The geometry of the segment is also one of the important factors that determine the cutting performance of the diamond saw blade. The different shapes of the segments used directly affect the sawing efficiency and the proportion of abnormal diamond failures. The shape structures of the currently used segments include ordinary convex segments, layered "sandwich" type concave segments, "L" type segments, stepped segments, segmented segments and side-slotted segments, etc. The shape and structure of the segment are designed to improve the chip tolerance, chip removal capability and cooling and lubrication effect of the diamond segment in the sawing arc area, reduce the friction between the segment and the stone and sawdust, and improve the rock-breaking ability of the diamond, thereby reducing the energy consumption and improve the performance of the saw blade. The initial diamond circular saw blade segment adopts a uniform rectangular structure. After sawing for a period of time, it is found that the edges on both sides are more easily worn than the middle, and the segment will become convex in the cross-sectional direction. The contact area of the stone increases, and the diamond is easy to blunt. In actual processing, a highly abrasive material is often required for cutting. In addition, due to the increased sawing force, the saw blade substrate is prone to distorting and vibration deformation, resulting in uneven thickness of the processed sheet and reducing the number of repeated use of the substrate. The invention of the layered concave segment largely solves the problems that occur in the sawing of ordinary segments. The concave block can generally be realized by the following methods:
1.The diamond concentration in the outer layer binder is higher than that in the middle layer.
2. The outer layer bond is more wear-resistant than the middle layer.
3. The diamond grade in the outer layer is higher than that in the middle layer.
4. Through structural design, the working length of the middle layer is shorter than that of the outer layer, such as "back" shape, "H" shape or other forms of middle slot.
5. Add a non-working layer to a multi-layer structure, and adjust the width ratio of the working layer and the non-working layer.
