用3D打印低成本制作可弹奏吉他，材料与结构设计影响音准。
Production and Manufacturing of 3D Printed Acoustic Guitars
- 分段打印吉他身，通过卡扣拼接加少量胶水组装。
- 尼龙弦调音后能奏出准确音高，但低音弦频率偏差大。
- 适合关注可持续乐器、音乐教育公平的开发者与爱好者。
本研究探讨了利用3D打印技术制造经济实惠且功能完整的原声吉他可行性，重点在于实现具有合适音色表现的结构设计。研究与威廉·施伊瑟合作，选用弦张力较低的古典吉他模型，采用聚乳酸（PLA）材料打印原型吉他。受限于普鲁萨马克4打印机的打印平台尺寸，吉他主体被分割为多个部分，通过压配合公差连接，并辅以少量氰基丙烯酸酯胶粘剂固定。使用Fusion 360进行CAD建模，确保压配合连接与整体装配的尺寸精度。组装完成后，吉他安装尼龙弦，并通过Audacity软件录制音频，与标准参考值对比频率与音符。结果显示低音弦频率存在较大偏差，可能源于打印材料特性。尽管频率有差异，所有琴弦经调音后仍能达到准确音高，表明使用PLA和现代制造工艺可实现低成本、可演奏的原声吉他，尽管存在固有挑战。未来研究可探索更优塑料材料以提升频率匹配性。该方法有望扩大优质乐器获取渠道，减少对濒危音木材的依赖，推动可持续乐器生产与音乐普及，尤其为资源匮乏社区提供机会。关键词：制琴学、光固化、3D打印、吉他制作
原文摘要 · Abstract (English)
This research investigates the feasibility of producing affordable, functional acoustic guitars using 3D printing, with a focus on producing structural designs with proper tonal performance. Conducted in collaboration with William Schiesser, the study uses a classical guitar model, chosen for its lower string tension, to evaluate the tonal characteristics of a 3D-printed prototype made from polylactic acid (PLA). Due to the build plate size constraints of the Prusa Mark 4 printer, the guitar body was divided into multiple sections joined with press-fit tolerances and minimal cyanoacrylate adhesive. CAD modeling in Fusion 360 ensured dimensional accuracy in press-fit connections and the overall assembly. Following assembly, the guitar was strung with nylon strings and tested using Audacity software to compare recorded frequencies and notes with standard reference values. Results showed large deviations in lower string frequencies, likely caused by the material choice utilized in printing. Accurate pitches were reached with all strings despite frequency differences through tuning, demonstrating that PLA and modern manufacturing methods can produce affordable, playable acoustic guitars despite inevitable challenges. Further research may investigate alternative plastics for superior frequency matching. This approach holds significant potential for expanding access to quality instruments while reducing reliance on endangered tonewoods, thereby encouraging both sustainable instrument production and increased musical participation. This also creates opportunities for disadvantaged communities where access to musical instruments remains a challenge. Keywords: Luthiery, Stereolithography, 3D-Print, Guitar Making
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