Tool geometry and machine-data audit (14 October 2026)

Six UKB original millimetre DXFs are bundled as sampled numerical outlines, with 415 mm and 835 mm single-piece stock entries for each tool. The sectional 800 mm sets are not interpreted as solid 800 mm tools.

All use the maker's Amada-system clamping. 22.616 requires holder 22.010, whose outline is not included. Machine/holder verification is still required. The actual rating stamped on the installed tooling takes precedence.

Reproducibility

data/brake_ukb_sections.json records source page, original CAD download URL, original DXF SHA-256 and coordinate translation for every tool. Coordinates are millimetres; punch origin is the lowest nose point, die origin is the V axis at shoulder height. The punch outline includes the 30 mm clamping tang; the working-height field excludes it.

dev/import_ukb_sections.py rebuilds this data from downloaded DXFs using ezdxf (developer only; the shipped add-in has no new dependencies). It removes only the explicit DASHDOT construction centreline, stitches all remaining LINE/ARC entities into one closed contour and checks dimensions. Arc chord error is at most 0.0025 mm; endpoint joins permit up to 0.001 mm (the 11.831 CAD has a 0.000120 mm endpoint discrepancy). No scaling or traced screenshot geometry is used. Runtime validation rejects self-intersecting contours.

Existing saved shop libraries are not overwritten. Use Library > Restore the starter entries to add the new stock entries, or import a reviewed library. Restoring starter entries replaces edited starter entries; duplicate any custom reground starter tool before restoring.

Machine data and limits

TRUMPF 7036 and 5130 dimensions were checked against the manufacturer's bending machines brochure, technical data p.53. The existing nominal entries match the base configurations: 7036 Y stroke 120 mm, open height 420 mm; 5130 Y stroke 215 mm, open height 505 mm. Optional stroke/open-height variants must be separate shop entries. Open height is table-to-beam; it is not the usable height after installed clamps.

The public data inspected does not specify the installed beam/holder/finger outlines, finger contact offset or programmed retraction for a particular shop setup. Retraction is a process setting, not the backgauge's maximum X travel. Since 16 October 2026 these gaps are filled with stated approximations instead of leaving the checks incomplete (see the next section): typical clamps and fingers per tooling system, a tool as long as the bend, a finger that stays at X. A shop's own outline or sizes always win.

Real CAD profiles improve the obstruction check and PDF side view, but the air-bend motion solver still assumes ideal shoulder contact; rounded die contact, elastic deformation and full 3D loading are not proven.

Outlines for the whole starter library (16 October 2026)

Every punch, die and machine of the starter library now has an outline, so the section check, the 3D view and the 3D check run with every tool. Each outline says where it comes from, and the checks list the ones that are not exact under Assumed.

Where an outline comes from

1. The entry's own section: picked in a Fusion sketch with Outline from sketch, maker CAD imported with Import from DXF, or points typed in. It always wins (the six UKB tools ship this way).
2. The outline bundled for a starter entry in data/brake_outlines.json, used while the entry keeps its catalogue values (the record stores them in match; an edited entry falls back to 3). Built by dev/build_brake_outlines.py from the research below.
3. Drawn from the entry's values (lib/formworks/brake_profiles.py): straight, acute, gooseneck and flattening punches; 1-V, acute, multi-V and hemming dies. A value the entry does not give takes a typical one, named in the outline's note. Offset tools and style Other need their own outline.

The upper beam is drawn from the punch shoulder (its clamping face) on the tang axis and set on each step's punch. European (Promecam) punches - AMADA AFH, UKB and Mate EPS alike - carry a 13 x 30 mm tang centred 13.5 mm behind the tip axis, and the AMADA holder is centred on the tip axis (a tang pocket each side); New Standard punches have a 20 mm tang 37 mm high on the tip axis; American punches a 0.5 x 0.5 in tang on the tip axis. A machine's own outline, then its upper clamp width/height and beam thickness, then the typical clamp of its tooling system are used, in that order. Library version 5 adds clamp_section_mm (from the punch shoulder); an older beam_section_mm (relative to the punch tip) is still used as entered.

Without a working length a tool is taken as long as the bend (sectioned tools), and without a gauge retraction the finger stays at X during the bend; both are listed under Assumed.

Research

Other makers' public CAD was used to cross-check: Mate Precision Technologies (945 press-brake DXFs; its European and WILA-style profiles match UKB's and WILA's) and the whole UKB catalogue (607 DXFs). An equivalent from another maker is used only where it matches the tool's published values; nowhere in the starter library does it replace the maker's own drawing.

Counts: punches 37 of 38 exact (the maker's drawing or CAD), 1 drawn from published dimensions; dies 70 of 87 exact, 15 drawn from published dimensions, 2 drawn from their entry values; machines: 5 clamps from the makers' drawings, 3 from equivalent clamps, all listed under Assumed.

Downloaded files, their URLs and SHA-256, the extraction scripts and the per-tool measurements are kept with the research (research/<family>.json, final_outlines.json); the bundle keeps each record's source and page in detail.