JP2006035338A - Rotary wire brush device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary wire brush device capable of recovering the wear of bristle ends while rotating a wire brush by electrodepositing a composition member of a metal electrode of an electric discharge machining means to each bristle end of the rotary wire brush. <P>SOLUTION: The rotary wire brush device has the following characteristics. One metal electrode is arranged in the middle of a rotation track of the tip of the rotating rotary wire brush and the other electrode is also arranged on a place apart at an interval. The device is provided with the electric discharge machining means which recovers the wear of the bristle ends while rotating the rotary wire brush by electrodepositing the composition member of the metal electrode to each bristle end of the rotary wire brush. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotating wire brush, for example, a rotating wire brush for metal surface processing.

  Rotating wire brushes that process metal surfaces are designed by polishing the rotating brush tips against the metal surface that is the workpiece, so products and tips that are processed when the tips are not worn It is easy to cause a drop in the processing accuracy with the product processed at the time of wear, and it is difficult to provide a product with high processing accuracy and uniform accuracy.

Moreover, since the tip of the wire brush has been treated as a so-called disposable consumable that is replaced with a new wire brush each time it wears out of use, it is uneconomical.

In addition, in order to maintain high processing accuracy, it is necessary to perform early replacement while the wear of the hair ends does not progress. This increases the frequency of replacement and hinders improvement in productivity and is one of the causes of high cost. It was.

Even if continuous use is performed until the hair ends are worn out, the brush must be replaced every time the wear reaches the limit, and the check of the replacement time and the replacement work are complicated.

  The present invention aims to solve the above-mentioned problems, and provides a rotating wire brush device provided with an electric discharge machining means for recovering wear of a hair tip by electric discharge machining while rotating (operating) the wire brush. Objective.

  In the rotary wire brush device according to the first aspect of the present invention, one metal electrode is disposed in the middle of the rotation trajectory of the rotating rotary wire brush, and the other electrode is electrically connected to the rotary shaft side of the rotary wire brush. The electrical discharge machining means for recovering the wear of the hair tip by electrodepositing the metal electrode composition member on each hair tip of the rotary wire brush at the same time while rotating the rotary wire brush. It is characterized by having.

  According to a second aspect of the present invention, there is provided a rotating wire brush device, wherein one metal electrode is disposed in the middle of a rotating orbit at the tip of a rotating rotating wire brush, and the other electrode is disposed at an interval. While rotating the wire brush, there is provided an electric discharge machining means for simultaneously electrodepositing the metal electrode composition member on each hair tip of the rotary wire brush to recover the wear of the hair tip.

  According to a third aspect of the present invention, in the rotary wire brush device according to the first or second aspect, the one metal electrode and the other electrode are both or one is a rotor type electrode.

  According to a fourth aspect of the present invention, in the rotary wire brush device according to any of the first to third aspects, at least the electrode surface of the metal electrode is made of a hard material.

  According to a fifth aspect of the present invention, in the rotary wire brush device according to any one of the first to fourth aspects, discharge by the electric discharge machining means is performed at all times, periodically, or at any time during the rotation of the rotary wire brush. Discharge control means is provided.

A sixth aspect of the present invention is the rotary wire brush device according to any one of the first to fifth aspects, wherein the electric discharge machining means is connected in series between a DC power source and a positive terminal and a negative terminal of the DC power source. A capacitor charging circuit comprising a connected resistor, a capacitor and a diode, and a capacitor discharging circuit comprising a switching element, an electrode and a wire brush connected in series between both ends of the capacitor;
The diode is connected between a connection point of the capacitor and the wire brush and a connection point of the switching element and the electrode, and allows a capacitor charging current to flow, but does not allow a capacitor discharge current to flow. It is connected in the direction.

  According to the present invention, while rotating the wire brush, at the same time, the metal electrode composition member of the electric discharge machining means can be electrodeposited on each hair tip of the rotating wire brush to recover the hair tip wear. Therefore, a product with high processing accuracy and uniform accuracy can be provided.

In addition, since the wear of the wire brush tip can be regenerated, the wire brush can be used over a long period of time, the productivity can be improved by reducing the replacement frequency, and the inconvenience due to disposable can be eliminated. An inexpensive product can be provided.

  The present invention will be described with reference to FIGS. 1 to 6, taking a rotating wire brush device for metal surface processing as an example. 1 is a side view of a rotary wire brush, FIG. 2 is a plan view of the rotary wire brush, FIG. 3 is an enlarged view of a main part of a hair tip, FIG. 4 is a diagram corresponding to claims of an electric discharge machining means, and FIG. FIG. 6 is a schematic view of a rotor-type electrode, and FIG. 7 is a side view showing another example of the arrangement of two electrodes of the electric discharge machining means.

  This embodiment is a rotating wire brush device for polishing a metal surface provided with an electric discharge machining means for regenerating wear of a hair tip of the rotating wire brush, and the wire brush as a working member having conductivity is provided. In the middle of the rotation trajectory of the bristle tip as the action part, one metal electrode side of the electric discharge machining means described later is brought close to the hair tip side of the rotating wire brush, and the other electrode of the electric discharge machining means is rotated by the wire brush. It is the structure electrically connected to the shaft side.

1 and 2, the rotating wire brush device 201 for polishing a metal surface includes an electric discharge machining means 100 described later.
One electrode 6 of the electric discharge machining means 100 has a plurality of electrically conductive wires 202 raised radially around a rotating shaft 204 and has a hair tip 203 of a wire brush 201 formed into a substantially disk shape as a whole. In this example, the metal electrode 6 side is brought close to the hair tip side 203 of the wire brush 201, that is, the outer peripheral end face 206 (A) of the wire brush 201.

In addition, when the hair end side 203 is formed in an arc shape instead of parallel to the rotation axis,
It is preferable to arrange the wire brush 201 appropriately at positions corresponding to both ends of the arc as well as the outer peripheral end face 206 (A) side (not shown).

  The other metal electrode 61 of the electric discharge machining means 100 may be electrically connected to an appropriate position of the rotating wire brush 201 via, for example, a power supply brush or the like (not shown). The rotating shaft 204 of 202 is connected via the power supply brush 62.

In this way, after one metal electrode 6 of the electric discharge machining means 100 is placed on the rotating track side of the hair tip 203 of the wire brush 201 and the hair tip side 203 of the wire brush 201 acts on the workpiece W, A hard material having a hardness capable of polishing the workpiece W, for example, a cemented carbide alloy, is electrodeposited on the bristles side 203 moving along the rotation path.
Therefore, it is necessary that the metal electrode 6 is made of a material that can be electrodeposited, or at least the surface of the metal electrode 6 is made of a material that can be electrodeposited.

Further, for example, as shown in FIG. 3, the hair tip 203 of the wire brush 202 thus regenerated is formed by electrodepositing a hard material 65 on the tip end regions 206 (A) and 206 (B) of the hair tip 203. Resulting in uneven unevenness. 3 indicates a diffusion layer generated when the hard material 65 is electrodeposited on the wire brush 202. By forming such a diffusion layer, the boundary surface between the wire brush 202 and the hard material 65 is Fusing inseparable.
The electric discharge machining means 100 includes an electric discharge control means (not shown) for controlling electric discharge to be performed constantly, periodically, or at an arbitrary time while the rotary wire brush 201 is rotating.

According to the first embodiment, the composition of the metal electrode 6 on the hair tip side 203 is obtained by appropriately operating the electric discharge machining means 100 regularly or irregularly as necessary while rotating (operating) the wire brush 201. Since the member can be electrodeposited to regenerate the wear of the hair tips 203, a predetermined polishing ability can always be maintained.
Therefore, unlike the prior art, there is no difference in the polishing accuracy between the new stage and the worn stage, so that the processing accuracy at a desired height can always be maintained.
Further, unlike the prior art, it is not necessary to frequently replace the wire brush 201 due to wear, so it is not necessary to interrupt the polishing operation, and productivity can be improved.

Next, the electric discharge machining means 100 will be described with reference to FIGS.
FIG. 4 is a diagram corresponding to the claims of the electric discharge machining means, and FIG. 5 is a circuit diagram of the electric discharge machining means.
In FIG. 4, an electric discharge machining means 100 includes a DC power source 1 having a positive terminal + and a negative terminal −, for example, a power source that generates a DC voltage of several + to several hundreds V, and a positive terminal + and a negative terminal of the DC power source 1. -Capacitor charging circuit CCC composed of resistor 2, capacitor 3 and diode 4 connected in series between-and switching element 5 connected in series between both ends of capacitor 3, such as SCR, metal electrode 6 such as WC, TiC, etc. An electrode member 7 to which the electrode made of a hard material, or an electrode whose surface is covered with a hard material such as WC or TiC, and the other electrode 61 are electrically connected, for example, in the first embodiment And a capacitor discharge circuit CDC made of the conductive wire brush 202 described above.

The diode 4 has its anode connected to the connection point between the capacitor 3 and the electrodeposited member 7 and its cathode connected to the connection point between the switching element 5 and the electrode 6 to allow the capacitor charging current to flow. However, it is connected in a direction that does not allow the capacitor discharge current to flow.
The switching element 5 has an anode connected to a connection point between the resistor 2 and the capacitor 3, a cathode connected to the connection point between the negative terminal of the DC power source 1 and the electrode 6, and a gate that is ignited. It is connected to a circuit (not shown).

The electric discharge machining means 100 is configured as described above. When the power is turned on, the capacitor charging current flows from the positive terminal + of the DC power supply 1 to the negative terminal − of the DC power supply 1 through the capacitor charging circuit CCC. The positively charged terminal is charged toward the DC power supply voltage.
When the switching element 5 is turned on by applying an ignition pulse from an ignition circuit (not shown) after completion of charging, the capacitor 3 is charged to the minus of the capacitor 3 through the capacitor discharge circuit CDC from the positively charged terminal of the capacitor 3. A capacitor discharge current in a direction opposite to the capacitor charging current flows to the connected terminal, thereby generating an arc discharge between the electrode 6 and the electrodeposited member 7 (wire brush 202). The required hard material which is the composition of the metal electrode 6 is electrodeposited on the surface of the hair tip side 203 of the wire brush 202, and the worn hair tip side 203 is regenerated.

  5, the DC power source 1 used for the electric discharge machining means 100 includes an AC power source 11, a primary winding 121 connected between both ends of the AC power source 11, and a secondary winding 122. And a transformer 12 having an AC input terminal connected via a switch 13 between predetermined taps of the secondary winding 122 of the transformer 12 and a DC output terminal, and hence a positive terminal + and a negative terminal − of the DC power supply 1. And a full-wave rectifier 14.

  A capacitor charging circuit CCC comprising a resistor 2, a capacitor 3 and a diode 4 connected in series with each other is connected between the positive terminal + and the negative terminal − of the DC power supply 1, and between both ends of the capacitor 3 is connected in series. A capacitor discharge circuit CDC including the SCR as the switching element 5 connected to the metal electrode 6 and the electrode 61 electrically connected to the electrodeposited member 7 as the other electrode is connected.

  As shown in FIG. 5, the capacitor 3 includes a plurality of, for example, three fixed capacitors 31, 32, and 33 connected in parallel to each other, and one of these fixed capacitors is selected. A switch 34 connected to the anode may be used, or a single variable capacitor (not shown) may be used.

  The diode 4 has its anode connected to the connection point of the capacitor 3, here the switch 34 and the electrodeposited member 7, and its cathode connected to the connection point of the switching element 5 and the metal electrode 6 to charge the capacitor. The current is allowed to flow, but is connected in a direction that does not allow the capacitor discharge current to flow in the direction opposite to the capacitor charging current.

  The switching element 5 has an anode connected to the connection point between the resistor 2 and the capacitor 3, a cathode connected to the negative terminal of the DC power source 1 and the connection point between the metal electrodes 6, and a gate connected to the above-described gate. Connected to a starting circuit (not shown).

  Further, another capacitor discharge circuit is provided in parallel with the metal electrode 6 and the electrodeposited member 7 in the capacitor discharge circuit CDC described above, and the other capacitor discharge circuit is in parallel with the bleeder resistor BR and the bleeder resistor BR. The capacitor C is connected to turn off the SCR as the switching element 5.

In the example shown in FIG. 5, first, the switch 34 is operated (switched) to select one of the fixed capacitors 31, 32 and 33, and then the switch 13 is operated (switched). The required l taps of the secondary winding 122 of the transformer 12 are connected to one AC input terminal of the full-wave rectifier 14.
As a result, the AC voltage of the AC power supply 11 is converted into a DC voltage by the full-wave rectifier 14, and a capacitor charging current flows from the positive terminal + of the DC power supply 11 to the negative terminal-of the DC power supply 11 through the capacitor charging circuit CCC. 3 is charged at its positive terminal toward the DC power supply voltage.

When the switching element 5 is turned on by applying an ignition pulse from an ignition circuit (not shown) after completion of charging, the capacitor 3 is charged to the minus of the capacitor 3 through the capacitor discharge circuit CDC from the positively charged terminal of the capacitor 3. The capacitor discharge current in the direction opposite to the capacitor charging current flows to the connected terminal, and a discharge occurs between the metal electrode 6 and the electrodeposited member 7, and this discharge causes the composition of the metal electrode 6 on the surface of the electrodeposited member 7. Some are electrodeposited.
Further, since the capacitor discharge current flows also to other capacitor discharge circuits, the capacitor C connected in parallel with the bleeder resistor BR is gradually charged, and the switching element 5 is turned off after the discharge is completed.

As described above, the rotary wire brush device 201 of this embodiment has, as one electrode 6 and the other electrode 61, for example, a hair tip 203 of a wire brush 202 raised radially from the center of rotation (actually the tip of each wire). Are provided with an electric discharge machining means 100 for electrodepositing the composition member of the electrode 6 on the hair tip 203 by arc discharge (hereinafter also referred to as discharge) generated between the wire brush 202 and the rotating wire brush 202. In the middle of the rotation trajectory, one metal electrode 6 of the electric discharge machining means 100 is brought close to and away from the other, and the other electrode 61 is electrically connected to an appropriate place of the wire brush 202, for example, the rotating shaft 204 side. Then, while operating (rotating) the wire brush 202, the composition member of the metal electrode 6 is electrodeposited on each hair tip 203 of the wire brush 202 at the same time. Worn can be recovered.

An example in which the rotor type electrode 41 is used in place of the metal electrode 6 in the first embodiment will be described with reference to FIG.
The rotor-type electrode 41 is formed in a roller shape that can be rolled using an electrode material made of cemented carbide, and is rotatably supported by a holder portion 44 via a rotation shaft 43 of the electrode 41. ing.

By using such a rotor-type electrode 41, the outer peripheral surface side of the rotor (rotor-type electrode 41) is brought into contact with the outer peripheral end surface 206 (hair tip 203 side) of the rotary wire brush 201, or the contact is made. By appropriately disposing the wire brush 201, the rotor-type electrode 41 can follow the rotation of the wire brush 201 as needed, and the wear of the hair tip 203 of the wire brush 201 can be regenerated as described above. it can.

In the first embodiment, the other metal electrode 61 of the electric discharge machining means 100 is connected to the rotating shaft 204 of the rotating wire brush 202 via the power supply brush 62. It may be arranged in the same way as the one metal electrode 6 in the middle of the rotation trajectory of the hair tip 203 so as to come into contact with the hair tip 203 of the wire brush 202 (see FIG. 7).
Furthermore, in this case, if the rotor electrode 41 is used as the metal electrode 61, the electrical connection structure is simplified. Of course, in this case, a rotor-type electrode 41 may be used as one metal electrode 6 as shown in FIG.

  The rotating wire brush device of the present invention is not limited to metal, and can be widely used as a wire brush for a workpiece that is suitable for processing a rotating wire brush.

It is a side view of a rotation type wire brush. It is a top view of a rotation type wire brush. It is a principal part enlarged view of a hair end. It is a claim corresponding | compatible figure of an electrical discharge machining means. It is a circuit diagram of an electric discharge machining means. It is a schematic diagram of a rotor type electrode. It is a side view which shows the other example of two electrode arrangement | positioning of an electrical discharge machining means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 DC power supply + Positive terminal of DC power supply-Negative terminal of DC power supply 2 Resistance 3 Capacitor 4 Diode CCC Capacitor charging circuit 5 Switching element 6 Metal electrode (one electrode) 7 Electrode deposition member 41 Rotor type electrode 61 Electrode (the other) Electrode) CDC capacitor discharge circuit 100 Electric discharge machining means 201 Rotating wire brush device 202 Wire brush (working member)
203 Bristles side (action part)

Claims (6)

  The rotating wire brush is rotated by placing one metal electrode in the middle of the rotating track at the tip of the rotating rotating wire brush and electrically connecting the other electrode to the rotating shaft side of the rotating wire brush. At the same time, the rotating wire brush device is provided with electric discharge machining means for electrodepositing the metal electrode composition member on each hair tip of the rotating wire brush to recover the wear of the hair tip.   One metal electrode is disposed in the middle of the rotation trajectory at the tip of the rotating rotary wire brush, the other electrode is disposed at a distance, and the rotating wire brush is rotated simultaneously with the rotating wire brush. A rotating wire brush device comprising: an electric discharge machining means for electrodepositing the metal electrode composition member on each hair tip to recover the wear on the hair tip.   3. The rotating wire brush device according to claim 1, wherein one of the metal electrode and the other electrode is a rotor-type electrode.   4. The rotating wire brush device according to claim 1, wherein at least the electrode surface of the metal electrode is made of a hard material.   5. The rotary wire according to claim 1, further comprising a discharge control means for causing discharge by the electric discharge machining means to be performed constantly, periodically, or at any time during the rotation of the rotary wire brush. Brush device. The electric discharge machining means includes a DC power supply, a capacitor charging circuit including a resistor, a capacitor, and a diode connected in series between a positive terminal and a negative terminal of the DC power supply,
A switching element connected in series between both ends of the capacitor, a capacitor discharge circuit comprising an electrode and a wire brush;
The diode is connected between a connection point of the capacitor and the wire brush and a connection point of the switching element and the electrode, and allows a capacitor charging current to flow, but does not allow a capacitor discharge current to flow. The rotary wire brush device according to any one of claims 1 to 5, wherein the rotary wire brush device is connected in a direction.

Images