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CNC加工自动车床46型圆孔加长夹头 | BQUQ

此夹头的功能及其对主轴的重要性 这是一款CNC加工自动车床46型圆孔加长夹头,专为圆形工件提供更深的夹持深度而设计。它可夹持棒料或预加工零件,保证跳动精度为0.005 mm TIR(总指示读数),内孔同心度为0.003 mm。夹持表面硬度为58–62 HRC,确保在200,000次循环中重复夹持力稳定且无变形。交货期为图纸确认后15天,我们从东莞发货,无起订量——即使只需一件也可下单。 此


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此夹头的功能及其对主轴的重要性

这是一款CNC加工自动车床46型圆孔加长夹头,专为圆形工件提供更深的夹持深度而设计。它可夹持棒料或预加工零件,保证跳动精度为0.005 mm TIR(总指示读数),内孔同心度为0.003 mm。夹持表面硬度为58–62 HRC,确保在200,000次循环中重复夹持力稳定且无变形。交货期为图纸确认后15天,我们从东莞发货,无起订量——即使只需一件也可下单。

此夹头适配自动车床46型主轴,该主轴常见于黄铜、铝和易切削钢的大批量车削加工。加长圆孔设计使您能够更靠近切削区域夹持较长工件,减少振动和偏转。这意味着与标准夹头相比,进给率可提高15%,同时不影响表面光洁度。

圆孔与六角或方形:为何加长圆孔在圆柱工件加工中更胜一筹

圆孔并非普通孔洞,而是经过精密磨削的圆柱孔,内径公差为0.002 mm。与六角或方形夹头不同,圆孔将夹持压力均匀分布在360度范围内,消除了车削零件上常见的三点应力痕迹。对于自动车床加工(通常需送入卷料或预磨棒料),加长设计(夹持深度可达60 mm)提供了稳定的平台。我们采用单点镗孔刀具加工内孔,随后进行珩磨工序,使表面光洁度达到Ra 0.4 µm。光滑的内孔可防止6061铝或360黄铜等软材料发生咬合。

外锥度磨削至16度,与自动车床46型主轴鼻端匹配。我们使用精密气动量仪(而非标准塞规)检查每个锥度,确保夹头完全座入主轴,消除轴向跳动。如果主轴存在轻微磨损痕迹,加长本体可提供更多表面接触以进行补偿——这是短夹头无法做到的。

我们用于200,000+次循环的材料和热处理工艺

我们选用20CrMnTi合金钢,这是一种精密制造中常见的渗碳钢等级。毛坯采用锻造而非棒料切割,以使晶粒流向沿夹头本体对齐。粗加工后,在920°C下渗碳6小时,然后淬火和回火,实现0.8–1.2 mm的渗碳层深度。表面硬度为58–62 HRC,而芯部保持32–36 HRC以确保韧性。这种组合使夹头在侧向载荷下不会开裂,同时夹持表面能抵抗磨蚀性棒料的磨损。

对于内螺纹(M20 x 1.5拉回螺纹),我们在热处理后采用螺纹铣削工艺,而非热处理前加工,以保持6H级螺纹精度。六个槽在硬车削后使用线切割EDM加工,避免铣刀产生的热影响区。每个槽边缘均手工去毛刺并抛光至Ra 0.8 µm,以防划伤工件。我们不使用涂层,因为裸露的硬化钢对钢制工件具有最佳摩擦系数(0.15–0.18)。

每次发货前的检验:气动量仪和三坐标测量机报告

没有完整检验报告,我们不会发货。每个单元均在三坐标测量机(CMM)上测量,分辨率为0.0005 mm。关键检查项目包括:锥度角(16° ± 2角分)、内孔直径(公差+0.005 / -0.000 mm)以及内孔与锥度之间的同心度(0.003 mm)。对于跳动测试,我们将夹头安装在测试主轴上,以3000 RPM旋转,同时读取鼻端千分表读数。读数必须低于0.005 mm TIR,否则零件将被报废——而非返工。

我们还对每批产品使用洛氏硬度计进行硬度测试,读数直接刻印在夹头本体上,而非仅记录在文件中。内孔表面光洁度使用轮廓仪检查;任何超过Ra 0.4 µm的产品均被拒收。如果您指定特殊材料或涂层,我们会增加盐雾测试(48小时)以验证耐腐蚀性。CMM屏幕和千分表读数的照片会在发货前通过电子邮件发送给您,无需主动要求——这是标准流程。

规格数值
夹头类型CNC加工自动车床46型圆孔加长夹头
材料20CrMnTi合金钢(锻造)
硬度58–62 HRC(渗碳层深度0.8–1.2 mm)
内孔直径范围3 mm – 30 mm(可定制尺寸)
内孔公差+0.005 / -0.000 mm
同心度(内孔至锥度)0.003 mm
跳动(3000 RPM时TIR)0.005 mm
表面光洁度(内孔)Ra 0.4 µm
锥度角16° ± 2角分
夹持深度(加长)最大60 mm
交货期15天(图纸确认后)
起订量无起订量(接受单件)

为何0.005 mm跳动对自动车床生产至关重要

在自动车床上,主轴转速通常为4000–6000 RPM。在此速度下,夹头的任何跳动都会直接转化为更大的车削直径。如果夹头跳动为0.02 mm,您将看到椭圆形零件和缩短的刀具寿命。我们的0.005 mm跳动意味着成品零件直径保持在±0.01 mm以内,足以满足大多数压配或轴承座应用。这不是实验室测量——我们在包装前在真实主轴上测试。

加长本体还可减少重切削下的偏转。标准夹头在钢件上切深2 mm时可能弯曲0.03 mm,而我们的加长版本凭借更厚的壁厚仅弯曲0.01 mm。因此,我们推荐将此夹头用于长径比超过3:1的零件。您也可以将其用作旧机器上磨损夹头的替换件;自动车床46型锥度是标准接口,无需修改主轴。

定制选项:内孔尺寸、槽数和拉回螺纹

我们标准生产3 mm至30 mm的内孔尺寸。但如果您需要31.5 mm内孔或特殊深度,我们也能实现。大多数尺寸的槽数为六个——这在夹持强度和灵活性之间取得了良好平衡。对于薄壁管材(壁厚小于1 mm),我们推荐12槽设计。我们还可以将拉回螺纹从M20 x 1.5改为您使用的任何公制或英制螺纹。请将您的主轴图纸发送给我们,我们将精确匹配螺纹螺距和座入角。

对于高腐蚀环境,我们提供发黑处理或化学镀镍(5 µm厚度)。这些不会影响硬度,但会增加防锈性能。如果您加工不锈钢工件,我们可以将内孔表面粗糙度略微提高至Ra 0.6 µm,以减少摩擦并防止冷焊。定制不会改变交货期——仍为15天。您只需在图纸或电子邮件中指定选项即可。

如何将此夹头安装到您的自动车床46型主轴上

安装非常简单:清洁主轴鼻端锥度,涂上一层薄油膜,然后将夹头滑入。拉回螺纹与拉杆啮合。按照机器手册中指定的扭矩拧紧(通常为40–60 Nm)。安装后,以1000 RPM运行主轴30秒以检查振动。如果跳动超过0.005 mm,很可能是锥度不洁——擦拭后重新安装。夹头重量约1.8 kg,易于操作。

我们建议使用扭矩扳手(而非冲击扳手)操作拉杆。冲击扳手可能过度拧紧并导致夹头本体变形。过度拧紧是我们看到的退货零件过早失效的最常见原因。此外,在插入棒料前检查内孔是否有切屑。工件下的小切屑可能使内孔失圆,造成虚假的跳动读数。如果遵循这些步骤,夹头应能承受200,000次夹持循环而无明显磨损。

此夹头的最小起订量(MOQ)是多少?

没有起订量——即使您只需一件,我们也会制造并发货,但10件及以上可享受折扣。

您能否根据我的特定工件定制内孔直径或夹持深度?

可以,我们可定制内孔直径(标准3–30 mm,可要求最大40 mm)、夹持深度(最大60 mm)、槽数和拉回螺纹尺寸,以匹配您的主轴或零件。

发货前如何确保质量控制?

每个夹头均经过三坐标测量机检验、3000 RPM真实主轴跳动测试、洛氏硬度测试和表面光洁度检查,所有报告在发货前通过电子邮件发送给您。

交货期和运输方式是什么?

交货期为图纸确认后15天,我们通过DHL、FedEx或UPS从东莞发货并提供跟踪信息;紧急订单可加急至10天,需加收10%费用。

有图纸?12小时内获取正式报价

将您的零件图纸或主轴规格发送给我们,我们将在12小时内确认确切的内孔尺寸、锥度和螺纹。如有任何不明确之处,我们的工程师会致电您——我们绝不猜测。将图纸发送至sc@bquq.com或通过WhatsApp联系+86 13713157787。如需更多关于将此夹头与您的刀具匹配的信息,请阅读我们的CNC刀具选择指南。要了解我们如何实现这些公差,请查看我们的CNC加工公差指南。这是中国制造的精密加工,无起订量——立即获取报价。


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参数

参数能力范围
材料AL6061/7075, SUS303/304/316, 45#钢, T2铜, H59黄铜, POM, PEEK, 尼龙
公差±0.005mm标准,±0.003mm可按需定制
设备3/4/5轴CNC, 车铣复合, 瑞士型车床
表面处理阳极氧化, 镀镍, 镀锌, 钝化, 喷砂, 抛光
尺寸范围最大400 x 300 x 200 mm
打样72小时,样品无最小起订量
检测每批次提供完整报告,可按需提供CMM数据

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