Wire discharge machining apparatus with graphical wire length display

Patent metadata

Field	Value
Publication number	US-9446464-B2
Application number	US-201314357187-A
Country	US
Kind code	B2
Filing date	Jul 26, 2013
Priority date	Jul 26, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A wire discharge machining apparatus includes a numerical control unit carrying out numerical control of the wire discharge machining apparatus according to a machining program and a display unit displaying information concerning machining of the workpiece by the wire discharge machining apparatus. The numerical control unit includes a wire-remaining-length calculating unit calculating a length of the wire remaining in a wire bobbin attached to the wire discharge machining apparatus and a wire-consumed-length calculating unit calculating an estimated length of the wire used for machining of the workpiece. The display unit displays, as a graphic, information concerning a remaining length that is a calculation result in the wire-remaining-length calculating unit and information concerning an estimated consumed length that is a calculation result in the wire-consumed-length calculating unit, and adds information representing a progress of a machining stage to the information concerning the estimated consumed length.

First claim

The invention claimed is:

1. A wire discharge machining apparatus that causes an electric discharge between a wire and a workpiece and machines the workpiece, the apparatus comprising:
a numerical control unit that carries out numerical control of the wire discharge machining apparatus according to a machining program; and
a display unit that displays information concerning machining of the workpiece by the wire discharge machining apparatus, wherein
the numerical control unit includes
a wire-remaining-length calculating unit that calculates a length of the wire remaining in a wire bobbin attached to the wire discharge machining apparatus, and
a wire-consumed-length calculating unit that calculates an estimated length of the wire used for machining of the workpiece,

the display unit displays, as a graphic, information concerning a remaining length that is a calculation result in the wire-remaining-length calculating unit and information concerning an estimated consumed length that is a calculation result in the wire-consumed-length calculating unit, and adds information representing a progress of a machining stage to the information concerning the estimated consumed length, and
the wire-consumed-length calculating unit calculates the estimated consumed length based on a machining peripheral length, an estimated machining speed, and a wire feeding speed in each machining stage and uses, as the estimated machining speed used for calculation of the estimated consumed length, an average value of actual machining speeds acquired in machining in past.

2. A wire discharge machining apparatus that causes an electric discharge between a wire and a workpiece and machines the workpiece, the apparatus comprising:
a numerical control unit that carries out numerical control of the wire discharge machining apparatus according to a machining program; and
a display unit that displays information concerning machining of the workpiece by the wire discharge machining apparatus, wherein
the numerical control unit includes
a wire-remaining-length calculating unit that calculates a length of the wire remaining in a wire bobbin attached to the wire discharge machining apparatus, and
a wire-consumed-length calculating unit that calculates an estimated length of the wire used for machining of the workpiece,

the display unit displays, as a graphic, information concerning a remaining length that is a calculation result in the wire-remaining-length calculating unit and information concerning an estimated consumed length that is a calculation result in the wire-consumed-length calculating unit, and adds information representing a progress of a machining stage to the information concerning the estimated consumed length, and
the wire-consumed-length calculating unit calculates the estimated consumed length based on a machining peripheral length, an estimated machining speed, and a wire feeding speed in each machining stage and uses, for calculation of the estimated consumed length, the estimated machining speed corrected according to a ratio of an in-corner to the machining peripheral length.

3. A wire discharge machining apparatus that causes an electric discharge between a wire and a workpiece and machines the workpiece, the apparatus comprising:
a numerical control unit that carries out numerical control of the wire discharge machining apparatus according to a machining program;
a display unit that displays information concerning machining of the workpiece by the wire discharge machining apparatus; and
a conduction sensor that detects conduction caused by contact with the wire, wherein
the numerical control unit includes
a wire-remaining-length calculating unit that calculates a length of the wire remaining in a wire bobbin attached to the wire discharge machining apparatus, and
a wire-consumed-length calculating unit that calculates an estimated length of the wire used for machining of the workpiece,

the display unit displays, as a graphic, information concerning a remaining length that is a calculation result in the wire-remaining-length calculating unit and information concerning an estimated consumed length that is a calculation result in the wire-consumed-length calculating unit, and adds information representing a progress of a machining stage to the information concerning the estimated consumed length, and
the conduction sensor is attached at a position where the conduction sensor is capable of coming into contact with the wire wound around the wire bobbin attached to the wire discharge machining apparatus.

Assignees

• Mitsubishi Electric Corp

Inventors

• Hara Masayuki

Classifications

• B23H7/20

  for program control, e.g. adaptive · CPC title

• G05B19/182

  characterised by the machine tool function, e.g. thread cutting, cam making, tool direction control (G05B19/21 - G05B19/40 take precedence) · CPC title

• B23H11/00

  Auxiliary apparatus or details, not otherwise provided for · CPC title

• B23H7/02 Primary

  Wire-cutting · CPC title

• B23H1/02 Primary

  Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges · CPC title