An electrode dresser tool

Abstract

The application relates to the technical field of automobile welding, and discloses an electrode sharpener cutter, which comprises a cutter seat, a top cutter is fixedly arranged in the cutter seat, a side cutter is fixedly arranged in the cutter seat through bolts, the top cutter and the side cutter are both provided with a plurality of top cutters and side cutters, upper cutters and lower cutters are arranged on the upper surface and the lower surface of the top cutter respectively, and upper side cutters and lower side cutters are arranged on the outer surface of the side cutter respectively. The electrode sharpener cutter can effectively solve the problems in the prior art that traditional sharpener seats are usually fixed on equipment through bolts, a plurality of bolts need to be tightened or loosened by using tools every time the sharpener seat is replaced, the operation is complicated and time-consuming, bolt holes are prone to wear and wire slipping after being disassembled and assembled for many times, the stability and precision of the sharpener seat installation are affected, and in the processing scene of multiple varieties and small batches, frequent replacement of cutters can significantly reduce the equipment utilization and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive welding technology, and more specifically to an electrode grinding tool. Background Technology

[0002] An electrode grinder is a high-efficiency processing device that removes excess material from a workpiece by rotating a cutting edge, thereby obtaining parts with the required size and precision. It is used for electrode caps in resistance welding. During use, electrode caps may wear, deform, or even be damaged due to discharge loss, collisions, or the need to adjust their size according to the processing conditions. This requires the use of a tool to grind and restore the appearance of the electrode.

[0003] In existing technologies, traditional handheld electrode grinders typically fix the tools to the equipment with bolts. Each time the tool holder is changed, multiple bolts need to be tightened or loosened with tools, which is cumbersome and time-consuming. After repeated disassembly and assembly, the bolt holes are prone to wear and stripping, affecting the stability and accuracy of the tool holder installation. In multi-variety, small-batch processing scenarios, frequent tool changes will significantly reduce the utilization rate of the equipment and production efficiency. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an electrode regrinding tool that can effectively solve the problem that in the existing technology, the traditional regrinding tool holder is usually fixed to the equipment by bolts. Each time the tool holder is replaced, multiple bolts need to be tightened or loosened with tools, which is cumbersome and time-consuming. After repeated disassembly and assembly, the bolt holes are prone to wear and stripping, which affects the stability and accuracy of the tool holder installation. In the case of multi-variety, small-batch processing scenarios, frequent tool replacement will significantly reduce equipment utilization and production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides an electrode grinder tool, comprising:

[0007] A tool holder, wherein a top tool is fixedly installed inside the tool holder, and a side tool is fixedly installed inside the tool holder by bolts. Several top tools and side tools are provided. The upper and lower surfaces of the top tool are respectively provided with an upper cutting edge and a lower cutting edge. The outer surfaces of the side tools are respectively provided with an upper side edge and a lower side edge. Several upper cutting edges and upper side edges form a first grinding zone capable of milling the electrode head by rotation. Several lower cutting edges and lower side edges form a second grinding zone capable of milling the electrode head by rotation.

[0008] A transmission box, wherein a bevel gear is rotatably connected inside the transmission box, and a connecting seat is fixedly connected to the inner circumference of the bevel gear. The connecting seat is provided with a connecting component for placing a tool holder through an annular groove formed on its inner circumference.

[0009] Furthermore, the connecting assembly includes a limiting block fixedly connected to the outer circumferential surface of the tool holder. The connecting seat has a placement groove communicating with the interior of the annular groove. An arc-shaped inclined plate is slidably connected inside the placement groove. A guide rod is provided on the outer surface of the arc-shaped inclined plate. The end of the guide rod away from the arc-shaped inclined plate passes through the connecting seat and is fixedly connected to a connecting plate. A pressure plate that fits against the outer surface of the limiting block is fixedly connected to the outer surface of the arc-shaped inclined plate. An elastic element is provided on the outer surface of the guide rod. One side of the limiting block adopts an arc surface design, and the other side adopts a flat surface design. The elastic element is preferably a high-strength compression spring.

[0010] Furthermore, the transmission box is rotatably connected to a bevel gear that meshes with the outer surface of the bevel gear, and the outer surface of the transmission box is provided with a centering structure for fixing the electrode rod.

[0011] Furthermore, the centering structure includes a semi-ring seat, two of which are symmetrically distributed around the transmission box. A lower pressure rod is rotatably connected to the side of the semi-ring seat away from the transmission box. An upper pressure rod is rotatably connected to the transmission box via a support frame on its outer surface. Multiple lower and upper pressure rods are provided. A pressing member is provided on the side of the lower and upper pressure rods closest to the center line of the semi-ring seat.

[0012] Furthermore, a gear one is fixedly connected to the upper surface of the lower pressure rod, and a gear two is fixedly connected to the lower surface of the upper pressure rod. The semi-ring seat is rotatably connected to a rotating plate via an electric sliding groove formed on its outer circumference. The inner circumference of the rotating plate is provided with a toothed groove that meshes with the outer surface of the gear one. A toothed ring plate that meshes with the outer surface of the gear two is fixedly connected to the inner circumference of the rotating plate.

[0013] Furthermore, the rotating plate adopts an open design, and the lower pressure rod and the upper pressure rod are staggered in the circumferential direction with the semi-ring seat axis as the center. In the vertical direction, the lower pressure rod and the upper pressure rod are distributed vertically with the gear as the center. The rotation directions of the lower pressure rod and the upper pressure rod are opposite.

[0014] Furthermore, the pressing component includes a pressing block, and a connecting column that passes through the upper pressing rod is fixedly connected to the outer surface of the pressing block. A spring is sleeved on the outer surface of the connecting column. A ball bearing is rotatably connected to the pressing block through a horizontal shaft set inside it. The outer surface of the ball bearing is made of rubber.

[0015] Furthermore, a chip collection groove is provided on the outer surface of the transmission box, and a dust collection pipe that communicates with the inside of the chip collection groove is fixedly connected to one side of the transmission box.

[0016] The technical solution provided by this invention has the following advantages compared with the prior art:

[0017] This invention comprises a tool holder, a transmission box, a connecting seat, and connecting components. The top and side blades in the tool holder are symmetrically distributed along their upper and lower axes, forming independently controllable first and second grinding zones. The upper and lower cutting edges, as well as the lower and lower side blades, can be designed with differentiated materials and geometries to suit different shapes and machining requirements. For different machining levels, the first grinding zone can be equipped with carbide cutting edges for roughing, while the second grinding zone can use diamond-coated cutting edges for precision polishing, improving the electrode head's finishing effect. For different machining shapes, the tool holder significantly enhances its versatility and applicability. When installing the tool holder, it is pushed into the transmission box and rotated. The engagement of the annular groove and the limiting block, along with the pre-tightening force of the elastic element, achieves a rapid locking connection between the tool holder and the connecting seat. The limiting action of the annular groove and the pressing action of the pressure plate ensure precise positioning of the tool holder in both the vertical and horizontal directions. Without the need for external tools, operators can easily install and disassemble the tool holder, improving work efficiency and avoiding the cumbersome and time-consuming process of fixing and disassembling conventional equipment using bolts, nuts, and other tools. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the detachable structure of the transmission box according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the separation structure of the central structure in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure in the unfolded state of an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the connection component according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the connecting seat, the tool holder, the top tool, and the side tool according to an embodiment of the present invention;

[0025] Figure 7 This is a cross-sectional structural diagram of the transmission box according to an embodiment of the present invention;

[0026] Figure 8This is a schematic diagram of the connecting assembly, top blade, and side blade according to an embodiment of the present invention;

[0027] Figure 9 This is a cross-sectional structural diagram of the transmission box from another perspective according to an embodiment of the present invention.

[0028] The labels in the diagram represent: 1. Tool holder; 11. Top tool; 111. Upper cutting edge; 112. Lower cutting edge; 12. Side tool; 121. Upper side edge; 122. Lower side edge; 13. First grinding zone; 14. Second grinding zone; 2. Transmission box; 21. Bevel gear; 22. Connecting seat; 221. Annular groove; 222. Placement groove; 23. Connecting assembly; 231. Limiting block; 232. Arc inclined plate; 233. Guide rod; 234. Connecting plate; 235. Pressure plate. ; 236. Elastic component; 24. Bevel gear; 25. Centering structure; 251. Semi-ring seat; 2511. Electric slide rail; 252. Lower pressure rod; 253. Support frame; 254. Upper pressure rod; 255. Gear one; 256. Gear two; 257. Rotating plate; 2571. Gear groove; 258. Gear ring plate; 26. Pressing component; 261. Pressing block; 2611. Ball bearing; 262. Connecting column; 263. Spring; 27. Chip collection groove; 271. Dust collection pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] The present invention will be further described below with reference to embodiments.

[0031] Example:

[0032] Please see Figures 1-9 The present invention provides a technical solution: an electrode grinder tool, comprising:

[0033] Tool holder 1, with a top tool 11 fixedly installed inside the tool holder 1 and a side tool 12 fixedly installed inside the tool holder 1 by bolts. There are several top tools 11 and side tools 12. The upper and lower surfaces of the top tool 11 are respectively provided with an upper cutting edge 111 and a lower cutting edge 112. The outer surfaces of the side tools 12 are respectively provided with an upper side cutting edge 121 and a lower side cutting edge 122. The several upper cutting edges 111 and upper side cutting edges 121 rotate to form a first grinding area 13 capable of milling the electrode head. The several lower cutting edges 112 and lower side cutting edges 122 rotate to form a second grinding area 14 capable of milling the electrode head.

[0034] The transmission box 2 has a bevel gear 21 rotatably connected inside it. A connecting seat 22 is fixedly connected to the inner circumference of the bevel gear 21. The connecting seat 22 has a connecting component 23 for placing the tool holder 1 through an annular groove 221 formed on its inner circumference.

[0035] The connecting assembly 23 includes a limiting block 231 fixedly connected to the outer circumferential surface of the tool holder 1. The connecting seat 22 has a placement groove 222 that communicates with the interior of the annular groove 221. An arc-shaped inclined plate 232 is slidably connected inside the placement groove 222. A guide rod 233 is provided on the outer surface of the arc-shaped inclined plate 232. One end of the guide rod 233 away from the arc-shaped inclined plate 232 passes through the connecting seat 22 and is fixedly connected to a connecting plate 234. A pressure plate 235 that fits against the outer surface of the limiting block 231 is fixedly connected to the outer surface of the arc-shaped inclined plate 232. An elastic element 236 is provided on the outer surface of the guide rod 233. One side of the limiting block 231 adopts an arc surface design, and the other side adopts a flat surface design. The elastic element 236 is preferably a strong compression spring.

[0036] The transmission box 2 is rotatably connected to a bevel gear 24 that meshes with the outer surface of the bevel gear 21. The outer surface of the transmission box 2 is provided with a centering structure 25 for fixing the electrode rod.

[0037] The centering structure 25 includes a semi-ring seat 251. Two semi-ring seats 251 are provided and symmetrically distributed with the transmission box 2 as the center. A lower pressure rod 252 is rotatably connected to the side of the semi-ring seat 251 away from the transmission box 2. An upper pressure rod 254 is rotatably connected to the transmission box 2 through a support frame 253 provided on its outer surface. Multiple lower pressure rods 252 and upper pressure rods 254 are provided. A pressing member 26 is provided on the side of the lower pressure rod 252 and upper pressure rod 254 near the center line of the semi-ring seat 251.

[0038] Gear 255 is fixedly connected to the upper surface of the lower pressure rod 252, and gear 256 is fixedly connected to the lower surface of the upper pressure rod 254. The semi-ring seat 251 is rotatably connected to the rotating plate 257 through the electric sliding groove 2511 opened on its outer circumference. The inner circumference of the rotating plate 257 is provided with a tooth groove 2571 that meshes with the outer surface of gear 255. The inner circumference of the rotating plate 257 is fixedly connected to the toothed ring plate 258 that meshes with the outer surface of gear 256.

[0039] The rotating plate 257 adopts an open design. The lower pressure rod 252 and the upper pressure rod 254 are staggered in the circumferential direction with the axis of the semi-ring seat 251 as the center. The lower pressure rod 252 and the upper pressure rod 254 are distributed vertically with the gear 255 as the center. The rotation directions of the lower pressure rod 252 and the upper pressure rod 254 are opposite.

[0040] The pressing component 26 includes a pressing block 261. A connecting post 262 that passes through the upper pressing rod 254 is fixedly connected to the outer surface of the pressing block 261. A spring 263 is sleeved on the outer surface of the connecting post 262. A ball bearing 2611 is rotatably connected to the pressing block 261 through a horizontal shaft set inside it. The outer surface of the ball bearing 2611 is made of rubber.

[0041] The outer surface of the transmission box 2 is provided with a chip collection groove 27, and a dust collection pipe 271 that communicates with the inside of the chip collection groove 27 is fixedly connected to one side of the transmission box 2.

[0042] The process of installing the tool holder 1 into the transmission box 2:

[0043] In practical applications, a number of top cutters 11 and side cutters 12 are fixedly installed inside the cutter holder 1. Both the side cutters 12 and the top cutters 11 are axially symmetrical objects and are axially symmetrically distributed in the vertical direction. The upper cutting edge 111 is located on the upper surface of the top cutter 11, the lower cutting edge 112 is located on the lower surface of the top cutter 11, the upper side edge 121 is located in the upper half of the side cutter 12, and the lower side edge 122 is located in the lower half of the side cutter 12. A plurality of upper cutting edges 111 and upper side cutting edges 121 are rotated to form a first grinding area 13 capable of milling an electrode head, and a plurality of lower cutting edges 112 and lower side cutting edges 122 are rotated to form a second grinding area 14 capable of milling an electrode head. The surface shape and material of the upper cutting edges 111 and lower cutting edges 112 can be designed differently, and the surface shape and material of the upper side cutting edges 121 and lower side cutting edges 122 can also be designed differently. The first grinding area 13 and the second grinding area 14 formed thereby can be areas for grinding electrodes of different shapes, or the first grinding area 13 and the second grinding area 14 can be used for different grinding degrees, with one being used for rough grinding and the other for fine grinding.

[0044] Align the tool holder 1, with the side cutter 12 and top cutter 11 installed, with the annular groove 221 of the connecting seat 22. The annular groove 221 is divided into a vertical part and a horizontal part. The area of ​​the groove opening of the vertical part of the annular groove 221 is larger than the area of ​​the limiting block 231, and the height of the horizontal part of the annular groove 221 is equal to the thickness of the limiting block 231. Push the limiting block 231 into the vertical part of the annular groove 221 until it reaches the bottom of the inner wall. Then rotate the tool holder 1 around its axis on the horizontal plane and continue to move along the horizontal part of the annular groove 221.

[0045] In the initial state, the elastic element 236 is in the unfolded state. The elastic element 236 preferably adopts a strong compression spring. The lower end of the elastic element 236 is connected to the bottom end of the inner wall of the placement groove 222. When the elastic element 236 is in the unfolded state, it drives the arc inclined plate 232 and the pressure plate 235 to be in the unfolded state, which is inside the vertical part of the annular groove 221.

[0046] When the tool holder 1 rotates, driving the limiting block 231 to rotate, the outer surface of the arc side of the limiting block 231 contacts the upper surface of the arc inclined plate 232. As the rotation angle of the tool holder 1 increases, the arc inclined plate 232 moves downward under the action of the limiting block 231. The arc inclined plate 232 and the guide rod 233 slide axially, and the elastic element 236 inside the placement groove 222 gradually begins to compress, generating a preload. Until the arc side of the limiting block 231 is completely in contact with the inner wall surface of the annular groove 221, the limiting block 231 completely disengages from the upper surface of the arc inclined plate 232. At this time, the arc inclined plate 232 is no longer suppressed by external force. Under the action of the elastic element 236, it drives the guide rod 233 and the pressure plate 235 to rise rapidly. The pressure plate 235 and the arc inclined plate 232 are once again inside the annular groove 221. In this state, the plane side of the limiting block 231 is completely in contact with the outer surface of the pressure plate 235. Under the action of the limiting block 231, the tool holder 1 is limited by the annular groove 221 in the vertical direction and by the inner wall surface of the annular groove 221 and the pressure plate 235 in the horizontal direction, realizing the quick locking connection between the tool holder 1 and the connecting seat 22 without the need for external tools, ensuring that the tool holder 1 is firmly installed and accurately positioned.

[0047] The process of positioning the electrode rod:

[0048] Initially, the centering structure 25 is in a retracted state. The semi-annular seat 251, rotating plate 257, multiple upper pressure rods 254 and multiple lower pressure rods 252 form an annular opening. The cavity enclosed by this structure can be used to place the electrode rod. The annular opening design can satisfy the insertion of the electrode rod from the vertical direction, and can also satisfy the horizontal movement of the tool holder 1 transmission box 2 in the case of narrow space, so that the electrode rod is placed in the centering structure 25, and thus inserted into the tool holder 1 from the opening of the centering structure 25. It has a wide range of applications. The centering structure 25 is set on both the upper and lower sides of the transmission box 2.

[0049] The electrode rod is placed in the center area of ​​the semi-annular seat 251 of the centering structure 25, and the drive motor in the electric slide 2511 is started to drive the rotating plate 257 to rotate. Taking the centering structure 25 located at the top as an example, gear one 255 and gear two 256 are on the same horizontal plane and are staggered along the semi-annular rotating plate 257. When the rotating plate 257 rotates clockwise, the toothed groove 2571 on its inner surface meshes with gear one 255, causing several downward pressure rods 252 to rotate clockwise at the same time; the toothed ring plate 258 meshes with gear two 256, causing several upward pressure rods 254 to rotate counterclockwise around the support frame 253. By engaging the toothed groove 2571 on the rotating plate 257 with gear 255 and gear ring plate 258 with gear 256, it can be ensured that several lower pressure rods 252 and several upper pressure rods 254 in the same group rotate and unfold synchronously, avoiding electrode clamping deviation caused by uneven force on a single lower pressure rod 252 or upper pressure rod 254. When the rotating plate 257 rotates, all lower pressure rods 252 and upper pressure rods 254 in the same group unfold at the same angle, and the clamping force is evenly distributed on the circumference of the electrode rod.

[0050] The rotation angle of the rotating plate 257 determines the opening range of the lower pressure rod 252 and the upper pressure rod 254, thereby controlling the clamping force. For electrodes of different diameters, the electric slide 2511 can be adjusted to avoid excessive tightness leading to electrode deformation or excessive looseness leading to wobbling.

[0051] The pressing rod 252 and the pressing rod 254 simultaneously approach the electrode rod from multiple directions with their pressing members 26. When the balls 2611 on the outer surface of the pressing block 261 contact the surface of the electrode rod, the pressing rod 252 or the pressing rod 254 continues to rotate and unfold. The spring 263 provides adaptive clamping force, causing elastic deformation. The pressing block 261 and the connecting post 262 slide inside the pressing rod 252 or the pressing rod 254, reducing the gap between the pressing block 261 and the pressing rod 252 or the pressing rod 254. This continues until the balls 2611 on the outer surface of the pressing block 261 are tightly fitted to the outer surface of the electrode rod under the action of the spring 263, ensuring that the axis of the electrode rod is coaxial with the rotation center of the tool. The two sets of pressing members 26 achieve centering and limiting of the electrode rod. The ball bearing 2611 is rotatably connected to the pressure block 261 via a horizontal shaft located inside it. The ball bearing 2611 can only rotate around the horizontal shaft. After the pressure block 26 clamps the electrode rod, the electrode rod can still move up and down in the vertical direction relative to the tool holder 1 through the ball bearing 2611, thus moving closer to the first grinding zone 13. Since the horizontal shaft is horizontally set and the outer surface of the ball bearing 2611 is made of rubber, the friction is large, which reduces the horizontal rotational deviation of the electrode rod during milling and increases the stability of the electrode rod.

[0052] Several downward pressure rods 252 and several upward pressure rods 254 rotate in opposite directions in the circumferential direction and are spaced apart in the vertical direction. The downward pressure rods 252 and upward pressure rods 254 employ the same structural design, and their cooperation allows for the simultaneous application of symmetrical clamping forces at different axial positions of the electrode rod, avoiding axial displacement caused by clamping in a single direction. During the grinding of the conical electrode, the bottom and middle sections can be structurally fixed from opposite directions by two sets of abutment members 26, preventing shaking caused by electrode center of gravity shift or grinding vibration.

[0053] The lower pressure rod 252 and the upper pressure rod 254 are symmetrically distributed axially around the gear 255. The lower pressure rod 252 and the upper pressure rod 254 can cover different positions of the electrode rod, and dual-plane positioning can be achieved through the coordinated clamping of the two sets of pressing parts 26. The centering structure 25 can ensure that the axis of the electrode rod coincides with the axis of the tool holder 1, and can also ensure that the electrode rod is inserted into the first grinding zone 13 in a vertical state. When milling the electrode head with a conical end (the bottom plane of the conical electrode head is prone to tilting due to uneven force at the transition between the conical surface and the bottom plane), the eccentricity error during grinding is greatly reduced. When the electrode rod is inserted vertically, it is perpendicular to the upper surface of the top cutter 11. The upper side blade 121 and the upper cutting blade 111 inside the tool holder 1 grind the electrode rod in all directions with uniform force. The upper cutting blade 111 can grind the end face of the electrode rod into a standard plane, avoiding the problems of uneven end face and dimensional deviation caused by tilting. This makes the electrode discharge more stable during use and improves the welding quality.

[0054] The process of grinding the electrodes:

[0055] The transmission box 2 and its external components are moved vertically, allowing the electrode head to enter the first grinding zone 13. The bevel gear 21 inside the transmission box 2 is rotated via CNC starting. The bevel gear 21 meshes with the outer surface of the conical gear 24, driving the connecting seat 22 to rotate via the conical gear 24. Since the tool holder 1 and its internal components form a single unit with the connecting seat 22 via the connecting assembly 23, the connecting seat 22 and the tool holder 1 are mutually locked, and the tool holder 1 rotates along with it. As the tool holder 1 rotates, the centering structure 25 remains stationary, resulting in relative movement between the tool holder 1 and the electrode. The top cutter 11 and the side cutter 12 mill the electrode head. During the rotation of the tool holder 1, the upper cutting edge 111 and the upper side cutting edge 121 of the first grinding zone 13 mill the top of the electrode head through the rotation of the tool holder 1, completing the milling of conical surfaces and other shapes. The material and shape of the lower cutting edge 112 and the lower side cutting edge 122 in the second grinding zone 14 can be designed according to actual needs, which can meet the requirements of milling another electrode shape or precision milling of an electrode of the same shape.

[0056] The milling chips generated are thrown into the chip collection groove 27 on the outer surface of the transmission box 2 under the centrifugal force of the rotating tool. The chip collection groove 27 has an arc design and a certain depth. When the external negative pressure dust collection device generates suction through the dust collection pipe 271, the chips thrown into the chip collection groove 27 are immediately discharged outward through the dust collection pipe 271, preventing chips from splashing to the outside, reducing chip accumulation, and ensuring machining accuracy and tool life.

[0057] The process of disassembling tool holder 1:

[0058] When disassembling the tool holder 1, the centering structure 25 is in a retracted state, presenting an annular opening, which facilitates the assembly and disassembly of the tool holder 1. Moving the connecting plate 234 away from the tool holder 1 causes the elastic element 236 to compress again. The connecting plate 234, via the guide rod 233, drives the arc-shaped inclined plate 232 downwards within the placement groove 222. After the outer surface of the pressure plate 235 completely disengages from the limiting block 231, the tool holder 1 can be removed from the transmission box 2 by rotating it in the opposite direction, following the path of the annular groove 221.

[0059] In summary, electrode grinding has the following advantages over conventional equipment:

[0060] Advantage 1: The top cutter 11 and side cutter 12, symmetrically distributed along the upper and lower axes, form independently controllable first grinding zone 13 and second grinding zone 14. The upper cutting edge 111, lower cutting edge 112, upper side cutter 121, and lower side cutter 122 can be designed with differentiated materials and geometries, and can be designed according to different shapes and different machining degrees. For different machining degrees, the first grinding zone 13 can be equipped with carbide cutting edges for roughing, while the second grinding zone 14 can use diamond-coated cutting edges for precision polishing, which can improve the grinding effect of the electrode head; for different machining shapes, the tool holder 1 greatly improves its versatility and applicability.

[0061] Secondly, this regrinding tool is used in handheld electrode head regrinding equipment. Operators can flexibly adjust the angle and position of the equipment according to the installation position of the electrode head and regrinding needs, performing omnidirectional regrinding operations. Simultaneously, the centering structure 25 is in a retracted state when not in use, presenting an annular opening. The internal cavity and opening can accommodate electrodes at different angles within the centering structure 25. The annular opening design of the centering structure 25 allows for vertical insertion of the electrode rod and also accommodates horizontal movement in confined spaces, making it suitable for a wide range of scenarios. Whether it's an exposed electrode head or an electrode head inside a small, space-constrained device, this equipment can easily access and regrind it, providing greater operational flexibility for electrode head maintenance. When working in confined spaces or at complex angles, operators do not need to frequently adjust their posture or re-clamp the electrode; they only need to flip the handheld device to select the appropriate first grinding zone 13 or second grinding zone 14, quickly switching between the two sides of the device to regrind electrode heads at different positions, reducing tool change time and improving overall production line efficiency.

[0062] Thirdly, when installing the tool holder 1 into the transmission box 2, pushing and rotating the tool holder 1 allows for a quick and secure connection between the tool holder 1 and the connecting seat 22 through the engagement of the annular groove 221 and the limiting block 231, as well as the pre-tightening force of the elastic element 236. The limiting action of the annular groove 221 and the pressing action of the pressure plate 235 ensure precise positioning of the tool holder 1 in both the vertical and horizontal directions. Without the need for external tools, operators can easily install and disassemble the tool holder 1, greatly improving work efficiency. Conventional equipment typically requires bolts, nuts, and other tools for fixing and disassembling, a cumbersome and time-consuming process.

[0063] Fourthly, the lower pressure rod 252 and the upper pressure rod 254 rotate in opposite directions in the circumferential direction, which can simultaneously apply symmetrical clamping force to different axial positions of the electrode rod, effectively preventing axial and rotational offset of the electrode rod during clamping, and ensuring that the centerline of the electrode and the tool holder 1 coincides. Multiple lower pressure rods 252 and upper pressure rods 254 are spread out at the same angle, so that the clamping force is evenly distributed on the circumferential surface of the electrode, avoiding electrode deformation caused by excessive local pressure. In conjunction with the ball bearings 2611 in the pressure member 26 that rotate through the horizontal axis, the ball bearings 2611 with the outer surface of rubber can not only restrict the circumferential rotation of the electrode, but also allow it to adaptively adjust the feed depth in the axial direction, and compensate for the small offset caused by tool wear and vibration in real time during the grinding process, further enhancing the dynamic stability of perpendicularity.

[0064] Fifthly, in conventional manual handheld electrode repair equipment, it is difficult for humans to accurately ensure the perpendicularity of the electrode to the equipment. For electrodes with a flat top, they are usually used in scenarios requiring stable discharge and uniform contact. If the top of the electrode rod is not perpendicular to the top cutter 11, the top plane of the motor after grinding will have a "tilt angle," resulting in a smaller contact area between the electrode and the workpiece during operation, or even only single-point contact, leading to uneven discharge. This not only affects processing efficiency but can also cause damage to the workpiece or electrode due to excessive local current. In contrast, in the centering structure 25 of this application, the lower pressure rod 252 and the upper pressure rod 254 are distributed at intervals in the vertical direction. By aligning the electrode rod with the axis of the tool holder 1 at two planes, the perpendicularity of the electrode rod relative to the tool holder 1 is further ensured, forming a dual-plane positioning. Compared with traditional single-point clamping, this can effectively counteract the tilting tendency of the electrode caused by its own weight and clamping stress. After vertical grinding, the electrode head maintains the same contact area, ensuring the quality of spot welding.

[0065] Advantage 6: The chips generated during milling and grinding are thrown into the chip collection groove 27 on the outer surface of the transmission box 2 by the centrifugal force of the rotating top cutter 11 and side cutter 12 in the tool holder 1. They are then promptly discharged through the suction pipe 271 by the external negative pressure dust collection device. This effectively prevents chips from accumulating in the machining area, affecting machining accuracy, tool life, and the centering structure 25. Compared to conventional equipment, the chip removal method of conventional equipment is usually simpler, and chips easily accumulate in the machining area, not only affecting the machining effect but also leading to tool damage or reduced machining efficiency.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool for an electrode grinder, characterized in that, include: A tool holder (1) is provided with a top cutter (11) fixedly installed inside the tool holder (1) and a side cutter (12) fixedly installed inside the tool holder (1) by bolts. There are several top cutters (11) and side cutters (12). The upper and lower surfaces of the top cutter (11) are respectively provided with an upper cutting edge (111) and a lower cutting edge (112). The outer surfaces of the side cutters (12) are respectively provided with an upper side edge (121) and a lower side edge (122). Several upper cutting edges (111) and upper side edges (121) form a first grinding area (13) capable of milling the electrode head in a rotating manner. Several lower cutting edges (112) and lower side edges (122) form a second grinding area (14) capable of milling the electrode head in a rotating manner. The transmission box (2) is rotatably connected to the inside of the transmission box (2). A connecting seat (22) is fixedly connected to the inner circumference of the bevel gear (21). The connecting seat (22) is provided with a connecting component (23) for placing the tool holder (1) through an annular groove (221) opened on its inner circumference. The transmission box (2) is rotatably connected to a bevel gear (24) that meshes with the outer surface of the bevel gear (21). The outer surface of the transmission box (2) is provided with a centering structure (25) for fixing the electrode rod. The centering structure (25) includes two semi-ring seats (251) symmetrically distributed around the transmission box (2). A downward pressure rod (252) is rotatably connected to the side of the semi-ring seat (251) away from the transmission box (2). The transmission box (2) is rotatably connected to the side of the semi-ring seat (251) away from the transmission box (2). The support frame (253) is rotatably connected to an upper pressure rod (254). Both the lower pressure rod (252) and the upper pressure rod (254) have abutment members (26) on the side near the center line of the semi-ring seat (251). A gear one (255) is fixedly connected to the upper surface of the lower pressure rod (252), and a gear two (256) is fixedly connected to the lower surface of the upper pressure rod (254). The semi-ring seat (251) is rotatably connected to a rotating plate (257) via an electric sliding groove (2511) on its outer circumference. The rotating plate (257)... The inner circumference of the rotating plate (257) is provided with a toothed groove (2571) that meshes with the outer surface of gear one (255). The inner circumference of the rotating plate (257) is fixedly connected with a toothed ring plate (258) that meshes with the outer surface of gear two (256). The rotating plate (257) adopts an open design. The lower pressure rod (252) and the upper pressure rod (254) are staggered in the circumferential direction with the axis of the semi-ring seat (251) as the center. The lower pressure rod (252) and the upper pressure rod (254) are staggered in the vertical direction with the axis of gear one (255) as the center. The lower pressure rod (252) and the upper pressure rod (254) are distributed vertically around the center, and rotate in opposite directions. The pressing member (26) includes a pressing block (261). A connecting column (262) that passes through the upper pressure rod (254) is fixedly connected to the outer surface of the pressing block (261). A spring (263) is sleeved on the outer surface of the connecting column (262). A ball bearing (2611) is rotatably connected to the pressing block (261) through a horizontal shaft set inside it. The outer surface of the ball bearing (2611) is made of rubber.

2. The electrode grinder tool according to claim 1, characterized in that: The connecting assembly (23) includes a limiting block (231) fixedly connected to the outer circumferential surface of the tool holder (1). The connecting seat (22) has a placement groove (222) that communicates with the inside of the annular groove (221). An arc inclined plate (232) is slidably connected inside the placement groove (222). A guide rod (233) is provided on the outer surface of the arc inclined plate (232). One end of the guide rod (233) away from the arc inclined plate (232) passes through the connecting seat (22) and is fixedly connected to a connecting plate (234). A pressure plate (235) that fits against the outer surface of the limiting block (231) is fixedly connected to the outer surface of the arc inclined plate (232). An elastic element (236) is provided on the outer surface of the guide rod (233).

3. The electrode grinder tool according to claim 1, characterized in that: The outer surface of the transmission box (2) is provided with a chip collection groove (27), and a dust collection pipe (271) that communicates with the inside of the chip collection groove (27) is fixedly connected to one side of the transmission box (2).

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