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公开(公告)号：WO2017187329A1
公开(公告)日：2017-11-02
申请号：PCT/IB2017/052357
申请日：2017-04-25
摘要： A combined drilling-taping tool for chipless thermoplastic extrusion forming, calibration and tapping of a hole with a neck in thin metal sheets was created. An economic effect is achieved by forming and tapping holes using the proposed combined tool, because the inter-operational time related to the tool changing and setting new forming regimes, furthermore, after the tapping, the sharp-edged collar, which occurs on the top of the workpiece after the drilling, is compressed, therefore an additional mechanical operation for its removal is avoided. The combined drilling-taping tool comprises of seven parts the first five of them are of a rounded polygonal cross-section, which gradually transit from one to another: the cone (1) for forming a centring hole in the workpiece; the cone (2) for hole forming by gradually penetrating the metal; the cylinder (3) for hole and neck calibration until the required diameter for tapping is achieved; the conical thread (4) having not less than 2-3 turns for gradual pilot tapping until the nominal thread diameter is achieved; the cylindrical thread (5) for finishing the chipless tapping of the thread; the cylindrical shoulder (6) of a circular cross-section with a diameter not less than the compressed sharp-edged collar for compressing the sharp-edged collar, the shank (7) for mounting the tool in a collet.
摘要翻译：
创建了一种用于无薄片热塑性挤压成形，校准和轻薄薄金属片颈部孔的攻丝工具的组合式钻孔工具。 通过使用所提出的组合工具形成和攻丝孔来实现经济效果，因为与工具更换和设定新的成形机制有关的操作间时间，此外，在攻丝之后，顶部出现的尖锐边缘 钻孔后的工件被压缩，因此避免了用于其移除的附加机械操作。 该组合的钻具包括七个部分，其中前五个具有圆形的多边形横截面，逐渐地从一个转移到另一个：锥体（1），用于在工件中形成定心孔; 锥体（2）通过逐渐穿透金属而形成孔; 用于孔和颈部校准的圆柱体（3），直到达到所需的攻丝直径; 锥形螺纹（4）具有不少于2-3匝的锥度，用于逐渐引导攻丝直至达到公称螺纹直径; 圆柱形螺纹（5），用于完成螺纹的无芯片螺纹; 圆形横截面的圆柱形肩部（6）的直径不小于压缩锋利边缘的压缩锋利边缘的轴环（7），用于将工具安装在夹头中。
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