Jlcfa Aluminum Modeling

JLCFA Aluminum Modeling

Use this skill to turn enclosure requirements into structured modeling attributes and to check them against JLCFA aluminum alloy enclosure process limits.

Usage Preview

Example output from a BBClaw enclosure request: the skill reads a 3MF shell reference, turns the request into JLCFA-oriented design notes, structured JSON attributes, and a front-panel SVG preview.

Source Rules

Before giving manufacturability advice, detailed dimensions, tolerances, materials, finishes, marking, or machining-process choices, read references/jlcfa-standards.md.

Treat the reference as a design aid transcribed from JLCFA public pages. For order-critical or high-cost production decisions, tell the user to verify the current values on the linked JLCFA pages.

Workflow

1. Parse the user's enclosure intent into: base shell/profile, cover plates, faces, openings, screw/countersink holes, text/graphics, finish, machining process, tolerances, and export needs.
2. Keep dimensions in millimeters. State the coordinate frame you assume for each face, such as front-panel origin at lower-left, +X right, +Y up.
3. Prefer explicit, machine-readable attributes. If the user only gives natural language, infer conservative defaults and mark every assumption.
4. For built-in connector openings, map the user phrase to the standard-opening enum in the reference, and preserve the JLCFA Chinese label when the live designer label matters.
5. Check every feature against the JLCFA constraints in the reference: minimum cut width, opening-to-edge distance, rib reservations, available threaded holes, cover thickness, process choices, finish colors, and marking rules.
6. When a feature conflicts with constraints, propose the smallest practical adjustment and explain which rule drove it.
7. End with a compact "属性清单" plus a "待确认" list for missing dimensions, shell model/profile, quantity, color, surface quality, and production-critical tolerances.

Attribute Shape

Use this shape unless the target CAD/tool has its own schema:

{
  "project": {
    "name": "string",
    "vendor": "JLCFA",
    "unit": "mm",
    "coordinateSystem": "face-local origins are declared per feature"
  },
  "body": {
    "type": "extruded_aluminum_shell",
    "profileId": "unknown-or-user-provided",
    "material": "6063-T5",
    "lengthMm": null,
    "finish": {
      "process": "sandblast_anodize",
      "color": "natural|black|sky_blue|champagne|red|lake_blue|rose_pink|emerald_green|deep_space_gray"
    },
    "machining": {
      "process": "laser_cut|cnc|laser_plus_cnc",
      "toleranceGrade": "GB/T 1804-2000 m"
    }
  },
  "covers": [
    {
      "face": "front|rear|top|bottom|left|right",
      "material": "5052",
      "thicknessMm": 1.5,
      "machiningProcess": "laser_cut|laser_plus_cnc|cnc"
    }
  ],
  "features": [
    {
      "id": "feature-1",
      "face": "front",
      "type": "standard_opening|custom_opening|round_hole|slot|threaded_hole|countersunk_hole|laser_mark|uv_print",
      "shape": "circle|rectangle|rounded_slot|custom_svg|text",
      "centerMm": [0, 0],
      "sizeMm": [0, 0],
      "diameterMm": null,
      "rotationDeg": 0,
      "process": "laser_cut|cnc|laser_mark|uv_print",
      "standardOpening": {
        "kind": "standard_round_through_hole|standard_round_tapered_countersink|ethernet_rj45|ethernet_rj45_led|usb_type_c_male|usb_type_c_female|usb_rect_usb_port|usb_micro_b_female|usb_mini_b_female|dsub_vga_hdmi_port|dsub_vga_ddmr00pm_d|dsub_vga_dvi_female|dsub_vga_hdmi_female|dsub_db9|dc_power_connector_variant_a|dc_power_connector_variant_b|custom_library_other",
        "label": null,
        "catalogGroup": "standard_round_hole|ethernet_connector|usb_connector|vga_dsub_connector|dc_power_connector|other",
        "designerClearanceMm": 0.2
      },
      "constraintsChecked": [],
      "notes": []
    }
  ],
  "quality": {
    "appearanceLevel": "general|strict|extreme",
    "toleranceGrade": "m"
  },
  "assumptions": [],
  "openQuestions": []
}

Output Style

Use Chinese when the user writes Chinese. Keep the final result practical: a short explanation, a JSON-like attribute block, conflicts/fixes, and open questions. Do not claim that JLCFA will accept a model unless the current order page or an engineer has confirmed it.