Direct computation of instantaneous cutting force in real-time multi-axis NC simulation

Yau, Hong-Tzong; Wang, Szu-Yuan; Chang, Han-Chung; Chang, Chia-Hao

doi:10.1007/s00170-021-08545-7

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…( 56), the engangment angle 𝜙 between the entry angle 𝜃 𝑠𝑡 and the exit angle 𝜃 𝑒𝑥 is calculated. In cutting simulation, we adopt a direct computation of cutting force method [23] and analyze the cutting force of each point on the layer along the Z axis of the cutter. According to the trochoidal tool path trajectory, the differential rotating angle, and the instantaneous chip thickness, the instantaineous cutting force is evaluated using the following mechanistic model [21]:…”

Section: Cutting Force Simulationmentioning

confidence: 99%

A double-NURBS approach to the generation of trochoidal tool path

Chang

Ming

Yau

2023

Int J Adv Manuf Technol

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Trochoidal milling becomes a popular strategy in high-speed rough milling, thanks to its advantages in lowering cutting force (and tool wear) and increasing tool life. However, it also suffers from the disadvantages of low cutting efficiency and prolonged machining time due to its reduced cutter-workpiece engagement in the cutting area and the idle tool path in the non-cutting area. In this paper, a new trochoidal tool path generation method is proposed based on a double-NURBS curve. Unlike traditional circular trochoidal tool path that combines circular and linear paths to approximate the trochoidal path, the double-NURBS tool path can truly represent a trochoidal path with C 2 continuity throughout the entire tool path. In the front cutting area, the control points of the NURBS are modified to increase the cutter-workpiece engagement angles; in the rear non-active area, the NURBS curve is modified to shorten the non-cutting distance and the machining time. Degree elevation of the NURBS circle from 2 to 3 maintains C 2 continuity to ensure the machining is smooth throughout all transitions. Cutting force simulations and pocket machining experiments are carried out to validate that the proposed double-NURBS approach deliver the expected result and performance.

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Section: Cutting Force Simulationmentioning

confidence: 99%