Joinery

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The joinery is tailor-made scribing, processing, matching and marking of cut and round wood for structures, components and integrated parts in carpentry .

In the broadest sense, this includes roof design and foundation . A distinction is made between traditional, graphic, arithmetic and computer-aided joinery. All procedures build on one another and are often combined in practice. The wood is worked out with carpentry tools , large hand machines, stationary carpentry machines or CNC-controlled joinery lines , mostly on a joinery station or a joinery hall of the carpentry , but it can also be done on site at the construction site .

Traditional joinery

In traditional joinery , all dimensions and angles are determined and marked out by placing the wood directly on a cord floor , also known as an allowance or elevation (a simplified drawing on a scale of 1: 1). Here is also the advantage: you can use round, crooked or twisted wood. Be torn off and notches, pins , pin holes, the position of axes slopes, walls, and built-in parts by scribe mark (traditional characters and symbols such as collar mark section, wall or edge crack, medium or Achsriss or faulty tear). After trimming the finished component in the flies is folded tentatively checked for dimensional stability, drilled (drill the holes for wood nails at tenon joints) and by attaching the Abbundzeichen (Abnummern or sharpening) prepared for leveling.

Drawing joinery

In the case of graphical joinery , the cord base is scaled down (1:10 or 1: 5). All dimensions required for marking are measured and extrapolated, angles are taken over with a bevel or template and transferred to the wood. As a check, the finished pieces of wood are put together as a test and the resulting measurements (for example the total length or height) are taken and compared with the drawing.

The arithmetic joinery is based on the fact that everything you draw can also be calculated. All dimensions and angles are calculated, checked using a true-to-scale drawing and transferred to the wood using marking aids ( e.g. alpha angles ). Machine angles and cutting depths can also be calculated.

Computer-aided beam

In computer-aided beam processing , the construction of components and assemblies is carried out in special CAD / CAM programs, the beam processing programs . The result is output as a printout, in which all dimensions and angles are listed, the marking and finishing is carried out as with the mathematical beam.

The data can also be output in machine-readable form. Further processing then takes place in CNC systems, beam processing lines or beam processing machines .

Web links

• https://baubeaver.de/abbund/

Individual evidence

1. ^ Willi Mönck: Carpentry . VEB Verlag für Bauwesen, Berlin 1987, p. 427 .