The performance of select technologies for direct part marking (DPM) are reviewed. The select DPM technologies are those that can be cost-effectively used for unique identification (UDI) of a wide variety of part shapes, sizes, and materials by applying a permanent 2D Data Matrix. The select technologies are also flexible in being practicable for use in a wide range of production systems in terms of part variety and volume. It is concluded from this review that the most common and chronic causes of non-conforming quality relate to marginal differences in optical contrast between the cell and substrate surface representing the opposite binary data states. The other concern identified is the potential for undermining the performance of parts operating in demanding environments, in particular reducing component fatigue life due to the surface modifications produced by DPM.

A new solution based on the principle of “engineering the surface” is then described, and results are reported for measurements of standard Data Matrix quality parameters as set out in the ISO/IEC TR 29158:2011 standard. These results and other performance measures are critically reviewed and compared with alternative DPM technologies. It is shown that the proposed solution obtains the highest possible grades for the main ISO quality parameters including “cell contrast” levels which exceed 70%. The technology is also characterised by having a minimal impact on surface finish and integrity, no material removal, no use of coolant or any source of contamination, low tool wear rates and exacting levels of control of the core process mechanisms.

审查了直接零件标记（DPM）所选技术的性能。精选的DPM技术可以通过应用永久性2D数据矩阵，经济高效地用于对各种零件形状，尺寸和材料进行唯一标识（UDI）。选择的技术在零件种类和数量方面可灵活应用于各种生产系统。从本综述得出结论，不合格质量的最常见和长期原因与代表相反二进制数据状态​​的单元和基底表面之间光学对比度的边际差异有关。所确定的另一个问题是可能破坏在苛刻环境中运行的零件的性能，

然后介绍了一种基于“工程表面”原理的新解决方案，并报告了测量结果的结果，这些结果用于测量标准数据矩阵质量参数，如ISO / IEC TR 29158：2011标准所述。我们严格审查了这些结果和其他性能指标，并与其他DPM技术进行了比较。结果表明，所提出的解决方案对于主要的ISO质量参数（包括超过70％的“单元对比”水平）获得了最高的评分。该技术的特征还在于对表面光洁度和完整性的影响最小，不去除材料，不使用冷却剂或任何污染源，工具磨损率低，并且对核心工艺机制的控制水平严格。