Electric discharge texturing of HSS cutting tool and its performance in dry machining of aerospace alloy

Abstract

Conventional machining processes face several problems pertaining to the use of cutting fluids since most of them are toxic and contribute to a major portion of overhead costs. To address these issues, several methods like usage of solid lubricants, surface treatment, coating, minimum quantity lubrication and texturing of cutting tools have been adopted. Micro-texturing on cutting tool is a relatively recent technique which is being used to improve the tribological characteristics of the tool surface. Typical methods available for surface texturing are chemical etching, electro chemical machining, laser beam machining and electric discharge machining. Amongs these methods, there is a significant lack of literature exploring the feasibility of electric discharge machining (EDM) as a texturing process, especially on commonly used tool materials such as high-speed steel. This paper investigates the fabrication of micro-textures on high-speed steel to use micro-EDM. The EDM process parameters were optimized to create uniform textures. Upon comparing the performance of the textured cutting tools with conventional tools, it was found that the current texture geometry was highly effective in reducing the cutting forces at low speeds.

Progress in structured and textured cutting tools. Part 2. Influence of structured and textured cutting tools on the process performance

“…4b porównano wartości temperatury w skrawaniu stopu niklu Inconel 718 ostrzami konwencjonalnymi i teksturowanymi wykonanymi z kompozytu Al 2 0 3 -TiC. Naniesienie samosmarnej mikrotekstury na ostrze powoduje spadek temperatury o 3÷6% dla ostrzy typu MST-1 i 10÷12% dla ostrzy typu MST-2 [11,12].…”

“…Skutkiem omówionych oddziaływań strukturyzacji powierzchni ostrza jest ich istotny wpływ na mechanizmy i intensywność zużycia ostrza [2,5]. Jednym z ważnych aspektów jest znaczne ograniczenie tworzenia się przywarć adhezyjnych, co ma duże znaczenie praktyczne w skrawaniu stopów aluminium i superstopów na osnowie z tytanu i niklu [2,6,11,15,18].…”

Hole geometry and surface integrity assessment in drilling of inconel 718 using laser texture filled solid lubricant tools

“…There are several methods invented to generate texture on tool materials to improve the machining of high temperature materials. Electric discharge machining is the one method to generate surface texture at the micro scale on the cutting tool (Singh et al, 2019). Micro ball end milling process is also used for creating texture on the surfaces to augment the wettability of titanium alloy (Pratap and Patra, 2018).…”

Experimental Investigation and Multi-Objective Optimization of Cryogenically Cooled Near-Dry Wire-Cut EDM Using TOPSIS Technique

“…These downsides have been minimized by near-dry EDM and WEDM processes [10,16,19]. In the near-dry EDM/WEDM processes, the compressed air/gases mixed with the minimum amount of liquid/water are used as dielectric fluid [10,13,14,[18][19][20][21][22]. Many researchers have been attempted to enhance the near-dry EDM/WEDM processes.…”