PERANCANGAN DAN PEMBUATAN ALAT GRINDING DAN POLISHING UNTUK PENGERJAAN BATU MULIA

ARSYAD, HANIF (2014) PERANCANGAN DAN PEMBUATAN ALAT GRINDING DAN POLISHING UNTUK PENGERJAAN BATU MULIA. Other thesis, UNIVERSITAS ANDALAS.

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Abstract

Design and Making of Grinding and Polishing Appliance for Precious Stone Working Hanif Arsyad No. BP 0810912035 Mechanical Engineering Department Engineering Faculty Andalas University ABSTRACT Lapidary has become an activity to process and transform gemstone / semi - precious into high-value objects are done from time immemorial . However , this activity has not been good growth begin at terms of processing until its quality determining. Lapidary include cutting, grinding and polishing is done using different tools , thus requiring expensive equipment procurement costs. From the stages of processing , the type of piece that is often found in Indonesia is a dome shape or cabochon . The design of the tools that may be used for use in small scale / household is a multifunctional tool. Tool that can be used as of cutting up to polishing. Then tested whether the tool can be used for precious stones workmanship and quality such as what can produce from the use of designed tool. By using photograph techniques and paint.NET software obtained the quality grades of workmanship. The quality grades obtained by the main factors to determine the quality that is the color. This grade is within the range for the best quality of precious stones . So that the tool can be used to workmanship of precious stones and also discovered a method of determining the quality of precious stone. In the testing phase, the tools used for working lumuik and limau manih stone, green and orange color is produced within the range of value 80-50, which is the best value for the workmanship of precious stone. Thus, the designed tool has been able to achieve a surface roughness that is suitable for precious stone, the best color can be produced and the productivity can be improved from the use of time by using a variety of tools . In terms use of processing time, the tool can be used to work on a relatively short when compared to conventional workmanship. Keywords : Lapidary, Color, Value, Surface Roughness, Productivity

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