Assembly lines Flashcards
Production Lines importance
- for large quantities (high prod. volume)
- total work divided into different small task with higher efficiency
Production rate
determined by the slowest station (bottleneck station)–> longest cycle time
Types of Production line
Single model line: produces only one model with no model variation
Batch model line: more than one model but with changing time (production in batches)
mixed model line: multiple models are produced intermixed than in batches
Technologies of production lines
- manually (made by humans)
Problem: balancing - automated production lines
Problem: reliability
Line balancing
Perfect line balancing is nearly impossible–> some workers will end up with more work than others:
- total work content can be divided into minimum rational work elements
- those elements must be grouped into logical tasks
- -> precendence constraints prevent a fair allocation of work elements
production rate vs production cycle time
Production rate: pieces/hour
Production cycle time: hour/piece
Takt time
max CT in order to achieve product demand
Automated production lines
-automated work stations connectec with a part transport system
- ideally, no workers are at stations except from:
–> tool changing
—> service and maintenance
Two basic types of automated p lines:
1. lines that perform processing operations
2. lines that perform assembly operations
Layouts automated p lines
- in line
- circular (rotary)
- caroussel
Types of automated production lines
- single station assembly
- often organized around one robot - multiple station assembly
- mass production of small products
