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The reason why diamond segment are designed into different shapes
Publish Date:2020-03-10
The geometric shape of diamond segment is also one of the important factors that determine the cutting performance of diamond saw blade. Different shapes of segments directly affect the sawing efficiency and the ratio of diamond abnormal failure. At present, the adopted nodal shape structure includes ordinary medium convex nodal block, layered "sandwich" medium concave nodal block, L-shaped nodal block, stepped nodal block, segmented nodal block and side slotted nodal block, as shown in the figure below respectively. The shape and structure of diamond segments are designed to improve the capacity of chip holding, chip removing, cooling and lubrication of diamond segments in the sawing arc area, reduce the friction between diamond segments, stone materials and sawdust, improve the rock breaking ability of diamond, so as to reduce energy consumption and improve the performance of saw blade. The first diamond circular saw segment adopts a uniform rectangular structure, which will start after sawing for a period of time The edges of Rui's two sides are easier to wear than the middle. In the cross-section direction, the nodal block will become convex shape, the working surface of the nodal block and the stone area will increase, and the diamond is easy to be blunt. In the actual processing, it is often necessary to use abrasive materials for cutting. In addition, due to the increase of cutting force, diamond is easy to be blunt. In practical processing, it is often necessary to use abrasive materials for cutting. In addition, due to the increase of sawing force, the saw blade matrix is prone to generate bending and vibration deformation, resulting in uneven thickness of the processed plate and repeated use of the matrix. To a great extent, the invention of layered medium concave segment solves the problems in sawing ordinary segments. The concave joint block can be realized by the following methods:1. The concentration of diamond in the outer layer is higher than that in the middle layer;
2;the outer binder is more endurable than the middle one.
3. The grade of diamond in the outer layer is higher than that in the middle layer;
4. The working length of the middle layer is shorter than that of the outer layer through structural design, such as "back" type, "H" type or other forms of middle slotting;
5. Add non working layer in multi-layer structure and adjust the width ratio of working layer and non working layer.
Because of the existence of intermittent flume around the saw blade, the length of the segment also affects the performance of the saw blade. Some scholars have discussed the design and influence of the length of the segment from the theoretical and experimental perspectives. During sawing, the load of diamond grains on the front end of the segment which is advanced into the sawing arc area is larger than that on the back end. According to different segment bearing models, appropriate segments can be designed to match the performance of the front and rear ends of the segment with the load.
In a word, at present, from the selection of diamond and binder to the design of nodal shape and parameters, it is more based on experience rather than strict theoretical basis.
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