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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﹐phototransfer
2014-12-13 Reading quantity 2844
introduction：Radiator thermostatic valve（RadiatorThermostat，Also known as temperature control valve、thermostat）Install on the inlet pipe of each radiator，The user can according to the requirements of the room temperature，Adjust and set room temperature。As it works，The thermostatic valve is a proportional controller，That is, according to the deviation between the room temperature and the thermostatic valve setting value，proportionally、Open or close the valve smoothly。The opening of the valve is maintained at the position corresponding to the demand load，Its water supply and room temperature remain stable。Relative to a certain set value, the temperature change range of the thermostatic valve from fully open to fully closed position is called the ratio of the thermostatic valve
2014-12-13 Reading quantity 2842
introduction： Rolling 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。]At the time of manufacture, there is a stipulated clearance in the contract,This gap is generally referred to as the original gap;But shouldFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And protection with solid window cage
2014-12-13 Reading quantity 1535
introduction：Outer spherical 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。]Series introduction： Outer spherical ball 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，
2014-12-13 Reading quantity 1512
introduction：INAImported 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 radial internal clearance decreases as the bearing advances on the cone journal。Reduce the value by measuring，You can determine the degree of interference and the tightness of the fit。For tapered bore bearings，The inner ring is always installed with interference fit。Different from cylindrical hole bearings，The interference of tapered bore bearings is not determined by the selected shaft fit tolerance，Instead, bearings are made in a cone journal、Shaft sleeve or dismount
2014-12-13 Reading quantity 1516
introduction：How to guaranteeSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]Normal during operation，How to makeSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“Sky
2014-12-13 Reading quantity 1517
introduction：Japan cooling packaging system plant type will collect liquidCO2Food spray（Meat and aquatic products, etc）Preservation technology，It has opened the eyes of many people in the food packaging industry。In fact，The application of this low-temperature quick-freezing preservation technology has been as early as20In the late 1980s，It has been jointly developed by Sichuan Cryogenic Equipment Research Institute and Sichuan University of Science and Technology，It is mainly used in railway refrigerated cars and semi-trailer food cryogenic quick-freezing refrigerated cars。This cold storage technology is fundamentally different from traditional cold storage technology in the past，It is characterized by low temperature liquid automatic spray temperature control and preservation。The use of low temperature quick-freezing method features：Will not cause environmental pollution，
2014-12-13 Reading quantity 2848
introduction： A test to determine the mechanical properties of materials subjected to bending loads﹐It is one of the basic methods to test the mechanical properties of materials。The bending test is mainly used to determine brittle and low plastic materials(Cast iron﹑High-carbon steel﹑Tool steel)The bending strength can reflect the deflection of the plastic index。Bending tests can also be used to check the surface quality of materials。The bending test was carried out on a universal material machine﹐There are two loading methods: three point bending and four point bending(See picture Diagram of bending loading mode )。The cross-section of the sample is
2014-12-13 Reading quantity 2871
introduction： As the beginning of this topic，In this paper, the composition of CNC machining on-line detection system、Working principle、The programming method and simulation are briefly introduced。Much of the content in the article is a summary explanation，It is very helpful for everyone to understand the technical content of the field。 Numerical control machine tool is the product of modern high-tech development，Whenever a batch of parts begins to be machined，Theres a lot of testing that needs to be done，Including clamping of fixtures and parts、alignment、Part programming origin
2014-12-13 Reading quantity 2842
introduction：Hydraulic oil is used as a working medium in hydraulic transmission systems，The transfer of energy、Conversion and control roles，At the same time, it also plays the lubrication of various components in the hydraulic system、anti-corrosion、Rust prevention and cooling。The seals in the hydraulic system prevent fluid from leaking between the joint surfaces、Maintain pressure、Maintain energy transfer or conversion。 At present, most sealing materials used at home and abroad are polymer elastomers，Plastics and various metals are also used in some special conditions。But it doesnt matter what kind of material，All should have the following properties： 1、It has certain mechanical and physical properties：Such as tensile strength、set
2014-12-13 Reading quantity 1498
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