Characterization of Thrust Force, Temperature, Chip Morphology and Power in Ultrasonic-assisted Drilling of Aluminium 6061

10.21203/rs.3.rs-441144/v1 ◽

2021 ◽

Author(s):

Amin Moghaddas

Keyword(s):

Feed Rate ◽

Thrust Force ◽

Chip Morphology ◽

High Amplitude ◽

Spindle Speed ◽

Drilling Parameters ◽

Out Of Sample ◽

Ultrasonic Assisted ◽

Turning Center ◽

Chip Size

Abstract In this study, a special resolution V design and Response surface methodology (RSM) were used to characterize the ultrasonic-assisted drilling (UAD) process of Aluminum 6061. This characterization was done through developing mathematical models to study the effect of ultrasonic and drilling parameters including spindle speed, feed rate and amplitude on thrust force, temperature, chip morphology and power. The tests were done using an industrially hardened non-rotating UAD system mounted in a CNC turning center. The analysis of variance (ANOVA) was used to find significant parameters of thrust force, temperature, chip morphology and power. Then, for all responses, the optimum drilling parameters that provide desired solutions for all responses were obtained. This was followed by out-of-sample testing to verify the accuracy of the developed models. The results of this study showed that in UAD of aluminum, the minimum values of thrust force and chip size were obtained at low spindle speed, low feed rate and high amplitude. The results also showed that amplitude was not a significant parameter affecting the tool temperature and cannot be used to analyze the effect of ultrasonic vibrations on generated heat during UAD. Instead, the interaction of amplitude and feed rate was significant and should be considered in the analysis. Finally, minimum consumed power, specially at higher amplitudes, can be obtained using high spindle speed and low feed rate.

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Study on ultrasonic-assisted drilling of Ti6Al4V using 3-flute drill in the finite element simulation

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219893001 ◽

2019 ◽

Vol 234 (7) ◽

pp. 1298-1310 ◽

Cited By ~ 1

Author(s):

Peng Wang ◽

Dazhong Wang

Keyword(s):

Finite Element ◽

Tool Wear ◽

Thrust Force ◽

Chip Thickness ◽

Chip Morphology ◽

Drilling Process ◽

Wear Depth ◽

Drill Bit ◽

Drilling Parameters ◽

Ultrasonic Assisted

Continuous chip is one of the major problems during drilling Ti6A14V, and chip breaking is dependent on many factors such as drilling parameters, tool geometries and type of drill bits used. This paper attempts to analyze the effect of various drilling parameters such as feed rate, spindle speed on performance characteristics such as chip morphology, thrust force, temperature, and tool wear in conventional drilling and ultrasonic-assisted drilling of Ti6A14V using twist drill bit and 3-flute drill bit in order to optimize the chip breakability of Ti6A14V. The twist and 3-flute drill bit are utilized to establish the finite element models to simulate the drilling process with Lagrangian approach in DEFORM-3D software. The results of the simulations not only reveal obvious varying regular pattern of thrust force, temperature, tool wear depth, chip thickness and damage with the increasing of feed rates, spindle speeds, which confirm the capability and advantage of finite element model of the drilling process, but also provide a more profound knowledge about the drilling mechanism including the effect of 3-flute drill bit in ultrasonic-assisted drilling on chip breakability and tool wear.

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Fractionation and characterization of thermal extracts from lignite under ultrasonic-assisted extraction

Carbon Resources Conversion ◽

10.1016/j.crcon.2021.07.001 ◽

2021 ◽

Author(s):

Xin Zha ◽

Shibiao Ren ◽

Tao Jiang ◽

Jingchong Yan ◽

Zhicai Wang ◽

...

Keyword(s):

Assisted Extraction ◽

Ultrasonic Assisted ◽

Ultrasonic Assisted Extraction

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CHARACTERIZATION OF ULTRASONIC ASSISTED ADHESIVE JOINTS

Acta Polytechnica CTU Proceedings ◽

10.14311/app.2016.3.0051 ◽

2016 ◽

Vol 3 ◽

pp. 52-55 ◽

Cited By ~ 2

Author(s):

Rainer Pauska ◽

Umut Cakmak ◽

Rainer Lottes ◽

Zoltan Major

Keyword(s):

Carrying Capacity ◽

Adhesive Joints ◽

Ultrasonic Waves ◽

Load Carrying Capacity ◽

Lap Joint ◽

Shear Tests ◽

Load Carrying ◽

Ultrasonic Assisted ◽

Joint Shear

Joining experiments using different adhesives were carried out. In addition to the adhesive, the specimens were also treated with ultrasonic waves to improve the load carrying capacity of the joined parts. Lap joint shear tests have been conducted to quantify this improvement.

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Preparation and Characterization of Spherical Submicron CL-20 by Siphon Spray Refinement

Journal of Nanomaterials ◽

10.1155/2020/2394698 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Jiangtao Xing ◽

Weili Wang ◽

Wenzheng Xu ◽

Tianle Yao ◽

Jun Dong ◽

...

Keyword(s):

Impact Sensitivity ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Crystal Forms ◽

Refined Method ◽

Diffraction Angle ◽

Ultrasonic Assisted ◽

The Impact ◽

Thermal Stability Of

In order to improve the safety of hexanitrohexaazaisowurtzitane (CL-20), submicron CL-20 particles were prepared by a siphon ultrasonic-assisted spray refining experimental device. The samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC), and the impact sensitivity of the samples was tested. The results show that the particle size of siphon-refined CL-20 is about 800 nm~1 μm, which is more smooth, mellow, and dense than that of CL-20 prepared by a traditional pressure-refined method. The peak diffraction angle of pressure- and siphon-refined CL-20 is basically the same as that of raw CL-20, and their crystal forms are ε type. The peak strength of pressure- and siphon-refined CL-20 decreased obviously. The apparent activation energy of pressure-refined CL-20 and siphon-refined CL-20 is 13.3 kJ/mol and 11.95 kJ/mol higher than that of raw CL-20, respectively. The thermal stability of CL-20 is improved. The activation enthalpy (ΔH#) is significantly higher than that of raw CL-20, and the characteristic drop is 70.4% and 82.7% higher than that of raw CL-20. The impact sensitivity of siphon-refined CL-20 is lower than that of pressure-refined CL-20, so the safety performance of an explosive is improved obviously.

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