Wire-type electric discharge machining system capable magnetically of collecting material that has been removed from a workpiece and confirming the magnetic attraction
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakuji Magara, Masahiro Yamamoto
Life of this patent
Estimating the term…
Abstract
A wire-type electric discharge machining apparatus capable of attracting material from a workpiece to an integral electromagnet. An aperture is located proximate the electromagnet. When material is attracted by the electromagnet, the aperture will be obstructed. Attraction is confirmed by measuring the pressure in a chamber in communication with the aperture, such that a low pressure indicates obstruction, and thus attraction of the material to the electromagnet. If based on this measurement it appears that the material has not been attracted to the electromagnet, a further attempt is made at a different location of attraction.
Claims13
A wire-type electric discharge machining system comprising:
- an electromagnet operable to attract a material cut from a workpiece during a machining operation;
- an air hole movable in concert with said electromagnet relative to said workpiece, so that said air hole is obstructed when said material is attracted to said electromagnet;
- a vacuum device for providing a flow of air through said air hole;
- a pressure measuring device for measuring pressure in said vacuum device, said vacuum device tending to reduce pressure within itself;
- first pressure determining means for determining whether said material is attracted to said electromagnet based upon the result of measurement taken by said pressure measuring device;
- and
- first transfer control means for predeterminately moving said electromagnet relative to said workpiece based on the result of determination of said first pressure determining means.
A wire-type electric discharge machining system comprising:
- an electromagnet operable to attract a material cut from a workpiece during a machining operation;
- an air hole movable in concert with said electromagnet relative to said workpiece, so that discharge of air through said air hole is inhibited when said material is attracted to said electromagnet;
- a pressure generating device for discharging air from said air hole;
- a pressure gauge for measuring the pressure of air flowing through said air hole;
- pressure determining means for determining whether the material is attracted to said electromagnet based on the result of measurement taken by said pressure gauge;
- and
- transfer control means for moving said electromagnet relative to said workpiece based on the result of a determination by said pressure determining means.
Dependencies are inferred from the claim text.