Manufacturing Resource Models

IE550

Dr. R. A. Wysk

A Resource Model

• Something like a list of things (resources)

• Something like an architecture of these things

• Some type of capabilities model

Things in a Manufacturing System

• Men

• Materials

• Machines

• Money

Men

• Agents used to plan and conduct material transformation– Normally used in conjunction with some

machine

Material

• The entity that gets transformed or gets used in the transformation– Material is usually referred to as product

substance, i.e., raw material

Machines

• Entities that are used to increase power, precision and direct a material transformation– Many classes of machines

• Machines within machines

Money

• The entity that makes getting men, material and machines possible.

Types of Architectures

• All kinds of architectures in a manufacturing facility– Physical– Logical– Organizational

Functional Architecture

• How tasks relate to each other

• Sales

• Marketing

• Order entry

• Production control

• Process planning

• Etc.

Equip Equip Equip Equip Equip Equip

Wkstn WkstnWkstnResource Manager

Shop

A Collection of Controllers

Planning Scheduling ExecutionEquip Operations-level

planning (e.g. tool pathplanning)

Determining the start/finishtimes for the individualtasks. Determining thesequence of part processingwhen multiple parts areallowed.

Interacting with themachine controller toinitiate and monitor partprocessing.

Wkstn Determining the partroutes through theworkstation (e.g.selection of processingequipment). Includesreplanning in response tomachine breakdowns.

Determining the start/fininshtimnes for each part on eachprocessing machine in theworkstation

Interacting with theequipment levelcontrollers to assign andremove parts and tosyunchronize theactivites of the devices(e.g. as required whenusing a robot to load apart on a machine tool).

Shop Determining the partroutes through the shop.Splitting part orders intobatches to match materialtransport and workstationcapacity constraints.

Determining the start/finishtimes for part batches ateach workstation.

Interacting with theworkstation controllersand the ResourceManager todeliver/pickup parts.

A Hierarchical Controller Architecture

Connectivity Graph

• Adjacency relationships

• Connects product flow

Physical Model - Processing Workstation

S

po rt_a rr ive

port_p ickport_depart

bs_p ick bs_put

port_put

E

Po rt MH

B S

mp_pickmp_put

MP

mp_pick

mp_put

MP

Fadal CNC Machining Center

Fanuc M1L Robot

Daewoo Puma 6 Turning Center

Classes of Equipment Resources

• Material Processors

• Material Handlers

• Material Transporters

• Warehousing

• Buffers

Fadal VMC-20 Table size: 29.5"x16"

Floor to table surface: 30" T-slots (No. x Width x Span): 3x.562"x4.33"

Cutting feed rate: 0.01"-250" Rapid feed rate: 400"/Min

Max. weight on table: 1,000 Lbs Axis drive motor: DC, 1,800 Lb. Thrust

Ball Screw size: 1.25" Dia. X/Y/Z Longitutinal (X axis): 20"

Cross (Y axis): 16" Vertical (Z axis): 20"

SPindle nose to table: 4"-24" Main motor: 7.5 HP, 5.6 KW

Torque: 135 FT-lbs Accuracy, axis positioning: +/- 0.0002" Accuracy, axis repeatability: +/- 0.0001"

Glass scales: N/A Spindle speed: 75-6,500 RPM

Tooling