Blog
Notes from the hall
Written for the engineer who has to specify a weldment and then live with it. Every figure here comes from the same certificates and machine list as the rest of the site, and where something is not published we say so instead of estimating it.
All notes
· 7 min read
600 mm or module 13: the limits of hobbing a gear in-house
The KNC 60 hobs gears up to 600 mm across the tips, from module 2 to 13, up to 110 mm wide and with 5 to 120 teeth. Each limit decides whether a gear is cut beside the frame it drives or goes to a second supplier.
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· 6 min read
Weldment height by structure type: 2.8 m, 3.4 m, 3.9 m or 6.0 m
A typical enclosure stands 2.8 m tall and a typical platform stands 6.0 m. The height class of a weldment decides how it is blasted, painted, machined and loaded.
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· 6 min read
Dimensional inspection of welded frames: 1.5 to 13.6 m against the drawing
The measuring arm checks a welded frame after the last weld cools and before the blast chamber. The drawing's tolerance class sets the limits, and the report shows every deviation.
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· 6 min read
Laser cutting steel plate: what 2 000 x 4 000 mm and 20 mm decide
A part whose flat outline fits 2 000 x 4 000 mm, in plate up to 20 mm, comes off the TruLaser 3040 in one piece. Longer parts are split in the nest and welded back at a joint the drawing allows.
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· 7 min read
Blasting before paint: what happens in the 8 000 x 5 000 x 3 000 mm chamber
A welded frame follows its route from the fitting bay into the 8 000 x 5 000 x 3 000 mm blast chamber. Masking, surface checks and timing there decide how long the paint lasts.
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· 4 min read
What EXC2 to EN 1090-2 actually requires from a supplier
Execution class is not a badge. It is a list of things that have to exist in the workshop before your weld is made, and a separate list of things it does not mean.
Read· 6 min read
75 to 80 °C in a 7 900 x 5 000 x 4 890 mm booth: how the paint is cured
A welded frame is blasted in an 8 000 x 5 000 x 3 000 mm chamber, then sprayed and cured at 75 to 80 °C in a 7 900 x 5 000 x 4 890 mm booth. What that means for part size, fitted components and the coating report.
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· 3 min read
EN ISO 5817 quality level C, and what it means for your seams
Level C is what EXC2 asks for. It is not a grade of steel, not a coating class, and not an instruction to make the weld look nice. It is a table of limits.
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· 3 min read
What a drawing needs before we can quote it
Most quotations are slow because the drawing is missing one of six things. None of them is hard to supply, and all of them cost more to ask for later.
Read· 6 min read
EN 10204 3.1: following a plate from the mill to the finished weldment
Cutting, blasting and paint each remove or cover the heat number on a steel plate. This is how the inspection certificate stays matched to every part of a weldment, and when to ask for it.
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· 3 min read
Designing a welded frame for distortion control
Weld metal shrinks as it cools. Everything a frame does afterwards follows from that, and most of it is decided at the drawing stage rather than in the shop.
Read· 7 min read
6 200 x 3 000 x 1 600 mm of travel: machining a frame after it is welded
Weld shrinkage moves every face near a seam, so bearing seats and mounting faces are cut after welding. Travel, table load and spindle size decide which boring mill takes your frame.
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