Experimental analysis of axial and torsional vibrations assisted tapping of titanium alloy

Pawar, Sanjay; Joshi, Suhas S.

doi:10.1016/j.jmapro.2016.01.006

Cited by 19 publications

(5 citation statements)

References 19 publications

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“…In 2014, Chen [ 9 ] aimed to analyze the difference of stainless (SUS316L) microtubes in the flaring forming among dies with various semicone angles. Pawar and Joshi [ 10 ] found that when tapping small-diameter internal threads on titanium alloys, the wire taps often broke suddenly. Therefore, they set up an extensive experiment to study the tapping mechanism and the performance of axial vibration-assisted tapping (AVAT) and torsional vibration-assisted tapping (ATVAT) for titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Micro-Machining Process for External Thread of Micro Round Tube

2021

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This study aims to analyze the stainless steel micro round tube external threading process for the influence of different outer threading pitches (0.25 mm, 0.4 mm) and outer diameters (Ø1.9, Ø1.94, Ø2). This study also analyzes the effects of different friction factors (0.1, 0.3, 0.5, 0.7, and 0.9) and different tube thicknesses (0.4, 0.45, 0.5, 0.55, and 0.6 mm) on the threading process. This study considers size effect to use corrected material parameters for the microtube to conduct the finite element analysis by DEFORM-3D software. The goal is to understand stainless steel (SUS304) micro round tube threading and the difference by using macro material parameter analysis. The historic forming data from the simulation and experiment of threading processing are presented, and the corresponding stress/strain distribution and thread shape are also calculated. The experiment results are compared to the simulation results to verify the reliability of this analysis method. The result shows that the torque/stress/strain obtained by the modified model is always lower than by Swift’s model. It means that the size effect can be considered to apply on the forming process and provided proper torque to form the external thread of the micro round tube, e.g., the maximum torque of the round die for M2 × 0.25 occurs over the fourth stroke. For the influence of the outer diameter of the micro round tube, the larger diameter induces the larger maximum torque on the round die for M2 × 0.4, but for the smaller pitch of M2 × 0.25, the larger maximum torque is not influenced by the diameter of the tube. When the pitch of the round die is increased, the torque, stress and strain are also increased relatively. As the friction factor and torque between the round die and tube increase, the stress and strain become lower. Changing the tube thickness will not significantly change the torque, the stress, and the strain. These results guide the simulation and experiment of optimized micro round tube threading development and design to reduce cost and increase product quality.

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Section: Introductionmentioning

confidence: 99%

Analysis of Micro-Machining Process for External Thread of Micro Round Tube

2021

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“…Aiming at the sudden breaking problem of the threads when tapping the mini-diameter internal threads of the titanium alloy, Swapnil Pawar and Suhas S. Joshi [12] proposed a comprehensive experiment in 2016 to study the tapping mechanism and performance of the Axial Vibrating Auxiliary Tapping (AVAT) and Axial Torsional Vibrating Auxiliary Tapping (ATVAT) that will be applied to the titanium alloy. They discovered that without affecting the thread mass, the AVAT and ATVAT can reduce the tapping torque, axial force, and temperature that traditional tapping cannot achieve (CT).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Micro-type Circular Rod Screw Thread Machining Process

Chen

Ting

Wang

2021

Preprint

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The main purpose of this research is to study the analysis of the screw thread machining process for micro-type circular rods. During the analysis, the SUS304 stainless steel micro-type circular rod is used to analyze the micro thread machining process for the circular rod that will be fabricated according to varied outer diameters (Ø1.9mm, Ø1.94mm and Ø2mm), varied pitches (0.25mm and 0.4mm), and specific friction factors (0.1, 0.2, 0.3, 0.5 and 0.7). Through the micro material parameters with scale factors being corrected, the finite element analysis is conducted in order to learn about the effect of pitches and friction factors on the screw threads of the micro-type circular rod during the machining process. During the research, the finite element analysis was also conducted through the use of full integration rule and by coupling the shape function, as being inferred from the 3D tetrahedral element with 4 corner nodes, in the stiffness matrix. This research focuses on the simulation of comprehensive forming resume data, stress/strain distribution and thread shape distribution relating to the thread machining process for the micro-type circular rod. In the meantime, the micro-type circular rod screw thread machining die is also designed for carrying out the micro-type thread machining experiment for the SUS304 micro-type circular rod. The outcome is also compared with the simulation result to verify the reliability of the aforesaid analysis method. During the research, the difference between traditional material parameters and that of the corrected micro dimensions is also analyzed with the result provided below: The simulation result of the corrected material parameters indicated that the maximum principal stress tends to grow along with the enlarging of the pitch, but there isn’t a visible difference between the maximum principal strain and the material parameters being used before and after the modification. When the friction factors are changing during the micro-type circular rod screw thread machining process, its torsional, stress, and strain force tends to grow along with the increase of friction factors.

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“…(11) In 2014, Li studied the effect of micro thread tapping on a thin stainless steel plate (SUS304) to analyze the dependence of the thread tapping quality on the thread tapping torque and the post-rolling area. (12) To address the problem of the sudden breaking of threads when tapping mini-diameter internal threads of a titanium alloy, Pawar and Joshi (13) performed a comprehensive experiment to study the tapping mechanism and the performance of axial vibrating auxiliary tapping (AVAT) and axial torsional vibrating auxiliary tapping (ATVAT) when applied to a titanium alloy. They discovered that, without affecting the thread mass, AVAT and ATVAT can reduce the tapping torque, axial force, and temperature compared with those of traditional tapping.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Simulation Analysis of Micro-type Circular Rod Screw Thread for SUS304 Stainless Steel in Machining Process

Chen¹,

Ting²,

Wang³

2021

Sensors and Materials

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The main purpose of this study is to analyze the screw thread machining process for microtype circular rods of SUS304 stainless steel. During the analysis, micro-type circular rods with various outer diameters (1.9, 1.94, and 2 mm), pitches (0.25 mm and 0.4 mm), and friction factors (0.1, 0.2, 0.3, 0.5 and 0.7) are fabricated. Owing to the micro scale of the thread, the scale factor of the material should be corrected, and finite element analysis is conducted to determine the effect of the pitch and friction factor on the screw threads of the micro-type circular rods during the machining process. The finite element analysis uses a full integration rule to couple the shape function, which is inferred from the 3D tetrahedral element with four corner nodes used in the stiffness matrix. Then, we simulate the comprehensive forming history and determine the stress/strain distribution and thread shape distribution relating to the thread machining process for the micro-type circular rod. A micro-type circular rod screw thread machining die is also designed to carry out an experiment on micro-type thread machining for SUS304 micro-type circular rods. The result is compared with the simulation result to verify the reliability of the analysis method. The difference between the uncorrected material parameters and the corrected microscale dimensions is also analyzed. The corrected material parameters indicate that the maximum principal stress sensed in the experiments increases with the pitch. During the microtype circular rod screw thread machining process, the torque, stress, and strain increase with the increase in the friction factor.

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Experimental analysis of axial and torsional vibrations assisted tapping of titanium alloy

Cited by 19 publications

References 19 publications

Analysis of Micro-Machining Process for External Thread of Micro Round Tube

Analysis of Micro-Machining Process for External Thread of Micro Round Tube

Analysis of the Micro-type Circular Rod Screw Thread Machining Process

Experiment and Simulation Analysis of Micro-type Circular Rod Screw Thread for SUS304 Stainless Steel in Machining Process

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