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introduction：http://www.hljjsj.cn one、Design raw materials and data 1、Type of prime mover、specification、Rotational speed、power（Or torque）、Starting characteristic、Short-time overload capacity、Moment of inertia, etc。 2、Type of working machine、specification、use、Rotational speed、power（Or torque）。Working system：Constant load or variable load，Load diagram of variable load；Rev.、Braking and short-time overload torque，Starting frequency；Degree of shock and vibration；Direction of rotation。 3、Prime mover The connection between the machine and the reducer，Whether the shaft has radial and axial forces
2015-01-07 Reading quantity 2877
introduction：1New heating source In a new heating source，The heat source with high energy rate is the most eye-catching。The high energy rate heat source is mainly laser beam、Electron beam、Plasma arc, etc。High energy rate heat treatment is the use of high energy rate heat source to apply a very high energy density to the surface of the workpiece(10 3 ～10 8 w/cm 2 )，This results in a very fast heating rate(Can even reach10 11℃/s)，So in a very short time(1～10 -7S)，The surface layer of the workpiece to be treated is heated to a phase change temperature or molten state，Make physical and chemical changes，Then rely on the workpiece itself cold
2015-01-07 Reading quantity 1436
introduction：Foreign low noise sealed 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。]Grease is roughly divided into three categories：General purpose low noise motor bearing grease，Low temperature high speed bearing grease，High temperature long life low noise bearing grease。 1.General purpose low noise motor bearing grease In the bearing industry，The application of this grease
2015-01-07 Reading quantity 1454
introduction：(1)The resultant force of the force passes as far as possibleIKOAxis of bearing，This requires the point of application to be uniform, symmetrical and stable，Force is applied through a sphere or parallel to an axis。 (2)The size of the force should be smooth and even，Not to be impacted，This requires the use of oil pressure or tools that can apply smooth tension or pressure，When the hammer had to be used，It should also be cushioned by softer, non-chipping metals such as copper sleeves，Knock as gently as possible。It is best to use a copper rod or copper hammer for hammering。 (3)Avoid applying force through rolling elements，This requires the inner ring to be installed and removed(Shaft ring)Apply force through the inner ring，When installing and removing the outer ring)Apply force through the outer ring
2015-01-07 Reading quantity 1552
introduction：Deep groove 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 cage fracture is an accidental abnormal failure mode，Lets analyze it from the following five aspectsIKOReasons for fracture of bearing cage。 1、Poor lubrication of deep groove ball bearing：IKOThe bearing runs in an oil-poor state，Easy to form adhesive wear，Condition the work surface
2015-01-07 Reading quantity 1560
introduction：1、What is a frequency converter？ Frequency converter is a power control device that converts the power frequency power supply to another frequency by using the on-off action of power semiconductor devices。 2、PWMandPAMWhat are the differences？ PWMIt is EnglishPulse WidthModulation(Pulse width modulation)abbreviation，The pulse width of the pulse train is changed according to certain rules，A mode of adjusting the output and waveform。PAMIt is EnglishPulse AmplitudeModulation(Pulse amplitude modulation)abbreviation，It changes according to certain rules
2015-01-07 Reading quantity 2899
introduction： Rolling mill as the main body﹐A complete set of equipment for rolling metal billet into wood。The mill is the main machine of direct rolling of metal﹐It uses a rotating roll to press the blank﹐Cause metal to produce plastic deformation according to specified requirements(figure1 Rolling principle )。Rolling is the most productive﹑The lowest cost metal forming method﹐It is suitable for rolling strip or plate material with the same cross section or periodic changes﹔Special rolling mills can roll machine parts or their blanks as well as certain non-metallic materials。There are two main rolling methods: hot rolling and cold rolling。Hot rolling is rolling under the condition that the rolled parts are heated﹐To reduce rolling pressure﹔Cold rolling is done at room temperature﹐Can be
2015-01-07 Reading quantity 2802
introduction： Clearance isSKFbearing[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]An important factor in whether it works properly。Select the appropriate rolling bearing clearance，The load can be distributed reasonably among the rolling elements；Energy limiting axis（Or shell）The axial and radial displacements are guaranteed
2015-01-07 Reading quantity 1511
introduction： The working principle of the two-foot clutch is：Because we have to rush the car before we put it in gear，Rev up the engine，So when you first press the clutch pedal，Put the gear shift into neutral，Put your left foot down on the clutch pedal again，Synchronous action to hang the gear lever into the higher gear;Gradually lift the clutch pedal with your left foot，Synchronize the movement of the right foot gradually with the oil continue to rush the car，Left foot quickly lift the clutch pedal single action，Quickly depress the clutch pedal with your left foot，Synchronize movement right foot oil collection right hand off neutral，When the pole is in neutral，The first and intermediate shafts of the transmission rotate much faster than the second shaft。 In order to make
2015-01-07 Reading quantity 2846
introduction：Thermoplastic molding There is a wide variety of thermoplastics，Even the same variety is also due to the different ratio of resin molecules and additives The application and process characteristics are also different。In addition，To change the character of the original variety，Common copolymerization、Crosslinking and all kinds of chemistry Methods A certain percentage of other monomers or polymers were introduced into the original resin structure，abrogate The structure of the resin becomes a modified product with new improved physical properties and processability。Such as，ABSThats the polystyrene molecule Acrylonitrile was introduced into the drug、The second and third monomers such as butadiene are then modified copolymers，It can be regarded as modified polystyrene
2015-01-07 Reading quantity 2834
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