Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

Developing a novel binderless diamond grinding wheel with femtosecond laser ablation and evaluating its performance in grinding soft and brittle materials

“…The grains are in a pyramid shaped similar to the ideal abrasive grains of a conventional grinding wheel. The average size of the grains is approximately 38 μm, which is in accordance with that of the conventional grinding wheel used to correct the optical axis of KDP crystal (Qu et al, 2019). The protrusion height of the grains are approximately 16 μm.…”

“…Two main forms of the SSD are observed. The maximum depth is approximately 30 μm, which is slightly deeper than the maximum depth of the conventional grinding wheel (approximately 20 μm; Qu et al, 2019). Figs.…”

“…Chen et al (2016) proposed a hybrid machining method by combining precision grinding with fly cutting to form the chamfered faces of KDP crystal, improving machining efficiency nearly five times. Qu et al (2019) used a resin-bonded diamond grinding wheel with Ni-P alloy coating on the abrasive grains to remove the surface material of KDP components with high process efficiency and low damage. However, the use of conventional grinding wheels is often constrained by impurities, such as debris from bond materials and lose grains embedded into ground surfaces due to the low hardness of these photoelectric crystals.…”

Design of binderless grinding wheel with positive rake angle and fabrication used femtosecond laser ablation for grinding soft and brittle crystals

“…However, the machining efficiency of typical SPDT process is rather low, and often companied with severe wear issues of the diamond cutters. Recent research works have proved that grinding method is capable to achieve high process efficiency and low damage level for machining these crystal materials [9][10][11], whilst the performance of the grinding tool is crucial to ensure the success of soft crystal grinding. Qu et al use a resin-bonded diamond grinding wheel to remove the surface material of KDP components with high efficiency for fixing the crystal axis [11].…”

“…Recent research works have proved that grinding method is capable to achieve high process efficiency and low damage level for machining these crystal materials [9][10][11], whilst the performance of the grinding tool is crucial to ensure the success of soft crystal grinding. Qu et al use a resin-bonded diamond grinding wheel to remove the surface material of KDP components with high efficiency for fixing the crystal axis [11]. However, impurity embeding and poor ground surface quality are encountered when using the traditional grinding wheels.…”