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introduction：With the popularity of CNC machine tools，Thread milling technology is used more and more in machinery manufacturing industry。Thread milling is a three-axis linkage of CNC machine tools，The thread is formed by spiral interpolation milling with thread milling cutter，The tool moves once a circle on the horizontal plane，In the vertical plane it moves one pitch in a straight line。Thread milling has high processing efficiency、High thread quality、Good tool versatility、Good processing safety and many other advantages。There are many kinds of thread milling tools in use at present，This paper will focus on the application characteristics、Tool structure、Several common thread milling cutters are analyzed and introduced from the Angle of processing technology。 1
2015-01-02 Reading quantity 2811
introduction： Constant pressure preloading is done with coil springs、Dished spring etcINAbearing[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 key points to meet the preload are obtained。The rigidity of the preloaded spring—General ratioINABearings are much less rigid，It is pre-tightened at constant pressureINABearing relative position will be in use
2015-01-02 Reading quantity 1479
introduction： one summarize TH66The alloy is nickel matrix，At the same time, the strengthening element aluminum is added，An age-hardened alloy developed from titanium and the refractory metal niobium。The alloy has good comprehensive properties，Uniform fine grain，High yield strength，Stable organization in high temperature working environment。Suitable at temperatures of750-800℃The working environment for long-term use。 two The composition and properties of the alloy 1 The alloy composition is listed below C Cr Al Ti Nb Ni 0.05 2
2015-01-02 Reading quantity 2828
introduction：TIMKENbearing[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 limit speed is the limit value at which no friction heat causing burns can be generated and continuous rotation can be achieved。WuxiTIMKENBearing limit speed is affectedTIMKENBearing size，type，oiling，precision，Oil gap，Load and other factors，But the most important thing is
2015-01-02 Reading quantity 1481
introduction：This paper focuses on distributed system control（DCS）Applications in power plants，The design idea of the main control function is described in detail。1．Power generation system configuration1．1DCSPower plant control system，Plant setup1Nested distributed control system(DCS)，The system operation mode combining centralized operation and decentralized control of each section。The system adopts German Siemens companySIMATICPCS7New control system，The entire system is controlled by an engineer station、Five operating stations、A data file station、Five processing centers are formed。Control system communication with modern high-speed Ethernet（10/1
2015-01-02 Reading quantity 2894
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。]Rust prevention is an important work，Especially rust prevention between processes，Like bearings in the heat treatment workshop after pickling、cleanse、After grinding，There are many more steps。When the product is not manufactured in flow，Once processed sequentially, it is stored
2015-01-02 Reading quantity 1587
introduction：Continuous hot dip galvanizing wire Color coated steel plate production line uncoiler→Double shear→connector→Edge flattening machine→Inlet looper→pretreatment→Chemical coating→Chemical drying→Primary coater→Primary oven→1Number quenching→Finishing coater→Finishing oven→2Number quenching→Waste gas incinerator→Outlet looper→Slitting machine→Recoiling machine→weigh→Product packaging Process control system Shearing line Charging trolley→Single or double support uncoiler→Levelling machine→Go over the bridge→Correction feed device→Slitting machine→Scrap edge winder→Cross shear
2015-01-02 Reading quantity 2854
introduction： News summary:ImagewarePerfect free shape modeling and detection technology ImagewareProducts provide modeling and application driven solutions in the following areas： Free shape product design、Fast surface、High quality surface、Reverse engineering、Computer aided check、Polygon modeling、Rapid prototyping，Enables customers to accurately design, build and fully test high-quality free-form products in a very short time。 5day Basic moduleImageware SurfacingIs a powerful one、 ImagewareAfter the
2015-01-02 Reading quantity 2883
introduction： 1. Ball-and-fork universal joint According to the different shape of the steel ball raceway, the ball-fork universal joint can be divided into two forms: circular groove and straight groove。 Spherical fork universal joint with circular groove raceway type(figure4—6a)Consists of two universal-joint forks、It consists of four transmission steel balls and one centering steel ball。The center line of the circular groove on the two ball forks isO1andO2Circles with equal radii for their centers，O1andO2To the center of the universal jointOequidistant。When the universal-joint two axes are centered around the center of the ballOWhen turning at any Angle，The center of the ball is always at the intersection of the two circles in the center of the raceway，Thus, the output shaft and the input shaft rotate at the same speed。This ball-and-fork type
2015-01-02 Reading quantity 1625
introduction：1、TIMKENbearing[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 fit to the journal is uneven or the contact surface is too small（The fit gap is too small），The specific pressure per unit area is too large，Most of this happens after a new machine is tested or a new bearing is replaced； 2、Bearing skew or crankshaft bend、contort； 3、Bearing quality is not
2015-01-02 Reading quantity 1498
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