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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 2778
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 2879
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 2871
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 1442
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 2783
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 1530
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 2855
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 1434
introduction：Absolute sincerityMESBarcode production execution system electronic assembly industry solutions author:Mr. Bai is from:Sincere software（EASSoftware） With the deepening of global economic integration，China is a big manufacturing country，In electronics assembly、SMTpatch、PCBGreat breakthroughs have been made in areas such as assembly，The size and number of enterprises continue to increase，Increased cost pressure、Product life cycle is shortened、Equipment is increasingly complex with a lack of transparency and unclear demand forecasts，These have become an important factor in the competition of electronic manufacturing industry in the world today。
2015-04-01 Reading quantity 2773
introduction：While the institution is operating，InstallFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The parts are allowed to have a certain temperature，When touching the body shell with the hand，It should be normal not to feel hot，Otherwise, the temperature of the tapered roller bearing is too high。 The reasons for the high bearing temperature are：Lubricating oil quality does not meet the requirements or deterioration，Excessive lubricating oil viscosity；The mechanism assembly is too tight(Lack of clearance)；Tapered roller bearing assembly too tight；The bearing ring rotates on the shaft or in the housing；overload；FAGbearing
2015-04-01 Reading quantity 1537
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