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introduction： Material grade specification Heat treatment specification property Main use P20 board （See notes） quench820-870 temper
2015-01-06 Reading quantity 2889
introduction：Reducer is a mechanical transmission device in many fields of national economy，The product categories involved in the industry include all types of gear reduction machines、Planetary gear reducer and worm reducer，A variety of special drives are also included，Acceleration device、Speed regulating device、And various types of composite transmission devices, including flexible transmission devices。Products and services are related to metallurgy、coloured、coal、Building materials、boats、Water conservancy、electricity、Engineering machinery and petrochemical industries。 Released by the Prospective Industry Research Institute《2012-2016China reducer industry production and sales demand forecast and transformation and upgrading analysis report》reveal，2008Nian State
2015-01-06 Reading quantity 2795
introduction： Work to determine horizontal or vertical angles。It is often used in astronomical surveys﹑Geodetic survey﹑Topographic survey and engineering survey。The horizontal Angle is the Angle formed by the vertical projection of the direction line from a point to two objects on the horizontal plane。A vertical Angle is the Angle between the line of direction from a point to a target and a particular direction in the same vertical plane。Usually in a horizontal or zenith direction(The opposite of the plumb line)In a particular direction。The Angle between the horizontal direction and the target direction is called the altitude Angle。The Angle of elevation is tilted upward in the direction of the target﹐Angular value from0°to+90°﹔downdip
2015-01-06 Reading quantity 2801
introduction：1Engineering background introduction Rolling is the process by which a rotating roll brings material between the cracks and deforms it。The deformation near the end of the rolled piece is unstable，And in other parts，There is no sharp change in the condition along the rolling direction，Therefore, it is stable state。In rolling，Plastic deformation of materials、Friction between the roll and the rolled piece、Changes in temperature and microstructure in the material、Reduction rate during rolling、Width-thickness ratio and its influence on the quality of rolled pieces，These are very complex issues。There are many reasons that affect production efficiency and production quality，The laws and theories obtained from the field and experiments are difficult to repeat
2015-01-06 Reading quantity 1542
introduction： Clutch booster cylinder flameout what to do 1、Idle state，Step on the gas to rev2000turn，At first, you may need to step more and less to adjust to2000，proficient，kick2000turn。2、Steady on the gas2000turn，Slow release clutch，The car will go slowly，When youre not skilled，Slow down a little，Im sure it stays on。proficient，You can put it faster。(At the clutch joint，Speed will drop，Leave it alone，Dont move your foot on the accelerator)。 Start with normal practice：1、Just hit the gas pedal1500turn，2、Hit the accelerator1500
2015-01-06 Reading quantity 2893
introduction：Due to axle diameter and 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 size measurement of the seat hole is not accurate or the roughness of the mating surface does not meet the standard requirements，Resulting in excessive interference fit，makeNSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first company in Japan to design and produce shafts
2015-01-06 Reading quantity 1554
introduction：INAbearing[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。]Greases are usually expressed in terms of apparent viscosity or similar viscosity，When describing the viscosity of grease，Temperature and shear rate must be specified。A similar viscosity index can be used to control its low temperature flow and pumpability。 One of the important indexes to measure the low temperature performance of thrust ball bearing grease is low
2015-01-06 Reading quantity 1552
introduction： SKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]The sequence of superfinishing can generally be divided into three steps：cutting、Half cut、Finished finish。 The first step：SKFbearing[SKFbearing:
2015-01-06 Reading quantity 1467
introduction： one、PMMA（acrylic） 1、Percentage of contraction0.4%~0.7%，Easy to burn in case of fire，Flame near smokeless，The fire will smoke when it goes out，The flame is blue and yellow，Gives off a sweet, fruity taste，Light smoke，The fire still burns after it leaves，Downtime does not require cleaning with other materials。 2、Room temperature24Hours later，Absorb water0.3%，Bake if necessary75℃/2~4Hour (s)。Dry with raw materials2Hour (s)，When adding spout material or wet weather2~5Lunar baked3Hour (s)。 3、Mold temperature should be60℃，Jet nozzle≥5mm，Glue temperature210℃~270℃，Such as temperature2
2015-01-06 Reading quantity 2892
introduction： At high speed、Under high temperature conditions，FAGbearing[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。]Oil lubrication can be used when the grease lubrication is no longer suitable。Through the circulation of lubricating oil，It takes away a lot of heat。Viscosity is an important characteristic of lubricating oil，The size of the viscosity directly affects the fluidity of the lubricating oil and the thickness of the oil film formed between the friction surfaces，shaft
2015-01-06 Reading quantity 1532
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