Electrochemical machining of deep narrow slits on TB6 titanium alloys

Wei, Feng; Zhao, Jianshe; Lv, Yanming; Yang, Zhengang; Yao, Jun; He, Yuan; Tian, Zongjun

doi:10.1007/s00170-017-0392-0

Cited by 17 publications

(8 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reciprocating motion of the cathode can realize electrolyte pressure and velocity periodic variety in the inter-electrode gap, which are useful to renew the electrolyte and carry out electrolysis products in time. This result is in agreement with the reports by Hewidy [21] and Wang [22]. Hewidy et al reported the effect of electrolyte pressure and tool vibration on the disposal of the electrolysis products in different cathode positions.…”

Section: Simulation Of the Ordinary Flow Channels With Vibrationsupporting

confidence: 92%

Electrochemical Machining Multiple Slots of Bipolar Plates with Tool Vibration

Jiang¹,

Astronautics²

2018

International Journal of Electrochemical Science

View full text Add to dashboard Cite

A bipolar plate is an important component of proton exchange membrane fuel cells (PEMFC). The fabrication of multiple slots is a key part in preparation of metallic bipolar plates. They can be produced by electrochemical machining (ECM). During the ECM process, high flow resistance occurs with the increase of slots length and depth, which will make metal hydroxide and other by-products accumulate in the outlet of electrolyte and limit the maximum feed rate of cathode. Therefore, a flow channels contraction cathode structure with variable cross-section has been proposed. It can make the flow velocity of electrolyte increase gradually in the inter-electrode gap and take away electrolysis products better. In order to remove electrolysis products further, tool vibration is applied. The flow channels contraction cathode has been determined with numerical simulations, and the comparison experimental results show that the way is effective in improving the feed rate and ensuring the uniformity of slots depth.

show abstract

Section: Simulation Of the Ordinary Flow Channels With Vibrationsupporting

confidence: 92%

Electrochemical Machining Multiple Slots of Bipolar Plates with Tool Vibration

Jiang¹,

Astronautics²

2018

International Journal of Electrochemical Science

View full text Add to dashboard Cite

show abstract

“…The major advantage of non-conventional machining processes is that machining of any hardto-cut metal to high accuracy is possible regardless of the complexity of the shape. These processes can also be used for machining at both large and micro scales, but machining at micro scale may require additional accessory like in the case of wire or vibration assisted ECM [110,111] and jet-ECM [112]. Another non-conventional machining process that differs from the LBM, EDM and ECM is ultrasonic machining (USM) [113].…”

Section: Non-conventional Machiningmentioning

confidence: 99%

“…Similar to the EDM process, ECM could also be used to achieve machining at microscale regardless of the alloy type. Wang et al [111] showed that the combined use of NaCl and NaNO 3 could effectively be used for electrochemical machining of deep narrow slits on TB6 alloy. The authors developed a vibration apparatus which stabilized the process.…”

Section: Electrochemical Machiningmentioning

confidence: 99%

An overview of conventional and non-conventional techniques for machining of titanium alloys

et al. 2020

View full text Add to dashboard Cite

Machining is one of the major contributors to the high cost of titanium-based components. This is as a result of severe tool wear and high volume of waste generated from the workpiece. Research efforts seeking to reduce the cost of titanium alloys have explored the possibility of either eliminating machining as a processing step or optimising parameters for machining titanium alloys. Since the former is still at the infant stage, this article provides a review on the common machining techniques that were used for processing titanium-based components. These techniques are classified into two major categories based on the type of contact between the titanium workpiece and the tool. The two categories were dubbed conventional and non-conventional machining techniques. Most of the parameters that are associated with these techniques and their corresponding machinability indicators were presented. The common machinability indicators that are covered in this review include surface roughness, cutting forces, tool wear rate, chip formation and material removal rate. However, surface roughness, tool wear rate and metal removal rate were emphasised. The critical or optimum combination of parameters for achieving improved machinability was also highlighted. Some recommendations on future research directions are made.

show abstract

“…If the removal capacity is insufficient, the machining accuracy and surface quality will become poor. To obtain high machining accuracy and machining stability, Wang et al suggested electrochemical machining with vibration superimposed to improve the removal of sludge and hydrogen bubbles [ 16 ]. Bilgi et al proposed an ECM process with rotating electrode movement to enhance the uniformity of electrolyte flow and reduce or eliminate the flow field disrupting processes [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Milling of Deep-Narrow Grooves on GH4169 Alloy Using Tube Electrode with Wedged End Face

Qiu

Chen

2022

Micromachines

View full text Add to dashboard Cite

Deep-narrow grooves (DNGs) of nickel-based alloy GH4169 are extensively used in aerospace industry. Electrochemical milling (EC-milling) can manufacture special structures including DNGs by controlling the moving path of simple tool, showing a flexible process with the advantages of high machining efficiency, regardless of material hardness, no residual stresses, burrs, and tool wear. However, due to the inefficient removal of electrolytic by-products in the inter-electrode gap (IEG), the machining accuracy and surface quality are always unsatisfactory. In this paper, a novel tube tool with wedged end face is designed to generate pulsating flow field in IEG, which can enhance the removal of electrolytic by-products as well as improve the machining quality of DNG. The flow field simulation results show that the electrolyte velocity in the IEG is changed periodically along with the rotation of the tube tool. The pulsating amplitude of electrolyte is changed by adjusting the wedged angle in the end face of the tube tool, which could affect the EC-milling process. Experimental results suggest that the machining quality of DNG, including the average width, taper of sidewall, and surface roughness, is significantly improved by using the tube tool with wedged end face. Compared with other wedged angles, the end face with the wedged angle of 40° is more suitable for the EC-milling process. DNG with the width of 1.49 mm ± 0.04 mm, taper of 1.53° ± 0.46°, and surface roughness (Ra) of 1.04 μm is well manufactured with the milling rate of 0.42 mm/min. Moreover, increasing the spindle speed and feed rate can further improve the machining quality of DNG. Finally, a complex DNG structure with the depth of 5 mm is well manufactured with the spindle speed of 4000 rpm and feed rate of 0.48 mm/min.

show abstract

Electrochemical machining of deep narrow slits on TB6 titanium alloys

Cited by 17 publications

References 24 publications

Electrochemical Machining Multiple Slots of Bipolar Plates with Tool Vibration

Electrochemical Machining Multiple Slots of Bipolar Plates with Tool Vibration

An overview of conventional and non-conventional techniques for machining of titanium alloys

Electrochemical Milling of Deep-Narrow Grooves on GH4169 Alloy Using Tube Electrode with Wedged End Face

Contact Info

Product

Resources

About