A Water-cooled Rolling Tool Head for Electrothermal Assisted Incremental Forming

Abstract

The invention relates to a water-cooling rolling tool head for electric-assisted incremental forming. The water-cooling rolling tool head comprises a cutter bar, a roller bracket, a roller assembly, a steel ring, a clamping ring and a bushing, wherein the roller assembly is connected to the roller bracket; the roller bracket is arranged at one end of the cutter bar; the steel ring, the clamping ring and the bushing are arranged at the other end of the cutter bar in sequence from inside to outside; the steel ring is provided with a water inlet for being connected with an external cooling water pipe and a power accessing screw hole for accessing the current; the cutter bar is provided with an annular water tank connected with the water inlet and the power accessing screw hole respectively; a through hole leading to the inner part of the cutter bar and performing water-cooling on the roller assembly is formed in the annular water tank. Compared with the prior art, the water-cooling rolling tool head can improve the conditions of local overheating and serious wear of a tool end in the electric-assisted incremental forming process, and can improve the formability of materials difficult to machine.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and in particular relates to a water-cooled rolling tool head for electrothermal assisted progressive forming. Background technique [0002] Heat-assisted incremental forming is a flexible processing method for processing difficult-to-deform metal sheets at room temperature, and can be used to form three-dimensional parts of magnesium alloys, titanium alloys and other materials. Gao Lin of Nanjing University of Aeronautics and Astronautics proposed in the invention patent "sheet metal electric heating numerical control progressive forming processing method and device" to pass current between the tool and the sheet material, so that the contact area between the sheet material and the tool can increase the forming temperature due to resistance heating, thereby increasing Progressive thermoforming methods for material formability. In practice, the tool head generally used in this method is mos...

AI Technical Summary

Problems solved by technology

During the forming process of this kind of tool head, the heat accumulates on the tool head, which is easy to cause the temperature of the tool head, especially the tool tip, to rise and oxidize

In addition, sliding friction occurs between the tool and the sheet, resulting in severe tool wear and poor surface quality of the sheet, which not only affects the formability and forming accuracy of the sheet, but also wears out the tool head quickly, resulting in higher costs

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