Assembly planning is the core of automating product assembly, maintenance, and recycling for modern industrial manufacturing. Despite its importance and long history of research, planning for mechanical assemblies when given the final assembled state remains a challenging problem. This is due to the complexity of dealing with arbitrary 3D shapes and the highly constrained motion required for real-world assemblies. In this work, we propose a novel method to efficiently plan physically plausible assembly motion and sequences for real-world assemblies. Our method leverages the assembly-by-disassembly principle and physics-based simulation to efficiently explore a reduced search space. To evaluate the generality of our method, we define a large-scale dataset consisting of thousands of physically valid industrial assemblies with a variety of assembly motions required. Our experiments on this new benchmark demonstrate we achieve a state-of-the-art success rate and the highest computational efficiency compared to other baseline algorithms. Our method also generalizes to rotational assemblies (e.g., screws and puzzles) and solves 80-part assemblies within several minutes.

构建复杂三维（3D）塑料部件上的精确微纳米金属图案允许制造用于先进应用的功能装置。但是，这种图案目前是昂贵的，需要具有长制造时间的复杂过程。本作者演示了一种用任意复杂的形状制造微纳米3D金属塑料复合结构的方法。在这种方法中，修饰光固化树脂以制备能够允许随后的化学镀（ELP）的活性前体。新开发了一种多材料数字光处理3D打印机，以使含有由标准树脂或彼此嵌套的标准树脂或有源前体树脂制成的区域的部件的制造。这些部件的选择性3D ELP处理提供了各种金属塑料复合部件，其具有复杂的中空微纳米结构，其尺寸小于40μm的尺寸规模特定的拓扑关系。使用这种技术，可以通过传统方法制造的3D金属拓扑，并且可以在塑料部件内产生金属图案作为进一步小型化电子设备的装置。所提出的方法还可以产生具有改善金属粘附到塑料基材的金属涂层。基于该技术，设计并制造了由不同功能性非金属材料和特定金属图案组成的几种传感器。本结果证明了该方法的可行性，并提出了智能3D微纳米电子，3D可穿戴设备，微/纳米传感器和医疗保健领域的潜在应用。