Method and apparatus for removing burrs from products fabricated from metal stock
AssigneeNational Research Institute for Metals
InventorsIsao Okane, Sadao Fukushima, Kinji Tanuma
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Abstract
A method and an apparatus for clearing burrs from products fabricated from metal stock. The burr of a product is used as one electrode, and another electrode is formed by extending an electrode material along, and apart from, the burr. A voltage is applied across the electrode to generate an arc between them. In the meanwhile, a magnetic field having a magnetic flux flow crossing the arc is formed to drive the arc along the burr by an electromagnetic force whereby the burr is melted and removed from the product.
Claims17
A method for melting and removing a burr which is a thin ridge or area of roughness formed on a product fabricated from metal stock without substantially damaging the product, which comprises generating an arc with enough intensity to melt said burr between the burr as one electrode and another electrode composed of an electrode material extending along, and spaced from, the burr;
- forming a magnetic field having a magnetic flux flow crossing the arc, thereby to drive the arc along the burr by an electro-magnetic force and directing a stream of gas in the space between the burr and the opposing electrode so that the gas stream impinges against the burr with sufficient velocity to blow off the molten burr.
An apparatus for melting and removing a burr which is a thin ridge or area of roughness formed on a product fabricated from metal stock without substantially damaging the product, comprising an electrode material extending along, and spaced from, the burr;
- a power source for applying a voltage across the burr and the electrode material to generate an arc with enough intensity to melt said burr between them;
- means for forming a magnetic field having a magnetic flux flow crossing the arc, thereby to drive the arc along the burr by an electromagnetic force and means for directing a stream of gas in the space between the burr and the opposing electrode so that the gas stream impinges against the burr with sufficient velocity to blow off the molten burr.
Dependencies are inferred from the claim text.