CN204584482U - A kind of asymmetric degree of depth very low power electrode - Google Patents
A kind of asymmetric degree of depth very low power electrode Download PDFInfo
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- CN204584482U CN204584482U CN201520130919.2U CN201520130919U CN204584482U CN 204584482 U CN204584482 U CN 204584482U CN 201520130919 U CN201520130919 U CN 201520130919U CN 204584482 U CN204584482 U CN 204584482U
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- low power
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Abstract
The utility model discloses a kind of asymmetric degree of depth very low power electrode.This asymmetric degree of depth very low power electrode is at the whole very low power being circumferentially furnished with V-arrangement vertically of columniform electrode, the degree of depth of very low power is in deepening trend gradually up and down, be symmetrically from top to bottom the second very low power to the n-th very low power, the gash depth Changing Pattern of very low power is: h
n=h
(n 1)+ D/m, the center of electrode is provided with passage.During use, the negative pole of the Electrode connection pulse power, workpiece connects the positive pole of the pulse power, and the voltage of the pulse power is 20 ~ 300V, and electric current is 0.5 ~ 50A, pulse power frequency 20 ~ 1000Hz; Passage in electrode passes into air pulse, and frequency is identical with pulse power frequency.The electric discharge of the utility model asymmetric degree of depth very low power electrode makes microelectrode towards the skew of darker direction, the microflute face of cylinder, thus processes microbend hole.
Description
Technical field
The utility model relates to a kind of Machining technology for curved hole, particularly relates to a kind of asymmetric degree of depth very low power electrode, belongs to electric spark machining field.
Technical background
Spark erosion technique has simple to operate, and processing cost is low, and minimum process aperture can reach the advantage of several microns, so application is wider.But traditional spark erosion technique only can process straight hole, the curvature of space path capillary processing in high added value parts cannot be met.Curvature of space hole machined technology is the important technical problem of in manufacturing technology always, a lot of component of machine all needs the structure of bent hole, especially casting mould (particularly a multi-cavity mold) sinuate structure needs design cooling water channel hole to go for a stroll with mold cavity and cool, and improves castability; Because these cooling water channel holes bend in three dimensions, be difficult to process satisfactory curvature of space micropore by present manufacturing technology.Therefore in order to improve mechanical processing technique, general permission designs bent hole structure, but because the parts had must design bent hole structure to improve performance, therefore common practices adopts several sections of straight holes to fit to curve to replace bent hole now, but this method is difficult to the high production performance that meets the demands, sometimes also the serious phenomenon such as leakage can be there is and manufacturing cost is also high.Therefore in order to meet the demand of the curvature of space micropore that present industrial production manufactures, need a kind of simple to operate, production cost is low, and the curvature of space hole forming method that can popularize, improves the workmanship of parts.
In Bend Hole Machining, become present Bend Hole Machining common method because spark machined has the feature of defeating a force with a tenderness.The research of present application spark machined bent hole aspect mainly concentrates on Japan, but their great majority research is how to carry out Based Intelligent Control to electrode tip, makes electrode tip can carry out bending on request thus process bent hole.Due to the particularity of spark machined environment and the feature such as the size of sparking electrode is little, make the processing method cost being processed bending micropore by Based Intelligent Control electrode tip head high, equipment is complicated.
Utility model content
It is high that the purpose of this utility model is to overcome existing Bend Hole Machining cost, the shortcoming of equipment complexity, provides a kind of asymmetric degree of depth very low power electrode, can simply realize bending capillary processing.
The utility model realizes by following technical scheme:
A kind of asymmetric degree of depth very low power electrode, at the whole very low power being circumferentially furnished with V-arrangement vertically of columniform electrode, very low power is whole circumferentially symmetrical, be mal-distribution up and down, the degree of depth of very low power is in deepening trend gradually up and down, wherein topmost very low power is the degree of depth h of the first very low power, the first very low power
1the most shallow, be symmetrically from top to bottom the second very low power to the n-th very low power, the gash depth Changing Pattern of very low power is: h
n=h
(n ?1)+ D/m, wherein h
(n ?1)for electrode surface n ?the degree of depth of 1 article of very low power, h
nbe the degree of depth of n-th very low power, the external diameter of the span of n to be 1<n<30, D be electrode, m is an arithmetic number, and span is 50<m<80; The center of electrode is provided with passage, and the diameter of passage is 0.1 ~ 2.5 millimeter; The surface of described very low power scribbles insulating coating.
Preferably, the angle of the v-shaped structure two sides of described very low power is 45 ~ 60 degree.
The degree of depth h of described first very low power
1it is 0.01 millimeter.
The material of described electrode is red copper.
The degree of depth of described very low power is 10 ~ 300 microns.
The thickness of described insulating coating is 0.006 ~ 0.01 millimeter, and the material of insulating coating is aryl polyimides.
Very low power on electrode side owing to contributing to the discharge of gas, thus improves electric discharge working (machining) efficiency and can process the micro deep-hole of larger aspect ratio.Add man-hour carrying out micro discharge in gas, because the very low power of different depth is different on the impact of micro discharge, the large very low power of the degree of depth is owing to more contributing to exhaust and chip removal, this makes advantageously in generation spark discharge, material removal rate also significantly improves, thus it is different to make to remove speed at the local material of electrode different depth microflute; This asymmetric discharge removal efficiency makes microelectrode towards the skew of darker direction, the microflute face of cylinder, thus processes microbend hole.
The utility model compared with prior art tool has the following advantages:
(1) use asymmetric micro groove structure electrode to carry out the micro discharge processing of curved hole, do not need complicated mechanism and control module, only need to process in traditional electrode as groove, thus reduce processing cost;
(2) microflute on electrode side owing to contributing to exhaust and chip removal, thus improves material removal rate, thus cuts down finished cost, and can process the micro deep-hole of larger aspect ratio.
Accompanying drawing explanation
Fig. 1 is the machining sketch chart of asymmetric micro groove structure electrode of the present utility model.
Fig. 2 is the schematic three dimensional views of asymmetric very low power electrode.
Fig. 3 is the cross sectional representation of the asymmetric micro groove structure electrode of Fig. 2.
Fig. 4 is the machining sketch chart of electric discharge processing starting stage.
Fig. 5 is curved hole forming schematic diagram at the end of electric discharge.
Detailed description of the invention
For better understanding the utility model, below in conjunction with drawings and Examples, the utility model is described further, but the claimed scope of the utility model is not limited to the scope that embodiment represents.
Traditional electric discharging machining electrode is generally cylindrical, and the utility model is on electrode side, process asymmetric micro groove structure.As shown in Figure 1, when making asymmetric degree of depth micro groove structure electrode, be adopt the most advanced and sophisticated skive 1 of High Rotation Speed V-arrangement, straight reciprocating motion is done in the electric discharge side of electrode 2, and each feeding depth is 1 ~ 5 micron, processes the very low power 3 of V-arrangement gradually; The center of electrode 2 is provided with passage 5, and the diameter of passage 5 is 0.1 ~ 2.5 millimeter, by fixture 4 clamping and location in electrode 2 manufacturing process; Grinding wheel speed is 2000 ~ 3000 revs/min, and feed speed is 0.1 ~ 0.2 m/min, and cutting fluid is water.
Fig. 2 is the schematic three dimensional views of asymmetric degree of depth very low power electrode, as shown in Figure 2, the outer diameter D of electrode 2 controls: 0.3<D<3.0 millimeter, the surface of electrode 2 be furnished with very low power 3, very low power 3 forms micro-cannelure array, and the angle of very low power 3 two sides is 45 ~ 60 degree.The side surface of electrode 2 scribbles the insulating coating that thickness is 0.006 ~ 0.01 millimeter, its material is aryl polyimides, the object being coated with insulating coating prevents from electrode side from contacting with the hole wall that workpiece has processed to discharge, thus ensure that spark discharge occurs in electrode tip all the time.
As shown in Figure 3, very low power 3 is covered with the side at electrode 2 equably, symmetrical, but is asymmetric structure up and down, and the degree of depth of very low power is in deepening trend gradually up and down, and wherein topmost very low power is the first very low power, gash depth h
1the most shallow, preferred depth is 0.01 millimeter, be symmetrically from top to bottom the second very low power to the n-th very low power, the gash depth Changing Pattern of very low power is: h
n=h
(n ?1)+ D/m, wherein h
(n ?1)for the surperficial n of electrode 2 ?the degree of depth of 1 article of very low power, h
nbe the degree of depth of n-th very low power, the external diameter of the span of n to be 1<n<30, D be electrode 2, m is an arithmetic number span is 50<m<80.The electrode 2 that the utility model uses is the red copper electrode of hollow, central shaft to passage 5 are gas passages in the electrical spark working man-hour taking gas as medium; The angle of very low power 3 two sides on electrode 2 surface is 45 ~ 60 degree.
As shown in Figure 4 and Figure 5, a kind of apply the asymmetric degree of depth very low power electrode discharge processing micro-curved hole method time, electrode 2 connects the negative pole of the pulse power, workpiece 6 connects the positive pole of the pulse power, the voltage of the pulse power is 20 ~ 300V, and electric current is 0.5 ~ 50A, pulse power frequency 20 ~ 1000Hz.Passage 5 in electrode 2 passes into air pulse, and frequency is identical with pulse power frequency, and be all 20 ~ 1000Hz, air pulse can assist excretion.Add man-hour carrying out micro discharge in gas, because the V groove of different depth is different on the impact of micro discharge, the dark very low power of the degree of depth is owing to more contributing to exhaust and chip removal, this makes advantageously in generation spark discharge, material removal rate also significantly improves, thus it is different to make the local material of electrode different depth microflute remove speed; In the dark place of the very low power degree of depth because material removal rate is larger, make the gap between this place's electrode and workpiece also larger, the to the right directed force F 2 of instantaneous expansion air-flow to electrode that electric discharge produces is less, and the shallow place of depth of mini longitudinal channels due to material removal rate less, gap between this place's electrode and workpiece is just very little, the instantaneous expansion air-flow that electric discharge produces is comparatively large to the directed force F left 1 of electrode, i.e. F2<F1.The active force that this makes electrode be subject in different directions is different, and stressed imbalance will make electrode tip 7 bend; Electrode is bending to stressed minimum direction makes electric spark micro discharge 8 direction also change.This asymmetric discharge removal efficiency makes microelectrode towards the skew of darker direction, the microflute face of cylinder, thus processes microbend hole.The degree of crook of bent hole is relative to hole point of penetration at the bottom of passing hole, weighs along direction deviation distance W (Fig. 4) vertical with electrode direction of feed.Offset distance W is by changing formula h
n=h
(n ?1)+ D/m, 1<n<30,50<m<80, in parameter m control, after electrode overall diameter D determines, parameter m is worth less within the limits prescribed, and the offset distance W at the bottom of hole, hole processed is just relatively larger, can be controlled the size of offset distance W by the value of control m.Can process aperture is 0.15 ~ 3.2 millimeter, offset distance 0.1<W<5 millimeter.
Embodiment 1
Method processes sparking electrode as shown in Figure 1, at the upper fine diamond emery wheel adopting diameter 150 millimeters of CNC precision grinder (SMRART B818), the granularity of skive is 3000 orders, and bonding agent is resin, concentration is 100%, and skive V-arrangement tip angle is 60 degree.Diameter be 1 millimeter, the aperture of passage 5 is the very low power 3 of the columniform electrode 2 Surface Machining V-arrangement of 0.2 millimeter, very low power 3 direction is along the axis of cylinder electrode, and the change in depth rule of very low power 3 is: h
n=h
(n ?1)+ D/50, h
1=0.01 millimeter, D=1 millimeter.Finally process 38 grooves at cylinder electrode outer surface, very low power 3 is V-shaped, and two sides angle is 60 degree.Due to the symmetrical distribution of groove on electrode (as Fig. 2) surface that the present embodiment makes, the degree of depth h of the most shallow very low power
1=0.01 millimeter, the degree of depth h of the darkest very low power
n=h
19=0.39 millimeter.
Being added by fluted for processing electrode is held on HAN SPARK precision EDM shaping machine, and pulse power current settings is 2A, and voltage is 20V, supply frequency 300Hz, and working depth is 4 millimeters.Processing work appearance and size is long 50 millimeters, wide 50 millimeters, thick 4 millimeters aluminium sheets.Micro discharge adds man-hour, because the V groove of different depth is different on the impact of micro discharge, the dark microflute of the degree of depth contributes to chip removal more, this makes advantageously in generation spark discharge, material removal rate also significantly improves, cause direction skew large to material removing rate at the bottom of machining hole hole, thus process bent hole.The degree of crook of bent hole in this example at the bottom of passing hole relative to hole point of penetration, weigh along direction deviation distance W (Fig. 4) vertical with electrode direction of feed.Offset distance W is by changing formula h
n=h
(n ?1)+ D/m, 1<n<30,50<m<80, in parameter m control, after the overall diameter D of electrode determines, parameter m is worth less within the limits prescribed, and the offset distance W at the bottom of hole, hole processed is just relatively larger, can be controlled the size of offset distance W by the value of control m.In the present embodiment, m value is 50.Finally process at surface of the work the hole that the degree of depth is 3.2 millimeters, diameter is 1.2 millimeters.Relative to hole point of penetration at the bottom of hole, be 1mm (in Fig. 2 W) along the direction deviation distance vertical with electrode direction of feed, process time is 5 minutes.
Embodiment 2
Sparking electrode is processed by method as shown in Figure 1, at the upper fine diamond emery wheel adopting diameter 150 millimeters of CNC precision grinder (SMRART B818), the granularity of skive is 3000 orders, bonding agent is resin, concentration is 100%, and skive V-arrangement tip angle is 60 degree.Diameter be 1 millimeter, internal orifice dimension is the very low power 3 of the cylinder electrode Surface Machining V-arrangement of 0.2 millimeter, very low power 3 direction is along the axis of cylinder electrode, and the change in depth rule of very low power is: h
n=h
(n ?1)+ D/m, h
1=0.01 millimeter, D=1 millimeter, m=60.Finally process 42 very low power at cylinder electrode outer surface, very low power is V-shaped, and two sides angle is 60 degree.Due to the symmetrical distribution of very low power on electrode (as shown in Figure 2) surface that the present embodiment makes, the degree of depth h of the most shallow very low power
1=0.01 millimeter, the degree of depth h of the darkest very low power
n=h
21=0.35 millimeter.
Processing work material is mould steel (Datong District S ?star), and appearance and size is long 40 millimeters, wide 40 millimeters, thick 8 millimeters.Added by the electrode being processed with very low power and be held on HAN SPARK precision EDM shaping machine, current settings is 2A, and voltage is 60V, supply frequency 300Hz, and working depth is 4 millimeters.The same degree of crook being carried out control hole by control m value of this example, in this example, m value is 60.Finally process at surface of the work the hole that the degree of depth is 3.1 millimeters, diameter is 1.2 millimeters.Relative to hole point of penetration at the bottom of hole, be 0.8 millimeter (in Fig. 2 W) along the direction deviation distance vertical with electrode direction of feed, process time is 6 minutes.The workpiece that the present embodiment is processed is injection mold steel, is mainly used in the making in micro-curved hole in injection mold.
Embodiment 3
Sparking electrode is processed by method as shown in Figure 1, at the upper fine diamond emery wheel adopting diameter 150 millimeters of CNC precision grinder (SMRART B818), the granularity of skive is 3000 orders, bonding agent is resin, concentration is 100%, and skive V-arrangement tip angle is 60 degree.Be 1 millimeter at diameter, air vent diameter is the very low power 3 of the columniform electrode surface processing V-arrangement of 0.2 millimeter, and very low power direction is along the axis of cylinder electrode, and the change in depth rule of very low power is: h
n=h
(n ?1)+ D/m, h
1=0.01 millimeter, D=1 millimeter, m=80.Finally process 46 very low power at cylinder electrode outer surface, very low power is V-shaped, and two sides angle is 60 degree.Due to the symmetrical distribution of groove on electrode (as shown in Figure 2) surface that the present embodiment makes, the degree of depth h of the most shallow very low power
1=0.01 millimeter, the degree of depth h of the darkest very low power
n=h
23=0.3 millimeter.
Processing work material is WC carbide alloy, and appearance and size is long 10 millimeters, wide 10 millimeters, thick 8 millimeters.Added by the electrode being processed with very low power and be held on HAN SPARK precision EDM shaping machine, current settings is 2A, and voltage is 80V, supply frequency 300Hz, and working depth is 4 millimeters.The same degree of crook being carried out control hole by control m value of this example, in this example, m value is 80.Finally process at surface of the work the hole that the degree of depth is 3.3 millimeters, diameter is 1.2 millimeters.Relative to hole point of penetration at the bottom of hole, be 0.61 millimeter (in Fig. 2 W) along the direction deviation distance vertical with electrode direction of feed, process time is 9 minutes.The workpiece material of the present embodiment processing is carbide alloy, is mainly used in the making in the micro-curved hole of abnormity in diel.
Claims (6)
1. an asymmetric degree of depth very low power electrode, it is characterized in that, at the whole very low power being circumferentially furnished with V-arrangement vertically of columniform electrode, very low power is whole circumferentially symmetrical, be mal-distribution up and down, the degree of depth of very low power is in deepening trend gradually up and down, and wherein topmost very low power is the degree of depth h of the first very low power, the first very low power
1the most shallow, be symmetrically from top to bottom the second very low power to the n-th very low power, the gash depth Changing Pattern of very low power is: h
n=h
(n ?1)+ D/m, wherein h
(n ?1)for electrode surface n ?the degree of depth of 1 article of very low power, h
nbe the degree of depth of n-th very low power, the external diameter of the span of n to be 1<n<30, D be electrode, m is an arithmetic number, and span is 50<m<80; The center of electrode is provided with passage, and the diameter of passage is 0.1 ~ 2.5 millimeter; The surface of described very low power scribbles insulating coating.
2. asymmetric degree of depth very low power electrode according to claim 1, is characterized in that, the angle of the v-shaped structure two sides of described very low power is 45 ~ 60 degree.
3. asymmetric degree of depth very low power electrode according to claim 1, is characterized in that, the degree of depth h of described first very low power
1it is 0.01 millimeter.
4. asymmetric degree of depth very low power electrode according to claim 1, is characterized in that, the material of described electrode is red copper.
5. asymmetric degree of depth very low power electrode according to claim 1, is characterized in that, the degree of depth of described very low power is 10 ~ 300 microns.
6. asymmetric degree of depth very low power electrode according to claim 1, is characterized in that, the thickness of described insulating coating is 0.006 ~ 0.01 millimeter, and the material of insulating coating is aryl polyimides.
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| CN201520130919.2U CN204584482U (en) | 2015-03-06 | 2015-03-06 | A kind of asymmetric degree of depth very low power electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741711A (en) * | 2015-03-06 | 2015-07-01 | 华南理工大学 | Asymmetrical-depth micro-groove electrode and method for electrical discharge machining micro-bending holes by application of the same |
-
2015
- 2015-03-06 CN CN201520130919.2U patent/CN204584482U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741711A (en) * | 2015-03-06 | 2015-07-01 | 华南理工大学 | Asymmetrical-depth micro-groove electrode and method for electrical discharge machining micro-bending holes by application of the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150826 Effective date of abandoning: 20170419 |