A Novel Helical Milling End-Effector and Its Application

Fang, Qiang; Pan, Zemin; Fei, Shaohua; Xie, Xuedong; Ke, Yinglin

doi:10.1109/tmech.2015.2409986

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…The helical milling process is based on a rotating mill, which performs a helical trajectory. According to Fang et al [10] and Tanaka et al [11], in helical milling, besides the tool rotation around its own axis, with a related cutting velocity (vc) in [m/min], the result of the synchronism between the axial feed of z CNC axis and the interpolation of the xy axes generates the helical path. The borehole diameter (Db) is determined by the tool diameter (Dt) and the helical diameter (Dh), as shown in Fig.…”

Section: Cutting Forces In Helical Millingmentioning

confidence: 99%

Multivariate robust modeling and optimization of cutting forces of the helical milling process of the aluminum alloy Al 7075

Pereira

Leite

Alvim

et al. 2017

Int J Adv Manuf Technol

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Helical milling is an advanced hole-making process and different approaches considering controllable variables have been presented addressing modelling and optimization of machining forces in helical milling. None of them considers the importance of the noise variables and the fact that machining forces components are usually correlated. Exploring this issue, this paper presents a multivariate robust modelling and optimization of cutting forces of the helical milling of the aluminum alloy Al 7075. For the study, the tool overhang length was defined as noise variable since in cavities machining there are specific workpiece geometries that constrain this variable; the controllable variables were axial feed per tooth, tangential feed per tooth and cutting speed. The cutting forces in the workpiece coordinate system were measured and the components in the tool coordinate system, i.e., the axial and radial forces, were evaluated. Since these two outcomes are correlated, the weighted principal component analysis was performed together with the robust parameter design to allow the multivariate robust modelling of the mean and variance equations. The normal boundary intersection method was used to obtain a set of Pareto robust optimal solutions related to the mean and variance equations of the weighted principal component. The optimization of the weighted principal component through the normal boundary intersection method was performed and the results evaluated in the axial and radial cutting forces components. Confirmation runs were carried out and it was possible to conclude that the models presented good fit with experimental data and that the Pareto optimal point chosen for performing the confirmation runs is robust to the tool overhang length variation. Finally, the cutting force models were also presented for mean and variance in the workpiece coordinate system in the time domain, presenting low error regarding the experimental test, endorsing the results.

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Section: Cutting Forces In Helical Millingmentioning

confidence: 99%

Multivariate robust modeling and optimization of cutting forces of the helical milling process of the aluminum alloy Al 7075

Pereira

Leite

Alvim

et al. 2017

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Compared with the common straight-tooth cylindrical milling, helical milling is recommended for improvement of machining efficiency, cutting quality and stability, and to reduce cutting abrasion [20,21,22]. Although helical milling has a wide application field for processing various materials [23], it is rarely used in LVT machining. Meanwhile, for LVT as a new engineering material, there is still no report that focuses on its machinability during helical milling.…”

Section: Introductionmentioning

confidence: 99%

Machinability of Luxury Vinyl Tiles during Plain Milling Using a Helical Cutter

et al. 2019

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In order to better provide a theoretical basis for the machining of luxury vinyl tiles, a helical milling experiment was conducted by using diamond cutting tools, and special attention was given to the trends of cutting force and surface roughness in respect to tool geometry and cutting parameters. The results showed that the resultant force was negatively correlated to the helix angle and cutting speed, but positively correlated with the cutting depth. Then, that the surface roughness increased with a decrease of the helix angle and an increase of cutting depth, while as cutting speed raised, the surface roughness first declined and then increased. Thirdly, the cutting depth was shown to have the greatest influence on both cutting force and surface roughness, followed by helix angle and cutting speed. Fourth, the contribution of cutting depth only was significant to cutting force, while both the helix angle and cutting speed had insignificant influence on the cutting force and surface roughness. Finally, the optimal cutting conditions were proposed for industrial production, in which the helix angle, cutting speed and cutting depth were 70°, 2200 m/min and 0.5 mm, respectively.

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“…[1][2][3][4] For example, a new helical milling end-effector was developed to achieve high positional accuracy for its spindle eccentricity. 5 To track an end-effector, a novel approach was proposed that used a two-dimensional laser scanner to obtain a truck's manipulator geometry in real time. 6 A robot end-effector was designed to have 'biting' and 'swallowing' functions based on imitation of a snake's mouth to allow it to grasp objects.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of a novel rescue end-effector

Wang

Zhao

Xia

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper describes the design of a novel multi-functional rescue end-effector with tonging, shearing and grasping capabilities to meet the demands of urban catastrophe rescue applications. The tonging and shearing form and the grasping form of the end-effector are analysed. The two forms are determined using the transformations of their grasping mechanisms. Four objectives (to maximize shearing space, minimize mass, minimize the equivalent stress and minimize deformation) are proposed for selection of the optimal grasping mechanism structure. Additional objectives also involve the end-effector’s structural strength and kinematic characteristics. A nested optimization structure that is composed of the non-dominated sorting genetic algorithm II (NSGA-II) and finite element analysis is proposed to perform multi-domain and multi-objective optimization of the end-effector. To improve the optimization efficiency, a traditional synthesis technique and a sensitivity analysis are applied to reduce the outer and inner numbers of the design variables. Simulation results indicate that the values of the four target objectives are superior to those before optimization and two referenced objectives, and the end-effector mass in particular, can evidently be reduced.

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A Novel Helical Milling End-Effector and Its Application

Cited by 8 publications

References 20 publications

Multivariate robust modeling and optimization of cutting forces of the helical milling process of the aluminum alloy Al 7075

Multivariate robust modeling and optimization of cutting forces of the helical milling process of the aluminum alloy Al 7075

Machinability of Luxury Vinyl Tiles during Plain Milling Using a Helical Cutter

Design and optimization of a novel rescue end-effector

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