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introduction：Before it was put into operation，Fill the reducer with the recommended type and value of grease。The reducer is lubricated with lubricating oil。For vertical mounted reducer， Whereas lubricating oil may not guarantee the top 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。]Reliable lubrication，Therefore, additional lubrication measures are used。 Before operation
2014-12-29 Reading quantity 2859
introduction：Using solid-state transformation，The quenching treatment of the surface layer of the part by rapid heating method is called surface heat treatment，Surface hardening。Including flame heating quenching、high(In the)Frequency induction hardening、Laser heating or electron beam heating quenching。The characteristics of these methods are：The surface is locally heated and quenched，Small workpiece deformation；Fast heating speed，High production efficiency；Short heating time，Surface oxidation and decarburization are slight。 Plastic deformation of metal surface layer by mechanical method，Thus forming a hardened layer of high hardness and high strength，This method of surface strengthening is called surface deformation strengthening，Also known as work hardening。Including shot peening、spray
2014-12-29 Reading quantity 1591
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。]Mechanical damage refers to different degrees of grooves on the alloy surface of the bearing，In severe cases, metal stripping occurs on the contact surface and large, messy scratches appear；In general，Contact surface damage and ablative phenomena exist simultaneously。Bring aboutKOYOThe main causes of bearing mechanical damage areKOYO
2014-12-28 Reading quantity 1571
introduction：Welding method using the flame of gas combustion as the heat source(See picture Gas welding diagram )。acetylene (C2H2)It is the most commonly used flammable gas。The chemical process of oxygen and acetylene combustion is 2C2H2+SO2→4CO+2H2+3O2+heat→4CO2+2H2O+heat。The resulting flame can be adjusted to4Species form﹐They are suitable for welding of different metals and alloys(See table Forms and applications of oxyacetylene flame )。The hydrogen and carbon dioxide produced by the oxyacetylene flame have a certain effect on melting metals
2014-12-28 Reading quantity 2837
introduction：Application background： 2000years11month4diurnal《Ministry of Education on implementation in primary and secondary schools“School-to-school connection”Notice of works》In the，Required by the Ministry of Education5～10Years of time make90%About the realization of independent establishment of primary and secondary schools"School-to-school connection"，And the provisions to2005Turn of the year2010Two phases of the year mission requirements。This project will improve the level of information education in primary and secondary schools，Adapt to the requirements of informationization and knowledge economy，It is undoubtedly of great significance。 Our country has a vast territory，The development of terrestrial network infrastructure is uneven。This situation determines that the education information solution based on the ground network can not be full
2014-12-28 Reading quantity 2875
introduction：English common thread (Wyeth thread) -- Coarse teeth (BSW) Nominal size Ww Tooth type designation Major diameter mm d=D Screw pitch mm p Teeth per inch tpi Pitch diameter mm d2=D2 footpath
2014-12-28 Reading quantity 2881
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。]All by the outer ring、Inner ring、The rolling body and the cage are composed of four parts。Its structure is shown in the figure1-1（Refer to appendix）usual，Rolling bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is used to fix and reduce load friction during mechanical transmission
2014-12-28 Reading quantity 1605
introduction： 1．Screw loose fixationIKOBolt for bearing seat。willIKOBearing togetherIKOThe bearing seat is removed from the shaft together。Note the one at the end of the shaftIKObearing[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。]preseat．Should be the other end of the shaftIK
2014-12-28 Reading quantity 1582
introduction：High-speed cutting is a rapidly developing high-tech in the manufacturing industry in the world today。In modern industrially developed countries，High speed cutting is a new machining concept，Recognized by more and more mechanical engineers。And high cutting efficiency and high cutting precision brought by high-speed cutting，It is also to continuously meet the needs of the continuous development of the manufacturing industry。The parts production efficiency pursued by the automotive industry and the cutting of hard materials for precision molds pursued by the mold manufacturing industry，All of them promote the rapid development of high-speed cutting technology。 one、Typical application of high speed milling machine in manufacturing industry Use a small cutting amount、The high cutting speed replaces the traditional large cutting amount、
2014-12-28 Reading quantity 2829
introduction：shengchuandong Rope drive rope drive A mechanical transmission that transmits power and motion by the friction between a rope wrapped tightly around a grooved wheel。The rope used for transmission is cotton rope、Hemp rope、Polyester rope and wire rope, etc。The first three winding methods on the driving wheel and driven wheel are multi-rope winding and single-rope continuous winding，Multi-rope winding is similar to the triangular belt drive as many parallel，Single rope continuous winding A long rope is wound several times over two grooved wheels，And pulled by tension pulley（See picture[Rope drive diagram]）。Wire ropes are generally transmitted by only one wire
2014-12-28 Reading quantity 2832
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