CN115488457A - High-finish discharging method and device - Google Patents

Abstract

The invention discloses a high-finish discharging method and a device thereof, which comprise a wire cut electric discharge machine, a control cabinet and a wire electrode, wherein the control cabinet comprises a control module, the wire cut electric discharge machine comprises a medium-wire cut electric discharge machine, one side of the control cabinet is provided with a pulse power supply, and the pulse power supply is connected with a pulse power supply and a backward diode in parallel. In the using process of the invention, the control module is improved in the pulse power supply, so that the discharge voltage is improved, and the establishment speed of a discharge channel is accelerated. The pulse power supply is connected with an inductor and a backward diode in parallel, the switch is used for controlling, the switch is closed during finish machining, and alternating current changing current is achieved, so that discharging is easy, slag is discharged completely, and the precision of the surface of a machined part is improved.

Description

High-finish discharging method and device

Technical Field

The invention relates to the technical field of wire cut electric discharge machines, in particular to a high-finish discharging method and a high-finish discharging device.

Background

The wire cut electric discharge machine generates pulse power source with one end connected to the workpiece to be machined and the other end connected to the molybdenum wire for cutting the workpiece, so that certain voltage difference is formed between the electrode wire and the workpiece to be machined to produce discharge, and the instantaneous high temperature is utilized to strip the local material of the workpiece to be machined from the matrix and gasify the local material.

If the corrosion removal product produced in the machining process is discharged and taken away by the flushing liquid in time, the corrosion removal product can be accumulated at an electric spark discharge position, the composition of an interelectrode medium is changed, the insulation strength is reduced, and a certain interval time is ensured after each spark discharge, so that the flushing liquid can flush the corrosion removal product, and a high-finish-degree discharge method and a device thereof are provided.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a high-finish discharge method and a high-finish discharge device.

In order to achieve the above object, one of the objects of the present invention is:

the high-finish discharging device comprises a wire cut electric discharge machine, a control cabinet and a wire electrode, wherein the control cabinet comprises a control module, the wire cut electric discharge machine comprises a medium-speed wire cut electric discharge machine, a pulse power supply is installed on one side of the control cabinet, and an inductor and a backward diode are connected in parallel on the pulse power supply.

Preferably, the positive pole of the pulse power supply is electrically connected with the processed workpiece, and the negative pole of the pulse power supply is electrically connected with the wire electrode.

Preferably, the wire electrode comprises a molybdenum wire.

The second purpose of the invention is: there is provided a high-finish discharge method including a high-finish discharge device as defined in any one of the preceding claims, comprising the method steps of:

(I) assembling:

s1, installing a wire electrode on a wire cut electric discharge machine, and then fixing a processed workpiece on a station table of the wire cut electric discharge machine;

(II) component connection stage:

s2, electrically connecting the positive pole of the pulse power supply with a processed workpiece, and electrically connecting the negative pole of the pulse power supply with the electrode wire;

(III) finishing: the method comprises the steps of establishing a discharge channel, charging an inductor and discharging the inductor;

s3, establishing a discharge channel, turning on a pulse power supply, turning off a switch, performing electric spark machining, simultaneously charging an inductor, and performing discharge machining when an electrode wire is close to a workpiece to be machined;

s4, when the pulse power supply is controlled to be cut off, the inductor performs follow current discharge to enable the molybdenum wire and the workpiece to generate alternating current;

(IV) high light cleaning stage:

and S5, generating alternating current changing current during inductive discharge, rapidly discharging, and flushing the electrode wire and the processed workpiece by the flushing liquid.

The invention provides a high-finish discharging method and a device thereof, which have the advantages that:

a control module is improved in the pulse power supply, transient rapid rising is carried out on the discharge voltage, and the speed of establishing a discharge channel is improved. The pulse power supply is connected with an inductor and a backward diode in parallel, the switch is controlled by the switch, the switch is closed during finish machining, alternating current changing current is achieved, discharging is easy, slag is discharged cleanly under the coordination of flushing liquid, and the effect of high surface finish degree is improved.

Drawings

FIG. 1 is a circuit diagram of a pulse power supply, a backward diode and an inductor of a high-finish discharging method and a device thereof according to the present invention;

FIG. 2 is a schematic structural diagram of a high-smoothness discharge device according to the present invention;

FIG. 3 is an enlarged schematic view of a high-smoothness discharge device of FIG. 2;

fig. 4 is a schematic diagram of a high-finish discharging method and its device, inductor, backward diode and circuit board mounting structure.

In the figure: 1. a wire electric discharge machine; 2. an electrode wire; 3. a control cabinet; 4. a pulse power supply; 5. A reverse diode; 6. an inductance.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-4, the present embodiment aims to provide a high-finish discharging device, which includes a wire-cut electric discharge machine 1, a control cabinet 3, and a wire electrode 2, wherein the control cabinet 3 includes a control module, the wire-cut electric discharge machine 1 includes a medium-wire cut electric discharge machine, a pulse power supply 4 is installed on one side of the control cabinet 3, the pulse power supply 4 is used for providing a voltage required for puncturing a machining medium in a discharge gap, and converting electric energy into heat energy after the gap is punctured, melting and removing a metal material, an inductor 6 and a backward diode 5 are connected in parallel to the pulse power supply 4, the inductor 6 and the backward diode 5 are connected in parallel to the pulse power supply 4, and the switch is controlled by a switch to close the switch during finish machining, so as to achieve alternating current, thereby discharging is easy and discharging is clean, and precision of machining part surfaces is improved.

The medium-speed wire cut electrical discharge machine integrates the cutting process of a slow-speed wire cut electrical discharge machine into a fast-speed wire cut electrical discharge machine so as to meet the requirements of multiple cutting and strip-free cutting, and a molybdenum wire is generally selected as a wire electrode 2. The medium-speed wire cutting machine has the advantages of both the slow-speed wire cutting machine and the fast-speed wire cutting machine in cutting workpieces, namely, in the process of multiple times of cutting, the high-speed wire cutting machine adopts the high-speed wire cutting machine to perform rough cutting for the first time, and the low-speed wire cutting machine adopts the slow-speed wire cutting machine to perform fine trimming and fine grinding for the second time and the later times.

The positive pole of the pulse power supply 4 is electrically connected with the processed workpiece, the negative pole of the pulse power supply 4 is electrically connected with the electrode wire 2, a certain voltage difference is formed between the electrode (negative pole) and the processed workpiece (positive pole), the electrode wire 2 comprises a molybdenum wire, and the molybdenum wire can carry out pulse spark discharge erosion removal and metal cutting forming on the workpiece.

The present embodiment is directed to a high-finish discharge method comprising any one of the above-described high-finish discharge devices, comprising the method steps of:

(I) assembling:

s1, installing a wire electrode 2 on a wire electric discharge machine 1, and then fixing a processed workpiece on a station table of the wire electric discharge machine 1;

(II) component connection stage:

s2, connecting the positive pole of a pulse power supply 4 with a processed workpiece electrically, and connecting the negative pole of the pulse power supply 4 with the electrode wire 2 electrically;

(III) finishing: the method comprises the steps of establishing a discharge channel, charging an inductor 6 and discharging the inductor 6;

s3, establishing a discharge channel, turning on a pulse power supply 4, turning off a switch, performing electric spark machining, simultaneously charging an inductor, and performing discharge machining when a wire electrode is close to a machined workpiece;

s4, when the pulse power supply is controlled to be cut off, the inductor performs follow current discharge to enable the molybdenum wire and the workpiece to generate alternating current;

(IV) high light cleaning stage:

and S5, generating alternating current changing current when the inductor 6 discharges, rapidly discharging, and flushing the electrode wire 2 and the machined workpiece by the flushing liquid.

The working principle and the advantages are as follows: the wire electrode 2 is arranged on the wire electric discharge machine 1, then a processed workpiece is fixed on a station table of the wire electric discharge machine 1, the positive pole of a pulse power supply 4 is electrically connected with the processed workpiece, the negative pole of the pulse power supply 4 is electrically connected with the wire electrode 2, the pulse power supply 4 is turned on, a switch is turned off, electric discharge processing is carried out, in the first stage, due to a backward diode 5 added in a control module in the pulse power supply 4, the positive pole of the backward diode 5 is connected with a low-potential end (a processed workpiece), the negative pole is connected with a high-potential end (the wire electrode 2), at the moment, the backward diode 5 is in a forward low-voltage action area, the tunnel current is very small, at the moment, the backward diode 5 is in a cut-off state, and the connection mode is called reverse bias. When the negative terminal is cut off, the follow current of the inductor 6 enables the backward diode 5 to be conducted in the forward direction, and the ionization effect of the machining liquid is removed along with the polarity change of the machining voltage, so that the speed of establishing a discharge channel is increased. The generation of reverse voltage makes the discharge easy and the slag is clean under the coordination of the flushing liquid, and the effect of high surface finish is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (4)

1. The utility model provides a high finish discharge device, includes spark-erosion wire cutting machine (1), switch board (3), wire electrode (2), switch board (3) include control module, its characterized in that, spark-erosion wire cutting machine (1) is including well wire cutting machine of walking, pulse power supply (4) are installed to one side of switch board (3), it has inductance (6) and backward diode (5) to connect in parallel on pulse power supply (4).

2. A high-fineness electric discharge apparatus according to claim 1, wherein the positive pole of the pulse power supply (4) is electrically connected with the workpiece to be processed, and the negative pole of the pulse power supply (4) is electrically connected with the electrode wire (2).

3. A high-finish discharge apparatus according to claim 1 wherein said electrode wire (2) comprises a molybdenum wire.

4. A method of high-finish discharge comprising a high-finish discharge device as claimed in any one of claims 1 to 3, comprising the method steps of:

(I) an assembly stage:

s1, installing a wire electrode (2) on a wire electric discharge machine (1), and then fixing a processed workpiece on a station table of the wire electric discharge machine (1);

(II) component connection stage:

s2, electrically connecting the positive pole of the pulse power supply (4) with a processed workpiece, and electrically connecting the negative pole of the pulse power supply (4) with the electrode wire (2);

(III) finishing: the method comprises the steps of establishing a discharge channel, charging an inductor (6) and discharging the inductor (6);

s3, establishing a discharge channel, turning on a pulse power supply (4), turning off a switch, performing electric spark machining, simultaneously charging an inductor (6), and performing discharge machining when the electrode wire (2) is close to a workpiece to be machined;

s4, when the pulse power supply is controlled to be cut off, the inductor (6) carries out follow current discharge to enable the molybdenum wire and the workpiece to generate alternating current changing current

(IV) high light cleaning stage:

s5, generating alternating current changing current when the inductor (6) discharges, rapidly discharging, and flushing the electrode wire (2) and the machined workpiece by flushing liquid.

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