14-05-2012, 02:51 PM
HENRY MAUDSLAY
project.DOC (Size: 352 KB / Downloads: 40)
INTRODUCTION:
In olden days, people used chipping process for material removal. HENRY MAUDSLAY developed the first engine lathe in the year 1794. Industrial revolutionsed the wider use of machine tools. Later, precision machining gained more value. Lathes, shapers, planners, grinders, saws and milling, drilling and boring machine reached a fairly high degree of precision by 19th century
At present, trend has moved towards absolute measurement. Machining with good surface finish and less tolerance range gains value. This leads to the concept of minimization of vibration and automization of feed satisfying all the above needs.
PROJECT OVERVIEW:
The project entitled “Automizing of Feed in a Machine Tool” is done to achieve high efficiency in machining. This work has done with a view towards minimizing the vibration and tool wear.
To minimize vibration, it has to be measured. So, we had designed Piezo-electric sensor, which gives vibration values in terms of voltage. Vibration values are fed to micro controller which checks the values to stepper motor drive circuit, which inurn drives, the stepper motor. Feed rod is driven by stepper motor according to vibration.
The system thus reduces vibration and also facilitates improved efficiency of machining. Machine and tool life is also considerably increased.
OBJECTIVE & PROBLEM IDENTIFICATION:
At present, every industry faces tough competition in manufacturing. Now quality has become the major concern. Each and every product being manufactured with quality, the one which has competitive (low) price wins the market. The surface finish plays a vital role in quality. The aim of this project is to arrive at an automation of feed in lathe with an objective to reduce vibrations. There by increasing the machine and tool life.
The main objectives are
• To reduce vibration
• To automize the feed in lathe
• To obtain jobs of good surface finish
• To increase machine & tool life.
SCOPE AND PURPOSE:
This deals with machining efficiency and the factors that affects it. Vibration makes the lathe inefficient at some point of time for precision machining. The problem lies with the hardness of the job, which is varying along its length. As the tool travels with the same feed rate along the job it is subjected to vibration at the point of maximum hardness in the job. We could observe some blurred surface in the job due to this effect. By automation, feed rate is varied according to hardness and reduced vibration yields work piece with desired surface finish. The main scope of this project is to analyze vibration and thereby atomize the feed using micro controller.