Surface temperature in laser forming

• Autorzy: Mucha Z. , Widłaszewski J. , Cabaj M. , Gradoń R.
• Języki publikacji: EN

Abstrakty

EN

Investigations on bending plates by use of laser beam with circular cross-section are presented. Laser beam was modelled as the heat source of finite dimensions moving over the plate surface. Temperature distribution in the plastified layer of the material was taken into considerations. The bend angle was investigated as a function of processing parameters. Two analytical approximations for fast and slow moving heat source were developed. Derived formula for surface temperature allowed finding that effective bending occurs when the material surface temperature is close to the melting temperature. Optimal Fourier number for the process has been determined. Surface temperature measurements were realised with two-color fiber-optic pyrometer. On-line temperature and deformation measurements confirmed theoretical results.

Słowa kluczowe

EN

laser bending; laser forming

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2003
• Tom: Vol. 24, no 2
• Strony: 89--105
• Opis fizyczny: Bibliogr. 13 poz.,

Twórcy

autor

Mucha Z.

• Politechnika Świętokrzyska, Kielce

autor

Widłaszewski J.

• Polska Akademia Nauk

autor

Cabaj M.

• Politechnika Świętokrzyska, Kielce

autor

Gradoń R.

• Politechnika Świętokrzyska, Kielce

Bibliografia

• [1] MUCHA Z., CABAJ M., GRADOŃ R., PAWŁOWSKI M., WIDŁASZEWSKI J., Laser forming of plates by use of beam with circular and rectangular cross-section, Proc. of the LANE 2001, Int. Conf. Laser Assisted Net Shape Eng. 3, (eds.: M. Geiger, A. Otto), Meisenbach-Verlag Bamberg 2001, 527-536.
• [2] MUCHA Z., CABAJ M., GRADOŃ R., WIDŁASZEWSKI J.: Bending of plates by use of laser beam with rectangular cross-section, Adv. in Manufacturing Sci. and Tech. Polish Academy of Sciences, Com. of Mech. Eng., Vol. 25, 3, 2001, 87-99.
• [3] LI W., YAO Y. L.: Laser forming with constant line energy, Int. J. Adv. Manufacturing Tech., Springer-Verlag, Vol. 17, 2001, 196-203.
• [4] FRACKIEWICZ H., MUCHA Z., TRAMPCZYŃSKI W., BARANOWSKI A., CYBULSKI A.: A method of bending metal objects, IPPT PAN, Polish Patent No. 155 358 (26.11.1987).
• [5] FRACKIEWICZ H., MUCHA Z., TRAMPCZYŃSKI W., BARANOWSKI A., CYBULSKI A.: Method of bending metal objects, United States Patent No. 5 228 324 (20.7.1993).
• [6] GEIGER M., VOLLERTSEN F.: The mechanisms of laser forming, Annals of CIRP, Manufacturing Tech., 42, 1, 1993, 301-304.
• [7] ARNET H., VOLLERTSEN F.: Extending laser bending for the generation of convex shapes, Proc. of the Inst. of Mech. Engi., Part B: J. of Eng. Manufacture, Vol. 209, No. B5 (1995), 433-442.
• [8] FRACKIEWICZ H., MUCHA Z., GARDOŃ R., KALITA W.: Method of bending metal objects with an energy beam, United States Patent No. 5 719 374 (17.2.1998).
• [9] HOLZER S., ARNET H., GEIGER M.: Physical and numerical modeling of the buckling mechanism, [in:] Laser Assisted Net Shape Eng., Proc. of the 26th Int. CIRP Sem. on Manufacturing Systems LANE '94, Meisenbach-Verlag Bamberg 1994, 379- 386.
• [10] VOLLERTSEN F.: Mechanisms and Models for Laser Forming, [in:] Laser assisted net shape eng., Proc. of the 26th Int. CIRP Sem. on Manufacturing Systems - LANE '94, Meisenbach-Verlag Bamberg 1994, 345-360.
• [11] MUCHA Z., HOFFMAN J., KALITA W., MUCHA S.: Laser forming of thick free plates, Proc. of the LANE'97, Int. Conf. Laser Assisted Net Shape Eng. 2, (eds.: M. Geiger, F. Vollertsen), Meisenbach Bamberg, 383-392.
• [12] ASHBY M. F., EASTERLING K. E.: The transformation hardening of steel surfaces by laser beams I. Hypo-eutectoid steels, Acta Metall. Vol. 32, No 11, 1935-1948, 1984.
• [13] RYKALIN N., UGLOV A., KOKORA A.: Laser Machining and Welding, Pergamon Press, Oxford, 1978.