Overview Special processing refers to those processing methods that are not in the traditional processing technology category. It is different from traditional processing methods that use tools, abrasives, etc. to directly remove excess material using mechanical energy. Special processing is a new process developed in recent decades. It is an important supplement and development of …
The processing technology The non-traditional machining technology is a method of directly processing various energy such as electric energy, light energy, chemical energy, electrochemical energy, acoustic energy, thermal energy and mechanical energy. The non-traditional machining tools are basically not in contact with the parts to be processed, and are not subject to the strength and …
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Electrical discharge machining is a special processing method for etching conductive materials by electro-erosion caused by pulse discharge between two electrodes immersed in working fluid. Also known as electrical discharge machining or electrolytic etching, referred to as EDM. In 1943, the Soviet scholar Lazarenko discovered and invented EDM, and then developed rapidly with the improvement …
Ultrasonic machining is a special processing that uses ultrasonic frequency as a tool for small amplitude vibration and slamming the surface of the workpiece by the slamming action of the abrasive which is free from the liquid between the workpiece, which is abbreviated as USM. Ultrasonic machining is commonly used for piercing, cutting, welding, nesting …
Laser cutting technology is widely used in the processing of metal and non-metal materials. It can greatly reduce the processing time, reduce the processing cost and improve the quality of the workpiece. Laser cutting is achieved by applying high power density energy generated by laser focusing. Compared with traditional sheet metal processing methods, laser cutting …
(1) Power density Power density is one of the most critical parameters in laser processing. With a higher power density, the surface layer can be heated to the boiling point in the microsecond time range, resulting in a large amount of vaporization. Therefore, high power density is advantageous for material removal processing such as punching, …
There are two main types of lasers used for welding, namely CO2 lasers and Nd:YAG lasers. Both the CO2 laser and the Nd:YAG laser are invisible to the naked eye. The light beam generated by the Nd: YAG laser is mainly near-infrared light, and has a wavelength of 1. 06 Lm. The heat conductor has …
I. Brief description The material to be processed is irradiated with a high power density laser beam, so that the material is quickly heated to a vaporization temperature and evaporated to form a hole. Laser drilling is the first practical laser processing technology and one of the main application areas of laser processing. It is …
Definition of laser quenching Laser quenching is the use of a laser to heat the surface of a material above the phase transition point. As the material cools itself, the austenite transforms into martensite, which hardens the surface of the material. The use of laser quenching tooth surface, its heating and cooling speed is very …
Water cutting, also known as waterjet, that is, high pressure water jet cutting technology. It is a machine that cuts with high pressure water. The workpiece can be arbitrarily carved under the control of the computer, and is less affected by the texture of the material. Because of its low cost, easy operation, and high …
I. Machining accuracy The machining accuracy of laser cutting is the overall accuracy determined by the performance of the machine, beam quality, and processing. Even if the cutting is performed according to the program, there are cases where the processed product cannot meet the accuracy requirement. Therefore, it is necessary to take countermeasures according to …
Ultra high pressure water cutting is also called water jet. It is a high-energy (380MPa) water stream produced by multi-stage supercharging of ordinary water, and then jet-cut at a speed of nearly kilometers per second through a very fine ruby nozzle (Φ0.1-0.35mm). This type of cutting is called ultra high pressure water cutting. Basic Information …
Lasers used in laser cladding mainly include CO2 lasers and solid-state lasers. It mainly includes disc lasers, fiber lasers and diode lasers. Old-fashioned lamp-pumped lasers have gradually faded out of the market due to low photoelectric conversion efficiency and cumbersome maintenance. For continuous CO2 laser cladding, domestic and foreign scholars have done a lot of …
Electrolytic processing is a special processing method that uses a principle that the metal is dissolved in an electrolyte to form a workpiece. During processing, the workpiece is connected to the positive pole of the DC power supply, the tool is connected to the negative pole, and a small gap is maintained between the two …
Electron beam processing can be used for punching, cutting, etching, soldering, heat treatment, and lithography processing depending on the energy injection time of its power density. The application of ion beam processing is expanding and innovating. The current ion beam processing used to change part size and surface physical and mechanical properties is: Ion etching …
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(1) A wide range of applications. Almost suitable for processing all materials. In addition to steel, aluminum, copper and other metal materials, it can also process particularly hard, brittle, soft non-metallic materials. Such as: plastic, leather, paper, cloth, chemical fiber, wood, plywood, asbestos, cement products, glass, granite, marble, ceramics and composite materials. (2) High processing …
The plasma has a high temperature and can provide a high enthalpy working medium to produce materials that cannot be obtained by conventional methods. In addition, the atmosphere technology is controllable, the equipment is relatively simple, and the process flow can be significantly shortened, so the plasma technology has been greatly developed. In 1879, W. …
Laser heat treatment is a method of surface treating the metal with a high power density laser beam. It can perform laser heat treatment on metals. Surface modification such as phase hardening (referred to as surface quenching, surface amorphization, surface remelting), surface alloying, etc., resulting in changes in surface composition, structure, and properties that cannot …
Powder metallurgy is the processing technology to make metal powder. Or using metal powder (or a mixture of a metal powder and a non-metal powder) as a raw material, and formed and sintered to produce a metal material, a composite material, and various types of articles. Powder metallurgy has similarities with ceramics production and belongs …
Powder making method Making powder is the first step in powder metallurgy. Powder metallurgy materials and products continue to increase, and its quality continues to increase, requiring more and more types of powders. For example, from the viewpoint of the material range, not only metal powder but also alloy powder, metal compound powder, etc.; From …
