introduction:Metal surfaces in various heat treatments、machining、During transportation and storage,It will inevitably be oxidized,An oxide layer of uneven thickness is produced。meanwhile,It is also susceptible to various oil pollution and adsorption of some other impurities。 Oil and certain adsorbent,The thinner oxide layer can be cleaned successively with solvent、Chemical treatment and mechanical treatment,Or they can be treated with chemicals。For heavily oxidized metal surfaces,The oxide layer is thicker,Can not be cleaned directly with solvents and chemical treatment,It is better to proceed mechanically first。 Usually the treated metal surface is highly reactive,More likely to be revisited
2015-04-22 Reading quantity 2911
introduction: Transmission is also called gearbox,It is a gear transmission device that can fix or shift the transmission ratio of the output shaft and the input shaft。Transmission is composed of transmission mechanism and transmission mechanism,The transmission mechanism is generally driven by ordinary gear,The ordinary gear transmission mechanism generally uses slip gear and clutch。The sliding gear is divided into multiple sliding gear and displacement sliding gear。The clutch is divided into mesh type and friction type。When using a engaged clutch,The speed change should be carried out when stopping or the speed difference is very small;The friction clutch can be used to change speed at any speed difference during operation,But the carrying capacity is small,And the two axes cannot be strictly synchronized。To overcome this shortcoming,
2015-04-22 Reading quantity 2819
introduction: one、 Great attention must be paid to improving 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。]The importance of clearance pass rate One of the main quality indexes of bearings is radial clearance。Radial clearance is in the finger、Total clearance between the outer ring channel and the rolling element in the diameter direction。 therefore,Bearing clearance is not only a guide
2015-04-22 Reading quantity 1576
introduction:Contour limitation Once the final value of the required load rating has been determined,You have to consider 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。]Dimensions required for installation,Including the installation and fixing of bearings considered here。And the size of the shaft matching the bearing with the required load rating。These factors help determine the bearing structure
2015-04-21 Reading quantity 1469
introduction: Content summary:The first 3 Chapter processing towel core processing technology3。1 The technological characteristics of the machining center are compared with those of ordinary machine tools,The machining center has many remarkable process characteristics。⑴ Wide process range,It can process complex surfaces as well as CNC milling machines,Machining center can also achieve multi-axis linkage and easy to achieve many ordinary machine tools are difficult to complete The first 3 chapter Processing technology of towel core 3.1 Process characteristics of machining center Compared with ordinary machine tool processing,The machining center has many remarkable process characteristics
2015-04-21 Reading quantity 2835
introduction: The UK has been in the Chinese market for six yearsCAMSoftware vendorPathtrace,In the last two years,An unprecedented rate of development has been achieved,Many Chinese users began to understand the unique advantages in CNC machining through various channelsEdgeCAMsoftware。This reporter interviewed during the China International Machine Tool ExhibitionPathtraceCountry manager of the companyNick Spurrett,On account ofNickIts regional markets include Asia、Many countries in Europe and North America,This aroused great interest from journalists。On-site reporter“Break the casserole and get to the bottom of it”typhloy
2015-04-21 Reading quantity 2892
introduction:Plastic injection molds are now the most widely used molds in all plastic molds,Capable of forming complex and high precision plastic products。This article is just a rough introduction。The design of plastic injection mold must first have a certain understanding of plastics,The main components of plastics are polymers。As we always sayABS The plastic is acrylonitrile、butadiene、Styrene three monomers using emulsion、Bulk or suspension polymerization process,It has the superior performance and moldability of three monomers,It is injected into the mold cavity at a certain temperature and pressure,Flow deformation,Obtain cavity shape,After pressure holding cooling, it is ejected into plastic products。Molecule one of the polymer
2015-04-21 Reading quantity 2908
introduction:General conditions stable rotating friction coefficient of reference values shown in plain 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。]normal0.010.020.10.2Bearing type friction coefficient.For ease of comparison with plain bearings,The friction torque of the rolling bearing can be calculated according to the bearing inner diameter by the following formula: M=uPd/
2015-04-21 Reading quantity 1537
introduction:Human sweat is a colorless transparent or light yellow with a salty taste of weakly acidic liquid,thereofphBe worth5~6Sodium free、potassium、calcium、Extra-magnesium salt,It also contains small amounts of urea、Lactic acid、Organic acids such as citric acid when sweat comes into contact with metals,A film of sweat forms on the surface of the metal,Sweat film can cause electrochemical effects on metals,Etch metal Under some special conditions of use,Add a small amount of solid lubricant to the grease,If joined3~5%the1Molybdenum disulfide reduces wear,Improve pressure and heat resistance,For high temperature、elegance、High vacuum、Corrosion resistance、Radiation resistance,And special conditions such as extremely low temperatures,fastening
2015-04-21 Reading quantity 1464
introduction: Low alloy steel refers to the addition of a small amount of alloying elements in the steel(Coincidence table5-1)Due to the strengthening of alloying elements,The yield point of low-alloy structural steel is higher than that of ordinary carbon steel25-150%,Plus mostly low carbon,It has good plasticity toughness and weldability,Some also have corrosion resistance、Low temperature resistance and other characteristics,therefore,Low alloy steel is a kind of steel with great development prospect,The proportion of steel production is increasing。 Low alloy steel is divided into ordinary low alloy steel according to quality and use、High quality low alloy steel、Special quality low alloy steel。 General purpose low alloy steel
2015-04-21 Reading quantity 1546