Les produits longs se distinguent par une dimension, généralement la longueur plus importante que la hauteur et la largeur, à titre d'exemple les rails de chemin de fer. Ces produits sont obtenus par déformation plastique à chaud puis refroidissement. Au cours du processus de fabrication, l'hétérogénéité du refroidissement et de la déformation plastique induisent un défaut géométrique de rectitude. Pour parachever la rectitude du produit, un redressage à froid est alors nécessaire. Souvent des dresseuses à galets sont utilisées pour corriger la rectitude du centre de produit, cependant, il reste les abouts. Ces derniers sont redressés au moyen d'une presse à partir de l'image de leurs profils obtenus par mesurage optique. La procédure de mesure/redressage est répétée jusqu'à la conformité du produit. Le temps de réalisation est variable, il dépend de l'apprentissage des paramètres clés liés à la géométrie et au matériau du produit à redresser. Compte tenu des exigences de plus en plus sévères sur la rectitude des produits longs d'une part et une volonté d'augmenter la productivité d'autre part, l'objet de ce travail de recherche consiste à optimiser le procédé de redressage des abouts de produits longs. Dans un premier temps, les déformations élastiques générées au cours du mesurage d'un produit long ont été filtrées. Ensuite, les erreurs des moyens de mesure ont été séparées de la mesure du produit au moyen d'une analyse couplée ce qui a permis une meilleure évaluation de la rectitude du produit. Par ailleurs, en se basant sur l'image du profil du produit, une méthodologie de redressage semi-automatique a été mise en place. Cette dernière est essentiellement basée sur une interaction entre la métrologie et la mécanique et représente une contribution à l'automatisation du procédé de redressage des abouts des produits longs. / Long workpieces are characterized by one dimension, usually length is larger than the height and width, for example, railway rails. These products are obtained by hot rolling and then cooling. During manufacturing process, heterogeneity of cooling and plastic deformation induced straightness error. In order to correct this geometrical error, cold straightening process is necessary. Usually, straightening machines are used to correct the straightness of the workpiece center however; the ends' sides were still not straightened. Based on the optical measurement profile, these ends are straightened by mechanical press. The measuring/straightening closed loop is repeated until the straightness of the product is conformed. The process time depends on the knowledge of key parameters related to geometry and material of workpiece. The objective of this research work is to optimize straightening process of the ends of long workpieces. As a first step, the elastic deformation generated during the measurement of long workpiece has been filtered. Then, a coupled analysis of measurement was used to separate error of machine measurement from workpiece measurement, which allowed a better assessment of workpiece straightness profile. Furthermore, based on straightness profile, a semi-automatic straightening methodology has been developed. It is essentially based on an interaction between metrology and mechanics and it is a contribution to the automation of straightening process for ends parts of long workpieces.

The diploma thesis deals with the design of a rotary table for machining large non-rotary workpieces up to a maximum weight of 65 000 kg. The aim of the work is to analyze and evaluate the current state of knowledge in the field of rotary tables, to create a table design according to the assignment and its 3D model with part of the drawing documentation. The theoretical part of the work searches for solutions used in the construction of rotary tables in the category of table according to the assignment. The information obtained is further used in the design of rotary table solution variants. By evaluating the weight of the required properties and their degree of fulfillment, a variant of the design solution of the table is selected, which is then designed. The individual design steps are described and explained in the text part of the work accompanied by pictures and calculations. The result of the process is a structural design of the mechanical part of the rotary table with a 3D model and partially processed drawing documentation. The contribution of the work is the summarization of relevant information for the design of rotary tables, the processed procedure of solving the design of the table and the modeled design of the rotary table. These outputs can be further treated as documentation for the production of the designed table, the development of the rotary table design to deeper details or technical development in this area.

The thesis deals with design of robotic cell for operation with CNC machine. When CNC machine is machining, inactive robot is used for deburring specific edges on the workpiece with help of pneumatic spindles. Thesis include design of end-effectors for handling and deburring operations, design and placement of individual parts of robotic cell. Part of the thesis deals with safety of the cell. Next part of thesis is focus on finding out cycle time of the robot. Robot have to manage cooperate with CNC machine and deburr edges in time. Cycle time is find out at simulation study in software called Tecnomatix Process Simulate. On the end of thesis is technical-economics evaluation