This paper presents the design of an automatic circumferential chamfering device that processes the inner and outer diameter corners of centrifugal cast pipes after cutting. These large, heavy pipes (dimensions: 389 mm x 5700 mm x 36 mm; weight: 1,200 kg) are produced using the centrifugal casting method. Following manufacturing, the pipes undergo several post-processing operations, including washing, grinding, cutting, and chamfering. Traditionally, circumferential chamfering has been performed manually by workers using grinders. In this study, we conceptualized an automatic circumferential chamfering device specifically designed to chamfer the corners of large centrifugal cast pipes. A structural analysis was conducted to ensure the design's safety, yielding a safety factor greater than two. Based on these design outcomes, we manufactured the chamfering device and conducted characteristic experiments on a large centrifugal cast pipe. The results confirmed that the cylindrical chamfering device can safely and effectively chamfer the inner and outer diameters of large centrifugal cast pipes.
