JP2020172018A - Processing liquid discharge nozzle and wire electric discharge machine - Google Patents

Abstract

To provide a processing liquid discharge nozzle and a wire electric discharge machine which sufficiently supplies a processing liquid to a discharge gap, stabilizes a discharge phenomenon between a wire electrode and a workpiece, and can improve a processing speed.SOLUTION: A processing liquid discharge nozzle is applied to a wire electric discharge machine that applies electric-discharge machining to a workpiece by applying a voltage between a wire electrode and the workpiece, and has a discharge port 44 to which the wire electrode is inserted and discharges a processing liquid toward a gap between the wire electrode and the workpiece, in which the discharge port 44 of an upper nozzle 40 has a center part 45 to which the wire electrode is inserted and a plurality of groove parts 46 that are provided at spaces from one another in a circumferential direction with an axis line C as a center of the center part 45 in the inner peripheral surface of the center part 45 and extend to the outlet of the discharge port 44.SELECTED DRAWING: Figure 3

Description

The present invention relates to a machining fluid discharge nozzle and a wire electric discharge machine applied to a wire electric discharge machine that discharges a work by applying a voltage between a wire electrode and a work.

Conventionally, there is known a wire electric discharge machine that performs electric discharge machining of a work by applying a pulse voltage between the wire electrode and the work in a working liquid and controlling the relative position between the wire electrode and the work (). For example, see Patent Document 1).

The wire electric discharge machine is provided with a pair of nozzles facing each other across the workpiece. From each nozzle, the machining fluid is discharged toward the gap between the wire electrode and the work during electric discharge machining, that is, the so-called electric discharge gap. The machining fluid supplied to the discharge gap discharges machining debris generated during machining from the discharge gap, and cools the wire electrode and the work.

In such a wire electric discharge machine, their relative positions are controlled based on the voltage between the wire electrode and the workpiece so that an appropriate discharge gap is maintained.

International Publication No. 2013/54377

By the way, in such wire electric discharge machining, it is necessary to bring each nozzle close to the surface of the work in order to efficiently supply the machining liquid to the electric discharge gap. However, even if each nozzle is brought close to the surface of the work, most of the working liquid discharged from the nozzles flows along the surface of the work, so that there is a problem that the working liquid is not sufficiently supplied to the discharge gap. Therefore, the electric discharge phenomenon between the wire electrode and the work is difficult to stabilize, and there is room for improvement in improving the processing speed in wire electric discharge machining.

An object of the present invention is to provide a machining fluid discharge nozzle and a wire electric discharge machine capable of improving the machining speed.

The machining fluid discharge nozzle for achieving the above object is applied to a wire electric discharge machine that discharge-machines the work by applying a voltage between the wire electrode and the work, and the wire electrode is inserted and the work is inserted. It has a discharge port for discharging the machining fluid toward the gap between the wire electrode and the work, and the discharge port is the central portion through which the wire electrode is inserted and the inner peripheral surface of the central portion. It has a plurality of grooves that are provided at intervals in the circumferential direction about the axis of the central portion and extend to the outlet of the discharge port.

According to the same configuration, the working liquid is less likely to flow in each groove than in the center of the discharge port. Therefore, the machining fluid discharged from the discharge port is condensed toward the axis of the central portion and is reduced. As a result, the machining fluid easily flows along the wire electrode, so that the machining fluid is easily supplied to the gap between the wire electrode and the work during electric discharge machining, that is, the so-called electric discharge gap.

Therefore, the machining speed in wire electric discharge machining can be improved.

According to the present invention, the machining speed in wire electric discharge machining can be improved.

The schematic diagram which shows the structure of the wire electric discharge machine about 1st Embodiment of a wire electric discharge machine. The plan view which shows the discharge gap between the wire electrode of the same embodiment and a work. The upper nozzle of the same embodiment is shown, (a) is a perspective view of the upper nozzle, (b) is a sectional view taken along line 3b-3b of (a), and (c) is (b). ) A cross-sectional view taken along the line 3c-3c. It is a figure which shows the lower nozzle of the same embodiment, (a) is a perspective view of the lower nozzle, (b) is a sectional view along line 4b-4b of (a), (c) is (b). ) A cross-sectional view taken along the line 4c-4c. It is a figure explaining the operation of the wire electric discharge machine of the same embodiment, and is the sectional view of the work which shows the flow of the machining liquid in a discharge gap. It is a figure which shows the processing liquid discharge nozzle of the modified example, (a) is a plan view which looked at the upper nozzle from the protrusion side, (b) is a plan view which looked at the lower nozzle from the protrusion side. The upper nozzle of the second embodiment is shown, (a) is a perspective view of the upper nozzle, (b) is a sectional view taken along line 7b-7b of (a), and (c) is (c). A cross-sectional view taken along line 7c-7c of b). It is a figure which shows the lower nozzle of the same embodiment, (a) is a perspective view of the lower nozzle, (b) is a sectional view along line 8b-8b of (a), (c) is (b). ) A cross-sectional view taken along the line 8c-8c.

<First Embodiment>
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 5.
As shown in FIG. 2, the wire electric discharge machine of the present embodiment discharges the work 100 by applying a pulse voltage between the wire electrode 10 and the work 100. Hereinafter, the gap between the wire electrode 10 and the work 100 during electric discharge machining will be referred to as an electric discharge gap G.

As shown in FIG. 1, the wire electric discharge machine has a processing tank 20 in which a work 100 is arranged, and an upper guide 30 and a lower guide 50 that face each other vertically with the work 100 in between and support the wire electrodes 10, respectively. I have. The upper guide 30 is provided so as to be able to advance and retreat with respect to the lower guide 50.

The wire electric discharge machine of the present embodiment controls the relative positions of the wire electrode 10 and the work 100 so that the voltage between the wire electrode 10 and the work 100 in the discharge gap G becomes a predetermined voltage value. .. The relative position may be changed by moving the processing tank 20, or by moving the upper guide 30 and the lower guide 50 that support the wire electrode 10.

The wire electric discharge machine includes a bobbin (not shown) around which the wire electrode 10 is wound. The wire electrode 10 is fed from the bobbin to the upper guide 30 via a tension roller 70 that adjusts the tension of the wire electrode 10.

Inside the processing tank 20, a table 21 on which the work 100 is placed is provided. The table 21 includes a base portion 22 projecting from the bottom of the processing tank 20 and a surface plate 23 fixed on the base portion 22. The work 100 is placed on the surface plate 23.

The processing tank 20 at the time of processing the work 100 is filled with the processing liquid so that the entire work 100 is immersed. The processing liquid is circulated and supplied into the processing tank 20 through a filter for separating the processing waste of the work 100, an ion exchange resin (both not shown), and the like. The processing liquid in this embodiment is water.

The upper guide 30 includes an upper guide block 31 that supplies power to the wire electrode 10 and an upper nozzle 40 through which the wire electrode 10 is inserted and discharges machining liquid from above the work 100 toward the discharge gap G. An upper die 32 for supporting the wire electrode 10 by inserting the wire electrode 10 is provided in the lower portion of the upper guide block 31 (see FIG. 5). The upper die 32 is located in the inflow port 42 of the upper nozzle 40, which will be described later.

The lower guide 50 includes a lower guide block 51 that supplies power to the wire electrode 10, and a lower nozzle 60 through which the wire electrode 10 is inserted and a processing liquid is supplied from below the work 100 toward the discharge gap G. A lower die 52 that supports the wire electrode 10 by inserting the wire electrode 10 is provided above the lower guide block 51 (see FIG. 5). The lower die 52 is located in the inflow port 62 of the lower nozzle 60, which will be described later.

Here, in the present embodiment, the axis of the wire electrode 10, the axis of the upper nozzle 40, and the axis of the lower nozzle 60 are aligned between the upper guide 30 and the lower guide 50. Hereinafter, these axes will be referred to as axis C. Further, the circumferential direction centered on the axis C is simply referred to as the circumferential direction, and the radial direction centered on the axis C is simply referred to as the radial direction. In this embodiment, the axis C and the vertical direction coincide with each other.

Next, the upper nozzle 40 will be described in detail.
As shown in FIG. 3A, the upper nozzle 40 has a base 41 having an annular flange portion 41a and a protrusion 43 protruding from the base 41. The upper nozzle 40 is fixed by being pressed against the upper guide block 31 by an annular pressing member (not shown).

As shown in FIG. 3B, the base 41 of the upper nozzle 40 has an inflow port 42 into which the working liquid flows. The machining fluid flows into the inflow port 42 from the machining fluid supply device (not shown) via the upper guide block 31. The inflow port 42 has a circular cross-sectional shape orthogonal to the axis C, and its diameter is reduced toward the protrusion 43 side.

The protrusion 43 of the upper nozzle 40 has a discharge port 44 for discharging the machining fluid that has flowed into the inflow port 42 of the base 41. The discharge port 44 extends along the axis C.
As shown in FIG. 3C, a plurality of discharge ports 44 are provided at equal intervals in the circumferential direction of the central portion 45 through which the wire electrode 10 is inserted and the inner peripheral surface of the central portion 45. It has (eight in this embodiment) groove portions 46.

The central portion 45 is a columnar region whose cross-sectional shape orthogonal to the axis C is a virtual circle V centered on the axis C shown by the alternate long and short dash line in the figure.
Each groove 46 is provided along the axis C over the entire center 45. More specifically, each groove 46 extends from an intermediate portion of the upper nozzle 40 in the axial direction, that is, from a connection portion between the inflow port 42 and the discharge port 44 to the outlet of the discharge port 44. The width of each groove 46 in the circumferential direction is smaller toward the outside in the radial direction. The inflow port 42 and the discharge port 44 are smoothly connected to each other.

Next, the lower nozzle 60 will be described in detail.
As shown in FIG. 4A, the lower nozzle 60 has a base portion 61 having an annular flange portion 61a and a protrusion 63 protruding from the base portion 61. The lower nozzle 60 is fixed by being pressed against the lower guide block 51 by an annular pressing member (not shown).

As shown in FIG. 4B, the base 61 of the lower nozzle 60 has an inflow port 62 into which the working liquid flows. The machining fluid flows into the inflow port 62 from the machining fluid supply device (not shown) via the lower guide block 51. The inflow port 62 has a circular cross-sectional shape orthogonal to the axis C, and the diameter is reduced toward the protrusion 63 side.

The protrusion 63 of the lower nozzle 60 has a discharge port 64 for discharging the machining fluid that has flowed into the inflow port 62 of the base 61. The discharge port 64 extends along the axis C.
As shown in FIG. 4C, a plurality of discharge ports 64 are provided at equal intervals in the circumferential direction of the central portion 65 through which the wire electrode 10 is inserted and the inner peripheral surface of the central portion 65. It has (eight in this embodiment) groove portions 66.

The central portion 65 is a columnar region whose cross-sectional shape orthogonal to the axis C is a virtual circle V centered on the axis C shown by the alternate long and short dash line in the figure.
Each groove 66 is provided along the axis C over the entire center 65. More specifically, each groove 66 extends from an intermediate portion of the lower nozzle 60 in the axial direction, that is, from the connection portion between the inflow port 62 and the discharge port 64 to the outlet of the discharge port 64. The width of each groove 66 in the circumferential direction is smaller toward the outside in the radial direction. The inflow port 62 and the discharge port 64 are smoothly connected to each other.

The cross-sectional shape orthogonal to the axis C of the discharge port 44 of the upper nozzle 40 and the cross-sectional shape orthogonal to the axis C of the discharge port 64 of the lower nozzle 60 are the same. That is, in a cross section orthogonal to the axis C, the central portion 45 of the discharge port 44 and the central portion 65 of the discharge port 64 have the same cross-sectional shape, and the groove portion 46 of the discharge port 44 and the groove portion 66 of the discharge port 64. Has the same cross-sectional shape as.

The operation of this embodiment will be described.
The discharge ports 44 and 64 of the nozzles 40 and 60 have central portions 45 and 65 and a plurality of groove portions 46 and 66 provided on the inner peripheral surfaces of the central portions 45 and 65. Therefore, the machining fluid discharged from the discharge ports 44 and 64 is less likely to flow in the groove portions 46 and 66 than in the central portions 45 and 65. Therefore, the machining fluid discharged from the discharge ports 44 and 64 is condensed toward the axis C of the central portions 45 and 65 so as to be reduced. As a result, the machining fluid discharged from above and below the work 100 by the nozzles 40 and 60 can easily flow along the wire electrode 10, so that the machining fluid can be easily supplied to the discharge gap G (the above, action 1). ).

As shown in FIG. 5, the machining fluid discharged from above and below the work 100 by the nozzles 40 and 60 can easily flow along the wire electrode 10, so that the facing surface between the wire electrode 10 and the work 100, that is, The machining fluid is easily supplied to the entire machining surface of the work 100.

At this time, the machining fluid discharged from the upper nozzle 40 and the machining fluid discharged from the lower nozzle 60 collide with each other at the central portion in the thickness direction of the work 100. As shown by arrows in the figure, the machining fluids that collide with each other flow in the direction away from the machining surface. As a result, the discharge of the work waste of the work 100 is promoted (the above is the action 2).

The effect of this embodiment will be described.
(1) The discharge ports 44 and 64 of the nozzles 40 and 60 are located on the inner peripheral surfaces of the central portions 45 and 65 through which the wire electrodes 10 are inserted and the central portions 45 and 65 in the circumferential direction of the central portions 45 and 65. It is provided at intervals and has a plurality of grooves 46, 66 extending to the outlets of the discharge ports 44, 64.

According to such a configuration, since the above-mentioned action 1 is exhibited, the machining speed in wire electric discharge machining can be improved.
(2) The plurality of groove portions 46, 66 are provided at equal intervals in the circumferential direction.

According to such a configuration, the working liquid discharged from the discharge ports 44 and 64 is uniformly contracted toward the axis C of the central portions 45 and 65. As a result, the processing liquid easily flows along the wire electrode 10 over the entire circumference of the wire electrode 10. Therefore, the machining speed can be improved regardless of the direction of relative movement between the wire electrode 10 and the work 100.

(3) The width of each groove 46, 66 in the circumferential direction is smaller toward the outside in the radial direction.
According to such a configuration, since the width of each of the groove portions 46 and 66 in the circumferential direction is smaller toward the outer side in the radial direction, the working liquid passing through the groove portions 46 and 66 is less likely to flow toward the outer side in the radial direction. As a result, the machining fluid discharged from the discharge ports 44 and 64 is more likely to be aggregated toward the axis C of the central portions 45 and 65. Therefore, the processing liquid is easily supplied to the discharge gap G.

(4) The wire electric discharge machine includes an upper nozzle 40 and a lower nozzle 60 that supply machining liquid from above and below sandwiching the work 100 toward the discharge gap G, respectively.
According to such a configuration, since the above-mentioned action 2 is exhibited, the machining speed in wire electric discharge machining can be improved.

Further, according to the above configuration, the discharge phenomenon in the discharge gap G can be easily stabilized, and the machining accuracy of the wire electric discharge machine can be improved.
<Second Embodiment>
Hereinafter, the second embodiment will be described with reference to FIGS. 7 and 8.

In the present embodiment, the same reference numerals are given to the same configurations as those of the first embodiment, and "200" is added to the reference numerals "**" of the first embodiment for the configurations corresponding to the first embodiment. Add the added "2 **".

In the second embodiment, the shapes of the upper nozzle 240 and the lower nozzle 260 are different from those in the first embodiment. Therefore, the configurations of the upper nozzle 240 and the lower nozzle 260 will be described below.

First, the upper nozzle 240 will be described in detail.
As shown in FIG. 7A, the upper nozzle 240 has a base 41 having an annular flange portion 41a and a protrusion 43 protruding from the base 41. The upper nozzle 240 is fixed by being pressed against the upper guide block 31 by an annular pressing member (not shown).

As shown in FIG. 7B, the base 41 of the upper nozzle 240 has an inflow port 42 into which the working liquid flows. The machining fluid flows into the inflow port 42 from the machining fluid supply device (not shown) via the upper guide block 31. The inflow port 42 has a circular cross-sectional shape orthogonal to the axis C, and its diameter is reduced toward the protrusion 43 side.

The protrusion 43 of the upper nozzle 240 has a discharge port 244 for discharging the machining fluid that has flowed into the inflow port 42 of the base 41. The discharge port 244 extends along the axis C.
As shown in FIG. 7C, a plurality of discharge ports 244 are provided at equal intervals in the circumferential direction of the central portion 245 through which the wire electrode 10 is inserted and the inner peripheral surface of the central portion 245. It has (eight in this embodiment) groove portions 246. Further, the discharge ports 244 are provided outside the radial direction of the central portion 245 and between the groove portions 246 in the circumferential direction, and a plurality of (eight in the present embodiment) penetrating portions penetrating the central portion 245 in the axial direction. It has 247.

The central portion 245 is a columnar region whose cross-sectional shape orthogonal to the axis C is a virtual circle V1 centered on the axis C shown by the alternate long and short dash line in the figure.
Each groove 246 is provided along the axis C over the entire central portion 245. More specifically, each groove portion 246 extends from an intermediate portion of the upper nozzle 240 in the axial direction, that is, from a connecting portion between the inflow port 42 and the discharge port 244 to the outlet of the discharge port 244. The width of each groove 46 in the circumferential direction is smaller toward the outside in the radial direction. The inflow port 42 and the discharge port 244 are smoothly connected to each other.

Each penetrating portion 247 has a circular cross-sectional shape orthogonal to the axis C. The cross-sectional area of one penetrating portion 247 is smaller than the cross-sectional area of one groove portion 246.
Each penetration portion 247 penetrates the protrusion 43 in the axial direction and is connected to the inflow port 42. The axis of each penetrating portion 247 is located inside the virtual circle V2 connecting the outermost radial edges of each groove portion 246 in the radial direction. Therefore, although not shown, the diameter of the virtual circle connecting the axes of the penetrating portions 247 is larger than the diameter of the virtual circle V1 and smaller than the diameter of the virtual circle V2.

Next, the lower nozzle 260 will be described in detail.
As shown in FIG. 8A, the lower nozzle 260 has a base portion 61 having an annular flange portion 61a and a protrusion 63 protruding from the base portion 61. The lower nozzle 260 is fixed by being pressed against the lower guide block 51 by an annular pressing member (not shown).

As shown in FIG. 8B, the base 61 of the lower nozzle 260 has an inflow port 62 into which the working liquid flows. The machining fluid flows into the inflow port 62 from the machining fluid supply device (not shown) via the lower guide block 51. The inflow port 62 has a circular cross-sectional shape orthogonal to the axis C, and the diameter is reduced toward the protrusion 63 side.

The protrusion 63 of the lower nozzle 260 has a discharge port 264 for discharging the machining fluid that has flowed into the inflow port 62 of the base 61. The discharge port 264 extends along the axis C.
As shown in FIG. 8C, a plurality of discharge ports 264 are provided at equal intervals in the circumferential direction of the central portion 265 through which the wire electrode 10 is inserted and the inner peripheral surface of the central portion 265. It has (eight in this embodiment) groove portions 266. Further, the discharge port 264 is provided outside the radial direction of the central portion 265 and between the groove portions 266 in the circumferential direction, and a plurality of (eight in this embodiment) penetrating portions penetrating the central portion 265 in the axial direction. It has 267.

The central portion 265 is a columnar region whose cross-sectional shape orthogonal to the axis C is a virtual circle V1 centered on the axis C shown by the alternate long and short dash line in the figure.
Each groove 266 is provided along the axis C over the entire central portion 265. More specifically, each groove portion 266 extends from an intermediate portion of the lower nozzle 260 in the axial direction, that is, from a connecting portion between the inflow port 62 and the discharge port 264 to the outlet of the discharge port 264. The width of each groove 266 in the circumferential direction is smaller toward the outside in the radial direction. The inflow port 62 and the discharge port 264 are smoothly connected to each other.

Each penetrating portion 267 has a circular cross-sectional shape orthogonal to the axis C. The cross-sectional area of one penetrating portion 267 is smaller than the cross-sectional area of one groove portion 266.
Each penetration portion 267 penetrates the protrusion 63 in the axial direction and is connected to the inflow port 62. The axis of each penetrating portion 267 is located inside the virtual circle V2 connecting the outermost radial edges of each groove portion 266 in the radial direction. Therefore, although not shown, the diameter of the virtual circle connecting the axes of the penetrating portions 267 is larger than the diameter of the virtual circle V1 and smaller than the diameter of the virtual circle V2.

The cross-sectional shape orthogonal to the axis C of the discharge port 244 of the upper nozzle 240 is the same as the cross-sectional shape orthogonal to the axis C of the discharge port 264 of the lower nozzle 260. That is, in the cross section orthogonal to the axis C, the central portion 245 of the discharge port 244 and the central portion 265 of the discharge port 264 have the same cross-sectional shape, and the groove portion 246 of the discharge port 244 and the groove portion 266 of the discharge port 264. Has the same cross-sectional shape as. Further, in the cross section orthogonal to the axis C, the penetrating portion 247 of the discharge port 244 and the penetrating portion 267 of the discharge port 264 have the same cross-sectional shape.

The operation of this embodiment will be described.
The discharge ports 244 and 264 of the nozzles 240 and 260 have through portions 247 and 267. Therefore, the processing liquid flowing in from the inflow ports 42 and 62 is discharged from the central portions 245 and 265, the groove portions 246 and 266, and the penetrating portions 247 and 267. Here, the machining fluid discharged from each of the penetrating portions 247 and 267 makes it difficult for the machining fluid discharged from the central portions 245 and 265 and the groove portions 246 and 266 to diffuse outward in the radial direction. Therefore, the machining fluid discharged from the discharge ports 244 and 264 is condensed toward the axis C of the central portions 245 and 265 to be reduced. As a result, the machining fluid discharged from above and below the work 100 by the nozzles 240 and 260 can easily flow along the wire electrode 10, so that the machining fluid can be easily supplied to the discharge gap G (the above, the action 3). ).

The effect of this embodiment will be described.
According to the nozzles 240 and 260 of the present embodiment, in addition to the effects (1) to (4) of the first embodiment, the following effects can be newly obtained.

(5) Discharge ports 244 and 264 are provided between the groove portions 246 and 266 in the radial direction of the central portions 245 and 265 and in the circumferential direction, and the through portions 247 penetrate the central portions 245 and 265 in the axial direction. , 267.

According to such a configuration, since the above-mentioned action 3 is exhibited, the machining speed in wire electric discharge machining can be improved.
<Change example>
The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

-Only one of the upper nozzles 40 and 240 and the lower nozzles 60 and 260 may be the machining fluid discharge nozzle according to the present invention.
As shown in FIGS. 6A and 6B, instead of the groove portions 46 and 66, a discharge port 144 provided with a plurality of groove portions 146 and 166 having a constant width in the circumferential direction in the radial direction is provided. An upper nozzle 140 and a lower nozzle 160 having 164 can also be adopted. In this modified example, four groove portions 146 and 166 are provided at equal intervals in the circumferential direction.

In this modification, the same components as those in the first embodiment are designated by the same reference numerals, and the corresponding configurations are designated by adding "100" to the reference numerals "**" in the first embodiment. Duplicate explanations are omitted by adding them.

-The number and arrangement of the grooves 46, 66, 246, 266 can be changed as appropriate.
-The shapes of the central portions 45, 65, 245, 265 and the groove portions 46, 66, 246, 266 can be appropriately changed.

-In the above embodiment, it has been described that the axis of the wire electrode 10 between the upper guide 30 and the lower guide 50, the axis of the upper nozzles 40 and 240, and the axis of the lower nozzles 60 and 260 coincide with each other. The “match” in the embodiment includes not only the case where the match is exactly the same, but also the case where the “match” is approximately the same within the range in which the action and effect in the above-described embodiment are exhibited.

-The axis C may be inclined with respect to the vertical direction. That is, the present invention also applies to taper processing in which the wire electrode 10 is inclined with respect to the work 100 in a state where the axis of the wire electrode 10 and the axis of each nozzle 40, 60, 240, 260 are aligned. The processing liquid discharge nozzle according to the above can be applied.

-The present invention can also be applied to a wire electric discharge machine that uses a processing liquid containing oil as a main component.
The cross-sectional area of one penetrating portion 247,267 may be the same as the cross-sectional area of one groove portion 246,266, or may be larger than the cross-sectional area of one groove portion 246,266.

-The cross-sectional shape of the penetrating portions 247 and 267 does not have to be circular, and may be polygonal such as triangular or quadrangular.
-The positions of the penetrating portions 247 and 267 in the radial direction can be changed as appropriate. For example, the diameter of the virtual circle connecting the axes of the penetrating portions 247 and 267 may be larger than the diameter of the virtual circle V2.

-The number of penetrating portions 247 and 267 can be changed as appropriate.

10 ... Wire electrode, 20 ... Processing tank, 21 ... Table, 22 ... Base part, 23 ... Surface plate, 30 ... Upper guide, 31 ... Upper guide block, 32 ... Upper die, 40, 140, 240 ... Upper nozzle, 41 ... base, 41a ... flange, 42 ... inlet, 43 ... protrusion, 44,144,244 ... discharge port, 45,145,245 ... center, 46,146,246 ... groove, 50 ... lower guide, 51 ... Lower guide block, 52 ... Lower die, 60,160,260 ... Lower nozzle, 61 ... Base, 61a ... Flange, 62 ... Inlet, 63 ... Protrusion, 64,164,264 ... Discharge port, 65,165 , 265 ... Central part, 66,166,266 ... Groove part, 70 ... Tension roller, 100 ... Work, 247 ... Penetration part, 267 ... Penetration part.

Claims (6)

It is applied to a wire electric discharge machine that discharges the work by applying a voltage between the wire electrode and the work, and the wire electrode is inserted and the working liquid is directed toward the gap between the wire electrode and the work. A machining fluid discharge nozzle having a discharge port for discharging
The discharge port is
The central part through which the wire electrode is inserted and
It has a plurality of grooves which are provided on the inner peripheral surface of the central portion at intervals in the circumferential direction about the axis of the central portion and extend to the outlet of the discharge port.
Machining liquid discharge nozzle. The plurality of grooves are provided at equal intervals in the circumferential direction.
The machining fluid discharge nozzle according to claim 1. The width of each of the groove portions in the circumferential direction is smaller toward the outside in the radial direction centered on the axis.
The machining fluid discharge nozzle according to claim 1 or 2. When the radial direction centered on the axis is the radial direction,
The discharge port is provided outside the radial direction of the central portion and between the groove portions in the circumferential direction, and has a penetrating portion penetrating in the axial direction of the central portion.
The machining fluid discharge nozzle according to any one of claims 1 to 3. A wire electric discharge machine that discharges workpieces by applying a voltage to the wire electrodes.
A pair of nozzles for supplying a working liquid from one side and the other side of the work toward the gap between the wire electrode and the work are provided.
At least one of the pair of nozzles is the machining fluid discharge nozzle according to any one of claims 1 to 4.
Wire electric discharge machine. Both of the pair of nozzles are the machining fluid discharge nozzles.
The wire electric discharge machine according to claim 5.