焊机_百度百科（Welding machine _ baidu encyclopedia）

焊机_百度百科（Welding machine _ baidu encyclopedia） 焊机_百度百科(Welding machine _ baidu encyclopedia) Welder _ baidu.com baidu homepage | login news page post to know MP3 picture video encyclopedia library Help to set up the 5th anniversary of the core user of economic science and technology sports core users of the natural cultural geographic history of life Definition of technical terms for disjointing articles Name: welding machine English name: welding machine definition: it can provide the necessary energy and movement to complete the welding process, including the welding wire and/or welding torch movement and control system equipment. Applied discipline: mechanical engineering (first-level discipline); Welding and cutting (secondary disciplines); The contents of welding and cutting process equipment and equipment (tertiary subjects) shall be published by the national committee for scientific and technical terms Encyclopedia card Welding is to provide a certain characteristics of the power supply of electric welding, welding because of simple flexible solid and reliable, even with the parent metal after welding the advantages of wide spent equal strength used in various industrial fields, such as aerospace, ships, vehicles, containers, etc. directory Introduction to the Introduction to classified cold welding repair machine Features of repair and repair of cold welding machine Characteristics of the advantages disadvantages Auxiliary appliance The development trend is efficient and energy-saving Welding performance stability Implementation centralized control Six values of value Classification and working principle of electric welding machine Introduction to the Introduction to classified cold welding repair machine Features of repair and repair of cold welding machine Characteristics of the advantages disadvantages Auxiliary appliance The development trend is efficient and energy-saving Welding performance stability Implementation centralized control Six values of value Classification and working principle of electric welding machine Expansion cold welder Edit this paragraph Electric welding machine Machine) is actually the loss characteristics of transformer, the 220 v and 380 v alternating current into a low voltage direct current (dc), welding machine generally according to the output power types can be divided into two kinds, one kind is ac power; One is direct current. Dc arc welding machine can say is a high power rectifier, points are negative, ac input, after a transformer transformer, again by the rectifier rectifier, then output the loss characteristics of power, output voltage change will have a huge when on and off, the poles in instantaneous short circuit arc ignition, arc generated by using to consumable electrode and welding material, then reach the purpose of them combined with cooling. The welding transformer has its own characteristics, and the external characteristic is the characteristic that the voltage drops sharply after the electrode is ignited. Edit this section 1. Aluminum defect repair machine 2. Mould repair machine 3. Electric spark welding machine 4. High energy microarc cold welding machine 5. Cold welding repair machine Introduction to cold welding repair machine Scope: 1. The cold welding repair machine cold welding repair machine is casting pinhole, sand holes, porosity, crack, bruising, scratches, pits and small defects such as mechanical wear, mould wear on the surface of the professional precision repair welding equipment. It is widely used in mould industry, foundry industry, electric appliance manufacturing, medical equipment, automobile, shipbuilding, boiler, construction, bridge construction and other industries. 2. Cold welding repair machine applicable material: cold welding repair machine adopts the ordinary wire as a filling material made of: objects gray iron, ductile iron, stainless steel, carbon steel, steel, aluminum, aluminum alloy, copper etc. As long as it is all can repair of conductive metal. Features of repair and repair of cold welding machine (1) low thermal temperature weld repairs, substrate no fever, do not produce thermal deformation, weld microstructure near the same, no stress, no cracks, no hard point hardening phenomenon, does not affect the machining performance. (2) simple operation and multi-purpose. In addition to the repair function of surfacing welding, it can also be used to strengthen the surface coating of tungsten carbide. (3) the argon is highly protected, the welding strength is high, the metallurgical combination is combined with the solidification of the material and the substrate at the same time, the combination is strong, dense and not falling off. After welding, can carry on the car, milling, planing, grinding and other mechanical processing. (4) the welding wire source is wide, economical and practical, the whole machine 30KG, can be repaired online. (5) rotary self-loss electrode deposited surfacing, easy operation and high efficiency. (6) environmental pollution free. No harmful gas generation, can be directly grasped, eyes, welding position is accurate, welding filling point is small, after welding is small. (7) the welding process is the repeated melting of the high frequency welding filling point, no matter the size of the defect, so long as it can be touched by the tip of the pen. (8) pure metal repair, no weld repair marks, and the welding effect meets the quality inspection standard. Edit this section feature advantages Welding machine with electric energy, electricity instantly converted into heat energy, electricity is very common, electric welding machine is suitable for work in a dry environment, do not need too many requirements, due to the small size, simple operation, easy to use, fast, after welding seam strong advantages such as wide spent used in various fields, especially for demanding high strength parts, practical, can instantly to the same metal materials (also can connect the dissimilar metals, just different welding method) permanent connections, weld after heat treatment, and the parent metal the same strength, sealing is good, this to the storage of gas and liquid container manufacturing solved the problem of the sealing and strength. disadvantages Welding machine in the process of using welding machine will produce a magnetic field around, arc combustion would produce radiation into the surrounding, arc of infrared, ultraviolet light, such as and harmful material such as metal steam and smoke, so operation must do enough protective measures. Welding is not suitable for high carbon steel welding, such as welding weld metal crystallization and segregation and oxidation process, for high carbon steel welding performance is bad, easy to crack, after welding hot crack and cold crack. The welding of low carbon steel with good performance, but also in the process of operation is proper, the descaling clean relatively cumbersome, sometimes weld porosity bite edge defects such as slag inclusion cracking, but the operating properly can reduce the generation of defects. Edit this section of accessories Welding machine accessories Including prevent operators are welding arc or other energy produced by ultraviolet light, infrared gas welding or other radiation damage eyes glasses, protect welding arc welding eyes, face and neck mask, white overalls, welder gloves and upright protector etc. Edit the development trend High efficiency and energy saving The energy saving of the welder is reflected in the two aspects of the time of the load and the time of the load. In the no-load time, the welding machine can put the main circuit and fan into the stop state, and the power consumption is only a few watts. The efficiency of the welding machine is higher than that of the thyristor. Related parameters according to the statistics, in 2008 the demand for 890000 sets of dc welder welding industry, if all adopt the electric welding machine, can be directly to save 43000 tons of copper, steel, 64000 tons, save electricity 680 million KW. H, indirect saving coal 566500 tons, 10.34 million tons of water, reduce CO2 emissions by 1.1445 million tons. Thus it can be seen that it is of great economic and social benefit to promote the welder. Welding performance stability Because the electric welding machine has more than 20KHZ working frequency, it has a fast response speed, and can control the droplet transition into multiple stages. For CO2 gas shielded arc welding, can significantly reduce the splash, polar melting of pulse, MIG/MAG welding can effectively control the stability of the spray transfer, you can also drop transition and wire feeding mechanism, further control of molten drops transfer process, get good weld forming and welding performance is stable. These are all traditional rectifier welders can't do. Implementation centralized control The welder USES single chip microcomputer, DSP, FPGA and other digital controllers, and realizes network communication between multiple welder or upper computer and welding machine through Ethernet and field bus. Not only solve the problem more collaborative welding machine, easy centralized control of welding process, and realizes the remote parameter setting and monitoring of the welding machine, electric welding machine remote fault diagnosis and maintenance is possible. Edit the value of this section Six big value 1. Reasonable design and free adjustment. Different frequency of discharge can be selected according to different metal materials to achieve the best repair effect. 2. The thermal influence area is small. No heat input in the instantaneous process of the heap, thus no deformation, bite and residual stress. There will not be partial annealing. No heat treatment will be required after repair. 3. Minimal welding shock In the welding process, this welder overcomes the effect of the ordinary argon arc welding on the periphery of the workpiece. The machining surface of the workpiece without waste can also be repaired. 4. High repair accuracy: the thickness of the surfacing welding is from a few microns to a few millimeters, just grinding and polishing. 5. Strong fusion strength: because of the full penetration into the workpiece surface materials produce a strong binding force. 6. Loop precise control is adopted. Classification and working principle of electric welding machine The welding current is divided into three types: dc, ac, and pulse, but the commonly used is ac and dc inverter welder. Ac welder is a special transformer, but dc inverter welder is more complicated and its control mode is present Basically adopt frequency conversion. The main parts of the welder are a step-down transformer, as shown in figure 1. The two terminals of the secondary coil are welds and welding rods, which ignite the arc at work and melt the welding rod in the high temperature of the arc Connect to the gaps in the workpiece. Because the iron core of the transformer has its own characteristics, it has the characteristic of the sharp drop of the voltage, that is, the voltage drop after the welding electrode is ignited; When the electrode is stuck to a short circuit, the voltage drops sharply. In the welding operation, although the current in the circuit is the same everywhere, but because of different resistance, the resistance of the non-fixed contact is the largest (the resistance is called the contact resistance), according to the electricity The heating effect of the flow law (also called bajaur law), that is the Q = 12 p. t know: when the current is equal, the higher is the greater part of the electrical resistance heating, so the welding joint, electrode contact is being answered the king The contact resistance of the body is the largest, and the electric heat generated in this part is the most natural, and the welding electrode is the alloy with low melting point, which is naturally easy to melt. The melted alloy electrode is bonded to the welding material, and then the welding is cooled The recipients are glued together. General dc inverter welder panel has output dc current adjusting knob. The inverter direct current welder is the single-phase alternating current 220V voltage or three-phase ac 380v voltage Line bridge rectifier, filter, then supply power switch device for reverse processing. A small number of inverter welder USES 555 time base circuit and other pulse generation circuit to generate the rectangular pulse wave, and the triode is used to carry out the electricity transport Large, then the voltage amplification with a pair of complementary field effector is used to generate the high frequency signal, and finally the booster transformer is used to boost the voltage, and the induction ac power is obtained on the secondary windings. The size of its power depends on the amplification of the amplifying circuit. The current inverter welder adopts IGBT tube to form a straight and active inverter circuit, and its control system adopts the pulse width modulation chip SG3525, and its inverter frequency is 20kHz, and can be Constant flow external control. System in the light, because the voltage feedback control, PWM output pulse modulator continuously, because of the intermittent oscillation of vibration frequency is low and narrow pulse width, the no-load loss is small, but not and transformer is not easy to fill And. Because this kind of welding machine adopts the control technology with the pulse width modulation PWM as the core, it can obtain better constant current characteristics and excellent welder effect. More picture books Extended reading: 1 www.cut365.cn2 Open classification at www.weldec.com: Mechanical engineering, welder, welding and cutting, welding and cutting process equipment and equipment, welding online I will complete the relevant entry of welder: Welding automatic resistance welding machine for welding machine press welding machine Welding automatic resistance welding machine for welding machine press welding machine The contents of baidu encyclopedia are for reference only. If you need to solve specific problems (especially in the fields of law, medicine, etc.), you are advised to consult relevant field professionals. This entry has helped me to add to the search and share: co-editor Tianfu drunken snow, encyclopedia ROBOT, shijie220, dou's family, CNZZJW, xulafeng85, people welding more If you think this entry needs to be further improved, you are welcome to participate in the edit entry before you start editing, so you can learn how to edit the entry If you want to make a complaint, please go to baidu baike complaint center. If you want to make comments and Suggestions, Please go to baidu baike. 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