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Infinity∞CNC Digital Bevel Head
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Weld preparation is on the critical path so customers have always wanted the enormous time and cost saving in
fabrication with fully prepared accurate plate parts. It is Y and K bevels that offer the potential to halve welding
costs and assembly labour by removing an entire step in the fabrication process. However bevelling as a process is not
simple. Machines, torches and programming systems are still tested by this type of application which is machining, not
rough flame cutting. For many reasons, it just has not worked or has been too expensive or too complex. Where accuracy
is required, there are varied inherent problems such as torch height control, special logic for loops, corners, adjustment
to kerf, feedrate and more. A small error in the head position, horizontally or vertically means a big shift in the
position of the small land formed in a K bevels. Many weld preparations are critically dependent on the angle of the
'land', which is often not 90 degrees.
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To complicate matters further, there are multiple ways in which a drawing can be defined. Thus a simple rectangle is
not enough. When bevelled you have to know if you are looking at the top, the bottom, half way through or even the top
on one edge and the bottom on another, with the biggest or smallest rectangle approach. In many cases, the NC programmer
has had to tackle problems best left to a welding engineer. If not calculated correctly, you may have a beautiful bevel
but on a part which is too big or too small and does not fit.
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