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introduction： Environmental pollution caused by harmful substances in automobile exhaust。Among the harmful substances is carbon monoxide (CO)﹑hydrocarbon(hydrocarbon)﹑aldehyde(CHO)﹑oxynitride(NOx)﹑ozone(O3)﹑Sulfur dioxide﹑Lead and acid compounds, etc﹐One of the most harmfulCO﹑NOx ﹑Hydrocarbons and lead compounds。In large cities where cars are concentrated﹐In the air50％Left and right pollutants come from the exhaust of cars﹐The harmful substances in the exhaust often reach the extent that they are harmful to the human body。 70Early era﹐Some car companies
2014-12-27 Reading quantity 2803
introduction：Since the beginning of the year，Many breweries have been adversely affected by rising raw material prices。Because many companies are not able to increase the price of products because of rising raw material prices，Many beer companies are overwhelmed，We have to find ways to reduce costs in production。 Many beer companies are starting to think in terms of raw materials，Barley is the main raw material for beer production、Hops and hop products、yeast、Water and auxiliary materials。The ingredients include rice、Corn and corn starch、Wheat、Sugar and starch syrups, barley syrups, etc。 Auxiliary materials should be added appropriately in saccharification，It can serve the following functions：
2014-12-27 Reading quantity 2792
introduction：Under the premise of selecting a good cage structure，It can be loaded more rolling body，And do not open a ball notch on the ring or use the bearing that causes the ring to have too much deformation and install more rolling elements[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。]To be preferred。In addition，Bearings with relatively little internal slip[bearing:bearing（“Bearing”，Japanese person
2014-12-27 Reading quantity 1441
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。]Clean before installation。At installation，Special tools should be usedSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Sweden
2014-12-27 Reading quantity 1440
introduction：pick to：The componentized design of virtual machine tool machining system enables us to build a multi-bus system、Parallel virtual systems。This system can complete virtual machining，Optimize the processing technology、The objective of forecasting and testing machining quality。In this paper, some basic problems of the system architecture are studied。Due to the use of component technology，Make the system open、More scalable，More flexible structure。And make the virtual machine tool machining system with other virtual systems as wellCAD/CAMSystem、The collaboration between the processing sites on the manufacturing network is more tacit。At the same time, it also laid a good foundation for the future work。
2014-12-27 Reading quantity 2784
introduction：Because the specifications of the silver guide rail are relatively large，It was shipped back to China by sea from Japan，So to save on shipping costs，We used extra long containers with cheaper freight，Therefore, the newly imported silver guide rail needs to be cut according to the needs of users。
2014-12-27 Reading quantity 33091
introduction：Worm gear reducer is characterized by a reverse self-locking function，Can have a large deceleration ratio，The input and output axes are not on the same axis，Its not on the same plane。But it is generally larger，Transmission efficiency is not high，Low precision。The harmonic transmission of the harmonic reducer uses the controllable elastic deformation of flexible components to transmit motion and power，Small volume、High precision，But the disadvantage is that the flexible wheel life is limited、Shock intolerance，The rigidity is poor compared with metal parts。The input speed cannot be too high。The advantage of the planetary reducer is that the structure is relatively compact，Small return clearance、High precision，Long service life，Rated output torque can do very well
2014-12-27 Reading quantity 2785
introduction： （1）、How is the engine produced according to the age，Select oil for harsh working conditions。 Diesel engine oil selection Diesel engine oil can be selected according to the strength of diesel engine oil。The intensification scale of diesel engine is generally expressed by the intensification coefficient，The greater the strengthening coefficient，hot、The higher the mechanical load，The harsher the operating conditions of the oil，High grade diesel engine oil is required。tabulable1To choose from。 According to the different requirements for lubrication of diesel engines of different ages，Corresponding lubrication standards established by the American Petroleum Institute，table1
2014-12-27 Reading quantity 1452
introduction： （1）Read technical documents According to 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 inner diameter dimensions and 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 machinery in the shaft
2014-12-27 Reading quantity 1445
introduction： School of Materials Science and Engineering, Shanghai Jiao Tong University，Shanghai200030 Abstract:adoptNd:YAGApplication advantages and processing mechanism of laser in galvanized sheet wire filling welding，The experimental results are analyzed。The process test proves that the laser brazing of filling wire can be done under suitable conditions，Can get shape well、A joint with fewer defects and qualified performance。 keyword:Galvanized plate,Laser welding,Wire brazing introduction Galvanized steel plate is widely used in automobile body and home appliance manufacturing。The zinc layer produced by hot plating or electroplating process is used to isolate the base steel plate from the air、Contact with water, etc，and
2014-12-27 Reading quantity 2791
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