JPH0641782Y2 - Manual wire electrode cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a manual wire electrode cutting device used for passing a wire electrode of a wire cut electric discharge machine through a die guide or the like.

(Prior Art) Conventionally, in a wire-cut electric discharge machine, a wire electrode is often broken, and a wire electrode may be cut to perform a preparation work for electric discharge machining.

In order to easily pass the wire electrode through the die guide,
The tip of the wire electrode must be cut into a shape that allows it to pass easily. As a cutting means for cutting the wire electrode, there is known one in which an operator manually cuts the wire electrode or performs it by an automatic wire connecting device.

(Problems to be solved by the invention) By the way, when the worker cuts the wire electrode by hand, the worker's hand may be damaged, the tip of the wire electrode may be bent, or the wire of the wire electrode may be broken. There is a problem that it is difficult to cut if the diameter is thick.

On the other hand, the automatic wire connection device is convenient but expensive,
It is necessary to input various settings to the NC device, which is a troublesome work.

An object of the present invention is to provide a manual wire electrode cutting device capable of easily and easily cutting the wire electrode manually so as to easily pass the wire electrode through the die guide in order to improve the above problems. It is in.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides two electric conductors for energizing wire electrodes on a base, which are separated from each other.
A manual wire electrode cutting device was constructed by providing a heat radiating plate for discharging Joule heat generated by energization of the wire electrode and a power supply device for energizing the current carrying body with the current carrying body.

(Operation) By adopting the manual wire electrode cutting device of the present invention, when the wire electrodes are pressed against the two electric conductors provided on the base and the power supply device is turned on to energize the two electric conductors, the electric current Flows into one of the electric conductors, the wire electrode, and the other electric conductor, and the wire electrode is cut by Joule heat. A radiating plate provided between the two electric conductors radiates Joule heat, for example, by pulling both ends of the wire electrode, the habit of the wire electrode is removed and the tip of the cut wire electrode is a die guide or the like. The shape makes it easy to pass through.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1 and FIG. 2, in a manual wire electrode cutter 1, a base 3 formed of an insulating plate such as Bakelite and extending in the left-right direction is provided with two electric conductors formed in a cylindrical shape and separated from each other. 5,7 are installed and fixed in parallel. The distance between the current-carrying body 5 and the current-carrying body 7 is set to, for example, the cutting length of the wire electrode W, and a heat radiating plate 9 having a thin plate shape is attached to the base 3 with screws or the like therebetween.

The heat dissipation plate 9 is, for example, a steel plate having a thickness of about 0.5 mm, and the distance between the heat dissipation plate 9 and the current-carrying bodies 5 and 7 is 1
The hole is opened at about 0 to 30 mm, and the conductor 7 on the opposite side is brought close to it. The heat dissipation plate 9 itself may be used as the electrode on one side.

As shown in FIGS. 1 and 2, the heat radiation plate 9 is attached to the base 3 by inclining upward to the right. A limit switch 11 as a detector is provided on the lower base 3 on the right side of the heat dissipation plate 9. A non-contact type detector other than the limit switch 11 may be used as the detector.

As shown in FIG. 2, a power supply device 13 such as a transformer is connected to the electric conductors 5 and 7 and the limit switch 11.
A voltage is adjusted by the wire diameter of the wire electrode W using a transformer for the power supply device 13.

With the above configuration, the wire electrode W can be carried by both hands of the operator.
When pressed against 5, 7, the heat dissipation plate 9 bends and the limit switch 11 provided at the lower part of the heat dissipation plate 9 operates to operate the power supply device 13.
Turns on. As a result, a current flows to the current carrying body 5, the wire electrode W and the current carrying body 7. Thus, the wire electrode W is easily and easily cut between the electric conductor 5 and the heat dissipation plate 9 by the Joule heat transmitted from the electric conductor 5 to the wire electrode W.

The heat radiating plate 9 is provided between the electric conductors 5 and 7 in the upper right direction, and the left end of the heat radiating plate 9 is set a few mm lower than the upper surface of the electric conductor 5 to set the tip of the cut wire electrode. Is not the pointed shape as shown in FIG.
As shown in (A) of the figure, it has a rounded shape and can be easily passed through a die guide or the like.

The current is prevented from flowing simply by short-circuiting the current-carrying bodies 5 and 7. In addition, from the electric conductor 5 to the wire electrode W
It goes without saying that the Joule heat transmitted to the part is partially radiated by the heat radiating plate 9.

If the heat sink 9 is not provided between the current conductors 5 and 7, the eccentricity of the wire electrode W or the thickness of the tip is cut at any place between the current conductors 5 and 7, but By providing the wire electrode W between the current-carrying bodies 5 and 7, it is possible to cut the wire electrode W uniformly between the current-carrying body 5 and the heat dissipation plate 9.

When the wire electrode W has a habit, the entire wire electrode W is stretched and the current carrying member 5 is slightly lowered from the position shown in FIGS. As a result, the whole of the wire electrode W is extended and the habit of the wire electrode W can be removed.

Instead of lowering the position of the current-carrying body 5 from the normal position, the same effect can be obtained by tapering the current-carrying body 5, forming a groove, or forming a step.

For example, (A) and (B) of FIG. 4 and (A) of FIG.
(B) is an example in which the current-carrying body 5 is a tapered cylindrical body. FIGS. 4 (A) and 4 (B) show a state in which the wire electrode W is pressed against the thick portion of the tapered tubular body which is the current-carrying body 5, and the same state as that shown in FIGS. 1 and 2. Produces the same effect.

5 (A) and 5 (B) show a state in which the wire electrode W is pressed against the thin portion of the tapered tubular body that is the current-carrying body 5, and the cylindrical shape shown in FIGS. 1 and 2 is shown. The same effect as cutting the current-carrying body 5 at a position slightly lower than usual is obtained.

6 (A) and 6 (B) and FIGS. 7 (A) and 7 (B) are examples in which the current-carrying body 5 is a stepped cylindrical body.
6A and 6B show a state in which the wire electrode W is pressed against the large-diameter portion of the stepped cylindrical body which is the current-carrying body 5, as shown in FIGS. 1 and 2. The same effect is obtained in the same state.

7 (A) and 7 (B) show a state in which the wire electrode W is pressed against the small-diameter portion of the stepped cylindrical body, which is the current-carrying body 5, as shown in FIGS. 1 and 2. Cylindrical current-carrying body 5
Has the same effect as cutting at a position slightly lower than usual.

(A) and (B) of FIG. 8 and (A) and (B) of FIG.
In the above, the current-carrying body 5 is an example of a grooved cylindrical body. In FIGS. 8A and 8B, the wire electrode W is connected to the electric conductor 5.
It shows a state in which it is pressed against the thick groove portion of the grooved cylindrical body, and the same effect can be obtained in the same state as shown in FIGS. 1 and 2.

9A and 9B show a state in which the wire electrode W is pressed against the thin groove portion of the grooved cylindrical body which is the current-carrying body 5, and is shown in FIGS. 1 and 2. The same effect as cutting the cylindrical current-carrying body 5 at a position slightly lower than usual is achieved.

In this way, by changing the heights of the wire electrode W in contact with the current-carrying body 5 and the left end of the heat dissipation plate 9, the wire electrode W
The area of the wire electrode W that hits the heat dissipation plate 9 can be changed depending on the wire diameter of. Thus, the state of the tip of the cut portion of the wire electrode W can be changed, and the habit of the wire electrode W can be removed.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, the wire electrodes are pressed against the two current-carrying members provided on the base, the power supply device is turned on, and the two power-supply devices are turned on. When a current is passed through the current-carrying body, a current flows through the one current-carrying body, the wire electrode, and the other current-carrying body, and the wire electrode can be easily and easily cut between the one current-carrying body and the heat sink by Joule heat. .

[Brief description of drawings]

FIG. 1 is a perspective view of a manual wire electrode cutting device according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIGS. 3 (A) and 3 (B) are manual wires of the present invention. It is the front view which showed the front-end | tip of the wire electrode cut | disconnected by the electrode cutting device. 4 to 9 show another embodiment of the present invention, FIG. 4 (A) is a plan view, FIG. 4 (B) is a front view of FIG. 4 (A), and FIG. (A) is a plan view and FIG. 5 (B) is a fifth view.
6A is a front view, FIG. 6A is a plan view, FIG. 6B is a front view of FIG. 6A, and FIG. 7A is a plan view. 7B is a front view of FIG. 7A, FIG. 8A is a plan view, FIG. 8B is a front view of FIG. 9 (A) is a plan view and FIG. 9 (B) is a front view of FIG. 9 (A). 1 ... Manual wire electrode cutter, 3 ... Base 5, 7 ... Conductor, 9 ... Radiator 11 ... Limit switch, 13 ... Power supply device

Claims (1)

[Scope of utility model registration request] 1. An electric conductor for energizing a wire electrode is provided on a base so as to be separated from each other, and a heat radiating plate for radiating Joule heat generated by energization of the wire electrode is provided between the electric conductor and the electric conductor. A manual wire electrode cutting device comprising a power supply device for energizing the body.