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introduction：In this steelmaking control system project，Our design is made by Siemens of GermanyPLC、communication、Industrial control software and transmission control products andKYLAND（Toto Telecom）Industrial optical communication products are composed of high quality、High-performance integrated control system，Complete the entire project process and drag control tasks。among，Five sets were adoptedS7-400typePLC、Fifteen setsS7-300typePLC、Nearly 100 setsMASTERDRIVERSeries drive products（Power ranges from severalKWInto the hundredsKW）。 ----The upper monitoring system is equipped with industrial control software by industrial control computer
2015-01-04 Reading quantity 2912
introduction：With the continuous improvement of injection molding processing accuracy requirements，In addition to the correct selection of materials and modification of the selected plastic，How to choose the correct molding process conditions，The relationship between the comprehensive shrinkage rate of the product and the parameters of the processing technology is analyzed reasonably，And the shrinkage rate of various reasons and processing factors on its influence is a very important subject。 1 Experimental part 1.1 Experimental material PP：1390type，Injection grade copolymerizationPP，Beijing Yanshan Petrochemical Company。 1.2 equipment Injection machine：SZ-100／160NB，Ningbo plastic machinery factory； mould：Steel casting
2015-01-04 Reading quantity 2897
introduction：16％All 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。]Improper assembly in advance(Usually excessive force)，Nor does it result in proper use of assembly tools。Some equipment requires machinery，Hydraulic or heating suitable and efficient means of installation and removal。Professional engineering offers a variety of services，A technology-based set of tools and
2015-01-04 Reading quantity 1570
introduction： series series：Number of sets of planetary gears.Because a set of planetary gears can not meet the large transmission ratio,Sometimes need2Nested or3Set to meet the requirements of supporting a larger transmission ratio.Due to the increase in the number of planetary gears,therefore2Lv OR3The length of the stage reducer will be increased,There will be a decrease in efficiency. Return clearance: Return clearance：Fix the output,The input is rotated clockwise and counterclockwise,Make the input end produce rated torque+-2%Torque hour,Theres a slight angular displacement at the input end of the reducer,This angular displacement is the return clearance.The unit is..."points",Just one
2015-01-04 Reading quantity 2832
introduction： In allKOYOIn case of premature bearing damage，approximately25％It is caused by improper installation or incorrect use。Heating may be required for various applications、Mechanical or hydraulic mounting methods to properly and correctly install automotive hub 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。]。Select the appropriate installer for the application
2015-01-04 Reading quantity 1478
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。]In addition to excellent quality，Its a very sophisticated part，Both high-performanceTIMKENbearing，If used improperly in the course of use，Not only can not achieve the expected performance effect，And it is easy to damage the bearing，Everyone must have been paying attention to lubrication。Besides lubrication
2015-01-04 Reading quantity 1569
introduction：Imported 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。]The causes of failure are often multi-factorial，All factors affecting the design and manufacturing process will be related to imported bearings[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。]Failure dependent，Analysis is not easy to judge。
2015-01-04 Reading quantity 1560
introduction：1、Abide by《General operating rules for casting equipment》Relevant provisions。 2、pre-work，Check whether the cooling circulation system of babbitt bearing is smooth；When working, it is necessary to always pay attention to whether the workers of the system are normal。If there is any problem，Maintenance personnel should be notified to check and repair。 3、pre-work，Point test run，And check the lubrication of babbitt bearing and transmission system（motor、coupling、retarder）And the ball mill body movement is normal，Just make sure everythings okay，Before production can proceed。 4、Working hours，Starting sequence of interlocking devices；Suction fan-→Ball mill--→Circular plate feeder。Shut down
2015-01-04 Reading quantity 2825
introduction： Length measurement technique using moire fringes generated by grating to measure displacement and contour shape, etc。When measuring displacement，The grating ruler and the indicator grating in the measuring grating pair are respectively fixed on the moving parts of the length measuring tool or machine tool（Such as slide frame）And immovable parts(For example machine guide)Up.。The two are separated by a very small gap(Generally speaking 0.05～0.1millimeter)。When the carriage moves，Periodic intensity variation of Moire fringe appearing on the grating pair，The electrical signal is converted into sinusoidal waveform by photoelectric conversion element，magnified、The whole
2015-01-04 Reading quantity 2807
introduction： Human reading error is one of the reasons that affect the measurement accuracy。It is inevitable，But it can be minimized。therefore，Pay special attention to the following points in use：1Position the multimeter horizontally before measuring，Perform mechanical zeroing；2Keep your eyes perpendicular to the pointer while reading；3Resistance time，You have to zero every time you change gears。Replace the battery when it cannot be set to zero；4When measuring resistance or high voltage，Do not hold the metal part of the pen with your hand，To avoid human resistance shunt，Increased measurement error or electric shock；5In measurementRCResistance in the circuit，We need to cut the power in the circuit，And drain all the electricity stored in the capacitor，
2015-01-04 Reading quantity 2895
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