Device and method for offline detection of tool setting gauge

Abstract

The invention relates to the technical field of machining, and particularly discloses a device and method for offline detection of a tool setting gauge, and the device comprises a mounting platform, one side of the top of the mounting platform is fixedly connected with an erecting plate, the top of the surface of the erecting plate is fixedly connected with a mounting frame, and the inner wall of the mounting frame is fixedly connected with a servo motor. A driving rod is mounted at the output end of the servo motor, a lead screw is fixedly connected to the bottom end of the driving rod, the bottom end of the lead screw is rotationally connected to the top of the mounting platform, and a threaded sleeve is in threaded connection with the surface of the lead screw; the grating ruler is adopted as a position feedback encoder, the high-precision analog quantity module is combined, accurate measurement and feedback of the position of the tool simulator are achieved, meanwhile, due to automatic control of the PLC control unit and quick response of the servo motor, the detection process is more efficient, the detection precision and efficiency of the tool setting gauge can be remarkably improved, and the detection precision and efficiency of the tool setting gauge are improved. Therefore, machining precision and stability of the numerical control machine tool are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a device and method for offline detection of a tool setting instrument. Background Art

[0002] With the rapid development of modern manufacturing industry, CNC machine tools have become an important part of the field of mechanical processing. As a key component of CNC machine tools, the accuracy and stability of tool setting instruments directly affect the quality and production efficiency of machined parts. Traditionally, the detection of tool setting instruments mainly relies on manual operation, and its performance is evaluated through repeated trial cutting and measurement. This method is not only time-consuming and labor-intensive, but also easily affected by human factors, resulting in low accuracy and reliability of the detection results. In order to overcome this defect, in recent years, domestic and foreign scholars and engineers have begun to explore automated and intelligent tool setting instrument detection technology.

[0003] Although the existing detection technology has improved the detection accuracy and efficiency of tool setting instruments to a certain extent, in terms of detection accuracy, the existing detection technology is often difficult to achieve the micron-level or even nano-level accuracy requirements, which is a defect that cannot be ignored in the field of high-precision processing. In terms of detection efficiency, although some automated detection technologies can significantly improve the detection speed, the use effect of the device is poor, so staff need to improve it. Summary of the invention

[0004] The object of the present invention is to provide a device and method for offline detection of a tool setting instrument to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for offline detection of a tool setting instrument, comprising:

[0007] Installation platform;

[0008] A mounting plate is fixedly connected to one side of the top of the mounting platform, and a mounting frame is fixedly connected to the top of the mounting plate surface;

[0009] A servo motor is fixedly connected to the inner wall of the mounting frame, a driving rod is installed at the output end of the servo motor, a lead screw is fixedly connected to the bottom end of the driving rod, and the bottom end of the lead screw is rotatably connected to the top of the mounting platform, a threaded sleeve is threadedly connected to the surface of the lead screw, a fixed plate is fixedly connected to the surface of the threaded sleeve, a tool simulator is fixedly connected to the surface of the fixed plate, a grating ruler is fixedly connected to one side of the top of the mounting platform close to the mounting plate, an origin sensor is fixedly connected to the inner top wall of the grating ruler, and limit sensors are fixedly connected to the upper and lower sides of the inner wall of the grating ruler.

[0010] Preferably, a lap plate is fixedly connected to the top of the mounting platform, a placement plate is inserted into the top of the lap plate, a pressure sensor is fixedly connected to the bottom of the placement plate, and the bottom of the pressure sensor is fixedly connected to the inner bottom wall of the lap plate.

[0011] Preferably, three fixed sleeves are fixedly connected to the surface of the top of the mounting platform close to the lap plate, the inner wall of the fixed sleeve is fixedly connected to an electric telescopic rod, the front end of the electric telescopic rod is fixedly connected to a connecting plate, the surface of the connecting plate is fixedly connected to an extrusion frame, and the surface of the extrusion frame is inserted into the inner wall of the fixed sleeve.

[0012] Preferably, sliding blocks are fixedly connected to both sides of the back side of the fixed plate, positioning rails are fixedly connected to both sides of the surface of the mounting plate, and the surfaces of the sliding blocks are slidably connected to the inner walls of the positioning rails.

[0013] Preferably, a control switch is fixedly connected to the top of the mounting platform, an HMI panel unit is fixedly connected to the side of the top of the mounting platform close to the control switch, one side of the HMI panel unit is electrically connected to a PLC control unit, one side of the PLC control unit is electrically connected to a high-precision analog module, one side of the high-precision analog module is electrically connected to a printer, and the bottoms of the HMI panel unit, the PLC control unit, the high-precision analog module and the printer are all fixedly connected to the top of the mounting platform.

[0014] A method for offline detection of a tool setting instrument comprises the following steps:

[0015] S1. Associate the electronic control platform with the tool setting instrument platform, install the tool simulator, and place the tool setting instrument to be tested on the testing platform and fix it accurately through the positioning mechanism;

[0016] S2, start the electronic control platform, set the detection parameters through the HMI panel unit, and establish the reference coordinate point for the first time. The detection parameters include the measurement range, the measurement accuracy error range, the pressure range requirement, the number of repeated tool setting, the tool setting feed speed and the rapid positioning speed;

[0017] S3, start the detection process through the HMI panel unit control, after receiving the command, the PLC control unit controls the servo driver to drive the servo motor, driving the tool simulator to perform tool setting action, and at the same time, the grating ruler feeds back the position data of the tool simulator in real time, and the pressure sensor collects the pressure data in the tool setting process in real time;

[0018] S4, the high-precision analog module extracts the analog signal of the pressure sensor and converts it into a digital signal and transmits it to the PLC control unit for processing and analysis. The PLC reads the grating ruler position data inside the driver. In order to quantify the performance of the tool setting instrument, a comprehensive performance evaluation index L is introduced, and its calculation formula is as follows:

[0019]

[0020] Where: N is the number of repeated tool setting (N ≥ 100), P i is the pressure data during the i-th tool setting, P max A is the maximum pressure value that the tool setting instrument can withstand. i is the position accuracy data of the i-th tool setting (obtained through grating ruler feedback), A ref is the reference position accuracy value, which is used for normalization processing. λ is the temperature influence coefficient, which indicates the influence of temperature change on position accuracy. i is the ambient temperature during the i-th tool setting;

[0021] The pressure, position accuracy and temperature effects during tool setting are comprehensively considered. By calculating the comprehensive performance evaluation index of each tool setting, the performance of the tool setting instrument can be evaluated more accurately. The PLC control unit judges the data according to the preset standard (i.e. the threshold of the comprehensive performance evaluation index) to determine whether the performance of the tool setting instrument meets the requirements.

[0022] S5. After the detection is completed, the PLC control unit transmits the detection results (including the comprehensive performance evaluation index L) to the HMI panel unit for display, and controls the printer to print the detection report through the HMI panel unit. The detection report includes various parameters of the tool setting instrument, detection results and adjustment suggestions.

[0023] Preferably, the tool setting is repeated at least 100 times to ensure the accuracy and reliability of the detection result.

[0024] Preferably, during the detection process, the grating ruler is used as an encoder for position feedback to form a fully closed-loop system, which is used to reduce the influence of thermal elongation of the screw caused by repeated tool setting, ensure the position accuracy of the tool setting, and at the same time detect the pressure during tool setting through a pressure sensor.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) By using a grating ruler as an encoder for position feedback and combining it with a high-precision analog module, accurate measurement and feedback of the tool simulator position is achieved. At the same time, the automated control of the PLC control unit and the rapid response of the servo motor make the detection process more efficient and can significantly improve the detection accuracy and efficiency of the tool setting instrument, thereby ensuring the processing accuracy and stability of the CNC machine tool.

[0027] (2) By considering the position accuracy of the tool simulator and the impact of various factors such as pressure and temperature on the performance of the tool setting instrument, the overall performance of the tool setting instrument can be comprehensively evaluated by calculating the comprehensive performance evaluation index, including its stability, accuracy and durability, which helps to timely discover potential problems of the tool setting instrument and provide a favorable basis for subsequent adjustments or repairs.

[0028] (3) The present invention adopts a high-precision measurement system and a tool simulation device, which can accurately reflect the performance of the tool setting instrument in actual use and improve the detection accuracy. It can be applicable to the detection of tool setting instruments of different models and specifications, has strong versatility, a control system, and is easy to operate. Users can easily complete the detection process and can generate a detailed detection report to provide users with performance evaluation and adjustment suggestions for the tool setting instrument, which helps to improve the use effect of the tool setting instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 One of the three-dimensional diagrams of the present invention;

[0030] Figure 2 This is the second stereogram of the present invention;

[0031] Figure 3 A three-dimensional diagram of the lead screw of the present invention;

[0032] Figure 4 It is a three-dimensional diagram of the electric telescopic rod of the present invention;

[0033] Figure 5 is a three-dimensional diagram of the pressure sensor of the present invention;

[0034] Figure 6 A three-dimensional diagram of the grating ruler of the present invention;

[0035] In the figure: 1. Installation platform; 2. Mounting plate; 3. Installation frame; 4. Servo motor; 5. Drive rod; 6. Lead screw; 7. Threaded sleeve; 8. Fixed plate; 9. Tool simulator; 10. Grating ruler; 11. Overlap plate; 12. Placement plate; 13. Pressure sensor; 14. Fixed sleeve frame; 15. Electric telescopic rod; 16. Connecting plate; 17. Extrusion frame; 18. Sliding block; 19. Positioning slide rail; 20. Control switch; 21. HMI panel unit; 22. PLC control unit; 23. High-precision analog module; 24. Printer; 25. Origin sensor; 26. Limit sensor. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] See also Figures 1 to 6 As shown, a device and method for offline detection of a tool setting instrument include:

[0039] Installation platform 1;

[0040] A mounting plate 2 is fixedly connected to one side of the top of the mounting platform 1, and a mounting frame 3 is fixedly connected to the top of the surface of the mounting plate 2;

[0041] A servo motor 4 is fixedly connected to the inner wall of the mounting frame 3, a driving rod 5 is installed at the output end of the servo motor 4, a lead screw 6 is fixedly connected to the bottom end of the driving rod 5, and the bottom end of the lead screw 6 is rotatably connected to the top of the mounting platform 1, a threaded sleeve 7 is threadedly connected to the surface of the lead screw 6, a fixed plate 8 is fixedly connected to the surface of the threaded sleeve 7, a tool simulator 9 is fixedly connected to the surface of the fixed plate 8, a grating ruler 10 is fixedly connected to one side of the top of the mounting platform 1 close to the side of the mounting plate 2, an origin sensor 25 is fixedly connected to the inner top wall of the grating ruler 10, limit sensors 26 are fixedly connected to the upper and lower sides of the inner wall of the grating ruler 10, sliding blocks 18 are fixedly connected to both sides of the back side of the fixed plate 8, positioning rails 19 are fixedly connected to both sides of the surface of the mounting plate 2, and the surface of the sliding block 18 is slidably connected to the inner wall of the positioning rails 19.

[0042] When in use, the mounting platform 1 serves as the basic supporting structure of the entire device, carrying all other components. The mounting plate 2 is fixedly connected to one side of the mounting platform 1, providing a stable mounting position for the mounting frame 3. The servo motor 4 fixedly connected inside the mounting frame 3 is the core of the entire drive system. When the servo motor 4 is powered on, the servo motor 4 drives the driving rod 5 to rotate. The bottom end of the driving rod 5 is fixedly connected to the lead screw 6, so that the lead screw 6 can rotate under the drive of the servo motor 4. The surface of the lead screw 6 is threadedly connected to the threaded sleeve 7. Therefore, when the lead screw 6 rotates, the threaded sleeve 7 will move in the axial direction of the lead screw 6, and the fixed plate 8 fixedly connected to the surface of the threaded sleeve 7 will move accordingly. The tool simulator 9 installed on the fixed plate 8 simulates the tool in actual processing. Through the movement of the tool simulator 9, the motion trajectory of the tool during the processing process can be simulated. In order to ensure the stability of the tool simulator 9 during movement, sliding plates are fixedly connected on both sides of the back side of the fixed plate 8. The movable blocks 18 slide in the positioning rails 19 on both sides of the surface of the mounting plate 2, thereby realizing the precise guidance and limitation of the moving trajectory of the tool simulator 9, and a grating ruler 10 is also arranged on the mounting platform 1, which is used to accurately measure the moving distance of the tool simulator 9 to ensure the accuracy of the detection. The output signal of the grating ruler 10 can be received and processed by the subsequent control system, which not only improves the accuracy and efficiency of the detection, but also reduces the difficulty and error rate of manual operation. The origin sensor 25 plays an important role in marking the starting position in the grating ruler 10. When the grating ruler moves to the origin position, the origin sensor will trigger a corresponding signal. This signal is usually used to calibrate or reset the displacement measurement of the system. The limit sensor 26 is used to detect the moving range of the grating ruler to prevent it from exceeding the predetermined stroke. When the grating ruler approaches or reaches its physical limit, the limit sensor will trigger an alarm or protection mechanism to prevent damage or accidents caused by excessive movement.

[0043] Embodiment 2:

[0044] See also Figures 1 to 6 As shown, the top of the mounting platform 1 is fixedly connected with a lap plate 11, the top of the lap plate 11 is plugged with a placement plate 12, the bottom of the placement plate 12 is fixedly connected with a pressure sensor 13, and the bottom of the pressure sensor 13 is fixedly connected to the inner bottom wall of the lap plate 11, the top of the mounting platform 1 is fixedly connected with three fixed sleeves 14 on the surface close to the lap plate 11, the inner wall of the fixed sleeve 14 is fixedly connected with an electric telescopic rod 15, the front end of the electric telescopic rod 15 is fixedly connected with a connecting plate 16, the surface of the connecting plate 16 is fixedly connected with an extrusion frame 17, and the surface of the extrusion frame 17 is plugged with the inner wall of the fixed sleeve 14.

[0045] When in use, the lap plate 11 provides a stable supporting platform for the placement plate 12, so that the placement plate 12 can be firmly installed on the installation platform 1, thereby ensuring that the workpiece placed on the placement plate 12 will not shake or move. The placement plate 12 directly carries the workpiece to be tested, and its surface is flat and designed with suitable dimensions to facilitate accurate positioning of the workpiece. The pressure sensor 13 is arranged between the bottom of the placement plate 12 and the inner bottom wall of the lap plate 11. When the workpiece is placed on the placement plate 12, the pressure sensor 13 can sense and measure the pressure generated by the workpiece on the placement plate 12 in real time, thereby indirectly reflecting the stability and weight information of the workpiece placement. The fixed sleeve frame 14 is fixedly installed on the top of the installation platform 1, providing an installation basis for the electric telescopic rod 15. The electric telescopic rod 15 is a driving device, and its front end is connected to the extrusion frame 17 through the connecting plate 16. When the workpiece needs to be fixed, the electric telescopic rod 15 is started to push the connecting plate 16 and the extrusion frame 17 forward until the extrusion frame 17 is tightly fitted to the surface of the workpiece. The design of the extrusion frame 17 has a certain elasticity and adaptability, and can adapt to workpieces of different shapes and sizes to ensure that the workpiece is firmly clamped to prevent movement or tilting during the detection process. At the same time, by adjusting the extension and contraction amount of the electric telescopic rod 15, the clamping force of the extrusion frame 17 on the workpiece can be accurately controlled to avoid damage to the workpiece due to over-tight clamping or loosening of the workpiece due to over-loose clamping, which not only improves the stability and reliability of workpiece fixation, but also ensures the accuracy and precision of subsequent detection.

[0046] Embodiment three:

[0047] See also Figures 1 to 6 As shown, a control switch 20 is fixedly connected to the top of the mounting platform 1, an HMI panel unit 21 is fixedly connected to the side of the top of the mounting platform 1 close to the control switch 20, one side of the HMI panel unit 21 is electrically connected to a PLC control unit 22, one side of the PLC control unit 22 is electrically connected to a high-precision analog module 23, one side of the high-precision analog module 23 is electrically connected to a printer 24, and the bottoms of the HMI panel unit 21, the PLC control unit 22, the high-precision analog module 23 and the printer 24 are all fixedly connected to the top of the mounting platform 1.

[0048] When in use, the control switch 20, as the startup and operation core of the entire system, can conveniently control the start and stop of each component to ensure the orderly progress of the detection process. The HMI panel unit 21 provides an intuitive operation interface, through which the operator can input detection parameters, monitor the detection progress and view the detection results, which greatly improves the convenience of operation and the friendliness of human-computer interaction. The PLC control unit 22, as the control center of the entire system, receives instructions from the HMI panel unit 21, and controls the precise movements of actuators such as the servo motor 4 and the electric telescopic rod 15, thereby realizing precise control of the detection process. The high-precision analog module 23 is responsible for converting the analog signals collected by sensors such as the grating ruler 10 and the pressure sensor 13 into digital signals, and transmitting them to the PLC control unit 22 for processing, thereby realizing the precise measurement of key parameters such as the relative position and pressure between the tool simulator 9 and the tool setting instrument to be detected. Finally, the printer 24 can automatically print out the detection report according to the processing results of the PLC control unit 22, which is convenient for the operator to record and analyze the detection results, which not only improves the automation level of the offline detection tool setting instrument, but also ensures the accuracy and reliability of the detection results.

[0049] Embodiment 4:

[0050] See also Figures 1 to 6 As shown, a method for offline detection of a tool setting instrument comprises the following steps:

[0051] S1. Associate the electronic control platform with the tool setting instrument platform, install the tool simulator, and place the tool setting instrument to be tested on the testing platform and fix it accurately through the positioning mechanism;

[0052] S2. Start the electronic control platform, set the detection parameters through the HMI panel unit, and establish the reference coordinate point for the first time. The detection parameters include the measurement range, measurement accuracy error range, pressure range requirements, the number of repeated tool setting, tool setting feed speed and rapid positioning speed;

[0053] S3, start the detection process through the HMI panel unit control, after receiving the command, the PLC control unit controls the servo driver to drive the servo motor, driving the tool simulator to perform tool setting action, and at the same time, the grating ruler feeds back the position data of the tool simulator in real time, and the pressure sensor collects the pressure data in the tool setting process in real time;

[0054] S4, the high-precision analog module extracts the analog signal of the pressure sensor and converts it into a digital signal and transmits it to the PLC control unit for processing and analysis. The PLC reads the grating ruler position data inside the driver. In order to quantify the performance of the tool setting instrument, a comprehensive performance evaluation index L is introduced, and its calculation formula is as follows:

[0055]

[0056] Where: N is the number of repeated tool setting (N ≥ 100), P i is the pressure data during the i-th tool setting, P max A is the maximum pressure value that the tool setting instrument can withstand. i is the position accuracy data of the i-th tool setting (obtained through grating ruler feedback), A ref is the reference position accuracy value, which is used for normalization processing. λ is the temperature influence coefficient, which indicates the influence of temperature change on position accuracy. i is the ambient temperature during the i-th tool setting;

[0057] Pressure factor: Pressure data P i With the maximum pressure value P max The ratio of represents the relative magnitude of pressure, that is, The larger the ratio is, the closer the pressure during tool setting is to the maximum pressure, and the better the performance of the tool setting instrument may be (but it may also exceed the tolerance range and cause damage).

[0058] Position accuracy factor: Position accuracy number A i With reference position accuracy value A ref The ratio of represents the relative size of the position accuracy, that is, The closer this ratio is to 1, the higher the tool positioning accuracy is.

[0059] Temperature influence factor: Temperature changes may cause thermal elongation of the screw, thus affecting the position accuracy of the tool. Therefore, the temperature influence coefficient λ and the ambient temperature T are introduced. i , through the exponential function To represent the effect of temperature on position accuracy. When the temperature increases, the exponential function value decreases, reflecting the negative impact of temperature on performance.

[0060] Comprehensive performance evaluation index: Multiply the above three factors and average the number of repeated tool setting to obtain the comprehensive performance evaluation index L. This index takes into account the effects of pressure, position accuracy and temperature, and can more comprehensively evaluate the performance of the tool setting instrument.

[0061] The pressure, position accuracy and temperature effects during tool setting are comprehensively considered. By calculating the comprehensive performance evaluation index of each tool setting, the performance of the tool setting instrument can be evaluated more accurately. The PLC control unit judges the data according to the preset standard (i.e. the threshold of the comprehensive performance evaluation index) to determine whether the performance of the tool setting instrument meets the requirements.

[0062] S5. After the detection is completed, the PLC control unit transmits the detection results (including the comprehensive performance evaluation index L) to the HMI panel unit for display, and controls the printer to print the detection report through the HMI panel unit. The detection report includes various parameters of the tool setting instrument, detection results and adjustment suggestions.

[0063] Repeat the tool setting at least 100 times to ensure the accuracy and reliability of the test results.

[0064] During the detection process, the grating ruler is used as an encoder for position feedback to form a fully closed-loop system. It is used to reduce the influence of thermal elongation of the lead screw caused by repeated tool setting, ensure the position accuracy of the tool setting, and detect the pressure during tool setting through a pressure sensor.

[0065] Embodiment five:

[0066] See also Figures 1 to 6 As shown, in order to improve production efficiency and product quality, the machinery manufacturing enterprise decided to adopt this offline detection method of tool setting instrument to ensure the stable and accurate performance of the tool setting instrument on its CNC machine tools. The enterprise selected the detection device and method that meet the above description and carried out the following application.

[0067] Link the electronic control platform with the tool setting platform and install the tool simulator.

[0068] Place the tool setting instrument to be tested on the testing platform and fix it accurately through the positioning mechanism.

[0069] Start the electronic control platform and set the detection parameters through the HMI panel unit, including the measurement range, measurement accuracy error range (set to ±0.01mm), pressure range requirement (set to 50-100N), number of repeated tool setting (set to 200 times), tool setting feed speed (set to 5mm / s) and rapid positioning speed (set to 30mm / s).

[0070] The detection process is started through the HMI panel unit control.

[0071] After receiving the instruction, the PLC control unit controls the servo driver to drive the servo motor, which drives the tool simulator to perform tool setting.

[0072] The grating ruler provides real-time feedback of the position data of the tool simulator, forming a fully closed-loop system to ensure the position accuracy of the tool.

[0073] The pressure sensor collects pressure data during the tool setting process in real time to ensure that the pressure is within the set range.

[0074] The high-precision analog module extracts the analog signals from the grating ruler and pressure sensor, converts them into digital signals and transmits them to the PLC control unit.

[0075] The PLC control unit processes and analyzes the data according to the preset standard (i.e., the threshold of the comprehensive performance evaluation index). In this example, the calculation of the comprehensive performance evaluation index L takes into account the influence of pressure, position accuracy and temperature, and the specific formula is as described in the above document.

[0076] The PLC control unit accumulates the comprehensive performance evaluation index L of each tool setting and calculates the average value to evaluate the overall performance of the tool setting instrument.

[0077] Result output and adjustment stage:

[0078] After the detection is completed, the PLC control unit transmits the detection results (including the average value of the comprehensive performance evaluation index L, various parameters and adjustment suggestions) to the HMI panel unit for display.

[0079] The operator views the inspection results through the HMI panel unit and adjusts or repairs the tool setting probe based on the adjustment suggestions.

[0080] At the same time, the printer is controlled by the HMI panel unit to print the test report for subsequent analysis and archiving.

[0081] By adopting this offline detection method of tool setting instrument, the company successfully improved the detection efficiency and accuracy of the tool setting instrument.

[0082] The test results are clear and the operator can quickly adjust or repair the tool setting probe based on the adjustment suggestions in the test report.

[0083] This method also improves the machining accuracy and stability of CNC machine tools, thereby improving product quality and production efficiency.

[0084] This offline detection method of tool setting instrument has achieved remarkable application effect in actual production, which not only improves the detection efficiency and accuracy, but also improves the processing precision and stability of CNC machine tools.

[0085] Working principle: When in use, the servo motor 4 is connected to the power supply, and the servo motor 4 drives the driving rod 5 to rotate. The bottom end of the driving rod 5 is fixedly connected to the lead screw 6, so that the lead screw 6 can rotate under the drive of the servo motor 4. The surface of the lead screw 6 is threadedly connected to the threaded sleeve 7. Therefore, when the lead screw 6 rotates, the threaded sleeve 7 will move in the axial direction of the lead screw 6, and the fixed plate 8 fixedly connected to the surface of the threaded sleeve 7 will move accordingly, and the tool simulator 9 installed on the fixed plate 8 simulates the tool in the actual processing. Through the movement of the tool simulator 9, the movement trajectory of the tool during the processing can be simulated. In order to ensure the stability of the tool simulator 9 during movement, the grating ruler 10 is used to accurately measure the moving distance of the tool simulator 9 to ensure the accuracy of the detection. The output signal of the grating ruler 10 can be received and processed by the subsequent control system. The placement plate 12 is firmly installed on the mounting platform 1, thereby ensuring that the workpiece placed on the placement plate 12 will not shake or move. The placement plate 12 directly carries the workpiece to be detected. Its surface is flat and designed with suitable size to facilitate accurate positioning of the workpiece. The pressure sensor 13 is set at the bottom of the placement plate 12 and the inner bottom of the lap plate 11 When the workpiece is placed on the placement plate 12, the pressure sensor 13 can sense and measure the pressure exerted by the workpiece on the placement plate 12 in real time, thereby indirectly reflecting the stability and weight information of the workpiece placement. The electric telescopic rod 15 is started to push the connecting plate 16 and the extrusion frame 17 forward until the extrusion frame 17 is closely attached to the surface of the workpiece. The design of the extrusion frame 17 has certain elasticity and adaptability, and can adapt to workpieces of different shapes and sizes, ensuring that the workpiece is firmly clamped to prevent movement or tilting during the detection process. At the same time, by adjusting the extension amount of the electric telescopic rod 15, The clamping force of the extrusion frame 17 on the workpiece is accurately controlled to avoid damage to the workpiece due to over-tight clamping or loosening of the workpiece due to over-loose clamping. The control switch 20, as the startup and operation core of the entire system, can conveniently control the start and stop of each component to ensure the orderly progress of the detection process. The HMI panel unit 21 provides an intuitive operation interface, through which the operator can input detection parameters, monitor the detection progress and view the detection results, which greatly improves the convenience of operation and the friendliness of human-computer interaction. The PLC control unit 22, as the control center of the entire system, receives the information from the HMI panel unit 21. The I panel unit 21 receives instructions and controls the precise movements of actuators such as the servo motor 4 and the electric telescopic rod 15, thereby realizing precise control of the detection process. The high-precision analog module 23 is responsible for converting the analog signals collected by sensors such as the grating ruler 10 and the pressure sensor 13 into digital signals, and transmits them to the PLC control unit 22 for processing, thereby realizing precise measurement of key parameters such as the relative position and pressure between the tool simulator 9 and the tool setting instrument to be detected. Finally, the printer 24 can automatically print out the detection report according to the processing results of the PLC control unit 22, which is convenient for the operator to record and analyze the detection results.

[0086] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for offline detection of tool setting instrument, characterized in that: include: Mounting platform (1); A mounting plate (2) is fixedly connected to one side of the top of the mounting platform (1), and a mounting frame (3) is fixedly connected to the top of the surface of the mounting plate (2); The inner wall of the installation frame (3) is fixedly connected to a servo motor (4), the output end of the servo motor (4) is installed with a driving rod (5), the bottom end of the driving rod (5) is fixedly connected to a lead screw (6), and the bottom end of the lead screw (6) is rotatably connected to the top of the installation platform (1), the surface of the lead screw (6) is threadedly connected to a threaded sleeve (7), the surface of the threaded sleeve (7) is fixedly connected to a fixing plate (8), the surface of the fixing plate (8) is fixedly connected to a tool simulator (9), a grating ruler (10) is fixedly connected to one side of the top of the installation platform (1) close to the mounting plate (2), an inner top wall of the grating ruler (10) is fixedly connected to an origin sensor (25), and upper and lower sides of the inner wall of the grating ruler (10) are fixedly connected to limit sensors (26).

2. The device for offline tool setting detection according to claim 1, characterized in that: The top of the installation platform (1) is fixedly connected to a lap plate (11), the top of the lap plate (11) is plugged with a placement plate (12), the bottom of the placement plate (12) is fixedly connected to a pressure sensor (13), and the bottom of the pressure sensor (13) is fixedly connected to the inner bottom wall of the lap plate (11).

3. The device for offline tool setting detection according to claim 1, characterized in that: Three fixed sleeves (14) are fixedly connected to the top of the installation platform (1) near the surface of the lap plate (11); an electric telescopic rod (15) is fixedly connected to the inner wall of the fixed sleeve (14); a connecting plate (16) is fixedly connected to the front end of the electric telescopic rod (15); an extrusion frame (17) is fixedly connected to the surface of the connecting plate (16); and the surface of the extrusion frame (17) is plugged into the inner wall of the fixed sleeve (14).

4. The device for offline tool setting detection according to claim 1, characterized in that: Both sides of the back side of the fixed plate (8) are fixedly connected with sliding blocks (18), both sides of the surface of the mounting plate (2) are fixedly connected with positioning rails (19), and the surface of the sliding block (18) is slidably connected to the inner wall of the positioning rail (19).

5. The device for offline tool setting detection according to claim 1, characterized in that: The top of the installation platform (1) is fixedly connected to a control switch (20); the top of the installation platform (1) is fixedly connected to a side of an HMI panel unit (21) close to the control switch (20); one side of the HMI panel unit (21) is electrically connected to a PLC control unit (22); one side of the PLC control unit (22) is electrically connected to a high-precision analog module (23); one side of the high-precision analog module (23) is electrically connected to a printer (24); and the bottoms of the HMI panel unit (21), the PLC control unit (22), the high-precision analog module (23) and the printer (24) are all fixedly connected to the top of the installation platform (1).

6. A method for offline detection of a tool setting instrument, applicable to an offline detection device for a tool setting instrument according to claims 1 to 5, characterized in that: The following steps are involved: S1. Associate the electronic control platform with the tool setting instrument platform, install the tool simulator, and place the tool setting instrument to be tested on the testing platform and fix it accurately through the positioning mechanism; S2. Start the electronic control platform, set the detection parameters through the HMI panel unit, and establish the reference coordinate point for the first time. The detection parameters include the measurement range, the measurement accuracy error range, the pressure range requirement, the number of repeated tool setting, the tool setting feed speed, and the rapid positioning speed; S3, start the detection process through the HMI panel unit control. After receiving the command, the PLC control unit controls the servo driver to drive the servo motor, driving the tool simulator to perform tool setting. At the same time, the grating ruler feeds back the position data of the tool simulator in real time, and the pressure sensor collects the pressure data during the tool setting process in real time; S4, the high-precision analog module extracts the analog signal of the pressure sensor and converts it into a digital signal and transmits it to the PLC control unit for processing and analysis. The PLC reads the grating ruler position data inside the driver. In order to quantify the performance of the tool setting instrument, a comprehensive performance evaluation index L is introduced, and its calculation formula is as follows: Where: N is the number of repeated tool setting (N ≥ 100), P i is the pressure data during the i-th tool setting, P max A is the maximum pressure value that the tool setting instrument can withstand. i is the position accuracy data of the i-th tool setting (obtained through grating ruler feedback), A ref is the reference position accuracy value, which is used for normalization processing. λ is the temperature influence coefficient, which indicates the influence of temperature change on position accuracy. i is the ambient temperature during the i-th tool setting; The pressure, position accuracy and temperature effects during tool setting are comprehensively considered. By calculating the comprehensive performance evaluation index of each tool setting, the performance of the tool setting instrument can be evaluated more accurately. The PLC control unit judges the data according to the preset standard (i.e. the threshold of the comprehensive performance evaluation index) to determine whether the performance of the tool setting instrument meets the requirements. S5. After the detection is completed, the PLC control unit transmits the detection results (including the comprehensive performance evaluation index L) to the HMI panel unit for display, and controls the printer to print the detection report through the HMI panel unit. The detection report includes various parameters of the tool setting instrument, detection results and adjustment suggestions.

7. The method for offline tool setting instrument detection according to claim 6, characterized in that: The tool setting is repeated at least 100 times to ensure the accuracy and reliability of the detection result.

8. The method for offline tool setting instrument detection according to claim 6, characterized in that: During the detection process, the grating ruler is used as an encoder for position feedback to form a fully closed-loop system, which is used to reduce the influence of thermal elongation of the screw caused by repeated tool setting, ensure the position accuracy of the tool setting, and at the same time detect the pressure during tool setting through the pressure sensor.

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