WEBarticle{WuResearchOT, title={Research on the directionality of end dynamic compliance dominated by milling robot body structure and milling vibration suppression}, author={Jiawei Wu and Xiao Qi Tang and Shihao Xin and Chenyang Wang and Fangyu Peng and Rong Yan}, journal={Robotics Comput. Integr.
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WEBJan 1, 2022 · Experimental results show that based on the milling acoustic signal's harmonic amplitude, the milling depth is monitored with a resolution of mm within the safe measurement range of the ...
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WEBJan 6, 2016 · In this experiment, the milling machine cuts two grooves on the aluminium plate with the following cutting parameters: speed 585 r/min; feed rate 60 mm/min and cut depth 2 mm. The experimental vibration responses are analyzed and compared in Figure 10 by frequency spectrum, energy histograms and timefrequency waterfall diagram. It .
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WEBAug 1, 2021 · Moreover, the four supporting legs of the AGV, seven links of the robot, the gripper, and the workpiece are all rigid body elements with one input end and one output end, which are numbered as 2,5 ...
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WEBNov 1, 2021 · The CM and LTUVM experiments were conducted in a selfdeveloped ultrasonicassisted precision machining center (threeaxis THU ULTRASONIC 850) (Fig. 3 a).The UDAFRPs specimen was fixed using a special jig (Fig. 3 b), which was mounted on a dynamometer (Kistler 9119A) equipped with a data acquisition board (Kistler 5697A) .
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WEBFeb 20, 2019 · Milling is a kind of interrupted cutting. When the tool cuts into the workpiece, it is often accompanied by instantaneous impact, which results in impact vibration of the milling system.
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WEBNov 3, 2019 · extracted from the milling vibration signals, including. mean, peak, RMS, variance, kurtosis, and skewness. So, there are 18 timedomain features and all could be. ... and the grid search.
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WEBJun 5, 2022 · With the increasing of the milling time from 0 to 120 min, the RhB dye decomposition ratio of BaTiO 3 nanofibers first increases and then decreases. When the milling time is 30 min, for the 20 min vibration time, the RhB decomposition ratio of BaTiO 3 is 94%, which is much higher than that (~65%) of the unmilled BaTiO 3. 2. .
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WEBJan 1, 2019 · The primary focus of the vibration modeling research in robotic milling has been on adopting the chatter analysis meth ods that are commonly used for traditional machining systems [5]. Wang et al. [6] showed that mode coupling mechanism, caused by flexible low frequency modes of the robot structure, is the dominant source of vibrations .
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WEBJan 20, 2015 · For the resonance vibration, the external excitation frequency caused by the milling force is supposed to be the same as the natural frequency 98 Hz of the workpiece/fixture. Conclusions. The twoDOF TMD demonstrates better performance than single SDOF and two SDOF TMDs with equal mass in the vibration mitigating.
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WEBFeb 15, 2024 · It can be seen that the vibration is significantly reduced during the milling process. The maximum vibration displacement is no higher than μm, reduced by %, which indies that the workpiece with the optimal interfacial structure has a significant suppression effect on cutting vibration in milling of thinwalled part with a ...
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WEBFeb 4, 2011 · In the conventional use of vibration assisted machining, vibratory motion is mostly applied to the continuous machining processes such as turning where the cutting speed is much lower than the vibration speed. Even the recent articles on vibration assisted milling processes are also quite limited to low spindle speed less than 3k RPM. .
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WEBJun 1, 2014 · (2) when tooth pass frequencies are far away from the natural frequencies of system, that is π<θ<2π, the selfexcited vibration exists, and ω c,j =ω n,j (1+ζ).In particular, when θ=3π/2, regenerative cutting force, Eq. (2), is the largest, and milling system is the most unstable when relative phase θ equals to 3π/2. In other words, the .
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WEBApr 16, 2022 · In the milling process, the friction and wear of the tooth minor flank of the square shoulder milling cutter directly affects the machined surface quality and the cutter's life. The friction of the minor flank of the cutter tooth presents a nonlinear distribution, and its variation cannot be revealed by using a single parameter. It is difficult to identify the .
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WEBTypical methods to reduce chatter include reducing cutting forces by: Reducing the number of flutes. Decreasing the chipload per tooth by reducing the feed or increasing the speed or RPM. Reducing the axial or radial depth of cut. Though these steps will reduce chatter, slowing down the cutting process is not always the best course of action ...
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WEBAug 24, 2020 · Milling surface quality is an important factor to assess the performance of a product, which is usually affected by cutting parameters. This paper presents a novel model of peripheral milling surface topography considering tool vibration. The model used the idea of discretization by introducing the milling dynamics and ignored the effect of tool .
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WEBDec 17, 2019 · The experimental results of face milling 20% SiC p /Al composites showed that better surface quality could be obtained with larger cutting speed and smaller feed rate . In recent years, ultrasonic vibration–assisted machining has been recognized by the world because it can reduce the cutting load and improve the surface quality effectively .
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WEBAug 24, 2022 · Chatter is an uncontrollable and unattenuated vibration that results in large oscillations between the workpiece and the cutting tool and has a detrimental effect on the surface quality, the tool life and the health of the machine tool components. As a result, it is one of the key limitations that hinders the productivity and quality of the milling process .
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WEBJan 4, 2020 · Large thinwalled parts are widely utilized in many different fields such as aircraft manufacturing. However, the vibration caused by the milling force during processing unfortunately affects the processing quality. To reduce the vibration, a multipoint flexible following support head is proposed, which can adjust the supporting .
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WEBApr 1, 2023 · According to the above results, the stiffness values of boundary springs under some boundary conditions adopted in this paper are given under the boundary of x = 0, as shown in Table 2, where F, C, S, SD, E1, E2, E3 represent the free edge, clamped edge, simply supported edge, sheardiaphragm edge, and three elastic edges, .
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WEBNov 1, 2021 · A distinct influence of vibrationassistance on the abrasive and adhesive wear of the micro end mills is visible: The tools used for micro milling without vibrationassistance show significantly more tool wear of the main cutting edge and corner.
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WEBDOI: / Corpus ID: ; Friction characterization of SiCp/Al composites by 3D ultrasonic vibrationassisted milling article{Xiang2024FrictionCO, title={Friction characterization of SiCp/Al composites by 3D ultrasonic vibrationassisted milling}, author={Daohui Xiang and Jinglong Sang and Pei .
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WEBSep 7, 2021 · Elliptical ultrasonic vibrationassisted milling (EUVAM) is widely used as an efficient processing method for hardtomachining materials such as titanium alloy, superalloy, and hardbrittle materials. To uncover the mechanism of the intermittent cutting characteristics in EUVAM, the toolworkpiece contact rate model is developed by .
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