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introduction：one、Working principle and classification of punches 1、The working principle of the punch： The design principle of the punch is to convert circular motion into linear motion。It is powered by the main motor,Driving flywheel,Drive the gear through the clutch、Crank shaft（Or eccentric gear）、Parallel operation of connecting rod,To achieve a straight line motion of the slider,The motion from the main motor to the connecting rod is circular。The connecting rod and the slider need to have a circular movement and a linear movement of the transfer point,There are roughly two kinds of mechanisms in its design,One is spherical,One is pin type（cylinder） ,Through this mechanism, the circular motion is converted into the linear motion of the slider。 The press applies pressure to the material,
2015-02-19 Reading quantity 1453
introduction：1：First of all, we need to understand that there are several types of field system interference？Why interfere?？How to solve it？ 1）Terrestrial circulation interference Various automatic instruments are needed to realize monitoring and control in industrial production processes、Control systems and actuators,The signal transmission between them ranges from weak to millivolts、A small signal on the milliamp scale;Tens of volts,Even thousands of volts、Large signal of hundreds of amperes;Both low frequency DC signal,There are also high frequency pulse signals and so on,After constructing the system, it is often found that the transmission between the instrument and the equipment interferes with each other,Cause system instability and even misoperation.This happens except for every meter、set
2015-02-19 Reading quantity 2886
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 life of Life of rolling bearing，Refers to the fatigue life of the bearing。As far as batch bearings are concerned，The life span is discrete，But the life distribution follows the parameter Weibull distribution。the90％The life that the bearing can achieve is defined as the bearing life，It can also be considered that the reliability of the bearing is
2015-02-19 Reading quantity 1561
introduction： 1 GB/T 967-1994 Nut tap Nut taps 2 GB/T 968-1994 Tap thread tolerance Manufacturing tolerances on the threaded portion of taps 3 GB/T 969-1994 Tap technical conditions Technical specification for taps 4 GB/T 970.1-1994 Circular die Type sum
2015-02-19 Reading quantity 2874
introduction：forty-one：A cylinder is truncated by a plane，Its intersecting lines are two parallel lines，What about the truncated plane and the cylindrical state line？ a：parallel。 forty-two：What workpiece is electroslag welding generally used to weld？ a：Thick wall workpiece。 forty-three：What method is used to check the surface crack of the workpiece？ a：Magnetic particle detection。 forty-four：What is the mounting surface on which a datum is selected to support the assembled metal structure？ a：Prop up forty-five：Currently large and complex structural parts are manufactured，What methods are commonly used？ a：Component assembly method。 forty-six：Required for assembly operation
2015-02-19 Reading quantity 2890
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。]Is a variety of mechanical rotation shaft or movable parts of the support，Widely used in agricultural vehicles、tractor、Diesel engine、motor、Thresher and other agricultural machinery。Common bearing code for selected bearings，But the bearing code is more complicated，If the agricultural machine master the law of recognizing the bearing code，Shopping is easy
2015-02-19 Reading quantity 1441
introduction：Tube temperature refers to setting precautions： 1、Is to keep in the material tube and screw Melt of chilled resin inside the rod，The rotation of the Eli screw。 2、Glue temperature=Pipe temperature+Mechanical heat energy Therefore, the temperature of the material tube should be set lower than the temperature that the material can withstand。 3、Tube temperature setting is usually divided into 4 Segment control(Bigger machines more)，It is best to fit the feed section of the screw、pressure Shrink section and metering section，In addition, the nozzle is provided with different temperature setting control，Because the melt temperature is the absolute condition，And the tube temperature is relative。Therefore, the tube temperature should be set according to the condition of the material flow
2015-02-19 Reading quantity 2805
introduction： No direct human involvement is required﹐And by mechanical equipment﹑Instruments and automation devices to complete all or part of the product processing of the production process。The scope of production automation is very wide﹐Including process automation﹑Automation of material storage and delivery﹑Product inspection automation﹑Assembly automation and automation of product design and production management information processing。Under the conditions of production automation﹐The human function is mainly system design﹑assemble﹑adjust﹑inspect﹑Supervise the production process﹑Quality control and adjustment and overhaul of automation equipment and devices。The machinery industry belongs to discontinuous production﹐Chemical and chemical industry﹑metallurgy﹑Light industry and other continuous process students
2015-02-19 Reading quantity 2790
introduction： (1) Basic answer：Take equipment, for example。Such as：Equipment power is100unit，That is to say，There are100Each unit of power is transferred to the device。however，Because most electrical systems have inherent reactive power loss，Can only use70One unit of power。unfortunately，Although only use70unit，Have to pay100The cost per unit。In this case，The power factor is0.7 (If the power factor of most equipment is less than0.9when，Will be fined)，This reactive power loss mainly exists in the motor equipment(blower-like、Water pump、compressors)，Also known as inductive load
2015-02-19 Reading quantity 2914
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。]There are many reasons for failure，All factors affecting the design and manufacturing process are related to the failure of bearings，Analysis is not easy to judge。In general，In general, it can be considered and analyzed from the two aspects of use factors and internal factors。 The use factor mainly refers to the installation adjustment、Service and maintenance、d
2015-02-19 Reading quantity 1570
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