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introduction：three、Methods for surface treatment of copper and copper alloys [method1] Common degreasing solvent：trichloroethylene、acetone、butanone、Ethyl acetate。 [method2] Degreasing after abrasive blasting or abrading。 [method3] In the following solution25-30°Cimpregnate1min ； Concentrated sulfuric acid 8 Concentrated nitric acid 25 water 17 Then wash，in50-60°CBottom drying。 [method4] In the following solution60-70°Cimpregnate10min
2015-01-30 Reading quantity 2896
introduction： 1.What is downmilling？What is inverse milling？What are the characteristics of up-milling and up-milling of CNC machine tools？ Down milling:Cutting forceFThe horizontal componentFxThe direction of the feed and the direction of the feedfalike,This milling method milling:Cutting forceFThe horizontal componentFxThe direction of the feed and the direction of the feedfOn the contrary,This milling method Down milling characteristics:①Easy to produce movement,A downmilling mechanism is required.（Because of the gap between screws） ②The machining surface quality is higher than the inverse milling.（Suitable for finishing） Back milling feature:①High working stability,No reverse milling mechanism is required ②Machined surface
2015-01-30 Reading quantity 2912
introduction：INAbearing[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。]After installation，To check that the installation is correct，An operational check is required。Small machines can be turned by hand，To make sure the rotation is smooth。Check items for foreign bodies、scar、Poor operation due to indentation，Due to poor installation，The torque caused by poor machining of the mounting seat is unstable
2015-01-30 Reading quantity 1467
introduction： 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。]Positioning of inner ring When installing the bearing inner ring on the shaft，Generally, the bearing is fixed on one side by the shaft shoulder，And the other side uses nuts、Lock washer or spring stop ring, etc。Dimensions of the shaft shoulder and the contact part of the axial fixed part with the bearing inner ring，Can press bearing ruler
2015-01-30 Reading quantity 1623
introduction： 1、Long life and wear resistance--All-ceramic 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 fatigue life is expected to be longer than that of all-steel bearings10－50times，Hybrid ceramic bearing，The life is also higher than that of all-steel bearings3-5About times； 2、High speed and acceleration--Can be found indnBe worth more than300myriad
2015-01-30 Reading quantity 1581
introduction： grinding﹑A granular material used for cutting in grinding and polishing。Abrasives are mainly used in the manufacture of abrasive tools﹐It can also be used directly for some grinding and polishing jobs。 Abrasives should have the following basic properties﹕Higher hardness﹐It should generally be higher than the material being processed﹔Appropriate strength﹐When the abrasive cutting edge is still sharp, it can withstand the cutting force without breaking﹐When the cutting edge is blunted to a certain extent, it can be partially broken to reveal a new sharp edge﹔High temperature stability﹐It maintains its inherent hardness and strength at grinding temperatures
2015-01-30 Reading quantity 2804
introduction： KOYOThe clearance between the bearing and the shaft must be suitable，Can makeKOYOThe service life of bearings is longer，amongKOYOThe following methods can be used to detect the radial clearance of bearings： one、Measuring tape method For larger diametersKOYObearing[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，It is used to reduce the coefficient of friction in the process of power transmission and maintain the center position of the shaft
2015-01-30 Reading quantity 1553
introduction：1．First lookTIMKENbearing[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 outer box，The general packaging box is white lettering、Blue background、Theres a red bar down there。But the products of the last two years have flower boxes，The design is a number of trademarks。 2．seeTIMKENBearing production date，If you open it from the sideTIMKENBearing pack
2015-01-30 Reading quantity 1573
introduction：(1)Guarantee assembly quality。To ensure the quality of assembly，The factory bought and made some special tools，Remove and install reducer worm gear、worm、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。]、Gear and other components，Try to avoid direct tapping with other tools such as a hammer;Gear change、Worm gear when worm，Try to use original parts and accessories
2015-01-30 Reading quantity 2906
introduction： A device for measuring the output torque or driving torque of a machine。If you measure the speed of the machine at the same time﹐The output power or drive power of the machine can also be calculated。Dynamometer is mainly used to measure generator﹑motor﹑Internal combustion engine﹑Shaft power characteristics of machinery such as gas turbines and pumps。Some dynamometers can both absorb the mechanical energy of the machine under test and determine its output power﹐Energy can also be emitted to determine the driving power of the machine。Dynamometer has mechanical type﹑Hydraulic type﹑Electric and eddy current。Mechanical dynamometer has simple structure﹐However, it is rarely used because of the unstable friction coefficient and other shortcomings。Neutral hydraulic type﹑Electric or eddy current dynamometer﹐Both have one
2015-01-30 Reading quantity 2789
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