An Automatic Cost Calculation System for 3-D Laser Cutting Based on Characteristic Numbers


Article Preview

At present, small and medium-sized enterprises (SME) in the sheet metal industry performing 3-d laser cutting have to invest a considerable amount of time in offer preparation, although there is a low probability of obtaining the order. The offer calculation is mostly done manually and rapidly, as estimation. For example, the length of the contours to be cut are extracted from drawings and summed up. The actual production time for problem areas of the workpiece geometry like sharp angles and narrow radii can only be calculated by a post-processor simulation, or by a comparison with a similar workpiece that was manufactured before. This complicates the cost calculation and adds an unknown factor to it. Therefore, only experienced employees can estimate the costs for the cutting of 3-d workpieces. The aim of the proposed automatic cost calculation algorithm is the quick machining time calculation for 3-d laser cutting. Less experienced persons should be able to use a pre-configured tool. Characteristic numbers are generated on the basis of the workpiece geometry. They describe all necessary machine work that is required to manufacture the current workpiece. In a next step, the dynamic machine behaviour for these problem areas needs to be examined. It is projected to specific machine parameters. As example the acceleration and the maximum cutting velocity are basic parameters. By connecting the characteristic numbers with the machine parameters, the machining time for a specific machine is calculated. This machining time is an important factor for the cost calculation. The characteristic numbers can also be used to find similar workpieces within a database. This database contains existing and already evaluated offers. As a plausibility check the user can search for similar offers and compare them with the currently prepared one.



Main Theme:

Edited by:

M. Geiger, J. Duflou, H.J.J. Kals, B. Shirvani and U.P. Singh






M. Masur et al., "An Automatic Cost Calculation System for 3-D Laser Cutting Based on Characteristic Numbers", Advanced Materials Research, Vols. 6-8, pp. 825-0, 2005

Online since:

May 2005




[1] H. K. Tönshoff, A. Ostendorf, C. Peper: E. Kuljanic (Ed. ), Advanced Manufacturing Systems and Technology 1999, Proceedings of the 5th International Conference, 3rd-4th June 1999, Udine. ISBN 3-211-83148-7. Springer, Wien, 1999, Germany, p.537.

[2] C. Peper, Werkstattorientierte Angebotsplanung für die Blechteilefertigung, VDI-Verlag, Düsseldorf 2002, Germany.

[3] H. K. Tönshoff, C. Graumann, B. Sindilar: D. Roller (Ed. ), Conference proceedings of 31st ISATA, 2nd-5 th June 1998, Düsseldorf. ISBN 0-9532576-2-2. ISATA, Croydon, 1998, Germany, p.359.

[4] A. Köhler: Beitrag zur Informationsverarbeitung für das numerisch gesteuerte Laserschneiden. VDI-Verlag, Düsseldorf 2000, Germany.

[5] H.K. Tönshoff, J. Werhan C. Peper. M. Masur: Proceedings of the First International WLTConference on Lasers and Manufacturing June 2001 Munich, AT-Fachverlag GmbH, Germany, p.231.

[6] H.K. Tönshoff, A. Ostendorf, M. Masur: Proceedings of the 10th International Conference SheMet 2003 at the University of Ulster, 14th - 16th April 2003, North Ireland, p.263.

In order to see related information, you need to Login.