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introduction：The quaternary topsoil of Jinqiao Coal Mine is thick383．1m，It is the thickest shaft with frozen surface soil in China，Water-rich formation，The main、Freezing method is used in construction of auxiliary shafts，Freezing depth412m。The freezing hole drilling work in the mine is large，Main and auxiliary Wells are designed together105omphora，Total drill footage37926．5m。stratum0～160mParagraphs contain more 砂礓，The maximum diameter is110mm；The lower part has multiple layers of strong expansive clay（Account for60％above），Large expansion，Maximum free expansion rate up to135％。All these bring many technical problems to the construction of frozen sinking engineering，For this purpose，In the scheme design
2015-04-10 Reading quantity 2780
introduction：familiarCAMThe architecture of the system basically has the following three patterns： 1) CAMSubsystem andCADandCAEAnd other subsystems are developed in the integrated system at the bottom level：CADThe subsystem provides powerful modeling and design functions for complex products，The generated product digitization definition model isCAMThe subsystem provides complete data service。CAMThe subsystem is carried out directly on the product digital modelNCTrajectory calculation，Generate with powerful post-processing modulesNCorder。There are many such systems，likeUGScorporateUnigraphics，PTCcorporatePro/Engi
2015-04-10 Reading quantity 2777
introduction：The problem of suspended solids in beer has always been a technical problem and a key point for breweries，Its research is a subject integrating theory and practice。By exploring the formation mechanism of beer suspensions、The method of identifying suspended matter and precipitate in beer was studied、To solve this technical problem by identifying the composition of suspended solids，It is a long and complicated work。For enterprise technicians，Enhanced filtration in appropriate processes，Avoid suspended solids entering the liquor，It is an effective way to solve the problem。 Liquid bag filter has been widely used and promoted in the famous manufacturers of domestic food and beverage industry，It is a closed filtration system，Divided into single bag type、double
2015-04-10 Reading quantity 2783
introduction：1.The process of cylindrical roller Blank forming→Deburring or banding→Soft grinding raceway surface→Soft grinding double end face→Heat treatment→Roughing the rolling surface before→Coarsely ground double ends→After coarse grinding rolling surface→End grinding double end→fine、Final grinding rolling surface→Super finishing rolling surface→cleanse、desiccation→Final inspection appearance、Size grouping→Oiled package。 2.The process of conical roller Blank forming→Deburring or banding→Soft grinding raceway surface→Soft grinding double end face→Heat treatment→Rough grinding rolling surface→Fine grinding rolling surface→Grind the ball base→Final grinding rolling surface→Super finishing rolling surface→cleanse、desiccation→Final inspection appearance、Size grouping→Oiled package。
2015-04-10 Reading quantity 1432
introduction：gongyelu paiyan xitong Industrial furnace exhaust smoke system fume dischange system for industrial furnace A system that uses a chimney or a mechanical device to exhaust the flue gas from the furnace of an industrial furnace。It is an important condition for the normal use of industrial furnaces to ensure the smooth exhaust of smoke，When smoke exhaust is not smooth，Furnace pressure rises，A large amount of flue gas will escape from the crevices around the furnace and increase the heat loss of the furnace，It affects the uniform distribution of air flow in the furnace，Reduce furnace temperature uniformity，Degraded operating environment。 Smoke extraction system
2015-04-10 Reading quantity 2776
introduction： Some molds are in a state of repeated heating and cooling during work，The surface of the cavity is strained、Pressure changes the role of stress，Causes surface cracking and spalling，Increase friction，Retarding plastic deformation，Reduced dimensional accuracy，Resulting in mold failure。Hot and cold fatigue is one of the main failure forms of hot working die，This kind of mold should have high resistance to cold and heat fatigue。 6．Corrosion resistance Some molds such as plastic molds are at work，Due to the presence of chlorine in plastics、fluorine，Decompose and precipitate after being heatedHCI、HFEqually aggressive gas，Erosion of the mold cavity
2015-04-10 Reading quantity 2796
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。]noise、The vibration has obvious randomness； 2.The average vibration frequency amplitude is in1kHzabove； 3.Regardless of the speed of the operation，The main frequency of noise is almost constant； 4.When the radial clearance of the bearing increases，The sound pressure level also increases dramatically
2015-04-10 Reading quantity 1550
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。]Formal term interpretation： There are many types of bearings，Bearing form refers to the bearing type used by the air cooled radiator fan。In mechanical engineering。However, the bearing form used on the radiator product is classified in accordance with its basic working principle：Use sliding friction
2015-04-10 Reading quantity 1456
introduction： In the past few years，China has introduced a large number of advanced processing and testing equipment from abroad，In terms of hardware, it has reached a high level，Solve the hardware problem in the field of machining and manufacturing，Then the introduction is advancedCAD/CAMSystem，It also brings a partCAMProblems that software cant solve。 How to seek a higher level of high-speed、5Spindle cloth？How to improve processing efficiency、Programming quality、Machine tool safety、Equipment utilization and cutting tool cost savings？In response to these problems，More advanced manufacturing technology has emerged internationally。Such as，Numerical control machine tool
2015-04-10 Reading quantity 2792
introduction：■ GermanyMTU corporation2000／4000Series engine GermanyMTUEngine Company is one of the most famous engine manufacturers in the world，Its latest electronic controls(Down to the fuel nozzle)The fuel common rail technology is known as the third generation engine speed control system。among2000／4000Series engine features are： 1． adoptMDECcontroller MTU MDECThe control actuator can be adjusted to each nozzle，In terms of control principles，Engine output characteristics are determined by the amount of fuel supplied。Conventional engines can only control the whole thing
2015-04-10 Reading quantity 1449
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