WIRE ELECTRIC DISCHARGE MACHINE AND AUTOMATIC PROGRAMMING DEVICE FOR WIRE ELECTRIC DISCHARGE MACHINE

• US 20140014625A1
• Filed: 07/09/2013
• Published: 01/16/2014
• Est. Priority Date: 07/10/2012
• Status: Active Grant

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: YAMAOKA, Masahide, ARAKAWA, Yasuo
• Granted Patent: US 9,199,326 B2
• Time in Patent Office: Days
• US Class Current: 219/69.12
• CPC Class Codes: B23H 1/04 Electrodes specially adapted therefor or their manufacture B23H9/00 takes precedence
• CPC Class Codes: B23H 11/00 Auxiliary apparatus or details, not otherwise provided for
• CPC Class Codes: B23H 7/065 Electric circuits specially adapted therefor
• CPC Class Codes: B23H 7/20 for programme-control, e.g. adaptive programme-control systems in general G05B19/00
• CPC Class Codes: G05B 19/40931 concerning programming of geometry
• CPC Class Codes: G05B 2219/45221 Edm, electrical discharge machining, electroerosion, ecm, chemical
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

In a wire electric discharge machine or an automatic programming device for a wire electric discharge machine, in which a core is held with a workpiece base material by attaching brass contained in a wire electrode to the machining groove during machining, an attachment/deposition region where machining chips containing brass produced during machining are attached and deposited to the workpiece is set based on a machining shape obtained from a machining program and the machining chips containing brass produced during machining are attached and deposited according to the set attachment/deposition region.

Claims

1. A wire electric discharge machine which relatively moves a wire electrode containing brass and a workpiece in accordance with a machining program to machine the workpiece by electric discharge produced between the wire electrode and the workpiece, the wire electric discharge machine comprising:

a machining shape calculation unit that obtains a machining shape from the machining program;

an attachment/deposition region setting unit that sets, from the obtained machining shape, an attachment/deposition region in which machining chips containing brass produced during machining are attached and deposited to the workpiece; and

an attachment/deposition unit that attaches and deposits machining chips containing brass produced during machining to the workpiece according to the attachment/deposition region set in the attachment/deposition region setting unit.

2. The wire electric discharge machine according to claim 1, wherein

the attachment/deposition region setting unit is configured to calculate a position of a center of gravity of the machining shape obtained from the machining shape calculation unit and to set the attachment/deposition region at intersections of two orthogonal straight lines, each passing through the position of the center of gravity of the machining shape, with the machining shape.

3. The wire electric discharge machine according to claim 1, wherein

the attachment/deposition region setting unit is configured to obtain an intersection of a straight line and a straight line, an intersection of a straight line and a curved line, or a point at which curvatures in front and behind thereof vary, from the machining program or the machining shape, and to set the attachment/deposition region at a position on a machining path at a predetermined distance away from at least any one of such an intersection or a point thus obtained.

4. The wire electric discharge machine according to claim 2, further comprising an attachment region reflection unit that makes the attachment/deposition region set by the attachment/deposition region setting unit reflect in the machining program.

5. A wire electric discharge machine which relatively moves a wire electrode containing brass and a workpiece in accordance with a machining program to machine the workpiece by electric discharge produced between the wire electrode and the workpiece, the wire electric discharge machine comprising:

an attachment/deposition region setting unit that sets an attachment/deposition region in which machining chips containing brass produced during machining are attached and deposited to the workpiece, for each predetermined distance from an approach block finishing position of the machining program;

an attachment/deposition unit that attaches and deposits machining chips containing brass produced during machining to the workpiece according to the attachment/deposition region set in the attachment/deposition region setting unit.

6. The wire electric discharge machine according to claim 5, further comprising an attachment region reflection unit that makes the attachment/deposition region set by the attachment/deposition region setting unit reflect in the machining program.

7. An automatic programming device which creates a machining program used in a wire electric discharge machine that relatively moves a wire electrode containing brass and a workpiece to machine the workpiece by electric discharge produced between the wire electrode and the workpiece, the automatic programming device comprising:

a machining shape input unit that inputs a machining shape;

an attachment/deposition region setting unit that sets an attachment/deposition region from the machining shape inputted in the machining shape input unit; and

a machining program generation unit that generates the machining program in which the attachment/deposition region set in the attachment/deposition region setting unit is taken into consideration.

8. The automatic programming device according to claim 7, wherein

the attachment/deposition region setting unit is configured to calculate a position of a center of gravity of the inputted machining shape and to set the attachment/deposition region at intersections of two orthogonal straight lines, each passing through the position of the center of gravity of the machining shape, with the machining shape.

9. The automatic programming device according to claim 7, wherein

the attachment/deposition region setting unit is configured to obtain an intersection of a straight line and a straight line, an intersection of a straight line and a curved line, or a point at which curvatures in front and behind thereof vary, from the input machining shape, and to set the attachment/deposition region at a position on a machining path at a predetermined distance away from at least any one of such an intersection or a point thus obtained.

10. The automatic programming device according to claim 7, wherein

the attachment/deposition region setting unit is configured to set the attachment/deposition region for each predetermined distance from an approach block finishing position of the machining shape.