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introduction：(1)General requirements for cage materials 1)It has low hardness and high wear resistance，Although the hardness of the material is higher wear resistance，However, if a high hardness material is used as a cage，Will wear the rolling element，The rotation performance is adversely affected，Even produce“Convergent phenomenon”。 2)Because the cage is subjected to repeated tensile and compressive stresses，Therefore, it requires a high fatigue strength；Have the necessary elasticity and toughness；Resistance to centrifugal force。 3)Cage light weight，Use less dense materials，So thatKOYOBearing friction loss is small，It can ease the impact of rolling element entering and leaving load zone。 4)Plastic machining and cutting
2014-12-31 Reading quantity 1439
introduction： To measure the resistance of material under shear force﹐It is one of the basic test methods for mechanical properties test of materials。It is mainly used to test parts and materials subjected to shear loads﹐Such as rivets on boilers and Bridges﹑Pins on the machine, etc。The shear test was carried out on a universal test machine﹐The sample is placed on the shear fixture﹐There are two kinds of loading modes: single shear and double shear(See picture Shear test loading diagram )﹐Sample under shear loadP The action is cut off。Simple shear time﹐P Divided by the cross-sectional area of the specimenA ﹐Derived shear
2014-12-31 Reading quantity 2778
introduction： Edm and NC milling have their own advantages，The selection of their application in mold processing should be comprehensively considered from the aspects of product structure and operator，This article provides the experience of a mold processing equipment in the United States，It also has reference significance for Chinese manufacturers。 In many mold manufacturers，For random EDM（EDM）And computer digital control（CNC）Milling options are much less clear than in the past。To change technology is to change the norm。 E.g. milling，It can now be used more widely than before。High feed speed、Tool path
2014-12-31 Reading quantity 2782
introduction： Simple diagnosis，That is, in vibration detection, the size of some vibration parameters is generally tested，And standard value（Threshold value）Compare to judge imported bearings[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 state of，Imported bearings on locomotives[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，Quality
2014-12-31 Reading quantity 1448
introduction： General concept Roughing Roughing is to quickly cut the blank margin for the purpose，When roughing, large feed and as large cutting depth as possible should be selected，In order to remove as many chips as possible in a short period of time。Roughing does not require high surface quality，The blunt standard of a tool is generally a significant increase in cutting force，That is, the wear width of the tool faceVBAs a standard。 Finishing The most important consideration in finishing is the workpiece table
2014-12-31 Reading quantity 2794
introduction： Processing technology of shaft parts： one、The function of shaft parts、Structural characteristics and technical requirements Transmit torque and bear load。Shaft parts are rotating parts，Shaft parts are one of the typical parts often encountered in the machine。Mainly used to support transmission parts。Its length is greater than its diameter，Generally by the concentric axis of the outer cylinder、Conical surface、Composed of an inner hole and a thread and a corresponding end face。Depending on the shape of the structure，Shaft parts can be divided into optical shafts、Stepped shaft、Hollow shaft and crankshaft, etc。 Greater than 20 Slender axis，The length to diameter ratio of the shaft is less than 5 short
2014-12-31 Reading quantity 1709
introduction：The first thing to emphasize is this，Holding 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。]Lubrication and cleanliness are important。So when we check the light ocean bearing before,The bearing surface should be cleaned first，Then remove the parts around the bearing。Attention, everybody.，Oil seals are fragile parts，This requires extra care during inspection and disassembly，
2014-12-31 Reading quantity 1500
introduction：jianzhu qiye shengchan nengli Production capacity of construction enterprises capacity of construction enterprise The maximum capacity that an enterprise can complete the output of building products in one year。It is a comprehensive calculation of the production capacity of each production unit within the enterprise，Generally expressed in physical units or monetary units。Calculate the production capacity of construction enterprises and study its change and utilization degree，Is to balance the construction force、Tap the potential of enterprises、The basis for making business plans。In the implementation of the tender contract system，
2014-12-31 Reading quantity 2791
introduction： Imported 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 disassembly should be carried out as carefully as the installation。Be careful not to damage imported bearings[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。]And parts，Especially interference fit imported bearings[Imported bearing
2014-12-31 Reading quantity 1475
introduction： Precautions for electric forklift at low temperature 1、Do not make sharp turns when the forklift is running、Quick braking。Snow and ice weather when driving on the ramp or field work，To take bedding ash、Anti-slip measures such as grass flakes。 2、When it first started，Insufficient lubricating film between moving parts，After starting, semi-liquid friction or even dry friction will be generated。Also due to the low temperature，The liquid inside the battery is viscous，At the same time, the lubricating oil on the cylinder wall is diluted，Reduce the lubrication efficiency of lubricating oil，Aggravate the wear of engine parts，Cropped hair
2014-12-31 Reading quantity 2800
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