什么是级进模冲压?多工位模具工作原理详解
Aug 21,2026

什么是级进模冲压?多工位模具工作原理详解

级进模冲压是一种高速金属成形工艺,其中卷料带材被送入配备多工位模具的单台压力机,在一次连续冲程中完成多项操作(冲裁、弯曲、拉深、压印)。每个压力机冲程将带材精确推进一个步距,每个工位依次执行一个步骤,直到成品从最终工位脱离。该方法的产量可达每分钟200至1500件,公差控制在±0.025毫米以内,是高量产精密零件最具成本效益的选择。

级进模如何逐步工作?

该工艺首先将一卷金属板材(通常厚度为0.1毫米至6.0毫米)送入配备级进模的压力机。模具包含一系列工位,每个工位执行不同的操作:导正、下料、冲孔、成形、拉深和最终切断。带材由送料机构(通常是伺服滚轮送料机)推进,该机构在每个压力机冲程中精确地将材料步进到下一个工位。

在第一个工位,导正销与预冲孔配合,精确定位带材,确保位置重复精度在±0.005毫米以内。后续工位逐步增加特征:切口工位切割部分轮廓,成形工位将翻边弯曲至特定角度,拉深工位则形成杯形或凸起。最终工位通过切断或下料操作将成品零件与带材分离。由于所有操作在同一带材的不同工位上同时进行,循环时间等于压力机冲程速率,消除了步骤之间的单独搬运。

什么是级进模冲压?多工位模具工作原理详解

级进模可以执行哪些操作?

级进模可以在单个模具中组合多种成形和切割操作。常见操作包括下料(切割外部轮廓)、冲孔(制作孔)、切口(部分切割和弯曲)、弯曲(V形弯曲、U形弯曲、折边)、拉深(深杯或浅杯)、压印(压缩表面细节)和压花(凸起或凹陷特征)。高级模具还可以执行攻丝、侧向冲孔和用于倒扣的凸轮驱动操作。

例如,一个典型的电气连接器端子可能需要12道操作:导正孔冲孔、边缘修整、四次独立弯曲、一次切口、一次用于触点硬度压印,以及最终切断。此类零件的带材厚度通常为0.2毫米至0.5毫米的铜合金,模具具有14至20个工位。级进模中每工位的最大拉深深度限制在带材宽度的大约70%,对于更深零件需要多个拉深工位。

为什么选择级进模冲压而非其他方法?

当年产量超过50,000件时,级进模冲压通常优先于单工序冲压、CNC加工或金属注射成型(MIM)。主要优势在于单件成本:在500,000件产量下,级进模零件每件成本为0.02至0.15美元,而相同几何形状的CNC加工成本为每件0.80至2.50美元。次要优势包括一致的重复性(同一卷材的所有零件具有相同的尺寸特征)、最少的人工干预(工艺完全自动化)以及减少材料浪费(排样使带材上的零件紧密排列,材料利用率达到65%至85%)。

与多滑块冲压相比,级进模提供更严格的公差(±0.025毫米对比±0.05毫米),并且更适合需要平面度控制的零件。与精冲相比,对于厚度小于3.0毫米的零件,级进冲压更快且更便宜,但精冲可获得更光滑的剪切边缘。对于具有复杂三维形状的零件,当带材可以定向以避免材料撕裂时,优先选择级进模,这取决于弯曲半径大于材料厚度的0.5倍。

什么是级进模冲压?多工位模具工作原理详解

哪些材料最适合级进模冲压?

最适合级进模冲压的材料是那些具有高延展性、厚度均匀和硬度一致的材料。常见选择包括用于结构件的低碳钢(SPCC、DC01)、用于耐腐蚀部件的奥氏体不锈钢(SUS301、SUS304)、用于轻量化散热器和支架的铝合金(5052、6061)、用于电触点的铜合金(C1100、C17200铍铜)以及用于弹簧触点的镍银合金。材料硬度通常在80至200 HV之间,较硬的材料需要更大的吨位并导致更快的模具磨损。

带材宽度范围为5毫米至600毫米,标准卷重可达10吨。对于高强度应用,热冲压钢(22MnB5)可以在温冲压变体中于高温(850°C至950°C)下冲压,但这需要专门的模具冷却,并非标准级进模的典型应用。材料成本占总零件成本的40%至60%,因此选择满足结构要求的最薄规格至关重要。

级进模模具成本是多少?交期多长?

级进模模具成本因零件复杂度、工位数量和材料厚度而异。简单模具(5至8个工位,0.5毫米厚材料)成本为8,000至20,000美元。中等复杂度模具(10至15个工位,包含弯曲和拉深)成本为25,000至60,000美元。高复杂度模具(20个以上工位,带凸轮动作、侧向冲孔和严格公差)成本为70,000至150,000美元。模具交期:简单模具4至8周,中等模具8至12周,复杂模具12至16周。

下表总结了BQUQ使用的三种级进模类别的典型规格:

模具类别工位数材料厚度公差模具成本交期最大零件尺寸
简单5-80.1-1.0毫米±0.05毫米8千-2万美元4-6周50 x 50毫米
中等10-150.3-3.0毫米±0.025毫米2.5万-6万美元8-12周200 x 150毫米
复杂20-300.5-6.0毫米±0.013毫米7万-15万美元12-16周400 x 300毫米

什么是级进模冲压?多工位模具工作原理详解

可实现哪些公差和表面光洁度?

级进模冲压可实现标准特征±0.025毫米的位置公差,导正控制特征为±0.013毫米。厚度小于1.0毫米的零件,平面度保持在每25毫米长度0.05毫米以内,毛刺高度控制在材料厚度的10%以下(例如,0.3毫米厚材料为0.03毫米)。剪切边缘的表面光洁度通常为1.6至3.2微米Ra,而成形表面保留原材料光洁度(例如,冷轧钢为0.4微米Ra)。

对于关键应用,二次操作如去毛刺(振动或滚筒抛光)可将边缘毛刺减少到0.01毫米以下,每件增加0.005至0.02美元。不锈钢零件的电解抛光或钝化处理根据面积每件增加0.01至0.05美元。尺寸稳定性极佳:在单次生产批次中,零件变化小于±0.01毫米,模具磨损可通过模具调整补偿,在需要重新研磨前可保持公差达100万至500万次冲程。

何时应避免使用级进模冲压?

当年产量低于10,000件时,应避免使用级进模冲压,因为模具成本无法有效摊销;可考虑CNC加工或激光切割。此外,对于具有无法在单一垂直方向成形且需要复杂凸轮动作的倒扣零件,也应避免使用,因为这会增加30%至50%的模具成本。需要紧密内角(半径小于材料厚度的0.3倍)或每工位拉深深度超过带材宽度70%的零件不适合,因为它们会导致撕裂或过度减薄。

此外,厚度超过6.0毫米的材料很少采用级进冲压,因为压力机吨位呈指数增长(例如,12毫米厚钢的100毫米切割长度需要超过500吨),使得热锻或板材加工更经济。如果零件需要特定的材料晶粒流向(用于高强度疲劳应用),级进冲压的剪切边缘可能无法提供所需的微观结构;可考虑锻造。最后,如果预计会有快速的设计变更,应避免硬质模具,因为每个工位的模具修改成本为2,000至10,000美元。

级进模零件的关键设计规则是什么?

面向级进冲压的设计要求最小材料厚度为0.1毫米,最大为6.0毫米。弯曲半径必须至少为软钢材料厚度的0.5倍,铝材为1.0倍,以防止开裂。孔径必须大于材料厚度,孔到边缘的距离必须至少为材料厚度的1.5倍,以避免变形。带材宽度应最小化,同时在两侧保留2至5毫米的载体带用于导正孔和稳定性。

导正孔直径必须至少为1.5毫米,并位于距带材边缘2毫米以内。成形方向最好向下(进入模具)以简化设计;向上成形需要弹簧卸料板,增加复杂性。拉深杯形件建议采用0.5至1度的脱模斜度,以利于脱模。避免毛坯轮廓中的尖角;使用至少0.3毫米的圆角半径以减少模具应力,并将模具寿命从50万次延长至200万次冲程。

如何计算每件生产成本?

每件生产成本是材料成本、模具摊销、压力机时间成本和二次操作的总和。对于一个重5克的0.5毫米厚SPCC钢零件,材料成本约为0.01美元(钢材每吨2,000美元)。30,000美元模具在500,000件产量下的摊销为每件0.06美元。110吨压力机以每分钟100冲次运行时,压力机成本为每冲次0.003美元,加上每件0.01美元的人工管理费用,总计每件0.083美元。二次操作(去毛刺、清洗)增加0.02美元,最终成本为每件0.10美元。

对于更高产量,模具摊销显著下降:在200万件时,摊销为0.015美元,总成本降至每件0.055美元。压力机速度也影响成本:以300 SPM而非100 SPM运行可使每小时产量增加三倍,人工成本降低60%。BQUQ建议按100万件报价以获得最佳成本,因为这平衡了模具寿命(通常在大修前可进行500万至1000万次冲程)和摊销。

常见问题解答

级进模冲压的最大零件尺寸是多少?

最大实际零件尺寸约为400毫米x 300毫米,厚度为6.0毫米,受压力机工作台尺寸和带材宽度限制。更大的零件可以冲压,但需要超过500吨的压力机,大幅增加模具和运营成本。对于超过500毫米的零件,可考虑传递模冲压或CNC加工。

级进模的使用寿命有多长?

维护良好的级进模,未涂层工具钢(D2、A2)可使用500万至1000万次冲程,硬质合金镶件可使用2000万至4000万次冲程。定期维护包括每50万次冲程重新研磨切削刃,每100万次冲程更换磨损件(导正销、弹簧)。在BQUQ,我们每25万次冲程安排一次预防性维护,以确保一致的公差。

级进模冲压可以生产带螺纹的零件吗?

可以,攻丝可以通过攻丝工位集成到级进模中,以全压力机速度生产内螺纹(M1.6至M6)。这增加一个工位,模具成本增加5,000至15,000美元。或者,对于外螺纹,可以在模具内进行螺纹成形(适用于延展性材料)或螺纹滚压。

级进模和传递模冲压有什么区别?

级进模冲压使零件在最终工位之前一直连接在带材载体上,使用导正孔进行对齐。传递模冲压将零件从带材上切断,并通过机械手指或夹爪在工位之间传递。级进模更快,更常用于中小型零件,而传递模可处理需要360度访问的大型、复杂零件。

哪些行业最常使用级进模冲压?

汽车行业使用级进模生产支架、连接器和隔热罩,消费电子行业用于EMI屏蔽罩、电池触点和散热器。医疗器械制造商将其用于手术器械和植入式设备组件,而航空航天领域则用于轻量化夹子和支架。BQUQ为这些行业供应级进冲压零件,其中70%的产出用于汽车和电子行业。

如何降低级进模的模具成本?

通过组合操作减少工位数量(例如,使用单个成形-冲孔工位代替独立步骤)。通过增大弯曲半径和避免严格公差(±0.05毫米而非±0.013毫米可降低研磨成本)来简化零件几何形状。使用目录中的标准模具组件(导柱、导套、冲头),并在产量低于200万件时选择较低成本的工具钢(D2而非硬质合金)。

级进模冲压需要多大的压力机吨位?

压力机吨位通过计算切割力(剪切强度x切割长度x厚度)、成形力和卸料力的总和来确定。例如,在1.0毫米厚SPCC(剪切强度350兆帕)中切割100毫米周长需要35吨,加上20%的卸料力,总计42吨。经验法则:1.0毫米钢每2.5毫米切割长度需要1吨。BQUQ使用25至600吨的压力机,其中110吨型号是中等零件最常见的。

结论

级进模冲压是厚度在0.1毫米至6.0毫米之间的高产量精密金属零件的最佳制造工艺,可实现±0.025毫米的公差和高达每分钟1500件的生产率。成本效益的关键在于产量:模具在500,000件产量下摊销后,大多数几何形状的单件成本降至0.15美元以下。在BQUQ,我们拥有20年的级进模设计经验,包括散热器组件和连接器端子,确保提供满足您公差和交期要求的稳健模具。如需详细的可行性评估和报价,我们的工程团队将在12小时内回复。请联系 sc@bquq.com,WhatsApp +86 13713157787,或访问 www.bquq.com。

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