KR102035064B1 - Cleaning apparatus for wire electric discharge machin - Google Patents

Abstract

According to the present invention, an ultrasonic wave generating element is mounted in a processing liquid tank, and only when a wire is not electric dischraged, an ultrasonic wave is generated to remove a foreign substance without a stop of operation of a wire electric discharge machine. Therefore, a foreign substance attached to the processing liquid tank or the processing liquid tank can be easily and quickly removed. Moreover, according to the present inention, when a wire is not electric dischraged, an ultrasonic wave is generated to remove a foreign substance that is stuck to improve quality by increasing cleaning and foreign substance removing effects with respect to an object to be discharged during a process using the ultrasonic wave. According to the present invention, at least one ultrasonic wave generating element is arranged to transmit an ultrasonic wave to the whole inside of the processing liquid tank, the whole the processing liquid tank can be cleaned without interference on an object to be discharged.

Description

Cleaner for wire electric discharge machine {CLEANING APPARATUS FOR WIRE ELECTRIC DISCHARGE MACHIN}

The present invention relates to a washing apparatus for a wire electric discharge machine, and more particularly, when the wire electric discharge machine does not perform electric discharge machining, it is possible to wash the processing liquid tank or the inside of the processing liquid tank to every corner by using ultrasonic vibration. It is possible to continue the wire discharge machining without stopping the wire discharge machining for removing or cleaning foreign substances while removing foreign substances stuck to the processing liquid tank or the process liquid tank or the discharge workpiece without stopping the wire discharge machine. Productivity could be increased.

EDM can be divided into super drill electric discharge machine, wire electric discharge machine, and tap electric discharge machine. Here, the super drill electric discharge machine is used to form grooves or holes in the discharge workpiece, the wire electric discharge machine is processed by discharging a complex shape, etc. while winding the wire, and the tap machining electric discharge machine is a groove formed in the electric discharge workpiece Refers to a device that inserts a tap tool into a hole to form a tab through electric discharge machining.

Among such electric discharge machines, a wire electric discharge machine is usually manufactured by discharging the processing liquid at a point where the electric discharge workpiece is deposited in the processing liquid or by discharging the processing liquid to the discharge processing. In the following (Patent Documents 1) to (Patent Document 3), a technique relating to such a wire electric discharge machine is disclosed.

(Patent Document 1) Korean Patent Publication No. 10-2016-0132705

The present invention relates to an external wire bobbin control device for a wire electric discharge machine, which uses a damper bar and a displacement sensor to maintain a constant wire supply and to minimize fluctuations in wire tension, thereby preventing disconnection and wire breakdown, and finally, the quality of the finished product. Provides an external wire bobbin control device for a wire discharge machining machine that can improve the.

(Patent Document 2) Korean Patent Publication No. 10-2017-0074803

The core image acquisition means is mounted at a position overlooking the workpiece on the table, such as the upper portion of the wire discharge machine, and the core is processed while the core is fixed by using the core lock function, and the end is processed to the end of the machining path to cut the core. In this finished step, the core and the workpiece are imaged by the core image acquisition means, and whether the processed groove is a constant width in the captured image, whether the processed groove has adhered and deposited matter of the debris, and the surface light of the core and the workpiece. By the difference, it is determined whether the middle core is fixed, and when the middle core is not fixed, the machining is stopped, and the machining proceeds by confirming the fixing of the middle core so that the continuous processing can be safely performed. In addition, when the core is dropped without being fixed, processing is stopped, so that damage to the nozzle, the wire guide portion, or the like can be prevented.

(Patent Document 3) Korean Patent Publication No. 10-2018-0048392

Even if the installation environment changes, a wire electric discharge machine capable of appropriately performing thermal displacement correction of the upper and lower guides is provided. A storage unit for storing the temperature of the mechanical element as temperature data and a representation unit for numerically expressing the installation environment as environmental data are provided. Moreover, the position command part which instructs the relative position of an up-and-down guide, and the relational expression calculation part which calculates a relational expression by machine learning are made into input data as temperature data and environmental data as input data, and a relative position is teacher data. . In addition, a correction amount is calculated by substituting the temperature of the mechanical element into this relation formula, and when the error between the relative position of the up-down guide based on this correction amount and the relative position commanded by the position command unit is small, this relation formula is formulated. And a correction formular for determining the relative position of the upper and lower guides using the relation formula.

On the other hand, such a wire electric discharge machine, the following problems occur as the discharge processing is settled in the processing liquid tank or the processing liquid is ejected for the discharge processing.

(1) Foreign matters generated by electric discharge machining are settled in the processing liquid tank or the processing liquid tank, and after a long time, these foreign matters adhere to the bottom and the edge of the processing liquid tank or the processing liquid tank.

(2) The foreign matter thus stuck is periodically removed. In this case, since the wire discharge processing machine must be completely stopped, the operation rate of the wire discharge processing machine decreases.

(3) In addition, since the stuck foreign matter has to be removed by the operator himself, it takes a long time to remove the foreign matter and the wire electric discharge machine cannot be used during the removal of the foreign matter, resulting in low productivity.

(4) In particular, it is difficult for a long time to remove the foreign matters stuck to the place where it is difficult to remove the foreign matters, such as the processing liquid tank, the edge of the processing liquid tank, the connection part, and the part using the packing. This takes

(5) Increase in labor cost for removing stuck foreign matter and productivity decrease due to inability to operate wire electric discharge machine.

(6) In addition, depending on the degree of fixation of foreign matter, the removal cycle of the foreign matter may be shortened, such that labor costs and productivity decrease may occur more frequently.

(7) The foreign matter which is not firmly fixed may adhere to the discharge workpiece or the like when the discharge machining is performed, thereby degrading the quality of the discharge workpiece.

Korean Patent Publication No. 10-2016-0132705 (Published: 2016.11.21) Korean Patent Publication No. 10-2017-0074803 (Published: 2017.06.30) Korean Patent Publication No. 10-2018-0048392 (Published: 2018.05.10)

In view of the above, the present invention is equipped with an ultrasonic wave generating element in the processing liquid tank or the processing liquid tank, and configured to generate ultrasonic waves only when the wire electric discharge machine does not perform the electric discharge machining. It is an object of the present invention to provide a cleaning apparatus for a wire electric discharge machine that enables to easily and quickly remove foreign matters stuck to a process liquid tank or a process liquid tank without stopping the operation of the electric discharge machine.

In addition, the present invention is to remove the foreign matter stuck by generating ultrasonic waves when the wire discharge processing is not made as described above, the wire to improve the quality by increasing the effect of cleaning and removing foreign matter on the discharge workpiece being processed using ultrasonic waves Another object is to provide a washing apparatus for an electric discharge machine.

In addition, the present invention arranges at least one ultrasonic wave generating element to transmit ultrasonic waves to the entire processing liquid tank or the whole processing tank, so that the washing action is performed on the entire processing liquid tank or the processing liquid tank without being interfered with the discharge workpiece. It is yet another object to provide a cleaning device for a wire discharge machine that makes it possible.

In order to achieve the above object, the cleaning apparatus for a wire discharge machine according to [Example 1] of the present invention is a wire discharge to control the discharge machining head (H) by depositing the discharge workpiece in the processing liquid tank (10). In the processing machine, it comprises at least one ultrasonic wave generating element (21) mounted to the processing liquid tank 10 to operate under the control of the controller 20, the controller 20 is discharged to the processing head (H) The ultrasonic wave generating element 21 is operated only when no wire cutting is performed to wash the processing liquid tank 10; and the ultrasonic generating element 21 is installed at each inner corner of the processing liquid tank 10. However, the ultrasonic wave generated by the ultrasonic wave generating element 21 is installed to be irradiated toward the inner center of the processing liquid tank (10); Inside each of the corners of the processing liquid tank 10 is formed in a rectangular shape, the two ultrasonic generators 21 to face each other to generate ultrasonic waves, the other two ultrasonic generators 21 are ultrasonic It is characterized in that it is installed to irradiate toward the inner center of the processing liquid tank (10).

The cleaning apparatus for a wire electric discharge machine according to [Example 2] of the present invention includes a processing liquid tank for filtering and circulating the processing liquid so as to spray the processing liquid on the discharge workpiece placed on the table, and the discharge machining head. In the wire electric discharge machine for controlling the wire cutting, comprising: at least one ultrasonic wave generating element mounted on the processing liquid tank to operate under the control of the controller; the controller is ultrasonic only when not cutting the wire with the discharge machining head; Operating the generating element 21 to clean the inside of the processing liquid tank; wherein the ultrasonic generating element 21 is installed at each corner of the inside of the processing liquid tank, and the ultrasonic wave generated by the ultrasonic generating element 21 To irradiate toward the inner center of the processing liquid tank; Inside each of the corners of the processing liquid tank having a rectangular shape, two ultrasonic generating elements 21 to face each other to generate ultrasonic waves, the other two ultrasonic generating elements 21 is ultrasonic processing liquid It is characterized in that it is installed to irradiate toward the center inside the tank.

delete

Finally, the controller 20 is characterized in that the controller for controlling the entire wire discharge machining machine for controlling the discharge machining head (H).

The washing apparatus for a wire electric discharge machine according to the present invention has the following effects.

(1) Since the foreign matter adhered to the processing liquid tank or the processing liquid tank is removed using the ultrasonic wave generating element, the effect of removing the foreign matter can be enhanced.

(2) Particularly, when the wire electric discharge machine does not perform electric discharge machining, ultrasonic waves are generated to remove foreign substances and the like, so that the wire electric discharge machine can be cleaned without stopping for the purpose of cleaning the processing liquid tank or the processing liquid tank.

(3) Therefore, there is no need for manpower to clean the processing liquid tank or the processing liquid tank, and the foreign material removal effect can be obtained without stopping the wire discharge processing machine, thereby improving productivity.

(4) Since the ultrasonic wave is generated even during the wire discharge machining, foreign matters stuck to the discharge workpiece during the discharge machining by the ultrasonic wave generated at this time can also be removed, thereby improving the quality of the discharge workpiece.

(5) As the controller to control the ultrasonic wave generating element, the controller that controls the whole wire discharge processing machine is used as it is, so it can be applied by changing a simple program part, so that the cleaning effect and the foreign matter removal effect can be simultaneously obtained while minimizing the additional configuration. .

(6) There is no need to remove or wash the foreign matter stuck separately, which can reduce the washing time and increase productivity.

(7) It is configured to remove and wash foreign matters fixed by ultrasonic waves, so it is easy and quick and clean to remove and wash foreign matters where it is difficult to remove and wash while ultrasonic waves touch the edges or corners where cleaning tools do not touch. .

1 is a perspective view showing one example of a wire discharge machine equipped with a washing apparatus for a wire discharge machine according to [Example 1] of the present invention.
2 is a plan view showing one example of a wire discharge machine equipped with a washing apparatus for a wire discharge machine according to [Example 1] of the present invention.
3 is a block diagram briefly showing the configuration of a washing apparatus for a wire discharge machining machine according to [Example 1] of the present invention.
4 is a flowchart showing the operational flow of the washing apparatus for a wire discharge processing machine according to [Example 1] of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. Prior to this, terms or words used in the specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly define the concept of terms in order to best explain their invention. In accordance with the principle that it can be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

In the cleaning apparatus for a wire electric discharge machine according to [Example 1] of the present invention, as shown in Figs. 1 to 4, the processing liquid bath 10 which fills the processing liquid so that the electric discharge workpiece is immersed and makes the wire electric discharge processing. At least one ultrasonic wave generation element 21 under the control of the controller 20 is mounted on the configuration.

In particular, the controller 20 is configured to remove the foreign matter and the like stuck in the processing liquid tank 10 by generating an ultrasonic wave through the ultrasonic wave generating element 21 when the wire discharge processing machine does not discharge processing, For cleaning or removing foreign matters, the cleaning or removing foreign matters can be performed without stopping the operation of the wire electric discharge machine completely. It is possible to improve the quality by increasing the effect of removing foreign substances stuck to the workpiece.

In addition, the present invention uses a controller for controlling the overall wire discharge processing machine to the controller 20, it is possible to minimize the additional configuration because it can be controlled by adding a program part of the existing controller.

And when the ultrasonic wave generating element 21 is installed in the processing liquid tank 10, since it is mounted at a position capable of evenly irradiating ultrasonic waves throughout the inside of the processing liquid tank 10, such as each corner, corners and sides facing each other, Through the processing liquid tank 10, the foreign material removal effect can be improved further.

Hereinafter, this configuration will be described in more detail with reference to the accompanying drawings. Since the present invention is a configuration related to a device for mounting on a wire electric discharge machine to remove washing and foreign matters, the configuration of the wire electric discharge machine will be briefly described and the configuration of the present invention will be described.

[ wire  Electric Discharge Machine]

As shown in Fig. 1 and Fig. 2, the wire electric discharge machine includes a processing liquid tank 10 for receiving a predetermined amount of the processing liquid to submerge the electric discharge workpiece for wire electric discharge machining. At this time, the processing liquid tank 10, as shown in Figure 1 and 2, through the processing liquid supply means (S) to filter and circulate the processing liquid supplied from the outside to perform a wire discharge processing. .

In addition, the wire electric discharge machine includes a discharge machining head (H) as shown in FIG. 1 and FIG. Discharge machining head (H) is to discharge the wire while using the discharge reel on the one side with the processing liquid tank 10 described above, and the wire is wound with a rolling reel on the other side to make the discharge machining It is a head produced by a conventional technique.

The wire electric discharge machine thus formed has the electric discharge workpiece submerged in the processing liquid tank 10 filled with the processing liquid as shown in FIGS. 1 and 2, and then the wire electric discharge machining is performed through the electric discharge machining head H. do.

Ultrasonic wave generation device

2 and 3, the ultrasonic wave generating element 21 is mounted in the processing liquid tank 10 described above and oscillates ultrasonic waves in the processing liquid filled in the processing liquid tank 10 to process the processing liquid tank ( 10) It is possible to remove foreign substances stuck on the bottom or corners.

At this time, the ultrasonic wave generation element 21, when the discharge workpiece is immersed in the processing liquid, so that the ultrasonic wave is also transmitted to the discharge workpiece to separate the foreign matter attached to the discharge workpiece and to discharge to the outside through the processing liquid supply means It is preferable to configure so that wire electric discharge machining quality may be improved.

The ultrasonic wave generating element 21 may be used as long as it can oscillate ultrasonic waves and clean the inside of the processing liquid tank 10 through the processing liquid. The ultrasonic wave generating element 21 may use an ultrasonic generator used in water, but may be used as long as it does not use underwater, so that only the oscillation part is submerged in the processing liquid to safely generate ultrasonic waves. have.

On the other hand, the ultrasonic wave generating element 21, as shown in Fig. 2 and 3, in consideration of the size and the like of the processing liquid tank 10, the ultrasonic wave can reach the processing liquid tank ( It is preferable to use at least one attached to 10). In the figure, an example in which four are mounted at one corner and two facing each other is shown, but is not limited thereto.

In addition, in consideration of the oscillation direction of the ultrasonic wave, the ultrasonic wave generating element 21 is preferably mounted such that ultrasonic waves can reach the entire processing liquid. 2 and 3, for example, when mounted to the corner portion of the processing liquid tank 10, it is mounted so as to be a right triangle with both sides and the side to be mounted on the side of the processing liquid tank 10 Shows an example in which ultrasonic waves are oscillated in a direction perpendicular to the sides.

<Controller>

The controller 20 controls the above-mentioned ultrasonic wave generating element 21 to oscillate ultrasonic waves as shown in FIGS. 3 and 4.

In particular, as shown in FIG. 4, the controller 20 controls the ultrasonic wave to be generated only when the wire discharge processing is performed, and not to generate the ultrasonic wave when the wire discharge processing is not performed. If the foreign matters generated during the wire discharge machining are left as they are, they are fixed in the processing liquid tank 10, and such foreign matters do not adhere to the processing liquid tank 10 in the gap time when the wire discharge processing machine does not work. This is to keep the processing liquid clean at all times without removing any foreign matter stuck to it. In addition, the foreign matter is filtered through the processing liquid supply means (S) before being fixed in the processing liquid tank 10 to be discharged to the outside to be cleaned in a short time, as well as to further increase the washing effect and filtration effect. To do this.

Here, "when the wire electric discharge machine is not in operation" refers to a time when the wire electric discharge machine does not discharge the electric wire without substantially interrupting the electric wire electric wire machining such as a time when the electrician is working on the wire electric discharge machining. Therefore, when the wire discharge processing is started again after the break time is controlled so as not to generate the ultrasonic waves.

In addition, the controller 20 may be used in addition to a new configuration constituting the washing apparatus for a wire discharge processing machine according to the present invention, it is usually most preferred to use a controller to control the overall wire discharge processing machine. This is because it is easy to know whether or not the wire electric discharge machine is performing wire electric discharge machining, and it can be further configured to perform the function of the washing device by adding a little program to the existing controller without additionally configuring the controller separately. to be.

Of course, when the controller 20 is added and configured separately, a separate sensor capable of receiving a signal regarding the operation of the wire discharge processing machine or checking the operation of the wire discharge processing machine through a controller that controls the overall wire discharge processing machine. The addition of such a configuration will be readily apparent to anyone skilled in the art.

In the cleaning apparatus for a wire electric discharge machine according to the [Example 2] of the present invention, since the mounting position of the ultrasonic wave generating element varies depending on the same configuration as the above [Example 1] or the type of the wire electric discharge machine, the difference here. Explain only about.

Wire electric discharge machines are typically divided into wet and dry. In the wet process, the wire discharge machining is performed while the discharge workpiece is immersed in the processing liquid. In the dry method, the wire discharge processing is performed while the discharge workpiece is not immersed in the processing liquid, but is ejected to the discharge processing point. At this time, the dry type is provided with the processing liquid tank separately, and circulates the processing liquid so as to eject to the wire discharge position.

Thus, in the second embodiment of the present invention, by attaching the ultrasonic wave generating element to the processing liquid tank in the wet wire electric discharge machine, it is possible to remove foreign matters that may be attached or fixed inside the processing liquid tank.

10: processing liquid tank
20: controller
21: ultrasonic generator
H: EDM head
S: processing liquid supply means

Claims (4)

In the wire discharge processing machine for depositing the discharge workpiece in the processing liquid tank 10 to control the discharge machining head (H), wire cutting,
At least one ultrasonic wave generating element 21 is mounted to the processing liquid tank 10 to operate under the control of the controller 20,
The controller 20 to operate the ultrasonic wave generating element 21 only when the wire cutting with the discharge machining head (H) does not clean the processing liquid tank 10,
The ultrasonic wave generating element 21 is installed in each corner of the processing liquid tank 10, so that the ultrasonic wave generated from the ultrasonic generating element 21 is irradiated toward the inner center of the processing liquid tank 10 or ; Inside each of the corners of the processing liquid tank 10 formed in a rectangular shape, two ultrasonic generators 21 to face each other to generate ultrasonic waves, the other two ultrasonic generators 21 are ultrasonic Cleaning apparatus for a wire discharge processing machine, characterized in that installed so as to be irradiated toward the inner center of the processing liquid tank (10).
In the wire discharge processing machine including a processing liquid tank for filtering and circulating the processing liquid so as to spray the processing liquid to the discharge workpiece placed on the table, the wire cutting by controlling the discharge machining head,
At least one ultrasonic wave generating element mounted on the processing liquid tank and operated under the control of a controller,
The controller operates the ultrasonic wave generating element 21 only when the wire cutting is not performed by the discharge machining head to clean the inside of the processing liquid tank.
The ultrasonic wave generating element 21 is installed at each inner corner of the processing liquid tank, and installed so that ultrasonic waves generated by the ultrasonic generating element 21 are irradiated toward the inner center of the processing liquid tank; Inside each of the corners of the processing liquid tank having a rectangular shape, the two ultrasonic generating elements 21 to face each other to generate ultrasonic waves, the other two ultrasonic generating elements 21 is ultrasonic processing liquid Washing apparatus for a wire electric discharge machine, characterized in that installed so as to be directed toward the center of the tank.
delete The method of claim 1 or 2,
The controller 20,
Cleaning apparatus for a wire electric discharge machine, characterized in that the controller for controlling the entire electric wire electric discharge machine for controlling the electric discharge machining head (H).

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