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introduction：1.Current status and existing problems of metal heat treatment technology Heat treatment technology is the main component of mechanical manufacturing technology，Its a reinforced metal material、Important technological measures to realize its potential，It is a key factor to ensure and improve the quality and life of mechanical products。Through proper heat treatment，Maximize the potential of the material，Ensure the mechanical properties required by the product、Process performance。At present, Chinas mechanical industry heat treatment plant、Point coreduction10 500a，Total number of employees near15Thousands of people，Heating equipment convention11Ten thousand units，Heat-treated steel parts700Tons of，Casting heat treatment300Tons of，Annual output value50Hundred million yuan，Annual power consumption
2014-12-21 Reading quantity 1526
introduction：1、sensationallyINAImported 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。]Quality In the process of selling bearings, I found that many customers said that as long as the surface of the bearing is bright, the quality is good，This is wrong。The light of the bearing surface should be a kind of dark light，The reason for this dark light is whether the steel used in the bearing is up to the standard and its grinding process and the cutting fluid used，The first two are the main ones。 2、pour
2014-12-21 Reading quantity 1577
introduction： Measurement of the microgeometric characteristics of the machined surface of a workpiece in length metrology。The commonly used measurement methods are comparative method﹑Stylus manipulation﹑Optical cutting method and interference method。 Comparative method Compare the surface roughness samples(Short sample﹐figure1 Roughness comparison sample )Compare with the measured surface based on sight and touch﹐Determine the measured surface roughness equivalent to the value﹐Or measure its reflected light intensity change to assess the surface roughness(See laser length measurement technique)。A sample block is a set of metal blocks having a flat or cylindrical surface﹐Surface warp
2014-12-21 Reading quantity 2869
introduction： The influence of forging billet on oxide is great。therefore，The heating time cannot be extended arbitrarily，And should actively improve the heating equipment and heating methods。 The amount of oxide produced，Depends on steel grade、Furnace type and heating atmosphere。Remove the oxide on a press or hammer，The method of roughing the blank first can be adopted；And then after every blow or two，Remove the forging and blow off the oxide。This helps to reduce the wear effect of the oxide on the mold。 In addition，Hydraulic removal of the oxide、scraping、The steel wire brush is removed and the billet is used、Pre-forged groove to break up the oxide, etc，Can reduce mold wear。
2014-12-21 Reading quantity 2824
introduction：1 Test materials and methods The raw material is produced by Xingcheng Special SteelGCr15SKFbearing[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]steel。 Process route：100t EBTElectric furnace smelting-LFrefine-VDVacuum treatment-CCM300Billet warm delivery
2014-12-21 Reading quantity 1553
introduction： At present，The study of sheet metal is generally a layout、bend、Stamping and forming，There are few studies on sheet metal cost estimation。Traditional sheet metal costs are estimated on an empirical basis，And generally just focus on the cost of production。This paper presents a cost estimation method based on the whole life cycle，Artificial neural network is introduced to adjust the cost estimation results，Bring it closer to the actual cost。In this way，Get a reasonable quote quickly，Extend cost estimates to the full life cycle，It expands the avenues for profit。 one、 introduction Sheet metal because of its beautiful appearance、Light and handy、Easy processing、Low cost
2014-12-21 Reading quantity 2816
introduction：Fluid dynamics studies the flow of viscous incompressible fluids around objects、Tube flow and jet flow branch。Viscous fluids can flow in two different states：Laminar flow and turbulence。Nawi－Stokes equation is the basic equation of viscous fluid dynamics。For turbulent flow，The statistical average method is applied from this equation，We get Reynoldss equation。The dimensionless parameter that takes into account the effect of viscosity is the Reynolds number。When the Reynolds number is large，The boundary layer theory is commonly used to deal with it。The phenomenon of viscous incompressible fluid bypassing an undesirable object can be described by Karman vortex street。 Liu Mingjie
2014-12-21 Reading quantity 2805
introduction：Analyze that，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 quenching cracking of steel ball is closely related to forging and heat treatment process。Improper forging heating time or temperature control，Causing the ball to overheat or overburn，So the grain is coarse，Workpiece toughness decline。On the other hand，In the west120mmThe center part of the steel ball has small forging deformation，The cooling rate is also less，
2014-12-21 Reading quantity 1460
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。]The main fault diagnosis technology is vibration diagnosis technology、Ferrography diagnostic technique、Temperature diagnostic technique、Acoustic diagnostic technique、Oil film resistance diagnostic technology and optical fiber monitoring diagnostic technology，among，Vibration、Iron shop、Temperature diagnostic technology is the most common application。 1.vibroscopy
2014-12-21 Reading quantity 1427
introduction：When determining the edge and margin，It should be based on the following principles： 1、The more complex the shape of the workpiece，The smaller the radius of the rounded corner，The value of lap edge and margin should be larger。 2、The larger the overall size of the workpiece，Its edge and edge distance should be increased with this。 3、The thicker the material，The value of the edge and the margin should also be larger。 4、The higher the mechanical strength and hardness of the material，Then the value of lap edge and margin can be reduced appropriately，When the plastic material is better，The value of the lap edge and the margin can be appropriately increased。 5、Feed and stop the material in a way that ensures accuracy，You can leave only a small width of the edge，Otherwise, it must be increased。 6、When using steel
2014-12-21 Reading quantity 2811
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