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introduction：Plastic molding properties Chapter 1 Plastic formability Plastic is the main component of high molecular weight synthetic resin，Under certain conditions（Such as temperature、Pressure etc）A material that can be molded into a certain shape and retains its shape at room temperature。 The properties of plastics according to the surface after heating，Can be divided into thermosetting plastics and thermoplastic plastics two categories。The former is characterized by a certain temperature，After a certain amount of time heating、After pressurizing or adding hardener，It hardens by chemical reaction。The chemical structure of the hardened plastic changes、Hard texture、Insoluble in solvent、Heat no longer softens，If the temperature is too high, it will decompose。The latter is characterized by receiving
2015-02-09 Reading quantity 2806
introduction：In the reducer family，The planetary reducer is known for its small size，High transmission efficiency，Wide deceleration range，High precision has many advantages，It is widely used in servo、step-by-step、Dc and other transmission systems。Its role is to ensure the premise of precision transmission，It is mainly used to reduce speed, increase torque and reduce load/The moment of inertia ratio of the motor。In order to better help the majority of users with a good planetary reducer，In this paper, the causes of shaft breakage of reducer and drive motor are analyzed，And introduced in detail how to install the planetary reducer correctly。 one Broken axis problem in different hearts Some users drive after the device runs for several months
2015-02-09 Reading quantity 2807
introduction：belowNMRVWorm gear The constitution of worm reducer、Description of performance parameters、Usage matters are provided by Dongguan Taiji Reducer Company，For information purposes only。 NMRVWorm gear reducer is an aluminum alloy worm gear reducer，Its main components are as follows： The main components of the aluminum alloy worm gear reducer are oil seals、Oil plug、Worm gear case、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，Bring down
2015-02-09 Reading quantity 2951
introduction：Peoples Republic of China machinery industry standard JB/T6643-93 1Subject content and scope of application This standard specifies the contact Angle as35oGeneral purpose four-point contact ball 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。]（d≤300mm）The value of axial clearance。{T
2015-02-09 Reading quantity 1466
introduction： In the past, truck gearboxes didnt have synchronizers，A two-foot clutch is required when shifting gears，Otherwise, only the gears are clattering and cannot be put into gear。What youre talking about，I have to add：Depress the clutch、Release the throttle、disengaging、Full release clutch、In the clutch、Engage a gear。This is a move from low to high gear，If you go from high to low，After releasing the first clutch, an empty throttle should be added，Step on the second clutch。As a result of：In the gearbox，Low hour，The diameter of the active intermediate shaft gear is smaller than that of the passive two-axis gear。uptime，Intermediate shaft gear diameter increased，Two-axis gear phase
2015-02-09 Reading quantity 2813
introduction：one.M50NiLbearing[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。]steel ，The high speed and high temperature of aeroengine have higher requirements for rolling bearings，M50NiLIn addition to the improvement of fracture toughness，Compared with other high temperature quenched bearing materials，The microstructure and fatigue strength are also good。One reason for this isM50iLNot in
2015-02-09 Reading quantity 1469
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。]In the process of use，There are many ways to cause rolling bearings to fail，And rolling bearings in daily use，There are three main types of failure that are most common：fatigued，Plastic deformation and abrasive wear，For these three types of rolling bearing failure forms are described in detail below。
2015-02-09 Reading quantity 1619
introduction：The first2The electrical maintenance technology of CNC machine tool is introduced(Up.) Kaipu Mechatronics Engineering Co., LTD(Peking100011)Liu Yinting Practice without theoretical guidance is blind practice，A theory without practice is an empty theory。 China is engaged in CNC machine tool electrical design、There are tens of thousands of engineers and technicians working on application and maintenance technology，However, due to the complexity of the technology、Diversity and variability as well as some objective environmental factors，In CNC machine tool electrical maintenance technology has not yet formed a mature set、A complete theoretical system。The rapid development of control theory and automation technology，Especially micro
2015-02-09 Reading quantity 2963
introduction： SKFbearing[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 surface is coated with anti-rust oil，You must wash it carefully with clean gasoline or kerosene，Then coated with clean high quality or high speed high temperature lubricating grease can be installed and used。The influence of cleanliness on bearing life and vibration noise is very large
2015-02-09 Reading quantity 1526
introduction： Product design process，After we finish the design drawings，One of the things I want to do most is to know how the things I design will look like in real life、The appearance and their own design ideas are consistent、Whether the structure design is reasonable and so on？ Hand plate manufacturing is produced in response to this demand。 Generally speaking，Hand plate is in the premise of not opening the mold，One or more based on product appearance drawings or structural drawings，A functional template used to check appearance or structural reasonableness。 Classification of hand plates The early hand was limited by various conditions，Mainly manifested in most of its work
2015-02-09 Reading quantity 2930
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