Flexible Manufacturing System - Fms

Since the dawn of civilisation, man has been continuously trying to ease and improve his work by developing better tools. This process started with the development of stone tools and will culminate into development of a totally automated factory. This factory would be able to do all the things associated with a product, right from designing it to packaging. Since the human operator tends to be the weakest link in the production process, the need for automation has been felt throughout the industry.

A Flexible Manufacturing System (F.M.S.) is a part of this process and a step towards complete automation of the factory. This system automates the metal cutting part of the product manufacturing. A F.M.S. is a form of flexible automation in which several machine tools are linked together by a material-handling system, and all aspects of the system are controlled by a central computer1.

Why use F.M.S.?

The current market scenario is such that a customer has the requirement to demand a wide variety of good quality product at a very short notice. The traditional systems of product manufacture like Transfer Line system were unable to cope up with the market requirements. The Transfer Line system of manufacture had a very high production level but offered limited flexibility. On the other hand, Workshop system of product manufacture offered a very high degree of flexibility but had a very low production level. These systems were unable to satisfy the requirements of variety, quantity and speed at the same time. This lead to the work of development of a system, which combines the seemingly conflicting objectives of high flexibility and high productivity.

The emergence of F.M.S. technology has proved to be an ideal solution to this problem. With the help of F.M.S. we are able to produce a wide variety of products without making any changes in the hardware set-up. As a result of this the changeover time between two products can be reduced to the time required by the machine tools to receive the necessary instructions. It also reduces the lead-time drastically. This is of prime importance as lead-time is equated with the cost of the product. It is a market-sensitive technology as it can produce the required proportion of product variety quickly and efficiently.

Figure 1: - Volume versus variety capabilities of various Manufacturing Systems,

Courtesy Material and Processes in Manufacture, Lindberg

What is F.M.S.?

It is a collection of production equipment logically organised under a host computer and physically connected by a central transport system.

It is group of manufacturing cells linked by an automatic material handling system and a central computer. It is able to manufacture a mix of piece-part types