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introduction： 1）、Resolution For the bar scan system，The resolution is the width of the narrowest bar that is correctly detected to be read，The English is...MINIMAL BAR WIDTH（For shortMBW）。When selecting equipment，It is not that the higher the braid rate of the device, the better，Instead, a reading device with the appropriate resolution should be selected according to the barcode density used in the specific application。In use，If the resolution of the selected device is too high，The stain on the bar、The impact of deinking on the system will be more serious。 2）、Scanning depth of field Scanning depth of field refers to the premise of ensuring reliable reading
2015-02-01 Reading quantity 2879
introduction： Thin wall injection molding machine、mould、Plastics are required。This paper discusses the characteristics of thin wall、Economic benefits and equipment design。 What is thin wall？ Simple view，When the wall thickness is less than1 mmIt is called thin wall。More comprehensively，Thin wall definition and process/Wall thickness ratio、The viscosity of plastics is related to the heat transfer coefficient。 The process from the main channel of the mold to the farthest point of the finished productL，Divided by the wall thickness of the finished productt ,Called process/Wall thickness ratio。whenL/t＞150when，Called thin wall。Such as the thickness of the process is inconsistent，It can be calculated in sections as shown in the figure1in。
2015-02-01 Reading quantity 2820
introduction： 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]The equipment lubrication management isSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken
2015-02-01 Reading quantity 1473
introduction： Cold storage design specification National standard of the Peoples Republic of China GBJ72--84 Editorial department：Ministry of Commerce of the Peoples Republic of China To which department：State Planning Commission, Peoples Republic of China Date of implementation：June 1, 1985 About release《Cold storage design specification》A notice of scale［1984］2363No. According to the reasons of the home construction committee（78）Construction and development of character regulation562The requirements of the text，Yushang
2015-02-01 Reading quantity 2822
introduction：For more rational use of metal materials，Give full play to its role，Must master all kinds of metal materials made of zero、The properties that the component should have under normal working conditions（Service performance）And the properties that the material should have in the process of cold and hot processing（Process performance）。 The useful properties of materials include physical properties（In specific gravity、Fusing point、Electrical conductivity、Thermal conductivity、Thermal expansibility、Magnetic scheduling）、Chemical property（Durability and corrosiveness、Oxidation resistance），Mechanical properties are also called mechanical properties。 The process property of the material refers to the adaptability of the material to cold、The ability of hot working methods。 （one）、Mechanical property Mechanical properties refer to metal materials
2015-02-01 Reading quantity 1547
introduction： one、Eutectoid steel、Hypoeutectoid steel、Hypereutectoid steel 1.Eutectoid steel Carbon dissolves in a lattice of iron to form a solid solution，Carbon dissolve intoα——The solid solution in iron is called ferrite，Dissolve intoγ——The solid solution in iron is called austenite。Both ferrite and austenite have good plasticity。When all the carbon in the iron-carbon alloy cannot be dissolved into ferrite or austenite，The remaining carbon will form compounds with the iron——Iron carbide（Fe3C）The crystalline structure of this compound is called cementite，It is extremely hard，Plasticity is almost zero。 Slave reflecting steel
2015-02-01 Reading quantity 2919
introduction：PDM: Product data management Product Data ManagementProduct-centric，Through computer network and database technology，The technology that integrates all product-related information and processes in the production process of an enterprise for management。 BPR: (Business Process ReengineeringEnterprise process reengineering)：Fundamentally rethink and completely redesign business processes，To achieve critical performance，E.g. cost、Quality、Service and response speed，Make a breakthrough。 BOM:
2015-02-01 Reading quantity 2910
introduction：American electrical engineer,Director, Institute of Electrical and Electronics Engineers1902years3month15He was born in Strasbourg1923He received a Bachelor of Engineering degree from the Massachusetts Institute of Technology。1923～1924At the Royal Institute of Technology in Stockholm, Sweden。1924～1929He worked as a mechanical and electrical engineer at General Electric Company in the United States, where he studied synchronous motors and power transmission theory1928The model of idealized synchronous motor and its armature flux equation are presented，Commonly referred to as the Parker model and Parker equation；Various reactance parameters of synchronous motor are also defined。1929years,He proposed the double reaction of synchronous motors
2015-02-01 Reading quantity 2837
introduction：ranshao qianghua Combustion intensification intensification of combustion With all kinds of physics、Chemical method，Make the combustion as efficient as possible in the smallest possible space。There are many ways to enhance combustion。 Inclined blade for swirl combustion、Spiral grooves or tangential air intakes rotate the fuel stream，To enhance turbulent pulsation and mixing，Enhanced heat transfer properties，Increased gas return，Extend the residence time of fuel particles，Thus enhancing combustion。This method has been widely used in various combustion suits
2015-02-01 Reading quantity 2808
introduction： 1.IKOImported 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。]In the process of use due to its own quality and external conditions，Its carrying capacity、Rotation accuracy and wear resistance will change.When the performance index of the outer spherical bearing is lower than the use requirements and can not work normally，The bearings fail or even fail，Once the rolling bearing failure and other accidents，machine、The device will stop running，Out of the
2015-02-01 Reading quantity 1568
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