Electrolytic and micro-blade machining combined tool

Abstract

The application discloses an electrolysis and micro-blade machining composite tool, which comprises a tool head, a tool cathode, a tool rod and a conductive ring, the tool head, the tool cathode and the tool rod are sequentially connected, the conductive ring is in the shape of a through cylinder, and the tool cathode and the tool rod are located in the cavity of the conductive ring; the tool head has an outer ring, a middle ring and an inner ring structure, the outer ring and the inner ring are arranged in the form of a ring and are provided with series of micro-blades, a plurality of through grooves are arranged at the middle ring of the tool head in a spaced mode, and a plurality of bosses of the tool cathode correspond to the through grooves of the middle ring of the tool head; the tool rod comprises an upper section of the tool rod and a lower section of the tool rod, the outer wall of the lower section of the tool rod is provided with the conductive ring, and the hollow structure of the upper section of the tool rod is used for guiding liquid to flow to the tool head and the machining part of the tool cathode. Through the electrolytic machining and the micro-blade machining, the workpiece oxide skin can be removed, the high-efficiency electrolysis can be carried out, the uneven surface phenomenon caused by single electrolytic machining can be overcome, the machining surface precision is high, the machining temperature and force are very small, and the workpiece surface residual stress and deformation are small and controllable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolytic machining and micro-cutting mechanical compound machining, and more particularly to an electrolytic and micro-blade machining compound tool. BACKGROUND

[0002] Titanium alloy, high-temperature alloy and other metal materials have become indispensable materials for some key parts in the aerospace, medical devices, energy, and power industries, but such materials often have poor machinability and are difficult to machine.

[0003] When machining titanium alloy, high-temperature alloy and other metal thin-walled parts by traditional milling and grinding methods, the cutting efficiency is high and the machining surface quality is good, but the cutting heat, cutting force and stress and strain are also more obvious, which can cause large residual stress and cause thin-walled workpiece deformation. In addition, there are problems of obvious tool wear and low tool life, which makes the manufacturing cost high.

[0004] The advantages of electrolytic milling machining in difficult-to-cut material parts are mainly small mechanical force, good machining flexibility, and low tool wear, so the stress generated is low and the machining deformation is small, which is suitable for machining thin-walled large planes. The single electrolytic milling machining is still difficult to meet the production needs of engineering precision parts in terms of surface quality, and the main problem is that the tool cathode structure cannot avoid secondary electrolytic machining on the machined surface, which reduces the machining surface quality. In order to eliminate the surface influence of secondary electrolytic machining, the surface is often re-processed by traditional milling and grinding methods after electrolytic machining, but this will cause large residual stress and cause thin-walled workpiece deformation. In addition, there is an oxide film on the surface of titanium alloy and other workpieces, which will have a great impact on the electrolytic efficiency if not removed.

[0005] By combining electrolytic machining and multi-micro-blade micro-cutting machining, the stress generated by multi-micro-blade cutting machining is low, the deformation is small, and the machining precision is high, which is combined with the characteristics of electrolytic machining. The compound machining of the two can fully play their respective roles and make up for the defects of single form machining. SUMMARY

[0006] The present application aims to overcome the low processing precision of the existing mechanical electrolytic milling device for the surface quality of the workpiece, and provides an electrolytic and micro-blade machining compound tool, which can reduce the influence of secondary electrolytic machining and speed up the electrolytic machining speed by using the combined machining method of outer ring micro-blade micro-cutting, middle ring electrolytic machining and inner ring micro-blade micro-cutting. The layered machining of metal workpiece materials can improve the surface precision of the machined object, and the tool wear is small and the service life is long.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is:

[0008] The application provides an electrolysis and micro-blade machining composite tool, which comprises a tool head, a tool cathode and a tool rod connected in sequence, and a through electrically conductive ring, preferably a through cylindrical electrically conductive ring, arranged on the outer side of the circumferential sidewall of the tool rod; the end face of the tool head away from the tool rod comprises an outer ring, a middle ring and an inner ring structure, the outer ring and the inner ring are each provided with an annular micro-blade, the middle ring is provided with a plurality of through grooves at intervals, the tool cathode is provided with a plurality of bosses at one end, and the bosses can extend into the through grooves; the end of the tool rod away from the tool head is a liquid inlet, the tool head is provided with a liquid outlet in communication with the liquid inlet, and the liquid outlet comprises a first liquid outlet arranged at the geometric center of the inner ring and a second liquid outlet arranged between the bosses and the outer ring.

[0009] The working principle of the application is as follows: the tool head is fixedly connected with the tool cathode and the tool rod through screws or other connecting elements capable of achieving the connecting effect, and the three are coaxial and synchronously rotated. During machining, the upper segment of the tool rod is connected with an electrolyte supply device, the electrolyte enters the tool head through the liquid inlet at one end of the tool head, and then is discharged through the first and second liquid outlets at the bottom, and the electrolyte can flow in a specific direction and be stably supplied. Since the first liquid outlet is circular and the second liquid outlets are uniformly distributed, the electrolyte flows uniformly during the process of flowing to the tool head and the tool cathode, so that the electric field distribution of the machining area is uniform, and the flatness of the machining surface is improved.

[0010] Further, the outer ring, the middle ring and the inner ring structure are respectively an outer ring micro-blade structure, a middle ring connecting structure and an inner ring micro-blade structure, the cutting depth of the inner ring micro-blade structure is greater than that of the outer ring micro-blade structure, and the middle ring connecting structure connects the outer ring micro-blade structure and the inner ring micro-blade structure. On the one hand, the tool cathode and the electrolyte perform electrolytic machining on the workpiece to remove part of the material, and the inner ring and the outer ring micro-blade structure remove a small part of the material, so that the machining precision is improved and the low thermal deformation effect is ensured. On the other hand, the outer ring micro-blade structure, the middle ring electrolytic machining plane and the inner ring micro-blade structure machining plane are distributed in steps, the structure can simultaneously perform layered machining, the outer ring micro-blade structure removes the oxide film on the surface of the workpiece to facilitate electrolytic machining, and the inner ring micro-blade structure can further improve the surface precision of the workpiece on the basis of electrolytic machining. Moreover, under the scouring of the electrolyte, the debris generated during machining can be discharged with the electrolyte, so that the debris is prevented from being blocked, and the temperature during machining is low.

[0011] Further, the tool head is made of an insulating hard tool material and is connected with the tool cathode and the tool rod through screws. When a hard metal material is used as the tool head, the tool head of the milling cutter will be corroded by the stray current from the middle ring tool cathode due to the electric conductivity of the hard metal material. Therefore, the tool head is made of a nearly insulating hard material such as diamond, ceramic CBN or the like, and the screws are made of an insulating and corrosion-resistant material, so that the tool head can be prevented from being corroded by the stray current during machining.

[0012] Further, the number of the first micro-edge arranged on the outer ring micro-edge structure is any number between 15 and 100, and the first micro-edges are distributed equidistantly on the circumference outside the disc of the tool head, and a gap is arranged between two adjacent first micro-edges. When the electrolyte is discharged, the first micro-edges are washed to prevent the machining products from adhering to the cutting edge, and the first micro-edges can also be cooled to avoid high temperature in the cutting area.

[0013] Further, the number of the second micro-edge arranged on the inner ring micro-edge structure is any number between 15 and 100, and the second micro-edges are distributed equidistantly on the circumference outside the center of the tool head, and a gap is arranged between two adjacent second micro-edges. As one of the preferred solutions, the first micro-edges and the second micro-edges are staggered, and when the tool head rotates, the electrolyte discharged from the first outlet can be discharged more quickly from the gap between two adjacent first micro-edges and second micro-edges. Similar to the outer ring micro-edge structure, the electrolyte can be discharged from the gap between two adjacent second micro-edges to wash the surface of the second micro-edges to remove the machining products and cool down.

[0014] Further, the cutting depth of the outer ring micro-edge structure is 0.01mm-0.1mm, and the cutting depth of the inner ring micro-edge structure is 0.01mm-2mm, and the cutting depth of the inner ring micro-edge structure is greater than that of the outer ring micro-edge structure. In this way, when the outer ring micro-edge structure is used for primary cutting, the oxide film on the surface of the metal workpiece can be removed, and the workpiece can be partially cut, and then the inner ring micro-edge structure is used for secondary cutting to further cut the metal workpiece, thereby improving the machining precision of the surface of the metal workpiece.

[0015] Further, the first micro-edges on the outer ring micro-edge structure can be arranged as multi-ring stepped micro-edges, and the inner ring micro-edge structure can also be arranged as multi-ring stepped micro-edges, that is, the cutting edges of the tool head are arranged in a stepped distribution with the inner part being higher and the outer part being lower, and the number of steps is any number between 2 and 10, thereby reducing the cutting depth each time and further reducing the stress generated by mechanical cutting. As one of the preferred solutions, the middle ring connecting structure can assist the electrolytic machining to cut, increase the speed of electrolytic machining, and improve the machining efficiency.

[0016] Further, 2-10 through grooves are arranged in a ring distribution on the middle ring connecting structure, and a through hole is arranged in the solid part between two adjacent through grooves for penetrating a screw, and the screw is used to connect the tool head, the tool cathode, and the tool rod. As one of the preferred solutions, when the tool head, the tool cathode, and the tool rod are connected by the screw, in order to make the contact surface more fit and increase the contact area to ensure the stable delivery of the current, the tool cathode and the lower part of the tool rod are respectively provided with chamfers to be positioned and connected with the tool head and the conductive ring through the inclined surfaces, which can ensure the stability of the current and prevent the electrolyte from overflowing.

[0017] Further, the tool cathode base is cylindrical, the bosses are equidistantly distributed on one end of the tool cathode, and the number of bosses is 2-10. After the tool cathode is connected with the tool bit, the bosses pass through the through slot of the tool bit and leave a liquid gap as the second liquid outlet. As one of the preferred solutions, the tool cathode can be made into multiple tool cathodes with different boss heights, so as to facilitate the replacement of the tool cathode, adjust the distance between the tool cathode and the machining surface by changing the height of the boss, and prevent the influence of tool cathode loss on electrolysis results.

[0018] Further, the tool bar includes a tool bar upper section and a tool bar lower section connected with the tool cathode. The conductive ring is arranged on the outer side of the tool bar lower section. The hollow structure of the tool bar upper section can guide the liquid to the machining position of the tool bit and the tool cathode. As one of the preferred solutions, a plurality of through holes are arranged on the center of the tool bar lower section along the circumference as the second liquid inlet. The electrolyte flows from top to bottom (i.e. from the tool bar to the tool bit) in the tool, and then flows along the surface of the workpiece to the four directions, so as to wash away the debris generated in the cutting process of the outer ring and the inner ring micro blade structure.

[0019] The beneficial effects of the present application are:

[0020] 1. The present application adopts a combined machining method, i.e. electrolytic machining and micro-cutting mechanical machining are simultaneously performed, which can overcome the surface unevenness phenomenon generated by single electrolytic machining, reduce the material wear of mechanical machining, make the surface of the machining position have higher precision, and make the loss of the machining device smaller. In addition, the working temperature of the micro blade milling cutter is low, and the residual stress and deformation of the workpiece surface are small and controllable;

[0021] 2. The layered machining mode of micro-mechanical cutting-electrolytic machining-micro-mechanical cutting is adopted. The outer ring micro blade removes the oxide film on the surface of the workpiece. The tool cathode and the electrolyte perform electrolytic machining on the surface of the workpiece to remove part of the material. The inner ring micro blade further micro-cuts the surface to improve the surface precision of the workpiece.

[0022] 3. The electrolyte is uniformly distributed, and the current density is uniformly distributed. The inner ring and the outer ring limit the electrolyte in a certain area, so that the electrolytic machining is stable, the stray current is small, and the machining surface quality is higher. At the same time, the machining products can flow through the gap between the micro-cutting blades to flush the micro-cutting chips and discharge the machining area, so as to avoid blockage. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 It is a schematic diagram of the structure observed from one end of the present application;

[0025] Figure 3 It is a schematic diagram of the structure observed from the other end of the present application;

[0026] Figure 4 Fig. 1 is a schematic view of the structure of the tool bar of the present application;

[0027] Figure 5 Fig. 2 is a sectional view along A-A of Fig. 1; Figure 2

[0028] Figure 6 Fig. 3 is a schematic view of the structure of the tool head provided in Example 4.

[0029] In the drawings:

[0030] 1 - tool head; 101 - outer ring cutting edge; 102 - middle ring connecting structure; 103 - inner ring cutting edge; 104 - partial first cutting structure; 105 - partial second cutting structure; 2 - tool cathode; 3 - tool shank; 301 - upper section; 302 - lower section; 4 - conductive ring; 5 - first liquid outlet; 6 - first liquid inlet; 7 - screw; 8 - second liquid inlet; 9 - second liquid outlet; 10 - liquid collecting groove

[0031] Figure 5 The arrow direction is the flow direction of electrolyte during machining. DETAILED DESCRIPTION

[0032] The present application will be further described below in conjunction with specific embodiments. The drawings are merely intended to illustrate, and should not be understood as a limitation to the present patent; in order to better illustrate the embodiments, some components in the drawings will be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures in the drawings and their descriptions can be omitted.

[0033] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "front", "back", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only for illustrative purposes, and should not be understood as a limitation to the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and should not be understood as indicating or implying the relative importance of the technical features indicated or the number of technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features.

[0034] Example 1:

[0035] Referring to Figure 1 and​Figure 5 The embodiment provides an electrolysis and micro-blade machining composite tool, which comprises a tool head 1, a tool cathode 2, a tool rod 3 and a conductive ring 4. The conductive ring 4 is in the shape of a through cylinder, and the two ends are provided with inclined surface positioning structures. The tool rod 3 is located in the cavity of the conductive ring 4, and the hollow structure of the upper section 301 of the tool rod can guide the flow of liquid to the liquid inlet of the lower section 302, and then to the machining parts of the tool head 1 and the tool cathode 2 through the through hole of the lower section 302. During machining, the electrolyte flows in the through hole towards the machining surface and participates in electrolytic machining. One end of the conductive ring 4 is connected with the tool rod 3, and the other end is connected with the tool cathode 2, which plays a role in transmitting current and limiting the flow path of the electrolyte to prevent overflow. The tool head 1, the tool cathode 2 and the tool rod 3 are connected in sequence, and the tool cathode 2 and the tool rod 3 are located in the cavity of the conductive ring 4. Since the tool head 1, the tool cathode 2 and the tool rod 3 are connected in sequence and coaxially rotate synchronously, the upper section 301 of the tool rod is connected to the rotating shaft during use, and the suitable rotating speed is adjusted, so that machining can be realized.

[0036] When cutting titanium alloy and other difficult-to-machine materials, it is very important to improve the wear resistance of the tool, which is the guarantee of ensuring the machining accuracy for a long time. Reasonable cooling and lubrication is the key to reducing tool wear and improving tool life. The gap between the tool cathode 2 and the tail of the tool rod 3 in the embodiment is an annular liquid collecting groove 10, and the electrolyte is gathered here. The second liquid outlet 9 is equidistantly and annularly distributed, that is, there is sufficient and stable pressure to drive the electrolyte, and then the electrolyte flows out uniformly during the machining process, so that the electric field distribution of the machining area is uniform, and the flatness of the machining surface is improved. In the embodiment, the liquid inlet of the lower section 302 of the tool rod includes a first liquid inlet 6 and a second liquid inlet 8, and the bottom of the tool head 1 includes a first liquid outlet 5 and a second liquid outlet 9. Referring to Figure 2 and Figure 5 , during machining, the electrolyte flows into the inner cavity of the tool head 1 from the first liquid inlet 6 and the second liquid inlet 8, and then flows out from the first liquid outlet 5 and the second liquid outlet 9. Among them, the electrolyte flowing out of the second liquid inlet 8 is collected in the liquid collecting groove 10, and then flows out from the second liquid outlet 9 of the tool head 1 to perform electrolysis with the machining surface first. The electrolyte flowing out of the first liquid outlet 5 passes through the micro-cutting edge of the tool head 1 and mixes with the electrolyte flowing out of the second liquid outlet 9, and then reacts with the machining surface by electrolysis, and then washes and cools the micro-cutting edges of the outer ring micro-blade structure 101 and the inner ring micro-blade structure 103 on the tool head 1. The tool cathode 2 and the electrolyte perform electrolysis on the workpiece to remove part of the material, and the micro-cutting edges on the tool head 1 remove a small part of the material by mechanical micro-cutting, which improves the machining effect. More specifically, the outer ring micro-blade structure 101 rough machining can remove the oxide film on the surface of the workpiece and part of the material, and the inner ring micro-blade structure 103 performs fine machining / finishing, which can further improve the surface precision of the workpiece.

[0037] At the same time, under the flushing of the electrolyte, the debris generated by micro-cutting machining can be discharged with the electrolyte, avoiding blockage and making the temperature in the cutting process lower. During the composite machining process, the electrolyte removes part of the material, while the micro-cutting mechanical milling process only removes a small part of the material, and the hardness of this small part of the material is reduced under the influence of the electrolytic machining, so the wear rate of the micro-blades of the outer ring micro-blade structure 101 and the micro-blades of the inner ring micro-blade structure 103 is reduced, which can prolong the service life of the tool bit.

[0038] Example two:

[0039] Referring to Figure 2 On the basis of example one, in this embodiment, the tool bit 1 is composed of an outer ring micro-blade structure 101, a middle ring connecting structure 102 and an inner ring micro-blade structure 103, and the tool bit 1 is made of hard diamond material and is connected with the tool cathode and the tool shank through screws. When hard metal material is used as the tool bit, because of its electrical conductivity, the tool bit part of the milling cutter will be corroded by the stray current from the middle ring tool cathode, and the use of nearly insulating ceramic CBN hard material can effectively prevent such problems. The upper section 301 of the tool shank is a hollow structure connected with the electrolyte conveying device, and the central through hole of the lower section 302 of the tool shank is a first liquid inlet 6, and three through holes around it are second liquid inlets 8 for guiding the electrolyte to flow to the tool bit and the tool cathode machining part. The electrolyte enters the inside of the tool bit 1 from the first liquid inlet 6, and then flows out from the first liquid outlet 5 close to the tool bit 1, and the outer periphery of the first liquid outlet 5 is the inner ring micro-blade structure 103. The number of first micro-blades on the inner ring micro-blade structure 103 is 30, which are equidistantly arranged at the bottom of the tool bit 1, and a gap is left between adjacent two first micro-blades. When machining the workpiece, the tool bit 1 rotates at high speed, and the electrolyte flowing out of the first liquid outlet 5 quickly flows out through the gap left between adjacent two first micro-blades, and at the same time, the inner ring micro-blade structure 103 is flushed, preventing the machining products from adhering to the inner ring micro-blade structure 103, and also playing a role in heat dissipation for the inner ring micro-blade structure 103, avoiding too high temperature in the cutting area. Similar to the inner ring micro-blade structure 103, the second micro-blades on the outer ring micro-blade structure 101 are equidistantly arranged along the outer ring circumference of the tool bit 1, and the number is 30, and a gap is also left between adjacent two second micro-blades.

[0040] Example three:

[0041] Referring to Figure 3 or Figure 4In this embodiment, the tool cathode 2 is made of a material with good electrical conductivity. In order to make the tool cathode contact other parts more closely and increase the contact area to ensure stable current transmission, the tool cathode is provided with chamfers at both ends and the lower segment of the tool holder, which are connected to the tool bit and the conductive ring through inclined surfaces to ensure the stability of the current and prevent electrolyte from overflowing. The tool cathode 2 is provided with chamfers at both ends, which are positioned and matched with the tool bit 1 and the tool holder 3. The tool cathode 2 is connected to the tool bit 1 through a screw 7. The lower segment 302 of the tool holder 3 is chamfered at the bottom and is positioned and matched with the tool cathode 2 through an inclined surface. The conductive ring 4 is positioned by the inclined surfaces at both ends of the tool holder 3 and the tool cathode 2 and is clamped and fixed by the screw 7. The tool is rotated by rotating the upper segment 301 of the tool holder through a rotating mechanism. In this example, the center of the lower segment of the tool holder is provided with three through holes as the second liquid inlet, and the electrolyte flows from the inside of the tool from top to bottom (i.e. from the tool holder to the tool bit). After flowing out, it flows along the surface of the workpiece to the surrounding, washing away the debris generated in the cutting process of the outer ring and inner ring micro-edge structure. The first liquid inlet 6 and the first liquid outlet 5 are on the same axis and have the same size. The second liquid inlet 8 and the second liquid outlet 9 are not one-to-one corresponding. Therefore, a concave structure is arranged as a liquid collecting groove 10 at a small part of the electrolyte before entering the tool cathode 2. The liquid collecting groove 10 formed by the cooperation of the tool cathode 2 and the lower segment 302 of the tool holder is annular, which can connect the second liquid inlet 8 and the second liquid outlet 9. In this way, it is not necessary to align the second liquid inlet 8 and the second liquid outlet 9. It is only necessary to ensure that the area of the second liquid inlet 8 is greater than the area of the second liquid outlet 9 to maintain the stable flow of the electrolyte. The number and size of the second liquid inlet 8 can be determined according to the size of the second liquid outlet 9 during machining. In this example, the area of the second liquid outlet 9 is about 30mm 2 , and the second liquid inlet 8 can be provided with three through holes with a diameter of 4mm or four to five through holes with a diameter of 3mm.

[0042] It should be noted that the gap between the tool bit 1, the tool cathode 2 and the tool holder 3 is filled with electrolyte during machining. If ordinary connecting parts are used, they may be corroded by electrolysis. Therefore, the screws are made of insulating and corrosion-resistant materials, which can avoid corrosion and damage caused by stray current during machining.

[0043] Example Four

[0044] Reference Figure 6The embodiment provides another electrolysis and micro-blade machining composite tool, which comprises a tool head 1 and a tool cathode 2, and further comprises a conductive ring 4 penetrating through two ends, the tool head 1 is composed of an outer ring micro-blade structure 101, a middle ring connecting structure 102 and an inner ring micro-blade structure 103, the outer ring and the inner ring are both provided with annular micro-blades, the middle ring is provided with a plurality of through grooves at intervals, the tool cathode 2 is provided with a plurality of bosses at one end, and the bosses can extend into the through grooves; the tool head 1 is provided with a liquid outlet communicated with a liquid inlet, the liquid outlet comprises a first liquid outlet 5 arranged at the geometric center of the inner ring and a second liquid outlet 9 arranged between the bosses and the outer ring. The first micro-blade on the outer ring micro-blade structure 101 is provided with a plurality of annular step-distributed micro-blades, and the second micro-blade on the inner ring micro-blade structure 103 can also be provided with a plurality of annular step-distributed micro-blades, the number of steps is 2, and the cutting depth of each micro-blade is reduced by layered cutting to reduce the stress and deformation generated. The solid part on the middle ring connecting part 102 can be provided with a third micro-blade on a local first cutting structure 104 and a fourth micro-blade on a local second cutting structure 105, which are connected with the inner ring micro-blade structure 103 and the outer ring micro-blade structure 101 respectively, and the cutting blades jointly form a step distribution with an inner high and an outer low. There is a gap between the two adjacent micro-cutting blades, and the through groove between the two spaced-apart micro-cutting blades is penetrated by the boss of the tool cathode 2. The third micro-blade and the fourth micro-blade are staggered, and when the tool head rotates, the electrolyte discharged from the first liquid outlet can be discharged from the gap between the two adjacent micro-blades more quickly. The electrolyte can be discharged from the gap between the two adjacent micro-cutting blades, flush the surface of the micro-cutting blade, and play a role in removing the machining products and reducing the temperature.

[0045] In the specific contents of the foregoing specific embodiments, any technically non-contradictory combination of technical features can be made, and in order to make the description brief, all possible combinations of the foregoing technical features are not described, however, as long as the combination of technical features does not exist, it should be considered as the scope of the present disclosure.

[0046] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An electrochemical and micro-EDM combined tooling apparatus, characterized by, The tool head (1), the tool cathode (2) and the tool rod (3) are sequentially connected, and the conductive ring (4) penetrating through both ends is arranged outside the circumferential side wall of the tool rod (3); The end face of the tool head (1) away from the tool rod (3) comprises an outer ring, a middle ring and an inner ring structure, the outer ring and the inner ring are each provided with an annular micro blade, the middle ring is provided with a plurality of through grooves at intervals, one end of the tool cathode (2) is provided with a plurality of bosses, and the bosses can protrude into the through grooves; one end of the tool rod (3) away from the tool head (1) is a liquid inlet, and the tool head (1) is provided with a liquid outlet communicating with the liquid inlet, and the liquid outlet comprises a first liquid outlet (5) arranged at the geometric center of the inner ring and a second liquid outlet (9) arranged between the boss and the outer ring. The outer ring, the middle ring and the inner ring structure are respectively an outer ring micro blade structure (101), a middle ring connecting structure (102) and an inner ring micro blade structure (103), and the cutting depth of the inner ring micro blade structure (103) is greater than that of the outer ring micro blade structure (101).

2. The electrochemical and micro-EDM combined tool according to claim 1, wherein, The tool head (1) is made of insulating hard tool material.

3. The electrochemical and micro-EDM combined tool according to claim 1 or 2, wherein, The outer ring micro blade structure (101) is provided with first micro blades at equal intervals in a circle, the number of the first micro blades is any number between 15 and 100, and a gap is arranged between adjacent two first micro blades.

4. The electrochemical and micro-EDM combined tool according to claim 3, wherein, The inner ring micro blade structure (103) is provided with second micro blades at equal intervals in a circle, the number of the second micro blades is any number between 15 and 100, and a gap is arranged between adjacent two second micro blades.

5. The electrochemical and micro-EDM combined tool according to claim 4, wherein, The first micro blades on the outer ring micro blade structure (101) are multi-ring step distribution micro blades, and the second micro blades on the inner ring micro blade structure (103) are also multi-ring step distribution micro blades, and the number of the steps is any number between 2 and 10.

6. The electrochemical and micro-EDM combined tool according to claim 1 or 5, wherein, The cutting depth of the outer ring micro blade structure (101) is 0.01mm-0.1mm, and the cutting depth of the inner ring micro blade structure (103) is 0.01mm-2mm.

7. The electrochemical and micro-EDM combined tool according to claim 6, wherein, The middle ring connecting structure (102) is provided with 2-10 through grooves distributed in a circle, a through hole is arranged in the solid part between adjacent two through grooves for penetrating a screw (7), and the screw (7) is used for connecting the tool head (1), the tool cathode (2) and the tool rod (3).

8. The electrochemical and micro-EDM combined tool according to claim 1 or 7, wherein, The base of the tool cathode (2) is cylindrical, the bosses are distributed at equal intervals in a circle at one end of the tool cathode (2) and the number of the bosses is 2-10, and after the tool cathode (2) is connected with the tool head (1), the bosses pass through the through grooves of the tool head (1) and leave a liquid outlet gap as the second liquid outlet (9).

9. The electrochemical and micro-EDM combined tool according to claim 1, wherein, The tool rod (3) comprises a tool rod upper section (301) and a tool rod lower section (302) connected with the tool cathode (2), the conductive ring (4) is arranged outside the tool rod lower section (302), and the hollow structure of the tool rod upper section (301) can guide liquid to the machining parts of the tool head (1) and the tool cathode (2).

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