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introduction：Nitric acid solution alone is effective in removing free iron and other metallic dirt，But the removal of the oxide sheet，Thick corrosion products，Tempering film is not effective，Generally should be usedHNO3+HFliquor，For convenience and safe operation，Fluoride can be used insteadHF。aloneHNO3No corrosion inhibitor is added to the solution，butHNO3+HFWhen pickling，Need to addLan-826。UseHNO3+HFpickling，To prevent corrosion，Concentration should be maintained5：1The proportion of。The temperature should be lower than49℃，If too high，HFvolatile。 On the passivation fluid，HNO3Should be controlled in20％—50％among，electrochemically
2015-01-28 Reading quantity 1547
introduction：World 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 development has experienced３stage，There have been many difficulties and dangers，Finally achieved the glory of the bearing industry。 The world bearing industry rose from the late nineteenth century to the early twentieth century。1880Bearing production began in the United Kingdom,1883Germany established the worlds first
2015-01-27 Reading quantity 1462
introduction：introduction：Steering analysis is an important part of design analysis in the process of developing new replacement axle。Now use the powerfulUGAs a design and analysis tool, software improves work efficiency and quality，Simultaneous passageUGThe dynamic simulation analysis of the motion module is more convenient to verify and check the design results、review。The accuracy of the design is greatly improved，The design results are very consistent with the actual product state。This paper mainly discussesUGThe application of motion analysis module in steering analysis is introduced in detail。 Establishment of motion analysis model： Design parameters according to steering system、Product drawings are made of the parts involved in the steering analysis
2015-01-27 Reading quantity 2889
introduction：It can be found in the processing of threaded holes of different materials，For dense material、Materials with higher strength（steeliness）On the threaded hole，Due to its roughness、High rigidity and strength，The bolts used can be turned in and out multiple times，The screw hole is not easily damaged；And for the threaded holes on the aluminum alloy parts，Its roughness and strength are low，After repeated screw in and out of the bolt，Screw holes are easily damaged，Thus affecting the use of the workpiece。The screw hole on the aluminum alloy workpiece can be better prevented from being damaged by using the extruded tap。 Due to aluminum alloy die casting surface1mmThe following are prone to porosity，So we use drilling、Tapping and other conventional addition
2015-01-27 Reading quantity 2897
introduction：Different shapes of knives have different uses。Lets take a look at the corresponding uses of various shapes。 Almost all milling cutters can be used for traditional low-speed milling，But when used to make high-speed cuts involving fast cuts and more strokes or“High performance”In application，The performance difference between various tools becomes important。Special shaped tools have special uses。 This article will introduce some tips on how to effectively use different shapes of tools。The four basic tools discussed here are widely used in 3D milling and copying milling，But there are many special applications within these wide range of uses
2015-01-27 Reading quantity 2795
introduction：OType sealing ring for shortOMolded ring，Begin to appear in19mid-century，It was used as a sealing element for steam engine cylinders。 OThe rubber sealing ring has the following advantages： 1） The sealing part has simple structure，Compact installation site，Lighter weight； 2） It has a self-sealing effect，Often used only A single seal completes the seal； 3） Good sealing performance，It can be used as a static seal with almost no leakage； 4） The motion friction resistance is very small，It can also adapt to stressful situations； 5）Dimensions and grooves have been standardized，Low cost，Easy to use and purchase。
2015-01-27 Reading quantity 1445
introduction：Rolling 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。]With its low friction resistance、Starting sensitivity、High efficiency、High rotation accuracy、Simple lubrication、It has many advantages such as convenient replacement and is widely used in production and life。But because of its high manufacturing precision requirements、Complicated process，At present, the standard rolling bearings are produced by special aircraft，And by professional
2015-01-27 Reading quantity 1465
introduction：In machine building，In addition to the use of a cylinder and an inner circle as a matching surface，Cone and inner cone are also commonly used as mating surfaces。Such as，The fit of the main shaft hole and the center of the lathe；Cone hole and center of tailstock sleeve、The fit of drill taper shank, etc。The cone has a tight fit with the inner cone，Easy disassembly，Multiple disassembly can still maintain accurate centering effect and other advantages。 There are four ways to conical the surface：Rotating small drag plate method、Offset tailstock method、By the ruler method and the broad knife method。 one、Rotating small drag plate method（Small knife rest inversion method） method：According to the coning Angle of the part（2
2015-01-27 Reading quantity 2814
introduction： A machine that converts the energy contained in the working fluid into mechanical work﹐Also known as a turbine or turbine。Turbine is in EnglishturbineTransliteration of﹐From LatinturboOne word﹐It means to rotate an object。The working conditions of the turbine are different from the working medium used﹐So there are many different types of structures﹐But the basic principles are similar。The most important component of a turbine is a rotating element﹐trochanter﹐impeller﹐It is mounted on the turbine shaft﹐Having blades uniformly arranged along a circumference。The energy of the fluid is in the flow﹐Converted to kinetic energy as it passes through the nozzle﹐Through the impeller
2015-01-27 Reading quantity 2818
introduction：1、Comply with casting equipment general operating procedures。 2、pre-work，Start with a running test，Then run empty2-3minutes，Check the drive system（motor、coupling、retarder）And the movement of the roller body is smooth，Just make sure everythings okay，Before production can proceed。 3、Too many or too few castings can be loaded into the drum，Reach drum volume80%Be appropriate，The weight of a single piece cannot exceed30kilogram。 4、The amount of iron star loaded into the roller should be80~100Within the kilogram。 5、pre-operation，Close the lid，Tighten the screw。 6、While driving，Fan opening，Rear opening drum，Parking time，
2015-01-27 Reading quantity 2803
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