Intelligent sizing block and using method thereof

Abstract

The invention discloses an intelligent sizing block and a using method thereof, and belongs to the technical field of sizing blocks, the intelligent sizing block comprises a height-adjustable sizing block and a hydraulic force measuring device, the bottom of the height-adjustable sizing block is fixedly connected to the hydraulic force measuring device, the hydraulic force measuring device comprises a hydraulic rod, a hydraulic base and a pressure transmitter, and the hydraulic base is provided with a hydraulic oil containing cavity; a plurality of through holes are evenly formed in the top of the hydraulic base, a hydraulic rod is arranged in each through hole, the outer ends of the hydraulic rods are connected with the bottom of the height-adjustable sizing block, and a pressure transmitter is further arranged on the side face of the hydraulic base and used for measuring the pressure in the hydraulic oil containing cavity. The bearing capacity of the sizing block is detected through the hydraulic force measuring device composed of the hydraulic base, the hydraulic rod and the pressure transmitter, detection is stable, reliable and accurate, the bearing capacity of the sizing block is adjusted according to a detection value, and balance adjustment of equipment supporting is rapidly achieved.

Description

Technical Field

[0001] This invention relates to the field of shim technology, specifically to an intelligent shim for installing machine tools, laser cutting machines, coordinate measuring machines and other precision or heavy equipment, and its usage method. Background Technology

[0002] During the installation and commissioning of machine tools, laser cutting machines, coordinate measuring machines, and other precision or heavy equipment, it is usually necessary to place several sets of shims between the equipment base and the foundation to support the weight of the equipment and achieve leveling. Traditional shims are mostly three-layer adjustable shims with inclined surfaces or spiral lifting shims. Their height is coarsely and finely adjusted by manually rotating bolts. The leveling process relies on repeatedly measuring the levelness of the equipment guide rails or worktable using a level, dial indicator, or laser tracker. Because it is impossible to know the vertical load borne by each shim in real time, installers can only rely on experience to judge:

[0003] 1. If a certain shim is subjected to excessive force, it can easily cause the equipment to twist or bend, directly affecting the performance and accuracy of the equipment;

[0004] 2. If a certain shim is subjected to insufficient force or even becomes loose, it will cause the overall support of the equipment to be unbalanced, which will easily lead to equipment deformation and directly affect the accuracy and stability of the equipment;

[0005] 3. During the debugging process, if the stress of each shim is unknown, it is necessary to rely on experience to repeatedly try and adjust it, which is not only time-consuming, but also requires the cooperation of many people, resulting in low installation efficiency and difficulty in ensuring long-term stability.

[0006] To address the aforementioned problems, existing technologies have included methods such as attaching strain gauges inside the shims or using pressure sensors. However, these methods generally suffer from the following drawbacks:

[0007] a) The strain gauge output signal is weak and has a large temperature drift, requiring additional amplification circuitry and temperature compensation, resulting in a complex system with poor reliability.

[0008] b) Conventional pressure sensors are large in size and have low rigidity, requiring changes to the dimensions of the shim structure, making it difficult to directly replace traditional shims;

[0009] c) Most existing force-measuring pads use wired transmission, which is difficult to wire and lacks wireless remote transmission, cloud storage and multi-terminal display functions, which cannot meet the needs of modern intelligent manufacturing workshops for real-time monitoring of equipment operating status.

[0010] Therefore, there is an urgent need for an intelligent pad device that is compact in structure, has stiffness comparable to traditional pads, and can accurately measure and wirelessly transmit the load-bearing capacity of each support point in real time. Summary of the Invention

[0011] The first objective of this invention is to provide an intelligent shim and its usage method, which can monitor changes in the shim's load-bearing capacity and adjust the shim's load-bearing capacity based on the measured pressure value, so that the equipment support achieves balance.

[0012] To achieve the first objective, the present invention provides the following technical solution: an intelligent leveling pad, comprising a height-adjustable leveling pad and a hydraulic force measuring device. The bottom of the height-adjustable leveling pad is fixedly connected to the hydraulic force measuring device. The hydraulic force measuring device includes a hydraulic rod, a hydraulic base, and a pressure transmitter. The hydraulic base has a hydraulic oil receiving cavity and multiple evenly arranged through holes on its top. A hydraulic rod is arranged in each through hole. The outer end of the hydraulic rod is connected to the bottom of the height-adjustable leveling pad. A pressure transmitter is also provided on the side of the hydraulic base. The pressure transmitter is used to measure the pressure inside the hydraulic oil receiving cavity.

[0013] Furthermore, the aforementioned height-adjustable pad includes a lower connecting plate, a middle ramp drive plate, an upper ramp driven plate, and a drive screw. The bottom surface of the lower connecting plate is fixedly connected to the outer ends of multiple hydraulic rods. A first guide slider is provided on the top surface of the lower connecting plate. A first guide groove is provided at the bottom of the middle ramp drive plate. The first guide slider is embedded in the first guide groove and can move relative to the first guide groove. A first ramp is provided on the top surface of the middle ramp drive plate. A second guide groove is provided on the first ramp. A second ramp that fits against the first ramp is provided at the bottom of the upper ramp driven plate. A second guide slider is provided at the bottom of the second ramp. The drive screw is rotatably connected to the higher side of the middle slope drive plate and spirally connected to the connecting column. The two ends of the connecting column are respectively movably embedded into the first guide limiting hole and the second guide limiting hole. The middle slope drive plate is provided with a strip-shaped first cavity with openings at both the top and bottom. The first guide limiting hole is located at the top of the lower connecting plate directly opposite the bottom of the first cavity. The bottom of the upper slope driven plate is provided with a second cavity. The top of the second cavity is provided with a second guide limiting hole. Rotating the drive screw can drive the middle slope drive plate to move relative to the upper slope driven plate and raise the upper slope driven plate.

[0014] Furthermore, the pressure transmitter is connected to a controller, which in turn is connected to a terminal device and a cloud server via a wireless module.

[0015] Furthermore, the controller is mounted on a circuit board, which is fixedly connected to the protective housing, which is fixedly connected to the side of the hydraulic base.

[0016] The second objective of this invention is to provide a method for using intelligent shims that enables precise adjustment of equipment support and balance.

[0017] Regarding the second objective, the technical solution adopted by this invention is: a method for using a smart pad, the method comprising the following steps:

[0018] 1) Calculate the load-bearing capacity at the location of each smart pad based on the machine tool weight theory. Assuming there are N pads, the load-bearing capacity F of each smart pad is... 初 =M / N, where M is the weight of the machine tool; for example, if four smart pads are evenly distributed, the bearing capacity of each foot is one-quarter of the weight of the machine tool.

[0019] 2) Place multiple smart pads under the required support position of the machine tool;

[0020] 3) The height-adjustable intelligent shim is affected by the weight of the machine tool, causing the four hydraulic rods of the hydraulic force measuring device to move downwards, thereby changing the pressure inside the hydraulic base. The pressure is measured by a pressure transmitter, and the output signal of the pressure transmitter is linearly related to the input pressure. The general formula is: (1)

[0021] In the formula, To measure the actual pressure, / This refers to the lower / upper limit of the measurement range. / This refers to the lower / upper limit of the output signal;

[0022] 4) The current signal from the pressure transmitter is transmitted to the analog signal port connected to the controller, converting the analog current signal into a digital signal. Based on the relationship between pressure and current (1), the pressure magnitude is obtained. Then, based on the diameter D of the hydraulic rod, according to the relationship:

[0023] (2)

[0024] Where F is the load-bearing capacity of the smart pad;

[0025] The bearing capacity value is obtained according to formula (2);

[0026] 5) After obtaining the load-bearing capacity value, use the wireless module to transmit the load-bearing capacity value to the terminal device, and the load-bearing capacity value F can be seen on the display screen of the terminal device;

[0027] 6) Determine the magnitude of the bearing capacity. If the measured bearing capacity F is different from the initial bearing capacity F... 初 To compensate for the difference, adjust the drive bolt of the height-adjustable shim on the smart shim until the force reaches the initial load-bearing capacity F. 初 The principle behind the leveling process is as follows: k is a constant stiffness value, and x is displacement. It can be seen that when the force is the same, the deformation is the same, thus completing the leveling.

[0028] Use a Bluetooth device to check the load-bearing capacity of each shim in real time every once in a while. If the load-bearing capacity changes, adjust the shims to restore the load-bearing capacity to its original value to complete the leveling.

[0029] The beneficial effects of this invention are as follows: Compared with the prior art, this invention uses a hydraulic force measuring device composed of a hydraulic base, a hydraulic rod, and a pressure transmitter to detect the bearing capacity of the shim. The detection is stable, reliable, and accurate. The bearing capacity of the shim can be adjusted according to the detection value, thereby quickly achieving the balance adjustment of the equipment support. Attached Figure Description

[0030] Figure 1 A schematic diagram of the three-dimensional structure of the intelligent pad;

[0031] Figure 2 A second-view 3D structural diagram of the intelligent pad;

[0032] Figure 3 A three-dimensional structural diagram of the smart pad (with the protective cover removed);

[0033] Figure 4 A schematic diagram of the front structure of the intelligent pad;

[0034] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle AA section;

[0035] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of the middle BB section;

[0036] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the middle DD;

[0037] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure of the middle CC section;

[0038] Figure 9 This is a schematic diagram of the front view structure of the controller;

[0039] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure of the middle AA section;

[0040] Figure 11 for Figure 9 Schematic diagram of the cross-sectional structure of the middle BB section;

[0041] Figure 12 This is a schematic diagram of the circuit connection for a pressure transmitter;

[0042] Figure 13 This is a schematic diagram showing the connection between the circuit board and the battery. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] Example 1: As Figure 1-13 As shown, an intelligent shim includes a height-adjustable shim 1 and a hydraulic force measuring device 2. The bottom of the height-adjustable shim 1 is fixedly connected to the hydraulic force measuring device 2. The hydraulic force measuring device 2 includes a hydraulic rod 201, a hydraulic base 202, and a pressure transmitter 203. The hydraulic base 203 is provided with a hydraulic oil receiving cavity 204, and the top is provided with multiple evenly arranged through holes 205. A hydraulic rod 201 is arranged in each through hole 205. The outer end of the hydraulic rod 201 is fixedly connected to the bottom of the height-adjustable shim 1. The pressure transmitter 203 is also provided on the side of the hydraulic base 202. The pressure transmitter 203 is used to measure the pressure in the hydraulic oil receiving cavity. The pressure transmitter adopts a PT131 pressure transmitter. The hydraulic force measuring device composed of the hydraulic base, hydraulic rod, and pressure transmitter is used to detect the bearing capacity of the shim. The detection is stable, reliable, and accurate. The bearing capacity of the shim is adjusted according to the detection value, and the balance adjustment of the equipment support is quickly achieved.

[0045] The hydraulic support formed by the hydraulic rod and the hydraulic base will not affect the final balance accuracy of the equipment. On the contrary, it can improve the balance stability through rigid matching and pressure feedback mechanism. The compression of hydraulic oil is extremely small, and the overall rigidity is comparable to that of traditional shims. It will not cause the equipment support to shift due to elastic deformation. The slight elasticity of hydraulic oil can also play a role in shock absorption and buffering, reducing the transmission of vibration during equipment operation and avoiding damage to control devices installed on the shims. In addition, during the adjustment process, the pressure transmitter monitors the pressure change in real time, which can accurately compensate for the small errors caused by elastic deformation.

[0046] The hydraulic base is sealed with hydraulic oil. A detailed diagram of the hydraulic base and hydraulic rod is shown below. Figure 3 As shown. A pressure transmitter is a device that converts the pressure variable of a gas or liquid into a standard electrical signal for control and remote transmission. Its working principle is as follows: the pressure sensor (pressure transmitter) senses the pressure signal, and the pressure is converted into an electrical signal (resistance or capacitance change) through a sensitive element (such as a diaphragm or strain gauge). After amplification, correction and other processing, a standardized signal is output.

[0047] The height-adjustable shim 1 includes a lower connecting plate 101, a middle ramp drive plate 102, an upper ramp driven plate 103, and a drive screw 104. The bottom surface of the lower connecting plate 101 is fixedly connected to the outer ends of multiple hydraulic rods 201, and the bottom surface of the lower connecting plate 101 is fixedly connected to the hydraulic rods. The top surface of the upper ramp driven plate 103 is horizontal and is provided with an anti-slip rubber pad. The anti-slip rubber pad supports the support position of machine tools and other equipment. Machine tools generally use multiple shims to evenly distribute the support force. The top surface of the lower connecting plate 101 is provided with a first guide slider 105, and the bottom of the middle ramp drive plate 102 is provided with a first guide groove 106. 5. The middle slope driving plate 102 is embedded in the first guide groove 106 and can move relative to the first guide groove 106. The top surface of the middle slope driving plate 102 is provided with a first slope 107. The first slope 107 is provided with a second guide groove 108. The bottom of the upper slope driven plate 103 is provided with a second slope 109 that fits with the first slope 107. The bottom of the second slope 109 is provided with a second guide slider 110. The second guide slider 110 is embedded in the second guide groove 108 and can move relative to the second guide groove 108. The driving screw 104 is rotatably connected to the higher side of the middle slope driving plate 102, and the other end is helically rotatably connected to the connecting post 111. The connecting post 111 is movably embedded at both ends into the first guide limiting hole 112 and the second guide limiting hole 113, respectively. The middle sloping drive plate 102 is provided with a strip-shaped first cavity 114 with openings at both ends. The length direction of the strip-shaped first cavity 114 is parallel to the drive screw 10. The first guide limiting hole 112 is located at the top of the lower connecting plate 101 directly opposite the bottom of the first cavity 114. The bottom of the upper sloping driven plate 103 is provided with a second cavity 115. The side wall of the second cavity 115 directly opposite the inner end of the drive screw 10 is provided with a clearance through hole 116 that can pass through the inner end of the drive screw. The top of the second cavity 115 is provided with a second guide limiting hole 11. 3. The rotating drive screw 104 can drive the middle slope drive plate 102 to move relative to the upper slope driven plate 103, raising the upper slope driven plate 103. Under the action of the positioning guide structure and the drive screw, the height of the adjustable shim can be directionally raised to achieve the bearing capacity required for balance. The first guide groove and the first guide slider arranged on both sides, together with the second guide groove and the second guide slider, can ensure that the middle slope drive plate 102 moves directionally. The height of the connecting column can ensure that when the maximum height is adjusted, its two ends will not disengage from the first guide limiting hole 112 and the second guide limiting hole 113.

[0048] The drive screw of the height-adjustable shim uses a metric fine thread, specification M12, with a pitch of 1.25mm. The surface is treated with rust prevention to meet the self-locking adjustment requirements. The friction angle φ = arctan(μ). In unlubricated steel-to-steel contact, μ is typically taken as 0.1, so φ = arctan(0.1) ≈ 5.7°. The helix angle of this drive screw is 2.1°, and 2.1° < 5.7°, meeting the self-locking condition and ensuring high reliability. The inclination angle between the upper ramp driven plate and the middle ramp drive plate is 10°. This is because a 10° inclination angle allows for a height change of approximately 0.176mm for every 1mm screw displacement. It also provides sufficiently high adjustment efficiency (better than 8°) while maintaining good adjustment accuracy (worse than 8° but far better than 12°), enabling workers to operate quickly and accurately on-site.

[0049] The pressure transmitter 203 is connected to the controller 3. The controller 3 is connected to the terminal devices and the cloud server via a wireless module, which includes a Bluetooth module and a WiFi module. Both the Bluetooth module and the WiFi module are connected to the controller 3. The terminal devices include tablets, mobile phones and workshop SCADA systems, enabling "instant connection and viewing". At the same time, the data can be automatically uploaded to the cloud for easy viewing of historical data. Specifically, controller 3 is mounted on circuit board 4, which is fixedly connected to protective shell 5. Protective shell 5 is fixedly connected to the side of hydraulic base 202. Circuit board 4 uses Arduino Nano 33 IoT development board. Arduino Nano 33 IoT development board is a miniature development board designed specifically for the Internet of Things (IoT). It is based on ARM Cortex-M0+ 32-bit SAMD21G18A processor (with a main frequency of up to 48 MHz), integrates u-blox NINA-W102 module supporting Wi-Fi 802.11 b / g / n and Bluetooth 4.2, and LSM6DS3 six-axis inertial measurement unit (IMU) (including 3-axis accelerometer and 3-axis gyroscope). It is also equipped with ATECC608A encryption chip to ensure secure communication. The battery is a 12V 6800mAh unit. Battery 7 and the Arduino Nano 33 IoT development board are housed in protective case 5. Protective case 5 has four holes on its exterior: two charging ports 9 for the lower battery, an output signal port 10 for the pressure transmitter, and a power supply port 11 for the pressure transmitter. Figure 12-13 As shown in the diagram, the protective cover 8 is installed on the side of the hydraulic base to protect the hydraulic force measuring device and the protective shell 5. An end cap 6 is provided at the front end of the protective cover 8, and the end cap 6 is connected to the protective cover 8 by bolts. When maintenance is required, the end cap 6 can be easily removed to maintain the internal components of the hydraulic force measuring device. The battery 7 is fixedly installed at the bottom inside the protective shell 5.

[0050] Example 2: A method for using a smart pad, the method comprising the following steps:

[0051] 1) Calculate the load-bearing capacity at the location of each smart pad based on the machine tool weight theory. Assuming there are N pads, the load-bearing capacity F of each smart pad is... 初 =M / N, where M is the weight of the machine tool; for example, if four smart pads are evenly distributed, the bearing capacity of each foot is one-quarter of the weight of the machine tool.

[0052] 2) Place multiple smart pads under the required support position of the machine tool;

[0053] 3) The height-adjustable intelligent shim is affected by the weight of the machine tool, causing the four hydraulic rods of the hydraulic force measuring device to move downwards, thereby changing the pressure inside the hydraulic base. The pressure is measured by a pressure transmitter, and the output signal of the pressure transmitter is linearly related to the input pressure. The general formula is: (1)

[0054] In the formula, To measure the actual pressure, / This refers to the lower / upper limit of the measurement range. / This refers to the lower / upper limit of the output signal;

[0055] 4) The current signal from the pressure transmitter is transmitted to the analog signal port connected to the controller, converting the analog current signal into a digital signal. Based on the relationship between pressure and current (1), the pressure magnitude is obtained. Then, based on the diameter D of the hydraulic rod, according to the relationship:

[0056] (2)

[0057] Where F is the load-bearing capacity of the smart pad;

[0058] The bearing capacity value is obtained according to formula (2);

[0059] 5) After obtaining the load-bearing capacity value, use the wireless module (Bluetooth module) to transmit the load-bearing capacity value to the terminal device. The load-bearing capacity value F can be seen on the display screen of the terminal device. The Wi-Fi module in the Arduino Nano 33 IoT development board wirelessly transmits the load-bearing capacity data to mobile phones, tablets or workshop SCADA systems, realizing "instant connection and viewing". At the same time, the data can be automatically uploaded to the cloud for easy viewing of historical data.

[0060] 6) Determine the magnitude of the bearing capacity. If the measured bearing capacity F is different from the initial bearing capacity F... 初If the difference between the applied force and the initial load (e.g., for four shims, the initial required force is one-quarter of the machine tool's weight) exceeds the set threshold, such as 0.001N, then the drive bolts of the height-adjustable shims on the smart shims will be adjusted until the force reaches the initial load-bearing capacity F. 初 The principle behind the leveling process is as follows: k is a constant stiffness value, and x is displacement. It can be seen that when the force is the same, the deformation is the same, thus completing the leveling.

[0061] Subsequently, due to the existence of foundation settlement, the load-bearing capacity of each shim was checked in real time using a Bluetooth device every once in a while. If the load-bearing capacity changed, the shims were adjusted to restore the load-bearing capacity to its original value to complete the leveling.

[0062] If charging is required, simply remove end cover 6 to charge the charging port 9. A full charge lasts approximately 30 days. Maintenance is also performed by removing end cover 6.

[0063] The goal of leveling a machine tool is to ensure that the projection of its center of gravity onto the support surface is evenly distributed, thereby ensuring that the machine tool remains stable during machining.

[0064] Uniform pressure means that when the force (pressure) on all the support blocks is equal, it indicates that the weight of the machine tool is evenly distributed across all support points. At this time, the center of gravity of the machine tool coincides with the geometric center of the support surface, and the machine tool is in a state of mechanical equilibrium.

[0065] Consequences of mechanical imbalance: If the pressure at a certain point is too high or too low, it indicates that the machine tool is tilted in that direction. For example: If the pressure on a certain shim is too high, the machine tool may tilt in that direction, causing that support point to bear more weight. If the pressure on a certain shim is too low or it comes loose, the machine tool may "sink" in that direction, and the support surface cannot effectively bear the weight, resulting in vibration or decreased accuracy.

[0066] The Relationship Between Geometric Levelness and Uniform Pressure: The levelness of a machine tool is a geometric concept, requiring that the machining surfaces (such as the worktable and spindle) be perpendicular to the direction of gravity. Uniform pressure is an indirect manifestation of levelness: When the pressure from the shims is uniform, the machine tool's support surface remains parallel to the ground (or foundation), and the machine tool as a whole is level. Only then can the geometric levelness of the machining surface meet the requirements. Tilting Caused by Uneven Pressure: If the pressure from the shims is uneven, the machine tool will tilt towards the direction of greater pressure, causing angular deviations in the machining surface and affecting machining accuracy.

[0067] If the observed load-bearing capacity is less or greater than the initially required force for this location (for example, with four shims, the initially required force is one-quarter of the machine tool's weight), adjust the bolts of the three layers of shims on the intelligent shims accordingly until the force is the initially required force. This completes the leveling process, and the principle is as follows: Here, k is the stiffness constant, and x is the displacement. This shows that when the force is consistent, the deformation is the same, thus achieving leveling. Therefore, ensuring uniform pressure on the shims is crucial for achieving horizontal leveling. Hence, a shim that can display its load-bearing capacity is needed.

[0068] In addition, use smart shims to adjust the load of all support points to the design value position at once. Select 2-3 "critical reference shims" (generally placed at both ends of the bed or guide rail, near the machining area) and re-measure their levelness with a level / laser. If these 2-3 points are completely level and the load is correct, the remaining shims will naturally meet the levelness tolerance due to the rigid coupling of the structure. If they are still out of tolerance, only these 2-3 points need to be finely adjusted by "micro-lifting and micro-lowering," while keeping the load on the remaining shims unchanged. Finally, randomly check 1-2 non-reference points to confirm that the deviation is within the allowable range. This ensures accuracy while avoiding the time and cost waste of high-precision measurement of all shims one by one.

[0069] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in the following five aspects:

[0070] 1. Compact structure and well-matched stiffness

[0071] By combining the hydraulic force measuring component with three layers of height-adjustable pads, the original shape, size and load-bearing rigidity of the pads can be changed, and the existing machine tool pads can be directly replaced without modifying the foundation or equipment base.

[0072] 2. High measurement accuracy and low temperature drift.

[0073] The hydraulic-pressure transmitter solution replaces the strain gauge, providing a strong output signal, good linearity, and high temperature stability. It avoids the system complexity and error accumulation caused by weak signal amplification and temperature compensation, and can achieve long-term measurement accuracy within ±0.5%FS. The hydraulic support also plays a role in vibration reduction.

[0074] 3. Wireless transmission and multi-terminal display

[0075] The circuit board uses the Arduino Nano 33 IoT development board, which supports both Wi-Fi and Bluetooth protocols. It can wirelessly transmit the real-time load-bearing capacity of each support point to a mobile phone, tablet, or workshop SCADA system, enabling "instant connection and viewing". At the same time, the data can be automatically uploaded to the cloud for easy historical traceability and big data analysis.

[0076] 4. Installation and leveling efficiency is significantly improved.

[0077] On-site personnel can read the stress value of each shim in real time through a mobile terminal, and adjust the bolts precisely according to the value to complete the leveling in one go. This avoids the inefficient process of repeated trial and error with the traditional "level instrument + experience". It can be operated by a single person and the installation time can be shortened by more than 50%.

[0078] 5. Long-term maintenance-free and easy to maintain

[0079] The battery is a 12V 6800 mAh lithium battery that can work continuously for about 30 days on a single charge; the modular protective shell design allows for quick charging or battery replacement and hydraulic component maintenance by unscrewing the end cap, greatly reducing maintenance workload and downtime.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A smart pad, characterized in that, It includes a height-adjustable shim and a hydraulic force measuring device. The bottom of the height-adjustable shim is fixedly connected to the hydraulic force measuring device. The hydraulic force measuring device includes a hydraulic rod, a hydraulic base, and a pressure transmitter. The hydraulic base is provided with a hydraulic oil receiving cavity and multiple evenly arranged through holes on the top. A hydraulic rod is arranged in each through hole. The outer end of the hydraulic rod is connected to the bottom of the height-adjustable shim. A pressure transmitter is also provided on the side of the hydraulic base. The pressure transmitter is used to measure the pressure in the hydraulic oil receiving cavity.

2. The intelligent leveling pad according to claim 1, characterized in that, The height-adjustable pad includes a lower connecting plate, a middle ramp drive plate, an upper ramp driven plate, and a drive screw. The bottom surface of the lower connecting plate is fixedly connected to the outer ends of multiple hydraulic rods. A first guide slider is provided on the top surface of the lower connecting plate. A first guide groove is provided on the bottom of the middle ramp drive plate. The first guide slider is embedded in the first guide groove and can move relative to the first guide groove. A first ramp is provided on the top surface of the middle ramp drive plate. A second guide groove is provided on the first ramp. A second ramp that fits against the first ramp is provided on the bottom of the upper ramp driven plate. A second guide slider is provided on the bottom of the second ramp. The second guide slider is embedded in the second... The guide slide can move relative to the second guide slide. The drive screw is rotatably connected to the higher side of the middle slope drive plate, and the other end is helically connected to the connecting column. The two ends of the connecting column are respectively movably embedded into the first guide limiting hole and the second guide limiting hole. The middle slope drive plate is provided with a strip-shaped first cavity with openings at the top and bottom. The first guide limiting hole is located at the top of the lower connecting plate directly opposite the bottom of the first cavity. The bottom of the upper slope driven plate is provided with a second cavity. The top of the second cavity is provided with a second guide limiting hole. Rotating the drive screw can drive the middle slope drive plate to move relative to the upper slope driven plate and raise the upper slope driven plate.

3. The intelligent leveling pad according to claim 1, characterized in that, The pressure transmitter is connected to the controller, which in turn connects to the terminal device and cloud server via a wireless module.

4. The intelligent leveling pad according to claim 1, characterized in that, The controller is mounted on a circuit board, which is fixedly connected to a protective housing, which in turn is fixedly connected to the side of the hydraulic base.

5. The method of using a smart pad according to claim 3, characterized in that, The method includes the following steps: 1) Calculate the load-bearing capacity at the location of each smart pad based on the machine tool weight theory. Assuming there are N pads, the load-bearing capacity F of each smart pad is... 初 =M / N, where M is the weight of the machine tool; 2) Place multiple smart pads under the required support position of the machine tool; 3) The height-adjustable intelligent shim is affected by the weight of the machine tool, causing the four hydraulic rods of the hydraulic force measuring device to move downwards, thereby changing the pressure inside the hydraulic base. The pressure is measured by a pressure transmitter, and the output signal of the pressure transmitter is linearly related to the input pressure. The general formula is: (1)， In the formula, To measure the actual pressure, / This refers to the lower / upper limit of the measurement range. / This refers to the lower / upper limit of the output signal; 4) The current signal from the pressure transmitter is transmitted to the analog signal port connected to the controller, converting the analog current signal into a digital signal. Based on the relationship between pressure and current (1), the pressure magnitude is obtained. Then, based on the diameter D of the hydraulic rod, according to the relationship: (2)， Where F is the load-bearing capacity of the smart pad; The bearing capacity value is obtained according to formula (2); 5) After obtaining the load-bearing capacity value, use the wireless module to transmit the load-bearing capacity value to the terminal device, and the load-bearing capacity value F can be seen on the display screen of the terminal device; 6) Determine the magnitude of the bearing capacity. If the measured bearing capacity F is different from the initial bearing capacity F... 初 To compensate for the difference, adjust the drive bolt of the height-adjustable shim on the smart shim until the force reaches the initial load-bearing capacity F. 初 The leveling process is now complete.

6. The intelligent pad according to claim 5, characterized in that, Use a Bluetooth device to check the load-bearing capacity of each shim in real time every once in a while. If the load-bearing capacity changes, adjust the shims to restore the load-bearing capacity to its original value to complete the leveling.

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