放電加工（EDM）以受控的電火花移除金屬，而非切削刀具，因此能觸及銑削與車削止步之處：熱處理後的淬硬鋼、碳化鎢、薄壁、真正的銳利內角與深窄槽。EDM逐特徵在圖面上指定，並與其周邊加工工序一併報價。
三種製程涵蓋大多數需求。線切割以移動的黃銅線貫穿工件切出輪廓與拔模角。放電加工（sinker EDM）以成形電極在淬硬鋼中燒出模穴與凹槽。細孔放電則加工高深徑比的深小徑導孔。
加工能力
- 淬硬鋼與碳化鎢的線切割輪廓與錐度加工
- 放電加工（sinker EDM）加工淬硬工裝中的模穴、凹槽與肋
- 細孔放電加工深小徑導孔
- 刀具無法觸及的銳利內角與深槽
- 熱處理後加工，無重新夾持變形
- 每筆訂單附尺寸檢驗報告
常用材料
EDM 適用於任何導電材料：淬硬狀態的工具鋼（D2、A2、H13）、不鏽鋼、鋁、黃銅、銅、碳化鎢與鈦。
| 材料 / 牌號 | 常見交貨狀態 | 切削性 | 適用情境 |
|---|---|---|---|
| 鋁合金 6061 | T6（固溶處理及時效） | 容易：切削性佳，切屑控制良好 | 支架、機殼、治具，從試作品到進入量產 |
| 鋁合金 7075 | T6 / T651 | 較難：刀具磨耗較大，需要剛性設定 | 高強度、重量敏感零件；不適合焊接 |
| 不鏽鋼 304 / 304L | 退火 | 加工硬化：轉速較低、正前角進給 | 一般耐腐蝕，食品與製程設備 |
| 不鏽鋼 316 / 316L | 退火 | 較304更韌：刀具磨耗更大 | 氯化物、船舶、醫療與製藥環境 |
| 碳鋼 1018 / 1045 | 軋延態 / 正常化 | 容易至中等；需防鏽保護 | 軸件、板件、焊接組裝件、工裝本體 |
| 黃銅 C360 | H02 半硬 | 極佳：高轉速、表面潔淨 | 接頭、襯套、連接器、裝飾零件 |
| 銅 C110 | 退火 / H02 | 黏性強：需銳利刀具與大前角 | 導電、匯流排、熱管理 |
| 鈦 Grade 5 (Ti-6Al-4V) | 出廠退火（mill annealed） | 困難：低轉速、熱控制、刀具磨耗 | 航太、醫療與輕量化高強度零件 |
| 工程塑膠（POM、PEEK、PA） | 押出 / 退火 | 容易至黏性：軟爪、銳利刀具 | 絕緣、低摩擦、耐化學與耐磨零件 |
表面處理
EDM 表面帶有細薄的再鑄層，工裝上通常保留放電原面，密封與成形特徵則予拋光；精修方式逐面在圖面上指定。
| 表面處理 | 作用 | 適用時機 |
|---|---|---|
| 原加工面 | 留有刀痕；Ra 通常 1.6–3.2 µm | 零件只需具備功能 |
| 珠擊處理 | 均勻霧面，遮蓋刀痕 | 陽極處理前的外觀件 |
| 陽極處理 Type II | 生成氧化膜；可選顏色 | 鋁件外觀加上溫和的耐蝕與耐磨性 |
| 硬陽極處理 Type III | 更厚、更硬的氧化膜 | 滑動或磨耗的鋁件表面 |
| 鉻酸鹽皮膜處理 | 薄型保護膜且維持導電性 | 鋁件電氣搭接或接地 |
| 化學鎳 | 均勻、堅硬、耐蝕的鍍層 | 耐磨加耐蝕，含孔內 |
| 鍍鋅 | 經濟的犧牲性防蝕保護 | 室內或有遮蔽環境的鋼件 |
| 粉體塗裝 | 厚實、耐用、裝飾性塗層 | 外觀即為要求時 |
| 鈍化處理 | 移除游離鐵並重建氧化膜 | 加工後的不鏽鋼零件 |
| 應力消除退火 / 熱處理 | 在切削前後釋放殘留應力 | 必須撐過加工的薄壁與緊公差零件 |
公差
線切割的輪廓精度通常維持 ±0.005–0.01 mm；sinker 與細孔放電的範圍略寬。更緊的數值於報價時逐圖審核確認。
| 圖面標註 | 需要什麼 | 對成本與交期的影響 |
|---|---|---|
| 一般：±0.25 mm / ±0.010 in | 標準刀具、尺寸抽檢 | 基準：不加價 |
| 標準：±0.13 mm / ±0.005 in | 機台狀況良好、首件檢查 | 小幅加價；最常見的報價預設值 |
| 緊：±0.025 mm / ±0.001 in | 研磨或鑽石刀具、溫控、三次元測量儀（CMM） | 階躍變化：切削更慢加上全數檢驗 |
| 精密：±0.013 mm / ±0.0005 in | 精修程序、量規、受控環境 | 加工主宰價格；常成為獨立工序 |
| 位置度 / 傾斜度（GD&T） | 基準控制，相關特徵一次設定完成 | 取決於基準跨多少次設定 |
| 表面粗糙度 Ra 0.8 µm 或更細 | 更細的步進、拋光或精修走刀 | 增加一個製程步驟，不只是加工時間 |
加工選項
- CNC machining is a subtractive manufacturing process.
- Finishing Options: Black Oxide, Electropolishing, ENP, Media Blasting, Nickel Plating, Passivation, Powder Coating, Tumble Polishing, Zinc Plating, Vibratory Tumbling
- EPX 82 is processed using Carbon DLS
- MUD is a type of mold that uses a standard injection molding frame.
- Different taper turning methods suit different jobs. Compound slides often handle short tapers, while CNC interpolation and taper attachments improve repeatability on longer parts
- G92 is used by programming one or more G92's right after the G76 threading cycle
- Estimates are provided through an auto-quoted method.
- EDM relies on a voltage and a thin wire
- Advanced machining processes like micro-machining and EDM are used to create small, precise mold cavities and cores
Surface Finish Reference
- The finish of MoldTech MT11010 is a fine matte texture.
- The finish of MoldTech MT11020 is a medium matte texture.
- The finish of MoldTech MT11030 is a coarse matte texture.
- SPI A-1 has a surface roughness of 0.012–0.025 µm.
- SPI B-2 has a finish of Medium semi-gloss.
- SPI B-2 has a surface roughness of 0.10–0.15 µm.
- SPI C-3 has a surface roughness of 0.63–0.70 µm.
- Super high gloss, polished with a Grade #3 (6000-grit) diamond buff to Ra 0.012–0.025 µm.
- Medium semi-gloss, finished with 400-grit paper to Ra 0.10–0.15 µm.
- Normal matte, polished with 320-grit stone to Ra 0.63–0.70 µm.
Tolerance Reference
- The tolerance with drawing for CNC Milling is as low as +/- 0.005 mm.
- FDM 3D printing offers a low-cost component with average accuracy and uses thermoplastics for 3D printing.
- Wire Cut EDM is highly accurate.
- The U6 H.E.A.T machine achieves tight tolerances.
- Die sinker EDM is capable of maintaining tight tolerances
- The shop needs to have CNC machines that can achieve a specific tolerance.
Industries We Serve
- antennas
- automotive
- CNC machined parts
- custom parts
- electronics
- medical diagnostic
- optical displays
- optical_systems
Material Reference
- ABS
- Austenitic Stainless Steel
- Carbon steel
- ceramic
- composites
- Copper - T2
- copper or graphite
- Hardened Materials
- High Impact Polystyrene
- Low-density polyethylene
- MDF
- metal
- Polybutylene Terephthalate
- SUS304
- thermoplastics
- thick metal sheets
- tungsten carbide
Ordering, Lead Times & MOQ
Custom CNC parts carry no forced MOQ; ordering from a single prototype piece is standard industry practice.
Instant-quote platforms publicly advertise prototype lead times of 1-3 business days.
Online RFQ is the industry-standard flow: upload a 3D model (STEP/STP/DWG/DXF), receive an instant quote or engineer review, then production, inspection, and delivery.
常見問題
什麼情況該用 EDM 而不是銑削？
當材料已淬硬、內角必須真正銳利（銑刀一定留圓角）、深窄槽，或傳統刀具無法經濟切削的碳化鎢時，使用 EDM。許多零件兩者並用：主體幾何用銑削，需要的特徵用 EDM。
EDM 只能加工淬硬金屬嗎？
不是。EDM 適用於任何導電材料，包括鋁、黃銅與銅。它只是在淬硬鋼與碳化鎢上最划算——傳統加工困難或不可行之處，EDM 較慢的移除率反而是更快的路徑。
EDM 工件報價需要哪些檔案？
請寄送3D CAD（STEP 或 IGES）加上2D圖面，載明材料與硬度狀態、哪些面採 EDM、放電後的表面粗糙度要求，以及穿線導孔的位置與直徑。報價前我們的工程師會確認可行性與加工與EDM的分工。
EDM 精度與 CNC 加工相比如何？
線切割的輪廓精度可與精密銑削相提並論——通常 ±0.005–0.01 mm——且因無需補償刀具半徑，可維持更銳利的內角。sinker EDM 部分取決於電極損耗，逐特徵以特定公差帶報價。
What is the minimum order quantity (MOQ)?
Prototypes from 1 pc. Low-volume production typical 50-500 pcs. No forced MOQ on custom parts; unit price drops with volume.
What is the typical lead time?
Industry benchmark: instant-quote platforms deliver prototypes in 1-3 business days. Our own production: prototypes 5-10 working days, including in-house QC and shipping. Production: 2-4 weeks depending on quantity/finishing. Express options exist; finishing adds days.
How do I get a quote and what information do you need?
3D files (STEP/IGS) + 2D drawing with tolerances. Material, quantity, finish, destination country. Quote turnaround: 24-48h typical.
What tolerance should I specify?
Specify tight tolerances only on critical features. Standard ±0.1 mm covers most features. Tighter tolerance = cost multiplier; apply selectively via drawing GD&T.
How is quality controlled?
First-article inspection in our own shop before the first production order. In-process checks. Final inspection report (dimensions) with shipment. Material certs (mill test reports) on request.
Is my design protected?
NDA before file exchange. Files used only for your production. No resale of custom designs.
Which material should I choose?
Function first: strength, weight, corrosion, cost. Common pairings: 6061 general, 304/316 corrosive env., PEEK medical. See materials guide pages.
Which surface finish do I need?
Anodizing for aluminum corrosion/wear/color. Passivation for stainless. Plating for conductivity/steel protection. Cosmetic vs functional distinction.
How do you ship and what terms?
DHL/FedEx/UPS express for samples and small batches. Air/sea freight for production volumes. Incoterms: EXW/FOB/DAP/DDP options.
Sources · 4
- emachineshop.comIndustry peer technical page
- rapiddirect.comIndustry peer technical page
- xometry.comIndustry peer technical page
- jlccnc.comIndustry peer technical page
Technical references cited for verifiability — not supplier recommendations. Browse the research library.
Capability commitments on this page are owner-confirmed (2026-09-21).