夹头尺寸表:36、46、52、60、630、643——系统工作原理

要点速览

阅读36/46/52/60/630/643系列夹头尺寸表,以棒料优先:内孔匹配棒料,六角按对边尺寸。BQUQ 将其加工至0.005毫米精度等级(ISO9001)。

夹头尺寸表:36、46、52、60、630、643——系统工作原理
作者 BQUQ Editorial Team 审核 BQUQ Quality Engineering 2026年4月10日 更新于 2026年6月10日 次阅读 ISO 9001:2015 认证工厂

夹头尺寸表:36、46、52、60、630、643——系统工作原理

夹头尺寸表的读取以棒料优先:在夹头系列(36、46、52、60、630、643)的内孔阶梯表中找到您棒料的标称尺寸,然后确认内孔与棒料形状及公差窗口匹配。图表的作用是匹配内孔与棒料,而非机床与棒料——每张图表都围绕夹头可夹持的棒料尺寸组织,以公制或英制步进排列。

尺寸表看起来令人生畏,因为它们以每个系列的密集内孔表格形式印刷。去掉格式后,夹头尺寸表回答一个问题:对于这种棒料尺寸,我应该订购哪种内孔?答案几乎总是“与您棒料标称尺寸相等的内孔”,在您机床使用的系列内。图表的存在是为了捕捉简单规则失效的情况——英制棒料配公制夹头、六角棒料按直径而非对边尺寸订购,或尺寸过小的棒料超出夹持范围。

夹头尺寸表如何组织

图表是嵌套的:先系列,再形状,然后内孔阶梯。在“52型”下,您会找到圆形、六角和方形内孔的部分,每个形状内有一列内孔尺寸。内孔阶梯是图表的核心——它是夹头可夹持的棒料直径列表,并告诉您哪些尺寸是标准的,哪些是定制的。

大多数制造商库存的圆形内孔步进与常见棒料尺寸对应:小端步进更细,大端步进更粗。典型的公制阶梯在约10毫米以下以0.5毫米步进,以上以1毫米步进,因为棒料本身按这些增量拉制。半毫米和0.1毫米步进作为定制内孔存在——这是图表与图纸交汇、标准列表结束的地方。

公制棒料(毫米)最接近的英制棒料等效(毫米)备注
3.01/8英寸3.175英制棒料订购3.175内孔
4.05/32英寸3.969常见销钉棒料
5.03/16英寸4.763
6.01/4英寸6.350非常常见的自动车床尺寸
7.09/32英寸7.144
8.05/16英寸7.938
9.03/8英寸9.525
10.0——公制阶梯以1毫米步进继续
12.01/2英寸12.700英制棒料订购12.7内孔
14.09/16英寸14.288
16.05/8英寸15.875

显示精确的英制到公制转换是因为这是图表错误发生的地方。6毫米内孔和1/4英寸(6.35毫米)内孔是不同的夹头;将英制棒料强行装入公制内孔会留下0.35毫米的间隙,夹爪无法夹持。如果您的零件以英寸标注,先将棒料转换为毫米,然后订购转换后的内孔,或订购按精确英制尺寸切割的夹头。

为什么内孔等于棒料,而非棒料加间隙

新买家经常要求内孔略大于棒料,“以便更容易送料”。这种逻辑颠倒了设计。弹簧夹头通过闭合到棒料上几百分之一毫米来夹持;工作间隙内置于内孔中,通常在0.01–0.05毫米范围内,具体取决于系列和棒料公差。添加可见间隙后,夹爪在接触棒料前就闭合到自然停止点,导致棒料松动。

图表假设棒料公差合理。冷拉圆棒料运行粗级;磨削棒料运行细级,等级改变相同内孔的行为。

棒料公差(ISO 286,10–18毫米)偏差(微米)在固定内孔下的效果
h6(磨削)0 / −11夹持一致,跳动最佳
h7(拉制并定径)0 / −18大多数工作夹持良好
h8(精密拉制)0 / −27可接受,检查夹持窗口
h9(拉制)0 / −43小内孔时边缘
h11(粗拉)0 / −110夹持不可靠;重新定心或磨削棒料

要点:当跳动重要时,购买h7或更好的棒料,并告知夹头制造商等级。夹头无法纠正尺寸小0.1毫米的棒料——槽几何形状没有那么多行程。

读取形状列:圆形、六角、三角形、方形

形状列改变了“尺寸”的含义。圆形内孔按直径定径。六角和方形内孔按对边尺寸(AF)定径,即平行边之间的距离,因为这是V形或平面上定位的尺寸。三角形内孔也按对边尺寸定径,仅当棒料截面确实为三角形时使用。

按棒料角到角直径订购六角夹头是经典错误:它产生永不接触平面的内孔。始终按对边尺寸切割多边形夹头。六角夹头在其平面上夹持,夹爪排列使棒料角位于槽或支撑点之间——这就是为什么多边形夹头比相同尺寸的圆形夹头有更多槽。

棒料形状要匹配的尺寸常见开槽
圆形直径3槽
六角对边尺寸3槽,角支撑
方形对边尺寸通常4槽
三角形对边尺寸3槽,角对齐

我们在圆形、六角和三角形内孔夹头中详细说明几何差异。简而言之:如果您的棒料不是圆形,停止阅读图表的圆形列。

系列列的位置

图表按系列印刷,因为内孔阶梯在每个类型代码下重复。46型圆形图表和52型圆形图表列出类似的内孔;不同的是内孔之外的一切——体径、锥度、螺纹。当您从图表中选择内孔时,必须从您机床使用的系列图表中选择。

数字序列36、46、52、60、630、643是一系列机床接口系列,不是从小到大的尺寸进展。643系列不是“比60大”像60比36大;代码只是标识自动车床类别中使用的不同接口几何。按机床和卡盘选择系列,然后读取内孔阶梯。我们的自动车床夹头指南完整解释了系列逻辑。

图表结束处:定制内孔

图表涵盖标准棒料。实际生产运行在非标准尺寸上:5.56毫米线材、7.94毫米六角、公制机床中的英制棒料,或需要按实际测量尺寸切割内孔的紧公差棒料。这时图表让位于图纸。

定制内孔对夹头工厂来说是正常订单,而非特殊订单。工厂从系列加工夹头毛坯,然后按您的棒料尺寸切割和磨削内孔,工作间隙和槽模式与您的棒料公差匹配。交货时间比标准内孔长,价格略高,但夹持和跳动可预测,因为内孔是为您的棒料设计的。

如果您的尺寸介于图表步进之间或棒料形状非标准,请将棒料规格发送给工厂,而不是强行使用最接近的列出的内孔。在BQUQ,我们在36/46/52/60/630/643系列中切割定制内孔,使用与标准范围相同的CNC生产线,硬化后磨削,保持内孔几何至0.005毫米精度等级。我们的自动车床夹头系列列出标准系列,包括带六角内孔的52型夹头,我们的定制夹头设计指南涵盖非标准尺寸的图纸要求。如果机床侧也在升级,同一工厂制造这些夹头所在的瑞士型和2J夹头卡盘。

有图纸?12 小时内拿到工厂报价。
把 PDF/DXF/STEP 图纸发到 sc@bquq.com 或 WhatsApp +86 137 1315 7787,工程师审图后回复价格、交期与 DFM 建议(工作日)。
常见问题

问:我的夹头内孔应该完全等于棒料直径吗?

答:对于标称尺寸,是的,但通常有约0.01–0.05毫米的小工作间隙,以便棒料通过。切勿添加可见间隙:弹簧夹头需要闭合到棒料上,多余间隙意味着夹爪在夹持前停止。

问:图表上的类型号和内孔尺寸有什么区别?

答:类型号(36、46、52、60、630、643)选择适合您机床接口的夹头系列。内孔尺寸从该系列内的图表读取,选择夹头夹持的棒料。图表按内孔优先组织,因为这是每个订单变化的。

问:一个夹头能覆盖一系列棒料尺寸吗?

答:仅在槽行程内,即几百分之一毫米。为6毫米棒料制造的夹头无法可靠夹持6.5毫米棒料。对于多种棒料尺寸,购买多个内孔或设计有更宽夹持范围,如果应用容忍跳动权衡。

问:如何从图表中确定六角夹头尺寸?

答:使用六角棒料的对边尺寸,绝不用角到角直径。在您系列图表的六角列中找到该值。如果您的对边尺寸未列出,则为定制内孔订单。

问:我的棒料是英制测量但机床是公制。我应该订购哪种内孔?

答:精确转换英制棒料为毫米——1/4英寸是6.350毫米,不是6.0毫米——并订购按英制尺寸切割的夹头。公制内孔配英制棒料会留下间隙,破坏夹持。发送精确棒料尺寸,工厂将切割正确内孔。

由BQUQ工程团队撰写。BQUQ是中国东莞的ISO9001认证源头工厂,在同一屋檐下运营CNC加工、金属冲压、定制弹簧、散热器和夹头生产线。将图纸发送至sc@bquq.com或WhatsApp +86 13713157787,12个工作小时内报价。www.bquq.com



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