JP3517289B2 - EDM holder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder of an electric discharge machine for mounting an electrode for electric discharge machining of a workpiece or a workpiece to be subjected to electrical discharge machining. 2. Description of the Related Art When an electrode or a work is mounted on a spindle, it is necessary to perform positioning in the X and Y axes with respect to the spindle axis. This is done by the double dovetail mechanism. [0003] However, the sliding with the dovetail structure not only complicates the structure, but also has a drawback that the play of the sliding portion causes a positional deviation, which makes it difficult to obtain the positioning accuracy. is there. In addition, in the case of positioning with screws, displacement occurs due to backlash, so that fine adjustment is difficult and time is required for work. According to the present invention, when an electrode or a work is mounted on a main shaft, positioning is not performed by sliding in the X and Y directions with respect to the main shaft axis, and the structure is simple. The object of the present invention is to obtain a holder for an electric discharge machine capable of easily performing positioning adjustment, and has the following configuration. ( 1 ) A holder of an electric discharge machine for mounting an electrode for performing electric discharge machining on a work or a work to be subjected to electric discharge machining to a main shaft and adjusting a mounting position of the electrode or the work, wherein the holder is A holder mounting portion for mounting a base plate of a holder to the main shaft, a mounting plate for mounting the electrode or the work, and provided between the base plate and the mounting plate, wherein the mounting plate is attached to the base plate by the axis of the main shaft. And a position adjustment block that adjusts the position of the electrode or the workpiece by moving the electrode or the work in two orthogonal directions perpendicular to the axis. The position adjustment block is fixed to the base plate.
A first flexible portion formed of a plurality of elastic thin plates formed by forming a plurality of through holes so as to be elastically deformable in the axial direction, and provided integrally with the first flexible portion via a moving portion; Said 2
A second flexible portion comprising a plurality of elastic thin plates formed by drilling a plurality of through holes so as to be elastically deformable in another axial direction in the other axial direction, and adapted to fix the mounting plate. A screw for pressing the first and second flexible portions, respectively, so as to elastically deform the mounting plate with respect to the base plate;
A holder for an electric discharge machine equipped with: According to the present invention, a flexible portion which can be elastically deformed in a direction perpendicular to the axis of the main shaft is provided between the base portion and the mounting portion of the holder. The rigidity is small and can be displaced in the direction perpendicular to the axis direction of the main shaft like a thin plate, and a member having high rigidity is adopted in the axial direction of the main shaft, and by pressing the flexible portion with a screw, Since the amount of elastic deformation in the pressing direction is adjusted to adjust the mounting position of the electrode or the work mounted on the mounting portion, fine adjustment of the required amount in the X and Y axis directions can be easily performed. Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a holder of the electric discharge machine according to the embodiment of the present invention, FIG. 2 is a view taken along the arrow A of FIG. 1 showing the holder of the electric discharge machine of the embodiment of the present invention, and FIG. It is a front view which shows the main shaft part of the die sink electric discharge machine provided with the holder of a processing machine. FIG. 3 shows an embodiment in which the electrode holder 3 of the present invention is mounted on a main shaft 9 of a die sinking electric discharge machine 7. The die sinking electric discharge machine 7 is mounted on a bed fixed to a floor surface (not shown), and is provided so as to surround a table 19 on which a workpiece 21 is placed, and a periphery of the table 19 via a seal 25. On the other hand, it has a processing tank 23 that can move up and down. Also, a saddle 17 that moves in the X-axis direction on a column (not shown) standing on the bed behind the table 19, a ram 15 that moves on the saddle 17 in the Y-axis direction, and a front surface of the ram 15 in the Z-axis direction. And a main shaft 9 that moves to The electrode holder 3 is attached to a chuck 13 provided at the lower end of the main shaft 9 via an insulating plate 11.
Is mounted via the electrode mounting plate 2 to the electrode mounting portion 5. In this way, the electrode 1 is relatively moved in the X, Y, and Z-axis directions with respect to the work 21 placed on the table 19, thereby performing the electric discharge machining of a desired shape on the work 21. FIG. 1 is a front view of an electrode holder 3 according to an embodiment of the present invention. A chucking plug 27 held by a chuck 13 provided at a lower end of a main shaft 9 and a position at the time of chucking are provided above the electrode holder 3. A pin 39 for adjustment is provided, and a base portion 31, a base portion 31,
The first flexible portion 33, the moving portion 35, the second flexible portion 37, the electrode mounting portion 5, and the electrode mounting plate 2 are provided at the lowest position. The electrode 1 is detachably fixed to the electrode mounting plate 2. The first flexible portion 33 and the second flexible portion 37 are arranged as shown in FIG.
As shown in FIG. 2, square holes are formed in parallel with each other leaving a thin portion 41 in a direction perpendicular to the axial direction of the main shaft 9 to provide rigidity in the axial direction of the main shaft 9. Since it is easy to be displaced in the direction perpendicular to the direction, the thin portion 41 functions as a flexible plate. Further, since the first flexible portion 33 and the second flexible portion 37 are perforated at right angles to each other, the electrode mounting portion 5 can be displaced in the X and Y axis directions with respect to the base portion 31. . As shown in FIG. 2, on both sides of the base portion 31, it is parallel to the thin portion 41 of the first flexible portion 33 and faces the moving portion 35 below the first flexible portion 33. Hanging arms 43 are provided, respectively, and pressing screws 47 provided with lock nuts 45 are screwed into positions facing both side surfaces of the moving portion 35, respectively. Further, as shown in FIG.
In the direction perpendicular to 43, on both sides of the moving section 35, a second flexible section 37
A hanging arm 49 which is parallel to the thin portion 41 and faces the electrode mounting portion 5 (corresponding to the moving portion 35) below the second flexible portion 37;
49 are provided, and pressing screws 53 having lock nuts 51 are screwed into positions facing both side surfaces of the electrode mounting portion 5, respectively. 1 and 3, the pressing screws 5 provided on the left and right hanging arms 49, 49 facing the electrode mounting portion 5 of the electrode 1 are shown in FIGS.
By adjusting the electrodes 3 and 53 and pressing the electrode mounting portion 5, the thin portion (flexible plate) 41 can be moved and displaced in the left-right direction in FIGS. Therefore, the thin part (flexible plate)
The electrode mounting portion 5 located below 41 is displaced in the left and right direction, and the electrode 1 attached to the electrode mounting portion can be moved in the left and right direction. Similarly, pressing screws 4 provided on the hanging arms 43, 43
When the moving portion 35 is pressed by adjusting the positions 7 and 47, the thin portion (flexible plate) 41 of the first flexible portion 33 is displaced in the direction perpendicular to the plane of the paper in FIGS. 1 and 3 (the horizontal direction in FIG. 2). be able to. Therefore, the moving part 35 located below the thin part (flexible plate) 41 can be displaced in a direction perpendicular to the plane of the paper, and the second flexible part 37 and the electrode mounting part 5 can be displaced in a direction perpendicular to the plane of the paper. . As described above, the pressing screws 47, 53
As a result, the first flexible portion 33 and the second flexible portion 37 can be independently displaced in the direction perpendicular to the axial direction of the main shaft 9, so that the electrode mounting portion 5 on which the electrode 1 is mounted is attached to the base portion 31. It can be easily moved in the X and Y axis directions. The holes formed between the thin portions (flexible plates) 41 formed in the flexible portions 33 and 37 are round, elliptical,
It may be formed in a parallelogram. Further, if the electrode mounting portion 5 is formed in a trapezoidal shape, the electrode mounting portion 5 basically moves in a direction perpendicular to the axis direction of the main shaft 9, performs a slight turning motion, and can finely adjust the mounting angle of the electrode 1 with respect to the axis of the main shaft 9. . Also,
The thin portions (flexible plates) 41 in the flexible portions 33 and 37 may be formed by another processing method, for example, welding of the flexible plates, without making holes. In short, the thin portion (flexible plate) 41 may have a structure that can be displaced in a direction perpendicular to the axis of the main shaft 9 and has rigidity in the axial direction of the main shaft 9. In this embodiment, the case where the workpiece 21 is processed by the electrode 1 mounted on the electrode mounting portion 5 of the electrode holder 3 mounted on the main shaft 9 in the die sinking electric discharge machine 7 has been described. A work 21 may be attached to the electrode mounting portion 5 of the holder 3 instead of the electrode 1, and the work 21 may be subjected to electric discharge machining by a wire electrode extending in a horizontal direction. According to the present invention, there is provided an apparatus having a relative position adjusting mechanism using the elastic characteristic of a thin portion (flexible plate). Since there is no friction portion (sliding portion), there is no positional deviation due to play of the sliding portion and no change over time in the relative position due to residual stress due to friction. In addition, because the elastic deformation of the flexible part is used, if the screw is released, it will return to its original state by its own repulsive force, so there is no play, and the adjustment is easy and high-precision positioning is possible. is there. Therefore, fine adjustment of the mounting position of the electrode or the work can be easily performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a holder of an electric discharge machine according to an embodiment of the present invention. FIG. 2 shows a holder of the electric discharge machine according to the embodiment of the present invention.
FIG. FIG. 3 is a front view showing a main shaft portion of a die sinking electric discharge machine provided with a holder of the electric discharge machine according to the embodiment of the present invention. [Description of Signs] 1 electrode 2 electrode mounting plate 3 electrode holder 5 electrode mounting portion 7 electric discharge machine 9 main spindle 13 chuck 19 table 21 work 23 processing tank 27 chucking plug 29 base plate 31 base portion 33 first flexible portion 35 move Part 37 second flexible part 39 pin 41 thin part (flexible plate) 43 hanging arm 47 pressing screw 49 hanging arm 53 pressing screw

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23H 7/26 B23Q 3/18

Claims (1)

(57) [Claim 1] In a holder of an electric discharge machine for mounting an electrode for performing electric discharge machining on a workpiece or a workpiece to be subjected to electrical discharge machining to a main shaft and adjusting a mounting position of the electrode or the workpiece. A holder mounting portion for mounting the base plate of the holder to the spindle; a mounting plate for mounting the electrode or the work; and a mounting plate provided between the base plate and the mounting plate; And a position adjustment block for adjusting the position of the electrode or the work by moving the position adjustment block in two orthogonal directions perpendicular to the axis of the main shaft. The position adjustment block is fixed to the base plate, and A first flexible portion including a plurality of elastic thin plates formed by forming a plurality of through holes so as to be elastically deformable in one axial direction; A plurality of elastic thin-walls formed integrally with the first flexible portion via a moving portion, and formed by forming a plurality of through-holes so as to be elastically deformable in the other one axis direction in the two-axis direction; A second flexible portion made of a plate and adapted to fix the mounting plate; and a screw for pressing the first and second flexible portions respectively to elastically deform the mounting plate with respect to the base plate. a holder as electric discharge machine characterized by comprising a.