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introduction：Injection molded plastic parts that are structurally difficult to release，Such as automotive oil pipelines and inlet and exhaust pipes and other complex shape of hollow plastic parts，They are usually formed by splitting them in half，And then put it back together，Resulting in poor sealing of plastic parts。With the increasing application of such plastic parts，The core forming process similar to lost wax casting was introduced into injection molding，Formed the so-called core injection molding method。 The basic principle of core injection molding is：A fusible core is cast with a low melting point alloy，The fusible core is then put into the mold as the piece for injection molding，After cooling, the piece containing the core is removed from the mold cavity，reheat
2015-03-08 Reading quantity 2799
introduction：A heat exchanger using a sheet tube as a heat transfer component﹐Also known as sheet heat exchanger。It is mainly composed of two parts: plate tube bundle and shell(In the picturea Plate and shell heat exchanger ) 。The contact points of pairs of cold formed slats are tightly welded together﹐A plate tube comprising a plurality of flat flow channels is formed(In the pictureb Plate and shell heat exchanger )。Many plates of varying widths are arranged in a certain order。To maintain the spacing between the plates and tubes﹐Insert metal strips at both ends of the adjacent plate tubes﹐And welded together with the sheet tube。The two ends of the tube form a tube plate﹐So that many plate tubes firmly connected together to form a plate bundle。The end face of the tube bundle is flat
2015-03-08 Reading quantity 2795
introduction：Reducer torque=9550×Motor power×Speed ratio×Service coefficient/Motor input revolution The calculation formula is T=9549 * P / n 。 PIs the rating of the motor（exportation）The unit of power is kilowatt（KW） denominator Is rated speed n The units are revolutions per minute (r/min) Pand nAvailable from Directly from the motor nameplate。 therefore，Reducer powerP=T*n/9550.
2015-03-08 Reading quantity 3087
introduction：FAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]We have the worlds most mature and comprehensive range of high-precision bearings for machine tool spindles，Represents the highest level of performance technology。Bearings are available for almost all spindle designs on the market。Therefore, the selection of linear bearings with flanges can meet the requirements of most specific applications。This kindFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a cage assembly with a solid window cage
2015-03-08 Reading quantity 1495
introduction： stress（MPa） No phosphating film Zinc phosphate treatment Manganese phosphate treatment Cadmium phosphate treatment 70 0.103 0.013 0.095 0.034 350 0.068 0.032 0.070 0.069 700 0.
2015-03-08 Reading quantity 2927
introduction：IndexcorporateG200The practical application of turning center in BMW production plant shows that：In the integrated intelligent machining unit，The processing time of the workpiece can be greatly reduced by using two pairs of spindles。The turning center is a parallel structure，Make the turning center for conventional turning and hard turning more reasonable。 Effectively save processing time IndexcorporateG200The turning center integrated processing unit has modularity、High power double spindle、Four-axis linkage function，Thus, the processing time is further shortened。With other clamping by means of a working shaft
2015-03-08 Reading quantity 2815
introduction： First up is the，Size limitation。usualNSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]The space that can be installed is limited
2015-03-08 Reading quantity 1420
introduction：Grease lubricated with pre-sealed type 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。]Sealing method of filling grease，And fill an appropriate amount of grease inside the housing，A filling method of fat supply that is supplemented or replaced at regular intervals。In addition，For machines with multiple high temperature bearings that need lubrication，Centralized supply is also provided by piping connections to each lubrication point
2015-03-08 Reading quantity 1452
introduction：chuan yong chaiyouji Marine diesel engine marine diesel engine Diesel engine has high thermal efficiency、Good economy、Easy starting、It has great adaptability to all kinds of ships，Soon after its introduction, it was used as a propulsion power for ships。to20century50age，In newly built ships，Diesel engines have almost completely replaced steam engines。Marine diesel engines have been civilian ships、The main power of small and medium-sized ships and conventional submarines（See Marine power plant）。Marine diesel engine can be divided into main engine and auxiliary engine according to its role in the ship。main-ship
2015-03-08 Reading quantity 2786
introduction：Electrical fire and explosion accidents are often serious personal casualties and equipment damage accidents。Electrical fire and explosion accidents occupy a large proportion in fire and explosion accidents，As far as electrical fires are concerned，Both the frequency of occurrence and the economic damage caused，The proportion of fires is on the rise。Distribution line、High and low voltage switchgear、fuse、socket、Lighting appliance、motor、Electrical equipment such as electric heating appliances can cause fire。Power capacitor、Power transformer、Power cable、Multi-oil circuit breaker and other electrical devices may cause fire in addition，It could explode itself。Electrical fire is very hot
2015-03-08 Reading quantity 2782
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