Revolutionizing the Sheet Metal Forming Industry: Introducing Positive Incremental Sheet Forming with Nylon Sleeve Bushes

Sheet metal forming is a critical process in the manufacturing industry, with applications ranging from automobile parts to aerospace components. In recent years, incremental sheet forming has emerged as a promising alternative to conventional sheet metal forming techniques. This process offers numerous advantages, including low cost, small lead times, and the ability to produce complex shapes. However, there are also some disadvantages, including low dimensional accuracy and a limited understanding of the process mechanics.

Positive incremental sheet forming is a type of incremental sheet forming in which the sheet material is progressively deformed onto a protrusion. This type of incremental sheet forming has been a challenge to implement due to the difficulty in coordinating the vertical movement of the fixture with the forming tool. However, recent advancements in fixture design have made it possible to achieve accurate results with positive incremental sheet forming.

In this article, we present the development and testing of a positive incremental sheet forming fixture design that uses nylon sleeve bushes. The design provides a smooth and controlled descent of the fixture, ensuring accurate results in positive incremental sheet forming. The fixture was tested with both symmetric and asymmetric components, using modular wooden dies and a rotating tool with multiple diameters. The results of the testing showed improved dimensional accuracy and a deeper understanding of the process mechanics.

The use of nylon sleeve bushes in positive incremental sheet forming fixtures is a game-changer in the sheet metal forming industry. Not only does it provide improved accuracy, but it also allows for the production of complex shapes with greater ease. This new development is poised to revolutionize the industry and bring new opportunities for manufacturers and designers alike.

In conclusion, positive incremental sheet forming with nylon sleeve bushes is a promising development in the sheet metal forming industry. Its advantages and potential applications make it a valuable addition to any manufacturer’s toolkit. The results of this research provide valuable insights into the mechanics of the process and highlight the importance of continued innovation and development in the field.


[1] Siddiqi MU, Corney JR, Sivaswamy G, et al. Design and validation of a fixture for positive incremental sheet
forming. Proc IMechE, Part B: J Engineering Manufacture 2018; 232(4): 629–643.

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