Laser sawing of diamonds is beginning to revolutionize the diamond-cutting industry. Not only does the laser saw offer savings in time and money, but it also enables the cutting of material virtually unworkable by conventional methods and makes available an almost limitless assortment of fancy shapes. This article describes the components and operation of the laser saw, as well as the situation...

Algorithms for shape offsetting are of great importance in computer-aided design (CAD), computer-aided manufacturing (CAM), the numerical control (NC) of machines, computer graphics and related fields. The need for offset shapes arises in applications such as the numerical control of sawing machines or milling machines in the car industry. The problem of shape offsetting can be formulated as fo...

With respect to the treatment of this complaint, I have little or nothing to advance: nor indeed is it to be expected we should have made much progress in the cure of a disease, which has hitherto hardly had a place, or a name in medical books... Opium taken at bed-time will prevent the attacks at night. I know one who set himself a task of sawing wood for half an hour every day, and was nearly...

Instituto de Tecnología de Productos Forestales, Facultad de Ciencias Forestales y de Recursos Naturales, Universidad Austral de Chile, Valdivia. Chile. aguilera@ uach.cl Instituto de Acústica, Facultad de Ciencias de la Ingeniería, Universidad Austral de Chile, Valdivia. Chile. [email protected] Corresponding author: [email protected] Received: 24.05.2010. Accepted: 26.08. 2010. SOUND PRESSURE AS...

One of the most crucial factors involved in the optimum design and cost estimation of rock sawing process is the rock abrasivity that could result in a significant cost increase. Various methods including direct and indirect tests have been introduced in order to measure rock abrasivity. The Schimazek’s F-abrasiveness factor ( ) is one of the most common indices to assess rock abrasivity.  is t...

In rural, isolated areas, sawmills are often equipped with one or more small-capacity hand-fed band saws. Even in this situation, the productivity of saw must be viewed through factors that influence it, namely characteristics logs and optimization stages activities carried out. Therefore, time consumption, structure working recovery rate sawing into lumber provide important information for use...