Motion analysis of progressive/transfer die stamping for cycle time reduction

长期技术服务公司是一家独立的咨询公司，与模具制造商密切合作，使用西门子NX CAD/CAM/CAE软件来提高他们的生产率。该公司最近开发了一个附加软件工具，与现有的NX级进模具向导相结合。该附加软件工具允许通过计算机模拟来验证由NX级进模向导建模的级进模或转移模。这显著减少了使用物理原型的验证时间。尽管如此，仍需进一步发展，以提高整体工艺效率。特别是，由于板材和冲压模具之间的碰撞显然不是可取的，因此经常采用过于保守的板材进给速度。由于连续冲压作业的复杂性，确定最优进给速度是非常具有挑战性的。该项目将开发一个新的运动分析模块，作为现有软件工具的一部分，以最大限度地提高板材的进给速度 库存的明确目标是减少整体级进/转移模具冲压周期时间。 该项目旨在通过运动学分析和仿真来提高级进/转移模冲压的效率和可靠性。首先要建立冲压机的运动学模型及其所有设计的工装和进给机构。然后用它来分析和模拟板料沿连续冲压工位的移动。特别是对冲压机冲压行程与送料机构连续运动的协调进行了详细的分析和优化，以缩短周期时间。增强的软件工具将直接使长期技术服务公司以及加拿大的模具和模具制造商受益。加拿大有相当大的汽车冲压业。因此，未来的发展将具有巨大的经济潜力 这将产生重大影响，必将有助于加拿大制造商在全球范围内竞争。

Longterm Technology Services Inc. is an independent consulting firm that works closely with the die/mold and tooling manufacturers to use the Siemens NX CAD/CAM/CAE software to improve their productivity. The company recently created an add-on software tool to couple with the existing NX Progressive Die Wizard. The add-on software tool allows the progressive or transfer die modeled by the NX Progressive Die Wizard to be validated via computer simulation. This significantly reduces the validation time using physical prototypes. Nonetheless, further development is still needed to improve the overall process efficiency. In particular, as collision between the sheet metal stock and the stamping tooling is clearly not preferable, overly conservative feeding speed of the sheet metal stock is often employed. Due to the complexity of the successive stamping operations, it is very challenging to identify the optimal feeding speed. A new motion analysis module as part of the existing software tool will be developed in this project to maximize the feeding speed of the sheet metal stock with the explicit objective to reduce the overall progressive/transfer die stamping cycle time. The proposed project aims to improve the efficiency and ensure the reliability of progressive/transfer die stamping via kinematic motion analysis and simulation. A kinematic model of the stamping press with all of its designed tooling and feeding mechanism is to be constructed first. It is then used to analyze and simulate the movement of the sheet metal stock along the successive stamping stations. In particular, the coordination of the stamping stroke of the stamping press and the continual motion of the feeding mechanism is to be analyzed in detail and optimized for cycle time reduction. The enhanced software tool will directly benefit Longterm Technology Service as well as the Canadian die/mold and tooling manufacturers. Canada has a sizable automobile stamping industry. The prospective development will thus have a huge potential economic impact and will definitely help the Canadian manufacturers to compete globally.