Transfer Automated Production Lines
Automated Production Lines
multiple workstations linked by work handling system transferring parts between stations (in cycles-same to manual),
conditions for automated line,
high product demand--quantities
stable product design--frequent design changes
long product life >1 year
multiple operations on product
benefits,
low: direct labor content
product cost because cost of fixed equipment (spreaded over units)
Minimize: production lead times, WIP, factory floor space
high: production rates
Palletized vs. Free transfer line- avoid cost Pallet Fixtures
->accurate workholding device
->fixtures part in a location to be moved
->clamped in position at successive workstations by transfer system
Work Flow system configurations
1. in-line: a sequence of stations in a straight line machining big work pieces
2.segmented in-line: >1 straight line transfer sections, segments perpendicular to each other , allows reorientation of work piece for different machining
3.rotary: smaller workparts are attached around circular indexing worktable (in fixed angular amounts-cheaper)
Geneva mechanism
Reasons to Using Storage buffers
(mostly in in-line than rotary index machine)
-reduce effect of station breakdowns
-provide :bank of parts to supply the line
place to put the output of the line
-allow curing time/other required delay
-smoothen cycle time variations
2 Controls of production line when encountering defects in quality control
->memory: to keep the line running, locking out affected work
->instantaneous: stops the line
Analysis of automated production lines[transfer lines] in process&system technology
multiple workstations linked by work handling system transferring parts between stations (in cycles-same to manual),
conditions for automated line,
high product demand--quantities
stable product design--frequent design changes
long product life >1 year
multiple operations on product
benefits,
low: direct labor content
product cost because cost of fixed equipment (spreaded over units)
Minimize: production lead times, WIP, factory floor space
high: production rates
Palletized vs. Free transfer line- avoid cost Pallet Fixtures
->accurate workholding device
->fixtures part in a location to be moved
->clamped in position at successive workstations by transfer system
Work Flow system configurations
1. in-line: a sequence of stations in a straight line machining big work pieces
2.segmented in-line: >1 straight line transfer sections, segments perpendicular to each other , allows reorientation of work piece for different machining
3.rotary: smaller workparts are attached around circular indexing worktable (in fixed angular amounts-cheaper)
Geneva mechanism
Reasons to Using Storage buffers
(mostly in in-line than rotary index machine)
-reduce effect of station breakdowns
-provide :bank of parts to supply the line
place to put the output of the line
-allow curing time/other required delay
-smoothen cycle time variations
2 Controls of production line when encountering defects in quality control
->memory: to keep the line running, locking out affected work
->instantaneous: stops the line
Analysis of automated production lines[transfer lines] in process&system technology
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