Sharpness removing and blunting treatment method and device for disc roller scissor blades

Abstract

The invention provides a sharpness removing and blunting treatment method and device for disc roller scissor blades. Based on the magneto-rheological polishing treatment theory, the outer circumference of disc roller scissors is sleeved with an annular sleeve which is in clearance fit with the disc roller scissors and is of an inverted-N shaped groove body structure. Magnetic fields which are distributed in an inverted-N shaped mode are formed on the annular sleeve. The annular sleeve is filled with magneto-rheological working liquid. The disc roller scissors rotate relative to the annular sleeve. Soft polishing is generated on the blades on the two sides of the disc roller scissors and in the positions close to two internal angles of the inverted-N-shaped groove body structure through the magnetic field edge effect, a removal function is achieved, and sharpness removing and blunting treatment is conducted on the disc roller scissor blades. By the adoption of the sharpness removing and blunting treatment method and device, the microcosmic profile shape of the disc roller scissor blades can be improved, and the abrasion resistance and the splitting quality of metal plates are improved; the problems that in the prior art, sharpness removing and blunting treatment is conducted on disc roller scissors manually, so that secondary damage problems, for example, the blade blunt round radius is large, and the blades are inconsistent in shape are solved.

Description

technical field [0001] The invention belongs to the technical field of slitting processing of longitudinal shearing machines for metal plates, and in particular relates to a method and a device for desharpening and passivating the cutting edges of disc rolling scissors. Background technique [0002] With the rapid development of industries such as IT, electrical and telecommunications, power equipment, office machines, and hardware products, as well as the demand for high-speed blanking processing and energy-saving and material-saving of progressive dies, the dimensional accuracy, shape accuracy, and burrs of metal strips used as raw materials Indicators such as the quality of the cut section put forward higher requirements. Longitudinal shearing machine is a kind of cutting the cold-rolled wide-width metal sheet into strips of specific width for subsequent metal product forming processing. Its working principle is to use pairs of disc rolling scissors as tools for continuou...

AI Technical Summary

Problems solved by technology

However, during the grinding process of disc rolling scissors, due to the action of grinding force, there will be defects such as microscopic zigzag cutting edge formed by microscopic flashes and microscopic notches near the cutting edge, so that the actual cutting edge becomes an area composed of the above geometric elements. Powder metallurgy materials such as cemented carbide or powder metallurgy high-speed steel are the most serious. During use, the tool is often prone to local wear or even damage at the microscopic gap of the cutting edge, which seriously affects the service life and Shear sheet quality

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