Nesting

 

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  • Nesting


    Nesting is used to define the process type that conducts a cutting plan. For rectangular cuts, the most usual definition is to say optimization calculation.

    The cutting plans can be done manually or with the help of cutting plan optimizers and can consider various materials, like paper, cardboard, glass, wood, stainless steel, metallic composites (ACM), acrylic, marble, granite, polystyrene, cork, foam, general finishing, textiles, leather and porcelain, et cetera.

    These materials for cutting can be in the following forms:

    • In a natural form (e.g.: tree trunks for transforming into planks);
    • In sheets (or boards, depending on the type of material, however with the same characteristics in terms of width and height);
    • In blocks, in the cases in which the thickness of the material must be considered for three dimensional optimizationIn coils;
    • In bars, profiles and other linear materials, in which only the length of the material is required for the cutting plan elaboration.

    There are two types to consider in the specific case of sheet cutting:

    Rectangular cuts: when all the angles of the parts to be cut form 90°. When positioned, these parts will always be parallel or perpendicular to the sides of the sheets.

    Irregular cuts: include both the cuts with different angles of 90°, like trapezium and triangles, and also the curves (circles and ellipses) and free creation mixes. There are various technologies available to make these types of cuts, like lasers, oxycut, plasma, ultrasound, water jets and electrical discharges, among others.

    Rectangular cuts have basic technology:

    Cutting plan or cutting diagram – is the design with the indication of the cut lines of the parts, waste and remnants. Other names: layout diagram, cut layout, diagram, assembly and scheme.

    Sheet – also called raw material, which can furthermore have different names depending on the material: panel, board, plate or blank. In the academic field it is normally called object.

     Part – can also be called piece, item or even bit.

     Project – list of parts with quantities and measurements to be cut of the available sheets, even being of different materials. Order is another name.

     Remnant: parts that are left over and whose dimensions may make their use in future cuts feasible. Other names: fragment and ONcut.

    Scrap: the leftover parts whose dimensions make them impossible to use
    in the future. Other names: waste and rest.

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