Tool Path Selection Strategies for Complex Sculptured Surface Machining

Kaymakci, M.; Lazoğlu, İsmail

doi:10.1080/10910340801913979

Cited by 23 publications

(11 citation statements)

References 9 publications

(8 reference statements)

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“…The total force in i direction is calculated by adding all the contributions for each discrete element. (7) Where N is the number of discretization planes, which could be modified depending on the accuracy required. As a result, the 3D matrixes are reduced to 2D.…”

Section: Force Summationmentioning

confidence: 99%

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Mechanistic Model for Prediction of Cutting Forces in Turning of Non-axisymmetric Parts

Cascón

Sarasua

2015

Procedia CIRP

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Most of the existing mechanistic (semiempirical) models for turning are orientated towards continuous cut and are applicable neither to nonaxisymmetric parts, nor to the particular case of interrupted turning, so common in real workpieces. Some commercial software packages which simulate machining process by FEM enable to calculate interrupted cut. However, their high computational cost limits the simulations to a very short length of cut, hardly completing one cutting revolution. By contrast, mechanistic models are not as computationally expensive as FEM ones. Despite their limited accuracy, they give approximate estimations of cutting forces during a whole tool path. Consequently, they are extremely useful to detect critical tool path steps, adapt cutting parameters and avoid machine overload. This study presents a mechanistic model to predict orthogonal turning forces in 3 directions (XYZ), torque and power consumption along the machining path of non-axisymmetric parts. The model communicates with CAM software by automatically transferring information about tool path and geometry from the CAM to the mechanistic model in standard format, contained in CL (Cutter Location) and STL (Stereolithography) files, respectively. Thus, the model is suitable to be integrated into any commercial CAM software. The simplicity of the model, the communication with CAM and an easy-to-use interface aim to spread out the applicability of the model among machining companies. The results of the study are validated by comparing simulations to experimental turning tests.

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Section: Force Summationmentioning

confidence: 99%

“…Furthermore, as it directly influences the simulation speed and memory requirements, the calculation of tool-workpiece engagements is also object of study [6], [7]. Most authors determine engagement domains by analytic, B-Nurbs, dexel, voxel, and STL triangulation representations.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Model for Prediction of Cutting Forces in Turning of Non-axisymmetric Parts

Cascón

Sarasua

2015

Procedia CIRP

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“…Among them, the finishing stage is the most complex because a ball-end cutting tool is required to achieve the highest removal of material from a free-form surface. Thus, the tool-surface contact changes completely along the machining process [3], as well as the cutting speed and chip formation [4].…”

Section: Introductionmentioning

confidence: 99%

Study of tool paths calculated by different commercial CAM systems and influences on the real machining time and surface roughness for milling free-form geometries

Souza

Käsemodel

Arias³

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Today, there are many commercial CAM systems available capable of generating NC codes for milling free-form geometries up to 5-axis. However, the quality of these NC codes has not yet been well discussed so far. Apparently, on the computer screen and the geometrical simulation provided by CAM, tool paths calculated by different CAM systems seem to be the same. However, as observed in this work, NC codes differ expressively according to the CAM software applied, and it affects the productivity and quality of the machined surface. Thus, a study was carried out to investigate this issue. A representative workpiece with free-form geometries was designed; a data acquisition system from an open architecture CNC was developed and NC codes were generated by five worldwide commercial CAM systems. The finishing milling operation was evaluated. The results presented difference of up to 30% on the real machining time, differences in the feed rate oscillation and up to 2 times the surface roughness value. This work reveals an essential limitation on the CAM algorithm and arises a new point for benchmarking CAM systems, which brings an opportunity to improve the calculation of tool paths for milling free-form geometries.

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“…In the strategy selection for the finishing operations, it is necessary to take into account on the one hand the shape, size and local curving of work-piece surfaces and on the other hand the shape and geometry of the tool. The strategies evaluation considering the machined surface quality and cutting forces is described in [8,9] as well. Increasing the computer's performance the new strategies are developed based on the tool path generation using mathematic models.…”

Section: Introductionmentioning

confidence: 99%

Manufacturability Verification and Comparison of Quality Parameters of Shaped Surface

Tomáš¹,

Draganovská²,

Hudák³

et al. 2014

Acta Metall Slovaca

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The paper describes stamping punch production from the view manufacturability and quality of stamping punch active surfaces. The tin car-body stamping punch has been chosen as a subject of experimental work. The experimental stamping punch has been made out of Textit and production stamping punch has been made out of tool steel X210Cr12. Milling strategies has been proposed and verified using CAM software SolidCAM considering the maximum Scallop Height. The roughness parameters Ra and Rz measured on selected areas of stamping punch shaped surface were compared to Scallop Height. Manufactured areas on shaped surface were optically evaluated as well. The application of proposed procedure is shown as an example of manufacturability for experimental and production stamping punch designed for complex parts production.

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Tool Path Selection Strategies for Complex Sculptured Surface Machining

Cited by 23 publications

References 9 publications

Mechanistic Model for Prediction of Cutting Forces in Turning of Non-axisymmetric Parts

Mechanistic Model for Prediction of Cutting Forces in Turning of Non-axisymmetric Parts

Study of tool paths calculated by different commercial CAM systems and influences on the real machining time and surface roughness for milling free-form geometries

Manufacturability Verification and Comparison of Quality Parameters of Shaped Surface

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