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introduction： Using the grinding wheel as a grinding tool to process cylindrical gear or some gear machining tool tooth surface gear machining machine。It is mainly used to eliminate deformation after heat treatment and improve gear accuracy﹐The precision of grinding teeth can reach 6～3level(JB179-83)Or higher。 19End of Century﹐For grinding gear shaper cutter﹐In the United States created a large surface grinding wheel gear grinding machine。20The beginning of the century﹐With the development of the automobile industry﹐Germany developed cone grinding wheel gear grinding machine﹐The United States adopts formed grinding wheel to grind automobile gear。1914years﹐To improve gear accuracy﹐Disc grinding wheel gear grinding machine made in Switzerland﹐Take compensation
2015-01-12 Reading quantity 2810
introduction：Aerobic treatment technology in municipal wastewater、Industrial wastewater treatment has been widely used，The main treatment forms are activated sludge and biofilm，Biofilm method is used to develop biofilters、Biological turntable、Biological contact oxidation and biological fluidized bed。My company in years of engineering design and actual operation，According to the characteristics of printing and dyeing wastewater——High pollutant concentration、High chroma、PHThe range of value change is large，Developed suitable for such wastewater treatment、Aerobic treatment process with its own characteristics——Biological contact oxidation method。 one、Reaction mechanism of biological contact oxidation method Biological contact oxidation is a kind of intermediate active pollution
2015-01-12 Reading quantity 2909
introduction：1 Electromagnetic current（voltage）Check and adjust relays 1.1 In addition to routine tests，Also need to carry out the following aspects of inspection and adjustment。 （1）Check that the fixing screws of the contact bridge and coil spring on the shaft are tightened。 （2）Check the longitudinal and transverse range of motion of the shaft，This scope should be0.2～0.3mm。 （3）After relay operation，ZThe bar and the upper and lower magnetic poles should be kept not less than0.3mmThe gap between。 （4）Check the contact of the relay for burn marks and uncleanliness，The Angle at which the contact bridge meets the static contact shall be55～65The degree of，
2015-01-12 Reading quantity 2918
introduction：Program according to the time sequence or logical relationship specified in the production process，A device that controls each stage of the production process in turn，Its called the compliance controller。The control mode of sequence controller has two kinds: sequence control and condition control。①Sequential control：Control according to a predetermined time series，That is, the steps of an action are only a function of time。②Conditional control：Control according to predetermined logical relationships。This control can either be carried out progressively in a predetermined sequence，That is, after the previous step is complete, go to the next step；It is also possible to determine the actions to be performed in the next stage according to the combined results of several actions。prime，Sequence control
2015-01-12 Reading quantity 2924
introduction：Pressure 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。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。]There are one-way and two-way，Unidirectional pressure ball bearings are equipped with steel balls between a set of raceway rings，Average contact Angle90°，Can only withstand unidirectional axial load，Not suitable for high speed rotation。Such bearings can be separated into three pieces，Both spacers have deep circular grooves for ball rolling
2015-01-12 Reading quantity 1475
introduction：Solution measure：Increase the strength of the gear，Manufacturing accuracy of gears，Reduce roughness values of gears and shafts。 Improve the installation accuracy and fastness of driven gears and shafts，The most important thing is to achieve a reasonable interference fit
2015-01-12 Reading quantity 2898
introduction： Precision positioning tableTUIs a kind ofUThe inner side of the zigzag slide rail is provided with a sliding table，Compact and small positioning table。Sliding table and linear guide rail are integrated structures，Two rows of large diameter steel balls and rails are used４Point contact structure，Therefore, it can maintain stable precision and rigidity when used for loads and composite loads with variable direction and size。In addition，adoptUZigzag rail，The anti-torque and torque rigidity of the slide rail are greatly improved。 Precision positioning tableTUThe width of the rail from25mmto130mmThere are8Kind of，The length of the sliding table can be selected。In addition，Ball bearings are also available
2015-01-12 Reading quantity 1567
introduction：Milk receiving tank Batching tank Direct-cooled milk storage tank A new type of plate heat exchanger with buckle type non-stick pad Automatic program control tube type ultra-high temperature sterilization unit Automatic semi-automatic plate sterilization unit Installation works Colloid mill Batching tank
2015-01-12 Reading quantity 2808
introduction：Product name certification based on standard test requirements(Standard clause number)Frequency routine Inspection and confirmation Test explosion-proof luminaireGB3836.1-2000Check the ground connector(15)Automatic interlocking device or warning sign inspection(21.2)Impact test(23.4.3.1)Drop test(23.4.3.2)Housing protection class test(23.4.4)Temperature measurement(23.4.6)Thermal upheaval test(23.4.6.2)Impact resistance test(appendixD3.4)Protection test of lead-in device(appendixD3.5)Lead-in device marking check(appendixD4.1)all
2015-01-12 Reading quantity 2806
introduction：aYield point（Physical yield strength）： designation：σs；unit：MPa(orN/mm2) intro：Refers to the metal material under tensile action to a certain degree，Its deformation（elongate）The ability of a material to resist external forces is suddenly increased greatly。 bSpecifies residual elongation stress（Yield strength、Conditional yield strength）： designation：σr；unit：MPa(orN/mm2) intro：Refers to the metal material after removing the pull call，When the residual elongation of the standard distance reaches a specified value stress；When the specified value is
2015-01-12 Reading quantity 1458
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