TP2铜管精整工序喷墨质量不良原因分析及改进措施初探

在精密铜管精整复绕工序中，涡流探伤装置检测到伤点后会向喷墨装置发送信号，以对铜管表面缺陷进行喷墨标记，但是该过程普遍存在喷墨不良，严重影响了对缺陷的判断。本文介绍了TP2铜管生产线中涡流探伤仪器的工作原理，对原有的涡流探伤仪器、喷墨装置以及喷枪结构进行调研，分析了原有喷墨装置喷墨时存在的漏墨和拖墨问题，探讨了等离子技术与激光刻蚀技术作为喷墨技术替代方案的可能性。文献调研、现有技术分析及其他替代试验的结果表明，采用等离子体表面处理技术对已喷墨铜管进行处理后，可以一定程度地改善铜管拖墨的问题；采用功率为300 W的激光对铜管表面进行刻蚀处理，激光头速度分别为80 mm/s和200 mm/s时，对铜管表面刻蚀呈现出的不同效果，均能够进行缺陷的有效标识。因此，铜管表面激光刻蚀技术可以作为喷墨技术的替代方案。

Cause Analysis and Preliminary Exploration of Improvement Measures for Poor Inkjet Quality of TP2 Copper Tube under Finishing Process

In the finishing process of the precision copper tube, the inspection device of eddy current will send the signal to the inkjet device after detecting the damage point and mark the surface defects of the copper tube. However, this process generally suffers from poor inkjet quality, which seriously affects the judgment of defects and the quality of copper tube products. This article introduces the working principle of the defect detection instruments of eddy current in the TP2 copper tube production, investigates and analyzes the existing defect detection instruments of eddy current, inkjet devices, and the structure of the spray gun on the production line. Meanwhile, it points out the ink leakage and dragging problems in inkjet production and explores the possibility of the plasma processing and laser etching technology as the alternative solutions to inkjet technology. The results of the literature research, the existing technology analysis, and other alternative experiments indicate that the use of plasma surface treatment technology to treat inked copper tubes can improve the problem of ink dragging to a certain extent. Using a laser with a power of 300 W to etch the surface of copper tubes, the laser head speeds of 80 mm/s and 200 mm/s show different effects on the etching of copper tube surfaces, both of which can effectively identify defects. Laser etching technology on copper tube surfaces can be a possible alternative to inkjet technology.