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introduction：(1)、Reduce the amount of hydrogen infiltration in the metal High intensity must be minimized/Pickling of high hardness steel fasteners，Because pickling can increase hydrogen embrittlement。During rust removal and oxidation，Try to adopt the method of sand blasting and shot blasting，If Rockwell hardness is equal to or greaterHRC 32When the fasteners are pickling，The pickling process must be developed to ensure that the parts are immersed in acid for a maximum time10minutes。The concentration of acid should be reduced as much as possible，And ensure that the parts in the acid soaking time does not exceed10minutes；When removing oil，Chemical degreasing methods such as cleaning agent or solvent degreasing are used，Less hydrogen infiltration，If using electrochemical
2015-04-15 Reading quantity 1563
introduction：1 introduction Hydraulic system with multiple actuators，Almost all have the technical requirements of synchronous operation。Especially under unbalanced conditions of heavy loads，Synchronization requirements are more prominent：Or else，It will cause poor equipment performance、Lose effectiveness，It can even be seriously damaged。therefore，The design scheme of synchronous system、Control method、The research on synchronization performance has important technical significance。 This paper is based on many years of practice and experiment，A new synchronization system is proposed，The system is based on the high synchronization performance obtained by pump control on the main oil circuit，An auxiliary valve control compensation system is also designed。Due to the valve control compensation system of high control accuracy and fast
2015-04-15 Reading quantity 2914
introduction：Rolling 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。]Installation of Repair of shaft and housing holes Rolling bearings before installation，The axis should be matched first、Shell hole、End cover and other parts are strictly inspected；On used axes、Shell hole，A comprehensive accuracy check should be made，Defective parts shall be repaired or repaired
2015-04-15 Reading quantity 2804
introduction：Double 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。]It is a relatively high-grade bearing。Several small steel balls surround the shaft in the bearing，When the fan page or axis rotates，The steel ball then rotates。Because theyre spheres，So theres less friction，And there is no problem with oil leakage。The advantage of double ball fans is long life，about40000
2015-04-15 Reading quantity 1564
introduction：Abstract In the numerical control machining graphics simulation verification，The traditional discrete image space method provides few observation and analysis means，Limiting its application；The object space method is computationally intensive，It is not real-time。This paper introduces a method to improve the data structure and algorithm on the basis of the basic image spatial discretization method，On the one hand, it will not lose the real-time simulation，On the other hand, it provides users with more convenient and effective means of analysis and observation，It has the advantages of object space method。 keyword Numerical control CAD/CAM NCverify NCsimulation Using computer simulation numerical control
2015-04-15 Reading quantity 2810
introduction：How to avoid forklift corrosion 1、Pay attention to the protection of exposed parts。Electrical appliances and fittings are arranged on the inside，Or add protective casing。The parts of the vehicle exposed to corrosion and water easily shall be equipped with dust cover。Such as，Inclined hydraulic cylinder、The exposed part of the piston rod of the steering hydraulic cylinder is provided with a dust jacket；A number of exposed process holes or functional holes on the vehicle body shall be provided with water-proof plugs。 2 、The structure of the parts should facilitate the implementation of the protection process，Open process holes if necessary。forklift，Such as，The openings on the fuel tank should be positioned so that the nozzle can cover the entire surface for shot peening。The process should be set up for the workpiece of chemical pretreatment such as the top protection frame
2015-04-15 Reading quantity 2892
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。]，To keep their working environment clean。 Even the eyes cant see the fine dust，Will bring bad effects of linear bearings[Linear bearing:Metal linear bearing is a linear motion system produced at a low cost，For use with infinite stroke and cylindrical shaft。Linear axis
2015-04-15 Reading quantity 1548
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，Measures such as compensation for grinding wheel wear were taken。30
2015-04-15 Reading quantity 2787
introduction：one、Conscientiously implement《Forging equipment through operating procedures》Relevant provisions。 two、Conscientiously implement the following supplementary provisions： （one） Work hard before you start： 1、Before the empty run test，A working trip should be manually turned first，Verify that the device is normal before starting。 2、Equipment with a hydraulic device、Check that the oil storage tank is full。Check valve after starting oil pump、Check whether pipes are leaking，The pressure should meet the requirements。Open the valve to drain the air from the system。 （two） Take it seriously at work： 1、Do not cut laminated sheet，Do not trim the edges of raw board，forbid
2015-04-15 Reading quantity 2783
introduction：Here we introduce the plastic mold design analysis softwareMoldflow Plastic Insight(MPI) ; MPIThe entire injection molding process can be simulated，And the impact of this process on injection molded products。Three dimensionsCADSoftware for injection molded parts models can be inputMPIConduct analysis。The software accurately simulates the flow of plastic melt in the mold cavity、Pressure holding and cooling process，The temperature of the melt and the product in the cavity at different times is provided、stress、Shear rate、Shear stress and maximum clamping force required；It can also calculate the mold maximum during injection molding
2015-04-15 Reading quantity 2730
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