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从实质上讲,扩孔器是把金刚石镶在圆弧面上的一种环状扩孔钻头,与孔底破碎岩石的钻头配套使用.其作用是保持孔径和增加孔内钻具工作时的稳定性. 扩孔器一向用冷挤压法或电铸法生产,缺点是尺寸难掌握,金刚石包镶不牢,而且金刚石在胎体中分布不均.用热压法制造则难度更大,主要是不好在径向加压,轴向热压时,由于产生塑性流动使含有金刚石的胎体料-起往下移,甚至使本来想固定在表面上的金刚石流到底部或胎体料中去,既达不到扩孔作用又浪费了金刚石.为此我们进行了如何使金刚石在扩孔器上定位和定量的试验研究工作.首先将一定数量的单晶或聚晶
In essence, the reamer is a ring-shaped reaming bit that inserts a diamond into a circular arc and is used with a drill bit that breaks the rock at the bottom of the hole to maintain the aperture and increase the working time of the drill Stability. Reamer has always been cold extrusion or electroforming production, the disadvantage is difficult to grasp the size of the diamond package is not strong, and diamond uneven distribution in the carcass. Hot pressing method is more difficult to create, The main is not good at radial compression, axial hot pressing, as a result of the plastic flow of diamond-containing carcass material - from the down, or even want to be fixed on the surface of the diamond flow to the bottom or the carcass material In both the up and down the role of not only diamond but also wasted.Therefore, we conducted a how to make diamond positioning and quantification in the reaming of experimental research.First, a certain number of single crystal or polycrystalline