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introduction： With the increase of demand for plastic products and the expansion of application fields，Higher and higher requirements are put forward for plastic molds，Promote the continuous development of plastic molds，At the same time, it also led to the rapid development of plastic die steel，Mainly in the development of plastic mold steel accelerated，Rapid increase in variety，However, at present, the plastic mold material is still mainly steel。According to statistics，Chinas plastic die steel has accounted for more than half of all die steel。Reasonable selection of plastic die steel and heat treatment process To ensure the quality of plastic mold，It is important to improve the service life of plastic mold and reduce the production cost。 ⒈Working conditions of plastic molds
2015-04-17 Reading quantity 1548
introduction： In order to ensureSKFTapered roller 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。]Long life，The method of oil lubrication is more reliable than that of grease lubrication，As long as you choose the right oil,Well filtered，Fuel supply，Regular inspection and timely replacement，The key is to ensure membrane roughnessλIn-greater than1As close as possible4，
2015-04-17 Reading quantity 1447
introduction：Plastic cards have practical value in addition，Also easy to carry，Plus manufactureI.C.Chip technology improvement，The chip can be small enough to be buried and used in the plastic card，liftedI.C.The card acts as a medium for the computer system。In view of the expanding range of applications of plastic cards，And its collection value is getting higher and higher，The printing process really deserves a lot of credit。 First of all, the introduction of the relief plate information card Limited company in the printing of plastic cards。On the day of the visit，Mr. Kato Ji Riku, Managing Director of Topplate Information Card Co., LTD、Mr. Liu Jianxiang, General Manager of Finance Department、Mr. Suenaga, General Manager of Production Department、Give birth to
2015-04-17 Reading quantity 2894
introduction：A device for storing liquid pressure energy in a hydraulic transmission system。Accumulators are used in two ways。①When moving at low speed, the flow required by the load is less than the flow of the hydraulic pump，The excess flow of the hydraulic pump is stored in the accumulator，When the load required flow is greater than the hydraulic pump flow，The fluid is released from the accumulator，To supplement the hydraulic pump flow insufficiency。②When the machine is shut down but still needs to maintain a certain pressure，The hydraulic pump can be stopped and the accumulator compensates for the leakage of the system，To keep the pressure on the system。Accumulators can also be used to absorb pressure pulsations from hydraulic pumps or to absorb hydraulic shock pressures generated in the system。The pressure in the accumulator can be compressed gas、It is produced by a hammer or spring
2015-04-17 Reading quantity 2779
introduction：(1)Rolling bearings with low noise requirements[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。] In the production of standard bearings，Some single-row radial ball bearings and short cylindrical roller bearings have low noise varieties for motor bearings。Which ball bearing from inside diameterφ2.5mmtoφ60mmThere are several varieties of beltsZl、Z2andZ3Three kinds of
2015-04-17 Reading quantity 1459
introduction：Current，Injection molding manufacturers are closely related to the plastic mold industry。Injection molding product quality and injection molding production efficiency are closely related to plastic molds。According to statistics，80%The above quality and efficiency are related to plastic molds。The importance of molds in injection molding enterprises is reflected in the following points。 one：The delivery date of the mold，Which is the premise of being able to start mass production。The enterprise management level of mold manufacturers is one of the important conditions for the efficiency of mold manufacturing。 two：The molding cycle of the mold，This determines the production efficiency of injection molding。The thought and idea of the mold designer is the decisive factor of the mold forming cycle，In addition
2015-04-17 Reading quantity 2793
introduction： Conical holeSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]，The inner ring is always installed with interference fit。 And cylindrical holeSKFbearing[SKFbearing:SKFThe full name is“Sv
2015-04-17 Reading quantity 1448
introduction：Abstract:HerewedescribethewideusesofACconverterinthepaper machine,suchasthestockonsystem. Andthebasiccontrolprinciplesareestablished. Keywords:ACconverterspeedcontroltensioncontrol [Chinese library classification number]TM921[docu
2015-04-17 Reading quantity 2876
introduction： Serial number mark quasi Ed No. nature mark quasi The name According to Commencement date Replaced by standard number Bid acquisition situation 1 JB/T10226.1
2015-04-17 Reading quantity 2898
introduction：AmericaA-B7360CNCSoftware is a typical front-end and back-end software。Its structure block diagram is shown in the figure。On the right side of the diagram are the tasks handled by the real-time interrupt program，The main maskable interrupts are10.24msReal-time clock interrupt、Reader interrupt and keyboard interrupt。The reader interrupt has the highest priority，10.24msReal-time clock interrupt has the lowest priority，Keyboard interrupt has the lowest priority。Reader interruption occurs only after the reader is started while entering the part program，Keyboard interrupts also occur only in keyboard mode，while10.24msInterrupts are always timed。The left side is the background program
2015-04-17 Reading quantity 2801
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