Abstract In the manufacturing of metal zippers, including several complicated forming and shearing process steps, the tool wear is a limiting factor, since it deteriorates the quality of the zipper elements. Hence, an increased understanding of the tool wear mechanisms occurring in the zipper production is important to prolong the tool life. To gain deeper insights into the tool wear mechanisms active in the process of shearing Cu alloy wire into separate zipper elements, the present study utilizes a simplified sliding test rig. The rig comprises a small tool material cylinder sliding against a large rotating work material cylinder, in a crossed cylinders configuration. One uncoated and two PVD-coated cemented carbide cylinders were tested under contact conditions similar to those of the actual shearing. The tool material cylinder was analyzed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) at selected intervals during the test. The surface appearance was investigated and compared with observations on tools used in actual zipper production. The degradation was found to include gradual wear against the Cu alloy, transfer of the Cu alloy and characteristic modifications of the topography, indicative of wear mechanisms operating at a very small scale, confirming that the wear of the shearing tools can be mimicked by the test.

中文翻译：

---

用于加工铜基材料的无涂层和 PVD ​​涂层硬质合金刀具的磨损第 I 部分：干燥和润滑滑动中的实验室测试验证

摘要 在金属拉链的制造中，包括几个复杂的成型和剪切工艺步骤，工具磨损是一个限制因素，因为它会降低拉链元件的质量。因此，深入了解拉链生产中出现的工具磨损机制对于延长工具寿命非常重要。为了更深入地了解在将铜合金线剪切成单独的拉链元件的过程中活跃的工具磨损机制，本研究使用了一个简化的滑动试验台。该钻机包括一个小的工具材料圆柱体，它以交叉圆柱体的配置靠着一个大的旋转工作材料圆柱体滑动。在与实际剪切的接触条件相似的接触条件下测试了一个未涂层和两个 PVD ​​涂层硬质合金圆柱体。在测试过程中以选定的时间间隔通过扫描电子显微镜 (SEM) 和能量色散 X 射线光谱 (EDS) 分析工具材料圆柱体。对表面外观进行了调查，并与实际拉链生产中使用的工具的观察结果进行了比较。发现退化包括对 Cu 合金的逐渐磨损、Cu 合金的转移和形貌的特征改变，表明磨损机制在很小的范围内运行，证实可以通过测试模拟剪切工具的磨损.