JP2006055933A - Electrolytic solution jet machining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrolytic solution jet machining method for machining a conductive hard-to-cut material into a fine and arbitrary machining shape with high accuracy to have excellent finished surface quality and finished surface roughness. <P>SOLUTION: A jet nozzle 1 is connected to a cathode of a constant current power source 2 and a workpiece is connected to an anode. A relative movement locus is set so that a plurality of machining grooves according to the same machining condition or different machining conditions based on a superposition principle to obtain a contour shape of a desired machining shape by taking a machining depth of the desired machining shape as a mark. The object machining is carried out for the workpiece 3 by scanning the jet nozzle 1 along the set relative movement locus. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrolytic solution jet processing method for performing fine hole processing and groove processing. In particular, the present invention relates to an electrolytic solution jet processing method for processing an arbitrary processed shape.

  Electrolyte jet machining that ejects a linear electrolyte jet toward a workpiece and applies a predetermined voltage between the nozzle and the workpiece to selectively process just under the electrolyte jet. The method is known. Electrolytic machining enables machining of electrically difficult-to-cut materials, and does not cause alteration layers, burrs, cracks, or the like on the machining surface as in electric discharge machining, and does not cause deformation due to residual stress. Also, the finished surface quality and finished surface roughness are good.

  The electrolytic solution jet processing method is one of electrolytic processing methods that have been well known for a long time, as disclosed in, for example, Patent Document 1, but a precise and fine hole or groove shape is electrolytic processed. It is difficult to do so, and seems to have been used exclusively for finishing, polishing, cutting, drilling and the like of locally processed surfaces. Recently, for example, Patent Document 2 discloses a cutting method using an electrolyte jet. As shown in Non-Patent Document 1, Non-Patent Document 2, and Non-Patent Document 3, the present inventors have also conducted basic research on processing characteristics of an electrolytic solution jet processing method, and have announced them sequentially.

Japanese Utility Model Publication No. 50-156523 JP 2001-62632 A (pages 4 to 6) Yoneda Koji, Kunieda Masanori, "Processing Shape Simulation in Electrolyte Jet Machining", Journal of Electrical Machining Society, 1996, Vol. 29, No. 63, p. 1-8 Natsuhisa, Masanori Kunieda, “Processing Characteristics of Micro Electrolyte Jet Processing”, Proceedings of the 2004 JSPE Spring Conference, p. 919-920 Satoshi Mori, Masanori Kunieda, “Coloring of titanium surface by electrolytic solution jet processing”, Proceedings of National Conference on Electrical Processing Society, 1997, p. 21-22

  Since a nozzle having a very small inner diameter has been provided, and positioning control of a moving body can be performed more precisely, higher-precision processing can be performed with an electrolyte jet. Therefore, it is expected that minute and precise molds and parts are processed with high accuracy by an electrolytic solution jet having excellent finished surface quality and finished surface roughness. However, it is not easy to process an arbitrary fine processed shape with an electrolytic solution jet with a desired processing accuracy, particularly with high accuracy on the order of several hundred μm to several tens μm.

  An object of the present invention is to provide an electrolytic solution machining method capable of performing processing of a fine arbitrary machining shape on a conductive difficult-to-cut material with higher accuracy and excellent in finished surface quality and finished surface roughness. And

  In the electrolytic solution jet machining method of the present invention, an electrolytic solution jet nozzle is connected to a cathode of a machining power source, a workpiece is connected to an anode of the machining power source, and a linear electrolyte jet is ejected from the nozzle to the workpiece. In the electrolytic solution machining method in which the nozzle is moved relative to the workpiece to perform electrolytic machining on the workpiece, a desired contour shape and machining depth can be obtained based on the principle of superposition. The relative movement trajectory of the nozzle is set by superimposing the processing grooves according to the processing conditions set in the above, and the nozzle is scanned along the relative movement trajectory to process a desired processing shape.

  In the electrolytic solution jet processing method, preferably, the desired processing depth is obtained by operating a current supplied from the processing power source.

  Further, another electrolytic solution jet machining method of the present invention comprises an electrolytic solution jet nozzle connected to a cathode of a machining power source, a workpiece connected to an anode of the machining power source, and a linear electrolytic solution jet from the nozzle. In an electrolytic solution jet machining method for performing electrolytic machining on a workpiece by moving the nozzle relative to the workpiece while spraying the workpiece, the hole cross-sectional shape of the nozzle is changed to an edge or a corner of a desired machining shape. The nozzle is moved as close to the machining surface as possible, and the pressure of the electrolyte supplied is set to a high pressure, and the desired machining shape is machined so as to transfer the hole cross-sectional shape. .

  In the electrolytic solution jet processing method, a desired processing depth is obtained by controlling a moving speed of the nozzle and operating a processing time.

  In addition, the electrolytic solution jet processing method of the present invention preferably uses an aqueous sodium nitrate solution that forms a passivated coating as the electrolytic solution of the electrolytic jet while forming the passivated coating on the surface of the workpiece. The desired processing shape is processed. Also preferably, an electrolyte jet mixed with abrasive grains is used.

  The electrolytic solution jet processing method of the present invention can process a processing groove having a groove width and a groove depth according to the set processing conditions. Based on the superposition principle, the electrolyte jet nozzle is scanned so that the processing grooves are overlapped, and processing is performed so as to obtain a desired contour shape and processing depth, so that the processing groove accuracy according to the set processing conditions is improved. Therefore, it is possible to perform processing as planned depending on the situation, and it is possible to process a fine arbitrary processing shape with higher accuracy. As a result, there is an excellent effect that it is possible to perform fine precision molds and parts processing that require high processing surface quality and high processing surface roughness with higher accuracy.

  If the desired machining depth is obtained by changing the current value supplied from the machining power supply, the controllability is superior to operating other parameters that can adjust the machining depth such as machining time. Thus, it is possible to more easily perform highly accurate shape processing.

  Further, according to another electrolytic solution jet processing method of the present invention, the hole cross-sectional shape of the nozzle is made to be a shape corresponding to an edge or a corner of the contour shape, and the nozzle is moved as close to the processing surface as possible to narrow the gap and the electrolyte jet Therefore, the nozzle hole cross-sectional shape is accurately transferred with less error, and the edges and corners of the desired contour shape can be sharply formed. As a result, there is an excellent effect that it is possible to more easily perform fine precision molds and parts processing that require a processed surface quality and a processed surface roughness.

  In the above-described electrolyte jet machining method, when the desired machining depth is obtained by manipulating the machining time without changing the current to be supplied, the parameters that hardly affect the contour shape are manipulated. Since the machining is performed according to the optimum current value to always obtain the scheduled machining accuracy, the machining groove can be formed at the desired groove depth according to the planned contour shape accuracy, and any desired machining can be performed more accurately. The shape can be processed.

  A sodium nitrate aqueous solution tends to form a passivated film on the surface of the workpiece. The electrolytic solution that forms the passivating film has an effect of hindering electrolysis in a low current density region, and the removal amount decreases rapidly as the distance from the axial center of the linear electrolytic solution jet increases. Therefore, in the electrolytic solution machining method of the present invention, by using a sodium nitrate aqueous solution that easily forms a passivated film as the electrolytic solution of the electrolytic solution jet, the base portion in the cross-sectional shape of the single processed groove is narrowed. Thus, a more accurate groove width can be obtained. As a result, there is an excellent effect that the electrolytic solution jet processing can be performed with higher accuracy.

  When the abrasive grains are mixed in the electrolytic solution and processing is performed using the electrolytic solution jet in which the abrasive grains are mixed, the finished surface roughness is improved by the polishing action of the abrasive grains. In particular, when processing with an electrolyte jet that forms a passivated coating, the abrasive removes the passivated coating only underneath the electrolyte jet to promote electrolytic action and improve machining shape accuracy. Play.

  FIG. 1 shows a schematic configuration of an apparatus for carrying out the electrolytic solution jet processing method of the present invention. In the electrolyte jet machining apparatus of FIG. 1, the electrolyte jet nozzle 1 is connected to the cathode of a constant current power supply device 2 that is a machining power source, and the workpiece 3 is connected to the anode of the constant current power supply device 2. A clean electrolyte is stored in the pressure tank 4, and the electrolyte in the pressure tank 4 is supplied to the jet nozzle 1 by the compressed air from the air compressor 6 whose pressure is adjusted by the air regulator 5, and a straight line having a predetermined hydraulic pressure. A liquid electrolyte jet is jetted substantially perpendicular to the machining surface of the workpiece 3.

  The jet nozzle 1 moves in two horizontal axes by an X-axis moving body and a Y-moving body mounted on a column (not shown). The workpiece 3 is mounted on a machining table 8 that is moved up and down by a Z-axis moving body 7. A splash guard 9 is installed around the processing table 8, and the electrolytic solution ejected from the jet nozzle 1 is collected in a liquid tank 10 provided below the processing table 8. A control device (not shown) controls the positioning of the moving bodies at the same time and controls the scanning speed of the jet nozzle 1. Further, the control device controls at least the direct current supplied from the constant current power source 2 to a set current value and adjusts the air regulator 5 to control the fluid pressure of the electrolyte jet.

  The jet nozzle 1 is moved relative to the workpiece 3 while jetting a linear electrolyte jet from the jet nozzle 1 onto the workpiece 3 according to a predetermined relative movement locus and processing conditions set in the control device. Electrolytic machining is performed on the workpiece 3. At this time, a processing groove having a groove width and a groove depth according to the processing conditions is formed by scanning the jet nozzle 1. If the processing conditions are made constant and the relative movement speed of scanning the jet nozzle 1 is made constant, a processing groove having the same groove width and the same processing depth can be obtained. The processing conditions corresponding to the type of the jet nozzle 1 and the material of the workpiece 3 include electrical conditions such as applied voltage and parameters such as electrolyte concentration.

  At this time, a constant current power supply device 2 is used as a processing power source for the jet nozzle 1, and the voltage is controlled in accordance with the gap between the jet nozzle 1 and the workpiece 3 so as to keep the current constant. Since a floating electrolyte current is supplied and no floating current flows except directly under the jet nozzle 1, the machining shape accuracy is not affected regardless of the gap change. On the other hand, in an electrolytic processing method in which a tool electrode and a workpiece are immersed in an electrolytic solution, a floating current flows in a portion other than directly below the tool electrode, so that a processing depth and a processing groove width change due to a gap variation. Therefore, the electrolytic solution jet machining method according to the embodiment does not need to maintain a constant gap, and has an advantage that shape processing with high accuracy can be performed more easily.

  In principle, any machining shape can be machined by scanning the jet nozzle 1 along a relative movement trajectory with the width of the electrolyte column of the electrolyte jet sprayed from the jet nozzle 1 as an interval. However, since the electrolytic solution jet processing uses a liquid as a processing medium, it is difficult to make the cross-sectional shape of each processing groove completely rectangular, and it is difficult to obtain a desired processing depth. When the desired processing shape is a complicated shape, it is not easy to set the relative movement locus itself. For this reason, a desired machining shape having an arbitrary contour shape and machining depth cannot be easily machined with satisfactory machining shape accuracy by simply arranging the machining grooves of the electrolyte column width of the electrolyte jet. There are many cases.

  As a result of research, it was found that the principle of superposition is effective in electrolyte jet machining. Therefore, in the embodiment, the relative movement locus is set by superimposing the machining grooves according to the machining conditions set so as to obtain a desired contour shape and machining depth based on the principle of superposition. Then, the jet nozzle 1 is scanned relative to the workpiece 3 to process a desired processing shape. According to the superposition principle, the groove width and groove depth of another machining groove formed so that the groove width and groove depth of a machining groove according to a set machining condition overlap with the machining groove are exactly the same. Larger machining grooves are formed so as to overlap and be added.

2 to 4 show experimental examples. The jet nozzle has an inner diameter of 0.4 mm, the workpiece material is phosphor bronze, and the electrolyte is a 20 wt% sodium nitrate aqueous solution. The width is 0.7 mm, the length is 7.0 mm, and the deepest depth is 0, as shown in FIG. A plurality of .03 mm processed grooves were processed to overlap each other under the same processing conditions shown in Table 1. Specifically, the second machining groove is machined so as to be parallel to the position shifted in the X-axis direction by 0.2 mm from the first machining groove, and the third machining groove is successively 0.1 mm, 4 mm from the second machining groove. A rectangular hole having a width of 1.2 mm, a height of 7.0 mm, and a depth of 0.08 mm is formed by shifting the first processing groove by 0.2 mm from the third. At this time, the cross-sectional shape of a single processed groove actually processed according to the processing conditions in Table 1 was measured, and the relative movement trajectory of the jet nozzle was set based on the cross-sectional shape predicted by simulation. Based on the data of the measurement result of a single machining groove as shown in FIG. 3, based on a simple superposition principle, the cross-sectional shape finally obtained with four machining grooves is simulated and predicted. When the shapes after machining were compared, as shown in FIG. 4, it was confirmed that there was almost no error between the width of the machining shape and the deepest machining depth.

  Accordingly, the relative movement trajectory of the jet nozzle 1 is set based on the principle of superposition by calculating backward from the desired machining shape, specifically, the desired contour shape and the deepest machining depth. If the contour shape is a square, linear, or circular processing hole, the processing grooves may be overlapped from the outer side under the same processing conditions. When the contour shape is a free curve, the machining conditions are changed to form partially different machining grooves and overlap, and the relative movement trajectory is set so that the desired machining shape is finally obtained.

  In order to obtain an arbitrary machining shape, machining grooves are overlapped and machined based on the principle of superposition, so that the machining shape accuracy of the desired machining shape substantially matches the machining shape accuracy of each machining groove. From this, the shape and processing conditions of the jet nozzle to be used can be basically considered as those that affect the processing accuracy of the desired processing shape. Therefore, the jet nozzle and the processing conditions will be described more specifically below.

  Considering only the processing shape accuracy, if the hole shape of the jet nozzle is accurately transferred, it can be said that the inner diameter of the jet nozzle is reflected in the accuracy of the contour shape of the edge and the corner. The smaller the better. The processing expected in the electrolytic solution jet processing is a region in which the size of the processing shape is small and excellent finish surface quality and finish surface roughness are required, and includes a minute region having a processing shape of several mm or less. Therefore, the inner diameter of the jet nozzle is required to be 1 mm or less. In view of the inner diameters of jet nozzles currently available, the inner diameter of the jet nozzle used in the embodiment is suitably 0.015 mm to 1 mm. Moreover, in order to ensure the accuracy of the processing groove width obtained with respect to a hole diameter, it is preferable that a jet nozzle is a shape which can form a linear electrolyte solution column.

As a result of experiments, the following has been found out about the relationship between the processing conditions and the transfer accuracy of the hole cross-sectional shape of the jet nozzle (hereinafter simply referred to as transfer accuracy).
(1) The gap should be as narrow as possible.
(2) The smaller the current value, the better the transfer accuracy.
(3) The hydraulic pressure of the electrolyte jet is preferably as high as possible.

  FIG. 5 is a photograph of a pit processed by changing the gap, the electrolyte pressure, and the current value as shown in FIGS. 7 to 10 using the jet nozzle having a linear shape and a semicircular cross section shown in FIG. . The material of the workpiece is phosphor bronze, and the electrolyte is a 20% by weight sodium nitrate aqueous solution. As shown in FIG. 7, as the gap becomes smaller under the same processing conditions, the influence of jet spread is reduced, and a shape closer to the shape of the nozzle can be obtained. As shown in FIG. 8, when the pressure in the pressure tank is increased under the same processing conditions, the processing accuracy is hardly affected, but the transfer accuracy is improved. As shown in FIGS. 9 and 10, when the current value is changed, the processing depth becomes deeper. On the other hand, when the processing time is lengthened, the processing depth of the pits becomes deep, but it can be seen that the influence on the transfer accuracy is smaller than when the current value is changed.

  The transfer accuracy of pits is related to the processing shape accuracy when processing an arbitrary processing shape. Therefore, in order to obtain the shape of the edge and the minute corner more accurately, the jet nozzle is brought as close to the processing surface as possible, the gap is narrowed, and the pressure of the supplied electrolyte jet is increased. In particular, when processing pits of a desired shape as the shape of the jet nozzle is transferred, or when processing edges or small corners with the jet nozzle hole cross-sectional shape corresponding to the desired hole shape or edge or minute corner Then, it is preferable to obtain the machining depth by changing and controlling the machining time by controlling the relative movement speed of the jet nozzle without changing the current value supplied from the constant current power supply device. For example, the direction of the jet nozzle is rotated around its axis so that the hole cross-sectional shape of the jet nozzle is transferred at the edge portion of the desired contour shape, and the desired processing shape is processed, and the processing time is adjusted to adjust the processing depth. Align.

  In processing for obtaining a processing groove having a desired contour shape by moving the jet nozzle at a constant relative moving speed, it is effective to operate the current so as to align the processing depth. Since the current is superior in controllability compared to other parameters that affect the processing depth such as processing time, it is easier to process the current more easily and accurately. Therefore, there is an advantage that a desired processing depth can be obtained more easily and with high accuracy. Therefore, when emphasis is placed on simplicity rather than precision, the machining value is adjusted by controlling the current value, and when emphasis is placed on precision rather than simplicity, the machining depth may be adjusted by controlling the machining time.

  In this way, it is better to use a jet nozzle with a small inner diameter to form a finer processing groove and overlap them. However, if the inner diameter of the jet nozzle is small, the processing amount per unit time is small. It is natural to become. Therefore, finally, it is preferable to set the relative movement trajectory in consideration of the groove width and groove depth of the minute processed groove in a balance between required processing shape accuracy and processing time. For example, a jet nozzle having a relatively large inner diameter may be used for a large part, but a jet nozzle having a relatively small inner diameter is used for a small precision part. Further, when processing a small part of 1 mm or less, if it is within the allowable range of processing accuracy, a pit may be formed so as to transfer the hole shape of the jet nozzle as it is.

  In the embodiment, the relative movement trajectory is set based on the principle of superposition, so that by changing the jet nozzle or changing and adjusting the processing conditions, different processing grooves can be overlapped to form a desired processing shape. Can get. For example, it is possible to obtain a desired machining shape by exchanging jet nozzles or changing and adjusting machining conditions and dividing into a plurality of machining steps. In addition, the jet nozzle can be exchanged at the edge or corner so as to be processed separately from the straight portion. Alternatively, it is possible to perform a process of partially overlapping the processing grooves after performing an appropriate electrolytic process with a jet nozzle having a partially large inner diameter. For machining shapes in which the machining depth changes stepwise, the machining conditions are changed and controlled to change the machining depth, and the relative movement trajectory of the overlay is set to match the change. Further, by processing the current value gradually smaller, the shape of the end of the processed groove can be reduced so as to have a tail.

  Here, in the embodiment, an aqueous solution of sodium nitrate is used as an electrolytic solution of the electrolytic solution jet, and a desired processed shape is processed while forming a passivated film on the surface of the workpiece. A sodium nitrate aqueous solution is more likely to form a passivated film on the surface of the workpiece than an electrolytic solution such as a sodium chloride aqueous solution. The passivating film has an action of hindering electrolysis when the current density is low. Therefore, in general, when the workpiece and the electrolytic electrode are immersed in the electrolytic solution and electrolytic processing is performed at a low current density, the processing is hindered by the passivating film, which is disadvantageous.

  However, due to the difference in the current density of the electrolyte column of the electrolyte jet, it is noted that the removal amount decreases rapidly as the passivated film moves away from the axis center of the electrolyte column of the electrolyte jet. When processing fine shapes by machining, an electrolyte that forms a passivated film, such as an aqueous sodium nitrate solution, is used to form the passivated film on the surface of the work piece while processing the desired processed shape. By doing so, the processing groove can be formed with high accuracy, and as a result, the shape processing can be performed more accurately. In particular, when a sodium nitrate aqueous solution is used, a result that the processing shape accuracy is remarkably improved with an iron-based workpiece has been obtained.

In FIG. 11, the comparison result of the cross-sectional shape of a processing groove when using sodium nitrate aqueous solution and sodium chloride aqueous solution is shown. The experimental conditions at this time are as shown in Table 2. From FIG. 11, it can be seen that when the sodium nitrate aqueous solution is used, the base of the processing groove becomes narrower and the processing shape accuracy is more excellent. FIG. 12 shows a comparison result of the cross-sectional shape of the processed groove when the workpiece is SK5 and phosphor bronze. The processing conditions at this time are the same as in Table 1 except for the material of the workpiece. As shown in FIG. 12, both have excellent machining shape accuracy, but it can be seen that, particularly when the workpiece is SK5, the machining groove is formed more sharply. For this reason, when more precise processing is required, it is preferable to use an aqueous sodium nitrate solution as the electrolytic solution.

  When shape processing is performed by the electrolytic solution jet processing method, it is possible to use an electrolytic solution jet in which abrasive particles are mixed into the electrolytic solution as necessary and the abrasive particles are mixed. When the electrolytic solution jet mixed with abrasive grains is used, it is expected that the finished surface roughness is improved by the polishing action of the abrasive grains. In particular, when a passivated film is formed, the passive film is removed by collision of abrasive grains, and therefore the passivated film is removed only directly under the electrolyte jet to promote the electrolytic action. The shape accuracy is expected to improve.

  As explained above, using a jet nozzle that injects at least a linear electrolyte jet having an inner diameter of 1 mm or less, a single machining is performed according to machining conditions with different machining depths with little influence on the accuracy of the contour shape. When the groove is processed, the width of the processed groove depends on the inner diameter of the jet nozzle, and the deepest groove depth of the processed groove depends on energy, so that there is almost no error between the results. Can be simulated. Therefore, set the relative movement trajectory to combine multiple machining grooves according to the same or different machining conditions based on the superposition principle so that the desired contour shape can be obtained with the machining depth of the desired machining shape as the target The target machining can be easily performed by scanning the jet nozzle along the relative movement trajectory.

  FIG. 13 shows a photograph of an example in which an arbitrary shape is processed. The target machining shape is a width of 0.8 mm and the deepest machining depth is 30 μm. A jet nozzle having a diameter of 0.4 mm and a circular hole cross-section is used, the material of the workpiece is brass, and the electrolyte used is a 20 wt% sodium nitrate aqueous solution. As processing conditions that can be controlled, an electric current value of 300 mA and a relative moving speed (scanning speed) of 1.0 mm / second were set. The processing conditions were not changed and adjusted, and a plurality of processing grooves were overlapped and processed. The relative movement trajectory is obtained by simulating from the machining shape of a single machining groove measured when brass is machined under the same machining conditions using the same jet nozzle and electrolytic solution. FIG. 14 shows the processing result with the cross-sectional shape of the processing shape at this time. The processing time at this time was 230 seconds.

  The electrolytic solution processing method of the present invention can be used in the field of processing of dies such as microlenses and micro grooves of a dynamic pressure bearing of a hard disk spindle. The present invention broadens the application range of electrolytic machining, and is useful for improving workability and performance in machining precision parts.

It is a block diagram which shows the structure of the outline of the electrolyte solution jet processing apparatus for implementing this invention. It is a perspective view which shows the example of a process of the single process groove | channel in embodiment of this invention. It is sectional drawing which shows the groove shape of the single process groove | channel of FIG. FIG. 3 is a cross-sectional view showing a comparison between a predicted groove shape simulated based on the superposition principle when a single processed groove in FIG. 2 is overlaid and a groove shape after actual processing. It is a photograph of the pit which shows embodiment of this invention. It is sectional drawing which shows the hole shape of the jet nozzle used by the process of the process shape shown in FIG. It is a graph which shows the relationship between the gap obtained by embodiment of FIG. 5, and the shape of a pit. It is a graph which shows the relationship between the electrolyte solution pressure obtained by embodiment of FIG. 5, and the shape of a pit. It is a graph which shows the relationship between the electric current obtained by embodiment of FIG. 5, and the shape of a pit. It is a graph which shows the relationship between the electric current in the certain process time obtained by embodiment of FIG. 5, the shape of a pit, and process depth. It is a graph which shows the result of having compared the cross-sectional shape of the single process groove | channel when using sodium chloride aqueous solution, and using sodium nitrate aqueous solution. It is the graph which compared the cross-sectional shape of the single process groove | channel in the case where the aqueous solution of sodium nitrate is used and the to-be-processed object is steel, and the case of phosphor bronze. It is a photograph which shows the Example of this invention. It is sectional drawing which shows the cross-sectional shape of the process shape of the Example of FIG.

Explanation of symbols

1 Jet nozzle 2 Constant current power supply (processing power supply)
3 Workpiece 4 Pressure-resistant tank 5 Air regulator 6 Air compressor 7 Z-axis moving body 8 Processing table 9 Splash guard 10 Liquid tank

Claims (6)

  An electrolyte jet nozzle is connected to a cathode of a machining power source, a workpiece is connected to an anode of the machining power source, and a linear electrolyte jet is ejected from the nozzle onto the workpiece, and the nozzle is applied to the workpiece. In the electrolytic solution jet machining method in which the workpiece is electrolytically moved relative to the workpiece, the machining groove according to the machining conditions set so as to obtain a desired contour shape and machining depth based on the principle of superposition is provided. An electrolytic solution jet machining method characterized in that a relative movement trajectory of the nozzles is set in an overlapping manner, and the nozzle is scanned along the relative movement trajectory to process a desired machining shape.   The electrolytic solution jet machining method according to claim 1, wherein the desired machining depth is obtained by operating a current supplied from the machining power source.   An electrolyte jet nozzle is connected to a cathode of a machining power source, a workpiece is connected to an anode of the machining power source, and a linear electrolyte jet is ejected from the nozzle onto the workpiece, and the nozzle is applied to the workpiece. In an electrolytic solution jet machining method in which a workpiece is electrolytically moved relative to the workpiece, the hole cross-sectional shape of the nozzle is set to a shape corresponding to an edge or a corner of a desired machining shape, and the nozzle is as far as possible to the machining surface. An electrolytic solution jet machining method characterized in that a desired machining shape is machined so as to transfer the hole cross-sectional shape by making the pressure of the electrolyte solution to be supplied close to the pressure and transferring the hole cross-sectional shape.   The electrolytic solution jet machining method according to claim 3, wherein the desired machining depth is obtained by controlling a moving speed of the nozzle to manipulate a machining time.   3. The desired processing shape is processed while forming a passivated film on the surface of the workpiece using an aqueous solution of sodium nitrate as an electrolytic solution of the electrolytic solution jet. The electrolytic solution jet processing method according to claim 3 or 4.   6. The electrolytic solution processing method according to claim 1, wherein the electrolytic solution is mixed with abrasive grains.