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introduction：Injection molding technology has tended to reduce the wall thickness of the molded product and increase the number of holes during molding，So the injection molding machine needs to have a very high capacity，This includes the plasticizing effect of the rate、Homogenization and rapid response injection and reliable and correct mechanical design。 Current plastic product definition“Thin piece”This item is based on its flow length and/Ratio of wall thickness(L/Tthan) (Its section thickness to1mmAs for)Be at least greater than150It is called thin piece。 In order to improve the injection molding efficiency，Reducing wall thickness is not just about reducing material consumption or volume，The most important thing is to reduce the cycle time during molding，
2015-01-04 Reading quantity 2820
introduction：impedance：Finger containing resistance、Inductance and capacitance in the circuit，An obstruction to alternating current。Capacitive three-point oscillator（Also known as Cauz oscillator）：A type of self-excited oscillator。It is composed of series capacitor and inductance loop and positive feedback amplifier。The three ends of the two series capacitors of the oscillation loop are connected to the three pins of the oscillation tube respectively。 Loop filter：A low-pass filter with the following two functions：The high-frequency error component is attenuated at the output end of the phase discriminator，To improve anti-interference performance；When the loop exits the locked state，Raise the loop for short-term storage，And quickly restore the signal。 Differential circuit：exportation
2015-01-04 Reading quantity 2884
introduction：The main technical indexes of evaluating a quantitative packaging scale are quantitative accuracy and quantitative speed，That is, the efficiency of the packaging scale。However, quantitative speed is at odds with quantitative accuracy。It is difficult to achieve high accuracy and comparability，Sometimes it is more necessary at the cost of increased costs。This paper introduces prohibition comparison discrimination，The concept of packet detection，A new method is proposed under the premise of ensuring accuracy，Software control method to improve the working speed of packaging scale。 one、Comparative discrimination is prohibited At present, the quantitative packaging scale is mostly two-stage feeding or three-stage feeding，Its weight can be expressed by the following formula： Second level
2015-01-04 Reading quantity 2908
introduction： Whether the material is chosen properly remainsKOYOFactors that must be considered in bearing failure analysis。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。]The main task of failure analysis，Based on a lot of background material、Analyze data and failure patterns，Find out the main factors that cause bearing failure，In order to
2015-01-04 Reading quantity 1469
introduction： one、The function and type of the line The marking is based on the size requirements of the drawing，Use a needle tool to mark the wheel line of the part to be processed on the blank or semi-finished product（Or processing limits）Or a point used as a benchmark、A method of operating a line。The accuracy of the scribing is generally0.25～0.5mm。 1.Action of a line—That is, why should blank or semi-finished products be marked？ （1）The wheel corridor line is the processing limit and basis of the blank or semi-finished product，The reference point or line drawn is the mark or correction line when the workpiece is installed。
2015-01-03 Reading quantity 2803
introduction：At present, the stainless steel surface is treated by various methods：①Surface color whitening treatment；②Surface mirror bright treatment；③Surface coloring treatment。 Surface color whitening treatment：Stainless steel in the processing process，Through coil、binding、Welding or artificial surface fire heating treatment，Produces black oxide。This hard gray-black oxide is mainlyNiCr2O4andNiFTwo kinds ofEO4ingredient，In the past, hydrofluoric acid and nitric acid were generally used to remove strong corrosion methods。But this approach is costly，Pollute the environment，Do harm to human body，More corrosive，Be phased out。At present, there are two main treatment methods for oxide skin
2015-01-03 Reading quantity 1554
introduction：INAbearing[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。]When a single rotation is completed, the installation can be rotated by hand。Check the rotation flexibility of the clutch bearing，If the following abnormal phenomena are not found，Then the power operation check。 The instantaneous high temperature of the bearing grinding zone can make the surface a certain depth(10～100nm)The inside is heated to higher than the work
2015-01-03 Reading quantity 1466
introduction： When testing chromium steel and stainless steel as 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。]Material when the advantages，And it turns out theyre not just anti-rust。Chromium steel is the most common bearing material。Its harder than stainless steel，So the service life is longer。But at higher temperatures，Its performance is not so good。
2015-01-03 Reading quantity 1471
introduction： Imported bearings in use[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]when，We must first check the import of imported bearings[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]The appearance of，To determine whether it meets the standards we require。Bottom and large
2015-01-03 Reading quantity 1469
introduction：Abstract：This paper is based on analysis and experiment，Some basic characteristics of forming metal parts by direct sintering of metal powder with high power laser are described systematically。This mainly includes the spheroidization characteristics of molten pool in the laser sintering forming process、Melt flow characteristics，Dynamic solidification structure characteristics，The basic law of sintering process is further discussed，It provides a basis for direct laser sintering of metal powder。 keyword：Laser selective sintering，Metal powder，course，trait Since the birth of rapid prototyping technology，The rapid manufacturing of metal parts has become an attractive research direction[1~3]。Selective laser sintering（
2015-01-03 Reading quantity 2898
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