Introduction In sheet metal fabrication, distortion caused by welding and warping are unavoidable challenges. Even when manufacturing strictly to design drawings, it is not uncommon for the finished product to warp, making assembly difficult. So why does such deformation occur when welding? This article explains the causes, mechanisms, and countermeasures in detail. 1. The effect of heat generated during welding Welding is a method of joining metals by locally melting them using a heat source...

Introduction During winter, we have all experienced touching a metal handrail and feeling a more intense coldness than when touching a wooden one, despite the same external temperature. This everyday phenomenon serves as an excellent example, clearly illustrating the fundamental principles of mold cooling design in injection molding. In injection molding, “cooling” significantly influences quality factors such as the molding cycle, dimensional accuracy, warpage, sink marks, and internal...

When insufficient strength becomes an issue in product design, designers consider various reinforcement measures. One representative technique is the addition of “ribs” (reinforcing members). Ribs are an extremely effective design element for achieving both weight reduction and strength assurance, as they can enhance rigidity with relatively little additional material. However, the term “rib” encompasses a wide variety of shapes, including triangular, square, hexagonal (honeycomb), and...