KR100795973B1 - Electric discharge machine drill with a movable intermediate supporter - Google Patents

Abstract

An electric discharge machine drill is provided to support accurately an intermediate portion of an electrode by permitting an intermediate supporter to move in accordance with the movement of the electrode. An electric discharge machine drill includes a work table on which a workpiece is set, a transfer unit for moving an electrode(105) set on the table, a head(107) arranged at one side of a Z-axis transfer table(104) such that the head is movable in a vertical direction, a rotary spindle(106) arranged beneath the head and engaged with the electrode, and a controller for controlling operation of the machine drill. The machine drill further includes an intermediate supporter(10) for supporting an intermediate portion of the electrode. The intermediate supporter includes a guide body(40), a movement distance adjustment unit, and a support unit(50). The guide body moves along the Z-axis transfer table. The movement distance adjustment unit permits the guide body to move along the movement of the head, and adjusts the movement of the guide body such that the volume of the movement of the guide body becomes half of the movement of the head. The support unit has one end connected to the guide body so as to support the intermediate portion of the electrode.

Description

ELECTRIC DISCHARGE MACHINE DRILL WITH A MOVABLE INTERMEDIATE SUPPORTER}

1 is a front view showing the structure of the intermediate support when the machining electrode of the discharge machining type drill apparatus having a movable intermediate support according to an embodiment of the present invention is located at the top;

Figure 2 is a front view showing the structure of the intermediate support when the processing electrode of the discharge machining type drill apparatus having a movable intermediate support according to an embodiment of the present invention is located at the bottom,

Figure 3 is a front view showing the structure of the intermediate support of the discharge machining type drill apparatus having a movable intermediate support according to an embodiment of the present invention,

Figure 4 is a partial perspective view showing the structure of the support of the discharge machining type drill apparatus provided with a movable intermediate support according to an embodiment of the present invention,

5 is a perspective view showing a conventional electric discharge machining type drill apparatus.

<Description of Symbols for Major Parts of Drawings>

10: middle support 20: wire

30: pulley 40: guide body

50: support 52: first support

54: second support part 56: support hole

104: Z-axis feeder 105: processing electrode

106: rotary spindle 107: head

108: support

The present invention relates to a discharge machining type drill apparatus, and more particularly, to a discharge machining type drill apparatus having a movable intermediate support that always supports the middle of the working electrode without a separate driving device using a moving pulley.

In general, discharge processing is a method of processing materials by using physical, mechanical, and electrical action generated when a discharge is generated between two electrodes.Pulse discharge is repeated by inserting a processing electrode and a workpiece into an insulating processing liquid. When melted or scattered a part of the workpiece by electron impact, it is a kind of processing to a desired shape.

[0003] There are a variety of products in the electric discharge machine using the electric discharge machining method such as a mold discharge machine using a total electrode and a wire electric discharge machine using a wire electrode.

Among such electric discharge machines, an electric discharge machine drill (EDM drill) for processing a very small hole or groove in a workpiece is shown in FIG. 5, where the workpiece W is connected to the jig J. The work table 100 to be mounted, the working electrode 105 disposed on the upper side of the work table 100, and X, Y, which moves the working electrode 105 three-dimensionally along the X, Y, and Z axes; Z-axis feeder (102, 103, 104), the head 107 is installed on one side of the Z-axis feeder 104 to move in the vertical direction, rotatably connected to the lower portion of the head 107 and the processing electrode 105 is bitten The rotary spindle 106, and a control unit for controlling the overall operation.

With this configuration, when a direct current power source is applied to the working electrode 105 and the work table 100, a discharge pulse is repeatedly generated between the working electrode 105 and the work W, so that the hole in the work W is processed. do. During processing, the processing electrode 105 is rotated by the rotary spindle 106 to support the end of the processing electrode 105 through the support 108 formed in the lower portion of the Z-axis feed table 104. .

In addition, when processing a hole or groove of a small diameter on the workpiece by the discharge machining type drill apparatus, the head 107 is continuously moved downward because the processing electrode 105 is continuously consumed.

However, the conventional electric discharge machining type drilling apparatus only supports the end of the processing electrode 105 through the support 108 formed on the lower side of the Z-axis feed table 104. In addition, since the processing electrode 105 is not firmly fixed to the entire longitudinal direction, a problem arises in which an intermediate portion of the elongated processing electrode 105 is shaken off the central axis of the electrode by centrifugal force due to rotation.

So, in order to solve this problem, an intermediate support for supporting the middle part of the processing electrode 105 is installed, but when the fixed intermediate support is installed, the head 107 is not only a big limitation in moving in the Z-axis direction. However, many of the parts other than the middle part have not been solved.

The present invention has been invented to solve the above problems, in order to always support the middle of the processing electrode without installing a separate drive unit, to provide an electric discharge machining type drill apparatus having a movable intermediate support using a pulley For the purpose of

In order to achieve the above object, the present invention provides a discharge machining type drill device consisting of the following configuration.

A head which is installed on one side of a work table on which a work piece is placed, a transport table for moving a work electrode disposed on an upper side of the work table, and a Z-axis transport table for moving the work electrode up and down, and which is moved up and down, In the discharge machining type drill apparatus comprising a rotating spindle that the processing electrode bites, and a control unit for controlling the overall operation,

Further comprising an intermediate support for supporting the intermediate portion of the processing electrode,

The intermediate support,

A guide body moving along the Z axis feeder;

A movement distance adjusting means for interlocking the movement of the guide body with the movement of the head and adjusting the movement amount of the guide body to be half of the movement amount of the head;

Discharge machining type drill apparatus provided with a movable intermediate support, characterized in that the guide body is connected to one end to support the middle of the processing electrode.

The intermediate support is preferably coupled to the drive shaft of the Z-axis feeder. The Z axis feeder also includes an LM guide for guiding the movement of the head. The intermediate support is connected to the LM guide as well as the drive shaft to guide the movement.

In this case, one end is hinged to the guide body and the other end abuts or is separated, and the contact surface is formed of a first support part and a second support part having support holes penetrated up and down; An air cylinder is provided on the guide body to allow the first support portion and the second support portion to abut or separate by using the hinge coupling. The air cylinder corresponds to each other based on the support hole on an abutting surface of the first support portion and the second support portion. It is preferable that the recessed part and the convex part are provided so that the recessed part and the convex part are engaged when the first support part and the second support part contact each other. According to such a structure, a 1st support part and a 2nd support part can contact an electrode one by one, and can support an electrode more reliably.

Further, when the guide body moves to the lower end of the Z-axis feeder, it is more preferable that the contact surface of the first support part and the second support part is automatically opened by the air pressure of the air cylinder.

On the other hand, the movement distance adjusting means is not particularly limited, and may be a device that allows the guide body movement amount to be half of the head movement amount. In a preferred embodiment, the movement distance adjusting means includes a wire having one end fixed to an upper portion of the Z axis feeder and the other end fixed to the head; And a pulley which is connected to the wire and the guide body and moves by half of the head movement amount by the wire when the head moves in the Z-axis direction. However, other various means may be employed by those skilled in the art. For example, the movement distance adjusting means may be a gear assembly that connects the head and the guide body and converts 1/2 of the movement amount of the head into the movement amount of the guide body.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing the structure of the intermediate support when the processing electrode of the discharge machining type drill apparatus having a movable intermediate support according to an embodiment of the present invention is located on the top, Figure 2 is a mobile type according to an embodiment of the present invention When the machining electrode of the electric discharge machining type drill apparatus having an intermediate support is located at the bottom, it is a front view showing the structure of the intermediate support.

The intermediate support 10 of the electric discharge machining type drill apparatus provided with the movable intermediate support according to the present embodiment includes a wire 20, a pulley 30, a guide body 40, and a support 50.

In a preferred embodiment the intermediate support 10 is coupled to a drive shaft (not shown) of the Z-axis feeder 104. The Z-axis feeder 104 also includes an LM guide for guiding the movement of the head 107. And the intermediate support 10 is connected to the LM guide as well as the drive shaft is guided in its movement.

Figure 3 is a front view showing the structure of the intermediate support of the discharge machining type drill apparatus provided with a movable intermediate support according to an embodiment of the present invention.

The wire 20 has one end 22 fixed to the upper portion of the Z axis carriage 104 and the other end 24 fixed to the head 107, and the middle portion of the wire 20 along the Z axis carriage 104. Sagging

The pulley 30 is connected to the middle portion of the wire 20. Only one side of the pulley is installed on the fixed wire, and if the other end of the unfixed wire is moved up and down, the pulley moves up and down by half of the amount of wire end movement, but the force required to move the wire is small. Therefore, when the head 107 moves up and down along the Z-axis feed table 104 in the present invention, the pulley 30 moves up and down by half of the moving amount of the head 107 along the head 107. At this time, when the pulley 30 is moved downward, the pulley and the pulley and the parts connected to the pulley are naturally moved, and when moving upward, the head 107 is moved by the driving force. Therefore, no separate driving force is required for the movement.

One side of the guide body 40 is connected to the pulley 30 and the other is connected to the support part 50 to guide the intermediate support 10 to move along the LM guide of the Z-axis feeder 104.

Figure 4 is a partial perspective view showing the structure of the support of the discharge machining type drill apparatus having a movable intermediate support according to an embodiment of the present invention.

The support part 50 includes a first support part 52 and a second support part 54, and the other end of the first support part 52 and the second support part 54 so that one end is in contact with or separated from the guide body 40. Is hinged to In addition, the support hole 56 which is vertically penetrated is formed in the center of the surface where the first support portion 52 and the second support portion 54 opposite to the hinge coupling portion are in contact with each other. This makes it easier to insert the processing electrode 105 into the support hole 56 in the case of replacing the processing electrode 105.

On the surface where the first support portion 52 and the second support portion 54 abut, “V” shaped recesses 57a and 57b and convex portions 58a and 58b corresponding to each other with respect to the support hole 56 are formed, respectively. When the first support part 52 and the second support part 54 come into contact with each other, the first support part 52 and the second support part 54 support the processing electrode 105 without being misaligned with each other.

In addition, an air cylinder (not shown) for moving the hinged portions of the first support portion 52 and the second support portion 54 to abut or separate the first support portion 52 and the second support portion 54 may include a guide body (not shown). 40). The air cylinder (not shown) opens the contact surface of the first support part 52 and the second support part 54 automatically when the guide body 40 moves to the lower end of the Z-axis feeder 104.

Referring to the operation of the discharge machining type drill apparatus having a movable intermediate support according to an embodiment of the present invention.

Before starting the work, the head 107 is positioned above the Z-axis feeder 104 as shown in FIG. 1, and one end of the working electrode 105 is pinched by the rotary spindle 106 and the other end is inserted into the support 108. .

At this time, the pulley 30 is positioned in the middle of the head 107 and the lower end of the Z-axis feed table 104 by the length of the wire 20, one end of which is connected to the head 107, the support hole 56 of the support 50 ) Is located midway between the lower end of the rotary spindle 106 and the support 108.

In addition, when the first support portion 52 and the second support portion 54 are engaged with the first support portion 52 and the second support portion 54 with the first electrode 52 and the second support portion 54 engaged, the process electrode 105 is supported. Inserted into the ball 56 and the support 50 supports the middle of the processing electrode 105.

When the working electrode 105 is rotated by the rotary spindle 106 when the operation starts, the electrode shakes because the intermediate support 10 supports the center of the gap between the lower end of the rotary spindle 106 and the support 108 Does not occur.

As the work progresses, the processing electrode 105 should be moved up and down due to the shape to be processed and the consumption of the processing electrode 105. For this purpose, the head 107 is moved along the Z-axis feeder 104.

At this time, according to the principle of the pulley, the intermediate support 10 always moves in the center of the gap between the lower end of the rotary spindle 106 and the support 108 to support the processing electrode 105. For example, when the upper end of the processing electrode 105 is 200 mm high, the intermediate support 10 supports the processing electrode 105 at a height of 100 mm, and the upper end of the processing electrode 105 is 100 mm high. When lowered, the intermediate support 10 supports the processing electrode 105 at a height of 50 mm.

In addition, as shown in FIG. 2, when the guide body 40 moves to the lower end of the Z-axis feed table 104, an air cylinder (not shown) provided in the guide body 40 is automatically made of the first support part 52 and the first support part 52. The surface where the two support parts 54 are in contact with each other is opened to prevent collision between the rotary spindles 106 and the intermediate support 10.

In the above, the present invention has been shown and described with respect to certain preferred embodiments. However, the present invention is not limited only to the above-described embodiment, and those skilled in the art to which the present invention pertains can make various changes without departing from the technical spirit of the present invention. Therefore, the scope of the present invention should not be limited to the specific embodiments, but should be construed as defined by the appended claims.

According to the electric discharge machining type drill apparatus provided with the movable intermediate support of the present invention, the intermediate support is moved without installing a separate driving unit, so that the structure of the device is simple and the production is easy and the production cost is reduced. But the effect is reduced.

In addition, by having a structure in which the intermediate support moves in conjunction with the movement of the process electrode, the intermediate support exerts an excellent supporting effect that the intermediate support always moves while supporting the middle of the process electrode accurately.

Claims (9)

A head which is installed on one side of a work table on which a work piece is placed, a transport table for moving a work electrode disposed on an upper side of the work table, and a Z-axis transport table for moving the work electrode up and down, and which is moved up and down, In the discharge machining type drill apparatus comprising a rotating spindle that the processing electrode bites, and a control unit for controlling the overall operation, Further comprising an intermediate support for supporting the intermediate portion of the processing electrode, The intermediate support, A guide body moving along the Z axis feeder; A movement distance adjusting means for interlocking the movement of the guide body with the movement of the head and adjusting the movement amount of the guide body to be half of the movement amount of the head; Discharge machining type drill apparatus provided with a movable intermediate support, characterized in that the guide body is connected to one end to support the middle of the processing electrode. The method according to claim 1, wherein the moving distance adjusting means, A wire having one end fixed to an upper portion of the Z axis feeder and the other end fixed to the head; And A discharge machining type drill having a movable intermediate support, which is connected to the wire and the guide body and comprises a moving pulley that moves by half of the head moving amount by the wire when the head moves in the Z-axis direction. Device. The method according to claim 1 or 2, And the intermediate support moves along the head drive shaft of the Z-axis feeder. The method according to claim 1 or 2, And an LM guide connected to the Z axis feeder, wherein the intermediate support is guided by the LM guide. The method according to claim 1 or 2, The support portion, each end is hinged to the guide body, the other end is configured to include a first support portion and a second support portion formed with a support hole for receiving the processing electrode when the other end can be contacted or separated from each other, And an air cylinder for allowing the first support portion and the second support portion to abut or separate by using the hinge coupling, wherein the guide body has a movable intermediate support. The method according to claim 5, The recessed portion and the convex portion corresponding to each other based on the support hole are provided on a surface where the first support portion and the second support portion contact each other, and the recessed portion and the iron portion are engaged when the first support portion and the second support portion contact each other. Discharge machining type drill apparatus with movable intermediate support. The method according to claim 5, When the guide body is moved to the lower end of the Z-axis feeder, the discharge machining type drill apparatus having a movable intermediate support, characterized in that the contact surface of the first support portion and the second support portion is automatically opened by the air cylinder. The method according to claim 1, wherein the moving distance adjusting means, And a gear assembly connected to the head and the guide body and converting half of the movement amount of the head into the movement amount of the guide body. The method according to claim 6, When the guide body is moved to the lower end of the Z-axis feeder, the discharge machining type drill apparatus having a movable intermediate support, characterized in that the contact surface of the first support portion and the second support portion is automatically opened by the air cylinder.

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