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introduction： SKFThrust 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 fit with the shaft is generally a transitional fit，The fit between the seat ring and the bearing seat hole is generally a clearance fit,bidirectionalSKFThe center shaft ring of the thrust ball bearing shall be fixed on the shaft，To prevent rotation relative to the axis。SKFInstallation method of thrust ball bearing，In general, it is axial rotation
2015-03-15 Reading quantity 1433
introduction：switchKOYObearing[KOYObearing:kOYOBearings are generally required to bear large loads，Often without a cage，Instead, fill the inner and outer raceways with rolling elements。And most small and medium-sizedKOYORolling bearings are equipped with retainers。 inKOYOBearing in the processing process，The outer ring of the bearing、Inner ring、How do the roller and cage fit together。]There are two common ways to do this：One is to use acetylene oxygen to directly heat the bearing；The other is to use oil immersion heating for small bearings，Reach thermal expansion，Enlarge bearing bore，For assembly。These methods are widely used in long-term equipment maintenance
2015-03-15 Reading quantity 1435
introduction：Since the 1980sSMTSince the birth，Mount equipment Users always want to decide which machine is best for their production environment。prime，It is believed that，As fast as I can、The machine with the fewest scrap mount components is the best。 Since then，SMTProcesses are becoming more demanding。Component sizes have become smaller，Mount position becomes tighter。Miniaturized electronic devices have accelerated consumer demand。Mounting devices must now mount components even faster and more accurately，To remain economically competitive。 now，Mount equipment suppliers choose their own parameters and methods to specify the output and mount of their machines
2015-03-15 Reading quantity 2875
introduction：NSKFlat thrust 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 main axial load is borne in the assembly，Its wide application。Although the thrust bearing installation operation is relatively simple，However, there are still many errors in actual maintenance，That is, the tight and loose rings of the bearing are installed incorrectly，Result inNSKbearing[NSKbearing:Japanese Seiko strain
2015-03-15 Reading quantity 1451
introduction： 61：What are the three forms of threaded connection？ a：Bolted connection，Double stud connection，Screw connection。 62：The CAM mechanism is composed of three basic components？ a：CAM，Driven member and frame。 63：What are the four basic deformations of a workpiece at work？ a：Tension deformation，Shear deformation，Torsional deformation，Bending deformation。 64：What are the common constraints in engineering？ a：Flexible constraint，Smooth surface constraint，Hinge restraint，Fixed end constraint。 65：What are the three elements of force？ a：size，direction，
2015-03-15 Reading quantity 2874
introduction： Metal injection molding technology（MIM）Developed by powder injection molding technology of ceramic parts，It is a new type of powder metallurgy near net forming technology。MIMThe main production steps of the technology are as follows： Metal powder is mixed with binder——pelleting——Injection molding——degrease——sintering——Follow-up treatment——Final product The technology is suitable for mass production with high performance、Small size powder metallurgy parts with complex shapes。In recent decades，MIMTechnology is developing rapidly，The material systems that can be applied include：Fe-Nialloy、Stainless steel、tool
2015-03-15 Reading quantity 2796
introduction：1、Assembly of belt drive mechanism Belt drive is to wrap the winding belt tightly on two belt wheels，Using the friction between the conveyor belt and the pulley to transfer power，There are two commonly used triangle belt drive and flat belt drive，Mainly talk about triangle belt drive。 Technical requirements for triangular belt drive： （1）、Install the pulley correctly，The radial runout is usually required to be（0.0025-0.0005）×Dmillimeter。The end runout is（0.0005-0.0001）×Dmillimeter，DThe diameter of the pulley is such as the pulley400Millimeter diameter：Maximum allowable radial runout1millimeter，Face maximum runout0.2
2015-03-15 Reading quantity 1567
introduction： Solar water heater“Physical examination” It is not advisable to touch metal pipes except during thunderstorms，It is not advisable to turn on the TV and play outside the mobile phone，Also pay attention to the solar water heater“secure”。 Lightning protection expert survey found：Most rooftop solar water heaters are installed higher than the highest lightning strip of the building（The needle），And built-in electric heating power cable and sensing signal cable，The water supply pipe goes straight to the room，Once lightning strikes，A powerful lightning current will pass through the pipe、Power cord、The signal line goes directly into the room，The consequences can be imagined。For this purpose，Before installation, the local lightning protection and disaster mitigation agency should be asked to do a lightning protection for the solar water heater on the roof
2015-03-15 Reading quantity 2796
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。]After installation，To check that the installation is correct，An operational check is required。Small machines can be turned by hand，To make sure the rotation is smooth。Check items for foreign bodies、scar、Poor operation due to indentation，Due to poor installation，The torque caused by poor machining of the mounting seat is unstable，Because the clearance is too small、Installation error、Seal friction caused by excessive torque and so on。Power operation can begin if there is no anomaly。 Big machines dont work well
2015-03-15 Reading quantity 1534
introduction： With the development of power electronics technology with semiconductor power devices as the core and the control technology represented by computer, the development is rapid，Power electronic technology、Frequency converter technology、andPLCIts application has penetrated into all aspects of industrial production and social life。The mine water treatment automatic control system is mainly used in coal mine、Mine water treatment。The treated water can reach the drinking water standard，It not only solves the serious pollution caused by the direct discharge of mine water to the environment，It also solves the problem of water scarcity faced by many mines。Since most mine water is treated as domestic drinking water，In order to ensure the quality of the effluent and the whole
2015-03-15 Reading quantity 2780
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