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ITS » Master Theses » Sistem Manufaktur - S2
Posted by jono at 07/01/2010 11:30:23  •  3752 Views


STUDI EKSPERIMEN KETINGGIAN BOSS DAN BUSH PADA PENGGURDIAN GESEK DENGAN BENDA KERJA PELAT TEMBAGA

EXPERIMENT STUDY OF BOSS AND BUSH HEIGHT ON THE FRICTION DRILLING OF COPPER SHEET

Author :
Mashudi, Imam  




ABSTRAK

Penggurdian gesek friction drilling adalah metode pembuatan lubang pada pelat melalui proses pembentukan. Pahat gurdi gesek berbentuk konis tanpa sisi potong berputar menekan dan menembus benda kerja berbentuk pelat. Pemanasan akibat gesekan pada permukaan singgung antara pahat dengan benda kerja memungkinkan pelumeran deformasi dan pergerakan dari material benda kerja dan menghasilkan boss dan bush tanpa menghasilkan geram atau material sisa lainnya. Boss dan bush terbentuk dari bahan induk yang terdesak saat proses pembentukan dan ketinggiannya sangat bermanfaat untuk memberikan peningkatan luasan pengikatan sehingga tidak diperlukan komponen tambahan lainnya. Mekanisme terbentuknya ketinggian boss dan bush belum diketahui dengan pasti maka diperlukan studi eksperimen untuk mendapatkan model empirisnya. Selanjutnya dari model-model empiris yang dikembangkan dapat dilakukan proses optimasi agar diperoleh setting variabel proses yang dapat menghasilkan ketinggian boss dan bush yang maksimum. Suatu penelitian yang didasarkan pada rancangan Central Composite Design dan metode multiple response surface dilakukan untuk mengembangkan model empiris dari ketinggian boss dan bush. Selanjutnya dengan pendekatan desirability function dilakukan proses optimasi untuk memperoleh ketinggian boss dan bush yang maskimum. Dari penelitian yang telah dilakukan dapat diketahui bahwa model empiris dari ketinggian boss dan bush adalah berbentuk polinomial orde kedua. Secara serentak diperoleh ketinggian maksimum boss sebesar 2.225 mm dan ketinggian maksimum bush sebesar 3.927 mm. Kedua ketinggian tersebut dapat diperoleh dengan setting putaran spindel sebesar 2180 rpm kecepatan pemakanan sebesar 87 mmmnt dan sudut konis pahat gurdi gesek sebesar 23o.


ABSTRACT

Friction drilling is a method of hole-making process by forming. The process involves forcing a rotating pointed tool without cutting edge through a sheet metal work piece. The friction heating at the interface between the tool and the work piece enables softening deformation and displacement of work material and creates a boss and a bush without generating chips or waste materials. Additional components can be eliminated or reduced since the formed boss and bush are from parent materials and their height are useful in increasing the joint contact area. The boss and the bush formation mechanism is not well understood so that an experimentally study will be required in searching for adequate empirical models. The developed models can then be used to perform optimization in searching for process variables setting that generates the maximum boss and bush height. The research based on central the composite design and the multiple response surface method is carried out to develop the empirical models of boss and bush height. Desirability function approach is used to perform an optimization to attain the maximum height of boss and bush. From the research it can be identified that the empirical models of boss and bush are in the forms of second order polynomial equation. The dual response optimization on the height of the boss and the buss shows that the maximum boss height is 2.225 mm and the bush height is 3.927 mm. This two maximum value are found from the process setting of spindle rotation of 2180 rpm feed rate of 87 mmmin and conical angle of the tool bit of 23o.



Keywordsfriction drilling, boss, bush, model empiris, respon permukaan
 
Subject:  Adaptive Control Systems
Contributor
  1. Ir.Bobby Oedy P Soepangkat,MSc.,PhD. Dr.Ir.Wajan Berata,DEA.
Date Create: 06/01/2010
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Master-3100006028109
Collection ID: 3100006028109
Call Number: RTE 629.836 Mad p


Source
Manufucture System,RTE 629.836 Mad p

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