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introduction：beam 1 introduction Reinforced concrete beam due to design or construction errors、The material does not meet the requirements、Use function changes or durability reasons，The crack width exceeds the allowable value of the specification or the bearing capacity is insufficient，Should be reinforced treatment。There are two kinds of reinforcement methods: non-prestressed reinforcement and prestressed reinforcement。The non-prestressed reinforcement method takes effect gradually when the concrete beam continues to deform，Therefore, the crack width and deflection of the reinforced beam will continue to increase，Its a passive reinforcement method。The main advantage of the prestressed reinforcement method is its quick effect，With the application of prestress，Camber arch，Crack width reduction，The stress of the original steel bar and concrete is reduced，Its an active addition
2015-01-14 Reading quantity 2904
introduction：The application of the floating crushing roller in the pulp mechanism of the coating machine The gluing machine plays a connecting role in the whole corrugated cardboard production line，Whether the amount of glue is uniform，The position of glue wire is correct，Whether the corrugated shape is flattened、Amorphosis，All directly affect the efficiency of the production line and the quality of the cardboard。 The traditional gluing machine pulp mechanism is mainly the paper roller，In the past production line speed is low、Low production、Cardboard quality requirements are not high，It is simple in structure，Stable operation，Low manufacturing costs，It is widely used in China、Low speed corrugated board production line。however，In the production process，but
2015-01-14 Reading quantity 2812
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。]Preparation for Because the bearings are treated with rust and packed，Therefore, do not open the package until the installation is ready。 In addition，KOYOThe anti-rust oil coated on the bearing has good lubrication performance，Angular contact ball bearings or greased bearings for general use，Dont have to clear
2015-01-14 Reading quantity 1546
introduction： pick to: MastercamFor an excellentCAD/CAMsoftware，This article gives a brief introductionMastercamSome main functions of the software，The processing of saddle of cable-stayed bridge is taken as an example，Describes how to useMastercamThe software solves the problem of surface NC machining of complex parts。 keyword： Numerical control programming Application software saddle Surface machining one、 Numerical control programming software analysis At present, there are three kinds of numerical control programming methods： 1、Manual programming Manual programming
2015-01-14 Reading quantity 2871
introduction：The tooth profile of the outer gear is a distorted cycloid、The inner gear tooth is a planetary gear drive composed of an inner meshing gear and an output mechanism of a round pin。Except for the tooth profile of the gear,The other structure is the same as the planetary gear transmission with small tooth difference. The transmission ratio of the cycloidal pin wheel planetary reducer is about6～87，Efficiency is generally0.9～0.94。figure[Formation of tooth curve]Is the forming principle of the tooth curve。Occurs when the circle rolls over the base circle，if[0004-01]Greater than1，[m1]The dots are the long epicycloids；if[0004-02]Less than1，[m2]The dots are the short epicycloid;Use one of these cycloids
2015-01-14 Reading quantity 2806
introduction： (one)Steel plate and its classification Steel plates(Steel strip)It is a rectangular section steel with a large ratio of width to thickness and surface area，Usually delivered in sheets called steel plates ，Also known as plate；Very long in length、Delivered in rolls is called steel tape，Also called roll plate。The steel plate has a great covering and containing capacity， Can be used as roof panel、Cover material and manufacture containers、Oil storage tank、Packing box、Train box、Car casing、Industrial furnace shell Volume scheduling；Can be tailored and combined according to the requirements of use，Made of various structural parts and mechanical parts，It can also be made into welded section steel，Into the One step to expand the scope of use of steel plate；It can be bent and stamped
2015-01-14 Reading quantity 2878
introduction：TIMKENImported 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 quality is super good，So its very difficult to make。Many bearing manufacturers will not make it，Only go to hire a professional manufacturing technician will produceTIMKENImported 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，fagshaft
2015-01-14 Reading quantity 1459
introduction： 151 GB/T 4257-1984 Reaming drill technical conditions Core drills--Technical requirements 152 GB/T 4258-1984 60°、90°、120°Straight shank cone countersink Countersinks with parallel shanks for angles 60°90°and 120°inclusive 153 GB/T 4259-1984 The cone countersink
2015-01-14 Reading quantity 2873
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]Cleaning procedure： First of allSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabrik
2015-01-14 Reading quantity 1472
introduction：Metal-base inlaid solid self-lubricating 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。](For shortJDB)It is a novel lubricated bearing with the characteristics of metal bearing and self-lubricated bearing，The load is borne by a metal matrix，Specially formulated solid lubricating materials play a lubricating role。It has a high carrying capacity，Impact resistance，High temperature resistance，Self-lubricating energy
2015-01-14 Reading quantity 1459
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