Wire electrode supplying device for use in a wire cut electric discharge machining apparatus
First Claim
1. A wire electrode supplying device for use in a wire cut electric discharge machining apparatus having a stationary portion provided with V-guides, comprising:
- a wire electrode feeding mechanism;
a pipe guide into which a wire electrode is inserted so as to be guided therealong toward a machining start hole formed in a workpiece to be machined;
a lifting mechanism for reciprocating said pipe guide up and down;
an electric feeder for supplying a machining electric current to said wire electrode; and
a winding mechanism for winding and removing said wire electrode supplied through said electric feeder, wherein said pipe guide is shaped to have a plurality of outside diameters increasing stepwise, wherein an outside diameter of one end portion of said pipe guide which is minimum in outside diameter is smaller than an outer diameter of said machining start hole so that said one end portion of said pipe guide is inserted into said machining start hole in said workpiece by said lifting mechanism before said wire electrode is fed to said winding mechanism, said pipe guide and said V-guides not interfering with each other.
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Accused Products
Abstract
A wire electrode supplying device in a wire cut electric discharge machining apparatus, which is capable of automatically supplying a wire electrode with accuracy during an automatic machining operation. In the wire electrode supplying device according to the present invention, an outside diameter of a pipe guide into which the wire electrode is inserted is changed stepwise, and its one end portion is made minimum in outside diameter so that the one end portion is allowed to be inserted into a machining start hole formed in a workpiece to be machined. Therefore, in machining a workpiece having a machining start hole small in diameter, the feeding of the wire electrode can be automatically, stably and accurately achieved.
23 Citations
3 Claims
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1. A wire electrode supplying device for use in a wire cut electric discharge machining apparatus having a stationary portion provided with V-guides, comprising:
- a wire electrode feeding mechanism;
a pipe guide into which a wire electrode is inserted so as to be guided therealong toward a machining start hole formed in a workpiece to be machined;
a lifting mechanism for reciprocating said pipe guide up and down;
an electric feeder for supplying a machining electric current to said wire electrode; and
a winding mechanism for winding and removing said wire electrode supplied through said electric feeder, wherein said pipe guide is shaped to have a plurality of outside diameters increasing stepwise, wherein an outside diameter of one end portion of said pipe guide which is minimum in outside diameter is smaller than an outer diameter of said machining start hole so that said one end portion of said pipe guide is inserted into said machining start hole in said workpiece by said lifting mechanism before said wire electrode is fed to said winding mechanism, said pipe guide and said V-guides not interfering with each other. - View Dependent Claims (2, 3)
- a wire electrode feeding mechanism;
Specification
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- Resources
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Current AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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Original AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsIwasaki, Takeshi, Yamamoto, Masahiro, Suzuki, Toshio, Magara, Takuji
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Primary Examiner(s)Evans, Geoffrey S.
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Application NumberUS07/353,421Time in Patent Office691 DaysField of Search219/69.12, 140/139, 140/140, 226/91, 226/196, 226/199US Class Current219/69.12CPC Class CodesB23H 7/102 Automatic wire threading
