Model for the prediction of low-frequency lateral vibrations in drilling process with pilot hole

Jiménez, Amaia; Arizmendi, M.; Cumbicus, Wilmer E.

doi:10.1007/s00170-018-1671-0

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…The cutting damping force is caused by the interference between the uneven workpiece surface caused by the tool vibration and the tool flank surface, which causes the effective flank angle α ef f (as shown in Figure 4a) to change. Literature [31] mentioned that the cutting damping force is composed of the normal force F dv and the friction force F du , and the normal force F dv is proportional to the volume V of the workpiece material extruded under the flank face of the cutting edge:…”

Section: Cutting Damping Forcementioning

confidence: 99%

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Mathematical Model for Tapping Simulation to Predict Radial Pitch Diameter Difference of threads

Ren

Yan

2021

Preprint

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As the most important component of parts, thread has a great influence on the mechanical properties and service performance of parts. In order to ensure the quality of the thread, the thread quality inspection standard involves 11 main thread characteristics, of which the surface roughness of the thread is the most studied, and the research on Radial Pitch Diameter Difference (RPDD) is still blank. In this paper, a quasi-static model of the tapping process is developed based on the roundness error mechanism of the hole, which includes cutting force and cutting damping force. Due to the regenerative nature of cutting, the force on each cutting edge depends on both the tool’s current position and previous position. According to the eigenvalues and eigenvectors of the discrete state-transition matrix, RPDD is finally determined, and the influence of the chamfer length and the spindle speed on RPDD is simulated by this model. The results demonstrate that the chamfer length and spindle speed will affect RPDD, and the RPDD is the smallest when the chamfer length is 2 threads and the spindle speed is 1400 rev/min. The development of this model not only provides a cheap and effective method for the study of RPDD, but also lays a foundation for further experimental research.

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Section: Cutting Damping Forcementioning

confidence: 99%

“…Like the method of obtaining the cutting force, the tangential ∆F dx , radial ∆F dy and axial ∆F dz components of the cutting damping force can be expressed as: (31) through simplification, Equation 31 can be expressed as:…”

Section: Cutting Damping Forcementioning

confidence: 99%