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introduction： Uneven distribution of chemical composition and impurities in steel，segregation。Generally will be higher than the average composition，This is called positive segregation，Below average composition，Its called negative segregation。There is macroscopic segregation，Such as regional segregation and micro segregation，Like dendrite segregation，Segregation between crystals。 Segregation in heavy forgings is closely related to ingot segregation，The degree of segregation of the ingot depends on the steel grade、Ingot mould、Smelting quality and pouring conditions are related。Alloying element、Impurity content、Gases in steel all increase the development of segregation。The bigger the ingot，The higher the pouring temperature，The faster the pouring speed，The more severe the segregation degree。 (1)
2015-02-16 Reading quantity 2882
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 specific judgment method of whether repair should be reported，namelyTIMKENBearing has been fully used and the specific judgment method of near failure is as follows： 1)Use the bearing working condition monitoring instrument Using a ferrograph orSPMorI-ID—1Bearing working condition monitoring instrument
2015-02-16 Reading quantity 1453
introduction： 1.Working medium and working conditions In specific selectionORing material when，First of all, consider the compatibility with the working medium。The pressure at the seal must also be finally taken into account、temperature、Continuous working time、Operating conditions such as operating cycle。If used in a rotating situation，Temperature rise due to friction heat must be considered。Different seal materials，Its physical and chemical properties are different，see《Rubber seal material characteristics table》。 2.Seal form According to the type of load can be divided into static seal and dynamic seal；According to sealing purposes can be divided into hole seals、The shaft is sealed with a seal and a rotating shaft；According to its installation form can be divided into radial installation
2015-02-16 Reading quantity 1524
introduction：What to consider when buying a forklift truck When buying a hand lift truck，Consider whether manual or electric forklifts are easy to maintain。All parts should be easily replaced，Diagnosis and elimination of faults should be quick。High quality manual or electric forklifts have modular control systems，Can be directly connected to the laptop，Use diagnostics to quickly find faults or modify parameter Settings（Such as travelling speed）。 Look around the electric stacker for any oil or water leaks；Check whether the tire pressure of the electric stacker is normal，Whether the tread is cut，Whether the steel ring is deformed，injure，screw
2015-02-16 Reading quantity 2896
introduction： There are several brands of dry film currently in use，Different brands have slightly different parameters when applying film，The parameters of different batches of dry film are also slightly different，The specific parameters should be communicated with the manufacturer and adjusted according to the situation of their own equipment。 When the dry film is applied，First, peel the polyethylene protective film from the dry film，Then the dry film resist is pasted on the copper-covered foil plate under heating and pressurization。The resist layer in the dry film softens when heated，Increased liquidity，By means of the pressure of the hot press roller and the adhesive in the resist The action of the agent completes the coating。Laminating is usually done on a laminating machine，There are many types of film models，danradical
2015-02-16 Reading quantity 2830
introduction： Application of reverse engineering technology in automobile body design Reverse engineering in the field of automobile manufacturing，The specific performance is the reference design of existing auto parts，Construct geometric models of objects by measuring them，Then according to the specific function of the object to improve the design、Manufacturing and quality inspection。Reverse engineering technology is widely used in automobiles、aviation、Mold and many other fields。Stuttgart School of Engineering in Germany to detect the cooling channel of the cylinder block，Recycle industry CT with RP Technology integration into new product development。First of all, the cylinder block CT Detection，gainCT Image and point cloud data，multilateral
2015-02-16 Reading quantity 2803
introduction：Universal joint 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 failure accounts for a large proportion of motor failures. The loss caused by bearing damage is quite serious，A running electric motor produces all kinds of sounds and vibrations，If you find a cracking sound、Sliding sound、Metallic sound，The temperature increases obviously，It is compared with the usual operation when there is a difference，
2015-02-16 Reading quantity 1509
introduction： The inkjet system consists of two parts，Control system and air ink route system。 Control system A mainframe composed of computer control systems，Mainly includeＣＰＵCentral processing unit、ＥＰＲＯＭmemorizer、Keyboard、Programmer etc。The product movement signal is received by the photoelectric sensor、Control micro-solenoid valve type nozzle，Non-contact printing of the product，There are two ways of gas supply and self-supply，The gas path of the external gas supply is composed of the gas source——inkwell——sprayer；The gas path of self-supply gas is made of ink bucket——Miniature water pump——Nozzle formation。Different products of its gas ink route system
2015-02-16 Reading quantity 2809
introduction：In useNSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]In the process of，Grease is very critical。if，Stale grease was used，Not only is it ineffective，while
2015-02-16 Reading quantity 1500
introduction：After a period of exercise，Vibration and noise maintain a certain level，Very homogeneous spectrum，Only one、Double frequency。Frequency spectrum above triple power frequency rarely occurs，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。]Very stable，Enter the stable working period。 Continue to run and enter the late use，The vibration and noise of automobile hub bearing began to increase
2015-02-16 Reading quantity 1575
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