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introduction： A special machining method for the removal of conductive materials by the electrical erosion caused by the pulse discharge between poles immersed in the working fluid﹐Also known as electrical discharge machining or electrical erosion machining﹐English abbreviationEDM。 Brief history EDM 1943By Soviet scholars ..After the Lazarenkos studied the invention﹐With the improvement of pulse power supply and control system, it has developed rapidly。The initial pulsed power supply used was simpleRC (resistance-capacitance)loop。50Early era﹐Be improved toRLC (resistance-inductance-capacitance)Etc.
2015-04-02 Reading quantity 2780
introduction：Use of CNC latheG90、G92、G94order，It simplifies the process a little bit，But there is also a class called compound turning fixed cycle instructions，The procedure can be further simplified，Use these compound turning fixed cycle instructions，Can greatly improve the processing efficiency。Outer circle thick car cycleG70、Closed cutting cycleG73、Finishing cycleG70The main application of machining outer contour is the most，In the process of programming，The relevant instructions should be selected correctly。 one、Compound turning fixed cycle instruction overview 1
2015-04-02 Reading quantity 2900
introduction：Main use This machine is widely used in pharmaceutical、Chemical food and other industries of material crushing。 peculiarity High speed rotary knife of wind wheel is used in the crushing room，The air volume in the chamber is large，It is not easy to heat up in the chamber。Have smooth running、Easy to disassemble and clean、Low noise、Grinding effect is good and so on。 Working principle This machine adopts wind wheel type high-speed rotating knife，Set the knife for impact、Shear lapping，The crushing process created a strong airflow in the chamber，The heat in the crushing room is drained through the screen with the finished product，The particle size is obtained by replacing the screen。 Technical parameter
2015-04-02 Reading quantity 2786
introduction：20century70－80age，There has been a great development of reducer technology in the world， Reduction gear（figure3） And closely combined with the development of new technological revolution。The development trend of universal reducer is as follows： 1、High level、High performance：Cylindrical gears are generally carburized and quenched、Gear grinding，Increase of carrying capacity4More than，Small size、Light weight、Low noise、High efficiency、High reliability； 2、Modular design：The basic parameter adopts the priority number，Neat size，The parts have strong versatility and interchangeability，The series is easy to expand and renovate，It is beneficial to organize mass production and reduce cost；
2015-04-02 Reading quantity 2806
introduction：The boiling point of each component of liquefied raw gas used in deep cryogenic equipment is different，A device for separating gas components by multiple partial condensation and partial evaporation。The deep-temperature rectification column has a sieve plate column according to its structural form、Bubble cap tower、Floating valve tower and packing tower, etc。 How it works Multi-component liquids are placed in a closed container，Some of it evaporates when heated（Immediate partial evaporation）。Because each component has a different boiling point，The lower boiling point components of the liquid evaporate first，The composition of liquid and gas phases in the closed container is different。The concentration of low boiling point components in the gas phase is larger than that in the liquid phase；Middle height in liquid phase
2015-04-02 Reading quantity 2875
introduction： Automatic removal of condensed water and air from steam lines or steam equipment﹐And prevent the flow of steam through the diverter valve(Sight valve)。The condensed water and air in the steam are harmful substances that affect the heat exchange and the ability of the pipeline to pass through﹐Eliminating them can improve the efficiency of steam equipment﹐Steam saving﹑Reduce fuel consumption。There are many types of traps﹐According to the different principles of action can be divided into thermostatic type﹑Thermodynamic and mechanical3class。 Thermostatic trap The temperature difference between steam and condensate causes the temperature sensitive components to act differently﹐A trap to control the action of the opening and closing parts。figure1 Bellows trap
2015-04-02 Reading quantity 2806
introduction：HDUse and maintenance of weighing apparatus Working principle of electronic weighing apparatus:Place the weighed object on the bearing table,The sensor then deforms,Output a changing analog signal。The signal is amplified by operationA/Dconvert,Generate digital signal,Send it to the CPU for operational control,Then the central processor according to the keyboard instructions and program status,Transmit the final data
2015-04-02 Reading quantity 2794
introduction：（1）Planetary 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。]Large tolerance，A short life span。The meshing drive is prone to various interference due to the small tooth difference，To eliminate interference，The design generally adopts positive Angle displacement transmission，The meshing Angle increases after the gear is changed，The radial load of planetary bearing is increased；On the other hand，For structural reasons
2015-04-02 Reading quantity 2813
introduction：National rubber and plastic machinery standardization Technical committee plastic machinery standardization sub-technical committee from1987Since its establishment, it has organized relevant units to draft and implement plastic machinery standards approved by the machinery industry standards authority31item，Relevant standards are as follows： 1. JB/T2627-1991 Plastic extruding hard tube auxiliary machine 2. JB/T5289-1991 Rotary injection molding machine for shoes 3. JB/T5421-1991 Plastic film recycling extruded granulation unit 4. JB/T5291-1991
2015-04-02 Reading quantity 2905
introduction： （1）brightening brightening By chemical or electrochemical polishing，The process of brightening a metal surface 。 （2）Bright dipping bright dipping After the metal is impregnated in solution，Make the metal surface bright。 （3）polishing polishing The process of reducing the surface roughness of a metal。 （4）Soft wheel polishing buffing The metal surface is polished by a rotating soft wheel。The abrasive used on the wheel is a suspension containing fine abrasive particles、A paste or viscous grease
2015-04-02 Reading quantity 1516
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