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introduction：Injection molding is an engineering technology，It is concerned with transforming plastics into useful products that retain their original properties。An important process condition for injection molding is the temperature that affects the plasticizing flow and cooling，Pressure and corresponding time of each action。 one、Temperature control 1、Barrel temperature：The temperature that needs to be controlled during the injection molding process is the temperature of the barrel，Nozzle temperature and mold temperature, etc。The temperature of the first two processes mainly affects the plasticization and flow of plastics，The latter temperature mainly affects the flow and cooling of plastics。Each type of plastic has a different flow temperature，Same kind of plastic，Due to different sources or brands，Its flow temperature and minute
2015-03-26 Reading quantity 2865
introduction：In recent years, our country vigorously promoted the development mode of energy saving，In terms of the current gear reducer market，Due to the low industry threshold，The quality of some small enterprises products has not improved，Dragging down the development of the entire industry，The transformation pressure of the industry has increased。Therefore, General Motors believes that steady progress at this stage is the key to the healthy development of the gear reducer industry。 As a gear reducer widely used in speed and torque conversion equipment，The development in recent years has made a new breakthrough。With the improvement of science and technology，Optimized stock、Control capacity、Energy saving has become the key to promoting industry transformation point。And the near stage state release
2015-03-26 Reading quantity 2799
introduction： Measurement of thread parameters in length measurement techniques。There are two methods of thread measurement: single measurement and comprehensive measurement。 Single measurement It is often used to measure the middle diameter of the thread﹑Parameters such as pitch and tooth half Angle。 Middle diameter measurement Commonly used cylindrical thread diameter measurement methods are﹕Measure with thread micrometer。the3Two cylinders of the same diameter──Three kinds of needles﹐Place in the thread groove(figure1 Measure the middle diameter by the three-pin method )﹐Then use a micrometer according to the accuracy requirements﹑Comparator or length measuring instrument(See length measuring machine)Measured value﹐compute
2015-03-26 Reading quantity 2789
introduction：one、Nature and classification of pressure processing 1.Definition of pressure machining Pressure machining is the use of metal plasticity，Under the action of external force, the metal billet produces plastic deformation in the expected direction，To get the desired shape、Methods of size and mechanical properties。 2.Characteristics of pressure processing Metal has good mechanical properties、High productivity、Economize metal，But the equipment is more expensive，The precision finish of the forging is not high enough。 3.Application of pressure processing Its in the metal industry、National defense industry、It is used in civil industry
2015-03-26 Reading quantity 2801
introduction：In the mechanical assembly process,The transfer of materials and assembly operations of base parts and assemblies may be partially or completely semi-automated or automated。The main purpose of mechanical assembly automation is：Ensure product quality and stability，Improve working conditions，Increase labor productivity，Reduce production costs。General requirements for assembly automation are：The production batch of the product is large；The automatic assembly process of product structure is good，If the assembly work has good separability，Easy part orientation、orientation，The connection between parts is often bonded and welded instead of threaded connection，Avoid using spacers and other adjusting parts；The use of automatic assembly should have a better economic effect
2015-03-26 Reading quantity 2786
introduction：This noise, though, is essentially caused by manufacturing errors，But actually still with the choice of lubricant、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。]Installation conditions、The shaft is related to the precision state of the bearing seat。This noise is divided into cage sound and vibration sound two types，It is described as follows： (1)Cage sound and its control method
2015-03-26 Reading quantity 1464
introduction：one、Pay attention to the brand of the second phone。Buy a used press，First of all, we must produce offset presses in the printing quality of the worlds companies、Good understanding of equipment performance and stability，Thats the basic premise。If the use of the new equipment is not long, ink bars or overprinting is not allowed to such or such printing failures，This type of machine cannot be included in the scope of purchase。 two、Find out the country or region where the second phone was originally used。This is one of the factors that determine the quality and price of the second phone。Same brand、Model number、Machines produced at the same time，Due to the technical quality of users using the machine、Maintenance level and workload of equipment
2015-03-26 Reading quantity 2807
introduction： Background of air source heat pump Tianjin air source heat pump foreground background。The first background is heating，The cooperation of Tianjin this year2008Olympic Games，Cooperate with blue Sky engineering，No more coal-fired boilers are allowed to be built inside the outer ring road；The second is that coal-fired boiler rooms with a capacity of less than ten tons within the outer ring line will gradually be demolished，Whats left inside the outer loop、Boiler room mainly burning coal，That is, the existing heating resources of the city，I am afraid that the recent two or three years can only meet the needs of new housing，That is to say, in the future, there are only two winter heating options for such public buildings：
2015-03-26 Reading quantity 2948
introduction：3D laser cutting has been used in automotive manufacturing、Aerospace and other fields are increasingly widely used。Today, 3D laser cutting processing is in the development of new products in automobiles，It has replaced the trimming die and punching die of the automobile covering parts，Becoming a car manufacturer shortens the development cycle、Reduce cost、A powerful tool for competitiveness。Perform 3D laser trimming，It is necessary to ensure that the laser beam moves along the edge of the workpiece，At the same time to ensure that the laser incidence direction and the workpiece surface perpendicular，It also requires the laser head to constantly adjust its posture。To realize 3D laser cutting automatic programming，It is necessary to automatically generate the boundary contour of the 3D workpiece and the normal of the contour line，
2015-03-26 Reading quantity 2961
introduction： (1)Design element Industrial modeling design is a new interdisciplinary subject，A multidisciplinary design method must be adopted，In order to obtain the optimal state solution of various components，Thats the ideal design。The factors that have a direct impact on industrial modeling design include people、Technical conditions and environmental aspects。 (2)Design program Modern industrial modeling design is purposeful and planned in order to develop，The whole design process sometimes intersects with each other，Sometimes there are cycles。The cycle is to constantly check whether each step of the work meets the requirements of the design。Industrial manufacturing
2015-03-26 Reading quantity 3005
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