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In manufacturing industry, nesting refers to the process of laying out cutting patterns to minimize the raw material waste. [1] Examples include manufacturing parts from flat raw material such as sheet metal, glass sheets, cloth rolls, cutting parts from steel bars, etc. Such process can also be applied to additive manufacturing, such as 3D ...
A jigsaw is a reciprocating saw that can cut irregular curves, such as stenciled designs, in wood, metal, or other materials. Jigsaws first emerged in the 19th century [1] and employed a treadle to operate the blade, which was thin and under tension, being secured at both ends to an oscillating frame. This kind of saw is now usually called a ...
One of the main uses of choppers was to cut through the meat and skins of hunted animals to obtain food, hide, and fur. The sharpness of the tool improved the overall process. Ridges and cut marks on bones can prove their use for the task. Also, these tools were used on plants, such as digging up roots and shaving and chopping wood. [6]
A single-cut file has one set of parallel teeth while a cross-cut or double-cut file has a second set of cuts forming diamond shaped cutting surfaces. [1] In Swiss-pattern files the teeth are cut at a shallower angle, and are graded by number, with a number 1 file being coarser than a number 2, etc.
Cutting-stock problems can be classified in several ways. [1] One way is the dimensionality of the cutting: the above example illustrates a one-dimensional (1D) problem; other industrial applications of 1D occur when cutting pipes, cables, and steel bars. Two-dimensional (2D) problems are encountered in furniture, clothing and glass production.
Quartz countertops have skyrocketed in popularity over the last decade, but new research suggests the material poses a deadly health risk to the workers who make it.
On "America's Got Talent," a Bulgarian couple got the audience and the judges on their feet after a dangerous and impressive routine: a man balanced his wife -- who in a giant, spinning ...
Additionally, variants where the shapes are circular or even irregular have been studied. In the latter case, it is referred to as irregular strip packing. Dimension: When not mentioned differently, the strip packing problem is a 2-dimensional problem. However, it also has been studied in three or even more dimensions.