A microestrutura de uma peça temperada determina suas características mecânicas. Dessa forma, torna-se fundamental conhecer os parâmetros que influenciam na formação da estrutura do componente tratado com função dos tratamentos térmicos aplicados, permitindo obter melhorias de qualidade de uma peça frente a sua aplicação. Métodos distintos podem ser empregados para obtenção da camada de têmpera. Entretanto, esses métodos devem ser parametrizados adequadamente para garantir a qualidade do produto final. No trabalho em questão, aplicaram-se dois metódos distintos de têmpera: por indução e por condução para obtenção da camada martensítica, dureza e durabilidade requerida em cremalheiras de aço SAE 1045, utilizadas em mecanismo de direção automotiva. Fabricou-se um lote de peças, do qual metade das peças foram tratadas por indução e a outra por condução. Após a têmpera e após o revenido, foi avaliado o nível de empenamento, a dureza superficial, a microdureza, a microestrutura formada. A peças após o término do processo de fabricação, foram montadas no sistema caixa de direção, sendo realizados ensaios de durabilidade e impacto dos mesmos. Os tratamentos realizados demonstraram resultados de empenamento, dureza, microestrutura e ensaios de durabilidade e impacto no produto final, dentro das especificações. O processo de têmpera por condução levou a melhor micrestrutura, mais alta dureza e menores níveisde empenamento comparado com o processo de têmpera por indução. Mas, também constatou-se que é possível desenvolver melhorias no processo de indução para atingir-se resultados melhores. / The microstructure of a hardened part is determining its mechanical characteristiscs. Thus, the knowledge of pararameters influencing the heat treated part’s microstructure is of fundamental importance. This allows to obtain quality improvements for specific applications. Diferent methods can be used for the obtation of a hardened layer. However, in these methods the parameters have to be correctly set to reach the final product quality. In this work, two diferente techniques were applied, induction and conduction surface hardening to obtain a required martensitic layer depth, hardness and durability of SAE 1045 steel racks used in automotive driving systems. A batche of parts were manufactured, being half of the parts surface hardened by Induction and half by conduction. After hardening and after tempering, the warpage level, surface hardness, microhardness and microstructure were investigated. The parts were mounted in a steering gear system and then endurance tests and impact tests were carried out. The results of warpage levels, hardness, microstructure and endurance tests, as well as the impact tests were in the range of the specifications. The conduction hardening process leads to better microstructure, higher hardness and lower warpage levels compared to induction hardening. But it was found that the Induction hardening can be optimized to reach better results.

The paper evaluates technological, economic and construction aspects of the component production and the design of the tool serving for large-scale production of the S355MC steel rack component. Use of a progressive tool combining cutting and bending operations in four steps has been decided as the most appropriate according to literature study. Based on the need of production of two plane-symmetrical pieces at a time, the tool will produce both pieces simultaneously, which is economically advantageous. The tool is designed for use on the Arisa 630t mechanical press. Material will be winded off the roll, flattened and pushed into the tool by a precision feeder. The total cost of production of the component was set at 18.80 CZK.

The master’s thesis is focused on creating a company’s computer network and a plan of its implementation. The plan is based on an analysis of the new company building in which the network is supposed to be implemented and consequently specifies specific procedures and elements that will be used during the process of implementation. The thesis includes technical documentation , cost calculation and work plan necessary for the realization of the network.

This diploma thesis deals with construction concept of mechanical rake screen and consists of several main sections. The first section of the diploma thesis covers an overview of the current supply of mechanically scraping rack. In the second section, basic parameters and calculations are solved for the mechanical rack construction concept. In the third one however, analysis of the construction is realized with SolidWorks modeller and the functions of particular parts of the rack is explained. The last section of the diploma thesis focuses on stress control using classic calculation methods and Finite Element Methods (FEM) using a program called I-DEAS.

The diploma thesis submitted solves problems of optimization of goods expedition from rack system of a logistic store. It concerns solution of a practical task which optimizes a passage route through the rack system and evaluates individual orders for creation of optimal expedition dispatching batch. The existing dispatching system, use of sources and creation of time schedule is being described at the beginning. Description of general practical solutions of seeking the shortest way through the graph through appointed nodes follows. Chosen solution and its practical implementation are introduced afterwards. Comparative tests with existing system and their evaluations are mentioned at the end of the thesis.

This diploma thesis Hydraulic rake screen deals with the design of the hydraulic screen cleaning device with a stroke of 1800 mm, which will be placed in 1000 mm wide flow chanell of the wastewater treatment facility. This paper contains structural optimalization of the structure due to operating conditions and loads, mechanical strength calculations and drawings of the device and its details.

The goal of this thesis is to propose a new warehouse of spare parts. The first part describes the theoretical analysis of mentioned problems. This is followed by an analysis of the current situation in the company warehouse and analysis of information storage system SAP. The main part consists of determining the inventory, location of warehouse, storage equipment choice and a draft layout. Based on an evaluation by selected criteria was identified advantageous variant. The conclusion is devoted to the economic evaluation of the implementation of the warehouse of spare parts.

The Diploma’s thesis deals with a construction design of a service platform for a horizontal boring machine. Input parameters are cabin dimensions, length and velocity of lift and shift. In the first part of the thesis is design arrangement solved. The lift is solved by a rack and a pinion. By the lift is drive design and gear calculation performed. Shift of the service platform is done by toothed belt. Air distribution with pneumatic parts choice is included in this thesis. Next part is divided to supporting frame and cabin design. It is made by welded profiles, in which a stress-strength analysis is performed. The last part of the thesis is divided to linear guide design. A part of this thesis is a drawing of an assembly facility and a movie about this service platform in a real service.

In this thesis analyze in detail issue Bootloader for microcontrollers AVR and made proposal for implementation to the device Sci-Trace. Modification electronics part deal with patch board, where used connect between others module and control board. Control Board handle with computer and individually module. Example others module are control optics or control stepper motors. From user interface is resolve choice information display for show temperature inside the device. From mechanical part is resolve store electronic part to the rack section. From programming part is create firmware for control board and others module. For users operation is create program for operation system for upgrade application firmware to microcontroller.

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