CN107363350A - Contactless EDM System - Google Patents
Contactless EDM System Download PDFInfo
- Publication number
- CN107363350A CN107363350A CN201710817202.9A CN201710817202A CN107363350A CN 107363350 A CN107363350 A CN 107363350A CN 201710817202 A CN201710817202 A CN 201710817202A CN 107363350 A CN107363350 A CN 107363350A
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- Prior art keywords
- electric
- contactless
- spark
- coil
- edm
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Classifications
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- 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
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
-
- 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
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
-
- 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
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention relates to a kind of contactless EDM System, including contactless electrical discharge machining electric energy import system, separate structure inside and outside contactless electrical discharge machining electric energy import system use, the present invention is transduceed electric energy to tool-electrode by the way of being wirelessly transferred, it can make that compact-sized, handle of a knife dynamic balance is good with this mode, be advantageously implemented the high speed of mainshaft.The high speed rotation of main shaft can further speed up the flowing of interpolar working solution simultaneously so that electric discharge bits can discharge rapidly, further improve micro EDM efficiency.The increase of the speed of mainshaft, the generation that electric discharge collection neutralizes abnormal arcing electric discharge can be suppressed, be advantageous to improve pulse utilization rate so that process velocity further improves.
Description
Technical field
The invention belongs to spark erosion technique field, and in particular to a kind of contactless electricity based on electromagnetic induction principle
Spark processes electric energy import system.
Background technology
The more electric energy transmission means using physical contact formulas such as carbon brush, collecting ring connections of traditional electric spark electric energy transmission,
There is carbon brush in this mode, collecting ring skimming wear is very fast, caloric value is big, wire is exposed, rotating speed too high should not be also easy to produce contact
The problems such as spark.Meanwhile contact and active force on electrode be present using carbon brush, collecting ring, the vibration of electrode is addition of, is reduced
Rotating accuracy, thus most of research at present all electrode do not rotate or the slow-speed of revolution in the case of carry out.
The high speed rotation of main shaft enables to the distribution of point of discharge more scattered, can be effectively prevented from discharge position in sky
Between and temporal concentration, while the high speed rotation of main shaft can further speed up the flowing of interpolar working solution so that electric discharge bits
It can rapidly discharge, further improve micro EDM efficiency.With the increase of rotating speed, the distance between neighbouring discharge point
It can increase, heat caused by electric discharge rapidly can be taken away by interpolar working solution so as to slow down the upper of electrode local surface temperature
Rise, further suppress the generation that electric discharge collection neutralizes abnormal arcing electric discharge, be advantageous to improve pulse utilization rate so that process velocity enters
The raising of one step.
So traditional contact electric energy import system seriously limits the rotating speed and rotating accuracy of main shaft, it is urgent at present
Need a kind of new electric energy lead-in mode, you can realize high efficiency power while the speed of mainshaft and rotating accuracy are not limited.
The content of the invention
In view of this, the present invention provides a kind of contactless EDM System based on electromagnetic induction principle, can
Solve rotating speed and rotating accuracy that existing contact electric energy import system seriously limits main shaft, govern electrical discharge machining
The problem of processing efficiency and surface integrity improve.
The technical scheme for realizing the object of the invention is：
A kind of contactless EDM System based on electromagnetic induction principle, including contactless electrical discharge machining electricity
Can import system, workpiece system and liquid system.The contactless electrical discharge machining electric energy import system cause electrode with
Potential difference is produced between workpiece, realizes electrical discharge machining；The workpiece system is made up of workpiece, fixture and work nest；It is described
Liquid system includes working solution circulating system and coolant circulation system, and working solution circulating system has the work(such as cooling, deionization
Can, coolant circulation system is used for the cooling of main shaft.
Moreover, the contactless electric spark electric energy import system adds electric wire on main electric spark in main shaft stagnant end
Enclose, electric coil is connected on spark pulse power on main electric spark, and electricity on secondary level electric spark is added in rotation shank end portion
Coil, on secondary level electric spark on electric coil connection current-limiting resistance and electrode.In in pot core, induction mode uses coil winding
Inside and outside separate structure, two coils have gap.
Moreover, the signal measurement of the contactless electric spark electric energy import system uses oscillograph, while processing is tied
Fruit measures, and by both corresponding results, optimizes parameter processing.
Moreover, the workpiece of the workpiece system is completely immersed in work nest by the way that fixture locating clip is next, workpiece and lathe
Main body is affixed, and induced electromotive force one end is connected and is grounded with machine body by rotating shank end portion so that piece pole current potential
It is zero, another end joining tool electrode, spark discharge processing is carried out so as to produce electrical potential difference.
Moreover, the working solution circulating system is worked liquid using kerosene, working solution is imported into work nest, passed through by oil pump
Regulating valve carries out speed governing, while working solution is flowed back into working solution casing by timing, is filtered back by the filter of inside
Circulation is received to reuse.
Moreover, the coolant circulation system does coolant using water, when the shaft rotates, cooling circulation is started working,
When detecting that temperature control box internal reflux water temperature transfinites, temperature control box opens cooling mode, and the coolant in casing is cooled
Processing, main shaft cooling is carried out so as to be recycled to inside main shaft.
The beneficial effects of the invention are as follows：
1st, the present invention electric energy is transduceed to tool-electrode by the way of being wirelessly transferred, with this mode can make it is compact-sized,
Handle of a knife dynamic balance is good, is advantageously implemented the high speed of mainshaft.The high speed rotation of main shaft can further speed up interpolar work simultaneously
The flowing of liquid so that electric discharge bits can discharge rapidly, further improve micro EDM efficiency.The increase of the speed of mainshaft,
The generation that electric discharge collection neutralizes abnormal arcing electric discharge can be suppressed, be advantageous to improve pulse utilization rate so that process velocity is further
Raising.
2nd, potential difference is produced between electrode and workpiece by non-contact type electric energy import system, realizes electrical discharge machining.
Due to eliminating the mode on tool-electrode using brush directly to electricity, eliminate due to electrode vibration caused by contact, can be with
The high-speed rotation of main shaft is realized, improves spindle rotation accuracy, is advantageous to further improve the precision of electrical discharge machining.Electrode simultaneously
High speed rotation can promote interpolar chip removal, increase material removing rate and electrode wear rate and surface roughness all dropped
It is low.
3rd, workpiece system is used for the connection of the clamping position and piece pole of workpiece, and liquid system is used to cool down and electric eliminating
From etc. function, two systems and contactless electric spark electric energy import system organically combine, form contactless electrical discharge machining
System so that its processing characteristics is better than traditional EDM System.
4th, the present invention is different from current electrical discharge machining energy supply mode, by having with non-contact ultrasonic system
Machine integrates, and is expected to make a breakthrough in terms of processing efficiency and surface integrity is improved, and accomplishes efficient to take into account peace with high-precision
Weighing apparatus, is significant to development of the ultrasonic edm Compound Machining in micropore field.
Brief description of the drawings
Fig. 1 is the structure chart of the contactless electric spark electric energy import system scheme one of the present invention；
Fig. 2 is the structure chart of the contactless electric spark electric energy import system scheme two of the present invention；
Fig. 3 is the structure and scheme of installation of the contactless electric spark electric energy import system of the present invention；
Fig. 4 is double non-contact ultrasonic electric spark electric energy import system structure charts of the invention；
Each part mark is as follows in accompanying drawing：1st, dielectric induced line circle；2nd, electric coil (scheme 1) on main electric spark；2-1 master
Electric coil magnetic core on level electric spark；3rd, piece pole；4th, current-limiting resistance；5th, electrode；6th, electric coil (scheme on secondary level electric spark
1)；Electric coil magnetic core on 6-1, secondary level electric spark；7th, electric coil (scheme 2) on main electric spark；8th, phase regulator；9th, secondary level
Electric coil (scheme 2) on electric spark；10th, main shaft；11st, main shaft standard interface；12nd, electric coil in higher level's ultrasound；13rd, subordinate's ultrasound
Upper electric coil；14th, electric coil on secondary level electric spark；15th, electric coil on main electric spark；16th, handle of a knife is rotated；17th, ultrasonic amplitude of fluctuation
Bar；18th, tool-electrode；19th, working solution；20th, work nest；21st, fixture；22nd, workpiece；23rd, working solution liquid outlet；24th, working solution
Liquid back pipe；25th, working solution casing liquid return hole；26th, working solution filter；27th, working solution casing；28th, oil pump；29th, working solution
Liquid outlet；30th, regulating valve；31st, working solution drain pipe；32nd, working solution inlet；33rd, temperature control box；34th, temperature control box liquid outlet；
35th, temperature control box liquid return hole；36th, temperature control box drain pipe；37th, temperature control box liquid back pipe；38th, main shaft liquid outlet；39th, main shaft inlet.
Embodiment
To make technological means, creation characteristic, workflow, application method, reached purpose and effect of the present invention be easy to bright
It is white to understand, with reference to Fig. 1~Fig. 4, the present invention is expanded on further.
Scheme one by the way of conversion is set by loose coupling formula using double induction type principles in the embodiment
The transformer coil of meter, its magnetic core are designed to the Ferrite Material of abnormity.As shown in figure 1, dielectric induced line circle (1) is fixed on
Main shaft (9) stagnant end, not with main axis.Dielectric induced line circle (1) is connected with producing the pulse power of certain frequency,
The voltage and current of change is produced in coil, certain electricity is produced in dielectric induced line circle (1) by electromagnetic induction principle
Kinetic potential and electric current, so as to which energy is transferred into receiving terminal from transmission end.Induction coil divides two parts, and a part is main electric spark
Upper electric coil A (2) is fixed on main shaft stationary part and is connected by series limiting resistor (4) with piece pole (3), and with lathe sheet
Body is grounded together, ensures that workpiece terminal potential is zero.A part is fixed on rotation handle of a knife for electric coil A (6) on secondary level electric spark
(16) rotary end, wherein positive terminal are connected on electrode (5), and negative pole end is connected into machine body by rotating handle of a knife (16) and connect
Ground.Ensure tool-electrode high potential, potential difference is now produced between electrode and workpiece, realizes that spark is put after gap is breakdown
Electricity.Scheme two, as shown in Fig. 2 the transformer coil designed by loose coupling formula, realizes the transfer of energy.The secondary level of scheme two
Electric coil B (9) is identical with scheme one as rotating part on electric spark, and stationary end is electric coil B (7) and arteries and veins on main electric spark
Rush power supply and be connected and realized by phase regulator (8) and differ the phase of half period with processing the pulse power, and by workpiece (3)
Ground connection.Potential difference is produced between electrode and piece pole by non-contact type electric energy import system, realizes electrical discharge machining.Figure
3 be the structure and scheme of installation of contactless electric spark electric energy import system.
Fig. 4 is double non-contact ultrasonic electric spark electric energy import system structure charts.Non-contact ultrasonic electric energy import system
Using vertical type structure, electric coil (12) is fixed on static main shaft (10) end, the upper electric coil of subordinate's ultrasound in higher level's ultrasound
(13) rotation handle of a knife (16) place is fixed on, ultrasonic vibration is done by ultrasonic amplitude transformer (17) tool-electrode (18).It is non-contact
Formula electric spark electric energy import system use inside and outside formula structure, electric coil (15) is fixed on static master on outside main electric spark
Axle (10) end, electric coil (14) is fixed on rotation handle of a knife (16) place on internal secondary level electric spark.Induced electromotive force one end leads to
Cross after rotating knife handle (16) joint is connected with machine body and be grounded, the other end is connected on tool-electrode (18).Utilize high magnetic conductance
The ferromagnetic material of rate makes radome interfering between armoured magnetic field.By inside and outside level coil, existed using the pulse power
The voltage and current of change is produced on main electric spark in electric coil (15), leakage field is prevented using different in nature magnetic core, passes through electromagnetism sense
Principle is answered, electric coil (14) produces induced electromotive force on secondary level electric spark, realizes that energy is transferred to receiving terminal from transmission end, keeps away
Traditional contact point is exempted from.Connect the electrodes at high potential and workpiece be connected at low potential, ensure tool-electrode (18) with
Potential difference between workpiece (22), realizes electrical discharge machining.Efficient electric energy can also be kept in handle of a knife high-speed rotation
Transmission.
Workpiece system is used for the functions such as the positioning clamping, cooling, accelerated corrosion exclusion of workpiece (22) in this embodiment,
Work nest (20) uses nonconducting organic plastics structure, is fixed on the working slider of horizontal location, fixture (21) passes through 3
Pressing plate and screw and work nest (20) are affixed, and the fixing end on fixture (21) is used for the positioning of workpiece (22), and mobile terminal is used for
The clamping of workpiece.Workpiece (22) is completely immersed in by working solution (19) by working solution inlet (32) into work nest (20), fixed
When pass through working solution liquid outlet (29) discharge.
Liquid system is divided into working fluid system and coolant system in this embodiment, and working fluid system goes out liquid process
It is that working solution (19) is drawn through into working solution liquid outlet (29) by the oil pump (28) on working solution casing (27) to enter working solution
Transmission adjusts flow velocity so as to flow into work nest (20) by regulating valve (30) in drain pipe (31)；Working fluid system returns liquid mistake
Journey is that the working solution (19) in work nest (20) is imported into working solution casing liquid return hole (25) by working solution liquid back pipe (24) to flow into
Self-filtering device (26) carries out filtration treatment, and the working solution (19) after processing can recycle.Coolant system goes out liquid
Process is to be imported coolant in temperature control box drain pipe (36) by temperature control box liquid outlet (34) by temperature control box (34) to be transferred to master
It is internal that axle inlet (39) enters main shaft (10)；The liquid process that goes out of coolant system is that main shaft liquid outlet (38) flows back coolant
It is interior into temperature control box (34) to enter to be transferred to temperature control box liquid return hole (35) in temperature control box liquid back pipe (37), so as to realize that coolant circulates
Cooling work.
Contactless electric spark electric energy import system utilizes mode of the brush directly to electricity due to eliminating on tool-electrode,
The high-speed rotation for due to electrode vibration caused by contact, realizing main shaft is eliminated, improves spindle rotation accuracy, is advantageous to further
Improve the precision of electrical discharge machining.The high speed rotation of tool-electrode can promote the chip removal of interpolar, increase material removing rate simultaneously
And electrode wear rate and surface roughness all decrease.Workpiece is realized by non-contact rotary ultrasound electric energy import system
Exciting a little, so as to improve the circulation of micro EDM working solution, make the abundant deionization in gap；Very big pressure between gap
Power change causes more effectively to discharge, and the metal more melted can be thus removed from arc crater, reduces heat affected layer, and heat is residual
Residue stress reduces, and micro-crack reduces, and then improves the pulse utilization rate and surface quality of electrical discharge machining.Different from current electricity
Spark machining energy supply mode, by the organic integration with non-contact ultrasonic system, it is expected to improving processing efficiency and table
Face integrality aspect makes a breakthrough, accomplish it is efficient take into account and balance with high-precision, to ultrasonic edm Compound Machining in micropore
Development in field is significant.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited by the embodiment above, described in the embodiment above and specification is to say
Bright principle of the invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible.
Claims (8)
- A kind of 1. contactless EDM System, it is characterised in that：Including contactless electrical discharge machining electric energy introgressive line Unite, separate structure inside and outside contactless electrical discharge machining electric energy import system use.
- 2. contactless EDM System according to claim 1, it is characterised in that：The contactless electric spark Electric energy import system includes electric coil on main electric spark, electric coil on secondary level electric spark, and main is installed in main shaft stagnant end Electric coil on electric spark, electric coil is connected with spark pulse power on main electric spark, and secondary level is installed in rotation shank end portion Electric coil on electric spark, electric coil is sequentially connected current-limiting resistance and electrode on secondary level electric spark, coil winding in pot core, There is gap between electric coil on major and minor level electric spark.
- 3. contactless EDM System according to claim 2, it is characterised in that：It is electric on the main electric spark Coil is connected by the phase adjustment phase with spark pulse power, realizes the phase that half period is differed with the processing pulse power.
- 4. contactless EDM System according to claim 1, it is characterised in that：The contactless electric spark The signal measurement of electric energy import system uses oscillograph.
- 5. contactless EDM System according to claim 1, it is characterised in that：Also include workpiece system, work Part system includes fixture, and workpiece is positioned by fixture and clamped, is completely immersed in work nest, workpiece is affixed with machine tool main body, inducts Electromotive force one end is connected and is grounded with machine body by rotating shank end portion, and it is zero to make piece pole current potential, another termination work Have electrode, produce electrical potential difference and carry out spark discharge processing.
- 6. contactless EDM System according to claim 1, it is characterised in that：Also include working solution cyclic system System.
- 7. contactless EDM System according to claim 1, it is characterised in that：Also include coolant cyclic system System.
- 8. contactless EDM System according to claim 1, it is characterised in that：Also include Ultrasonic machining system System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817202.9A CN107363350B (en) | 2017-09-12 | 2017-09-12 | Non-contact electric spark machining system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817202.9A CN107363350B (en) | 2017-09-12 | 2017-09-12 | Non-contact electric spark machining system |
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| CN107363350A true CN107363350A (en) | 2017-11-21 |
| CN107363350B CN107363350B (en) | 2023-07-18 |
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| CN201710817202.9A Active CN107363350B (en) | 2017-09-12 | 2017-09-12 | Non-contact electric spark machining system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098144A (en) * | 2021-04-02 | 2021-07-09 | 中车青岛四方机车车辆股份有限公司 | Distributed non-contact grounding backflow system and method and rail transit vehicle |
| CN114725748A (en) * | 2021-01-06 | 2022-07-08 | 通用电气公司 | Contact base for grounding ceramic elements during electrical discharge machining |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112727A (en) * | 2007-08-24 | 2008-01-30 | 清华大学 | Direct-current arc electric spark processing method |
| CN101185983A (en) * | 2007-11-26 | 2008-05-28 | 中国石油大学(华东) | Non-conducting material electric spark milling method |
| EP2669036A2 (en) * | 2012-05-31 | 2013-12-04 | General Electric Company | Hybrid electro-spark deposition and machining method and system |
| CN103817387A (en) * | 2014-03-07 | 2014-05-28 | 成都敏捷制造工程有限公司 | Aviation grille part EDM (electrical discharge machining) method and device thereof |
| CN104942384A (en) * | 2015-06-18 | 2015-09-30 | 沈阳理工大学 | Rotary main shaft device for micro electric spark machining machine |
| CN105215487A (en) * | 2015-10-23 | 2016-01-06 | 山东大学 | A kind of fine high-efficiency machining method towards non-conductive hard brittle material and device |
| RU2595085C1 (en) * | 2015-05-26 | 2016-08-20 | Федеральное государственное бюджетное научное учреждение "Всероссийский научно-исследовательский технологический институт ремонта и эксплуатации машино-тракторного парка" (ФГБНУ ГОСНИТИ) | Device for electric spark processing surfaces |
| CN207205478U (en) * | 2017-09-12 | 2018-04-10 | 天津科技大学 | Contactless EDM System |
-
2017
- 2017-09-12 CN CN201710817202.9A patent/CN107363350B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112727A (en) * | 2007-08-24 | 2008-01-30 | 清华大学 | Direct-current arc electric spark processing method |
| CN101185983A (en) * | 2007-11-26 | 2008-05-28 | 中国石油大学(华东) | Non-conducting material electric spark milling method |
| EP2669036A2 (en) * | 2012-05-31 | 2013-12-04 | General Electric Company | Hybrid electro-spark deposition and machining method and system |
| CN103817387A (en) * | 2014-03-07 | 2014-05-28 | 成都敏捷制造工程有限公司 | Aviation grille part EDM (electrical discharge machining) method and device thereof |
| RU2595085C1 (en) * | 2015-05-26 | 2016-08-20 | Федеральное государственное бюджетное научное учреждение "Всероссийский научно-исследовательский технологический институт ремонта и эксплуатации машино-тракторного парка" (ФГБНУ ГОСНИТИ) | Device for electric spark processing surfaces |
| CN104942384A (en) * | 2015-06-18 | 2015-09-30 | 沈阳理工大学 | Rotary main shaft device for micro electric spark machining machine |
| CN105215487A (en) * | 2015-10-23 | 2016-01-06 | 山东大学 | A kind of fine high-efficiency machining method towards non-conductive hard brittle material and device |
| CN207205478U (en) * | 2017-09-12 | 2018-04-10 | 天津科技大学 | Contactless EDM System |
Non-Patent Citations (1)
| Title |
|---|
| 冯光磊;杨晓冬;: "基于非接触给电的高主轴转速微细电火花加工特性研究" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725748A (en) * | 2021-01-06 | 2022-07-08 | 通用电气公司 | Contact base for grounding ceramic elements during electrical discharge machining |
| CN113098144A (en) * | 2021-04-02 | 2021-07-09 | 中车青岛四方机车车辆股份有限公司 | Distributed non-contact grounding backflow system and method and rail transit vehicle |
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| Publication number | Publication date |
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| CN107363350B (en) | 2023-07-18 |
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