This document discusses flexible manufacturing systems (FMS) and automated guided vehicle systems (AGVS). It defines FMS as a highly automated group of CNC machine tools interconnected by an automated material handling system. It describes the types, components, and benefits of FMS, including flexibility types like machine flexibility. It also discusses automated guided vehicle systems for material transport, including guidance technologies and vehicle management.
Introduction ,FMS Equipment,FMS Layouts ,Analysis Methods for FMS,,advantages of fms,comparison of fms to conventional methods,applications.Benefits of fms.
ANALYSIS OF TRANSFER LINE WITH BUFFER STORAGEManoj Gowda K
An automated transfer line is consisted of several workstations which are linked together by a material handling system where parts are transferred from one station to the next.
Introduction ,FMS Equipment,FMS Layouts ,Analysis Methods for FMS,,advantages of fms,comparison of fms to conventional methods,applications.Benefits of fms.
ANALYSIS OF TRANSFER LINE WITH BUFFER STORAGEManoj Gowda K
An automated transfer line is consisted of several workstations which are linked together by a material handling system where parts are transferred from one station to the next.
Sections:
1. Fundamentals of Manual Assembly Lines
2. Analysis of Single Model Assembly Lines
3. Line Balancing Algorithms
4. Mixed Model Assembly Lines
5. Workstation Considerations
6. Other Considerations in Assembly Line Design
7. Alternative Assembly Systems
difference of NC and CNC ,Part programming,Methods of manual part programming,Basic CNC input data,Preparatory Functions ,Miscellaneous Functions,Interpolation:Canned cycles:part programming on component,Tool length compensation,Cutter Radius,Task compensation:Types of media of NC
COMPUTER AIDED PROCESS PLANNING (CAPP)KRUNAL RAVAL
Computer-aided process planning (CAPP) helps determine the processing steps required to make a part after CAP has been used to define what is to be made. CAPP programs develop a process plan or route sheet by following either a variant or a generative approach.
Sections:
1. Fundamentals of Manual Assembly Lines
2. Analysis of Single Model Assembly Lines
3. Line Balancing Algorithms
4. Mixed Model Assembly Lines
5. Workstation Considerations
6. Other Considerations in Assembly Line Design
7. Alternative Assembly Systems
difference of NC and CNC ,Part programming,Methods of manual part programming,Basic CNC input data,Preparatory Functions ,Miscellaneous Functions,Interpolation:Canned cycles:part programming on component,Tool length compensation,Cutter Radius,Task compensation:Types of media of NC
COMPUTER AIDED PROCESS PLANNING (CAPP)KRUNAL RAVAL
Computer-aided process planning (CAPP) helps determine the processing steps required to make a part after CAP has been used to define what is to be made. CAPP programs develop a process plan or route sheet by following either a variant or a generative approach.
The proper implementation and role of flexible manufacturing system in current scenario. Better understanding of different types of flexible manufacturing system layouts and types of flexible manufacturing system.
Other than these, brief introduction of flexibility and types of flexibility in manufacturing and other industries.
The reason the FMS is called flexible is that it is capable of
processing a variety of different part styles simultaneously
at the various workstations, and the mix of part styles and
quantities of production can be adjusted in response to
changing demand patterns.
• The FMS is most suited for
the mid-variety, mid-volume
production range
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Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
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1. FLEXIBLE MANUFACTURING SYSTEM
(FMS) AND AUTOMATED GUIDED
VEHICLE SYSTEM (AGVS)
Types of Flexibility - FMS – FMS Components – FMS Application
& Benefits – FMS Planning and Control– Quantitative analysis in
FMS – Simple Problems. Automated Guided Vehicle System
(AGVS) – AGVS Application – Vehicle Guidance technology –
Vehicle Management & Safety.
2. FMS
FMS may be defined as “a highly automated GT machine cell,
consisting of a group of processing workstations (usually CNC
machine tools), interconnected by an automated material
handling and storage system, and controlled by a distributed
computer system.”
FMS employs a fully integrated handling system with automated
processing stations.
3.
4.
5. Flexibility and its Types
Flexibility is an attribute that allows a manufacturing system to
cope up with a certain level of variations in part or product type,
without having any interruption in production due to
changeovers between models.
Flexibility measures the ability to adopt “to a wide range of
possible environment”
6. Tests of Flexibility
Part variety test
Schedule change test
Error recovery test
New part test
9. Machine flexibility
Definition: Machine flexibility is the capability to adapt a given
machine in the system to a wide range of production operations
and part types.
Influencing factors:
Setup or change over time
Ease with which part-programs can be downloaded to machines
Tool storage capacity of machine
Skill and versatility of workers in the systems
10. Production flexibility
Definition: Production flexibility is the range of part types that
can be produced by a manufacturing system.
Influencing factors:
Machine flexibility of individual stations
Range of machine flexibilities of all stations in the system
11. Mix (or Process) flexibility
Definition: Mix flexibility, also known as process flexibility, is
the ability to change the product mix while maintaining the
same production quantity. i.e., producing the same parts only in
different proportions
Influencing factors:
Similarity of parts in the mix
Machine flexibility
Relative work content times of parts produced
12. Product flexibility
Definition: Product flexibility is the ability to change over to a
new set of products economically and quickly in response to the
changing market requirements.
Influencing factors:
Relatedness of new part design with the existing part family
Off-line part program preparation
Machine flexibility
13. Routing flexibility
Definition: Routing flexibility is the capacity to produce parts on
alternative workstation in case of equipment breakdowns, tool
failure, and other interruptions at any particular station.
Influencing factors:
Similarity of parts in the mix
Similarity of workstations
Common testing
14. Volume (or capacity) flexibility
Definition: Volume flexibility, also known as capacity flexibility,
is the ability of the system to vary the production volumes of
different products to accommodate changes in demand while
remaining profitable.
Influencing factors:
Level of manual labour performing production
Amount invested in capital equipment
15. Expansion flexibility
Definition: Expansion flexibility is the ease with which the
system can be expanded to foster total production volume.
Influencing factors:
Cost incurred in adding new workstations and trained workers
Easiness in expansion of layout
Type of part handling system
16. Four Tests of Flexibility Vs Seven Types of Flexibility
Sl No Flexibility Test Type of Flexibility
1 Part Variety Machine
Production
2 Schedule Change Mix
Volume
Expansion
3 Error recovery Routing
4 New part Product
17. Types of FMS
Classification based on the kinds of operations they perform
Processing operation
Assembly operation
Classification based on the number of machines in the system
Single machine cell (SMC)
Flexible machine cell (FMC)
Flexible manufacturing system (FMS)
Classification based on the level of flexibility associated with the system
Dedicated FMS
Random order FMS
18. Classification based on the kinds of
operations they perform
Processing operation
Processing 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.
Assembly operation
Assembly operation involves joining of two or more components to create a
new entity which is called an assembly.
Permanent joining processes include welding, brazing, soldering, adhesive
banding, rivets, press fitting and expansion fits.
24. Classification based on the level of
flexibility associated with the system
Dedicated FMS
A dedicated FMS is designed to produce a limited variety of part
configurations.
Thus the dedicated FMS usually consists of special purpose machines
rather than general purpose machines.
Random order FMS
The random order FMS is equipped with general purpose machines so as
to meet the product variations. Also FMS type requires a more
sophisticated computer control system.
`
25.
26.
27. Components/Elements of FMS
Workstations
Material handling and storage system
Computer control system
Human resources
28. FMS Workstations
The workstations/processing stations used in FMS depends upon the
type of product manufactured by the system.
The types of workstations that are usually found in a FMS are:
Load/unload stations
Machining stations
Assembly workstations
Inspection station
Other processing stations
29. Material handling and storage system
FMS material handling and storage system include part
transportation, raw material and final product transportation
and storage of workpieces, empty pallets, auxiliary materials,
wastes, fixtures and tools.
Functions of the material handling system
Types of FMS layout
Types of handling equipment used in FMS
30. Functions of the material handling
system
Material handling may be defined as the functions and systems
associated with the transportation, storage, and physical control
to work-in-process material in manufacturing.
The general purpose of material handling in a factory is to move
raw materials, work-in-process, finished parts, tools, and
supplies from one location to another to facilitate the overall
operations of manufacturing.
33. In-line layout
As the name suggests, the materials and handling systems are
arranged in a straight line in the in-line layout.
34.
35. Loop layout
In the loop layout, the workstations are arranged in a loop, as
shown in figure.
36.
37. Ladder layout
The ladder layout, an adaptation of the loop layout, consists of a
loop with rungs on which workstations are located.
38.
39. Open-field layout
The open field layout, also an adaptation of the loop
configuration, consists of multiple loops, ladders and sliding
organized to achieve the desired processing requirements.
40.
41. Robot-centered cell
In the robot-centered cell, one or more robots are used as the
material handling system.
42.
43. Types of handling equipment used in
FMS
Primary Handling System
Secondary Handling System
44. Primary Handling System
The primary handling system establishes the basic layout of the
FMS and is responsible for moving work parts between work
stations in the system.
45.
46. Secondary Handling System
The secondary handling system consists of transfer devices,
automatic pallet changers, and similar mechanisms located at
the workstations in the FMS.
The functions of the secondary handling systems are:
To transfer work parts from the primary system to the machine
tool or other processing stations.
To position the work parts with sufficient accuracy and
repeatability at the workstation for processing.
To provide buffer storage of work parts at each workstation.
47. Types of Material Handling
Equipment
The material handling equipment commonly used to move parts
between stations can be grouped under six categories,
Conveyors
Cranes and hoists
Industrial trucks
Monorails and other rail guided vehicles
Automated guided vehicles (AGVs) and
Industrial robots.
48. Computer control system
In flexible manufacturing systems, computers are required to
control the automated and semi-automated equipment and to
participate in the over all coordination and management of the
manufacturing system.
A typical FMS computer control system consists of a central
computer and micro computers controlling the individual
machines and other components.
49. Functions of a FMS computer control
system
Workstation/processing station control
Distribution of control instructions to workstations
Production control
Material handling system control
Workpiece monitoring
Tool control
Quality control
Failure diagnosis
Safety monitoring
Performance monitoring and reporting
51. Types of FMS Data Files
Part program file
Routing file
Part production file
Pallet reference file
Station tool file
Tool life file
52.
53. Human Resources
In FMS, human labours are needed to perform the following functions
To load raw work parts into the system
To unload finished work parts from the system
For tool changing and tool setting
For equipment maintenance and repair
To program and operate the computer system
To accomplish overall management of the system
57. Economics of FMS
5-20% reduction in personnel
15-30% reduction in engineering design cost
30-60% reduction in overall lead time
30-60% reduction in work-in-process
40-70% gain in overall production
200-300% gain in capital equipment operating time
200-500% gain in product quality
300-500% gain in engineering productivity
58. Advantages of FMS
(Benefits of FMS)
Increased machine utilization
Reduced inventory
Reduced manufacturing lead time
Greater flexibility in production scheduling
Reduced direct labour cost
Increased labour productivity
Shorter response time
Consistent quality
Reduced factory floor space
Reduced number of tools and machines required
Improved product quality
59. Disadvantages of FMS
Very high capital investment is required to implement a FMS
Acquiring, training and maintaining the knowledgeable labour
pool requires heavy investment
Fixtures can sometimes cost much more with FMS, and software
development costs could be as much as 12-20% of the total
expense
Tool performance and condition monitoring can also be
expensive since tool variety could undermine efficiency
Complex design estimating methodology requires optimizing
the degree of flexibility and finding a trade off between
flexibility and specialization
60. FMS Planning and Control
(FMS Planning and Implementation
issues)
FMS planning and design issues
FMS control (or operational) issues
61. FMS Planning issues
Part family considerations
Processing requirements
Physical characteristics of the work parts
Production volume
62. FMS design issues
Type of work stations
Variations in process routings and FMS layout
Material handling system
Work-in-process and storage capacity
Tooling
Pallet fixtures
63. FMS operational issues
Scheduling and dispatching
Machine loading
Part routing
Part grouping
Tool management
Pallet and fixture allocation
64. Quantitative analysis of Flexible
Manufacturing System
Flexible manufacturing system can be analysed using different
models. The four different categories of FMS analysis models
are:
Deterministic models
Queuing models
Discrete event simulation
Other techniques
65. Bottleneck model
The bottleneck model is a simple and intuitive approach to
determine the starting estimates of FMS design parameters such
as production rate, capacity and utilization.
74. Automated Guided Vehicle System
(AGVS)
An Automated Guided Vehicle System (AGVS) is a computer
controlled, driverless vehicle used for transporting materials
from point to point in a manufacturing setting.
An AGVS uses independently operated, self-propelled vehicles
that are guided along pre-defined paths, and are powered by
means of on-board batteries.
The AGVs are highly flexible, intelligent, and versatile material
handling systems used to transport materials from various
loading locations to various unloading locations throughout the
manufacturing facility.
75. Strengths of AGVs
Space
Economical
Agile
Flexible
Dynamic
Redundancy
76. Benefits of AGVs
Labour
Damage
Shipping accuracy
Energy
Safety
77.
78. Types of AGVs
Guided driverless trains
Guided pallet trucks
Guided unit load carriers
79. Guided Driverless Trains
The Guided driverless trains, also known as towing vehicles or
automated guided tractors, are most commonly used for
transporting large amount of bulky and heavy materials from
the warehouse to various locations in the manufacturing plant.
80. Guided Pallet Trucks
The guided pallet trucks are designed to lift and transport palletized
loads.
It is used for picking up or dropping off loads from and on to floor level.
Thus it eliminates the need for fixed load stands.
There is no need for any special accessories for loading and unloading
the guided pallet except that the loads should be on a pallet.
Usually the following sequence of operations are being carried out in
pallet trucks
Loads are pulled off onto a pallet forks
Lowering of the pallet forks to the floor
Pulling out from the pallet
Finally automatically returns empty to the loading area.
81.
82. Guided unit load carriers
Guided unit load carries have a deck that permits unit-load
transport operation.
They are used in settings with short/medium guide paths, high
volume, and need for independent and versatility.
They are used in warehousing and distribution systems.
They can operate in an environment where there is not much
room and movement is restricted.
83.
84. Applications of AGVS
Automated Guided Vehicles are used in a variety of areas to
support processing and handling throughout a manufacturing
facility.
Assembly
Kitting
Transportation
Staging
Warehousing
Order picking
Parts/just-in-time delivery
Transfer/shuttle
85. Applications of AGVs based on
types of AGVs employed
Driverless train operations
Storage and distribution operations
Assembly line applications
Flexible manufacturing systems.
86. Vehicle Guidance Technology
The goal of an AGVS guidance system is to keep the AGV on track
or on predefined path.
Types of AGV Guidance approach
Fixed-route guidance method
Free – route guidance method
87. Fixed-route guidance method
Fixed route guidance is to set medium guidance information in
the path, AGV can drive with it, such as electromagnetic
guidance, tape guidance, etc.
88. Free – route guidance method
Free-route guidance stores the size of the coordinates, AGV can
identify current position and decide driving path, such as laser-
guidance and image recognition guidance.
89. Types of vehicle Guidance
Technologies
There are many AGV guidance technologies/methods available
and their selection will depend on need, application, and
environmental constraints.
Wire guidance system
Paint strips system
Self-guided vehicles
93. Traffic control
The purpose of traffic control in an automated guided vehicle
system is to minimise interference between vehicles and
prevent collisions.
Methods of traffic control
Forward-sensing control
Zone sensing control
Combinational control
96. Vehicle Dispatching
For an effective functioning of AGVS, AGVS must be dispatched in
a timely manner, as and when they are needed.
Dispatching methods:
Vehicle Dispatching using On-board control panels
Vehicle Dispatching using Remote call stations
Vehicle Dispatching using Supervisory central computer control
Combinatorial method
97. Vehicle Safety
An automated guided vehicle system should be designed taking
into account the safety of human personnel in the shop floor.
Safety features provided for AGVs:
Movement speeds of less than walking pace
Automatic stopping of the vehicle
Obstacle detection sensors on the vehicle
Emergency bumper
Additional features