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introduction：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。]Five principles of normal work： 1、Minimum oil film thickness criteria 2、Criteria for ensuring minimum installed interference of bearing inner rings 3、Maximum mechanical load and impact load criteria 4、Maximum heat load(Absolute humidity、temperature)criterion
2015-02-07 Reading quantity 1560
introduction：1、Technological principle （1）Phase transition characteristics of metals in vacuum state。 Only difference in atmospheric pressure0.1MPaRange under vacuum，Solid-state transformation thermodynamics、What does the dynamics not change。In the formulation of vacuum heat treatment process regulations，It can be completely based on the principle of solid phase transformation under atmospheric pressure。It can refer to the data of various types of tissue transformation under normal pressure。 （2）Vacuum degassing，Improve the physical and mechanical properties of metal materials。 （3）Vacuum degreasing。 （4）Evaporation of metals：Heating under vacuum，The surface elements of the workpiece will evaporate。
2015-02-07 Reading quantity 1540
introduction：Frictional transmission of power and motion，Inclusive belt drive、Rope drive and friction wheel drive。Friction transmission is easy to achieve stepless speed change,Most of them can adapt to the transmission occasions with large shaft spacing,Overload slippage can also play a role in cushioning and protecting the transmission，However, this kind of transmission can not be used for high-power occasions，Nor does it guarantee an accurate transmission ratio。②A meshing drive that transmits power or motion by engaging the driver with the follower or by engaging the middleware，Including gear drive、Chain drive、Screw drive and harmonic drive。The meshing drive can be used in high-power situations，The transmission ratio is accurate，However, high manufacturing accuracy and installation precision are generally required
2015-02-07 Reading quantity 2796
introduction： Worm gears are generally made of tin bronze，Paired worm materials are commonly used45Steel hardened toHRC45one55,Still in common use40C:hardeningHRC50one55，Grinding to finish by worm grinderRaO.8fcm,When the reducer is running normally，The worm is like a hardened“file”，File away the worm wheel，Cause the worm gear to wear。Generally speaking，This wear is slow.，Like a factory some reducer can be used10Years or more。If the wear rate is faster，It is necessary to consider whether the selection of the reducer is correct，Whether there is overload operation，Material of worm gear，Assembly quality or use environment, etc
2015-02-07 Reading quantity 2882
introduction：Advantages and disadvantages of electric forklift advantage；Three-phase AC motor is the main component of AC drive system，Its working principle is to transfer three-phase alternating current to the stator winding，Gyromagnetic field generation，Induction of the closed rotor winding，To generate an electric current，The rotor rotates in the direction of rotation of the rotating magnetic field under the action of the electromagnetic force。This approach has two obvious advantages: first，The most prominent advantage of AC motors is the absence of carbon brushes，There is also no limit to the maximum current that DC motors usually have，This means that the motor can get more energy and greater braking in practical use
2015-02-07 Reading quantity 2963
introduction：The most important application area of rapid prototyping technology is the development of new products。In the process of new product development，There is no limit to the value of physical prototypes，It mainly includes the following aspects： Contour design： Many products, especially home appliances and automobiles, have high requirements for beauty and novelty。The traditional way to check the shape is to display the product graphics on the computer terminal，But it happens often.“It looks good on the drawing but not on the drawing”The phenomenon of。adoptRPTechnology can be quickly prototyped，For designers and users to review，It makes the shape design and inspection more intuitive, effective and fast。 Check design quality： etmo
2015-02-07 Reading quantity 2800
introduction：If both exist2More than one failure，The relationship between them and their relative values should be explained，Only in order to take effective anti-vibration countermeasures。Vibration characteristics and history should be obtained comprehensively，Identification of vibration mechanism，To eliminate irrelevant faults，Get a positive diagnosis。At present，Various vibration analysis software systems are becoming more and more functional，Using vibration frequency to analyze fault characteristics has become one of the main means of vibration fault analysis，However, the simple fault diagnosis method using spectrum analysis also has an irreplaceable role and effect in the field fault judgment。 An effective fault diagnosis requires the vibration test system and the test system itself
2015-02-07 Reading quantity 2790
introduction：The oil leakage of the reducer of the free burning brick machine must not be careless！ 1、During the operation of the reducer，Each pair of gears engages to give off heat，The frictional heat of motion is affected by the ambient temperature，Increase the temperature of the reducer，The pressure inside the machine gradually increases，The higher the temperature inside the machine，The lubricating oil in the box passes through the flying oil，Sprinkle on the inside of the gearbox，Lubricating oil under the action of pressure difference，Leaking through the cracks。 2、The unreasonable design of reducer structure causes oil leakage，Such as the design of the reducer without ventilation hood，The reducer cannot achieve pressure equalization，Causing the pressure inside the box to increase，Thats when the oil spills。 3、Fail to recognize
2015-02-07 Reading quantity 2785
introduction：*. The same file can be made by2More than oneUserOpen simultaneously，The last person to file is the final result，Therefore, it is necessary to pay great attention or unpredictable results will occur solution︰PDM1 module or Set permissions *. If A and B computers have the same name and file name in the same disk ex:Its in both computers d:1231.CATProduct, 2.CATPart, 3.CATPart, 4.CATPart(This is an interlocking component) ,If you open from a computer
2015-02-07 Reading quantity 2906
introduction： Check approachTIMKENbearing[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。]Place oil seals in condition to ensure they are sufficient to prevent hot liquids、Corrosive liquids and gases permeate the bearing along the axis，If the oil seal is damaged, replace it as soon as possible。Check the automatic lubrication system to ensure oil or lubrication
2015-02-06 Reading quantity 1537
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