Wire electric discharge machine and automatic programming device for wire electric discharge machine

• US 9,199,326 B2
• Filed: 07/09/2013
• Issued: 12/01/2015
• Est. Priority Date: 07/10/2012
• Status: Active Grant

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: Yamaoka, Masahide, Arakawa, Yasuo
• Primary Examiner(s): Evans, Geoffrey S
• Application Number:
  US13/937,980
• Publication Number:
  US 20140014625A1
• Time in Patent Office: 875 Days
• US Class Current: 1/1
• 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 configured to:

obtain a machining shape from the machining program;

calculate a position of a center of gravity of the machining shape and set an attachment/deposition region in which machining chips containing brass produced during machining are attached and deposited to the workpiece 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; and

attach and deposit machining chips containing brass produced during machining to the workpiece according to the set attachment/deposition region.

2. The wire electric discharge machine according to claim 1, wherein the wire electric discharge machine is configured to create a new machining program by adding the set attachment/deposition region to the machining program, or by substituting said set attachment/deposition region for a corresponding portion of the machining program.

3. 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 configured to:

obtain a machining shape from the machining program;

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 an attachment/deposition region in which machining chips containing brass produced during machining are attached and deposited to the workpiece 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 3, wherein the wire electric discharge machine is configured to create a new machining program by adding the set attachment/deposition region to the machining program, or by substituting said set attachment/deposition region for a corresponding portion of the machining program.

5. 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 configured to:

input a machining shape;

calculate a position of a center of gravity of the inputted machining shape and to set an attachment/deposition region in which machining chips containing brass produced during machining are attached and deposited to the workpiece 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; and

generate the machining program in which the set attachment/deposition region is taken into consideration.

6. 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 configured to:

input a machining shape;

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 an attachment/deposition region in which machining chips containing brass produced during machining are attached and deposited to the workpiece 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; and

generate the machining program in which the set attachment/deposition region is taken into consideration.

7. 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 configured to:

set 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; and

attach and deposit machining chips containing brass produced during machining to the workpiece according to the set attachment/deposition region,

wherein the wire electric discharge machine is configured to create a new machining program by adding the set attachment/deposition region to the machining program, or by substituting said set attachment/deposition region for a corresponding portion of the machining program.