Cutting Force Dynamics as a Tool for Surface Profile Monitoring in AWJ

Author:

Kovacevic R.1,Mohan R.1,Zhang Y. M.1

Affiliation:

1. Center for Robotics and Manufacturing Systems and Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506

Abstract

Abrasive waterjet cut surface is characterized using static and dynamic characterization techniques. A novel method of auto regressive moving average model identification called model distance method is utilized here for surface profile and dynamic force characterization. More information about the surface profile generating mechanism is derived through wavelength decomposition of the ARMA models. The dynamic workpiece normal force in abrasive waterjet is influenced by process parameters such as fluctuations in water pressure, change in abrasive flow rate, vibration of the positioning system, traverse speed, nozzle diameter, etc. An attempt has been made in this paper to link the dynamics of the process to the quality of the generated surface. The feasibility of using the dynamic workpiece normal force as a parameter for on-line monitoring of the surface profile generated by abrasive waterjet is also investigated.

Publisher

ASME International

Subject

General Medicine

Reference31 articles.

1. Tan, D. K. M., 1986, “A Model for the Surface Finish in Abrasive Waterjet Cutting,” 8th International Symp. on Jet Cutting Technology, England, 9–11 Sept., Paper 31, pp. 309–313.

2. Hashish, M., 1989, “Advanced Machining with Abrasive Waterjets—Theory and Applications,” Proceedings of Non-Traditional Machining Conference of SME, Oct. 30–Nov. 2, pp. 1–45.

3. Webb, K. E., and Rajurkar, K. P., 1990, “Surface Characterization of Inconel Cut by Abrasive Waterjet,” Proceedings of CSME Mechanical Engineering Forum.

4. Hashish M. , 1991, “Characteristics of Surfaces Machined with Abrasive-Waterjets,” ASME Journal of Engineering Materials and Technology, Vol. 113, July, pp. 354–362.

5. Kovacevic, R., Liaw, H. H., and Barrows, J. F., 1988, “Surface Finish and its Relationship to Cutting Parameters,” Proceedings of 3rd Intl. Grinding Conference, MR88-589, pp. 1–15.

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