JP6099081B2 - Electrolyte jet machining apparatus and electrolyte jet machining method - Google Patents

Description

  The present invention relates to a technique for performing electrolytic solution machining on a workpiece.

  Electrolyte jet machining is a machining method in which an electrolytic solution is ejected from a nozzle toward a workpiece (so-called workpiece), and the workpiece is electrolyzed by applying a voltage using the nozzle as a cathode and the workpiece as an anode. . Since this processing method is a chemical processing method, there is an advantage that thermal processing and mechanical processing do not have, that is, a work-affected layer, residual stress, cracks, and burrs are not generated. Further, since the machining amount is determined by the amount of electricity, there is a feature that the gap adjustment between the workpiece and the nozzle is unnecessary (see Non-Patent Document 1 and Patent Document 1 below). In electrolytic solution jet machining, adhesion processing to a workpiece can be performed by reversing the polarity.

  In the technique of Patent Document 1, an electrolytic solution jet is obtained by injecting an electrolytic solution from a small-diameter nozzle onto a workpiece. And a workpiece can be processed into a desired shape by scanning a nozzle.

  However, in the technique of Patent Document 1, since it is necessary to scan the nozzle, the processing time tends to be long.

  Further, when the work is electrolytically eluted in the technique of Patent Document 1, there is also a problem that the nozzle is easily clogged. This is because when the workpiece is electrolytically eluted, deposits are generated on the electrode on the nozzle side, and the deposits may block the flow path of the electrolytic solution.

  In the technique of Patent Document 2, the opening of the nozzle is formed in an elongated, substantially rectangular shape when viewed in cross section. Thereby, the flow of the electrolyte solution with the wide width which should be a film form or a sheet form can be obtained. According to this technique, a wide film electrolyte jet can be obtained, so that the processing time can be shortened as compared with the technique of scanning a small-diameter nozzle.

  However, it is not easy to form a nozzle having a blower outlet (that is, a nozzle opening) having an elongated shape in cross section as in Patent Document 2. That is, with this technique, there is a problem that the cost of nozzle production tends to be high.

  Moreover, in the nozzle outlet of patent document 2, although the width | variety of one direction is wide, it is normal to narrow the width | variety (namely, thickness of a jet) in the direction which cross | intersects this. For this reason, even with this technique, the problem that nozzle clogging easily occurs remains.

  Furthermore, in the technique of Patent Document 2, when the nozzle opening shape is not a straight line but a curved line, the difficulty of nozzle production increases, and the production cost increases. In addition, with this technique, it is difficult to change the shape of the nozzle once manufactured afterwards, so it is necessary to prepare a plurality of nozzles in advance according to the required nozzle opening shape.

Yoneda Koji, Kunieda Masanori: Machining Shape Simulation in Electrolyte Jet Machining, Journal of Electrical Machining Society, Vol.29, No.62 (1995), pp.1-8

JP 2006-55933 A JP 2011-110642 A

  The present invention has been made in response to the above-described problems. The first object of the present invention is to provide an electrolyte jet processing technique that can obtain a film-like electrolyte jet in a simple configuration.

  The second object of the present invention is to provide an electrolyte jet processing technique that is less likely to cause clogging of the electrolyte nozzle.

  A third object of the present invention is to provide an electrolyte jet machining technique with a high degree of freedom in machining shape.

  Means for solving the above-described problems can be described as follows.

(Item 1)
An electrolyte jet machining apparatus for electrolytically machining the workpiece by supplying an electrolyte jet to the workpiece,
It has an electrolyte nozzle, a contact surface, and a power source.
The electrolyte nozzle is configured to discharge the electrolyte toward the contact surface,
The contact surface is disposed at a position electrically insulated from the workpiece;
And at least one end of the contact surface is made to approach the workpiece,
Further, the contact surface receives the electrolytic solution discharged from the electrolytic solution nozzle, and at least flows toward the one end to form a substantially film-shaped electrolytic solution jet, It is configured to supply to the workpiece,
The power supply is configured to allow a current to flow between the electrolytic solution and the workpiece.

  The invention of this item corresponds to the first object described above. According to the invention of this item, a film-like electrolyte solution jet can be generated by bringing the electrolyte solution into contact with the contact surface. Thereby, installation of the nozzle with a wide blower outlet like the past can be omitted.

(Item 2)
Item 2. The electrolyte jet machining according to Item 1, wherein the power source is configured to cause a current to flow between the contact surface and the workpiece via the electrolyte by supplying power to the contact surface. apparatus.

  By supplying power through the abutting surface, it is possible to perform electrolytic processing on the workpiece. By appropriately selecting the polarity of the power supply, removal processing and adhesion processing on the workpiece can be performed. When removal processing is performed on a workpiece, the conventional technique has a problem that deposits are generated on the nozzle-side electrode and the nozzle is easily clogged. On the other hand, in this invention, since electric power is supplied from the contact surface, there is an advantage that the clogging of the nozzle due to the adhering matter does not occur (corresponding to the second object).

(Item 3)
The electrolytic solution jet machining apparatus according to item 1 or 2, wherein the contact surface is a curved surface.

  Since the degree of freedom of the shape of the contact surface is high, the degree of freedom of the cross-sectional shape of the film electrolyte solution jet can be increased (corresponding to the third object).

(Item 4)
The electrolytic solution jet machining apparatus according to any one of Items 1 to 3, wherein the contact surface is formed on a surface of a contact plate.

(Item 5)
The electrolytic solution jet machining apparatus according to claim 4, wherein the contact plate is supported by the support by being brought into contact with the surface of the support.

  By designing the surface shape of the support appropriately, a desired contact surface shape can be easily formed.

(Item 6)
The angle α formed by the direction of the electrolytic solution discharged from the electrolytic solution nozzle and the contact surface is 0 ≦ α ≦ 90 °. Electrolytic solution according to any one of items 1 to 5 Jet processing equipment.

  By reducing the angle α, it is possible to reduce the thickness of the electrolyte film traveling in one direction. In addition, it is expected that the cross-sectional area of the bulging portions appearing at both ends in the width direction of the electrolytic solution film can be reduced.

(Item 7)
The contact surface is formed by an inclined side surface of the cone-shaped contact body,
The electrolytic solution jet machining according to any one of items 1 to 6, wherein an axial direction of the cone-shaped contact body is substantially parallel to a discharge direction of the electrolytic solution discharged from the electrolytic solution nozzle. apparatus.

(Item 8)
The electrolytic solution jet machining apparatus according to any one of items 1 to 7, wherein a part of the contact surface is an insulator.

(Item 9)
An electrolytic solution jet processing method, wherein the electrolytic solution jet processing is performed using the electrolytic solution jet processing apparatus according to any one of items 1 to 8.

  According to the present invention, first, it is possible to provide an electrolytic solution jet processing technique capable of obtaining a film-shaped electrolytic solution jet with a simple configuration. Secondly, it is possible to provide an electrolytic solution jet processing technique in which nozzle clogging is unlikely to occur. Third, it is possible to provide an electrolyte jet machining technique with a high degree of freedom in machining shape.

It is explanatory drawing which shows the whole structure of the electrolyte solution jet processing apparatus in one Embodiment of this invention. FIG. 2 is an enlarged view of the vicinity of a contact surface in the electrolytic solution jet machining apparatus of FIG. 1 as viewed from the left direction in FIG. 1. 3 is a photograph showing a planar shape of a workpiece machined by the machining apparatus of Example 1. FIG. 10 is a schematic reference diagram showing the vicinity of an abutment surface in the machining apparatus of Modification 1; FIG. 10 is a schematic reference diagram showing the vicinity of a contact surface in a machining apparatus according to Modification 2; FIG. 10 is a schematic reference diagram showing the vicinity of an abutment surface in a machining apparatus according to Modification 3;

  Hereinafter, with reference to the attached drawings, an electrolytic solution jet machining apparatus (hereinafter sometimes abbreviated as “machining apparatus”) according to an embodiment of the present invention will be described.

(Configuration of electrolyte jet processing equipment)
As shown in FIG. 1, the processing apparatus of the present embodiment includes an electrolyte nozzle 1, a contact plate 2, and a power source 3. Further, this processing apparatus includes a support 4, a compressor 5, a pressure tank 6, a table 7, a machining tank 8, a pipe 9, and a regulator 10.

  The electrolyte nozzle 1 is configured to discharge the electrolyte 100 sent from the pressure tank 6 through the pipe 9 toward the workpiece W (see FIGS. 1 and 2). Since the same electrolyte solution as that used in conventional electrolyte solution jetting can be used, detailed description thereof will be omitted. In this embodiment, the angle α formed by the direction of the electrolyte discharged from the electrolyte nozzle 1 and the contact surface (described later) of the contact plate 2 is appropriately selected from the range of 0 ≦ α ≦ 90 °. Has been.

  A contact surface 21 is formed on the surface of the contact plate 2. The contact plate 2 is supported by the support body 4 by contacting the surface of the support body 4. More specifically, the outer peripheral surface of the support body 4 is a cylindrical surface, and the contact plate 2 is supported by the cylindrical surface, and thus has a shape curved in a circular arc shape. Thereby, in this embodiment, the contact surface 21 is a cylindrical surface curved in a circular arc shape in cross section.

  The contact surface 21 is disposed at a position slightly spaced upward from the workpiece W (see FIGS. 1 and 2). Furthermore, as is clear from these drawings, the lower end (that is, one end) 22 of the contact surface 21 is brought close to the workpiece W.

  Further, the contact surface 21 receives the electrolytic solution 100 discharged from the electrolyte nozzle 1 and causes it to flow out toward at least one end 22 of the contact surface 21 (in this example, the lower end in the figure). Thereby, the contact surface 21 of the present embodiment is configured to form a substantially film-like electrolytic solution jet 11 and to supply the workpiece W to the workpiece W. Here, the electrolytic solution jet 11 is formed by the electrolytic solution 100. In this specification, the electrolytic solution formed into a film-like jet by the action of the contact surface 21 is referred to as an electrolytic solution jet 11, and By distinguishing the previous stage electrolyte solution as electrolyte solution 100, the two are distinguished.

  The power source 3 is configured to allow a current to flow between the electrolyte jet 11 and the workpiece W. More specifically, one end of the wiring 31 is electrically connected to the negative electrode of the power source 3, and one end of the wiring 32 is electrically connected to the positive electrode of the power source 3. The other end of the wiring 31 is electrically connected to the contact surface 21, and the other end of the wiring 32 is electrically connected to the workpiece W.

  In the present embodiment, a direct current constant current source or a constant voltage source can be used as the power source 3. Further, the example in which the workpiece side is the positive electrode is for removing the workpiece, and the workpiece side can be attached to the workpiece by using the negative electrode. Further, for example, an AC power source may be used as the power source 3 for the purpose of electrolytic polishing. Further, the power supply 3 may have a configuration in which the supply of current can be freely turned on and off using a switching circuit in order to obtain various processing patterns.

  As described above, the support 4 is formed in a columnar shape in the present embodiment, and its outer peripheral surface is a cylindrical surface. Further, the support 4 can be rotated in the forward and reverse directions around the rotation shaft 41. Thereby, in this embodiment, the support body 4 can be inclined at a desired angle. In FIG. 1, the inclination angle from the normal direction with respect to the processed surface of the workpiece W (which is a horizontal plane in this example) is represented by the symbol θ.

  The compressor 5 is configured to supply compressed gas (usually air) to the pressure tank 6 via the regulator 10 and the pipe 51.

  The pressure tank 6 stores the electrolytic solution 100 and supplies the electrolytic solution 100 pressurized by the compressed gas to the electrolytic solution nozzle 1.

  The table 7 mounts the workpiece W on the upper surface. In this example, the machining surface of the workpiece W is arranged along the horizontal direction, but it is possible to arrange the workpiece W by inclining it in an appropriate direction according to the machining purpose.

  The machining tank 8 is configured to accommodate the electrolytic solution 100 discharged from the electrolytic solution nozzle 1 toward the contact surface 21 (that is, the workpiece W). The machining tank 8 is provided with a drain part 81 for sending out the discharged electrolyte 100 to the outside.

(Operation of this embodiment)
Hereinafter, the operation of this embodiment will be described.

  In the present embodiment, the electrolytic solution 100 is continuously ejected from the electrolytic solution nozzle 1 toward the contact surface 21 using the pressure of the gas in the pressure tank 6. The injected electrolyte 100 collides with the contact surface 21 and spreads in a thin film shape along the shape of the contact surface 21. Furthermore, the electrolytic solution 100 flows out from the one end (the lower end in this example) of the contact surface 21 toward the workpiece W vigorously by the action of kinetic energy and gravity given to itself. In this example, a film-like electrolyte jet 11 can be generated by the electrolyte 100 flowing out in this way. The generated electrolyte jet 11 continuously collides with the surface of the workpiece W. The electrolyte that collides with the surface of the workpiece W spreads thinly outward from the collision portion on this surface, and then rises high. Such a diffusion and uplift phenomenon is called a “water jump phenomenon”. In the present specification, a highly raised portion is referred to as a jumping portion. By utilizing the region of the diffusion portion inside the jumping portion and close to the collision point, the current density can be concentrated on the processing portion, and the processing efficiency can be improved. Since the water jump phenomenon has been conventionally known, a detailed description thereof will be omitted.

  On the other hand, a voltage is applied between the contact surface 21 and the workpiece W via the electrolyte jet 11 by the power source 3. As described above, when the workpiece W is removed, the polarity of the voltage is negative on the contact surface 21 side and positive on the workpiece W side, and the electrodeposit is attached to the surface of the workpiece W. In this case, the contact surface 21 side is positive, and the workpiece W side is negative. The processing in the present embodiment is used as a concept including both “removal of the workpiece by electrolysis” and “adhesion of the electrodeposit on the workpiece”.

  In the apparatus of the present embodiment, machining (for example, grooving) to the region P of the workpiece W can be performed as described above. Here, in the apparatus of this embodiment, since the film-like electrolyte solution jet can be generated by using the contact surface 21, the workpiece W is compared with the case of scanning a thin jet having a circular cross section. There is an advantage that the processing time can be shortened. However, this advantage is based on the premise that the current supplied from the power source 3 increases in proportion to the cross-sectional area of the electrolyte jet. That is, if the total current is increased so that the current density on the region P is maintained within a proper range, the progress of the groove processing is constant regardless of the size of the cross-sectional area. Such control can be realized by performing constant current machining in which the total set current is increased in proportion to the cross-sectional area. Alternatively, if the gap (distance) between the one end 22 of the contact plate and the workpiece W is constant, the current automatically increases in proportion to the cross-sectional area by performing processing using a constant voltage power source. .

  Moreover, in the apparatus of this embodiment, since the contact surface 21 is a curved surface, the cross-sectional shape of the film electrolyte solution jet can be curved. For this reason, in this embodiment, the process along this curved shape can be performed. Here, although it is difficult to form the nozzle opening shape in a curved shape, the present embodiment has an advantage that an electrolytic solution jet having a curved cross section can be generated with the simple configuration as described above. . The contact surface 21 has a circular arc shape (that is, a cylindrical surface shape) in the above-described embodiment. It can be.

  Furthermore, in this embodiment, since the freedom degree of the shape of the contact surface 21 is high, it is easy to change the cross-sectional shape of the electrolyte jet. In addition, in the present embodiment, the contact plate 2 is arranged along the surface of the support 4, and thereby the shape of the contact surface 21 can be set, so that necessary deformation such as a change in the radius of curvature of the electrolyte jet can be achieved. There is also an advantage of being able to respond quickly and easily.

  Further, when the workpiece is removed in the conventional electrolytic processing apparatus, there is a problem that the nozzle is likely to be clogged with deposits. On the other hand, in this embodiment, since power is supplied to the contact surface 21 arranged on the downstream side of the electrolyte nozzle 1, there is an advantage that the problem of nozzle clogging does not occur in principle. In this embodiment, deposits are generated on the contact surface 21, but the contact surface 21 has a large area, and the deposits often drop together with the electrolytic solution. The frequency of replacement or polishing can be kept low.

  In this embodiment, since the power is supplied to the contact surface 21 on the downstream side of the electrolyte nozzle 1, the voltage drop caused by the electrolyte (including the state of the jet) is lower than when the electrolyte nozzle 1 is supplied with power. It can be kept low. That is, when the electrode is arranged on the electrolyte solution nozzle 1 or on the upstream side thereof, the flow path of the electrolyte solution to the workpiece W becomes longer, and the voltage drop is increased correspondingly. Therefore, it is necessary to increase the power supply voltage. Arise. On the other hand, in this embodiment, since the power feeding location (specifically, the lower end of the contact surface 21) to the electrolyte jet 11 is close to the workpiece W, the voltage drop therebetween can be suppressed low. There is an advantage that the power supply voltage can be reduced.

  Furthermore, in this embodiment, since the support body 4 can be rotated around the rotation shaft 41, the inclination angle of the electrolyte jet 11 with respect to the workpiece W can be easily changed. Here, when the electrolyte jet 11 is tilted with respect to the surface of the workpiece W, there is an advantage that a machining end face, a machining groove or a machining hole extended in the tilting direction can be easily formed.

  Further, in the present embodiment, the contact plate 2 curved in a cylindrical shape can be arranged so that the axial direction thereof is inclined with respect to the surface of the workpiece W. Then, the distance between both ends in the width direction at the lower end of the contact plate 2 and the surface of the workpiece W can be increased. If the lower end of the contact plate 2 is parallel to the workpiece W, the contact portion 2 may be electrically connected to the jumping portion generated by the jumping phenomenon of the electrolyte jet sprayed on the surface of the workpiece W. is there. In that case, the current density to the machining portion is reduced, and the machining efficiency of the workpiece W is deteriorated. On the other hand, in this embodiment, the probability that such a problem will occur can be kept low.

  Furthermore, in the present embodiment, the angle α formed between the direction of the electrolytic solution 100 discharged from the electrolytic solution nozzle 1 and the contact surface 21 is changed in the range of 0 ≦ α ≦ 90 °, thereby allowing the electrolytic solution jet to be changed. It is possible to control the film thickness and width. Moreover, it becomes possible to reduce the area of the round part (bulging part) in the width direction both ends of the electrolyte solution jet obtained by such a change of the angle α. This rounded portion will be described later.

Example 1
Using the apparatus of the above-described embodiment, electrolytic processing was performed under the conditions shown in Table 1 below.

  Here, the “running distance” is a distance from the position where the electrolyte sprayed from the electrolyte nozzle 1 collides with the contact surface 21 to the lower end 22 of the contact surface 21 (that is, the position where the electrolyte jet flows out). . In Table 1, “nozzle inclination” means the angle α. The conditions in Table 1 are merely examples, and various changes can be made according to the processing purpose.

  The result is shown in FIG. At this time, the radius of curvature of the contact surface was 17.5 mm, and the pressure in the pressure tank was 0.3 MPa. The groove width at this time was about 0.3 mm at the center and about 0.4 mm at the right end.

As is clear from the photograph shown in FIG. 3, according to the present embodiment, a curved narrow groove or hole can be formed . Here, rounded portions (bulged portions) are formed at both ends of the groove formed by processing. This is presumed to be due to the generated electrolyte jet being rounded by its own surface tension. If this rounded portion is inconvenient, the workpiece W may be appropriately masked.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above-described embodiment, the convex surface of the curved contact plate is used as the contact surface, but the concave surface on the back side can be used as the contact surface. In addition, both of the inclination angles θ and α described above can be changed as appropriate.

  Furthermore, in the said embodiment, although the contact surface 21 and the workpiece W are spaced apart, as long as there is no trouble in a process, both are contacted on both sides of an insulator (for example, masking material which covers the circumference | surroundings of a process part). It is possible. In short, the contact surface 21 and the workpiece W may be in a state where they are electrically insulated in a state where the electrolyte jet is not flowing.

  Below, the modification of above-described embodiment is shown. Note that these modifications are also included in the scope of the present invention.

(Modification 1)
An example in which the tilt angle α is 0 ° is shown in FIG. In this example, the direction of the electrolytic solution 100 blown from the electrolytic solution nozzle 1 (more specifically, the axial direction of the electrolytic solution nozzle 1) and the extending direction of the contact surface 21 are parallel. Also in this example, since the electrolyte solution diffuses on the contact surface 21 due to its own weight or wettability with the contact surface 21, it is possible to form a film-like electrolyte solution jet. In addition, although the contact surface 21 in FIG. 4 is a flat surface, it can be a curved surface or other arbitrary shapes.

(Modification 2)
FIG. 5 shows an example in which a conical contact body 200 is used in place of the contact plate 2 described above. In this example, the contact surface 21 is formed by an inclined side surface (conical surface) in the contact body 200. The axial direction of the conical contact body 200 is substantially parallel to the discharge direction of the electrolyte solution 100 discharged from the electrolyte nozzle 1.

  In this example, the surface of the workpiece W is covered with a mask 300. Further, the workpiece W has a through-hole 400 for dropping the electrolyte collected toward the center on the workpiece surface inside the conical surface after the conical electrolyte jet collides with the workpiece W. Is formed.

  According to this configuration, since the cross section of the electrolyte jet is annular and has no cuts, there is an advantage that a processed groove without the rounded portion (bulged portion) can be formed. Further, when it is desired to process an arc-shaped groove in which a ring is cut halfway, a mask 300 may be used. Further, in this example, since the through hole 400 for dropping the electrolyte solution toward the center is formed, the inconvenience that the water jumping portion formed by the electrolyte solution toward the center contacts the contact body 200 can be avoided. In FIG. 5, the region P to be processed and the mask 300 are hatched.

  Further, the contact body 200 is supported by the support tool 201.

  In this modification, the contact body has a conical shape, but it may be a pyramid shape.

  Since the configuration and advantages other than those described above are the same as those of the above-described embodiment, detailed description will be omitted by assigning the same reference numerals.

(Modification 3)
FIG. 6 shows an example in which a part of the contact surface 21 (shaded portion in FIG. 6) is an insulator 210 in the above-described modification 2. In this example, the arrangement of the mask is omitted. According to the third modification, since the processing position of the workpiece W can be determined according to the shape of the insulator 210, a groove can be formed in a desired range even if the mask arrangement is omitted.

  Since the configuration and advantages other than those described above are the same as those of the above-described modification 2, detailed description will be omitted by assigning the same reference numerals.

DESCRIPTION OF SYMBOLS 1 Electrolyte nozzle 2 Contact plate 3 Power supply 4 Support body 5 Compressor 6 Pressure tank 7 Table 8 Machining tank 9 Piping 10 Regulator 11 Electrolyte jet 21 Contact surface 22 One end of contact surface 31 Wiring 32 Wiring 41 Rotating shaft 51 Piping 81 Drain part 100 Electrolyte 200 Contact body 201 Support tool 210 Insulator 300 Mask 400 Through hole W Workpiece θ Inclination angle of support body with respect to normal to work surface α Inclination of electrolyte nozzle with respect to contact surface Corner P Area to be machined

Claims (9)

An electrolyte jet machining apparatus for electrolytically machining the workpiece by supplying an electrolyte jet to the workpiece,
It has an electrolyte nozzle, a contact surface, and a power source.
The electrolyte nozzle is configured to discharge the electrolyte toward the contact surface,
The contact surface is disposed at a position electrically insulated from the workpiece;
And at least one end of the contact surface is made to approach the workpiece,
Further, the direction the abutment surface, receiving the electrolyte solution discharged from the electrolytic solution nozzle, and by flowing out toward the free space definitive in the direction of at least one end, which intersects with the surface of the workpiece A substantially film-like electrolyte jet proceeding to , is formed in the free space and is supplied to the workpiece,
The power source is configured to allow a current to flow between the electrolyte jet and the workpiece ,
The flow rate of the electrolytic solution traveling in the direction intersecting the surface of the workpiece is set to a speed at which the electrolytic solution that has collided with the surface of the workpiece can form a jumping portion outside the collision portion. Electrolytic solution jet processing device characterized. The electrolyte jet according to claim 1, wherein the power source is configured to cause a current to flow between the contact surface and the workpiece via the electrolyte by supplying power to the contact surface. Processing equipment. The electrolytic solution jet machining apparatus according to claim 1, wherein the contact surface is a curved surface , and both ends in the width direction at the lower end of the contact surface are separated from the workpiece. . The electrolytic solution jet machining apparatus according to claim 1, wherein the contact surface is formed on a surface of a contact plate. The abutment plate is supported by the support by being brought into contact with the surface of the support, and the inclination angle of the support can be changed, whereby the surface of the workpiece can be changed. The electrolytic solution jet machining apparatus according to claim 4, wherein a collision angle of the electrolytic solution jet is also changeable . The electrolysis according to any one of claims 1 to 5, wherein an angle α formed by a direction of the electrolytic solution discharged from the electrolytic solution nozzle and the contact surface is 0 ≦ α ≦ 90 °. Liquid jet processing equipment. The contact surface is formed by an inclined side surface of the cone-shaped contact body,
The electrolyte solution jet according to claim 1, wherein an axial direction of the cone-shaped contact body is substantially parallel to a discharge direction of the electrolyte solution discharged from the electrolyte solution nozzle. Processing equipment. The electrolytic solution jet machining apparatus according to claim 1, wherein a part of the contact surface is an insulator.   An electrolytic solution jet processing method, wherein the electrolytic solution jet processing is performed using the electrolytic solution jet processing apparatus according to claim 1.