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introduction：The tools used in the machining center are made of universal tools（Also known as working head or cutter head）It is composed of a tool handle matching the taper hole at the front end of the spindle of the machining center。In application，According to the requirements of machining center machine tools、Fixture requirements、The properties of the workpiece material、Processing procedure、Cutting parameters and other relevant factors correctly select the tool。The general principle of tool selection is：Tool installation and adjustment is convenient，Good rigidity，High durability and precision。Under the premise of ensuring safety and meeting processing requirements，Tool length should be as short as possible，To improve the rigidity of the tool。 On the machining center machine tool，All kinds of knives are stored separately in the knife store，According to the procedure
2015-03-17 Reading quantity 2872
introduction： At present, the main difficulties of seasoning industry coding technology are： 1、Identification on various surfaces of different materials。The packaging materials and labeling contents of condiments are varied，To mark different content on different material surfaces，If you choose inkjet code，A range of sprinkler models for different requirements is required，Includes a small character nozzle for extremely high sign quality；If using laser coding technology，You need to choose can rely on contrast、articulation、Height and other adjustment，A laser for accurate marking。 2、Print quality，Can you get clarity?、High quality mark
2015-03-17 Reading quantity 2786
introduction： Rolling 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。]According to the type of rolling element can be divided into two categories：（1）Ball bearing（Ball bearing），Its rolling body is the ball；（2）Roller bearing（Roller bearing），Its rolling body is a cylinder。 Rolling bearings can be divided into the following types according to the direction of load they can withstand： entad
2015-03-17 Reading quantity 1441
introduction：Abstract：towardsSolidWorks2004As for，No doubt she is.SolidWorksThe best version so far，SolidWorks2004 Office ProfessionalNew than the previous version250Multiple function，Where core modeling techniques exceed200multiterm。Due to its new features too numerous to list，This article gives readers a brief introduction to some of the typical enhancements。 one、summarize
2015-03-17 Reading quantity 2784
introduction：Boundary layer theory: When a fluid moves at a large Reynolds number﹐The viscosity and thermal conductivity of the fluid can be regarded as acting centrally in the thin layer on the surface of the fluid, that is, the boundary layer。According to this characteristic of the boundary layer﹐Simplified navid－Stokes equation﹐And solve it﹐The law of resistance and heat transfer can be obtained。The theory was developed by a German physicistL.Prandtl1904proposed﹐It created conditions for the development of viscous incompressible fluid dynamics。 Boundary layer When a fluid flows around a large Reynolds number﹐At a distance from the solid wall﹐The viscous force is much smaller than the inertial force﹐negligible﹔But thin near the solid wall
2015-03-17 Reading quantity 2898
introduction：fushejiao xishu Radiation Angle coefficient radiation shape factor The coefficient reflecting the relationship between geometric shape and position of different objects radiating each other is equal to any two areasAandAThe surface of(See picture[Radiation Angle coefficient diagram]),The temperature is respectivelyTandT。When the space medium is transparent to radiation energy，Per surfaceASome of the radiated energy can reach another surfaceA,The rest of the energy falls to the surfaceAOutside the space by the surfaceAThe emitted radiation falls to the surfaceAThe above percentage is called the surfaceAFor the surfaceAThe spoke of
2015-03-17 Reading quantity 2817
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。]Due to frequent use，Oil pollution will reduce the service life of the bearing，So how do we clear itNSKbearing[NSKbearing:Seiko
2015-03-17 Reading quantity 1440
introduction：1.rollFAGbearing[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。]includeFAGbearing[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。]racewayFAGbearing[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。]Inner ring andFAGBearing outer ring，Rolling elementFA
2015-03-17 Reading quantity 1440
introduction： Department of Mechanics, School of Civil Engineering, Hohai University Our country has a vast territory，There are many rivers, seas and lakes，Abundant water resources，It is also the cause of flooding。 How to make full use of water resources、Flood mitigation、The benefit of mankind is the primary task of water workers。In recent years, with the care and support of the Party Central Committee and local governments， Water conservancy projects are being built all over the country，Ru shui power station、Flood dam，The construction of the Three Gorges Project is one of the most typical examples。The completion of a dam，It cant be done in a month or two， Its a massive project that takes months, maybe a year or two，So economic efficiency and safety and reliability are two tens
2015-03-17 Reading quantity 2783
introduction：Porosity is one of the important characteristics of powder metallurgy materials。Take advantage of this trait，may： (1)Make sweat material。In other words, the pores of common powder metallurgy materials contain substances with low melting point，Working at high temperatures，The leaching material melts and seeps out，Make material“perspire”Heat dissipation。In this way, expensive heat-resistant alloys can be replaced with ordinary materials，Further increase the use temperature of heat-resistant parts。 (2)Manufacture filter material。Air filtration、Filtrate and filter poison, etc。 (3)Contains immersion reducer，Manufacture of oil-bearing and oil-free lubricated bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）Is in the mechanical transmission process
2015-03-17 Reading quantity 1445
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