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byTIMKENbearing[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 steel degree determined by the structural design parameters，compliance，Quality，The vibration system composed of damping and so on will produce vibration which is suitable to its mechanics under running conditions。 Vibration caused by deviations in manufacturing processes，The smaller the deviation，The smaller the vibration。The roundness of the surface of the ball、ripple
sequence Change the name of the feature designation 1 material material change change The ring is made of stainless steel X
compre sion molding Compression forming flash mold Overflow mold plsitive mold Extrusion die split mold Split die cavity type-control Master die core Die core Male die taper taper leather cloak Imitation leather shiver ornamentation flow mark Rill mark welding mark Solder mark post screw
Drill holes with various drill bits﹑Cutting of reaming or countersinking。The drilling is done with a twist drill﹑A flat drill or center drill is used to drill through or blind holes in solid materials。Reaming is the use of a reaming drill to enlarge the aperture of the prefabricated hole on the workpiece。Spot facing(figure1 Spot facing )Countersink drill is used to process countersink holes at one end of prefabricated holes﹑Taper hole﹑Local plane or sphere, etc﹐To install fasteners。There are two main ways to drill﹕①Work immobility﹐The bit rotates and feeds axially﹐This way is generally in the drill press﹑Boring machine﹑Applications on machining centers or combined machine tools﹔②Workpiece rotation﹐The drill is only used for axial feed﹐This way is generally in a lathe or deep hole
Heavy loadSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]Application problem of，Must combine overloadSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”
1．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。]Contact fatigue failure Contact fatigue failure refers to the 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 are opposite each other on the shaft
The repaired parts must be normalized during heat treatment，The structural parts requiring mechanical properties must be tempered after normalizing to meet the requirements of mechanical properties。In the、After normalizing high alloy steel and large forgings, high temperature tempering must be added to eliminate the internal stress caused by normalizing。 Some alloy steels produce partial martensitic transformation during forging，Hard tissue。In order to eliminate this undesirable tissue when normalizing，Higher than normal normalizing temperature20℃Normalize the left and right heating and holding。 1 Multistep machining NSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1
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 vibration is basically caused by the 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，To reduce power transmission
High temperature 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 shaft support system requires high rigidity，It also requires that the mass be as light as possible，To overcome this contradiction，Measures such as reducing surface roughness and increasing surface strengthening can be taken to improve the support stiffness，Hollow shafts are used to reduce system mass, etc。
The body of the car is composed of metal components and cover parts。All kinds of pre-made structural parts，For example, wind window posts，Door pillar、Above the door、Front and rear hoppers、Front and rear coaming、Parts such as the top cover are assembled by welding and riveting。Among them, welding is an indispensable process in the automobile assembly line。 Body welding is mainly resistance welding、Seam welding、Carbon dioxide welding and other methods。Resistance welding melts the contact surface of a part by applying a current to the spot welding electrode，And then its held together under pressure，It is mainly used for welding of body components and frames。Roll for seam welding
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