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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。]It is to change the sliding friction between the running shaft and the shaft seat into rolling friction，A precise mechanical element that reduces friction losses。Rolling bearings generally consist of inner rings、Outer ring、The rolling body and the cage are composed of four parts，The function of the inner ring is to match and merge with the shaft to rotate together；outside
2015-03-24 Reading quantity 1522
introduction：INAbearing[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 assembly surface and the surface of the part matched therewith，If there is a bruise、Rust layer、Abrasive dust、Sand grain、Dust and mud are present，A bearing is difficult to install，The assembly position is incorrect；Second, these attachments form abrasives、Easy to wear roller bearing working surface，Affect assembly quality。therefore
2015-03-24 Reading quantity 1567
introduction：Abrasive or non-metallic abrasives are used(grindstone、Abrasive belt、Oilstones and abrasives, etc)The machine tool that processes the surface of the workpiece is called the grinder，It is a kind of machine tool that appears in order to adapt to the precision machining of the workpiece，It is a kind of precision machine tool。Usually abrasive rotation is the main movement，The rotation and movement of the workpiece or the movement of the grinding tool is the feed movement。Usually the machine tool that uses the grinding wheel is called the grinder，Such as cylindrical grinding machine、Surface grinding machine，And put it with a whetstone、Abrasive as a cutting tool of the machine called“Finishing machine”。 1．Process characteristics of grinding machine (1) Cutting tools are made of countless tiny pieces、rigidity、Sharp non-gold
2015-03-24 Reading quantity 1443
introduction：xingwei gongcha Form and position tolerance tolerance of form and position Including shape tolerance and position tolerance。Any part is made up of points、line、facial，These points、line、Face element。There is always an error between the actual element of the machined part and the ideal element，Including shape error and position error。Such errors affect the function of mechanical products，The corresponding tolerances should be specified in the design and marked on the drawing according to the specified standard symbols。20century50Before and after，The industrial countries have the standard of visible position tolerance。countries
2015-03-24 Reading quantity 2793
introduction：one、introduction Steering performance is one of the main performance of automobile，The performance of the steering system directly affects the handling stability of the car，It is necessary to ensure the safe running of the vehicle、Reduce traffic accidents and protect drivers safety、Improving the working conditions of drivers plays an important role。How to design the steering system rationally，Make the car have good handling performance，It is always an important research topic for designers。In the vehicle high speed、The driver is not professional、Traffic density today，For more different levels of driving population，The maneuverability design of automobile is particularly important。steering-by-wire
2015-03-24 Reading quantity 2868
introduction： Standard number Standard Chinese name Standard English name GB/T10886-2002 Three screw pump Three screw pumps GB/T10831-1989
2015-03-24 Reading quantity 2899
introduction： Working principle The boiling granulation method is the result of the comprehensive application of spray technology and fluidization technology，Traditional mix—pelleting—Drying is done all at once in the same closed container，Achieve one step granulation，The raw material powder is fluidized in the bed，At the same time, the adhesive droplets are sprayed to the fluidization interface to form granules，The volatile water is carried out with the exhaust air。 peculiarity Granulation by powder，Improve liquidity，
2015-03-24 Reading quantity 2743
introduction：1Casting processCAD In the casting process design process，There are a lot of tedious math calculations and a lot of table lookup choices and so on，Only the personal experience and manual operation of the process designer，Not only does it take a lot of time，And design results often vary from person to person，It is difficult to guarantee the quality of castings，60Since the ages，Especially into80post-decade，With the rapid development of electronic computer technology，Computer aided design (CAD) technology has been applied more and more widely in industry，Also for the scientific casting process design、Precision provides a good tool，It has become an important content of foundry technology development and production development
2015-03-24 Reading quantity 2787
introduction：1、When using the injection molding process to produce products，Due to the non-uniform cooling and non-uniform shrinkage of the plastic in the mold cavity and the product knot The structure design is unreasonable，It is easy to cause various defects of the product： Reprint in a reduced form、Weld mark、Air hole、Amorphosis、napping、Tip wound、flash。 2、To get high quality injection molding products，We must take structural manufacturability into account when designing products，undercombination The main structural characteristics of injection molding products are analyzed to avoid injection molding defects。 2.1Opening direction and parting line Each injection molding product must first determine its opening direction and parting line at the beginning of the design，To guarantee
2015-03-24 Reading quantity 2784
introduction：jixie zengyi Mechanical gain mechanical advantage The ratio of load to driving force in a machine，It represents the degree of mechanical enhancement。The lever is the simplest labor-saving device(See picture[Mechanical gain diagram])，Is the fulcrum，PRepresents the force acting on a point,WIts a load on a point。When the lever is in equilibrium，If friction is not considered, it can be obtained according to the torque balance relationship Mechanical gain=W/P=/evident，The smaller the distance between the point and the fulcrum, the less labor. Using this principle, many lifting equipment can be made,The winch is one of them。And a half
2015-03-24 Reading quantity 2785
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