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introduction： In a rapidly changing product market，Whether it can quickly produce products that meet the requirements of the market becomes the key to the success of the enterprise，And often we all have this problem，It is when the customer gives you only a physical sample or hand model，No drawings orCADData file，The engineers couldnt get the exact dimensions，Making molds is even more cumbersome。 Using traditional carving methods，The time is long and the effect is not good，This is where you need an all-in-one solution：Sample from→data→product，Reverse-engineered systems provide a whole new dimension for manufacturing specifically、The 3D manufacturing road
2015-05-18 Reading quantity 2928
introduction： allowance 1．concentricity： Outside diameter 3/4” 1” 11/2” 2” Inside diameter 1/4” 1/2” 3/4” 1” Deviation rate 0.008 0.010 0.010 0.016 2．Flatness and straightness Against distortion、Bending by definition，Does not refer to the degree of surface irregularity，This can be achieved when correction methods are allowed0.003——0.005"/1" 3．radius：Generally speaking0.016"/1" Better be able to0.005"/<
2015-05-18 Reading quantity 2851
introduction：Magnetic 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 a form of supporting load or suspension rotor by magnetic field force。This bearing has developed rapidly in recent years，Especially at high speed、Low friction、high(low)Applications in warm and vacuum environments。Compared with other bearing forms, magnetic bearing has its unique advantages，Its very promising。 A few
2015-05-18 Reading quantity 1613
introduction： A component arranged in the boiler for reheating the exhaust steam from the high pressure or medium pressure cylinder of the turbine to the required temperature。 effect In order to improve the cycle thermal efficiency of large generator set﹐Intermediate reheat cycles are widely used。The main steam from the boiler superheater after work in the high pressure cylinder of the turbine﹐To be reheated in a reheater to raise the temperature﹐Then it is sent to the middle pressure cylinder of the steam turbine to continue to expand for work﹐This is called an intermediate reheat cycle﹐The cycle efficiency can be relatively improved4～5％。Some large units﹐After the medium pressure cylinder, the exhaust steam is returned to the boiler for heating﹐It is called two intermediate reheat cycles﹐Can be relatively improved circulation
2015-05-18 Reading quantity 2837
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。]As the main components of the locomotive，Especially traction motors、Axle box bearing，Its function plays an important role in safe transportation，When the locomotive is running on line，In case of bearing failure，It will take the entire train out of service，Blocking the main transport line，In particular, passenger trains broke down，Caused by
2015-05-18 Reading quantity 1660
introduction： 1．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。]The coefficient of friction is smaller than that of plain bearings,High transmission efficiency。The friction coefficient of the general plain bearing is0.08-0.12,While rollingKOYObearing[KOYObearing:kOYOBearings are generally required to bear more
2015-05-18 Reading quantity 1506
introduction： Gate is a key material flow channel in gating system，Except for the main channel gate，Most gates are the smallest part of the gating system，Its value is generally only the cross-sectional area of the diverter3％～9％。 For plastic melts that obey Newtonian flow laws，Because its viscosity is independent of shear rate，Large gate cross-sectional area can reduce flow resistance，Increase melt flow rate，This is more beneficial to the filling and molding quality。For the vast majority of plastic melts that do not obey Newtonian flow laws，The gate cross-sectional area is reduced，However, it is often possible to increase the melt shear rate，
2015-05-17 Reading quantity 2864
introduction：On the basis ofFAGbearing[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。]Formation mechanism of grinding metamorphic layer on working surface，The main factors affecting the grinding metamorphic layer are grinding heat and grinding force。The following is an analysis aboutFAGbearing[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。]Cause of failure。 1.FAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、
2015-05-17 Reading quantity 1531
introduction：In the case of grease lubrication，If the recommended amount of grease is added toTIMKENbearing[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。]In the（Or for supplementary lubrication），During the first few working hours or working days（Depending on the speed of the application），TIMKENThe friction generated by the bearing will be much higher than the original calculated value。this
2015-05-17 Reading quantity 1610
introduction：gongcheng dinge Engineering quota project quota Under prescribed working conditions，Complete qualified unit building installation products，The labor force required、Materials、equipment、Quantitative criteria for equipment and related costs。According to its constituent content，It can also be divided into labor quotas（Quota of working hours or quantity of production）、Material consumption quota、Construction equipment usage quota、Fee rating。It doesnt just give quantitative criteria，The corresponding work content should also be specified at the same time、Technical conditions and safety、Quality and other requirements。Working hour quota refers to the reasonable labor organization，Adopt in conformity with
2015-05-17 Reading quantity 2855
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