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introduction： Precision machine workpiece machining allowance can also become blank allowance，Refers to the difference between the blank size and the part drawing design size。In general，We can understand the thickness of the metal layer cut on the surface of the workpiece during the processing of the workpiece。What methods will we use in daily life to calculate the machining allowance of precision mechanical workpiece？There are three common methods。 1）Look-up table method。Machining allowance data according to the relevant manual，Combined with the actual production situation of the factory to be corrected to determine the processing allowance。It is widely available in various factories，Method adopted。 2）Empirical estimation method 。According to process
2014-12-18 Reading quantity 1610
introduction： Alloy steel with high strength and good chemical stability at high temperatures。It includes anti-oxidant steel(Or high temperature non-peeling steel)And heat strength steel two types。Oxidation resistant steel generally requires better chemical stability﹐But the load is lower。Heat strength steels require higher high temperature strength and corresponding oxidation resistance。Heat-resistant steel is often used to make boilers﹑Steam turbine﹑Power machinery﹑Industrial furnaces and aviation﹑Parts that work at high temperatures in industries such as petrochemicals。These components require high temperature strength and resistance to high temperature oxidation
2014-12-18 Reading quantity 2823
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。]It is one of the important components of construction machinery，Poor installation will affect its use effect，It even causes the failure of construction machinery and equipment。 INAbearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is used to fix and reduce the load during mechanical transmission
2014-12-18 Reading quantity 1588
introduction： Subtract the bearing from the theoretical clearance[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。]When installed on the shaft or in the housing, the amount of expansion of the ring caused by interference fit or the gap after contraction is called“Installation clearance”。 Add a factor bearing to the mounting clearance[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）is
2014-12-18 Reading quantity 1495
introduction：By use、Material properties and other factors to choose the appropriate centrifuge，To achieve the desired purpose。Selection of the following three problems must be paid attention to： 1、Corrosion resistance：The materials separated by centrifuges are generally corrosive，The material of the part in contact with the material，Must be able to meet the requirements of corrosion resistance，To ensure safe use。 Structural parts material type（304、321、316L、Titanium plate）、Sealing ring、Gasket material，Surface treatment（Lining molding、Line with rubber、Surface coating），And the material of the filter cloth should be determined in the selection。The properties of materials can be used in the selection
2014-12-18 Reading quantity 2813
introduction： Turntable 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 seat is one that can accept a combined load、Construction of special large and extra-large bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is used to fix and reduce the load friction system during mechanical transmission
2014-12-18 Reading quantity 1486
introduction：Due to the relative movement of rolling element and raceway and the invasion of dirt and dust，Wear the surface of the rolling element and raceway。When the amount of wear is large，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。]play、noise、Vibration augmentation，Lowered bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It was mechanically driven
2014-12-18 Reading quantity 1508
introduction： 1.Whether the outer packing is clear：In general，The factory brands have their own specialized designers for external packaging design，And arrange the production of factories with satisfactory production conditions，Therefore, the packaging is very clear from lines to color blocks，In no uncertain terms。 Whether the steel seal is clear：In 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 machine used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed
2014-12-18 Reading quantity 1470
introduction： After decades of efforts and high-speed cutting related technologies gradually mature，As yet，High-speed cutting technology is rapidly rising as an advanced manufacturing technology，It has a profound impact on the development of machinery manufacturing industry。The key technology to realize high-speed cutting is to research and develop high-speed cutting machine tools with excellent performance，Since the20century80Since mid-decade，The development of high-speed cutting machine tools has become the mainstream of international machine tool industry technology development。At present, high-speed machining centers and other high-speed CNC machine tools that meet the requirements of high-speed cutting have become popular applications in industrial developed countries，But our country is also accelerating the development of high-speed processing center
2014-12-18 Reading quantity 2801
introduction： Scope of application DWTSeries belt dryer is a continuous drying equipment for mass production。Used for sheet with good air permeability、strip、Drying of granular materials。For dehydrated vegetables、High water content of TCM decoction pieces、The material temperature is not allowed to be high material is particularly suitable，This series of drying machine has high drying speed、High evaporation intensity。Good product quality advantages，Dehydrated filter cakes of the paste family，It can also be dried after granulation into a rod。 Working principle The principle is shown in the figure。The material in the hopper is fed by the feeder(6
2014-12-18 Reading quantity 2797
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