为了增强玻璃质材料的表面强度,研究了表面强度变化的主要工艺阶段,根据所得表面强度值绘出了工艺变化曲线.分析了表面强度降低的主要原因,提出了相应的解决办法.阐述了用腐蚀法去除应力集中及最大压应力增强玻璃表面强度的理论,并分析了不同去除模式对脆性材料表面强度的影响.最后,介绍了柔性研磨方式,给出柔性研磨方式的工艺控制条件.总结出不同非成像表面相应粗糙度基本要求,并提出了相应的加工工艺办法.实验结果表明,应用去除速率≤25μm/h及磨料粒度≤15μm的柔性研磨可以得到类似抛光的表面.柔性研磨方式使表面最大压应力增大,并能够避免危害表面强质的纵向显微裂纹产生,从而提高玻璃的表面强度.%This paper studied how to improve the glass surface strength. The manufacture process in which the surface strength of glass changes was explored. According to the values of surface strength variation and the strength curves under different grinding processes, the reasons that the surface strength decreased and the related measures were given. Then, the etching method for releasing stress concentration and the max surface compressive stress strengthening theory were described, and the effects of different material removal modes on the surface strength of brittle materials were analyzed. A ductile grinding mode was introduced and its main manufacture requirements were given. The roughness ranges for different non-imaging surfaces were summarized, and corresponding solutions were advanced. The experiments show that as the material removal rate is set to be less than or equal to 25μm/h and the abrasive size less than or equal to 15μm, the polishing-similar surface will be a-chieved for several materials. The ductile grinding can induce an increase of the max surface compres-sive stress and avoid longitudinal micro-cracks which reduce the glass surface strength, so it is a reasonable grinding mode for glass surface strength improvement.
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