CN108581100B - Inner passage ultrasonic vibration assists internal combustion electrochemical grinding system and method - Google Patents

Inner passage ultrasonic vibration assists internal combustion electrochemical grinding system and method Download PDF

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Publication number
CN108581100B
CN108581100B CN201810421830.XA CN201810421830A CN108581100B CN 108581100 B CN108581100 B CN 108581100B CN 201810421830 A CN201810421830 A CN 201810421830A CN 108581100 B CN108581100 B CN 108581100B
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internal combustion
ultrasonic vibration
bistrique
electrolyte
passage
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CN108581100A (en
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张建华
尹瀛月
刘勇
孔黄海
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Shandong University
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Shandong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H5/00Combined machining
    • B23H5/06Electrochemical machining combined with mechanical working, e.g. grinding or honing
    • B23H5/08Electrolytic grinding

Abstract

The invention discloses a kind of inner passage ultrasonic vibrations to assist internal combustion electrochemical grinding system and method, solves the problems, such as that processing efficiency is low for current deep hole, type chamber and inner passage, processing efficiency can be improved and reduce machined surface roughness.System specifically includes that motion control device, current detection controller, electrolyte circulation means, ultrasonic vibration apparatus and internal combustion tubular conductive bistrique.Motion control device realizes the stability of control main shaft high speed rotation and feeding;Size of current and control mutation current generate in current detection controller real-time detection process;Electrolyte circulation means realize the feed flow of electrolyte, filtering, recycling;Ultrasonic vibration apparatus realizes electrolyte under ultrasonic cavitation effect, and electrochemical reaction is strengthened in quick removal of the electric conducting grinding head to workpiece surface passivating film;Internal combustion tubular conductive bistrique avoids in process turbulence effect between bistrique and workpiece gap, and electrolyte flow field is kept to stablize.

Description

Inner passage ultrasonic vibration assists internal combustion electrochemical grinding system and method
Technical field
The present invention relates to deep hole, type chamber and inner passage electrochemical grinding processing technique fields, more particularly to a kind of inside Channel ultrasound vibration auxiliary internal combustion electrochemical grinding system and method.
Background technique
Titanium alloy, nickel base superalloy integrated member inner passage are manufactured for laser gain material in the high-end equipment of aerospace Surface roughness value is big, stress and the features such as heterogeneous microstructure changes in distribution is big and dimensional accuracy is poor, and traditional machinery adds Labour union causes work pieces process region to generate higher temperature and larger cutting force, reduces cutter life.Electrochemical grinding processing not by The limitation of the strength of materials, hardness and toughness, workpiece machining surface without residual stress.Since electricity can be generated between tool-electrode and workpiece It solves liquid turbulent phenomenon and causes gap flow field unstable, influence the finished surface precision and quality of inner passage.Add to improve Work surface accuracy must reduce the speed of mainshaft, rationally control the flow velocity and flow of electrolyte, and this method is only applicable to small lot and adds Work.
Therefore, a kind of inner passage ultrasonic vibration auxiliary internal combustion electrochemical grinding system or method need to be provided.
Summary of the invention
The present invention to solve the above-mentioned problems, proposes a kind of inner passage ultrasonic vibration auxiliary internal combustion electrochemical grinding system Electrolytic mill head rod portion is designed as tubulose, bistrique and is provided with different logical of pore size in corresponding position by system and method, the present invention Hole is distributed machining area even flow field, and electrolyte generates cavitation effect under ultrasonic vibration effect, and reinforced conductive bistrique is to work The removal of part surface passivated membrane makes the abrasive grain of passivation fall off in time, and pole clearance is avoided to generate spark discharge phenomenon, realizes deep The high efficiency Precision Machining in hole, type chamber and inner passage.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of inner passage ultrasonic vibration auxiliary internal combustion electrochemical grinding system, including motion control device, current detecting Control device, electrolyte circulation means, ultrasonic vibration apparatus and internal combustion tubular conductive bistrique, wherein the motion control Device is connected with main shaft, and drives main shaft rotation and move along x, y or z-axis;
It is provided with internal combustion tubular conductive bistrique on the main shaft, multiple through-holes are provided on electric conducting grinding head, processed Jet electrolytic liquid in journey keeps the electrolyte even flow field distribution in machining area;
The electrolyte circulation means recycle supply electrolyte, the current detecting control to internal combustion tubular conductive bistrique Size of current and prevent mutation current from generating in device real-time detection process;
The ultrasonic vibration apparatus applies ultrasonic cavitation effect to it during electric conducting grinding head jet electrolytic liquid, Workpiece surface passivating film is removed, strengthens electrochemical reaction, realization is to the deep hole of workpiece, the Precision Machining of type chamber and inner passage.
Further, the internal combustion tubular conductive bistrique, including hemispherical bistrique and connection bar portion, the connection bar portion Hole is opened to hemispherical bistrique in corresponding position, keeps machining area Flow Field Distribution uniform, is avoided spuious outside work pieces process region Corrosion.
Further, the connection bar portion is provided with liquid-passing hole, and the radial circumference region of through-hole and through-hole wall coat corrosion resistant Insulating coating is lost, contact by the upper surface and lower end surface installation dynamic seal ring of the outer cover being arranged outside connection bar portion close Envelope avoids the electrolyte extravasation of connection bar portion.
Further, the outer wall of the outer cover is provided with inlet opening, is provided with annular groove on inner wall, outer cover upper end respectively with Motor stator is connected with main shaft shell.
Further, bearing one is provided between the spindle rotor and outer cover.
Further, bearing two is provided between connection bar portion and the outer cover.
Further, the ultrasonic vibration installation includes the amplitude transformer connecting with connecting rod subordinate end, the amplitude transformer with Ultrasonic transducer connection, ultrasonic transducer are connect with supersonic generator, AC power source by conducting wire.
Further, the current detection controller is connect with electrolytic mill head rod, the motion control device and realization Spindle swivel feeding moves the connection of X, Y, Z moving mass.
Further, the electrolysis cycle device is connect with outer cover liquid injection hole and electrolytic cell, is turned by industrial personal computer to main shaft Speed, feed speed, Faradaic current, decomposition voltage ultrasonic vibration frequency and amplitude are controlled, and realize that deep hole, type chamber and inside are logical Road high-precision and efficient electrochemical grinding.
Further, the outer cover and applying coating are erosion resisting insulation material.
Based on the processing method of above-mentioned inner passage ultrasonic vibration auxiliary internal combustion electrochemical grinding system, including following step It is rapid:
1) workpiece to be processed installation is fixed on fixture;
2) determine that internal combustion tubular conductive bistrique is moved with spindle rotor swivel feeding relation of following up, main shaft along x, y and z axes Relation of following up;
3) AC power source is connected, the vibration frequency of ultrasonic vibration apparatus is adjusted according to determining swivel feeding relation of following up Rate, the feed speed of amplitude and main shaft, revolving speed and internal combustion tubular conductive bistrique revolving speed, at the same detect control electrolyte electric current, Voltage swing and uninterrupted are distributed machining area even flow field, and electrolyte generates cavitation effect under ultrasonic vibration effect, Reinforced conductive bistrique to the removal of workpiece surface passivating film, so that the abrasive grain of passivation is fallen off in time, avoid pole clearance from generating electrical fire Flower electric discharge phenomena, realize the high efficiency Precision Machining of deep hole, type chamber and inner passage.
Compared with prior art, the invention has the benefit that
1) present invention realizes the infusion of electrolyte internal combustion, more by the design to catholyte bistrique bar portion and bistrique It is insufficient to have mended existing hydrojet mode, has eliminated the design of outer spray apparatus and nozzle, rationally controlling for flow velocity, flow, which can guarantee, adds The electrolyte flow field in work area domain is more uniform, is more suitable for the highly-efficient processing of the inner passages such as deep hole, type chamber.
2) present invention makes electrolyte generate cavitation by the way that ultrasonic vibration installation is arranged, and the abrasive grain of passivation and electrolysis are produced Object timely updates, and improves bistrique to the rate of dissolution of passivating film, further increases machining accuracy and processing efficiency.
3) whole system device, structure is simple, easy to operate, can real-time monitoring electrolyte flow rate, flow, ultrasonic vibration frequency Rate, amplitude, the speed of mainshaft and feed speed can be realized the processing of the peculiar parts high-efficiency and precisions such as deep hole, type chamber and inner passage.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is Machining System apparatus structure schematic diagram of the present invention
Fig. 2 is present invention processing part-structure schematic diagram
Fig. 3 is Machining System device electric conducting grinding head structural schematic diagram of the present invention
In figure, 1. columns, the direction 2.X moving mass, the direction 3.Y moving mass, 4. conducting wires, the direction 5.Z moving mass, 6. industry controls Machine, 7. motion control cards, 8. main shafts, 9. energy converters, 10. supersonic generators, 11. AC power sources, the acquisition of 12. current signals Card, 13. amplitude transformers, 14. internal combustion tubular conductive bistriques, 15. electrolytic cells, 16. DC power supplies, 17. workpiece, 18. fixtures, 20. electrolyte of 19.X-Y workbench, 21. pumps, 22. Hall current sensors, 23. servo valves, 24 plastic tubes, 25. brushes, 26. Motor stator, 27. main shaft shells, 28. bolts, 29. outer covers, 30. spindle rotors, 31. bearings one, 32. dynamic seal rings, 33. axis Hold two, 34. end caps;
Specific embodiment:
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ", The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection, It is also possible to be integrally connected or is detachably connected;It can be directly connected, it can also be indirectly connected through an intermediary.For The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be, It is not considered as limiting the invention.
As shown in Figure 1, a kind of inner passage ultrasonic vibration assists internal combustion electrochemical grinding system, comprising: column 1, X-direction Moving mass 2, conducting wire 4, Z-direction moving mass 5, industrial personal computer 6, motion control card 7, main shaft 8, energy converter 9, surpasses Y-direction moving mass 3 It is sonic generator 10, AC power source 11, current signal capture card 12, amplitude transformer 13, tubular conductive bistrique 14, electrolytic cell 15, straight Galvanic electricity source 16, workpiece 17, fixture 18, X-Y table 19, electrolyte 20, pump 21, Hall current sensor 22, servo valve 23, modeling Expects pipe 24, brush 25.Wherein, X-Y table 19 is set on column 1, and the top of X-Y table 19 is respectively arranged with X-direction fortune Motion block 2, Y-direction moving mass 3 and Z-direction moving mass 5, the movement in the direction x, y and z for controlling and driving main shaft 8.X-Y 19 upper surface of workbench is provided with electrolytic cell 15, and fixture 18,18 clamping workpiece 17 of fixture are accommodated in electrolytic cell 15.On main shaft 8 It is provided with energy converter 9, energy converter 9 connects supersonic generator 10 by conducting wire 4, and supersonic generator 10 connects AC power source 11。
Be provided with tubular conductive bistrique 14 on main shaft 8, tubular conductive bistrique 14 by brush 25 connect DC power supply 16 with Hall current sensor 22.Electrolyte 20 in electrolytic cell 15 is recycled by pump 21, servo valve 23, is back flowed back into tubulose and is led Electric grinder 14.
Tubular conductive bistrique 14, energy converter 9, amplitude transformer 13 and 8 servo rotary feed motion of main shaft are all transmitted by industrial personal computer 6 Signal is controlled to motion control card 7;
Internal combustion tubular conductive bistrique 14 is connect with amplitude transformer 13, energy converter 9 and amplitude transformer 13 by with spindle rotor 29 Connection, energy converter 9 connects supersonic generator 10, AC power source 11 by conducting wire 4, axial in tubular conductive bistrique 14 bar portion Under ultrasonic vibration effect, machining area electrolyte 20 generates cavitation, can timely update and be passivated abrasive grain, improves tube-shaped electrolyte mill The rate of dissolution of first 14 pairs of passivating films further improves work pieces process efficiency.
14 cylindrical rod section of tube-shaped electrolyte bistrique connects 16 cathode of DC power supply by conducting wire 4, and workpiece 17 is by conducting wire 4 and directly The 16 anode connection of galvanic electricity source, 29 outer wall through-hole of outer cover connect electrolyte circulation means by corrosion-resistant plastic pipe 24 and servo valve 23 Electrolytic cell 15.
14 bar portion of tube-shaped electrolyte bistrique connects Hall current sensor 22 and current signal capture card 12 by conducting wire 4, will Analog signal transmission controls Faradaic current, voltage to industrial personal computer 6.
As shown in Fig. 2, 29 upper end of outer cover of main shaft 8 is connect by bolt 28 with motor stator 26, with one 30 outer ring of bearing Contact, lower end are contacted with 2 33 outer ring of bearing, and 2 33 bottom end of bearing is contacted with end cap 34.Dynamic seal ring 32 respectively with 29 ring of outer cover The contact of shape slot upper and lower end face, avoids electrolyte from exosmosing.29 upper end through-hole of outer cover and annular groove center line and internal combustion tubular conductive 14 bar portion through hole center line of bistrique is consistent, and can be realized the internal combustion tubular conductive mill that flow of electrolyte stablizes injection rotation It is intracavitary in first 14 bar portion, it compensates for electrolyte and spurts mode deficiency, be conducive to stablizing for electrolyte flow field and formed.
Inner passage ultrasonic vibration assists internal combustion electrochemical grinding system and device outer cover 28 and applying coating for six sides nitridation Boron.
As shown in figure 3, electrolytic mill head rod portion is designed as tubulose, in order to avoid flow field turbulence effect, by electrolysis bistrique circle Mast portion is designed as internal combustion tubulose and opens hole to hemispherical bistrique in corresponding position, keeps machining area Flow Field Distribution uniform, Avoid the dispersion corrosion outside work pieces process region.
Electrolyte generates cavitation effect under ultrasonic vibration effect, and reinforced conductive bistrique removes workpiece surface passivating film It removes, the abrasive grain of passivation is made to fall off in time, the residual products such as the abrasive grain for being scattered in pole clearance are excluded in time, avoid pole clearance Spark discharge phenomenon is generated, realizes the high efficiency Precision Machining of deep hole, type chamber and inner passage.
Above-mentioned apparatus realizes the movement of tubular conductive bistrique swivel feeding to the control of main shaft 7 by industrial personal computer 6, passes through adjusting The principal elements such as electrochemical grinding electric current, ultrasonic vibration frequency, amplitude, the speed of mainshaft realize that workpiece 17 is high-accuracy, efficient super The processing of sound and vibration dynamic auxiliary internal combustion electrochemical grinding.
In the typical embodiment of another kind of the application, a kind of deep hole, type chamber and inner passage processing method are provided, This method assists internal combustion electrochemical grinding system processing equipment using above-mentioned ultrasonic vibration.
The step of above-mentioned processing method, is as follows:
Workpiece to be processed installation is fixed on fixture;
Internal combustion tubular conductive bistrique and spindle rotor swivel feeding are kept into servo rotary feeding relation, main shaft and XYZ Moving mass relation of following up imported into industrial personal computer;
AC power source is connected, industrial personal computer adjusts the vibration of ultrasonic vibration apparatus according to the swivel feeding relation of following up of setting Frequency, the feed speed of amplitude and main shaft, revolving speed and internal combustion tubular conductive bistrique revolving speed, while detecting control electrolyte electricity Stream, voltage swing and uninterrupted, realize deep hole, type chamber, inner passage high-precision finished machined.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.

Claims (6)

1. a kind of inner passage ultrasonic vibration assists internal combustion electrochemical grinding system, it is characterized in that: including motion control device, electricity Flow detection control apparatus, electrolyte circulation means, ultrasonic vibration apparatus and internal combustion tubular conductive bistrique, wherein the fortune Dynamic control device is connected with main shaft, and drives main shaft rotation and move along x, y or z-axis;Internal combustion pipe is provided on the main shaft Shape electric conducting grinding head is provided with multiple through-holes on electric conducting grinding head, in process jet electrolytic liquid, keeps the electricity in machining area Xie Yeliuchang is uniformly distributed;The electrolyte circulation means recycle supply electrolyte, the electricity to internal combustion tubular conductive bistrique It flows size of current in detection control apparatus real-time detection process and prevents mutation current from generating;The ultrasonic vibration apparatus Apply ultrasonic cavitation effect to it during electric conducting grinding head jet electrolytic liquid, remove workpiece surface passivating film, strengthens electricity Chemical reaction, realization is to the deep hole of workpiece, the Precision Machining of type chamber and inner passage;
The internal combustion tubular conductive bistrique, including hemispherical bistrique and connection bar portion, the connection bar portion is in corresponding position pair Hemispherical bistrique opens hole, keeps machining area Flow Field Distribution uniform, avoids the dispersion corrosion outside work pieces process region;
The ultrasonic vibration installation includes the amplitude transformer connecting with connecting rod subordinate end, and the amplitude transformer and ultrasonic transducer connect It connects, ultrasonic transducer is connect with supersonic generator, AC power source by conducting wire;
The connection bar portion is provided with liquid-passing hole, and the radial circumference region of through-hole and through-hole wall coat erosion resisting insulation coating, lead to The upper surface and lower end surface installation dynamic seal ring for crossing the outer cover being arranged outside connection bar portion carry out contact sealing, avoid connecting rod The electrolyte in portion exosmoses;
The outer wall of the outer cover is provided with inlet opening, is provided with annular groove on inner wall, outer cover upper end respectively with motor stator and main shaft Cage connection;Outer cover upper end through-hole and annular groove center line and internal combustion tubular conductive bistrique bar portion through hole center line keep one It causes.
2. a kind of inner passage ultrasonic vibration as described in claim 1 assists internal combustion electrochemical grinding system, it is characterized in that: main Bearing one is provided between axis rotor and outer cover.
3. a kind of inner passage ultrasonic vibration as described in claim 1 assists internal combustion electrochemical grinding system, it is characterized in that: institute It states and is provided with bearing two between connection bar portion and outer cover.
4. a kind of inner passage ultrasonic vibration as described in claim 1 assists internal combustion electrochemical grinding system, it is characterized in that: institute It states electrolyte circulation means to connect with outer cover liquid injection hole and electrolytic cell, by industrial personal computer to the speed of mainshaft, feed speed, electrolysis electricity Stream, decomposition voltage ultrasonic vibration frequency and amplitude are controlled, and realize that deep hole, type chamber and inner passage are in high precision and efficient Electrochemical grinding.
5. a kind of inner passage ultrasonic vibration as described in claim 1 assists internal combustion electrochemical grinding system, it is characterized in that: institute The outer cover and applying coating material stated are the hexagonal boron nitride of erosion resisting insulation.
6. based on inner passage ultrasonic vibration according to any one of claims 1 to 5 auxiliary internal combustion electrochemical grinding system Processing method, it is characterized in that: the following steps are included:
1) workpiece to be processed installation is fixed on fixture;
2) determine internal combustion tubular conductive bistrique and spindle rotor swivel feeding relation of following up, main shaft along x, y and z axes move with Dynamic relationship;
3) AC power source is connected, vibration frequency, the vibration of ultrasonic vibration apparatus are adjusted according to determining swivel feeding relation of following up The feed speed of width and main shaft, revolving speed and internal combustion tubular conductive bistrique revolving speed, while it is big to detect control electrolyte electric current, voltage Small and uninterrupted is distributed machining area even flow field, and electrolyte generates cavitation effect under ultrasonic vibration effect, and reinforcing is led Electric grinder to the removal of workpiece surface passivating film, so that the abrasive grain of passivation is fallen off in time, avoid pole clearance from generating spark discharge Phenomenon realizes the high efficiency Precision Machining of deep hole, type chamber and inner passage.
CN201810421830.XA 2018-05-04 2018-05-04 Inner passage ultrasonic vibration assists internal combustion electrochemical grinding system and method Active CN108581100B (en)

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