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You searched for subject:(laser cutter). Showing records 1 – 3 of 3 total matches.

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NSYSU

1. Hsu, Ching-Hu. Study of laser cutting of Sapphire.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2016, NSYSU

In this thesis, we study laser machining of sapphire and related issues. In order to achieve the industryâs general standard so this study focuses on sapphire processing optimum process parameters. There are two main processing needed, laser scribing for splitting and laser dicing. Laser scribing for splitting needs a cut depth of 1/3 the thickness of sapphire, and the finished surface canât have chipping (< 30 μm), random crack or closet breaking. In addition, the processing time must be fast and stable. Therefore, this thesis proposes three different experimental dicing and processing parameters. First, experiment applies simple optical system (direct beam) with âoptical trepanâ and XY-stage with laser source of ultraviolet. The parameters of laser frequency at 25 kHz, laser power of 3 watt and once round rip cutting with speed 5 mm/s can achieve depth of 1/3 the thickness. Using optical improvements, installation âoptical trepanâ in optical path to make small circle around area circle can improve the speed of XY-stage. Then laser dicing can be achieved (the gap between the surface and back side is about 40 μm). Second experiment is using ultraviolet laser source. But in the optical system, we install âLaser Scannerâ (Galvo Head) with high cutting speed characteristic and high freedom of laser machining. Laser frequency of 25 kHz, laser power of 3 watt and 15 times round rip cutting with speed 100 mm/s can achieve depth of 1/3 the thickness. In high speed and high freedom of laser machining processing, âRepetition rate of machiningâ is more important. And the best repetition rate in scanner is 80%. Finally, to completely cut sapphire, we use a high power infrared fiber laser (150 watt) as a processing source. Installation laser cutter and coaxial blowing with different type cooling gas can improve the IR laser caused thermal effects. The best cooling gas is nitrogen (9 kgf/cm2), which can isolate sapphire and oxygen interacting. Thus the thermal affected region can be less than 20 μm. Advisors/Committee Members: C. L. Chiu (chair), Cheng-Tang Pan (committee member), Wang, Yu-Jen (chair).

Subjects/Keywords: laser cutter; trepan; laser scanner; fiber laser; laser maching; laser scribing; laser dicing; sapphire; infrared laser; ultraviolet laser

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APA (6th Edition):

Hsu, C. (2016). Study of laser cutting of Sapphire. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0028116-211556

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Hsu, Ching-Hu. “Study of laser cutting of Sapphire.” 2016. Thesis, NSYSU. Accessed December 14, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0028116-211556.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Hsu, Ching-Hu. “Study of laser cutting of Sapphire.” 2016. Web. 14 Dec 2019.

Vancouver:

Hsu C. Study of laser cutting of Sapphire. [Internet] [Thesis]. NSYSU; 2016. [cited 2019 Dec 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0028116-211556.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hsu C. Study of laser cutting of Sapphire. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0028116-211556

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Ullsåker, Tove. Crumbling / Distressed.

Degree: Engineering and Business, 2015, University of Borås

The area of this work is distressed denim in women’s wear. Denim wear has been distressed by machines to imitate the individual patina that becomes from wearing e.g. a pair of unwashed jeans until the color strips from creases. This work uses challenges the faked used look, using a decorative motive in distressed denim. Lace has been used as a decoration of dress since medieval times. By using lace as the pattern for the distressing of denim one will decorate the denim in a destructive way that questions the perfection and delicate way that lace is usually used. Lace consists of threads and holes that builds an ornamental pattern, worn down denim often results in holes and threads at the most vulnerable areas of the garment. Denim is a warp faced cotton twill weave with blue indigo yarn in warp and natural white yarn in weft. By using a laser cutter to engrave a pattern on the warp faced side of the denim, one can set the settings on the laser cutter so that only the blue warp threads will be met by the laser beam. After wash the engraved warp threads will dissolve and depending on the scale and the design of the pattern the unengraved parts can dissolve as well. Therefor one needs to fix the unengraved parts of the pattern before wash if one wants the pattern to remain. There is several ways to fix the pattern before wash; this work includes fixing with laser cut fusing and with seams. Some of the garments aren’t engraved in this work but cut in the laser cutter. The two cutting techniques used is first a regular cut out technique and second a slicing technique. The shapes of the garments derives from typical denim and lace garments such as jeans, denim jackets, denim shirts, lace gown, wedding dresses and underwear such as negligees, corsets, bras and panties. Initially, experiments were done to understand the visual and technical effect of clashing materials and garments. The result is a collection, combining ideas from two different origins in fashion, denim from mineworkers and lace from nobles. The outfits manages how one can control distressed denim and shows a variation from lace, to garments where the traces of lace have completely or partially dissolved. The primary motive is to investigate surface possibilities in distressed denim through a specific pattern. The result is difficult to control and experiments in full scale are necessary to evaluate distressed experiments. The secondary motive is global. Can lasercutting and engravings be an alternative to sandblasting ? It is not dealt with in this investigation. However this investigation shows a selection of alternative expressions for distressed denim. This work challenges the idea of distressed denim as the only way to make a fake, torned effect. It points at new possibilities, using decorative motifs by lasercuts and engravings in combination with other treatments in search for alternative expressions in denimwear.

Subjects/Keywords: Clash; denim; lace; laser cutter; engrave; fashion design; decoration

…indigo yarn in warp and natural white yarn in weft. By using a laser cutter to engrave a… …pattern on the warp faced side of the denim, one can set the settings on the laser cutter so… …aren’t engraved in this work but cut in the laser cutter. The two cutting techniques used is… …expressions in denimwear. 1.2. KEYWORDS CLASH, DENIM, LACE, LASER CUTTER, ENGRAVE, FASHION DESIGN… …DISTRESSED DENIM AS DECORATION THROUGH ENGRAVINGS AND CUTS IN A LASER CUTTER. 9 3. METHOD This… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ullsåker, T. (2015). Crumbling / Distressed. (Thesis). University of Borås. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-637

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ullsåker, Tove. “Crumbling / Distressed.” 2015. Thesis, University of Borås. Accessed December 14, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-637.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ullsåker, Tove. “Crumbling / Distressed.” 2015. Web. 14 Dec 2019.

Vancouver:

Ullsåker T. Crumbling / Distressed. [Internet] [Thesis]. University of Borås; 2015. [cited 2019 Dec 14]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-637.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ullsåker T. Crumbling / Distressed. [Thesis]. University of Borås; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-637

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. LIM CHONG GUAN. Control of a rapid prototyping machine.

Degree: 2006, National University of Singapore

Subjects/Keywords: Laminated Object Manufacturing; Rapid Prototyping; XY-table; Laser Cutter; Dimensional Tolerance; Path Definition

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

GUAN, L. C. (2006). Control of a rapid prototyping machine. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/15186

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

GUAN, LIM CHONG. “Control of a rapid prototyping machine.” 2006. Thesis, National University of Singapore. Accessed December 14, 2019. http://scholarbank.nus.edu.sg/handle/10635/15186.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

GUAN, LIM CHONG. “Control of a rapid prototyping machine.” 2006. Web. 14 Dec 2019.

Vancouver:

GUAN LC. Control of a rapid prototyping machine. [Internet] [Thesis]. National University of Singapore; 2006. [cited 2019 Dec 14]. Available from: http://scholarbank.nus.edu.sg/handle/10635/15186.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

GUAN LC. Control of a rapid prototyping machine. [Thesis]. National University of Singapore; 2006. Available from: http://scholarbank.nus.edu.sg/handle/10635/15186

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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