JP2006212738A - Machining device and machining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary machining device capable of machining a linear hole with accuracy without causing misalignment in the case of machining a small diameter deep hole in a round bar workpiece by electric discharge machining or the like. <P>SOLUTION: The machining device 1 is provided with a grip part 10 for gripping the workpiece 17; a rotating part 9 rotatable with the grip part 10 mounted thereto; a driving part 11 for rotating the rotating part 9; and a main structure 23 forming the basic structure of the machining device 1. The rotating part 9 is rotatably supported through a bearing 21 in the main structure 23, and the driving part 11 is mounted to the main structure 23. Further, the main structure 23 is mounted on a sine bar 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a machining apparatus and a machining method, and more particularly to a machining apparatus and a machining method that are used by being incorporated in an electric discharge machining apparatus or an electric discharge machining method, such as an ejector nozzle for a refrigeration cycle. The present invention relates to a machining apparatus and method for rotating a workpiece to machine a small-diameter deep hole.

  Some ejector nozzles for refrigeration cycles can have a small diameter deep hole having a diameter of several millimeters and a length of several tens of centimeters. Such small diameter deep hole machining may be performed by electrical discharge machining. Machining small-diameter deep holes is difficult. For example, it is difficult to machine small-diameter deep holes straight into a round bar, and an apparatus capable of performing such machining with high accuracy is desired.

  An electric discharge machining apparatus having a function of rotating an electrode actually exists. FIG. 8 shows an outline of such a conventional electric discharge machining apparatus 20 and a method for machining a small-diameter deep hole. FIG. 8A shows a state where a small-diameter deep hole is machined in a round bar workpiece 17 by electric discharge machining. In this case, the electrode 56 has a pipe shape and is processed while rotating the electrode 56. The electrode 56 is fed toward the workpiece 17 by the electrode feeding mechanism 53 while being guided by the electrode gripper 51 at the upper part and the electrode guide 52 at the lower part. At the same time, the machining fluid passes through the pipe-shaped electrode 56 and is supplied to the machining location of the workpiece 17. In this manner, the small-diameter deep hole is machined by the electric discharge machining apparatus 20 of the conventional example.

FIG. 8B shows a state in which the processing has progressed and the electrode 56 has been sent out. If the electrode 56 is thin (that is, if the machining hole is thin), the rigidity of the electrode 56 is lowered, so that the protruding amount of the electrode 56 from the electrode guide 52 becomes long, and a misalignment occurs. As shown in FIG. 8B, the position of the hole is shifted from the hole position in the direction of the straight line indicated by the dotted line in the direction of the center shift indicated by the solid line.
Thus, in the electric discharge machining apparatus 20 of the conventional example, there is a problem that when the small-diameter hole to be machined becomes a deep hole, the hole bends (core misalignment between the inlet and the outlet).

  In addition, a special electric discharge machine with a free table actually exists, but there is no device for machining small-diameter holes (including a tapered shape) with different diameters on the back and front with a single chuck in the center of a round bar.

  The present invention has been made in view of the above-described circumstances. In particular, when a small-diameter deep hole is machined in a round bar work piece by electric discharge machining or the like, a straight hole is machined with high accuracy without causing misalignment. It aims at providing the processing apparatus which can do. The present invention solves the above problem by paying attention to the fact that electric discharge machining is performed while rotating a table (workpiece).

  Another object of the present invention is to provide a machining apparatus capable of machining oblique linear holes and tapered holes with high accuracy.

  According to the first aspect of the present invention, in order to achieve the above-described object, the processing device (1) is provided with a gripping part (10) for gripping a workpiece (17) and the gripping part (10). And a rotatable rotating part (9), a driving part (11) for rotating the rotating part (9), and a main structure (23) constituting the basic structure of the processing apparatus (1). . The rotating part (9) is rotatably supported by the main structure (23), and the driving part (11) is attached to the main structure (23), and can be easily attached to and detached from a general-purpose electric discharge machine. It is possible to do it.

  With this configuration, when a small-diameter deep hole or the like is processed in a workpiece such as a round bar, it is possible to process a linear hole with high accuracy without causing misalignment.

According to a second aspect of the present invention, there is further provided a transmission mechanism (12, 13) for transmitting the rotation of the driving portion (1) to the rotating portion (9) in the first aspect. And
According to this form, the structure of the processing apparatus of this invention is actualized more.

According to a third aspect of the present invention, in the first or second aspect, the rotating portion (9) is rotatably supported by the main structure (23) via a bearing (21). It is characterized by that.
According to this embodiment, the configuration in the vicinity of the rotating portion of the processing apparatus of the present invention is further embodied.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the grip portion (10) is a collet chuck.
According to this embodiment, the workpiece can be gripped with high directional accuracy.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the main structure (23) is mounted on a pedestal (2).
According to this form, the form which can remove the main structure from a base part is disclosed.

According to the sixth aspect of the present invention, in the form of the fifth aspect, the main structure (23) is provided with support columns (3, 3a, 3b) installed on at least one of the upper surface and the lower surface in the periphery. And further comprising support fixing members (4, 5, 24) for connecting the support columns (3, 3a, 3b) and the platform (2) so as to fix them. The processing apparatus according to claim 5.
According to this form, the structure in which the main structure is removable from a base part is disclosed.

In the form of Claim 7 of this invention, the number of the said support | pillars (3, 3a, 3b) installed in at least any one of the upper and lower surfaces of the said main structure (23) is three in the form of the said Claim 6. The pillars (3, 3a, 3b) are all cylindrical, and the three pillars (3, 3a, 3b) are substantially triangular. Here, the corresponding one of the supporting and fixing members (5) for fixing one of the three columns is provided with a surface having a V-shaped groove, whereby a circular column (3b) ) And the V-shaped groove is in contact with the column (3b) so as to restrain its movement, and one of the remaining columns (3) has a pressing groove (27). Since the support fixing member (24) for fixing the remaining one column (3) has a concave surface, the concave shape of the support fixing member (24) is formed. Two arm portions (24a, 24b) are fixed so as to be fitted into the pressing groove (27) of the support column (3) and held between the support columns (3), thereby fixing the support fixing member ( 24) is characterized in that it acts to suppress and fix the main structure (23).
According to the present embodiment, the configuration of the three-point support by the support column allows a certain amount of vertical and horizontal dimensional errors and position adjustment of the main structure, and ensures that it does not move in the vertical and horizontal directions, The embodiment for fixing the main structure to the pedestal is made more specific.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the processing device (1) grips the workpiece (17) by the grip portion (10). It can be used to process the back surface of the workpiece (17).
According to this embodiment, it is possible to process a deeper small-diameter deep hole with high accuracy, for example, by enabling processing from both sides while maintaining the state of gripping the workpiece.

According to a ninth aspect of the present invention, in any one of the fifth to eighth aspects, the block gauge (18) or the like is installed on the base (2) and the base (2). By inserting and installing between the mounting base (22), the base portion is inclined at a predetermined angle and used.
According to this embodiment, an oblique small-diameter deep hole can be machined at an accurate inclination angle by electric discharge machining on a workpiece such as a round bar.

According to a tenth aspect of the present invention, in any one of the first to ninth aspects, the electric discharge machining apparatus (20) is used.
According to this embodiment, the application of the present invention is further embodied.

In the processing method according to the eleventh aspect of the present invention, the gripping procedure for gripping the workpiece (17), the rotating procedure for rotating the gripped workpiece (17), and the rotating workpiece (17) And a machining procedure for machining the workpiece (17) by moving the tool toward the workpiece.
With this configuration, when a small-diameter deep hole or the like is processed in a workpiece such as a round bar, it is possible to process a linear hole with high accuracy without causing misalignment.

According to a twelfth aspect of the present invention, the method according to the first aspect further includes a reversing procedure for reversing the workpiece while holding the workpiece, and after performing the reversing procedure, the workpiece (17). In order to process the unprocessed surface, the rotation procedure and the processing procedure are performed.
According to this embodiment, it is possible to process a deeper small-diameter deep hole with high accuracy, for example, by enabling processing from both sides while maintaining the state of gripping the workpiece.

According to a thirteenth aspect of the present invention, in any one of the eleventh and twelfth aspects, the processing apparatus according to any one of the first to ninth aspects is used. .
According to this form, the structure which enables the processing method of this invention is actualized more.

In the form of Claim 14 of this invention, it is used when the small diameter deep hole is processed by electric discharge machining in any one of the forms of the said Claim 11-13.
According to this embodiment, the application of the present invention is further embodied.

  Hereinafter, an embodiment in which a rotary machining apparatus of the present invention is incorporated in an electric discharge machining apparatus will be described in detail with reference to the drawings. 1 to 6 schematically show a first embodiment of a rotary machining apparatus according to the present invention incorporated in an electric discharge machining apparatus, and FIG. 1 shows a preferred first embodiment of the present invention. FIG. 2 is a schematic partial side sectional view showing a schematic configuration of the rotary machining apparatus. FIG. 2 is a top view of the rotary processing apparatus 1 of FIG. 1 (viewed from the line X2-X2 of FIG. 3), and the sign bar 2 and the like at the lower part of the apparatus are omitted for easy understanding. 3 is a cross-sectional view taken along line X3-X3 in FIG. 2, and FIG. 4 is a drive air circuit diagram of the rotary machining apparatus 1 according to the first embodiment of the present invention. Further, FIG. 5 is a three-dimensional view for explaining the rotary machining apparatus 1 of the first embodiment in an easy-to-understand manner, and FIG. 6 is an exploded three-dimensional view of FIG.

  First, referring to FIG. 1, an outline of a rotary machining apparatus 1 incorporated in an electric discharge machining apparatus 20 including an electrode 56 is shown. The rotary processing apparatus 1 is for holding a workpiece 17 which is a round bar in the present embodiment, and is a rotation to which a chuck (gripping part) 10 such as a collet chuck used for gripping a tool such as a machining center and a chuck 10 are attached. A table (rotating unit) 9, a main structure 23 that is a basic structure of the rotary processing apparatus 1, and two bearings 21 that are installed in the main structure 23 and rotatably support the rotary table 9. The rotary processing apparatus 1 has a structure in which a rotating part such as a rotary table 9 is installed in a main structure 23, and the main structure 23 is mounted on a sine bar (base part) 2. As shown in FIGS. 5 and 6, the main structure 23 is provided with three pillars 3, 3 a, 3 b on the upper surface and the lower surface of the main structure in a triangular shape. , Pressed against the support fixing members 4 and 5 respectively bolted to the sign bar 2 and further tightened with bolts 25. The bolt 25 is screwed into a screw hole 26 provided in each of the columns 3a and 3b in the rear portion (refer to FIG. 1 or 2 for the front-rear direction). In fixing, the V-groove portion of the support fixing member 5 is pressed and fixed to the outer peripheral portion of the support column 3b. Further, as shown in FIGS. 5 and 6, the arms 24a and 24b of the concave portions of the supporting and fixing member 24 are fitted into the holding groove portions 27 of the front column 3 attached to the upper and lower surfaces of the main structure 23, and the sign bar is further tightened with bolts. Fix to 2. Such a configuration of three-point support by the support columns 3, 3 a, 3 b allows a certain degree of vertical and horizontal dimensional errors and position adjustment of the main structure 23, and finally the main structure 23 is vertically and horizontally Secure to the sign bar 2 so that it does not move in the direction. In the present embodiment, the lengths of the columns 3, 3a, 3b are such that the virtual plane connecting the vertices of the three columns and the axis of the rotary table 9 intersect perpendicularly. Further, the three struts have the same outer diameter.

According to the configuration as described above, the rotary processing apparatus 1 can be mounted 180 degrees reversed (upside down) so that the back surface of the workpiece 17 is processed. Processing is possible. At this time, since the opening 36 is provided in the center of the sine bar 2 as shown in FIG. 6, the rotary table 9 does not interfere with the sine bar 2 while holding the workpiece 17. 1 can be installed on the sign bar 2. Even in this case, the attachment method to the sign bar 2 of the main structure 23 of the rotary processing apparatus 1 using the support columns 3, 3a, 3b on the upper surface is the same as described above.
In the above configuration, the rotary table 9 is supported by two bearings corresponding to the loads from both directions in consideration of the reverse installation of the rotary processing apparatus 1, while supporting the loads in both directions by one bearing. Alternatively, a structure that is rotatably supported may be used. Further, in the present embodiment, the support columns 3, 3 a, 3 b are respectively attached to the upper and lower surfaces of the main structure 23, but may be configured to penetrate the main structure 23.

  In the present embodiment, the sign bar 2 further includes a table (a surface plate in the present embodiment) 22 of the electric discharge machining apparatus (machining equipment) 20 by the fixing members 7 and 8 and the auxiliary member 6 shown in FIGS. Fixed to. In this embodiment, after fixing the fixing members 7 and 8 to the table 22 with a predetermined size, the round bar portion 28 of the sign bar 2 is pressed against the front surface portion 33 of the fixing member 7 and tightened with the tightening member 30. It is carried out. Tightening by the fastening member 30 is performed by fastening the fastening member 30 to the fixing member 7 with a bolt. As shown in FIG. 3, since the pressing surface of the fastening member 30 is tapered, the round bar portion 28 of the sign bar 2 is fixed between the pressing surface of the fastening member 30 and the table 22 without any gap. I can do it. Next, for fixing the round bar portion 29 of the sign bar 2, the upper surface of the round bar portion 29 of the sign bar 2 is pressed by the pressing member 32 of the auxiliary member 6 on the fixing member 8 configured as shown in FIG. This is performed by tightening the auxiliary member 6 with a bolt or the like so as to be pressed by the portion 32. Such a fixing structure using the fixing members 7, 8 and the like allows the sine bar 2 to have a certain degree of vertical and horizontal dimensional errors and position adjustments, and finally allows the sine bar 2 to move vertically and horizontally. It is securely fixed to the table 22 so as not to move (see FIG. 5).

  On the other hand, the rotary machining apparatus 1 includes a pneumatic rotary actuator (drive unit) 11 for rotationally driving the rotary table 9 and gears 12 and 13 for transmitting the rotation of the rotary actuator 11 to the table 9. The gear 12 is attached so as to be fixed to the drive shaft of the rotary actuator 11, the gear 13 is fixed to the lower part of the rotary table 9, and the gear 12 and the gear 13 are engaged with each other. Accordingly, the rotation of the pneumatic rotary actuator 11 attached to the main structure 23 of the rotary machining apparatus 1 is transmitted through the gear 12 and the gear 13 to rotate the rotary table 9. At this time, the rotational speed of the rotary table 9 is set by the flow control valve 14 attached to the rotary actuator 11. FIG. 4 is a diagram of the atmospheric pressure circuit. The supplied compressed air passes through a pneumatic auxiliary device 15 equipped with an air filter, a pressure gauge, a lubricator, and the like, and rotates the rotary actuator 11 by operating the manual valve 16, whereby the rotary processing device 1 rotates. Start.

Next, a method of using the rotary machining apparatus 1 of the present embodiment incorporated in the electric discharge machining apparatus 20 (that is, a machining method by the electric discharge machining apparatus 20) will be described. A workpiece 17 that is a round bar is attached to the chuck 10 of the rotary table 9 attached to the rotary processing apparatus 1 (gripped by the chuck). By using the chuck 10 adapted to the outer diameter of the workpiece 17 that is a round bar, the workpiece 17 can be accurately attached to the rotary machining apparatus 1. In a state where the manual valve 16 is operated and the workpiece (round bar) 17 is rotated at a predetermined rotation speed, the electrode 56 of the electric discharge machining apparatus 20 is set in a discharged state to start machining. The rotation is set to an appropriate rotation speed by setting the flow control valve 14. The electrode 56 is lowered to process a fine hole in the workpiece 17. When the machining is completed, the electrode 56 is separated from the workpiece (round bar) 17 and the rotation of the rotary machining apparatus 1 is stopped by operating the manual valve 16. By such a simple procedure, a straight pore can be machined in the workpiece 17 on the central axis of the workpiece.
Further, if necessary, the rotary processing apparatus 1 may be separated from the sine bar 2, inverted 180 degrees, fixed to the sine bar 2 again, and the workpiece 17 may be processed from the back side. Since the reversing method of the rotary machining apparatus 1 has been described in the above configuration, it will be omitted. Processing from the opposite direction is the same as processing from the positive direction.

  FIG. 7 shows the machining result of the small-diameter deep hole by electric discharge machining when the rotary machining apparatus 1 according to the first embodiment of the present invention is used in comparison with the conventional machining method. FIG. 7A illustrates a measurement site and a measurement method, and FIG. 7B is a graph showing a measurement result. In this case, the electrode diameter was 1.5 mm, and the workpiece length (deep hole length) was 140 mm. Measurements are run-out from the machining center on the inlet side (black circle mark) and outlet side (white circle mark) of the hole, and inner diameter dimensions (d1, d2 respectively) on the inlet side (black circle mark) and outlet side (white circle mark) of the hole. It was done by measuring. Straightness X = {(inlet side runout) + (outlet side runout)} / 2. The straightness X is indicated by an asterisk in the graph of FIG. According to the graph of FIG. 7B, when the average straightness Xc in the conventional processing method is 100, the average straightness Xp is 28 in the method using the rotary processing apparatus of the present invention. . It can be seen that the method of the present invention improved 67% in average straightness as compared with the conventional processing method. Further, from FIG. 7B, it can be seen that the variation of the shake value is less in the machining method of the present invention than in the conventional machining method. With respect to the inner diameter of the processed deep hole, when the conventional (dc) is 100, the present invention (dp) is 98.2, which is not so different.

In the second embodiment of the present invention, since the inclination of the sine bar 2 can be adjusted using the block gauge 18, the rotation of the workpiece (round bar) 17 is stopped, and oblique pores are formed in the workpiece 17. It can be processed with an accurate inclination angle. Therefore, as shown in FIG. 1, a block gauge 18 having a predetermined thickness is installed under the round bar portion 29 of the sign bar 2. Thereby, the sine bar 2 can be inclined at an accurate angle with respect to the table 22, in other words, can be inclined at an accurate angle with respect to the electrode 56 of the electric discharge machining apparatus 20. If the workpiece 17 is machined by lowering the electrode 56 in this state, oblique pores can be machined in the workpiece 17 at an accurate inclination angle. Other configurations are the same as those in the first embodiment.
Further, the rotary table 9 can be rotated in a tilted state to process a tapered hole.

Next, effects and operations of the above embodiment will be described.
The following effects can be expected from the rotary machining apparatus according to the first embodiment of the present invention.
-When machining a small diameter deep hole in a workpiece such as a round bar by electric discharge machining, it is possible to machine a straight hole with high accuracy without causing misalignment.
・ Furthermore, the workpiece can be machined from both sides with one chuck.

The following effects can be expected from the rotary machining apparatus according to the second embodiment of the present invention.
-Diagonal small-diameter deep holes can be machined in workpieces such as round bars with an accurate tilt angle by electrical discharge machining.
・ Tapered small-diameter holes can be machined by electrical discharge machining on workpieces such as round bars.

In the present embodiment, the present invention is incorporated in an electric discharge machining apparatus and applied to electric discharge machining. However, the present invention may be applied to machining other than electric discharge machining, and the application object of the present invention is It is not limited to electric discharge machining.
Further, in the embodiment described above or shown in the accompanying drawings, a pneumatic rotary actuator is used for the rotational drive unit of the rotary machining apparatus 1, but the present invention is not limited to this, and the electric drive A known drive device such as a motor or a hydraulic motor may be used.

  The connection structure of the sine bar 2 and the main structure 23 and the mounting structure of the rotary processing apparatus 1 (or the sine bar 2) to the table 22 are limited to the preferred embodiments described above or in the attached drawings. Instead, it may be a connection or attachment structure known to those skilled in the art.

  The above-described embodiment is an example of the present invention, and the present invention is not limited by the embodiment, but is defined only by matters described in the claims, and other embodiments than the above are also possible. It can be implemented.

FIG. 1 is a schematic partial sectional view showing a schematic configuration of a first embodiment of a rotary machining apparatus according to the present invention incorporated in an electric discharge machining apparatus. FIG. 2 is a top view of the rotary processing apparatus of FIG. 1, and a sign bar and the like at the lower part of the apparatus are omitted for easy understanding. FIG. 3 is a sectional view taken along line X3-X3 in FIG. FIG. 4 is a drive air circuit diagram of the rotary machining apparatus according to the first embodiment of the present invention. FIG. 5 is a three-dimensional view for easily explaining the rotary machining apparatus according to the first embodiment of the present invention. 6 is an exploded view of FIG. FIG. 7 shows a result of machining a small-diameter deep hole by electric discharge machining using the rotary machining apparatus according to the first embodiment of the present invention, as compared with the conventional machining method, and FIG. The part and the measurement method are illustrated, and (B) is a graph showing the measurement result. FIG. 8 shows an outline of a conventional electric discharge machining apparatus 50 and a pore machining method using the same, and FIG. 8A shows a state where a small diameter deep hole is machined by electric discharge machining on a round bar workpiece. (B) shows a state in which the processing has progressed and the electrodes have been sent out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation processing apparatus 2 Sine bar 3, 3a, 3b Support | pillar 4 Support fixing member 5 Support fixing member 6 Auxiliary member 7 Fixing member 8 Fixing member 9 Rotary table 10 Chuck 11 Rotating actuator 12 Gear 13 Gear 17 Workpiece 20 Electrical discharge processing apparatus 21 Bearing 22 Table 23 Main structure 24 Support fixing member

Claims (14)

In the processing device (1), this processing device is
A gripping part (10) for gripping the workpiece (17);
A rotating part (9) to which the gripping part (10) is attached and is rotatable;
A drive unit (11) for rotating the rotating unit (9);
A main structure (23) forming the basic structure of the processing apparatus (1);
It has
The rotating device (9) is rotatably supported by the main structure (23), and the driving unit (11) is attached to the main structure (23).   The processing apparatus according to claim 1, further comprising a transmission mechanism (12, 13) for transmitting the rotation of the driving unit (11) to the rotating unit (9).   3. The processing apparatus according to claim 1, wherein the rotating part (9) is rotatably supported by the main structure (23) via a bearing (21).   The processing apparatus according to any one of claims 1 to 3, wherein the gripping part (10) is a collet chuck.   The processing apparatus according to any one of claims 1 to 4, wherein the main structure (23) is mounted on a pedestal (2).   The main structure (23) includes struts (3, 3a, 3b) installed on at least one of the upper surface and the lower surface of the main structure (23) on the periphery thereof, and the struts (3, 3a, 3b) and the The processing apparatus according to claim 5, further comprising a support fixing member (4, 5, 24) for connecting the base part (2) so as to fix the base part (2). The number of the columns (3, 3a, 3b) installed on at least one of the upper and lower surfaces of the main structure (23) is three, and the columns (3, 3a, 3b) are all cylindrical. Yes,
The three struts (3, 3a, 3b) are arranged in a substantially triangular shape,
A corresponding one of the support fixing members (5) for fixing one of the three columns is provided with a surface having a V-shaped groove, whereby the circular column (3b) has the above-mentioned surface. The V-shaped groove is in contact with the post (3b) so as to restrain its movement,
A pressing groove (27) is formed in one of the remaining struts (3), and the support fixing member (24) for fixing the remaining one strut (3) is recessed. Since it has a shape surface, the two arm portions (24a, 24b) forming the concave shape of the support fixing member (24) are fitted into the pressing groove (27) of the support column (3). 7. The fixing according to claim 6, wherein the support fixing member (24) acts to suppress and fix the main structure (23). The processing apparatus as described.   The processing device (1) can be used so as to process the back surface of the workpiece (17) by being reversed while the workpiece (17) is gripped by the grip portion (10). The processing apparatus according to any one of claims 1 to 7.   By inserting and installing a block gauge (18) or the like between the base part (2) and the mounting base (22) on which the base part (2) is installed, the base part is inclined at a predetermined angle. The processing apparatus according to claim 5, wherein the processing apparatus is used.   The machining apparatus according to any one of claims 1 to 9, wherein the machining apparatus is used by being incorporated in an electric discharge machining apparatus (20). A gripping procedure for gripping the workpiece (17);
A rotation procedure for rotating the gripped workpiece (17);
A machining procedure for machining the workpiece (17) by moving a tool toward the rotating workpiece (17);
A processing method comprising: Further comprising a reversing procedure for reversing while holding the workpiece,
12. The processing method according to claim 11, wherein after the reversing procedure is performed, the rotating procedure and the processing procedure are performed in order to process an unprocessed surface of the workpiece (17). .   It implements using the processing apparatus as described in any one of Claim 1 to 9, The processing method in any one of Claim 11 or 12 characterized by the above-mentioned.   The machining method according to any one of claims 11 to 13, wherein the machining method is used when machining a small-diameter deep hole by electric discharge machining.

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