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introduction： Numerical control technology is a technology that uses digital information to control mechanical motion and working process，Numerical control equipment is a mechanical and electrical integration product formed by the penetration of new technology represented by numerical control technology into traditional manufacturing industry and emerging manufacturing industry，The so-called digital equipment，Its technical scope covers many fields：(1)Machinery manufacturing technology；(2)Information processing、process、Transmission technology；(3)Automatic control technology；(4)Servo drive technology；(5)Sensor technology；(6)Software technology。 1 The development trend of numerical control technology The application of numerical control technology not only brings to the traditional manufacturing industry
2015-03-23 Reading quantity 2905
introduction：F Fahrenheit Fahrenheit(temperature) F *Front *Fiele *Force *Farad *Full *Finish *Fine *before *Magnetic field *force *farad* topful *process *precision F/A Fuel-Air Ratio Fuel air mix ratio F/B Feedback feedback,feedback F/B Fuse Block Fuse box F/F Front Engine/Front Wheel Dr
2015-03-23 Reading quantity 2861
introduction： brand designation Chemical composition（The surplus is copper）（Mass fraction）（）tin phosphorus zinc lead impurity≤4-3Tin bronze 4-4-2.5Tin bronze 4-4-4Tin bronze 6.5-0.1Tin bronze 6.5-0.4Tin bronze 7-0.2Tin bronze4-0.3Tin bronze QSn4-3 QSn4-4-2.5 QSn4-4-4 QSn6.5-0.1 QSn6.5-0.4 QSn7-0.2 QSn4-0.3 3.5～4.0 3
2015-03-23 Reading quantity 2779
introduction：pick to：Deep drawing is the stamping process of using a deep drawing die to turn a flat material into an open hollow part，It is a typical deformation process。In this paper, the slip state and stress of stainless steel drawing parts in the forming process are studied、Strain analysis，The origin of surface scratches during the forming of stainless steel drawing parts is revealed，Then the basic method of surface protection is put forward。 keyword：Deep drawing；Drawing coefficient；scratch；slip With the continuous improvement of peoples living standards，Stainless steel products due to their unique corrosion resistance，The characteristics of not easy to rust are more and more favored by many consumers。But we also found in many stainless steel products
2015-03-23 Reading quantity 2860
introduction：Because fatigue fracture usually occurs from the weakest part of the machine or the stress concentration caused by external defects，Fatigue fracture is therefore sensitive to many factors，Such as，Cyclic stress characteristic、Environmental medium、temperature、The surface state of the machine、Internal organizational defects, etc，These factors lead to the generation of fatigue cracks or rapid crack propagation and reduce the fatigue life。 In order to improve the fatigue resistance of machine parts，Prevent the occurrence of fatigue fracture accidents，In the design and processing of mechanical parts，A reasonable structure shape should be selected，Prevent surface damage，Avoid stress concentration。Because the metal surface is the place where fatigue cracks are easy to occur，And the actual part
2015-03-23 Reading quantity 1426
introduction：A discipline that studies various physical phenomena and their internal relations between abrasive tools and workpieces in the grinding process。The research content of grinding principle mainly includes the formation process of grinding chips、Grinding force and grinding power、Grinding heat and grinding temperature、Grinding accuracy and surface quality、Grinding efficiency，The aim is to gain an in-depth understanding of the nature of grinding，And to improve or create grinding methods。 The research of grinding principle begins1886years，ColumbianC.H.NORTON sumC.Allen collaborates on grinding wheels and grinding processes，20After the development of the correct choice of grinding wheel type and grinding wheel speed principles；At the same time, it is found that in order to improve grinding efficiency and precision
2015-03-23 Reading quantity 2782
introduction：1．Influence of stamping process and die design and measures to improve die life。 (1)The effect of raw materials for cold stamping。Such as：Raw material thickness tolerance does not meet the requirements、Material property fluctuation、Poor surface quality and unclean etc A.The grade of raw materials should be used before stamping、thickness、The surface quality is strictly checked B.Ensure material surface quality and cleanliness (2)Effect of layout and welt Layout method and edge value have great influence on die life，The unnecessary reciprocating feeding and layout method and too small edge value are often the important reasons for the sharp wear of the die and the gnawing of the die。
2015-03-23 Reading quantity 1519
introduction：one、Application of frequency converter in constant pressure water supply automatic control system Variable frequency speed regulation constant pressure water supply equipment to save energy、secure、High quality water supply quality and other advantages，Make the technical equipment level of the water supply industry from90The beginning of the decade began to experience a leap。Constant pressure water supply speed control system realizes stepless speed control of pump motor，Automatically adjust the operating parameters of the system according to the change of water consumption，The operating parameters of the system are automatically adjusted during changes in water consumption，Maintain constant water pressure to meet water requirements as water consumption changes，Its the most advanced today、Reasonable energy-saving water supply system。 Variable frequency constant pressure water supply automatic control system
2015-03-23 Reading quantity 2895
introduction：Injection molding machine is the main equipment of injection molding，The technical parameters and properties of injection molding machines are closely related to the properties of plastics and injection molding processes。The further improvement and development of injection molding equipment will certainly promote the progress of injection molding technology，Create conditions for the development and application of injection molded products。With the development of plastics and molding processes，Injection molding machines have increased greatly in terms of output and variety。From the worlds main producer of plastic machinery United States、DE、day、For the purpose of...，The output of injection molding machine is increasing year by year，And occupies a large proportion in the whole plastic machinery。Development and application of new types of machines and plastics to injection molding machines
2015-03-23 Reading quantity 2775
introduction：for：Planet gear,Sun wheel,Outer gear ring. The main transmission structure of the speed machine and the use of the planetary reducer For structural reasons,The single-stage reduction of the planetary reducer is minimum3,The maximum generally does not exceed10,Common deceleration ratio is:3.4.5.6.8.10,Reducer series generally do not exceed3,But there are parts of large reduction than custom reducers have4Stage reduction. Unlike other reducers, planetary reducers have high rigidity,High precision(A single stage can do it1Within points),High transmission efficiency(Single-stage in97%-98%),High torque/Volume ratio,Lifetime maintenance free, etc
2015-03-23 Reading quantity 2901
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