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introduction： 1GB/T780-1979Gasoline engine carburetor outlet flange dimensionsCarburetersforautomobileengines--Dimensionsofoutletflanges2GB/T983-1995Stainless steel electrodeStai
2015-04-01 Reading quantity 2875
introduction：The conveyor uses the steel wire rope set up in the air as the bearing part and the traction part,Used to transport materials or people。Aerial ropeway is widely used,It is characterized by:Strong adaptability to terrain、Good climbing ability；In addition to8Grade above high winds outside，General wind、The rain、snow、Foggy weather can work as usual；Small footprint，Hardly any farmland。 Circa BC250years,People living in the mountainous areas of southwest China began to erect bamboo or rope to cross rivers“Ze”,It can be regarded as the prototype of modern aerial ropeway。The first recorded freight ropeway in Europe was1644Transporting sand and stone during the construction of Danze fortress
2015-04-01 Reading quantity 2784
introduction：Forklift drivers need to know 1、When lifting heavy objects should be tied smoothly and firmly，Do not stack or hang loose objects on heavy objects。Scattered objects or articles must be tied firmly with a hanging cage or wire rope before lifting。The Angle between the rope and the object must not be less than30The degree of。 2、There should be enough working space for tower crane operation，There are no obstacles within the lifting and turning radius of the boom，Adequate lighting should be provided for night work。 3、The amplitude indicator of the tower crane、Safety protection devices such as torque limiter and various travel limit switches must be complete and complete、Be sensitive to
2015-04-01 Reading quantity 2779
introduction： 1．backdrop Many complex parts in the automotive industry are directly produced by investment casting，How to be high precision、The rate of、It is an important problem in the automotive industry to manufacture the master forms of these precision castings at low cost。Hand-made by traditional wood modelers，For the surface shape complex master die，Not only inefficient、Low accuracy，It is difficult to meet the production needs。Manufactured by CNC machining center，The cost is too high。therefore，Beijing Yinhua Laser Rapid Forming and Mold Technology Co., Ltd. cooperated with Jiangsu Huaneng Fine Foundry in Changzhou，The melt deposition manufacturing process in rapid prototyping technology is adopted——MEM
2015-04-01 Reading quantity 2880
introduction：three、grinding Surface grinding is the same as other surface grinding，High cutting speed、The feed is small、The dimensional accuracy is easy to control and a small surface roughness value can be obtained，Machining accuracy is generally up toIT7~IT5level，The surface roughness value can be reachedRa1.6~0.2μm。The quality of surface grinding is higher than that of planing and milling，It can also process hardened parts，Therefore, it is used for semi-finishing and finishing of parts。When the production batch is large，The surface of the box is often ground to finish。 In the surface grinding with high rigidity of the process system，recoverable
2015-04-01 Reading quantity 2872
introduction：Clearance isTIMKENKnuckle 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。]An important factor in whether it works properly。Select the rightTIMKENJoint bearing clearance，The load can be distributed reasonably among the rolling elements；Energy limiting axis（Or shell）The axial and radial displacement of the axis to ensure the rotation accuracy of the shaft；makeTIMKEN
2015-04-01 Reading quantity 1443
introduction： Raw rubber can be divided into natural rubber and synthetic rubber two categories: 1.Natural rubber:Cut mouth from rubber trunk，Collect the spilled rubber，Through deimpurity、solidification、smudging、Drying and other processing procedures，And form raw rubber material。 2.Synthetic rubber:A byproduct of the petrochemical industry，According to different needs，Synthetic rubber materials with different physical properties。Commonly used as:SBR、NBR、EPDM、BR、IIR、CR、Q、FKMEtc.。However, due to the difference in the synthesis method，The same kind of rubber can be separated from several different kinds of raw rubber，Its also formulated
2015-04-01 Reading quantity 2784
introduction：1.Nominal inside diameter（Outside diameter）noninalborediameter(outsidediameter) Envelope basic cylindrical bore（Cylindrical outer surface）The diameter of the cylinder on the theoretical surface。In a specified radial plane，The diameter of the cone on the theoretical surface of the enveloping cone hole。The spherical diameter of the theoretical surface enclosing the basic spherical surface。 note：For rolling bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）Is in machinery
2015-04-01 Reading quantity 1531
introduction：Under certain flow conditions，Part of the kinetic energy of the fluid is converted into fluid vibration，Its vibration frequency and velocity（Flow rate）There is a definite proportional relationship，The flow meter based on this principle is called the fluid vibration flow meter。At present, there are three types of fluid vibration flowmeters：Vortex flowmeter、precession（Vortex precession）Flowmeters and fluidic flowmeters。Fluid vibration flowmeters have the following features： 1）The output is the pulse frequency，Its frequency is proportional to the actual volume flow of the measured flow body，It is not subject to fluid components、density、stress、Effect of temperature； 2）Wide measuring range，Generally, the range can be reached10：1above； 3）
2015-04-01 Reading quantity 2856
introduction：1、Longitudinal crack——Crack characteristics and forming conditions：Occurs in hardened parts、In the raw material, the carbide band and the severe segregation of the structure or the longitudinal extension of the non-inclusion，Split inward from the surface，The cracks were deep and long。 Solution and preventive measures：Eliminate carbide bands and segregation structures in raw materials，Strictly prohibit excessive impurities；Reasonable formulation of heat treatment process parameters；Try to exclude human operation factors。 2、Profiled crack——Characteristics and forming conditions of quenching crack：It often occurs in unquenched parts or carburized parts，Most of the cracks are located in the sharp corners of the parts and the difference in thickness。 Solution and preventive measures：The key is to make reasonable heat treatment workers
2015-04-01 Reading quantity 1435
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