Experimental Study on Surface Integrity and Kerf Characteristics During Abrasive Waterjet and Hybrid Machining of CFRP L
- PDF / 6,273,233 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 103 Downloads / 216 Views
International Journal of Precision Engineering and Manufacturing https://doi.org/10.1007/s12541-020-00415-8
REGULAR PAPER
Experimental Study on Surface Integrity and Kerf Characteristics During Abrasive Waterjet and Hybrid Machining of CFRP Laminates Xujing Yang1 · Xiangchen Lin1 · Maojun Li1 · Xiaogeng Jiang2 Received: 7 March 2020 / Revised: 19 June 2020 / Accepted: 10 September 2020 © Korean Society for Precision Engineering 2020
Abstract The use of abrasive waterjet to cut CFRP laminates has been proved to be feasible with several advantages compared with traditional machining methods, while relatively poor surface quality and kerf taper impede its application in automotive industry. In this work, the influence of various process parameters including hydraulic pressure, cutting speed and stand-off distance on surface integrity and kerf characteristics was comprehensively studied. A statistical model was further developed using response surface method involving 17 trials. Statistical analysis found that higher level of cutting speed led to the decrease of kerf width and the increase of surface roughness. Based on optimizing the expected function of responses, the minimum taper error of 0.058 mm and superior surface roughness (Ra) of 3.58 μm were obtained. Furthermore, hybrid machining strategy integrating AWJ and CNC milling processes was proposed to cut CFRP laminate in order to obtain both high efficiency and superior surface quality. The depth of cut for post-milling process was set down to 0.1 mm. It was found that kerf taper was completely removed with relatively flat surface, and surface roughness (Ra ~ 1.20 μm) was reduced by up to 5.61 μm with an overall decrease of about 80%. Keywords Composites · Abrasive waterjet · Kerf characteristics · Surface integrity · Hybrid machining
Introduction Machining of carbon fiber reinforced plastic (CFRP) composites has become a research focus with the rapid development of aerospace and automotive industries. Composite materials have been widely used due to relatively high specific strength and modulus, superior mechanical properties and good corrosion resistance [1]. The amount of composite materials used on aircraft largely reflects the development level of aviation industry [2]. Similarly, the demand of carbon fiber composites in automotive industry has also increased significantly [3]. In order to reduce the total weight of car body structures, CFRP components are increasingly replacing traditional metallic ones to enhance the performance of automobiles and reduce fuel consumption. During * Maojun Li [email protected] 1
State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, Hunan, China
School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
2
curing process, CFRP components are mostly produced to be near-net-shape, while in order to achieve dimensional tolerance and fitting surface, it is necessary to use a variety of post-machining methods to meet the final re
Data Loading...
