Issues with laser cutting machines in medium- and thick-plate processing
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2020-09-10
1. Carbon Steel Thick Plate Piercing Issue
In thick-plate processing, the piercing phase accounts for a significant portion of the overall time. As a result, laser manufacturers have been actively developing rapid piercing technologies. Among these, the high-energy piercing method—commonly known as "blast piercing"—stands out as particularly representative. This technique offers the advantage of exceptional speed (about 1 second—for example, with a 16mm plate—same applies below), but it also has notable drawbacks: not only does it limit the ability to process small-shaped components, but the massive energy injected during piercing also raises the plate’s temperature, potentially disrupting the subsequent cutting process. On the other hand, using low-power pulsed lasers for piercing results in much longer cycle times (up to 12 seconds), which can significantly reduce cutting efficiency and drive up per-unit costs.
2. Cutting surface quality issues
When processing thick plates, imperfect cut surfaces are often encountered. Such cuts not only raise concerns about the quality of the final product but also frequently lead to overheating and severe slag adhesion, ultimately diminishing the value that high-priced laser cutting machines offer compared to other cutting methods.
3. Stability Issues in Full-Board Processing
In the full-plate processing of domestically produced steel materials, localized areas often experience poor machining quality. This phenomenon can sometimes occur unpredictably—appearing even when the processing machine is in excellent condition. Such unexpected failures significantly disrupt the overall workflow as they require extra time to address and sort out defective parts. To tackle this issue, this article provides the author's analysis of the underlying causes behind these unexplained machining failures, along with several proposed countermeasures.
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