A polishing device and polishing process for drill bits

Abstract

The application discloses a drill bit polishing device and a polishing process, and belongs to the technical field of drill bit processing. The drill bit polishing device comprises a chuck, a clamping jaw mounted on the chuck and a polishing device, characterized in that: a fixed seat is fixedly installed at the middle part of the chuck, an upper wall of the fixed seat is provided with a placing groove for inserting the drill bit, the upper end of a hollow rod is provided with a suction disc communicated with the hollow rod, and a side positioning mechanism for laterally positioning the drill bit is arranged in a transmission cavity. The scheme can pre-position the drill bit in the horizontal direction and the vertical direction, can automatically pre-position the drill bit, avoids the manual positioning condition, can prevent the drill bit from moving or falling before and after clamping, greatly improves the limiting effect on the drill bit, and can improve the polishing quality and effect.

Description

Technical Field

[0001] This invention relates to the field of drill bit processing technology, and more specifically, to a drill bit grinding device and grinding process. Background Technology

[0002] A drill bit is a cutting tool used in drills or drilling machines to cut circular holes. The basic principle of a drill bit is to rotate its cutting edge, cut the workpiece, and then remove drill chips through the drill groove. Commonly used drill bits include twist drills, flat drills, center drills, deep hole drills, and casing drills. During the manufacturing process, drill bits require grinding to ensure they meet production requirements.

[0003] Chinese invention patent publication number CN113352227A discloses a high-safety drill bit grinding device, comprising a worktable, a movable plate, and a lifting seat. The worktable is U-shaped, with mounting blocks on both sides of the top of the worktable. The width of the mounting blocks is greater than the width of the worktable, and guide rails are provided on the mounting blocks. The movable plate is movably mounted on the guide rails via a slider and driven to move by a power component. A mounting plate is provided at the bottom of the movable plate. This invention uses drill bit claws to hold the drill bit, and the lifting seat raises the drill bit so that it is submerged in the grinding sand in the grinding chamber. Grinding is performed by the rotation of the drill bit claws and friction with the grinding sand. The friction generates high pressure and heat, causing the grinding sand to slide and bombard the drill bit simultaneously, performing fine burr removal and tool groove and cutting edge surface treatment, avoiding uneven surface coating, pear-shaped surface, and surface irregularities.

[0004] However, the above-mentioned device still has shortcomings. Currently, the device cannot pre-position the drill bit when fixing it. Generally, the drill bit is placed between the chucks and then held by hand until the chucks clamp and fix the drill bit before grinding. Not only does fixing the drill bit require manual intervention, which is time-consuming and laborious, affecting grinding efficiency, but it may also cause injury to the workers. Moreover, the drill bit may move or fall off and tilt before and after clamping, affecting the clamping and grinding effect.

[0005] Therefore, it is necessary to provide a drill bit grinding device and grinding process to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a drill bit grinding device and grinding process to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a drill bit grinding device, comprising a chuck, jaws mounted on the chuck, and a grinding device, characterized in that: a fixed base is fixedly installed in the middle of the chuck, a placement groove for inserting a drill bit is provided on the upper wall of the fixed base, a hollow rod is movably passed through the lower wall of the placement groove, a suction cup communicating with the upper end of the hollow rod is installed therethrough, a transmission cavity is provided inside the fixed base, and a side positioning mechanism for lateral positioning of the drill bit is provided inside the transmission cavity.

[0008] As a further embodiment of the present invention: the side positioning mechanism includes connecting columns that are symmetrically slidably connected to the top of the transmission cavity. A first spring is fixedly connected between the connecting column and the inner wall of the transmission cavity. The inner walls of the left and right sides of the placement groove are provided with through grooves that communicate with the transmission cavity. A limit clamp is fixedly installed at one end of the connecting column near the through groove. A pulling component that drives the connecting column to move is provided inside the transmission cavity.

[0009] As a further aspect of the present invention: the pulling assembly includes a rotating shaft rotatably connected between the front and rear walls of the transmission cavity, two rope-winding wheels are fixedly installed on the outer wall of the rotating shaft, traction ropes are wound on the rope-winding wheels, the movable ends of the two traction ropes are respectively fixedly connected to the outer walls of the connecting columns on both sides, and a motor that is driven and connected to the rotating shaft is fixedly installed on the front outer wall of the fixed seat.

[0010] As a further aspect of the present invention: the fixed base has a trigger cavity and a sliding groove communicating with it. The inner wall of the sliding groove is slidably connected to the outer wall of the hollow rod. A third spring is fixedly connected between the bottom of the hollow rod and the lower wall of the sliding groove. The trigger cavity is provided with two triggering mechanisms for controlling the start and stop of the motor, which cooperate with the side positioning mechanism.

[0011] As a further aspect of the present invention: the triggering mechanism includes two conductive electrode blocks installed on the inner wall of the triggering cavity, the hollow rod is fixedly connected to the outer wall of the triggering cavity by a connecting rod, the outer wall of the connecting rod is fixedly installed with a first conductive block that can cooperate with the two conductive electrode blocks, the outer wall of the fixed seat is provided with a through hole, the inner wall of the triggering cavity is provided with a connecting groove communicating with the through hole, and the connecting groove is provided with a transition component.

[0012] As a further aspect of the present invention: the adapter assembly includes an adapter rod disposed in the through hole and the connecting groove, and a second spring is connected between the adapter rod and the inner wall of the through hole and the connecting groove, and a second conductive block is installed on the outer wall of the adapter rod located in the trigger cavity.

[0013] As a further aspect of the present invention: an air extraction channel is provided inside the fixed base, a flexible hose communicating with the interior of the hollow rod is installed at one end of the air extraction channel, and a negative pressure machine connected to the other end of the air extraction channel is installed on the rear wall of the fixed base.

[0014] As a further embodiment of the present invention: a connecting plate is fixedly connected to the lower wall of the connecting column, a stop bar is fixedly connected to the lower outer wall of the connecting plate, a stop groove communicating with the transmission cavity is opened on the inner wall of the placement groove, and crossbars are fixedly connected to the left and right outer walls of the hollow rod.

[0015] The present invention also provides a grinding process for a drill bit grinding device, comprising the following steps:

[0016] S1, when using, first put the drill bit to be ground into the placement slot, so that the bottom of the drill bit contacts the suction cup and at the same time drive the hollow rod to continue to press down, start the negative pressure machine so that the suction cup adheres to the bottom of the drill bit;

[0017] S2, while the hollow rod moves down, the side of the drill bit is fixed by the cooperation of the triggering mechanism and the side positioning mechanism. Then the drill bit can be ground by the grinding device. When the side positioning mechanism fixes the drill bit, it will also cause the stop bar to enter the placement groove and block the top of the crossbar.

[0018] S3. After grinding is completed, the negative pressure generated between the suction cup and the drill bit is released by the negative pressure machine. Then, through the cooperation of the triggering mechanism and the side positioning mechanism, the drill bit is released from the lateral restriction. At this time, the drill bit and the hollow rod will spring upward, and the drill bit can be taken out.

[0019] S4. When the drill bit and hollow rod spring up in S3, the hollow rod will drive the piston plate to move up, which will cause the cooling water in the liquid storage chamber to be sprayed out onto the drill bit through the spray head for cooling.

[0020] Compared to existing technologies, the advantages of this invention are as follows: When installing the drill bit, the solution involves placing the drill bit in the placement groove, where a suction cup firmly holds the bottom of the drill bit, thus positioning it vertically. A side positioning mechanism then positions the drill bit from the side, enabling pre-positioning in both the horizontal and vertical directions. This not only achieves automatic pre-positioning of the drill bit, eliminating the need for manual positioning and significantly improving processing efficiency, but also prevents movement or drop before clamping, greatly enhancing the limiting effect and thus improving grinding quality and results. Furthermore, it improves operator safety, is simple and convenient to operate, and allows for quick and easy installation and removal of the drill bit, saving time and effort and significantly improving the efficiency of drill bit grinding. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2This is a three-dimensional structural diagram of the fixing base of the present invention;

[0023] Figure 3 This is a front view of the internal structure of the fixing base of the present invention;

[0024] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0026] Figure 6 for Figure 3 Enlarged structural diagram at point C;

[0027] Figure 7 This is a schematic diagram of a partial three-dimensional structure inside the fixing base of the present invention;

[0028] Figure 8 This is a schematic diagram of a partial structure on the hollow rod of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal side view of the fixing base of the present invention;

[0030] Figure 10 This is a schematic diagram showing the internal morphological changes of the fixing seat after the drill bit is inserted, according to the present invention.

[0031] Figure 11 for Figure 10 Enlarged structural diagram at point D.

[0032] Explanation of the labels in the diagram:

[0033] 1. Processing frame; 2. Grinding device; 3. Fixed base; 4. Placement slot; 5. Hollow rod; 6. Suction cup; 7. Transmission cavity; 8. Trigger cavity; 9. Side positioning mechanism; 901. Connecting column; 902. First spring; 903. Through slot; 904. Limiting clamp; 10. Trigger mechanism; 1001. Conducting electrode block; 1002. Connecting rod; 1003. First conducting block; 1004. Connecting slot; 11. Rotating shaft; 12. Rope winding wheel; 13. Traction rope; 14. Motor; 15. Adapter rod; 16. Second spring; 17. Second conducting block; 18. Sliding slot; 19. Third spring; 20. Air extraction channel; 21. Hose; 22. Negative pressure machine; 23. Connecting plate; 24. Claw; 25. Stop bar; 27. Stop groove; 28. Crossbar. Detailed Implementation

[0034] Example 1:

[0035] Please see Figure 1-3 , Figure 8 and Figure 9-10A drill bit grinding device includes a chuck 1, jaws 24 mounted on the chuck 1, and a grinding device 2. The jaws 24 are a commonly used and mature structure in existing machine tools, and this application has not improved them, so they are not described in detail. A fixed seat 3 is fixedly installed in the middle of the chuck 1. The upper wall of the fixed seat 3 has a placement groove 4 for inserting the drill bit. A hollow rod 5 is movably passed through the lower wall of the placement groove 4. A suction cup 6 communicating with the upper end of the hollow rod 5 is installed. A transmission cavity 7 is opened inside the fixed seat 3. A side positioning mechanism 9 for lateral positioning of the drill bit is provided in the transmission cavity 7. An air extraction channel 20 is opened inside the fixed seat 3. A flexible hose 21 communicating with the interior of the hollow rod 5 is installed at one end of the air extraction channel 20. A negative pressure machine 22 connected to the other end of the air extraction channel 20 is installed on the rear wall of the fixed seat 3. In use, insert the bottom of the drill bit to be ground into the placement slot 4 of the fixing base 3. When the bottom of the drill bit contacts the suction cup 6, simultaneously start the negative pressure machine 22. The negative pressure machine 22 will remove the air from the hollow rod 5 and the suction cup 6 through the air extraction channel 20 and the hose 21, that is, remove the air between the suction cup 6 and the bottom of the drill bit. At the same time, the drill bit continues to press down on the suction cup 6, thereby achieving the goal of the suction cup 6 firmly adhering to the drill bit, thus restricting and positioning the drill bit in the vertical direction. Then, turn off the power to the motor 14, and the side positioning mechanism 9 can be used to assist in positioning the side of the drill bit, such as... Figure 10 As shown, after positioning, the drill bit is fixed by the chuck 24 before grinding. It can be seen that the drill bit is pre-positioned horizontally and vertically by the suction cup 6 and the side positioning mechanism 9. On the one hand, this achieves automatic pre-positioning of the drill bit, avoiding the current need for manual positioning, saving time and effort, and greatly improving processing efficiency. On the other hand, pre-positioning the drill bit before clamping and fixing prevents it from moving or falling off, greatly improving the limiting effect on the drill bit, thereby improving the grinding quality and effect. It also improves the safety of operators, and the operation is simple and convenient.

[0036] Meanwhile, this solution allows for quick and easy installation and removal of drill bits, saving time and effort. It eliminates the significant time required for fixing and removing drill bits, thus greatly improving the efficiency of drill bit grinding and processing.

[0037] In this embodiment, preferably, please refer to [reference needed]. Figure 4 , Figure 7 and Figure 9The side positioning mechanism 9 includes connecting columns 901 that are symmetrically slidably connected to the top of the transmission cavity 7. A first spring 902 is fixedly connected between the connecting columns 901 and the inner wall of the transmission cavity 7. The inner walls of the placement groove 4 on both sides are provided with through grooves 903 that communicate with the transmission cavity 7. A limit clamp 904 is fixedly installed at one end of the connecting column 901 near the through groove 903. A pulling assembly that drives the connecting column 901 to move is provided inside the transmission cavity 7. The pulling assembly includes a rotating shaft 11 that is rotatably connected between the front and rear walls of the transmission cavity 7. Two rope wheels 12 are fixedly installed on the outer wall of the rotating shaft 11. A traction rope 13 is wound on the rope wheels 12. The movable ends of the two traction ropes 13 are fixedly connected to the outer walls of the connecting columns 901 on both sides. A motor 14 that is driven and connected to the rotating shaft 11 is fixedly installed on the outer wall of the front end of the fixed seat 3. After the drill bit is inserted into the placement slot 4 and the hollow rod 5 moves downwards and is positioned at its bottom, the motor 14 is de-energized, and the first spring 902 is released from its compressed state. At this time, the first spring 902 will drive the connecting column 901 and the limiting clamp 904 to move towards the placement slot 4, eventually causing the limiting clamp 904 to enter the placement slot 4 and contact the outer wall of the drill bit. Thus, the limiting clamp 904 can be used to position the side of the drill bit. Figure 11 When the drill bit is removed after grinding, after releasing the vertical positioning restriction of the drill bit, start the motor 14. The motor 14 will drive the rotating shaft 11 and the rope wheel 12 to rotate. The rotation of the rope wheel 12 will tighten the traction rope 13. The movable end of the traction rope 13 will pull the connecting column 901 to move away from the placement slot 4. The connecting column 901 will drive the limiting clamp 904 to gradually move away from the drill bit and enter the through slot 903 and the transmission cavity 7. At this time, the drill bit will lose the lateral positioning restriction, and the drill bit can be easily removed.

[0038] Example 2:

[0039] Based on Example 1, please refer to Figure 3 , Figure 5-6 and Figure 11The fixed base 3 has a trigger cavity 8 and a sliding groove 18 communicating with it. The inner wall of the sliding groove 18 is slidably connected to the outer wall of the hollow rod 5. A third spring 19 is fixedly connected between the bottom of the hollow rod 5 and the lower wall of the sliding groove 18. The trigger cavity 8 is equipped with two trigger mechanisms 10 for controlling the start and stop of the motor, which cooperate with the side positioning mechanism 9. The trigger mechanism 10 includes two conductive electrode blocks 1001 installed on the inner wall of the trigger cavity 8. A connecting rod 1002 is fixedly connected to the outer wall of the hollow rod 5 located in the trigger cavity 8. A movable electrode block is fixedly installed on the outer wall of the connecting rod 1002. The first conductive block 1003, which cooperates with the two conductive electrode blocks 1001, has a through hole on the outer wall of the fixed base 3 and a connecting groove 1004 communicating with the through hole on the inner wall of the trigger cavity 8. A connecting assembly is provided in the connecting groove 1004. The conductive electrode blocks 1001 are electrically connected to the motor 14. The connecting assembly includes a connecting rod 15 disposed in the through hole and the connecting groove 1004. A second spring 16 is connected between the connecting rod 15 and the inner wall of the through hole and the connecting groove 1004. A second conductive block 17 is installed on the outer wall of the connecting rod 15 located in the trigger cavity 8.

[0040] When positioning the drill bit, pressing the drill bit causes the hollow rod 5 to move downwards. The hollow rod 5 then moves towards the interior of the sliding groove 18 and compresses the third spring 19. Simultaneously, as the hollow rod 5 moves downwards, it also drives the connecting rod 1002 downwards. When the first conductive block 1003 on the connecting rod 1002 moves downwards and disengages from between the two conductive electrode blocks 1001, the two conductive electrode blocks 1001 on both sides are no longer connected. At this time, the motor 14, which is electrically connected to the conductive electrode blocks 1001, is de-energized and stops operating. This avoids the need for manual control as described above. The motor 14 is automatically de-energized while positioning the bottom of the drill bit, and then the side of the drill bit can be automatically positioned by the subsequent side positioning mechanism 9. The automation effect is good, and it also greatly avoids the problems of poor timing and inconvenience caused by manual operation, which would also greatly affect the positioning efficiency. After grinding is completed, release the bottom restriction of the drill bit and press down the adapter rod 15. The adapter rod 15 will drive the second conductive block 17 to move down and compress the second spring 16. The second conductive block 17 will move down and gradually contact the conductive electrode blocks 1001 on both sides. After contact, the conductive electrode blocks 1001 on both sides are connected, and then the motor 14 is powered on again. As can be seen from the above, the limiting clamp 904 will gradually move away from the drill bit and enter the through groove 903 and the transmission cavity 7. At this time, the drill bit will lose its lateral positioning. Then the drill bit and the hollow rod 5 will bounce up due to the reverse elastic force of the third spring 19, and the drill bit can be taken out. Furthermore, the upward movement of the hollow rod 5 will cause the connecting rod 1002 and the first conductive block 1003 to move upward. Eventually, the first conductive block 1003 will contact and communicate with the conductive electrode blocks 1001 on both sides. At this time, the adapter rod 15 can be released, and the second conductive block 17 will move upward away from the conductive electrode blocks 1001 on both sides through the second spring 16. The circuit is still connected through the first conductive block 1003, so that the motor 14 remains energized.

[0041] Example 3:

[0042] Based on Example 2, please refer to Figure 3 , Figure 7 and 10 A connecting plate 23 is fixedly connected to the lower wall of the connecting column 901, and a stop bar 25 is fixedly connected to the lower outer wall of the connecting plate 23. A stop groove 27 communicating with the transmission cavity 7 is opened on the inner wall of the placement groove 4. Cross bars 28 are fixedly connected to the left and right outer walls of the hollow rod 5. When the connecting column 901 moves the limiting clamp 904 towards the placement groove 4, the connecting column 901 simultaneously moves the connecting plate 23, which in turn moves the stop bar 25. Finally, when the limiting clamp 904 contacts the fixed drill bit, the stop bar 25 passes through the stop groove 27 and enters the placement groove 4. The stop bar 25 is positioned above the cross bar 28. When grinding the drill bit, the stop bar 25 can restrict the cross bar 28 and the hollow rod 5, further preventing... The drill bit-free device may experience axial movement before and after clamping. On the other hand, when the drill bit drives the hollow rod 5 to move, the force is transmitted through the crossbar 28 to the stop bar 25, and then to the connecting plate 23 and the connecting column 901. This exerts a vertical force on the connecting column 901, which improves the stability of the connecting column 901 and the limiting clamping plate 904. This makes the positioning of the drill bit by the limiting clamping plate 904 more stable, which in turn greatly limits the possibility of vertical movement of the hollow rod 5 and the drill bit, resulting in good performance.

[0043] The present invention also provides a grinding process for a drill bit grinding device, comprising the following steps:

[0044] S1. When using, first place the drill bit to be ground into the placement groove 4 so that the bottom of the drill bit contacts the suction cup 6, and start the negative pressure machine 22 so that the suction cup 6 adheres to the bottom of the drill bit and pre-positions the bottom of the drill bit.

[0045] S2, after positioning the bottom of the drill bit, the side of the drill bit is then positioned by the limiting mechanism 9;

[0046] S3, after the drill bit is pre-positioned, the drill bit is fixed by the jaw 24, and then the drill bit can be ground by the grinding device 2;

[0047] S4. After grinding is completed, the bottom positioning restriction of the suction cup 6 is released by the negative pressure machine 22, and then the lateral positioning restriction of the drill bit is released by the limiting mechanism 9. The drill bit can be taken out by opening the chuck 24.

[0048] Working principle: When using this device, first insert the drill bit to be ground into the placement groove 4 of the fixed base 3. When the bottom of the drill bit contacts the suction cup 6, continue to press the drill bit into the placement groove 4. At the same time, start the negative pressure machine 22. The negative pressure machine 22 will draw away the air in the hollow rod 5 and the suction cup 6 through the air extraction channel 20 and the hose 21, that is, draw away the air between the suction cup 6 and the bottom of the drill bit. At the same time, the drill bit continues to press down on the suction cup 6, so that the suction cup 6 can tightly adhere to the drill bit, thereby restricting and positioning the drill bit in the vertical direction. Initially, when no drill bit is placed, motor 14 is energized. De-energizing motor 14 at this point allows shaft 11 to be free, and the rope pulley 12 no longer tensions the traction rope 13. The compressed first spring 902 then moves the connecting post 901 and the limiting clamp 904 towards the placement slot 4. Ultimately, the limiting clamp 904 enters the placement slot 4 and contacts the outer wall of the drill bit. The limiting clamp 904 then provides auxiliary clamping and positioning of the drill bit's side. Figure 11 As shown, after positioning, the drill bit is fixed by the chuck 24 before grinding. It can be seen that the drill bit is pre-positioned horizontally and vertically by the suction cup 6 and the limiting clamp 904, achieving automatic pre-positioning of the drill bit. This avoids the current need for manual positioning and improves the grinding quality and effect.

[0049] When the drill bit is removed after grinding, first open the chuck 24, then release the negative pressure between the suction cup 6 and the drill bit through the negative pressure machine 22. The drill bit will lose its vertical positioning restriction. At the same time, start the motor 14. The motor 14 will drive the rotating shaft 11 and the rope wheel 12 to rotate. The rotation of the rope wheel 12 will tighten the traction rope 13. The movable end of the traction rope 13 will pull the connecting column 901 to move away from the placement slot 4. The connecting column 901 will drive the limiting clamp 904 to gradually move away from the drill bit and enter the through slot 903 and the transmission cavity 7. At this time, the drill bit will lose its lateral positioning restriction, and the drill bit can be easily removed.

[0050] Furthermore, when positioning the drill bit, pressing the drill bit causes the hollow rod 5 to move downwards. The hollow rod 5 then moves towards the interior of the sliding groove 18 and compresses the third spring 19. Simultaneously, as the hollow rod 5 moves downwards, it also drives the connecting rod 1002 downwards. When the first conductive block 1003 on the connecting rod 1002 moves downwards and disengages from between the two conductive electrode blocks 1001, the two conductive electrode blocks 1001 on both sides are no longer connected. At this time, the motor 14, which is electrically connected to the conductive electrode blocks 1001, is de-energized and stops operating. This avoids the need for manual control as described above. The motor 14 can be automatically de-energized while positioning the bottom of the drill bit. Then, the side of the drill bit can be automatically positioned by the subsequent side positioning mechanism 9. The automation effect is good, and it also greatly avoids the difficulty of manual timing, which would greatly affect the positioning efficiency. After grinding is completed, release the bottom restriction of the drill bit and press down the adapter rod 15. The adapter rod 15 will drive the second conductive block 17 to move down and compress the second spring 16. The second conductive block 17 will move down and gradually contact the conductive electrode blocks 1001 on both sides. After contact, the conductive electrode blocks 1001 on both sides are connected, and then the motor 14 is powered on again. As can be seen from the above, the limiting clamp 904 will gradually move away from the drill bit and enter the through groove 903 and the transmission cavity 7. At this time, the drill bit will lose its lateral positioning. Then the drill bit and the hollow rod 5 will bounce up due to the reverse elastic force of the third spring 19, and the drill bit can be taken out. Furthermore, the upward movement of the hollow rod 5 will cause the connecting rod 1002 and the first conductive block 1003 to move upward. Eventually, the first conductive block 1003 will contact and communicate with the conductive electrode blocks 1001 on both sides. At this time, the adapter rod 15 can be released, and the second conductive block 17 will move upward away from the conductive electrode blocks 1001 on both sides through the second spring 16. The circuit is still connected through the first conductive block 1003, so that the motor 14 remains energized.

[0051] When the connecting column 901 moves the limiting clamp 904 toward the placement groove 4, the connecting column 901 simultaneously moves the connecting plate 23, which in turn moves the stop rod 25. Finally, when the limiting clamp 904 contacts the fixed drill bit, the stop rod 25 passes through the stop groove 27 and enters the placement groove 4. The stop rod 25 will then be positioned above the crossbar 28. During drill bit grinding, the stop rod 25 can restrict the crossbar 28 and the hollow rod 5, further preventing… The drill bit-free device may experience axial movement before and after clamping. On the other hand, when the drill bit drives the hollow rod 5 to move, the force is transmitted through the crossbar 28 to the stop bar 25, and then to the connecting plate 23 and the connecting column 901. This exerts a vertical force on the connecting column 901, which improves the stability of the connecting column 901 and the limiting clamping plate 904. This makes the positioning of the drill bit by the limiting clamping plate 904 more stable, which in turn greatly limits the possibility of vertical movement of the hollow rod 5 and the drill bit, resulting in good performance.

Claims

1. A drill bit grinding device, comprising a chuck, jaws mounted on the chuck, and a grinding device, characterized in that: A fixed base is fixedly installed in the middle of the chuck. The upper wall of the fixed base is provided with a placement groove for inserting the drill bit. A hollow rod is movably passed through the lower wall of the placement groove. A suction cup communicating with the upper end of the hollow rod is installed. A transmission cavity is provided inside the fixed base. A limiting mechanism for lateral positioning of the drill bit is provided in the transmission cavity. The limiting mechanism includes connecting columns that are symmetrically slidably connected to the top of the transmission cavity. A first spring is fixedly connected between the connecting column and the inner wall of the transmission cavity. The inner walls of the left and right sides of the placement groove are provided with through grooves that communicate with the transmission cavity. A limiting clamp is fixedly installed at one end of the connecting column near the through groove. A pulling component that drives the connecting column to move is provided inside the transmission cavity. The pulling assembly includes a rotating shaft rotatably connected between the front and rear walls of the transmission cavity. Two rope-winding wheels are fixedly installed on the outer wall of the rotating shaft. Traction ropes are wound on the rope-winding wheels. The movable ends of the two traction ropes are respectively fixedly connected to the outer walls of the connecting columns on both sides. A motor that is driven and connected to the rotating shaft is fixedly installed on the front outer wall of the fixed seat. The fixed base has a trigger cavity and a sliding groove communicating with it. The inner wall of the sliding groove is slidably connected to the outer wall of the hollow rod. A third spring is fixedly connected between the bottom of the hollow rod and the lower wall of the sliding groove. The trigger cavity is equipped with two trigger mechanisms that cooperate with the limit mechanism to control the start and stop of the motor. The triggering mechanism includes two conductive electrode blocks installed on the inner wall of the triggering cavity. The hollow rod is fixedly connected to the outer wall of the triggering cavity by a connecting rod. The outer wall of the connecting rod is fixedly installed with a first conductive block that can cooperate with the two conductive electrode blocks. The outer wall of the fixed seat has a through hole. The inner wall of the triggering cavity has a connecting groove communicating with the through hole. The connecting groove is provided with a transition component.

2. The drill bit grinding device according to claim 1, characterized in that: The adapter assembly includes an adapter rod disposed in the perforation and the connecting groove. A second spring is connected between the adapter rod and the inner wall of the perforation and the connecting groove. A second conductive block is installed on the outer wall of the adapter rod located in the trigger cavity.

3. The drill bit grinding device according to claim 1, characterized in that: The fixed base has an internal air extraction channel. One end of the air extraction channel is connected to a flexible hose that communicates with the inside of the hollow rod. The rear wall of the fixed base is equipped with a negative pressure machine that is connected to the other end of the air extraction channel.

4. The drill bit grinding device according to claim 1, characterized in that: A connecting plate is fixedly connected to the lower wall of the connecting column, and a stop bar is fixedly connected to the lower outer wall of the connecting plate. A stop groove communicating with the transmission cavity is opened on the inner wall of the placement groove, and crossbars are fixedly connected to the left and right outer walls of the hollow rod.

5. A grinding process for a drill bit grinding device as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. When using, first place the drill bit to be ground into the placement slot so that the bottom of the drill bit contacts the suction cup, and start the negative pressure machine so that the suction cup adheres to the bottom of the drill bit and pre-positions the bottom of the drill bit. S2, after positioning the bottom of the drill bit, the side of the drill bit is then positioned by the limiting mechanism; S3. After the drill bit is pre-positioned, the drill bit is fixed by the jaws, and then the drill bit can be ground by the grinding device. S4. After grinding is completed, the bottom positioning restriction of the suction cup is released by the negative pressure machine, and then the lateral positioning restriction of the drill bit is released by the limiting mechanism. The drill bit can be taken out by opening the chuck.

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