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FLEXIBLE MANUFACTURING
SYSTEMS (FMS)
BY
SERCODRAJU
INTRODUCTION
• Flexible manufacturing is a concept that allows
manufacturing systems to be built under high
customized production requirements.
• FMS is actually an automated set of numerically
controlled machine tools and material handling
systems, capable of performing a wide range
manufacturing operations with quick tooling and
instruction changeovers.
INTRODUCTION
FLEXIBILITY
• Flexibility is an attribute that allows a mixed model
manufacturing system to cope up with a certain level of
variations in part or product style, without having any
interruption in production due to changeovers between
models
To be flexible, a manufacturing system must possess the
following capabilities:
• Identification of the different production units to perform
the correct operation
• Quick changeover of operating instructions to the
computer controlled production machines
• Quick changeover of physical setups of fixtures, tools and
other working units
FLEXIBILITY
• An automated system assisted with sensor system is
required to accomplish the needs and requirements of
contemporary business milieu.
• The term flexible manufacturing system, or FMS, refers to a
highly automated GT machine cell, consisting of a group of
computer numerical control (CNC) machine tools and
supporting workstations, interconnected by an automated
material handling and storage system, and all controlled by
a distributed computer system
• Capable of processing a variety of different part styles
simultaneously with the quick tooling and instruction
changeovers. Also, quantities of productions can be
adjusted easily to changing demand patterns.
TYPES OF FLEXIBILITY
1. Machine Flexibility. It is the capability to adapt a given machine in the system to a
wide range of production operations and part styles. The greater the range of
operations and part styles the greater will be the machine flexibility
2. Production Flexibility. It is the range of part styles that can be produced on the
systems.
3. Mix Flexibility. It is defined as the ability to change the product mix while
maintaining the same total production quantity that is, producing the same parts only
in different proportions. It is also known as process flexibility.
4. Product Flexibility. It refers to ability to change over to a new set of products
economically and quickly in response to the changing market requirements.
5. Routing Flexibility. It can define as capacity to produce parts on alternative
workstation in case of equipment breakdowns, tool failure, and other interruptions at
any particular station.
6. Volume Flexibility. It is the ability of the system to vary the production volumes of
different products to accommodate changes in demand while remaining profitable.
7. Expansion Flexibility. It is defined as the ease with which the system can be
expanded to foster total production volume.
FMS AND ITS RULE IN CIM
ENVIRONMENT
• A flexible manufacturing system (FMS) has
four or more processing workstations
connected mechanically by a common part
handling system and electronically by a
distributed computer system. It covers a wide
spectrum of manufacturing activities such as
machining, sheet metal working, welding,
fabricating, scheduling and assembly
Advantages of FMS
TYPES OF FMS
1. DEPENDING UPON KINDS OF OPERATION
I. Processing operation. Such operation transforms
a work material from one state to another moving
towards the final desired part or product. It adds
value by changing the geometry, properties or
appearance of the starting materials.
II. Assembly operation. It involves joining of two or
more component to create a new entity which is
called an assembly/subassembly
TYPES OF FMS
2. DEPENDING UPON NUMBER OF MACHINES
I. single machine cell (SMC). It consists of a fully automated machine
capable of unattended operations for a time period longer than one
machine cycle. It is capable of processing different part styles,
responding to changes in production schedule, and accepting new part
introductions. In this case processing is sequential not simultaneous.
II. Flexible manufacturing cell (FMC). It consists of two or three
processing workstation and a part handling system. The part handling
system is connected to a load/unload station. It is capable of
simultaneous production of different parts.
III. A Flexible Manufacturing System (FMS). It has four or more
processing work stations (typically CNC machining centres or turning
centres) connected mechanically by a common part handling system
and automatically by a distributed computer system.
TYPES OF FMS
3. DEPENDING UPON LEVEL OF FLEXIBILITY
I. Dedicated FMS. It is designed to produce a particular variety
of part styles. The product design is considered fixed. So, the
system can be designed with a certain amount of process
specialization to make the operation more efficient.
II. Random order FMS. It is able to handle the substantial
variations in part configurations. To accommodate these
variations, a random order FMS must be more flexible than
the dedicated FMS. A random order FMS is capable of
processing parts that have a higher degree of complexity.
Thus, to deal with these kinds of complexity, sophisticated
computer control system is used for this FMS type.
SUBSYSTEMS OF FMS
A flexible manufacturing system consists of two
subsystems:
• Physical subsystem
• Control subsystem
SUBSYSTEMS OF FMS
PHYSICAL SUBSYSTEM
1. Workstations. It consists of NC machines, machine-
tools, inspection equipment, loading and unloading
operation, and machining area.
2. Storage-retrieval systems. It acts as a buffer during
WIP (work-in-processes) and holds devices such as
carousels used to store parts temporarily between work
stations or operations.
3. Material handling systems. It consists of power
vehicles, conveyers, automated guided vehicles (AGVs),
and other systems to carry parts between workstations.
SUBSYSTEMS OF FMS
CONTROL SUBSYSTEM
1. Control hardware. It consists of mini and micro
computers, programmable logic controllers,
communication networks, switching devices and others
peripheral devices such as printers and mass storage
memory equipments to enhance the working capability
of the FMS systems.
2. Control software. It is a set of files and programs that
are used to control the physical subsystems. The
efficiency of FMS totally depends upon the compatibility
of control hardware and control software.
PHYSICAL COMPONENTS OF AN FMS
1. Numerical control machine tools. Machine tools are considered to
be the major building blocks of an FMS as they determine the degree
of flexibility and capabilities of the FMS.
2. Work holding and tooling considerations. It includes
pallets/fixtures, tool changers, tool identification systems, coolant, and
chip removal systems
3. Material-Handling Equipment .The material-handling equipment
used in flexible manufacturing systems include robots, conveyers,
automated guided vehicle systems, monorails and other rail guided
vehicles, and other specially designed vehicles.
4. Inspection equipment. It includes coordinate measuring machines
(CMMs) used for offline inspection and programmed to measure
dimensions, concentricity, perpendicularity, and flatness of surfaces.
5. Other components. It includes a central coolant and efficient chip
separation system
THANKYOU

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Flexible manufacturing systems (FMS)

  • 2. INTRODUCTION • Flexible manufacturing is a concept that allows manufacturing systems to be built under high customized production requirements. • FMS is actually an automated set of numerically controlled machine tools and material handling systems, capable of performing a wide range manufacturing operations with quick tooling and instruction changeovers.
  • 4. FLEXIBILITY • Flexibility is an attribute that allows a mixed model manufacturing system to cope up with a certain level of variations in part or product style, without having any interruption in production due to changeovers between models To be flexible, a manufacturing system must possess the following capabilities: • Identification of the different production units to perform the correct operation • Quick changeover of operating instructions to the computer controlled production machines • Quick changeover of physical setups of fixtures, tools and other working units
  • 5. FLEXIBILITY • An automated system assisted with sensor system is required to accomplish the needs and requirements of contemporary business milieu. • The term flexible manufacturing system, or FMS, refers to a highly automated GT machine cell, consisting of a group of computer numerical control (CNC) machine tools and supporting workstations, interconnected by an automated material handling and storage system, and all controlled by a distributed computer system • Capable of processing a variety of different part styles simultaneously with the quick tooling and instruction changeovers. Also, quantities of productions can be adjusted easily to changing demand patterns.
  • 6. TYPES OF FLEXIBILITY 1. Machine Flexibility. It is the capability to adapt a given machine in the system to a wide range of production operations and part styles. The greater the range of operations and part styles the greater will be the machine flexibility 2. Production Flexibility. It is the range of part styles that can be produced on the systems. 3. Mix Flexibility. It is defined as the ability to change the product mix while maintaining the same total production quantity that is, producing the same parts only in different proportions. It is also known as process flexibility. 4. Product Flexibility. It refers to ability to change over to a new set of products economically and quickly in response to the changing market requirements. 5. Routing Flexibility. It can define as capacity to produce parts on alternative workstation in case of equipment breakdowns, tool failure, and other interruptions at any particular station. 6. Volume Flexibility. It is the ability of the system to vary the production volumes of different products to accommodate changes in demand while remaining profitable. 7. Expansion Flexibility. It is defined as the ease with which the system can be expanded to foster total production volume.
  • 7. FMS AND ITS RULE IN CIM ENVIRONMENT • A flexible manufacturing system (FMS) has four or more processing workstations connected mechanically by a common part handling system and electronically by a distributed computer system. It covers a wide spectrum of manufacturing activities such as machining, sheet metal working, welding, fabricating, scheduling and assembly
  • 9. TYPES OF FMS 1. DEPENDING UPON KINDS OF OPERATION I. Processing operation. Such operation transforms a work material from one state to another moving towards the final desired part or product. It adds value by changing the geometry, properties or appearance of the starting materials. II. Assembly operation. It involves joining of two or more component to create a new entity which is called an assembly/subassembly
  • 10. TYPES OF FMS 2. DEPENDING UPON NUMBER OF MACHINES I. single machine cell (SMC). It consists of a fully automated machine capable of unattended operations for a time period longer than one machine cycle. It is capable of processing different part styles, responding to changes in production schedule, and accepting new part introductions. In this case processing is sequential not simultaneous. II. Flexible manufacturing cell (FMC). It consists of two or three processing workstation and a part handling system. The part handling system is connected to a load/unload station. It is capable of simultaneous production of different parts. III. A Flexible Manufacturing System (FMS). It has four or more processing work stations (typically CNC machining centres or turning centres) connected mechanically by a common part handling system and automatically by a distributed computer system.
  • 11. TYPES OF FMS 3. DEPENDING UPON LEVEL OF FLEXIBILITY I. Dedicated FMS. It is designed to produce a particular variety of part styles. The product design is considered fixed. So, the system can be designed with a certain amount of process specialization to make the operation more efficient. II. Random order FMS. It is able to handle the substantial variations in part configurations. To accommodate these variations, a random order FMS must be more flexible than the dedicated FMS. A random order FMS is capable of processing parts that have a higher degree of complexity. Thus, to deal with these kinds of complexity, sophisticated computer control system is used for this FMS type.
  • 12. SUBSYSTEMS OF FMS A flexible manufacturing system consists of two subsystems: • Physical subsystem • Control subsystem
  • 13. SUBSYSTEMS OF FMS PHYSICAL SUBSYSTEM 1. Workstations. It consists of NC machines, machine- tools, inspection equipment, loading and unloading operation, and machining area. 2. Storage-retrieval systems. It acts as a buffer during WIP (work-in-processes) and holds devices such as carousels used to store parts temporarily between work stations or operations. 3. Material handling systems. It consists of power vehicles, conveyers, automated guided vehicles (AGVs), and other systems to carry parts between workstations.
  • 14. SUBSYSTEMS OF FMS CONTROL SUBSYSTEM 1. Control hardware. It consists of mini and micro computers, programmable logic controllers, communication networks, switching devices and others peripheral devices such as printers and mass storage memory equipments to enhance the working capability of the FMS systems. 2. Control software. It is a set of files and programs that are used to control the physical subsystems. The efficiency of FMS totally depends upon the compatibility of control hardware and control software.
  • 15. PHYSICAL COMPONENTS OF AN FMS 1. Numerical control machine tools. Machine tools are considered to be the major building blocks of an FMS as they determine the degree of flexibility and capabilities of the FMS. 2. Work holding and tooling considerations. It includes pallets/fixtures, tool changers, tool identification systems, coolant, and chip removal systems 3. Material-Handling Equipment .The material-handling equipment used in flexible manufacturing systems include robots, conveyers, automated guided vehicle systems, monorails and other rail guided vehicles, and other specially designed vehicles. 4. Inspection equipment. It includes coordinate measuring machines (CMMs) used for offline inspection and programmed to measure dimensions, concentricity, perpendicularity, and flatness of surfaces. 5. Other components. It includes a central coolant and efficient chip separation system