Tool and method for crushing alloy teeth of drill bit

Abstract

The invention provides a tool for crushing alloy teeth of a drill bit. The tool comprises a feeding device, a fixing block, a clamping device, a cutting fluid guide pipe and a graphite electrode. The feeding device is installed on a machine tool, the clamping device is arranged on the feeding device through a fixing block, the graphite electrode is clamped at the lower end of the clamping device and can move through the feeding device, the graphite electrode is matched with alloy teeth in size, and an outlet of the cutting fluid guide pipe is communicated with a clamping opening of the clamping device. A cooling liquid hole penetrating through a body of the graphite electrode is formed in the middle of the graphite electrode along the axis, and the cooling liquid hole can be communicated with a cutting liquid guide pipe through a clamping device. The invention further provides a method for crushing the alloy teeth of the drill bit, high-temperature electric arcs are generated by adopting an electric spark machining (EDM) technology and utilizing the discharge phenomenon between a graphite electrode and the alloy teeth, so that alloy tooth materials are melted and removed, rapid crushing of the alloy teeth is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of drill bits, and in particular to a tool for crushing alloy teeth of a drill bit and a method thereof. Background Art

[0002] The roller drill bit is a tool for breaking rocks in the earth's crust. The roller drill bits used in oil drilling and other mining drilling can be divided into single-cone drill bits, two-cone drill bits, three-cone drill bits, etc., all of which are composed of a tooth palm and a roller with cutting teeth. The roller drill bits are divided into two types according to the material and structure of the roller cutting teeth. The first type is a steel-tooth roller drill bit, and the cutting teeth on its roller are all milled from the roller body material. The second type is an insert-tooth roller drill bit, and the cutting teeth on its roller are all carbide teeth embedded on the outer cone surface of the roller. The insert-tooth roller drill bit manufacturer will adopt the interference fit cold pressing method after drilling the roller surface to press the alloy teeth into the hole; after the alloy teeth of the insert-tooth roller drill bit are worn, because the alloy teeth and the roller are fixed together by interference fit cold pressing, it is very difficult to remove the damaged alloy teeth, so the usual practice is to directly replace the entire drill bit, which undoubtedly increases the cost.

[0003] The existing technology for processing worn or damaged alloy teeth of toothed roller drill bits is usually simple and rough, such as directly using strong knocking to remove the old alloy teeth in order to replace them with new ones. However, this method may cause the drill bit base to deform or be damaged. Especially for precision-machined drill bits, this physical impact may affect the accuracy and durability of the drill bit; and the broken alloy teeth splatter everywhere and are difficult to recover. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a tooling and method for crushing drill bit alloy teeth, by using graphite electrodes to perform electrospark machining on the alloy teeth, and by taking advantage of the fact that electrospark machining is not limited by the hardness and strength of the workpiece material, the alloy teeth can be quickly crushed and work efficiency can be improved.

[0005] The technical solution adopted by the present invention to solve its technical problem is: Provided is a drill bit alloy tooth crushing tool and method thereof, comprising: a feeding device, a fixing block, a clamping device, a cutting fluid conduit and a graphite electrode; The feeding device is installed on the machine tool, the clamping device is arranged on the feeding device through a fixed block, the graphite electrode is clamped at the lower end of the clamping device and can be moved through the feeding device, and the size of the graphite electrode matches the alloy tooth, the outlet of the cutting fluid conduit is connected with the clamping port of the clamping device, and the middle part of the graphite electrode is provided with a coolant hole penetrating its body along the axis, and the coolant hole can be connected with the cutting fluid conduit through the clamping device.

[0006] It should be noted that the feeding device is installed on the machine tool and is used to control the movement of the entire tooling. It ensures that during the EDM process, the graphite electrode can smoothly approach and move away from the alloy tooth to be crushed according to a predetermined trajectory to achieve precise machining movements; the fixing block stably installs the clamping device on the feeding device; the clamping device is used to fix the graphite electrode and ensure its accurate position; the cutting fluid conduit provides cooling and lubrication to reduce heat accumulation and wear during the machining process; the graphite electrode, as a crushing tool, generates an arc in EDM (electrical discharge machining), thereby melting and removing the alloy tooth material; the outlet of the cutting fluid conduit is connected to the clamping port of the clamping device, ensuring that the cutting fluid can flow smoothly through the clamping device and be directly sprayed into the machining area through the coolant hole of the graphite electrode, thereby improving the cooling efficiency and machining accuracy.

[0007] Preferably, the graphite electrode is a square column structure as a whole, and the length of its diagonal is 0.85-0.92 times the diameter of the alloy tooth.

[0008] It should be noted that most of the existing electrodes are cylindrical electrodes and straight electrodes. The discharge area of ​​the cylindrical electrode is greatly increased, resulting in slower efficiency, longer crushing time, waste of electricity, and more alloy tooth fragments that are not conducive to environmental protection and recycling. Although the discharge area of ​​the straight electrode is smaller, its structure determines that it can only be cooled from the outside. When the graphite electrode enters the alloy tooth, the coolant cannot enter the inside, resulting in insufficient cooling, and the alloy tooth may still not be removed after the straight electrode is crushed. The electrode shape used in this design is square and a coolant hole is opened in the middle. The graphite electrode is designed as a square column structure to ensure that there is enough contact area to generate a stable arc during the electrospark machining process, and it is easy to position and guide.

[0009] Preferably, the clamping device includes a clamping cylinder, a locking device and a connecting head. A clamping through hole is opened at the center of the clamping cylinder along the axial line. The locking device is arranged on the cylinder wall at the lower end of the clamping cylinder. The upper end of the clamping through hole is connected to the cutting fluid conduit through the connecting head, and the lower end fixes the graphite electrode through the locking device.

[0010] It should be noted that a clamping through hole is opened on the axis line of the clamping cylinder to accommodate the graphite electrode. The size of the clamping through hole needs to match the size of the graphite electrode to ensure that the electrode can be firmly placed therein; the locking device can adopt threaded fasteners, retaining springs or other forms of fixing mechanisms to ensure that the graphite electrode will not loosen or fall off during the processing; the connector not only plays a connecting role, but also has a sealing function to prevent cutting fluid leakage, and the connector can ensure that the cutting fluid can smoothly flow into the clamping through hole, and finally spray into the processing area through the coolant hole of the graphite electrode, providing the necessary cooling and lubrication for the EDM process.

[0011] Preferably, the upper end of the clamping through hole is a funnel-shaped conical through hole, and the lower end is a square through hole arranged corresponding to the shape of the graphite electrode. The graphite electrode is arranged in the square through hole, and the upper end of the coolant hole of the graphite electrode can abut against the outer wall of the conical through hole.

[0012] It should be noted that the upper end of the clamping through hole is designed as a funnel-shaped conical through hole, which helps to guide the cutting fluid to flow in smoothly and ensure that the cutting fluid can accurately flow into the coolant hole of the graphite electrode. The square through hole at the lower end matches the square column structure of the graphite electrode, which can better fix the electrode and ensure the stable position of the electrode during processing.

[0013] Preferably, the locking device is one or more adjustable clamping screws, threaded holes are correspondingly arranged on the wall of the clamping cylinder, and the graphite electrode is fixed by the cooperation between the clamping screws and the threaded holes.

[0014] It should be noted that the clamping screw passes through the threaded hole on the wall of the clamping cylinder, contacts the graphite electrode and applies pressure to fix the graphite electrode; the number of clamping screws can be determined according to actual conditions. For example, if the graphite electrode is larger or requires higher stability, the number of clamping screws can be increased; conversely, if the graphite electrode is smaller or the processing requirements are not particularly strict, the number of clamping screws can be reduced; in addition, the position and number of threaded holes also need to be designed according to the size and shape of the graphite electrode to ensure the best clamping effect.

[0015] Preferably, a flow valve is provided on the cutting fluid conduit. It should be noted that the flow valve can accurately control the flow of cutting fluid to ensure that an appropriate amount of coolant is provided during the EDM process, which can not only effectively take away heat but also avoid waste caused by excessive use of cutting fluid; the specific type of flow valve can be selected according to actual needs, common ones include manual regulating valves, electric regulating valves, etc.; manual regulating valves are suitable for situations where frequent flow adjustment is not required, while electric regulating valves are more suitable for processing environments with a high degree of automation, and the flow can be automatically adjusted through the control system to meet different processing requirements.

[0016] A drill bit alloy tooth crushing method, implemented according to any of the above-mentioned drill bit alloy tooth crushing tooling, characterized in that the method comprises the following steps: S1. Install the drill bit alloy tooth crushing tool on the machine tool, and clamp the drill bit to be crushed on the machine tool to ensure that all parts are in normal working condition; S2. Select a graphite electrode with a diagonal length of 0.85-0.92 times the diameter of the alloy tooth, clamp it on the clamping device, lock it, and adjust the position of the graphite electrode so that it is aligned with the alloy tooth to be crushed; S3, start the machine tool, control the graphite electrode to approach the alloy tooth through the feeding device, and start the electrospark machining. At the same time, the cutting fluid is directly sprayed into the machining area through the coolant hole to ensure that the machining area is fully cooled and lubricated. Through the electrospark machining, an arc is generated between the graphite electrode and the alloy tooth, melting and removing the alloy tooth material, and retaining a certain thickness of the alloy tooth wall during the crushing process; S4. When the alloy tooth is crushed, turn off the machine tool and cutting fluid supply, and use tools to remove the remaining alloy tooth and tooth wall.

[0017] It should be noted that when selecting graphite electrodes, ensure that their diagonal length is 0.85-0.92 times the diameter of the alloy teeth. This ensures that the alloy tooth wall has a certain thickness during the crushing process, which is convenient for the subsequent removal of the remaining alloy tooth parts. It also reduces the generation of alloy tooth fragments, which is beneficial to environmental protection and recycling.

[0018] Preferably, in step S3, the speed of the feeding device and the flow rate of the cutting fluid are adjusted to control the temperature during the electrospark machining process to prevent overheating from damaging the graphite electrode or the alloy tooth.

[0019] It should be noted that the speed of the feed device directly affects the contact time between the graphite electrode and the alloy tooth and the processing efficiency; if the feed speed is too fast, the contact time between the graphite electrode and the alloy tooth will be shortened, which may not be enough to complete sufficient EDM, resulting in incomplete crushing of the alloy tooth; on the contrary, if the feed speed is too slow, it may cause local overheating, affecting the processing quality and the service life of the graphite electrode; and the appropriate cutting fluid flow rate can effectively take away the heat generated during the processing and prevent the graphite electrode and alloy tooth from overheating; therefore, it is necessary to adjust the feed speed and cutting fluid flow rate according to the actual situation to ensure the processing efficiency and quality.

[0020] Preferably, in step S3, the thickness of the retained alloy tooth wall is controlled between 0.5 mm and 1.0 mm to ensure that the crushed alloy teeth can be smoothly separated from the drill bit body without damaging the drill bit base.

[0021] It should be noted that retaining a certain thickness of alloy tooth wall helps to separate the alloy teeth from the drill bit body more easily after the crushing is completed, rather than being difficult to remove due to excessive crushing. It can also avoid damage to the drill bit base during the crushing process, thereby ensuring the integrity and service life of the drill bit base.

[0022] Preferably, in step S4, the residual alloy teeth and the residual tooth walls can be removed by using a special clamping tool or manually knocking.

[0023] It should be noted that by using a special clamping tool or manually tapping to remove the residual alloy tooth wall, the drill bit base can be ensured not to be damaged, while ensuring that the residual alloy tooth wall is completely removed to prepare for the installation of new alloy teeth, which helps to improve the overall performance and service life of the drill bit.

[0024] Beneficial effects of the present invention: The present invention provides a tool and method for crushing alloy teeth of a drill bit. By adopting a graphite electrode for electric spark machining, the hardness and strength of the alloy teeth can be not affected, the alloy teeth can be quickly crushed, and the work efficiency is significantly improved. The design of the graphite electrode (square column structure and diagonal length) can effectively reduce the power consumption in the crushing process, and at the same time reduce the generation of alloy tooth fragments, which is beneficial to environmental protection and material recycling. The effective supply of cutting fluid is directly sprayed to the processing area through the cooling liquid hole, which can effectively take away the heat, reduce the thermal deformation of the graphite electrode and the workpiece, and thus improve the processing accuracy and surface quality. The design of the clamping device ensures the stability and accuracy of the graphite electrode in the processing process, and the locking device (such as the clamping screw) can ensure that the graphite electrode will not loosen in the processing process, thereby improving the reliability of the entire system. The flow valve on the cutting fluid conduit can adjust the cutting fluid flow according to the actual processing requirements, which can not only meet the cooling requirements, but also avoid excessive use of cutting fluid and save resources. By controlling the thickness of the alloy tooth wall during the crushing process (0.5mm to 1.0mm), it can be ensured that the drill base is not damaged and the service life of the drill bit is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of a tool for crushing drill bit alloy teeth according to Example 1 of the present invention.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the clamping device of Example 1 of the present invention.

[0027] Figure 3 It is a cross-sectional view of the clamping device of Example 1 of the present invention.

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the graphite electrode of Example 1 of the present invention.

[0029] Figure 5 This is a three-dimensional schematic diagram of a drill bit alloy tooth crushing tool according to Example 2 of the present invention.

[0030] Figure 6 It is a cross-sectional view of the clamping device of embodiment 2 of the present invention.

[0031] Figure 7 This is a schematic diagram of the clamping device and graphite electrode installation structure of Example 2 of the present invention.

[0032] In the figure: 1. feeding device; 2. fixing block; 3. clamping device; 31. clamping cylinder; 32. locking device; 33. connecting head; 34. clamping through hole; 341. conical through hole; 342. square through hole; 4. cutting fluid conduit; 5. graphite electrode; 51. coolant hole; 6. flow valve.

[0033] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1 like Figure 1-Figure 4 As shown, a drill bit alloy tooth crushing tool comprises: a feeding device 1, a fixing block 2, a clamping device 3, a cutting fluid conduit 4 and a graphite electrode 5; The feeding device 1 is installed on the machine tool, the clamping device 3 is arranged on the feeding device 1 through the fixing block 2, the graphite electrode 5 is clamped at the lower end of the clamping device 3 and can be moved through the feeding device 1, and the size of the graphite electrode 5 matches the alloy tooth, the outlet of the cutting fluid conduit 4 is connected with the clamping port of the clamping device 3, and the middle part of the graphite electrode 5 is provided with a coolant hole 51 penetrating its body along the axis, and the coolant hole 51 can be connected with the cutting fluid conduit 4 through the clamping device 3.

[0036] The graphite electrode 5 is a square column structure as a whole.

[0037] The clamping device 3 includes a clamping cylinder 31, a locking device 32 and a connecting head 33. A clamping through hole 34 is opened at the center of the clamping cylinder 31 along the axial line. The locking device 32 is arranged on the cylinder wall at the lower end of the clamping cylinder 31. The upper end of the clamping through hole 34 is connected to the cutting fluid conduit 4 through the connecting head 33, and the lower end fixes the graphite electrode 5 through the locking device 32.

[0038] The locking device 32 is a plurality of adjustable clamping screws, and threaded holes are correspondingly arranged on the wall of the clamping cylinder 31 , and the graphite electrode 5 is fixed by the cooperation of the clamping screws and the threaded holes.

[0039] Working principle and use method of a drill bit alloy tooth crushing tool in this embodiment: The present embodiment provides a tooling for crushing alloy teeth of a drill bit, wherein a feeding device 1 is installed on a machine tool to control the precise movement of a graphite electrode 5 relative to the alloy teeth, a locking device 32 is a plurality of adjustable clamping screws, and the graphite electrode 5 can be firmly fixed by cooperating between the clamping screws and the threaded holes on the wall of the clamping cylinder 31, and the cutting fluid is transported to the clamping device 3 through a cutting fluid conduit 4, and then directly sprayed into the processing area through a coolant hole 51 arranged along the axis in the middle of the graphite electrode 5, to ensure that the processing area is adequately cooled and lubricated.

[0040] When in use, first install the feeding device 1 on the machine tool, then fix the clamping device 3 on the feeding device 1 through the fixing block 2, and at the same time connect the outlet end of the cutting fluid conduit 4 with the clamping cylinder 31 through the connector 33, select a graphite electrode 5 that matches the size of the alloy tooth and fix it in the clamping cylinder 31, and calibrate the position of the graphite electrode 5 and the alloy tooth, start the machine tool, and the feeding device 1 controls the movement of the graphite electrode 5, so that a discharge channel is formed between the graphite electrode 5 and the alloy tooth, generating a high-temperature arc, thereby melting and removing the alloy tooth material. At this time, the cutting fluid flows out from the lower end of the graphite electrode 5 through the coolant hole 51 to cool the alloy tooth and the graphite electrode 5. When the alloy tooth is crushed, turn off the machine tool and the cutting fluid supply, remove the residual alloy tooth debris, and complete the crushing of the alloy tooth.

[0041] Example 2 like Figure 5-Figure 7 As shown, a drill bit alloy tooth crushing tool and method of this embodiment include: a feeding device 1, a fixing block 2, a clamping device 3, a cutting fluid conduit 4 and a graphite electrode 5; The feeding device 1 is installed on the machine tool, the clamping device 3 is arranged on the feeding device 1 through the fixing block 2, the graphite electrode 5 is clamped at the lower end of the clamping device 3 and can be moved through the feeding device 1, and the size of the graphite electrode 5 matches the alloy tooth, the outlet of the cutting fluid conduit 4 is connected with the clamping port of the clamping device 3, and the middle part of the graphite electrode 5 is provided with a coolant hole 51 penetrating its body along the axis, and the coolant hole 51 can be connected with the cutting fluid conduit 4 through the clamping device 3.

[0042] The graphite electrode 5 is a square column structure as a whole.

[0043] The clamping device 3 includes a clamping cylinder 31, a locking device 32 and a connecting head 33. A clamping through hole 34 is opened at the center of the clamping cylinder 31 along the axial line. The locking device 32 is arranged on the cylinder wall at the lower end of the clamping cylinder 31. The upper end of the clamping through hole 34 is connected to the cutting fluid conduit 4 through the connecting head 33, and the lower end fixes the graphite electrode 5 through the locking device 32.

[0044] The upper end of the clamping through hole 34 is a funnel-shaped conical through hole 341, and the lower end is a square through hole 342 arranged corresponding to the shape of the graphite electrode 5. The graphite electrode 5 is arranged in the square through hole 342, and the upper end of the coolant hole 51 of the graphite electrode 5 can abut against the outer wall of the conical through hole 341.

[0045] The locking device 32 is a plurality of adjustable clamping screws, and threaded holes are correspondingly arranged on the wall of the clamping cylinder 31 , and the graphite electrode 5 is fixed by the cooperation of the clamping screws and the threaded holes.

[0046] The cutting fluid conduit 4 is provided with a flow valve 6 Compared with Example 1: The present embodiment provides a drill bit alloy tooth crushing tool, the upper end of the clamping through hole 34 of the clamping device 3 is designed as a funnel-shaped conical through hole 341, which helps to guide the cutting fluid to flow smoothly into the coolant hole 51 of the graphite electrode 5, ensuring that the coolant can be accurately sprayed into the processing area. Such a design can improve the cooling efficiency and ensure that the processing area is fully cooled and lubricated. The flow valve 6 set on the cutting fluid conduit 4 allows the operator to adjust the flow of the cutting fluid according to the actual processing requirements. The flow valve 6 can be manually adjusted or electrically adjusted, depending on the degree of automation of the processing environment. By accurately controlling the flow of the cutting fluid, the heat generated during the processing can be effectively taken away, preventing the graphite electrode 5 and the alloy tooth from overheating, and avoiding waste caused by excessive use of the cutting fluid.

[0047] Example 3 A drill bit alloy tooth crushing method is implemented according to a drill bit alloy tooth crushing tool described in any one of Embodiment 1 or Embodiment 2, and the method comprises the following steps: S1. Install the drill bit alloy tooth crushing tool on the machine tool, and clamp the drill bit to be crushed on the machine tool to ensure that all parts are in normal working condition; S2. Select a graphite electrode 5 whose diagonal length is 0.85-0.92 times the diameter of the alloy tooth, clamp it on the clamping device 3, lock it, and adjust the position of the graphite electrode 5 so that it is aligned with the alloy tooth to be crushed; S3, start the machine tool, control the graphite electrode 5 to approach the alloy tooth through the feeding device 1, and start the electrospark machining, and at the same time, the cutting fluid is directly sprayed into the machining area through the coolant hole 51 to ensure that the machining area is fully cooled and lubricated. Through the electrospark machining, an arc is generated between the graphite electrode 5 and the alloy tooth, the alloy tooth material is melted and removed, and a certain thickness of the alloy tooth wall is retained during the crushing process; S4. When the alloy tooth is crushed, turn off the machine tool and cutting fluid supply, and use tools to remove the remaining alloy tooth and tooth wall.

[0048] In step S3, the speed of the feeding device 1 and the flow rate of the cutting fluid are adjusted to control the temperature during the electrospark machining process to prevent overheating from damaging the graphite electrode 5 or the alloy teeth.

[0049] In the step S3, the thickness of the retained alloy tooth wall is controlled at 0.5 mm to ensure that the broken alloy teeth can be smoothly separated from the drill body without damaging the drill base.

[0050] In the step S4, the residual alloy teeth and the residual tooth walls can be removed by using a special clamping tool or manually knocking.

[0051] Working principle of a drill bit alloy tooth crushing method of this embodiment: The present embodiment provides a method for crushing alloy teeth of a drill bit. By adopting the electric spark machining (EDM) technology, the discharge phenomenon between the graphite electrode 5 and the alloy tooth is utilized to generate a high-temperature arc, thereby melting and removing the alloy tooth material. The advantage of this method is that it is not affected by the hardness and strength of the alloy tooth, and can achieve rapid crushing of the alloy tooth, which significantly improves the work efficiency. In order to ensure the temperature control during the processing, the speed of the feed device 1 and the flow rate of the cutting fluid can be adjusted to prevent overheating from damaging the graphite electrode 5 or the alloy tooth; by retaining a certain thickness of the alloy tooth wall (between 0.5 mm and 1.0 mm), the drill bit base can be ensured not to be damaged, the service life of the drill bit can be extended, and the production efficiency can be significantly improved. At the same time, the damage to the drill bit base is reduced, and the replacement cost is reduced.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

[0053] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A drill bit alloy tooth crushing tool, comprising: A feeding device (1), a fixing block (2), a clamping device (3), a cutting fluid conduit (4) and a graphite electrode (5); characterized in that: The feeding device (1) is installed on a machine tool, the clamping device (3) is arranged on the feeding device (1) through a fixing block (2), the graphite electrode (5) is clamped at the lower end of the clamping device (3) and can be moved through the feeding device (1), and the size of the graphite electrode (5) matches the alloy tooth, the outlet of the cutting fluid conduit (4) is connected to the clamping port of the clamping device (3), and the middle part of the graphite electrode (5) is provided with a cooling liquid hole (51) penetrating the body thereof along the axis, and the cooling liquid hole (51) can be connected to the cutting fluid conduit (4) through the clamping device (3).

2. A drill bit alloy tooth crushing tool as claimed in claim 1, characterized in that: The graphite electrode (5) is a square column structure as a whole.

3. A drill bit alloy tooth crushing tool as claimed in claim 1, characterized in that: The clamping device (3) comprises a clamping cylinder (31), a locking device (32) and a connecting head (33); a clamping through hole (34) is provided at the center of the clamping cylinder (31) along the axis; the locking device (32) is arranged on the cylinder wall at the lower end of the clamping cylinder (31); the upper end of the clamping through hole (34) is connected to the cutting fluid conduit (4) through the connecting head (33); and the lower end fixes the graphite electrode (5) through the locking device (32).

4. A drill bit alloy tooth crushing tool as claimed in claim 3, characterized in that: The upper end of the clamping through hole (34) is a funnel-shaped conical through hole (341), and the lower end is a square through hole (342) arranged in a shape corresponding to the graphite electrode (5); the graphite electrode (5) is arranged in the square through hole (342), and the upper end of the coolant hole (51) of the graphite electrode (5) can abut against the outer wall of the conical through hole (341).

5. A drill bit alloy tooth crushing tool as claimed in claim 3, characterized in that: The locking device (32) is one or more adjustable clamping screws, and threaded holes are correspondingly arranged on the wall of the clamping cylinder (31), and the graphite electrode (5) is fixed by the cooperation of the clamping screws and the threaded holes.

6. A drill bit alloy tooth crushing tool as claimed in claim 1, characterized in that: The cutting fluid conduit (4) is provided with a flow valve (6).

7. A drill bit alloy tooth crushing method, implemented according to a drill bit alloy tooth crushing tool according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1. Install the drill bit alloy tooth crushing tool on the machine tool, and clamp the drill bit to be crushed on the machine tool to ensure that all parts are in normal working condition; S2, selecting a graphite electrode (5) whose diagonal length is 0.85-0.92 times the diameter of the alloy tooth, clamping it to the clamping device (3) for locking and fixing, and adjusting the position of the graphite electrode (5) so that it is aligned with the alloy tooth to be crushed; S3, starting the machine tool, controlling the graphite electrode (5) to approach the alloy tooth through the feeding device (1), and starting the electrospark machining, while the cutting fluid is directly sprayed into the machining area through the coolant hole (51) to ensure that the machining area is adequately cooled and lubricated. Through the electrospark machining, an arc is generated between the graphite electrode (5) and the alloy tooth, melting and removing the alloy tooth material, and retaining a certain thickness of the alloy tooth wall during the crushing process; S4. When the alloy tooth is crushed, turn off the machine tool and cutting fluid supply, and use tools to remove the remaining alloy tooth and tooth wall.

8. A drill bit alloy tooth crushing method as claimed in claim 7, characterized in that: In step S3, the speed of the feeding device (1) and the flow rate of the cutting fluid are adjusted to control the temperature during the electrospark machining process, thereby preventing overheating from damaging the graphite electrode (5) or the alloy tooth.

9. A drill bit alloy tooth crushing method as claimed in claim 7, characterized in that: In the step S3, the thickness of the retained alloy tooth wall is controlled between 0.5 mm and 1.0 mm to ensure that the broken alloy teeth can be smoothly separated from the drill body without damaging the drill base.

10. A drill bit alloy tooth crushing method as claimed in claim 7, characterized in that: In the step S4, the residual alloy teeth and the residual tooth walls can be removed by using a special clamping tool or manually knocking.

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