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introduction：The process is outlined below： Water cooled metal type centrifugal casting process diagram Smelting Place ingredients(Steel scrap、Pig iron、Return charge, etc)Adding furnace(Induction furnace or cupola)，And the composition is adjusted，When the ingredients meet the process requirements，The hot metal is poured into the variable-frequency holding furnace for spheroidization。For example, the sulfur content in hot metal exceeds the standard，It needs to be desulfurized first。 nodulization When the composition and temperature of molten iron meet the process requirements，The spheroidizing agent is added to the hot metal，The flake graphite in hot metal is changed into spherical graphite，Send to centrifugal pouring department for pouring。
2015-03-13 Reading quantity 2876
introduction：one：What are the parallel lines of this projection plane？What is the property of the projection of this line？ a：When the line is parallel to the projection plane，They are called parallel lines of the projection plane。The projection of this line has authenticity。 two：Every sheet metal has a thickness，And the thickness of the plate has an effect on the shape and size of the drawing？ a：It has an effect on the shape and size of the expanded plot。 three：A ball，Members of rings and helical surfaces，How are the surfaces developed？ a：All the surfaces are undevelopable surfaces。 four：The expansion of prisms and cylinders，What expansion method is commonly used？
2015-03-13 Reading quantity 2780
introduction：1introduction At present, the installed capacity of Chinas electric power industry reaches3.16Hundred millionkW，The annual electricity generation is up13500Hundred million kWh。Chinas electricity consumption ranks second in the world after the United States，But our country per capita electricity only1038kWh，Less than the level of electricity consumption in developed countries10。 Last summer，Our country continues to be extremely hot，As a result, some cities have cut off electricity due to tight power supplies。The electricity shortage has changed from seasonal to year-round，Emergence of power、Power double gap，Unit long-term high load operation，Failure increase。Our country is in the rapid transition to large-scale industrialization and urbanization
2015-03-13 Reading quantity 2880
introduction：refractory、A furnace made of insulation and certain building materials、Combustion chamber、Flue and other industrial furnace body parts。The role of masonry is to enable industrial furnaces to withstand high temperature loads during heating or melting，Reduce heat loss，It is resistant to chemical attack and has certain structural strength，To ensure the heat exchange process in the furnace。 The structural masonry is composed of fire-resistant layer and heat-insulating layer。In order to ensure the strength and air tightness of masonry，The steel structure is also used on the outside of the masonry（hob）Tighten the masonry（See picture[Masonry diagram]）。The refractory layer is directly subjected to high temperature load and mechanical impact,Bear simultaneously
2015-03-13 Reading quantity 2782
introduction： 1．Cross slide coupling（WHtype） As shown in the figure2-8As indicated，A cross slide coupling is a half coupling consisting of two end faces with grooves1and3And a floating disk with a tenon on both sides2Be composed of。The two tenons of the floating disc are perpendicular to each other and are embedded in the grooves of the two halves of the coupling，The tenon slides in the groove of the half-coupling。The relative slide is used to compensate for the offset between the two axes。The deflection allowed by it Sum radial displacement （ Is the diameter of the shaft）。To avoid excessive wear and excessive centrifugal force，The shaft speed cannot be too high。To reduce wear、Increased longevity and efficiency，Between the mortise and groove
2015-03-13 Reading quantity 1535
introduction：Thrust aligning roller 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。]Structurally，The tight ring of its bearing、roller、The cage is locked by the bushing into a non-separated whole，However, the loop is separable from the whole。Lower bearing in vertical mounting，Loanable bearing、The weight of the shaft and other parts on the shaft，tighten、No separation is formed between the loops
2015-03-13 Reading quantity 1530
introduction：As early as150Before the New Year，Shuttle looms gradually replaced hand weaving，At that time, shuttle looms were more productive than hand-woven fabrics1times。1844Shuttleless looms began to appear，The flexible rapier loom began1925years，After World War II，50Date to60Commercialized production in the 1990s，And gradually made significant progress，At present, the weft insertion rate of rapier loom reaches1500m/minabove。 Rapier loom is mainly designed to solve the weft insertion method，Inclusive rigidity、Flexible and telescopic weft insertion。Its main products are clothing fabrics，Compared with other weft insertion methods，The weft insertion method of rapier loom is suitable for many
2015-03-13 Reading quantity 2888
introduction：Due to the characteristics of rapid prototyping technology，As soon as it appeared, it was widely used。At present, it has been widely used in aerospace、CARS、machine、corpuscle、Electric appliance、Medical science、unit、plaything、Crafts and many other fields，Great results have been achieved。 |Application in new product development|Rapid mold manufacturing|Medical science| Experimental analysis model| Construction industry |New technology of rapid prototyping combined with ceramic mold manufacturing|Statistics on the application of rapid prototyping in industry| Medical science Melt extrusion rapid prototyping has great application prospect in medicine。 On the basis ofCTorMRIData of，Apply melt extrusion fast
2015-03-13 Reading quantity 2765
introduction： Current situation of reducer abroad： Gear reducer is widely used in all walks of life，It is an indispensable mechanical transmission device。At present, there is generally a large volume of reducer、heavy，Or the problem of large transmission ratio and low mechanical efficiency。Foreign reducer，Germanically、Denmark and Japan are leading the way，In particular, it has advantages in materials and manufacturing processes，The reducer has good working reliability，Long service life。But its transmission form is still mainly fixed shaft gear transmission，Volume and weight issues，Its not solved yet。 Recent report，Developed by Sumitomo Heavy Industries in JapanFAMolded height
2015-03-13 Reading quantity 2890
introduction：First step New file File > New... > Enter file name： football > OK The second step Build a curve > > Select drawing plane：TOP > Okay > Default > Draw a picture1Section of > > OK > Complete the curve drawing，As shown in the figure2 The third step Create the first surface of rotation Feature > Create > S
2015-03-13 Reading quantity 2895
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