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LTGOzLTGOz/solidworks-agent-skill/skills/sw-dfm-proto/SKILL.md

sw-dfm-proto

Skill1 starsChanged 2 months agoMITView on GitHub

3D 打印手板结构设计 DFM 分支技能(EVT/原型验证约束):FDM/SLA/SLS/MJF 的最小壁厚/最小特征/悬空角/ 配合间隙/孔径/螺纹/排液孔/拆件打印的量化规则库 + dfm_check.py 自动体检。当用户提到 3D 打印、手板、 样件、原型、FDM、SLA、打印验证、EVT、打印支撑、悬空、层纹,或要求"打印前检查模型"、"手板能不能打"时使用。 与母技能 solidworks-automation(SolidWorks 配方建模)配合:规则输出作为建模配方参数约束。

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SKILL.md

sw-dfm-proto · 3D 打印手板结构设计 DFM 分支

角色:手板/原型结构审查。目标是一次打印成功:打印前把模型参数过一遍规则库,消灭层纹断裂、配合卡死、大量支撑三大翻车点。原型件结构逻辑复刻量产件(同拔模/同圆角/同卡扣),验证通过即可过渡开模(量产约束见姊妹分支 sw-dfm-injection)。

知识来源

  • 《产品结构设计规范》§九 及通用条目
  • 嘉立创 3D 打印设计规范公开数值惯例(配合间隙/公差/排液孔/最小螺纹等,数值引用并注明来源)
  • 规则库:rules/dfm_proto.json(14 条规则)

工作流

  1. 打印前体检:python dfm_check.py --design design.json --process proto(模板用 --template)
  2. 建模约束:规则作为 solidworks-automation 配方参数下限——壁厚 ≥1.2、特征 ≥0.8、FDM 配合间隙 ≥0.5、掏空件排液孔 ≥2.5
  3. 配方级 lint:python dfm_check.py --recipe my.json --process proto——对 sw_bridge 配方做有限识别(首特征壁厚提示/圆角下限/小孔提示)
  4. 出单:打印取向建议(减少 >45° 悬空)、拆件打印方案

核心规则速查(完整版见规则库 JSON)

结构量化规则关键原因
壁厚≥1.2mm,厚区挖空(≤3mm)防翘曲/层间剥离
最小特征≥0.8mmFDM 挤出宽度限制
悬空角>45° 加支撑;设计期减少支撑面免支撑/省后处理
FDM 配合间隙≥0.5mm(SLA/MJF 可 0.2)层厚误差防卡死
活动件间隙0.5–1.0mm活动顺畅
最小孔径FDM ≈2mm;打印螺纹最小 M6(小螺纹走自攻+底孔)孔径收缩
排液孔掏空件 ≥2.5mm粉末/树脂排出
卡扣悬臂 0.8–1.2mm,根部大圆角防层纹断裂
螺丝柱必须连壳体,独立 Boss 打印易断强度

与注塑分支的双工艺取舍(重要)

同一零件注塑与 FDM 的规则可能冲突,典型是装配间隙:注塑要求 0.15–0.25mm,FDM 要求 ≥0.5mm。 处理原则:结构逻辑一套,功能间隙分档——量产件按注塑间隙设计;手板打印时在配合面局部放大间隙 (或打印后手工修配),并在参数表里注明"手板特调",勿为打印改量产结构。

边界(诚实声明)

  • 厂商具体工艺能力(材料/精度/最小特征)以下单页实时参数为准,规则库数值是通用惯例
  • 本分支做参数级检查,不做几何级分析(悬空面检测可用 text-to-cad 生态的 dfam-check 技能对 STL 复查)

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