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introduction：On the basis ofNSKTapered 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。]Formation mechanism of grinding metamorphic layer on working surface，The main factors affecting the grinding metamorphic layer are grinding heat and grinding force。Now lets take a look at theNSKCauses of tapered roller bearing failure。 1.NSKGrinding heat of tapered roller bearings
2015-02-17 Reading quantity 1479
introduction： Casting is to melt the metal into a liquid that meets certain requirements and pour it into the mold，Cooling set、After finishing, a predetermined shape is obtained、Size and properties of the casting process。Casting is one of the basic processes of modern machinery manufacturing industry。 Casting is a kind of metal hot working technology that human beings have mastered relatively early，Had an appointment6000History of the year。China is about BC1700～before1000Between the years has entered the heyday of bronze casting，The technology has reached a very high level。The Shang Dynasty of China875Kilo Simuwu square tripod，Zeng Hou Yi of the Warring States Period，The West Han Dynasty
2015-02-17 Reading quantity 2863
introduction：Prefix description of the code name： Material code： B- Carburizing steel C- Carburizing steel D- Carburizing steel H- High speed steel S- Stainless steel NACHIbearing[NACHIbearing:NACHIbearing,Its a kind of marker inNACHIHigh performance bearings for industrial machinery
2015-02-17 Reading quantity 1702
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]Its friction mechanism is significantly different from that of other bearings, The friction force depends mainly on the radial load、Swing frequency、Number of oscillations、Swing Angle、Contact surface temperature and surface roughness and other factors。Generally, deep groove ball bearings are in motion
2015-02-17 Reading quantity 1523
introduction：Consisting of two having the same outside diameter、Tooth profile、A precision Angle measuring tool composed of the end gear disc of the pitch(See Length measuring tool)。figure[1440Tooth multi-tooth indexing table]The shape of the multi-tooth indexing table。The upper gear plate is lifted during measurement，And rotate an Angle according to the basic value of the measured Angle，Then lower and reengage the lower gear disc,Compare the rotated Angle with the measured Angle,The error of the measured Angle can be measured。A multi-tooth indexing table is often combined with an autocollimator，Used to test polyhedral edges、Angle gauge block、Optical rotary table, etc，Or with a micrometer(See comparator)Equal combination，Used to measure the pitch error of high precision gear、Index plate
2015-02-17 Reading quantity 2922
introduction：Heating engine（The Stirling engine）The ideal thermal cycle，for19Scotsman of the centuryR.Sterling proposed，Hence the name。figure[The Stirling cycle-and-figure]-and-figure" class=image>The Stirling cycle is under pressure-let(-)Tuhe Wen-entropy (T-S)The representation on the graph。It is a reversible cycle consisting of two constant volume heat absorption processes and two constant temperature expansion processes，And the heat released by the constant volume heat release process is exactly absorbed by the constant volume heat absorption process。Heat engine at constant temperature(T1)The expansion process absorbs heat from a high-temperature heat source，And at constant temperature(T2)Heat to low temperature during compression
2015-02-17 Reading quantity 2803
introduction：This specification applies to the model and the productivity of the model machine type raw production The rate of Clearing time K363 2.7Tons of/when K364 Cylinder cover48a/when，Large balance arm80a/when 60minutes 1、Comply with casting equipment general operating procedures。 2、And you have to do it before you go to work： a、Check whether the speed handle is flexible，Then move the car at a slow speed，The shaking Angle should not be greater than90°С； b、Starting fan，Check whether the fan draws air，Whether the air duct is blocked，In case of blockage，Maintenance personnel should be notified to repair； c、Run a quick point test，Then run empty
2015-02-17 Reading quantity 2804
introduction：In general，NSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]The amount of grease filled in，Always in excess of the actual requirements directly involved in lubrication，Holder and bearing cover
2015-02-17 Reading quantity 1467
introduction：Cutting speed、The feed amount and the cutting depth are called the cutting parameters。They are important factors affecting workpiece processing quality and production efficiency。 Turning time，The linear speed at the maximum diameter of the workpiece machined surface is called the cutting speed，In order tov(m/min)expression。Its calculation formula： v=πdn/1000(m/min) Shizhong：d——Diameter of the surface of the workpiece to be machined（mm） n——Rotational speed of the lathe spindle per minute（r/min） Every turn of the workpiece，The distance traveled by the turning tool，Its called feed，In order tof(mm/r)expression；The turning tool removes each layer of metal
2015-02-17 Reading quantity 1554
introduction： 1、Miniature 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。]： every10～15The sleeve bearing goes into a plastic cylinder，every5～10A plastic tube goes into a cardboard box（Or bag、packaging）。 2、In the、Small bearing： Polythene film for multiple sets of bearings、External use
2015-02-17 Reading quantity 1459
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