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introduction： There are four stages in the restoration of a typical mold(disassembly、Fault diagnosis、Clean flat and assemble)。Prepare the tooling for assembly。 The accurate and reliable assembly of the mold mainly includes the preparation and method of controlling the following steps： ◆Application of anti-rust agent ◆OThe installation of the sealing ring ◆Installation of cavity die in template ◆Template installation including cavity mold ◆Processing sequence ◆assemble It takes patience to install and assemble tight tolerances、Steady gesture、Be careful
2015-02-13 Reading quantity 2792
introduction： Thermoplastic polymer molding is basically a physical process of form transformation。The thermosetting polymer not only has the change of physical state in the forming process，And chemical changes，And its irreversible。Thermosetting polymers are similar to thermoplastic polymers before they are cross-linked，Theyre linear polymers。However, thermoset polymers have reactive groups or reactive sites in the molecular chain，The molecular chain is formed by the action of its own reactive group or reactive active point and crosslinking agent（hardener）The action of crosslinking occurs，Make a line form a body structure。This cross-linking reaction for thermosetting polymers，Viscosity reflects the degree of cure。&n
2015-02-13 Reading quantity 2787
introduction：one、Some need to pay attention to the norm Nothing can be accomplished without rules。UseUGThere also needs to be certain norms（It should of course be tailored to the needs）。The first is that file naming must be regular，For example, the main digital module can be named with the part number such asXXXXXX.prtOther documents should be prefixed or suffixed, such as those used to provide drawings-dwg，The modified modulus must also be prefixed or suffixed, as added-a。If the master model leaves the original department and goes to another department，A prefix or suffix should also be added if the process department can be added-prc。Any violation of the named file should be documented for individual users，In the enterprise
2015-02-13 Reading quantity 2784
introduction： 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。]Comparison of old and new models Aligning ball bearings Self-aligning roller bearings
2015-02-13 Reading quantity 1451
introduction：Shanghai Zhenwei reducer emphasizes under normal circumstances，For long continuous working reducer，Run on5000Change the oil every hour or once a year，A reducer that has been out of service for a long time，Before re-operation, the new oil reducer should also be replaced with the same oil as the original brand，Do not mix with different grades of oil，Oils of the same grade and different viscosities are allowed to be mixed。 When changing oil, wait until the reducer cools down and there is no danger of burning，But it should still be kept warm，Because after its completely cooled，The viscosity of oil increases，Drain difficulty。Look out：We need to cut the power to the transmission，Prevent unintentional power-on！ New entry into service
2015-02-13 Reading quantity 2793
introduction：Vacuum pump using water vapor jet to extract air，Jet pump。Jet pump features are:Start quickly，Wide working pressure range，High pumping capacity,It drains directly into the atmosphere，Simple structure，Reliable operation due to no moving components，Long service life。This kind of pump is suitable for removing dust、condensability、Corrosive and flammable and explosive gases。However, the steam and water consumption of this pump is larger，Low utilization rate，Therefore, it is suitable for cheap by-product steam or available residual steam、The occasion of waste steam。Jet pumps have been widely used in vacuum smelting、Vacuum degassing、Vacuum concentration、Vacuum drying、Vacuum distillation、Vacuum refrigeration and vacuum transportation。Water vapor jet really
2015-02-13 Reading quantity 2795
introduction： 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 sound of rotation is examined with a stethoscope，There is a strong metal noise、Abnormal sound、Irregular sounds indicate anomalies。The cause is poor lubrication、Poor shaft or bearing seat accuracy、Bearing damage、Foreign body intrusion。 Diverging greases that form a profile in a rolling bearing are diverging
2015-02-13 Reading quantity 1568
introduction： Standard number Standard content remark GB/T3098.1-2000Fasteners mechanical properties bolts、Screws and studsISO898-1：1999 GB/T3098.2-
2015-02-13 Reading quantity 2927
introduction：The reducer series represented by the planetary reducer plays an important role in the mechanical device，According to the general staff summary，The main role can be divided into the following5Kind of: 1)Change the output speed of the engine(retard、Speed up or speed change)，To suit the work needs of the working organization 2)Change the torque of the engine output，To meet the requirements of the working organization 3)The motion form of the output of the power machine is transformed into the motion form required by the working mechanism〔If the rotating motion is changed to a linear motion，Or vice versa) 4)Transfer the mechanical energy of a power engine
2015-02-13 Reading quantity 2929
introduction：The hot assembly of couplings is often used in large motors、Installation of heavy equipment such as compressors and rolling mills，Because the coupling and shaft in such equipment are usually connected together by interference fit。 The assembly method of interference coupling is：Press-in assembly、Low temperature cold assembly and hot sleeve assembly and so on。 At the installation site，The hot sleeve assembly method is mainly used，Because this assembly method is relatively simple，Can be used for large diameters(D >1000mm)And the amount of interference is large)Part of。 Push-in assembly method is mostly used for light and medium static fit，And mechanical equipment such as presses are needed，Therefore, it is generally only collected in the factory
2015-02-13 Reading quantity 1513
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