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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。]The microstructure overheating after quenching can be observed on the rough edges of the parts。But to determine exactly how overheated it is you have to look at the microstructure。ifGCr15Coarse acicular martensite appears in the quenched structure of the steel，It is quenched superheated tissue。The cause of formation may be high quenching heating temperature or heating protection
2015-03-14 Reading quantity 1434
introduction： Audi pair2011The fourth generation was launched at the beginning of the yearA6(C7)Carry out mid-term reform，It involves a four-door sedan、Wagon sumAllroad，andS6andRS6Two high-performance versions，The new car will come this year10Available monthly。 New AudiA6The lift focus is on the in-line four、V6andV8The engine has been comprehensively improved，Reduced fuel consumption，Full range meets Europe6No. Discharge standard。Besides pairA6The shape is slightly modified，Provides the latest generation of audio and video entertainment systems。 borrowA6An opportunity for medium-term reform，Audi also added two new models
2015-03-14 Reading quantity 2790
introduction： summarize one、What is part mapping Surveying is based on physical objects，By measurement，The process of drawing out a physical drawing。 Mapping is different from design，Surveying is the physical object first，Then draw the pattern；Design one Usually there is a drawing before the prototype。If you think of the design work as the process of conceiving the object，Surveying and mapping can be said to be a process of recognizing and reproducing real objects。 Mapping is often done on certain parts of the material、The characteristics should be identified by scientific analysis in many aspects，Even develop。therefore，Most surveying and mapping is of a research nature，Basically belongs to the category of product development。 zero
2015-03-14 Reading quantity 2795
introduction：KOYObearing[KOYObearing:kOYOBearings are generally required to bear large loads，Often without a cage，Instead, fill the inner and outer raceways with rolling elements。And most small and medium-sizedKOYORolling bearings are equipped with retainers。 inKOYOBearing in the processing process，The outer ring of the bearing、Inner ring、How do the roller and cage fit together。]One revolution、Raceway surface of inner ring and outer ring，Due to the rolling contact with the rolling element，Therefore, the trajectory is dark，The running track attached to the raceway surface is not abnormal，The load conditions are thus known，So in disassemblyKOYObearing[KOYO
2015-03-14 Reading quantity 1437
introduction：ANSYSCoordinate system summary Working plane（Working Plane） The working plane is the reference for creating geometric models(X,Y)plane，Used for modeling in the preprocessor(Geometry and grid) Global coordinate system At the beginning of each proceed a new oneANSYSAnalysis time，Three coordinate systems have been defined in advance。They are located at the global origin of the model。The three types are: CS,0: Global cartesian coordinate system CS,1: Global cylindrical coordinate system CS,2: Global spherical coordinate system Node coordinates in the database are always
2015-03-14 Reading quantity 2877
introduction：The cylinder must be installed firmly and reliably in strict accordance with the technical requirements，There must be nothing loose。When installing a reciprocating cylinder，The following should be done： 1、Before installation，The end of the shaft must be carefully examined、The processing quality of holes and locks，Chamfer and remove burrs，Then wash with kerosene or gasoline and blow dry。 2、Mounting surface and sliding surface of piston，A certain degree of parallelism and perpendicularity should be maintained。 3、The center line of the cylinder should be concentric with the line of action of the load force，To avoid causing normal force。Otherwise, the sealing body or piston is easy to wear。 4、Piston rod end pin hole should be with earring pin hole(Or trunnion)In the same direction，Otherwise oil
2015-03-14 Reading quantity 2779
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。]Emit evenly and continuously“sizzle”The sound。This sound is produced by rotating the roller in the inner and outer rings，Contains irregular metal vibration sounds independent of speed。Generally, it is not enough grease in the bearing，Should be supplemented。If the equipment downtime is too long，,
2015-03-14 Reading quantity 1456
introduction：qizhongji guidao Crane track crane railway A crane route laid by rail，It can ensure that the crane runs along the specified line，And transfer wheel pressure to the foundation。The track usually consists of two steel rails，A crane with a heavy load，For example, the track of a large cable crane is composed of multiple steel rails。Depending on the purpose and type of crane，Ordinary railway rails can be used、Special crane rail（See picture[Crane rail]）Or rails with square and rectangular sections。Compared with ordinary railway rail，Special crane rail head width、Small height
2015-03-14 Reading quantity 2792
introduction： The main task of roughing is to stretch the slab or flat ingot to the desired width and make a large compression extension。According to raw material conditions and product requirements，A variety of rolling methods can be selected。These methods are full longitudinal rolling methods、Combined rolling process、Full transverse rolling method、Angle rolling-Longitudinal rolling method。 A Full longitudinal rolling method The so-called longitudinal rolling is the extension direction and raw materials of the steel plate（Steel ingot or billet）Rolling method in which the direction of the longitudinal axis is consistent。When the width of the raw material is slightly greater than or equal to the width of the finished steel plate, it can be rolled without broadening，And straight longitudinal rolling into the finished product，Thats why its called full longitudinal rolling。Full longitudinal rolling method has high yield because of its simple operation，
2015-03-14 Reading quantity 1462
introduction：Phosphating and chromates The metal contains free phosphoric acid and a soluble base﹑In acid﹐The material protection technology of insoluble phosphate film was obtained by using the change of solution pH near the surface。This membrane is metal in the containing 6An amorphous, nonporous protective coating formed in a solution of chromic and mineral acids。Phosphating is widely used in the pretreatment of advanced coating layers of iron and steel products﹐It can also be used in combination with anti-rust grease﹐Extend the effective protection period。Phosphating is generally carried out at temperatures close to the boiling point of the solution﹐The sludge in the alkalizing tank needs to be cleaned frequently。Chromate is widely used in zinc die casting﹑Hot dip zinc parts and galvanized cadmium parts﹐The shape
2015-03-14 Reading quantity 2810
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