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introduction：The gate is the connection between the runner and the cavity，It is also the final part of the injection mold feed system，Its basic function is： 1、 Make the molten plastic from the flow path enter the filling cavity at the fastest speed。 2、 After the cavity is filled，The gate can be quickly cooled and closed，Prevent the return of uncooled plastic in the cavity。 The design of the gate and the dimensions of the plastic parts、Shape mold structure,The injection process conditions and the properties of plastic parts are related.But according to the basic function of the above two sentences,Small gate section,Keep the length short,Because only in this way can we meet the increasing flow speed,Rapid cooling closure,Easy to separate plastic parts and gate residue marks
2015-03-18 Reading quantity 2909
introduction： 1）Inspection of forging blanks First understand the material of the blank before processing、Forged condition（Generally, it is in a positive tempering state，Check the forging certificate is the material book）。Secondly, check whether the blank is laminated、Cracks and other defects。 Measure blank shape dimensions。Measure blank inside and outside diameter、Height dimension、Calculate machining allowance，The number of dividing tool in turning process is estimated more accurately。 2)Turning process 2.1 Rough turning：Rough turning according to the turning drawings，Cutting speed、The cutting quantity shall be carried out in strict accordance with the process regulations（The general cutting speed is5turn/minutes。Cutting quantity is1
2015-03-18 Reading quantity 1534
introduction： Nylon cages are 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。]One that uses comparison，Nylon cages mainly prevent corrosion ability in special industrial varieties greatly used，therefore，Nylon cage material is special，It is mainly made by injection molding of special materials imported from abroad，Common material components are：Glass fiber reinforced
2015-03-18 Reading quantity 1449
introduction： Made of abrasives, etc、Small diameter consolidated abrasives for use with handles。The grinding head is rotated at high speed on a machine tool or hand-held tool，Mainly used for grinding the inside and outside profile of the profile，Such as grinding all kinds of die。Cylindrical grinding heads can be used to grind inner holes。 Depending on the structure and manufacturing method，There are two types of grinding head：①Abrasives and binders are mixed、Pressing and sintering（Or harden）Grinding head，It has a blind hole at the end，Then install a steel handle on the blind hole and use it。This grinding head presses its head
2015-03-18 Reading quantity 2767
introduction：electrochemistry、Special processing of cutting metal materials by the combined action of electric heating and mechanical force。Anode mechanical cutting method is the Soviet people in20century40epochal。figure[Anode mechanical cutting schematic]The principle of anode mechanical cutting。Using metal steel bands or disks as cutting tools（Material is carbon steel or brass），It is connected to the negative terminal of the DC power supply as a cathode。The workpiece to be cut acts as the anode，Connected to the positive terminal of the DC power supply。Supply water glass at the incision during cutting(Sodium silicate)electrolyte。High-speed rotating cutting tool tangential workpiece。Under the action of DC power supply，The metal on the cut surface of the workpiece is oxidized by electrolysis
2015-03-18 Reading quantity 2772
introduction：Function description： Power generation enterprise management information system(DCMIS) Power plant management information system(DCMIS)The software is developed by Shenyang Dongda Alpai Software Co., LTD。The software is based on a detailed and comprehensive investigation and analysis of more than ten hydropower and thermal power plants in China，It was developed by software designers and developers at Dongda Alpai after long and hard work，coexistenceISO 9000Extremely rigorous testing is carried out under the quality certification system。 Power plant management information system(DCMIS)The software mainly includes personnel management subsystem，
2015-03-18 Reading quantity 2877
introduction： A conveyor designed to carry people continuously between floors of a building。Compared with the elevator, the escalator has a large conveying capacity﹐It can carry passengers continuously﹐It can also be used for ordinary stairs when the power is off﹐The downside is you cant do it halfway﹑servant﹐The cost and footprint is large。Escalators are mainly used in shopping malls﹑station﹑quay﹑Places where people are concentrated, such as airports and subways。(See color diagram Beijing Railway station escalator ) The Paris International Exposition is held in1900One on display this year“A moving ladder in the shape of a ladder”﹐It is the prototype of the modern escalator。later﹐Escalators have developed rapidly in various countries。Chinese Yu19
2015-03-18 Reading quantity 2780
introduction： Selective 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。]Clearance time，The following aspects should be considered： 1、Working conditions of bearings，Like load、temperature、Speed dispatch； 2、Requirements for bearing performance(Rotation accuracy、Friction moment、Vibration、noise)； 3、
2015-03-18 Reading quantity 1516
introduction： Servo drive computer control system CNC control software one、The composition of computer numerical control system and the function of each part For CNC machine tools，Its control content mainly includes： (1)Functional control：Automatic reading of control information，Make the numerical control system establish the corresponding working state，Thus control the corresponding action of the machine tool。Like lubrication、Coolant supply、Spindle motor on and off、Speed regulation，And coordinate axis function control。 (2)Position control：Control the position or trajectory of the tool relative to the workpiece。Feed servo control system
2015-03-18 Reading quantity 2893
introduction： 1.definition：Use sand belt，The method of machining the workpiece in the corresponding contact mode according to the processing requirements is called abrasive belt grinding。It is a new process method。 2.Sand belt production characteristics： Most of the abrasives used in the belt are selected needle-like abrasive particles，The electrostatic sand planting process is applied，Make the abrasive particles stand upright on the sand belt matrix and the edge upward，Aligned neatly and evenly，Therefore, the abrasive particles have good isometric properties，The space between abrasive particles is large，Small contact area between abrasive particle and workpiece，And all abrasive particles can be cut。 3.Abrasive belt grinding characteristics：High efficiency、Low grinding heat，Heat dissipation
2015-03-18 Reading quantity 1442
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