Unit 4 cim
- 1. UNIT 4
- 2. 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.
- 3. 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.
- 6. 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”
- 7. Tests of Flexibility Part variety test Schedule change test Error recovery test New part test
- 9. Types of Flexibility Machine flexibility Production flexibility Mix (or Process) flexibility Product flexibility Routing flexibility Volume (or capacity) flexibility Expansion flexibility
- 10. 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
- 11. 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
- 12. 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
- 13. 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
- 14. 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
- 15. 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
- 16. 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
- 17. 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
- 18. 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
- 19. 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.
- 20. Classification based on the number of machines in the system Single Machine Cell (SMC)