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introduction：baozhahan Explosive welding explosion welding The method of welding by using the impact force generated by explosive explosion to cause the workpiece to collide rapidly（figure1[Explosive welding diagram]）。20century 50End of era,When machining parts by explosive forming,It is found that there is a partial welding phenomenon between the part and the mold，Thus came the method of explosive welding。Explosive welding time,The explosive is usually applied directly to the surface of the cladding,Or plastic is placed between the explosive and the cladding plate、The rubber acts as a buffer。There are generally parallel gaps or angular gaps between the cladding plate and the substrate，
2015-04-17 Reading quantity 2808
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。]The gap between the jacket and the sealing cover is large、Oil spill、Change color、Bearing displacement、laceration、Rust and so on。Once the appearance fault feature is found during the check，We must judge carefully and carefully，Determine the exact location of the fault。The gap between the outer ring of the shaft end and the two sealing covers is too large，Find the front and rear ends of the bearing outer ring and seal
2015-04-17 Reading quantity 1557
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。]The service life depends on the quality of the product itself，There are other important factors。I just want to mention it，Welcome to add comments from experts！ one，Bearing selection stage，There are many factors to consider（case：load，hardness，Operating environment），Good bearing arrangement
2015-04-17 Reading quantity 1466
introduction：The quantitative analysis and evaluation of the economic effects of technical activities，Also known as techno-economic argument。Its modern management(See management engineering)One of the important means。Technical economic analysis to technical planning、Technical scheme、The expected economic effect of technical measures is analyzed、compute、Comparison and evaluation，Thus selected as technologically advanced、Economically sound optimal solution；Or for the type of product already in production，According to the market demand and trend, the expected economic effect of the change plan such as updating technology and production organization form is studied，As a basis for business management decisions。In the machinery industry，Technical and economic analysis is mainly used：①Major industry technology
2015-04-17 Reading quantity 2875
introduction：1The output shaft diameter of the bench reducer is80 mm，The material is conditioned45Gauge steel。Due to illegal operation during construction，The shaft was fractured as shown in the attached figure。We use an on-site restoration process，The shaft was repaired。 On account of45No. Steel carbon equivalent is large，The tendency of hardening in the heat affected zone is greater during welding，Easy to produce cold cracks，And the shaft welding amount is large，Inevitably, there are large welding deformation and welding stress。To reduce welding deformation，Improve weld quality，Take preheating measures before welding，The parts are then subjected to corresponding heat treatment before machining，To slow down the cooling，
2015-04-17 Reading quantity 2867
introduction： The accurate and reliable assembly of the mold mainly includes the preparation and method of controlling the following steps： ◆Application of anti-rust agent ◆OThe installation of the sealing ring ◆Installation of cavity die in template ◆Template installation including cavity mold ◆Processing sequence ◆assemble It takes patience to install and assemble tight tolerances、Steady gesture、Attention to detail and the ability to detect resistance。The maintenance phase of mold cleaning and troubleshooting costs are required15to20hours，Even more，The huge cost of time and money often lies in
2015-04-17 Reading quantity 2812
introduction：cegongqi ergograph dynamometer 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，But because of the friction coefficient instability and other shortcomings
2015-04-17 Reading quantity 2799
introduction：huadong shiyou xueyuan East China Petroleum Institute East China Petroleum Institute One of the national key universities。It was formerly known as Beijing Petroleum Institute，1953Founded on the basis of the Department of Petroleum, Tsinghua University，It is the first petroleum university in China。It started with oil drilling、Petroleum refining、Petroleum machinery 3Individual system,7major,Have a teacher212people。to1966Years of development as a professional14a，Teacher713people，Pupil5000multi-person5Petroleum colleges。1969
2015-04-17 Reading quantity 2810
introduction：Why does stainless steel rust?When the stainless steel pipe surface appears brown rust spots（point）when，People were amazed：consider“Stainless steel does not rust，Rust is not stainless steel，Maybe theres something wrong with the steel”。In fact，This is a one-sided wrong view of the lack of understanding of stainless steel。Stainless steel will rust under certain conditions。 Stainless steel has the ability to resist atmospheric oxidation---That is, rust proof，meanwhile
2015-04-17 Reading quantity 1539
introduction：The role of preload preload，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。]Before loading，By changing the relative positions of the inner and outer rings，Method of using a bearing in a backlash。Bearings for household appliances，The main function of preloading is to improve the bearing stiffness，Vibration noise suppression。 Influence of preload on bearing noise Bearing bearing diameter
2015-04-17 Reading quantity 1443
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