CN109226914B - Cathode for free-form surface cavity electrolytic machining - Google Patents

Cathode for free-form surface cavity electrolytic machining Download PDF

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Publication number
CN109226914B
CN109226914B CN201811238692.8A CN201811238692A CN109226914B CN 109226914 B CN109226914 B CN 109226914B CN 201811238692 A CN201811238692 A CN 201811238692A CN 109226914 B CN109226914 B CN 109226914B
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China
Prior art keywords
cathode
free
channel
cavity
workpiece
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CN201811238692.8A
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CN109226914A (en
Inventor
徐红丽
干为民
尹飞鸿
胡少刚
徐波
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Changzhou Institute of Technology
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Changzhou Institute of Technology
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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
    • B23H3/00Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/04Electrodes specially adapted therefor or their manufacture

Abstract

The invention discloses a cathode for free-form surface cavity electrolytic machining, which comprises a cathode body and a cathode head, wherein an electrolyte inflow channel is arranged in the cathode body, a liquid inlet inflow channel and a liquid outlet outflow channel are arranged on the cathode head, one end of the liquid inlet inflow channel is communicated with the electrolyte inflow channel, the other end of the liquid inlet inflow channel is communicated with a workpiece, one end of the liquid outlet outflow channel is communicated with the workpiece, and the other end of the liquid outlet outflow channel is led out from the side surface of the cathode head above the workpiece. The free-form surface includes protruding portion and recessed portion, the feed liquor inflow passageway sets up in free-form surface's protruding portion, go out the liquid outflow passageway and set up in free-form surface's recessed portion. The cathode for the free-form surface cavity electrolytic machining can realize the inflow and outflow of electrolyte at the same time, ensure the integrity of a flow field, effectively eliminate a dead water region in a machining gap and prevent a short circuit phenomenon caused by unsmooth flow field.

Description

Cathode for free-form surface cavity electrolytic machining
Technical Field
The invention relates to a cathode structure, in particular to a cathode for free-form surface cavity electrolytic machining.
Background
Chinese utility model patent with publication number CN 206887238U discloses an prevent ageing electrolysis trough cathode cage of rubber sleeve, prevent ageing electrolysis trough cathode cage of rubber sleeve includes many stainless steel billet and is used for installing the negative pole handle of stainless steel billet and is used for insulating rubber sleeve, its characterized in that: the squirrel-cage type steel wire rope is characterized in that a plurality of stainless steel bars are combined into a squirrel-cage type structure, the insulating sleeve is provided with a lining piece, the lining piece is of a revolving body structure with a through hole in the middle and a T-shaped cross section, and the bottom of the lining piece is matched with the rubber sleeve. The utility model discloses an establish an interior welt that adopts the tetrafluoro pipe fitting to make in the rubber sleeve, the welt is better to have and prevents high temperature, anticorrosion, insulating properties, prolongs the life of rubber sleeve, reduces the short circuit phenomenon among the electrolysis process.
In the existing electrolytic machining process, a dead water area often exists in a machining part gap, so that a flow field is incomplete, and the short circuit phenomenon is caused due to unsmooth flow field.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a cathode for free-form surface cavity electrolytic machining.
The invention is realized by adopting the following technical scheme:
the utility model provides a free-form surface die cavity is negative pole for electrolytic machining, includes negative pole body and negative pole head, this internal electrolyte inflow channel that is provided with of negative pole, overhead feed liquor inflow channel and the play liquid outflow passageway of being provided with of negative pole, the feed liquor inflow channel one end with electrolyte inflow channel is linked together, and the other end leads to the work piece, the one end of going out liquid outflow passageway leads to the work piece, and the other end is drawn forth from the side of negative pole head above the work piece.
Furthermore, the liquid outlet channel is L-shaped.
Furthermore, a sealing ring is arranged between the cathode body and the cathode head.
Furthermore, the liquid inlet channel and the liquid outlet channel are arranged in parallel.
Furthermore, a pressure maintaining ring is fixedly arranged on the workpiece, the lower part of the cathode head is fastened in the pressure maintaining ring, the liquid outlet channel is led out from the side wall of the cathode head at the upper part of the pressure maintaining ring, and a machining gap is reserved between the lower end of the cathode head and the workpiece.
Still further, the pressure-retaining ring is a non-conductive material with strength, and comprises plastics, ceramics and polytetrafluoroethylene.
Further, the electrolyte flows in and out simultaneously in the cathode tabs.
Furthermore, the free-form surface comprises a protruding portion and a recessed portion, the liquid inlet inflow channel is arranged on the protruding portion of the free-form surface, and the liquid outlet outflow channel is arranged on the recessed portion of the free-form surface.
The invention has the following beneficial effects:
the cathode for the free-form surface cavity electrolytic machining can realize the inflow and outflow of electrolyte at the same time, ensure the integrity of a flow field, effectively eliminate a dead water region in a machining gap and prevent a short circuit phenomenon caused by unsmooth flow field.
Drawings
FIG. 1 is a view showing the appearance of a cathode for free-form surface cavity electrolytic machining according to the present invention;
FIG. 2 is a sectional view of the cathode for free-form surface cavity electrolytic machining of the present invention;
FIG. 3 is a top view block diagram of FIG. 1;
FIG. 4 is a view showing the appearance of a cathode head;
FIG. 5 is a sectional structural view of a cathode head;
FIG. 6 is a top view block diagram of FIG. 4;
FIG. 7 is a simplified schematic view of a cathode body;
fig. 8 is a working principle diagram of the present invention.
In the figure: 1. a cathode head; 101. an effluent outflow channel; 102. a liquid inlet and outlet channel; 2. a cathode body; 201. a machine tool clamping part; 202. an electrolyte inflow channel; 3. a seal ring; 4. a bolt; 5. and (5) a voltage-maintaining ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a free-form surface cavity cathode for electrolytic machining, which aims to solve the problems that in the existing electrolytic machining process, dead water areas often exist in gaps of machined parts, so that the flow field is incomplete, and the short circuit phenomenon is caused due to unsmooth flow field. The working principle diagram of the invention is shown in fig. 8.
The cathode for the free-form surface cavity electrolytic machining can realize the inflow and outflow of electrolyte at the same time, ensure the integrity of a flow field, effectively eliminate a dead water region in a machining gap and prevent a short circuit phenomenon caused by unsmooth flow field.
Example one
This example provides a free-form surface cavity electrolytic machining cathode as shown in fig. 1 to 3, comprising a cathode body 2 and a cathode head 1. The structure of the cathode head 1 is shown in fig. 4 to 6, and the structure of the cathode body 2 is shown in fig. 7. An electrolyte inflow channel 202 is arranged in the cathode body 2, a liquid inlet inflow channel 102 and a liquid outlet outflow channel 101 are arranged on the cathode head 1, one end of the liquid inlet inflow channel 102 is communicated with the electrolyte inflow channel 202, the other end of the liquid inlet inflow channel is communicated with the workpiece 4, one end of the liquid outlet outflow channel 101 is communicated with the workpiece 4, and the other end of the liquid outlet outflow channel is led out from the side face of the cathode head 1 above the workpiece 4. The inlet flow channel 102 and the outlet flow channel 101 may be arranged in parallel.
The present invention is not particularly limited to the specific structure of the outlet liquid outflow channel 101, and is preferably in an L shape as shown in fig. 2. One end of the L-shaped liquid outlet channel 101 is communicated with the workpiece 4, and the other end is led out from the upper side wall of the cathode head.
In order to enhance the sealing between the cathode body and the cathode head, a sealing ring 3 may be provided between the cathode body 2 and the cathode head 1.
Preferably, a pressure maintaining ring is fixedly arranged on the workpiece, the lower part of the cathode head is fastened in the pressure maintaining ring, the liquid outlet channel is led out from the side wall of the cathode head at the upper part of the pressure maintaining ring, and a machining gap is reserved between the lower end of the cathode head and the workpiece. The pressure-maintaining ring is made of a non-conductive material with certain strength, such as plastic, ceramic, polytetrafluoroethylene and the like, is fixed on a workpiece during machining and is used for ensuring a flow field, namely, the whole machining gap is ensured not to be lack of liquid, and electrolyte in the machining gap keeps certain pressure.
Furthermore, the free-form surface comprises a protruding portion and a recessed portion, the liquid inlet inflow channel is arranged on the protruding portion of the free-form surface, and the liquid outlet outflow channel is arranged on the recessed portion of the free-form surface.
In conclusion, the cathode for free-form surface cavity electrolytic machining can realize the inflow and outflow of electrolyte at the same time, ensure the integrity of a flow field, effectively eliminate a dead water region in a machining gap and prevent a short circuit phenomenon caused by unsmooth flow field.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a free-form surface die cavity negative pole for electrolytic machining, includes negative pole body and negative pole head, this internal electrolyte inflow channel that is provided with of negative pole, its characterized in that: a liquid inlet channel and a liquid outlet channel are arranged on the cathode head, one end of the liquid inlet channel is communicated with the electrolyte inlet channel, the other end of the liquid inlet channel is communicated with the workpiece, one end of the liquid outlet channel is communicated with the workpiece, and the other end of the liquid outlet channel is led out from the side surface of the cathode head above the workpiece; the workpiece is fixedly provided with a pressure maintaining ring, the lower part of the cathode head is fastened in the pressure maintaining ring, the liquid outlet channel is led out from the side wall of the cathode head at the upper part of the pressure maintaining ring, and a machining gap is reserved between the lower end of the cathode head and the workpiece.
2. The cathode for free-form surface cavity electrochemical machining according to claim 1, characterized in that: the liquid outlet channel is L-shaped.
3. The cathode for free-form surface cavity electrochemical machining according to claim 1, characterized in that: and a sealing ring is arranged between the cathode body and the cathode head.
4. The cathode for free-form surface cavity electrochemical machining according to claim 1, characterized in that: the liquid inlet inflow channel and the liquid outlet outflow channel are arranged in parallel.
5. The cathode for free-form surface cavity electrochemical machining according to claim 1, characterized in that: the pressure-retaining ring is made of a non-conductive material with strength, and comprises plastics, ceramics and polytetrafluoroethylene.
6. The cathode for free-form surface cavity electrochemical machining according to claim 1, characterized in that: electrolyte flows in and out simultaneously in the cathode head.
7. The cathode for free-form surface cavity electrochemical machining according to claim 1, characterized in that: the free-form surface includes protruding portion and recessed portion, the feed liquor inflow passageway sets up in free-form surface's protruding portion, go out the liquid outflow passageway and set up in free-form surface's recessed portion.
CN201811238692.8A 2018-10-23 2018-10-23 Cathode for free-form surface cavity electrolytic machining Active CN109226914B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811238692.8A CN109226914B (en) 2018-10-23 2018-10-23 Cathode for free-form surface cavity electrolytic machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811238692.8A CN109226914B (en) 2018-10-23 2018-10-23 Cathode for free-form surface cavity electrolytic machining

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CN109226914A CN109226914A (en) 2019-01-18
CN109226914B true CN109226914B (en) 2020-04-28

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CN109332826B (en) * 2018-10-23 2020-10-16 广东工业大学 Novel electrolytic milling method and device for direct injection machining gap with electrolyte adhered to wall
TWI720442B (en) * 2019-03-20 2021-03-01 財團法人金屬工業研究發展中心 Electrochemical processing device of enclosed vane
CN110814452B (en) * 2019-11-15 2020-12-18 合肥工业大学 Electrolytic machining device for tooth surface staggered grooves
CN111690970A (en) * 2020-06-10 2020-09-22 上海宝敦金属表面处理厂(普通合伙) Valve body local anodic oxidation method

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GB1108937A (en) * 1964-06-11 1968-04-10 Ass Eng Ltd Improvements in electrochemical machining
FR2381595A1 (en) * 1977-02-24 1978-09-22 Centre Techn Ind Mecanique ELECTROCHEMICAL MACHINING PROCESS
SU1158320A1 (en) * 1982-09-02 1985-05-30 Московское Особое Конструкторское Бюро Средств Автоматизации И Контроля И Электроэрозионного Оборудования Electrochemical marking method
US20050274625A1 (en) * 2004-06-14 2005-12-15 Frederick Joslin Apparatus and method for white layer and recast removal
CN203944957U (en) * 2014-07-04 2014-11-19 西安工业大学 A kind of special-shaped thin wall curved surface part electrolytic machining device
CN105312691B (en) * 2015-11-06 2018-07-24 山东理工大学 A method of eliminating pipe electrode interelectrode gap flow field vortex
CN106903384B (en) * 2017-04-14 2018-08-28 南京航空航天大学 Multicarity baffle-type is electrolysed milling combined machining method
CN107225299B (en) * 2017-05-03 2018-11-09 南京航空航天大学 Two-tube collapsible tool cathode and its electrolysis milling combined machining method
CN107096970B (en) * 2017-06-19 2018-10-16 南京航空航天大学 Gas-insulated protects jacking Electrolyzed Processing cathod system and processing method
CN107378154A (en) * 2017-07-18 2017-11-24 青岛科技大学 A kind of Multifunction expanding tool-electrode for Electrolyzed Processing hole
CN108115235B (en) * 2018-01-31 2019-05-07 西安工业大学 A kind of tool cathode for metal material electrolysis shaping

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