A Corner Rounding and Trajectory Generation Algorithm for Five-axis Linear Toolpath

Zhao, Huan

doi:10.3901/jme.2018.03.108

Cited by 7 publications

(2 citation statements)

References 1 publication

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“…The fitting methods, including approximation algorithms and interpolation algorithms, are adopted by some advanced CNC systems. Local transition is mainly through the use of other curves to replace the original linear trajectory in the corner to achieve the purpose of smoothness [3][4][5][6][7][8][9][10][11]. Zhang et al [3], proposed a transition algorithm for two continuous linear segments based on the cubic Hermite curve fitting approach.…”

Section: Introductionmentioning

confidence: 99%

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An Optimal Feed Interpolator Based on G2 Continuous Bézier Curves for High-Speed Machining of Linear Tool Path

Jin

Zhao

Wang

2019

Chin. J. Mech. Eng.

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A numerical control (NC) tool path of digital CAD model is widely generated as a set of short line segments in machining. However, there are three shortcomings in the linear tool path, such as discontinuities of tangency and curvature, huge number of line segments, and short lengths of line segments. These disadvantages hinder the development of high speed machining. To smooth the linear tool path and improve machining efficiency of short line segments, this paper presents an optimal feed interpolator based on G 2 continuous Bézier curves for the linear tool path. First, the areas suitable for fitting are screened out based on the geometric characteristics of continuous short segments (CSSs). CSSs in every area are compressed and fitted into a G 2 Continuous Bézier curve by using the least square method. Then a series of cubic Bézier curves are generated. However, the junction between adjacent Bézier curves is only G 0 continuous. By adjusting the control points and inserting Bézier transition curves between adjacent Bézier curves, the G 2 continuous tool path is constructed. The fitting error is estimated by the second-order Taylor formula. Without iteration, the fitting algorithm can be implemented in real-time environment. Second, the optimal feed interpolator considering the comprehensive constraints (such as the chord error constraint, the maximum normal acceleration, servo capacity of each axis, etc.) is proposed. Simulation and experiment are conducted. The results shows that the proposed method can generate smooth path, decrease the amount of segments and reduce machining time for machining of linear tool path. The proposed research provides an effective method for high-speed machining of complex 2-D/3-D profiles described by short line segments. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Section: Introductionmentioning

confidence: 99%

“…An optimization problem needs to be solved to estimate the proper transition lengths. Zhao et al [6] proposed a method for smoothing the linear tool path by using two transition cubic Bézier curves. One cubic Bézier curve smoothes the tool tip position path, and the other smoothes the orientation vector of tool axis.…”

Section: Introductionmentioning

confidence: 99%

An Optimal Feed Interpolator Based on G2 Continuous Bézier Curves for High-Speed Machining of Linear Tool Path

Jin

Zhao

Wang

2019

Chin. J. Mech. Eng.

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Fabrication of Biodegradable Polyurethane Foam Scaffolds with Customized Shapes and Controlled Mechanical Properties by Gas Foaming Technique

Han

Song

Choi

et al. 2021

Macro Materials & Eng

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Poly( -caprolactone) (PCL)-based polyurethane (PU) foam scaffolds with different mechanical properties are fabricated using a gas foaming technique to use as porous substitutes for ear or bone with cartilage. PCL diol or triol is used as a polyol in PU foam for biocompatibility and biodegradation, with an aqueous gelatin solution as a blowing agent. The highly porous inner and outer structures of the scaffolds are developed by employing a silicone surfactant and sulfuric acid, respectively. The PU scaffolds prepared by PCL diol show ductile and flexible properties, whereas the PU scaffolds prepared by PCL triol exhibit high compression strength. In vitro test reveals the low toxicity of the PU scaffolds and the high ALP activity of MC3T3-E1 cells in the PU scaffold prepared by PCL triol. By taking advantage of the difference in mechanical properties, customized PU scaffolds with ear or bone shapes are fabricated using a silicone mold. The PU scaffolds with two compartments of PCL diol and triol (corresponding to cartilage and bone, respectively) are fabricated as a substitute for bone with cartilage. It is believed that the PU scaffolds with highly porous structure and controlled mechanical properties have wide potential application for tissue engineering.

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An analytical G3 continuous corner smoothing method with adaptive constraints adjustments for five-axis machine tool

Zhang

Wang

Dong

et al. 2020

Int J Adv Manuf Technol

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A Corner Rounding and Trajectory Generation Algorithm for Five-axis Linear Toolpath

Cited by 7 publications

References 1 publication

An Optimal Feed Interpolator Based on G2 Continuous Bézier Curves for High-Speed Machining of Linear Tool Path

An Optimal Feed Interpolator Based on G2 Continuous Bézier Curves for High-Speed Machining of Linear Tool Path

Fabrication of Biodegradable Polyurethane Foam Scaffolds with Customized Shapes and Controlled Mechanical Properties by Gas Foaming Technique

An analytical G3 continuous corner smoothing method with adaptive constraints adjustments for five-axis machine tool

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