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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。]Chinese and English comparison of terms-1： adapterbearingBearing with solid sleeve adjustablebearingAdjustable bearing adjustablec
2015-02-07 Reading quantity 1460
introduction：Generally speaking，Proper usetimkenbearing[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。]，Fatigue life can be achieved。But if an unexpected early injury occurs，It can no longer be used。Different from fatigue life，This early damage，Its called a malfunction or an accident。Many causes are installation、Use、Poor lubrication，Intrude from outside
2015-02-07 Reading quantity 1458
introduction： one、Technical overview Virtual manufacturing technology（Virtual Manufacturing Technology, or VMT）is80A new idea that was put forward and developed rapidly in the late 1990s。It is based on virtual reality and simulation technology，Design of the product、Unified modeling of production process，Implement product from design on computer、Processing and assembly、inspect、Use simulations and simulations throughout the life cycle。In this way，Products and their properties and manufacturing processes can be simulated at the design stage of the product，In order to
2015-02-07 Reading quantity 2806
introduction：1 GB/T 10433-2002 Cylindrical head stud for arc stud welding 2 GB/T 15856.1-2002 Cross recessed pan head self-drilling self-tapping screw 3 GB/T 15856.2-2002 Cross recessed countersunk head self-drilling self-tapping screw 4 GB/T 15856.3-2002 Cross recessed semi-countersunk head self-drilling self-tapping screw 5 GB/T 15856.4-2002 Self-drilling self-tapping screws with hexagonal flange face 6 GB/T 15856.5-2002 Hexagonal flange self-drilling self-tapping screw
2015-02-07 Reading quantity 2820
introduction： Single shaft shredder reducer maintenance and maintenance one、Fair use 1.The working temperature of the reducer is-10～40℃，altitude1000mbelow。 2.Must not use high pressure cleaning equipment to clean the reducer。 3.The reducer is repaired、upkeep、maintenance、Installation must be carried out when the reducer is not working。 4.Welding shall not be performed on the reducer，Nor shall it be used as a ground point for welding work。Welding results in precision gear teeth and bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor
2015-02-07 Reading quantity 2810
introduction：On the basis of《“The 12th Five-Year Plan”Energy conservation and environmental protection industry development plan》policy，It will introduce relevant preferential policies and tax support for the development of several energy-saving and environmental protection industries in China，It is bound to bring many benefits to enterprises that produce energy-saving and environmental protection equipment。In these devices，The advantages of frequency converter in energy saving and environmental protection are obvious。Electric motors are used in a large number of transmission systems in industry，The effect of energy saving is achieved by changing the working frequency and amplitude of the inverter，The inverter industry has benefited a lot。 “The 12th Five-Year Plan”Development planning inverter industry has benefited a lot 1967years，The worlds first frequency converter was successfully developed，And put into commercial shipment
2015-02-07 Reading quantity 2881
introduction： An instrument for measuring the total pressure of a rarefied gas below atmospheric pressure﹐Also known as vacuum gauge。The measuring unit of the vacuum gauge is the same as the pressure measuring unit﹐The international unit of pressure is paras(Pa)﹐The units used also have brackets(Torr)And millibar(mbar)Etc.。 Brief history Since the1643Italian physicistE.Since Torricellis atmospheric pressure experiments﹐There have been many kinds of vacuum gauges。The first to appear isＵV-tube vacuum gauge﹐It can only be used to measure coarse vacuum and low vacuum。1874years﹐H.G.
2015-02-07 Reading quantity 2798
introduction：A class of polymer materials formed by a large number of gas micropores dispersed in a solid plastic，With light weight、Thermal insulation、Sound absorption、Shock absorption and other features，The dielectric property is better than that of matrix resin，Very versatile。Almost all kinds of plastics can be made into foam，Foam forming has become an important field in plastic processing。20century60The structural foam developed in the decade，Foam in core layer、The skin is characterized by non-foaming，Hard on the outside but tough on the inside，Specific strength（Strength per unit mass）high，lossy，Increasingly widely used instead of wood in the construction and furniture industries。Chemical or radiative cross-linking foaming techniques for polyolefin were successful，styroify
2015-02-07 Reading quantity 2798
introduction：by4A specially arranged spatial linkage consisting of two rotating pairs(See picture[Bennett mechanism])。Such an institution is the British Bennett Yu 1903proposed。In general,by4The degree of freedom of a space mechanism composed of two rotating pairs is zero，But Bennett made a special arrangement，This kind of institution got 1Per degree of freedom。The conditions of institutional arrangement are：①The relative length of the rod is equal，The alternate angles of the rotating auxiliary axes are equal；②The cross-angle of the rotating auxiliary axis of the bar is reversed，That is, the cross Angle of a bar is or，Then the cross Angle of its opposite rod is-or-；③The cross-angle between the length of the member and the rotating auxiliary axis is satisfied[00
2015-02-07 Reading quantity 2802
introduction： 1、Oil absorption and pressure processes Suction and pressure of fuel injection pump，It is completed by the reciprocating movement of the plunger in the plunger sleeve。When the plunger is in the lower position，The two oil holes on the plunger sleeve are opened，The inner cavity of the plunger sleeve communicates with the oil passage in the pump body，Fuel quickly fills the tank。 When the CAM is on the roller of the roller body，The plunger rises。Move upward from the beginning of the plunger until the oil hole is blocked by the upper end face of the plunger。In this period of time，Due to plunger movement，Fuel is squeezed out of the oil chamber，Flow passage。So this lift is called pretravel。When the plunger blocks the oil hole
2015-02-07 Reading quantity 2882
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