Precision Metal Stamping for High-Volume Parts高产量精密金属冲压件

A progressive die is a single tool that holds a sequence of stations in one die set. Coiled or strip stock feeds through it one pitch at a time, and every stroke of the press performs a different operation at each station simultaneously — pierce here, form there, bend further along, cut off at the end. One finished part drops off the strip on every stroke, which is why progressive die stamping reaches cycle times no other metal forming process can match at volume. Compared with a compound die that finishes one part per stroke in a single station, progressive dies trade higher tooling cost for far higher output and far more complex geometry. Our full progressive die stamping guide covers the station-by-station mechanics in depth.

连续模是一副模具内按顺序排列多个工位的单一模具。卷料或条料按一个步距逐步送进，压力机每冲一次，各工位同时完成不同工序——这里冲孔、那里成形、再往后折弯、末端切断落料。压力机每走一次就掉下一件成品，这正是连续模冲压在大批量下能达到其他金属成形工艺无法企及节拍的原因。与单工位每冲一次完成一件零件的复合模相比，连续模以更高的模具投入换来高得多的产能和复杂得多的几何形状。完整机理见我们的连续模冲压指南。

The progressive die stamping process runs five operations in a fixed sequence. Stock is levelled and fed to a stop; pilot holes are pierced first so every later station registers off them instead of off the strip edge; the profile is notched and blanked; features are formed, coined, embossed or tapped in-die; and the finished part is cut free from the carrier strip at the final station. Because registration is carried by pilot holes rather than by accumulated strip position, precision progressive dies hold ±0.02 mm on pierced hole patterns across production runs of a million strokes or more. Features that genuinely need ±0.01 mm — a threaded bore, a sealing face, a bearing seat — are still better produced afterwards on a machining centre, and this comparison of metal stamping and CNC machining explains where to draw that line.

连续模冲压工序按固定顺序完成五步：材料校平后送到定位挡块；先冲导正孔，后续每个工位都以导正孔定位而非条料边缘；再切缺口与落外形；特征在模内完成成形、压印、压凸或攻牙；最后工位把成品从载体上切下。由于定位靠导正孔而不是条料的累积位置，精密连续模在一百万冲次以上的量产中，冲孔位置仍能守住 ±0.02mm。真正需要 ±0.01mm 的特征——螺纹孔、密封面、轴承位——事后上加工中心做更合适，这篇金属冲压与 CNC 加工的对比讲清了这条分界线该划在哪里。

Progressive stamping die design follows four rules that prevent most production problems. Keep hole diameter at or above material thickness, and never closer than one thickness to an edge or a bend line, or the punch deflects and the pierced slug pulls the edge out of tolerance. Specify one burr direction on the drawing, because reversing the burr means reversing the tool. Put pilot holes in the scrap area rather than on the finished part, so registration leaves no mark. Standardise every bend radius in the strip to a single value, which lets one punch profile serve all stations. Where stamped geometry also needs a machined feature, our sheet metal fabrication line and CNC cells run in the same plant, so the hybrid route stays under one quality system — the structure that matters most for automotive programs documented under IATF 16949.

连续模设计遵循四条规则，能规避大部分量产问题：孔径不小于料厚，且离任何边缘或折弯线不小于一个料厚，否则凸模偏摆、冲下的废料会把边缘拉出公差；图纸上统一标注一个毛刺方向，因为换毛刺方向意味着换刀；导正孔放在废料区而不是成品面上，定位就不会留下痕迹；整条料带的折弯半径统一成一个值，所有工位就能共用同一种凸模形状。当冲压几何还需要机加工特征时，我们的钣金加工产线与 CNC 单元在同一厂区内，混合工艺仍在同一个质量体系下——这一点对按 IATF 16949 建档的汽车项目尤其重要。

Tooling pays back on volume, not on part price. A progressive die costs far more upfront than laser cutting, while CNC machining carries no tooling cost at all, so prototypes and low quantities should stay on those routes; our low-volume CNC machining guide covers exactly that decision. Above roughly a few thousand pieces depending on part size, stamped unit price drops far below either alternative, dies routinely pass one million strokes between regrinds, and secondary operations such as plating, heat treatment and assembly can be built into the same quote. Send a STEP file together with your annual volume and we reply with a free DFM review and firm pricing within 24 hours.

模具是在产量上回本，而不是在单价上省。连续模的开模投入远高于激光切割，而 CNC 加工根本没有模具费用，因此打样与小批量应留在这些工艺上，这篇小批量 CNC 加工指南讲的就是这个取舍。按零件大小，大约在几千件以上，冲压的单件价格会远低于上述两种方案；模具两次修磨之间通常走得一百万冲次以上，电镀、热处理与组装等后工序也能并入同一份报价。把 STEP 文件和年用量发过来，含免费 DFM 评审，24 小时内出正式报价。

When the part outgrows the carrier, transfer tooling takes over. A progressive die has to keep the part attached to the strip until the final cutoff station, which caps how deep it can be drawn and rules out features on opposite faces. Once a drawing calls for a draw deeper than roughly four times material thickness, or for a feature that needs the part re-oriented mid-process, the honest answer is a transfer die stamping line rather than a progressive die stretched past what the strip can carry.

当零件超出料带的承载范围，就该交给搬送模。连续模必须让零件一直连在载体上、直到最后切断工位，这既限制了拉伸深度，也让对面特征无法实现。一旦图纸要求超过材料厚度约四倍的拉伸，或者某个特征需要在工序中翻转零件，诚实的答案是改用搬送模冲压产线，而不是把连续模硬撑到料带承受不了的程度。

High speed stamping is the point where metal stamping stops behaving like a forming operation and starts behaving like a production line. The strip feeds continuously, the press runs above roughly 200 strokes per minute and, on small connector and lead-frame work, up to 1,500 SPM — a single eight-hour shift then produces between 96,000 and 720,000 parts. At that tempo the die, not the machine hour, sets the unit cost. That is why we quote high speed stamping programmes with regrind intervals, spare punch sets and misfeed detection written into the plan instead of leaving them as shop-floor preferences.

高速冲压是金属冲压从成形工序转变为产线逻辑的临界点：料带连续送进，压力机行程速度超过约 200 次/分，小型连接器与引线框架类零件可达 1,500 次/分——单班八小时的产出在 96,000 到 720,000 件之间。到了这个节奏，决定单件成本的是模具而不是机时。所以我们报高速冲压方案时，会把修磨间隔、备用冲头组与误送检测一并写进方案，而不是留给车间临时决定。

What stroke rate your part can actually hold depends on material, thickness and the die's ability to clear scrap. Thin, soft, narrow strip runs fast; thick, springy or wide strip does not:

零件实际能跑多快，取决于材料、料厚以及模具排废的能力。薄、软、窄的料带跑得快，厚、回弹大或宽的料带跑不动：

• Connector terminals and contacts in 0.10–0.30 mm phosphor bronze or brass: 600–1,500 SPM, 3–8 million strokes between regrinds.连接器端子与触点，磷青铜或黄铜 0.10–0.30 mm：600–1,500 次/分，修磨间隔 300–800 万冲次。
• Lead frames and EMI shields in 0.10–0.40 mm copper alloy or stainless: 400–900 SPM, 2–6 million strokes between regrinds.引线框架与 EMI 屏蔽罩，铜合金或不锈钢 0.10–0.40 mm：400–900 次/分，修磨间隔 200–600 万冲次。
• Small brackets, clips and springs in 0.30–1.00 mm stainless or carbon steel: 200–500 SPM, 1–4 million strokes between regrinds.小型支架、卡箍与弹片，不锈钢或碳钢 0.30–1.00 mm：200–500 次/分，修磨间隔 100–400 万冲次。

A complete high speed stamping system is quoted as one package: a short-stroke press with thermal ram compensation, a servo roll feed with pilot release holding pitch within a few hundredths of a millimetre, carbide punches and die buttons, and in-die force monitoring that shuts the press down within one stroke of a misfeed. High-speed precision stamping at these rates still holds ±0.01 mm on critical features, and we confirm it with in-line sampling at a fixed interval rather than an end-of-batch check — at 800 SPM a drifting punch can fill a pallet with scrap before anyone notices.

一套完整的高速冲压系统是作为一个整体报价的：带热补偿的短行程压力机、带导正释放的伺服滚轮送料机（高速下送料节距精度保持在百分之几毫米内）、硬质合金冲头与凹模镶件，以及能在误送后一个行程内停机的模内力监控系统。高速精密冲压在这些速度下，关键特征仍能保持 ±0.01 mm；我们用固定间隔的在线抽样来确认，而不是等一批做完再检——800 次/分下，一个偏移的冲头在任何人察觉之前就能产出整托盘废品。

It is also the wrong answer often enough to be worth stating. When concentricity between a blanked outline and its internal holes matters more than output rate, compound die stamping wins, because every cut happens in one stroke on one centre line. Below a few hundred thousand parts a year, a conventional progressive die on a standard press is usually cheaper per part. Stroke-rate limits, carbide grade selection and the die-life arithmetic behind all of this are set out in our high speed metal stamping guide.

它同样经常是错误答案，所以值得说清楚：当落料外形与内部孔的同轴度比产出速率更重要时，复合模冲压更合适，因为所有切削都在同一行程、同一中心线上完成。年用量在几十万件以下时，普通压力机上的常规连续模通常单件更便宜。行程速度上限、硬质合金牌号选择以及背后的模具寿命算法，详见我们的高速金属冲压指南。

A sheet metal stamping die is never one material. The parts that actually cut — piercing punches, die buttons, trim steels — are tool steel, normally D2 (SKD11) hardened to HRC 58–62. Everything that holds those cutting sections in alignment is a different problem: die shoes, backing plates, punch holders and stripper plates need dimensional stability, machinability and weldability far more than they need wear resistance. That is where AISI 1045 earns its place, and it is why a quote for a stamping die should name the steel station by station rather than describing the whole tool as “tool steel”.

一副钣金冲压模具从来不是一种材料做成的。真正负责切削的部分——冲孔凸模、凹模镶件、切边钢——用模具钢，通常是淬硬到 HRC 58–62 的 D2（SKD11）。而负责把这些切削件固定在正确位置的所有零件，面对的是另一类问题：模座、垫板、凸模固定板与卸料板需要的是尺寸稳定性、可加工性与可焊性，而不是耐磨性。这正是 AISI 1045 的位置所在，也是为什么冲压模具的报价应该逐工位写清钢材牌号，而不是把整副模具笼统地说成“模具钢”。

AISI 1045 is a plain medium-carbon steel at 0.43–0.50% carbon and 0.60–0.90% manganese, supplied hot-rolled or normalized at 570–700 MPa tensile strength and 170–210 HB. It machines cleanly, it welds with preheat, and — the reason die builders keep specifying it — it stays flat through a 550–660 °C stress-relief cycle. For a die shoe or backing plate that has to hold punch-to-die clearance steady across a 400 mm strip, that stability is worth more than hardness. Cost is the second reason: plate stock in 1045 is a fraction of the price of pre-hardened tool steel, and on a large die set the plate material is a real line in the tooling budget.

AISI 1045 是普通中碳钢，含碳 0.43–0.50%、锰 0.60–0.90%，以热轧或正火状态供货，抗拉强度 570–700 MPa，硬度 170–210 HB。它切削顺畅，预热后可焊接；更重要的是——这也是模具厂一直指定它的原因——经过 550–660 °C 去应力退火后它依然保持平整。对于必须在 400 mm 料带上稳定保持凸凹模间隙的模座或垫板来说，这种稳定性比硬度更值钱。第二个原因是成本：1045 板材的价格只有预硬模具钢的一个零头，而在大型模架上，模板材料是模具预算里实实在在的一行。

Where wear genuinely occurs, 1045 can be flame- or induction-hardened to roughly Rc 54–60 on the surface. Its limits are equally clear: through-hardening only works to about 60 mm of section, and it does not respond to nitriding because it carries no alloying elements. In practice we specify 1045 for die shoes, backing plates, punch holders, stripper plates and spacer blocks, harden only the faces that actually slide or take impact, and never use it as a cutting edge on abrasive stock — stainless, electrical steel, silicon steel — where D2, SKD11 or a carbide insert is the correct section. Put 1045 on a pierce punch running 300 strokes a minute against stainless and it will lose its edge in a single shift.

在真正发生磨损的位置，1045 可以做火焰或感应淬火，表面硬度约达 Rc 54–60。它的局限同样明确：整体淬硬只适用于约 60 mm 以内的截面，而且因为没有合金元素，它不适合氮化。实际做法是我们把 1045 用在模座、垫板、凸模固定板、卸料板和垫块上，只对真正滑动或受冲击的表面做淬火，绝不会把它用作不锈钢、电工钢、硅钢等磨蚀性材料上的切削刃——那些位置正确的选择是 D2、SKD11 或硬质合金镶件。把 1045 装在以每分钟 300 冲次冲裁不锈钢的凸模上，一个班就会把刃口磨掉。

We are a stamping dies manufacturer as well as a production stamping shop, so we build the tool to the volume rather than to a fixed recipe: a 1045 plate set with hardened wear faces for pilot runs and low-volume dies, D2 cutting sections from a few hundred thousand strokes upward, and carbide only at the stations whose regrind interval is what actually stops the press. Every quotation states the die material by station and the expected regrind interval, so tooling cost is a number you can compare rather than a preference you have to take on trust. Send a STEP file with your annual volume and we return die design, station list and firm pricing within 24 hours.

我们既做冲压生产，也自制冲压模具，因此模具是按产量来配的，而不是套一个固定配方：试产与低产量模具用 1045 模板加淬硬磨损面；几十万冲次以上改用 D2 切削件；只有那些“修磨间隔决定停机”的工位才上硬质合金。每份报价都会逐工位写明模具材料与预计修磨间隔，让模具成本变成一个可以横向比较的数字，而不是必须靠信任接受的说法。把 STEP 文件与年用量发过来，24 小时内出具模具设计、工位清单与正式报价。