Design and simulation of manufacturing systems using simulation software for advanced planning and scheduling

První část práce je zaměřena na základní pojmy týkající se výrobního procesu, typy plánování a rozvrhování výroby. Dále pak na metody a filozofické koncepce plánování a rozvrhování. Druhá část práce se zabývá systémem APS a jeho implementací v simulačním softwaru Asprova. Pomocí softwaru Asprova je vytvořen simulační model, který je následně optimalizován.The first part of the work is focused on basic concepts relating to the manufacturing process and types of production planning and scheduling. Furthermore, the methods and the philosophical concept of planning and scheduling. The second part of the thesis deals with the APS system and its implementation in the simulation software Asprova. Simulation model, which is subsequently optimized is created using the Asprova software.

The effect of castration method of pigs on growth, carcass value and pork quality

This thesis describes the issue related to the influence of pigs castration methods on their growth, slaughter value and meat quality. Nowadays, it is legal the surgical castration within anaesthesia in young boards, younger than 7 days. This method is the most used by pig breeders for several reasons, but especially it is neither financially or time demanding. Even though this surgical invention should be performed by veterinarian, but due to it simplicity it is performed by educated farm workers in practice. The problem will occur in 2018. In this year the surgical castration without anaesthesia will be prohibited because of animal pain and the effort to improve animal welfare. The main reason of piglet castration is the boar taint, which is connected to sexual maturation and hormone activity. The main substances, which caused the boar taint, are androstenone, skatole and indole. Androstenone is a steroid hormone produced in the testis with the typical urine like odor. Skatole is the substance with fecal odor and it is produced in the hind gut. Another reason for piglet castration is higher activity, even aggression in non-castrated pigs. The aggression is a negative effect causes injuries between animals. The next negative effect is the aggression against breeders. Based on these facts, there are numerous studies focused on possible solutions of this problem. There are describes surgical castration with local or total analgesia. The most practical, seems to be the local analgesia. Another method is the immune castration, where it is based on the hormone castration. There are applied 2 injections with the time lag. The first is applied in 13 to 16 weeks old pigs, the second in 21 to 22 weeks old pigs. The alternative method for relieving the pain is the boar fattening, where is important to decreased the aggression and level of boar taint by different methods. One of the methods is fattening pigs to lower slaughter weight (between 80 to 90 kg), or the breed choice. An interesting method is also sperm sexing, where is an effort for the highest female production. However, this method is not relevant for everyday practice, due to its difficulty

New series of ball screws

This thesis deals with construction of rotary-nut ball screw. In the first chapter technical research at the current state of linear positioning systems and matters associated with them is listed. The next chapter treats of basic concepts and designs referring to ball screws. Further on the boundary between rotary ball screw and rotary- nut ball screw is described. On basis of restrictions and selected criterions solution of one size of rotary – nut ball screw with all the calculations

New series of ball screws

Tato práce se zabývá konstrukcí kuličkové rotující matice. V úvodu práce je provedena rešerše na současný stav ve stavbě přímočarých polohovacích os a oblastech s tím spojených. V další kapitole jsou shrnuty základní pojmy týkající se KŠM a jsou popsány současné konstrukce rotující matice. Poté se práce zabývá hranicemi mezi rotujícím kuličkovým šroubem a rotující kuličkovou maticí. Na základě omezení a zvolených kritérií jsou doporučeny parametry pro rotující matici. V poslední kapitole je provedeno konkrétní řešení jedné velikosti rotující matice s potřebnými výpočty.This thesis deals with construction of rotary-nut ball screw. In the first chapter technical research at the current state of linear positioning systems and matters associated with them is listed. The next chapter treats of basic concepts and designs referring to ball screws. Further on the boundary between rotary ball screw and rotary- nut ball screw is described. On basis of restrictions and selected criterions solution of one size of rotary – nut ball screw with all the calculations.

Vliv bóru na vlastnosti ocelí

Import 20/04/2006Prezenční výpůjčkaVŠB - Technická univerzita Ostrava. Fakulta metalurgie a materiálového inženýrství. Katedra (636) materiálového inženýrstv