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introduction：Ever since1972Japanese scholarsFujishimaandHondainNN type semiconductorTiO2The photocatalytic decomposition of water on a single crystal electrode has been found since hydrogen production，Heterogeneous photocatalysis technology has attracted great attention from scientists at home and abroad。At present，In semiconductor catalysts used in heterogeneous photocatalytic reactions，TiO2As non-toxic、High catalytic activity、The advantages of good stability and strong antioxidant capacity are favored。 There are many kinds of antimicrobials，Different performance。According to the nature of the material，Can be classified as inorganic、Organic and biological antimicrobials Class III。Inorganic antimicrobials are availableZnO、TiO2、zeolite、phosphorus
2015-01-09 Reading quantity 2851
introduction：1.Aligning ball 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。]Installation of Whether the bearings are installed correctly，Influence accuracy，Life span，property。therefore，The installation design and assembly of aligning ball bearings are fully studied and the following conclusions are drawn，Standard projects typically work as follows： aStrong stamping is not allowed，Not allowed to use
2015-01-09 Reading quantity 1629
introduction：1．Programming origin and tool change point selection Theoretically speaking，The programming origin can be selected in any location。But in fact，The improper selection of the origin will make the next coordinate calculation very troublesome。therefore，The principles of determining the origin of the programming coordinate system are as follows： (1)The selection of programming origin should facilitate coordinate calculation。Try to select some special points that can intuitively determine the base coordinate value of the part as the coordinate origin，Can simplify the work of calculation，Also easy to program check。 (2)The selection of programming origin should be convenient for tool matching in machining。Because the purpose of the knife is to determine the position of the programming origin on the workpiece blank
2015-01-09 Reading quantity 1486
introduction：Gear measuring tool for measuring involute tooth profile(See Length measuring tool)。There are two common single-disc and universal types。 The single-disc involute measuring instrument adopts the base disc straight ruler mechanism，To develop into a method(See gear measurement)Make a measurement(figure1 [Single-disc involute measuring instrument])。The maximum diameter of the measurable gear is generally not greater than 600millimeter。When measuring gears of different diameters，It needs to be matched with the corresponding base disc。It is suitable for measurement in mass production5～6Grade precision gear，High accuracy can be measured3～4Grade precision gear。 Universal involute measuring instrument&
2015-01-09 Reading quantity 2850
introduction： KOYOBearing maintenance and maintenance is very important，It is related to its service life，Work efficiency，Know how to care for your own useKOYObearing，Benefit a lot，In terms of work, it brings you high productivity，Produce precision products of high quality，Economically speaking，Several maintenance sessions can extend life and save you the cost of a new purchase。 A ball bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。also
2015-01-09 Reading quantity 1503
introduction： Numerical control machine tool： 1.Inverter analog frequency control function，Accept the speed command by the CNC system，To achieve the best speed collocation。 2.Regenerative braking function of inverter，To make the spindle fast、Steady braking。 Textile machinery： 1.Application frequency converter stepless speed regulation performance and special application functions，Simplified complex mechanical structure，The cone wheel was canceled、Three automatic forming mechanisms，Controller device, etc。 2.Soft start function and quick speed control，raised
2015-01-09 Reading quantity 2901
introduction：dianzuhan Resistance welding resistance welding Pressure is applied to the weldment through the electrode，At the same time, the resistance heat generated by the current passing through the contact point is used for welding，Also known as contact welding。The form of resistance welding is spot welding、Projection welding、Seam welding and butt welding。High resistance welding productivity，Easy to realize mechanization and automation，However, the required welding machine is complex and consumes large electric power，Mainly used for mass production。 Spot welding lapped the workpiece to the top、Press between the bottom two electrodes，The workpiece is partially melted after power is applied，After cooling, it solidifies to form a solder joint
2015-01-09 Reading quantity 2818
introduction：PA6 polyamide6Or nylon6 Chemical and physical properties PA6The chemical physical properties andPA66Very similar，however，It has a lower melting point，And the process temperature range is very wide。Its impact resistance and solubility ratioPA66Be on good terms,But its also more hygroscopic。Because many of the quality characteristics of plastic parts are affected by hygroscopicity，Therefore usePA6This should be taken into account when designing products。In order to improvePA6Mechanical properties of，A variety of modifiers are often added。Glass is the most common additive，Synthetic rubber is sometimes added to improve impact resistance，Such asEPDMand***
2015-01-09 Reading quantity 2815
introduction： According to the law of supply and demand to determine the economic and reasonable material storage in the process of production and circulation management。Inventory management should act as a buffer﹐Make the logistics balanced and smooth﹐Both to ensure normal production and supply﹐And can reasonably compress the stock of funds﹐In order to get better economic results。 1915years﹐ColumbianF.W.Harris published models of economic order sizes﹐Pioneered the study of modern inventory theory。Before this﹐ItalianV.Pareto, in his research on the distribution of wealth in the world, once proposed that
2015-01-09 Reading quantity 2890
introduction： Current，Shorten the production cycle、Improving production efficiency is an important development direction of large extrusion and blowing hollow plastic molding machine。Industry insiders point out that，Domestic enterprises for this kind of equipment development focus should be changed。 first，The plasticizing ability of the machine should be improved。The screw barrel with high plasticizing performance and high conveying capacity should be developed，Vigorously promote、Apply with forced-feed、Forced-cooled high yield plasticized extrusion“IKV”structure。 second，Increase the blowing pressure、Blow molding with low temperature dry high pressure air，Because this is to shorten the blow molding cooling molding time and improve the quality of the product
2015-01-09 Reading quantity 2795
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