Plate incremental forming device and method based on overlaid double-layer auxiliary materials

Abstract

The invention relates to a plate incremental forming device based on overlaid double-layer auxiliary materials. The plate incremental forming device comprises an upper auxiliary material, a lower auxiliary material and a tool head matched with the upper auxiliary material, and the upper auxiliary material and the lower auxiliary material are arranged on the two sides of a base material. Lubricating layers are arranged between the base material and the upper auxiliary material and between the base material and the lower auxiliary material. The tool head exerts pressure to the upper auxiliary material, so that the upper auxiliary material, the base material and the lower auxiliary material deform. A plate incremental forming method based on the device comprises the steps that 1) the lubricating layers are arranged on the upper surface and the lower surface of the base material and are attached to the upper auxiliary material and the lower auxiliary material, and a piled material is obtained; 2) the edge of the piled material is clamped and fixed, and processing is carried through the tool head; and 3) and the piled material is taken down, all the layers are separated, and the processed material is obtained. Compared with the prior art, it can be guaranteed that no residual height or processing mark exists on the surface of the base material, and high surface quality is achieved;and according to the plate incremental forming device based on the overlaid double-layer auxiliary materials and the plate incremental forming method, the stress state of base material forming can bechanged, friction force is reduced, and the forming limit of the base material is improved.

Description

technical field [0001] The invention belongs to the technical field of material processing, and relates to a sheet metal progressive forming device and method based on superimposed double-layer auxiliary materials. Background technique [0002] The surface quality and forming limit of sheet metal incremental forming parts are two important requirements. Amini et al. found in the literature "An investigation of conventional and ultrasonic-assisted incremental forming of announced AA1050 sheet" (International Journal of Advanced Manufacturing Technology, 2017, Volume 90, Issue 5-8, pp 1569-1578) that the effect on the tool head Ultrasonic vibration can increase the forming limit of the sheet. Lu et al. studied the double-point incremental forming method in the literature "Investigation of material deformation mechanism in double side incremental sheet forming" (International Journal of Machine Tools and Manufacture, Volume 93, June 2015, pp 37-48). Compared with the single-p...

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Problems solved by technology

This patent improves the formability of the target sheet by superimposing auxiliary materials, but this method cannot improve the surface quality of the target sheet, and there will still be obvious processing marks on the surface of the sheet

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