Burr size investigation in micro milling of stainless steel 316L

Hajiahmadi, Saeed

doi:10.1016/j.ijlmm.2019.07.004

Cited by 25 publications

(20 citation statements)

References 10 publications

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“…Many researchers have examined the effect of milling strategies on burr formation: the up-milling (also known as conventional milling) was to be found ideal from the point of view burr-minimisation on OFHC [110], Inconel 718 [85], Ti6Al4V [94], AA1100 [98], AISI 1045 [4], Al6061-T6 [109], X5CrNi18-10 [111] materials. Hajiahmadi [49] observed smaller top-burr height in the case of up-milling of AISI 316L, than it was observed at the down-milled (also known as climb milling) top edges. Nevertheless, the topburr thickness was smaller at the down-milled edges.…”

Section: Burr Formation In Micro Sizesmentioning

confidence: 86%

“…Furthermore, the value of the theoretical chip thickness is often similar to the size of the minimum chip thickness [20,45,46], which may prevent chip formation in each edge step-in [47,48]. (iii) The ratio of the burr size to the size of the machined features is higher than it is used to in the case of the conventional machining operations, the cost and time needs of the micro-deburring processes have therefore more effect on the final cost of the products [49,50]. Furthermore, it is extremely difficult to remove burr in microsized features [32,51].…”

Section: Micro-milling Processmentioning

confidence: 99%

See 1 more Smart Citation

A review on micro-milling: recent advances and future trends

Balázs

Geier

Takács

et al. 2020

Int J Adv Manuf Technol

133

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Recently, mechanical micro-milling is one of the most promising micro-manufacturing processes for productive and accurate complex-feature generation in various materials including metals, ceramics, polymers and composites. The micro-milling technology is widely adapted already in many high-tech industrial sectors; however, its reliability and predictability require further developments. In this paper, micro-milling related recent results and developments are reviewed and discussed including micro-chip removal and micro-burr formation mechanisms, cutting forces, cutting temperature, vibrations, surface roughness, cutting fluids, workpiece materials, process monitoring, micro-tools and coatings, and process-modelling. Finally, possible future trends and research directions are highlighted in the micro-milling and micro-machining areas.

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Section: Burr Formation In Micro Sizesmentioning

confidence: 86%

Section: Micro-milling Processmentioning

confidence: 99%

A review on micro-milling: recent advances and future trends

Balázs

Geier

Takács

et al. 2020

Int J Adv Manuf Technol

133

View full text Add to dashboard Cite

show abstract

“…From the results of Figure 7c-e, it can be concluded that the accuracy can still be maintained when the range of rib width is among 100 μm and 20 μm. However, when the rib width is 10 μm, the shape of the rib has been deformed, which is brought on by the minimum cutting thickness [22], and the defect on the right side of the rib has affected the precision of the width, decreasing the quality of the rib, making it unable to satisfy the processing requirements. The result of the most suitable rib width in micro cutting experiments and simulations shows a close match.…”

Section: Tool Materials Cbnmentioning

confidence: 99%

“…On the other hand, according to definition of the burr formation, each operation that eases the plastic deformation may increase the probability of burr formation. Thus, as the spindle speed increases, the cutting temperature in the tool-work interface also increases, resulting in less flow stress during machining [22]. When the feed equals 6 µm/r or 8 µm/r, both the effect of material removal and the formation of burrs can be controlled, resulting in a high quality of rib, as exhibited in Figure 8c,d.…”

Section: Tool Materials Cbnmentioning

confidence: 99%

Surface Microtexture Fabrication and Temperature Gradient Regulation of Micro Wankel Engine

et al. 2019

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Nowadays, micro engine miniaturization is one of the most challenging issues, especially for the design and fabrication of the high-power-density micro Wankel engine. With the decrease of the size of the micro engine, the problem of the heat deformation of the cylinder becomes more serious. In this paper, a micro Wankel engine with microtextures on the outer surface of the cylinder is designed and manufactured to diffuse the heat dissipation and regulate the temperature gradient, so as to increase the power output density. First, a series of finite element simulations are conducted to design a type of ideal surface microtexture. Then, the machining condition is optimized to fabricate microtextures by micro cutting on the cylinder surface by studying the processing parameters. Finally, the performance of the new micro Wankel engine in terms of the temperature gradient regulation and the mechanical power output is tested and compared with that of the un-textured micro engine. The comparison results show that temperature of the textured micro engine was dropped from 185 °C to 125 °C and the mechanical power output increased by 10.74% from that of its un-textured counterpart, verifying the proposed methods for temperature gradient regulation.

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“…Several investigations were published about the thematic of the burr reduction [20][21][22]. The effect of the process parameters was quantitively or qualitatively computed by considering different work-piece materials, such as Inconel 718 [23], stainless steel AISI 316L [24] and Ti-6Al-4V [25]. The experimental researches revealed different behaviors for different materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Optimization of Process Parameters in CuNi18Zn20 Micromachining

et al. 2021

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Ultraprecision micromachining is a technology suitable to fabricate miniaturized and complicated 3-dimensional microstructures and micromechanisms. High geometrical precision and elevated surface finishing are both key requirements in several manufacturing sectors. Electronics, biomedicals, optics and watchmaking industries are some of the fields where micromachining finds applications. In the last years, the integration between product functions, the miniaturization of the features and the increasing of geometrical complexity are trends which are shared by all the cited industrial sectors. These tendencies implicate higher requirements and stricter geometrical and dimensional tolerances in machining. From this perspective, the optimization of the micromachining process parameters assumes a crucial role in order to increase the efficiency and effectiveness of the process. An interesting example is offered by the high-end horology field. The optimization of micro machining is indispensable to achieve excellent surface finishing combined with high precision. The cost-saving objective can be pursued by limiting manual post-finishing and by complying the very strict quality standards directly in micromachining. A micro-machining optimization technique is presented in this a paper. The procedure was applied to manufacturing of main-plates and bridges of a wristwatch movement. Cutting speed, feed rate and depth of cut were varied in an experimental factorial plan in order to investigate their correlation with some fundamental properties of the machined features. The dimensions, the geometry and the surface finishing of holes, pins and pockets were evaluated as results of the micromachining optimization. The identified correlations allow to manufacture a wristwatch movement in conformity with the required technical characteristics and by considering the cost and time constraints.

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Burr size investigation in micro milling of stainless steel 316L

Cited by 25 publications

References 10 publications

A review on micro-milling: recent advances and future trends

A review on micro-milling: recent advances and future trends

Surface Microtexture Fabrication and Temperature Gradient Regulation of Micro Wankel Engine

Experimental Optimization of Process Parameters in CuNi18Zn20 Micromachining

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