Hot wire cutter

Unmanned air vehicles (UAV) have been used for many years and it mainly focus on military purposes. Numerous UAV development have been popular worldwide because the low in development cost, operating cost and ability to provide accurate surveillance information and it is a better option for performing reconnaissance missions in hostile environment. However, in the past years a new type of UAV has appeared that possessed lighter weight and smaller in size and it is categorized as a micro unmanned air vehicle (μ-UAV). Although the nonautonomous ready-to-fly tailless μ-UAV exists among local universities, the development of non-autonomous ready-to-fly tailless μ-UAV is still open to be explored. Thus, this project demonstrates the development of the non-autonomous ready-to-fly tailless μ-UAV named as Neo-Ptero. A special CNC hot wire cutter machine was used in the Neo-Ptero fuselage and wing development in which has evidently produced high accuracy of shapes and geometry based on the CAD design. A 3D printing process was used to produce few parts in the Neo-Ptero μUAV model. The model was equipped with on shelves RC components for future flight testing purpose. The actual Neo-Ptero weigh around 1.3kg and has a wingspan of 120.6cm.

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Freeform Volumetric Fabrication Using Actuated Robotic Hot Wire Cutter

Proceedings of the 2020 DigitalFUTURES ◽

10.1007/978-981-33-4400-6_26 ◽

2021 ◽

pp. 280-289

Author(s):

Paul Loh ◽

Yuhan Hou ◽

Chun Tung Tse ◽

Jiaqi Mo ◽

David Leggett

Keyword(s):

Robotic Arm ◽

The Novel ◽

Hot Wire ◽

Surface Geometry ◽

Stage Design ◽

End Effector ◽

Robotic Arms ◽

Wire Cutter ◽

Fabrication Procedure ◽

Set Up

AbstractThis paper discusses the design, fabrication and operational workflow of a novel hot-wire cutter used as an end effector for a robotic arm. Typically, hot wire cutters used a linear cutting element which results in ruled surfaces geometry. While several researchers have examined the use of hot wire cutter with cooperative robotic arms to create non-ruled surface geometry, this research explores the use of an actuated hot wire cutter manoeuver by a single robotic arm to produce similar form. The paper outlines the machine making process and its workflow resulting in a 1:1 scale prototype. The paper concludes by examining how the novel tool can be applied to an urban stage design. The research set up a fabrication procedure that has the potential to be deployed as an on-site fabrication methodology.

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Encyclopedic Dictionary of Polymers ◽

10.1007/978-1-4419-6247-8_6060 ◽

2011 ◽

pp. 372-372

Author(s):

Jan W. Gooch

Keyword(s):

Hot Wire ◽

Wire Cutter

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Characterization of Microcrystalline Transition from Amorphous Silicon as a Function of Hydrogen Dilution and Substrate Temperature of Hot-wire CVD

MRS Proceedings ◽

10.1557/proc-715-a17.2 ◽

2002 ◽

Vol 715 ◽

Author(s):

Keda Wang ◽

Haoyue Zhang ◽

Jian Zhang ◽

Jessica M. Owens ◽

Jennifer Weinberg-Wolf ◽

...

Keyword(s):

Substrate Temperature ◽

Sudden Change ◽

Chemical Vapor ◽

Threshold Value ◽

Ir Absorption ◽

Sudden Increase ◽

Hot Wire ◽

Hydrogen Dilution ◽

Integral Absorption ◽

Two Peaks

Abstracta-Si:H films were prepared by hot wire chemical vapor deposition. One group was deposited at a substrate temperature of Ts=250°C with varied hydrogen-dilution ratio, 0<R<10; the other group was deposited with fixed R=3 but a varied Ts from 150 to 550°C. IR, Raman and PL spectra were studied. The Raman results indicate that there is a threshold value for the microstructure transition from a- to μc-Si. The threshold is found to be R ≈ 2 at Ts = 250°C and Ts ≈ 200°C at R=3. The IR absorption of Si-H at 640 cm-1 was used to calculate the hydrogen content, CH. CH decreased monotonically when either R or Ts increased. The Si-H stretching mode contains two peaks at 2000 and 2090 cm-1. The ratio of the integral absorption peaks I2090/(I2090+I2090) showed a sudden increase at the threshold of microcrystallinity. At the same threshold, the PL features also indicate a sudden change from a- to μc-Si., i.e. the low energy PL band becomes dominant and the PL total intensity decreases. We attribute the above IR and PL changes to the contribution of microcrystallinity, especially the c-Si gain-boundaries.

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