scholarly journals Drilling and Helical Milling for Hole Making in Multi-Material Carbon Reinforced Aluminum Laminates

2021 ◽  
Author(s):  
Gururaj Bolar ◽  
Advith K. Sridhar ◽  
Aashrayi Ranjan
Keyword(s):  
Helical Milling ◽  
Hole Making

Performance of Tools Design when Helical Milling on Carbon Fiber Reinforced Plastics (CFRP) Aluminum (Al) Stack

2013 ◽  
Vol 465-466 ◽  
pp. 1075-1079 ◽  
Author(s):  
Erween Abdul Rahim ◽  
Z. Mohid ◽  
M.R. Hamzah ◽  
A.F. Yusuf ◽  
N.A. Rahman
Keyword(s):  
Milling Process ◽  
Helical Milling ◽  
Machining Parameters ◽  
Reinforced Plastics ◽  
Comparable Performance ◽  
Hole Making ◽  
Milling Characteristics ◽  
The Common ◽  
Fiber Reinforced Plastics

Hole making process is not strictly to the drilling technique where others machining could also influence to the quality in CFRP hole.Therefore, helical milling process becomes as an alternative method to produces bore on CFRP plate thus minimizing the defects. The common defects on CFRP are delamination, splintering and cracking. Meanwhile, if the CFRP stacking together with aluminum plate, burr at exit hole of aluminium plate is produced. Therefore, it is essential to control the critical machining parameters to assure a good quality of the hole. The main objective of this project is to improve the hole quality of CFRP/AL stack in terms of surface roughness using helical milling technique. In addition the cutting force and temperature will be measured as well. There are three levels of cutting speeds; two levels of feed rate and depth per helical path are made accordingly to helical milling characteristics. It was found that all tool design exhibit comparable performance for helical milling process on CFRP/Al stack.

Research on Helical Milling Specialized Tool Based on Chip-Splitting Mechanism

2014 ◽  
Vol 1061-1062 ◽  
pp. 497-506 ◽  
Author(s):  
Qing Liang Chen ◽  
Xue Mei Chen ◽  
Zuo Heng Duan ◽  
Wen Yuan Cun
Keyword(s):  
Titanium Alloy ◽  
Service Life ◽  
Cutting Edge ◽  
Helical Milling ◽  
End Mill ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Milling Tool ◽  
Hole Making ◽  
On Chip

Compared with conventional push drilling, helical milling (orbital drilling) shows great advantages in aeronautical hard-machining materials hole making. However, helical milling of titanium alloy and carbon fiber reinforced plastic (CFRP) under dry cut condition still faces challenges such as burr of titanium alloy hole exit and CFRP hole delamination. In order to solve these problems, an innovative helical milling tool with distributed multi-point front cutting edge is designed based on the chip-splitting mechanism and tool movement feature. The description of cutting edge movement track and simulation of chip shape is used to analyze different functions of front and peripheral cutting edges, the chip-splitting result and the specialized tool's service life. The helical milling experiments are aimed to test the performance of the specialized tool compared with that of traditional end mill. Results show that the specialized tool can machine titanium hole free of burr and CFRP hole without delamination under dry cut condition. The specialized tool has a longer service life with its machining capacity amounting to 80 titanium holes and 65 CFRP holes..

Study on Machining Damage of Helical Milling for C/E Composites

2017 ◽  
Vol 872 ◽  
pp. 49-55
Author(s):  
Jun Xu ◽  
Xiang Long Zhu ◽  
Ren Ke Kang ◽  
Guo Lin Yang ◽  
Dong Ming Guo ◽  
...  
Keyword(s):  
Processing Parameters ◽  
Helical Milling ◽  
Feed Speed ◽  
Damage Area ◽  
Tool Shape ◽  
Hole Making ◽  
Orbital Revolution ◽  
Carbon Fiber Epoxy ◽  
Milling Tools ◽  
Machining Damage

Carbon fiber/epoxy resin composites (C/E composites) are wildly used in manufacture of aircraft fuselages and wings in aerospace industry, due to their excellent properties. However, hole making of C/E composites always results in machining damage, such as burr, tearing, delamination and so on. Milling tools with different shapes were used to conduct helical milling experiments on C/E composites. The influence of tool shape on machining damage was analyzed by measuring the damage area of burr, tearing and delamination. And then the feed speed, axial feed per orbital revolution and spindle speed was changed respectively to study the effect of processing parameters on machining damage. The machining damage can be reduced by choosing appropriate tool shape and processing parameters.

scholarly journals Study on Hole Making Process of Thick-section Carbon Fiber Reinforced Plastics

2021 ◽  
Author(s):  
Jianping Li ◽  
Anyuan Jiao ◽  
Xiaomei Chen
Keyword(s):  
Carbon Fiber ◽  
Spindle Speed ◽  
Helical Milling ◽  
Thick Section ◽  
Fiber Reinforced ◽  
Influence Of Process Parameters ◽  
Variable Parameters ◽  
Hole Making ◽  
Carbon Fiber Reinforced

Abstract In this paper, the mechanism of helical milling was analyzed at first. Then, the orthogonal experiments on the 24mm thick carbon fiber reinforced composite material (CFRP) that affect the quality of hole making, such as spindle speed, feed per tooth, and number of tool’s blades were conducted. The influence of process parameters on the quality of hole making was analyzed. Finally, the range analysis method was used to obtain the best hole-making parameters: spindle speed is 4500rpm, feed per tooth is 0.02mm/z, the number of tool’s blades is 2. Based on the obtained optimal parameters, the step-by-step hole making of thick-section CFRP with variable parameters was studied, and two sets of parameters were designed. Through the measurement of the hole morphology, roughness, axial force and aperture deviation after the experiment, it is concluded that hole making process with variable parameters can meet the technical requirements of thick-section CFRP.

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