JPS5810427A - Discharge processing device - Google Patents

Abstract

PURPOSE:To attain efficient and highly precise processing of works of various shapes by realizing a movement in X, Y axial directions and swivelling in the directions of X-Z surfaces of a processing table and also a up and down movement in Z axial direction and swivelling in the directions of Y-Z surfaces of a processing head. CONSTITUTION:In a discharge processing device consisting of a processing table 9 on which a work 1-1 is placed and a discharging head 6 feeding a processing electrode 7, the processing table 9 can be moved in X(right and left), Y(front and rear) directions by means of driving motors 10, 11 and further can be swivelled along X(right and left)-Z(vertical) surfaces by means of a driving motor 12. Furthermore, the processing head 6 can be moved slantingly by means of a handle 14 and the like and also can be elevated in Z(vertical) direction by means of an elevating motor 15 and the like. Accordingly, through automatically controlling these drivings by means of NC controlling measures, a processing object on a processing table is processible without resetting its posture of placement.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the movement of an electric discharge machining apparatus, particularly a machining table on which a workpiece is placed, in the By making it possible to raise and lower the processing table, to rotate the processing table in the direction along the X-2 plane, and to tilt the processing head in the direction along the Y-Z plane, by manual or automatic control, The present invention relates to an electric discharge machining apparatus that performs electric discharge machining at a plurality of locations in a machining direction without resetting the mounting posture of a workpiece on a machining table.

As is generally known, electrical discharge machining devices are used in a wide range of machining fields, taking advantage of the excellent features of electrical discharge machining. In particular, it is possible to process efficiently regardless of the mechanical properties of the workpiece, such as hardness, tensile strength, work hardening properties, etc., and even when processing complex shapes, it is possible to use electrodes with a shape that corresponds to the shape to be machined. Because high-precision machining can be performed using this method, it is widely used in the field of machining the above-mentioned difficult-to-cut metals in addition to mold manufacturing. In electrical discharge machining, the ease of operation such as setting the feeding angle of the machining electrode and relative positioning of the machining electrode and the workpiece differs depending on the shape of the workpiece. Generally, electric discharge machining on a doughnut-shaped workpiece is relatively simple if the workpiece is rotated about the center every 1 machining. In particular, Figures 1 and 2
As shown in the figure, through holes 2.3, 4, 5, 3, 4.5 (
It is easy to process the through holes 2 (hereinafter referred to as 5'). Fig. 1 is a plan view of the workpiece l, Fig. 2 is a sectional view taken along the arrow A-A in Fig. 1, and the symbol O in Fig. 0 is the central axis of the workpiece l. The through holes 2...g are arranged in the centripetal direction with respect to the central axis 0 as shown in FIG. 1 and in the normal direction to the outer peripheral surface perpendicular to the circumference as shown in FIG. It has been poorly processed.

As mentioned above, it is clear that the through holes 2...5 shown in FIG. There is. That is.

B) A machining table with a width corresponding to the workpiece l is required. Therefore, the larger the diameter of the workpiece l, the larger the area of the machining table must be, which increases the size of the entire apparatus.

(b) Since the through holes 2...g are machined one by one, it takes a long time to complete the product tube.

In order to solve the above-mentioned problems, the workpiece shown in Figure 1 is divided into 1 tlr number of bootsta l-1, l-2, . It is considered that the material can be processed using That is, when dividing into one block, for example, if the machining is performed using one electrical discharge machining device, the machining time can be shortened to 11-/, and the machining table can also be made smaller. As a matter of course,
Block l of the workpiece 1f divided into 9 parts shown in Figure 1
This is because, as shown in FIG. 23 and FIG. 4, which show a plan view and a side view of -1, the number of through holes to be machined is divided into 0 and becomes smaller. however,
Since the penetration direction of each through hole is perpendicular to the circumferential direction and the direction perpendicular to the circumferential direction, as described above,
Everything is exciting. 9e.

There is a problem in that it is very difficult to set the feeding direction of the processing electrode.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems, and aims to provide an electric discharge machining apparatus that can shorten machining time and perform high electric discharge machining between machining edges. For this reason, one aspect of the present invention is an electric discharge machining apparatus that includes a machining table on which a workpiece is mounted and a machining head that feeds a machining electrode, and processes the workpiece using electric discharge energy.

An X-direction table drive means for moving the processing table in the left-right direction, that is, in the X direction, a Y-direction table drive means for moving the processing table in the backward direction, that is, in the Y direction, by the same <1ff, a table rotation means for rotating the processing table, and the processing head. At least the table rotating means rotates the table in the direction along the x-2 plane by automatic control, and the head The support section is characterized in that it is configured to support the processing head so as to be tiltable in a direction along the Y-Z plane.

This will be explained below with reference to the drawings.

54-5 is a front view of an embodiment of the electrical discharge machining apparatus of the present invention;
The 6th factor is a side view of the example shown in the *5 figure, and the off-line view is an explanatory diagram regarding the displacement amount setting of the illustrated embodiment and the working head shown in FIG. 5 and 6.

First. The names and operations of each part of the electrical discharge machining apparatus of the present invention will be explained with reference to Figures 5 and 6. In addition,
Block l-1, which is the workpiece, is the same as that shown in FIGS. 1 to 4. and.

The symbol 6 in the figure is a processing head. Pulse evening 8
The machining electrode 71i is fed in the direction of arrow 6 in the figure to perform electric discharge machining on the block l-1.

Reference numeral 9 denotes a processing table, which is moved in the direction of the arrow X in the figure by the motor IO. 1! The illustrated arrow Y is driven by the motor 11
The table rotation motor 12 rotates the table in two directions indicated by arrows in the figure.

Reference numeral 13 denotes a head support section that supports the processing head 6 and tilts the processing head 6 by operating the head tilting hand 71/141i. The processing head 6 is tilted in one direction shown by the arrow, and the head support 13 itself is raised and lowered by a motor 15 in two directions shown by the arrow, thereby raising and lowering the processing head 6 in the vertical direction, that is, in two directions.

Reference numeral 16 denotes a machining tank in which the push rod 1-1 is immersed in a machining liquid (not shown).

The main parts constituting the electric discharge machining apparatus of the present invention, that is, the machining head 6. Although the operations of the machining table 9 and the head support part 13 have been described, the discharge of the present invention will be explained in connection with machining a through hole as shown in the block 1-1 shown in FIGS. The overall operation of the nn equipment will be explained below.

Before explaining the above-mentioned comprehensive operation, the position and direction of the through hole to be machined in the workpiece, book l-1, will be explained.

^, The position of the above-mentioned through hole on the outer peripheral surface of block l-1 is a position that satisfies the following (A-1) td and (A-2).

(A-1) First, as shown in FIGS. 3 and 4, a line that is parallel to the 0 circumferential direction, that is, the X direction shown in the drawing, and intersects a plane perpendicular to the central axis 0, that is, a dashed-dotted line. Illustrated with n
The arc (IV)...(1 piece...(■)) is located on the arc (I) of radius R(1).

An arc of radius R (If) and (II'),...
・It is located above.

(A'-2), and the arrangement position in the direction intersecting the X direction is on a line intersecting the plane passing through the central axis Of. If fR is through hole 5-4. ....

2-4. ..., 5'-4 is 2 in the diagram passing through the central axis 0 above.
The through hole 5-5 is located on a line intersecting the plane of the direction.・・・
・, 2-5. ..., 5'-5 is the above 5-4°...
It lies on a line that forms a central angle # with respect to a plane passing through . . . and intersects a plane passing through central axis 0.

03) Next, the penetrating direction of the through hole is the centripetal direction with respect to the central axis O, in other words, n is the circular arc (mV)...(
1)...Normal direction to (F/), and the second direction
As shown in the diagram, the plane passing through the central axis Of and the block 1-1
normal to the line that intersects the outer circumferential surface of

As mentioned above, the overall operation of the electrical discharge machining apparatus of the present invention is described in block l-1 shown in FIGS. 1 to 4.
This will be explained in relation to the case where a through hole is fabricated that satisfies the above conditions.

First, as shown in FIG. 1-1f'A'4, the object to be processed is placed on the processing table 9 so that the circular arc, for example (I), is along the X direction of the processing table 9.

This state is illustrated in FIGS. 5 and 6 4).

(17 arc < 1) Through holes 2-1 to 2-
When processing 7.

(1) Processing of the through hole 2-4 among the through holes 2-1 to 2-7.

When the block 1-1 is placed on the machining table 9 as described above and the machining chill pull 9 is kept horizontal, the direction of the through hole 2-4 is perpendicular to the surface of the machining table 9. X direction.

It is perpendicular to anything in the Y direction. ve.

Machining can be carried out in such a way that the feeding direction of the machining electrode 7 is perpendicular to the surface of the machining table 9. To do this, the motor 12 is used to make the machining table 9f horizontal and the machining head 6 is rotated for head tilting. Operate the handle 14 and set it so that it is perpendicular to the Y direction (in the electrical discharge machining apparatus of the present invention, the machining head 6 is always
(perpendicular to the direction), at this time, the processing table 9 is moved in the X direction or the Y direction by the actuators 10 and 11, and the feeding direction of the processing electrode 7 is set in the direction to be processed. Needless to say, it should match the position of the through hole 2-4.

Note that 1 circular arc (through holes 2-1 or 2- existing on 11)
In machining 7, all machining is performed without changing the feeding direction of the machining electrode 7.

(2) Processing of the through hole 2-3.

The relative relationship between the machining head 6 and the machining table 9 will be described with reference to the off-line diagram (5), in which the relative relationship between the machining head 6 and the machining table 9 is changed as follows based on the state of the machining (1). In the off-diagram ^, 9 illustrated arrows, I (1) represent the feeding direction of the processing electrode 7 in processing (1), breath represents the shortest distance between the rotation center S of the processing table 9 and the circular arc (1), and other Numbers correspond to other figures.

The arc (1) in which the feeding direction a (1) of the processing electrode 7 coincides with the through hole 2-4 indicates the state in the above-mentioned processing (1).

(2-1) As shown in FIG. 3, since the central angle between the zero through holes 2-4 and 2-3 is θ, move the processing table 9 in the direction indicated by the arrow in FIG. (clockwise) by an angle θ. the result.

As shown in the off-line diagram, from the state of the above-mentioned processing (1), the circular arc (11 is (X)' 0 through hole 2-3 is 2-3
'0 respectively.

(2-2) Next, the through hole 2-
3, the processing table 9 is moved in the X direction shown in FIG. It is determined by the following formula.

ΔX=(R(Il-jri・dm#...)
...(1) The position and the position 2-5 of the through hole 2-3 are 2
Since there is a difference of Δ2 in the direction, the head support portion 13 is raised by the above-mentioned Δ2 in the direction of the arrow 2 shown in the figure 54-6 (in this case, in the positive direction). In addition.

As is clear from 5t-713!1lCAt, Δ2 is determined by the following equation. That is.

ΔZ-(R(Il-1)-(R(1)-1) ・cma
= (R(I)-jri (1-a#)...
・・・・・・・・・(2) After changing the relative positional relationship between the processing head 6 and the processing table 9 as explained in (!-1) or above, the processing electrode 7f is
By performing electric discharge machining while feeding the material in the direction of arrow 6 (I) in the off-diagram, the desired through hole 2-3 can be formed.

(3) l! In addition, the other through holes 2-1.2-2.2-5 to 2-7 existing on the arc (1) can also be processed in the same manner as the process (2).

■ Next, the through hole 3-1 or 3 existing on the 0 arc ■)
The processing for -7 will be explained. In addition.

This machining will be explained based on the aforementioned machining (1), that is, the machining state of the through holes 2-1 to 2-7 existing on the circular arc (1). Therefore, prior to the explanation, the through holes 3-1 to 3-
7 and the through holes 2-1 to 2-7 existing on the arc (Il) described above will be clarified.

(1) In Fig. 2, through hole 2- on the arc (1)
The through holes 2 are shown in a representative form from 1 to 2-7t, and the through holes 3 are shown in a representative form to represent the through holes 3-1 to 3-7 on the circular arc. As shown, through holes 2-A to 2-7 on one arc (1) and the arc [[
) Adjacent through holes 3-1 to 3-7 above, that is, through holes 2-1 and 3-1, through holes 2-2 and 3-2.・・・
The angle of the penetration direction of ...... should be α.

The radius of the above circular arc (I) with respect to the central axis 0 is R (1)
, whereas the radius of one arc stroke is R(It).

Therefore, based on the above differences, the following (41 and (5))
The rest may be carried out in accordance with the above processing (1).

That is.

(4) Based on the above difference (1), when machining the through hole 3-4, for example, the feeding direction a(1) of the machining electrode 7 in the machining of the through hole 2-4 in the case of the above machining (11)
With reference to f, the processing head 6 is moved in one direction of the arrow shown in FIG.
(in this case, clockwise) by an angle α. below,
The off view @), which will be explained with reference to the fang 7 diagram @), assumes that the through holes 2-4 and 3-4 exist on the same arc with the point Pf as the center. The above processing (I
) at the center of tilting of the processing head 6 (not shown in Figure 6).
(corresponding to the tilting center S' of the processing head 6).

De represents the radius from the center point P to the surface of the block 1-1, and h represents the distance from the tilting center S' (Il to the through hole 2-4).

Although it has already been mentioned that the processing head 6 is tilted by the angle α, in order to process all the through holes on the circular arc tap, including the 9 through holes 3-4, in the desired direction, the processing head 6 must be tilted by the angle α.
By changing the relative position Ili'f between and the processing table 9, *7
As shown in Figure 6), the center of tilt of the machining head 6 must be displaced from S' (■) to t (II). To do this, the machining table 9 must be moved in the direction of the arrow Y in Figure 6 ( In this case, it is only necessary to move the head support part 138 years old by the amount of ΔV shown in the figure (in the negative direction) and lower it by the amount ΔS shown in the figure (in the negative direction in this case). Furthermore, the amount of displacement indicated by ΔV and Δ1 above is determined by the following formula:
(off figure) is clear. That is.

Δy=cr+h)・iα ・・・・・・・・・(3)Δ
Liao-(r+4) (1-槙α)...(4) Also,
The respective displacement amounts explained in item (4) must not change the relationship between machining all of the through holes 3-1 to 3-7 on the arcuate side.

(5) Based on the above difference (11), the above processing (1)
The processing corresponding to (2-1) and (G3) in
(If)1. : Replaced with ΔX.

It is only necessary to find the displacement amount corresponding to Δ2 and Δ2.

As mentioned above, the processing for the through holes 2-1 to 2-7 existing on the circular arc (11) shown in FIGS. The processing for 3-7 was explained in (■) above, but
Similarly, 9 arcs (lit), (IV) and (6
It is also possible to perform the machining of each of the above through-holes one after the other.

Regarding the electrical discharge machining apparatus of the present invention, the following is related to the case where a block l-1 as shown in FIGS. However, it is also possible to automate each series of operations by automatically controlling them using, for example, NC control means.

Furthermore, the above description regarding the electric discharge machining apparatus of the present invention is
Although the description has been made in connection with the machining of the through hole in the block l-1 shown in FIGS.
Electrical discharge machining 9 for similar workpieces, for example, machining of tire molds, can also be carried out efficiently.

As explained above, according to the present invention, the processing table on which the workpiece is placed can be moved in the X (left and right) direction and the Y (after IF) direction, and the processing head can be moved up and down in the 2 (up and down) directions. By making it possible to rotate the processing table in the direction along the x-2 plane and tilt the processing head in the direction along the Y-Z plane by manual or automatic control, the workpiece 21111 on the processing table can be rotated. To provide an electric discharge machining device capable of performing electric discharge machining efficiently and with high machining accuracy by making it possible to perform electric discharge machining at multiple locations with different machining directions without resetting the mounting posture of a body. be able to.

[Brief explanation of the drawing]

Figure 1 is an overall plan view of a donut-shaped workpiece, which is a premise of the workpiece for explaining the workpiece to be machined using the electric discharge machining apparatus of the present invention, and Figure 2 is an illustration of the workpiece shown in Figure 1. Arrow A-
A sectional view at A, FIG.
FIG. 4 is a side view taken along arrow B-B in FIG. 3, FIG. 5 is a front view of an embodiment of the electric discharge machining apparatus of the present invention, and FIG. Front view and off view are Fang 5
FIG. 6 shows an explanatory diagram regarding the illustrated implementation and the displacement amount setting of the processing head. In the figure, 1-1 is a block, 2 to 5 and 3 to 5
' is a through hole. 6 is the processing head. 7 is the processing electrode. 8 is a pulse motor, 9 is a processing table. 10 is an X-direction table drive motor, 11 is a Y-direction table drive motor, and 12 is a table rotation motor. 13 is a head support part, 14 is an I/endor for head tilting,
Reference numeral 15 represents a motor for lifting and lowering the head, and reference numeral 16 represents a processing tank. Patent Applicant: Discharge Precision Machining Research Institute Co., Ltd. Representative Patent Attorney Mori 1) Hiroshi (2 others) O'7 (△) Ritsu 7 Cause (8)

Claims (1)

[Claims] In an electric discharge machining apparatus that includes a machining table on which a workpiece is placed and a machining head that feeds a machining electrode, and processes the workpiece using electrical discharge energy, the machining table is moved in the left-right direction, that is, in the X direction. An X-direction table driving means, a Y-direction table pivoting means for similarly moving the table in the front-rear direction, that is, the Y direction, a table rotation means for rotating the processing table, and a table rotation means that supports the processing head in a tiltable manner and moves in the vertical direction, that is, in two directions. At least the table rotation means rotates the table in the direction along the x-2 plane by automatic control, and the head support unit rotates the processing head in the Y-Z plane. An electric discharge machining device characterized in that it is configured to be supported so as to be tiltable in a direction along the line.