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introduction：Unit holding force during deep drawing on a single acting press material material q/MPa aluminum 0.8～1.2 Red copper,duralumin(Annealed or freshly quenched) 1.2～1.8
2015-02-07 Reading quantity 2807
introduction：According to the use of parts and use conditions and environmental conditions to select the size、precision，Fitted with suitable railway 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。]It is the premise of ensuring bearing life and reliability。 Site of use：IKObearing[IKObearing:IKONeedle roller bearing with its special internal structure to achieve the mechanical design of small、
2015-02-07 Reading quantity 1547
introduction： Hydraulic control clutch。 Hydraulic control clutch slip，Most are due to the clutch pedal free travel is not enough，Thus forming separate 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。]Press against a disengaging lever or diaphragm to rotate accordingly。The best way is to adjust the return position of the clutch pedal，and
2015-02-07 Reading quantity 2818
introduction：Impregnation process Glass cloth or other substrates are impregnated with epoxy glue through the rubber tank of a vertical or horizontal impregnation machine，It is then dried in the oven、prepolymerization、Wrap up to get epoxy tape。 (1)Impregnation of glass cloth。The basic requirement for impregnation of glass cloth is that the glass cloth must be fully impregnated with resin，The adhesive layer is uniform and has a certain amount of glue。This is an important factor for the quality of laminated plastics。In order to ensure the quality requirements of the tape and easy impregnation operation，The main factors usually controlled are the viscosity of the glue and the impregnation time。In addition to the glass cloth traction tension and glue control device(Such as the gap of the extrusion roller)Also make appropriate adjustments
2015-02-07 Reading quantity 2911
introduction： The prefabricated hole on the workpiece is enlarged to a certain size with a rotating single-edge boring tool﹐To achieve the required precision and surface roughness of the cutting processing。Boring is generally done in a boring machine﹑Machining centers and combined machine tools are carried out﹐Mainly used for processing boxes﹑Cylindrical holes in workpieces such as supports and frames(See picture Diagram for boring cylindrical holes )﹑Threaded hole﹑Hole inside groove and end face﹔When using special accessories﹐The inner and outer spheres can also be processed﹑taper。The boring accuracy of steel materials is generally up toIT9～7﹐Surface roughness isR
2015-02-07 Reading quantity 2790
introduction：1 Process route laying-off→Forging blank→Isothermal spheroidizing annealing→Turning process→Rough grinding→quench→temper→Fine grinding→Stabilization treatment（Additional tempering）→Fine the surface of the workpiece→inspect→Finished product→cleanse→rust-proof。 2Preliminary heat treatment GCr15Spheroidizing annealing is used for pre-heat treatment of steel，Objective To change the tissue into fine granular pearlite with uniform distribution，Obtain the best machinability and provide a good original structure for quenching，quench、The best mechanical properties are obtained after tempering。GCr15The annealing structure of the steel is uniform fine grain pearlite。 3Turning process 3.1Rough turning The root
2015-02-07 Reading quantity 1561
introduction：In planar linkage, friction and inertia of members are ignored，The Angle between the direction line of the driving force on the follower and the speed direction line of the point at which the force is applied when the mechanism is moving。In the crank rocker mechanism(figure1[Crank and rocker mechanism pressure Angle]),The force acting on the rocker by the active member through the connecting rodPAlong theBCdirection,Point of force operationC The direction of velocity is verticalCD，The Angle between these two directions Pressure Angle。Greater pressure Angle，PThe smaller the effective component of work that can be done in the direction，The harder it is to drive。The rest of the pressure Angle Drive Angle。The pressure Angle or transmission Angle of the mechanism is one of the dynamic indexes to evaluate the mechanism
2015-02-07 Reading quantity 2806
introduction：As everyone knows，A machine usually consists of three basic parts:Immediate engine、Reducer device and working mechanism。In addition，According to the needs of the machine，Possibly incline control and lubrication、Lighting and other auxiliary systems。The mechanical reducer device refers to the intermediate device that transmits the mechanical energy generated by the power machine to the working mechanism in a mechanical way。The mechanical reducer device can respectively play the following roles: 1)Change the output speed of the engine(retard、Speed up or speed change)，To suit the work needs of the working organization; 2)Change the torque of the engine output，To meet the requirements of the working organization;
2015-02-07 Reading quantity 2800
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。]Five principles of normal work： 1、Minimum oil film thickness criteria 2、Criteria for ensuring minimum installed interference of bearing inner rings 3、Maximum mechanical load and impact load criteria 4、Maximum heat load(Absolute humidity、temperature)criterion
2015-02-07 Reading quantity 1569
introduction：1、Technological principle （1）Phase transition characteristics of metals in vacuum state。 Only difference in atmospheric pressure0.1MPaRange under vacuum，Solid-state transformation thermodynamics、What does the dynamics not change。In the formulation of vacuum heat treatment process regulations，It can be completely based on the principle of solid phase transformation under atmospheric pressure。It can refer to the data of various types of tissue transformation under normal pressure。 （2）Vacuum degassing，Improve the physical and mechanical properties of metal materials。 （3）Vacuum degreasing。 （4）Evaporation of metals：Heating under vacuum，The surface elements of the workpiece will evaporate。
2015-02-07 Reading quantity 1547
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