研究目的
To achieve a considerable reduction in surface roughness on glass optical components using a multistage abrasive slurry jet polishing concept by changing process parameters such as impact angle, traverse speed, and abrasive particle type and size after the first stage of polishing to overcome saturation limits.
研究成果
The multistage polishing concept effectively reduces surface roughness in glass by altering parameters after saturation. Optimal conditions include a 30° impact angle, 3 mm/min traverse speed, and using large Al2O3 particles initially followed by smaller ones. This strategy mitigates saturation and achieves smooth surfaces, demonstrating its viability for optical component finishing.
研究不足
The study is limited to BK7 glass and specific abrasive types and sizes; results may not generalize to other materials or conditions. The exposure time per area is lower due to nozzle traversal, potentially affecting comparison with spot polishing studies. Saturation in surface roughness reduction was observed, indicating constraints in further improvement without parameter changes.
1：Experimental Design and Method Selection:
The study employed a multistage polishing approach using an abrasive slurry jet polishing setup. Experiments were designed to vary parameters like impact angle, traverse speed, particle size, and abrasive type across three polishing stages based on preliminary tests to investigate surface roughness reduction.
2：Sample Selection and Data Sources:
BK7 glass samples of 30 mm diameter and 8 mm thickness were used as the workpiece material. Surface roughness was measured at three different areas on each sample after each polishing stage.
3：List of Experimental Equipment and Materials:
Equipment included an abrasive slurry pump (Wilden Pro-Flo Series AODD Pump), linear drive unit (EMJ-04APB22, Anaheim Automation), rotary drive unit (D90 series PMDC motor, Dynaflux), stainless steel nozzle (2 mm exit diameter), surface roughness measurement unit (Mahrsurf XR 20 GD25), and High Resolution SEM (HRSEM - FEI INSPECTF50). Materials included Al2O3 and CeO2 abrasive particles of sizes 0.5 μm and 1 μm, and slurry with 10% concentration by weight.
4：0). Materials included Al2O3 and CeO2 abrasive particles of sizes 5 μm and 1 μm, and slurry with 10% concentration by weight.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The abrasive slurry was pumped through the nozzle at an oblique angle to the rotating workpiece. The nozzle traversed linearly over the surface. Parameters were changed after the first stage (20 minutes polishing), and surface roughness was measured after each stage. SEM analyses were conducted to observe surface texture changes.
5：Data Analysis Methods:
Surface roughness (Ra) was measured using a contact-type unit with specified lengths and resolutions. Percentage reduction in Ra was calculated, and SEM images were analyzed qualitatively to understand material removal mechanisms.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
