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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 chemical composition of steel is mainly carbon、chromium、silicon、manganese、nickel、molybdenum、Vanadium et al。 a Carbon effect Except for carburizing steel，General bearing steel carbon content in0.95—1.15%，It is a hypereutectoid component。This can be obtained after quenching and low temperature tempering
2015-03-23 Reading quantity 1513
introduction：The essence of shearing in orientation injection molding is to apply dynamic pressure to the melt through the gate，Vibratory shear flow is generated in the polymer melt in the mold cavity，Under its action, molecular chains or fibers in different melt layers produce orientation and freeze in the product，Thus controlling the internal structure and micro-morphology of the product，To achieve the purpose of controlling the mechanical properties and appearance quality of the product。There are two ways to introduce vibration into the mold cavity: screw and auxiliary device。 1）Screw vibration The working principle of screw vibration is to provide pulsating oil pressure to the injection cylinder，Make the injection screw produce reciprocating movement to achieve vibration，The vibration produced by the injection screw acts on
2015-03-23 Reading quantity 2807
introduction： CODE：00475 Device name：Multi-station automatic press Type specification：Nominal force≥4000kN Unit of measurement：Taiwan Main parameter content
2015-03-23 Reading quantity 2784
introduction： A plug body with a through hole is used as a valve for opening and closing parts。The plug body rotates with the stem﹐To achieve the opening and closing action。Small unpacked plug valves are also known as“Cock”。The plug body of the plug valve is mostly a cone(There are also cylinders)﹐The sealing pair is formed with the conical hole surface of the valve body。The plug valve is one of the earliest valves used﹐Simple structure﹑Quick switch﹑Low fluid resistance。Ordinary plug valves are sealed by direct contact between the machined metal plug body and the valve body﹐So the sealing is poor﹐Large opening and closing force﹐Easy to wear﹐Usually only used low(No higher than1mpa)And small caliber(Less than100millimeter)The occasion of。To expand the cock
2015-03-23 Reading quantity 2804
introduction：Butt 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。]Periodic inspection，It is very important to keep the bearings in the best condition，It can also reflect the discovery of problems。Matters and relevant knowledge that should be paid attention to in the use of bearings。 First of all，What we want to emphasize is this，holdKOYObearing[KOYObearing:kOYOshaft
2015-03-23 Reading quantity 1453
introduction： MastercamThe system is configured with a general post-processing for a single type of control system，This postprocessing provides a functional database model，Users according to the specific situation of CNC machine tools and CNC systems，Its database can be modified and compiled，Customize a special post-processing program for a CNC machine tool。 MastercamThe extension name of the system postprocessing filePST，callPSTdocument，It defines the cutting parameters、NCProgram format、Auxiliary process instruction，The interface function parameters are set，Its structure consists of eight parts： 1．annotation
2015-03-23 Reading quantity 2888
introduction： Austenitic and ferritic heat resistant stainless steel、superalloy、Aluminium alloy、Magnesium alloys etc during heating and cooling，A material without an isomeric transition，As well as some copper alloys and titanium alloys，The defects in the forging process can not be improved by heat treatment。 Materials that undergo an isomer transition during heating and cooling，Such as structural steel and martensitic stainless steel，Some defects in the structure caused by improper forging process or some defects left over from raw materials，It has great influence on the quality of forgings after heat treatment。Examples are given below： 1）Rough forge
2015-03-23 Reading quantity 1549
introduction：Using the radial movement of the movable jaw distributed on the chuck body，Machine tool accessories that clamp and position workpieces。Chucks generally consist of a chuck body、Movable gripper and gripper drive mechanism 3Partial composition。Chuck body diameter minimum65millimeter，Maximum accessibility1500millimeter，There is a central hole，In order to pass the workpiece or bar material；The back has a cylindrical or short conical structure，It is connected with the spindle end of the machine tool directly or through the flange。Chucks are usually mounted on lathes、Use on external and internal grinding machines，It can also be used with various indexing devices，Used on milling and drilling machines。 The power used by the chuck to drive the claw is different，Divided into manual chuck and
2015-03-23 Reading quantity 2773
introduction：Proper lubrication and maintenance can be playedKOYObearing[KOYObearing:kOYOBearings are generally required to bear large loads，Often without a cage，Instead, fill the inner and outer raceways with rolling elements。And most small and medium-sizedKOYORolling bearings are equipped with retainers。 inKOYOBearing in the processing process，The outer ring of the bearing、Inner ring、How do the roller and cage fit together。]Maximum service life。 1、Grease lubrication KOYObearing[KOYObearing:kOYOBearings are generally required to bear large loads，Often without a cage，But inside
2015-03-23 Reading quantity 1439
introduction： brand Amount toISOClass number sex can density (kg/m3) The bending strength is not less than (Mpa) Hardness not less than (HRA) YG3X
2015-03-23 Reading quantity 2773
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