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introduction： Used in pipes to join pipes﹑Valves and fittings for equipment inlet and outlet connections﹐Short fitting。The use of pipe fittings can meet the various requirements of pipe layout and assembly﹐For example, connecting pipes﹑swerve﹑Branch and change pipe diameter, etc。Pipe fittings are mainly divided into threaded pipe fittings according to the connection form﹑Flanged fitting﹑Tube fittings and welded fittings4class。 Threaded fitting Includes elbow with thread﹑Tee and bushing and other pipe fittings(figure1 Threaded fitting )。This kind of pipe fitting is used for connecting small diameter pipes﹐Easy to install and disassemble。Threaded fittings for low pressure﹐Mostly made of malleable cast iron﹐Used for high﹑Medium pressure thread
2015-01-11 Reading quantity 2786
introduction：jHaving one or more cutter teeth、A rotary tool used to remove a thin layer of metal from the surface of a machined hole。The hole can be hinged to obtain precise size and shape。The reamer is divided into two kinds according to the method of use and the machine；According to the shape of the reaming cylindrical、Conical and stepped3Kind of;According to the clamping method, there are two kinds: handle type and set type;According to the shape of the tooth groove, there are two kinds of straight groove and spiral groove[Several commonly used reamer]For several commonly used reamer。Cylindrical hole reamer consists of working part、The neck and the stalk are composed。The working part is divided into cutting parts、Calibration section and inverted cone section,The hand reamer does not have an inverted cone part。Principal deflection AngleκThe size of the hinge mainly affects
2015-01-11 Reading quantity 2820
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。]Causes of temperature rise： 1、Breakthrough of supercharger bearing cooling water。 2、Oil degradation，oil，Or run their own dirty oil degradation，Like oil in water，Will produce oil，To increase the acidity increase，Will reduce oil lubrication，Imported bearing[Imported bearing:Simply say imported bearing agent
2015-01-11 Reading quantity 1580
introduction： An axially moving wire is used as a tool electrode﹐Electrical discharge machining (EDM) in which the workpiece is moved in a trajectory to the desired shape and size﹐English abbreviationEDWC。 Brief history 1960years﹐The Soviet Union was the first to develop linear cutting machine tools。Chinese Yu1961A similar machine tool was developed。Early wire-cut machine tools used electrical copying to control the cutting trajectory。At that time due to the low cutting speed﹐It is difficult to make a model﹐Only used in the electronics industry to process other processing methods are difficult to solve the narrow gap。1966years
2015-01-11 Reading quantity 2791
introduction： This paper mainly introduces milling in recent years、The development trend of drilling and turning technology and the advanced tools newly developed by some world famous tool manufacturers reflect the current level of metal cutting technology in the world。 Milling technology and tool There are three main trends in milling technology：（1）High speed milling；（2）Milling of hard and difficult materials；（3）High speed milling of hard and difficult materials。To adapt to three trends，Famous tool manufacturing companies in various countries have recently developed the following advanced tools： Ceratizitcorporation
2015-01-11 Reading quantity 2887
introduction：High performance plastic 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 often processed from self-lubricating modified engineering plastics，The size of the friction coefficient of plastic bearings directly affects the service life of the bearings and the size of the driving force required，And directly lead to the working temperature of equipment and instruments，So the friction coefficient of the bearing is the bearing designer
2015-01-11 Reading quantity 1542
introduction：First of all，IKOBearing design structure and properties，Will have 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。]Longer service life。Bearings are manufactured by forging，Heat treatment，turning，Multi-step operation of grinding and assembly。Reasonableness of treatment，advancement，Stability also affects the service life of bearings。 Heat treatment and processing of imported bearing products
2015-01-11 Reading quantity 1577
introduction：A scraper is used to remove trace metals from the surface of the machined workpiece﹐To improve the accuracy of the surface shape﹑Fitter work to improve the contact between mating surfaces。Scraping is the final finishing of various shapes in mechanical manufacturing and repair(Such as machine tool guide surface﹑Connecting surface﹑bearing bush﹑Coordinate sphere)An important method of。 Scraping is generally operated by a fitter holding a scraper﹐There are two methods of surface scraping and surface scraping(See picture Surface scraping )。Scrapers are generally made of carbon tool steel or bearings[bearing:bearing（“Beari
2015-01-11 Reading quantity 2811
introduction： Casting is the pouring of molten metal liquid into the mold，The process of making parts that are cooled and solidified to obtain the desired shape and properties。Casting is a common manufacturing method，The advantage is：Low manufacturing cost，High process flexibility，Complex shapes and large castings are available，It occupies a large proportion in machinery manufacturing，Like a machine60～80%，Cars account for25%Tractor account50～60%。The quality of castings directly affects the quality of products，therefore，Casting occupies an important position in the machinery manufacturing industry。 Casting is an ancient manufacturing method，It can be traced back in our country6000Before the New Year。follower
2015-01-11 Reading quantity 2909
introduction：Silver linear guide rail 2012ChinaLEDLighting market performance like a puddle of stagnant water，All is calm。recently，After the Chinese government introduced macro-policy regulation，LEDThe stock market was stimulated by this good news
2015-01-11 Reading quantity 60114
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