Application of water-soluble pore-forming agent in ultra-thin resin cutting grinding wheel
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摘要: 为进一步提升超薄树脂切割砂轮的自锐性能和排屑容屑能力，在切割砂轮中加入水溶性造孔剂NaCl，研究其含量对超薄树脂切割砂轮的微观形貌、力学性能及切割性能的影响。结果表明：当造孔剂添加体积分数为10%时，砂轮中的孔隙均匀适中，其切割效率最高，进给速度最高可达20 mm/s。但加入造孔剂会对砂轮的抗折性能和切割寿命产生一定影响，造孔剂含量越高，抗折性能越低，切割寿命越短。Abstract: In order to further improve the self sharpening performance, the chip removal and the chip holding capacity of the ultra-thin resin cutting grinding wheel, the water-soluble pore-forming agent NaCl was added into the cutting grinding wheel, and the effects of its content on the micro morphology, the mechanical property and the cutting property of the ultra-thin resin cutting grinding wheel were studied. The results show that when the volume fraction of pore-forming agent is 10%, the pores in the grinding wheel are uniform and moderate, the cutting efficiency is the highest and the maximum feed speed can reach 20 mm/s. However, the addition of pore-forming agent will have a certain impact on the flexural performance and the cutting life of the grinding wheel. The higher the content of pore-forming agent, the lower the flexural performance and the shorter the cutting life.
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Key words:
- pore-forming agent /
- resin bond /
- ultra-thin grinding wheel /
- superhard material
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图 1 超薄树脂切割砂轮结块SEM形貌
Figure 1. SEM morphology of agglomeration of ultra-thin resin cutting grinding wheel
图 4 不同样条及NaCl造孔剂的SEM形貌
Figure 4. SEM morphologies of different strips and NaCl pore-forming agent
图 8 不同进给速度下5种砂轮样品的主轴电流
Figure 8. Spindle currents of five kinds of grinding wheel samples at different feed speeds
表 1 试验样条配方
Table 1. Test spline formula
编号 酚醛树脂
体积分数
Vb / %白刚玉
体积分数
VA / %石墨
体积分数
VC / %金刚石
体积分数
Vd / %造孔剂
体积分数
Vp / %1# 55 5 5 35 0 2# 50 5 5 35 5 3# 45 5 5 35 10 4# 40 5 5 35 15 5# 35 5 5 35 20 
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表 2 切割砂轮切削齿的高度差
Table 2. Height differences of cutting teeth of cutting wheels
砂轮
编号第1次
Δh1 / mm第2次
Δh2 / mm第3次
Δh3 / mm第4次
Δh4 / mm第5次
Δh5 / mm第6次
Δh6 / mm平均值
Δh / mm6# 0.020 0.018 0.022 0.025 0.021 0.025 0.022 7# 0.024 0.022 0.022 0.024 0.021 0.027 0.023 8# 0.020 0.030 0.026 0.025 0.025 0.032 0.026 9# 0.031 0.033 0.025 0.031 0.027 0.032 0.030 10# 0.036 0.028 0.033 0.034 0.035 0.038 0.034
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