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introduction： 1 introduction Programmable controller is based on microprocessor technology，Integrated computer technology、Automation technology and communication technology of a new type of industrial control device。Its reliability is extremely high、Strong ability to withstand harsh environment、It is very convenient to use，And robotics、cad/camIt is called the three pillars of industrial production automation。It was last century60Developed in the era is known abroad as“...
2016-02-15 Reading quantity 1659
introduction： 1.skfBearing accuracy improvement method skfAfter the bearing is installed in the main machine，As measuredskfRadial runout of the bearing spindle，It can be found that the measured value of each turn has a certain change；When measuring continuously，It can be found that after a certain number of revolutions，This change is approximately repeated。The index to measure the degree of this change is the rotation accuracy of the cycle，The variation is approximately repeated by the number of revolutions required to represent the accuracy of the cycle rotation“quasi-periodic”，The amplitude of the magnitude change in the quasi-period is large，That is...
2016-02-15 Reading quantity 1850
introduction： The power of the servo motor，It should be selected according to the power required by the production machinery，Try to make the motor run under the rated load。The following two points should be noted when choosing： 1、If the motor power is selected too small．Will appear“Little horse and big cart”phenomenon，Cause motor overload for a long time．The insulation is damaged by heat．Even the motor was burned。 2、If motor power...
2016-01-31 Reading quantity 1912
introduction：What does the article say about time relays What is the application of time relay Time relay(time relay) Refers to when the input signal is added or removed，The output part needs to be delayed or limited to the specified time before closing or disconnecting the relay of the controlled circuit。 it Fall into： 1）Electromagnetic time delay relay； 2）Electrodynamic time relay； 3）Thermal time delay relay； 4）Hybrid time delay relay； 5）Solid state time relay...
2016-02-15 Reading quantity 1692
introduction：Common terms and definitions for bearing gaskets for rolling bearings：
1、Shaft ring English： shaftwasher
definition：Bearing washer mounted on shaft。
2、race English： housingwasher
2016-01-29
Reading quantity 1897
introduction：Bearing type selection,Bearing load When making bearing type selection，Bearing load should be taken into account，Include the following factors： Size of load Load size is usually one of the factors that determines the selection of bearing size 。Generally speaking，Roller bearings can withstand greater loads than ball bearings of the same size，While having a full roller roll...
2016-01-30 Reading quantity 1743
introduction：Bearings are used several times in daily life，Here for you to popularize some basic knowledge of bearings。 Life classification of bearings：Fatigue life；Wear life；Failure life；Service life。 Bearing life： one、Bearing fatigue life：The material of the main moving parts of the bearing reaches its limit，Cause bearing failure before...
2016-01-30 Reading quantity 1908
introduction： Early rolling millnskThe bearing configuration on the mill was different from the present，Two sets of aligning rollers were used at that timenskBearings are mounted side-by-side on the same roll neck。This configuration type basically meets the production conditions at that time，The rolling speed can reach600rpm。But as the speed increases，Its disadvantages are becoming more and more prominent：nskShort bearing life、Large consumption、Low finished precision、Roll neck wear is serious、Roll shaft movement large, etc。 、Four row cylindrical roller bearings+thrustnskbearing Cylindrical roller bearing inner diameter and roller...
2016-01-30 Reading quantity 1779
introduction： 1.Coupling with sliding friction should pay attention to maintain good lubrication conditions 2.High-speed rotating coupling can not have protruding objects 3.Use couplings with raised shoulders and grooved pairs，Axle disassembly should be considered 4.The two ends of the shaft are required to rotate synchronously，Do not use flexible couplings with elastic elements 5.Intermediate shaft without bearing support，Do not use cross slide coupling at both ends 6.A single universal coupling cannot realize synchronous rotation between two axes 7.Do not use the jacket of the gear coupling...
2016-01-30 Reading quantity 1793
introduction：[Bearing mounting]Precautions before bearing installation and bearing use precautions： Bearing installation precautions before installation 1)Bearing preparation Because the bearings are treated with rust and packed，Therefore, do not open the package until the installation is ready。In addition，The anti-rust oil coated on the bearing has good lubrication performance，For general purpose...
2016-01-30 Reading quantity 1800
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