Machine tool measuring device and measuring method thereof

Abstract

According to the machine tool measuring device and the measuring method thereof, the measuring device comprises an external hanging type main body frame, a measuring probe, a driving mechanism and a protection mechanism, the driving mechanism is installed on the main body frame and used for driving the measuring probe to move, the protection mechanism is used for protecting the measuring probe, and the protection mechanism comprises a retractable door capable of being opened in a sliding mode. The measuring probe comprises a probe which can extend out of the telescopic door, the protection mechanism can effectively protect the measuring probe, a rodless cylinder is adopted as a power source of the driving mechanism, so that the structure is more compact, a probe rod is made of carbon fibers, the measuring device is lighter, and the driving mechanism can quickly drive the measuring probe to measure. The machining efficiency is improved, the overall time is shortened, and the machining rhythm is accelerated.

Description

Technical Field

[0001] The present invention relates to the field related to machine tool measurement, and in particular to a machine tool measuring device and a measuring method thereof. Background Art

[0002] In the current machine tool processing operation process, workpiece measurement mainly relies on the following two conventional methods: First, the machine tool's built-in probe is used for measurement. However, in actual operation, the machining tool in use must first be returned to the tool magazine, and then replaced with the probe that comes with the machine tool before the measurement process can be started. In this process, the repeated positioning error caused by each tool change operation is always difficult to completely eliminate, which has an extremely adverse effect on the subsequent machining accuracy and restricts the improvement of machining accuracy.

[0003] The second method is to use manual operation combined with measuring tools. This method is not only inefficient, but also requires the machine tool to be shut down for a long time during measurement. In addition, due to manual operation, the measurement error is often in a large range, which is difficult to meet the needs of high-precision processing.

[0004] Therefore, based on the drawbacks of the above two existing measuring machine tools, a Chinese utility model patent with publication number CN212735270U discloses a probe and system for measuring shaft processing, wherein a probe lifting device is arranged on the main shaft, and a probe is connected to the probe lifting device. By setting the probe, the shaft size can be automatically detected and the processing accuracy can be corrected when necessary. However, the probe is not provided with a protective mechanism, and is easily damaged by the workpiece or processing debris when processing the workpiece or measuring the distance. In addition, the measuring device is large in size, the structure is not compact enough, and it occupies more space, which affects the processing stroke of the machine tool. The extension and retraction of the probe is not fast and sensitive enough. Summary of the invention

[0005] The object of the present invention is to provide a machine tool measuring device and a measuring method thereof, which can effectively protect the measuring probe, and can quickly measure the workpiece and reduce the volume of the measuring device.

[0006] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a machine tool measuring device, including an external main frame, a measuring probe, a driving mechanism and a protective mechanism, wherein the driving mechanism is installed on the main frame and is used to drive the movement of the measuring probe, and the protective mechanism is used to protect the measuring probe; wherein the protective mechanism includes a telescopic door that can be slid open, and the measuring probe includes a probe, and the probe can be extended out of the telescopic door.

[0007] According to a further technical solution, the driving mechanism includes a telescopic cylinder, a cylinder slide and a probe rod, the telescopic cylinder is fixed on the main frame, a cylinder slide is slidably provided on the telescopic cylinder, the probe rod is fixed to the cylinder slide, and the measuring probe is fixed at the lower end of the probe rod.

[0008] A further technical solution is that a guide rail is fixed on the main frame, a base is slidably mounted on the guide rail, the probe rod is fixed on the base, a connecting plate is fixed on the base, the connecting plate is fixed to the cylinder slide, a positioning cone is fixed on the base, and a conical hole seat corresponding to the positioning cone is fixed on the main frame.

[0009] A further technical solution is that two oil pressure buffers are fixed on the main frame, the two oil pressure buffers are located on one side of the telescopic cylinder and are symmetrically arranged up and down, the cylinder slide is provided with a protruding plate, and the protruding plate can abut against the two oil pressure buffers, the oil pressure buffer has a built-in pressure sensor, and the telescopic cylinder is installed with a displacement sensor for real-time collection of the telescopic cylinder motion data, and uploading the data to the machine tool cloud, analyzing historical wear data through a machine learning model, predicting the life of the guide rail and the telescopic cylinder, and triggering maintenance reminders before component failure, thereby reducing unexpected downtime.

[0010] According to a further technical solution, a detection switch trigger block is fixed on the base, and a base detection switch is fixed on the main frame. The base detection switch can sense and generate an electrical signal and work in coordination with the detection switch trigger block.

[0011] According to a further technical solution, the measuring probe further comprises a probe seat, a quick-connect structure is fixed on the probe seat, the probe is fixed on the probe seat through the quick-connect structure, and a card slot is provided in the middle of the probe seat; A reference calibration block is installed on the main frame for self-calibration of the zero point of the measuring probe; The probe seat is integrated with a temperature sensor and a deformation monitoring module to monitor the deformation of the probe caused by changes in ambient temperature in real time.

[0012] According to a further technical solution, the protective mechanism further comprises a telescopic door cylinder, a telescopic door slide, and a fixed plate, wherein the telescopic door cylinder is fixed to the main frame, the telescopic door slide is slidably arranged on the main frame, the fixed plate is fixed to the telescopic door slide, the telescopic door slide is fixed to the telescopic door, the power output end of the telescopic door cylinder is fixed to the fixed plate, a card plate is fixed to the fixed plate, and the card plate can be inserted into the card slot to limit the falling of the measuring probe; The protection mechanism is provided with a tool storage location that can be extended and lifted, the tool storage location is installed on the main frame, and probes of different models are placed on the tool storage location; An acoustic emission sensor is embedded inside the probe seat to monitor in real time the vibration frequency of the probe contacting the workpiece during measurement.

[0013] According to a further technical solution, two telescopic door slides are provided, one of which is fixed with a first protrusion, and the other is fixed with a second protrusion, and a first detection switch, a second detection switch and a third detection switch are fixed on the main frame, the first detection switch corresponds to the first protrusion, and can contact and generate an electrical signal, and transmit the electrical signal to the controller of the machine tool, the second detection switch corresponds to the second protrusion, and can contact and generate an electrical signal, and the third detection switch can contact the fixed plate and generate an electrical signal.

[0014] A further technical solution is that an annular air gap is provided at the edge of the telescopic door, and the annular air gap is connected to the machine tool air source. When the telescopic door is opened, a high-speed airflow is ejected to form an isolation air curtain. An integrated negative pressure fan is provided at the bottom of the main frame. During the probe measurement process, the integrated negative pressure fan continuously extracts dust from the inside of the protective mechanism.

[0015] A measuring method for a machine tool measuring device, the measuring method is based on the above-mentioned measuring device, and a machine tool using the measuring device: Step 1: placing the workpiece to be processed at a predetermined processing position of the machine tool; Step 2: According to the geometric features of the workpiece, the adapter probe is called through programming instructions to control the measuring probe to align the workpiece; Step 3: The protective mechanism is turned on and a self-check is performed to determine whether the telescopic door is open; If yes, the driving mechanism drives the measuring probe to extend, the probe performs self-calibration, prepares for the measurement task, and proceeds to step 4; If not, the machine tool will sound an alarm and wait for manual inspection before restarting the measuring device; Step 4: Control the movement of each axis of the machine tool so that the probe is accurately positioned at the measuring point of the workpiece, and perform multi-point measurement on the workpiece. During the measurement process, the probe measurement coordinates are dynamically adjusted according to the temperature data to eliminate thermal drift errors; Step 5: The measured data is transmitted to the control system of the machine tool in real time via the data processing unit inside the machine tool, and the machining allowance and machining path of the machine tool are dynamically adjusted; Step 6: The measurement results are recorded and stored in the machine tool's backend database for subsequent query and analysis.

[0016] In summary, the present invention has the following beneficial effects: 1. The external design can be easily installed on the machine tool. Compared with the built-in measuring system of the machine tool, this measuring device does not require tool change, eliminates repeated positioning errors, and improves the processing rate. The protective mechanism can effectively protect the measuring probe, and the use of a contact-type ruby ​​probe can avoid damage to the measuring probe during processing. Compared with manual measurement, the contact probe is combined with a ruby ​​probe needle to significantly reduce human interference, greatly improve measurement accuracy, and provide a solid guarantee for workpiece quality. It also has the ability to accurately measure workpieces of various shapes and sizes, improving the overall quality and efficiency of machine tool processing.

[0017] 2. High precision and high speed: The power source of the driving mechanism adopts a rodless cylinder, which makes the structure more compact, and the probe rod is made of carbon fiber, which makes the measuring device lighter and reduces the weight of the measuring device to prevent the measuring device from being too heavy and affecting the motion accuracy of the machine tool's motion axis. The driving mechanism can quickly drive the measuring probe for measurement and improve processing efficiency; the driving mechanism drives the measuring probe for automatic measurement and real-time data transmission. You only need to place the workpiece and control it through the program to quickly complete the measurement and transmit the data, shortening the overall time and speeding up the processing rhythm.

[0018] 3. The side external mounting design does not require major modifications to the machine tool, saves space, does not interfere with the machine tool's processing stroke, and the main body is made of aluminum alloy, which effectively reduces the overall cost.

[0019] 4. Strong stability, the aluminum alloy frame is light, anti-interference, and high in strength. The rodless cylinder is matched with a carbon fiber tube to connect the probe, which has good rigidity and provides guarantee for the long-term stable operation of the measuring device.

[0020] 5. The measurement data can not only help the machine tool to accurately adjust the processing parameters and realize intelligent precision processing, but also can be conveniently stored and traced back, which is convenient for subsequent in-depth analysis and mining, and improves convenience.

[0021] 6. The probe can be replaced and quickly connected to realize automatic calling for processing and measuring of different workpieces.

[0022] 7. The dual mechanism of collision warning and air curtain protection protects the probe and increases its service life.

[0023] 8. Proactive maintenance reminders reduce unexpected downtime and improve subsequent processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work. Figure 1 It is a first three-dimensional structural schematic diagram of the present application; Figure 2 is a second three-dimensional structural schematic diagram of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the upper half of the measuring device of this application; Figure 4 It is a first three-dimensional structural schematic diagram of the lower half of the measuring device of the present application; Figure 5 is a second three-dimensional structural schematic diagram of the lower half of the measuring device of the present application; Figure 6 It is a schematic diagram of the position of the measuring device of the present application installed on the machine tool.

[0025] In the figure: 100, main frame; 101, first substrate; 102, second substrate; 103, shield support plate; 104, aluminum alloy shield; 105, wiring clamp; 200, measuring probe; 201, probe; 202, probe seat; 203, slot; 300, driving mechanism; 301, telescopic cylinder; 302, cylinder slide; 303, probe rod; 304, guide rail; 305, base; 306, positioning cone; 307, cone hole seat; 308, connecting plate; 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379 09, hydraulic buffer; 310, protruding plate; 311, detection switch trigger block; 312, base detection switch; 313, fixing buckle; 400, protection mechanism; 401, telescopic door; 402, telescopic door cylinder; 403, telescopic door slide; 404, fixing plate; 405, first protrusion; 406, first detection switch; 407, second protrusion; 408, second detection switch; 409, third detection switch; 410, clamping plate; 500, spindle slide base. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the examples, but the embodiments of the present invention are not limited thereto. The technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0031] Combined with Figure 1-Figure 6 The figure shows a machine tool measuring device, which includes an external main frame 100, a measuring probe 200, a driving mechanism 300 and a protection mechanism 400.

[0032] Specifically, the main frame 100 includes a first substrate 101 and a second substrate 102, the first substrate 101 and the second substrate 102 are fixed by bolts, two second substrates 102 are provided, the first substrate 101 and the two second substrates 102 constitute the main frame 100, and the first substrate 101 and the two second substrates 102 are vertically arranged, and the first substrate 101 and the second substrate 102 are made of aluminum alloy. The aluminum alloy material has the significant advantages of light weight and outstanding strength, and also has excellent anti-electromagnetic interference ability, which is in line with the actual application requirements of the measuring device.

[0033] Bolt fixing holes are provided on the main frame 100 to ensure a firm and reliable fixed connection with the spindle slide base 500 of the machine tool to ensure stable operation of the device. Two shield support plates 103 are provided above the main frame 100 for installing an aluminum alloy shield 104 outside the main frame 100.

[0034] A plurality of wiring clamps 105 are provided on the first substrate 101 and the second substrate 102 on the left side. The wiring clamps 105 are used to organize the wires and air pipes, effectively avoid the disorder of the lines, and ensure the stability and safety of the operation of the device.

[0035] The driving mechanism 300 is installed on the main frame 100 and is used to drive the measurement probe 200 to move.

[0036] Specifically, the driving mechanism 300 is installed on the front side of the first substrate 101, and the driving mechanism 300 includes a telescopic cylinder 301, a cylinder slide 302 and a probe rod 303. The telescopic cylinder 301 is vertically fixed on the first substrate 101, and the telescopic cylinder 301 adopts a rodless cylinder. The rodless cylinder has the outstanding advantage of small size. Compared with conventional cylinders, it can save length space and reduce occupied volume, creating favorable conditions for the compact layout of the entire measuring device. A cylinder slide 302 is slidably provided on the telescopic cylinder 301, and the probe rod 303 is fixed to the cylinder slide 302.

[0037] Specifically, two vertical guide rails 304 are fixed on the first substrate 101 of the main frame 100, and a base 305 is slidably installed on the guide rails 304. Specifically, four sliders (not shown) are fixedly provided on the base 305, and the four sliders are respectively slidably installed on the two guide rails 304. At least two fixing buckles 313 are fixed on the base 305, and the probe rod 303 is fixed to the base 305 by the fixing buckles 313. A connecting plate 308 is fixed on the base 305, and the connecting plate 308 is fixed to the cylinder slide 302.

[0038] Specifically, in order to strengthen the rigidity of the probe rod 303 and reduce the overall weight of the measuring device, the probe rod 303 uses a carbon fiber tube to connect the measuring probe 200, and the measuring probe 200 is tightly fixed at the lower end of the probe rod 303. This design effectively enhances the stability of the measuring probe 200 and provides favorable support for precise measurement.

[0039] Two positioning cones 306 are fixed on the bottom surface of the base 305, and two tapered hole seats 307 corresponding to the positioning cones 306 are fixed on the first substrate 101. When the base 305 slides up and down, it can be accurately positioned with the two tapered hole seats 307, thereby ensuring the repeated positioning accuracy of the device in the direction of the machine tool motion axis, providing a solid guarantee for high-precision measurement.

[0040] Furthermore, two oil pressure buffers 309 are fixed on the first substrate 101, and the two oil pressure buffers 309 are located on one side of the telescopic cylinder 301 and are symmetrically arranged up and down. A protruding protruding plate 310 is provided on the cylinder slide 302, and the protruding plate 310 can abut against the two oil pressure buffers 309. When the base 305 moves up and down, the protruding plate 310 can abut against the oil pressure buffer 309, and play a role of shock absorption and buffering in a timely and effective manner, thereby ensuring the smooth operation of the device and reducing the influence of vibration on the measurement accuracy.

[0041] The hydraulic buffer 309 has a built-in pressure sensor (not shown), and the telescopic cylinder 301 is installed with a displacement sensor (not shown), which is used to collect the movement data of the telescopic cylinder 301 in real time and upload the data to the machine tool cloud. The historical wear data is analyzed through a machine learning model to predict the life of the guide rail 304 and the telescopic cylinder 301, and maintenance reminders are triggered before the components fail, thereby reducing unexpected downtime and achieving predictive maintenance.

[0042] Specifically, the motion data of the telescopic cylinder 301 includes the oil pressure data collected by the pressure sensor and the position data collected by the displacement sensor. The oil pressure data can be used to analyze the working status of the oil pressure buffer 309. For example, an abnormal pressure peak indicates buffer failure, or a change in the slope of the pressure curve indicates oil aging. The historical pressure and vibration data are analyzed by a machine learning model to identify the wear of the oil pressure buffer seal in advance, which is manifested as a decrease in buffer pressure.

[0043] The displacement sensor is used to monitor the position of the cylinder slide 302 on the telescopic cylinder 301, determine the stroke position of the cylinder slide 302, and calculate the speed and acceleration of the cylinder slide 302 in combination with the time data, which is used to analyze the smoothness of the movement. When the acceleration fluctuates, it is generally due to the wear of the guide rail or the cylinder slide that causes the movement to be unstable, and a maintenance reminder is triggered at this time.

[0044] Furthermore, a detection switch trigger block 311 is fixed on the base 305, and a base detection switch 312 is fixed on the main frame 100. The detection switch trigger block 311 corresponds to the base detection switch 312, and the two work together. The base detection switch 312 can contact the detection switch trigger block 311 and generate an electrical signal, and transmit the electrical signal to the data processing module or controller of the machine tool, or infrared sensing is used. For example, the base detection switch 312 emits infrared rays, the detection switch trigger block 311 receives the infrared rays and feeds back to the base detection switch 312. The base detection switch 312 senses and generates an electrical signal, thereby accurately judging whether the base 305 has run to the preset target position.

[0045] The measuring probe 200 includes a probe seat 202 , a probe 201 and a quick-connect mechanism (not shown). The probe 201 is fixed to the probe seat 202 via the quick-connect structure. A slot 203 is provided in the middle of the probe seat 202 . The probe seat 202 is fixed to the bottom end of the probe rod 303 .

[0046] Specifically, the probe 201 is a contact probe with high precision and high sensitivity. It is equipped with a ruby ​​detection needle and is wear-resistant. It can accurately sense and capture the subtle conditions of the workpiece surface, providing a favorable guarantee for accurate measurement.

[0047] The quick-connect structure can adopt a conical guide plus ball head design. A conical guide plus ball head design is adopted at one end of the probe 201, and the corresponding position of the probe seat 202 is designed as a combination of a conical hole and a concave ball socket, so as to realize fast and accurate alignment of the probe and the probe seat, and ensure that the probe 201 is automatically centered when inserted into the probe seat 202. The locking can be achieved by electromagnet locking, and an electric double locking ring (not shown) is set inside the probe seat 202. The inner locking ring is used to initially fix the probe 201, and the outer locking ring is used for stable locking.

[0048] The main frame 100 is provided with a reference calibration block (not shown) for self-calibrating the zero point of the measuring probe. The reference calibration block realizes self-calibration of the zero point through laser ranging feedback to ensure the consistency of the measurement reference.

[0049] The probe seat 202 is integrated with a micro temperature sensor (not shown) and a deformation monitoring module (not shown) to monitor the deformation of the probe 201 caused by changes in ambient temperature in real time. The machine tool system has a built-in algorithm to dynamically adjust the measurement coordinates of the probe 201 according to temperature data to eliminate thermal drift errors.

[0050] The protection mechanism 400 includes a telescopic door 401, a telescopic door cylinder 402, a telescopic door slide 403, and a fixed plate 404. The telescopic door 401 can be slid open or closed. The telescopic door cylinder 402 is fixed on the second substrate 102. The telescopic door slide 403 is slidably set on the second substrate 102. The fixed plate 404 is fixed to the telescopic door slide 403. The telescopic door slide 403 is fixed to the telescopic door 401. The power output end of the telescopic door cylinder 402 is fixed to the fixed plate 404. A card plate 410 is fixed on the fixed plate 404. The card plate 410 is "L"-shaped. The card plate 410 can be inserted into the card slot 203 to limit the falling of the measuring probe 200.

[0051] Specifically, when the telescopic door 401 is closed, the card plate 410 is just stuck in the card slot 203, which effectively prevents the probe rod 303 from falling when an accident such as cylinder gas failure occurs, thereby ensuring the safe operation of the measuring device.

[0052] The protection mechanism 400 is provided with a tool storage position (not shown) that can be extended and lifted. The lifting and lowering can be achieved by driving the telescopic arm to lift and lower by a small cylinder. The extension and retraction can be achieved by extending and retracting the telescopic arm. The tool storage position is installed on the main frame 100. Different types of probes 201 are placed on the tool storage position. By extending and retracting the tool storage position, different types of probes can be moved to the bottom of the probe seat 202. Then, by lifting and lowering the tool storage position, the probe 201 can be installed. Therefore, the adapter probe 201 can be automatically called according to different workpieces to achieve the measurement of multi-dimensional data of complex workpieces. The probe seat 202 is embedded with an acoustic emission sensor for real-time monitoring of the vibration frequency of the probe contacting the workpiece during measurement. For example, when abnormal high-frequency vibration is detected, such as a collision, an emergency retraction program is immediately triggered, and the drive mechanism 300 drives the probe 201 to retract quickly. At the same time, the telescopic door 401 is closed, and the card plate 410 and the card slot 203 form a mechanical lock to prevent the probe 201 from falling and being damaged.

[0053] The telescopic door slide 403 is provided with two, which are divided into an upper telescopic door slide 403 and a lower telescopic door slide 403. A first protrusion 405 is fixed on the upper telescopic door slide 403, and a second protrusion 407 is fixed on the lower telescopic door slide 403. A first detection switch 406, a second detection switch 408 and a third detection switch 409 are fixed on the second substrate 102. The first detection switch 406 can contact and sense the first protrusion 405. The first protrusion 405 and the first detection switch 406 work in coordination, and an electrical signal is generated when contacted, and the electrical signal is transmitted to the data processing module or controller of the machine tool for the machine tool to determine whether the anti-locking device is in operation or not. The protective mechanism 400 is opened or closed in place, the second detection switch 408 can contact and sense the second protrusion 407, the second protrusion 407 and the second detection switch 408 work together, an electrical signal is generated when in contact, and the electrical signal is transmitted to the data processing module or controller of the machine tool, which is used for the machine tool to determine whether the protective mechanism 400 is opened or closed in place, the third detection switch 409 can contact and sense the fixed plate 404, the fixed plate 404 and the third detection switch 409 work together, an electrical signal is generated when in contact, and the electrical signal is transmitted to the data processing module or controller of the machine tool, which is used for the machine tool to determine whether the card plate 410 is inserted into the card slot 203.

[0054] Specifically, the first detection switch 406 and the second detection switch 408 are used to accurately detect the moving position of the telescopic door 401. When the telescopic door 401 is opened, the second protrusion 407 works to control the fixed plate 404 to drive the telescopic door slide 403 and the telescopic door 401 to move, so that the telescopic door 401 is opened. If the first protrusion 405 contacts the first detection switch 406, at this time, the first detection switch 406 determines that the telescopic door 401 is fully opened. If the machine tool sends an instruction to the measuring device to open the telescopic door 401, the first protrusion 405 does not contact the first detection switch 406, and the first detection switch 406 determines that the telescopic door 401 is not fully opened. At this time, the measuring probe 200 will not work.

[0055] Similarly, if the second detection switch 408 contacts the second protrusion 407 , the second detection switch 408 determines that the telescopic door 401 is fully closed.

[0056] The third detection switch 409 is used to detect whether the card plate 410 is in place. If the third detection switch 409 contacts the fixing plate 404 , it is determined that the card plate 410 is inserted into the card slot 203 .

[0057] The probe 201 will extend out of the telescopic cylinder 301 to perform measurement work only when the telescopic door 401 is fully opened.

[0058] The protection mechanism 400 is used to protect the measuring probe 200 .

[0059] Furthermore, an annular air gap is provided at the edge of the telescopic door 401, and the annular air gap is connected to the machine tool air source. When the telescopic door 401 is opened, a high-speed airflow is ejected to form an isolation air curtain to prevent the invasion of cutting fluid and debris. An integrated negative pressure fan is provided at the bottom of the main frame 100. During the measurement of the probe 201, the integrated negative pressure fan continuously extracts dust inside the protective mechanism to maintain the cleanliness of the working environment of the probe 201 and extend its service life.

[0060] Installation and commissioning of measuring devices: First, use bolts to firmly fix the measuring device on the spindle slide base 500 of the machine tool. During the installation process, pay special attention to ensure that the device is in a horizontal state. After it is firmly fixed, connect the power supply and air pipe lines, turn on the measuring device, and then calibrate the initial parameters of the measuring instrument. Simultaneously, accurately debug and calibrate the sensitivity and zero position of the contact measuring probe until the measuring device enters an accurate working state.

[0061] A measuring method for a machine tool measuring device, the measuring method, the measuring device and a machine tool using the measuring device.

[0062] Step 1: placing the workpiece to be processed at a predetermined processing position of the machine tool; Step 2: According to the geometric features of the workpiece, the adaptor probe is called through programming instructions to control the measuring probe 200 to align the workpiece; Step 3: The protection mechanism 400 is turned on and performs a self-check to determine whether the telescopic door 401 is open; If yes, the driving mechanism 300 drives the measuring probe 200 to extend, the probe performs self-calibration, prepares for the measurement task, and enters step 4; If not, the machine tool will sound an alarm and wait for manual inspection before restarting the measuring device; Step 4: Control the movement of each axis of the machine tool so that the probe 201 is accurately positioned at the measuring point of the workpiece, and multi-point measurement is performed on the workpiece. During the measurement process, the probe measurement coordinates are dynamically adjusted according to the temperature data to eliminate thermal drift errors; Step 5: The measured data is transmitted to the control system of the machine tool in real time via the data processing unit inside the machine tool, and the machining allowance and machining path of the machine tool are dynamically adjusted; Step 6: The measurement results are recorded and stored in the machine tool's backend database for subsequent query and analysis.

[0063] Specifically, step 1, place the workpiece: Use a special fixture to fix the workpiece to be processed on the workbench to ensure that it is located in the predetermined processing coordinate system.

[0064] After clamping, check whether the position of the workpiece meets the preset tolerance requirements.

[0065] Step 2: Programming and alignment: According to the model of the workpiece, write code instructions on the machine tool controller, call the adapter probe, install the probe, and define the measurement path and key points.

[0066] Then, the measuring program is started, the probe 201 is controlled to move to the initial alignment position, and the relative position between the probe 201 and the workpiece is calibrated.

[0067] Step 3: Self-check of the protection mechanism 400: The system automatically detects the state of the telescopic door 401. If it is fully open, the measuring probe 200 is allowed to continue working; if it is not fully open, an alarm is triggered and the operation is suspended until the measuring probe 200 is restarted after manual confirmation of safety.

[0068] Step 4: Accurate positioning and measurement: The machine tool's control system accurately moves each axis according to the programmed instructions, so that the probe contacts multiple feature points on the workpiece in turn, such as aperture, edge, etc., and records the measurement data. During the measurement process, the probe measurement coordinates are dynamically adjusted according to the temperature data to eliminate thermal drift errors.

[0069] The measurement results are fed back to the control system in real time to ensure the accuracy of each measurement point.

[0070] During the extension and retraction of the probe, the pressure sensor collects the oil pressure data of the oil pressure buffer 309. The oil pressure data can be used to analyze the working status of the oil pressure buffer 309. For example, an abnormal pressure peak indicates buffer failure, or a change in the slope of the pressure curve indicates oil aging. The historical pressure and vibration data are analyzed by a machine learning model to identify the wear of the oil pressure buffer seal in advance, which is manifested as a decrease in buffer pressure.

[0071] The displacement sensor is used to monitor the position of the cylinder slide 302 on the telescopic cylinder 301, determine the stroke position of the cylinder slide 302, and calculate the speed and acceleration in combination with the time data to analyze the smoothness of the movement of the cylinder slide 302. When the acceleration fluctuates, it is generally due to the wear of the guide rail or the cylinder slide that causes the movement to be unstable, which triggers a maintenance reminder.

[0072] Step 5: Data processing and dynamic adjustment of machine tools: The data processing unit receives the measurement signal from the measurement probe 200 and calculates the difference between the actual size and the design value.

[0073] If the deviation is found to be beyond the set range, the control system automatically adjusts the tool path and feed speed to optimize the subsequent processing process.

[0074] Step 6: Record and store data: All measurement data and adjustment information are recorded and uploaded to the backend database.

[0075] These data can be used for quality traceability, statistical analysis, and to provide reference for similar tasks in the future.

[0076] Furthermore, the measuring probe 200 can be executed after pausing or stopping during the processing to adapt to different processing requirements, and the measuring probe 200 can perform self-calibration according to a preset program and a reference calibration block to maintain the accuracy of the measurement.

[0077] The measuring device can measure the center coordinates, diameter and other key dimensional parameters of the workpiece, and the measuring process is fully automated without manual intervention.

[0078] Specifically, when measuring key measuring points of a workpiece, such as measuring an inner hole of a workpiece, the probe 201 will first measure two points in the X direction and then two points in the Y direction, and calculate the center of the workpiece based on these four sets of coordinates, and can also calculate the diameter of the workpiece.

[0079] Specifically, with the help of the machine tool's own complete variable system, the precise data obtained by the measuring device is quickly and efficiently transmitted to the machine tool variables. The machine tool control system automatically adjusts the machining allowance based on these real-time and accurate data, thereby achieving precision machining of the workpiece and ensuring that the machining accuracy always meets high standards.

[0080] Not only that, the measurement results can also be stored in the machine tool background text in an orderly manner, which is convenient for subsequent retrieval and query at any time, in-depth analysis and research, and provides key data support for quality traceability, process optimization, etc.

[0081] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A machine tool measuring device, characterized in that: The invention comprises an externally mounted main frame (100), a measuring probe (200), a driving mechanism (300) and a protective mechanism (400), wherein the driving mechanism (300) is mounted on the main frame (100) and is used to drive the measuring probe (200) to move, and the protective mechanism (400) is used to protect the measuring probe (200); wherein the protective mechanism (400) comprises a telescopic door (401) that can be slid open, and the measuring probe (200) comprises a probe (201), and the probe (201) can extend out of the telescopic door (401).

2. A machine tool measuring device according to claim 1, characterized in that: The driving mechanism (300) comprises a telescopic cylinder (301), a cylinder slide (302) and a probe rod (303); the telescopic cylinder (301) is fixed on the main frame (100); the cylinder slide (302) is slidably provided on the telescopic cylinder (301); the probe rod (303) is fixed to the cylinder slide (302); and the measuring probe (200) is fixed to the lower end of the probe rod (303).

3. A machine tool measuring device according to claim 2, characterized in that: A guide rail (304) is fixed on the main frame (100), a base (305) is slidably mounted on the guide rail (304), the probe rod (303) is fixed on the base (305), a connecting plate (308) is fixed on the base (305), the connecting plate (308) is fixed to the cylinder slide (302), a positioning cone (306) is fixed on the base (305), and a tapered hole seat (307) corresponding to the positioning cone (306) is fixed on the main frame (100).

4. A machine tool measuring device according to claim 3, characterized in that: Two oil pressure buffers (309) are fixed on the main frame (100). The two oil pressure buffers (309) are located on one side of the telescopic cylinder (301) and are symmetrically arranged up and down. A protruding plate (310) is arranged on the cylinder slide (302). The protruding plate (310) can abut against the two oil pressure buffers (309). The oil pressure buffer (309) has a built-in pressure sensor. A displacement sensor is installed on the telescopic cylinder (301) for collecting movement data of the telescopic cylinder (301) in real time.

5. A machine tool measuring device according to claim 3, characterized in that: A detection switch trigger block (311) is fixed on the base (305), and a base detection switch (312) is fixed on the main frame (100); the base detection switch (312) is capable of inducing and generating an electrical signal and working in coordination with the detection switch trigger block (311).

6. A machine tool measuring device according to claim 1, characterized in that: The measuring probe (200) further comprises a probe seat (202), a quick-connect structure being fixed on the probe seat (202), the probe (201) being fixed on the probe seat (202) via the quick-connect structure, and a slot (203) being provided in the middle of the probe seat (202); A reference calibration block is mounted on the main frame (100) and is used for self-calibration of the zero point of the measuring probe (200); The probe seat (202) is integrated with a temperature sensor and a deformation monitoring module to monitor in real time the deformation of the probe (201) caused by changes in ambient temperature.

7. A machine tool measuring device according to claim 6, characterized in that: The protection mechanism (400) further comprises a telescopic door cylinder (402), a telescopic door slide (403), and a fixing plate (404); the telescopic door cylinder (402) is fixed on the main frame (100); the telescopic door slide (403) is slidably arranged on the main frame (100); the fixing plate (404) is fixed to the telescopic door slide (403); the telescopic door slide (403) is fixed to the telescopic door (401); a power output end of the telescopic door cylinder (402) is fixed to the fixing plate (404); a clamping plate (410) is fixed to the fixing plate (404); the clamping plate (410) can be clamped into the clamping slot (203) to limit the falling of the measuring probe (200); A tool storage location that is retractable and liftable is provided in the protection mechanism (400), the tool storage location is installed on the main frame (100), and probes (201) of different models are placed on the tool storage location; An acoustic emission sensor is embedded inside the probe seat (202) and is used to monitor in real time the vibration frequency of the probe (201) contacting the workpiece during measurement.

8. A machine tool measuring device according to claim 7, characterized in that: The telescopic door slides (403) are provided with two, one of which is fixed with a first protrusion (405), and the other of which is fixed with a second protrusion (407). The main frame (100) is fixed with a first detection switch (406), a second detection switch (408) and a third detection switch (409). The first detection switch (406) corresponds to the first protrusion (405) and is capable of contacting and generating an electrical signal and transmitting the electrical signal to a controller of the machine tool. The second detection switch (408) corresponds to the second protrusion (407) and is capable of contacting and generating an electrical signal. The third detection switch (409) is capable of contacting the fixed plate (404) and generating an electrical signal.

9. A machine tool measuring device according to any one of claims 1 to 8, characterized in that: An annular air gap is provided at the edge of the telescopic door (401), and the annular air gap is connected to the air source of the machine tool. When the telescopic door (401) is opened, a high-speed airflow is ejected to form an isolation air curtain. An integrated negative pressure fan is provided at the bottom of the main frame (100). During the measurement process of the probe (201), the integrated negative pressure fan continuously extracts dust inside the protective mechanism.

10. A measuring method for a machine tool measuring device, the measuring method being based on the measuring device according to any one of claims 1 to 9, and a machine tool using the measuring device, characterized in that: Step 1: placing the workpiece to be processed at a predetermined processing position of the machine tool; Step 2: According to the geometric features of the workpiece, the adapter probe is called through programming instructions to control the measuring probe to align the workpiece; Step 3: The protective mechanism is turned on and a self-check is performed to determine whether the telescopic door is open; If yes, the driving mechanism drives the measuring probe to extend, the probe performs self-calibration, prepares for the measurement task, and proceeds to step 4; If not, the machine tool will sound an alarm and wait for manual inspection before restarting the measuring device; Step 4: Control the movement of each axis of the machine tool so that the probe is accurately positioned at the measuring point of the workpiece, and perform multi-point measurement on the workpiece. During the measurement process, the probe measurement coordinates are dynamically adjusted according to the temperature data to eliminate thermal drift errors; Step 5: The measured data is transmitted to the control system of the machine tool in real time via the data processing unit inside the machine tool, and the machining allowance and machining path of the machine tool are dynamically adjusted; Step 6: The measurement results are recorded and stored in the background database of the machine tool.

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