CN109530836A - A kind of cutting head and its cutting process method for mould steel - Google Patents
A kind of cutting head and its cutting process method for mould steel Download PDFInfo
- Publication number
- CN109530836A CN109530836A CN201811630212.2A CN201811630212A CN109530836A CN 109530836 A CN109530836 A CN 109530836A CN 201811630212 A CN201811630212 A CN 201811630212A CN 109530836 A CN109530836 A CN 109530836A
- Authority
- CN
- China
- Prior art keywords
- medium
- wire electrode
- cutting
- hole
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 238000005520 cutting process Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 239000007921 spray Substances 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims description 42
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000002679 ablation Methods 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052702 rhenium Inorganic materials 0.000 claims description 6
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000010937 tungsten Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 239000004047 hole gas Substances 0.000 claims 1
- 239000011858 nanopowder Substances 0.000 claims 1
- 229910001566 austenite Inorganic materials 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 4
- 239000002609 medium Substances 0.000 description 72
- 239000010410 layer Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000004927 fusion Effects 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010892 electric spark Methods 0.000 description 3
- 238000002224 dissection Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 241000277275 Oncorhynchus mykiss Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012913 medium supplement Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/36—Supply or regeneration of working media
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
A kind of cutting head and its cutting process method for mould steel.The present invention is provided with the medium spray head of through-hole or hole between the support column and wire electrode of cutting head, provides gas medium or liquid medium by the position that the medium spray head is in contact for the wire electrode with mold steel workpiece to be processed under cut state.Cutting head of the invention reduces austenite formed in cutting process using medium, reduces cut surface metamorphic layer thickness during carrying out Wire EDM as a result,.In turn, the present invention can guarantee the mechanical strength and thermal strain performance of finished product cut surface after cutting by above-mentioned technique, improve cut surface service life, effectively prevent workpiece deformation, cracking, improves cutting accuracy.
Description
Technical field
The present invention relates to mould steel processing equipment field more particularly to a kind of cutting heads and its cutting for mould steel
Processing method.
Background technique
Mould steel is usually used in manufacturing cold-punching mould, hot die or compression mod, with greater hardness, thus it is not easy to be processed.
In cutting process, cutter breaking is easily caused, cut surface is coarse, it is difficult to meet requirement on machining accuracy.
Since mould steel hardness itself is higher, in cutting process, the cutter being applied to it are easy breaking, or beat
Sliding, offset generates the offset of position easily in cutting process between cutter or mold steel workpiece to be cut.
For convenience of cutting, the prior art reduces mould steel difficulty of processing through the mode frequently with heat treatment.However mould steel
Itself there are thermal fatigue characteristics, the heat treatment in process, especially heat-treatment quenching temperature will affect mould steel cut surface
The structural homogenity of austenite grain size, the solid solubility of alloying element and workpiece surface, so influence mold steel workpiece at
The whole thermal fatigue property of product.
During mould steel is on active service, cut surface need to also be subjected to cool to during each demoulding, lubricated,
This frequent shock heating shock chilling function can further deteriorate the thermal fatigue property of mold steel workpiece during military service.Existing mold steel
Influence of the surface due to rapid heating and cooling in process after work piece cut, formation heat affected layer, crystalline texture alienation, inwardly
Thermal metamorphism layer is formed, workpiece stress intensity is influenced, the workpiece after making cutting is easily-deformable, cracks.
Summary of the invention
In order to solve the shortcomings of the prior art, the purpose of the present invention is to provide a kind of cuttings for mould steel
Head and its cutting process method.
Firstly, to achieve the above object, propose a kind of cutting head for mould steel, including support column, wire feeder and
Wire electrode, the wire electrode bypass the lower end of the support column, and the wire feeder drives the wire electrode relatively to be processed
Mould steel workpiece motion s under cut state, discharge between the wire electrode and mold steel workpiece to be processed, to be added described in ablation
The position that the mold steel workpiece surface of work is contacted with the wire electrode.Wherein, the support column is hollow structure, lower end connection
There is medium spray head, the medium spray head is arranged between the support column and the wire electrode, and the upper end of the support column connects
There is gas-liquid triple valve for importing gas medium or liquid medium, the gas medium or liquid medium into the hollow structure
Hollow structure inside the support column flows to the medium spray head；The outer surface of the medium spray head is provided with described in receiving
The groove of wire electrode, the depth of the groove are no more than the diameter of the wire electrode, and the inner wall of the groove or outside are also set up
There are through-hole or hole, the gas medium that the through-hole or hole are at least partly accommodated with the support column hollow structure inside
Or liquid medium contact；Under cut state, the through-hole or hole are transported in wire electrode mold steel workpiece relatively to be processed
In dynamic process, by the hollow structure gas medium or liquid medium lead to the wire electrode surface and it is described to
The position that the mold steel workpiece of processing is in contact；Or the through-hole or hole are by the gas medium or liquid in the hollow structure
Body medium draws and is coated on the surface of the wire electrode；The gas medium includes inert gas, sulphur removal gas, except carbon gas
Or mixtures thereof；The liquid medium is deionized water or oil medium, is also mixed with metal powder in the liquid medium, institute
State metal powder include iron, rhenium, titanium, tungsten, manganese, chromium, in any in magnesium or its mixing；The wire feeder includes guide wheel, institute
Wire electrode is stated by bypassing on the guide wheel, the position that the guide pulley surface is contacted with the wire electrode is additionally provided with temperature sensor,
For detecting the temperature of the wire electrode, expand opening for the gas-liquid triple valve when the temperature of the wire electrode is more than preset value
Degree increases the flow of the gas medium or liquid medium drawn by the through-hole or hole.
Optionally, the above-mentioned cutting head for mould steel, wherein the medium spray head is sphere, oblate spheroid or wheel disc
Shape structure, diametrical direction are provided with connector, and the connector is connect with the lower end of the support column, the sphere, oblate spheroid
Body takes turns disk-like structure around the radial rotating of the connector；The groove for accommodating the wire electrode is set to the medium spray head table
Perpendicular in the circumferential direction of the connector, the direction of the groove is identical as the direction that the medium spray head rotates in face；It is described logical
Hole or hole are along the sphere, oblate spheroid or the rotation direction arrangement for taking turns plate-like.
Optionally, the above-mentioned cutting head for mould steel, wherein the gas medium includes nitrogen, oxygen or it is mixed
Close object.
Optionally, the above-mentioned cutting head for mould steel, wherein the gas medium is compressed air.
Optionally, the above-mentioned cutting head for mould steel, wherein the metal powder is nanometer powder, and diameter is not
More than 50nm, the liquid medium is the suspension for mixing the nanometer powder.
Optionally, the above-mentioned cutting head for mould steel, wherein the preset value of the temperature of the wire electrode is 300 DEG C.
Secondly, to achieve the above object, it is also proposed that a kind of cutting process method for mould steel, step include: first
Step, to mould steel heat treatment of workpieces to be processed to critical-temperature or more；Second step, to the mould steel work after heat treatment
Part is slowly annealed to 250 DEG C, and annealing rate is no more than 30 DEG C per hour；Third step carries out electric spark to the mold steel workpiece
Wire cutting, the driving electrodes silk mould steel workpiece motion s relatively to be processed, under cut state, the wire electrode with it is to be processed
Mold steel workpiece between discharge, the position that mold steel workpiece surface to be processed is contacted with the wire electrode described in ablation；1st
It is provided to the position that when 2 cuttings, the synchronous surface to the wire electrode is in contact with the mold steel workpiece to be processed
Gas medium；The gas medium includes or mixtures thereof nitrogen, oxygen, compressed air；3rd cutting is until finally successively
Cutting, the position that the synchronous surface to the wire electrode is in contact with the mold steel workpiece to be processed provide liquid and are situated between
Matter；The liquid medium is deionized water or oil medium, is also mixed with nano level metal powder in the liquid medium, described
Metal powder include iron, rhenium, titanium, tungsten, manganese, chromium, in any in magnesium or its mixing.
Optionally, the above-mentioned cutting process method for mould steel further includes the temperature for detecting the wire electrode, in institute
The stream of the gas medium or liquid medium that provide to the surface of the wire electrode is provided when stating the temperature of wire electrode more than preset value
Amount or pressure, the critical-temperature is between 250 to 350 DEG C.
Beneficial effect
The present invention between the support column and wire electrode of cutting head by being provided with the medium spray head of through-hole or hole, by this
The position that medium spray head is in contact for the wire electrode with mold steel workpiece to be processed under cut state provides gas medium
Or liquid medium.Cutting head of the invention is cut through during carrying out Wire EDM using medium reduction as a result,
Austenite formed in journey reduces cut surface metamorphic layer thickness.In turn, after the present invention can guarantee cutting by above-mentioned technique
The mechanical strength and thermal strain performance of finished product cut surface improve cut surface service life, effectively prevent workpiece deformation, cracking.
It further, is the performance for improving mould steel cut surface, the present invention is also further added with metal in liquid medium
Powder is formed on the cut surface by the effect of the nanometer powders such as iron, rhenium, titanium, tungsten, manganese, chromium, magnesium and wire electrode charge
New dense protective layer.The protective layer after electromagnetic excitation polarizes, is merged and is formed by into dissection by above-mentioned metal powder
Austenite or rotten layer surface, nanoscale metal particles are due to the fusion, so that austenite or metamorphic layer are formed by weight
Crucible zone physical property changes, and greatly improves the hardness and brittleness of cut surface, it is made to be unlikely to deform cracking.
Further, since the medium spray head structure that the present invention is special, is arranged in the groove of accommodate electrod silk and is provided out
The through-hole or hole of liquid medium or gas medium, gas medium or liquid medium by the through-hole during wire electrode is applied
Added with the pressure to workpiece, pressure forces contact strength of the wire electrode between workpiece or makes to maintain phase at a distance between the two
To in stable range, and reduces it and receive the effect of electrostatic force and force of explosion in cutting process and tremble.Present invention cutting as a result,
Surface afterwards is more smooth, can save processing cost for subsequent technique.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, and with it is of the invention
Embodiment together, is used to explain the present invention, and is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the integrally-built schematic diagram of cutting processing device according to the present invention；
Fig. 2 is the overall structure signal of cutting head in the present invention；
Fig. 3 is the structural schematic diagram of the first medium spray head in the present invention；
Fig. 4 is the structural schematic diagram of second of medium spray head in the present invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 1 is a kind of cutting processing device for mould steel according to the present invention comprising:
Cutting platform 1, is provided with mold steel workpiece to be processed above, and the Cutting platform is described to be processed for fixing
Mold steel workpiece, or it is mobile relative to the cutter device 2 on its surface for the workpiece；
Cutter device 2, including wire feeder and wire electrode, the wire feeder include several wheel shafts, and wheel shaft drives the electrode
Silk moves back and forth or one-way movement, thus, so that the relatively described mold steel workpiece to be processed of the wire electrode at cutter head position
Movement.Under cut state, the wire electrode has charge, discharges between wire electrode and mold steel workpiece to be processed, generates
The position that electrostatic force and explosive force are contacted with mold steel workpiece surface to be processed described in ablation with the wire electrode；
Protective device 4 is coated on the outside of the cutter device 2, avoids electric spark or metal broken caused by cutting process
Bits splash.Gas supply or feed liquid pipeline can be also connected with inside protective device, feed liquid pipeline is sprayed to the workpiece surface of cutting part
Liquid makes its temperature in cutting process keep stablizing.Steam line exports specific gas to the workpiece surface of cutting part,
To guarantee cutting effect.
Refering to what is shown in Fig. 2, during cutter device 2 of the invention can also further set the support column 21 of fixed cutting head to
Hollow structure, lower end are connected with medium spray head 24, and the medium spray head 24 is arranged between the support column and the wire electrode,
The upper end of the support column 21 is connected with gas-liquid triple valve 25 and is situated between for importing gas medium or liquid into the hollow structure
The hollow structure of matter, the gas medium or liquid medium inside the support column 21 flows to the medium spray head 24.It is described
The outer surface of medium spray head 24 is provided with the groove for accommodating the wire electrode 23, and the depth of the groove is no more than the wire electrode
23 diameter, the inner wall of the groove or outside are additionally provided with through-hole 26 or hole, and the through-hole 26 or hole are at least partly
The gas medium or liquid medium accommodated with 21 hollow structure inside of support column contacts；Under cut state, the through-hole
26 or hole during the wire electrode 23 mould steel workpiece motion s relatively to be processed, by the gas in the hollow structure
Body medium or liquid medium lead to the position that the surface of the wire electrode 23 is in contact with the mold steel workpiece to be processed；
Or the through-hole 26 or hole by the hollow structure gas medium or liquid medium draw and be coated on the electrode
The surface of silk 23.
At Fig. 3 or implementation shown in Fig. 4, above-mentioned medium spray head 24 be sphere, oblate spheroid or wheel disk-like structure,
Its diametrical direction is provided with connector 27, and the connector is connect with the lower end of the support column 21, the sphere, oblate spheroid or
Disk-like structure is taken turns around the radial rotating of the connector 27；The groove for accommodating the wire electrode 23 is set to the medium spray head 24
Perpendicular in the circumferential direction of the connector 27, the direction of the groove is identical as the direction that the medium spray head 24 rotates on surface；
The through-hole 26 or hole are along the sphere, oblate spheroid or the rotation direction arrangement for taking turns plate-like.
By above-mentioned cutting head, the present invention can be carried out it after to mold steel workpiece pretreatment to be processed
Spark cutting under special media.In cutting process:
The mould steel workpiece motion s relatively to be processed of driving electrodes silk 23, under cut state, the wire electrode with it is to be processed
Mold steel workpiece between discharge, the position that mold steel workpiece surface to be processed is contacted with the wire electrode described in ablation；
In the 1st to 2 cutting, the synchronous surface to the wire electrode 23 is in contact with the mold steel workpiece to be processed
Position provide gas medium；The gas medium includes or mixtures thereof nitrogen, oxygen, compressed air；
In the 3rd cutting until when finally successively cutting, the synchronous surface to the wire electrode 23 and the mould to be processed
The position that tool steel workpiece is in contact provides liquid medium；The liquid medium is deionized water or oil medium, and the liquid is situated between
Also be mixed with diameter metal powder within 50 nanometers in matter, the metal powder include iron, rhenium, titanium, tungsten, manganese, chromium, in magnesium
In any or it is mixed.
Under the electric spark effect of cutting, apply electrostatic force and force of explosion to workpiece surface mould steel makes the present invention as a result,
When its partial melting, nitrogen or inert gas can be passed through by the sulfide and carbon impurity that the dioxygen oxidation of importing dissolves out
Protect metal unaffected.During further cutting, since above-mentioned medium spray head directly introduces at cut point
Liquid medium containing nano metal, the nanometer powder and wire electrode charge effect restore rigidity in cut surface molten metal
In the process, it is embedded between crystal, forms new dense protective layer on the cut surface.The protective layer is passed through by above-mentioned metal powder
After electromagnetic excitation polarization, merges and be formed by austenite or rotten layer surface into dissection, nanoscale metal particles are due to this
Fusion greatly improves the hardness of cut surface so that austenite or metamorphic layer are formed by the change of remelted layer physical property
And brittleness, so that it is unlikely to deform cracking.
Fusion process to be further ensured that between above-mentioned metal is not interfered by external environment, and above-mentioned fusion process need to gone
It is carried out under the closed state of ionized water or oil medium, also, needs to guarantee that fusion point temperature is stablized in the process.To reach the mesh
, the present invention is also equipped with temperature sensor at the position that the guide pulley surface of the wire feeder 22 is contacted with the wire electrode 23.
Wire electrode 23 on the guide wheel by bypassing, and the temperature of the wire electrode 23 can be detected in temperature sensor on the guide wheel, passes through
The temperature of wire electrode judges fusion point temperature regime.Expand the gas-liquid three when the temperature of the wire electrode 23 is more than preset value
The aperture of port valve 25, the flow for increasing the gas medium or liquid medium drawn by the through-hole 26 or hole are extra to take away
Heat.
By experiment with computing, the wire electrode of cut point reaches idler positions after aforesaid liquid or gas medium supplement heat rejecter
Temperature generally between 240 ~ 300 DEG C, corresponding fusion point temperature be more suitable for the molding of above-mentioned remelted layer stable structure simultaneously
Keep rigidity appropriate.Best performance can be obtained by setting 300 DEG C for the preset value of the wire electrode temperature of sensor judgement
Cut surface, temperature rise again, and performance degradation no longer has clear superiority.
Above-mentioned treatment process also relies on the pretreatment to workpiece.Its step includes: the first step, to mould steel to be processed
Heat treatment of workpieces is to critical-temperature or more；Second step is slowly annealed to 250 DEG C to the mold steel workpiece after heat treatment,
Annealing rate is no more than 30 DEG C per hour.Slowly annealing is able to maintain workpiece overall performance and stablizes, and further prevents cutting process
Middle craze and transfiguration.The reason is that workpiece surface is inconsistent to the cold and hot rate in center, and temperature difference can be in its mechanism before cutting
Generating expansion heterogeneous leads to the unbalanced of internal stress.In process, cut point and the metal inside temperature difference are aggravated, above-mentioned non-
Balanced stress further acts on, so that cut point tensile stress aggravation nearby, causes cut surface to be broken.And slowly anneal, it can protect
It holds metal inside to reach unanimity with surface temperature, can effectively reduce above-mentioned stress, promote cutting effect.
Those of ordinary skill in the art will appreciate that: the foregoing is only a preferred embodiment of the present invention, and does not have to
In the limitation present invention, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art
For, still can to foregoing embodiments record technical solution modify, or to part of technical characteristic into
Row equivalent replacement.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of cutting head for mould steel, including support column (21), wire feeder (22) and wire electrode (23), the electrode
Silk (23) bypasses the lower end of the support column (21), and the wire feeder (22) drives the wire electrode (23) relatively to be processed
Mold steel workpiece (3) moves, and under cut state, discharges between the wire electrode and mold steel workpiece to be processed, described in ablation
The position that mold steel workpiece surface to be processed is contacted with the wire electrode, which is characterized in that
The support column (21) is hollow structure, and lower end is connected with medium spray head (24), and medium spray head (24) setting exists
Between the support column and the wire electrode, the upper end of the support column (21) is connected with gas-liquid triple valve (25) and is used for described
Gas medium or liquid medium, the gas medium or liquid medium are imported in hollow structure along the support column (21) inside
Hollow structure flows to the medium spray head (24)；
The outer surface of the medium spray head (24) is provided with the groove for accommodating the wire electrode (23), and the depth of the groove does not surpass
The diameter of the wire electrode (23) is crossed, the inner wall of the groove or outside are additionally provided with through-hole (26) or hole, the through-hole
(26) or the hole gas medium or liquid medium that are at least partly accommodated with the support column (21) hollow structure inside connect
Touching；Under cut state, the through-hole (26) or hole are in the wire electrode (23) mould steel workpiece motion s relatively to be processed
In the process, by the hollow structure gas medium or liquid medium lead to the wire electrode (23) surface and it is described to
The position that the mold steel workpiece of processing is in contact；Or the through-hole (26) or hole are by the gas medium in the hollow structure
Or liquid medium draws and is coated on the surface of the wire electrode (23)；
The gas medium includes inert gas, sulphur removal gas, except or mixtures thereof carbon gas；
The liquid medium is deionized water or oil medium, is also mixed with metal powder, the metal in the liquid medium
Powder include iron, rhenium, titanium, tungsten, manganese, chromium, in any in magnesium or its mixing；
The wire feeder (22) includes guide wheel, and the wire electrode (23) on the guide wheel by bypassing, the guide pulley surface and institute
The position for stating wire electrode (23) contact is additionally provided with temperature sensor, for detecting the temperature of the wire electrode (23), in the electricity
The temperature of polar filament (23) expands the aperture of the gas-liquid triple valve (25) when being more than preset value, increase by the through-hole (26) or hole
The flow of gas medium or liquid medium that gap is drawn.
2. as described in claim 1 be directed to mould steel cutting head, which is characterized in that the medium spray head (24) be sphere,
Oblate spheroid or wheel disk-like structure, diametrical direction are provided with connector (27), under the connector and the support column (21)
End connection, the radial rotating of the sphere, oblate spheroid or wheel disk-like structure around the connector (27)；
The groove for accommodating the wire electrode (23) is set to the medium spray head (24) surface perpendicular to the connector (27)
In circumferential direction, the direction of the groove is identical as the direction that the medium spray head (24) rotates；
The through-hole (26) or hole are along the sphere, oblate spheroid or the rotation direction arrangement for taking turns plate-like.
3. being directed to the cutting head of mould steel as described in claim 1, which is characterized in that the gas medium includes nitrogen, oxygen
Or mixtures thereof gas.
4. being directed to the cutting head of mould steel as described in claim 1, which is characterized in that the gas medium is compressed air.
5. the cutting head for mould steel as described in Claims 1-4, which is characterized in that the metal powder is nano powder
End, diameter are no more than 50nm, and the liquid medium is the suspension for mixing the nanometer powder.
6. the cutting head for mould steel as described in claim 1 to 5, which is characterized in that the temperature of the wire electrode (23)
Preset value be 300 DEG C.
7. a kind of cutting process method for mould steel, which is characterized in that step includes:
The first step, to mould steel heat treatment of workpieces to be processed to critical-temperature or more；
Second step is slowly annealed to 250 DEG C to the mold steel workpiece after heat treatment, and annealing rate is no more than 30 DEG C per small
When；
Third step carries out Wire EDM, driving electrodes silk (23) mould relatively to be processed to the mold steel workpiece
Have steel workpiece to move, under cut state, discharge between the wire electrode and mold steel workpiece to be processed, it is to be processed described in ablation
The position that is contacted with the wire electrode of mold steel workpiece surface；
When the 1st to 2 cutting, the synchronous surface to the wire electrode (23) is in contact with the mold steel workpiece to be processed
Position provide gas medium；The gas medium includes or mixtures thereof nitrogen, oxygen, compressed air；
3rd cutting is until finally successively cut, the synchronous surface to the wire electrode (23) and the mold to be processed
The position that steel workpiece is in contact provides liquid medium；The liquid medium is deionized water or oil medium, the liquid medium
Inside also be mixed with nano level metal powder, the metal powder include iron, rhenium, titanium, tungsten, manganese, chromium, in any in magnesium or it is mixed
It closes.
8. being directed to the cutting process method of mould steel as claimed in claim 6, which is characterized in that further include: detect the electricity
The temperature of polar filament (23) increases to the surface of the wire electrode (23) when the temperature of the wire electrode (23) is more than preset value and mentions
The gas medium of confession or the flow of liquid medium or pressure, the critical-temperature is between 250 to 350 DEG C.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630212.2A CN109530836A (en) | 2018-12-28 | 2018-12-28 | A kind of cutting head and its cutting process method for mould steel |
| PCT/CN2019/098733 WO2020134080A1 (en) | 2018-12-28 | 2019-07-31 | Cutter for mold steel, and cutting machining method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630212.2A CN109530836A (en) | 2018-12-28 | 2018-12-28 | A kind of cutting head and its cutting process method for mould steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109530836A true CN109530836A (en) | 2019-03-29 |
Family
ID=65831007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811630212.2A Withdrawn CN109530836A (en) | 2018-12-28 | 2018-12-28 | A kind of cutting head and its cutting process method for mould steel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109530836A (en) |
| WO (1) | WO2020134080A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134080A1 (en) * | 2018-12-28 | 2020-07-02 | 苏州昕玺包装制品有限公司 | Cutter for mold steel, and cutting machining method therefor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301349A (en) * | 1978-10-06 | 1981-11-17 | Inoue-Japax Research Incorporated | Electrical machining apparatus for forming a three-dimensional surface contour in a workpiece |
| JPS63156620A (en) * | 1986-12-19 | 1988-06-29 | Inoue Japax Res Inc | Wire-cut electric discharge machine |
| JPH06206121A (en) * | 1993-01-11 | 1994-07-26 | Mitsubishi Electric Corp | Wire electric discharge machine |
| CN201020545Y (en) * | 2006-05-08 | 2008-02-13 | 沈强 | Internal cooling knife with atomized jet |
| JP2010221371A (en) * | 2009-03-25 | 2010-10-07 | Mitsubishi Electric Corp | Wire electric discharge machining apparatus and wire electric discharge machining method |
| CN206169430U (en) * | 2016-11-15 | 2017-05-17 | 徐州工程学院 | Attached formula seamless process liquid spray device of wire -electrode cutting |
| CN107900615A (en) * | 2017-11-13 | 2018-04-13 | 常州工学院 | A kind of Wire EDM and surface peening combined machining method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2841220Y (en) * | 2005-11-22 | 2006-11-29 | 任建强 | Molybdenum filament jitter buffer device in the line cutting processing |
| CN102398094A (en) * | 2011-11-24 | 2012-04-04 | 张祖田 | U-shaped slow wire walking head for cutting wires |
| CN102528550B (en) * | 2012-02-07 | 2013-10-30 | 东莞市安默琳节能环保技术有限公司 | Micro-lubricating supply system for machining of external-cooling and internal-cooling high-speed machine tool |
| CN109530836A (en) * | 2018-12-28 | 2019-03-29 | 太仓新思成模具钢有限公司 | A kind of cutting head and its cutting process method for mould steel |
-
2018
- 2018-12-28 CN CN201811630212.2A patent/CN109530836A/en not_active Withdrawn
-
2019
- 2019-07-31 WO PCT/CN2019/098733 patent/WO2020134080A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301349A (en) * | 1978-10-06 | 1981-11-17 | Inoue-Japax Research Incorporated | Electrical machining apparatus for forming a three-dimensional surface contour in a workpiece |
| JPS63156620A (en) * | 1986-12-19 | 1988-06-29 | Inoue Japax Res Inc | Wire-cut electric discharge machine |
| JPH06206121A (en) * | 1993-01-11 | 1994-07-26 | Mitsubishi Electric Corp | Wire electric discharge machine |
| CN201020545Y (en) * | 2006-05-08 | 2008-02-13 | 沈强 | Internal cooling knife with atomized jet |
| JP2010221371A (en) * | 2009-03-25 | 2010-10-07 | Mitsubishi Electric Corp | Wire electric discharge machining apparatus and wire electric discharge machining method |
| CN206169430U (en) * | 2016-11-15 | 2017-05-17 | 徐州工程学院 | Attached formula seamless process liquid spray device of wire -electrode cutting |
| CN107900615A (en) * | 2017-11-13 | 2018-04-13 | 常州工学院 | A kind of Wire EDM and surface peening combined machining method and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134080A1 (en) * | 2018-12-28 | 2020-07-02 | 苏州昕玺包装制品有限公司 | Cutter for mold steel, and cutting machining method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020134080A1 (en) | 2020-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kou et al. | On sustainable manufacturing titanium alloy by high-speed EDM milling with moving electric arcs while using water-based dielectric | |
| CN105369024B (en) | A kind of method for producing gradient nano structure on martensite steel surface | |
| CN109465512A (en) | A media nozzle for die steel cutting | |
| CN105889059B (en) | A kind of hollow plunger processing technology | |
| Zhuang et al. | Employing preheating-and cooling-assisted technologies in machining of Inconel 718 with ceramic cutting tools: towards reducing tool wear and improving surface integrity | |
| JPH02224806A (en) | Plug for seamless steel pipe manufacturing | |
| WO2020010782A1 (en) | Axial friction welding process for high-nitrogen austenitic stainless steel and non-magnetic drill collar | |
| Ya-Dong et al. | Experimental and emulational investigations into grinding characteristics of Zr-based bulk metallic glass (BMG) using microgrinding | |
| CN107604138A (en) | A kind of super low temperature method and apparatus for realizing making Nano surface of metal material | |
| CN109530836A (en) | A kind of cutting head and its cutting process method for mould steel | |
| CN103850652A (en) | Process for inlaying alloy teeth of rock drilling bit | |
| JPS59175912A (en) | Carbide drill | |
| Kumar et al. | Electric discharge machining of titanium and its alloys: a review | |
| CN210121714U (en) | Medium sprayer for cutting die steel | |
| JP5535280B2 (en) | Method for strengthening welding tip and welding tip | |
| CN105798063A (en) | Piercing point | |
| CN107020408B (en) | Milling processing device | |
| CN209792811U (en) | A cutting head for die steel | |
| JP4692542B2 (en) | Protective coat and metal structure | |
| Singh et al. | Design and development of electro-discharge drilling process | |
| Singh et al. | Electrical discharge drilling of D3 die steel using air assisted rotary tubular electrode | |
| KR101182592B1 (en) | Product method of ball stud fastener | |
| CN202213041U (en) | Adjustable refractory brick embedding mold | |
| JP5265053B2 (en) | Lightweight cast iron products | |
| Shu et al. | Electrical discharge abrasive drilling of hard materials using a metal matrix composite electrode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200120 Address after: 215436 building 3, group 2, tianbang village, Liuhe Town, Taicang City, Suzhou City, Jiangsu Province Applicant after: Taicang chenghexin Precision Technology Co.,Ltd. Address before: 215431 1688 Xinyi West Road, Xintang District, Liuhe Town, Taicang City, Suzhou City, Jiangsu Province Applicant before: TAICANG XINSICHENG MOULD STEEL Co.,Ltd. |
|
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190329 |