Cathode assistive device for electrochemical corrosion

Abstract

The invention discloses a cathode assistive device for electrochemical corrosion. The cathode assistive device comprises a cathode body, a front guide sleeve and a supporting ring. The cathode body comprises a forming pipe section, a front pipe section and a rear pipe section. The front pipe section is provided with a plurality of first liquid outlet holes. The forming pipe section is a regular decagonal spiral column pipe capable of being spirally inserted into the regular decagonal spiral hole, and the regular decagonal spiral column pipe is provided with ten second spiral side faces. A tooth inserting groove is formed in the side face of each second spiral. The front guide sleeve comprises a sleeve section and a plurality of insertion teeth, and the insertion teeth can be spirally inserted into the insertion tooth grooves. When the cathode assistive device for electrochemical corrosion provided by the embodiment of the invention is adopted to process the circular tube, as the gear shaping grooves are gradually narrowed from the front end to the rear end of the regular decagonal spiral column tube until the gear shaping grooves are intersected at the vertex A, electrochemical corrosion can be carried out in a manner of gradually expanding towards two sides along with feeding from one line, and the electrochemical corrosion efficiency is improved. And no structural stress is generated in the machining process, the stability of the structure of the formed part is higher, and the machining process is simpler.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical processing equipment, and in particular to a cathode auxiliary tool for electrochemical corrosion. Background Art

[0002] Small-caliber artillery rifling is generally rectangular rifling. The side of the rifling of this structure pushes the projectile to rotate, and the shear force at the root of the rifling is large, which is easy to wear. With the requirements for the life and performance of artillery, reference Figures 1 to 3 As a new type of gun barrel inner bore structure, the polygonal rifling structure has the advantages of straight lines as positive lines and concentric arcs as negative lines. The positive lines push the projectile to rotate, and the force on the positive lines changes from shearing to extrusion, which greatly reduces the stress and effectively improves the barrel life. It has become a new research direction.

[0003] In the prior art, the polygonal rifling is hexagonal, processed by precision forging technology, and cold forged to form the inner rifling. This method is one of the modern methods for manufacturing barrel rifling, which is suitable for mass production. Its production method is to drill a hole slightly larger than the diameter of the negative bore in the barrel blank, put a high-hardness die rod with the opposite shape to the inner bore of the barrel (the position of the negative rifling is protruding) and running through the entire barrel in the hole, and then use a machine to hammer the outside of the barrel to squeeze the steel close to the die rod, and then pull out the die rod. The protruding part of the die rod becomes the negative rifling. However, it is difficult to completely eliminate the structural stress generated during the forging process of the round tube rifling using the process method in the related art, and the processing process is cumbersome and complicated. Summary of the invention

[0004] The embodiment of the present application provides a cathode auxiliary tool for electrochemical corrosion, which can solve the technical problems of residual stress in the molded part structure and complicated processing process in the prior art. The technical solution is as follows:

[0005] A cathode auxiliary tool for electrochemical corrosion is used for processing a regular decagonal spiral hole extending spirally along the central axis of the circular tube on the inner wall of a circular tube, the regular decagonal spiral hole having ten first spiral side surfaces distributed along the circumferential direction, the cathode auxiliary tool comprising: a cathode body, comprising a forming tube section, a front tube section connected to the front end of the forming tube section, and a rear tube section connected to the rear end of the forming section, and the forming tube section, the front tube section and the rear tube section are internally connected; the forming tube section is a regular decagonal spiral column tube, the regular decagonal spiral column tube can be spirally inserted into the regular decagonal spiral hole, and the difference between the regular decagonal spiral hole and the regular decagonal spiral hole is the sum of the etching amount H and the processing gap Δ, the regular decagonal spiral column tube has ten second spiral side surfaces; each of the second spiral side surfaces is provided with a tooth slot, and the tooth slot slots are gradually extended from the front end to the rear end of the regular decagonal spiral column tube. Gradually narrowing until intersecting at vertex A; the front end of the front tube section is used to connect the electrolyte tube, and the tail end of the rear tube section is provided with a plug for sealing the electrolyte; a front guide sleeve, the front guide sleeve includes a sleeve section at the front end, and a plurality of splines connected to the tail of the sleeve section, and the plurality of splines can be spirally inserted into the plurality of spline grooves; the outer wall of the sleeve section is provided with a sealing ring for forming a seal with the inner wall of the pipe to be processed; the front tube section has a plurality of first liquid outlets; a support ring, which is sleeved on the rear tube section, and an insulating gasket is provided between the cathode body, the outer diameter of the support ring is larger than the diameter of the inscribed circle corresponding to the rear end decagonal spiral cylinder section of the forming tube section, and smaller than the diameter of the inscribed circle corresponding to the regular decagonal spiral column tube; wherein the cathode body and the support ring are conductors, and the front guide sleeve is an insulator.

[0006] Optionally, it also includes a rear guide sleeve sleeved on the rear pipe section; the rear guide sleeve has a regular decagonal spiral cylinder that continuously transitions with the outer shape of the tail end of the formed pipe section, and the rear guide sleeve is an insulator.

[0007] Optionally, the rear end of the rear guide sleeve has an annular step offset along the central axis of the rear guide sleeve.

[0008] Optionally, at least one circle of second liquid outlet holes is provided on the formed tube segment, and each of the second liquid outlet holes extends radially; ends of each circle of the second liquid outlet holes away from the central axis of the formed tube segment are connected in series to form a circle of liquid guide grooves.

[0009] Optionally, the molded pipe segment has three circles of the second liquid outlet holes, and the three circles of the second liquid outlet holes are distributed along the axial direction of the molded pipe segment.

[0010] Optionally, each of the first liquid outlet holes is an oblique through hole inclined toward the formed tube section; each oblique through hole is located at the root of the tooth between two adjacent insert teeth; the front tube section has two circles of the first liquid outlet holes, the number of the first liquid outlet holes in each circle is 5, and the two circles of the first liquid outlet holes are centered on the central axis of the cathode body, and are evenly distributed and staggered.

[0011] Optionally, the formed pipe segment has a taper from the rear end to the front end.

[0012] Optionally, it also includes a clamping nut; the front pipe section has an external thread matching the clamping nut; the clamping nut is used to fix the front guide sleeve.

[0013] Optionally, there is a first fillet between adjacent first spiral side surfaces; there is a second fillet between adjacent second spiral side surfaces, and the second fillet gradually increases from the front end to the rear end of the forming tube segment; the initial value of the second fillet is 17 mm, and the final value is the difference between the first fillet and the erosion amount H and the processing gap Δ.

[0014] Optionally, the vertex has a third rounded corner.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0016] A cathode auxiliary tool for electrochemical corrosion comprises: a cathode body, a front guide sleeve and a support ring. When processing a regular decagonal spiral hole on the inner wall of a circular tube, the circular tube to be processed is fixed on the fixed part of the workbench, the electrolyte connecting pipe is connected to the front tube section of the cathode body, the cathode auxiliary tool is connected to the feeding part of the workbench, and the cathode auxiliary tool is set to feed in a manner of circumferential rotation along the central axis direction of the circular tube, wherein the lead of the circumferential rotation is equal to the lead of the regular decagon of the circular tube to be processed. Since the rear tube section is provided with a plug and the front tube section is provided with a first liquid outlet, the electrolyte can be sprayed from the first liquid outlet under the pressure of the electrolyte in the electrolyte pipeline. When the cathode body is continuously pushed toward the circular tube in a spiral, due to the unequal gap between the two surfaces, the current density is the largest at the place with the smallest gap, and the anode circular tube dissolves fastest at this place. Therefore, the inner wall of the circular tube is continuously dissolved according to the shape of the cathode body, and at the same time, the electrolysis product (such as electrolytic mud) is washed away by the electrolyte until the inner wall of the circular tube forms the shape of the cathode body. Since the tooth slot gradually narrows from the front end to the rear end of the regular decagonal spiral column tube until it intersects at vertex A, the protruding portion for electrochemical corrosion between two adjacent tooth slots gradually widens from the front end to the rear end of the regular decagonal spiral column tube. In this case, electrochemical corrosion can start from a line and be etched away in a manner that gradually expands to both sides as the feed progresses. When the cathode auxiliary tool for electrochemical corrosion provided in the embodiment of the present application is used to process the round tube, no structural stress is generated during the electrochemical corrosion process, so the structure of the molded part is more stable and the processing process is simpler.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a stereoscopic view of a formed part having decagonal rifling machined from a round tube;

[0020] Figure 2 yes Figure 1 A longitudinal cross-sectional view of

[0021] Figure 3 yes Figure 1 End view of

[0022] Figure 4 It is a front view of the cathode auxiliary tool for electrochemical corrosion provided in an embodiment of the present application;

[0023] Figure 5 yes Figure 4 Cross-section at the middle BB;

[0024] Figure 6 yes Figure 1 A longitudinal section of a cathode auxiliary tool for electrochemical corrosion;

[0025] Figure 7 yes Figure 1 Exploded view of cathode auxiliary tool used in electrochemical corrosion;

[0026] Figure 8 It is a three-dimensional diagram of the cathode body in the cathode auxiliary tool for electrochemical corrosion provided in an embodiment of the present application;

[0027] Fig. 9 It is a three-dimensional diagram of a front guide sleeve in a cathode auxiliary tool for electrochemical corrosion provided in an embodiment of the present application;

[0028] Fig.10 It is a three-dimensional diagram of a rear guide sleeve in a cathode auxiliary tool for electrochemical corrosion provided in an embodiment of the present application;

[0029] Fig.11 It is a stereoscopic view of a compression nut in a cathode auxiliary tool for electrochemical corrosion provided in an embodiment of the present application.

[0030] Description of Reference Numerals

[0031] 1. Round tube; 101. Regular decagonal spiral hole; 1011. First spiral side surface; 1012. First fillet; 2. Cathode body; 201. Forming tube section; 2011. Second spiral side surface; 2012. Tooth slot; 2013. Second fillet; 2014. Third fillet; 202. Front tube section; 203. Rear tube section; 204. Second liquid outlet; 205. Liquid guide groove; 206. First liquid outlet; 3. Plug; 4. Front guide sleeve; 401. Sleeve section; 402. Tooth slot; 5. Sealing ring; 6. Support ring; 7. Insulating gasket; 8. Rear guide sleeve; 801. Annular step; 9. Compression nut; A. Vertex; H. Erosion amount; Δ. Processing clearance. DETAILED DESCRIPTION

[0032] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0033] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the "upper" and "lower" of the corresponding parts in the use state relative to the direction of gravity, and "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding parts' own contours. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0034] Small-caliber artillery rifling is generally rectangular rifling. The side of the rifling of this structure pushes the projectile to rotate, and the shear force at the root of the rifling is large, which is easy to wear. With the requirements for the life and performance of artillery, reference Figures 1 to 3 As a new type of gun barrel inner bore structure, the polygonal rifling structure has the advantages of straight lines as positive lines and concentric arcs as negative lines. The positive lines push the projectile to rotate, and the force on the positive lines changes from shearing to extrusion, which greatly reduces the stress and effectively improves the barrel life. It has become a new research direction.

[0035] A cathode auxiliary tool for electrochemical corrosion, used for processing a regular decagonal spiral hole 101 extending spirally along the central axis of the circular tube 1 on the inner wall of the circular tube 11, Figures 1 to 3 The regular decagonal spiral hole 101 has ten first spiral side surfaces 1011 distributed along the circumferential direction.

[0036] refer to Figures 4 to 7 The cathode auxiliary tool includes: a cathode body 2, a front guide sleeve 4 and a support ring 6.

[0037] Among them, reference Figure 8The cathode body 2 may include a formed tube segment 201, a front tube segment 202 connected to the front end of the formed tube segment 201, and a rear tube segment 203 connected to the rear end of the formed tube segment, and the formed tube segment 201, the front tube segment 202 and the rear tube segment 203 are connected to each other; the formed tube segment 201 is a regular decagonal spiral column tube, which can be spirally inserted into the regular decagonal spiral hole 101, and the difference between the regular decagonal spiral hole 101 and the etched amount H and the processing gap Δ are different, and the regular decagonal spiral column tube has ten second spiral side faces 2011; refer to Figure 8 Each second spiral side surface 2011 is provided with a tooth groove 2012, and the tooth groove 2012 gradually narrows from the front end to the rear end of the regular decagonal spiral column tube until it intersects at the vertex A; the rear end of the regular decagonal spiral column tube has a complete decagonal spiral cylinder segment; the front end of the front tube segment 202 is used to connect the electrolyte tube, and the tail end of the rear tube segment 203 is provided with a plug 3 for sealing the electrolyte.

[0038] refer to Fig. 9 The front guide sleeve 4 includes a sleeve section 401 at the front end, and a plurality of insert teeth 402 connected to the tail of the sleeve section 401, and the plurality of insert teeth 402 can be spirally inserted into a plurality of insert tooth grooves 2012; the outer wall of the sleeve section 401 is provided with a sealing ring 5 for forming a seal with the inner wall of the pipe to be processed. The front pipe section 202 has a plurality of first liquid outlet holes 206; the support ring 6 is sleeved on the rear pipe section 203, and an insulating gasket 7 is provided between the support ring 6 and the cathode body 2, and the outer diameter of the support ring 6 is larger than the diameter of the inscribed circle corresponding to the rear end decagonal spiral cylindrical section of the forming pipe section 201, and smaller than the diameter of the inscribed circle corresponding to the regular decagonal spiral cylindrical tube; wherein the cathode body 2 and the support ring 6 are conductors, and the front guide sleeve 4 is an insulator. In this case, after the front guide sleeve 4 is assembled with the cathode body 2, the insert teeth 402 of the front guide sleeve 4 are inserted into the insert tooth grooves 2012 of the cathode body 2, and the groove bottom of the insert tooth grooves 2012 is covered by the insert teeth 402, leaving only the protruding portion between the two insert tooth grooves 2012 exposed for electrochemical corrosion.

[0039] In the above embodiment, when processing the regular decagonal spiral hole 101 on the inner wall of the round tube 1, the round tube 1 to be processed is fixed on the fixed part of the workbench, the electrolyte connecting pipe is connected to the front tube section 202 of the cathode body 2, the cathode auxiliary tool is connected to the feeding part of the workbench, and the cathode auxiliary tool is set to feed along the central axis direction of the round tube 1 in a manner of circumferential rotation, wherein the lead of the circumferential rotation is equal to the lead of the regular decagon of the round tube 1 to be processed. The front tube section 202 is extended into one end of the round tube 1 to be processed, the sealing ring 5 is pressed against the inner wall of the round tube 1 to be processed, the round tube 1 is connected to the positive pole of the power supply, the cathode body 2 is connected to the negative pole of the power supply, and the feeding part of the workbench is started to feed the cathode auxiliary tool. Since the rear tube section 203 is provided with a plug 3, and the front tube section 202 is provided with a plurality of first liquid outlets 206, the electrolyte can be sprayed out from the first liquid outlets 206 under the pressure of the electrolyte in the electrolyte pipeline. When the cathode body 2 is continuously spirally advanced toward the circular tube 1, due to the unequal gaps between the two surfaces, the current density is the largest where the gap is the smallest, and the anode circular tube 1 dissolves fastest at this location. Therefore, the inner wall of the circular tube 1 is continuously dissolved according to the shape of the cathode body 2, and at the same time, the electrolysis product is washed away by the electrolyte until the inner wall of the circular tube 1 forms the same shape as the cathode body 2. Since the tooth slot 2012 gradually narrows from the front end to the rear end of the regular decagonal spiral column tube until it intersects at vertex A, the protruding portion for electrochemical corrosion between two adjacent tooth slots 2012 gradually widens from the front end to the rear end of the regular decagonal spiral column tube. In this case, the electrochemical corrosion can start from a line and be etched away in a manner that gradually expands to both sides as the feed proceeds. The circular tube 1 is processed using the cathode auxiliary tool for electrochemical corrosion provided in the embodiment of the present application, and no structural stress is generated during the electrochemical corrosion process, so the structural stability of the molded part is higher and the processing process is simpler.

[0040] In the examples of this application, reference is made to Fig.10 The cathode auxiliary tool for electrochemical corrosion also includes a rear guide sleeve 8 sleeved on the rear pipe section 203; the rear guide sleeve 8 has a regular decagonal spiral cylinder that continuously transitions with the tail end shape of the formed pipe section 201, and the rear guide sleeve 8 is an insulator.

[0041] refer to Figure 4 In this case, since the rear guide sleeve 8 and the profile of the formed tube section 201 are smoothly transitioned and the spiral direction is consistent, the cathode body 2 can be auxiliary supported so that the cathode body 2 can maintain a high coaxiality with the round tube 1. Fig.10 The rear end of the rear guide sleeve 8 has an annular step 801 offset to the central axis of the rear guide sleeve 8. This design can prevent the electrolyte from suddenly dropping in pressure after flowing through the processing area, making the flow field unstable, thereby affecting the forming accuracy and surface quality of the inner wall of the round tube 1.

[0042] In order to make the electrolyte more uniform in the processing area, in the embodiment of the present application, reference Figures 6 to 8 At least one circle of second liquid outlet holes 204 is provided on the forming tube segment 201 , and each second liquid outlet hole 204 extends radially; the ends of each circle of second liquid outlet holes 204 away from the central axis of the forming tube segment 201 are connected in series to form a circle of liquid guide grooves 205 .

[0043] In order to make the electrolyte more evenly distributed, refer to Figures 6 to 8 The forming tube segment 201 has three circles of second liquid outlet holes 204, and the three circles of second liquid outlet holes 204 are distributed along the axial direction of the forming tube segment 201. Specifically, the second liquid outlet holes 204 can be set in the protruding part between the adjacent tooth slots 2012 along the spiral direction of the forming tube segment 201, and the second liquid outlet holes 204 are evenly distributed along the central axis of the forming tube segment 201; from the front end to the rear end, the number of the three circles of the second liquid outlet holes 204 set on the protruding part between each adjacent tooth slot 2012 is 1, 1, 2, and the number of the second liquid outlet holes 204 in each circle is 10, 10, 20 respectively; the second liquid outlet holes 204 are used to replenish new electrolyte, which can effectively solve the problem of poor surface quality or even short circuit of workpiece machining due to increased water flow area and decreased electrolyte flow rate.

[0044] In the examples of this application, reference is made to Figure 8 Each first liquid outlet hole 206 is an oblique through hole inclined toward the forming tube section 201; each oblique through hole is located at the root of the tooth between two adjacent insert teeth 402; the front tube section 202 has two circles of first liquid outlet holes 206, and the number of first liquid outlet holes 206 in each circle is 5. The two circles of first liquid outlet holes 206 are centered on the central axis of the cathode body 2, and are evenly distributed and staggered. Through such a design, on the one hand, continuous electrolyte can be output to the processing area, thereby preventing "dry burning" or short circuit. On the other hand, the continuously replenished electrolyte can promptly flush away the electrolysis products (such as electrolytic mud) generated during the electrolysis process.

[0045] In the examples of this application, reference is made to Figures 6 to 8 The formed pipe section 201 has a taper from the rear end to the front end. This design facilitates the cathode auxiliary tool to enter the workpiece round pipe 1 as a whole, and on the other hand, during electrochemical etching, the etching amount gradually increases as the cathode auxiliary tool moves forward, and finally forms a machining profile of the required inner hole, which can reduce the risk of short circuit and obtain a larger etching amount.

[0046] In the examples of this application, reference is made to Figure 4 , Figure 6 , Figure 7 and Fig.11The cathode auxiliary tool for electrochemical corrosion may further include a clamping nut 9; the front pipe section 202 has an external thread matching the clamping nut 9. The clamping nut 9 is used to fix the front guide sleeve 4. In this way, the front guide sleeve 4 and the cathode body 2 can be reliably connected together, thereby ensuring the consistency of the electrochemical corrosion area during the electrochemical corrosion process in the entire processing process.

[0047] In the examples of this application, reference is made to Figures 1 to 3 , there is a first fillet 1012 between adjacent first spiral side surfaces 1011; accordingly, in the embodiment of the present application, refer to Figure 8 There is a second fillet 2013 between adjacent second spiral side surfaces 2011, and the second fillet 2013 gradually increases from the front end to the rear end of the forming tube segment 201; the initial value of the second fillet 2013 is 17 mm, and the final value is the difference between the first fillet 1012 and the erosion amount H and the processing gap Δ.

[0048] In the examples of this application, reference is made to Figure 8 , a third fillet 2014 is provided at the vertex A. By means of such a design, the current is not easily concentrated during the electrochemical corrosion process of the round tube 1, thereby preventing the round tube 1 from being damaged by excessive local current.

[0049] refer to Figures 1 to 11The implementation principle of the present application is as follows: when processing the regular decagonal spiral hole 101 on the inner wall of the round tube 1, the round tube 1 to be processed is fixed on the fixed part of the workbench, the electrolyte connecting pipe is connected to the front tube section 202 of the cathode body 2, the cathode auxiliary tool is connected to the feeding part of the workbench, and the cathode auxiliary tool is set to feed in a manner of circumferential rotation along the central axis direction of the round tube 1, wherein the lead of the circumferential rotation is equal to the lead of the regular decagon of the round tube 1 to be processed. The front tube section 202 is extended into one end of the round tube 1 to be processed, the sealing ring 5 is pressed against the inner wall of the round tube 1 to be processed, the round tube 1 is connected to the positive pole of the power supply, the cathode body 2 is connected to the negative pole of the power supply, and the feeding part of the workbench is started to feed the cathode auxiliary tool. Since the rear tube section 203 is provided with a plug 3, and the forming tube section 201 is provided with a plurality of circles of second liquid outlet holes 204, the electrolyte can be sprayed out from the second liquid outlet holes 204 under the pressure of the electrolyte in the electrolyte pipeline. When the cathode body 2 is continuously spirally advanced toward the circular tube 1, due to the unequal gaps between the two surfaces, the current density is the largest where the gap is the smallest, and the anode circular tube 1 dissolves fastest at this location. Therefore, the inner wall of the circular tube 1 is continuously dissolved according to the shape of the cathode body 2, and the electrolysis products are washed away by the electrolyte until the inner wall of the circular tube 1 forms the shape of the cathode body 2. Since the tooth slot 2012 gradually narrows from the front end to the rear end of the regular decagonal spiral column tube until it intersects at the vertex A, the protruding portion for electrochemical corrosion between two adjacent tooth slots 2012 gradually widens from the front end to the rear end of the regular decagonal spiral column tube. In this case, the electrochemical corrosion can start from a line and be etched away in a manner that gradually expands to both sides as the feed is advanced, thereby increasing the electrochemical corrosion rate and improving the quality of the electrochemical corrosion. During the electrochemical corrosion process, the electrolyte can be uniformly transported to the electrochemical corrosion area through the first liquid outlet hole 201 provided in the forming tube section 201 and the second liquid outlet hole 204 provided in the front tube section 202, and the electrolysis products (such as electrolytic mud) generated by the corrosion can be promptly washed out. The circular tube 1 is processed by using the cathode auxiliary tool for electrochemical corrosion provided in the embodiment of the present application. No structural stress is generated during the electrochemical corrosion process, so the structural stability of the molded part is higher and the processing process is simpler.

[0050] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0052] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A cathode auxiliary tool for electrochemical corrosion, used for processing a regular decagonal spiral hole (101) spirally extending along the central axis of the circular tube (1) on the inner wall of a circular tube (1), wherein the regular decagonal spiral hole (101) has ten first spiral side surfaces (1011) distributed along the circumferential direction, characterized in that: The cathode auxiliary tool comprises: The cathode body (2) comprises a formed tube segment (201), a front tube segment (202) connected to the front end of the formed tube segment (201), and a rear tube segment (203) connected to the rear end of the formed tube segment, and the formed tube segment (201), the front tube segment (202) and the rear tube segment (203) are internally connected; The formed tube section (201) is a regular decagonal spiral column tube, which can be spirally inserted into the regular decagonal spiral hole (101), and the difference between the regular decagonal spiral column tube and the regular decagonal spiral hole (101) is the sum of the erosion amount H and the processing gap Δ, and the regular decagonal spiral column tube has ten second spiral side surfaces (2011); each of the second spiral side surfaces (2011) is provided with a toothing groove (2012), and the toothing groove (2012) gradually narrows from the front end to the rear end of the regular decagonal spiral column tube until they intersect at the vertex (A); The front end of the front pipe section (202) is used to connect to the electrolyte tube, and the tail end of the rear pipe section (203) is provided with a plug (3) for sealing the electrolyte; A front guide sleeve (4), the front guide sleeve (4) comprising a sleeve section (401) at the front end, and a plurality of insert teeth (402) connected to the rear end of the sleeve section (401), the plurality of insert teeth (402) being capable of being spirally inserted into a plurality of insert tooth grooves (2012); the outer wall of the sleeve section (401) is provided with a sealing ring (5) for forming a seal with the inner wall of a circular tube (1) to be processed; the front tube section (202) has a plurality of first liquid outlet holes (206); A support ring (6) is sleeved on the rear tube section (203), and an insulating gasket (7) is provided between the support ring (6) and the cathode body (2), wherein the outer diameter of the support ring (6) is larger than the diameter of the inscribed circle corresponding to the rear end decagonal spiral cylindrical section of the forming tube section (201), and smaller than the diameter of the inscribed circle corresponding to the regular decagonal spiral cylindrical tube; The cathode body (2) and the support ring (6) are conductors, and the front guide sleeve (4) is an insulator.

2. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: It also comprises a rear guide sleeve (8) sleeved on the rear pipe section (203); the rear guide sleeve (8) has a regular decagonal spiral cylinder that continuously transitions with the tail end shape of the formed pipe section (201); the rear guide sleeve (8) is an insulator.

3. The cathode auxiliary tool for electrochemical corrosion according to claim 2, characterized in that: The rear end of the rear guide sleeve (8) has an annular step (801) offset along the central axis of the rear guide sleeve (8).

4. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: The molded pipe section (201) is provided with at least one circle of second liquid outlet holes (204), and each of the second liquid outlet holes (204) extends in the radial direction; The ends of each circle of the second liquid outlet holes (204) away from the central axis of the forming pipe section (201) are connected in series to form a circle of liquid guide grooves (205).

5. The cathode auxiliary tool for electrochemical corrosion according to claim 4, characterized in that: The molded pipe section (201) has three circles of the second liquid outlet holes (204), and the three circles of the second liquid outlet holes (204) are distributed along the axial direction of the molded pipe section (201).

6. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: Each of the first liquid outlet holes (206) is an oblique through hole inclined toward the formed pipe section (201); each oblique through hole is located at the tooth root between two adjacent insert teeth (402); The front tube section (202) has two circles of the first liquid outlet holes (206), each circle of the first liquid outlet holes (206) has five first liquid outlet holes (206), and the two circles of the first liquid outlet holes (206) are evenly distributed and staggered around the central axis of the cathode body (2).

7. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: The formed pipe section (201) has a taper from the rear end to the front end.

8. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: It also includes a clamping nut (9); the front pipe section (202) has an external thread matching the clamping nut (9); and the clamping nut (9) is used to fix the front guide sleeve (4).

9. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: There is a first fillet (1012) between adjacent first spiral side surfaces (1011); there is a second fillet (2013) between adjacent second spiral side surfaces (2011), and the second fillet (2013) gradually increases from the front end to the rear end of the forming tube section (201); the initial value of the second fillet (2013) is 17 mm, and the final value is the difference between the first fillet (1012), the erosion amount H, and the processing gap Δ.

10. The cathode auxiliary tool for electrochemical corrosion according to claim 1, characterized in that: The vertex (A) has a third rounded corner (2014).

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