KR101853399B1 - Processing method using CNC wire cutting electrical discharge machine - Google Patents

Abstract

The present invention relates to a machining method using a CNC wire-cutting electrical discharge machine which can conveniently remove scrap by manual work. According to the present invention, the machining method comprises: a first step of setting and storing machining conditions; a second step of guiding a wire electrode by a first and a second electrode guide to move a reference point along an entry path when a point where a workpiece surface and the wire electrode meet is defined as the reference point to machine the entry path, and forming a triangular cut surface in a remaining portion by performing inclined machining for machining while allowing the wire electrode to be inclined at a prescribed angle on at least one point on the entry path; and a third step of machining a workpiece along a machining path from a machining start point to a machining end point while the wire electrode is vertically placed.

Description

[0001] The present invention relates to a CNC wire cutting electrical discharge machine,

The present invention relates to a machining method using a CNC wire cutting electric discharge machine, and more particularly, to a method for machining a CNC wire cutting electric discharge machine, which is capable of preventing a scrap from being arbitrarily short- And more particularly, to a CNC wire-cutting electric discharge machine capable of easily removing scrap by hand without requiring any machining.

Generally, a CNC (Wire Cutting) electrical discharge machining apparatus is a device for machining a desired shape by discharging between a wire electrode and a workpiece by using a fine wire having a diameter of about 0.05 to 0.33 mm.

Processing using CNC wire cutting electric discharge machine has been extended to fields requiring relatively complicated and precise machining such as a hard metal material such as a hard metal such as a hard metal.

In the wire cutting discharge machining using such a CNC wire cutting electric discharge machine, a negative current is applied to the wire electrode and a plus current is applied to or crossed the workpiece, and the wire electrode is machined into a predetermined shape by discharge occurring between the workpiece and the wire electrode.

In such a wire-cutting electric discharge machining, as shown in Fig. 1 (a), a workpiece 10 in which a wire insertion hole 12 is formed in advance is prepared. Next, in a state where the workpiece 10 is positioned between the upper guide and the lower guide of the CNC wire-cutting electric discharge machine, the wire electrode passes through the wire insertion hole 12 formed in the workpiece 10, And is connected between the upper guide and the lower guide to prepare for machining.

1 (b), the upper guide and the lower guide are vertically overlapped with each other, and the wire electrode is moved along a predetermined machining path 14 in a state in which the wire electrode is placed in a vertical direction Processing. If a predetermined shape is processed according to the machining, scrap that is discarded after machining is generated. Scrap refers to a portion to be removed when a predetermined shape is machined on the workpiece by wire cutting discharge machining.

When the scrap 16 is removed from the workpiece in the state shown in Fig. 1 (b), the workpiece 10 in the final machined state in which a predetermined desired shape is machined remains as shown in Fig. 1 (c).

However, the scrap 16 is processed in such a manner that the scrap 16 remains on the workpiece without being completely separated from the workpiece during the machining process. If the scrap 16 is completely removed from the workpiece during the machining process, the scrap falling and falling during the machining process collides with the main components of the wire-cut electric discharge machine, thereby causing an error or failure of the apparatus.

Due to such a problem, in the conventional case, as shown in FIG. 2A, which is an enlarged view of the portion "A" in FIG. 1B, the scrap 16 is completely removed from the workpiece 10 A first discharge machining is performed in which a certain residual portion R is left unprocessed on the machining path and the scrap 16 is removed through a separate secondary machining process after the first machining is completed come.

However, such secondary discharge machining requires additional time and is a waste of costs. In order to solve such a problem, improvement has been required in such a manner that only the primary discharge machining is performed and the secondary discharge machining is not carried out but the secondary discharge machining is performed manually. Thus, while maintaining the remaining distance, An optimal remaining distance d for preventing the scrap from being released in the disclosure has been calculated. Accordingly, if the remaining distance L is about 0.05 mm, scrap can be removed manually.

However, this method is possible when the thickness of the workpiece is less than a certain thickness (for example, 10 mm or less), but when the thickness of the workpiece is greater than a certain thickness, the thickness of the remaining portion d is equal to the thickness of the workpiece, There is a problem that scrap can not be removed.

That is, as shown in FIG. 2 (b), which is a sectional view of the AA portion in FIG. 2A, the remaining distance R on the machining path is shortened to about 0.05 mm. However, (For example, 10 mm or more), it is difficult to remove the scrap 16 by hand.

 In this case, since the distance L in the horizontal direction of the remaining portion is short but the thickness T in the vertical direction is long, it can not be removed by hand. In this case, the scrap 16 must be removed through a separate secondary discharge process.

Accordingly, even when the thickness of the workpiece is thicker than a certain thickness, there has been a demand for a method that can easily remove scrap by hand without performing secondary discharge machining.

Korean Patent Publication No. 10-2016-0029420 (2013.03.15)

Accordingly, it is an object of the present invention to provide a machining method using a CNC wire-cutting electric discharge machine capable of overcoming the above-mentioned conventional problems.

It is another object of the present invention to provide a machining method using a CNC wire-cutting electric discharge machine which can easily remove scrap by hand without secondary discharge machining even when the thickness of the workpiece is thicker than a certain thickness.

According to an embodiment of the present invention, a wire electrode connected to a first electrode guide and a second electrode guide according to the present invention is used to connect the first electrode guide and the second electrode guide A machining path for a desired shape of the workpiece, a wire insertion hole formed in the scrap, and a machining start point on the machining path from the wire insertion hole to the machining start point on the machining path A machining condition including a machining end point of the machining path and a machining end point that is spaced apart from the machining start point by a predetermined residual portion is set and stored; The wire electrode is guided through the first electrode guide and the second electrode guide so that the reference point moves along the entry path when the point where the workpiece surface and the wire electrode meet is defined as a reference point, A second step of forming a triangular cut surface inside the remaining portion by performing a tilting process to tilt the wire electrode at a predetermined angle at least at any point on the entry path; And a third step of machining the workpiece along the machining path from the machining start point to the machining end point in a state in which the wire electrode is positioned in the vertical direction.

Wherein the workpiece is positioned between the first electrode guide and the second electrode guide between the first step and the second step or before the first step and the wire electrode is positioned between the wire insertion hole formed in the workpiece And connecting the first electrode guide and the second electrode guide in a state of passing through the first electrode guide and the second electrode guide.

Wherein when defining a direction toward the machining end point on the entry path or a direction perpendicular to the entry path in a first direction and a direction opposite to the first direction as a second direction, The first electrode guide is moved in the second direction while the second electrode guide is fixed in the wire insertion hole position and the second electrode guide is moved in the first direction to perform the tilting process, Forming a cut surface; The workpiece is processed while moving the first electrode guide and the second electrode guide so that the reference point moves along the entry path to the machining start point while the inclination of the wire electrode is maintained, Forming an angled incline cut surface; By moving the first electrode guide in the first direction and moving the second electrode guide in the second direction while the reference point is fixed at the machining start point, In the direction of the arrow.

When defining a direction toward the machining end point on the entry path or a direction perpendicular to the entry path in a first direction and defining a direction opposite to the first direction as a second direction, Performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the wire insertion hole position to the machining start point along the entry path in a state of lying in the vertical direction Wow; The first electrode guide is moved in the second direction and the second electrode guide is moved in the first direction while the reference point is fixed at the machining start point, Forming a cut surface of a triangular shape on the surface; The first electrode guide is moved in the first direction and the second electrode guide is moved in the second direction in a state where the reference point is fixed at the machining start point position so that the wire electrode is placed in the vertical direction Step.

When defining a direction toward the machining end point on the entry path or a direction perpendicular to the entry path in a first direction and defining a direction opposite to the first direction as a second direction, While the first electrode guide and the second electrode guide are moved such that the reference point moves from the wire insertion hole position to a predetermined first point on the entry path while the first electrode guide and the second electrode guide are in the vertical direction ; By moving the first electrode guide in the second direction while moving the second electrode guide in the first direction while the reference point is fixed to the first point position, Forming a triangular shaped cut surface in the inside; The workpiece is processed while moving the first electrode guide and the second electrode guide so that the reference point moves along the entry path to the machining start point while the inclination of the wire electrode is maintained, Forming an angled incline cut surface; By moving the first electrode guide in the first direction and moving the second electrode guide in the second direction while the reference point is fixed at the machining start point, In the direction of the arrow.

When defining a direction toward the machining end point on the entry path or a direction perpendicular to the entry path in a first direction and defining a direction opposite to the first direction as a second direction, While the first electrode guide and the second electrode guide are moved so that the reference point moves from the wire insertion hole position to a predetermined second point on the entry path while the first electrode guide and the second electrode guide are in the vertical direction ; By moving the first electrode guide in the second direction while moving the second electrode guide in the first direction while the reference point is fixed to the second point position, Forming a triangular shaped cut surface in the inside; The first electrode guide is moved in the first direction and the second electrode guide is moved in the second direction while the reference point is fixed at the second point position so that the wire electrode is placed in the vertical direction ; And performing the workpiece machining while moving the first electrode guide and the second electrode guide such that the reference point moves from the second point position to the machining start point along the entry path.

After the third step, the first electrode guide is moved in the first direction while the reference point is fixed to the machining end point position, and the second electrode guide is moved in the second direction while performing the tilting process Further forming a cut surface of a triangular shape in the interior of the workpiece corresponding to the remaining portion.

In the first step, a safety path spaced apart from the entry path by a predetermined condition and formed inside the scrap at the machining end point is additionally set and stored, and after the third step, The wire electrode may be inclined at a predetermined angle so that the wire electrode is inclined at least at any one point of the wire electrode, thereby further forming a triangular cut surface in the remaining portion.

Wherein the reference point refers to a first reference point at which the upper surface of the workpiece meets the wire electrode and the first electrode guide is an upper guide that is positioned on the upper side of the CNC wire cutting electric discharge machine to guide the wire electrode, The two-electrode guide may be a lower guide positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode.

Wherein the reference point refers to a second reference point at which the lower surface of the workpiece meets the wire electrode, and the first electrode guide is a lower guide that is positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode, The two-electrode guide may be an upper guide positioned above the CNC wire-cutting electric discharge machine to guide the wire electrode.

According to another embodiment of the present invention, a wire electrode connected to a first electrode guide and a second electrode guide according to the present invention is used to connect the first electrode guide and the second electrode guide A machining path for a desired shape of the workpiece, a wire insertion hole formed in the scrap, a machining start point on the machining path in the wire insertion hole, And a machining condition including a machining end point spaced by a predetermined residual portion at the machining start point or the ending point of the machining path is set and stored; Wherein a direction from the machining end point to the machining start point or the entry path is defined as a third direction and when a point at which the workpiece surface and the wire electrode meet is defined as a reference point, A second step of guiding and processing the wire electrode through the first electrode guide and the second electrode guide so that the reference point moves to the machining end point along the entry path and the machining path; The first electrode guide is moved in a fourth direction opposite to the third direction while the reference point is fixed to the machining end point position and the second electrode guide is moved in the third direction, And a third step of forming a triangular-shaped cut surface in the inside of the workpiece corresponding to the remaining portion by performing a tilting process to process the tilted workpiece at a predetermined angle.

Wherein the reference point refers to a first reference point at which the upper surface of the workpiece meets the wire electrode and the first electrode guide is an upper guide that is positioned on the upper side of the CNC wire cutting electric discharge machine to guide the wire electrode, The two-electrode guide may be a lower guide positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode.

Wherein the reference point refers to a second reference point at which the lower surface of the workpiece meets the wire electrode, and the first electrode guide is a lower guide that is positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode, The two-electrode guide may be an upper guide positioned above the CNC wire-cutting electric discharge machine to guide the wire electrode.

According to another aspect of the present invention, there is provided a method of manufacturing a plasma display panel including a first electrode guide and a second electrode using a wire electrode connected to a first electrode guide and a second electrode guide, A CNC wire cutting electric discharge machining method for machining a workpiece having a predetermined thickness placed between guides is characterized by comprising a machining path for a desired shape of the workpiece, a wire insertion hole formed in the scrap, A machining end point that is spaced apart from the entry path or a machining start point by a predetermined residual portion, a machining end point that is spaced apart from the ingress path by a predetermined distance and which is located at an inner end of the scrap at the machining end point A first step of setting and storing processing conditions including a safety path to be formed; Wherein the first electrode and the second electrode are arranged such that when the wire electrode is in a vertical direction, the reference point is moved to the machining end point along the entry path and the machining path when a point at which the workpiece surface and the wire electrode meet is defined as a reference point, A second step of processing the workpiece by guiding the wire electrode through a guide and a second electrode guide; The wire electrode is guided through the first electrode guide and the second electrode guide so that the reference point moves along the safety path, and the safety path is machined, and at least at any one point on the safety path, And a third step of forming a triangular-shaped cut surface inside the remaining portion by performing a tilting process of working while being inclined at a predetermined angle.

Between the first step and the second step. The workpiece is positioned between the first electrode guide and the second electrode guide, and the wire electrode is connected to the first electrode guide and the second electrode guide through the wire insertion hole formed in the workpiece, So as to prepare for machining.

Wherein a third direction is defined as a direction toward the entry path on the safety path and a fourth direction is defined as a direction opposite to the third direction so that the reference point is fixed at the machining end point position Forming a triangular cut surface in the workpiece by moving the first electrode guide in the fourth direction and moving the second electrode guide in the third direction while performing the tilting process; The first electrode guide and the second electrode guide are moved while the inclination of the wire electrode is maintained so that the reference point moves along the safety path to the end point of the safety path, And forming a sloped cut surface at a predetermined angle on the substrate.

The direction toward the entry path on the safety path is defined as a third direction and the direction opposite to the third direction is defined as a fourth direction. In the third step, the wire electrode is positioned in the vertical direction Performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the machining end point position to the end point of the safety path along the safety path; The first electrode guide is moved in the fourth direction and the second electrode guide is moved in the third direction while the reference point is fixed at the end point of the safety path, And forming a cut surface of a triangular shape inside the workpiece.

Wherein a third direction is defined as a direction toward the entry path on the safety path and a fourth direction is defined as a direction opposite to the third direction so that the reference point is fixed at the machining end point position Forming a triangular cut surface in the workpiece by moving the first electrode guide in the fourth direction and moving the second electrode guide in the third direction while performing the tilting process; The workpiece is processed while the first electrode guide and the second electrode guide are moved so that the reference point moves along the safety path to a predetermined third point on the safety path while the inclination of the wire electrode is maintained Forming an inclined cut surface at an angle within the workpiece; The first electrode guide is moved in the third direction and the second electrode guide is moved in the fourth direction in a state in which the reference point is fixed at the third point position so that the wire electrode is placed in the vertical direction ; And performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the third point position to the end point of the safety path along the safety path.

The direction toward the entry path on the safety path is defined as a third direction and the direction opposite to the third direction is defined as a fourth direction. In the third step, the wire electrode is positioned in the vertical direction Performing the workpiece machining while moving the first electrode guide and the second electrode guide such that the reference point moves from the machining end point position to a predetermined fourth point on the safety path; The first electrode guide is moved in the fourth direction while the second electrode guide is moved in the third direction while the reference point is fixed to the fourth point position, Forming a triangular shaped cut surface in the inside; The first electrode guide is moved in the third direction and the second electrode guide is moved in the fourth direction while the reference point is fixed at the fourth point position so that the wire electrode is placed in the vertical direction ; And performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the fourth point position to the end point of the safety path along the safety path.

Wherein the reference point refers to a first reference point at which the upper surface of the workpiece meets the wire electrode and the first electrode guide is an upper guide that is positioned on the upper side of the CNC wire cutting electric discharge machine to guide the wire electrode, The two-electrode guide may be a lower guide positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode.

Wherein the reference point refers to a second reference point at which the lower surface of the workpiece meets the wire electrode, and the first electrode guide is a lower guide that is positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode, The two-electrode guide may be an upper guide positioned above the CNC wire-cutting electric discharge machine to guide the wire electrode.

According to the present invention, even when the thickness of the workpiece is thicker than a predetermined thickness, the slope machining is performed so that the scrap can be easily removed by hand without performing the secondary discharge machining, thereby reducing costs and saving the entire machining time .

FIG. 1 illustrates a workpiece processing process using a conventional wire electric discharge machine,
FIG. 2 is a partially enlarged view and a cross-sectional view of FIG. 1,
3 is a schematic view of a CNC wire-cutting electric discharge machine according to embodiments of the present invention,
Fig. 4 shows an example of an entry path, a machining path, and a safety path, which are processing conditions for machining a workpiece,
FIG. 5 is a flowchart showing a process of a workpiece processing method using a CNC wire-cutting electric discharge machine according to embodiments of the present invention,
FIGS. 6 to 30 are views showing a first electrode guide, a second electrode guide, a position of a wire electrode, and a cross-sectional view of a workpiece in a workpiece processing process according to embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings without intending to intend to provide a thorough understanding of the present invention to a person having ordinary skill in the art to which the present invention belongs.

3 is a schematic view of a CNC wire-cutting electric discharge machine 100 according to embodiments of the present invention.

3, a CNC wire-cutting electric discharge machine 100 (hereinafter referred to as a "wire electric discharge machine") according to embodiments of the present invention includes a wire wound on a take-up reel 130, And a wire conveying part 140 composed of a driving motor. Thereafter, the wire is introduced into the upper guide 110 fastened to the lower end of the upper arm 115, which is fastened to the wire conveyance part 140 at its upper end. The upper guide 110 is moved by the upper arm 115 to guide the moving direction of the wire, and supplies power to the wire to process the work. The upper guide 110 is vertically movable in the vertical direction and movable in a direction such as a predetermined angle direction including front, rear, left, and right in the horizontal direction.

The wire that has passed through the upper guide 110 flows into the wire insertion hole of the workpiece and flows into the lower guide 120 fastened to one side of the lower arm 125 fastened to the bottom of the wire electric discharge machine 100, do. The lower guide 120 is not movable in a vertical direction and is configured to be movable in a direction such as a predetermined angle direction including front, back, left, and right in a horizontal direction. The wire transferred to the lower guide 120 is loaded on a wire bucket (not shown) via the lower arm 125, and then discarded.

Other configurations which are not essential to the wire electric discharge machine and which are not described are the same as those known to those of ordinary skill in the art.

In the present invention, for clarity of understanding, some terms will be defined.

The 'wire electrode' may refer to a wire portion provided between the upper guide 110 and the lower guide 120 of the wire electric discharge machine 100.

The 'first electrode guide' may refer to the upper guide 110 or the lower guide 120 of the wire electric discharge machine 100, and the 'second electrode guide' may refer to the upper guide 110 or the lower May refer to a guide 120. When the first electrode guide means the upper guide 110, the second electrode guide means the lower guide 120. When the first electrode guide means the lower guide 120, And the second electrode guide means the upper guide 110.

The 'reference point' may mean a virtual point where the surface of the workpiece to be machined meets the wire electrode. In particular, a point at which the upper surface of the workpiece meets a corresponding portion of the wire electrode is a first reference point, and a point at which a lower surface of the workpiece meets a corresponding portion of the wire electrode may be a second reference point.

The 'scrap' may mean a part where a predetermined desired shape is separated and removed by machining from the finished workpiece in the final machined state. Normally, a wire insertion hole used as a start hole in which wire processing is started in the scrap is formed.

The 'machining path' may refer to a path for machining a desired shape of the workpiece, that is, a path connecting the edges of the scrap when the scrap is not separated.

The 'entry path' may refer to a path entering the machining path from the wire insertion hole to the machining starting point of the machining path. The entry path is generally formed in the scrap portion.

The 'machining end point' may be a point of the machining path, which is a point spaced from the entry path or the machining starting point by a predetermined residual portion (or a remaining distance). The machining end point is set at a position separated by the remaining portion or the remaining distance (hereinafter collectively referred to as a "remaining portion") at the entry path or the machining start point, in order to prevent the scrap from separating away.

The 'safety path' may be a path formed at the scrap portion at a predetermined distance from the entry path and inside the scrap at the machining end point, to further facilitate the removal of the scrap. The safety path may be set parallel to the entry path. The safety path is not an essential machining path, but is a path added as needed.

The machining path, the entry path, the machining start point, the machining end point, the safety path, and the like are not displayed on the workpiece but are set and stored as machining conditions of the wire electric discharge machining apparatus. Only the wire insertion holes are formed in the workpiece. 4, for example, when it is desired to form a square hole in the workpiece 10 having a certain thickness, as shown in FIG. 4 (a), a wire insertion An entry path P1 from the hole h to the machining start point a and a machining path P2 with a rectangular shape extending from the machining start point a to the machining end point b along the arrow direction are set. At this time, a portion between the entry path P1 and the safety path P3 or between the machining start point a and the machining end point b corresponds to the remaining portion d which is left unprocessed to prevent separation and separation of scrap . In the case of FIG. 4 (b), the safety path P3 is additionally set as required in the machining conditions of FIG. 4 (a). That is, the safety path P3 formed on the side of the scrap S at the machining end point b is further set. The safety path P3 may be set parallel to the entry path P1 and may not be parallel to the entry path P1 so long as it does not meet the entry path P1.

The 'first direction' may mean either a direction from the machining start point toward the machining end point, a direction toward the machining end point or the safety path on the entry path, and a direction perpendicular to the entry path. The first direction may include all directions such as a direction perpendicular to the entry path and a direction forming a certain angle with the entry path as long as the direction is toward the machining end point or the safety path on the entry path.

The 'second direction' may mean the opposite direction of the first direction.

The 'third direction' may mean either a direction from the machining end point toward the machining start point, a direction toward the machining start point or the entry path on the safety path, and a direction perpendicular to the safety path. The third direction may include all directions such as a direction perpendicular to the safety path and a direction forming a certain angle with the safety path if the direction is the starting point or the entry path on the safety path.

The 'fourth direction' may mean a direction opposite to the third direction.

In some cases, the first direction and the fourth direction may be the same direction, and the second direction and the third direction may be the same direction.

Each embodiment of the workpiece processing method using the wire electric discharge machine will be described with reference to the wire electric discharge machine of FIG. Hereinafter, it is assumed that the machining conditions such as the entry path and the machining path are set as described in the examples of Figs. 4A and 4B.

In the working examples of the wire electric discharge machine in the embodiments of the present invention, in order to easily remove the scrap by hand without performing the secondary discharge machining even when the thickness of the workpiece is thicker than a certain thickness, . The slanting process is a process in which a triangular-shaped cut surface is formed on the upper side and / or the lower side of the remaining portion in order to reduce the thickness of the remaining portion that is left without being processed so that the scrap does not completely separate from the workpiece. Since the inclined machining is formed in the scrap portion, the desired shape of the workpiece in the machined state is not affected.

5 is a flow chart showing a process of a workpiece processing method using a wire electric discharge machine according to the first embodiment of the present invention.

5, in the first embodiment of the present invention, the first electrode guide refers to the upper guide 110 of the wire electric discharge machine 100, and the second electrode guide refers to the wire electric discharge machine 100 As shown in FIG. Also, the reference point may refer to a first reference point R1, which means a point where the upper surface of the workpiece 10 meets a corresponding portion of the wire electrode 150. [

First, in the state where the above-described machining conditions are set and stored (S110), machining starts with the wire insertion hole h as a machining start point. Before or after the step of setting and storing the processing conditions, a machining preparation step may be required.

The machining preparation step may be performed such that the workpiece 10 is positioned between the first electrode guide 110 and the second electrode guide 120 and the wire electrode 150 is positioned on the workpiece 10 May be connected between the first electrode guide 110 and the second electrode guide 120 while passing through the wire insertion hole h, thereby preparing the process.

Next, the wire electrode 150 is guided using the first electrode guide 110 and the second electrode guide 120 to start the wire insertion hole h as a machining start point. The entry path P1 is processed by guiding the wire electrode through the first electrode guide 110 and the second electrode guide 120 so that the reference point R1 moves along the entry path P1 S112).

At this time, the wire electrode 150 is inclined at a predetermined angle at least at any one point on the entry path P1, so that a triangular shaped cut surface ( C). Herein, the entry path P1 includes the position of the machining start point (a) and the position of the wire insertion hole (h).

That is, the slanting process may be performed when the reference point R1 is located at the wire insertion hole h, or may be performed when the reference point R1 is at the machining start point (a) It is possible that the workpiece R1 is located in the middle of the entry path P1, that is, at any point on the entry path P1 between the wire insertion hole h and the machining start point a.

The first method of processing the entry path P1 is a case where the tilting is performed when the reference point R1 is at the position of the wire insertion hole h. This will be described with reference to FIGS. FIGS. 6 to 9 show the positions of the first electrode guide, the second electrode guide, the wire electrode 150, and the cross-sectional view of the workpiece during the course of the entry path P1.

6, the first electrode guide 110 is moved in the second direction 2 while the reference point R1 is fixed at the position of the wire insertion hole h, The guide 120 is moved in the first direction 1. The movement distance of the second electrode guide 120 in the first direction 1 may vary depending on the thickness of the workpiece 10 and other processing conditions. The movement distance of the first electrode guide 110 in the second direction 2 increases corresponding to the movement distance of the second electrode guide 120 in the first direction 1, The first electrode guide 110 is moved in accordance with the moving distance of the second electrode guide 120 so that the wire electrode 150 is straightened while the first electrode guide 110 is fixed at the position of the wire insertion hole h do.

The wire electrode 150 is tilted at a predetermined angle with respect to the vertical direction in a straight line state to perform a tilting process so that a triangular cut surface C1 is formed inside the workpiece 10 . In this case, a cut surface C1 having a right triangular shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the second direction 2 and the movement distance of the second electrode guide 120 in the first direction 1 are increased, The area of the cut surface C1 of the triangular shape formed on the work 10 is increased and the vertical direction of the remaining portion d of the work 10 is increased, The thickness becomes smaller.

The movement of the first electrode guide 110 in the second direction 2 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the first direction 1 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

7, the reference point R1 is moved along the entry path P1 to the machining start point a, while maintaining the inclination of the wire electrode 150 as it is, The first electrode guide 110 and the second electrode guide 120 are moved while the entry path P1 of the workpiece 10 is processed to form an inclined cut surface C2 having a certain angle inside the workpiece 10 . The inclined cut surface C2 is formed from the wire insertion hole h to the machining start point a. When the reference point R1 is machined to move to the machining start point a, as shown in Fig. 8 which is a cross-sectional view of the workpiece 10 at the machining start point a, .

9, the first electrode guide 110 is moved in the first direction 1 (a) in a state in which the reference point R1 is fixed at the processing start point (a) And the second electrode guide 120 is moved in the second direction 2 so that the wire electrode 150 is placed in a vertical direction. In FIG. 6, if the wire electrode 150 placed in the vertical direction is processed while having a predetermined inclination with respect to the vertical direction, in contrast to the case of FIG. 9, the wire electrode 150 has a constant inclination with respect to the vertical direction And the processing is performed while being placed in the vertical direction in the state of holding.

In this case, a cut surface C3 having the same shape as the cut surface C1 of the triangular shape formed in FIG. 6 is formed in the lower part of the remaining part d or in the inside of the workpiece 10. As a result, the thickness in the vertical direction of the portion connecting the machining start point (a) to the machining end point (b) (remaining portion (d)) becomes small.

When the cutting surface C2 of the triangular shape is completed and the wire electrode 150 is placed in the vertical direction, the processing for the entry path P1 is completed.

The second method of machining the entry path P1 is the case where the tilting is performed when the reference point R1 is at the machining start point (a). This will be described with reference to FIGS. 10 to 12. FIG. FIGS. 10 to 12 show the positions of the first electrode guide, the second electrode guide, the wire electrode 150, and the cross-sectional view of the workpiece during the course of the entry path P1.

10, when the wire electrode 150 is positioned in the vertical direction, the reference point R1 is moved along the entry path P1 at the position of the wire insertion hole h, the workpiece 10 is processed while moving the first electrode guide 110 and the second electrode guide 120 so as to move the workpiece 10 to a predetermined position.

Next, as shown in FIG. 11, the first electrode guide 110 is moved in the second direction 2 while the reference point R1 is fixed at the processing start point (a) The guide 120 is moved in the first direction 1. The movement distance of the second electrode guide 120 in the first direction 1 may vary depending on the thickness of the workpiece 10 and other processing conditions. The movement distance of the first electrode guide 110 in the second direction 2 increases corresponding to the movement distance of the second electrode guide 120 and the reference point Rl is moved to the machining start point a, The first electrode guide 110 moves in accordance with the moving distance of the second electrode guide 120 so that the wire electrode 150 is straight.

The wire electrode 150 is tilted at a predetermined angle with respect to the vertical direction in a straight line state to perform a tilting process so that a triangular cut surface C4 is formed in the workpiece 10 . In this case, a cut surface C4 having a right triangle shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the second direction 2 and the movement distance of the second electrode guide 120 in the first direction 1 are increased, The angle of inclination with respect to the vertical direction becomes large so that the area of the triangular cut surface C4 formed on the workpiece 10 becomes large and the vertical direction of the remaining portion d of the workpiece 10 The thickness becomes smaller.

The movement of the first electrode guide 110 in the second direction 2 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the first direction 1 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

12, the first electrode guide 110 is moved in the first direction 1 while the reference point R1 is fixed at the processing start point a, The second electrode guide 120 is moved in the second direction 2 so that the wire electrode 150 is placed in the vertical direction. At this time, since the wire electrode 150 is returned to the vertical direction through the portion where the warp machining is already performed, no additional machining is performed.

When the wire electrode 150 is placed in the vertical direction, the processing for the entry path P1 is completed.

A third method of machining the entry path P1 is when the tilting is performed when the reference point R1 is at a predetermined first point e1 on the entry path. This will be described with reference to FIG. 13 through FIG. FIGS. 13 to 17 show the positions of the first electrode guide, the second electrode guide, the wire electrode 150, and the cross-sectional view of the workpiece 10 in the course of processing the entry path P1.

13, when the wire electrode 150 is positioned in the vertical direction, the reference point R1 is moved along the entry path P1 at the position of the wire insertion hole h, The first electrode guide 110 and the second electrode guide 120 are moved to move the workpiece 10 to a predetermined first point e1 on the workpiece P1.

14, the first electrode guide 110 is moved in the second direction 2 while the reference point R1 is fixed at the first point e1, and the second electrode guide 110 is moved in the second direction 2, The electrode guide 120 is moved in the first direction 1. The movement distance of the second electrode guide 120 in the first direction 1 may vary depending on the thickness of the workpiece 10 and other processing conditions. The movement distance of the first electrode guide 110 in the second direction 2 increases corresponding to the movement distance of the second electrode guide 120 and the reference point Rl increases at the first point e1 The first electrode guide 110 moves in accordance with the moving distance of the second electrode guide 120 so that the wire electrode 150 is straight.

The wire electrode 150 is tilted at a predetermined angle with respect to the vertical direction in a straight line state to perform a tilting process so that a triangular cut surface C5 is formed inside the workpiece 10 . In this case, a cut surface C5 having a right triangular shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the second direction 2 and the movement distance of the second electrode guide 120 in the first direction 1 are increased, The area of the cut surface C5 of the triangle formed on the work 10 is increased so that the vertical direction of the remaining portion d of the work 10 The thickness becomes smaller.

The movement of the first electrode guide 110 in the second direction 2 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the first direction 1 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

15, the reference point R1 is moved along the entry path P1 to the machining start point a, while maintaining the inclination of the wire electrode 150 as it is. The incidence path P1 of the workpiece 10 is processed while the one electrode guide 110 and the second electrode guide 120 are moved to form the inclined cut surface C6 at an angle within the workpiece. The inclined cut surface C6 is formed from the first point e1 portion to the machining start point a. When the reference point R1 is machined so as to move to the machining start point (a), as shown in FIG. 16 which is a sectional view of the workpiece 10 at the machining start point (a) .

16, the first electrode guide 110 is moved in the first direction 1 (a) in a state in which the reference point R1 is fixed at the processing start point (a) And the second electrode guide 120 is moved in the second direction 2 so that the wire electrode 150 is placed in a vertical direction. In FIG. 13, if the wire electrode 150 placed in the vertical direction is processed while having a predetermined inclination with respect to the vertical direction, in the case of FIG. 17, the wire electrode 150 has a constant inclination with respect to the vertical direction In the vertical direction.

In this case, a cut surface C7 having the same shape as the cut surface C1 of the triangular shape formed in FIG. 13 is formed in the lower portion of the remaining portion d or inside the workpiece 10. FIG. As a result, the thickness in the vertical direction of the portion connecting the machining start point (a) to the machining end point (b) (remaining portion (d)) becomes small.

When the cutting surface C7 of the triangular shape is completed and the wire electrode 150 is placed in the vertical direction, the processing for the entry path P1 is completed.

The fourth method of machining the entry path P1 is the case where the tilting is performed when the reference point R1 is at a predetermined second point e2 on the entry path. This will be described with reference to FIGS. 18 to 20. FIG. FIGS. 18 to 20 show the positions of the first electrode guide, the second electrode guide, the wire electrode 150, and the cross-sectional view of the workpiece 10 in the course of processing the entry path P1. Wherein the second point e2 may refer to any point on the entry path P1 including the wire insertion hole h position and the machining start point a.

18, the reference point R1 is positioned at the wire insertion hole h in a state in which the wire electrode 150 is positioned in the vertical direction along the entry path P1, The workpiece 10 is processed while moving the first electrode guide 110 and the second electrode guide 120 to move to a predetermined second point e2 on the workpiece P1.

19, the first electrode guide 110 is moved in the second direction 2 while the reference point R1 is fixed at the second point e2, The electrode guide 120 is moved in the first direction 1. The movement distance of the second electrode guide 120 in the first direction 1 may vary depending on the thickness of the workpiece 10 and other processing conditions. The movement distance of the first electrode guide 110 in the second direction 2 increases corresponding to the movement distance of the second electrode guide 120 and the reference point Rl increases at the second point e2 The first electrode guide 110 moves in accordance with the moving distance of the second electrode guide 120 so that the wire electrode 150 is straight.

The wire electrode 150 is tilted at a predetermined angle with respect to the vertical direction in a straight line state to perform a tilting process so that a triangular cut surface C8 is formed inside the workpiece 10 . In this case, a cut surface C8 having a right triangular shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the second direction 2 and the movement distance of the second electrode guide 120 in the first direction 1 are increased, The area of the triangular cut surface C8 formed in the work 10 is increased and the vertical direction of the remaining portion d of the work 10 is increased, The thickness becomes smaller.

The movement of the first electrode guide 110 in the second direction 2 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the first direction 1 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

20, the first electrode guide 110 is moved in the first direction 1 while the reference point R1 is fixed at the second point e2, The second electrode guide 120 is moved in the second direction 2 so that the wire electrode 150 is placed in a vertical direction. At this time, since the wire electrode 150 is returned to the vertical direction through the portion where the warp machining is already performed, no additional machining is performed.

18, the reference point R1 is moved along the entry path P1 at the second point e2 in a state in which the wire electrode 150 is vertically laid. The workpiece 10 is processed while moving the first electrode guide 110 and the second electrode guide 120 to move to the machining start point a.

When the reference point R1 is moved to the machining start point (a), machining for the entry path (P1) is completed.

When machining of the entry path P2 is completed in any one of the above-described four methods (S112), machining on the machining path is started (S114).

The processing for the processing path P2 follows a general processing method well known to those of ordinary skill in the art.

That is, the workpiece 10 is machined along the machining path from the machining start point (a) to the machining end point (b) with the wire electrode 150 lying in the vertical direction, thereby completing machining on the machining path .

When the machining to the machining end point b is completed, only the upper side residual portion 200a of the triangular shape remains in the remaining portion d as shown in Fig. 21, so that the thickness of the workpiece 10 becomes thick The scrap S can be easily removed manually. The size of the upper side residual portion 200a of the inverted triangular shape may vary depending on the inclined processing position of the entry path and the inclination angle of the inclined processing.

In addition, since the size of the triangular upper side residual portion 200a can be adjusted by adjusting the inclination degree of the wire electrode at the time of the slanting, if the slanting process is performed corresponding to the thickness of the workpiece 10, It is possible to easily remove the scrap S by hand without the secondary discharge machining.

In order to further shorten the vertical length of the upper side residual portion 200a of the triangular shape or to facilitate the removal, additional tilting can be performed when the reference point R1 is at the machining end point b. The states of completion of the machining of the entry path P1 and the machining path P2 are not separately shown in the drawing for the sake of understanding of the further inclined machining.

The first electrode guide 110 is moved in the first direction 1 or the fourth direction 4 while the reference point R1 is fixed to the machining end point b as shown in FIG. It is possible to move the second electrode guide 120 in the second direction 2 or the third direction 3 while performing the tilting process described above. The slanting process is the same except that the slanting process on the entry path P1 and the moving direction of the first electrode guide 110 and the second electrode guide 120 are reversed.

By performing the slanting process, a triangular cut surface C9 may be additionally formed in the workpiece 10 corresponding to the remaining portion d.

In this case, as shown in Fig. 23, the remaining portion d is left only in the upper side residual portion 200b in the shape of a triangle, and the thickness of the residual portion (d) It is possible to easily remove the scraps S manually even if the thickness of the workpiece 10 is thick. The slope machining performed at the machining end point (b) is more effective when the slant machining is performed at the machining starting point (a), but even if the slant machining is performed at another point on the entry path (P1) The same effect can be obtained in that the removal of the portion (d) can be easily performed.

On the other hand, the fact that the safety path P3 can be set based on the machining conditions has already been described. Hereinafter, the case where the safety path P2 is set and stored will be further described.

Processing for the safety path P3 is started after machining of the machining path P2 up to the machining end point b is completed or after additional machining is completed at the machining end point b.

The processing for the safety path P3 is performed in order to facilitate the removal of the residual portion d. In this case, as in the case of the processing path P1, the wire electrode 150 is moved in the vertical direction There may be a method of processing the workpiece 10 along the safety path P3 at the machining end point b to complete the machining.

Alternatively, in the present invention, the thickness of the residual portion (d) may be made smaller than that in the case of Fig. 21 so that the residual portion (d) has a triangular shape (200b) , It is possible to perform additional tilting during the machining of the safety path P3 as well as the tilting operation on the entry path P1. This slope machining is referred to as an additional slope machining in order to distinguish it from the slope machining on the entry path P1.

The wire electrode 150 is tilted by a predetermined angle at least at any one point on the safety path P3 so that a triangular-shaped cross-section is formed inside the remaining portion (d) (C) is additionally formed. Here, the safety path P3 may include the machining end point (b) position.

The additional tilting may be performed when the reference point Rl is at the machining end point b and the reference point Rl is located in the middle of the safety path P3, And is at any point on the safety path P3 between the end point f of the safety path P3.

The method of machining the safety path P3 in which the further gradient machining is performed may be the same as the machining method of the entry path P1. Each of the four processing methods of the safety path P3 described later can be selected in association with the four types of processing methods of the above-described entry path P1. For example, if the first method of machining the entry path P1 is selected at the machining of the entry path P1, the first method to be described later is also selected as the machining method at the time of machining the safety path P3 . Alternatively, the processing methods can be selected and processed independently of each other.

For the convenience of understanding, the drawings shown for the explanation of the further inclining processing are such that the cut surface formed by the inclining machining on the entry path P1 or the machining portion of the machining path P2 is not displayed.

The first method of machining the safety path P3 is when the additional tilting is performed when the reference point R1 is at the machining end point b. This will be described with reference to FIG. 24 is a sectional view of the first electrode guide, the second electrode guide, the position of the wire electrode 150, and the workpiece in the process of manufacturing the safety path P3.

24, when the reference point R1 is at the machining end point b and the reference point R1 is at the machining end point b in a state in which the wire electrode 150 is positioned in the vertical direction, The first electrode guide 110 is moved in the fourth direction 4 and the second electrode guide 120 is moved in the third direction 3. [ The movement distance of the second electrode guide 120 in the fourth direction 4 may vary depending on the thickness of the workpiece 10 and other processing conditions. The moving distance of the first electrode guide 110 in the fourth direction 4 increases corresponding to the moving distance of the second electrode guide 120 in the third direction 3, The first electrode guide 110 is moved in correspondence to the movement distance of the second electrode guide 120 so that the wire electrode 150 is straightened in a state where the wire electrode 150 is fixed at the machining end point b .

The wire electrode 150 is inclined at an angle with respect to the vertical direction in a straight line state to perform the further tilting process so that a triangular cut surface C21 is formed inside the workpiece 10 do. In this case, a cut surface C21 of a right triangle shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the fourth direction 4 and the movement distance of the second electrode guide 120 in the third direction 3 are increased, The area of the cut surface C21 of the triangle formed on the work 10 is increased and the vertical direction of the remaining portion d of the work 10 is increased, The thickness becomes smaller.

The movement of the first electrode guide 110 in the fourth direction 4 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the third direction 3 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

7, the reference point Rl is moved along the safety path P3 to the end point f of the safety path in a state in which the inclination of the wire electrode 150 is maintained as it is. The safety path P3 of the workpiece 10 is processed while moving the first electrode guide 110 and the second electrode guide 120 so as to move the workpiece 10 to a predetermined angle Thereby forming a cut surface.

The first electrode guide 110 may be moved to the third position in a state where the processing for the safety path P3 is finished or additionally the reference point R1 is fixed at the end point f of the safety path, After the process of moving the second electrode guide 120 in the fourth direction 3 and moving the wire electrode 150 in the vertical direction is performed, The processing for the safety path P3 may be terminated.

The second method of machining the safety path P3 is the case in which further tilting is performed when the reference point R1 is at the end point f of the safety path. This will be described with reference to FIG. 25 shows the positions of the first electrode guide, the second electrode guide, the wire electrode 150, and the cross-sectional view of the workpiece in the process of manufacturing the safety path P3.

The reference point R1 is moved from the machining end point b to the end point f of the safety path P3 along the safety path P3 with the wire electrode 150 lying in the vertical direction The workpiece 10 is processed while the first electrode guide 110 and the second electrode guide 120 are moved.

The first electrode guide 110 is moved in the fourth direction 4 while the reference point R1 is fixed at the end point f of the safety path P3, And moves the second electrode guide 120 in the third direction (3). The movement distance of the second electrode guide 120 in the third direction 3 may vary depending on the thickness of the workpiece 10 and other processing conditions. The movement distance of the first electrode guide 110 in the fourth direction 4 increases in accordance with the movement distance of the second electrode guide 120 and the reference point Rl is increased in the safety path P3, The first electrode guide 110 is moved in accordance with the moving distance of the second electrode guide 120 so that the wire electrode 150 is straightened while being fixed at the end point f of the first electrode guide 120. [

The wire electrode 150 is inclined at an angle with respect to the vertical direction in a straight line state to perform the further tilting process so that a triangular cut surface C22 is formed inside the workpiece 10 do. In this case, a cut surface C22 having a right triangular shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the fourth direction 4 and the movement distance of the second electrode guide 120 in the third direction 3 are increased, The angle of inclination with respect to the vertical direction becomes large so that the area of the cut surface 22 of the triangular shape formed in the workpiece 10 becomes large and the vertical direction of the remaining portion d of the workpiece 10 The thickness becomes smaller.

The movement of the first electrode guide 110 in the fourth direction 4 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the third direction 3 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

The first electrode guide 110 may be moved to the third position in a state where the processing for the safety path P3 is finished or additionally the reference point R1 is fixed at the end point f of the safety path, And the second electrode guide 120 is moved in the fourth direction 3 so that the wire electrode 150 is positioned in the vertical direction, P3 can be terminated.

The third method of machining the safety path P3 is the same as the first method in which the additional tilting is performed when the reference point R1 is at the machining end point b. The difference from the first method is that the process of forming the oblique cut surface extends from the machining end point b to the end point f of the safety path in the case of the first method, But only from the end point b to the third point e3 on the safety path. This will be described with reference to FIG. 26 is a sectional view of the first electrode guide, the second electrode guide, the position of the wire electrode 150, and the workpiece in the process of manufacturing the safety path P3.

24, the wire electrode 150 is inclined at a predetermined angle with respect to the vertical direction in a straight line, and the additional tilting is performed, so that a triangle A cut surface C21 of a shape is formed. In this case, a cut surface C21 of a right triangle shape is formed.

7, the reference point Rl is moved along the safety path P3 in a state where the inclination of the wire electrode 150 is maintained as it is, The safety path P3 of the workpiece 10 is processed while moving the first electrode guide 110 and the second electrode guide 120 to move to the predetermined third point e3, Thereby forming an inclined cut surface at an angle. When the reference point R1 is processed to move to the third point e3, as shown in FIG. 26, which is a sectional view of the workpiece 10 at the third point e3, one inclined hole is formed As shown in FIG.

Thereafter, the processing for the safety path P3 can be ended or further processed. The first electrode guide 110 is moved in the third direction 3 while the reference point R1 is fixed at the third point e3, The wire electrode 150 is moved in the fourth direction 4 so that the wire electrode 150 is placed in the vertical direction. The reference point R1 is moved from the third point e3 to the end point f of the safety path P3 along the safety path P3 with the wire electrode 150 lying in the vertical direction, The machining of the workpiece 10 is performed while moving the first electrode guide 110 and the second electrode guide to complete the machining operation on the safety path P3.

The fourth method of machining the safety path P3 is a case where the tilting is performed when the reference point R1 is at a predetermined fourth point e4 on the safety path P3. The fourth point e4 may refer to any point on the safety path P3 including the position of the machining end point b and the end point f of the safety path. This will be described with reference to FIG. 27 is a sectional view of the first electrode guide, the second electrode guide, the position of the wire electrode 150, and the workpiece in the process of manufacturing the safety path P3.

The reference point R1 is moved from the machining end point b to the fourth point e4 along the safety path P3 with the wire electrode 150 lying in the vertical direction, The workpiece 10 is processed while moving the first electrode guide 110 and the second electrode guide 120.

Next, as shown in FIG. 27, the first electrode guide 110 is moved in the fourth direction 4 while the reference point Rl is fixed at the fourth point e4, And the electrode guide 120 is moved in the third direction (3). The movement distance of the second electrode guide 120 in the third direction 3 may vary depending on the thickness of the workpiece 10 and other processing conditions. The movement distance of the first electrode guide 110 in the fourth direction 4 increases in accordance with the movement distance of the second electrode guide 120 and the reference point Rl is increased in the safety path P3, The first electrode guide 110 is moved in accordance with the moving distance of the second electrode guide 120 so that the wire electrode 150 is straightened while being fixed at the end point f of the first electrode guide 120. [

The wire electrode 150 is inclined at an angle with respect to the vertical direction in a straight line state to perform the further tilting process so that a triangular cut surface C23 is formed inside the workpiece 10 do. In this case, a section C23 of a right triangle shape is formed.

The inclination angle of the wire electrode 150 with respect to the vertical direction may vary depending on the thickness of the workpiece 10 and other processing conditions. When the movement distance of the first electrode guide 110 in the fourth direction 4 and the movement distance of the second electrode guide 120 in the third direction 3 are increased, The angle of inclination with respect to the vertical direction becomes large so that the area of the cut surface 22 of the triangular shape formed in the workpiece 10 becomes large and the vertical direction of the remaining portion d of the workpiece 10 The thickness becomes smaller.

The movement of the first electrode guide 110 in the fourth direction 4 and the movement of the wire electrode 150 in accordance with the movement of the second electrode guide 120 in the third direction 3 may cause the scrap S) portion of the scrap (S), and if the workpiece is moved to the extent that the scrap (S) portion is removed, the workpiece after the completion of machining is damaged.

The first electrode guide 110 may be moved in the third direction (e4) in a state in which the processing for the safety path P3 is finished or, further, the reference point R1 is fixed at the fourth point e4, And moving the second electrode guide 120 in the fourth direction 3 to place the wire electrode 150 in a vertical direction while moving the wire electrode 150 to the wire electrode 150, The processing for the safety path P3 may be terminated after machining is performed to the end point f of the safety path in the state of lying in the vertical direction.

When machining of the safety path P3 is completed in any one of the four methods described above, machining of a desired shape is completed.

In the first embodiment of the present invention, it is assumed that the first electrode guide is an upper guide 110 positioned on the upper side of the wire electric discharge machine 100 and guiding the wire electrode 150, And a lower guide 120 which is positioned below the wire electric discharge machine 100 and guides the wire electrode 150. The reference point is defined by the upper surface of the workpiece 10, And a first reference point R 1 that indicates a point where the corresponding portion of the wire electrode 150 meets.

However, according to the second embodiment of the present invention, the first electrode guide described in the first embodiment of the present invention is positioned below the wire electric discharge machine 100, And the second electrode guide described in the first embodiment of the present invention may be referred to as a guide 120. The second electrode guide may be positioned above the wire electric discharge machine 100 to guide the wire electrode 150, The reference point described with reference to the first embodiment of the present invention may refer to a second reference point 120 indicating a point at which a lower portion of the workpiece 10 and a corresponding portion of the wire electrode 150 meet, (R2). ≪ / RTI >

In this case, all of the triangular-shaped cut surfaces formed through the tilting and the further tilting will have an inverted triangle shape, and the remaining portion (d) formed through the tilting will have an inverted triangular shape Only the lower side remaining portion 200c of the normal right triangle shape is left as shown in Fig. 28, and the remaining portion d formed through the tilting and the further tilting is the reverse of Fig. 23 As shown in Fig. 29, unlike the triangular shape, only the lower side residual portion 200d of the normal triangle or isosceles triangle shape is left.

The third embodiment of the present invention is a case where machining is performed based on the machining conditions (when the safety path is not set) described with reference to Fig. 4 (a), and unlike the first embodiment of the present invention The slanting process is not performed at the time of machining the entry path P1 and the slanting process is performed at the machining end point b. This will be described below.

In the third embodiment of the present invention, the first electrode guide refers to the upper guide 110 of the wire electric discharge machine 100, and the second electrode guide corresponds to the lower guide 120 of the wire electric discharge machine 100 ). ≪ / RTI > Also, the reference point may refer to a first reference point R1, which means a point where the upper surface of the workpiece 10 meets a corresponding portion of the wire electrode 150. [

First, in the state where the above-described machining conditions are set and stored, machining starts with the wire insertion hole h as a machining start point. Before or after the step of setting and storing the processing conditions, a machining preparation step may be required.

The machining preparation step may be performed such that the workpiece 10 is positioned between the first electrode guide 110 and the second electrode guide 120 and the wire electrode 150 is positioned on the workpiece 10 May be connected between the first electrode guide 110 and the second electrode guide 120 while passing through the wire insertion hole h, thereby preparing the process.

Next, the wire electrode 150 is guided using the first electrode guide 110 and the second electrode guide 120 to start the wire insertion hole h as a machining start point. The wire electrode 150 is guided through the first electrode guide 110 and the second electrode guide 120 so that the reference point R1 moves along the entry path P1 to process the entry path P1 .

The processing of the entry path P1 follows a general processing method well known to those of ordinary skill in the art. The first electrode guide 110 and the second electrode 110 are moved such that the reference point R1 moves to the processing start point a along the entry path P1 in a state in which the wire electrode 150 is positioned in the vertical direction, The wire electrode 150 is guided through the guide 120 and processed. When machining on the entry path P1 is completed, machining on the machining path P2 is performed. Processing for the processing path P2 also follows a general processing method well known to those of ordinary skill in the art.

That is, the workpiece 10 is machined along the machining path P2 from the machining start point a to the machining end point b with the wire electrode 150 lying in the vertical direction, Thereby completing the machining operation.

Then, the slant machining is performed at the machining end point (b).

In other words, the slanting process is performed in the same manner as described with reference to FIG. The first electrode guide 110 is moved in the first direction 1 or the fourth direction 4 while the reference point R1 is fixed at the machining end point b, 120 can be moved in the second direction (2) or the third direction (3) while performing the above-described tilting.

By performing the slanting process, a triangular cut surface C9 can be formed in the work 10 corresponding to the remaining portion d.

In this case, as shown in FIG. 30, only the upper side residual portion 200e having an inverted triangular shape is left in the remaining portion (d), so that even if the thickness of the work 10 is thick, the scrap S is easily removed manually .

In the case of the third embodiment of the present invention, it is assumed that the first electrode guide is an upper guide 110 positioned on the upper side of the wire electric discharge machine 100 and guiding the wire electrode 150, And a lower guide 120 which is positioned below the wire electric discharge machine 100 and guides the wire electrode 150. The reference point is defined by the upper surface of the workpiece 10, And a first reference point R 1 that indicates a point where the corresponding portion of the wire electrode 150 meets.

However, according to the fourth embodiment of the present invention, the first electrode guide described in the third embodiment of the present invention is positioned below the wire electric discharge machine 100, The second electrode guide described above with reference to the third embodiment of the present invention may be referred to as a guide 120. The upper electrode guide may be positioned above the wire electric discharge machine 100, The reference point described with reference to the third embodiment of the present invention may refer to a second reference point 120 which means a point at which a lower portion of the workpiece 10 and a corresponding portion of the wire electrode 150 meet, (R2). ≪ / RTI >

In this case, the cut surface of the triangular shape formed through the tilting will have an inverted triangular shape, and the remaining portion d formed through the tilting is different from the inverted triangular shape of Fig. 30 As shown in the figure, only the lower side residual portion 200f in the shape of a right-angled triangle remains.

The fifth embodiment of the present invention is similar to the first embodiment of the present invention except that the machining is performed based on the machining conditions described with reference to FIG. 4 (b), that is, The slope machining is not performed at the time of machining the entry path P1 but the slope machining is performed at the safety path. That is, the additional bevel machining performed on the safety path P3 described through the first embodiment of the present invention is performed by the bevel machining in the fifth embodiment of the present invention. This will be described below.

In the fifth embodiment of the present invention, the first electrode guide refers to the upper guide 110 of the wire electric discharge machine 100, and the second electrode guide corresponds to the lower guide 120 of the wire electric discharge machine 100 ). ≪ / RTI > Also, the reference point may refer to a first reference point R1, which means a point where the upper surface of the workpiece 10 meets a corresponding portion of the wire electrode 150. [

First, in the state where the above-described machining conditions are set and stored, machining starts with the wire insertion hole h as a machining start point. Before or after the step of setting and storing the processing conditions, a machining preparation step may be required.

The machining preparation step may be performed such that the workpiece 10 is positioned between the first electrode guide 110 and the second electrode guide 120 and the wire electrode 150 is positioned on the workpiece 10 May be connected between the first electrode guide 110 and the second electrode guide 120 while passing through the wire insertion hole h, thereby preparing the process.

Next, the wire electrode 150 is guided using the first electrode guide 110 and the second electrode guide 120 to start the wire insertion hole h as a machining start point. The wire electrode 150 is guided through the first electrode guide 110 and the second electrode guide 120 so that the reference point R1 moves along the entry path P1 to process the entry path P1 .

The processing of the entry path P1 follows a general processing method well known to those of ordinary skill in the art. The first electrode guide 110 and the second electrode 110 are moved such that the reference point R1 moves to the processing start point a along the entry path P1 in a state in which the wire electrode 150 is positioned in the vertical direction, The wire electrode 150 is guided through the guide 120 and processed. When machining on the entry path P1 is completed, machining on the machining path P2 is performed. Processing for the processing path P2 also follows a general processing method well known to those of ordinary skill in the art.

That is, the workpiece 10 is machined along the machining path P2 from the machining start point a to the machining end point b with the wire electrode 150 lying in the vertical direction, Thereby completing the machining operation.

After the machining path machining to the machining end point b is completed or after the bevel machining at the machining end point b is completed as in the third embodiment of the present invention, Lt; / RTI >

Since the machining for the safety path P3 is not performed on the entry path P1, the tilting is performed during the machining of the safety path P3.

The wire electrode 150 is inclined at a predetermined angle at least at any one point on the safety path P3 so that a triangular shaped cut surface ( C) is additionally formed. Here, the safety path P3 may include the machining end point (b) position.

The inclination may be performed when the reference point R1 is at the machining end point b and when the reference point R1 is in the middle of the safety path P3, And is at any point on the safety path P3 between the end point f of the path P3.

The four machining methods of the safety path P3 in which the slant machining is performed are the same as the machining method for the additional slant machining described in the first embodiment of the present invention.

In summary, the first method of machining the safety path P3 is when the tilting is performed when the reference point R1 is at the machining end point b.

The second method of machining the safety path P3 is the case where the tilting is performed when the reference point R1 is at the end point f of the safety path.

The third method of machining the safety path P3 is the same as the first method in which the tilting is performed when the reference point R1 is at the machining end point b. The difference from the first method is that the process of forming the oblique cut surface extends from the machining end point b to the end point f of the safety path in the case of the first method, But only from the end point b to the third point e3 on the safety path.

The fourth method of machining the safety path P3 is a case where the tilting is performed when the reference point R1 is at a predetermined fourth point e4 on the safety path P3.

When machining of the safety path P3 is completed in any one of the four methods described above, machining of a desired shape is completed.

In the fifth embodiment of the present invention, it is assumed that the first electrode guide is an upper guide 110 located at the upper side of the wire electric discharge machine 100 and guiding the wire electrode 150, And a lower guide 120 which is positioned below the wire electric discharge machine 100 and guides the wire electrode 150. The reference point is defined by the upper surface of the workpiece 10, And a first reference point R 1 that indicates a point where the corresponding portion of the wire electrode 150 meets.

However, according to the sixth embodiment of the present invention, the first electrode guide described in the fifth embodiment of the present invention is positioned below the wire electric discharge machine 100, And the second electrode guide described in the fifth embodiment of the present invention may be an upper guide which is positioned on the upper side of the wire electric discharge machine 100 and guides the wire electrode 150, The reference point described with reference to the fifth embodiment of the present invention may refer to a second reference point 120 indicating a point at which a lower portion of the workpiece 10 and a corresponding portion of the wire electrode 150 meet, (R2). ≪ / RTI >

In this case, the cut surface of the triangular shape formed through the tilting will have an inverted triangle shape, and the remaining portion d formed through the tilting is different from the inverted triangle shape of the fifth embodiment of the present invention , Only the lower side residual portion of the normal right triangle shape is left.

As described above, according to the embodiments of the present invention, it is possible to reduce the thickness of the remaining portion through the tilting process at the time of processing using the wire electric discharge machine 100, It is possible to reduce the cost and the processing time.

The foregoing description of the embodiments is merely illustrative of the present invention with reference to the drawings for a more thorough understanding of the present invention, and thus should not be construed as limiting the present invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the basic principles of the present invention.

110: upper guide 120: lower guide
150: wire electrode 10: workpiece

Claims (21)

A machining method using a CNC wire-cutting electric discharge machine for machining a workpiece having a predetermined thickness lying between a first electrode guide and a second electrode guide using wire electrodes connected to a first electrode guide and a second electrode guide,
A wire insertion hole formed in the scrap, an entry path extending from the wire insertion hole to a machining start point on the machining path, a machining path starting from the entry path or the machining start point A first step in which a machining condition including a machining end point spaced by a predetermined residual portion is set and stored;
The wire electrode is guided through the first electrode guide and the second electrode guide so that the reference point moves along the entry path when the point where the workpiece surface and the wire electrode meet is defined as a reference point, A second step of forming a triangular cut surface inside the remaining portion by performing a tilting process to tilt the wire electrode at a predetermined angle at least at any point on the entry path;
And a third step of machining the workpiece along a machining path from the machining start point to the machining end point while the wire electrode is positioned in the vertical direction. The method according to claim 1, further comprising, before or between the first step and the second step,
The workpiece is positioned between the first electrode guide and the second electrode guide, and the wire electrode is connected to the first electrode guide and the second electrode guide through the wire insertion hole formed in the workpiece, Wherein the CNC wire-cutting electric discharge machining apparatus further comprises a step of preparing the CNC wire-cutting electric discharge machine. The method according to claim 1,
When defining a direction toward the processing end point on the entry path or a direction perpendicular to the entry path as a first direction and a direction opposite to the first direction as a second direction,
The second step comprises:
The first electrode guide is moved in the second direction while the reference point is fixed to the wire insertion hole position and the second electrode guide is moved in the first direction to perform the tilting process, Forming a cut surface of a triangular shape;
The workpiece is processed while moving the first electrode guide and the second electrode guide so that the reference point moves along the entry path to the machining start point while the inclination of the wire electrode is maintained, Forming an angled incline cut surface;
By moving the first electrode guide in the first direction and moving the second electrode guide in the second direction while the reference point is fixed at the machining start point, So that the CNC wire-cutting electric discharge machining method can be used. The method according to claim 1,
When defining a direction toward the processing end point on the entry path or a direction perpendicular to the entry path as a first direction and a direction opposite to the first direction as a second direction,
The second step comprises:
The first electrode guide and the second electrode guide are moved so that the reference point moves from the wire insertion hole position to the machining start point along the entry path while the wire electrode is positioned in the vertical direction, ; ≪ / RTI >
The first electrode guide is moved in the second direction and the second electrode guide is moved in the first direction while the reference point is fixed at the machining start point, Forming a cut surface of a triangular shape on the surface;
The first electrode guide is moved in the first direction and the second electrode guide is moved in the second direction in a state where the reference point is fixed at the machining start point position so that the wire electrode is placed in the vertical direction Wherein the CNC wire-cutting electric discharge machining apparatus is a CNC wire cutting electric discharge machining apparatus. The method according to claim 1,
When defining a direction toward the processing end point on the entry path or a direction perpendicular to the entry path as a first direction and a direction opposite to the first direction as a second direction,
The second step comprises:
The first electrode guide and the second electrode guide are moved such that the reference point moves from the wire insertion hole position to a predetermined first point on the entry path while the wire electrode is in the vertical direction, ≪ / RTI >
By moving the first electrode guide in the second direction while moving the second electrode guide in the first direction while the reference point is fixed to the first point position, Forming a triangular shaped cut surface in the inside;
The workpiece is processed while moving the first electrode guide and the second electrode guide so that the reference point moves along the entry path to the machining start point while the inclination of the wire electrode is maintained, Forming an angled incline cut surface;
By moving the first electrode guide in the first direction and moving the second electrode guide in the second direction while the reference point is fixed at the machining start point, So that the CNC wire-cutting electric discharge machining method can be used. The method according to claim 1,
When defining a direction toward the processing end point on the entry path or a direction perpendicular to the entry path as a first direction and a direction opposite to the first direction as a second direction,
The second step comprises:
While moving the first electrode guide and the second electrode guide so that the reference point moves from the wire insertion hole position to a predetermined second point on the entry path while the wire electrode is in a vertical direction, ≪ / RTI >
By moving the first electrode guide in the second direction while moving the second electrode guide in the first direction while the reference point is fixed to the second point position, Forming a triangular shaped cut surface in the inside;
The first electrode guide is moved in the first direction and the second electrode guide is moved in the second direction while the reference point is fixed at the second point position so that the wire electrode is placed in the vertical direction ;
And performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the second point position to the machining start point along the entry path Processing method using CNC wire cutting electric discharge machine. The method according to any one of claims 3 to 6,
After the third step,
The first electrode guide is moved in the first direction while the reference point is fixed to the machining end point position and the second electrode guide is moved in the second direction to perform the tilting, Further comprising the step of forming a triangular cutting surface inside the workpiece. The CNC wire-cutting electric discharge machine according to claim 1, The method according to any one of claims 3 to 6,
In the first step, a safety path spaced apart from the entry path at a predetermined distance and formed inside the scrap at the machining end point is additionally set and stored as the machining condition,
After the third step,
Further comprising the step of forming a triangular cut surface inside the remaining portion by performing a tilting process for tilting the wire electrode at a predetermined angle at least at any one point on the safety path CNC wire cutting electric discharge machine. The method according to any one of claims 3 to 6,
The reference point means a first reference point at which the upper surface of the workpiece meets the wire electrode,
Wherein the first electrode guide is an upper guide positioned on the upper side of the CNC wire cutting electric discharge machine to guide the wire electrode and the second electrode guide is positioned below the CNC wire cutting electric discharge machine to guide the wire electrode Wherein the lower guide is a CNC wire cutting electric discharge machine. The method according to any one of claims 3 to 6,
The reference point means a second reference point at which the lower surface of the workpiece meets the wire electrode,
The first electrode guide is a lower guide positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode, and the second electrode guide is positioned above the CNC wire-cutting electric discharge machine to guide the wire electrode Wherein the upper guide is an upper guide. delete delete delete A machining method using a CNC wire-cutting electric discharge machine for machining a workpiece having a predetermined thickness lying between a first electrode guide and a second electrode guide using wire electrodes connected to a first electrode guide and a second electrode guide,
A wire insertion hole formed in the scrap, an entry path extending from the wire insertion hole to a machining start point on the machining path, a machining path starting from the entry path or the machining start point A first step of setting and storing machining conditions including a machining end point spaced by a predetermined residual portion, a safety path spaced apart from the entry path, and formed inside the scrap at the machining end point;
Wherein the first electrode and the second electrode are arranged such that when the wire electrode is in a vertical direction, the reference point is moved to the machining end point along the entry path and the machining path when a point at which the workpiece surface and the wire electrode meet is defined as a reference point, A second step of processing the workpiece by guiding the wire electrode through a guide and a second electrode guide;
The wire electrode is guided through the first electrode guide and the second electrode guide so that the reference point moves along the safety path, and the safety path is machined, and at least at any one point on the safety path, And a third step of forming a triangular cut surface inside the remaining portion by performing a tilting process to be performed while being inclined at a predetermined angle. 15. The method of claim 14, further comprising: between the first step and the second step.
The workpiece is positioned between the first electrode guide and the second electrode guide, and the wire electrode is connected to the first electrode guide and the second electrode guide through the wire insertion hole formed in the workpiece, Wherein the CNC wire-cutting electric discharge machining apparatus further comprises a step of preparing the CNC wire-cutting electric discharge machine. 15. The method of claim 14,
When a direction toward the entry path on the safety path is defined as a third direction and a direction opposite to the third direction is defined as a fourth direction,
In the third step,
The first electrode guide is moved in the fourth direction while the reference point is fixed to the machining end point position and the second electrode guide is moved in the third direction so that the inclined machining is performed, Forming a cut surface of the shape;
The first electrode guide and the second electrode guide are moved while the inclination of the wire electrode is maintained so that the reference point moves along the safety path to the end point of the safety path, And forming a slant cut surface at a predetermined angle in the CNC wire cutting electric discharge machine. 15. The method of claim 14,
When a direction toward the entry path on the safety path is defined as a third direction and a direction opposite to the third direction is defined as a fourth direction,
In the third step,
While moving the first electrode guide and the second electrode guide so that the reference point moves from the machining end point position to the end point of the safety path along the safety path with the wire electrode lying in the vertical direction, ≪ / RTI >
The first electrode guide is moved in the fourth direction and the second electrode guide is moved in the third direction while the reference point is fixed at the end point of the safety path, And forming a cut surface of a triangular shape in the inside of the workpiece. 15. The method of claim 14,
When a direction toward the entry path on the safety path is defined as a third direction and a direction opposite to the third direction is defined as a fourth direction,
In the third step,
The first electrode guide is moved in the fourth direction while the reference point is fixed to the machining end point position and the second electrode guide is moved in the third direction so that the inclined machining is performed, Forming a cut surface of the shape;
The workpiece is processed while the first electrode guide and the second electrode guide are moved so that the reference point moves along the safety path to a predetermined third point on the safety path while the inclination of the wire electrode is maintained Forming an inclined cut surface at an angle within the workpiece;
The first electrode guide is moved in the third direction and the second electrode guide is moved in the fourth direction in a state in which the reference point is fixed at the third point position so that the wire electrode is placed in the vertical direction ;
And performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the third point position to the end point of the safety path along the safety path. CNC wire cutting electric discharge machine. 15. The method of claim 14,
When a direction toward the entry path on the safety path is defined as a third direction and a direction opposite to the third direction is defined as a fourth direction,
In the third step,
The workpiece machining is performed while moving the first electrode guide and the second electrode guide so that the reference point moves from the machining end point position to a predetermined fourth point on the safety path with the wire electrode lying in the vertical direction ; ≪ / RTI >
The first electrode guide is moved in the fourth direction while the second electrode guide is moved in the third direction while the reference point is fixed to the fourth point position, Forming a triangular shaped cut surface in the inside;
The first electrode guide is moved in the third direction and the second electrode guide is moved in the fourth direction while the reference point is fixed at the fourth point position so that the wire electrode is placed in the vertical direction ;
And performing the workpiece machining while moving the first electrode guide and the second electrode guide so that the reference point moves from the fourth point position to the end point of the safety path along the safety path. CNC wire cutting electric discharge machine. The method according to any one of claims 16 to 19,
The reference point means a first reference point at which the upper surface of the workpiece meets the wire electrode,
Wherein the first electrode guide is an upper guide positioned on the upper side of the CNC wire cutting electric discharge machine to guide the wire electrode and the second electrode guide is positioned below the CNC wire cutting electric discharge machine to guide the wire electrode Wherein the lower guide is a CNC wire cutting electric discharge machine. The method according to any one of claims 16 to 19,
The reference point means a second reference point at which the lower surface of the workpiece meets the wire electrode,
The first electrode guide is a lower guide positioned below the CNC wire-cutting electric discharge machine to guide the wire electrode, and the second electrode guide is positioned above the CNC wire-cutting electric discharge machine to guide the wire electrode Wherein the upper guide is an upper guide.

Images