什么是冲压润滑,你应该使用哪种油?
Aug 20,2026

什么是冲压润滑,你应该使用哪种油?

冲压润滑是在冲压操作之前或期间,将专门配制的油或流体施加到金属板材和模具上,以控制摩擦、减少热量并防止拉伤或模具磨损。正确的油品选择取决于材料厚度、冲压速度和变形程度,但对于大多数厚度不超过 3 毫米的低碳钢应用,建议使用粘度在 40°C 下为 100-220 cSt 的氯化或硫化重型冲压油。对于铝和不锈钢,应使用低粘度、不含氯的成型油,并添加极压 (EP) 添加剂,以防止粘着和微观焊接。

冲压润滑的主要功能是什么?

冲压润滑剂的核心功能是摩擦控制、热管理和表面保护。摩擦控制是最关键的:润滑剂必须保持一致的摩擦系数(拉延操作通常为 0.08 至 0.12),以实现金属可预测地流入模具型腔。热管理可防止冲头与板材界面处出现局部过热,在速度为 200-600 次/分钟的高速级进模中,该界面温度可能超过 200°C。表面保护涉及形成物理屏障,防止金属与金属直接接触,减少粘着磨损(拉伤)和硬质颗粒引起的磨粒磨损。此外,润滑剂必须将细小的金属碎屑从模具表面冲走;否则,这些颗粒会充当磨料,将模具寿命缩短 30-50%。

什么是冲压润滑,你应该使用哪种油?

材料类型如何影响润滑剂的选择?

材料类型决定了基础油化学性质和添加剂包。对于低碳钢(DC01、SPCC),粘度为 60-150 cSt 的纯矿物油配合硫化 EP 添加剂效果良好,因为钢材具有延展性,不会与氯或硫发生剧烈反应。对于不锈钢(304、316),其加工硬化率高且极易拉伤,需要使用氯化石蜡基油(氯含量 1-5%)或含高磷且不含氯的替代品,以提供低于 0.06 的摩擦系数。铝合金(5052、6061)需要不含氯、低粘度(20-40 cSt)且含有脂肪酸酯的油品;氯会与铝反应生成腐蚀性副产物。对于镀锌钢,应避免使用硫化油,因为硫可能导致边缘变色和焊接性问题;应使用粘度为 40-80 cSt 的非反应性合成油。

您需要什么粘度和添加剂包?

粘度的选择基于冲头与模具之间的间隙、材料厚度和冲压速度。对于高速(300+ SPM)下的薄材料(0.5-1.5 毫米),需要低粘度油(40°C 下 20-50 cSt)以实现快速润湿和最小阻力。对于厚材料(3-6 毫米)或深拉延操作,高粘度油(150-300 cSt)可提供坚固的油膜,能够承受模具圆角处 100-200 MPa 的高压。添加剂包同样重要:EP 添加剂(硫、氯、磷)在高温(150-300°C)下激活,形成一层牺牲性金属盐层以防止焊接。边界润滑剂(脂肪酸、硬脂酸盐)在中温和中压下提供低摩擦膜。在冲压电子连接器(0.2-0.5 毫米黄铜)的级进模中,使用含有 2-3% 脂肪酸的低粘度(15-30 cSt)油是标准做法,以避免成品零件上的残留污染。

什么是冲压润滑,你应该使用哪种油?

冲压油的价格是多少,如何涂抹?

冲压润滑剂的成本从基础矿物油的每升 1.50 美元到高性能合成氯化配方的每升 8.00 美元不等。一台典型的中型冲压机(200 吨位,500 毫米 x 500 毫米模具面积)在使用喷涂方式(速率 10-20 毫升/分钟)时,每个 8 小时班次消耗 1.5 至 3.0 升油。涂抹方法包括辊涂(最适合平带材)、喷淋雾化(最适合级进模)以及滴注或刷涂(最适合手动操作)。对于 400 SPM 以上的高速冲压,使用雾化喷嘴在 0.3-0.5 MPa 气压下进行喷淋雾化,可提供均匀覆盖,并比浸没式涂抹减少 30% 的油耗。在我们的工厂,我们使用循环过滤系统,将油品寿命延长 200-300 小时,使总润滑剂成本降低 40%。

哪种冲压油最适合您的特定操作?

操作类型材料推荐油品类型40°C 粘度每升典型成本
冲裁(薄钢)低碳钢 0.5-2 毫米含硫轻质矿物油40-60 cSt2.00-3.00 美元
级进模(连接器)黄铜、磷青铜含脂肪酸的低粘度合成油15-30 cSt3.50-5.00 美元
深拉延(不锈钢)304 不锈钢氯化重型油150-220 cSt5.00-8.00 美元
铝冲压5052 铝不含氯、酯基油20-40 cSt4.00-6.00 美元
高速冲裁镀锌钢非反应性合成油40-80 cSt3.00-4.50 美元
热冲压22MnB5 硼钢无石墨高温油100-150 cSt6.00-9.00 美元

对于厚度不超过 3 毫米的钢的通用冲压,粘度为 100 cSt 的硫化油在性能和成本之间提供了最佳平衡,价格约为每升 3.00 美元。对于大批量生产铝制零件,必须使用酯基油,以避免白锈和表面蚀刻。

什么是冲压润滑,你应该使用哪种油?

为什么润滑剂的选择会影响模具寿命和零件质量?

不正确的润滑剂选择是导致模具过早失效和产生废品的主要原因之一。在深拉延操作中使用低粘度油会导致油膜破裂,造成模具圆角和冲头表面拉伤,将模具寿命从 500,000 次冲程缩短至 100,000 次以下。一次模具重磨操作成本为每个工具 200-500 美元,并需要 4-8 小时的停机时间。相反,在薄材料冲裁操作中使用粘度过高的油会导致零件过度粘附在模具中,引起送料失误和双重冲压,从而损坏模具。零件质量问题包括:边缘毛刺高度超过 0.05 毫米(典型规格为材料厚度的 10%)、在 10 倍放大下可见的表面划痕,以及超出 +/- 0.05 毫米公差的尺寸漂移。对于汽车结构件,即使是法兰区域的轻微拉伤也可能导致焊接气孔,并使零件在盐雾试验中不合格。

何时应更换冲压油以及如何监控?

当冲压油的粘度相对于原始值变化超过 10%、酸值 (AN) 超过 2.0 mg KOH/g,或含水量超过 0.5% 时,应更换冲压油。在带循环系统的连续操作中,每周使用简单的粘度杯检查油品,每月进行一次成本为 50-80 美元的实验室分析。需要更换的视觉指标包括深棕色或黑色、酸败气味或可见金属颗粒的存在。对于非循环喷涂应用,每 4-8 小时补充油品,每 5,000-10,000 次冲程彻底清洁模具区域,以防止油膜破裂和干燥残留物积聚。在我们以 250 SPM 运行的冲压线上,我们每两周(约 200 个运行小时)更换一次循环油箱中的油,以保持一致的零件质量。

常见问题解答

所有冲压操作都可以使用同一种油吗?

不可以,不建议所有操作使用同一种油,因为摩擦和温度要求差异很大。单一的多用途油要么会损害铝的表面光洁度,要么会缩短不锈钢的模具寿命。应根据您工厂中最苛刻的操作来选择油品,并通过粘度调节剂来适应其他材料。

使用过多的冲压油会怎样?

过多的油品涂抹会导致油在模具中积聚,引起液压锁定,从而可能使冲头开裂并增加零件粘附。这还会造成车间地面脏乱,增加下游操作的清洁成本,并可能留下干扰焊接或粘接的残留油。对于大多数冲压操作,最佳油膜厚度为 2-5 微米。

氯化冲压油对环境和工人安全吗?

氯化油效果显著,但由于在处理过程中可能形成二噁英,引发了环境和健康方面的担忧。现代短链 (C10-C13) 氯化石蜡受到欧洲 REACH 法规的限制。尽可能使用不含氯的替代品,并始终确保通过认证的处理商进行适当通风和废油处理。

温度如何影响冲压润滑性能?

高环境温度(高于 40°C)会降低油品粘度,使油膜变薄,增加金属与金属接触的风险。低温(低于 10°C)会增加粘度,使油品难以泵送和喷涂。为获得一致的性能,请将油品储存在 15-25°C,并考虑在寒冷气候下使用加热油循环系统。

冲压油可以重复使用或回收吗?

可以,如果过滤掉金属颗粒并与水分离,冲压油可以重复使用。离心分离器和 5 微米精度的滤芯过滤器可以将油品寿命延长 50-100%。然而,完全回收的油可能会损失添加剂性能,因此应将其与 20-30% 的新鲜油混合,以保持所需的极压性能。

哪种冲压油最适合食品级或医疗部件?

对于用于食品接触或医疗设备的部件,请使用食品级 (NSF H1) 合成油,该油无味、无臭,并经过认证可用于偶然食品接触。这些油的价格为每升 10-15 美元,粘度范围较低,为 20-50 cSt。在最终包装前,必须在清洗线上将其完全去除。

如何从成品零件上去除冲压油?

冲压油通常使用 50-70°C 的碱性水基清洗剂配合超声波搅拌清洗 3-5 分钟,然后进行去离子水冲洗和热风干燥。对于氯化油,可能需要使用预洗溶剂的两级清洗工艺。清洗操作每个零件增加 15-30 秒,成本约为每公斤零件 0.01-0.05 美元。

结论

选择正确的冲压润滑剂并非一项次要的耗材决策;它直接影响模具寿命、生产正常运行时间、零件质量和运营成本。对于大多数低碳钢应用,从粘度为 100 cSt 的硫化油开始;对于铝,改用不含氯的酯基油;对于不锈钢,使用重型氯化或高磷配方。在全面生产之前,先进行 1,000-5,000 次冲程的试运行来测试您选择的油品,并测量摩擦系数、零件表面光洁度和模具磨损情况。在 BQUQ,我们拥有 20 年的 CNC 加工、金属冲压、弹簧和散热器经验,我们根据零件几何形状和材料规格选择润滑剂,以确保大批量生产时质量稳定。

如需对您的冲压润滑需求进行工程审查或获取下一个项目的报价,请联系我们,我们将在 12 小时内回复。电子邮件:sc@bquq.com,WhatsApp:+86 13713157787,或访问 www.bquq.com。

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