The paper puts forward and implements a method of designing and creating a modelling simulation environment for extensive and complete analysis of economical lighting on highways. From a general design viewpoint, the proposed solution explores the concept of a network description language (SMOL), which has been designed to describe the necessary network functions, mechanisms, and devices for the purpose of their computer simulation and verification. The presented results of the performed research confirm the usability of intelligent lighting on highways, both in the sense of the design concept and in the aspect of saving energy.
The manufacture and consumption of market products show ever growing trends, and this means not only the supply and demand volume but also, to a higher and higher extent, searching for new products distinguishable from the variety of products on the market. Thus, it is necessary to find methods of functional, logical and structural combination of the so far existing engineering applications like CAx, RP/RT/RE, PDM/TDM, PPC/ERP, CE/SE and RDBMS techniques. A new challenge imposed on manufacturers by the competitive market is the so-called “product customization”, i.e. attending to an individual customer’s requirements in the features of a series manufactured product. The general objective of customisation is to elaborate features of a product, manufacturing processes, documentation and production organisation in such a way that the product’s individual features meet the customer’s requirements and its manufacturing process, price and service do not stray from series manufactured products.
The paper presents the issue of production processes improvement in foundries in the area of finishing treatment of iron casts
manufactured on automated foundry lines with vertical or horizontal mould division. Due to numerous factors which influence
the efficiency of the processes, multi-criterion assessment tools were proposed in order to select the optimal solution for the assumed
criteria. After determining the criteria weight using the Saaty method, a simulation experiment was designed and carried out which
presents possible scenarios of casts finishing treatment operations. Basing on experiment reports from a computer model, particular
solutions were evaluated using the Yager’s method. The evaluation of the experiment results was performed by experts who assessed
different options according to each of the criteria adopted. After the establishment of the total standardized ratings by averaging the scores
given by individual experts, the final decision was generated. Using the presented method, the best solution was chosen from among
the analyzed scenarios.
The paper presents a practical example of improving quality and occupational safety on automated casting lines. Working conditions
on the line of box moulding with horizontal mould split were analysed due to low degree of automation at the stage of cores or filters
installation as well as spheroidizing mortar dosing. A simulation analysis was carried out, which was related to the grounds of introducing
an automatic mortar dispenser to the mould. To carry out the research, a simulation model of a line in universal Arena software
for modelling and simulation of manufacturing systems by Rockwell Software Inc. was created. A simulation experiment was carried out
on a model in order to determine basic parameters of the working system. Organization and working conditions in other sections of the line
were also analysed, paying particular attention to quality, ergonomics and occupational safety. Ergonomics analysis was carried out
on manual cores installation workplace and filters installation workplace, and changes to these workplaces were suggested in order
to eliminate actions being unnecessary and onerous for employees.
The paper presents a practical example of improvement of foundry production systems in terms of post-finishing of nodular iron castings
produced in the conditions of bulk production for automotive industry. The attention was paid to high labour-intensive efforts, which
are difficult to be subjected to mechanization and automation. The times of actions related to grinding processing of castings in three
grinding positions connected with a belt conveyor were estimated with the use of a time study method. A bottleneck as well as limiting
factors were specified in a system. A number of improvements were proposed, aimed at improving work organization on the castings postfinishing
line. An analysis of work ergonomics at the workplace was made in order to eliminate unnecessary and onerous for the employee
actions. A model of production system using the Arena software, on which a simulation experiment was conducted, was drawn up in order
to visualize the analysed phenomena. The effects of the project were shown on graphs comparing times, costs, work ergonomics and
overall efficiency of production equipment indicator.
The article presents an analysis of stresses in the current tool system of the die during the implementation of the third forging operation of the screw M12 class 10.9 with cylinder head and hexagonal socket. It was assumed that the level of negative cracking due to stress can be reduced by using a mounting interference between the die and the tube blank. Due to the design of the tool system value of the die, the interference value cannot be too large. Therefore, an analysis of the influence of the interference between the die and the tube blank in a die tool system on the value and distribution of stresses in the individual components. An analysis of the assembly stresses and the stresses occurring during the process of deformation of the shaped head of the screw was done. The calculations were performed using a commercial software package MARC / Mentat.