Advanced Free Form Manufacturing by Computer Aided Systems - Cax

Souza, Adriano Fagali de; Bodziak, Sabrina

doi:10.5772/36324

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…Ball nose cutters are used for milling free form geometries because of the option of continuously changing the contact point of the cutting edge by changing the angle between the surface or the surface normal and the axis of the tool [14]. As a result, however, the nominal tool diameter does not correspond to the diameter in contact with the machined surface [15]. According to Kaymakci a Lazogle, the interaction between the tool and the work piece changes continuously and cannot be calculated analytically [16] due to complex geometry.…”

Section: Related and Previous Workmentioning

confidence: 99%

Discovery of a secondary roughness phenomenon during an experiment confirming a new hypothesis concerning the “Ball nose milling with a tilt angle milling strategy”

Vyšata¹,

Vagaská

šulcová³

2022

Preprint

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Background: During ball-nose milling using the presently popular tool-dragging strategy (by this is meant ball nose milling with a tilt angle milling strategy ‒ in the further text, the shorter designation "tool-dragging strategy" will be used), a considerable force component acts in the direction perpendicular to the normal plane of the surface of the machined part and, actually, also to the vector of feeding speed. They tend to cause tool vibration in the direction of their action. Aim: The aim was to confirm, by an experiment, the theory that during ball-nose milling using the tool-dragging strategy, its additional lateral tilt might improve the cutting conditions and contribute to the stabilisation of the cutting process. Thanks to that, it may be possible to achieve higher productiveness in machining using a slim tool. Methods: The main experiment was a full-factor experiment with repetition and randomization. It had three factors: The main factor was the angle of lateral tilt, which was in 19 levels, the other two were the tool RPMs and the feeding speed, both of them in three levels. The total number of tests was 342. As responses, cutting forces, acoustic emissions (in a limited extent), and surface roughness were measured. During the experiment, it was discovered that with positive lateral tilt angles of the tool, its mark was divided into two perceivably separated bands, one of which was of significantly higher surface quality than the mark tool with no lateral tilt.Results: For the cutting force response model, the experiment confirmed the hypothesis with a determination coefficient value of 93 %. For the models of the other responses, the factor was lower, still, they were in conformity with the hypothesis. Conclusion: The results of the research may confirm that, if using a slim ball nose tool for finishing operations is necessary, suitable lateral tilt could help achieve better cutting stability and surface quality or higher machining productiveness. As a side effect, the phenomenon of a secondary surface with startlingly better roughness value was newly observed when a lateral tilt was used. This is also described in the article.

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Section: Related and Previous Workmentioning

confidence: 99%

Discovery of a secondary roughness phenomenon during an experiment confirming a new hypothesis concerning the “Ball nose milling with a tilt angle milling strategy”

Vyšata¹,

Vagaská

šulcová³

2022

Preprint

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“…The tools used to access the information and knowledge regarding the product data are the computer-aided technologies (CAx). Computer-aided technologies (CAx) [7,8] are the use of computer technology to aid in the design, analysis, production planning, manufacture of products, etc. Introductory Chapter: Integration of Computer-Aided Technologies in Product Lifecycle... http://dx.doi.org/10.5772/66202…”

Section: Computer-aided Technologies In Product Lifecycle Managementmentioning

confidence: 99%

Introductory Chapter: Integration of Computer-Aided Technologies in Product Lifecycle Management (PLM) and Human Lifecycle Management (HUM)

Udroiu¹

2016

Computer-Aided Technologies - Applications in Engineering and Medicine

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“…These are the areas where contact is made between the tool and the machined surface. In the first region, the tool axis is parallel to the machined surface, and in the second region, the material is cut through the center of the tool, and the position of the tool axis is almost perpendicular to the machined surface [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…The advantage of using a ball end mill for multi-axis milling of free-form surfaces is the ability to change the cutting-edge contact depending on the angle between the machined surface and the tool axis [15]. Therefore, the nominal diameter of the tool changes when in contact with the machined surface [17]. In the case when the cutting speed of the tool is zero (cutting by the center of the tool), the material is removed not by the shearing process but as a result of plastic deformation, known as plowing [15].…”

Section: Introductionmentioning

confidence: 99%

Surface Quality Evaluation in the Milling Process Using a Ball Nose End Mill

Varga,

Ižol,

Vrabeľ

et al. 2023

Applied Sciences

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Shaped surfaces are increasingly used in the field of mold-making for casting or injection molding, where future products include shapes with different curvatures. These are surfaces that form convex curves, concave curves, or a combination thereof. Given these machined surfaces, it is important to know the impact of the finishing strategies on these surfaces. This paper deals with the comparison of finishing milling strategies in the production of shaped surfaces and the analysis of different methods for the evaluation of surface topography. In addition, the experimental results evaluate the roughness of the machined surface and surface shape variations. The material used for the experiments was AlCu4Mg aluminum alloy, and Constant Z, spiral and spiral circle strategies were chosen for the finishing strategies. The evaluation of surface topography and surface roughness was carried out at three different specimen heights with respect to the tool’s contact with the machined surface.

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Advanced Free Form Manufacturing by Computer Aided Systems - Cax

Cited by 5 publications

References 5 publications

Discovery of a secondary roughness phenomenon during an experiment confirming a new hypothesis concerning the “Ball nose milling with a tilt angle milling strategy”

Discovery of a secondary roughness phenomenon during an experiment confirming a new hypothesis concerning the “Ball nose milling with a tilt angle milling strategy”

Introductory Chapter: Integration of Computer-Aided Technologies in Product Lifecycle Management (PLM) and Human Lifecycle Management (HUM)

Surface Quality Evaluation in the Milling Process Using a Ball Nose End Mill

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