In view of the low grinding efficiency of the resin bonded diamond grinding wheel in the grinding diamond composite sheet, the poor dimensional consistency of the processed composite sheet, the large grinding noise, etc., combined with the characteristics of the ceramic bond diamond grinding wheel, the purpose is to develop a diamond grinding wheel. The use of ceramic binders in place of resin binders overcomes these disadvantages.
Its main features and test results are summarized as follows:
1. The high temperature stability test of diamond abrasives was carried out. It was found that when the temperature was higher than 700 °C, the diamond abrasives would undergo oxidation reaction in the air atmosphere, which would damage the diamond abrasives. The degree of thermal damage of diamond abrasives at high temperatures and the grade and particle size of diamond abrasives Relatedly, at the same temperature, the lower the grade and the finer the particle size, the higher the degree of thermal damage to the diamond abrasive; the engineer changed the sintering process to reduce the thermal damage to the diamond abrasive itself at a high temperature of 750 °C. In combination with the thermal stability of diamond abrasives and the characteristics of diamond composite grinding, type II diamond is used as the abrasive for the ceramic diamond grinding wheel and the abrasive grinding wheel of Henan Shengchuang Superhard Material Co., Ltd.
2. According to the thermal stability of the diamond abrasive, the firing temperature of the grinding wheel and the refractoriness range of the bonding agent were determined. The reaction of several oxides at the firing temperature of the grinding wheel and the diamond abrasive was analyzed by using the free energy generation principle of the oxide. The chemical composition of the binder was determined. According to the theory of glass structure, the content of each component in the binder was determined, the binder formulation was determined, and it was suitable for industrial production.
3. The preparation process of the binder. Henan Shengchuang Superhard Materials Co., Ltd. used ceramic smelting method to prepare ceramic binder, determined the process flow of binder preparation, discussed the influence of different heating curves on the properties of smelting binders, and found that only the crystallization water in the binder raw materials and The decomposed material is decomposed at its decomposition temperature and then raised to the smelting temperature, and the obtained binder is stable in performance; the bonding agent is tested for performance, and the smelting binder has low refractoriness (580-630 ° C) and small thermal expansion coefficient (7.2). -8.0~*10~(-6)°C~(-1)), high flexural strength (45-58MPa), strong holding force on diamond abrasive grains, suitable for making ceramic bond diamond grinding wheel for grinding diamond composite sheets.
4. The grinding diamond composite sheet test is carried out, and the life of the processed coalfield geological diamond composite sheet is 1600-2000 pieces; the life of the processed petroleum high performance diamond composite sheet is 1200-1400 pieces. Compared with the resin binder, during the grinding process, it is found that the grinding of the composite sheet mainly removes the excess diamond on the outer circumference of the composite sheet. Since the diamond is very hard, when the resin is ground with a resin bond, the resin is bonded with diamond. In order to ensure the durability of the grinding wheel, the grinding wheel is generally compact and basically free of air holes. Therefore, the grinding force is particularly large during grinding, and the damage to the spindle of the grinding machine is great; and the grinding wheel is not sharp, and the grinding wheel will make the grinding wheel larger. Knife, and squeaking; grinding efficiency is very low. Because the ceramic bond diamond grinding wheel has pores, the self-sharpness of the grinding wheel is very good, and the damage to the spindle of the grinding machine is small; the grinding wheel is sharp and the grinding efficiency is high; when the grinding is not performed, the size of the composite piece is good. In addition, when the composite sheet is ground, the temperature in the grinding zone is high, and the resin is not resistant to high temperature, so the resin will become soft in the grinding zone, the holding strength of the diamond abrasive is lowered, and the grinding wheel is consumed quickly; the ceramic binder does not have this problem. The grinding wheel has little noise during grinding and almost no grinding sound is heard. The advantage of the ceramic bond diamond grinding wheel for grinding the diamond composite sheet is that the grinding efficiency is high, the size of the ground composite sheet is good, the grinding noise is low, and the damage to the spindle of the grinding machine is small.
Its main features and test results are summarized as follows:
1. The high temperature stability test of diamond abrasives was carried out. It was found that when the temperature was higher than 700 °C, the diamond abrasives would undergo oxidation reaction in the air atmosphere, which would damage the diamond abrasives. The degree of thermal damage of diamond abrasives at high temperatures and the grade and particle size of diamond abrasives Relatedly, at the same temperature, the lower the grade and the finer the particle size, the higher the degree of thermal damage to the diamond abrasive; the engineer changed the sintering process to reduce the thermal damage to the diamond abrasive itself at a high temperature of 750 °C. In combination with the thermal stability of diamond abrasives and the characteristics of diamond composite grinding, type II diamond is used as the abrasive for the ceramic diamond grinding wheel and the abrasive grinding wheel of Henan Shengchuang Superhard Material Co., Ltd.
2. According to the thermal stability of the diamond abrasive, the firing temperature of the grinding wheel and the refractoriness range of the bonding agent were determined. The reaction of several oxides at the firing temperature of the grinding wheel and the diamond abrasive was analyzed by using the free energy generation principle of the oxide. The chemical composition of the binder was determined. According to the theory of glass structure, the content of each component in the binder was determined, the binder formulation was determined, and it was suitable for industrial production.
3. The preparation process of the binder. Henan Shengchuang Superhard Materials Co., Ltd. used ceramic smelting method to prepare ceramic binder, determined the process flow of binder preparation, discussed the influence of different heating curves on the properties of smelting binders, and found that only the crystallization water in the binder raw materials and The decomposed material is decomposed at its decomposition temperature and then raised to the smelting temperature, and the obtained binder is stable in performance; the bonding agent is tested for performance, and the smelting binder has low refractoriness (580-630 ° C) and small thermal expansion coefficient (7.2). -8.0~*10~(-6)°C~(-1)), high flexural strength (45-58MPa), strong holding force on diamond abrasive grains, suitable for making ceramic bond diamond grinding wheel for grinding diamond composite sheets.
4. The grinding diamond composite sheet test is carried out, and the life of the processed coalfield geological diamond composite sheet is 1600-2000 pieces; the life of the processed petroleum high performance diamond composite sheet is 1200-1400 pieces. Compared with the resin binder, during the grinding process, it is found that the grinding of the composite sheet mainly removes the excess diamond on the outer circumference of the composite sheet. Since the diamond is very hard, when the resin is ground with a resin bond, the resin is bonded with diamond. In order to ensure the durability of the grinding wheel, the grinding wheel is generally compact and basically free of air holes. Therefore, the grinding force is particularly large during grinding, and the damage to the spindle of the grinding machine is great; and the grinding wheel is not sharp, and the grinding wheel will make the grinding wheel larger. Knife, and squeaking; grinding efficiency is very low. Because the ceramic bond diamond grinding wheel has pores, the self-sharpness of the grinding wheel is very good, and the damage to the spindle of the grinding machine is small; the grinding wheel is sharp and the grinding efficiency is high; when the grinding is not performed, the size of the composite piece is good. In addition, when the composite sheet is ground, the temperature in the grinding zone is high, and the resin is not resistant to high temperature, so the resin will become soft in the grinding zone, the holding strength of the diamond abrasive is lowered, and the grinding wheel is consumed quickly; the ceramic binder does not have this problem. The grinding wheel has little noise during grinding and almost no grinding sound is heard. The advantage of the ceramic bond diamond grinding wheel for grinding the diamond composite sheet is that the grinding efficiency is high, the size of the ground composite sheet is good, the grinding noise is low, and the damage to the spindle of the grinding machine is small.
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