Control of manufacturing systems

Slovak University of TechnologyFaculty of Material Science and Technology in Trnava

Manufacturing System

A Manufacturing System can be defined as the means to operate and control processes that add value to a product.

Manufacturing System is its ability to replicate the product profitably.

Basic subsystems

SkupinypracovískSkupiny

pracovískGroups of

workstations

Transportsystem

Storagesystem

Groups ofworkstation

s

Manufacturing Process Layout

L

L

L

L

L

L

L

L

L

L M

M

M

M

D

D

D

D

D

D

D

D

G

G

G

G

G

G

P

P

A A AReceiving andShipping Assembly

Painting Department

Lathe DepartmentMilling

Department Drilling Department

Grinding Department

Analytical processSi

Vj-1

Vj

Vj+1e.g. chemical-physical analyzea

Syntetical process Vj

Si-1

Si

Si+1 e.g. Assembly process

Materially neutral processSiVj

e.g. rolling

Si = inputsVj= outputs

The structure of production process according to material flow

Analytical-syntetical process

Si-1

Si

Si+1

e.g. open production

Vj-1

Vj

Vj+1

Flexible manufacturing system

A system that consists of numerous programmable machine tools connected by an automated material handling system

A flexible manufacturing system (FMS) is a manufacturing system in which there is some amount of flexibility that allows the system to react in the case of changes, whether predicted or unpredicted. This flexibility is generally considered to fall into two categories, which both contain numerous subcategories.

Flexibility

The first category, machine flexibility, covers the system's ability to be changed to produce new product types, and ability to change the order of operations executed on a part.

The second category is called routing flexibility, which consists of the ability to use multiple machines to perform the same operation on a part, as well as the system's ability to absorb large-scale changes, such as in volume, capacity, or capability.

FMS

Most FMS systems comprise of three main systems. The work machines which are often automated CNC machines are connected by a material handling system to optimize parts flow and the central control computer which controls material movements and machine flow.

FMS

PartsFinished

goods

Load Unload

Computercontrolroom

Terminal

Machine Machine

Tools

Conveyor

Pallet