In this paper, describe the fabrication of high strength punch molds that can be applied to ultra-high strength sheet materials after processing. A method for improving the strength of the punching die by additive manufacturing (AM) of a high strength powder material using a metal 3D printer was proposed. Furthermore, a semi-additive technique was proposed to increase the punch strength through partial AM of specific parts of the punch that require high strength. A preprocessing process for predicting the semi-additive shape for the punch function portion is proposed for application of the AM technology of a metal 3D printer to this semi-additive technique. The preprocessing for determining the semi-additive shape consists of the predicting step of the punch strength based on the shear process of the sheet material, analyzing step the stress distribution of the punch, defining step the semi-additive range, designing step the semi-additive shape, and verifying step the additive interface strength. Based on this simulation, the range of shapes for the semi-additive was 1.21 mm and 2.62 mm for sheet material CP1180 and 1.3 mm and 3.2 mm for sheet material 22MnB5. The shape and range determined in the simulation process defines a semi-additive area (volume) for the 3D printing AM technique using a high-strength powder material, and a semi-additive punch was manufactured according to the defined area. The semi-additive punch (HWS powder material) fabricated in this study was performed a durability test for validity verification in the piercing process of high-strength sheet material (CR980). This validation test compared the state of the punch after 1000 piercing processes with a typical cold piercing punch (SKD11 solid material). From this test, the feasibility of the semi-additive punch was confirmed by showing a similar state of scratches and abrasion from the two punches. The simulation analysis processor for the additive shape and the additive range prediction for the semi-additive punch manufacturing presented in this paper can be useful for the additive manufacture of cutting and trimming punch mold.

在本文中，描述了可在加工后应用于超高强度板材的高强度冲模的制造。提出了一种通过使用金属3D打印机对高强度粉末材料进行增材制造（AM）来提高冲压模强度的方法。此外，提出了一种半添加技术以通过需要高强度的冲头的特定部分的局部AM来增加冲头强度。为了将金属3D打印机的AM技术应用于该半添加技术，提出了一种用于预测冲压功能部分的半添加形状的预处理过程。确定半加成形状的预处理包括基于板材的剪切过程的冲压强度的预测步骤，分析步骤：冲头的应力分布；定义步骤：半添加范围；设计步骤：半添加形状；验证步骤：添加界面强度。基于该模拟，片状材料CP1180的半添加剂的形状范围为1.21mm和2.62mm，片状材料22MnB5的形状范围为1.3mm和3.2mm。在模拟过程中确定的形状和范围定义了使用高强度粉末材料的3D打印AM技术的半添加区域（体积），并根据定义的区域制造了半添加冲头。在这项研究中制造的半加料冲头（HWS粉末材料）进行了耐久性测试，以验证高强度板材（CR980）的穿孔过程中的有效性。该验证测试将1000次穿孔后的冲头状态与典型的冷穿孔冲头（SKD11固体材料）进行了比较。从该测试中，通过显示两个冲头的类似刮擦和磨损状态，证实了半添加冲头的可行性。本文介绍的半添加冲头制造的添加剂形状和添加范围预测的仿真分析处理器可用于切削和修整冲头模具的添加制造。