Repeatability of on-machine probing by a five-axis machine tool

Sepahi-Boroujeni, Saeid; Mayer, Josef; Khameneifar, Farbod

doi:10.1016/j.ijmachtools.2020.103544

Cited by 27 publications

(11 citation statements)

References 25 publications

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“…The performance of a precision device or manufacturing machine is highly affected by its rotating accuracy and various industry demands on on-machine measurement technology. 1–7 For the precision evaluation of the rotational performance of a spindle, five-degrees-of-freedom (5-DOF) error motion components should be measured accurately using the runout data of the rotational parts. 1,8–15 However, the runout data obtained from artifacts, which are widely used for the precision measurement of rotational error motions, contain form error signals of the artifacts’ surfaces.…”

Section: Introductionmentioning

confidence: 99%

Measurement of five-degrees-of-freedom spindle error motion using multi probe error separation

Baek

Hwang

Cho

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Herein, a precision measurement method is proposed to evaluate the radial, axial, and tilt error motions of rotating devices such as precision spindles. To improve the accuracy of the estimated multiple-degree-of-freedom error motion components, form error signals in the runout signals are separated and precompensated for before the calculation of the five-degrees-of-freedom error motion components. Fourier model-based multi probe error separation (MPES) techniques, which can prevent the occurrence of harmonic distortions, are applied to separate the form error signals. A three-probe method is applied to layers on the side surface of the cylindrical artifact, and a modified two-probe method is developed and applied to the upper surface. The radial, tilt, and axial error motions are calculated using the runout signals that do not contain the separated form error signals. The measurement system uses eight capacitive probes to detect the runout signals of the cylindrical artifact mounted at the center of the rotating device. To compare the proposed method with the five-probe-based conventional measuring method, an evaluation test simulation is conducted repeatedly five times. Results indicate that the proposed MPES method calculated the uncertainty using the deviation between the computed results from the existing and novel methods; additionally, the input signal in terms of the radial, tilt (layers 1 and 2), and axial error motions are [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text], respectively. It is confirmed that the undesirable effects of the form error signals are successfully removed and that the accuracies of the measured spindle error motion components improve.

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Section: Introductionmentioning

confidence: 99%

Measurement of five-degrees-of-freedom spindle error motion using multi probe error separation

Baek

Hwang

Cho

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…The implementation of CDT is possible provided that the machine tools can be used to make reliable measurements of parts between successive machining operations and after their completion [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…The efforts of some researchers are directed towards the search for universal methods, while others try to solve the problem for selected cases, and these are usually applied works. In article [ 9 ], the authors searched for a general model to evaluate measurement repeatability for a five-axis machine in any measurement situation. In articles [ 1 , 4 ], the authors implemented on-machine measurements to gain information about machining quality and adjust the milling process.…”

Section: Introductionmentioning

confidence: 99%

Geometric Measurements on a CNC Machining Device as an Element of Closed Door Technology

Bomba¹,

Ornat²,

Gierlak

2021

Sensors

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The article discusses the quality testing of a measuring system consisting of a CNC machine with measuring probes. The research was conducted in a broader context regarding the implementation of the closed door technology, i.e., production without human intervention, in an aviation plant manufacturing aircraft gearbox systems. This technology may involve automated measuring operations performed in machining centers, and not in measuring laboratories, provided that the quality of the measurements is appropriate. The aim of the study was to investigate whether the CNC machining device can be used to measure the geometric features of aircraft gearbox housing. For this purpose, measurement experiments were carried out with the use of three different probes. Measurements were carried out using four sequences of increasing complexity, so that, after error analysis, it was possible to find the causes of possible irregularities. A reference ring with known dimensions and position in the working space of the machine was used for the measurements performed as part of the assessment of the measurement system. The quality of the measurements was evaluated with the use of repeatability and reproducibility testing and statistical process control. The analysis results showed that the tested measurement system ensures adequate accuracy and repeatability, and the measurement process is characterized with adequate efficiency in relation to the manufacturing tolerance of the components produced using the machine. Thus, it was proven that the measurement process can be carried out on a machining device, which enables its integration into the closed door technology.

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“…[1] On-machine measurement with a touching probe (OMP) is mostly used in the machining process due to its high measuring accuracy and easy implementation. [2] The schematic of OMP system is presented in Fig. 1, in which once the probe touches the part along the measuring direction, a signal is sent from the probe and is received by the wireless interface.…”

Section: Introductionmentioning

confidence: 99%

Collision-Free Path Planning for Efficient Inspection of Free-Form Surface by Using a Trigger Probe

Zhao¹,

Li²,

Fu³

et al. 2021

Advances in Transdisciplinary Engineering

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Measurement path planning plays an essential role in on-machine measurement, which is often required to be time-saving and collision-free. This paper proposes a novel path planning methodology and develops an automatic collision avoidance strategy for measurement. Measurement points are generated by Contour section sampling (CSS), Grid mesh sampling (GMS), and Locally dense sampling (LDS) on the free-form surface. Afterwards, a shortest path algorithm (SPA) and a non-interference path algorithm (NIPA) are developed respectively. The simulations show that the proposed method can reduce the total inspection distance to nearly 7.82% than the original one. The presented path planning method can measure the surface of large aerospace parts directly by using a trigger probe.

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Repeatability of on-machine probing by a five-axis machine tool

Cited by 27 publications

References 25 publications

Measurement of five-degrees-of-freedom spindle error motion using multi probe error separation

Measurement of five-degrees-of-freedom spindle error motion using multi probe error separation

Geometric Measurements on a CNC Machining Device as an Element of Closed Door Technology

Collision-Free Path Planning for Efficient Inspection of Free-Form Surface by Using a Trigger Probe

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