Drills Tools
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Estudo comparativo de diferentes geometrias de corte em broca de metal duro com canal reto em ferro fundido cinzento / Comparative study of different geometries cut with carbide drill straight flute in grey cast iron
O objetivo deste trabalho é comparar o desempenho de duas diferentes geometrias de brocas de metal duro sem cobertura, com canal reto e refrigeração interna, na furação de ferro fundido cinzento. As geometrias avaliadas nos experimentos foram a geometria de ponta normalizada (normal) e uma geometria desenvolvida chamada de geometria de ponta esférica.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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2. Desempenho de Ferramentas Reafiadas - Furação
The present work evaluated the performance of step drills, new and after regrinding. The way of regrinding the drills after they reached the end of tool life criterion was also varied. The following variables were also considered: type of coatings (uncoated, TiAlN e AlCrN) and the routine of re-coating them after regrinding (no recoating, recoating over the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2011
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3. Influence of adhesion between coating and substrate on the performance of coated HSS twist drills
This work analyses the performance of the TiN/TiCN, TiAlN, TiN/TiAlN and TiN/TiAlN/WCC coatings on HSS M2 drills used in the drilling of the aluminium-silicon alloy ISO 3522 AlSi8Cu3Fe, correlating the life of the tools to the coating adhesion characterization experiments. Coating adhesion was characterized using Rockwell C indentation tests and scratch test
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-12
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4. PROJETO E DESENVOLVIMENTO DE MÁQUINA DESTINADA PARA O CORTE DE FIOS DE FIBRA DE VIDRO (ROVING), UTILIZADO PARA A LAMINAÇÃO DE PEÇAS EM PLÁSTICO REFORÇADO (FIBERGLASS) / PROJECT FOR A FIBERGLASS ROVING CUTTER, A MACHINE USED IN THE MAKING OF REINFORCED FIBERGLASS PARTS
In this work I redesign a device used in the fiberglass sheet molding with roving. The device cuts the roving in pieces of approximately six or seven centimeters and lays them on the mold of the part to be made. Today these cutters have to be attached to the chuck of a regular handheld electric drill. The description of this task from an ergonomic standpoint
Publicado em: 2002
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5. The use of expert knowledge and data bank for drill bits selection / O uso de conhecimento especialista e base de dados na seleção de brocas de perfuração
A series of works developed using the concept of Distributed Intelligent Systems, creating agents of reasoning provided by experts in several areas of Petroleum, structured in a specific shell (Kards), has glimpsed a great potencial of this technology in Petroleum sector. ln the bit selection to drill oil well, the objective is to obtain a minimum metric cos
Publicado em: 1998
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6. Comparative study of vibration disease among operators of vibrating tools by factor analysis.
Principal component analysis was carried out to determine the interrelationships between subjective symptoms experienced by workers using various types of vibrating tools (brush saws (41), rock drills (39), chipping hammers (42) and chain saws (49)) and control groups (clerks (44), farmers (42)). The characteristics of the patterns of common factors extracte
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7. Hand-arm vibration syndrome among travertine workers: a follow up study.
In a six year follow up study of the handarm vibration syndrome, 62 stoneworkers operating hand held vibrating tools in 10 travertine quarries and mills were first investigated in 1985 and then in 1991. The frequency weighted acceleration of vibration from the rock drills and stone hammers used by the travertine workers exceeded 20 m/s2, indicating a hazardo