Desenvolvimento de um equipamento mecânico para rachar lenha

Abstract

Firewood is a renewable fuel and is currently gaining more space due to the high fuel prices. To meet this demand, small farmers who sell it are replacing manual labor to split it by mechanical equipment. Considering this, a comparison was made with some models available in the market, verifying the power, type of mechanism used, number of divisions, and the cost of the equipment. With this, a hydraulic model firewood splitter was designed, following the stages of informational project, conceptual project and detailed project, thus identifying the main needs of the customer, so that the product can meet what was requested. The firewood splitter offers more productivity, ergonomics and is easy to operate. A part of this work seeks to identify the efforts that the wood makes on the blade according to the cutting angle. Thus, tests were performed with eucalyptus trees, ten experiments were performed for each blade, each with a different angle, namely: 15, 20 and 30°. Thus, identifying the most efficient 15° angle, with the data of average blade forces of 22.3 kN, the necessary mechanical structure of the equipment and its power source and hydraulic system for operation can be dimensioned. After these steps were followed, the final product was designed, and the parts that compose the splitter were detailed, obtaining a product cost estimate of R$ 11,350.00. [resumo fornecido pelo autor]