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introduction： one．Siemens3System maintenance 1)No basic screen is displayed after the power is connected (a)Circuit board03840No monitoring light is displayed on the board (b)03840The monitoring light on the circuit board is on ①Monitoring light blinking。If the monitoring indicator blinking frequency is1Hz，theEPROMOut of order；If the blinking frequency is2Hz，thePLCOut of order；if4HzFrequency flicker，Then keep the battery alarm，Indicates that the voltage is insufficient。 ②The monitoring indicator is off on the left and on on the right。Indicates the interface board of the operation panel03731The board is faulty orCRTOut of order。 ③Monitoring light on。This fault
2014-12-10 Reading quantity 3203
introduction： Whether its a linear stepper motor or some other type of stepper motor，Couplings are essential accessories for them，Also the main accessories，Its main role in the stepper motor is to drive，Act as a hub，Specifically, it is used to connect the stepper motor shaft and the driven shaft，To transmit torque，This requires that the coupling must have precise rotation performance，If the rotation performance is relatively slow, it will greatly reduce the efficiency of the stepper motor。At the same time, its rotativeness requires it to have the following four advantages：
2014-12-10 Reading quantity 3281
introduction：There are two technology methods for induction heating surface quenching of camshaft of gasoline engine，One is cam-by-cam heating and cooling，The other is the simultaneous heating and cooling of all cams。At present, domestic manufacturers all use the former one，On the one hand，Due to the limitations of equipment conditions，On the other hand, this process method is more suitable for multi-variety and small-batch production。Our factory uses the horizontal quenching machine tool with the newly developed domestic high-power thyristor medium frequency power supply，rightEQ491Engine cast-iron camshaft8One CAM induction hardening，Meet the technical quality requirements of product drawings。 1 Technical requirements for surface hardening of camshafts
2014-12-10 Reading quantity 3214
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。]Bearing in rolling[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，Used to reduce power transmission during the process
2014-12-10 Reading quantity 1881
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。]Corrosion is mainly divided into metal corrosion and human hand sweat，Metal corrosion accounts for the vast majority，In many cases, its unavoidable。And sweaty hands can also cause itINAbearing[bearing:bearing（“Bearing”，Japanese person“shaft
2014-12-10 Reading quantity 1920
introduction：lately，With high speed rotation and miniaturization requirements are increasing，So the 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。]Performance puts forward higher requirements。In particular, the automotive industry has a high demand for reducing vehicle size and fuel consumption。On the other hand，The electronics industry also requires very small bearings[bearing:bearing（“B
2014-12-10 Reading quantity 1819
introduction： KOYOThe friction of bearing mainly consists of rolling friction and sliding friction between rolling element and ring raceway；Sliding friction between the cage and the rolling element and the guide surface of the ring（When there is no cage, it is the sliding friction between rolling elements）；Sliding friction between the end face of the roller and the side face of the ring；Viscous resistance of lubricant；The sliding friction of the sealing device is composed，Its size depends onKOYOType of bearing、dimension、load、Rotational speed、oiling、Seal and other factors。
2014-12-10 Reading quantity 1825
introduction：Not all damageIbearing[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。]Can be repaired，But for every damage to the 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 are produced on the shaft
2014-12-10 Reading quantity 1817
introduction：FAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]Its a precision part.，Its use must also be carried out with corresponding care。No matter how high performance bearings are used，If used improperly，You dont get the high performance you expect。Relate toFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]Precautions for use are as follows。 one、holdFAGbearing[FAGbearing:Spindle shaft
2014-12-10 Reading quantity 1733
introduction： A pump in which the liquid is transported along the axis by the force exerted on the liquid by the blade of the rotor impeller。figure Axial flow pump diagram The structure of axial flow pump。Impeller mounting2～7Individual blade﹐Rotate in the cylindrical tube pump housing。A fixed guide vane is arranged on the pump housing at the upper part of the impeller﹐To eliminate the rotational motion of the liquid﹐Make it move axially﹐And convert the kinetic energy of rotational motion into pressure energy。Axial flow pumps are usually single-stage﹐A few are made two-stage。Large flow range﹐for180～360000meter3/when﹔The head is generally in20Mi Yi
2014-12-10 Reading quantity 3057
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