Optimization of process parameters for machining of Al 7075 thin-walled structures

Borojević, Stevo; Lukić, Dejan; Milošević, Milan; Vukman, Jovan; Kramar, Davorin

doi:10.14743/apem2018.2.278

Cited by 29 publications

(27 citation statements)

References 11 publications

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“…Often, during the relaxation process, the objects are destroyed, which is also associated with additional costs [7,15,18,31,32]. However, it should be noted that deformations of thin-walled elements also arise from other factors, such as temperature, clamping force, cutting force, tool geometry, etc., [33][34][35][36][37][38].…”

Section: Methodsmentioning

confidence: 99%

Pre-Machining of Rolled Plates as an Element of Minimising the Post-Machining Deformations

2020

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The paper presents the influence of the milling strategy, the relation between the cutting tool feed direction and the rolling direction, as well as the pre-machining consisting of the removal of the textured surface layer of rolled plates in the rolling process on the thin-walled elements deformations made of the EN AW-2024 T351 wrought aluminium alloy, after milling. The research used strategies such as: high-performance cutting (HPC), high-speed cutting (HSC) and conventional milling (CM), as well as their combinations. Another tested variable was the relation between the tool feed direction and the rolling direction. In addition, the tests were carried out in the following versions: leaving the textured surface layer created after plastic working and with its removal with technological parameters corresponding to HSC and CM. Based on the obtained results, it was found that the post-machining deformation of thin-walled elements can be minimised owing to the use of a selected milling strategy and its combination with pre-machining (or lack thereof). It was also observed that larger deformations were obtained for samples after milling in the direction perpendicular to the rolling direction.

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Section: Methodsmentioning

confidence: 99%

Pre-Machining of Rolled Plates as an Element of Minimising the Post-Machining Deformations

2020

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“…Aluminum alloy 7075 belongs to aluminum alloys for crushing (plastic deformation). The alloys 7075 have high mechanical properties, good machinability and the applicability of thermal processes, but have good corrosion resistance [23]. They belong to the group of "hard alloys".…”

Section: Experimental Partmentioning

confidence: 99%

Optimization of Machining Parameters Using the Taguchi and ANOVA Analysis in the Face Milling of Aluminum Alloys AL7075

et al. 2020

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This paper examines the influence of the cutting parameters on the cutting forces and the surface roughness at the face milling process when machining aluminum alloy 7075 is obtained by the new SSM casting process. The parameters of the milling process are the cutting speed, the feed per tooth and the depth of cut. The experiments were performed according to the Taguchi method according to the L9 plan and the factors varied at three levels. For analysis of the effects of these parameters S/N ratio is used. In addition, ANOVA analysis was performed, i.e. analysis of the variance of the selected parameters. The analysis of the results shows that the optimal combination for the cutting force is the choice of a minimum level for all tested parameters. In contrast, for average arithmetic roughness, the optimal processing regime is achieved with minimum values for cutting speed and feed per tooth, whilst it is preferable to choose the cutting depth at the median level for the observed range. In addition, the study shows that the Taguchi method is suitable for solving the problem, where the research was carried out with a minimum number of tests compared to a full factorial experimental plan.

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“…Major significant indicator of surface quality is surface roughness [6,7]. It is well-known that by increasing the tool tip radius rε, the quality of machined surface increases.…”

Section: Cutting By Straight Cutting Edgementioning

confidence: 99%

Machining of Wood as a Natural Composite Material

2019

Teh. vjesn.

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In the paper, the wood as natural fibre-layered composite is used to study the principles of effect in machining of such composites and provide the suggestion how to eliminate the unwanted effects in composite material cutting. The suggestion is not in special tool geometry, cutting tool material, toolpath strategy etc. but is based on basically different principle of machining. The actual research in cutting of composites is focused on orthogonal cutting as 2D process. We have to take into account the 3D behaviour of chip forming, as the workpiece material is non-homogeneous and directionally oriented. Thus, we studied the idea of so-called free cutting or cutting by straight cutting edge. The principles of such cutting were tested on wood as natural fibre-layered composite and the results are presented in the paper.

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Optimization of process parameters for machining of Al 7075 thin-walled structures

Cited by 29 publications

References 11 publications

Pre-Machining of Rolled Plates as an Element of Minimising the Post-Machining Deformations

Pre-Machining of Rolled Plates as an Element of Minimising the Post-Machining Deformations

Optimization of Machining Parameters Using the Taguchi and ANOVA Analysis in the Face Milling of Aluminum Alloys AL7075

Machining of Wood as a Natural Composite Material

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