Surface texturing by turning process using circular driven rotary tool with multiple cutting edges

2014 ◽  
Vol 15 (6) ◽  
pp. 1137-1142 ◽  
Author(s):  
Sy Quy Nguyen ◽  
BoHung Kim ◽  
Hyeong-Ho Yu ◽  
Sung-Tae Hong ◽  
Kyu Yeol Park
Keyword(s):  
Surface Texturing ◽  
Turning Process ◽  
Rotary Tool

Computational fluid dynamic study on the tribological performance of dimple-textured surface fabricated using the turning process

2019 ◽  
Vol 71 (4) ◽  
pp. 594-602 ◽  
Author(s):  
Haniff Abdul Rahman ◽  
Jaharah A. Ghani ◽  
Wan Mohd Faizal Wan Mahmood ◽  
Mohammad Rasidi Mohammad Rasani
Keyword(s):  
Pressure Distribution ◽  
Load Capacity ◽  
Surface Texturing ◽  
Tribological Performance ◽  
Future Application ◽  
Textured Surface ◽  
Turning Process ◽  
Equal Distribution ◽  
Content Type ◽  
First Case

Purpose This study aims to simulate the influence of surface texturing produced via turning process toward pressure distribution and load capacity generation using computational fluid dynamics (CFD). Design/methodology/approach The dimple geometry was obtained via turning process, to be used for future application on piston skirt surfaces. Two cases were studied: a preliminary study using single periodic dimple assuming linear dimple distribution and an application study using multiple periodic dimples to address actual dimple orientation following the turning process. Findings For the first case, the dimple was proven to generate load capacity with regard to untextured surface, owing to the asymmetric pressure distribution. Increasing the Reynolds number, dimple width and dimple depth was found to increase load capacity. For the second case, although load capacity increases via surface texturing, the value was 97.4 per cent lower relative to the first case. This confirmed the importance of doing multiple dimple simulations for real applications to achieve more realistic and accurate results. Originality/value A new concept of dimple fabrication using a low-cost turning process has been developed, with a potential to increase the tribological performance under hydrodynamic lubrication. Previous CFD simulations to simulate these benefits have been done using a single periodic dimple, assuming equal distribution array between dimples. However, due to the different orientations present for dimples produced using turning process, a single periodic dimple simulation may not be accurate, and instead, multiple dimple simulation is required. Therefore, present research was conducted to compare the results between these two cases and to ensure the accuracy of CFD simulation for this type of dimple.

Parametric study and multicharacteristic optimization of rotary turning process assisted by longitudinal ultrasonic vibration

2016 ◽  
Vol 231 (5) ◽  
pp. 978-991 ◽  
Author(s):  
Saeid Amini ◽  
Reza Teimouri
Keyword(s):  
Surface Roughness ◽  
Optimal Parameter ◽  
Parameter Setting ◽  
Turning Process ◽  
Rotary Tool ◽  
Relational Analysis ◽  
Cutting Velocity ◽  
Rotary Speed ◽  
Grey Relational ◽  
Selection Of

Turning with rotary tool is a newly developed alternative of the conventional turning process in which cutting edge of a round insert rotates about its axis, so that a continuously indexed cutting edge is fed into the cutting zone. In the present study, a longitudinal high-frequency vibration was superimposed to the rotary tool to analyze the cutting force and surface roughness of AA7075 during orthogonal cutting. However, due to contribution of wide ranges of factors in the vibratory-rotary turning process, the selection of optimal parameter setting is a challenge that is faced with this process. In the present work, an attempt was made to simultaneously minimize machining force ( Fz) and surface roughness ( Ra) through selection of the optimal setting of cutting velocity, feed rate, tool rotary speed in rotary turning, and vibratory-rotary turning operations. Here, grey relational analysis was used to find the optimal parameter setting in rotary turning and vibratory-rotary turning processes, separately. Then the obtained solutions were compared. Results indicated that applying axial vibration to the rotary tool turning significantly reduced both surface roughness and cutting force. From the optimization by the grey relational analysis method, it was obtained that for both rotary turning and vibratory-rotary turning operations, setting of 4 m/min cutting velocity, 220 r/min tool rotary speed, 0.08 mm/rev feed rate, and 0.3 mm depth of cut are the most-optimal solutions that causes minimum Fz and Ra, simultaneously. Also, the vibratory-rotary turning process had higher values of grey relational grade than the rotary turning process that implies outperformance of the vibratory-rotary turning with respect to the rotary turning process. The obtained results were then verified, compared, and discussed based on the mechanics of turning process.

IMPROVEMENTS IN MASKLESS ELECTROCHEMICAL SURFACE TEXTURING FOR CYLINDRICAL COMPONENTS

2019 ◽  
Author(s):  
Leonardo Conde Dias ◽  
Henara Costa ◽  
gabriel bacca ferri
Keyword(s):  
Surface Texturing

Improvement of thread turning process using micro-hole textured solid-lubricant embedded tools

2021 ◽  
pp. 095440542110199
Author(s):  
Salman Khani ◽  
Seyedhamidreza Shahabi Haghighi ◽  
Mohammad Reza Razfar ◽  
Masoud Farahnakian
Keyword(s):  
Surface Roughness ◽  
Mechanical Strength ◽  
Solid Lubricant ◽  
Operating Cost ◽  
Contact Length ◽  
Solid Lubrication ◽  
Turning Process ◽  
Micro Holes ◽  
Micro Hole ◽  
Cutting Inserts

In this paper, the thread turning of aluminum 7075-T6 alloy is studied using micro-hole textured solid-lubricant embedded carbide inserts. The primary focus of this work is to enhance the performance of the thread turning process for producing high quality threaded parts. To achieve this, micro-holes were generated by laser micro-machining on the rake face of tools and then, MoS2 and CNT (carbon nanotube) solid-lubricants were embedded into micro-holes. The effects of micro-holes and solid-lubrication on the performance of the thread turning process were examined using traditional tool ( T0), micro-hole textured tool ( T1), micro-hole textured MoS2 embedded tool ( T2), and micro-hole textured CNT embedded tool ( T3). In this study, cutting forces, chip-tool contact length, built-up edge (BUE), surface roughness, and operating cost were investigated. The influence of micro-hole generation on the mechanical strength of cutting inserts was evaluated using the finite element method. The results showed that the fabrication of the micro-holes on the rake surface of cutting inserts has no significant effect on the mechanical strength of the tools. The comparisons of our method with traditional tools demonstrated that the cutting performance improved in the threading process. Our results reveal that the main cutting force, radial thrust force, surface roughness, built-up edge, and chip-tool contact length reduced 37.1%, 40.9%, 37.9%, 58.3%, and 38.2%, respectively, as T3 tools are applied in this process. A cost analysis, based on estimated tooling costs, showed that the T3 tool can yield an 18% reduction in overall operating cost.

Sign in / Sign up

Export Citation Format

Share Document