Study on burr occurrence and surface integrity during slot milling of multidirectional and plain woven CFRPs

Li, Maojun; Huang, Mingjie; Jiang, Xiaogeng; Kuo, Chunliang; Yang, Xujing

doi:10.1007/s00170-018-1937-6

Cited by 47 publications

(17 citation statements)

References 24 publications

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“…Especially in researches on micro-machining processes and working piece analyses, the precision measurement on slot and burr widths is necessary for better investigation of the micro-machining process and optimization of the machining conditions [5][6][7]. In micro-machining process, cutting conditions and cutting parameters signi cantly affect the burr formation [8][9][10]. In order to minimize burr formation, new cutting conditions are determined by measuring burr dimensions after micro-machining process.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements

Akkoyun

Erçetin

Aslantaş

2021

Preprint

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In this study, the burr and slot widths formed after micro-milling process are investigated using a rapid and accurate image processing method. The measurements are obtained by processing the images and results were compared with a manual measurement method. In the cutting experiment stage, Inconel 718 alloy was chosen as the workpiece and cutting tools with various specific properties were used. The images of the burr and slots were captured using scanning electron microscope (SEM). Different tool geometries and cutting parameters were considered for choosing the SEM images. Captured images were processed with a computer vision software which was written in C + + programming language and open-sourced computer library (Open CV). The demonstrated approach was successfully measured the slot and burr widths in plain and complex conditions where slot and burr are nested. According to the close findings of manual and automated measurements, it was observed that burr widths increased especially at the down milling sides and slot widths decreased due to the increased cutting length. Specific tool properties such as number of cutting edge, helix angle and cutting length affected the slot and burr widths. It was determined that there is a good correlation between automated and manual measurements of slot and burr widths. The accuracy of the proposed method is above 91%, 98%, and 99% for up milling, down milling, and slot measurements, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements

Akkoyun

Erçetin

Aslantaş

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…On the other hand, as a crucial tool for drill damage reduction, thrust force modelling and prediction are important for understanding the cutting mechanisms and informing hole quality and machining accuracy [8][9][10]. While the development of theoretical cutting force models in AFRP drilling is still in its infancy, studies into the cutting force models of other fiber reinforced plastic (FRP) systems are well established in the field.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic force modelling in drilling of AFRP composite considering the chisel edge extrusion

Liu

Yang

Liu

et al. 2020

Int J Adv Manuf Technol

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Aramid fiber reinforced plastic (AFRP) composites have been widely used in automotive, aerospace, and defense industries. The common AFRP drilling process tends to cause damage to the composite structures which subsequently affects their fatigue lives and in-service performance. Understanding the mechanism of cutting forces generation is crucial in controlling the cutting process for achieving desired hole quality and machining accuracy. This study proposes a novel mechanistic model considering both the cutting action and the extrusion action of the chisel edge. For the first time, the extrusion force generated by the chisel edge has been considered as a rigid wedge penetrating into an elastic half space based on the Hertz contact theory. The total thrust force in AFRP drilling is divided into three components: i) thrust force generated by the cutting lips, ii) thrust force generated by the chisel edge cutting action, and iii) extrusion force generated by the chisel edge extrusion action. The proposed model was then validated by experiments and data was compared with the case where extrusion was not considered. The results show that our novel mechanistic model can provide a more accurate thrust force prediction. The average error of our model was 2.54% against the experimental data, whereas the error seen in conventional model without accounting extrusion was 8.22%. This suggests that the chisel edge extrusion plays a significant part in the drilling of AFRP, and hence confirms the necessity of considering extrusion in establishing the associated mechanistic model.

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“…Especially in studies on micro-machining processes and working piece analyses, the precision measurement on slot and burr widths is necessary for better investigation of the micro-machining process and optimization of the machining conditions [ 11 , 12 , 13 , 14 ]. In the micro-machining process, cutting conditions and cutting parameters significantly affect the burr formation [ 15 , 16 , 17 , 18 ]. To minimize burr formation, new cutting conditions are determined by measuring burr dimensions after the micro-machining process.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements in Micro-Milling

Akkoyun

Erçetin

Aslantaş

et al. 2021

Sensors

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In this study, the burr and slot widths formed after the micro-milling process of Inconel 718 alloy were investigated using a rapid and accurate image processing method. The measurements were obtained using a user-defined subroutine for image processing. To determine the accuracy of the developed imaging process technique, the automated measurement results were compared against results measured using a manual measurement method. For the cutting experiments, Inconel 718 alloy was machined using several cutting tools with different geometry, such as the helix angle, axial rake angle, and number of cutting edges. The images of the burr and slots were captured using a scanning electron microscope (SEM). The captured images were processed with computer vision software, which was written in C++ programming language and open-sourced computer library (Open CV). According to the results, it was determined that there is a good correlation between automated and manual measurements of slot and burr widths. The accuracy of the proposed method is above 91%, 98%, and 99% for up milling, down milling, and slot measurements, respectively. The conducted study offers a user-friendly, fast, and accurate solution using computer vision (CV) technology by requiring only one SEM image as input to characterize slot and burr formation.

show abstract

Study on burr occurrence and surface integrity during slot milling of multidirectional and plain woven CFRPs

Cited by 47 publications

References 24 publications

WITHDRAWN: Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements

WITHDRAWN: Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements

Mechanistic force modelling in drilling of AFRP composite considering the chisel edge extrusion

Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements in Micro-Milling

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