Planning in production systems

1. Slovak University of Technology Faculty of Material Science and Technology in Trnava Planning in production systems

2. Development of automation engineering manufacture • conventional machines • conventional machines - NC machines - CNC a DNC control - flexible production systems PPS - CIM computer integrated manufacturing • CNC (Computer Numerical Control) control system of production device, which is connected direct to the local control microcomputer, where is the own program saved • DNC (Distributed Numerical Control) • is characteristic by flexible distributed control of several production machines from one center.

3. Device production Computer integration Data networks Computer control Program control Mechanization Term 1950 1960 1970 1980 1990 Figure 1: Development of production systems

4. Main components of production system – subsystems • technological – geometric and physical – chemical attributes change of the component • transportation and handling – set of transportation and handling tools to material, semi finished products and components movement between single workplaces of production process • store system – input, interoperated and output stores • check - input, interoperated and output control • control and information – set of control and informational tools

5. Production system Control subsystem Managing and information subsystem Technological subsystem Transportation and handling subsystem Store subsystem Figure 2: Components of the production system

6. Flexible Manufacturing Systems • has open character, manufacturing orders can be awarded continuously during planning period • mutually interchangeable workplaces • manufacturing orders can be splitted up into parallel workplaces • during planning period occur to failures • possible alternative technical procedure • minimally manual strikes • minimal time to conversion

7. Main parts of the PVS • processing NC a CNC • devices to interoperating transport and manipulation • devices to operating transport – purpose devices, manipulators, industrial robots • components and tools carriers – Setting and positioning problem is solved, establishment and fixing components

8. PVS tasks - provide especially • production • control • harmonization main and helping activities • control manufacturing quality • monitoring a scan • transport and storing - resolution store spoil, transport roads • PVS disadvantages • high capital costs • complex control system • risk haywire of individual devices and thereby too entire system

9. Elastic production system (PVS) • mono or various technological devices with system to ensure his functions in mechanical regime • automated production system, wherein oneself change production schedule solve by changing dating base • is possible to divide him into following parties: • elastic production complex • elastic Computer Integrated Manufacturing • automated cartage - store system

10. PVS by organizational structure • elastic production cell • plicate from technological machinery with code control with resources of the automation technological process, which works autonomous • elastic automated line • includes several production cells arrange in order of sequence technological operations and controlled by one direction system • elastic automated working • to product certain assortment parts • elastic automated plant

11. Production planning in PVS • working-out monthly operational plan products for PVS • designation basic terms and advances for preparation production, safety and preparation of material,tools,documentation, subdelivery and co-operation • operational plan • his part -> orientation terms commencement and ending production • at his base and real state in PVS oneself work out short-time operational plan

12. short-time operational plan • designates commencement and ending production individual productional batches • establishes priority of individual operations • worked out weekly on fortnightly period