[family-assembly] double_wedge_clamp: JW Winco GN 920.1 steel wedge clamp

[sunzhenchuan007]

Family

• Family: double_wedge_clamp
• Closes [family-assembly] double_wedge_clamp #59
• A static four-solid JW Winco GN 920.1 double-wedge clamp assembly with opposed GL, GA, or RF jaws, a centered wedge, and a low-head screw.

Reference

The official product page, engineering drawing, product photo, and seven-row metric table are documented in Issue #59.

Generated — benchmark views

Difficulty overview — easy / medium / hard

Extremes — smallest and largest sampled instances

Independent components, assembly highlights, and exploded layout

preview_parts.png independently shows four standard benchmark views for every distinct physical geometry:

• GL jaw representative, quantity=2, Assembly names jaw_left / jaw_right
• GA jaw representative, quantity=2, including both M4 attachment holes
• RF left and right jaws separately because the simplified mirrored texture phase makes them non-interchangeable geometries
• center_wedge, including the integral T rails and screw clearance/recess
• screw, including the low head and simplified hex recess

After those part rows, it shows three four-view assembly-highlight rows:

• jaw_left and jaw_right in distinct colors, with center and screw translucent
• center_wedge highlighted, with jaws and screw translucent
• screw highlighted, with jaws and center translucent

The final four-view row is an explanatory exploded layout: jaws separate along -X/+X, while the center wedge and screw separate along +Z; red arrows show those directions. The offsets are visualization-only proportion choices. They are not catalog dimensions or a claimed manufacturer disassembly sequence.

How it is parameterized

catalog_row selects one complete GN 920.1 metric-table row:
M8-21, M8-25, M8-32, M8-40, M8-50, M12-40, or M12-50.
refine() copies the selected row's coupled d, b, h1, h2, h3,
screw_projection, m, force, and torque values without mixing rows.

jaw_type selects the published GL, GA, or RF form. GA creates two nominal
M4 × 5 mm blind attachment holes per jaw at catalog spacing m; RF uses a
deterministic simplified crossed-groove texture. jaw_span remains within the
catalog a interval for the selected row and type.

The static cq.Assembly has stable component names:

• jaw_left
• jaw_right
• center_wedge
• screw

family.json declares "solids": 4, matching those four independent bodies.
The center is an integral trapezoidal wedge with horizontal upper/lower faces.
Its opposed contact faces share the jaw slopes and carry continuous, integral
T-shaped guide rails; matching jaw slots are open through both ends.
Undimensioned wedge, guide, clearance, screw-recess, and RF texture geometry is
explicitly documented as proportion in NOTES.md.

Verification

uv run --active --no-sync bench2 validate double_wedge_clamp:

Gate	Result
easy	4/4
medium	4/4
hard	4/4
catalog_row coverage	7/7
jaw_type coverage	3/3
geometry novelty	10/12
solids	4 non-degenerate solids in every instance

Independent component checks used the M12-50 maximum envelope and confirmed:

• one non-degenerate solid per jaw, center wedge, and screw
• GL and GA left/right jaws coincide after a 180-degree rigid rotation
• RF left/right variants remain non-degenerate and are previewed separately
• T slots are open through both the jaw top and bottom limits
• Assembly children are exactly jaw_left, jaw_right, center_wedge, screw
• all six component-pair intersection volumes are zero
• GA removed volume matches four Ø4 × 5 mm cylinders across the two jaws
• RF texture remains non-degenerate

Checklist

• uv run bench2 validate double_wedge_clamp passes locally
• uv run bench2 preview double_wedge_clamp was run; all standard renders were inspected
• preview_parts.png gives every distinct physical geometry four independent benchmark views
• assembly-highlight rows identify jaws, center wedge, and screw against translucent spatial references
• the explanatory exploded row includes separation arrows and does not claim a catalog-defined sequence
• family.json declares four solids and four matching components
• every PARAM_SPEC.source and check() rule cites the catalog or honestly says proportion
• PR touches only designs/double_wedge_clamp/
• commits are DCO-signed
• AI-assisted; the human contributor reviewed the assembly and requested the final geometry refinements

Sources used

• JW Winco GN 920.1 product page
• JW Winco GN 920.1 official catalog PDF
• proportion for dimensions not printed in the official drawing/table, as itemized in NOTES.md

Deliberate simplifications

• Static assembly only; no spring behavior, mates, force, or torque simulation
• Hidden return spring, thread helices, workpieces, end stop, pull-down plates, and user attachment jaws omitted
• RF tooth form and DIN 7984 recess details simplified because the catalog does not dimension them

[github-actions]

Welcome, and thanks for the family PR! Three things that answer most questions:

• No checks running? A maintainer must click Approve workflows once for your first PR — pending, not ignored.
• Red gate? The message tells you the fix: click Details, or read the bench2 validate report comment posted after each run. Reproduce locally with uv sync && uv run bench2 validate <family> (debug help).
• Scope: designs/<family>/ holds only the package files (reference drawings/photos go in the family issue), and the PR checklist must be fully ticked. Not done yet? Mark the PR as a Draft.

中文:红 ✗ 点 Details 或看 validate 报告评论;本地 uv run bench2 validate <family> 复现;参考图放 issue 不放 PR;没做完用 Draft。入门 → GETTING_STARTED.zh

[github-actions]

bench2 validate

double_wedge_clamp

  ✓ family.json: keys + base_plane valid
  ✓ pieces: build(9 params) + PARAM_SPEC + check present
  ✓ PARAM_SPEC: 12 params, all entries complete
  ✓ easy: 4/4 seeds sample+check+build+execute clean
  ✓ medium: 4/4 seeds sample+check+build+execute clean
  ✓ hard: 4/4 seeds sample+check+build+execute clean
  ✓ coverage: catalog_row reaches all 7 declared values (standard table fully covered)
  ✓ coverage: jaw_type reaches all 3 declared values (standard table fully covered)
  ✓ difficulty separation: difficulties produce distinct programs
  ✓ geometry novelty: 10/12 unique shapes (17% duplicate)
  ✓ solids: every instance non-degenerate, 4 solid(s) each (declares solids=4)
PASS — designs/double_wedge_clamp

Previews: the previews artifact on this run.

[HaozheZhang6]

would add ref img from issue