• Author / Uploaded
• Pranav Pandey

Citation preview

WHAT IS FLEXIBLE MANUFACTURING SYSTEM? 

FMS consists of a group of processing work stations interconnected by means of an automated material handling and storage system and controlled by integrated computer control system.



FMS is called flexible because it is capable of processing different work parts simultaneously at the workstation and quantities of production can be adjusted with respect to demand patterns.

FLEXIBILITY MEANING A manufacturing system must possess these three capabilities in order to be flexible:



The ability to identify and distinguish among different incoming part processed by the system.



Quick changeover of operating instructions.



Quick changeover of physical setup.

BASIC COMPONENTS OF FMS a) Workstations: Workstations are computer numerical control (CNC) machine tools that perform machining operation on work parts. The various workstations are:  Machining centers  Load and unload stations  Assembly work stations  Inspection stations , etc. b) Automated Material Handling and Storage system: These are used to transport work parts and subassembly parts between the processing stations. Functions:  Handling a variety of work part configurations.  Temporary storage.  Convenient for loading and unloading of work parts.

c) Computer Control System: It is used to coordinate the activities of the processing stations and the material handling system in the FMS. Functions:  Control of each work station.  Distribution of control instruction to work stations.  Production control.  Traffic control.

TYPES OF FMS Flexible manufacturing systems can be distinguished according to the number of machines in the system, they are a) Single machine cell

b) Flexible manufacturing cell c) Flexible manufacturing system a) Single Machine Cell: It consists of one CNC machining centre combined with a parts storage system for unattended operation. The cell can be divided to operate in a batch mode, a flexible mode, or a combination of both. b) Flexible manufacturing cell(FMC): It consists of two or three processing work stations combined with a part handling system. The part handling system is connected to a load/unload station. The handling system usually includes a limited parts storage capacity. c) Flexible manufacturing system (FMS): It has four or more processing stations connected mechanically by a common parts handling system and electronically by a distributed computer system.

TYPES OF FMS LAYOUT

The different types of FMS layouts are: a) In-line type b) Loop type c) Ladder type

d) Open-field type e) Robot- centered type

Work flow-one direction

Work in

Work out

PROC

PROC

PROC

PROC

PROC

AUT

AUT

AUT

AUT

AUT

Basic in-line configuration with one directional work flow

Work flow-both directions

LOAD UNLD MAN PROC

PROC

PROC

PROC

PROC

AUT

AUT

AUT

AUT

AUT

In-line with transfer at workstations to allow back flow on primary handling system

Inline Configuration

PROC

PROC

PROC

AUT

AUT

AUT

Work flow

LOAD

PROC

PROC

PROC

AUT

AUT

AUT

LOOP CONFIGURATION

Work flow

PROC LOAD UNLD MAN

AUT

PROC

PROC

PROC

AUT

AUT

AUT

LADDER CONFIGURATION

OPEN-FIELD CONFIGURATION

ROBOT-CENTERED CONFIGURATION

CHALLENGES WITH FMS 

Determining if FMS is the best production system for your company (economically and socially)



High costs associated with implementing FMS



Day to day maintenance of FMS operations

AIMS OF FMS The principle Aims of FMS are:  To reduce costs.  To Decrease Lead Times.  To Increase machine utilization.  To Decrease Work in Progress.  Better utilization of the production equipment.  Reduction of piece part unit costs.  To increase Technical Performance.  Shorter lead times/delivery times.  Determination of production capacities.  To increase quality.

ADVANTAGES OF USING FMS To reduce set up and queue times  Improve efficiency  Reduce time for product completion  Utilize human workers better  Produce a variety of Items under one roof  Improve product quality  Produce more product more quickly 

DISADVANTAGE OF USING FMS Limited ability to adapt to changes in product or product mix  Expensive, costing millions of dollars  Sophisticated manufacturing systems 

CONCLUSION 

We can concluded that it is system, which reduces the manual work with the help of automation.



It is also help us to understand the concept of automation as it is the requirement of today globalize world.



By using the flexible manufacturing system we can save 65 to 75% time over general manufacturing system.



Flexible Manufacturing System improve the quality of product by maximum utilization of equipments and resources at minimum cost.