Curvature-based tool-path segmentation for feedrate optimization …
N2 - This paper presents a novel method of curvature-based tool-path segmentation for decreased machining time that overcomes feedrate limitations due to scale effects in micromilling. When accounting for tool size effects in the microscale feedrate optimization process, the limitation on maximum feedrate imposed by required precision is reduced.
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Spiral tool path optimization method for fast/slow tool servo …
This method comprises four steps: (1) a newly proposed surface analysis model for tool path generation, (2) interpolation error of archimedes spiral trajectory, (3) tool path optimization solution using Non dominated sorting genetic algorithm-II, (4) tool …
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(PDF) Evaluation of Tool Path Strategy and Cooling
The micromilling tests revealed that better results were obtained with the use of the contour tool path strategy in terms of cutting forces (by up to ~43% compared to the dry condition) and ...
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Micro milling of additively manufactured AISI 316L: impact
Due to the ratio of melt path width w to melt path height h (see Fig. 5) of 1.47 ± 0.27 (AM1) and 2.15 ± 0.63 (AM2), the increased tool wear when micromilling with feed direction parallel to the build-up direction can presumably be attributed to the increased crossing of melt borders.
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(PDF) Spiral Tool Path Generation Method on Mesh Surfaces …
PDF | This paper presents a new spiral smoothing method to generate smooth curved tool paths directly on mesh surfaces. Spiral tool paths are preferable... | …
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Prediction of mesoscale deformation in milling micro thin
The micro channel cold plate is very suitable for the application environment of high heat consumption liquid cooling such as PCB plate and multi-layer components. However, at mesoscale, the titanium alloy micro channel cold plate is micro thin-walled structure of cantilever boundary with weak stiffness, which leads to significant …
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Metals | Free Full-Text | Evaluation of Tool Path Strategy and …
Compared to milling on a macro scale, the micromilling process has several cumbersome points that need to be addressed. Rapid tool wear and fracture, severe burr formation, and poor surface quality are the major problems encountered in the micromilling process. This study aimed to reveal the effect of cutting path strategies on the cutting …
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Scale Machining
11.08.2 Size Effect in Micro-Milling. In macro-scale machining, the cutting edge of the tool is assumed to be perfectly sharp as shown in Figure 1 (a). In micromachining, the undeformed chip thickness is comparable to the cutting edge radius of the tool and grain size of the material. In this way, the cutting edge cannot be treated as perfectly ...
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Make a big deal out of micromilling
Chip formation in micromilling is critical, and it is also material-specific. Each material requires its own methodology to form a chip properly. This is where proper tool selection is crucial. The tool's …
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Evaluation of Tool Path Strategy and Cooling Condition …
of a pocket. The hatch zigzag tool path strategy and the contour climb tool path strategy under different cooling conditions (e.g., dry, air blow, and flood coolant) at fixed cutting …
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Design of a novel 2D ultrasonic transducer for 2D high-frequency
Ultrasonic vibration–assisted machining (VAM) is a process in which a tool or workpiece is vibrated using ultrasonic frequency small-amplitude vibrations to improve cutting performance, and an ultrasonic transducer usually generates these vibrations. This study investigates how two-dimensional vibrations are generated using axially polled …
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Obtaining a spiral path for machining STL surfaces using non
In this study, an isoscallop tool path planning method for triangular mesh surfaces, in which the tool path is derived directly from the contours of a normalized …
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Advanced spiral tool path for circular pocket machining
This paper presents an algorithm for generating a tool path for cutting a pocket with islands, which includes detecting when the tool …
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Effect of Conventional and Trochoidal Milling Paths on Burr
For the down micromilling path, delamination of the coating was observed due to the presence of built-up edge. For the up micromilling path, rounding of the cutting edges was observed, mainly due to abrasive wear. The increase in cutting speed from 15 to 35 m/min reduced tool wear in the case of zig-zag and down micromilling.
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Evaluation of milling performance of 50-μm D-shaped carbide tool
A shallow tool rotation trajectory occurred at the bottom of the microgroove. Several materials underwent elastic deformation under the extrusion at the bottom of the tool, accumulated on the back of the feed path, and concentrated on the cutting direction of the tool rotation, which became more significant with the increase in milling distance.
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Cross-directional feed rate optimization using tool-path surface
With the state-of-the-art technologies, NC tool paths are optimized along the feed direction of the tool path without the consideration of the consistency in the crossing (step-over) direction. As a result, the surface finishing is not fully optimal. In this paper, a method that performs the feed rate scheduling with consistency in crossing direction is …
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♨️Climb Milling vs Conventional Milling
Climb Milling = Down Milling. Conventional Milling = Up Milling. The difference between Conventional Milling and Climb Milling is all about the relationship between the tool and the workpiece. Climb milling …
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Micromachining of Advanced Materials | IntechOpen
Applying MQL with flow in the feeding direction solves these problems. When using MQL at high air pressure above 5.5 bar, a nozzle with rough internal surface breaks the lubricant into smaller droplets and effectively improves …
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Experimental research on the top burr formation in micro milling
3.1 Top burr formation mechanisms. In micro milling, the cutting thickness is downscaled to be comparable to tool cutting edge radius. As shown in Fig. 4, in the cutting process, the contact region between tool cutting edge and workpiece is divided into three sub-regions, the rake face (AB) in which the material flow along it to form chips, the tool …
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Obtaining a spiral path for machining STL surfaces using non
Recently, for machining of the free-from surface, tool path methods have been evolving from traditionally offsetting the initial tool path over the whole surface according to these geometry patterns of Zig-zag [3,4], contour-parallel [10] and spiral trajectory [11,12], etc., to the vector field based methods that make the cutter mill the ...
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Evaluation of Tool Path Strategy and Cooling Condition …
The micromilling tests revealed that better results were obtained with the use of the contour tool path strategy in terms of cutting forces (by up to ~43% compared to the dry condition) and ...
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Micromilling: A method for ultra-rapid prototyping of plastic
2.0 Fabrication Overview. A critical step in developing microfluidic systems is choosing the proper microfabrication method. In this section, we provide the microfluidics practitioner with a basis for considering micromilling as a useful fabrication method, particularly for ultra-rapid prototyping of microfluidic devices in plastics (and potentially …
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tool path direction for spiral micromilling
Spiral tool path generation for diamond ... surface along the normal direction of the base surface ... assessment in a micromilling machine equipped ... WhatsApp Effects of tool paths and machining parameters on .
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Spiral tool path generation for diamond turning optical freeform
Following this process, the spiral tool path is generated too, see Fig. 9. Compared with case 1, the normal at the bottom of designed surface has bigger slope. Obviously, we cannot use traditional Archimedean-spiral-based method to generate spiral tool path for this case. Download : Download full-size image (a) Generating curve.
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Spiral tool path generation for diamond turning optical freeform
By projecting the space Archimedean spiral onto the freeform surface along the normal direction of the base surface instead of a fixed direction like traditional method, a quasi-uniform spiral tool path on the freeform surface can be obtained. This method can be used on diamond turning optical freeform surfaces.
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Metals | Free Full-Text | Evaluation of Tool Path …
Compared to milling on a macro scale, the micromilling process has several cumbersome points that need to be addressed. Rapid tool wear and fracture, severe burr formation, and poor surface quality …
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Cross-directional feed rate optimization using tool-path …
cloud [7]. There are two directions on the tool-path surface: feed direction and crossing direction. The crossing direction also called the step-over direction is perpendicular to the feed direction. The feature points of the tool path refer to the normal dis-continuityofthetool-pathsurface.Namely,aG1 featurepoint corresponds to a location with ...
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Generating spiral tool paths based on spiral enter assistant line
In order to increase cutting width, decrease tool path length, and improve machining efficiency, the spiral enter assistant line (SEAL) is embedded into a convex …
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Spiral tool path generation method in a NURBS parameter space …
This method comprises five steps: (1) radial Cartesian coordinate discretization of freeform surfaces, (2) NURBS global interpolation, (3) tool contact point …
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path direction for spiral micromilling
Tool path generation of ultraprecision diamond turning: A state . However, a sharp change in the normal direction of the surface will cause the Xaxis to oscillate during the processing Zhiwei Zhu, Xiaoqin Zhou et al proposed a pseudorandom processing tool path generation method to change the spiral tool mark, 29 as shown in Fig 7 This method will also …
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