Experimental Research Of Laser Cutting Corners And Round Holein Steel Cutting

In enterprise at present commonly used in the production of steel plate blanking, the main cutting way of nc flame cutting, CNC plasma cutting and CNC laser cutting. Nc flame cutting in 20 mm above the most suitable thickness of steel plate cutting, the cutting plate blanking will result in artifacts of heat affected zone is bigger, the cutting surface roughness is a greater difference between machined surface roughness, especially large Angle parts of the work piece melting degree. CNC plasma cutting has the multi-function, high efficiency, high speed, high precision, low labor intensity and highly automated, cutting thickness is not ordinary carbon steel thin plate, the cutting speed for five or six times the size of flame cutting, cutting surface is bright and clean, the thermal deformation is small. But, after the plasma arc flow from the injection nozzle, flow energy density, velocity and temperature drops rapidly, which creates a cutting when the uneven distribution of temperature in thickness direction, easy to cause incision above below the melting slag, oblique mouth defect on wide below narrow, especially when cutting the work piece in a round hole in the ellipse degree is increased with the increase of cutting thickness is more and more serious, and the cutting speed and cutting quality are also fell sharply. Generally plasma arc cutting method is suitable for thin plate cutting, suit to 16 mm below the requirement for straightness of a long piece of cutting. CNC laser cutting speed faster, cutting the work piece has good surface quality, cutting round hole the roundness of high quality, with the enrichment of product structure, in order to give full play to the advantages of laser cutting, reduce working procedure, improve the production efficiency, reduce labor intensity, the laser cutting technology in various functions fully applied in the steel sheet blanking, we still need to be able to better use in laser cutting of explicit, the part of the imperfect part of laser cutting are studied fully.This paper firstly introduces three kinds of commonly used cutting the steel plate cutting way of the basic principle, characteristics and development present situation at home and abroad, analyses the quality of laser cutting in steel plate cutting blanking quality advantage and subsequent cutting quality and the size precision of work piece machining precision and efficiency, the influence of discusses the selected topic background and significance, this paper introduces the experiment condition and experimental method.Second in view of the various factors affecting the quality of laser cutting were reviewed, including the characteristics of laser, laser power, cutting speed, nozzle and nozzle height, focus position, assistant gas and so on influence on cutting quality, and on the basis of experiment of laser cutting paper summarizes the defects of steel plate, the possible reasons and solutions are summarized and expounded. And on this basis, the laser cutting of different thickness of steel plate taken by the process parameters are summarized, the rationalization of artifacts laser cutting steel plate production process parameters and standardization.Then respectively for the laser cutting Angle and cutting circular hole for manufacturability experiment, when the contained Angle of the work piece design program making Angle add rounded corners to meet laser cutting Angle of reasonable lower the degree of Angle of lack of material to a minimum, to better ensure the work piece subsequent machining demands and technology of the artifact itself; Through the technology of laser cutting round hole experiment, and according to the research and analyze the experimental data, determine the laser cutting round hole of the proportion of minimum diameter size and thickness of the work piece, according to the quality of laser cutting and high precision advantage can not only request light hole machining work piece using laser cutting directly to cut out or laser marking location and to reduce the subsequent machining of some auxiliary time, improve the production efficiency, reduce labor intensity, and for some need to be done after cutting blanking silk hole work pieces can use laser cutting machine cutting out of the bottom hole directly, in the subsequent machining you just need to tapping, greatly improving the work efficiency and reduce the labor intensity. In actual production, the method of using laser marking and cutting base hole solves the work piece holes more after cutting blanking machining work piece positioning of some difficult real-world problems, have been applied in production.Finally, the paper and the experiment of the whole work is summarized, and the laser cutting technology in the application of a cutting blanking plate was discussed, and the paper work and some important experimental methods provide a lot of theoretical basis for further research and solution to the problem and have been applied in practical production.