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introduction：yuandu celiang Roundness measurement roundness measurement Measurement of roundness errors in length measurement techniques。Roundness is measured by rotating axis method、Three-point method、Two-point method、Projection method and coordinate method。 The rotating axis method uses the circular trajectory formed by one rotation of the shaft in the precision shafting（Ideal circle）Compare with the measured circle，The difference in the radius of the two circles is converted into an electrical signal by an electrical length sensor，After circuit processing and computer calculation, the roundness error is indicated by the display instrument，Or recorded by a recorder
2014-12-25 Reading quantity 2908
introduction：So thatIKOThe bearing can maintain its due performance and be used for a long time under good conditions.Must match 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。]Check and maintain，Inspection and maintenance are important to prevent failure，In operation, the bearing should be checked[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）
2014-12-25 Reading quantity 1605
introduction：1、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。]Parts are not allowed to crack、Sharp edge、Burrs and rusts；The raceway shall not have the processing marks of the previous process；Inner and outer rings、The super fine grain of the steel ball working face should be uniform，No bruising allowed、Be injured by a collision； 2、bearing[bearing:bearing（“Bearing”，Japanese person“shaft
2014-12-25 Reading quantity 1537
introduction： 【one】、Size limitation。usualTIMKENbearing[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 space that can be installed is limited。In most cases，Shaft diameter（orTIMKENbearing[bearing:bearing（“Bearing”，Japanese person“
2014-12-25 Reading quantity 1520
introduction： Abstract The origin of high pressure water jet processing technology is discussed、Cutting mechanism，The basic principle and application range of obtaining high pressure water jet are also introduced。 keyword High tension Water jet Cutting mechanism 1. Origin of water jet processing technology “Dripping water wears away a stone”It reflects the potential power of water itself, which is considered to be weak in nature，however，As an independent and complete processing technology，High pressure water jet(WJ)、Abrasive water jet(AWJ)But it happened in the last 30 years，the
2014-12-25 Reading quantity 2865
introduction：1、load 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。]The type is selected according to the load（Radial direction、Axial direction、Moment of force）Types and functions inIKOImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing
2014-12-25 Reading quantity 1521
introduction：Thrust ball 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。]The life of the revolution(Or the number of working hours at a given speed)，definition：Within this lifetimeTIMKENbearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is the part that fixes and reduces the friction coefficient of load in the process of mechanical transmission
2014-12-25 Reading quantity 1617
introduction：Use different kinds of steel for plastic molds，Its chemical composition and mechanical properties are different，Therefore, the manufacturing process route is different；same，The heat treatment process used by different types of plastic die steel is also different。This section mainly introduces the manufacturing process route of plastic mold and the characteristics of heat treatment process。 one、Plastic mold manufacturing process route 1.Low carbon steel and low carbon alloy steel mold Such as，20，20Cr，20CrMnTiThe process route of such steel is：laying-off→Forging blank→anneal→Mechanical roughing→Cold extrusion forming→Recrystallization annealing→Mechanical finishing→carburizing→quench、temper→
2014-12-25 Reading quantity 2893
introduction： Light produced by stimulated emission。A device that amplifies or oscillates light waves by stimulated emission﹐Called laser。Since the development of the ammonia molecular maser and the Ruby microwave quantum amplifier﹐A new discipline was formed──Quantum electronics。Quantum electronics succeeded in the microwave segment﹐Prompted American Townes﹐C.H.andA.L.Schawlow﹑Basov﹐..And Prokhorov﹐..It is proposed that similar devices can also be constructed in the optical band。1960years﹐AmericaT.H.mayman
2014-12-25 Reading quantity 2875
introduction：rightINAbearing[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。]Regular maintenance of equipment、One-way bearings that are removed during operation and replacement of peripheral parts[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
2014-12-25 Reading quantity 1589
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