JPH02131816A - Core handling device for wire electric discharge machine - Google Patents

Abstract

PURPOSE:To make it possible to remove a core from a machined portion of a work with magnetic attraction by exerting a magnetic force of an electromagnet disposed on a holder of a core handling device through freely deformable iron powder contained in a lapping film. CONSTITUTION:A core 2 is cut with a wire electrode off a work 1. An upper nozzle 4 is moved upward to avoid interference with an electromagnet 11. A holder 12 driven with a drive device moves above the core 2 and moves downward. When the core 2 drops from the cutoff position, a lapping film 13 containing iron powder 14 comes in contact with the work 1 and maintains a sufficient area of contact with the core 2. When the iron powder is magnetized by magnetizing the electromagnet 11, the work 1 and the core 2 are also magnetized. When the holder 12 moves upward, the core 2 moves upward while being attracted to and together with the electromagnet 11 and is removed from a machined portion of the work 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a core processing device for a wire electrical discharge machining device.

[Conventional technology]

FIG. 7 is a cross-sectional view showing the machining of a workpiece. In the figure, (1) is a workpiece attached to the machining table of the main body of a wire-cut electric discharge machine using a kuhunpu, etc., and (2)
is the core to be cut out from the workpiece by machining, (3
) is a wire electrode, and (4) is provided at the tip of the upper arm that extends from the column of the main body of the wire-cut electric discharge machine (not shown in the figure) onto the processing tape μ, and the inside thereof is connected to the wire furnace FM.
(3) is an upper nozzle for passing through and spouting machining fluid toward the machining position; (5) is an upper nozzle/
A nine-electrode guide die is provided in L/(4), and (6) is a lower arm extending downward from the workpiece (1) that can be raised and lowered from the cuff of the main body of the wire-cut electrical discharge machine, or holds the above-mentioned processing table. A lower arm (7) is attached to the tip of the lower arm (6), and a wire Km (3) is passed through the lower arm (7), which is movable up and down on the bed. A lower nozzle device for spouting machining fluid toward the machining position, (7a) is its holder, (7b) is a float type nozzle, (8) is a t-pole provided in the lower nozzle device (7) Guide dice, (9)
is the ninth current-carrying pin that passes the voltage pulse for electrical discharge machining to the wire t-pole (3), and QO is the wire electrode take-off loaf.

FIGS. 8 and 9 are partial cross-sectional views showing how the core is attracted by magnets in the prior art. ) S (b) is a shaft magnet, (auto) is a holder that holds the shaft magnet Qlt, and is moved above the lower nozzle device (7) by a drive device (not shown).

Next, the operation will be explained.

The lower arm (6) is configured to be able to be controlled to move vertically during cutting by a drive mechanism (not shown), and can approach or separate from the workpiece (1) as necessary. .

During the machining period, the wire electrode (3) is continuously transported from the wire electrode supply drum (not shown in the figure) to the machining area where the workpiece (1) is attached, via several guide rollers, brake means, etc. In the processing section, a constant tension is maintained between the upper and lower electrocutting guide dies (5) and (8). At the same time, a voltage pulse is applied between the wire electrode (3) and the workpiece (1), and the workpiece (1) is machined by the discharge erosion caused by this. For the upper nozzle lv (3
), and the machining fluid is ejected and supplied from the lower nozzle device <<7>>. The lower nozzle device (7) is, for example, disclosed in Japanese Patent Application No. 1983-
068216, and if the machining fluid is introduced through the machining fluid supply path (7C) during normal machining, the float The formula noz/L/(7b) is the holder (
7a), and when the tip of the wire electrode (3) is automatically inserted into the machining hole of the workpiece (1), the machining fluid is supplied through the machining fluid supply (7d). By introducing the pipe, float type nozzle IV
(Wb) is pushed downward. Case 9, machining fluid supply path (7d) Even if machining fluid is not introduced through the t-, for example, when the tip of the float nozzle (7b) is very close to the surface of the workpiece (1) teeth,
The nozzle lv is increased by the reaction pressure of the machining fluid ejected from the tip of the nozzle μ.
(7b) is pushed down somewhat.

The machining feed between the workpiece (1) and the wire electrode (3) is controlled by a numerical control device, etc., relative to the workpiece (1) and the wire electrode (3) along the desired machining contour. This is done by moving.

Therefore, when cutting the workpiece (1) as described above, when the W machining progresses and the machining position reaches the W machining end point, the core (2) is cut off. The cut core (2) remains in the cut position due to friction on the contact surface with the workpiece (1).When the core (2) is cut off, the upper nozzle (4) ) rises to the upper limit of the travel stroke, then the omitted drive device moves the holder (b) onto the lower nozzle device (7).Furthermore, the holder (self) moves between the electromagnet east and the workpiece. A primary electromagnet (
(b) is excited and attracts the core (2), and the holder (6) rises to remove the core (2) from the processing portion of the workpiece (1).

[Problem to be solved by the invention]

The core processing device of the conventional wire electrical discharge machining device is configured as described above, so that the core (2) is connected to the lower nozzle μ device (7).
》If there is a height difference with the workpiece (1) due to falling onto the workpiece, or if there are irregularities in its posture or shape, the magnetic force of the electromagnet α℃ will be sufficiently transmitted to the core (2》). There are nine issues that need to be resolved, such as the inability to perform suction operation.

This invention was made to solve the above-mentioned problems, and it is possible to adsorb the core regardless of the height difference between the workpiece and the core, or the shape or orientation of the core. It is an object of the present invention to obtain a core processing device for a wire electrical discharge machining apparatus that can remove a core from a machined part of a workpiece.

[Means for Solving the Problems] A core processing device for a wire electrical discharge machining device according to the present invention includes:
The device is equipped with an adsorption means that uses magnetic force to adsorb a core that has been cut off from a workpiece, and a removal means that removes the core that has been adsorbed by the adsorption means out of the machining area, wherein the adsorption means applies magnetic force. a magnetic force generating means that generates magnetic force, and a magnetic force transmitting means that is deformable and forms a magnetic path for transmitting the magnetic force of the magnetic force generating means and is provided at a portion of the magnetic force generating means that faces the core. be.

[For production]

In this invention, the magnetic force transmitting means is freely deformed and brought into close contact with the core according to the height difference between the workpiece and the core, or the shape or posture of the core, and the magnetic force of the magnetic force generating means is transferred to the core. to communicate.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to the drawings. 'l
In g11k, Oυ is an electromagnet corresponding to a magnetic force generating means for adsorbing the core, and (O) is a hoist corresponding to a removing means that holds an electromagnet αυ and moves in the plane direction and vertical direction by an omitted drive device. p dar (to) is a thin film (here, a wrap film is used), α◆ is a wrap film (
The iron powder contained in the iron powder corresponds to a means of transmitting magnetic force. In Fig. 2, (a) is a hose band for layering the wrap film 03 tube electromagnet αυ, at! J
is a bolt, aη is a nut, and bolt 01 nut αη
Tighten the hose spand Qω to the electromagnet α. FIG. 8 is a partial sectional view showing a place where the core (2) has fallen by a distance ΔH from the workpiece (1) after being cut off.

Next, the operation will be explained. The core (2) is a wire electrode (
3), it is cut off from the workpiece (1). Core (2)
Due to the timing when the core (2) is cut off and the weight of the core (2), the core (2) falls from the cut off position and the lower nozzle /I/
(7) It may get on top. Next, move the upper nozzle A/(4) upward to avoid interference with the electromagnet (b).

Next, the holder (6) which is omitted and driven by the nine drive device (6)
moves above the core <<2>> and further descends.

Here, if the core (2) falls from the cutoff position as shown in the above, the state of the electromagnet (b) on the side facing the core (2)! ! As shown in diagram itifIg1, iron powder α◆
Once the wrap film containing (1) comes into contact with the workpiece (1) and has a sufficient contact surface with the core (2), the electromagnet (2) is excited by the omitted power source. The iron powder Q4 in the wrap film (to) is magnetized, and at the same time, the J workpiece (1) and the core (2) are magnetized. next,
As the holder (6) rises, the core (2) rises together with the electromagnet Ql) while being absorbed, and the workpiece (1)
) is removed from the processed part.

Next, the electromagnet Q1) moves onto the core corpse field provided in the omitted machining t11{l1 section, is demagnetized, and the core (2) falls.

In addition, in the above-mentioned dormitory example, iron powder α→ is inserted between the electromagnet αη and the tudefim (to). It is also possible to include it.

Also, a permanent magnet may be used instead of the electromagnet (b),
In this case, the core (2) can be removed by pressing it against the core drop plate (7) as shown in FIG.

Magnetic powder may be used instead of iron powder α◆. Furthermore, although the wrap film Q3 is used as the thin film here, vinyl μ, rubber, etc. may also be used.

〔Effect of the invention〕

As described above, according to the present invention, since the magnetic force of the magnetic force generating means is configured to be transmitted to the core via the deformable magnetic force transmitting means, a height difference occurs between the workpiece and the core. Or, even if there are irregularities in the posture or shape of the core, the suction
The effect is that a device capable of performing t-operations can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a core processing device for a wire electrical discharge machining machine according to an embodiment of the present invention, and FIG. 2 is an external view showing a core processing device for a wire electrical discharge machining machine according to an embodiment of the present invention. , WIs to WIj5 are diagrams for explaining the operation process of the core processing device of a wire electrical discharge machining device according to an embodiment of the present invention, and FIG. 6 shows another embodiment of the present invention. li! FIGS. 7 to 9 are diagrams for explaining the operation process of the core processing apparatus of the conventional wire cutting machine. In the figure, (l) is the historical artifact, (2) is the core, 03)
is an electromagnet, (b) is a holder, Q3Fi foot film, and C141 is an iron powder. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] A core processing device for a wire electrical discharge machining machine, comprising an adsorption device that magnetically adsorbs a core to be cut off from a workpiece, and a removal device that removes the core adsorbed by the adsorption device out of the machining area. In the above, the adsorption means is deformable and forms a magnetic path for transmitting the magnetic force of the magnetic force generating means, and is provided at a portion of the magnetic force generating means facing the core. A core processing device for a wire electrical discharge machining device, comprising a magnetic force transmitting means.