Selection of parameters on laser cutting mild steel plates taking account of some manufacturing purposes

Hiroshi Asano; Jippei Suzuki; Hiroshi Kawakami; Hiroshi Eguchi

doi:10.1117/12.541165

18 November 2003 Selection of parameters on laser cutting mild steel plates taking account of some manufacturing purposes

Hiroshi Asano, Jippei Suzuki, Hiroshi Kawakami, Hiroshi Eguchi

Author Affiliations +

Proceedings Volume 5063, Fourth International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.541165
Event: Fourth International Symposium on Laser Precision Microfabrication, 2003, Munich, Germany

Abstract

There are large number of processing conditions which can be set for laser-cutting of plate materials, because importance of the objective for the cutting is different from product to product. This study aims to build a system which can set the processing conditions reasonably and efficiently. From plural processing objectives, roughness of cutting surface was taken up from among the required qualities, such as processing speed, circularity of a processed hole, height of dross on the rear side, roughness of cutting surfaces, accuracy of shapes and dimensions, and with of burning, to review the effects of the processing condition on the cutting surface including the drag line gap. In our experiments, a 1 kW CO₂ gas laser machine was used to make laser-cutting samples and 389 combinations of samples were used. From the results of the experiments, the range of processing conditions which allow cutting is defined by the energy input per unit area HIA = 4.8 [J/mm²]. The values of roughness of the cutting surface on both front and rear sides of the plates can be reduced if the cutting speed is 1000 mm/min or higher, and they little change at small values if the heat input per unit area is within a range under 20 J/mm². In a range of thin plate thickness, the drag gap on cutting surfaces can be evaluated by the heat input per unit area. In the case of thicker plate, the greater the duty is, the smaller the drag gap is, if the heat input per units area is kept unchanged. Cutting with small heat input is desirable for better roughness of cutting surface. Cutting with large heat input is required for better drag gap. In the scope of our study, a value 20 J/mm² of heat input per unit area is recommended for laer-cutting of 0.8 - 4.5 mm thick mild steel plates.

Citation Download Citation

Hiroshi Asano, Jippei Suzuki, Hiroshi Kawakami, and Hiroshi Eguchi "Selection of parameters on laser cutting mild steel plates taking account of some manufacturing purposes", Proc. SPIE 5063, Fourth International Symposium on Laser Precision Microfabrication, (18 November 2003); https://doi.org/10.1117/12.541165

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