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A quenching crack is a crack that occurs during the quenching process or during placement at room temperature after quenching。The latter is also called aging crack。There are many reasons for quenching cracking，When analyzing quench cracks，It should be distinguished according to the crack characteristics。 one、Characteristics of quenching cracks During the quenching process，When the huge stress generated by quenching is greater than the strength of the material itself，This can lead to cracks。The quenching crack often occurs shortly after the martensitic transition has begun，The distribution of cracks is not regular，But it is generally easy to notch on the edges of the workpiece、Abrupt cross section formation。
Mold manufacturing is a production cycle with urgent requirements，Complex production process with high technical requirements。In order to greatly shorten the product production cycle，Improve the quality of products，manufacturing-orientedCAD/CAMSoftware has become one of the core and key technologies in todays mold manufacturing。IsraelCimatronSoftware Co., Ltd. as the world famousCAD/CAMSoftware vendors have been working to provide advanced technology for the manufacturing industryCAD/CAMSystem，CimatronIs an integratedCAD/CAMproduct，In a unified system environment，Use a unified database，User can complete
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。]Packing includes inner packing and outer packing。 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，To reduce
inKOYOBearing during use，It can be said that vibration and temperature on cylindrical roller bearings[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 impact is very large，Lets look at the bearings first[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is the part that fixes and reduces the friction coefficient of load in the process of mechanical transmission
Imported bearings in use[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。]Should pay attention to the main precautions are4aspect，In order to make the bearing work better，The following Yiyi detailed introduction。 1、Selection and control of shaft and bearing tolerances After the bearing is pressed into the bearing, it should rotate flexibly without blocking。If there is obvious rotation is not flexible，It means that the size of the shaft is too large，Tolerance to be reduced。If the bearing is pressed into the shaft, the hand rotation is obvious“Shasha
SKFImported 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。]Installation is good or not，It will affect the accuracy of the bearing、Life and performance。therefore，Please fully study the installation of bearings，Please follow the operating standards including the following itemsSKFImported 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，f
Working principle of reducer Detailed content: In a nutshell,It is the use of all levels of gear transmission to achieve the purpose of reducing speed.The reducer is composed of gear pairs at all levels.For example, using small gears to drive large gears can achieve a certain goal of deceleration,Then adopt the multi-level structure,You can significantly reduce the RPM. The reducer is generally used for transmission equipment with low speed and high torque，Knob motor.The power of an internal combustion engine or other high-speed operation is decelerated by meshing large gears on the output shaft with fewer teeth on the input shaft of the reducer，The ordinary reducer will also have several pairs of the same principle gear to achieve the ideal speed reduction effect
Double row deep groove ball bearings[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。]Radial clearance means that a ferrule is fixed，The other ring is perpendicular to the double row deep groove ball 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
Make sure the car starts smoothly This is the primary function of the clutch。Before the car started，Naturally, you start the engine first。And when the car starts，The car accelerated gradually from a complete standstill。If drive train（It connects the whole car）Rigidly connected to the engine，Once the transmission is in gear，The car will make a sudden leap forward，But it doesnt get started。This is because the car goes from standstill to forward thrust，It has a lot of inertia，It creates a large drag moment on the engine。Under this inertial resistance moment，The engine speed drops sharply to the lowest stable speed in an instant（normal300-500RPM）
Automobile covering is one of the most important components of automobile products，It is generally manufactured by stamping process through large molds。Body coverings require a smooth surface，No wrinkles allowed、scratch、Surface defects such as brushed hair，Adequate rigidity and dimensional stability are required。These are closely related to the mechanics of the plate and shell in the process of processing，The mechanical problems in the forming process are very complicated，Only by using numerical techniques can the problem be simplified。 At present, the forming process of automobile covering parts mainly relies on the traditional experience design to develop the stamping process、Develop related molds，Has considerable randomness
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