郭宇

[摘    要]与传统切割方法相比，激光切割具有明显的优势。激光切割采用非接触加工技术，切割精度高，缝窄效果明显。在当前的工业形

势下，激光切割的优势已经得到了广泛的认可，国内的钣金行业在多年的发展过程中不断地改进了对加工材料的切割工艺，大大提高了生产效率，此外还表现出降低生产成本和提高切割质量的优势。随着制造业的进一步发展，对激光切割质量的要求越来越高，而切割后的质量检测无法满足客户及时止损、尽早干预的需求。因此，智能化过程监控成为首选解决方案，在切割前穿孔和切割中进行监测，并将信号实时反馈，确保稳定生产和较高的切割质量。

[关键词]激光切割;穿孔监测;切割中监测;切割解决方案

[中图分类号]U466;TG485 [文献标志码]A [文章编号]2095–6487（2021）05–000–04

Application of Perforation Monitoring in Laser Cutting

Guo Yu

[Abstract]Compared with traditional cutting methods， laser cutting has obvious advantages. Laser cutting adopts non-contact technology， with high cutting precision and obvious narrow seam effect. In the current industrial situation， the advantages of laser cutting have been widely recognized. The domestic sheet metal industry has continuously improved the cutting process of processing materials in the development process of many years， greatly improving the production efficiency. In addition， it also shows the advantages of reducing production costs and improving the cutting quality. However， with the further development of the manufacturing industry， the requirements for the quality of laser cutting are higher and higher， and the quality detection after cutting can not meet the needs of customers' timely stop loss and early intervention. Therefore， intelligent process monitoring has become the preferred solution， monitoring before and during cutting， real-time signal feedback to ensure stable production and high cutting quality.

[Keywords]laser cutting; Perforation monitoring; monitoring during cutting; cutting solutions

一套完整的激光切割系统，不仅包括硬件设备、软件控制，而且生产过程监测（穿孔、切割过程监测）也极其关键。目前穿孔按照其加工特性可分为脉冲穿孔和爆破穿孔。在实际生产中，无论哪种穿孔方式都会受到以下因素的影响：焦点位置、气体压力、气体纯度、喷嘴间距、激光功率和材料质量等。这些参数往往是造成突发问题的原因，如果不能可靠地监测到穿孔结束，光学元件可能会损坏，并影响之后的切割过程。因此，穿孔监测技术（Laser PierceTec，LPT）应运而生，实现了激光切割过程中快速、干净和可复现的穿孔。该技术不仅监控穿孔过程，还可以控制穿孔过程，从而获得均匀、稳定的穿孔和表面质量，使整个穿孔过程中形成的材料飞溅明显减少。……