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introduction：After the turning tool is blunted，Necessary sharpening，In order to restore its proper shape and Angle。The turning tool is generally sharpened on a grinder。White alumina grinding wheel for grinding high speed steel turning tools，Green silicon carbide grinding wheel for grinding carbide turning tools。 When the tool is resharpened，Often according to tool wear，Grinding the relevant tool face。The general order of turning tool sharpening is：Sharpen the back of the knife→Sharpen the rear blade face→Sharpen the front edge→Sharpening tip arc。After sharpening the tool，A stone is also used to fine grind each knife face。In this way，It can effectively increase the service life of the tool and reduce the roughness of the workpiece surface。 Pay attention to the following things when sharpening the tool： （1）Tool grinding time
2015-04-08 Reading quantity 1540
introduction：Support the small shaft on the operating side of the replacement bucket roller（66.030.059）Damaged needle roller bearing inside[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。]Encountered a thorny problem－How to remove the damaged bearing？ The maintenance man drilled the outer edge of the bearing with an electric drill，Only a thin sheath was left inside the hole，But take it out by hand
2015-04-08 Reading quantity 1536
introduction：At present, the development of mold technology presents three major characteristics The die and press are used to determine the stamping quality、Precision and production efficiency are two key factors。Advanced presses are only equipped with advanced molds，To make the most of it，Achieve good results。The development direction of the mold is： one、Make full use ofITTechnology development mold design、manufacture。User on press speed、precision、Changing efficiency and other aspects of the increasing requirements，Promote the development of mold。The body and engine are the two key components of a car，Auto body mold, especially large and medium-sized covering parts mold，Its technology intensive，Embodying contemporary model
2015-04-08 Reading quantity 2869
introduction：lubricant To reduce the friction resistance of the friction pair﹑A lubricating medium that slows its wear。The lubricant also cools the friction pair﹑Cleaning and preventing pollution and other functions。To improve lubrication performance﹐Suitable additives may be added to some lubricants。When choosing lubricants﹐Generally, the motion of the friction pair must be considered﹑Materials﹑Surface roughness﹑Working environment and working conditions﹐And the performance of lubricants and other factors。In mechanical equipment﹐Most lubricants are distributed through the lubrication system to the parts that need lubrication。 Common lubricants are liquid lubricants(Mineral lubricating oil﹑Synthetic lubricants and water-based liquids)﹑oiling
2015-04-08 Reading quantity 2773
introduction：At present，The hydrogen cooled generator with double flow ring seal oil structure in China has the problem of large amount of hydrogen replenishment in different degrees。The hydrogen consumption of a hydrogen-cooled generator increases the cost of the hydrogen itself，The efficiency of the generator is also low because the purity of hydrogen in the hydrogen-cooled generator decreases、Coil temperature rises to the problem，It seriously affects the safe and economic operation of generators。In addition due to the equipment structure、operation、Maintenance reasons，Causing oil to enter the generator，Cause generator coil insulation drop，It brings hidden danger to the safe operation of the generator。therefore，To solve the problem of large amount of hydrogen replenishment for hydrogen cooled generator with double flow ring sealing oil structure、It is important to eliminate fuel intake to the generator。
2015-04-08 Reading quantity 1510
introduction： Machinery used directly in mineral extraction and enrichment operations﹐Including mining machinery and mineral processing machinery。The working principle and structure of prospecting machinery are mostly the same or similar to those used for mining similar minerals﹐Broadly speaking, it is also a kind of mining machinery。A large number of cranes are also used in mine operations﹑conveyor﹑Ventilator and drainage machinery。 Mining machinery Mining machinery is the mechanical equipment used in the direct mining of useful minerals and mining﹐include﹕Mining machinery for mining metallic ores and non-metallic ores﹔Coal mining machinery for mining coal﹔Oil drilling and production machinery used to extract oil。The first typhoon moving disc shearer was made by
2015-04-08 Reading quantity 2779
introduction： Common failure causes and solutions of cochlear gear reducer： Worm gear reducer is a compact structure、Large transmission ratio，Transmission machinery with self-locking function under certain conditions。The hollow shaft type cochlear gear reducer not only has the above characteristics，And easy to install、Reasonable structure，It has been used more and more widely。It is to install a helical gear reducer at the input end of worm gear reducer，The multistage reducer can obtain very low output speed，It has higher efficiency than single stage worm gear reducer，And the vibration is small.、Low noise and energy consumption。 one、Common problems and their causes
2015-04-08 Reading quantity 2876
introduction：one、Face cutting Common end turning tool（Elbow knife and deflection knife）And the way the car ends,For both the outside of the car and the end of the occasion，Bend and deflection tools are often used to turn the end face。The elbow turning tool is used for cutting with the main cutting edge，Suitable for turning large end faces。Turn the end face from the outside in，It is the auxiliary cutting edge when the car is round，The front Angle of the secondary cutting edge is small，The cutting is not light enough. Turning faces inward and outward，There is no such disadvantage，But the workpiece must have holes。 End operation attention points： （1）When installing a job，The outer circle and the end face should be straightened。 （2）When installing the turning tool，The knife
2015-04-08 Reading quantity 1421
introduction：one、The organization system and procedure for the certification of explosion-proof electrical products in the United States The certification system in the field of equipment used in dangerous places is responsible for the certification of coal mine equipmentMHSA（United States Mine Safety and Health Administration）、Non-mining electrical equipmentUL（Underwriters Laboratory of America）、Electrical equipment for factories、instrumentalFM（American Factory Inspection Service Association）tripartite，Responsible for the explosion-proof inspection and certification of electrical equipment in dangerous places in the United States。1、UL——Underwriters Laboratory of America Underwriters Buy Laboratory is a private company、A non-profit certification body with multinational operations，Mainly responsible for experiments in the field of explosion-proof electrical products
2015-04-07 Reading quantity 2884
introduction：1、Plain 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。]It can also be lubricated with grease，The following points should be considered when choosing a grease： 1）Large bearing load，Low speed，Grease with small cone penetration should be selected，On the contrary, choose the one with the highest degree of coning。High speed bearings choose smaller cone penetration、Grease with good mechanical stability。Special note
2015-04-07 Reading quantity 1444
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