图示为钻削有机玻璃工件的钻头,它与一般钻头不同,其主要特点是: 1.对称于钻头中心线的螺旋槽斜角为15°,以利排屑。 2.切削的锥体角为92°,a=10°,γ =15°,并改变了钻头截面形状。 3为了减少钻头在孔里的磨擦,将钻头磨成0.03/100毫米的锥度。 4.钻头上车有螺纹,并套以孔深定 The figure shows a drill bit for drilling plexiglass workpieces, which is different from the general drill bit. The main features are: 1. The bevel angle of the spiral groove symmetrical to the center line of the drill bit is 15 ° to facilitate chip removal. 2. Cutting cone angle of 92 °, a = 10 °, γ = 15 °, and changed the bit cross-sectional shape. 3 To reduce the friction of the bit in the hole, grind the bit to a taper of 0.03 / 100 mm. 4. Drill bit thread on the car, and set the hole deep set