气保焊丝镀铜质量对其防锈性能的影响

分析气体保护焊丝的锈蚀原因及化学镀铜质量对焊丝防锈能力的影响。认为焊丝镀铜层厚度、镀层结合力、镀层稳定性是影响其防锈能力的重要因素。提高镀层厚度可以显著提高焊丝的防锈能力。镀铜层结合力及其稳定性明显影响焊丝的防锈性能,而影响镀铜层结合力及其稳定性的最主要因素是焊丝的镀前表面质量和镀液的性能。使用分子筛型镀液添加剂对提高镀层厚度、镀层结合力及其稳定性都非常有利。

分子筛型添加剂对气保焊丝化学镀铜质量的影响

对气保焊丝的镀铜层质量存在的问题以及分子筛型添加剂的作用进行深入分析,指出焊丝镀铜层质量主要表现在镀铜层厚度、镀层结合力及其稳定性,影响焊丝化学镀铜层结合力及其稳定性的主要因素是焊丝的镀前表面质量和镀液的性能。使用分子筛型镀液添加剂不仅能提高镀层厚度还能提高镀层结合力及其稳定性,因而明显改善焊丝的整体防锈性能。

气保焊丝锈蚀原因分析及提高防锈能力的措施

通过对气体保护焊丝锈蚀原因的分析，认为影响镀铜层厚度、结合力及其稳定性的主要原因是焊丝的镀前表面质量和镀液的性能；确保镀铜前后钢丝表面清洁，控制镀铜层厚度在2．0～5．0μm，采用分子筛型镀液添加剂可以提高焊丝的防锈能力。

Improvement of machining quality of copper-plated roll mold by controlling temperature variation

Micro prism film used in LCD industry can be manufactured by roll to roll method with copper-plated roll mold. As copper-plated roll mold is getting larger, pitch error is getting severer. The pitch error drops the quality of micro prism film. The main cause of the pitch error was investigated during machining large roll mold whose machined length was 1 200 mm. The temperature of machining system was elevated during machining roll mold, and this elevation induced thermal expansion of the system. The temperature variation around the roll mold also made thermal expansion of the roll mold. The amount of thermal expansion had strong relationship to the amount of pitch error. Therefore, the roll mold was machined after warming-up of machining system and precise temperature controller around copper-plated roll mold was installed, which minimized the temperature variation. Finally, precise micro prism patterns without pitch error were machined on the large roll mold.