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introduction：cheliang zhuanxiang jigou Vehicle steering mechanism steering mechanism of motorvehicle A mechanism used to control the direction of travel of various wheeled or tracked vehicles。The steering mechanism of wheeled vehicles is generally composed of steering gear and steering rod system。When using power steering，A hydraulic pump is also required、Operating valve、Function tank and oil storage tank，Collectively called hydraulic booster mechanism。 Steering mode The steering mechanism of wheeled vehicles has shaft steering、Wheel steering and articulated steering 3
2015-01-25 Reading quantity 2789
introduction：Abstract：In this paper, the main research directions of numerical simulation of sheet metal forming are discussed：Finite element algorithm、Contact and friction、Forming limit diagram、The research status of defects and so on is introduced，The future research direction of sheet metal forming numerical simulation is also discussed。 keyword：Finite element algorithm；Contact and friction；Forming limit diagram；defect 1 introduction Sheet forming is an important branch of material processing forming，It is widely used in automobiles、spaceflight、aviation、Home appliances and other departments。With the development of modern industry，Sheet metal forming parts are becoming more and more complex，People are concerned about the quality and shape of sheet metal
2015-01-25 Reading quantity 2907
introduction： Example of hot runner system application：(Apply to syringes、Bottle caps、Washing machine mold) Principle of hot runner system: Install a hot nozzle and a hot runner plate in the injection mold,Using the principle of heat,The plastic can be kept molten after it comes out of the injection molding machine barrel,The water level of the product is the same as the nozzle of the injection molding machine,So the finished product
2015-01-25 Reading quantity 2880
introduction：Abstract：40CrSurface laser claddingCoThe baseWCceramic，CoBase after self-fusion，A metallurgical transition layer is formed between the matrix and the cladding layer。This paper adoptsSEM、TEM、XThe structures of the two cladding layers were analyzed by X-ray energy spectrometer and microhardness tester、ingredient、Microstructure and hardness gradient of the interface。 keyword：Laser cladding layer waveform interface hardness gradient introduction Laser cladding on metal surface of cermet is an effective means of surface modification。As an important component phase in cermet，WCBecause of its excellent high temperature strength，Strong oxidation resistance、High hardness、Good wear and corrosion resistance
2015-01-25 Reading quantity 2912
introduction： 1、 appearance It should be clear and transparent，Free of suspended solids and bottom sediments，They are usually pale yellow。 2、 density The density is related to both the composition of the oil and the amount of water present。For insulating oil, controlling its density in a sense also controls the amount of water present in the oil，In particular, it is more practical to prevent the phenomenon of floating ice from appearing in the transformer working in the cold area during the temporary shutdown period in winter。If there is too much water in the insulating oil, ice will crystallize on the electrode at low temperatures，But when the temperature gets high，Ice crystals stick to the electrodes and melt
2015-01-25 Reading quantity 2890
introduction： one．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。]： (one)General introduction to rolling bearings 1.Rolling bearingrollingbearing Bearings that move in rolling motion between supporting loads and parts that move relative to each other
2015-01-25 Reading quantity 1552
introduction：In an automatic control system, the detection signal representing the actual value of the controlled object is compared with the given value，An industrial automation instrument that determines errors and issues control instructions according to predetermined rules。The main body of the instrument is the regulator，It controls the action of the actuator，Make the temperature in the production process、The pressure and flow rate are adjusted to meet the process requirements。figure[Adjust the relationship between the instrument and other instruments]To regulate the interrelationship between the instrument and other instruments。The regulating instrument generally has a given、Compare、indicate、Arithmetic and operation and other functions。Regulating instruments for complex systems also have the ability to calculate and select and memorize several input signals、Amplitude limiting、cheng
2015-01-25 Reading quantity 2793
introduction：Digital program control machine tools are generally referred to as numerical control machine tools。It is an automatic machine tool controlled by a numerical control device or a computer，It integrates automatic control technology、Computer technology、Precision measurement technique、Hydraulic pneumatics and other technologies。And in the machine structure and other aspects of the use of the latest technology。 With the development of science and technology，The shape and structure of mechanical products are constantly improved，The processing quality requirements for mechanical parts are also getting higher and higher；singleton、The proportion of mechanical products produced in small batches is increasing，Especially in shipbuilding、aviation、spaceflight、Deep diving and all sectors of the defense industry，Small processing batch、
2015-01-25 Reading quantity 2897
introduction：The basic principle of bending die（one） one、The basic principle of bending （one） The concept of bending process and bending parts 1． Bending process：According to the shape of the part，The blank is bent at an Angle by the die and press，Stamping process method of workpiece with certain shape。 2． Application of bending forming process in industrial production：Quite widely used，Such as a lot of covers on the car，Cabinet frame for a car，Handle on the motorcycle，Foot support，The support structure on the bike，handle，Small as a doorknob，clamp（cramp）Etc.。 （two）、The basic principle of bending：In order toVShaped sheet metal bending pieces
2015-01-25 Reading quantity 2906
introduction： Select the elements of the electromagnetic clutch Electromagnetic clutch selection is not a small problem，When it comes to its selection problem, it is not because of the simple understanding of the structural composition and working principle of the electromagnetic clutch，When it comes to electromagnetic clutch selection problems are not small，Is related to the size of the electromagnetic clutch、Installation and the suitability of torque。The electromagnetic clutch is divided into two working modes: power off and power on，Installation methods are also divided into hanging type and four-hole fixed，Sometimes it depends on the actual situation or the needs of the user。Electromagnetic clutch manufacturers or
2015-01-25 Reading quantity 2894
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