Tool clamp for deburring ECM electrode of fuel injector seat

Abstract

The utility model provides a work fixture for removing burrs of an ECM electrode of an oil injector seat, an oil through hole is formed in the oil injector seat, a first groove is formed in the inner side wall of the oil through hole, and the work fixture comprises at least one ECM electrode deburring assembly. Each ECM electrode deburring assembly comprises an anode conductive head used for making contact with the oil injector base and a cathode rod used for being embedded into the oil through hole, the anode conductive heads are connected with anode rods, liquid guide channels are formed in the cathode rods and communicate with liquid guide holes in the tops of the cathode rods, the tops of the cathode rods are connected with cathode conductive heads, and the outer side walls of the cathode rods are sleeved with insulation sleeves. Through holes are formed in the positions, corresponding to the first grooves, of the cathode rod and the insulation sleeve and communicate with the liquid guide channel and the exterior of the insulation sleeve. The utility model solves the problems of how to clamp the high-pressure common-rail oil pipe and how to conveniently remove burrs among crossed inner holes of the high-pressure common-rail oil pipe in an ECM electrode deburring mode in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of a tooling fixture for a fuel injector seat used for an automobile engine, in particular to a tooling fixture for deburring an ECM electrode of a fuel injector seat. Background Art

[0002] With the development of China's economy, the processing quality requirements of parts in China's automobile industry are constantly improving, and the production capacity is increasing day by day, so the requirements for product production quality and safety are also constantly increasing. If the burrs are not removed cleanly, they will fall off and get stuck in the parts, causing a series of problems and product dysfunction. The high-pressure common rail is a part of the automobile engine parts, which is an important factor in automobile safety. The burr removal problem inside the high-pressure common rail oil pipe (especially the cross inner hole) is an important factor affecting the engine.

[0003] Electrochemical machining (ECM) is a method of removing excess material from a workpiece and deburring parts by using the anodic dissolution reaction of metal in an electrolyte.

[0004] Therefore, how to clamp the high-pressure common rail oil pipe to facilitate the removal of burrs between the cross inner holes of the high-pressure common rail oil pipe through the ECM electrode deburring method has become a technical problem that needs to be solved. Utility Model Content

[0005] The utility model aims to provide a fixture for deburring the ECM electrode of the injector seat, which mainly solves the problem of how to clamp the high-pressure common rail oil pipe in the above-mentioned prior art, so as to facilitate the removal of burrs between the cross inner holes of the high-pressure common rail oil pipe by deburring the ECM electrode.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a tooling fixture for deburring the ECM electrode of an injector seat, an oil through hole is arranged in the injector seat, and a first groove is arranged on the inner wall of the oil through hole, characterized in that: the tooling fixture comprises at least one group of ECM electrode deburring components, each group of ECM electrode deburring components comprises an anode conductive head for contacting the injector seat and a cathode rod for embedding in the oil through hole, the anode conductive head is connected to the anode rod, a liquid guide channel is arranged in the cathode rod, the liquid guide channel is connected to the liquid guide hole at the top of the cathode rod, the top of the cathode rod is connected to the cathode conductive head, the outer wall of the cathode rod is sleeved with an insulating sleeve, and a through hole is arranged at the position of the cathode rod and the insulating sleeve corresponding to the first groove, and the through hole is connected to the liquid guide channel and the outside of the insulating sleeve.

[0007] Furthermore, each set of ECM electrode deburring components also includes a lower template, the lower template is connected to the middle template, the middle template is connected to the positioning plate, and the cathode rod is located in the positioning plate;

[0008] The fixture also includes a base plate, a lower template is connected to the base plate, a first through hole is provided in the base plate, a second through hole is provided in the lower template, and a third through hole is provided in the middle template. The first through hole, the second through hole, the third through hole and the liquid guide channel are connected in sequence.

[0009] Furthermore, the anode conductive head is installed below the upper fixture plate, and the anode rod passes through the fourth through hole of the upper fixture plate and is connected to the anode conductive head;

[0010] A guide sleeve is arranged in the fourth through hole, a spring is arranged in the guide sleeve, a spring is arranged between the anode conductive head and the anode rod, one end of the spring is connected to the anode conductive head, and the other end of the spring is connected to the anode rod.

[0011] Further, a positioning pin for positioning the injector seat is provided on the top of the positioning plate;

[0012] and / or a cathode conductive seat is provided on the lower template, and the cathode conductive seat is connected to the electrolytic power supply and the cathode rod respectively;

[0013] And / or the positioning plate is also provided with a liquid baffle plate, and the position of the liquid baffle plate corresponds to that of the cathode conductive seat.

[0014] Furthermore, the fixture also includes a top plate, which is connected to a lifting plate via a pneumatic element, and the lifting plate is connected to an upper fixture plate via a connecting rod;

[0015] The bottom plate is provided with guide posts, and the upper fixture plate moves up and down along the guide posts driven by the lifting plate.

[0016] Furthermore, the pneumatic element is a cylinder, and the top plate is connected to the lifting plate through a cylinder tie rod.

[0017] Furthermore, the bottom of the base plate is connected to the workbench through a fixture positioning shaft or a fixture positioning sleeve.

[0018] Furthermore, after the cathode rod is embedded in the oil through hole, it corresponds to the cross hole position of the injector seat.

[0019] Furthermore, a first introduction channel for introducing electrolyte is provided in the workbench, and the first introduction channel is connected to the first through hole;

[0020] A first rubber sealing portion is provided at the connection between the first through hole of the bottom plate and the second through hole of the lower template; a second rubber sealing portion is provided at the connection between the second through hole of the lower template and the third through hole of the middle template;

[0021] And / or a straight-through pressure oil cup is provided on the guide column;

[0022] and / or the base plate, the lower formwork, the middle formwork and the positioning plate are all made of insulating materials;

[0023] And / or the positioning pin matches the notch on the outer wall of the injector;

[0024] And / or a guide sleeve is provided between the upper fixture plate and the guide column; a limiting sleeve for limiting the position of the guide column is provided on the bottom plate;

[0025] and / or anode rod connected to the top of the upper fixture plate.

[0026] Furthermore, the fixture includes four sets of ECM electrode deburring components.

[0027] In view of the above technical features, the utility model has the following advantages:

[0028] 1. The utility model is a fixture for deburring the ECM electrode of the injector seat. The anode is connected to the injector seat through the anode conductive head to connect the anode circuit. The burrs at the intersection and the burrs in the first groove are dissolved by the electrolyte (such as sodium nitrate) to achieve the effect of removing the burrs. In this way, the burrs between the intersecting inner holes of the parts and the burrs in the first groove can be effectively removed, excessive fillets are formed at the intersection, and the inner surface of the first groove is smooth, achieving the effect of removing the burrs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structure of the fuel injector seat in the specific embodiment 1 is shown in FIG. Figure 1 (stereoscopic image);

[0030] Figure 2 The structure of the fuel injector seat in the specific embodiment 1 is shown in FIG. Figure 2 (Supine figure);

[0031] Figure 3 is an AA cross-sectional view of the injector seat in specific embodiment 1;

[0032] Figure 4 The structure of the fuel injector seat in the specific embodiment 1 is shown in FIG. Figure 3 (stereoscopic image);

[0033] Figure 5 It is a structural schematic diagram of a fixture for deburring the ECM electrode of the injector seat in the specific embodiment 1 (front view, without showing the upper fixture plate);

[0034] Figure 6 It is a structural schematic diagram of a fixture for deburring the ECM electrode of the injector seat in the specific embodiment 1 (top view, without showing the upper fixture plate);

[0035] Figure 7 It is a structural schematic diagram of a fixture for deburring the ECM electrode of the injector seat in the specific embodiment 1 (right view, without showing the upper fixture plate);

[0036] Figure 8 is a development diagram of the outer side wall of the insulating layer in specific embodiment 1;

[0037] Fig. 9 is a structural schematic diagram (stereoscopic diagram) of the cathode rod and the insulating sleeve in specific embodiment 1;

[0038] Fig.10 is a schematic structural diagram (front view) of the cathode rod and the insulating sleeve in specific embodiment 1;

[0039] Fig.11 is a schematic diagram (sectional view) of the BB structure of the cathode rod and the insulating sleeve in the specific embodiment 1;

[0040] Fig.12 is a schematic structural diagram of the cathode rod and the insulating sleeve in the specific embodiment 1 (a cross-sectional view showing the injector seat);

[0041] Fig.13 It is a structural schematic diagram (front view) of the upper fixture plate, the anode rod, and the anode conductive head in specific embodiment 1;

[0042] Fig.14 It is a structural schematic diagram of the upper fixture plate, the anode rod, and the anode conductive head in the specific embodiment 1 (right view);

[0043] Fig.15 It is a structural schematic diagram (front view) of a fixture for deburring an ECM electrode of an injector seat in a specific embodiment 1;

[0044] Fig.16 It is a structural schematic diagram of a fixture for deburring the ECM electrode of the injector seat in specific embodiment 1 (right view).

[0045] In the figure: 1, injector seat; 1-1, oil hole; 1-2, first groove; 1-3, cross hole position; 1-4, notch;

[0046] 2. Bottom plate; 2-1. Guide column; 2-2. Guide sleeve; 2-3. Limit sleeve; 2-4. Straight-through pressure injection oil cup; 2-5. First through hole; 2-6. Fixture positioning shaft; 2-7. First rubber sealing part;

[0047] 3. Lower mold plate; 3-1. Second through hole; 3-2. Cathode conductive seat; 3-3. Second rubber sealing part;

[0048] 4. Middle template; 4-1. Third through hole;

[0049] 5. Positioning plate; 5-1. Positioning pin; 5-2. Liquid blocking plate; 5-2-1. Liquid drainage channel;

[0050] 6. Upper fixture plate; 6-1. Fourth through hole; 6-2. Guide sleeve;

[0051] 7. Lifting plate; 7-1. Connecting rod;

[0052] 8. Top plate;

[0053] 9, cathode rod; 9-1, cathode conductive head; 9-2, insulating sleeve; 9-3, through hole; 9-4, liquid guide channel; 9-5, liquid guide hole;

[0054] 10. Anode rod; 10-1. Anode conductive head; 10-2. Spring;

[0055] 11. Pneumatic components;

[0056] 12. Workbench; 12-1. First introduction channel. DETAILED DESCRIPTION

[0057] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0058] See also Figures 1 to 16 , Specific embodiment 1, this embodiment 1 provides a fixture for deburring the ECM electrode of the injector seat, the injector seat 1 is provided with an oil hole 1-1, the oil hole 1-1 turns to form a cross hole position 1-3, the inner wall of the oil hole 1-1 is provided with a first groove 1-2, the fixture includes at least one set of ECM electrode deburring components, each set of ECM electrode deburring components includes an anode conductive head 10-1 for contacting the injector seat 1 and a cathode rod 9 for embedding in the oil hole 1-1, the cathode rod 9 After being embedded in the oil through hole 1-1, corresponding to the cross hole position 1-3 of the injector seat 1, the anode conductive head 10-1 is connected to the anode rod 10, and a liquid conducting channel 9-4 is arranged inside the cathode rod 9, and the liquid conducting channel 9-4 is connected to the liquid conducting hole 9-5 at the top of the cathode rod. The top of the cathode rod 9 is connected to the cathode conductive head 9-1, and the outer wall of the cathode rod 9 is sleeved with an insulating sleeve 9-2. A through hole 9-3 is arranged at the position of the cathode rod 9 and the insulating sleeve 9-2 corresponding to the first groove 1-2, and the through hole 9-3 is connected to the liquid conducting channel 9-4 and the outside of the insulating sleeve 9-2.

[0059] In this embodiment 1, the fixture includes four groups of ECM electrode deburring components. Each group of ECM electrode deburring components also includes a lower template 3, the lower template 3 is connected to the middle template 4, the middle template 4 is connected to the positioning plate 5, and the cathode rod 9 is located in the positioning plate 5. The lower template 3 is provided with a cathode conductive seat 3-2, and the cathode conductive seat 3-2 is connected to the electrolytic power supply and the cathode rod 9 respectively.

[0060] The fixture also includes a base plate 2, and a lower template 3 is connected to the base plate 2. The bottom of the base plate 2 is connected to the workbench 12 through a fixture positioning shaft 2-6 or a fixture positioning sleeve. The base plate 2, the lower template 3, the middle template 4 and the positioning plate 5 are all made of insulating materials.

[0061] A positioning pin 5-1 for positioning the injector seat 1 is provided on the top of the positioning plate 5. The positioning pin 5-1 matches the notch 1-4 on the outer wall of the injector, so that the injector seat 1 can be quickly installed on the positioning plate 5. After installation, the positioning pin 5-1 can fix the position of the injector seat 1 to prevent the injector seat 1 from rotating.

[0062] A liquid baffle plate 5-2 is also provided on the positioning plate 5. The positions of the liquid baffle plate 5-2 and the cathode conductive seat 3-2 correspond to each other. The liquid baffle plate 5-2 and the positioning plate 5 form a liquid-repellent channel 5-2-1. The electrolyte flowing out of the oil hole 1-1 of the injector seat 1 is blocked by the liquid baffle plate 5-2 and flows to both sides of the liquid baffle plate 5-2, thereby preventing the electrolyte from flowing to the cathode conductive seat 3-2.

[0063] The tooling fixture also includes a top plate 8, which is connected to the lifting plate 7 through a pneumatic element 11, and the pneumatic element 11 is a cylinder. The lifting plate 7 is connected to the upper fixture plate 6 through a connecting rod 7-1, and the anode conductive head 10-1 is installed under the upper fixture plate 6. The anode rod 10 passes through the fourth through hole 6-1 of the upper fixture plate 6 and is connected to the anode conductive head 10-1. For example, the anode rod 10 is connected to the top of the upper fixture plate 6; a guide sleeve 6-2 is provided in the fourth through hole 6-1, and a spring 10-2 is provided in the guide sleeve 6-2. A spring 10-2 is provided between the anode conductive head 10-1 and the anode rod 10, and one end of the spring 10-2 is connected to the anode conductive head 10-1, and the other end of the spring 10-2 is connected to the anode rod 10. After the four injector seats 1 are sequentially mounted on the positioning plates 5 of the four groups of ECM electrode deburring assemblies, the lifting plate 7 moves downward with the four groups of anode conductive heads 10-1 and the anode rod 10 until the four anode conductive heads 10-1 are respectively against the corresponding injector seats 1 (or the anode conductive heads 10-1 press the injector seats 1). In this process, if the top heights of the four injector seats 1 are different, the top of the high injector seat 1 compresses the spring 10-2 through the anode conductive head 10-1 until the top of the lowest injector seat 1 is also against the corresponding anode conductive head 10-1, ensuring that the tops of the four injector seats 1 can be against the corresponding anode conductive head 10-1, ensuring that the four injector seats 1 can perform the ECM electrode deburring operation at the same time. That is to say, the design of the spring 10-2 is to make up for the defect of different heights of the four injector seats 1. The spring 10-2 is made of metal, and the anode conductive head 10-1 and the anode rod 10 are electrically conductive through the spring 10-2.

[0064] A guide column 2-1 is provided on the bottom plate 2, a straight-through pressure injection oil cup 2-4 is provided on the guide column 2-1, a guide sleeve 2-2 is provided between the upper fixture plate 6 and the guide column 2-1, and the straight-through pressure injection oil cup 2-4 helps the guide sleeve 2-2 to slide up and down smoothly along the guide column 2-1 with the upper fixture plate 6.

[0065] The bottom plate 2 is provided with a limiting sleeve 2-3 for limiting the guide column 2-1, and the limiting sleeve 2-3 ensures that the guide column 2-1 is stable in the vertical direction. The top plate 8 is connected to the lifting plate 7 through a cylinder pull rod, and the upper fixture plate 6 moves up and down along the guide column 2-1 under the drive of the lifting plate 7.

[0066] The bottom plate 2 is provided with a first through hole 2-5, the lower template 3 is provided with a second through hole 3-1, and the middle template 4 is provided with a third through hole 4-1. The first through hole 2-5, the second through hole 3-1, the third through hole 4-1 and the liquid guide channel 9-4 are connected in sequence. The workbench 12 is provided with a first introduction channel 12-1 for introducing electrolyte, and the first introduction channel 12-1 is connected to the first through hole 2-5. The electrolyte enters the workbench 12 through the first introduction channel 12-1, and then flows to the first through holes 2-5 of the bottom plate 2 in the four groups of ECM electrode deburring assemblies, and then flows into the second through hole 3-1 of the lower template 3, the third through hole 4-1 of the middle template 4, the liquid guide channel 9-4 and the liquid guide hole 9-5 of the cathode rod 9, and the oil through hole 1-1 in sequence from the four first through holes 2-5, and the first groove 1-2 of the injector seat 1 is deburred by the ECM electrode through the through hole 9-3 (as a conductive point), and the cathode electrode is deburred through the cathode electrode. The conductive head 9-1 (as a conductive point) performs ECM electrode deburring on the cross hole position 1-3 of the injector seat 1, and finally the electrolyte flows out of the injector seat 1 and / or the positioning plate 5 through the oil hole 1-1 of the injector seat 1 (for example, the horseshoe hole on the top of the injector seat 1). The electrolyte after flowing out is not conductive and / or does not discharge. In this process, the anode conductive head 10-1 is offset against the injector seat 1, and the electrolyte is energized, so that the ECM electrode deburring can be performed on the first groove 1-2 and the cross hole position 1-3 of the injector seat 1.

[0067] The portion of the cathode rod 9 covered by the insulating sleeve 9-2 will not discharge.

[0068] A first rubber sealing portion 2-7 is provided at the connection between the first through hole 2-5 of the bottom plate 2 and the second through hole 3-1 of the lower template 3 to prevent electrolyte overflow, and a second rubber sealing portion 3-3 is provided at the connection between the second through hole 3-1 of the lower template 3 and the third through hole 4-1 of the middle template 4 to prevent electrolyte overflow.

[0069] The gap between the injector seat and the anode conductive head, and the gap between the injector seat and the cathode conductive head are called the processing gap, the gap is 0.3mm, and the electrolyte flows through the processing gap at a high speed (6-30m / s) to ensure that the anode dissolution products and the heat generated when the electrolytic current passes through the electrolyte are taken away, and depolarization is performed. The anode conductive head and the cathode conductive head are respectively connected to the electrolytic power supply (generally 10-24V), and the current density of the processing gap between the two poles of the injector seat is as high as 10-100A / cm2 to decompose the burrs.

[0070] The utility model is a fixture for deburring the ECM electrode of the injector seat. The anode is connected to the injector seat 1 through the anode conductive head 10-1 to make contact with the anode circuit. The burrs at the intersection and the burrs in the first groove 1-2 are dissolved by the electrolyte (such as sodium nitrate) to achieve the effect of removing the burrs. In this way, the burrs between the intersecting inner holes of the parts and the burrs in the first groove 1-2 can be effectively removed, excessive fillets are formed at the intersection, and the inner surface of the first groove 1-2 is smooth, so as to achieve the effect of removing the burrs.

[0071] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fixture for deburring an ECM electrode of an injector seat, wherein an oil hole (1-1) is provided in the injector seat (1), and a first groove (1-2) is provided on the inner wall of the oil hole (1-1), characterized in that: The fixture comprises at least one set of ECM electrode deburring components, each set of ECM electrode deburring components comprises an anode conductive head (10-1) for contacting an injector seat (1) and a cathode rod (9) for embedding in an oil through hole (1-1), the anode conductive head (10-1) is connected to the anode rod (10), a liquid guide channel (9-4) is arranged inside the cathode rod (9), the liquid guide channel (9-4) is connected to a liquid guide hole (9-5) at the top of the cathode rod, the top of the cathode rod (9) is connected to the cathode conductive head (9-1), the outer wall of the cathode rod (9) is sleeved with an insulating sleeve (9-2), and a through hole (9-3) is arranged at a position of the cathode rod (9) and the insulating sleeve (9-2) corresponding to the first groove (1-2), and the through hole (9-3) is connected to the liquid guide channel (9-4) and the outside of the insulating sleeve (9-2).

2. According to claim 1, a fixture for deburring the ECM electrode of the injector seat, characterized in that: Each set of ECM electrode deburring components also includes a lower template (3), the lower template (3) is connected to a middle template (4), the middle template (4) is connected to a positioning plate (5), and the cathode rod (9) is located in the positioning plate (5); The fixture also includes a base plate (2), a lower template (3) connected to the base plate (2), a first through hole (2-5) provided in the base plate (2), a second through hole (3-1) provided in the lower template (3), a third through hole (4-1) provided in the middle template (4), and the first through hole (2-5), the second through hole (3-1), the third through hole (4-1) and the liquid guide channel (9-4) are sequentially connected.

3. According to claim 2, a fixture for deburring the ECM electrode of the injector seat, characterized in that: The anode conductive head (10-1) is installed below the upper fixture plate (6), and the anode rod (10) passes through the fourth through hole (6-1) of the upper fixture plate (6) and is connected to the anode conductive head (10-1); A guide sleeve (6-2) is provided in the fourth through hole (6-1), a spring (10-2) is provided in the guide sleeve (6-2), a spring (10-2) is provided between the anode conductive head (10-1) and the anode rod (10), one end of the spring (10-2) is connected to the anode conductive head (10-1), and the other end of the spring (10-2) is connected to the anode rod (10).

4. According to claim 3, a fixture for deburring the ECM electrode of the injector seat, characterized in that: A positioning pin (5-1) for positioning the fuel injector seat (1) is provided on the top of the positioning plate (5); and / or a cathode conductive seat (3-2) is provided on the lower template (3), and the cathode conductive seat (3-2) is connected to the electrolysis power source and the cathode rod (9) respectively; And / or the positioning plate (5) is also provided with a liquid blocking plate (5-2), and the positions of the liquid blocking plate (5-2) and the cathode conductive seat (3-2) correspond.

5. A fixture for deburring ECM electrodes of a fuel injector seat according to claim 4, characterized in that: The fixture also includes a top plate (8), the top plate (8) is connected to the lifting plate (7) via a pneumatic element (11), and the lifting plate (7) is connected to the upper fixture plate (6) via a connecting rod (7-1); A guide column (2-1) is provided on the bottom plate (2), and the upper fixture plate (6) moves up and down along the guide column (2-1) driven by the lifting plate (7).

6. A fixture for deburring ECM electrodes of a fuel injector seat according to claim 5, characterized in that: The pneumatic element (11) is a cylinder, and the top plate (8) is connected to the lifting plate (7) through a cylinder pull rod.

7. A fixture for deburring ECM electrodes of a fuel injector seat according to claim 6, characterized in that: The bottom of the base plate (2) is connected to the workbench (12) via a fixture positioning shaft (2-6) or a fixture positioning sleeve.

8. A fixture for deburring ECM electrodes of a fuel injector seat according to claim 7, characterized in that: After the cathode rod (9) is embedded in the oil through hole (1-1), it corresponds to the cross hole position (1-3) of the injector seat (1).

9. The fixture for deburring the ECM electrode of the injector seat according to claim 7, characterized in that: A first introduction channel (12-1) for introducing electrolyte is provided in the workbench (12), and the first introduction channel (12-1) is connected to the first through hole (2-5); A first rubber sealing portion (2-7) is provided at the connection between the first through hole (2-5) of the bottom plate (2) and the second through hole (3-1) of the lower template (3); a second rubber sealing portion (3-3) is provided at the connection between the second through hole (3-1) of the lower template (3) and the third through hole (4-1) of the middle template (4); and / or a guide column (2-1) is provided with a straight-through pressure injection oil cup (2-4); And / or the bottom plate (2), the lower template (3), the middle template (4) and the positioning plate (5) are all made of insulating materials; and / or the positioning pin (5-1) matches the notch (1-4) on the outer side wall of the fuel injector seat (1); and / or a guide sleeve (2-2) is provided between the upper fixture plate (6) and the guide column (2-1); a limiting sleeve (2-3) for limiting the position of the guide column (2-1) is provided on the bottom plate (2); And / or the anode rod (10) is connected to the top of the upper fixture plate (6).

10. A fixture for deburring ECM electrodes of a fuel injector seat according to any one of claims 1 to 9, characterized in that: The fixture includes four sets of ECM electrode deburring components.

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