CN114571018A - Method and device for electrolytically cutting by axially scouring mixed gas electrolyte to auxiliary tube electrode and radially scouring electrolyte - Google Patents
Method and device for electrolytically cutting by axially scouring mixed gas electrolyte to auxiliary tube electrode and radially scouring electrolyte Download PDFInfo
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- CN114571018A CN114571018A CN202210367947.0A CN202210367947A CN114571018A CN 114571018 A CN114571018 A CN 114571018A CN 202210367947 A CN202210367947 A CN 202210367947A CN 114571018 A CN114571018 A CN 114571018A
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009991 scouring Methods 0.000 title description 10
- 238000011010 flushing procedure Methods 0.000 claims abstract description 27
- 238000003754 machining Methods 0.000 claims abstract description 27
- 239000002699 waste material Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 239000007921 spray Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/10—Supply or regeneration of working media
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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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
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- 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)
Abstract
The invention relates to a radial flushing electrolytic cutting method and a radial flushing electrolytic cutting device for an auxiliary tube electrode axially flushed by mixed gas electrolyte. The three-way nozzle is utilized to spray gas-mixed electrolyte in the processed cutting seam along the axial direction of the tube electrode, so that the problem of inconsistent surface quality of the upper part and the lower part of the side wall of the cutting seam caused by less electrolyte at the upper part and more electrolyte at the lower part in the long and narrow cutting seam is solved; the mixed gas electrolyte restrains the waste electrolyte flowing into the joint from the front end machining gap into a liquid bundle, so that the secondary electrolytic corrosion range of the waste electrolyte on the side wall of the joint is reduced; the gas-mixed electrolyte contains a large amount of gas which rushes into the cutting seams to form a large amount of bubbles, so that the conductivity of the electrolyte is reduced, and the secondary electrolytic corrosion degree to the side walls of the cutting seams is reduced. The method realizes high-quality electrolytic cutting processing of the large-thickness ruled surface structure.
Description
Technical Field
The invention relates to a radial flushing electrolytic cutting method and device for an auxiliary tube electrode axially flushed by mixed gas electrolyte, and belongs to the technical field of electrochemical machining.
Background
The processing method is to use a hollow metal tube with a plurality of jet holes on the side wall as a tool electrode and to use the radial jet of electrolyte to perform the electrolytic cutting on the workpiece. In the machining process, electrolyte is directly sprayed into the front end machining gap through a plurality of jet holes in the side wall of the tube electrode to participate in electrolytic reaction, and an electrolytic product is quickly flushed out. The method obviously improves the processing efficiency of electrolytic cutting and the capability of processing the large-thickness workpiece, and realizes the high-efficiency electrolytic cutting processing of the large-thickness ruled surface structure.
However, the radial porous electrolyte-flushing electrolytic cutting processing quality of the tube electrode is poor, and the quality is mainly shown in the following steps: when a large-thickness workpiece is cut, the width of the cutting seam is not uniform from top to bottom, the stray corrosion of the side wall of the cutting seam is serious, and the surface quality of the upper part and the lower part is inconsistent. This is because: in the process of the radial porous liquid flushing electrolytic cutting machining of the tube electrode, electrolyte is radially sprayed to a front end machining gap through a plurality of jet holes in the side wall of the tube electrode, participates in the completion of electrolytic reaction, flows back to the machined kerf along the gap between the outer wall of the tube electrode and the side wall of the kerf, and finally flows out from the lower end of the kerf under the action of gravity. The flow velocity of the waste electrolyte containing the electrolysis products in the long and narrow slits is slow, and a large amount of waste electrolyte stays in the slits, so that the side walls of the machined slits are corroded by secondary electrolysis. In addition, the distribution of the waste electrolyte in the cutting seams is different, the waste electrolyte is distributed on the upper parts of the cutting seams in a small amount, and the waste electrolyte is distributed on the lower parts of the cutting seams in a large amount, so that the stray corrosion degree of the upper parts and the lower parts of the side walls of the cutting seams are light, the stray corrosion degree of the lower parts of the side walls of the cutting seams is heavy, and the problems that the widths of the cutting seams are not uniform from top to bottom and the surface quality of the upper parts and the lower parts of the side walls is inconsistent occur.
How to improve the quality of the radial porous flushing electrolytic cutting processing of the tube electrode and realize the high-quality and high-efficiency cutting processing of the large-thickness ruled surface structure still remains the problem which needs to be solved at present.
Disclosure of Invention
The invention provides a method and a device for assisting in axially scouring and electrolytically cutting a pipe electrode by mixed gas electrolyte to solve the problems of inconsistent upper and lower widths of a cutting seam, poor side wall surface quality and the like when a large-thickness ruled surface structure is electrolytically cut by radial porous scouring of the pipe electrode.
In the method, during the process of electrolytically cutting a large-thickness ruled surface structure by axially scouring the auxiliary tube electrode with the mixed gas electrolyte, the electrolyte is radially sprayed into a front-end machining gap through a plurality of jet holes on the side wall of the tube electrode, rapidly participates in electrolytic reaction, cuts and processes a workpiece, brushes out an electrolytic product in the front-end machining gap, and then flows into the machined cutting seam through the gap between the tube electrode and the side wall of the cutting seam. Meanwhile, gas-mixed electrolyte is axially sprayed into the machined cutting seam along the tube electrode, so that the electrolyte flow of the upper part and the lower part of the long and narrow cutting seam is the same, and the problem of inconsistent surface quality of the upper part and the lower part of the side wall of the cutting seam caused by nonuniform electrolyte flow distribution in the long and narrow cutting seam is solved; a large amount of mixed gas electrolyte restrains the waste electrolyte flowing into the joint from the front end machining gap into a liquid beam, and the secondary electrolytic corrosion range of the waste electrolyte on the side wall of the joint is reduced; the gas-mixed electrolyte contains a large amount of gas, and a large amount of bubbles are formed when the gas-mixed electrolyte rushes into the cutting seam, so that the conductivity of the electrolyte is reduced, the secondary electrolytic corrosion degree to the side wall of the cutting seam is reduced, and the electrolytic cutting processing quality is improved.
The pressure of the mixed gas electrolyte which is axially sprayed into the cutting seam along the tube electrode is lower than that of the electrolyte which is radially sprayed into the front end machining gap along the tube electrode, so that the mixed gas electrolyte which is axially sprayed cannot influence the flow field in the front end machining gap, and the electrolytic cutting machining efficiency is ensured.
According to the radial liquid flushing electrolytic cutting method for the auxiliary pipe electrode axially flushed by the gas-mixed electrolyte, the flow of the gas-mixed electrolyte which is axially sprayed into the cutting seam along the pipe electrode is larger than the flow of the electrolyte which is radially sprayed into the front end machining gap along the pipe electrode, so that the waste electrolyte which flows into the cutting seam from the front end machining gap is bound by the axially sprayed gas-mixed electrolyte, and the waste electrolyte is quickly flushed out of the long and narrow cutting seam.
The radial flushing electrolytic cutting device mainly comprises a cathode clamp body, a motor, a rotary adapter, a three-way nozzle, a tube electrode and a workpiece. The cathode clamp body comprises a vertical support, and the vertical support is sequentially provided with an upper support, a middle support and a lower support from top to bottom. The motor and the joint are arranged on the surface of the upper bracket, and the three-way type nozzle is arranged in the middle bracket. The upper end of the tube electrode is connected to the rotary adapter, the middle part of the tube electrode penetrates through the tee-joint nozzle and is coaxial with the nozzle, and the lower end of the tube electrode is arranged in the lower support. During the electrolytic cutting processing, the electrolyte enters the inner cavity of the tube electrode through the rotary adapter and is radially sprayed into the front end processing gap from a plurality of jet holes on the side wall of the tube electrode; the mixed gas electrolyte enters from the transverse inlet of the three-way nozzle, is sprayed out from the lower nozzle and rushes into the machined cutting seam. The upper end of the three-way nozzle is provided with a water stop plug to prevent the mixed gas electrolyte from being sprayed out from the upper end. The numerical control machine tool controls the relative feeding motion between the tube electrode and the workpiece to complete the cutting processing of the workpiece; the motor drives the tube electrode to rotate rapidly through the gear, and steering cutting processing is completed.
The invention has the beneficial effects that:
1. according to the radial liquid-flushing electrolytic cutting method for the auxiliary pipe electrode by axial scouring of the gas-mixed electrolyte, in the machining process, the gas-mixed electrolyte is quickly sprayed into the machined cutting seam along the axial direction of the pipe electrode, the flowing state and distribution of the waste electrolyte in the long and narrow cutting seam are improved, the problems that the widths of the cutting seam are different from each other, the surface quality of the upper part and the lower part of the side wall of the cutting seam is not consistent are solved, and the machining quality of radial porous liquid-flushing electrolytic cutting of the lift pipe electrode is improved.
2. A large amount of gas-mixed electrolyte is sprayed into the machined joint, waste electrolyte flowing into the joint from the machining gap at the front end is bound into a liquid bundle, and the secondary electrolytic corrosion range of the waste electrolyte on the side wall of the joint is reduced; meanwhile, the gas-mixed electrolyte contains a large amount of gas, so that the conductivity of the electrolyte is reduced, the secondary electrolytic corrosion degree to the side wall of the seam is reduced, and the processing quality of the radial porous flushing electrolytic cutting of the riser electrode is improved.
3. The pressure of the gas-mixed electrolyte jetted along the axial direction of the tube electrode is smaller than that of the electrolyte jetted along the radial direction of the tube electrode, so that the axial scouring of the gas-mixed electrolyte is ensured not to influence the flow field in the front end machining gap, and the radial porous flushing electrolytic cutting machining efficiency of the tube electrode is ensured.
Drawings
FIG. 1 is a schematic view of the radial flushing electrolytic cutting of the auxiliary tube electrode by axial flushing of the gas-mixed electrolyte: a vertical cross-sectional view of the device,
FIG. 2 is a schematic side view of the gas-mixed electrolyte axial flushing auxiliary tube electrode radial flushing electrolytic cutting;
FIG. 3 is a cross-sectional view of an electrode radial flushing electrolytic cutting schematic of an auxiliary tube axially flushed by a mixed gas electrolyte;
FIG. 4 is a vertical cross-sectional view of a schematic radial flush electrolytic cutting of a tube electrode;
FIG. 5 is a schematic side view of a radial flooded electrolytic cutting of a tube electrode;
FIG. 6 is a schematic cross-sectional view of a radial flooded electrolytic cutting of a tube electrode;
fig. 7 is a structural schematic diagram of the radial liquid-flushing electrolytic cutting device for the auxiliary tube electrode axially flushed by the mixed gas electrolyte.
The reference numbers are respectively as follows: 1. gas mixing electrolyte, 2, electrolyte, 3, tube electrode, 4, jet hole, 5, bubble, 6, front end machining gap, 7, workpiece, 8, vertical support, 9, motor, 10, rotary adapter, 11, upper support, 12, water stop plug, 13, three-way nozzle, 14, middle support, 15 and lower support.
Detailed Description
According to the drawings shown in fig. 1-3, compared with fig. 4-6, in the process of the gas-mixed electrolyte axial scouring auxiliary tube electrode radial liquid-flushing electrolytic cutting machining, the electrolyte 2 with higher pressure and smaller flow is radially sprayed into the front end machining gap 6 through the plurality of jet holes 4 on the side wall of the tube electrode 3, rapidly participates in the electrolytic reaction, cuts and machines a workpiece 7, flushes out an electrolytic product in the front end machining gap 7, and then flows into the machined kerf through the gap between the tube electrode 3 and the kerf side wall; meanwhile, gas-mixed electrolyte 1 with low pressure and large flow is axially sprayed into the machined kerf along the tube electrode 3, so that the flow of the electrolyte 2 at the upper part and the lower part of the slit is the same, the waste electrolyte 2 flowing in the kerf from the machining gap 6 at the front end is bound into a liquid bundle, the distribution range of the waste electrolyte 2 in the slit is reduced, and the conductivity of the waste electrolyte 2 in the slit is also reduced by the gas-mixed electrolyte 1 containing a large amount of gas.
Referring to fig. 7, the gas-mixed electrolyte axial-scouring auxiliary tube electrode radial-scouring electrolytic cutting device provided by the invention mainly comprises a cathode clamp body, a motor 9, a rotary adapter 10, a three-way type jet 13, a tube electrode 3 and a workpiece 7. The cathode holder body comprises a vertical support 8, an upper support 11, a middle support 14 and a lower support 15. The motor 9 and the rotary joint 10 are mounted in an upper bracket 11. The three-way type nozzle 13 is installed in the middle bracket 14. The tube electrode 3 is connected to the rotary joint 10 at its upper end, passes through the three-way nozzle 13 at its middle portion, is coaxial with the nozzle, and is placed in the lower holder 15 at its lower end. During the electrolytic cutting processing, the electrolyte 2 enters the inner cavity of the tube electrode 3 through the rotary adapter 10 and is radially sprayed into the front end processing gap 6 from the plurality of jet holes 4 on the side wall of the tube electrode 3; the gas-mixed electrolyte 1 enters from a transverse inlet of the three-way nozzle 13, is sprayed out from a lower end nozzle and rushes into a machined kerf. The upper end of the three-way nozzle 13 is provided with a water stop plug 12. The numerical control machine tool controls the relative feeding motion between the tube electrode 3 and the workpiece 7 to complete the cutting processing of the workpiece 7; the motor 9 drives the tube electrode 3 to rotate rapidly through a gear, and the steering cutting processing is completed.
Claims (3)
1. A radial flushing electrolytic cutting method for an auxiliary tube electrode by axial flushing of mixed gas electrolyte is characterized by comprising the following steps:
in the process of carrying out large-thickness ruled surface structure electrolytic cutting machining by adopting a tube electrode (3), electrolyte (2) is radially sprayed into a front end machining gap (6) through a plurality of jet holes (4) on the side wall of the tube electrode (3), and flows into a machined kerf through a gap between the tube electrode (3) and the side wall of the kerf;
the gas-mixed electrolyte (1) is axially sprayed into the machined kerf along the tube electrode (3), the gas-mixed electrolyte (1) flows into the waste electrolyte (2) in the kerf from the machining gap (6) at the front end and is bound into a liquid beam, and the gas-mixed electrolyte (1) contains a large amount of gas and is flushed into the kerf to form a large amount of bubbles (5).
2. The method for the radial flushing electrolytic cutting of the electrode of the axial flushing auxiliary pipe by the mixed gas electrolyte as claimed in claim 1, is characterized in that:
the pressure of the gas-mixed electrolyte (1) axially sprayed out along the tube electrode (3) is less than that of the electrolyte (2) radially sprayed out along the tube electrode (3);
the flow of the gas-mixed electrolyte (1) axially sprayed out along the tube electrode (3) is larger than the flow of the electrolyte (2) radially sprayed out along the tube electrode (3).
3. The device for the radial liquid-flushing electrolytic cutting method of the auxiliary tube electrode by axially flushing the mixed gas electrolyte as claimed in claim 1, wherein:
the device comprises a cathode clamp body, a motor (9), a rotary adapter (10), a three-way nozzle (13), a tube electrode (3) and a workpiece (7);
the cathode clamp body comprises a vertical support (8), and an upper support (11), a middle support (14) and a lower support (15) are sequentially arranged on the vertical support (8) from top to bottom; the lower bracket (15) can be used for placing a workpiece (7),
the motor (9) and the rotary adapter (10) are arranged on the surface of the upper bracket (11); the three-way nozzle (13) is arranged in the middle bracket (14); the upper end of the tube electrode (3) is connected into the rotary adapter (10), the middle part of the tube electrode penetrates through the tee-joint nozzle (13) and is coaxial with the nozzle, and the lower end of the tube electrode is placed in the lower bracket (15);
the upper end of the three-way nozzle (13) is provided with a water stop plug (12).
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