Drill bit cutting edge wear condition assessment device

Abstract

A drill bit cutting edge wear condition assessment device, belonging to the field of intelligent equipment testing technology, is mainly used to accurately assess the wear condition of drill bit cutting edges. The device includes a main body, a position sensor, a torque sensor, and a speed sensor. The main body comprises a top plate and a bottom plate. A drive assembly is mounted on the top plate, connecting to the drill bit to be assessed and enabling it to move in lifting and rotation. A fixing assembly is mounted on the bottom plate to fix a rock sample. One end of the position sensor is fixedly mounted, and the other end is connected to the drill bit to be assessed, used to monitor the axial position of the drill bit in real time. The torque sensor is mounted on the shaft of the drill bit to monitor the torque value of the shaft during drilling in real time. A speed measuring gear is mounted on the shaft, and a speed sensor is fixed relative to the speed measuring gear to monitor the gear frequency signal in real time to obtain the speed parameters of the drill bit.

Description

Technical Field

[0001] This application belongs to the field of intelligent equipment testing technology, specifically relating to a device for assessing the wear condition of drill bit cutting edges. Background Technology

[0002] In fields such as petroleum, geological exploration, mining, and engineering construction, drill bits, as core rock-breaking tools, directly affect drilling efficiency, energy consumption, and construction safety due to the wear condition of their cutting edges. With the increasing prevalence of complex working conditions such as hard rock drilling and deep hole drilling, problems such as decreased drilling efficiency and shortened tool life caused by drill bit wear are becoming increasingly prominent. How to accurately assess the wear condition of drill bit cutting edges has become a key technical bottleneck in improving the level of intelligent drilling operations.

[0003] Currently, traditional drill bit wear detection relies heavily on manual offline observation, such as periodically disassembling the drill bit for visual inspection. However, manual inspection is greatly affected by the operator's experience and judgment standards, making it difficult to accurately quantify the degree of wear and easily leading to misjudgments of the wear condition. Utility Model Content

[0004] In view of this, this application provides a drill bit cutting edge wear condition assessment device, the main purpose of which is to accurately assess the wear condition of the drill bit cutting edge.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions:

[0006] This application provides a device for evaluating the wear condition of drill bit cutting edges, including:

[0007] The device body includes a top plate and a bottom plate. A drive assembly is provided on the top plate. The drive assembly is used to connect to the drill bit to be evaluated and can drive the drill bit to be evaluated to perform lifting and rotating movements. A fixing assembly is provided on the bottom plate. The fixing assembly is used to fix the rock sample.

[0008] A position sensor, one end of which is fixedly installed and the other end is connected to the drill bit to be evaluated, is used to monitor the axial position of the drill bit to be evaluated in real time;

[0009] A torque sensor is installed on the shaft of the drill bit to be evaluated to monitor the torque value of the shaft in real time during the drilling process.

[0010] A speed sensor is provided, and a speed measuring gear is sleeved on the rotating shaft. The speed sensor is fixed relative to the speed measuring gear and is used to monitor the tooth frequency signal of the speed measuring gear in real time in order to obtain the speed parameters of the drill bit to be evaluated.

[0011] Optionally, the driving component includes:

[0012] A mounting bracket is provided with a guide groove, which extends along the axial direction of the drill bit to be evaluated;

[0013] A rotary drive unit is slidably connected to the guide groove via a guide block. One end of the rotating shaft is connected to the output shaft of the rotary drive unit, and the other end is connected to the drill bit to be evaluated via a clamp. The rotary drive unit is used to drive the rotating shaft and the drill bit to be evaluated to rotate.

[0014] A lifting drive unit is provided, which is mounted on the fixed frame. The output end of the lifting drive unit is connected to the rotary drive unit. The lifting drive unit is used to drive the rotary drive unit to move up and down along the guide groove on the fixed frame, thereby driving the drill bit to be evaluated to achieve axial feed movement.

[0015] Optionally, the driving component further includes:

[0016] A transmission rod, one end of which is connected to the output end of the lifting drive unit;

[0017] A transmission block is sleeved on the transmission rod and threadedly engaged with it. The transmission block is also connected to the rotary drive unit. When the lifting drive unit drives the transmission rod to rotate, the transmission block moves along the axial direction of the transmission rod, thereby driving the rotary drive unit to rise and fall along the guide groove.

[0018] Optionally, the main body of the device further includes:

[0019] A support plate, one end of which is connected to the frame of the main body of the device, and the other end of which is connected to the fixing frame.

[0020] Optionally, the fixing component includes:

[0021] A placement platform is detachably mounted on the base plate, and a rock trough is provided on the placement platform for accommodating and fixing the rock sample.

[0022] Optionally, the fixing component further includes:

[0023] Two fixing plates are arranged opposite each other. The upper surface of the base plate is provided with a boss. The two fixing plates are respectively arranged on opposite sides of the placement platform near the boss. Each fixing plate is provided with a through hole for inserting a screw. The screw is threaded to the fixing plate. A rubber pad is provided on the end of the screw facing the boss.

[0024] Optionally, the thickness of the rubber pad decreases along the direction from the boss toward the placement platform.

[0025] Optionally, the distance between the detection surface of the speed sensor and the tip circle of the speed measuring gear is 1mm to 3mm, and the detection surface of the speed sensor is parallel to the center line of the speed measuring gear.

[0026] Optionally, the drill bit cutting edge wear condition assessment device further includes:

[0027] The controller is located on one side of the main body of the device and is electrically connected to the position sensor, the torque sensor and the speed sensor respectively.

[0028] Optionally, the controller is equipped with a display screen, which is a touch screen.

[0029] By employing the above technical solution, this application has at least the following beneficial effects:

[0030] The drill bit cutting edge wear condition assessment device provided in the embodiments of this application achieves real-time tracking of the axial displacement of the drill bit during drilling by fixing one end of a position sensor and connecting the other end to the drill bit to be assessed. By analyzing the trend of axial position changes, such as feed rate and vibration amplitude, the degree of wear of the cutting edge can be indirectly determined, providing dynamic displacement data support for wear condition assessment. Specifically, when the cutting edge of the drill bit to be assessed wears, its cutting efficiency decreases, resulting in a decrease in the drilling speed of the drill bit, such as a shortened axial feed distance in the same time period or an increase in abnormal pauses during the feed process. By capturing such displacement anomalies, the position sensor can help identify the development process of the wear condition.

[0031] The drill bit cutting edge wear assessment device provided in the embodiments of this application can monitor the torque changes of the drill bit during drilling in real time by setting a torque sensor on the shaft of the drill bit to be assessed. Specifically, when the cutting edge of the drill bit to be assessed wears, its cutting efficiency decreases, resulting in an increase in the frictional resistance between the cutting edge and the rock sample. This increase in frictional resistance is directly reflected in the increase of the shaft torque value. Through real-time quantitative analysis of the torque value, the wear stage of the cutting edge, such as initial wear, moderate wear, or severe wear, can be accurately identified.

[0032] The drill bit cutting edge wear assessment device provided in the embodiments of this application, by mounting a speed measuring gear on the shaft of the drill bit to be assessed and configuring a speed sensor fixed relative to the speed measuring gear, can monitor the gear frequency signal in real time to calculate the speed parameters of the drill bit to be assessed. Specifically, when the cutting edge of the drill bit to be assessed wears, its cutting efficiency decreases, resulting in a weakening of the rock-breaking ability per unit speed. In order to maintain the same drilling speed, the drill bit to be assessed needs to increase its speed to compensate for the loss of cutting efficiency, which manifests as an abnormal increase or fluctuation in speed. By real-time monitoring and analysis of speed data, a multi-dimensional assessment model can be constructed by combining parameters such as torque, further improving the reliability of the judgment of the cutting edge wear state of the drill bit to be assessed. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a drill bit cutting edge wear condition assessment device according to an optional embodiment of this application;

[0034] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0035] Figure 3 This is a schematic diagram of the structure of the shaft and the jacket in an optional embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the structure of a fixing component according to an optional embodiment of this application;

[0037] Figure 5 This is a schematic diagram of the structure of a speed sensor and a speed measuring gear according to an optional embodiment of this application.

[0038] The reference numerals in the attached figures are as follows:

[0039] 1. Main body of the device; 11. Top plate; 12. Bottom plate; 121. Boss; 13. Support plate; 2. Drive assembly; 21. Fixing frame; 211. Guide groove; 22. Rotary drive unit; 221. Rotating shaft; 23. Lifting drive unit; 24. Guide block; 25. Jacket; 26. Rotating shaft; 27. Transmission rod; 28. Transmission block; 3. Fixing assembly; 31. Placement platform; 311. Rock trough; 32. Fixing plate; 33. Screw; 34. Rubber pad; 4. Position sensor; 5. Torque sensor; 6. Speed ​​sensor; 7. Speed ​​measuring gear; 8. Controller; 81. Display screen; 9. Drill bit to be evaluated; 10. Rock sample. Detailed Implementation

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0044] See also Figures 1 to 5 As shown, this application provides a drill bit cutting edge wear condition assessment device, including a device body 1, a position sensor 4, a torque sensor 5, and a speed sensor 6. The device body 1 includes a top plate 11 and a bottom plate 12. A drive assembly 2 is provided on the top plate 11. The drive assembly 2 is used to connect to the drill bit 9 to be assessed and can drive the drill bit 9 to perform lifting and rotating movements. A fixing assembly 3 is provided on the bottom plate 12. The fixing assembly 3 is used to fix the rock sample 10. One end of the position sensor 4 is fixedly installed, and the other end is connected to the drill bit 9 to be assessed, for real-time monitoring of the axial position of the drill bit 9 to be assessed. The torque sensor 5 is installed on the rotating shaft 26221 of the drill bit 9 to be assessed, for real-time monitoring of the torque value of the rotating shaft 26221 during the drilling process. A speed measuring gear 7 is sleeved on the rotating shaft 26221. The speed sensor 6 is fixed relative to the speed measuring gear 7 to real-time monitor the tooth frequency signal of the speed measuring gear 7 to obtain the speed parameters of the drill bit 9 to be assessed.

[0045] The drill bit cutting edge wear assessment device provided in this embodiment achieves real-time tracking of the axial displacement of the drill bit 9 during drilling by fixing one end of the position sensor 4 and connecting the other end to the drill bit 9 to be assessed. By analyzing the trend of axial position changes, such as feed rate and vibration amplitude, the degree of wear of the cutting edge can be indirectly determined, providing dynamic displacement data support for wear condition assessment. Specifically, when the cutting edge of the drill bit 9 to be assessed wears, its cutting efficiency decreases, resulting in a decrease in the drilling speed of the drill bit 9 to be assessed, such as a shortening of the axial feed distance in the same time period or an increase in abnormal pauses during the feed process. By capturing such displacement anomalies, the position sensor 4 can help identify the development process of the wear condition.

[0046] The drill bit cutting edge wear assessment device provided in this embodiment can monitor the torque changes of the drill bit 9 during drilling in real time by installing a torque sensor 5 on the shaft 26221 of the drill bit 9 to be assessed. Specifically, when the cutting edge of the drill bit 9 to be assessed wears, its cutting efficiency decreases, resulting in an increase in the frictional resistance between the cutting edge and the rock sample. This increase in frictional resistance is directly reflected in the increase of the torque value of the shaft 26221. Through real-time quantitative analysis of the torque value, the wear stage of the cutting edge can be accurately identified, such as initial wear, moderate wear, or severe wear.

[0047] The drill bit cutting edge wear assessment device provided in this embodiment uses a speed measuring gear 7 mounted on the shaft 26221 of the drill bit 9 to be assessed, and a speed sensor 6 fixed relative to the speed measuring gear 7. This allows for real-time monitoring of the gear frequency signal to calculate the speed parameters of the drill bit 9. Specifically, when the cutting edge of the drill bit 9 wears, its cutting efficiency decreases, resulting in a weakened rock-breaking ability per unit speed. To maintain the same drilling speed, the drill bit 9 needs to increase its speed to compensate for the loss of cutting efficiency, which manifests as an abnormal increase or fluctuation in speed. By real-time monitoring and analysis of the speed data, a multi-dimensional assessment model can be constructed by combining parameters such as torque, further improving the reliability of the wear assessment of the cutting edge of the drill bit 9.

[0048] The main body 1 of the device can be a frame structure used to construct the testing platform. Here, the top plate 11 of the main body 1 supports the drive assembly 2, and the bottom plate 12 fixes the rock sample 10, which can ensure the stability of the mechanical system during the testing process.

[0049] The drive assembly 2 is connected to the drill bit 9 to be evaluated. The drive assembly 2 can drive the drill bit 9 to perform lifting and rotating movements to simulate different needs under real drilling conditions, such as drilling speed and rotation speed parameters adapted to different formation characteristics. Here, the lifting movement of the drill bit 9 is for axial feed, and the rotating movement of the drill bit 9 is for rock breaking.

[0050] The fixing component 3 is used to fix the rock sample 10 to prevent the rock sample 10 from shifting or shaking during the test, thereby ensuring that the contact conditions between the drill bit 9 to be evaluated and the rock sample 10 are unique, that is, only affected by the wear of the cutting edge, eliminating environmental interference factors and improving the reliability of the data.

[0051] The position sensor 4 can be a string ruler. One end of the string ruler can be fixedly mounted on the frame structure of the main body 1 or the fixed part of the drive assembly 2, while the other end is connected to the drill bit 9 to be evaluated via a flexible string. When the drill bit 9 to be evaluated performs axial feed, i.e., lifting and lowering motion, the flexible string extends and retracts synchronously with the drill bit 9, causing the encoder or potentiometer inside the string ruler to generate a displacement signal, thereby acquiring the axial position data of the drill bit 9 to be evaluated in real time, such as feed depth and displacement rate.

[0052] The torque sensor 5 is directly mounted on the shaft 26221 of the drill bit 9 to be evaluated, and rotates synchronously with the drill bit 9 to monitor the torque borne by the shaft 26221 in real time. Here, the torque sensor 5 is coaxially mounted with the shaft 26221, and the detection end of the torque sensor 5 is in close contact with the outer circumferential surface of the shaft 26221.

[0053] The speed sensor 6 monitors the drill bit speed in conjunction with the speed measuring gear 7. Here, the speed measuring gear 7 is mounted on the shaft 26221 of the drill bit 9 to be evaluated and rotates with it. The speed sensor 6 is installed beside the speed measuring gear 7 and is fixed relative to the lifting part of the drive assembly 2; that is, the speed sensor 6 rises and falls synchronously with the drill bit 9 to be evaluated, but maintains a constant radial distance from the speed measuring gear 7. When the drill bit 9 to be evaluated rotates, the teeth of the speed measuring gear 7 periodically pass through the detection end of the speed sensor 6, causing a change in the magnetic field inside the speed sensor 6. According to the principle of electromagnetic induction, this change in magnetic field generates an induced electromotive force proportional to the rotational speed in the coil of the speed sensor 6. By collecting and analyzing the frequency or amplitude of this electromotive force signal, the rotational speed parameters of the shaft 26221, such as the rotational speed of the drill bit 9 to be evaluated, can be calculated in real time.

[0054] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figures 1 to 3As shown, the drive assembly 2 includes a fixed frame 21, a rotary drive unit 22, and a lifting drive unit 23. The fixed frame 21 has a guide groove 211 that extends along the axial direction of the drill bit 9 to be evaluated. The rotary drive unit 22 is slidably connected to the guide groove 211 via a guide block 24. One end of the rotating shaft 26221 is connected to the output shaft of the rotary drive unit 22, and the other end is connected to the drill bit 9 to be evaluated via a clamp 25. The rotary drive unit 22 is used to drive the rotating shaft 26221 and the drill bit 9 to be evaluated to rotate. The lifting drive unit 23 is mounted on the fixed frame 21. The output end of the lifting drive unit 23 is connected to the rotary drive unit 22 via a transmission connection. The lifting drive unit 23 is used to drive the rotary drive unit 22 to move up and down along the guide groove 211 on the fixed frame 21, thereby driving the drill bit 9 to achieve axial feed motion.

[0055] In this embodiment, the rotary drive unit 22 independently drives the rotating shaft 26221 and the drill bit 9 to be evaluated to rotate, providing the cutting motion required for rock breaking; the lifting drive unit 23 independently controls the rotary drive unit 22 and the drill bit 9 to be evaluated to rise and fall along the guide groove 211, realizing axial feed motion. Thus, the two motions can be independently adjusted and coordinated to accurately simulate the combined working conditions of rotary rock breaking and axial propulsion in real drilling.

[0056] The fixed frame 21 is the fixed part of the drive assembly 2. It can serve as a mechanical support frame for the drive assembly 2, support the rotary drive unit 22 and the lifting drive unit 23, and provide guiding constraints for the movement.

[0057] Among them, the guide groove 211 can be a linear guide rail extending along the axial direction of the drill bit 9 to be evaluated, that is, the vertical direction, to limit the movement trajectory of the rotary drive unit 22 and ensure that the drill bit 9 to be evaluated can only move up and down along the axial direction.

[0058] The rotary drive unit 22 can be a servo motor, used to output controllable speed and torque. A guide block 24 is provided on the outer wall of the rotary drive unit 22, which slides into a guide groove 211 on the fixed frame 21, allowing the rotary drive unit 22 to move axially. The output shaft of the rotary drive unit 22 can be connected to a rotating shaft 26221 via a coupling, and the rotating shaft 26221 is connected to the drill bit 9 to be evaluated via a collet 25, forming a complete rotary power chain.

[0059] The lifting drive unit 23 is located on the side of the rotary drive unit 22 opposite to the drill bit 9 to be evaluated. Here, the lifting drive unit 23 is located above the rotary drive unit 22 and is fixedly mounted on the top of the mounting bracket 21.

[0060] It is understandable that the lifting drive unit 23 can employ different structures to achieve linear drive functionality. In some specific examples, the lifting drive unit 23 is a hydraulic cylinder, with its cylinder body fixed to the top of the fixed frame 21, and the piston rod directly connected to the rotary drive unit 22 as the output end. The hydraulic system controls the inflow and outflow of hydraulic fluid, pushing the piston rod to extend and retract, directly providing linear drive force to drive the rotary drive unit 22 to rise and fall along the guide groove 211. This solution features a compact structure and high output force, suitable for scenarios requiring rapid response or high load. In other specific examples, the lifting drive unit 23 is a servo motor, with its output end connected to the rotary drive unit 22 via a transmission assembly. The transmission assembly is used to convert rotary motion into linear motion. Specifically, when the lifting drive unit 23 is a servo motor, its output end is connected to the rotary drive unit 22 via a transmission assembly. See also... Figure 2 As shown, the transmission assembly includes a transmission rod 27 and a transmission block 28. One end of the transmission rod 27 is connected to the output end of the servo motor, and the other end extends through the top of the fixed frame 21 toward the rotary drive unit 22. The transmission block 28 is sleeved on the transmission rod 27 and threadedly engaged with it. The transmission block 28 is also connected to the rotary drive unit 22. When the servo motor drives the transmission rod 27 to rotate, the transmission block 28 moves axially along the transmission rod 27, thereby driving the rotary drive unit 22 to rise and fall along the guide groove 211. Here, the transmission rod 27 can be a ball screw, with one end connected to the output shaft of the servo motor and rotating synchronously with the motor. The other end extends through the top of the fixed frame 21 toward the rotary drive unit 22 to engage with the transmission block 28. The transmission block 28 has a thread inside that matches the transmission rod 27, is sleeved on the outside of the transmission rod 27 and threadedly engaged with it, and is also connected to the rotary drive unit 22. When the servo motor drives the transmission rod 27 to rotate, due to the constraint of the guide block 24 and the guide groove 211, the transmission block 28 moves linearly along the axis of the transmission rod 27. The linear movement of the transmission block 28 drives the rotary drive unit 22 connected to it to move up and down synchronously along the guide groove 211, thereby realizing the axial feed control of the drill bit.

[0061] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the main body 1 of the device also includes a support plate 13, one end of which is connected to the frame of the main body 1 of the device, and the other end is connected to the fixed frame 21.

[0062] In this embodiment, by setting the support plate 13, the axial force, radial force and bending moment borne by the fixing frame 21 during operation can be dispersed, reducing the vibration or deformation of the fixing frame 21 and avoiding drill bit positioning deviation or measurement error caused by structural shaking.

[0063] The frame of the main body 1 can be a rigid frame between the top plate 11 and the bottom plate 12.

[0064] The fixed frame 21 is the mounting carrier of the drive assembly 2, and it has a guide groove 211 to constrain the lifting path of the rotary drive unit 22.

[0065] Among them, the support plate 13 is a transition component connecting the frame and the fixed frame 21. It can be a metal plate, such as a steel plate or an aluminum alloy plate, and is fixedly connected to the two by bolts or welding.

[0066] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 4 As shown, the fixing component 3 includes a placement platform 31, which is detachably mounted on the base plate 12. A rock trough 311 is provided on the placement platform 31 for accommodating and fixing the rock sample 10.

[0067] In this embodiment, different types of rock samples 10 can be quickly switched by changing the placement stage 31, thereby improving experimental efficiency.

[0068] Among them, the base plate 12 is the bottom support structure of the main body 1 of the device, and can be a rigid flat plate.

[0069] The placement platform 31 can be a block structure made of metal or engineering plastic, and must have sufficient rigidity to withstand drilling loads. Here, the placement platform 31 can be detachably connected to the base plate 12 via bolts, locating pins, or dovetail grooves for easy and quick replacement.

[0070] In order to accommodate irregular rock samples 10, the rock trough 311 can be designed as a cylindrical, rectangular or irregular shaped trough, etc., and this application does not limit it.

[0071] In the above embodiments, see Figure 1 and Figure 4 As shown, the fixing component 3 also includes two fixing plates 32 arranged opposite to each other. The upper surface of the base plate 12 is provided with a boss 121. The two fixing plates 32 are respectively arranged on opposite sides of the placement platform 31 near the boss 121. Each fixing plate 32 is provided with a through hole for threading a screw 33 through the hole. The screw 33 is threadedly connected to the fixing plate 32. A rubber pad 34 is provided on the end of the screw 33 facing the boss 121.

[0072] In this embodiment, the boss 121 serves as a fixed reference on the base plate 12, providing a clear installation position for the placement stage 31 and ensuring the positional accuracy of the placement stage 31 on the base plate 12. In practical applications, the fixing plate 32 clamps the boss 121, which can firmly lock the placement stage 31 onto the base plate 12, preventing the placement stage 31 from shifting or loosening due to vibration, and ensuring the stability of the experimental process.

[0073] The boss 121 is a raised structure on the upper surface of the base plate 12. It is roughly rectangular and is integrally formed with the base plate 12 or fixed by welding. Here, the width of the boss 121 is slightly smaller than the width of the placement platform 31, forming a positioning reference.

[0074] The fixing plate 32 can be a metal plate, and is installed in pairs on the side of the placement platform 31 near the boss 121. Here, the fixing plate 32 can be fixed to the placement platform 31 by bolts or welding.

[0075] Two fixing plates 32 are arranged opposite each other along the width direction of the boss 121, and threaded through holes are opened on the plate surface to pass through the fixing plates 32.

[0076] The external thread of the screw 33 matches the through hole of the fixing plate 32. One end of the screw 33 is machined with a hexagonal head for screwing the screw 33, and the other end is connected to a rubber pad 34 for clamping the boss 121.

[0077] The rubber pads 34 can be made of nitrile rubber or silicone rubber. Here, the two rubber pads 34 are arranged in parallel and are both parallel to the sidewalls of the boss 121. Specifically, when the two fixing plates 32 clamp the boss 121 using screws 33, the rubber pads 34 at the ends of the screws 33 abut against the opposite sidewalls of the boss 121. The geometric direction of their contact surfaces is completely consistent with the plane normal of the sidewalls of the boss 121, ensuring that the clamping force is uniformly and perpendicularly applied to the boss 121. This avoids tilting of the placement platform 31 or uneven force due to angular deviation, allowing the rubber pads 34 to form surface contact with the sidewalls of the boss 121, maximizing the contact area, thereby improving clamping stability and positioning accuracy.

[0078] In addition, the rubber pad 34 can also be configured as follows:

[0079] The thickness of the rubber pad 34 decreases gradually along the direction from the boss 121 toward the placement platform 31.

[0080] Here, the end of the rubber pad 34 that contacts the boss 121 has a larger thickness, while the end that extends toward the placement platform 31 has a gradually decreasing thickness, forming a gradient structure that is thinner at the top and thicker at the bottom, similar to a wedge structure, to enhance the clamping force.

[0081] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 5 As shown, the distance between the detection surface of the speed sensor 6 and the tip circle of the speed measuring gear 7 is 1mm to 3mm, and the detection surface of the speed sensor 6 is parallel to the center line of the speed measuring gear 7.

[0082] It is understandable that when the distance between the detection surface of the speed sensor 6 and the tip circle of the speed measuring gear 7 is less than 1mm, the mechanical vibration of the speed measuring gear 7 during rotation may cause the speed sensor 6 to come into direct contact with the speed measuring gear 7, resulting in wear or even damage and affecting its lifespan. When the distance between the detection surface of the speed sensor 6 and the tip circle of the speed measuring gear 7 is greater than 3mm, the magnetic field strength or signal strength attenuates significantly, which may lead to signal distortion, missed detection, or misjudgment. In this application, the distance between the detection surface of the speed sensor 6 and the tip circle of the speed measuring gear 7 is 1mm to 3mm, which not only maintains sufficient safety clearance to avoid rigid collisions, but also ensures that the signal strength meets the effective detection range of the sensor.

[0083] Furthermore, the detection surface of the speed sensor 6 is parallel to the center line of the speed measuring gear 7, which means that the radial distance between the detection surface of the speed sensor 6 and the speed measuring gear 7 remains constant throughout the entire circumference. This ensures that the distance between each tooth tip and the detection surface is consistent, and the signal waveform is symmetrical, thereby improving the accuracy of speed measurement.

[0084] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the drill bit cutting edge wear condition assessment device also includes a controller 8, which is located on one side of the device body 1. The controller 8 is electrically connected to the position sensor 4, torque sensor 5 and speed sensor 6 respectively.

[0085] In this embodiment, the controller 8 integrates a data storage module capable of recording historical curves of torque, speed, and displacement data. Simultaneously, the controller 8 also integrates an analysis module capable of constructing a wear characteristic database based on the accumulated historical curves. In practical applications, the analysis module compares real-time monitoring data with the wear characteristics in the database to achieve quantitative assessment and qualitative judgment of the wear state of the cutting edge of the drill bit 9 under evaluation, providing data support for tool change timing decisions and process parameter optimization.

[0086] In the above embodiments, see Figure 1 As shown, the controller 8 is equipped with a display screen 81, which is a touch screen.

[0087] In this embodiment, the display screen 81 can dynamically display curves or values ​​of monitoring parameters such as torque, speed, and displacement in real time, which makes it easy for operators to quickly grasp the wear characteristics of the cutting edge of the drill bit 9 to be evaluated.

[0088] Furthermore, to reduce information switching costs, the display screen 81 can display historical data curves, wear assessment results such as the current wear level, remaining life prediction, and alarm information such as a red highlight when parameters exceed the threshold.

[0089] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0090] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A device for assessing the wear condition of drill bit cutting edges, characterized in that, include: The device body includes a top plate and a bottom plate. A drive assembly is provided on the top plate. The drive assembly is used to connect to the drill bit to be evaluated and can drive the drill bit to be evaluated to perform lifting and rotating movements. A fixing assembly is provided on the bottom plate. The fixing assembly is used to fix the rock sample. A position sensor, one end of which is fixedly installed and the other end is connected to the drill bit to be evaluated, is used to monitor the axial position of the drill bit to be evaluated in real time; A torque sensor is installed on the shaft of the drill bit to be evaluated to monitor the torque value of the shaft in real time during the drilling process. A speed sensor is provided, and a speed measuring gear is sleeved on the rotating shaft. The speed sensor is fixed relative to the speed measuring gear and is used to monitor the tooth frequency signal of the speed measuring gear in real time in order to obtain the speed parameters of the drill bit to be evaluated.

2. The drill bit cutting edge wear condition assessment device according to claim 1, characterized in that, The driving component includes: A mounting bracket is provided with a guide groove, which extends along the axial direction of the drill bit to be evaluated; A rotary drive unit is slidably connected to the guide groove via a guide block. One end of the rotating shaft is connected to the output shaft of the rotary drive unit, and the other end is connected to the drill bit to be evaluated via a clamp. The rotary drive unit is used to drive the rotating shaft and the drill bit to be evaluated to rotate. A lifting drive unit is provided, which is mounted on the fixed frame. The output end of the lifting drive unit is connected to the rotary drive unit. The lifting drive unit is used to drive the rotary drive unit to move up and down along the guide groove on the fixed frame, thereby driving the drill bit to be evaluated to achieve axial feed movement.

3. The drill bit cutting edge wear condition assessment device according to claim 2, characterized in that, The driving component also includes: A transmission rod, one end of which is connected to the output end of the lifting drive unit; A transmission block is sleeved on the transmission rod and threadedly engaged with it. The transmission block is also connected to the rotary drive unit. When the lifting drive unit drives the transmission rod to rotate, the transmission block moves along the axial direction of the transmission rod, thereby driving the rotary drive unit to rise and fall along the guide groove.

4. The drill bit cutting edge wear condition assessment device according to claim 2, characterized in that, The main body of the device also includes: A support plate, one end of which is connected to the frame of the main body of the device, and the other end of which is connected to the fixing frame.

5. The drill bit cutting edge wear condition assessment device according to claim 1, characterized in that, The fixing component includes: A placement platform is detachably mounted on the base plate, and a rock trough is provided on the placement platform for accommodating and fixing the rock sample.

6. The drill bit cutting edge wear condition assessment device according to claim 5, characterized in that, The fixing component also includes: Two fixing plates are arranged opposite each other. The upper surface of the base plate is provided with a boss. The two fixing plates are respectively arranged on opposite sides of the placement platform near the boss. Each fixing plate is provided with a through hole for inserting a screw. The screw is threaded to the fixing plate. A rubber pad is provided on the end of the screw facing the boss.

7. The drill bit cutting edge wear condition assessment device according to claim 6, characterized in that, The thickness of the rubber pad decreases gradually along the direction from the boss toward the placement platform.

8. The drill bit cutting edge wear condition assessment device according to claim 1, characterized in that, The distance between the detection surface of the speed sensor and the tip circle of the speed measuring gear is 1mm to 3mm, and the detection surface of the speed sensor is parallel to the center line of the speed measuring gear.

9. The drill bit cutting edge wear condition assessment device according to claim 1, characterized in that, Also includes: The controller is located on one side of the main body of the device and is electrically connected to the position sensor, the torque sensor and the speed sensor respectively.

10. The drill bit cutting edge wear condition assessment device according to claim 9, characterized in that, The controller is equipped with a display screen, which is a touch screen.

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