JPH11226819A - Surface treating device, surface treating method and recording medium recording surface treating program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply a surface treating film to an edge surface of a treated workpiece, by easily automatically outputting a proper electrode route, without a worker's operation. SOLUTION: An electrode route is formed by an electrode route forming device 104 provided with a data storage part 1002 storing a shape data of a treated workpiece, contour data extraction part 1003 extracting an edge contour data of at least protruded shape from the shape data, and an electrode route forming part 1005 using the extracted data to form a route data of an electrode. Voltage is applied between the electrode and the treated workpiece, to generate a discharge, and by scanning the electrode in accordance with the electrode route, a surface treating film is formed in a surface of an edge part of the treated workpiece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of producing a metal surface by generating a discharge between an electrode made of a surface treatment material or a material which is a base material of the surface treatment material and a conductive material such as a metal to be treated. The present invention relates to a surface treatment apparatus, a surface treatment method, and a recording medium on which a surface treatment program is recorded.

[0002]

_2. Description of the Related Art A technique for imparting corrosion resistance and abrasion resistance by coating a surface of a metal material or the like by in-liquid discharge is, for example, a method of mixing a TiH ₂ (titanium hydride) -based powder and compressing and molding the liquid. 2. Description of the Related Art An electrode material is deposited on a work by performing a medium discharge. Coding targets include cutting tools such as end mills, press die dies, and punch cutting blades.

FIG. 17 is a configuration diagram showing a conventional surface treatment apparatus using electric discharge, and shows a state of processing on a cutting blade portion of a press die. In the drawing, 1 is a die which is a material to be processed,
3 is an electrode, 4 is a surface treatment film (modified layer), 100 is a surface treatment device, 101 is a processing tank, 102 is a control device, 103 is a power supply, and the surface treatment film 4 is a material (die) 1 for processing. It is formed at the edge. When cutting the die or punch of the press die, it is necessary to scan the electrode 3 in a complicated manner along the cutting edge shape, that is, the edge of the shape. This was realized by the operator programming the electrode operation.

[0004]

A conventional surface treatment apparatus,
And the surface treatment method is performed as described above, the operator must program the electrode path on the control device in advance, and the surface treatment for complicated shapes becomes complicated, and it is virtually impossible to set. There was a drawback.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made without impeding the hands of an operator.
An object of the present invention is to provide a surface treatment apparatus and a surface treatment method that can easily output an appropriate electrode path.
It is another object of the present invention to provide a recording medium on which the above surface treatment program is recorded.

[0006]

According to a first aspect of the present invention, there is provided a surface treatment apparatus which applies a voltage between an electrode made of a surface treatment material or a material which is a source of the surface treatment material and a material to be treated, A data storage for storing shape data of the material to be processed in a device for forming a surface treatment film on the surface of an edge portion of the material to be processed by scanning the electrode with respect to the material to be processed while generating discharge. Unit, from the shape data, comprising a contour data extraction unit that extracts at least a convex edge contour data, and an electrode path generation unit that creates the path data of the electrode using the extracted data,
The area to be subjected to the surface treatment is automatically extracted.

[0007] A surface treatment apparatus according to a second configuration of the present invention is the surface treatment apparatus according to the first configuration, wherein the contour data extraction unit includes:
The selection data for selecting the processing portion is extracted from the edge contour data of the convex shape extracted from the shape data.

According to a third aspect of the present invention, in the surface treatment apparatus according to the first or second aspect, the electrode path generating section is configured such that the electrode path generating section has an arbitrary offset with respect to the data extracted by the contour data extracting section. An electrode path is generated based on the input data.

In the surface treatment apparatus according to the fourth aspect of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material which is a base material of the surface treatment material and a material to be treated, and the above-described electric discharge is generated while generating a discharge. By scanning an electrode with respect to the material to be processed, a surface treatment film is formed on the surface of the edge portion of the material to be processed, and a speed data detector that detects feed speed data of the electrode, A processing area calculation unit that calculates a processing area and a processing direction calculation unit that calculates a processing progress direction from the calculated processing area are provided, and a region to be subjected to surface processing is automatically extracted.

A surface treatment apparatus according to a fifth aspect of the present invention is the surface treatment apparatus according to the fourth aspect, further comprising a pulse number detecting section for detecting the number of discharge pulses, wherein the processing area calculation section calculates the processing area based on the speed data and the pulse number. Is calculated.

In the surface treatment apparatus according to a sixth aspect of the present invention, in the fourth or fifth aspect, the processing direction calculation section adjusts the processing progress direction so that the calculated processing area becomes constant. Things.

According to a seventh aspect of the present invention, in the surface treatment apparatus according to any one of the fourth to sixth aspects,
Prior to the surface treatment, the electrodes are manually scanned in advance, thereby designating a rough path of the electrode scanning.

[0013] In the surface treatment method according to the first method of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material that is a base material of the surface treatment and a material to be treated, and the above-described method is performed while generating discharge. By scanning the electrode with respect to the material to be processed, when forming a surface treatment film on the surface of the edge portion of the material to be processed, at least convex edge contour data is extracted from the shape data of the material to be processed. Then, the path data of the electrode is created using the extracted data.

In the surface treatment method according to the second method of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material which is a base material of the surface treatment and a material to be treated, and the discharge is generated while generating a discharge. By scanning the electrode with respect to the material to be processed, when forming a surface treatment film on the surface of the edge portion of the material to be processed, detecting the feed speed data of the electrode,
The processing area is calculated from the speed data, and the processing progress direction is calculated.

The recording medium on which the surface treatment program according to the first aspect of the present invention has been recorded has a step of extracting at least convex edge contour data from the shape data of the material to be subjected to the surface treatment. Creating a path data of the electrode using, and applying a voltage between the electrode and the material to be processed, by scanning the electrode according to the path data while generating discharge, the The step of forming a surface treatment film on the surface of the edge portion is performed.

In the recording medium on which the surface treatment program according to the second configuration of the present invention is recorded, a voltage is applied between the electrode and the material to be processed, and the electrode is moved with respect to the material to be processed while generating a discharge. Scanning, forming a surface treatment film on the surface of the edge portion of the workpiece, detecting a scanning speed of the electrode with respect to the workpiece, calculating a processing area from the speed data, Calculating a processing direction from the processing area, and scanning the electrode in the calculated processing direction.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described by taking as an example a case where surface treatment is performed on a die cutting edge portion of a press die. FIG. 1 is a configuration diagram showing a surface treatment apparatus using discharge according to Embodiment 1 of the present invention.
In the figure, 1 is a die which is a material to be processed, 3 is an electrode, 4 is a surface treatment film (modified layer), 100 is a surface treatment device, 101
Denotes a processing tank, 102 denotes a control device, 103 denotes a power supply, and 104 denotes an electrode path generation device that generates an electrode path. FIG.
FIG. 2 is a block diagram illustrating an electrode path generation device 104.
Reference numeral 1001 denotes a data input unit for inputting and processing data from a keyboard or a mouse (not shown) or the like; 1002, a CAD data storage unit for storing a shape to be processed;
A contour data extraction unit 1004 for extracting contour data of a convex portion from the CAD data stored in the D data storage unit 1002;
, A data display unit for displaying data on a display (not shown); 1005, an electrode path generation unit for generating an electrode path from the extracted contour data; 1006, a control unit 102
And a data output unit for transferring the electrode path data to the data output unit.

Next, the operation of the surface treatment apparatus according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. On the display, the shape data of the material to be processed stored in the CAD data storage unit 1002 is displayed. An operator selects shape data of a material to be subjected to surface treatment from a keyboard (not shown) (step ST1). The data display unit 1004 displays the selected shape data (step ST2). FIG. 4 shows an example of the displayed shape data. The operator has a menu (not shown),
When "automatic contour extraction" is selected from the menu (step ST3), the contour data extraction unit 1003 extracts convex edge contour data to be subjected to discharge surface treatment (step S3).
T4). The extraction of the edge contour data is performed, for example, as follows. Assuming that the shape data is internally represented by solid data, first, surface data of the upper surface of the selected material to be processed is extracted, and loop data representing a surface edge is extracted from the extracted surface data. Of the extracted loop data, the outermost data is the edge of the work, so that only the inner data is used without being used. Data display unit 100
Reference numeral 4 emphasizes the extracted edge portion and displays it as shown in FIG. The electrode path generation unit 1005 converts the extracted contour data into α (electrode radius>
α> 0) The electrode path data is generated from the offset data (step ST5), and output from the data output unit 1006 to the control device 102 (step ST6). The control device 102 performs surface treatment by scanning the electrodes along the electrode paths (step ST7).

In the present embodiment, the input shape data is three-dimensional. However, any shape data may be used as long as it represents two-dimensional data or another form. Further, the offset value α may be predetermined or set by an operator.

According to the present embodiment, the contour path of the edge portion requiring the surface treatment is automatically extracted based on the shape data of the material to be processed, and the electrode path is generated. This makes it possible to easily output an appropriate electrode path without bothering the user.

The calculation of the electrode path in the surface treatment by the discharge as described above is realized by a surface treatment program, and the program is provided as a recording medium. For example, in the above embodiment, the electrode path generation device 10 of FIG.
4 is stored in the hard disk of the computer.

Embodiment 2 FIG. FIG. 7 is a block diagram showing an electrode path generation device 104 according to the second embodiment of the present invention. In the figure, reference numeral 1007 denotes a user-selected contour data extraction unit, and 1008 denotes a user-selected contour data storage unit.

Next, the operation will be described. FIG. 8 is a flowchart showing the operation of the surface treatment apparatus according to Embodiment 2 of the present invention. On the display, the shape data of the material to be processed stored in the CAD data storage unit 1002 is displayed. The operator selects shape data of the material to be subjected to the surface treatment from a keyboard (not shown) (step ST).
1). The data display unit 1004 displays the selected shape data (step ST2). FIG. 4 shows an example of the displayed shape data. The operator has a menu and a sub-menu (not shown). When the user selects “extract processing part” from the menu, the sub-menu includes “contour”, “edge”, “part of the edge”, “corner” and a display (not shown). The operator selects a part to be subjected to surface treatment from these submenus (step ST8), and picks a processing part of the selected part with a mouse (step ST9). Picking is performed continuously. FIG. 9 shows the difference between “contour”, “edge”, “part of edge”, and “corner” in the second embodiment.
The user-selected contour data extraction unit 1007 extracts contour data relating to the selected processing portion, for example, a loop including a picked point when “contour” is selected. If “edge” is selected, a line segment including the picked portion and cut at the corner is extracted.
If "part of the edge" is selected, two points are picked and the enclosed line segment is extracted. If a corner is selected, a line segment is extracted from the picked corner to a point separated by α mm (pre-input) at a branch in two directions. The contour data thus obtained is stored in the user-selected contour data storage unit 1008 (Step S
T10). The data display unit 1004 colors the selected processing part and displays it as shown in FIG. Electrode path generator 10
05 generates electrode path data from data obtained by offsetting the selected contour data by α (electrode radius>α> 0) in the direction of the material to be processed (step ST5), and outputs data from the data output unit 10.
06 to the control device 102 (step ST
6). The control device 102 performs surface treatment by scanning the electrodes along the electrode paths (step ST7).

According to the present embodiment, only the portion requiring surface treatment is extracted by the operator from the shape of the material to be processed. An appropriate electrode path can be output only for a simple edge.

The second embodiment is also effective in combination with the first embodiment.

Embodiment 3 FIG. FIG. 10 is a configuration diagram showing a discharge surface treatment apparatus according to Embodiment 3 of the present invention. In the figure, reference numeral 1020 denotes a processing direction determining device. FIG. 11 is a block diagram showing a processing direction determination device 1020. Reference numeral 1021 denotes a processing speed data detection unit; 1022, a processing area calculation unit that calculates a processing area from processing speed data;
A reference processing area storage unit 024 stores a processing area serving as a reference, a processing direction calculation unit 1023 calculates a processing progress direction from a processing area, and a processing direction storage unit 1025 stores a current processing direction.

Next, the operation will be described. FIG. 12 is a flowchart showing the operation of the surface treatment apparatus according to the third embodiment of the present invention, and FIGS. 13 and 14 are explanatory diagrams illustrating the operation of the surface treatment apparatus according to the third embodiment of the present invention. The operator specifies an "electrode initial lowering position" and an "initial processing direction" from the keyboard (step ST1). FIG.
In the case of 3, the initial electrode lowering position is designated as “0, 0” and the initial processing direction is designated as “Y +”. The designated initial processing direction is stored in the processing direction storage unit 1025 (step ST
2). Control device 102 lowers electrode 3 to the specified position and starts processing in the specified direction (step ST
3). When the processing is started, the processing speed data detection unit 102
1 detects the surface treatment speed data by detecting the feed speed of the electrode every A seconds (A> 0) (step ST).
14, step ST15). Processing area calculation unit 1022
Calculates a processing area from the detected processing speed data (step ST16). If the discharge is stable, the discharge frequency is constant, so that the processing area can be calculated from the processing progress amount (processing speed) for a certain time. The processing direction calculation unit 1023 that calculates the processing direction of the electrode compares the calculated processing area with the processing area stored in the reference processing area storage unit 1024. If the difference is equal to or greater than b (b> 0), the processing direction is calculated. Correct the direction to the correct direction (step ST1)
7, step ST18). For example, shifting to the right by 30 degrees is performed. FIG. 14 shows a case where the area changes at point A. Since a change in the processing area indicates that the processing direction is incorrect, the tool path direction is shifted to the right or left. If the shifting direction is reversed, the area is increasingly shifted from the initial processing area, and in that case, the processing is performed in the correct direction by shifting in the opposite direction (Step S).
T19, step ST20, step ST21). FIG.
FIG. 4 shows that the processing direction is stabilized at the point B. In step ST22, by examining the difference between the current position and the electrode initial position, when the difference approaches 0,
The electrode is returned to the initial position, and it is determined that the processing is completed, and the surface processing is terminated.

According to the present embodiment, since the electrodes are automatically scanned along the edges requiring surface treatment, there is no need to program the electrode operation in advance, and the operator's hand is troubled. Instead, appropriate surface treatment can be easily performed.

In this embodiment, the operator inputs the electrode initial position. However, the electrode may be directly moved from the control device to the initial position.

The calculation for determining the processing direction in the surface treatment by the discharge as described above is realized by a surface treatment program, and the program is provided as a recording medium. For example, in the above embodiment, the information is stored in the hard disk of the computer constituting the processing direction determination device 1020 in FIG.

Embodiment 4 FIG. In the third embodiment, the processing speed is detected as a method of calculating the processing area. However, the discharge frequency within a certain period of time, that is, the number of discharge pulses is detected, and the value obtained by dividing the processing speed by the number of pulses is used. ,
A more accurate area can be obtained regardless of the processing state. The configuration diagram of the processing direction determination device 1020 in that case is as shown in FIG. In FIG. 15, processing speed data
The pulse number detection unit 1026 detects the processing speed and the number of discharge pulses per unit time, and calculates the processing area based on a value obtained by dividing the processing speed by the number of pulses. That is, since the above value and the processing area are proportional, the processing area can be obtained based on the above value. The following operation is the same as in the third embodiment.

Embodiment 5 FIG. 16 is a block diagram showing a processing direction determining apparatus according to Embodiment 5 of the present invention. In the drawing, reference numeral 1027 denotes a teaching data storage unit which manually scans the electrodes before processing, specifies an outline of the electrode path, and stores the electrode path data specified by the teaching. Processing direction determination device 1
At 020, the data output unit 1006 inputs the electrode path stored in the teaching data storage unit 1027 and calculates the data in the same manner as in the third embodiment based on the speed data detected by the processing speed data detection unit 1021. The processing direction may be input from the processing direction calculation unit 1023, and the processing direction may be adjusted along the above-described electrode path, so that further accuracy can be achieved.

[0033]

According to the first aspect of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material which is a base material of the surface treatment material and a material to be treated, and the above-described process is performed while generating a discharge. By scanning the electrode with respect to the workpiece,
A data storage section for storing shape data of the material to be processed, and contour data for extracting at least convex edge data from the shape data. Since an extraction unit and an electrode path generation unit that creates the path data of the electrodes using the extracted data are provided, an appropriate electrode path can be automatically automatically generated without bothering the operator. Can be extracted.

According to the second configuration of the present invention, in the first configuration, the contour data extracting unit selects a processing portion from the convex edge contour data extracted from the shape data. Since data is extracted, an appropriate electrode path can be easily output only for a necessary edge.

According to the third configuration of the present invention, in the first or second configuration, the electrode path generation unit offsets the data extracted by the contour data extraction unit by an arbitrary amount. Since the electrode path is generated based on the data, there is an effect that unevenness of consumption, that is, only one side of the electrode is extremely consumed, that is, non-uniform consumption is reduced, and that the electrode is wasted and processing is stabilized.

According to the fourth configuration of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material serving as a base material of the surface treatment material and a material to be treated, and the electrode is generated while discharging. In a device for forming a surface treatment film on the surface of the edge portion of the material to be processed by scanning the material to be processed, a speed data detector for detecting feed speed data of the electrode, and a processing area from the speed data. And a processing direction calculation unit that calculates the processing direction from the calculated processing area, so that there is no need to program the electrode path in advance, and the edge that requires surface processing can be easily obtained. There is an effect that the electrode can be automatically scanned along the line.

According to a fifth aspect of the present invention, in the fourth aspect, a pulse number detecting section for detecting the number of discharge pulses is provided, and the processing area calculating section calculates the processing area from the speed data and the pulse number. Therefore, there is an effect that the electrode path can be calculated more accurately.

According to the sixth configuration of the present invention, in the fourth or fifth configuration, the processing direction calculation unit adjusts the processing progress direction so that the calculated processing area becomes constant. There is an effect that the processing direction can be easily adjusted.

According to the seventh aspect of the present invention, in any one of the fourth to sixth aspects, before the surface treatment,
By manually scanning the electrodes in advance, the general route of the electrode scanning is specified, so that the processing direction can be more accurately adjusted.

According to the first method of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material which is a base material of the surface treatment material and the material to be treated, and the electrode is discharged while generating a discharge. By scanning the material to be processed, when forming a surface treatment film on the surface of the edge portion of the material to be processed, from the shape data of the material to be processed, extract at least convex edge contour data, Since the path data of the electrodes is created using the extracted data, an appropriate electrode path can be automatically and easily extracted without bothering the operator.

According to the second method of the present invention, a voltage is applied between an electrode made of a surface treatment material or a material which is a base material of the surface treatment material and a material to be treated, and the electrode is discharged while generating a discharge. By scanning on the material to be processed, when forming a surface treatment film on the surface of the edge of the material to be processed, detect the feed speed data of the electrode, calculate the processing area from the speed data Since the processing direction is calculated, there is no need to program the electrode path in advance, and there is an effect that the electrode can be easily and automatically scanned along the edge requiring the surface treatment.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a surface treatment apparatus using electric discharge according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an electrode path generating device according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the surface treatment apparatus according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating an operation of the surface treatment apparatus according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating an operation of the surface treatment apparatus according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating an operation of the surface treatment device according to the first embodiment of the present invention.

FIG. 7 is a block diagram showing an electrode path generation device according to a second embodiment of the present invention.

FIG. 8 is a flowchart showing an operation of the surface treatment apparatus according to the second embodiment of the present invention.

FIG. 9 is an explanatory diagram illustrating an operation of the surface treatment apparatus according to the second embodiment of the present invention.

FIG. 10 is a configuration diagram showing a surface treatment apparatus by electric discharge according to a third embodiment of the present invention.

FIG. 11 is a block diagram showing an electrode path generating device according to a third embodiment of the present invention.

FIG. 12 is a flowchart showing an operation of the surface treatment apparatus according to the third embodiment of the present invention.

FIG. 13 is an explanatory diagram illustrating an operation of the surface treatment apparatus according to the third embodiment of the present invention.

FIG. 14 is an explanatory diagram illustrating an operation of the surface treatment apparatus according to the third embodiment of the present invention.

FIG. 15 is a block diagram showing an electrode path generating device according to a fourth embodiment of the present invention.

FIG. 16 is a block diagram showing an electrode path generation device according to a fifth embodiment of the present invention.

FIG. 17 is a configuration diagram showing an operation of a conventional surface treatment apparatus using electric discharge.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Material to be processed, 3 electrodes, 4 Surface treatment films, 100 Surface treatment device, 101 Processing tank, 102 Control device, 103
Power supply, 104 electrode path generation device, 1001 data input unit, 1002 CAD data storage unit, 1003 contour data extraction unit, 1004 data display unit, 1005
Electrode path generation unit, 1006 Data output unit, 1007
User-selected contour data extraction unit, 1008 User-selected contour data storage unit, 1020 Processing direction determination device, 102
1 processing speed data detection unit, 1022 processing area calculation unit, 1023 processing direction calculation unit, 1024 reference processing area storage unit, 1025 processing direction storage unit, 1026 processing speed data / pulse number detection unit, 1027 teaching data storage unit.

Claims (11)

[Claims] 1. A voltage is applied between an electrode made of a surface treatment material or a material that is a source of the surface treatment material and a material to be treated, and the electrode is scanned with respect to the material to be treated while generating a discharge. By forming a surface treatment film on the surface of the edge portion of the material to be processed, a data storage unit for storing shape data of the material to be processed, and extracting at least a convex edge contour data from the shape data A surface processing apparatus, comprising: a contour data extracting unit that performs the above-described processing; and an electrode path generating unit that generates the above-described electrode path data using the extracted data. 2. The surface processing apparatus according to claim 1, wherein the contour data extracting unit extracts selected data obtained by selecting a processing portion from the convex edge contour data extracted from the shape data. . 3. The electrode path generating unit according to claim 1, wherein the electrode path generating unit generates an electrode path based on data obtained by offsetting the data extracted by the contour data extracting unit by an arbitrary amount. Surface treatment equipment. 4. A voltage is applied between an electrode made of a surface treatment material or a material which is a source of the surface treatment material and a material to be treated, and the electrode is scanned with respect to the material to be treated while generating discharge. By forming a surface treatment film on the surface of the edge portion of the material to be processed, a speed data detection unit that detects feed speed data of the electrode, a processing area calculation unit that calculates a processing area from the speed data, A surface processing apparatus comprising: a processing direction calculation unit configured to calculate a processing progress direction from a calculated processing area; and automatically extracting a region to be subjected to surface processing. 5. The apparatus according to claim 4, further comprising a pulse number detector for detecting the number of discharge pulses, wherein the processing area calculator calculates the processing area from the speed data and the number of pulses.
The surface treatment apparatus as described in the above. 6. The surface processing apparatus according to claim 4, wherein the processing direction calculation unit adjusts the processing progress direction so that the calculated processing area becomes constant. 7. The surface treatment apparatus according to claim 4, wherein a rough path of the electrode scanning is designated by manually scanning the electrodes in advance before the surface treatment. 8. A voltage is applied between an electrode made of a surface treatment material or a material which is a source of the surface treatment material and a material to be treated, and the electrode is scanned with respect to the material to be treated while generating a discharge. Thereby, when forming a surface treatment film on the surface of the edge portion of the material to be processed, at least convex edge contour data is extracted from the shape data of the material to be processed, and the electrode is formed using the extracted data. A surface treatment method characterized by generating path data of a surface. 9. A method in which a voltage is applied between an electrode made of a surface treatment material or a material that is a source of the surface treatment material and a material to be treated, and the electrode is scanned with respect to the material to be treated while generating discharge. Thereby, when forming a surface treatment film on the surface of the edge portion of the material to be treated, detect the feed speed data of the electrode, calculate the processing area from the speed data,
A surface treatment method comprising calculating a treatment progress direction. 10. A step of extracting at least convex edge contour data from shape data of a material to be subjected to a surface treatment, a step of creating path data of an electrode using the extracted data, A step of forming a surface treatment film on the surface of the edge portion of the material to be processed by applying a voltage between the material to be processed and scanning the electrode according to the path data while generating discharge. A recording medium on which a surface treatment program is recorded. 11. Applying a voltage between an electrode and a material to be processed and scanning the electrode with respect to the material to be processed while generating a discharge, so that the surface of the edge of the material to be processed is surface-treated. Forming a film, detecting a scanning speed of the electrode with respect to the material to be processed, calculating a processing area from the speed data, calculating a processing progress direction from the calculated processing area, and calculating And a step of scanning the electrode in the processing direction.