Dimensional accuracy optimisation of multi-stage planetary EDM

Sánchez, J.A.; Lacalle, Luis Norberto López de; Lamíkiz, Aitzol; Bravo, U.

doi:10.1016/s0890-6955(02)00111-6

Cited by 26 publications

(16 citation statements)

References 2 publications

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“…On the other hand, fir-trees have been traditionally manufactured by Electro Discharge Machining (EDM). This non-conventional manufacturing technology stands out for facilitating complex geometrical cavities of high hardness materials with dimensional accuracy and excellent finishing surface [9][10][11]. Notwithstanding, the main inconvenience of this technology is based on low material removal rates, what means elevated manufacturing time.…”

Section: Introductionmentioning

confidence: 99%

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

González

Calleja

Pereira

et al. 2018

Metals

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Manufacturing techniques that are applied to turbomachinery components represent a challenge in the aeronautic sector. These components require high resistant super-alloys in order to satisfy the extreme working conditions they have to support during their useful life. Besides, in the particular case of Integrally Bladed Rotors (IBR), usually present complex geometries that need to be roughed and finished by milling and grinding processes, respectively. In order to improve their manufacturing processes, Super Abrasive Machining (SAM) is presented as a solution because it combines the advantages of the use of grinding tools with milling feed rates. However, this innovative technique usually needed high tool rotary speed and pure cutting oils cooling. These issues implied that SAM technique was not feasible in conventional machining centers. In this work, these matters were tackled and the possibility of using SAM in these five-axis centers with emulsion coolants was achieved. To verify this approach, Inconel 718 single blades with non-ruled surfaces were manufactured with Flank-SAM technique and conventional milling process, analyzing cutting forces, surface roughness, and dimension accuracy in both cases. The results show that SAM implies a suitable, controllable, and predictable process to improve the manufacture of aeronautical critical components, such as IBR.

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Section: Introductionmentioning

confidence: 99%

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

González

Calleja

Pereira

et al. 2018

Metals

View full text Add to dashboard Cite

show abstract

“…(1) were analysed by Sanchez et al [5]. In this work, a comparison of strategies taking into account machining time and roughness of lateral walls was carried out.…”

Section: Strategies For Multi-stage Planetary Edmmentioning

confidence: 99%

“…In this case, evaluation of the gap can be carried out indirectly, from the measurements of electrode and cavity dimensions for each regime, together with the radius of the orbit, as shown in [5]. Indirect measurement can be useful for a certain application, but it is time consuming and it may introduce errors that are not directly associated to the process itself.…”

Section: Strategies For Multi-stage Planetary Edmmentioning

confidence: 99%

“…4 shows the values of the increments DR orb ðiÞ used in both cases as a function of the EDM regime (expressed by surface finish). These values have been obtained using the methodology described in [5], but in this case extending the study also to roughing regimes (up to R a 12.5 mm, i.e. VDI 42).…”

Section: Characterization Of Gap Variationmentioning

confidence: 99%

“…5 shows the results of gap variation as a function of EDM regime and radius of the first orbit for a 10 mm diameter copper electrode. In previous works [5], the hypothesis that the gap does not depend on the radius of the orbit was assumed. However, it can be noticed that especially in the cases of roughing regimes, gap variation increases with the increase of the radius of the first orbit.…”

Section: Influence Of Process Variables On Gap Variationmentioning

confidence: 99%

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