Characterising the effects of shape on tool path motion

Chanda, Luke; Cripps, Robert J.

doi:10.1016/j.ijmachtools.2018.04.005

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…Experimental results show that the resulting matched axial dynamics effectively eliminate the linear contour errors and largely reduce the circular contour errors due to unmatched axial dynamics. Chanda et al [27] provided a method that may be applied on any machine to characterise motion in terms of a tool path's intrinsic shape properties, this can help to reduce the material and energy resources being consumed during iterative machining trials and so improve the efficiency and productivity of the manufacturing process. Liu et al [28] placed a multi-robot system that consists of two welding robots and a clamping robot on a gantry with Three-Degree-of-Freedom, and established positive and negative kinematic models by the Devanit-Hartenberg(D-H) method, completed the welding path planning for aircraft hyperbolic panels, and verified the path in ADAMS.…”

Section: Introductionmentioning

confidence: 99%

Welding motion matching of tank with variable curvature section based on discrete planning method of welding torch posture

song¹,

Li²,

Wang³

et al. 2023

Preprint

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Welding path planning and motion matching of complex tanks are major areas of research for intelligent welding equipment. In the present work, the welding of tank with variable curvature section was taken as the study object, an innovative method to automatically generate the posture of welding torch at the welding spots of variable curvature section was proposed. The torch posture homogeneous transformation matrix was established, and the equation of welding motion matching on basis of the method of torch posture planning was constructed by combining the angle planning equation of the positioner. Then, a set of welding torch posture and positioner’s rotation angles along the welding path of variable curvature section was created in Matlab, and the combination code of the welding torch movement and positioner rotation was obtained to accurately control the welding speed, wire extension and the posture of welding torch during the welding process of the tank. An aluminum alloy tank composed of eight arcs was chosen to verify the proposed technique. The results show that the difference of welding position at the same positioner’s rotation angle ranged from -0.7976 mm to 0.7616 mm, the repeatability accuracy of the posture of the automatic welding system was less than 0.1 mm, and the weld qualification rate of aluminum alloy tank is more than 98% with limited weld defects. That is, the tanks with variable curvature sections can be automatically and accurately welded by the proposed method.

show abstract

Section: Introductionmentioning

confidence: 99%

Welding motion matching of tank with variable curvature section based on discrete planning method of welding torch posture

song¹,

Li²,

Wang³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The look-ahead window technique is used in [21], and [22] for smoothing the path-geometry corners to reduce the jerk magnitude in a CNC machine through the jerklimited acceleration profile, which consists of three phases: acceleration increment at continuous rate, followed by a constant acceleration, and a final deceleration at a sustained ratio. In [23], a method for characterizing a machine-tool trajectory movement is proposed based on the analysis and manipulation of velocity, acceleration, and jerk profiles. The approach is used for improving the manufacturing-process efficacy and productivity by lessening consumed resources as materials and energy during iterative machining tests; however, some discontinuities are noticed in the acceleration profile.…”

Section: Introductionmentioning

confidence: 99%

Novel Gaussian Acceleration Profile for Smooth Jerk-Bounded Trajectories

et al. 2022

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Industrial machines regularly work at their limits causing excessive long-term vibrations that deteriorate their movement, stability, and precision. In this sense, reference profiles are able to reduce the detrimental vibration effects by manipulating the machine motion dynamics using predefined movement trajectories. Most of the approaches for lessening damages due to long-term machine vibrations are based on polynomial functions with high computational complexity and high resources demand. Hence, in this work, an innovative acceleration outline based on a Gaussian function is proposed for machine motion trajectories. The introduced strategy simplifies the position-profile estimation that works as reference for restraining the machine movements through the parameters that define its motion dynamics; thus, a smooth and continuous jerk contour is produced, which reduces vibrations and improves the machine stability. Exhaustive computer-based and real-time experimental comparisons of the introduced scheme produces a significantly lower maximum jerk value than any of the others. The assessment of the presented approach was performed utilizing the software Matlab (R2020a) on a PC with an Intel Core i7-6500U microprocessor at 2.5 GHz, with 16 GB in RAM and a 64-bit operating system.

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Determination of the Tool’s Trajectory for the Manufacturing of the Profile of a Cam

Dragomir¹,

Stănescu

2018

Proceedings of the 4th International Congress of Automotive and Transport Engineering (AMMA 2018)

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Characterising the effects of shape on tool path motion

Cited by 9 publications

References 25 publications

Welding motion matching of tank with variable curvature section based on discrete planning method of welding torch posture

Welding motion matching of tank with variable curvature section based on discrete planning method of welding torch posture

Novel Gaussian Acceleration Profile for Smooth Jerk-Bounded Trajectories

Determination of the Tool’s Trajectory for the Manufacturing of the Profile of a Cam

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