A kind of impact testing device for alloy teeth of drag bit

Abstract

This application relates to an impact testing device for alloy teeth of roller cone drill bits, belonging to the technical field of roller cone drill bits. It includes a frame and a mounting block that is flexibly mounted on the frame. Roller cones are rotatably mounted on the mounting block, with the rotation axis of the roller cones inclined along the height direction of the frame. The frame is equipped with a lifting component for driving the mounting block to rise and fall, and a rotating component for driving the roller cones to rotate. The frame also includes a positioning component for positioning the alloy teeth on the roller cones and an impact component for conducting impact tests on the alloy teeth. This application effectively simulates the impact force experienced by alloy teeth under actual working conditions, improving the accuracy and reliability of the test results, while also increasing the efficiency of the impact test.

Description

Technical Field

[0001] This application relates to the technical field of roller cone drill bits, and in particular to an impact testing device for alloy teeth of roller cone drill bits. Background Technology

[0002] Roller cone drill bits are a widely used type of drilling bit. By applying rotational torque and axial static pressure to the drill bit body, the drill bit body rotates and drives the roller cone to rotate. The roller cone is inlaid with multiple alloy teeth, which are evenly distributed along the conical surface of the roller cone to form multiple rows of tooth rings. This allows the alloy teeth on the roller cone to alternately contact the bottom of the well and press into the formation, so that the alloy teeth can break the formation by chiseling, shearing, scraping and other methods.

[0003] To ensure that alloy teeth can withstand sufficient impact during drilling without breaking or severe wear, reduce the risk of drill bit failure, and minimize trial and error costs in actual drilling, a drop hammer impact test device is often used to conduct impact tests on alloy teeth to evaluate their impact performance. During the test, technicians fix the alloy tooth sample on the drop hammer impact test device and raise the hammer to a set height. The impact load is then applied to the alloy teeth by the free-falling hammer. Technicians then evaluate the impact performance of the alloy teeth by observing the wear, cracks, or fractures. Technicians can also adjust the mass and height of the hammer to simulate the changes in impact force on the alloy teeth when breaking different types of formations.

[0004] Meanwhile, a Chinese patent document with publication number CN222049508U discloses an impact testing device for alloy teeth of roller cone drill bits, including a base, a guide cylinder fixed on the base, and an impact bar coaxially and freely falling inside the guide cylinder. A first alloy tooth fixing block is installed on the base, and a second alloy tooth fixing block is threadedly fixed to the bottom of the impact bar. Technicians can replace the first alloy tooth fixing block and the second alloy tooth fixing block to adjust the fixing angle of the alloy teeth. Then, the technicians raise the impact bar to a set height and let the impact bar fall freely to simulate the axial impact force of alloy teeth with different tilt angles along the drill bit body.

[0005] Regarding the aforementioned technologies, when alloy teeth break up formations at the bottom of a well, the rotational torque and axial static pressure applied to the drill bit body cause the alloy teeth to be subjected not only to axial impact forces along the drill bit body axis, but also to tangential impact forces along the rotation of the roller cones. Existing technologies make it difficult to simulate the tangential impact forces on the alloy teeth, hindering a comprehensive evaluation of their impact performance and reducing the reliability of test results. Furthermore, during testing, to ensure the tilt angle of the alloy teeth matches their actual arrangement on the roller cones and improve the accuracy of the impact test, technicians must individually adjust and fix the angles of the alloy teeth at different locations, resulting in low testing efficiency. Therefore, improvements are needed. Summary of the Invention

[0006] In order to simulate the impact force experienced by alloy teeth under actual working conditions, improve the accuracy and reliability of test results, and increase the efficiency of impact testing, this application provides an impact testing device for alloy teeth of roller cone drill bits.

[0007] The impact testing device for alloy teeth of roller cone drill bits provided in this application adopts the following technical solution:

[0008] An impact testing device for alloy teeth of a roller cone drill bit includes a frame and a mounting block that is flexibly mounted on the frame. The roller cone is rotatably mounted on the mounting block, and the rotation axis of the roller cone is inclined along the height direction of the frame. The frame is provided with a lifting component for driving the mounting block to rise and fall and a rotating component for driving the roller cone to rotate. The frame is also provided with a positioning component for positioning the position of the alloy teeth on the roller cone and an impact component for conducting impact tests on the alloy teeth.

[0009] The positioning component includes a movable block slidably disposed on the frame, a positioning block rotatably disposed on the movable block, and a positioning rod slidably disposed on the positioning block. The positioning rod includes two opposing abutment rods, one end of which is hemispherical and movably abuts against the side wall of the alloy tooth. When the abutment rod is separated from the alloy tooth, the hemispherical ends of the two abutment rods movably abut against each other. The frame is provided with a video monitoring module for monitoring the abutment rods and the alloy tooth, as well as an adjustment component for driving the abutment rods to slide closer to or further away from each other. The frame is also provided with a drive component for driving the movable block to slide and driving the positioning block to rotate.

[0010] The impact assembly includes an impact block slidably disposed on the movable block. The sidewall of the impact block near the alloy teeth is arc-shaped, and the arc side of the impact block is movably pressed against the alloy teeth. The movable block is provided with a clamping member that applies an adjustable torque to the impact block. The clamping member, adjusting member, rotating member, driving member, and lifting member are all electrically connected to the video monitoring module.

[0011] By adopting the above technical solution, when it is necessary to conduct an impact test on the alloy teeth, the technician rotates and installs the toothed wheel on the mounting block. Then the technician starts the equipment, and the driving component drives the movable block to slide until the video monitoring module monitors that the positioning block is located directly below one of the rows of alloy teeth on the toothed wheel. At this time, the adjusting component always makes the two sets of abutment rods slide closer to each other and keep the hemispherical ends of the two abutment rods in each set pressed together. This is the initial state of the abutment rods.

[0012] Then, the rotating component drives the toothed wheel to rotate slowly until the video monitoring module detects that an alloy tooth directly above the abutment rod corresponds to the abutment rod. Then, the video monitoring module controls the lifting component to drive the mounting block and the toothed wheel to descend, so that the side wall of the corresponding alloy tooth abuts against the hemispherical end of the abutment rod, and drives the two abutment rods to slide away from each other. At the same time, the video monitoring module controls the driving component to work, causing the movable block to slide and the positioning block to rotate, and keeping the sliding distance of the two relatively arranged abutment rods consistent until the sliding distance of the two abutment rods no longer changes. At this time, the impact block corresponds to the alloy tooth, and the sliding direction of the abutment rod is perpendicular to the tilt angle direction of the corresponding alloy tooth.

[0013] Because the connecting rods are small in size, it is not easy to install displacement sensors. Therefore, a video monitoring module is used to easily monitor the sliding distance between the two connecting rods.

[0014] Simultaneously, by rotating the positioning block, the tilt angle of the alloy teeth can be obtained. By analyzing the movement trajectory of the abutment rod through the video monitoring module, the distance between the top of the alloy teeth and the impact block can be obtained, thus achieving the positioning of a row of alloy teeth. This is the positioning state of the abutment rod. By repeating the above steps, the positioning of multiple rows of alloy teeth can be achieved.

[0015] Then, the multiple rows of alloy teeth are repositioned sequentially. After each repositioning, the video monitoring module drives the clamping component to work, applies torque to the impact block, and causes the impact block to slide closer to the alloy teeth. At the same time, the adjusting component makes the two abutting rods slide away from each other, so that the abutting rods do not easily obstruct the sliding of the impact block, and the arc side of the impact block abuts against the alloy teeth, thereby simulating the axial static pressure on the alloy teeth. Then, the rotating component drives the toothed wheel to rotate, so that the speed of the toothed wheel is within the speed range of actual working conditions, and the multiple alloy teeth in a row hit the arc side of the impact block in sequence, so that the impact block is subjected to a reverse impact force and slides away from the alloy teeth, thereby simulating the tangential impact force when the alloy teeth break the formation, improving the accuracy and reliability of the impact test results. At the same time, by adjusting the torque applied by the clamping component to the impact block, the impact force of different formations on the alloy teeth can be simulated, which is convenient for impact tests on alloy teeth with different specifications and parameters.

[0016] Meanwhile, since the impact force experienced by each row of alloy teeth is not the same under actual working conditions, by analyzing the positional information of the lifting height of the roller, the tilt angle of the alloy teeth, and the distance between the tip of the alloy teeth and the impact block when positioning multiple rows of alloy teeth, the sequence of contact between each row of alloy teeth and the stratum under actual working conditions can be obtained. Based on the sequence of contact between each row of alloy teeth and the stratum, the torque applied to the alloy teeth by the clamping component can be adjusted, thereby truly reflecting the different stress conditions of the alloy teeth under actual working conditions and improving the accuracy and reliability of the impact test results.

[0017] After the impact test on a row of alloy teeth is completed, the clamping component separates the impact block from the alloy teeth. Then, the rotating component drives the tooth wheel to rotate slowly. The video monitoring module collects images of the surface of the alloy teeth and determines whether there is deformation, cracks or fractures on the surface of the alloy teeth, thereby improving the efficiency of the impact test.

[0018] Optionally, the positioning rods are provided in multiple sets, and the multiple sets of positioning rods are evenly spaced along the height direction of the positioning block. The positioning block is provided with an amplifying element to amplify the sliding distance of the positioning rods.

[0019] By adopting the above technical solution, when positioning the alloy teeth, the lifting component drives the toothed wheel to descend, the driving component drives the movable block to slide and drives the positioning block to rotate, so that the side wall of the alloy teeth abuts against the hemispherical ends of multiple sets of positioning rods in sequence, and drives the two relatively arranged abutment rods to slide away from each other until the sliding distance of the two abutment rods in each group is consistent and the sliding distance of multiple sets of positioning rods no longer changes, thereby achieving the positioning of the alloy teeth.

[0020] Then the video monitoring module drives the gear to continue rotating slowly, causing the corresponding alloy tooth to separate from the abutment rod. At this time, under the action of the adjusting component, the abutment rod slides to the initial state. Then, the adjacent alloy tooth rotates to abut against the hemispherical end of the abutment rod, causing the two abutment rods to slide away from each other and gradually slide closer to each other until the abutment rod separates from the alloy tooth. At this time, the abutment rod slides back to the initial state.

[0021] As the gear rotates once, the first alloy tooth rotates to align with the abutment rod again. The number of times the abutment rod slides closer / away intermittently determines the number of alloy teeth in a row. The video monitoring module collects the sliding distance data of the abutment rod, recording the shape data of the alloy teeth one by one after the impact test. It also analyzes and judges whether there is a deviation in the tilt angle of multiple alloy teeth in the same row, thus detecting the precision of alloy tooth inlay. At the same time, the magnifying component amplifies the sliding distance of the abutment rod, improving the accuracy of the video monitoring module, reducing the precision requirements of the video monitoring module, and reducing equipment costs.

[0022] When some alloy teeth have a tilt angle deviation, they are prone to being subjected to excessive stress, causing excessive damage or breakage, which reduces the accuracy of the impact test results. In this case, technicians need to remove the unqualified gear and test the next gear.

[0023] When the tilt angle of the alloy teeth is consistent, the video monitoring module drives the clamping and rotating parts to work and conducts an impact test on the alloy teeth.

[0024] After the impact test is completed, the clamping component separates the impact block from the alloy tooth. Then, the rotating component drives the tooth wheel to rotate slowly, and the video monitoring module acquires images of the alloy tooth surface to determine whether there are obvious cracks or fractures on the alloy tooth surface.

[0025] Simultaneously, the adjusting component drives the abutment rod to slide, causing the abutment rod to press against the alloy teeth. This allows the abutment rod to slide closer to or further away from the alloy teeth as they move. At the same time, the video monitoring module collects the sliding distance data of the abutment rod, recording the shape data of the alloy teeth one by one after the impact test. Then, the video monitoring module analyzes the shape data of the alloy teeth before and after the impact test to determine the wear or deformation of the alloy teeth.

[0026] Optionally, the amplifying component includes a sliding gear rotatably mounted on the abutment rod, with damping provided at the shaft of the sliding gear, a sliding rack slidably mounted on the positioning block, and a fixed rack also mounted on the positioning block. Both the sliding rack and the fixed rack mesh with the sliding gear, and the sliding rack and the fixed rack are located on opposite sides of the sliding gear, with one end of the sliding rack movably protruding from the side wall of the positioning block.

[0027] By adopting the above technical solution, when the abutting rod slides, the abutting rod drives the sliding gear to slide synchronously, causing the fixed rack to drive the sliding gear to rotate. At this time, the sliding gear slides and drives the sliding rack to slide. Simultaneously, the sliding gear rotates and drives the sliding rack to slide, thereby increasing the sliding distance of the sliding rack and improving the accuracy of the video monitoring module in monitoring the sliding distance of the sliding rack.

[0028] Meanwhile, the damping at the sliding gear shaft prevents the abutment rod from jumping unexpectedly, thus reducing interference with the video monitoring module and improving its accuracy.

[0029] Optionally, the clamping member includes a sliding rod disposed on the impact block. The sliding rod is located on the side of the impact block away from its arc end. The sliding rod slides through the movable block. The cross-section of the sliding rod is polygonal. A first permanent magnet is disposed at the end of the sliding rod away from the impact block. A first electromagnet is disposed on the movable block. The first electromagnet is located between the movable block and the first permanent magnet. A first elastic element is disposed on the movable block to move the impact block toward the first electromagnet. The first electromagnet is electrically connected to the video monitoring module.

[0030] By adopting the above technical solution, when the alloy tooth is subjected to an impact test, the video monitoring module sends out a corresponding electrical signal and energizes the first electromagnet, causing the first electromagnet and the first permanent magnet to attract each other, driving the first permanent magnet to move closer to the first electromagnet, causing the impact block to slide closer to and press against the alloy tooth. At this time, there is a gap between the first electromagnet and the first permanent magnet, and this gap is equal to the difference between the initial gap between the first electromagnet and the first permanent magnet and the distance between the tip of the alloy tooth and the impact block measured during positioning. The video monitoring module adjusts the energization of the first electromagnet by adjusting the gap between the first electromagnet and the first permanent magnet, reducing the influence of the gap on the magnetic force, thereby adjusting the torque applied to the impact block to correct the torque and improve the accuracy of torque control.

[0031] After the impact test is completed, the first electromagnet is de-energized. At this time, the impact block moves towards the first electromagnet under the action of the first elastic element, causing the impact block to separate from the alloy teeth.

[0032] Optionally, the clamping member further includes an ear plate disposed on the sliding rod, the ear plate being located between the movable block and the first permanent magnet, the end of the sliding rod away from the impact block being provided with a thread, and a clamping nut being coaxially threaded on the sliding rod, the sidewalls of the first permanent magnet and the clamping nut being close to each other and the sidewalls of the first permanent magnet and the ear plate being close to each other being movably clamped together, and buffer pads being provided between the first permanent magnet and the clamping nut and between the first permanent magnet and the ear plate.

[0033] By adopting the above technical solution, the impact on the first permanent magnet is reduced by the buffer pad during the impact test, which reduces the risk of the magnetic force of the first permanent magnet being reduced due to the impact, improves the stability of the magnetic force between the first electromagnet and the first permanent magnet when the first electromagnet is energized, improves the stability of the torque applied to the impact block, and thus improves the accuracy of the impact test structure.

[0034] After prolonged impact testing, the first permanent magnet is prone to a decrease in magnetic force due to surface aging and prolonged impact. At this time, technicians can disassemble and inspect the first permanent magnet by rotating the tightening nut, which facilitates the technicians to remagnetize or replace the first permanent magnet.

[0035] Optionally, the adjusting component includes a second permanent magnet disposed on the side of the abutment rod near the hemispherical end, and a second electromagnet disposed on the side wall of the positioning block near the second permanent magnet. Multiple second electromagnets are provided, and each of the multiple second electromagnets corresponds to one of the multiple second permanent magnets. The second electromagnets are magnetically connected to the second permanent magnets. The positioning block is provided with a second elastic element that presses the hemispherical end of the abutment rod against the side wall of the alloy tooth. The second electromagnet is electrically connected to the video monitoring module.

[0036] By adopting the above technical solution, the video monitoring module sends out the corresponding electrical signal and sequentially energizes the second electromagnet and the first electromagnet, causing the second permanent magnet to move closer to the second electromagnet, thereby making the second permanent magnet fit against the second electromagnet and causing the hemispherical end of the abutment rod to slide away from the alloy teeth. This makes it less likely for the abutment rod to block the sliding of the impact block, thus realizing the automated control of the abutment rod sliding to avoid the sliding of the impact block.

[0037] After the impact test is completed, the second electromagnet is de-energized, causing the abutment rod to slide towards the alloy teeth under the action of the second elastic element, and the hemispherical end of the abutment rod to press against the side wall of the alloy side, which facilitates the positioning of the abutment rod in the next test.

[0038] Optionally, a rotating shaft is rotatably mounted on the mounting block, and a toothed gear is coaxially and detachably fixed to the rotating shaft. The rotating component includes a worm gear coaxially mounted on the rotating shaft, and a worm is rotatably mounted on the mounting block. The worm gear meshes with the worm. The mounting block is also provided with a first power component that drives the worm to rotate, and the first power component is electrically connected to the video monitoring module.

[0039] By adopting the above technical solution, when the gear needs to be driven to rotate, the video monitoring module drives the first power component to work and drives the rotary worm to rotate, thereby driving the rotary worm wheel and the rotating shaft to rotate, thus realizing the rotation of the gear. Moreover, when conducting impact tests on the alloy teeth, the rotational torque applied to the gear is increased through the transmission of the rotary worm and the rotary worm wheel.

[0040] When the alloy tooth rotates to correspond with the abutment rod, the first power component stops working. At this time, the self-locking of the worm gear makes it difficult for the alloy tooth to rotate, which facilitates the subsequent positioning of the alloy tooth.

[0041] Optionally, the abutment rod includes a hemispherical part and a connecting rod part. The connecting rod part has a threaded hole on its side wall near the hemispherical part. The hemispherical part has a threaded rod that is threadedly matched with the threaded hole. The hemispherical part is made of a wear-resistant material.

[0042] By adopting the above technical solution, after long-term impact testing, the hemispherical part is prone to wear, which causes errors in the video monitoring module's monitoring of the sliding distance of the abutment rod, reducing the accuracy of the alloy tooth positioning. At this time, the bolt connection makes it easy for technicians to disassemble and replace the hemispherical part regularly. In addition, the hemispherical part is made of wear-resistant material, which improves the service life of the hemispherical part and reduces the frequency of regular maintenance.

[0043] In summary, this application includes at least one of the following beneficial technical effects:

[0044] 1. Before the impact test, the positioning components are used to position the multiple rows of alloy teeth so that the positioning blocks correspond to the alloy teeth. At this time, the impact block is located directly below the alloy teeth. Then, the clamping component applies torque to the impact block and makes the arc side of the impact block abut against the alloy teeth, thereby simulating the axial static pressure on the alloy teeth. Then, the rotating component drives the roller to rotate, so that the speed of the roller is within the speed range of actual working conditions, and multiple alloy teeth in one row hit the arc side of the impact block in sequence, thereby causing the impact block to slide away from the alloy teeth under the reverse impact force, realizing the simulation of the tangential impact force when the alloy teeth break the strata, improving the accuracy and reliability of the impact test results, and improving the efficiency of the impact test.

[0045] 2. During positioning, the toothed roller descends, causing the alloy teeth to sequentially press against multiple sets of positioning rods. This causes the two abutting rods in each set to slide away from each other. Simultaneously, the driving component drives the movable block to slide and the positioning block to rotate, ensuring that the sliding distance of the two abutting rods in each set remains consistent until all sets of positioning rods stop sliding. Then, the rotating component drives the toothed roller to rotate, causing multiple alloy teeth in a row to sequentially press against each other and drive the positioning rods to slide back and forth. By analyzing the sliding distance of the positioning rods, the sliding distance of the movable block, and the rotation angle of the positioning block, the tilt angle of each row of alloy teeth and the distance from the tip of the alloy teeth to the impact block can be obtained. This allows us to determine the sequence of contact between each row of alloy teeth and the formation under actual working conditions. Furthermore, during the impact test, the torque applied by the alloy teeth of the pressing component can be adjusted to accurately reflect the different stress conditions of the alloy teeth under actual working conditions, thereby improving the accuracy and reliability of the impact test results.

[0046] 3. During the positioning of the alloy teeth, the sliding distance data of the abutment rod is collected through the video monitoring module. This allows for the recording of the shape data of the alloy teeth after the impact test, and the analysis and judgment of whether there is a deviation in the tilt angle of multiple alloy teeth in the same row. This enables the detection of the alloy tooth inlay accuracy. When there is a deviation in the tilt angle of the alloy teeth, the technicians need to remove the unqualified toothed wheel and test the next toothed wheel. This reduces the risk of damage or breakage of some alloy teeth due to excessive stress caused by inlay accuracy, and improves the representativeness of the test results.

[0047] 4. After the impact test is completed, the rotating component drives the toothed wheel to rotate slowly, and the video monitoring module collects images of the surface of the alloy teeth one by one to determine whether there are obvious cracks or fractures on the surface of the alloy teeth. Since it is not easy to detect the subtle deformation of the alloy teeth through the video detection module, the video monitoring module collects the sliding distance data of the abutment rod to record the shape data of the alloy teeth one by one after the impact test. At this time, the video monitoring module analyzes the shape data of the alloy teeth before and after the impact test to determine the wear or deformation of the alloy teeth, realizes the rapid evaluation of the impact test results, and improves the efficiency of the impact test.

[0048] 5. By using an amplifying component to magnify the sliding distance of the abutment rod, the accuracy of the video monitoring module is improved, the accuracy requirements of the video monitoring module are reduced, and the equipment cost is lowered. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0050] Figure 2 This is a schematic diagram of the connection structure of the active block, positioning block, and video monitoring module;

[0051] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0052] Figure 4 This is a schematic diagram of the connection structure of the sliding gear, the sliding rack, and the fixed rack.

[0053] Figure 5 This is a schematic diagram of the connection structure of the impact block, the first electromagnet, and the first permanent magnet.

[0054] Reference numerals: 1. Frame; 11. Lifting component; 2. Mounting block; 21. Rotating shaft; 3. Rotating component; 31. Rotating worm gear; 32. Rotating worm; 33. First power component; 4. Positioning assembly; 41. Movable block; 42. Positioning block; 43. Abutting rod; 431. Hemispherical part; 432. Connecting rod part; 433. Threaded rod; 44. Video monitoring module; 441. Industrial camera; 442. Controller; 45. Adjusting component; 451. Second permanent magnet; 452. Second electromagnet; 453. Second elastic component; 4 6. Driving component; 461. Lead screw and nut; 462. Driving lead screw; 463. Second power component; 464. Third power component; 47. Amplifying component; 471. Sliding gear; 472. Sliding rack; 473. Fixed rack; 474. Marking block; 5. Impact assembly; 51. Impact block; 52. Sliding rod; 53. Clamping component; 531. First permanent magnet; 532. First electromagnet; 533. First elastic component; 534. Ear plate; 535. Clamping nut; 536. Buffer pad; 6. Toothed wheel; 7. Alloy tooth. Detailed Implementation

[0055] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0056] This application discloses an impact testing device for alloy teeth of roller cone drill bits. (Refer to...) Figure 1 and Figure 2An impact testing device for alloy teeth of a roller cone drill bit includes a frame 1 and a mounting block 2 that is lifted and connected to the frame 1. A rotating shaft 21 is rotatably connected to the mounting block 2. One end of the rotating shaft 21 is inclined downward and extends along the width direction of the frame 1. The roller cone 6 is coaxially and detachably fixed to the rotating shaft 21. A lifting component 11 for driving the mounting block 2 to rise and fall is provided on the frame 1. In this application, the lifting component 11 is a hydraulic push rod. A positioning component 4 for positioning the position of the alloy teeth 7 on the roller cone 6 is also provided on the frame 1.

[0057] To drive the rotating shaft 21 to rotate, a rotating component 3 is provided on the frame 1, as shown in the figure. Figure 2 The rotating component 3 includes a rotating worm wheel 31 coaxially fixed to one end of the rotating shaft 21, a rotating worm 32 rotatably connected to the mounting block 2, the rotating worm wheel 31 meshing with the rotating worm 32, and a first power component 33 for driving the rotating worm 32 to rotate fixed on the mounting block 2. In this application, the first power component 33 is equipped with a rotating motor.

[0058] Reference Figure 2 and Figure 3 The positioning component 4 includes a movable block 41 slidably connected to the frame 1. The sliding direction of the movable block 41 is parallel to the length direction of the frame 1. The movable block 41 is located below the mounting block 2. A positioning block 42 is rotatably connected to the movable block 41. The rotation axis of the positioning block 42 is consistent with the width direction of the frame 1. A positioning rod is slidably connected to the positioning block 42. The sliding direction of the positioning rod is consistent with the sliding direction of the movable block 41. Multiple sets of positioning rods are provided, and the multiple sets of positioning rods are evenly spaced along the height direction of the positioning block 42. In this application, five sets of positioning rods are provided. In other embodiments, there may also be three, four, or eight sets of positioning rods, and the arrangement method can be consistent with this application. Each set of positioning rods includes two opposing abutment rods 43. One end of the abutment rod 43 is hemispherical and moves against the side wall of the alloy tooth 7. When the abutment rod 43 is separated from the alloy tooth 7, the hemispherical ends of the two abutment rods 43 move against each other. A video monitoring module 44 for monitoring the abutment rod 43 and the alloy tooth 7 is fixed on the movable block 41. The video monitoring module 44 includes two industrial cameras and a controller fixed on the movable block 41. The two industrial cameras are arranged opposite each other along the width direction of the frame 1 and both industrial cameras face the alloy tooth 7. The industrial cameras are electrically connected to the controller. The two industrial cameras facilitate all-round monitoring of the surface quality of the alloy tooth 7.

[0059] To drive the movable block 41 to slide and the positioning block 42 to rotate, a driving component 46 is provided on the frame 1, as shown in the reference. Figure 2The driving component 46 includes a lead screw nut 461 fixed on the movable block 41 and an active lead screw 462 rotatably connected to the frame 1. The lead screw nut 461 and the active lead screw 462 are threadedly matched. A second power component 463 and a third power component 464 are fixed on the frame 1. In this application, both the second power component 463 and the third power component 464 are configured as drive motors. The output end of the second power component 463 is connected to the active lead screw 462, and the output end of the third power component 464 is connected to the rotating shaft of the positioning block 42. In order to avoid the industrial camera, the third power component 464 and the rotating shaft of the positioning block 42 are connected by a universal joint coupling. The first power component 33, the second power component 463, the third power component 464 and the lifting component 11 are all electrically connected to the industrial camera.

[0060] To drive the abutment rods 43 to slide closer / away from each other, an adjusting element 45 is provided on the frame 1, as shown in the reference. Figure 2 and Figure 3 The adjusting component 45 includes a second permanent magnet 451 fixed on the abutment rod 43. The second permanent magnet 451 is located on the side of the abutment rod 43 near the hemispherical end. A second electromagnet 452 is fixed on the side wall of the positioning block 42 near the second permanent magnet 451. There are ten second electromagnets 452, and each of the ten second electromagnets 452 corresponds to one of the ten second permanent magnets 451. The second electromagnets 452 and the second permanent magnets 451 are magnetically connected. A second elastic element 453 is provided on the positioning block 42 to press the hemispherical end of the abutment rod 43 against the side wall of the alloy tooth 7. In this application, the second elastic element 453 is a pressing spring. The second electromagnet 452 is electrically connected to the industrial camera.

[0061] When an impact test is required on the alloy teeth 7, the technician fixes the toothed wheel 6 on the rotating shaft 21, and then starts the equipment. At this time, the second power component 463 drives the active lead screw 462 to rotate, causing the lead screw nut 461 and the movable block 41 to slide along the width direction of the frame 1 until the industrial camera monitors that the positioning block 42 is located directly below one row of alloy teeth 7 on the toothed wheel 6. At this time, the abutment rods 43 slide close to each other in pairs under the action of the second elastic component 453, and keep the hemispherical ends of each pair of abutment rods 43 pressed together. This is the initial state of the abutment rods 43.

[0062] Simultaneously, the controller stops the second power component 463 and drives the first power component 33 to rotate the rotary worm gear 32, thereby causing the rotary turbine and gear 6 to rotate slowly until the industrial camera monitors an alloy tooth 7 directly above the abutment rod 43 corresponding to the abutment rod 43. Then, the controller controls the lifting component 11 to drive the mounting block 2 and gear 6 to descend, so that the sidewall of the corresponding alloy tooth 7 abuts against the hemispherical ends of the five sets of positioning rods in sequence, and causes the two relatively arranged abutment rods 43 to slide away from each other. At the same time, the controller controls the second power component 463 and the third power component 464 to work, thereby causing the movable block 41 to slide and the positioning block 42 to rotate, and making the sliding distance of the two relatively arranged abutment rods 43 consistent, until the sliding distance of the two abutment rods 43 in each group is consistent and the sliding distance of the five sets of positioning rods no longer changes, thus achieving the positioning of the alloy tooth 7. At this time, the impact block 51 corresponds to the alloy tooth 7, and the sliding direction of the abutment rod 43 is perpendicular to the tilt angle direction of the corresponding alloy tooth 7.

[0063] Then the controller controls the first power component 33 to work, thereby driving the toothed wheel 6 to continue to rotate slowly, so that the corresponding alloy tooth 7 separates from the abutment rod 43. At this time, under the action of the second elastic component 453, the hemispherical side of the abutment rod 43 is always pressed against the alloy tooth 7. Then the adjacent alloy tooth 7 rotates to press against the hemispherical end of the abutment rod 43, causing the two abutment rods 43 to slide away from each other and gradually slide closer to each other until the abutment rod 43 separates from the alloy tooth 7. At this time, the abutment rod 43 slides back to the initial state.

[0064] As the gear 6 rotates once, the first alloy tooth 7 rotates to correspond with the abutment rod 43 again. The number of times the abutment rod 43 slides closer / away intermittently can be determined. The sliding distance data of the abutment rod 43 is collected by an industrial camera to record the shape data of the alloy teeth 7 after the impact test one by one, and to analyze and judge whether there is a deviation in the tilt angle of the multiple alloy teeth 7 in the same row, so as to detect the inlay accuracy of the alloy teeth 7. By repeating the above steps, the positioning of multiple rows of alloy teeth 7 can be achieved.

[0065] When some alloy teeth 7 have a tilt angle deviation, they are prone to being subjected to excessive stress, causing excessive damage or breakage, thus reducing the accuracy of the impact test results. In this case, technicians need to remove the unqualified toothed cone 6 and test the next toothed cone 6.

[0066] When the tilt angle of the alloy teeth 7 is consistent, the controller drives the clamping part 53 and the rotating part 3 to work and conduct an impact test on the alloy teeth 7.

[0067] Furthermore, to amplify the sliding distance of the abutment rod 43 and improve the accuracy of industrial camera monitoring, the positioning block 42 is equipped with an amplification component 47, for reference. Figure 4 The enlarged component 47 includes a sliding gear 471 rotatably connected to the abutment rod 43. The rotation axis of the sliding gear 471 is vertically arranged and perpendicular to the sliding direction of the abutment rod 43. Damping is provided at the shaft of the sliding gear 471. A sliding rack 472 is slidably connected to the positioning block 42. The sliding direction of the sliding rack 472 is consistent with the sliding direction of the abutment rod 43. A fixed rack 473 is also fixed on the positioning block 42. Both the sliding rack 472 and the fixed rack 473 mesh with the sliding gear 471. The sliding rack 472 and the fixed rack 473 are located on opposite sides of the sliding gear 471. One end of the sliding rack 472 protrudes movably from the side wall of the positioning block 42.

[0068] A marker block 474 is fixed to the protruding end of the sliding rack 472. The surface of the marker block 474 is treated with frosting, blackening, or sprayed with an anti-reflective coating. Anything that can reduce the reflectivity of the surface of the marker block 474 is acceptable, thereby reducing the reflection of light by the marker block 474 when the industrial camera is sampling and improving the sampling accuracy of the industrial camera.

[0069] When the abutment rod 43 slides, it drives the sliding gear 471 to slide synchronously, causing the fixed rack 473 to drive the sliding gear 471 to rotate. At this time, the sliding gear 471 slides and drives the sliding rack 472 to slide. Simultaneously, the sliding gear 471 rotates and drives the sliding rack 472 to slide, thereby increasing the sliding distance of the sliding rack 472 and improving the accuracy of the industrial camera in monitoring the sliding distance of the sliding rack 472.

[0070] Meanwhile, because the sliding gear 471 has damping at its shaft, the abutment rod 43 is less likely to jump unexpectedly, which will not interfere with the industrial camera and improve the accuracy of industrial camera monitoring.

[0071] Furthermore, in order to reduce the detection error caused by wear of the abutment rod 43, refer to Figure 4 The abutment rod 43 includes a hemispherical part 431 and a connecting rod part 432. The connecting rod part 432 has a threaded hole on the side wall near the hemispherical part 431. A threaded rod 433 is fixed on the hemispherical part 431. The threaded rod 433 is threaded and adapted to the threaded hole. The hemispherical part 431 is made of wear-resistant material. In this application, the material of the hemispherical part 431 is tungsten carbide. In other embodiments, the material of the hemispherical part 431 can also be tungsten steel, ceramic, etc.

[0072] After prolonged impact testing, the hemispherical part 431 is prone to wear, which can cause errors in the industrial camera's monitoring of the sliding distance of the abutment rod 43, reducing the accuracy of positioning the alloy tooth 7. At this time, the bolt connection makes it easy for technicians to disassemble and replace the hemispherical part 431 regularly. In addition, the hemispherical part 431 is made of wear-resistant material, which improves the service life of the hemispherical part 431 and reduces the frequency of regular maintenance.

[0073] Furthermore, in order to simulate the impact force experienced by the alloy tooth 7 under actual working conditions and to conduct impact tests on the alloy tooth 7, an impact assembly 5 is installed on the frame 1, referring to... Figure 1 The impact assembly 5 includes an impact block 51 slidably connected to the movable block 41. The sliding direction of the impact block 51 is consistent with the height direction of the frame 1. The side wall of the impact block 51 near the alloy tooth 7 is arc-shaped. The arc side of the impact block 51 is in contact with the alloy tooth 7. A sliding rod 52 is fixed on the impact block 51. The sliding rod 52 is located on the side of the impact block 51 away from its arc end. The sliding rod 52 is slidably arranged through the movable block 41. The cross section of the sliding rod 52 is polygonal. In this application, the cross section of the sliding rod 52 is set to a regular quadrilateral shape. In other embodiments, the cross section of the sliding rod 52 can also be set to a triangular, hexagonal, or octagonal shape, as long as the sliding rod 52 can slide without easily rotating relative to the other side.

[0074] The movable block 41 is provided with a clamping member 53 that applies an adjustable torque to the impact block 51, see reference. Figure 1 and Figure 5 The clamping member 53 includes a first permanent magnet 531 detachably fixed to the sliding rod 52 at the end away from the impact block 51. A first electromagnet 532 is fixed to the bottom of the movable block 41. The first electromagnet 532 is located between the movable block 41 and the first permanent magnet 531. The sliding rod 52 is arranged through the first electromagnet 532. A first elastic member 533 is provided on the movable block 41 to move the impact block 51 toward the first electromagnet 532. In this application, the first elastic member 533 is set as a return spring. The first electromagnet 532 is electrically connected to the industrial camera.

[0075] Meanwhile, the clamping component 53 also includes an ear plate 534 fixed on the sliding rod 52. The ear plate 534 is located between the movable block 41 and the first permanent magnet 531. The end of the sliding rod 52 away from the impact block 51 is threaded, and a clamping nut 535 is coaxially threaded on the sliding rod 52. The side walls of the first permanent magnet 531 and the clamping nut 535 approach each other, and the side walls of the first permanent magnet 531 and the ear plate 534 approach each other, are movable and clamped together. By rotating the clamping nut 535, technicians can disassemble and inspect the first permanent magnet 531, which is convenient for technicians to remagnetize or replace the first permanent magnet 531.

[0076] Buffer pads 536 are provided between the first permanent magnet 531 and the clamping nut 535, and between the first permanent magnet 531 and the ear plate 534. In this application, the buffer pads 536 are made of polyurethane. In other embodiments, the buffer pads 536 can also be made of impact-resistant buffer materials such as foamed polypropylene or carbon fiber reinforced materials to reduce the impact on the first permanent magnet 531 during the impact test, reduce the risk of the first permanent magnet 531 being impacted and causing a decrease in magnetic force, improve the stability of the magnetic force between the first electromagnet 532 and the first permanent magnet 531 when the first electromagnet 532 is energized, improve the stability of the torque applied to the impact block 51, and thus improve the accuracy of the impact test structure.

[0077] After positioning the multi-row alloy teeth 7, the controller sends an electrical signal and sequentially energizes the second electromagnet 452 and the first electromagnet 532, causing the second permanent magnet 451 to move closer to the second electromagnet 452. This brings the second permanent magnet 451 into contact with the second electromagnet 452, and causes the hemispherical end of the abutment rod 43 to slide away from the alloy teeth 7, thus making it less likely for the abutment rod 43 to obstruct the sliding of the impact block 51.

[0078] Then, the first electromagnet 532 and the first permanent magnet 531 attract each other, causing the first permanent magnet 531 to move closer to the first electromagnet. This causes the impact block 51 to slide closer to and press against the alloy tooth 7, thus achieving automated control of the sliding of the contact rod 43 to avoid the sliding of the impact block 51. At this time, there is a gap between the first electromagnet 532 and the first permanent magnet 531, and this gap is equal to the difference between the initial gap between the first electromagnet 532 and the first permanent magnet 531 and the distance between the top of the alloy tooth 7 and the impact block 51 measured during positioning. The controller adjusts the current through the first electromagnet 532 according to the gap between the first electromagnet 532 and the first permanent magnet 531 to reduce the influence of the gap on the magnetic force, thereby adjusting the torque applied to the impact block 51 for correction and improving the accuracy of torque control, thereby simulating the axial static pressure on the alloy tooth 7.

[0079] Simultaneously, the controller analyzes the positional information of the lifting height of the gear 6, the tilt angle of the alloy teeth 7, and the distance between the top of the alloy teeth 7 and the impact block 51 when positioning the alloy teeth 7. This information is used to obtain the sequence of contact between each row of alloy teeth 7 and the ground under actual working conditions. The controller then adjusts the current through the first electromagnet 532 according to the sequence of contact between each row of alloy teeth 7 and the ground, thereby adjusting the torque applied by the alloy teeth 7. This accurately reflects the different stress conditions of the alloy teeth 7 under actual working conditions, improving the accuracy and reliability of the impact test results.

[0080] Then, the first power component 33 drives the toothed wheel 6 to rotate, so that the rotational speed of the toothed wheel 6 is within the rotational speed range under actual working conditions, and causes multiple alloy teeth 7 in a row to strike the arc side of the impact block 51 in sequence, so that the impact block 51 is subjected to reverse impact force and slides away from the alloy teeth 7, thereby simulating the tangential impact force when the alloy teeth 7 break the strata, and improving the accuracy and reliability of the impact test results.

[0081] After the impact test is completed, the controller de-energizes the first electromagnet 532 and the second electromagnet 452 in sequence. At this time, the impact block 51 slides away from the alloy tooth 7 under the action of the first elastic element 533 and separates from the alloy tooth 7. Then, the abutment rod 43 slides towards the alloy tooth 7 under the action of the second elastic element 453 and abuts the alloy tooth 7. Then, the first power element 33 drives the toothed wheel 6 to rotate slowly and the industrial camera collects images of the surface of the alloy tooth 7 to determine whether there are obvious cracks or fractures on the surface of the alloy tooth 7.

[0082] Simultaneously, the abutment rod 43 slides towards / away from the alloy tooth 7 as the alloy tooth 7 moves. At the same time, the industrial camera collects the sliding distance data of the abutment rod 43, realizing the recording of the shape data of the alloy tooth 7 after the impact test. At this time, the controller analyzes the shape data of the alloy tooth 7 before and after the impact test, and can determine the wear or deformation of the alloy tooth 7.

[0083] The implementation principle of the impact testing device for alloy teeth of roller cone drill bits in this application embodiment is as follows: When it is necessary to conduct an impact test on the alloy teeth 7, the technician fixes the roller cone 6 on the rotating shaft 21, and then the technician starts the equipment. At this time, the second power component 463 drives the active lead screw 462 to rotate, which drives the lead screw nut 461 and the movable block 41 to slide along the width direction of the frame 1 until the industrial camera monitors that the positioning block 42 is located directly below one row of alloy teeth 7 on the roller cone 6.

[0084] Then, the controller controls the first power component 33 to drive the rotary worm gear 32 to rotate, which in turn drives the rotary turbine and the rotating shaft 21 to rotate, thereby driving the gear 6 to rotate slowly until the industrial camera monitors an alloy tooth 7 directly above the abutment rod 43 corresponding to the abutment rod 43. Then, the controller controls the lifting component 11 to drive the mounting block 2 and the gear 6 to descend, so that the sidewall of the corresponding alloy tooth 7 abuts against the hemispherical ends of the five sets of positioning rods in sequence, and drives the two abutment rods 43 arranged opposite to slide away from each other. At this time, the abutment rods 43 slide towards each other in pairs under the action of the second elastic component 453, and keep the hemispherical ends of the two abutment rods 43 in each group abutting against each other. At the same time, the controller controls the second power component 463 and the third power component 464 to work, thereby driving the movable block 41 to slide and driving the positioning block 42 to rotate, and keeping the sliding distance of the two abutment rods 43 arranged opposite to each other consistent, until the sliding distance of the two abutment rods 43 in each group is consistent and the sliding distance of the five sets of positioning rods no longer changes, thus realizing the positioning of the alloy tooth 7.

[0085] Then, the controller controls the first power component 33 to work, thereby driving the gear 6 to continue to rotate slowly, causing the corresponding alloy teeth 7 to separate from the abutment rod 43 and gradually slide closer to each other. As the gear 6 rotates one revolution, the first alloy tooth 7 rotates to correspond with the abutment rod 43 again. By measuring the number of times the abutment rod 43 slides closer / away intermittently, the number of alloy teeth 7 in a row can be determined. The sliding distance data of the abutment rod 43 is collected by an industrial camera, and the shape data of the alloy teeth 7 after the impact test is recorded one by one. The tilt angle of the multiple alloy teeth 7 in the same row is analyzed and judged to determine whether there is a deviation, thus realizing the detection of the inlay accuracy of the alloy teeth 7. By repeating the above steps, the positioning of multiple rows of alloy teeth 7 can be achieved.

[0086] When some alloy teeth 7 have a tilt angle deviation, the technicians remove the defective gear 6 and test the next gear 6.

[0087] When the tilt angles of the alloy teeth 7 are consistent, the controller sends an electrical signal and sequentially energizes the second electromagnet 452 and the first electromagnet 532, causing the second permanent magnet 451 to move closer to the second electromagnet 452. The abutment rod 43 can easily block the sliding of the impact block 51. Then, the first electromagnet 532 and the first permanent magnet 531 attract each other, causing the first permanent magnet 531 to move closer to the first electromagnet, so that the impact block 51 slides closer to and presses against the alloy teeth 7. At the same time, the data information collected by the industrial camera during positioning adjusts the current through the first electromagnet 532 to adjust the torque applied to the alloy teeth 7, thereby truly reflecting the different force conditions of the alloy teeth 7 under actual working conditions.

[0088] Then the controller controls the first power component 33 to rotate, thereby rotating the gear 6 and keeping the speed of the gear 6 within the actual working range. The controller also causes multiple alloy teeth 7 in a row to strike the arc side of the impact block 51 in sequence, thereby causing the impact block 51 to slide away from the alloy teeth 7 under the reverse impact force, thus realizing the impact test on a row of alloy teeth 7.

[0089] After the impact test is completed, the controller de-energizes the first electromagnet 532 and the second electromagnet 452 in sequence. At this time, the impact block 51 slides away from the alloy tooth 7 under the action of the first elastic element 533 and separates from the alloy tooth 7. Then, the abutment rod 43 slides towards the alloy tooth 7 under the action of the second elastic element 453 and abuts the alloy tooth 7. Then, the first power element 33 drives the toothed wheel 6 to rotate slowly and the industrial camera collects images of the surface of the alloy tooth 7 to determine whether there are obvious cracks or fractures on the surface of the alloy tooth 7.

[0090] Simultaneously, the abutment rod 43 slides towards / away from the alloy tooth 7 as the alloy tooth 7 moves. At the same time, the industrial camera collects the sliding distance data of the abutment rod 43, realizing the recording of the shape data of the alloy tooth 7 after the impact test. At this time, the controller analyzes the shape data of the alloy tooth 7 before and after the impact test, and can determine the wear or deformation of the alloy tooth 7.

[0091] By repeating the above steps, impact tests can be performed on the multi-row alloy teeth 7.

[0092] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drag bit alloy tooth impact testing device characterized by: The device comprises a rack and a mounting block arranged on the rack and lifted, a roller is rotatably arranged on the mounting block, the rotation axis of the roller is arranged along the height direction of the rack, the rack is provided with a lifting device for lifting the mounting block and a rotating device for rotating the roller, the rack is further provided with a positioning assembly for positioning the position of the alloy teeth on the roller and an impact assembly for impact test of the alloy teeth; The positioning assembly comprises a movable block arranged on the rack, a positioning block is rotatably arranged on the movable block, a positioning rod is slidably arranged on the positioning block, the positioning rod comprises a plurality of groups, the plurality of groups of the positioning rod are uniformly arranged along the height direction of the positioning block, the positioning rod comprises two oppositely arranged abutting rods, one end of the abutting rod is hemispherical and is movably abuttingly arranged on the side wall of the alloy teeth, when the abutting rod is separated from the alloy teeth, the hemispherical ends of the two abutting rods are movably abuttingly arranged, the rack is provided with a video monitoring module for monitoring the abutting rod and the alloy teeth and an adjusting device for driving the abutting rod to slide close to / away from each other, the rack is further provided with a driving device for driving the movable block to slide and the positioning block to rotate; The impact assembly comprises an impact block arranged on the movable block, the side wall of the impact block close to the alloy teeth is arc-shaped, the arc side of the impact block is movably abuttingly arranged on the alloy teeth, the movable block is provided with an abutting device for applying an adjustable torque to the impact block, the abutting device, the adjusting device, the rotating device, the driving device and the lifting device are electrically connected with the video monitoring module; The adjusting device comprises a second permanent magnet arranged on one side of the abutting rod close to the hemispherical end, a second electromagnet is arranged on the side wall of the positioning block close to the second permanent magnet, the second electromagnet comprises a plurality of groups, the plurality of groups of the second electromagnet correspond to the plurality of groups of the second permanent magnet, the second electromagnet is magnetically connected with the second permanent magnet, the positioning block is provided with a second elastic element for abutting the hemispherical end of the abutting rod against the side wall of the alloy teeth, the second electromagnet is electrically connected with the video monitoring module; During positioning, the roller is lowered to make the alloy teeth abuttingly arranged on the plurality of groups of the positioning rod, the two abutting rods of each group slide away from each other, at the same time, the driving device drives the movable block to slide and the positioning block to rotate, so that the sliding distance of the two abutting rods of each group is always consistent, until the plurality of groups of the positioning rod no longer slide, then the rotating device drives the roller to rotate, so that the plurality of alloy teeth of one row abuttingly arranged on the plurality of groups of the positioning rod and drive the positioning rod to reciprocatingly slide, by analyzing the sliding distance of the positioning rod, the sliding distance of the movable block and the rotation angle of the positioning block, the inclination angle of each row of alloy teeth and the distance between the top end of the alloy teeth and the impact block can be obtained, the order of contact between each row of alloy teeth and the stratum under actual working conditions can be obtained, and then during impact test, the torque applied to the alloy teeth by the abutting device is adjusted, so that the different stress conditions of the alloy teeth under actual working conditions can be truly reflected.

2. A drag bit alloy tooth impact testing device as defined in claim 1 wherein: The positioning block is provided with an amplifying element for amplifying the sliding distance of the positioning rod.

3. A drag bit alloy tooth impact testing device as defined in claim 2 wherein: The amplification piece comprises a sliding gear rotatably arranged on the abutting rod, a damping device is arranged at the rotating shaft of the sliding gear, a sliding rack is slidably arranged on the positioning block, a fixed rack is further arranged on the positioning block, the sliding rack and the fixed rack are engaged with the sliding gear, and the sliding rack and the fixed rack are respectively located on opposite sides of the sliding gear, and one end of the sliding rack protrudes from the side wall of the positioning block.

4. A drag bit alloy tooth impact testing device as defined in claim 3 wherein: The sliding rod is arranged on the side of the impact block away from the arc end, the sliding rod is slidably arranged through the movable block, the cross section of the sliding rod is in a polygonal shape, the abutting piece comprises a first permanent magnet arranged at the end of the sliding rod away from the impact block, the movable block is provided with a first electromagnet, the first electromagnet is located between the movable block and the first permanent magnet, the movable block is provided with a first elastic piece for moving the impact block towards the first electromagnet, and the first electromagnet is electrically connected with the video monitoring module.

5. A drag bit alloy tooth impact testing device as defined in claim 4 wherein: The abutting piece further comprises an ear plate arranged on the sliding rod, the ear plate is located between the movable block and the first permanent magnet, the end of the sliding rod away from the impact block is provided with a thread, the sliding rod is coaxially provided with a tightening nut, the side walls of the first permanent magnet and the tightening nut that are close to each other, and the side walls of the first permanent magnet and the ear plate that are close to each other are movably abutted, and the first permanent magnet and the tightening nut, and the first permanent magnet and the ear plate are both provided with buffer pads.

6. A drag bit alloy tooth impact testing device as defined in claim 5 wherein: The mounting block is rotatably provided with a rotating shaft, and the roller is coaxially and detachably fixed to the rotating shaft, the rotating piece comprises a rotating worm gear coaxially arranged on the rotating shaft, the mounting block is rotatably provided with a rotating worm, the rotating worm gear is engaged with the rotating worm, and the mounting block is further provided with a first power piece for driving the rotating worm to rotate, and the first power piece is electrically connected with the video monitoring module.

7. A drag bit alloy tooth impact testing device as defined in claim 6 wherein: The abutting rod comprises a hemispherical part and a connecting rod part, a threaded hole is arranged in the side wall of the connecting rod part close to the hemispherical part, a threaded rod is arranged on the hemispherical part, the threaded rod is threadedly connected with the threaded hole, and the hemispherical part is made of wear-resistant material.

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