کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5019173 1467841 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An analytical model for the prediction of temperature distribution and evolution in hybrid laser-waterjet micro-machining
ترجمه فارسی عنوان
یک مدل تحلیلی برای پیش بینی توزیع دما و تکامل در میکرو ماشینکاری لیبرال آبجت ترکیبی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی


- An analytical temperature field model in hybrid laser-waterjet machining is obtained.
- The interaction among laser, waterjet and material is investigated.
- 3-D temperature profiles in silicon carbide during the hybrid process are established.
- Comparison of laser dry ablation and the hybrid process are conducted.
- The relationships between the temperatures and the parameters are illustrated.

A hybrid laser-waterjet micro-machining technology was developed for near damage-free micro-ablation recently. It uses a new material removal concept where the laser-softened material is expelled by a pressurised waterjet. The temperature field in this hybrid machining process is an essential quantity for understanding the underlying material removal mechanism and optimizing the process conditions. This study presents a three-dimensional (3-D) analytical model for the temperature field in this hybrid laser-waterjet micro-machining process. The interaction among the laser, waterjet, and workpiece is considered in the model. The absorption of laser by water, the formation of laser-induced plasma in water, the bubble formation and the laser refraction at the air-water interface are discussed. DuHamel's principle is used to determine a closed-form temperature equation and a solution in a variable separation form is obtained. A calculation for silicon carbide is conducted. The results are illustrated by a group of 3-D temperature profiles intuitively and visually. It is shown that the temperatures are below the melting point during the process due to the cooling action of waterjet. The almost damage-free micro-machining can be achieved. Besides, the maximum temperature increases with the increased average laser power and waterjet offset distance and decreased nozzle exit diameter where the average laser power takes a major action.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Precision Engineering - Volume 47, January 2017, Pages 33-45
نویسندگان
, , , , , ,