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BQUQ CNC加工航空航天级钛合金紧固件,中国精密制造

这些钛合金紧固件是什么,以及它们为何能在300°C下保持紧固 这些是CNC加工的钛合金紧固件,专为航空航天安装、支架和壳体组件设计,在这些应用中,重量和疲劳寿命决定设计。我们使用锻造Ti-6Al-4V(5级)棒料加工,公差稳定在±0.005 mm,杆部至头部轴线的跳动量保证在0.01 mm或更小。经过固溶处理和时效后,硬度达到32-36 HRC,这使您在约56%的重量下获得钢的强度。标准直径的交货


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这些钛合金紧固件是什么,以及它们为何能在300°C下保持紧固

这些是CNC加工的钛合金紧固件,专为航空航天安装、支架和壳体组件设计,在这些应用中,重量和疲劳寿命决定设计。我们使用锻造Ti-6Al-4V(5级)棒料加工,公差稳定在±0.005 mm,杆部至头部轴线的跳动量保证在0.01 mm或更小。经过固溶处理和时效后,硬度达到32-36 HRC,这使您在约56%的重量下获得钢的强度。标准直径的交货期为10个工作日,我们从东莞工厂发货,并提供完整的材料可追溯性。

这不是目录产品。每批都是根据您的螺纹螺距、头部样式和表面处理量身定制的精密制造批次。您发送图纸或样品,我们在12小时内返回确定报价。由于我们备有六种常见直径的预认证钛合金棒料,您批准订单当天即可开始切割。

我们如何在五轴铣床上控制螺纹轮廓和跳动

航空航天紧固件上的螺纹并非装饰。振动下的松动配合会导致凸耳断裂。我们使用单点螺纹铣削在五轴铣床上切割所有螺纹,而非使用丝锥。这使我们获得符合3A级(外螺纹)中径公差等级的螺纹轮廓,且牙顶无撕裂。我们通过在同一夹紧工序中加工头部和杆部,将跳动控制在0.01 mm以下。这意味着驱动槽、承载面和螺纹轴线都相互对准。您无需垫片或铰孔即可使紧固件齐平安装。

对于螺母或镶件上的内螺纹,我们使用带0.2 mm圆角半径的定制硬质合金螺纹铣刀。这避免了尖锐V形螺纹在根部产生的应力集中。每个紧固件在离开机床前都经过100%螺纹量规检查。我们不抽样,我们对每一件产品进行检测。

我们用于高周疲劳的材料和热处理

我们加工三种钛合金等级,但航空航天紧固件几乎总是使用Ti-6Al-4V(5级)。这种合金提供至少950 MPa的抗拉强度和10^7次循环下500 MPa的疲劳耐久极限。对于靠近发动机的高温区域,我们改用Ti-6Al-2Sn-4Zr-2Mo(19级),其强度可保持至400°C。对于非结构性的、耐腐蚀关键卡箍,我们使用商业纯2级钛。

热处理工艺为920°C固溶退火、水淬,然后在540°C时效4小时。这产生32-36 HRC的硬度范围。我们绝不在完全硬化状态下加工钛,因为它会加工硬化并撕裂。相反,我们在退火状态下进行粗加工,然后在热处理后进行精加工,以保持±0.005 mm公差。每个热批都使用洛氏C标尺进行硬度测试,报告随货发送。

防止咬合的表面处理和涂层

未处理的钛合金紧固件在拧紧时会发生咬合。螺纹会与配合件卡死。我们通过两种方式解决此问题。首先,我们使用修光刃刀片进行精加工,使承载面和螺纹侧面达到Ra 0.4 µm。其次,我们涂覆干膜润滑剂(MIL-PRF-46010),将摩擦系数降至0.1。该涂层厚度为8-12 µm,在重复装配循环下不会剥落。

如果您的应用需要电气连接或额外耐腐蚀性,我们提供透明或黄色的阳极氧化(II型)。这增加2-3 µm的氧化层。我们不建议在螺纹上进行硬质阳极氧化,因为它会改变中径。对于大多数航空航天应用,干膜润滑是正确选择。

每次发货前的检验:三坐标测量机、螺纹量规和硬度报告

每箱货物都附带完整的检验报告。我们使用三坐标测量机(CMM)检查关键直径、头部高度和螺纹同心度。我们对100%的零件使用校准过的通止规。每个热处理批次取两个样品验证硬度。使用轮廓仪测量承载面的表面粗糙度。如果零件未通过任何检查,则报废,而非返工。我们宁愿损失一件钛,也不愿发运一个在您生产线上失效的紧固件。

所有检验设备每90天按ISO 9001:2015标准校准。校准证书可应要求提供。材料证书(EN 10204 3.1)列出每根棒料的钢厂来源、炉号和化学成分。

为什么无起订量意味着您可以在没有工厂最低要求的情况下进行原型制作

大多数航空航天紧固件供应商要求每种尺寸至少500件起订。这会扼杀您的原型预算。在BQUQ,我们实行无起订量政策。您可以订购10件用于测试夹具,或10,000件用于生产线。单件价格随数量下降,但设置成本相同,因此小批量订单定价透明。这是精密制造服务,而非标准件仓库。您为工程设置支付一次费用,然后零件价格按比例缩放。

我们为六种最常见的螺纹尺寸(M3、M4、M5、M6、M8、M10)备有5级钛合金预切毛坯。这将原型订单的交货期缩短至5个工作日。对于定制直径,增加3天用于材料切割。

定制航空航天紧固件的定价和交货期

定价取决于三个变量:材料等级、螺纹长度和涂层。一个标准的M6 x 1.0 x 25 mm 5级紧固件,带干膜润滑,100件时约$2.80/件。1,000件时降至$1.90/件。对于19级或定制头部样式,材料和刀具增加20-30%。我们在收到您的图纸后12小时内提供确定报价。报价包括交货期,而不仅仅是价格。标准交货期为10个工作日。对于加急订单,我们可以压缩至5天,需加收15%附加费。

获得准确报价所需提供的信息

发送STEP或IGES文件,或带尺寸的PDF图纸。包括螺纹尺寸和螺距、头部样式(六角、内六角圆柱头、沉头或定制)以及涂层要求。如果您有扭矩规格,请一并提供。这有助于我们选择合适的干膜润滑剂厚度。如果您没有图纸,请发送实物样品。我们将进行逆向工程,并在切割前确认尺寸。发送邮件至sc@bquq.com或WhatsApp +86 13713157787。我们在一个工作小时内回复。

我们在航空航天紧固件图纸中常见的错误

我们收到的大多数图纸上出现三个错误。首先,螺纹公差太松。2A级螺纹适用于一般用途,但航空航天需要3A级。其次,头部下方的圆角半径缺失。没有0.3-0.5 mm的圆角,零件在循环载荷下会在头杆连接处开裂。第三,表面粗糙度标注在杆部而非螺纹侧面。螺纹侧面需要Ra 0.8或更好以防止咬合。我们会在报价中标记这些问题并提出修正建议。这为您节省一次失败的测试循环。

如果您正在为这种钛合金加工选择合适的刀具,请阅读我们的CNC刀具选择指南。如需深入了解我们如何保持±0.005 mm公差,请查看CNC加工公差指南

规格数值
材料Ti-6Al-4V(5级),Ti-6Al-2Sn-4Zr-2Mo(19级),CP 2级
直径范围M3至M20(可根据要求定制至40 mm)
螺纹公差3A级外螺纹,3B级内螺纹
硬度32-36 HRC(5级,固溶处理和时效)
公差(直径)±0.005 mm
跳动(杆部至头部)≤ 0.01 mm
表面粗糙度承载面Ra 0.4 µm,螺纹Ra 0.8 µm
涂层干膜润滑剂MIL-PRF-46010(8-12 µm)或II型阳极氧化
交货期标准10个工作日,加急5天
起订量无起订量(接受原型订单)

这些钛合金紧固件的最小起订量是多少?

无起订量。我们以相同的设置质量加工10件用于原型或10,000件用于生产。

您能定制头部形状、螺纹长度或涂层吗?

可以,我们加工任何头部样式(六角、内六角、沉头、梅花头、定制),并根据您的图纸调整螺纹长度、涂层和材料等级。

您如何保证小批量订单的质量控制?

我们使用三坐标测量机和螺纹量规检查100%的零件,加上每个热批的硬度和表面粗糙度检查,并随货发送完整报告。

定制紧固件订单的交货期是多久?

标准为图纸批准后10个工作日;加急订单5天,需加收15%附加费。

12小时内获得确定报价

将您的图纸或样品发送至sc@bquq.com或WhatsApp +86 13713157787。我们在一个工作小时内回复,提供确定价格和交货期。没有笼统的估算,没有隐藏的刀具成本。只为您的CNC加工钛合金航空航天紧固件应用提供精确报价。中国制造,但质量纪律与德国或美国工厂相同。立即开始您的订单。


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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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