KR200339805Y1 - Tap remover - Google Patents

Abstract

The present invention relates to an apparatus for removing damaged tabs stuck in a workpiece. An apparatus according to the present invention, the magnet base capable of fixing the position on the object by the generation of magnetic force; A support shaft erected from the magnet base; A guide block installed on the support shaft so as to be lifted and lowered, and fixed at an arbitrary height; A guide unit installed on the guide block so as to be adjustable in a horizontal direction; Shanghai coaxial ascending and descending by the guide unit; A connection member installed at the lower portion of the shanghai coaxial to allow horizontal rotation and radial length adjustment; And a chuck installed at an end of the connection member to chuck the electrode for electric discharge machining. And a guide unit; A motor for generating a driving force; A ball screw rotated by the motor and installed in a vertical direction; The ball screw is moved up and down, and the shank coaxial is configured to include a nut block installed in the lower portion; Different electrodes are connected to the electrode and the object, and the tab of the object is removed by electric discharge machining.

Description

Tap remover

The present invention relates to a tab removing apparatus, and more particularly, to a tab removing apparatus capable of removing a tab or a tab inserted in a workpiece by using a discharge principle when a tap or a drill is broken during machining.

If the tap or drill breaks during machining, the broken tab or drill must be removed without damaging the workpiece. In the conventional method for removing such a tab or a drill (hereinafter collectively referred to as a tab), a separate tab is welded with a tab in a workpiece to be integrated and then removed while loosening a screwed relationship. . Alternatively, a method of removing by using a carbide drill or by manual removal such as a hammer is also used.

However, the conventional method as described above, of course, does not efficiently remove the tabs embedded in the object, and according to the above removal method, there is a concern that the object may be damaged.

The object of the present invention is to provide a tab removing device that can more efficiently remove broken tabs during tapping or drilling operations on a workpiece.

This object can be achieved by the technical idea that the tap removing device according to the present invention uses the discharge principle.

Figure 1a is a cross-sectional view showing the tab removal principle of the tab removing device according to the present invention.

Figure 1b is a cross-sectional view showing the tab removal principle of the tab removing device according to the present invention.

Figure 1c is a longitudinal cross-sectional view showing the tab removal principle of the tab removal device according to the present invention.

2 is a schematic front view of the device according to the present invention;

3 is a cross-sectional view of the device according to the present invention.

Figure 4 is a longitudinal sectional view of the device according to the present invention.

5 is a partial longitudinal cross-sectional view of the guide unit of the present invention.

Figure 6 is an exemplary perspective view of the connecting member and the chuck portion of the subject innovation.

7 is an exemplary view illustrating the operation of a couple of connecting members of the present invention.

8 is a partial front view of the guide unit of the present invention.

Explanation of symbols on the main parts of the drawings

10 ..... Magnet Base 12 ..... Support Shaft

14 ..... Guide Block 16 ..... Set Screw

20 ..... Guide Unit 24 ..... Shanghai Coaxial

26 ..... Nut Block 28 ..... Ball Screw

30 ..... Motor 32 ..... Connecting member

34 ..... Chuck

Tab removal device of the present invention for achieving the above object, and a magnet base that can be fixed to the object by the generation of magnetic force; A support shaft erected from the magnet base; A guide block installed on the support shaft so as to be lifted and lowered, and fixed at an arbitrary height; A guide unit installed on the guide block so as to be adjustable in a horizontal direction; Shanghai coaxial ascending and descending by the guide unit; A connection member installed at the lower portion of the shanghai coaxial to allow horizontal rotation and radial length adjustment; And a chuck installed at an end of the connection member to chuck the electrode for electric discharge machining. And the guide unit is; A motor for generating a driving force; A ball screw rotated by the motor and installed in a vertical direction; The ball screw is moved up and down, and the shank coaxial is configured to include a nut block installed at the bottom, by connecting different electrodes to the electrode and the object to be processed, it is possible to remove the tab of the object by the discharge machining.

In addition, a linear motion guide (LM guide) is provided between the nut block which moves up and down by the ball screw, and the inside of the guide unit, to guide accurate vertical motion.

And according to the embodiment, the shank coaxial is installed through the long hole formed in the connecting member is possible to adjust the length of the horizontal rotation and radial, the position can be fixed by the nut member is installed at the lower end It is configured to be.

And according to the embodiment, the Shanghai coaxial is installed through the long hole formed in the connecting member through the end cover; The end cover is composed of a collar portion located in the lower portion of the protrusion formed in the shank coaxial lower portion and a cylindrical portion inserted into the outer side of the shanghai coaxial and long construction, so as to insulate the electrical connection between the connecting member and the shank coaxial. have.

In addition, the guide block is installed in a state penetrating the support shaft can be moved up and down, it is preferable to be configured to be fixed to a predetermined position on the support shaft by a fixing screw screwed to the guide block.

Next will be described in more detail with respect to the present invention based on the embodiment shown in the drawings.

In the present invention, it is intended to remove the damaged tabs that are broken during processing of the object to be stuck in the object by using the electric discharge filter. Electrical discharge machining means that when a voltage is applied between the working electrode and the object to be processed and the electrode is close to each other, discharge occurs and a high temperature is generated to melt the workpiece, and at the same time, the molten residue is removed by vaporization of the insulating liquid. . As the gap caused by the removal of the residue increases, the electrode is finely transferred, and the screwed portion is released while the entire tab is cut through this process, so that the damaged tab can be removed.

The principle of the present invention will be described based on FIG. 1. First, the hatched portion in FIG. 1A means a damaged tab 4 broken inside the object 2. When the discharge machining is performed using the electrode rod 8 at the central portion of the damaged tab 4, the electrode rod 8 penetrates to the lower end of the damaged tab 4 while causing discharge. In this case, the damaged tab 4 will be separated into three pieces while a hole is formed in the center portion, and the screwed relationship between the object 2 and the outer circumferential surface will be released, and the tab pieces 4a separated in this way will be Illustrated in FIG. 1C.

1B shows a state in which the tab 4 having a large diameter is removed. The tab 4 having such a large diameter performs discharge processing downward while placing the electrode rod 8 near the edge of the tab. In the present working example, the electric discharge machining is performed at three positions of the tab 4 by using the electrode rod 8.

When discharge processing is performed in this way, the relatively large tab 4 is also divided into three parts, and as shown in FIG. 1C, the fragments 4a are formed, so that the damaged tab 4 can be removed from the workpiece.

Next will be described in more detail with respect to the device according to the present invention for removing the damaged tab through the above discharge processing.

The tab removing device according to the present invention includes a magnet base 10 capable of attaching the entire device to a magnetic material such as metal. The magnet base 10 is a portion for attaching the device of the present invention to be described later, by magnetic force, to the object to be processed containing the damaged tab. And the internal structure of the magnet base 10 itself is known, it is possible to generate a magnetic force by the operation of the switch, it can be attached to a magnetic material such as a metal workpiece. After the operation is completed, the magnet base 10 can stop the generation of magnetic force by the operation of the switch, it can be separated from the object.

The support base 12 is provided in the magnet base 10 so as to stand upright. The support shaft 12 is installed in a state where the guide block 14 penetrates. The guide block 14 is installed so as to penetrate the support shaft 12 to move up and down, and is configured to manually set the vertical position of the guide unit 20 to be described later.

The guide block 14 is provided with a fixing screw 16 so that the guide block 14 can be fixed to a predetermined position of the support shaft 12. The configuration for fixing the guide block 14 on the support shaft 12 by using the fixing screw 16 may be configured in various embodiments. As an example, as shown in FIG. 4, the screw 16a of the fixing screw 16 is installed to be screwed to the guide block 14. The position where the screw portion 16a of the fixing screw 16 is screwed is set to a position where the supporting shaft 12 is in contact with the portion through which the support shaft 12 penetrates. On the outer side of the screw portion 16a, a stopper 16b having a contact surface 16c capable of surface contact with the outer surface of the support shaft 12 is provided. Therefore, when the fixing screw 16 is tightened, the screw portion 16a is screwed into the guide block 14 and the stopper 16b enters the same time. Therefore, the contact surface 16c of the stopper 16b comes into contact with the outer surface of the support shaft 12, and when the fixing screw 16 is further tightened, a high frictional force between the contact surface 16c and the support shaft 12 is achieved. This occurs so that the guide block 14 can be fixed at a desired height on the support shaft 12.

In addition to such a configuration, it is a matter of course that many other modifications are possible to configure the guide block 14 to be supported at a constant height on the support shaft 12. For example, the end of the fixing screw 16 can contact the support shaft 12 directly or through another member having high frictional force, thereby stopping the guide block 14 at a predetermined height of the support shaft 12. It may be possible to configure it.

The guide unit 20 is installed on the side of the guide block 14. The guide unit 20 is preferably installed so as to be movable left and right with respect to the guide block 14. For example, as shown in FIG. 3, a moving shaft 22 is installed at one side of the guide unit 20, and the moving shaft 22 is inserted into the guide block 14 so as to be movable left and right. Configure. The guide unit 20 is installed to be movable left and right with respect to the guide block 14 by the moving shaft 22. The moving shaft 22 may be supported by the fixing screw 18 in a stopped state at a predetermined position. The structure of the fixing screw 18 can be made to have substantially the same structure as the fixing screw 16 described above.

The guide unit 20 is installed to move the electrode 8 up and down as described below, so that a predetermined discharge can be made between the object to be processed, to form an appearance with a predetermined casing, or the internal configuration It is configured to perform a predetermined frame function together to firmly support the part.

Next, the internal structure of the guide unit 20 will be described with reference to FIG. 3.

Inside the guide unit 20, a Shanghai coaxial 24 is provided. The shank coaxial 24 is installed so as to lower the chuck 34 at a constant speed in accordance with the degree of discharge substantially by moving the chuck 34 for chucking the electrode 8 to be described later. .

The shanghai coaxial 24 is installed to be lowered and raised to control the speed in the vertical direction. In the illustrated embodiment, the shank coaxial 24 is supported by a nut block 26. In addition, since the ball screw 28 is installed in the vertical direction at the center of the nut block 26, the nut block 26 moves at a constant speed in the vertical direction in accordance with the rotation of the ball screw 28. It becomes possible.

The ball screw 28 is connected to the motor 30 through a coupler 29. Accordingly, the nut block 26 is moved at a desired speed in the vertical direction through the ball screw 28 according to the forward and reverse rotation of the motor 30. The motor 30, it should be used that can be reversed rotation and control of the number of revolutions, according to the operation of the motor will be the Shanghai coaxial 24 will be lowered or raised at a predetermined speed.

Here, the Shanghai coaxial 24, as shown in Figure 1, should be installed so as to move in a vertical vertical direction in order to discharge the damaged tab in the longitudinal direction. Accordingly, in order to move the shank coaxial 24 vertically, a linear motion guide unit L between one side of the nut block 26 (left side of the drawing) and one inner side of the guide unit 20. It would be desirable to install the), and the configuration of this part is shown in an enlarged view in FIG. The linear motion guide unit (L), by guiding the nut block 26 to move up and down inside the guide unit 20, will help the nut block 26 to perform the correct vertical movement will be. And the linear motion guide unit (L) (LM guide) itself may be implemented in any structure known at present. In addition, the lower end of the ball screw 28 is configured to support the rotation by the bearing 27 is installed on the bottom portion of the guide unit 20.

Next, referring to FIGS. 3 and 6, the configuration of the lower portion of the shank coaxial 24 and the chuck 34 will be described. The lower portion of the shanghai coaxial 24 is connected to the connecting member 32 installed in the horizontal direction. The connecting member 32 is installed in a horizontal direction, and is rotatable in a horizontal direction with respect to the shank coaxial 24 and is installed to be movable in a radial direction (left and right directions in the drawing of FIG. 3).

Looking at a specific configuration, the long hole (32a) in the left and right longitudinal direction is formed in the center of the connecting member (32). The lower end of the shank coaxial 24 is installed through the long hole 32a, and is screwed with the nut member 25 at the bottom thereof. The lower end of the shank coaxial 24 is configured to be screwed with the nut member 25 at a predetermined position in a state where the lower end of the shanghai coaxial 24 penetrates the long hole 32a of the connecting member 32. In the above, the end cover 25a is inserted in the upper part of the long hole 32a, and the collar 25b is inserted in the lower part of the long hole 32a. Since the end cover 25a is supported at the lower portion of the projection 24a protruding radially from the lower portion of the shank coaxial 24, when the nut member 25 is screwed to the lower end of the shank coaxial 24, Substantially, the shank coaxial 24 is able to fix the connecting member 32 in the state penetrating the long hole (32a).

The end cover 25a is provided therebetween so that the connecting member 32 and the shank coaxial 24 do not directly contact each other, and are formed of an insulating material. That is, the end cover 25a is composed of a collar portion positioned below the protrusion 24a and a cylindrical portion formed in a cylindrical shape so as to surround the lower end of the shank coaxial 24. The connecting member 32 and the Shanghai coaxial 24 are configured to not directly contact.

And Ca in Figure 2 is a control cable for sending and receiving a predetermined signal by connecting the device of the present invention with a controller, and reference numeral Cb is a power cable for applying a power for electrical discharge machining.

In addition, the lower end of the shank coaxial 24 is installed to pass through the long hole (32a) of the connecting member 32, in the state that the nut member 25 is not tightened, the connecting member 32 is Shanghai coaxial ( It is possible to rotate in the horizontal direction and to move radially (left and right in FIG. 3) with respect to 24), and this state of movement is exemplarily shown in FIG. When the nut member 25 is tightened in such a state that the connecting member 32 is rotated in a horizontal direction or linearly in the horizontal direction, the connecting member 32 is stopped at a predetermined position and firmly supported. will be.

The chuck 34 is fixed below the outer end of the connecting member 32. The chuck 34 is a part for chucking the electrode rod 8 for electric discharge machining.

And in order to adjust the vertical movement interval of the Shanghai coaxial 24, an adjustment screw 24b is coupled to the Shanghai coaxial 24. As shown in FIG. 8, the adjustment screw 24b is provided so as to protrude toward the front of the slot 20c formed with a predetermined length in the vertical direction from the front of the casing of the guide unit 20. As shown in FIG. And the scale is attached to the front surface of the casing of the guide unit 20, it is possible to adjust the depth of the discharge machining.

The adjusting screw 24b provided on the shanghai coaxial 24 is moved downward during discharge processing. And a limit switch (Sw) is provided on one side of the lower end of the guide unit 20. Therefore, the adjustment screw 24b provided at a predetermined position of the Shanghai coaxial 24 is lowered as the Shanghai coaxial 24 descends, and when the adjustment screw 24b is lowered by a set depth, it contacts the limit switch Sw. Done. When the limit switch Sw is in contact with the adjustment screw 24b to generate a predetermined signal, the motor 30 stops driving and rotates in the reverse direction to move the shank coaxial 24 upward. . At this time, it is natural that the electrical discharge machining with the object to be processed is completed.

And the power cable (Cb) of Figure 2, is disposed downward through the inside of the guide unit 20, the (-) pole is connected to the connecting member 32, the (+) pole is connected to the workpiece. do. Therefore, when the electrode 8 approaches the damaged tab and maintains a predetermined interval, processing can be performed while the discharge as described above occurs.

Next, the overall operation of the tab removing device of the present invention having the above configuration will be briefly described.

First, the power is turned on in the state in which the power cable is connected to the above-mentioned connecting member 32 and the processing object, respectively. After the magnet base 10 is positioned at a predetermined position of the object to be processed, the magnet base 10 is switched on so that magnetic force is generated so that the magnet base 10 can be completely fixed at the position.

Next, by using the fixing screw 16, the overall height of the guide block 14 and the guide unit 20 is primarily adjusted. By rotating the motor 30 a certain number, the distance between the electrode rod 8 and the object can be finely adjusted.

And before performing the electric discharge machining which removes a damaged tab, the processing depth of the electrode rod 8 which moves up and down by the shank coaxial 24 should be adjusted. This processing depth can be adjusted by adjusting the setting position on the adjusting screw 24b, thereby regulating the degree of downward movement of the Shanghai coaxial shaft.

When the power is supplied in such a state, a discharge occurs between the object to be processed and the electrode 8, and the discharge is generated for a certain height, so that the tab embedded in the object is partially removed, as shown in FIG. As it is removed, it will be fragmented and able to be removed from within the workpiece.

Within the scope of the basic technical idea of the present invention as described above, many other modifications are possible to those skilled in the art, as well as the present invention should be interpreted based on the appended claims.

According to the present invention as described above, by using the electric discharge machining, it will be possible to more efficiently remove the tab in the object to be processed. In addition, as described above, the apparatus of the present invention is substantially attached to the object to be processed, etc., and it is also expected to be convenient in use that it is possible to adjust the depth of the left and right, up and down, and the discharge machining within a certain range.

Claims (6)

A magnet base capable of fixing a position on an object by whether magnetic force is generated; A support shaft erected from the magnet base; A guide block installed on the support shaft so as to be lifted and lowered, and fixed at an arbitrary height; A guide unit installed on the guide block so as to be adjustable in a horizontal direction; Shanghai coaxial ascending and descending by the guide unit; A connection member installed at the lower portion of the shanghai coaxial to allow horizontal rotation and radial length adjustment; And a chuck installed at an end of the connection member to chuck an electrode for electric discharge machining; The guide unit is; A motor for generating a driving force; A ball screw rotated by the motor and installed in a vertical direction; The ball screw is moved up and down, and the shank coaxial is configured to include a nut block installed in the lower portion; The tab removing device for removing the tab of the object to be processed by electric discharge machining by connecting different electrodes to the electrode and the object. 2. The tab removing device according to claim 1, wherein a linear motion guide (LM guide) is provided between the nut block which moves up and down by the ball screw and the inner side of the guide unit to guide the correct vertical motion. . According to claim 1, The coaxial shaft is installed in the state through the long hole formed in the connecting member is possible to adjust the length in the horizontal rotation and radial direction, the position can be fixed by the nut member installed at the lower end Tab removal device, characterized in that the. According to claim 3, wherein the Shanghai coaxial is installed through the long hole formed in the connecting member through the end cover; The end cover is composed of a collar portion located in the lower portion of the protrusion formed in the shank coaxial lower portion and a cylindrical portion inserted into the outer side and the long work of the Shanghai coaxial, characterized in that it insulates the electrical connection between the connecting member and the shank coaxial Tab removal device. The method of claim 1, wherein the guide block is installed in the state penetrating through the support shaft can be raised and lowered, tab removal, characterized in that fixed to a predetermined position on the support shaft by a screw screwed to the guide block Device. The tab according to claim 5, wherein a stopper is provided on the outer side of the screw portion of the fixing screw in contact with the support shaft, and the stopper is in close contact with the support shaft when the fixing screw is screwed to fix the guide block. Removal device.