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introduction：At present，A number of high tower equipment are widely used in the chemical industry，Some equipment also needs to be operated frequently，For ease of operation、secure，Spiral ladders are often welded to the outer walls of these devices。To design a spiral ladder by hand，Not only is the calculation cumbersome，Its even more difficult to draw。CAXAThe advent of electronic drawing boards，So that these intractable problems can be easily solved。figure1It is the level of the spiral ladder drawn、elevation。The following is a list of the painting of the spiral ladder of high tower equipment，To illustrateCAXAThe superiority of electronic drawing board。 Consider human physical strength，High tower equipment is generally equipped with several spiral stairs，There is a rest level between the stairs
2014-12-26 Reading quantity 2891
introduction：The criteria for judging vary according to mechanical properties and importance, as well as inspection cycles。If any of the following injuries，One-way 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。]Not to be reused，Must be replaced。Bearing in service[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is in the process of mechanical transmission
2014-12-26 Reading quantity 1613
introduction：1、Tile surface corrosion：Spectral analysis found that the concentration of non-ferrous elements was abnormal；Many submicron wear particles with non-ferrous components appear in ferrography；Excessive lubricating oil moisture、Acid value exceeding standard。 2、Journal surface strain：There are ferrous cutting wear particles or black oxide particles in the ferrography,Tempering color exists on the metal surface。 3、Journal surface corrosion：The spectral analysis found that the iron concentration was abnormal,There are many submicron particles of iron composition in the ferrogram,Lubricating oil moisture exceeds the standard or acid value exceeds the standard。 4、Surface strain：Cutting abrasive particles were found in ferrography,The abrasive particles are composed of non-ferrous metals。 5、Fretting wear of tile back：Spectral analysis
2014-12-26 Reading quantity 1638
introduction： The easiest way to apply a preload is to use a spring or group of springs)。A spring acts on something that can move axiallyIKOThe outer ring of the bearing。Even inIKOAxial displacement of bearings due to thermal expansion，The preload force is also basically constant。 The load applied by the spring is for high speed grinding of the angular contact ball bearings of the king shaft[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，Be used for
2014-12-26 Reading quantity 1668
introduction： For casting engineers and mechanical structure design engineers，Heat treatment is a very meaningful one，A highly valuable method for improving material quality，The microstructure and properties of cast iron can be changed or affected by heat treatment，At the same time, higher strength can be obtained、hardness，And improve its abrasion resistance and so on。 There are many kinds of heat treatment for different purposes，The basic can be divided into two main categories，The first category is those where the structure of the tissue does not change or should not be changed by heat treatment，The second is a change in the basic organizational structure。First heat treatment program，Mainly used for elimination
2014-12-26 Reading quantity 2995
introduction： Main shaft 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。]Oil is the spindle bearing of precision machine tools and similar equipment[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
2014-12-26 Reading quantity 1934
introduction：Through combination 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。]Failure and deterioration，Performance state parameters to judge and predictIKOBearing reliability and performance，On the part of the anomaly，Cause and risk level to identify and judge，Comprehensive techniques that determine repair and improvement methods。therefore，bearing[bearing:bearing（“Be
2014-12-26 Reading quantity 1653
introduction：Pin ring small tooth difference planetary reducer has the following advantages： （1）Low cost。Using the extraction technology，The structure of pin ring planetary reducer is simplified，Identical power，Pin rings with different transmission ratios have the same structure，Products can be mass produced，At the same time, the processing technology of key parts is good，No special equipment or skill is required，Application of general purpose locomotive can be processed and manufactured，Low manufacturing cost。 （2）Smooth transmission，Low noise。The mass of the pin ring is small，Boom bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is fixed and reduced in the mechanical transmission process
2014-12-26 Reading quantity 2958
introduction： Induction heating：The workpiece is placed in the sensor，The sensor is usually input medium frequency or high frequency alternating current (300-300000HzOr higher)Hollow copper pipe。An alternating magnetic field is generated to generate an induced current of the same frequency in the workpiece，The distribution of this induced current in the workpiece is not uniform，Surface strength，And its weak on the inside，Close to the heart0，Take advantage of the skin effect，The surface of the workpiece can be heated rapidly，In a matter of seconds the surface temperature rises to800-1000℃，The increase in heart temperature is very small。 Selection of induction heating frequency：Per heat
2014-12-26 Reading quantity 1647
introduction： preface Laser technology is the century60nativity，And a high technology that is developing extremely fast。Its development and penetration，Led to the development of other disciplines and technologies，Laser technology has become one of the main pillars of the high-tech industry in this century。 Laser processing technology is the main application of laser technology in industry，Laser processing technology has accelerated the transformation of the traditional processing industry，It provides a new means of modern industrial processing technology，Great influence。Laser processing refers to the cutting of industrial parts with high power laser beams、Heat treatment、weld、Punch and so on，With tradition
2014-12-26 Reading quantity 2883
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