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introduction： Four row tapered roller bearings[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。]It has been widely used in steel mill equipment。But because the mill equipment is in operation，There is inevitably cooling water、Iron oxide chips enter the bearing，The service life of the bearing is greatly shortened。To solve this problem，NSKcorporation（Seiko Co., LTD）
2015-01-09 Reading quantity 1462
introduction：First step：Carry on the feasibility analysis to the product of the designed mold，Take a computer case, for example，Firstly, the product drawings of each component are analyzed by using design software，Thats what we call a set of maps in our work，Ensure the correctness of each product drawing before mold design，On the other hand, you can familiarize yourself with the importance of each component in the chassis，To determine the key dimensions，This is very good in mold design，The specific set of diagram methods will not be introduced in detail here。 The second step：The work to be done after the product analysis，What kind of mold structure is used for product analysis，And the product scheduling process，Definite parts
2015-01-09 Reading quantity 2798
introduction：The reducer is a power transmission mechanism，Speed converters using gears，Slow down the rotation of the motor to the desired number of revolutions，And get a larger torque mechanism。 In short，The power of the general machine is designed and manufactured，Its power rating does not change，At this moment，The greater the speed，Then torque（Or torque）smaller；The lower the speed，The greater the torque。Sometimes we try to get a lot of torque，You need to use the decelerator handle“Prime mover”The speed of the engine slows down，So you get a lot of torque，Its the same reason cars slow down when theyre going up a hill。 There are many kinds of retarders，According to the transmission type can be divided
2015-01-09 Reading quantity 2799
introduction：1.sealingring--Sealing ring 2.sealface--Seal face 3.sealinterface--Sealed interface 4.rotatingring--Rotating ring/Rotating ring 5.stationaryring--Dead ring/Stationary ring 6.compensatedring--Compensation ring 7.un-compensatedring--Uncompensated ring 8.sealhead--Compensation ring assembly 9.primaryseal--Main seal
2015-01-09 Reading quantity 1556
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。]Part working surface and core in condition、Structural and performance requirements are quite different,The overall heat treatment often makes the two cannot be taken into account,The potential of materials is also underutilized。Applied material surface strengthening technology can not only better solve the surface and the core in terms of structure and requirements
2015-01-09 Reading quantity 1698
introduction：Regular maintenance of equipment，It is removed during operation inspection and replacement of peripheral partsNSKImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]Conduct an inspection，To judge whether it can be used again or whether the use is better than bad。Carefully investigate and record the removed bearings and their appearance，To determine and investigate the remaining amount of lubricant，After sampling，Clean the bearings well。 Then check the raceway surface，Rolling surface and matching
2015-01-09 Reading quantity 1463
introduction：one、RPprinciple 1.RP(Rapid Prototyping) RPM(Rapid Prototyping Manufacturing) RP&M(Rapid Prototyping & Manufacturing) Rapid prototyping 2.RP/M(Rapid Prototyping/Part Manufacturing) Rapid prototyping/Parts manufacturing 3.LRF(Laser Rapid
2015-01-09 Reading quantity 2890
introduction：NSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]Whether the installation is correct，It directly affects the accuracy of the bearing when it is used、Life and performance。 (1)Wash a lotNSKbearing[N
2015-01-09 Reading quantity 1455
introduction： Flow in tube: The longitudinal flow of fluid as it fills a pipe﹐Pipe flow for short。Tube flow is one of the main research contents of viscous incompressible fluid dynamics。Pipe flow problems usually required to be solved in engineering﹐How much power is used to make the required fluid flow continuously through the given diameter of the pipe﹔In other words, it is required to calculate the total head loss of pipeline flowΔ﹐Calculate volume flow and economical pipe hydraulic diameter。 Steady tube flow for viscous incompressible fluids﹐The following energy equation is commonly used for analysis Formula middle and lower corner mark1﹑2Represents the progress of the accounting pipe section﹑exit﹐The items in parentheses represent the rest in turn
2015-01-09 Reading quantity 2806
introduction： Have two（Or one）A positive cylindrical or rectangular gauge for optical measurement of the plane。The optical measurement plane is a glass plane with very small surface roughness and flatness errors，It can produce light interference fringes（See laser length measurement technique）。There are two kinds of flat crystal and parallel flat crystal。Flat crystals are used to measure the flatness error of highly polished surfaces，figure1a[Flat crystal test]The flatness error of the measuring surface is measured by the flat crystal test measure block。The two optical measurement planes of a parallel flat crystal are parallel to each other，Used to measure the parallelism error of two high finish surfaces，For example, the parallelism error between the two measuring surfaces of the micrometer（figure1b
2015-01-09 Reading quantity 2808
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