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introduction：Intel、MOTOROLA、IBMThe company and three national laboratories in the United States yesterday disclosed a stepper for ultra ultraviolet lithography technology（stepper）prototype。 Expert estimate，EUVInitial input0.07Pilot production of micron process，The future can at least bring the chip process technology0.03Micron domain，Not even straight0.007The possibility of micron processes。 ITdoorCiting the Asian Wall Street Journal reported yesterday，As some researchers had already predicted，Unless the industry adopts technology that reduces the circuit size of chips，Otherwise, the semiconductor industry has been growing for a long time
2015-01-05 Reading quantity 2889
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。]Ferrule rolling surface（Its a channel for my company）The final step is superfinishing，Its main function is to improve the rolling surface quality，Improve the rolling surface geometric accuracy and reduce the surface roughness value，This plays a key role in the assembly quality of the finished bearing。Therefore, the rolling surface inspection after superfinishing
2015-01-05 Reading quantity 1540
introduction： The measure of friction in the flow of a substance is called viscosity，To prevent contact surface wear between moving parts，SKFbearing[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]Lubricating oil must have sufficient viscosity，The viscosity value increases with the increase of temperature
2015-01-05 Reading quantity 1566
introduction：Applicable model：BCM-1/550，BC-1/750，KFZE-20，K25，K50 one、 Conscientiously implement《General operating rules for forging equipment》Relevant provisions。 two、Conscientiously implement the following supplementary provisions： （one） Check the drawing die and other before work、The parts should be intact without cracking。The drawing die is installed correctly，fastness。 （two） Take it seriously at work： 1、General process selection of the correct compression ratio。Compression ratio shall not exceed the range specified in the process。 2、When variable speed is required，Should be carried out after shutdown，The gearshift handle needs to be in the right position
2015-01-05 Reading quantity 2791
introduction： 1、Contact fatigue failure Contact fatigue failure refers toINAImported 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 working surface is subjected to alternating stress and produces failure。Contact fatigue spalling occurs on the bearing working surface，Often accompanied by fatigue cracks，It is first generated from the maximum alternating shear stress below the contact surface，It then extends to surface formation
2015-01-05 Reading quantity 1539
introduction： Rapid prototyping technology is a kind of high technology which has a wide application prospect and is constantly improving。 In casting production，template、Core box、Wax compression mold、The manufacture of die casting molds, etc., is often by machining methods，Sometimes a fitter is needed to finish，Time-consuming and costly，And the precision is not high。Especially for some thin wall castings with complex shapes，For example, the blades of aircraft engines、Marine propeller，CARS、The cylinder block of the tractor、Cylinder cover，Mold manufacturing is a perennial problem。Although some large enterprises of the foundry also imported some CNC machine tools、Profile milling and other advanced equipment，
2015-01-05 Reading quantity 2876
introduction：1、The transmission coupling of the reducer shall be equipped with protective devices when necessary，For example, there are protrusions in the coupling or the use of gears、Sprocket drive, etc，If output 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 radial load is large，The enhanced type should also be used。 2、The installation position of the reducer should ensure the operation of the staff，May include
2015-01-05 Reading quantity 2820
introduction：Green building materials in the development of circular economy should take countermeasures and measures？The author thinks，To solve the problem of sustainable development，It must rely on sound policy intervention by the state、Related technology development and innovation、The establishment of green standard system and specification、us
2015-01-05 Reading quantity 70609
introduction：Die manufacturing process refers to the main working parts of the die；punch、die、Processing and manufacturing method of convex and concave die, etc。At present in the domestic die manufacturing，The commonly used manufacturing process is as follows： 1、Electromachining molding technology The die manufacturing process is mainly based on EDM wire cutting and EDM perforation forming。 2、Special equipment mechanical processing molding technology To file saw machine、Profiling plane、Profiling milling、Molding grinding and optical curve grinding processing mainly die manufacturing technology。 3、Precision grinding molding process Roughing and semi-finishing with general and special equipment，Finishing with high precision grinding equipment，involve
2015-01-05 Reading quantity 2901
introduction：(1)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 sign of the square is removed The following three marking methods are prescribed for rolling bearings，namely： a.Mechanical processb.electroetchingc.Chemical method The chemical method is only suitable for a small number of test products；Write the gap group code and precision level code；And pairs of multiple bearing
2015-01-05 Reading quantity 1474
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