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introduction：huoyun qiche Freight car truck A car for transporting goods，Most of them have a separate cab and a cargo box adapted to the requirements of the cargo transported(The cab and trunk of a minivan are often integrated)，Truck for short。 Type trucks are divided into two types: road trucks and off-road trucks。The main parameters of the truck are the loading capacity and the total weight。Most countries divide road trucks into several tax brackets according to their total weight。Chinas classification method is：All up weight15Heavy goods vehicles with tons or more，6～15The tonnage is a medium truck，6Light weight under tons
2015-01-10 Reading quantity 2878
introduction： 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。]Assembly is an operation that fitters often have to do in assembly and repair work，The adjustment and pre-tightening of rolling bearing clearance is an important part of rolling bearing assembly。Accurately grasp the process concepts of clearance adjustment and pre-tightening，And in the assembly work the correct use of this process
2015-01-10 Reading quantity 1516
introduction： NSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]Internal structure A——Internal design differs from the standard bearing。 A——Angular contact ball bearing，The contact Angle is30
2015-01-10 Reading quantity 1545
introduction：M-O M M *Minute *Motor *Medium *Moment *Million *Meter *Mass *Milli *points *motor *middle *Moment of force *million *meter *Quality *thousandth M Mega mega M Meter meter M Milli milli M Minute points M * Milliohm megohm M. Mounted (car)loaded M.. Mark
2015-01-10 Reading quantity 3136
introduction： Compared with general mechanical parts，FAGbearing[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。]A part is a short, thin rotating surface，The rotary body determines the machining Processing machine tools are relatively simple，The vast majority are lathes and grinders；Short and thin determines its axial stiffness is good，The axial deformation is negligible，The radial stiffness is poor，Special consideration should be given to the tightening method during processing。 Deep groove ball bearing parts are simple in structure，But the technical requirements are high，Therefore, there are several processing characteristics as follows：
2015-01-10 Reading quantity 1496
introduction：Universal rubber seal products in defense，Chemical engineering，coal，petroleum，metallurgy，The application of transportation and machinery manufacturing industry is more and more extensive，It has become the basic parts and accessories in various industries。 Rubber sealing products commonly used materials are as follows。 1 Nitrile butadiene rubber Nitrile butadiene rubber has excellent resistance to fuel oil and aromatic solvents，But not ketone resistant，Esters and hydrogen chloride and other media，Therefore, oil resistant sealing products and the use of nitrile rubber。 2Neoprene rubber Neoprene rubber has good resistance to oil and solvent。It has good resistance to gear oil and transformer oil，But not tolerant of aromatic oils。Neoprene rubber
2015-01-10 Reading quantity 1483
introduction： Modern machines require 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 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。]Under high load、High rotation speed、With high rotation accuracy，In a wide operating temperature range，Work with high reliability。Therefore, when manufacturing rolling bearings, whether the selection of materials is appropriate has a great impact on its performance。The basic requirement for the material is the failure form of the bearing
2015-01-10 Reading quantity 1609
introduction： Leather embossing mould(version)It is a key component of the ironing embossing machine for leather manufacturing special equipment，Is a leather finishing process used to finish the leather surface、Special die for embossing，For beautifying leather surfaces，Improving the leather grade has an important role。 Leather embossing mould(version)There are mainly the following categories： one、Classified by machine used 1、Leather embossing roller The mold is used in the through type ironing embossing machine。 2、Leather embossed plate The mold is used in flat ironing and embossing machine。
2015-01-10 Reading quantity 2950
introduction：Couplings can be divided into rigid couplings、Flexible coupling and safety coupling three categories。 Each of these categories may have a number of varieties， Such as： Rigid couplings may also have flanged couplings、Sleeve coupling, etc。 Rigid couplings can only be used to join two strictly coaxial axes。 And flexible coupling，Due to the special design of the structure，Therefore, it has many functions。 Such as: 1、Compensation for axial displacement of the two connected axes due to manufacturing and installation errors,Radial displacement and angular displacement，Avoid excessive additional load on the shaft end(Turtle power)。 2、Ease the reducer when working on the shaft
2015-01-10 Reading quantity 2986
introduction：Thermal cutting of materials separated by flame produced by combustion of combustible gas mixed with oxygen，Also known as oxygen cutting or flame cutting。Gas cutting time，The flame preheats the material to the ignition point at the cutting point，Then jet oxygen streams，Make the metal material intense oxidation and burning，The resulting oxide slag is blown away by air flow，notch。The purity of oxygen used for gas cutting should be greater than99％；Acetylene gas is commonly used as a flammable gas，LPG is also available、Natural gas or gas。The cutting efficiency is highest with acetylene gas，Better quality，But the cost is higher.。Gas cutting equipment is mainly cutting torch and gas source。The cutting torch produces a gas flame、A tool for transferring and regulating cutting heat energy，Its structural influence
2015-01-10 Reading quantity 2838
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