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孔加工比重在机械行业中一般占25～30％,而长径比L/D>6的孔约占5％,其中孔径在φ20mm以下的超过一半。这一部分就是枪钻的传统加工范围。枪钻(图1)一开始就是以它能钻出笔直而正圆的深孔(枪管孔)而应用于军火工业。这一显著优点,使它超出了仅只加工枪炮孔的范围,使用面越来越广。在油泵油嘴行业的精密偶件,液压元件中的阀体、阀套,汽车行业的汽门导管,连杆螺栓孔等精密浅孔的加工也得以使用。尤其随着新
The proportion of hole processing in the machinery industry generally accounts for 25 to 30%, while the aspect ratio L / D> 6 hole accounts for about 5%, of which pore size in more than half of φ20mm below. This part is the traditional range of gun drilling. The gun drill (Figure 1) was initially applied to the munitions industry for its ability to drill straight, perfectly rounded deep holes (barrel holes). This significant advantage, it is only beyond the scope of processing gun hole, the use of more and more widely. In the oil nozzle industry precision parts, hydraulic components in the body, the valve sleeve, the automotive industry, the valve guide, connecting rod bolt holes and other precision shallow hole processing can also be used. Especially with new