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introduction：known:Motor speedn1=1440r/min，Input powerP=15kw，Gear ratioi=2.8。 one、Calculation of gears In judgment，Decided to use the soft tooth surface drive，Pinion adoption45No. Steel tempered，Average hardness of tooth surface240HBS；Major tooth Cycle operation45No. Steel normalizing，Average hardness of tooth surface200HBS。 Calculation and description Main result 1、 Design according to tooth surface contact fatigue strength (1) Allowable contact stress δHlim=0.87HBS+380(table3-4) Safety factor take Allowable joint
2015-03-21 Reading quantity 2798
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 disassembly should be carried out as carefully as the installation。Be careful not to damageTIMKENBearings and parts，Especially the removal of interference fit bearings，Difficult to operate。therefore，Ease of disassembly should be taken into account in the design phase，It is also very important to design and make disassembly tools according to the needs。Taking down
2015-03-21 Reading quantity 1532
introduction：QC quality control Quality control personnel FQC final quality control Terminal quality control personnel IPQC in process quality control Quality control personnel in the process OQC output quality control Final shipment quality control personnel IQC incoming quality control Incoming quality control personnel TQC total
2015-03-21 Reading quantity 2890
introduction：Plate spring A spring composed of a single sheet of steel or multiple sheets of steel。Because of the friction between the plate and the plate, the plate spring has a large cushioning and damping capacity﹐Widely used in automobiles﹑In the suspension of tractors and rolling stock(See picture Various plate springs )。Commonly used plate springs have a semi-oval shape﹑Oval and quarter oval, etc。Semi-oval plate springs are commonly used in automobiles and rolling stock。Quarter oval plate springs are used for other mechanical equipment。Plate springs with fewer plates are mainly used in passenger cars。Plate springs made of sheet steel or other metal plates are also called sheet springs﹐It is often used to play a pressing role in instruments。
2015-03-21 Reading quantity 2790
introduction： Technical summary in recent developmentIKObearing[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。]biplanar，They are fitted with appropriate sealing devices。Its function，On the one hand, maintainIKObearing[IKObearing:IKONeedle roller bearing with its special internal structure to achieve the mechanical design of small、Light weight。Rail bearing given by needle roller bearing
2015-03-21 Reading quantity 1460
introduction：1）Determination of manufacturing process method Casting mechanism and casting process analysis，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 used for clamping bearing，Thus, it supports the shaft and the parts on the shaft， The weight of the cast part is about10Kgaround Part material isHT200 Profile dimension （215X
2015-03-21 Reading quantity 1455
introduction：On saleSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]In the process of，Encountered a lot of customer consultation such a problem，The bearings sold are not of Swedish origin。Actually SwedenSKFbearing[SKFbearing:SKFThe full name is“Svenska
2015-03-21 Reading quantity 1473
introduction：1Machining deep step holes Machining deep step holes with empty tool holes as shown in the attached drawings on the horizontal machining centerØDwhen，The empty hole part of the tool is fast feed，But as shown in the picturebAs shown on the complex casting，The position and size of the empty hole may be deviated，Therefore, the hole wall of the empty tool hole may interfere with the fast feed tool，It will also cause damage to the boring tool tip，When it is serious, it will cause the knife to hit because the knife is one-sided。If youre using a reamer，In the process of stranding, it is inevitable that the cutting edge part of the reamer will interfere with the hole wall of the empty tool and cause the cutting tool to break，The processing of deep step holes cannot guarantee the process of holes
2015-03-21 Reading quantity 2791
introduction： Many large forgings requiring high mechanical properties and surface hardness，It must be roughed after forging，Then tempering heat treatment or surface quenching。In heat treatment，Due to the rapid change in temperature，There will be a lot of temperature stress。Structural stress is also generated due to the phase change，And the residual stress in the forging，The resultant tensile stress value exceeds the tensile strength of the material，And there is no plastic deformation relaxation，Various forms of cracking and cracking will occur。Such as vertical、Landscape orientation、Surface and central cracks，Surface cracking and surface peeling。 Due to large forging section size，heat、The temperature distribution is not uniform during cooling，
2015-03-21 Reading quantity 2892
introduction：A power station turbine that uses the steam generated by the heat generated by the fission of atomic nuclei as its working medium（See nuclear power plant）。There are different types and requirements of steam turbine in nuclear power plant according to the different types of nuclear reactor。In a pressurized water reactor、Boiling-water reactor、In nuclear power plants such as heavy water reactors and gas cooled reactors，The admission pressure is usually used5～7Megapascal saturated steam turbine。Except for boiling water nuclear power plants，The working medium steam of the saturated steam turbine in other nuclear power plants does not come into direct contact with the nuclear reactor，Basically no radioactive contamination，Steam turbine operators do not need special protection。Improved gas-cooled reactors and some new reactors（Such as molten salt breeder reactor、fast
2015-03-21 Reading quantity 2885
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