,Deform a tensioning or hairspring to produce a reverse torque，When the two moments are balanced, the pointer is stable at a certain position。The size of the pointer Angle
Made of abrasives, etc﹑Small diameter consolidated abrasives for use with handles。The grinding head is rotated at high speed on a machine tool or hand-held tool﹐Mainly used for grinding the inside and outside profile of the profile﹐Such as grinding all kinds of die。Cylindrical grinding heads can be used to grind inner holes。Depending on the structure and manufacturing method﹐There are two types of grinding head﹕Abrasives and binders are mixed﹑Pressing and sintering(Or harden)Grinding head﹐It has a blind hole at the end﹐Then install a steel handle on the blind hole and use it。The grinding head is divided into cylinders according to its head shape﹑Truncated cone﹑60°cone﹑Round nose cone﹑Elliptic cone﹑hemisphere
Injection molding machine in the mechanical structure is mainly divided into injection part and mold locking part。The function of the injection part is to melt the plastic and inject it into the mold cavity，The function of the clamping part is to control the opening and closing of the mold、Ejecting products and other actions。 1、Injection part There are two main forms of injection：Piston type and reciprocating screw type。Nowadays, piston injection molding machines are very rare，No introduction is given here。 The reciprocating screw injection molding machine rotates through the screw in the heating cylinder，Put solid plastic particles(Or powder)Melt and mix，Squeeze into the front cavity of the barrel，then
ABS acrylonitrile-butadiene-Styrene copolymer Typical application range: CARS（Instrument board，Tool hatch door，Wheel cover，Mirror box, etc），refrigerator，High-strength tool（Hair dryer，stirrer，Food processor，Lawn mowers, etc），Telephone housing，Typewriter keyboard，Recreational vehicles such as golf carts and jet sledges。 Injection molding process conditions: Drying treatment：ABSThe material is hygroscopic，Require drying prior to processing。Recommended drying conditions for80~90CMinimum drying2Hour (s)。The material temperature should be less than0
(1)Popularize perfect lubrication knowledge to establish oil film 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。]New maintenance concept，Establish that lubrication is people-oriented，Lubrication is oil film bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission
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