麻花钻头各部分的名称和作用是什么?

2025年04月02日 06:48
有4个网友回答
网友(1):

麻花钻由柄部、颈部及工作部分组成。柄部是钻头的夹持部分,用以定心和传递动力;颈部是为磨制钻头时供砂轮退刀用的,钻头的规格和商标一般也刻在颈部;麻花钻的工作部分起切削和导向的作用。

麻花钻是通过其相对固定轴线的旋转切削以钻削工件的圆孔的工具。因其容屑槽成螺旋状而形似麻花而得名。

扩展资料:

麻花钻的几何形状虽比扁钻合理,但尚存在着以下缺点:

1、标准麻花钻主切削刃上各点处的前角数值内外相差太大。钻头外缘处主切削刃的前角约为+30°;而接近钻心处,前角约为-30°,近钻心处前角过小,造成切屑变形大,切削阻力大;而近外缘处前角过大,在加工硬材料时,切削刃强度常嫌不足。

2、横刃嫌长,横刃的前角是很大的负值,达-5 4°~-6 0°,从而将产生很大的轴向力。

3、与其他类型的切削刀具相比,标准麻花钻的主切削刃很长,不利于分屑与断屑。

4、刃带处副切削刃的副后角为零值,造成副后刀面与孔壁间的摩擦加大,切削温度上升,钻头外缘转角处磨损较大,已加工表面粗糙度恶化。

以上缺陷常使麻花钻磨损快,严重影响着钻孔效率与已加工表面质量的提高

网友(2):

麻花钻由柄部、颈部及工作部分组成。柄部是钻头的夹持部分,用以定心和传递动力;颈部是为磨制钻头时供砂轮退刀用的,钻头的规格和商标一般也刻在颈部;麻花钻的工作部分起切削和导向的作用。

麻花钻是通过其相对固定轴线的旋转切削以钻削工件的圆孔的工具。因其容屑槽成螺旋状而形似麻花而得名。

加工影响

(1)麻花钻的直径受孔径的限制,螺旋槽使钻芯更细,钻头刚度低;仅有两条棱带导向,孔的轴线容易偏斜;横刃使定心困难,轴向抗力增大,钻头容易摆动。因此,钻出孔的形位误差较大。

(2)麻花钻的前刀面和后刀面都是曲面,沿主切削刃各点的前角、后角各不相同,横刃的前角达-55°。切削条件很差;切削速度沿切削刃的分配不合理,强度最低的刀尖切削速度最大,所以磨损严重。因此,加工的孔精度低。

(3)钻头主切削刃全刃参加切削,刃上各点的切削速度又不相等,容易形成螺旋形切屑,排屑困难。因此切屑与孔壁挤压摩擦,常常划伤孔壁,加工后的表面粗糙度很低。

网友(3):

标准麻花钻主要由工作部分、颈部和柄部等三部分组成。工作部分担负切削与导向工作 ,柄部是钻头的夹持部分,用于传递扭矩。
麻花钻上的沟槽起排屑的作用.

网友(4):

看看书,上网查,这个很普遍的,不同地方叫法也不同

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