KR910001844Y1 - Apparatus for moving electrode in electrical discharge machine - Google Patents

Abstract

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Description

Electrode holder device for electric discharge boring machine

1 is a perspective view of a conventional electric discharge machine in which the present invention is installed.

Figure 2 is a cross-sectional view showing the configuration of the device of the present invention.

3 is a partially exploded perspective view of FIG.

4 and 5 are partial side and rear views of FIG. 2, and FIG. 4 is a side view of a single threaded bolt fastening portion.

5 is a rear view of the clamp and the micro-rotation angle fastening portion.

* Explanation of cold symbols in the main part of the drawings

7: RAM 8: Insulator

9 housing 10 drive motor

l0 ': Axis 12: Bearing support column

12a: fastening portion 13: the rotating plate

13a: Rotating support part 13b, 13c: Screw groove

13d: thread portion 13e: fastening piece

13f: guide groove 14: thrust ball bearing

16: tightening nut 17: tilting rotating plate

17a: Tapered upper surface 17b: Engaging protrusion

17c: spherical contact surface 17d: through hole

17e: Guide groove 17f: Slide groove

17,17h: fastening pin 18: support bolt

18a: spherical contact portion 18b: screw portion

18c: head 19: adjustment bolt

20: ball 21: slide plate

2la: Slide groove 22.23: Eccentric adjustment screw

24: electrode holder 26: clamp and fine rotation control means

27: clamp 27a: protrusion

28: fine rotation control belt

The present invention relates to an electrode holder device of the electric discharge machine, and more particularly to an electrode holder device that can be easily set the electrode, boring discharge processing is possible.

Conventionally, the electrode holder device of the electric discharge machine in which the workpiece is discharged by the electrode fixed to the chuck by coupling the inclination adjusting mechanism with the support bolt to the bottom of the fine rotation control mechanism whose upper part is fixed to the ram bottom of the electric discharge machine is available for public use. Known in Korean Patent Application Publication No. 88-14839, the inclination adjustment mechanism fixed to the lower surface of the chuck is coupled to the support bolt at the center of the rotating plate, and inclined to several screw holes formed around the center of the inclination adjustment mechanism. Tighten the adjustment bolt vertically to loosen the inclination adjustment bolt and tighten it so that the inclination adjustment mechanism is tilted in the x and y directions so that the inclination can be adjusted. Insert the rotation induction plate having the protrusion into the inside of the support cover. Rotating plate combined with the rotating plate as the rotational induction pipe is rotated and tightened by adjusting the rotational induction plate with a microrotating control bolt inserted from the outside of the A reclining mechanism adapted to be rotated by slight adjustment angle.

However, in the conventional electrode holder device, since the spherical contact portion of the support bolt and the spherical contact end portion of the inclination adjustment bolt for connecting the tilt adjusting mechanism to the pivoting plate are not in the same line, If you adjust the inclination of the other axis after adjusting the inclination, the smooth operation does not work, and the x and y-axis inclination must be gradually adjusted over a number of times, so the adjustment work is cumbersome and difficult.

In particular, the electrode holder device was not provided with a means for rotationally driving the chuck and the electrode fixed thereto, and a means for reversing the chuck and the electrode, and thus could not be bored.

In addition, the micro-rotation control mechanism has a problem that can not be easily separated and combined as a structure that is always coupled to the inside of the support cover.

On the other hand, the electric discharge machine is known to discharge the electrode while rotating the electrode by the driving force of the drive motor, which is to install the drive motor outside the electrode holder device and transmit the driving force to the belt to rotate the electrode In the electric discharge machine of the type, the center of gravity of the driving motor is not matched with the center of gravity of the ram, so the center of gravity of the ram is unbalanced, which makes it difficult to perform precision machining. Since the inclination adjustment mechanism and the x and y axis eccentric movement mechanism for adjusting the degree are not provided, it is difficult to simplify the electrodes and also has a problem in that the discharge boring cannot be performed.

The present invention devised to solve all the defects and problems according to the electrode holder device of the conventional electric discharge machine as described above, by tilting the tilting rotating plate coupled to the lower part of the housing by the left and right and front and rear inclination adjustment bolt of the electrode The verticality of the workpiece can be easily set, and the electrode holder coupled to the lower part of the tilting rotary plate is used to adjust the eccentricity with respect to the drive shaft of the electrode by using the left and right, front and rear eccentric adjustment bolts, and in the adjusted eccentric position. By rotating the electrode to enable boring discharge machining, one electrode can process holes of different diameters and a large number of holes, and a drive motor for rotating the electrode is provided inside the housing. Built-in removes the inhibitory factors of precision machining due to the imbalance of the center of gravity, and the outer peripheral surface of the rotating plate and the upper The clamp and the micro-rotation angle adjusting mechanism are detachably fixed to the outer circumferential surface of the bearing support column so that they can be separated during boring discharge processing and can be combined and used during vertical discharge processing. If it described in detail with reference to Figure 5 as follows.

1 is a perspective view of an electric discharge machine in which the present invention is adopted, and the electric discharge machine has a rank 3 on which a working liquid is placed on a work table 2 of the machine body 1. The electrode holder device 5 according to the present invention is fixed to the lower end of the ram (not shown in FIG. 1) embedded in the upper ram box 4, and the electrode 6 is fixed to the electrode holder device 5. It is.

FIG. 2 is a cross-sectional view of the electrode holder device according to the present invention, and FIG. 3 is an exploded perspective view of the in-phase, and FIG. 4 is a partial left side view of FIG. 2 as shown therein, with an insulator 8 interposed at the lower end of the ram 7. The electrode driving motor 10 is fixed to the inner central portion of the housing 9 which is fixed by the fixing bolt 11 to the fixing bolt 11, and the number of bearing support columns 12 is fixed to the lower end of the housing 9. It is fixed by the two fixing bolts 11, the rotating plate 13 is connected to the shaft 10 'of the drive motor 10.

The rotating plate 13 is formed with upper and lower screw grooves 13b and 13c in the axial direction of the rotary support portion 13a protruding upward in the center thereof so that the drive shaft 10 'is screwed into the upper screw groove 13b. The thrust ball bearing 14 is inserted up and down between the outer circumferential surface of the rotary support 13a and the inner circumferential surface of the bearing support column 12, and the bearing support washer 15d on the upper threaded portion 13d of the rotary support 13a. ) And the bearing fastening nut 16 are fastened so that the rotating plate 13 can rotate by the driving force of the motor 10.

In addition, the outer support surface of the bearing support column 12 and the rotary plate 13, the clamp and the micro-rotation control means for fixing the rotary plate 13 and the bearing support column 12 and the micro-rotation control of the rotary plate 13 in the circumferential direction (26) This is detachably fastened (refer FIG. 5).

The adjusting means 26 is driven when the motor 10 is driven in accordance with a machining operation to separate the rotating plate 13, and when the rotation of the rotating plate 13 is not required, it is fastened as shown. use.

The lower side of the rotating plate 13 is connected to the support plate 18 is a rotating plate (hereinafter referred to as tilting rotating plate) 17 is adjustable tilt.

The support bolt 18 is formed in the upper and lower portions of the spherical contact portion 18a and the screw portion 18b and the head portion 18c are integrally formed, and the tilting rotating plate l7 has a tapered upper surface 17a and a locking portion 17b. Is formed integrally with a through hole (17d) having a spherical contact surface (17c) on the upper side, the support bolt (l8) is inserted from the lower side through the through hole (17d) of the tilting rotary plate 17 The threaded portion 18b is fastened to the lower threaded groove 13c of the rotary plate 13, and its spherical contact portion 18a is in contact with the spherical contact surface 17c of the tilting rotary plate 17 to open the tilting rotary plate 17. It can be tilted arbitrarily.

Reference numeral 19 is a control bolt for adjusting the tilting rotary plate 17 to an arbitrary inclination and fixed to the adjusted position, the adjustment bolt 18 of the four fastening pieces 13e formed on the outer periphery of the rotary plate 13 The ball 20 is supported on the inner end of the support bolt 18 and the two opposite to the x, y axis, that is, the left and right axis and the forward and backward axis, respectively, respectively fastened to the screw groove and orthogonal to the rotation center of the support bolt 18. Spherical guide grooves 17e formed so as to correspond to the upper and lower surfaces of the tilting rotating plate 17 and the rotating plate 13 are arranged so as to be positioned substantially on the same line as the spherical contact portion 18a of (18). Are respectively inserted into 13f).

Therefore, by unfastening the left and right or front and rear adjustment bolt (l9), the left and right or front and rear inclination angle of the tilting rotating plate 17 is adjusted.

For example, if you want to tilt the tilting turn plate 17 to the right than shown, loosen the right adjusting bolt l9 and tighten the left adjustment bolt 19. Then, the tilting turn plate 17 moves to the right with respect to the y axis. It will tilt.

A slide groove 17f is formed on the lower surface of the tilting rotary plate 17 as described above, and the slide plate 21 is inserted therein so as to be movable in the x-axis direction, and a fastening piece 17g fixed to both ends of the slide groove 17f. The left and right eccentric adjustment screws 22 for sliding the slide plate 21 in the left and right directions are respectively fastened to the screw grooves of the screw grooves.

A slide groove 21a orthogonal to the slide groove 17f is formed on the bottom surface of the slide plate 21, and the electrode holder 24 is formed to be movable in the y-axis direction, and both ends of the slide groove 21a are formed. Front and rear eccentric adjustment screws 23 for sliding the electrode holder 24 in the front and rear directions are respectively fastened to the screw grooves of the fastening piece 17h protruding from the outer circumferential edge of the titting rotary plate 17 so as to be positioned at. 25 shows the electrode fixing screw.

5 is a rear view showing the configuration of the clamp and the fine rotation control means 26, as shown in this, the clamp 27 is fixed to the outer peripheral surface of the rotating plate 13 with a fixing screw, bearing support column 12 The micro-rotation adjusting bolts 28 having end portions in contact with the protrusions 27a of the clamps 27 are fastened to both fastening portions 12a formed to correspond to the clamps 27 at the outer periphery of the clamps 27.

In this way, the present invention rotates the tilting rotating plate 17 to tilt the electrode holder 24 so that the electrode 6 fixed to the electrode holder 24 is maintained to be exactly perpendicular to the workpiece, and the slider 21. And by adjusting the electrode 26 fixed to the electrode holder 24 by moving the electrode holder 24 to the eccentric position with respect to the drive shaft 10 'and then adjusting the electrode 26 to the eccentric position by the driving force of the motor 10. (6) is rotated to perform boring discharge processing.

Specifically, the processing operation will be described in detail. First, the electrode 6 is fixed to the electrode holder 24, the vertical angle of the electrode 6 is confirmed, and then the left and right inclination adjustment bolts l9 are loosened and tightened. The x-axis verticality of (6) is fixed, and then the y-axis vertical state of the electrode 6 is corrected by loosening and tightening the front and rear inclination adjustment bolts 19 so that the electrode 6 is kept perpendicular to the workpiece. Then, by driving the drive motor 10 to rotate the electrode 6 at low speed by adjusting the eccentric adjustment screw 22 (23) the slide plate 21 and the electrode holder 24 in the x-axis, y-axis direction The boring discharge process is performed after the electrode 6 is eccentrically adjusted with the driving shaft 10 'by moving by a predetermined dimension according to the object to be processed.

This boring discharge processing is possible because the electrode 6 is processed while rotating with the driving force of the drive motor 10 while the electrode 6 is held in an eccentric position with respect to the drive shaft 10 '.

On the other hand, when the driving motor 10 is to be stopped and vertical discharge machining is performed, the clamp 27 is fixed to the tilting rotary plate 17, and then the rotary plate 13 is horizontally positioned by tightening the fine rotation adjusting bolt 28. Rotate at to adjust the rotational position of the electrode 6, loosen the tilt adjusting bolt 19 and tighten the tilting rotating plate 17 by tightening to adjust the verticality of the electrode 6, and then the electrode 6 The electric discharge machining is performed while descending vertically.

The present invention as described above, the left and right or front and rear sides fastened horizontally to the spherical contact portion 18a of the vertical support bolt 18 connecting the rotating plate 13 and the tilting rotating plate 17, respectively, to the x and y axes. Since the ball 20 of the inclination adjustment bolt 19 has a structure in which the center is located on the same line, the inclination of the tilting rotating plate 17 and the electrode holder 24 is easily adjusted to adjust the vertical degree of the electrode 6. It can be set accurately, and the electrode 6 is eccentrically adjusted with the drive shaft 10 'by sliding the slide plate 2l and the electrode holder 24 by using the eccentric adjustment screws 22 and 23, and driving Since the electrode 6 is rotated by the driving force of the motor 10, boring discharge processing is possible. Accordingly, even when the sizes are different and the same, the electrodes are eccentrically moved and rotated as much as the electrode consumption when processing many holes. Large amount with one electrode The process can be.

In addition, the present invention has a built-in drive motor 10 for rotating the electrode (6) in the housing (9) is installed so that the center of gravity is not biased, it is possible to perform precise work, the clamp and the fine rotation control means (26) Since the bearing support column 12 is coupled to the outer circumferential surface of the rotating plate 13, the bearing support column 12 can be easily attached and detached as necessary.

As a result, the present invention can easily boring discharge by adjusting the inclination and rotation of the electrode and eccentricity in the x and y-axis directions so that a large number of holes can be processed with one electrode, and holes of different sizes can be processed. It is possible to simplify the shape of the electrode and reduce the amount of electrode usage, there is an advantage that can reduce the setting time of the electrode by a simple configuration.

Claims (3)

In the electrode holder device in which the electrode holder 24 is installed in the lower part of the ram 7 of the electric discharge machine so as to allow fine rotation and tilt adjustment, the housing 9 fixed to the lower end of the ram 7 with an insulator 8 interposed therebetween. The electrode driving motor 10 is fixed to the inner central part, and the bearing support column 12 is fixed to the lower end of the housing 9, and the rotary support part 13a of the rotary plate 13 is inserted at the lower part thereof to support the rotary support part ( The shaft 10 'of the drive motor 10 is fastened to the upper screw groove 13b of 13a, and a thrust ball bearing 14 is inserted between the bearing support column 12 and the inner and outer circumferential surfaces of the rotary support 13a. In addition, the washer 15 and the nut l6 are fastened to the upper threaded portion 13b of the rotary support 13a, and the tapered upper surface 17a and the locking protrusion 17b are integrally formed, and at the same time, the central through hole 17d is provided. The tilting rotary plate 17 having the spherical contact surface 17c formed on the upper side of the spherical contact surface 17c with the spherical contact surface 17c. Fixing the upper and lower portions of the upper portion (18a) to the lower portion of the rotating plate 13 by a support bolt 18 formed integrally with the screw portion (18b) and the head portion (18c) fastened to the screw groove (13c), The screw grooves of the four fastening pieces 13e formed at the outer circumferential edge of the rotating plate 13 are fastened to each of the inclined adjustment bolts 19 opposite to the xy axis intersecting at the center of rotation so as to be fixed to the inner ends thereof. Spherical guide grooves 17e and 13f formed so that 20 is positioned on substantially the same line as the spherical contact portion 18a of the connecting bolt 18 and corresponding to the upper and lower surfaces of the tilting rotating plate 17 and the rotating plate 13. The ball 20 is inserted into each of the boring process, characterized in that the lower surface of the tilting rotating plate 17 is fixed to the electrode holder 24 so as to be eccentrically adjusted to the drive shaft 10 ' Electrode holder of electric discharge machine. The method of claim 1. The clamp 27 is detachably fixed to a fixed portion of the outer circumferential surface of the rotating plate 13 by a fixing screw, and both fastening portions 12a formed on the outer circumferential surface of the bearing support column 12 are connected to the protrusion 27a of the clamp 27. Electrode holder device of the electric discharge machining machine capable of boring, characterized in that the end is in contact with the fine rotation control bolt 28 is configured to fasten. The screw groove of the fastening piece (17g) according to claim 1, wherein a slide groove (17f) is formed on the lower surface of the tilting rotary plate (17), the slide plate (21) is inserted therein, and is fixed to both ends of the slide groove (l7f). Fasten the left and right eccentric adjustment screws 22 respectively. The electrode holder 24 is inserted into the slide groove 21a formed orthogonal to the slide groove 17f on the lower surface of the slide plate 21, and the body stratum 17h formed at the outer periphery of the tilting rotating plate 17 is provided. Electrode holder device of the electric discharge machining machine capable of boring, characterized in that the front and rear eccentric adjustment screw 23 is fixed to the screw groove of the.