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BQUQ CNC加工自动车床20型六角孔弹簧夹头

此夹头夹持六角棒料无压痕、无打滑 这是一款CNC加工自动车床20型六角孔弹簧夹头,专为瑞士型及自动车床主轴设计,用于夹持六角棒料。内孔采用线切割加工成真正的六角形状,公差为±0.005 mm,确保每循环棒料精确对中。鼻端跳动控制在0.005 mm以内,即使在8,000 RPM转速下,加工出的六角特征仍保持同心。经真空热处理后硬度为58–60 HRC,可实现200,000次以上循环而内孔无磨损。 此


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此夹头夹持六角棒料无压痕、无打滑

这是一款CNC加工自动车床20型六角孔弹簧夹头,专为瑞士型及自动车床主轴设计,用于夹持六角棒料。内孔采用线切割加工成真正的六角形状,公差为±0.005 mm,确保每循环棒料精确对中。鼻端跳动控制在0.005 mm以内,即使在8,000 RPM转速下,加工出的六角特征仍保持同心。经真空热处理后硬度为58–60 HRC,可实现200,000次以上循环而内孔无磨损。

此夹头不会使六角边角变形,在重径向切削下也不会让棒料扭转。弹簧槽采用CNC铣削加工,根部带有0.3 mm圆角,消除应力断裂——这是廉价拉削夹头的常见失效模式。标准尺寸产品从东莞工厂发货,交期7天。这是BQUQ的精密制造,中国生产,首次试单无起订量。

20型六角孔几何形状如何应对扭矩

20型指夹头体直径为20 mm,标准自动车床锥角为30度。六角孔并非简单钻孔,而是全轮廓线切割型面,与棒料边角匹配,每边留有0.02 mm间隙。该间隙使夹头均匀闭合,不会压伤棒料边缘。

每个槽以15度螺旋角切割,将夹紧力沿20 mm全长夹持段均匀分布。这防止钻孔操作中棒料轴向后退。六角孔方向与主轴键槽平行,因此无需重新校准即可对刀。与圆孔夹头相比,此设计在六角棒料上的扭转夹持力提高35%。

我们采用的材料和热处理工艺确保长使用寿命

我们选用65Mn弹簧钢(相当于AISI 1065),而非廉价45#钢。毛坯退火至HRC 20便于加工,然后在真空炉中淬火以防止表面脱碳。最终回火使硬度达到58–60 HRC,芯部韧性为45 J/cm²。

内孔在热处理后进行磨削,而非之前,确保六角形状在淬火过程中不变形。随后施加黑色氧化处理(厚度0.005 mm),提供耐腐蚀性并减少夹紧/释放循环中的摩擦。弹簧槽在10倍放大下经激光检测,确保边缘无裂纹。这与我们用于航空航天级夹头的材料和工艺相同。

每件发货前全检——而非抽检

每件夹头均经过检测,而非每批抽一件。我们检查三个关键尺寸:六角孔对边宽度(WAF)、30度锥角和槽宽。锥角使用精密环规检测,确保95%接触面积——若低于此值,夹头即报废。

跳动在专用夹具上使用0.001 mm千分表测量,夹头在50%夹紧力下进行。最大TIR(总指示跳动)记录在检测报告中,随订单一同发货。鼻端和尾端均进行硬度测试,低于58 HRC即拒收。您将获得带有序列号和实际测量值的PDF报告。

CNC加工自动车床20型六角孔弹簧夹头规格表

<>数值
参数
夹头体直径20.00 mm (+0.0 / -0.02 mm)
锥角30° ± 0.5°
六角孔尺寸(对边)4.0, 5.0, 6.0, 7.0, 8.0, 10.0, 12.0 mm(可定制)
六角孔公差+0.015 / -0.005 mm
跳动(鼻端TIR)≤ 0.005 mm
表面粗糙度(内孔)Ra 0.4 µm
硬度58–60 HRC
夹持长度20 mm
最大推荐转速8,000 RPM
材料65Mn弹簧钢(AISI 1065)
交期(标准)7个工作日
起订量试单无起订量,生产价10件起

弹簧槽宽度为何决定夹紧力一致性

大多数夹头失效源于槽宽变化。我们的槽采用4刃硬质合金立铣刀在5轴CNC上加工至0.8 mm ± 0.02 mm。这确保每件夹头的弹簧刚度一致,更换磨损夹头时无需调整机床拉杆压力。

我们还将槽边缘倒角至0.1 mm,防止夹头卡住主轴鼻端。若您以重进给率加工12 mm六角棒料,槽设计可防止夹头在离心力下张开。这是大多数进口商忽视的细节,但却是50,000次与200,000次循环寿命之间的差异。

自动车床兼容性与刀具注意事项

此夹头适用于Citizen、Star、Tsugami等品牌的20型标准自动车床主轴,以及采用30度锥座的通用中国机床。六角孔方向遵循DIN 6341标准,因此您现有的送料手指可正确对齐。

为获得最佳效果,插入棒料前涂覆薄油膜——这可减少摩擦并防止六角边角磨损。若加工不锈钢303或304,我们建议内孔间隙增大0.01 mm以考虑热膨胀。关于材料选择和转速,请参阅我们的CNC刀具选择指南,以匹配夹头内孔与棒料公差。

定制六角尺寸和内孔修改

需要9.5 mm六角或11.0 mm对边尺寸?我们可在3.0 mm至14.0 mm范围内线切割任意六角尺寸,无需更改夹头体。定制内孔交期增加3天。我们还可增加0.5 mm深的后部泄压孔以改善冷却液流动,或增加键槽以实现防转。

对于拉回机构的公制或英制螺纹,我们可根据您的图纸加工后端。我们的工程团队将在4小时内审核您的主轴图纸以确认适配性。所有定制件均附带与标准件相同的检测报告。若您不确定应用的可接受公差,请阅读我们的CNC加工公差指南以确定正确限值。

试单有最低起订量要求吗?

首次试单无起订量——您可购买1件测试适配性和跳动,再决定是否投入批量生产。

能否加工标准列表之外的六角孔?

可以,3.0 mm至14.0 mm范围内任意对边尺寸,以0.1 mm递增,按您的精确尺寸线切割,公差同样为±0.005 mm。

发货前如何验证跳动?

每件夹头安装在精密心轴上,在50%夹紧力下使用0.001 mm千分表在鼻端测量;实际TIR值记录在检测报告中。

100件生产交期是多久?

100件标准20型六角孔夹头,从东莞发货,交期10个工作日;定制内孔增加3天。

请发送您的图纸或夹头规格,12小时内获得正式报价。邮箱sc@bquq.com或WhatsApp +86 13713157787。我们回复价格、交期及内孔几何DFM检查。BQUQ首次精密制造试单无起订量,中国制造。


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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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