CN220838306U - Capillary electrohydraulic beam processing device with built-in metal wire - Google Patents
Capillary electrohydraulic beam processing device with built-in metal wire Download PDFInfo
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- CN220838306U CN220838306U CN202322687822.9U CN202322687822U CN220838306U CN 220838306 U CN220838306 U CN 220838306U CN 202322687822 U CN202322687822 U CN 202322687822U CN 220838306 U CN220838306 U CN 220838306U
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 41
- 230000007704 transition Effects 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The utility model discloses a capillary electro-hydraulic beam processing device with a built-in metal wire, which comprises: the pipeline interface is internally provided with a first cavity, and the top of the pipeline interface is communicated with an electrolyte inlet and a power supply cathode inlet; the sleeve is internally provided with a second cavity, a transition hole and a conical hole with a downward opening in a communicating manner from top to bottom; the rubber plug is arranged in the transition hole; the elastic chuck is arranged in the conical hole; the capillary tube is coaxially arranged in the sleeve, and the lower section of the capillary tube sequentially penetrates out of the central channels of the rubber plug and the elastic chuck; a wire electrode coaxially inserted into the top of the capillary; the second cavity is communicated with the first cavity to form a cavity for storing electrolyte; the electrode wire is used for carrying out cathodic treatment on the electrolyte; and the capillary is used for circulating the cathode electrolyte and emitting the electrolyte downwards to form an electro-hydraulic beam. The method solves the problem that the positioning of the capillary tube and the metal wire is difficult in the existing electro-hydraulic beam processing technology.
Description
[ Field of technology ]
The utility model belongs to the technical field of electrochemical machining, and particularly relates to a capillary electro-hydraulic beam machining device with a built-in metal wire.
[ Background Art ]
When the electrohydraulic beam is processed, the metal workpiece is connected with the anode, and the electrode wire is connected with the cathode. Direct current voltage is applied between the cathode and the anode, the acid solution is pressed into the glass tube by the high-pressure pump, and the liquid entering the glass tube forms a continuous liquid beam under the action of pressure and is emitted to the processed part. Under the action of an electric field, the liquid beam is cathodized, and the anode metal workpiece is continuously dissolved and removed, so that the formation of small holes is realized, and the method is one of main processing means of the air film holes of the turbine blades of the aeroengine, and has important significance for prolonging the service life and improving the performance of the aeroengine. The electro-hydraulic beam machining has the main characteristics of good machining accessibility, no heat affected zone, no remelting layer and no machining stress on the machined surface, and the machined hole has smooth inlet and outlet and no burrs. The electro-hydraulic beam processing technology has the characteristics that the electro-hydraulic beam processing technology is very in accordance with the processing requirements of hole structures, particularly deep small holes, and becomes one of the important hole making processes of advanced aeroengines with high thrust-weight ratio. A capillary hole (CAPILLARY DRILLING, CD) is drilled in one of the electro-hydraulic beam processing methods, an electrolyte nozzle of the process is a glass capillary, a platinum wire is inserted into the tube to serve as a tool cathode, the method is mainly used for processing small holes with the aperture of 0.2-0.5 mm, the highest depth-to-diameter ratio can reach 50, and the method is very suitable for processing large depth-to-diameter ratio small holes of turbine working blades.
The positioning and mounting of capillaries and wires is one of the important core technologies in capillary drilling processes. As a jet carrier for conveying the acidic electrolyte, the accurate axial and radial positioning of the capillary is the key for processing qualified pores. The wire inserted in the middle of the capillary cannot disturb the formation of the liquid beam, and the distance between the end of the wire and the outlet end of the electrode needs to be ensured in the liquid beam so as to avoid large fluctuation of the processing current caused by the change of the end distance of the wire. When processing different pore diameters and pore depths, the capillary and the metal wire also need to be correspondingly adjusted. Because the traditional capillary fixing mode needs to consider hydraulic tightness, a cementing mode is often adopted, the sealing glue is needed to be removed firstly for each time of adjusting or replacing the capillary, the capillary is glued and solidified again after replacement, time and labor are wasted, the requirement of quick adjustment cannot be met, and the positioning precision of the capillary after cementing is difficult to guarantee.
[ utility model ]
The utility model aims to provide a capillary electro-hydraulic beam processing device with a built-in metal wire, which solves the problem that the positioning of the capillary and the metal wire is difficult in the existing electro-hydraulic beam processing technology.
The utility model adopts the following technical scheme: a capillary electrohydraulic beam processing device with built-in wires, comprising:
the pipeline connector is of a cylinder structure, a first cavity is formed in the pipeline connector, the bottom of the pipeline connector is open, and an electrolyte inlet and a power supply cathode inlet are communicated with each other at the top of the pipeline connector;
The sleeve is of a cylinder structure with an upper opening and a lower opening, and a second cavity, a transition hole and a conical hole with a downward opening are sequentially communicated from top to bottom;
The rubber plug is of a hollow columnar structure and is arranged in the transition hole;
The elastic chuck is arranged in the conical hole and is provided with a central channel extending along the axis of the elastic chuck;
The capillary tube is coaxially arranged in the sleeve, the upper end of the capillary tube is positioned in the second cavity, and the lower section of the capillary tube sequentially penetrates out of the central channels of the rubber plug and the elastic chuck;
The electrode wire is coaxially inserted into the top of the capillary tube, the lower section of the electrode wire is positioned in the second cavity, the upper section of the electrode wire is positioned in the first cavity, and the electrode wire is fixed in the sleeve through the electrode mounting bracket; the diameter of the electrode wire is smaller than the inner diameter of the capillary;
The second cavity is communicated with the first cavity to form a cavity for storing electrolyte; the electrode wire is used for being connected with a power supply cathode connected through a power supply cathode inlet and also used for carrying out cathodic treatment on electrolyte after the positive electrode of the power supply is connected with a workpiece to be processed; and the capillary is used for circulating the cathode electrolyte and emitting the electrolyte downwards to form an electro-hydraulic beam.
Furthermore, the electrode wire is sleeved with a lead copper column, and a gap is reserved between the bottom surface of the lead copper column and the top surface of the capillary tube.
Further, four mounting grooves are vertically formed in the inner wall of the top of the sleeve, the electrode mounting bracket is provided with a cylindrical barrel, four vertically arranged rib plates are uniformly arranged on the outer side of the cylindrical barrel and are used for being inserted into the mounting grooves, the cylindrical barrel is provided with a central hole, and the central hole is used for allowing a copper lead column of an electrode wire to pass through;
Two fastening screws (10) are arranged on the outer side of the cylindrical barrel body oppositely, and the two fastening screws (10) are used for adjusting the upper and lower height positions of the electrode wire through tightening and loosening of the two fastening screws.
Further, the elastic clamping head comprises a columnar joint, a central channel is coaxially arranged in the columnar joint, a plurality of elastic clamping pieces are downwards arranged at the bottom of the columnar joint, and a channel space communicated with the central channel is reserved among the plurality of elastic clamping pieces; the elastic clamping pieces are used for clamping the capillary after the elastic clamping pieces are folded and also used for adjusting the upper and lower heights of the capillary when the elastic clamping pieces are freely unfolded.
Further, a locking nut is coaxially arranged at the bottom of the sleeve, and the locking nut is used for pressing the elastic clamping head into the conical hole in a mode of screwing the locking nut into the bottom of the sleeve upwards so as to enable the plurality of elastic clamping pieces to be folded and clamp the capillary.
Further, an exhaust port communicated with the second cavity is arranged at the top of the pipeline interface.
The beneficial effects of the utility model are as follows: the utility model relates to a capillary electrohydraulic beam processing device with a built-in metal wire, which is characterized in that an electrode wire is arranged in a capillary, the positive electrode and the negative electrode of a power supply are respectively connected with a processing workpiece and the electrode wire, the accurate positioning of the capillary and the conductive electrode wire in the capillary are respectively ensured by an elastic chuck and an electrode mounting bracket, high-pressure electrolyte forms a continuous liquid beam through the capillary and is sprayed onto a processing area to form a conductive path, and a target structure is obtained by utilizing an electrochemical processing principle. The utility model adopts the mode that the rubber plug and the elastic chuck are mutually matched to replace the glue joint to be used as the fixation of the capillary, thereby obviously shortening the time required for adjusting the capillary and greatly reducing the operation difficulty of replacing the capillary.
[ Description of the drawings ]
FIG. 1 is a schematic perspective view of a capillary electrohydraulic beam processing device incorporating a wire according to the present utility model;
FIG. 2 is a schematic diagram showing the connection relationship among a pipeline interface, a sleeve and a lock nut of a capillary electro-hydraulic beam processing device with a built-in metal wire;
FIG. 3 is a schematic diagram showing the connection relationship among the electrode wire, the capillary, the rubber plug and the elastic chuck of the capillary electrohydraulic beam processing device with a built-in metal wire;
FIG. 4-1 is a schematic cross-sectional view of a wire-built-in capillary electrohydraulic beam processing device according to the present utility model;
FIG. 4-2 is an enlarged view of FIG. 4-1 at A;
FIG. 5 is a schematic diagram showing the mounting relationship between the wire electrode and the capillary tube of the capillary electro-hydraulic beam processing device with the wire inside;
FIG. 6 is a schematic view of the structure of an electrode mounting bracket of a capillary electrohydraulic beam processing device with built-in metal wires;
FIG. 7 is a schematic diagram showing the locking of the elastic chuck of the capillary electrohydraulic beam processing device with built-in metal wires.
Wherein, 1, a pipeline interface, 104, a first cavity, 101, an electrolyte inlet, 102, an exhaust port, 103, a power cathode interface, 2, an electrode wire, 201, a lead copper column, 3, an electrode mounting bracket, 301, a cylindrical barrel, 302, a rib plate, 303, a central hole, 4, a rubber plug, 5, a sleeve, 501, a second cavity, 502, a conical hole, 503, a transitional hole, 6, an elastic chuck, 601, a columnar joint, 602, an elastic clamping piece, 7, a lock nut, 8, a capillary, 9, a workpiece to be processed and 10, a fastening screw.
[ Detailed description ] of the invention
The utility model will be described in detail below with reference to the drawings and the detailed description.
The utility model provides a capillary electro-hydraulic beam processing device with a built-in metal wire, which comprises a pipeline interface 1 and a sleeve 5 which are connected in series, wherein a rubber plug 4 and an elastic chuck 6 are arranged in the sleeve 5, a wire electrode 2 is coaxially inserted into a capillary 8 and is coaxially arranged in the pipeline interface 1 and the sleeve 5, and the capillary 8 extends outwards to a workpiece to be processed.
Specifically, the pipeline connector 1 is in a cylindrical structure, a first cavity 104 is formed in the pipeline connector 1, the bottom of the pipeline connector 1 is open, and an electrolyte inlet 101 and a power cathode inlet 103 are communicated with the top of the pipeline connector 1. In use, electrolyte is injected through electrolyte inlet 101.
The sleeve 5 has a cylindrical structure with openings at the top and bottom, and is divided into three parts communicated with each other, namely a second cavity 501, a transition hole 503 and a conical hole 502 with a downward opening from top to bottom. The second cavity 501 is columnar, the transition hole 503 is also columnar, and the rubber plug 4 is placed in the transition hole 503. The rubber stopper 4 is a hollow cylindrical structure which is installed in the transition hole 503 and can be sealed after installation so that the second cavity 501 is not directly communicated with the tapered hole 502.
The collet 6 is disposed in the tapered bore 502, and the collet 6 has a central passage extending along its axis. The central passage is used for the capillary 8 to pass through and clamp the capillary 8 by the folding of the collet 6. The capillary tube 8 is coaxially arranged in the sleeve 5, and is specifically arranged in the center of the rubber plug 4 and the center channel of the elastic chuck 6, the top end of the capillary tube 8 stretches into the second cavity 501, and the bottom end of the capillary tube 8 penetrates out of the center channel of the elastic chuck 6 and extends to the position of a workpiece to be processed.
As shown in fig. 4-2, the wire electrode 2 is coaxially inserted into the interior of the capillary 8, and the bottom end of the wire electrode 2 is inserted into the capillary 8 but is not exposed from the bottom of the capillary 8. Typically the wire electrode 2 may be a capillary glass tube electrode. The top end of the electrode wire 2 extends out of the capillary tube 8 and is positioned in the first cavity 104, and an electricity-guiding copper column 201 outside the electrode wire 2 is fixed in the sleeve 5 through the electrode mounting bracket 3; the diameter of the electrode wire 2 is smaller than the inner diameter of the capillary tube 8, so that an electrolyte entering space is left at the top of the capillary tube 8 after the electrode wire 2 is inserted.
The second cavity 501 is in communication with the first cavity 104 to form a chamber for storing an electrolyte. The electrode wire 2 is used for being connected with a power supply negative electrode accessed through the power supply negative electrode access 103 and is also used for performing cathodic treatment on electrolyte after a positive electrode of the power supply is connected with a workpiece 9 to be processed. Electrolyte flows in through the electrolyte inlet and is sprayed to a processing area of a workpiece to be processed through the lower end of the capillary tube 8, so that the workpiece to be processed and the cathode form a conductive path through the electrolyte. The capillary 8 is used for circulating the electrolyte for cathodization and emitting the electrolyte downwards to form an electro-hydraulic beam.
In some embodiments, as shown in fig. 3 and 5, the wire electrode 2 is sleeved with a copper current guiding column 201, and a gap is left between the bottom surface of the copper current guiding column 201 and the top surface of the capillary 8. The top end opening of the capillary tube 8 is an inlet into which the electrolyte flows.
In some embodiments, as shown in fig. 6, four mounting grooves are vertically formed in the inner wall of the top of the sleeve 5, the electrode mounting bracket 3 has a cylindrical barrel 301, four ribs 302 vertically arranged are uniformly disposed on the outer side of the cylindrical barrel 301, the ribs 302 are used for being inserted into the mounting grooves, the cylindrical barrel 301 has a central hole 303, and the central hole 303 is used for allowing the current-carrying copper pillar 201 of the electrode wire 2 to pass through; two fastening screws 10 are arranged on the outer side of the cylindrical body 301 oppositely, and the two fastening screws 10 are used for adjusting the upper and lower height positions of the electrode wire 2 through tightening and loosening. The electrode mounting bracket 3 can realize the axial and radial positioning of the electrode wire 2 by matching with the fastening screw 10.
In some embodiments, as shown in fig. 3 and 7, the elastic clamping head 6 includes a columnar joint 601, a central channel is coaxially disposed in the columnar joint 601, a plurality of elastic clamping pieces 602 are disposed downward at the bottom of the columnar joint 601, and a channel space penetrating through the central channel is reserved between the plurality of elastic clamping pieces 602; the plurality of elastic clips 602 are used for clamping the capillary tube 8 after the elastic clips are folded, and are also used for adjusting the height of the capillary tube 8 when the elastic clips are freely unfolded. The elastic clamping head 6 is matched with the rubber plug 4 to realize the axial and radial positioning of the capillary tube 8.
In some embodiments, as shown in fig. 7, a lock nut 7 is coaxially disposed at the bottom of the sleeve 5, and the lock nut 7 is used to press the elastic clamping head 6 into the tapered hole 502 by screwing up the bottom of the sleeve 5, so that the plurality of elastic clamping pieces 602 retract and clamp the capillary 8.
In some embodiments, as shown in fig. 1, the top of the pipe joint 1 is provided with an exhaust port 102 communicating with the second cavity 501 inside for exhausting. The exhaust port 102 may be sealed with the screw rubber plug after exhausting the air inside the first cavity 104 and the second cavity 501.
A current sensor may be provided in the conductive circuit of the power supply for detecting a current in the conductive path; a pressure sensor may be provided on the electrolyte flow path for detecting the pressure of the electrolyte flowing into the electrolyte inlet 101.
The utility model relates to a use method of a capillary electro-hydraulic beam processing device with a built-in metal wire, which comprises the following steps:
The cathode of the power supply is connected with the upper terminal of the electrode wire 2 through the power supply cathode access 103, and then the power supply cathode access 103 is sealed through epoxy resin;
Before the electrohydraulic beam processing is started, electrolyte flows in from the electrolyte inlet 101, fills the first cavity 104 and the second cavity 501, discharges air in the two cavities, and seals the exhaust port 102 by matching a screw with a sealing ring;
After the electrohydraulic beam machining is started, electrolyte continuously flows in from an electrolyte inlet 101, the electrolyte is cathodized through the electrode wire 2, the electrolyte enters from the top end of the capillary 8, and then the electrohydraulic beam is formed to be shot to the anodized workpiece 9 to be machined, so that the small hole machining is realized.
The capillary tube 8 is installed in the following manner: the capillary tube 8 is inserted into the central passage of the collet 6, and the collet 6 is placed in the tapered bore 502, the rubber stopper 4 is sleeved on the capillary tube 8, and the upper end of the capillary tube 8 extends into the second cavity 501. After adjusting the extension length of the capillary tube 8, an upward pressing force is applied to the collet 6, the collet 6 is further pushed into the tapered hole 502, the narrowing speed of the inner cavity of the tapered hole 502 is slightly faster than that of the collet 6, and along with the pushing of the collet 6, the inner wall of the tapered hole 502 gives a radial pressing force to the collet 6, the collet 6 becomes a compressed state, and the capillary tube 8 is locked.
In practical use, the power cathode inlet 103, the joint between the pipeline connector 1 and the sleeve 5, and the like can be glued and sealed.
The utility model is characterized in that an electrode wire is arranged in a capillary, the positive electrode and the negative electrode of a power supply are respectively connected with a processing workpiece and the electrode wire, the accurate positioning of the capillary and the conductive electrode wire inside the capillary is respectively ensured by an elastic chuck and an electrode mounting bracket, high-pressure electrolyte forms a continuous liquid beam through the capillary and is sprayed onto a processing area to form a conductive path, and a target structure is obtained by utilizing an electrochemical processing principle. The utility model adopts the mode that the rubber plug and the elastic chuck are mutually matched to replace the glue joint to be used as the fixation of the capillary, thereby obviously shortening the time required for adjusting the capillary and greatly reducing the operation difficulty of replacing the capillary.
Claims (6)
1. A capillary electrohydraulic beam processing device with a built-in wire, comprising:
A pipeline interface (1) is of a cylindrical structure, a first cavity (104) is formed in the pipeline interface, the bottom of the pipeline interface is open, and an electrolyte inlet (101) and a power supply cathode access (103) are communicated and arranged at the top of the pipeline interface;
The sleeve (5) is of a cylinder structure with an opening at the top and the bottom, and a second cavity (501), a transition hole (503) and a conical hole (502) with a downward opening are sequentially communicated from top to bottom;
A rubber plug (4) with a hollow columnar structure and arranged in the transition hole (503);
A collet (6) disposed within the tapered bore (502), the collet (6) having a central passage extending along an axis thereof;
The capillary tube (8) is coaxially arranged in the sleeve (5), the upper end of the capillary tube is positioned in the second cavity (501), and the lower section of the capillary tube sequentially penetrates out of the central channels of the rubber plug (4) and the elastic chuck (6);
The wire electrode (2) is coaxially inserted into the top of the capillary tube (8), the lower section of the wire electrode (2) is positioned in the capillary tube (8), the upper section of the wire electrode (2) is positioned in the first cavity (104), and the wire electrode (2) is fixed in the sleeve (5) through the electrode mounting bracket (3); the diameter of the electrode wire (2) is smaller than the inner diameter of the capillary (8);
the second cavity (501) is communicated with the first cavity (104) and is used for forming a chamber for storing electrolyte; the electrode wire (2) is used for being connected with a power supply negative electrode accessed through a power supply negative electrode access port (103) and is also used for performing cathodic treatment on electrolyte after the positive electrode of the power supply is connected with a workpiece (9) to be processed; the capillary tube (8) is used for circulating the cathode electrolyte and emitting the electrolyte downwards to form an electro-hydraulic beam.
2. The capillary electrohydraulic beam processing device with built-in metal wire according to claim 1, wherein said electrode wire (2) is sleeved with a lead copper column (201), and a gap is left between the bottom surface of said lead copper column (201) and the top surface of said capillary tube (8).
3. The capillary electrohydraulic beam processing device with built-in metal wires according to claim 1 or 2, characterized in that, four mounting grooves are vertically formed on the inner wall of the top of the sleeve (5), the electrode mounting bracket (3) is provided with a cylindrical barrel (301), four vertically arranged rib plates (302) are uniformly arranged on the outer side of the cylindrical barrel (301), the rib plates (302) are used for being inserted into the mounting grooves, the cylindrical barrel (301) is provided with a central hole (303), and the central hole (303) is used for allowing a power-on copper column (201) of the electrode wire (2) to pass through;
Two fastening screws (10) are arranged on the outer side of the cylindrical barrel body (301) oppositely, and the two fastening screws (10) are used for adjusting the upper and lower height positions of the electrode wire (2) through tightening and loosening of the fastening screws.
4. A capillary electrohydraulic beam processing device with built-in metal wire as in claim 3, characterized in that said elastic clamping head (6) comprises a column joint (601), a central channel is coaxially arranged in said column joint (601), a plurality of elastic clamping pieces (602) are downward arranged at the bottom of said column joint (601), a channel space is reserved between a plurality of said elastic clamping pieces (602) and is communicated with said central channel; the elastic clamping pieces (602) are used for clamping the capillary tube (8) after the elastic clamping pieces are folded, and are also used for adjusting the upper and lower heights of the capillary tube (8) when the elastic clamping pieces are freely unfolded.
5. The capillary electrohydraulic beam processing device of claim 4 wherein a lock nut (7) is coaxially disposed at a bottom of said sleeve (5), said lock nut (7) being adapted to press said collet (6) into said tapered bore (502) by screwing up said collet into said bottom of said sleeve (5) to collapse said plurality of spring clips (602) and clamp said capillary (8).
6. A capillary electro-hydraulic beam machining apparatus incorporating a wire according to claim 3, wherein the top of the pipe connection (1) is provided with an exhaust port (102) communicating with the second cavity (501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322687822.9U CN220838306U (en) | 2023-10-08 | 2023-10-08 | Capillary electrohydraulic beam processing device with built-in metal wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322687822.9U CN220838306U (en) | 2023-10-08 | 2023-10-08 | Capillary electrohydraulic beam processing device with built-in metal wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220838306U true CN220838306U (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322687822.9U Active CN220838306U (en) | 2023-10-08 | 2023-10-08 | Capillary electrohydraulic beam processing device with built-in metal wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220838306U (en) |
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2023
- 2023-10-08 CN CN202322687822.9U patent/CN220838306U/en active Active
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