Análise do sistema de medição em uma linha produtiva de radar

In this work, we analyze a measurement system that will be implanted in a wheels production line, in order to use those wheels for buses and trucks. The measurement device has to be approved according to the MSA study, due to the fact that the mentioned industry is an automobilistic supplier, so that it has to be conform with the ISO/TS 16949 standards. We showed the MSA studies, as well as some concepts for the work understanding. The airlock wheels systematic production is also broached, that is to say, wheels that use airlock tyres, with a better attention given to the rim production, where the device must be implanted. We analyze and assess the data’s acceptance according to the guidelines showed in this study, along with this, improvement proposals are elaborated and their analysis is made, in order to check the obtained results. Finally, we survey the analyzed measurement system, and new studies are suggested, with the intention of improving it

Dimensionamento de suspensões veiculares para isolamento de vibrações excitadas pela via

This work intends to perform the dimensioning of the Guaratinguetá’s Engineering College Baja SAE vehicle suspension system. To do so, concepts of suspension systems, human comfort limits to vibrations and automotive models for suspension vibration analyses are reviewed. On the development of this work descriptions of considerations specific for the vehicle object of this work are made as well as descriptions of the experiment made to determine the stiffness of the tire used. These concepts are applied through a computational routine that allows the dimensioning of springs and shock absorbers of both front and rear axles of a vehicle in a way to respect all the criteria showed during this work and visualize the system’s behavior when excited on different frequencies

Análise dos efeitos das deformações estruturais sobre a transferência transversal de carga em um veículo do tipo fórmula SAE submetido a uma aceleração lateral constante

This paper studies the frame deformations on a formula SAE vehicle in steady-state cornering and its influence on the lateral load transfers and, consequently, on the tires normal loads due to the applied lateral load. For a vehicle with a perfect rigid frame, the vehicle mass, the position of the center of gravity and the suspensions are the only factors responsible for the load distribution between the tires. When the frame deformations are no longer negligible, the frame deformations affect the loaddistribution between the tires. The frame flexibility turns it able to behave as an additional set of springs to the suspension system, thus changing the behavior of the set. This paper describes howit happens and suggests ways to minimize this phenomenon

Desempenho de trator agrícola em operação de preparo do solo utilizando diesel e proporções de biodiesel de babaçu

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Opacidade da fumaça do trator agrícola funcionando com biodiesel etílico destilado de babaçu e diesel B S10 em períodos do dia

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Biodiesel etílico de babaçu x diesel B S1800: ensaio de opacidade da fumaça do trator agrícola variando os horários do dia

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Análise de blocos de concreto com resíduo de borracha de pneu e metacaulim

Pós-graduação em Engenharia Civil - FEIS

Análise estrutural de tubos de concreto armado com resíduo de borracha de pneu

Pós-graduação em Engenharia Civil - FEIS

Desempenho de tractores florestais processadores

A time-and-motion study in wood processing of the Eucalyptus harvester's operational cycle was developed. The objective was to evaluate wood harvesters working under several site conditions. The research includes two kinds of harvesters while processing wood to supply paper and cellulose factories, as follows: a machine with twin tires and other one with large tracks, both connected to a different head harvester models. The forestry species were Eucalyptus saligna Smith and Eucalyptus grandis Hill ex Maiden, seven and eight years old, in slope terrains ranging from 0% to 10% degrees, under harvesting systems used by Votorantim and Suzano forestry companies, in São Paulo State, Brazi. Considering all field research, results disclosed that, for some conditions, both machines have shown mathematical correlation between some mechanical wood operation within the processing operational cycle and the saw logs production. All the mathematical correlations were found to express logarithmical models.

Conformidade ergonômica dos controles no posto de trabalho do operador de trator: estudo de caso NH 7630

This article discusses an ergonomic analysis of the controls used by tractor operators, covering their positions in relation to the casing of your job. Was performed an assessment of the controls of the job of a model NH 7630 tractor average power of 74 kW (100 CV), using the norms of the ABNT. With this screening could detect the positive and negative. Then was accomplished an analytical study of the controls. Evaluation results show that some controls of tractors have errors evaluated in relation to NBR/ ISO 6682.

Comparativo ergonômico de duas metododologias para aquisição de coordenadas tridimensionais do posto de trabalho do operador de trato

This research aimed to the comparison between two methods for obtaining three-dimensional coordinates of the controls of the upper limbs of the job of the tractor operator. The methods used were based on NBR / NM / ISO 5353 - Road machines, tractors and agricultural and forestry machinery – Reference point of the seat. The first method used follows the principles recommended by the standard NBR/NM/ISO/5353 The second method is an adaptation of this standard with the introduction of a laser measuring equipment developed by Silva (2009). The results were compared statistically to evaluate differences between the methodological processes involved. In this research, data was collected thought a brand new tractor Massey Ferguson model MF 292, awarded by the dealership from Londrina. The results have shown a considerable variation between the traditional measurement process and the laser measuring. It must be considered that this variation can be used to calibrate the tractor controls positioning, therefore the tractor is not in accordance to ABNT.

Qualidade estrutural em latossolos compactados cultivados com milho

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

O circuito espacial produtivo dos fertilizantes no território brasileiro

This paper has two main objective the study of the productive space circuit of fertilizers in Brazil. For this, we study the company's operations Vale Fertilizers SA More specifically, the production and consumption of fertilizers in Brazil. In the current globalization the Brazilian countryside know new ways of doing (SANTOS, 1994). This, with less roughness, adopts the Green Revolution package, and introduces inputs to the soil, such as seeders, combines, tractors, herbicides, fungicides and fertilizers (Santos & Silveira, 2001). The examination of the Brazilian case as the agricultural modernization reveals the great vulnerability of modern agricultural regions in the face of globalizing modernization (Santos, 2000: 92). The places that receive capital reproduction of imperatives gain a new medium, is the formation of informational scientific technical means, are the bright spots corresponding to other places (Santos, 1994). Thus, the productive circuits are no longer confined to the environment, but establish connections with distant places (Santos, 1986; Frederick & CASTILLO, 2004). What's more, the policy is now made in the market (Santos, 2000, p.67) and the adoption by the Brazilian government's neoliberal policies, the Brazilian state-owned companies related to fertilizer production circuit are privatized, thereby Brazil makes It is further more dependent on inputs used in the field, including fertilizers

Incidência de barreiras técnicas ambientais chinesas sobre a pauta exportadora brasileira: 2001-2014

As relações entre Brasil e China vêm se estreitando ao longo dos anos, principalmente após a entrada da China na OMC em 2001, o que os tornou grandes parceiros comerciais. Esse padrão de comércio é marcado pela exportação de produtos brasileiros abundantes em recursos naturais e importação de produtos chineses de alto uso tecnológico. Sendo assim, é notável que a grande expansão da economia Chinesa reproduz grandes impactos no meio ambiente. Entretanto, o governo Chinês mostra sinais de preocupação e está buscando formas de amenizar os problemas. Como a prioridade do governo é a prevenção de mais danos ambientais, o uso de barreiras não tarifárias de caráter ambiental é cada vez mais frequente. O presente trabalho analisa o uso dessas barreiras técnicas e seus impactos na exportação de produtos brasileiros à China. Foram calculados coeficientes que mostram, junto a outros dados empíricos, que há uma forte proteção dos produtos Reatores Nucleares (HS84), Máquinas e aparelhos elétricos (HS85) e Automóveis e tratores (HS87) quanto a essas barreiras

Qualidade da operação na cultura da cana-de-açúcar utilizando cartas de controle

Pós-graduação em Agronomia (Ciência do Solo) - FCAV