The Study On The Industrialized Production Technology Of Tungsten Wire For Exposure Lamp Of High Performance Copier

In order to meet the specific requirements in the special using conditions,the basic requirement on the copier exposure lamp’s tungsten wire are not only the smooth filament surface without obvious cracks and grooves,uniform diameter,but also the good anti-drooping,seismic properties,better anti-seismic performance and excellent anti-current impact.According to the requirements of the exposure tungsten filament of the copier,the factors which influencing the surface quality,high temperature performance,diameter uniformity and crack of the tungsten wire during the pressure processing and electrolytic cleaning course had been studied using theoretical and experimental methods.The manufacturing processes had been improved and new process control standards had been determined also.These products passed the client authentication successfully and had been purchased with bulk quantity.Main research results as follows:(1)The factors influencing the surface quality of the tungsten wire included the burning loss of oxidation annealing,the additive used in the electrolytic cleaning process and the electrolytic power supply had been stydied.The relevant process specifications had been setted.(2)The high temperature performance and the influencing mechanism which effected by the potassium grains inside the tungsten wire had been studied.The influence by the processing temperature and the ratio of the pass compression on high temperature performance had been clarified,and the control codes of the processing temperature and the ratio of the pass compression were determined also.(3)The minitab software were used to improve the uniformity of the diameter.The standard of the pulling speed and annealing temperature on the process of product the 0.20 mm tungsten wire from the 0.39 mm diameter wires had been determined.During its production,The laser diameter measurement feedback system had been developed and used and the diameter uniformity had been improved successfully.(4)The parameters of the relieved-stress annealing had been determined through the cracks propagation during electrolytic cleaning.