CN114571018B - Radial flushing electrolytic cutting method and device for auxiliary pipe electrode by axial flushing of mixed gas electrolyte - Google Patents
Radial flushing electrolytic cutting method and device for auxiliary pipe electrode by axial flushing of mixed gas electrolyte Download PDFInfo
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- CN114571018B CN114571018B CN202210367947.0A CN202210367947A CN114571018B CN 114571018 B CN114571018 B CN 114571018B CN 202210367947 A CN202210367947 A CN 202210367947A CN 114571018 B CN114571018 B CN 114571018B
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- electrolyte
- pipe electrode
- mixed gas
- flushing
- electrode
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 80
- 238000005520 cutting process Methods 0.000 title claims abstract description 49
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 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
- 238000005507 spraying Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- 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
-
- 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 pipe electrode by using mixed gas electrolyte. The three-way nozzle is used for spraying mixed gas electrolyte in the joint seam which is processed along the axial direction of the pipe electrode, so that the problem of inconsistent surface quality of the upper and lower parts of the side wall of the joint seam caused by less electrolyte at the upper part and more electrolyte at the lower part in the long joint seam is solved; the mixed gas electrolyte binds the waste electrolyte flowing into the kerf from the front end processing gap into a liquid bundle, so that the secondary electrolytic corrosion range of the waste electrolyte on the kerf side wall is reduced; the mixed gas electrolyte contains a large amount of gas which is flushed into the cutting seam to form a large amount of bubbles, so that the conductivity of the electrolyte is reduced, and the secondary electrolytic corrosion degree of the side wall of the cutting seam is reduced. The method realizes high-quality electrolytic cutting processing of the large-thickness straight grain surface structure.
Description
Technical Field
The invention relates to a radial flushing electrolytic cutting method and device for an electrode of an auxiliary pipe for axial flushing of a gas-mixed electrolyte, and belongs to the technical field of electrochemical machining.
Background
The radial multi-hole flushing electrolytic cutting processing of the pipe electrode is a processing method which selects a hollow metal pipe with a plurality of jet holes on the side wall as a tool electrode and utilizes the radial jet of electrolyte to carry out electrolytic cutting on a workpiece. In the processing process, the electrolyte is directly sprayed into the front end processing gap through a plurality of jet holes on the side wall of the pipe electrode to participate in the electrolytic reaction, and electrolytic products are quickly flushed out. The method remarkably improves the processing efficiency of electrolytic cutting and the capability of processing workpieces with large thickness, and realizes the high-efficiency electrolytic cutting processing of the large-thickness straight grain surface structure.
However, the radial porous flushing liquid electrolytic cutting processing quality of the pipe electrode is poor, and the main appearance is that: when a workpiece with large thickness is cut, the width of the kerf is not uniform from top to bottom, the stray corrosion of the kerf side wall 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 multi-hole flushing liquid electrolytic cutting of the pipe electrode, electrolyte is radially sprayed to a front end processing gap through a plurality of jet holes on the side wall of the pipe electrode, flows back into a processed kerf along the gap between the outer wall of the pipe electrode and the side wall of the kerf after the electrolytic reaction is completed, and finally flows out from the lower end of the kerf under the action of gravity. The flow rate of the waste electrolyte containing the electrolysis products in the slit is low, and a large amount of waste electrolyte stays in the slit, so that the processed slit side wall is corroded by secondary electrolysis. In addition, the waste electrolyte is also distributed differently in the kerfs, the upper parts of the kerfs are distributed less, the lower parts of the kerfs are distributed more, the stray corrosion degree of the upper parts of the kerf side walls is light, the stray corrosion degree of the lower parts of the kerfs is heavy, and the problems of uneven widths of the kerfs from top to bottom and inconsistent surface quality of the upper parts and the lower parts of the side walls occur.
How to improve the electrolytic cutting quality of the radial porous flushing liquid of the pipe electrode and realize the high-quality and high-efficiency cutting processing of the large-thickness straight-line surface structure is still a problem to be solved.
Disclosure of Invention
Aiming at the problems of inconsistent upper and lower widths of kerfs, poor surface quality of side walls and the like when the radial porous flushing liquid electrolytic cutting of the pipe electrode is used for cutting a large-thickness straight grain surface structure, the invention provides a radial flushing liquid electrolytic cutting processing method and device for assisting the pipe electrode to be flushed by a gas-mixed electrolyte axially.
In the method for cutting the large-thickness straight grain surface structure by using the mixed gas electrolyte to axially wash the auxiliary pipe electrode, in the process of cutting the large-thickness straight grain surface structure by using the radial porous liquid, the electrolyte is radially sprayed into a front end machining gap through a plurality of jet holes on the side wall of the pipe electrode, quickly participates in electrolytic reaction, cuts and machines a workpiece, washes out electrolytic products in the front end machining gap, and then flows into the machined kerf through the gap between the pipe electrode and the side wall of the kerf. Meanwhile, the mixed gas electrolyte is axially sprayed into the machined joint seam along the pipe electrode, so that the electrolyte flow rates at the upper part and the lower part of the long joint seam are the same, and the problem of inconsistent surface quality of the upper part and the lower part of the side wall of the joint seam caused by nonuniform electrolyte flow rate distribution in the long joint seam is solved; the waste electrolyte flowing into the kerf from the front end processing gap is bound into a liquid bundle by a large amount of mixed gas electrolyte, so that the secondary electrolytic corrosion range of the waste electrolyte on the side wall of the kerf is reduced; the mixed gas electrolyte contains a large amount of gas which is flushed into the kerf to form a large amount of bubbles, so that the conductivity of the electrolyte is reduced, the secondary electrolytic corrosion degree on the kerf side wall is reduced, and the electrolytic cutting quality is improved.
The method for electrolytic cutting by radial flushing of the auxiliary pipe electrode by axial flushing of the mixed gas electrolyte ensures that the flow field in the front end machining gap is not influenced by the axially sprayed mixed gas electrolyte, and ensures the electrolytic cutting efficiency.
According to the method for the radial flushing electrolytic cutting of the auxiliary pipe electrode for the axial flushing of the mixed gas electrolyte, the flow of the mixed gas electrolyte which is axially sprayed into the kerf along the pipe electrode is larger than the flow of the electrolyte which is radially sprayed into the front end processing along the pipe electrode, so that the waste electrolyte which flows into the kerf from the front end processing gap is restrained by the axially sprayed mixed gas electrolyte, and the waste electrolyte is quickly flushed out of the long and narrow kerf.
The device mainly comprises a cathode clamp body, a motor, a rotary adapter, a three-way nozzle, a pipe electrode and a workpiece. The cathode clamp body comprises a vertical support, and an upper support, a middle support and a lower support are sequentially arranged on the vertical support from top to bottom. The motor and the connector are arranged on the surface of the upper bracket, and the three-way nozzle is arranged in the middle bracket. The upper end of the tube electrode is connected to the rotary joint, the middle part of the tube electrode passes through the three-way nozzle and is coaxial with the nozzle, and the lower end of the tube electrode is arranged in the lower bracket. During electrolytic cutting, electrolyte enters the inner cavity of the pipe electrode through the rotary adapter, and then is radially sprayed into the front end machining gap from a plurality of jet holes on the side wall of the pipe electrode; the mixed gas electrolyte enters from the transverse inlet of the three-way nozzle, and then is sprayed out from the nozzle at the lower end to be flushed into the processed kerf. A water stop plug is arranged at the upper end of the three-way nozzle to prevent the mixed gas electrolyte from being sprayed out from the upper end. The numerical control machine controls the relative feeding movement between the pipe electrode and the workpiece to finish the cutting processing of the workpiece; the motor drives the pipe electrode to rotate rapidly through the gear, and steering cutting processing is completed.
The invention has the beneficial effects that:
1. according to the method for assisting the radial flushing electrolytic cutting of the pipe electrode by the gas-mixed electrolyte in the axial flushing, in the processing process, the gas-mixed electrolyte is rapidly sprayed into the processed kerfs along the axial direction of the pipe electrode, so that the flowing state and distribution of waste electrolyte in the elongated kerfs are improved, the problems of different widths of the kerfs up and down and inconsistent surface quality of the upper and lower parts of the side walls of the kerfs are solved, and the processing quality of the radial porous flushing electrolytic cutting of the pipe electrode is improved.
2. Spraying a large amount of mixed gas electrolyte into the processed kerfs, binding the waste electrolyte flowing into the kerfs from the front end processing gap into liquid bundles, and reducing the secondary electrolytic corrosion range of the side walls of the kerfs by waste electrolysis; meanwhile, the mixed gas electrolyte contains a large amount of gas, so that the conductivity of the electrolyte is reduced, the secondary electrolytic corrosion degree on the side wall of the cutting joint is reduced, and the radial porous flushing liquid electrolytic cutting processing quality of the pipe electrode is improved.
3. The pressure of the mixed gas electrolyte axially sprayed along the pipe electrode is smaller than that of the electrolyte radially sprayed along the pipe electrode, so that the flow field in the front end machining gap cannot be influenced by the axial scouring of the mixed gas electrolyte, and the electrolytic cutting machining efficiency of the radial porous flushing liquid of the pipe electrode is ensured.
Drawings
Fig. 1 is a schematic diagram of radial flushing electrolytic cutting of an electrode of an auxiliary pipe for axial flushing of a gas-mixed electrolyte: a vertical cross-sectional view of the device,
FIG. 2 is a schematic side view of radial flushing electrolytic cutting of an electrode of an auxiliary pipe for axial flushing of a gas-mixed electrolyte;
FIG. 3 is a schematic cross-sectional view of radial flushing electrolytic cutting of the electrode of the auxiliary pipe for axial flushing of the gas-mixed electrolyte;
FIG. 4 is a schematic vertical cross-sectional view of a tube electrode radial-flushing electrolytic cutting;
FIG. 5 is a schematic side view of a tube electrode radial-flushing electrolytic cutting;
FIG. 6 is a schematic cross-sectional view of a tube electrode radial-direction electrolyte cutting;
fig. 7 is a schematic structural diagram of a radial flushing electrolytic cutting device for the electrode of the auxiliary pipe for axial flushing of the mixed gas electrolyte.
The reference numerals are respectively as follows: 1. the gas-mixing electrolyte, 2, the electrolyte, 3, a pipe electrode, 4, a jet hole, 5, bubbles, 6, a front end machining gap, 7, a workpiece, 8, a vertical support, 9, a motor, 10, a rotary adapter, 11, an upper support, 12, a water stop plug, 13, a three-way nozzle, 14, a middle support, 15 and a lower support.
Detailed Description
According to the figures 1-3, compared with figures 4-6, in the process of the axial flushing auxiliary pipe electrode radial flushing electrolytic cutting process of the mixed gas electrolyte provided by the invention, electrolyte 2 with higher pressure and smaller flow rate is radially sprayed into a front end processing gap 6 through a plurality of jet holes 4 on the side wall of a pipe electrode 3, rapidly participates in electrolytic reaction, cuts and processes a workpiece 7, flushes electrolytic products in the front end processing gap 7, and then flows into a processed kerf through a gap between the pipe electrode 3 and the side wall of the kerf; meanwhile, the mixed gas electrolyte 1 with smaller pressure and larger flow rate is axially sprayed into the machined kerfs along the pipe electrode 3, so that the flow rates of the electrolyte 2 at the upper and lower parts of the elongated kerfs are the same, the waste electrolyte 2 flowing into the kerfs from the front end machining gap 6 is bound into a liquid bundle, the distribution range of the waste electrolyte 2 in the elongated kerfs is shortened, and the mixed gas electrolyte 1 containing a large amount of gas also reduces the conductivity of the waste electrolyte 2 in the kerfs.
According to the figure 7, the invention provides a radial flushing electrolytic cutting device for a mixed gas electrolyte axial flushing auxiliary pipe electrode, which mainly comprises a cathode clamp body, a motor 9, a rotary adapter 10, a three-way spray 13, a pipe electrode 3 and a workpiece 7. The cathode fixture 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 adapter 10 are mounted in the upper bracket 11. The three-way nozzle 13 is mounted in the middle bracket 14. The upper end of the tube electrode 3 is connected to the rotary joint 10, the middle part passes through the three-way nozzle 13 and is coaxial with the nozzle, and the lower end is placed in the lower bracket 15. During electrolytic cutting processing, electrolyte 2 enters the inner cavity of the pipe electrode 3 through the rotary joint 10, and then is radially sprayed into the front end processing gap 6 from a plurality of jet holes 4 on the side wall of the pipe electrode 3; the mixed gas electrolyte 1 enters from the transverse inlet of the three-way nozzle 13, and then is sprayed out from the lower nozzle to be flushed into the machined joint. A water stop 12 is arranged at the upper end of the three-way nozzle 13. The numerical control machine controls the relative feeding movement between the pipe electrode 3 and the workpiece 7 to finish the cutting processing of the workpiece 7; the motor 9 drives the pipe 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 electrode of an auxiliary pipe for axial flushing of a mixed gas electrolyte is characterized by comprising the following steps of:
in the electrolytic cutting processing process of the large-thickness straight grain surface structure by adopting the pipe electrode (3), the electrolyte (2) is radially sprayed into a front end processing gap (6) through a plurality of jet holes (4) on the side wall of the pipe electrode (3), and flows into the processed kerf through the gap between the pipe electrode (3) and the kerf side wall;
the mixed gas electrolyte (1) enters from a transverse inlet of a tee nozzle (13), is sprayed out from a lower nozzle and is axially sprayed into the processed joint seam along a pipe electrode (3), the mixed gas electrolyte (1) is bound into a liquid bundle from waste electrolyte (2) flowing into the joint seam from a front end processing gap (6), a large amount of gas is contained in the mixed gas electrolyte (1), and a large amount of bubbles (5) are formed in the joint seam by flushing.
2. The method for radial flushing electrolytic cutting of the mixed gas electrolyte axial flushing auxiliary pipe electrode is characterized in that: the pressure of the mixed gas electrolyte (1) axially sprayed along the pipe electrode (3) is smaller than the pressure of the electrolyte (2) radially sprayed along the pipe electrode (3); the flow rate of the mixed gas electrolyte (1) axially sprayed along the pipe electrode (3) is larger than the flow rate of the electrolyte (2) radially sprayed along the pipe electrode (3).
3. The device for utilizing the radial flushing electrolytic cutting method of the mixed gas electrolyte axial flushing auxiliary pipe electrode is characterized in that: the device comprises a cathode clamp body, a motor (9), a rotary adapter (10), a three-way nozzle (13), a pipe electrode (3) and a workpiece (7);
the cathode clamp body comprises a vertical bracket (8), and an upper bracket (11), a middle bracket (14) and a lower bracket (15) are sequentially arranged on the vertical bracket (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 pipe electrode (3) is connected into the rotary joint (10), the middle part of the pipe electrode passes through the three-way nozzle (13) and is coaxial with the nozzle, and the lower end of the pipe electrode is arranged in the lower bracket (15);
a water stop plug (12) is arranged at the upper end of the three-way nozzle (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210367947.0A CN114571018B (en) | 2022-04-08 | 2022-04-08 | Radial flushing electrolytic cutting method and device for auxiliary pipe electrode by axial flushing of mixed gas electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210367947.0A CN114571018B (en) | 2022-04-08 | 2022-04-08 | Radial flushing electrolytic cutting method and device for auxiliary pipe electrode by axial flushing of mixed gas electrolyte |
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| Publication Number | Publication Date |
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| CN114571018A CN114571018A (en) | 2022-06-03 |
| CN114571018B true CN114571018B (en) | 2023-12-22 |
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| CN202210367947.0A Active CN114571018B (en) | 2022-04-08 | 2022-04-08 | Radial flushing electrolytic cutting method and device for auxiliary pipe electrode by axial flushing of mixed gas electrolyte |
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