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introduction： The quality of the die surface is related to the service life of the die、The appearance and quality of the parts are greatly affected，So before the mold is used，It is also the final stage of mold manufacturing，It is usually ground and polished，To improve the mold surface quality。And after grinding and polishing treatment，There are many mold manufacturing enterprises and mold use enterprises also use surface treatment technology，The purpose is to extend the service life of the mold，Improve the machining quality of the workpiece，Reduce the cost of mold use，Improve production efficiency。 At present，There are many surface treatment technologies on the market，The surface coatings formed are also varied，We follow the surface
2015-05-29 Reading quantity 2793
introduction：Gas dynamics of turbine machinery： One of the branches of fluid dynamics﹐This paper mainly studies the gas movement in turbine machinery and the interaction between moving gas and turbine machinery。Inside the turbine machinery there are alternating-arranged driving wheels and static wheels﹐Active output or input﹐The shape of the gas channel is complex。therefore﹐It must be considered when studying the motion of such gases﹕Relative flow and absolute flow in the moving wheel and the static wheel﹐And how they relate to each other﹑Conversion and cohesion﹔Interaction between the main stream and the boundary layer﹐Including the interaction between shock wave and boundary layer in transonic condition﹔Boundary conditions specific to turbine machinery﹐For example, periodic conditions。 usual
2015-05-29 Reading quantity 2946
introduction：Circular insert Multi-cavity injection molds are usually designed in this way，Turn hardened quality tool steel into round or rectangular inserts，Inlay in unquenched water，But as much as possible in a tempered template，The tempered steel can still be machined。Mold manufacturing should always take into account the use of inserts to secure the plate，This greatly reduces the deformation caused by quenching，Large formwork often deforms during quenching。Because the insert fixing plate is often bolted to another form，Therefore, the easiest way to secure the circular insert is to clamp the insert shoulder。In order to prevent circular arrangement or linear alignment of the inserts do not want some rotation，The inserts are next to each other，make
2015-05-29 Reading quantity 2941
introduction：Temperature control system and exhaust Bleed air system design 《one》 The temperature of the mold directly affects the molding quality and production efficiency of the plastic parts。 Therefore, a temperature adjustment system needs to be added to the mold to achieve the ideal temperature requirements。 Temperature regulation system can be divided into cooling system and heating system according to different situations。 one﹕Cooling system Generally, the temperature of the plastic injected into the mold is200About Celsius﹐The temperature when the plastic part is removed from the mold cavity after curing is in60Below Celsius。Thermoplastic after injection molding﹐The mold must be cooled effectively﹐Make molten plastic heat as quickly as possible
2015-05-29 Reading quantity 2943
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。]One revolution、Raceway surface of inner ring and outer ring，Due to the rolling contact with the rolling element，Therefore, the trajectory is dark，The running track attached to the raceway surface is not abnormal，The load conditions are thus known，So in disassemblyTIMKENBearing time，Please pay close attention to and observe the raceway surface
2015-05-29 Reading quantity 1581
introduction： 1、Light medium load 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。]Selection of lubricating oil Operating temperature10-60℃，Journal pressure3MPabelow： Spindle journal linear speed>9m/s，Lubricating oil40℃viscosity5-27mm2/s，Suitable lubricating oilL-AN
2015-05-29 Reading quantity 1491
introduction： Fengye Mall electric forklift brake for you to introduce the development history of electric forklift。 Forklift is a late-developing type of lifting and transportation machinery.The worlds first forklift truck was built by the American Clark Company1932It was put on the market in 2000,Then it developed rapidly，Especially after World War II,Forklift varieties and production in Europe and the United States have risen sharply.At present, several countries with large forklift production are the United States、Japan、Germany、Britain and Bulgaria。 Chinas battery forklift is produced in1954years，Combustion forklift manufactured in1958years。Current domestic forklift truck
2015-05-29 Reading quantity 2870
introduction：In the metal cutting process，Select a high cutting speed，Is not necessarily the only way to improve processing efficiency。Do not neglect the high feed machining solution at medium cutting speed，This is a conclusion drawn from a large number of cutting practices。Based on this new understanding，In order to meet the rapid development of the automobile manufacturing industry and aviation manufacturing industry and constantly develop new products market needs，Recently developed into a brand new technology——I.e., rate processing technology。They think，Often called high-speed cutting，It is used to cut at a very high cutting speed with a very low feed rate and a very small cutting depth。There are many such cutting schemes in practice
2015-05-29 Reading quantity 2824
introduction： one、Customize the right-click pop-up menu and shortcut keys： UGThe right-click popup menu contains some of our commonly used functions，For exampleRoate、FitEtc.，In order to use more convenient，We can build our own！unpackUGIn the installation directoryUGIIinferiormenusfile，It contains some*.menand*.tbr，We open it as text，The findings are not hard to understand。Such as，We want to right-click inside the pop-up menuroateandpanAdd between as illustratedviewinferiororientFeature，First, lets open it.ug_mai
2015-05-28 Reading quantity 2909
introduction：Applicable model： Plate winding machine：C235，W11-3×1500，W11-5×2000，W11-12×1800，WA11-19×2000，9241。 Board adjusting machine：44П21，12×1000 Seven roller board calibrating machine，32×4000Seven roller board calibrating machine。 one、 Conscientiously implement《General operating rules for forging equipment》Relevant provisions。 two、Conscientiously implement the following supplementary provisions： （one） Any equipment equipped with lubricating oil pump，The lubricating oil pump should be started before working，After the oil pressure normal indicator light，Ability starter
2015-05-28 Reading quantity 2903
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