Energy-saving peeling air knife based on wall attachment effect for planar-flow melt spinning

Abstract

The invention relates to an energy-saving peeling air knife based on a wall attachment effect for planar-flow melt spinning. The peeling air knife disclosed by the invention enables the consumption of compressed air to be low, the flow of peripheral air which is several times or several tens of times of the compressed air can be guided on an outer convex arc surface on the basis of the wall attachment effect, and an air pressure is lowered to be less than 0.2MPa from a compressed air pressure of 0.4MPa of a traditional air knife, an air curtain has a high impact force, and is thin and uniform, and a low divergence degree and a low noise are achieved; only a height of the peeling air knife needs to be accurately adjusted in an arc guide groove, and an angle has no need to be adjusted, thus an air blowing direction can be ensured to strictly follow the tangential direction of the excircle of a cooling roll; the peeling air knife can be precisely machined only through two-time wire cutting feeding in spite of a complex geometric structure, a lifting mechanism and a rotation mechanism can be omitted, a low cost is achieved, and maintenance is avoided; and a column of peeling points (lines) of a thin belt in a width direction is almost parallel to the generatrix of the roll surface of the cooling roll, a shear stress in the thin belt is minimized, a belt material is prevented from cracks and edge burrs, the soft magnetic properties of the thin belt cannot be deteriorated, and online winding is benefited.

Description

technical field [0001] The invention belongs to the technical field of planar flow casting strip stripping, and in particular relates to an energy-saving stripping air knife for planar flow casting based on the Coanda effect. Background technique [0002] Planar-flow melt spinning (PFMS) was first developed from chill blockmelt-spinning (CBMS), and the alloy liquid is pulled out from the molten pool along the roller surface through the high-speed rotation of a single chilled roller. A liquid film is formed on the surface of the roll, and solidified into a thin strip under the action of water cooling in the roll, which is peeled off and collected, and the rapid solidification technology of the strip with non-equilibrium solidification structure is obtained. This technical process can solve the casting of alloys that are prone to segregation, improve the mechanical properties and magnetic properties of materials, save a lot of energy and improve production efficiency. And bec...

AI Technical Summary

Problems solved by technology

The adjustment device announced by the invention cannot quickly adjust the stripping point and air stripping direction to the best position. This similar device must be repeatedly adjusted in an approximate manner in combination with the height and angle. In particular, the adjustment of the angle is only based on human intuition and experience. It can only inject gas roughly along the tangential direction, it cannot be quantified, and the randomness is large

If this problem cannot be completely solved, uncertain factors will be introduced into the process, which will artificially increase the difficulty of the process and seriously affect the production efficiency.

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