introduction:For the body main 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。]Measurement of hole coaxiality,It is necessary to measure the coaxiality size of the diesel engine body more accurately,At the same time, the runout of the crankshaft is measured,The thickness of the bearing is selected,Make the oil moistening gap in each axial position to achieve consistency。Where diesel engines have been rolled over、Drive-by, etc,The machine must be checked before assembly
2015-02-19 Reading quantity 1576
introduction:Organic coating The surface of the base material is coated with a material protection layer of organic material。In machine building﹐The vast majority of organic coatings are coating layers﹐Or paint layer。In addition﹐It is also coated with rubber or plastic。Need acid resistance﹑Alkali and steel parts resistant to corrosive gases and liquids﹐Normal thickness contract 3Millimeter rubber(Such as neoprene)Or plastic(Such as vinyl chloride copolymer)Stick to the surface﹐Can protect the matrix from corrosion for a long time。This coating is mainly used in large corrosion resistant vessels or exhaust systems。Metal components buried in the soil﹐It is often protected by polyethylene tape。Apply PTFE to a surface sprayed with molybdenum or stainless steel
2015-02-19 Reading quantity 2817
introduction: The width of the coil sleeve Outside diameterD breadthB 6~7 5,10 8~10 10,15
2015-02-19 Reading quantity 1456
introduction:Use it at workIKObearing[IKObearing:IKONeedle roller bearing with its special internal structure to achieve the mechanical design of small、Light weight。Guideway bearings are based on the high quality given by needle roller bearings,Precision machining with unique mechanical equipment,Evaluate the quality of the latest machines,Products always maintain high performance and high quality level。]Sound characteristics,Only in this way can we accurately determine whether there is an anomaly,When the rolling bearing is working,Normally, yes,Smooth running、brisk,non-stagnation,The sound occurs harmoniously and without noise,Can be heard evenly and continuously“uproar”The sound,perhaps
2015-02-19 Reading quantity 1615
introduction:Ground vehicle mechanics terrain vehicle mechanics bicycle bicycle Automotive mechanics mechanics of motor vehicle Automobile production production of motor vehicle Automobile train tractor-trailer combination Automobile safety safety of motor vehicle Automobile body automotive body
2015-02-19 Reading quantity 2914
introduction:G0、G1、G2、G3Is descriptive surface、The continuous manner of the curve,smoothness,It is generally used to judge the quality of surface when repairing surface。 G0——Dot continuity:Refers to the surface or curve point continuous。Curve without breakpoint,There is no crack at the surface contact。 Decision method:Continuous curve,But with horns;The surface has no holes or cracks,But there is a mistake.。 Mathematical interpretation:The intersection of a curve or any plane with the surface is continuous everywhere。 G1——Tangentially continuous:Refers to the surface or curve point continuous,And all the connected line segments、The surface pieces are all tangent to each other。 Decision method
2015-02-18 Reading quantity 2810
introduction:With the continuous improvement of injection molding processing accuracy requirements,In addition to the correct selection of materials and modification of the selected plastic,How to choose the correct molding process conditions,The relationship between the comprehensive shrinkage rate of the product and the parameters of the processing technology is analyzed reasonably,And the shrinkage rate of various reasons and processing factors on its influence is a very important subject。 1 Experimental part 1.1 Experimental material PP:1390type,Injection grade copolymerizationPP,Beijing Yanshan Petrochemical Company。 1.2 equipment Injection machine:SZ-100/160NB,Ningbo plastic machinery factory;
2015-02-18 Reading quantity 2875
introduction:1)Heat treatment equipment should be checked before heat treatment、Auxiliary equipment、Gauges, etc., are up to standard and normal,Whether the temperature difference between different parts of the furnace is within the specified range(±5℃); 2)Sand blowing or washing should be done before loading the furnace,Should be free of oil、filth、soil,Alloy grades should not be mixed; 3)Castings whose shape characteristics are prone to warping should be placed on special chassis or supports,Overhanging cantilever parts are not allowed; 4)The single casting or attached casting test rod for checking the performance of the casting should be treated with the parts in the same furnace,To truly reflect the performance of the casting; 5)Should be checked at any time during the heat preservation period、Calibrate the temperature throughout the furnace,Prevention bureau
2015-02-18 Reading quantity 1548
introduction:2-1.Ferritic steel Chromium greater than14%Low carbon chromium stainless steel,Chrome dry27%Any carbon content of chromium stainless steel,Molybdenum is added on the basis of the above components、titanium、niobium、silicon、aluminum、、tungsten、Vanadium and other elements of stainless steel,The elements that form ferrites dominate the chemical composition,The matrix structure is ferrin。This kind of steel is being quenched(Solid solution)The structure in this state is ferrite,A small amount of carbides and intermetallic compounds can be found in the annealed and aged tissues。 Those who fall into this category areCrl7、Cr17Mo2Ti、Cr25,Cr25Mo3Ti
2015-02-18 Reading quantity 1533
introduction: towardsNSKImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing,ikobearing,fagbearing,Of good quality,Of course, the price is not cheap。]The conditions required、Performance is also increasingly diverse。In order to be able to from a large number of structures、In size, Various mechanical devices using rolling bearings、The performance of instruments and other market requirements are becoming more stringent。Choose the best fitNSKImported bearing[Imported bearing:Simply put, imported bearing agent refers to engaging in a certain
2015-02-18 Reading quantity 1455