Leveling structure and leveling method of numerical control machine tool

Abstract

The application provides a numerical control machine tool leveling structure and a leveling method. The numerical control machine tool leveling structure comprises a first displacement sensor (1), a second displacement sensor (2), a support column (3), a base (4) and a leveling device, the support column (3) is configured to support the numerical control machine tool, the support column (3) is arranged on the base (4), the leveling device is arranged on the base (4) and is configured to be capable of adjusting the height of the support column (3), the first displacement sensor (1) is arranged on the support column (3), and the second displacement sensor (2) is arranged on the base (4). According to the numerical control machine tool leveling structure, the cause of the precision deviation of the numerical control machine tool can be detected in time and accurately, the numerical control machine tool can be leveled, and the machining precision of the machine tool is ensured.

Description

Technical Field

[0001] This invention relates to the field of machine tool leveling technology, and more specifically, to a leveling structure and method for CNC machine tools. Background Technology

[0002] With the rapid development of domestic manufacturing technology and the continuous expansion of market size, the demand for CNC machine tools required for production and processing is also constantly expanding. At present, CNC machine tools have been widely used in the fields of automobiles, molds, aerospace, and military industry.

[0003] CNC machine tools generate vibrations during use, which can affect their levelness. Furthermore, CNC machine tools often have long service lives. Due to their large size, heavy weight, and inconvenient movement, their placement is usually fixed. Therefore, the accuracy of CNC machine tools is easily affected by vibrations and environmental changes. For example, during machining, prolonged machining sessions may cause machine tool vibrations, leading to changes in accuracy. Additionally, over time, deformation of the supporting ground may cause the CNC machine tool to shift its position, resulting in levelness and affecting machining accuracy. Often, such changes in the supporting environment are not easily detected, leading to accuracy deviations that are difficult to pinpoint. Summary of the Invention

[0004] The main objective of this invention is to provide a leveling structure and method for CNC machine tools, which can detect the causes of CNC machine tool accuracy deviations in a timely and accurate manner, and level the CNC machine tool to ensure the machining accuracy of the machine tool.

[0005] To achieve the above objectives, according to one aspect of the present invention, a CNC machine tool leveling structure is provided, comprising a first displacement sensor, a second displacement sensor, a support column, a base, and a leveling device. The support column is configured to support the CNC machine tool and is disposed on the base. The leveling device is disposed on the base and configured to adjust the height of the support column. The first displacement sensor is disposed on the support column, and the second displacement sensor is disposed on the base.

[0006] Furthermore, there are four support columns, which are configured to support the four corners of the CNC machine tool. There are also four bases, with one support column installed on each base. Each support column is equipped with at least one first displacement sensor, and each base is equipped with at least one second displacement sensor.

[0007] Furthermore, the leveling device includes an adjusting pad and an adjusting rod. The support column is supported on the adjusting pad, and the supporting surface of the adjusting pad and the bottom surface of the support column form a matching inclined plane. The adjusting rod is connected to the adjusting pad and adjusts the supporting position of the adjusting pad relative to the support column to adjust the supporting height of the support column.

[0008] Furthermore, the base has a bottom plate, a side plate, and a top cover. The bottom plate, side plate, and top cover form an installation cavity. An adjusting pad is set inside the installation cavity. An adjusting rod passes through the side plate and is screwed to the adjusting pad. An axial limit is formed between the adjusting rod and the side plate. The adjusting rod can rotate relative to the side plate. A limit hole is provided on the top cover. A support column passes through the limit hole and is supported on the adjusting pad.

[0009] Furthermore, the top cover includes an upper cover plate and a limiting cover plate. The upper cover plate is detachably fixedly connected to the side plate, and the limiting cover plate is fixedly connected to the upper cover plate. A limiting hole is provided on the limiting cover plate.

[0010] Furthermore, a bearing chamber is provided on the side plate, and a bearing is installed in the bearing chamber. A bushing is fitted on the adjusting rod and installed inside the bearing. A stop flange is provided at the end of the bushing and stops outside the bearing.

[0011] Furthermore, the base has a bottom plate, a side plate, and a top cover, which together form an installation cavity. An adjusting pad is placed inside the installation cavity. An adjusting rod passes through the side plate and is fixedly connected to the adjusting pad. A bearing chamber is provided on the side plate, and a bearing is provided inside the bearing chamber. A bushing is fitted onto the adjusting rod, and the bushing is installed inside the bearing. The portion of the adjusting rod that extends into the installation cavity has an external thread, and a nut is fitted onto the external thread. The nut is configured to adjust the length of the adjusting rod extending into the installation cavity.

[0012] Furthermore, a support protrusion is provided on the base plate, and the adjusting pad is supported on the support protrusion and can slide along the support protrusion. An avoidance groove is provided on the support protrusion, which is located in the sliding area of ​​the adjusting pad and extends along the sliding direction of the adjusting pad.

[0013] According to another aspect of the present invention, a leveling method for the above-described CNC machine tool leveling structure is provided, comprising:

[0014] Detect whether the supporting columns have experienced vertical displacement;

[0015] Check if the base has experienced vertical displacement;

[0016] When vertical displacement is detected only in the support column, it is determined that the displacement is caused by machine tool vibration.

[0017] When vertical displacement of the base is detected, it is determined that the displacement is caused by a change in the surrounding environment of the machine tool.

[0018] The supporting columns are leveled using a leveling device based on the test results.

[0019] Furthermore, when a vertical displacement of the base is detected, the steps to determine whether the displacement is due to a change in the machine tool's surrounding environment include:

[0020] Determine whether the displacement values ​​of the supporting column and the base are consistent;

[0021] When the displacement values ​​of the support column and the base are the same, it is determined that the displacement is caused only by the change in the surrounding environment of the machine tool.

[0022] When the displacement values ​​of the support column and the base are inconsistent, it is determined that the displacement is caused by the changes in the surrounding environment of the machine tool and the vibration of the machine tool.

[0023] Furthermore, the step of detecting whether the supporting column has undergone vertical displacement also includes:

[0024] Four first displacement sensors are installed at the same height position on the four supporting columns, and the height position of the first displacement sensors is set to zero at this time.

[0025] Four second displacement sensors are installed at the same height on the four bases, and the height of the second displacement sensors is set to zero at this time.

[0026] The CNC machine tool leveling structure, applying the technical solution of this invention, includes a first displacement sensor, a second displacement sensor, a support column, a base, and a leveling device. The support column is configured to support the CNC machine tool and is mounted on the base. The leveling device is mounted on the base and configured to adjust the height of the support column. The first displacement sensor is mounted on the support column, and the second displacement sensor is mounted on the base. This CNC machine tool leveling structure, by setting the first displacement sensor on the support column and the second displacement sensor on the base, along with the leveling device on the base, allows for the detection of displacement of the support column using the first displacement sensor and the displacement of the base using the second displacement sensor. This enables precise monitoring of the horizontal position of the CNC machine tool, accurate identification of the root cause of displacement, and improved accuracy and reliability of displacement assessment. After determining the displacement of the CNC machine tool, the support height of the corresponding support column can be adjusted using the leveling device, facilitating the leveling of the CNC machine tool and ensuring its working accuracy. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 A three-dimensional structural schematic diagram of the CNC machine tool leveling structure according to an embodiment of the present invention is shown;

[0029] Figure 2 A schematic diagram of the CNC machine tool leveling structure according to an embodiment of the present invention is shown;

[0030] Figure 3 A schematic diagram of a support structure of a CNC machine tool leveling structure according to an embodiment of the present invention is shown;

[0031] Figure 4 It shows Figure 3 A schematic diagram of the AA-direction cross-section structure;

[0032] Figure 5 This diagram shows a top view of a support structure of a CNC machine tool leveling structure according to an embodiment of the present invention.

[0033] Figure 6 It shows Figure 5 A schematic diagram of the BB-direction cross-section; and

[0034] Figure 7 A flowchart illustrating the leveling method of the CNC machine tool leveling structure according to an embodiment of the present invention is shown.

[0035] The above figures include the following reference numerals:

[0036] 1. First displacement sensor; 2. Second displacement sensor; 3. Support column; 4. Base; 5. Adjusting pad; 6. Adjusting rod; 7. Base plate; 8. Side plate; 9. Top cover plate; 10. Limiting cover plate; 11. Limiting hole; 12. Bearing chamber; 13. Bearing; 14. Bushing; 15. Nut; 16. Support protrusion; 17. Clearance groove; 18. Online monitor; 19. Grounding bolt; 20. CNC machine tool. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] See also Figures 1 to 6 As shown, according to an embodiment of the present invention, the CNC machine tool leveling structure includes a first displacement sensor 1, a second displacement sensor 2, a support column 3, a base 4, and a leveling device. The support column 3 is configured to support the CNC machine tool and is disposed on the base 4. The leveling device is disposed on the base 4 and is configured to adjust the height of the support column 3. The first displacement sensor 1 is disposed on the support column 3 and the second displacement sensor 2 is disposed on the base 4.

[0039] The CNC machine tool leveling structure is equipped with a first displacement sensor 1 on the support column 3 and a second displacement sensor 2 on the base 4. A leveling device is also installed on the base 4. The first displacement sensor 1 detects the displacement of the support column 3, and the second displacement sensor 2 detects the displacement of the base 4. This allows for precise monitoring of the horizontal position of the CNC machine tool 20, accurate identification of the root cause of displacement, and improved accuracy and reliability of displacement detection. After determining the displacement of the CNC machine tool 20, the support height of the corresponding support column 3 can be adjusted using the leveling device, facilitating leveling of the CNC machine tool 20 and ensuring its working accuracy.

[0040] In this embodiment, to facilitate real-time acquisition of relevant detection information, the CNC machine tool leveling structure also includes an online monitor 18. The online monitor 18 is communicatively connected to the first displacement sensor 1 and the second displacement sensor 2, thereby acquiring the detection information of the first displacement sensor 1 and the second displacement sensor 2 in real time, and performing monitoring and alerts. The online monitor 18 has a display screen that can display the detection information of the first displacement sensor 1 and the second displacement sensor 2 in real time. It can also process the detection information of the first displacement sensor 1 and the second displacement sensor 2 to determine the displacement status of the CNC machine tool 20. When the displacement of the CNC machine tool 20 reaches the set requirements, an alert message is issued, and the position and value of the displacement are displayed on the screen. The alert message can be an audible and visual alarm or a text message. The online monitor 18 can connect to a terminal and send the monitoring information to the terminal so that the terminal can obtain the information in a timely manner and handle the relevant situation. The terminal can be a server or a mobile terminal, such as a mobile phone or tablet computer.

[0041] The online monitor 18 can communicate with the first displacement sensor 1 and the second displacement sensor 2 via wire connection or via wireless connection, such as Bluetooth connection, infrared connection or WIFI connection.

[0042] By using the above method, the displacement information of the CNC machine tool 20 can be obtained in real time, and the CNC machine tool 20 can be leveled in a timely manner when the displacement of the CNC machine tool reaches the set value, so as to always keep the working accuracy of the CNC machine tool 20 within the required range and ensure the working reliability of the CNC machine tool 20.

[0043] In one embodiment, there are four support columns 3, which are configured to support the four corners of the CNC machine tool. There are also four bases 4, with one support column 3 installed on each base 4. At least one first displacement sensor 1 is provided on each support column 3, and at least one second displacement sensor 2 is provided on each base 4.

[0044] In this embodiment, four support columns 3 are arranged at the four corners of the CNC machine tool 20, which can provide stable and effective support for the CNC machine tool 20. At least one first displacement sensor 1 is provided on each support column 3, which can detect the displacement of each CNC machine tool 20, thereby more accurately determining the location of the displacement and making a more precise judgment on the displacement status of the CNC machine tool 20.

[0045] Four bases 4 are set at the bottom of the support column 3 to support the support column 3, providing stable and effective support for the CNC machine tool 20. At least one second displacement sensor 2 is installed on each base 4 to detect the displacement of each base 4, thereby more accurately determining the location of the displacement and making a more precise judgment on the displacement status of the CNC machine tool 20.

[0046] In this embodiment, the first displacement sensor 1 mounted on the support column 3 and the second displacement sensor mounted on the base 4 serve different purposes. The first displacement sensor 1 is mainly used to detect the displacement of the support column 3, thereby determining whether the displacement of the CNC machine tool 20 is caused by the vibration of the CNC machine tool 20. The second displacement sensor 2 is mainly used to detect the displacement of the base 4, thereby determining whether the displacement of the CNC machine tool 20 is caused by changes in the surrounding environment of the CNC machine tool 20. Through this method, the causes of the displacement of the CNC machine tool 20 can be more precisely classified and differentiated using the first displacement sensor 1 and the second displacement sensor 2, thus more accurately determining the cause of the displacement of the CNC machine tool 20. This allows for more targeted adjustments to the displacement of the CNC machine tool 20, or targeted measures to prevent further displacement of the CNC machine tool 20.

[0047] In one embodiment, the leveling device includes an adjusting pad 5 and an adjusting rod 6. The support column 3 is supported on the adjusting pad 5. The supporting surface of the adjusting pad 5 and the bottom surface of the support column 3 form a matching inclined surface. The adjusting rod 6 is connected to the adjusting pad 5 and adjusts the supporting position of the adjusting pad 5 relative to the support column 3 to adjust the supporting height of the support column 3.

[0048] In this embodiment, the supporting plane of the adjusting pad 5 is an inclined plane, and the bottom surface of the supporting column 3 is an inclined plane that matches the supporting plane of the adjusting pad 5. That is, the inclination angle of the supporting plane of the adjusting pad 5 and the inclined plane of the supporting column 3 are the same. After the two are matched, it can be ensured that the top supporting surface of the supporting column 3 remains horizontal. The inclined plane of the adjusting pad 5 and the bottom surface of the supporting column 3 form an inclined fit, and the support height of the supporting column 3 can be adjusted by adjusting their relative positions. Thus, when the CNC machine tool 20 moves, the displacement of the CNC machine tool 20 can be adjusted. The inclined plane fit adjustment method can realize stepless continuous adjustment of the displacement of the CNC machine tool 20, with higher adjustment accuracy, and can achieve precise adjustment of the displacement of the CNC machine tool 20.

[0049] The adjusting rod 6 is connected to the adjusting pad 5, and the adjusting end of the adjusting rod 6 extends out of the base 4. Therefore, it is convenient to use the adjusting rod 6 to transmit the adjusting action to the adjusting pad 5 so as to adjust the position of the adjusting pad 5. Since the adjusting end of the adjusting rod 6 extends out of the base 4, it is convenient to operate the adjusting rod 6 from outside the base 4, which reduces the difficulty of operation, improves the efficiency of operation, and reduces the structural cost.

[0050] The adjusting rod 6 can adjust the adjusting pad 5 in various ways. For example, the adjusting rod 6 and the adjusting pad 5 can be fixedly connected. The adjustment pad 5 can be moved by adjusting the displacement of the adjusting rod 6, thereby realizing the displacement adjustment of the adjusting pad 5. The adjusting rod 6 and the adjusting pad 5 can also be connected by screws. Then, the adjusting rod 6 can be installed on the base 4 by axial limiting and circumferential rotation, thereby converting the rotation of the adjusting rod 6 into the linear motion of the adjusting pad 5, thus realizing the displacement adjustment of the adjusting pad 5.

[0051] In one embodiment, the base 4 has a base plate 7, a side plate 8, and a top cover. The base plate 7, the side plate 8, and the top cover form an installation cavity. An adjusting pad 5 is disposed in the installation cavity. An adjusting rod 6 passes through the side plate 8 and is screwed to the adjusting pad 5. An axial limit is formed between the adjusting rod 6 and the side plate 8. The adjusting rod 6 can rotate relative to the side plate 8. A limit hole 11 is provided on the top cover. A support column 3 passes through the limit hole 11 and is supported on the adjusting pad 5.

[0052] In this embodiment, the base plate 7 and side plate 8 of the base 4 are an integral structure, forming a cavity structure with an upper opening. The top cover is placed at the opening. The support column 3 passes through the limiting hole 11 on the top cover and is supported on the adjusting pad 5. It is limited by the limiting hole 11 to prevent the support column 3 from displacing under gravity and to improve the stability of the support structure of the support column 3. The adjusting rod 6 passes through the side plate 8 and is screwed to the adjusting pad 5. The adjusting rod 6 and the side plate 8 form an axial limit, and the adjusting rod 6 can rotate relative to the side plate 8, so that the adjusting rod 6 will not have axial displacement during rotation. Under the pressure of the support column 3 and the support of the base plate 7, the adjusting pad 5 cannot rotate with the adjusting rod 6. Therefore, under the action of the threaded engagement, the rotation of the adjusting rod 6 is converted into its own linear motion, realizing the position adjustment of the adjusting pad 5.

[0053] In one embodiment, the top cover includes an upper cover plate 9 and a limiting cover plate 10. The upper cover plate 9 is detachably fixedly connected to the side plate 8, and the limiting cover plate 10 is fixedly connected to the upper cover plate 9. A limiting hole 11 is provided on the limiting cover plate 10.

[0054] In this embodiment, the upper cover plate 9 itself is relatively thin, so it is prone to deformation under stress when subjected to the lateral force of the support column 3, which leads to the inability to effectively limit the support column 3. By fixing a relatively thick limiting cover plate 10 on the upper cover plate 9, the overall thickness at the position where it mates with the support column 3 can be increased. While saving costs, the structural strength at the position where it mates with the support column 3 is guaranteed, thereby ensuring the working reliability of the top cover.

[0055] In one embodiment, a bearing chamber 12 is provided on the side plate 8, a bearing 13 is provided in the bearing chamber 12, a bushing 14 is sleeved on the adjusting rod 6, the bushing 14 is installed in the bearing 13, and a stop flange is provided at the end of the bushing 14, the stop flange stops outside the bearing 13.

[0056] In this embodiment, the side plate 8 is relatively thick, providing sufficient space for a bearing chamber 12. The adjusting rod 6 passes through the side plate 8 via a bearing housed within the bearing chamber 12, reducing friction during rotation and making displacement adjustment of the adjusting pad 5 easier and more effortless. A bushing 14 is provided outside the adjusting rod 6 to protect it and extend its service life.

[0057] A stop flange is provided at the end of the bushing 14, and the stop flange stops outside the bearing 13. The adjustment rod 6 can be used to pull the adjustment shim 5 to adjust the displacement of the adjustment shim 5. At the same time, when the adjustment rod 6 receives the reverse force of the adjustment shim 5, since the stop flange stops outside the bearing 13, and the bearing 13 stops on the inner wall of the bearing chamber, it can overcome the reverse force of the adjustment shim 5, so that the adjustment rod 6 can be stably kept in the adjustment position, and thus the adjustment shim 5 can be stably kept in the adjustment position.

[0058] In one embodiment, the base 4 has a base plate 7, a side plate 8, and a top cover. The base plate 7, the side plate 8, and the top cover form an installation cavity. An adjusting pad 5 is disposed in the installation cavity. An adjusting rod 6 passes through the side plate 8 and is fixedly connected to the adjusting pad 5. A bearing chamber 12 is provided on the side plate 8. A bearing 13 is disposed in the bearing chamber 12. A bushing 14 is sleeved on the adjusting rod 6 and installed in the bearing 13. The portion of the adjusting rod 6 that extends into the installation cavity has an external thread. A nut 15 is sleeved on the external thread. The nut 15 is configured to adjust the length of the adjusting rod 6 extending into the installation cavity.

[0059] In this embodiment, the adjusting rod 6 is fixedly connected to the adjusting pad 5. Therefore, the adjusting rod 6 does not need to rotate relative to the side plate 8, but it does need to move axially relative to the side plate 8. Therefore, after adjusting the displacement of the adjusting rod 6, the adjusting position can be locked by using the nut 15 to achieve the displacement adjustment of the adjusting pad 5.

[0060] In one embodiment, a through hole can be made on the side plate 8, the adjusting rod 6 is located in the through hole and is fitted with the through hole with a clearance, and a nut 15 is provided on the part of the adjusting rod 6 located on the outside of the side plate 8. By rotating the nut 15, the displacement of the adjusting rod 6 can be adjusted, thereby adjusting the displacement of the adjusting pad 5.

[0061] In one embodiment, a support protrusion 16 is provided on the base plate 7, and the adjustment pad 5 is supported on the support protrusion 16 and can slide along the support protrusion 16. An avoidance groove 17 is provided on the support protrusion 16, the avoidance groove 17 is located in the sliding area of ​​the adjustment pad 5 and extends along the sliding direction of the adjustment pad 5.

[0062] In this embodiment, by providing support protrusions 16 on the base plate 7, the amount of material used in the base plate 7 can be reduced, and the contact area between the base plate 7 and the adjusting pad 5 can be reduced, thereby reducing sliding friction. By opening relief grooves 17 on the support protrusions 16, the contact area between the base plate 7 and the adjusting pad 5 can be further reduced, making the sliding friction of the adjusting pad 5 smaller and easier to adjust.

[0063] The clearance groove 17 can be set in the middle area of ​​the adjusting pad 5, which can not only support the supporting effect of the protrusion 16 on the adjusting pad 5, but also balance the sliding friction of the adjusting pad 5 from left to right, thus improving the force performance.

[0064] In one embodiment, a grounding bolt 19 is also provided at the bottom of the base 4. The base 4 is fixedly connected to the ground or support platform through the grounding bolt 19, thereby making the installation structure of the CNC machine tool 20 more stable.

[0065] See also Figure 7 As shown in the embodiment of the present invention, the leveling method of the above-mentioned CNC machine tool leveling structure includes:

[0066] Check whether the supporting column 3 has undergone vertical displacement;

[0067] Check whether the base 4 has experienced vertical displacement;

[0068] When vertical displacement is detected only in the support column 3, it is determined that the displacement is caused by machine tool vibration.

[0069] When vertical displacement of base 4 is detected, it is determined that the displacement is caused by changes in the surrounding environment of the machine tool.

[0070] Based on the test results, the support column 3 was leveled using a leveling device.

[0071] In this embodiment, the CNC machine tool leveling structure is equipped with a first displacement sensor 1 on the support column 3 and a second displacement sensor 2 on the base 4. A leveling device is also installed on the base 4. The first displacement sensor 1 can detect the displacement of the support column 3, and the second displacement sensor 2 can detect the displacement of the base 4. This allows for precise monitoring of the horizontal position of the CNC machine tool 20, accurate identification of the root cause of displacement, and improved accuracy and reliability of displacement detection. After determining the displacement of the CNC machine tool 20, the leveling device can be used to adjust the support height of the corresponding support column 3, facilitating leveling of the CNC machine tool 20 and ensuring its working accuracy.

[0072] In one embodiment, when a vertical displacement of the base 4 is detected, the step of determining that the displacement is caused by a change in the surrounding environment of the machine tool includes:

[0073] Determine whether the displacement values ​​of the supporting column 3 and the base 4 are consistent;

[0074] When the displacement values ​​of the support column 3 and the base 4 are the same, it is determined that the displacement is caused only by the change in the surrounding environment of the machine tool.

[0075] When the displacement values ​​of the support column 3 and the base 4 are inconsistent, it is determined that the displacement is caused by the change in the surrounding environment of the machine tool and the vibration of the machine tool.

[0076] In actual testing, when the CNC machine tool 20 shifts due to changes in the surrounding environment, the base 4 also shifts. Since the support column 3 is mounted on the base 4, its displacement also changes accordingly. However, the displacement of the support column 3 alone cannot determine whether the CNC machine tool 20 has shifted due to vibration. Therefore, further judgment is needed based on the displacements of the base 4 and the support column 3. When the displacement values ​​are the same, it indicates that the displacement of the support column 3 is entirely caused by the displacement of the base 4. Therefore, it can be determined that the CNC machine tool 20 has not shifted due to vibration, but rather due to changes in the surrounding environment. When the displacement values ​​are different, it indicates that the support column 3 has also shifted relative to the base 4. In other words, the CNC machine tool 20 has shifted not only due to changes in the surrounding environment but also due to vibration. This method allows for a more accurate determination of the displacement of the CNC machine tool 20.

[0077] In one embodiment, the step of detecting whether the support column 3 has undergone vertical displacement is further included before:

[0078] Four first displacement sensors 1 are installed at the same height position on four supporting columns 3, and the height position of the first displacement sensors 1 is set to zero at this time;

[0079] Four second displacement sensors 2 are installed at the same height position on four bases 4, and the height position of the second displacement sensors 2 is set to zero at this time.

[0080] In this embodiment, since the initial positions of both the first displacement sensor 1 and the second displacement sensor 2 are set to zero, the displacement of the CNC machine tool 20 can be determined more accurately during displacement detection. Furthermore, since the first displacement sensor 1 is installed on each of the four support columns 3 and the second displacement sensor 2 is installed on each of the four bases 4, when the height displacement of one support column 3 changes, the height displacement of the support columns 3 farther from the changed support column 3 will be smaller, or will not change. The height displacement of the two support columns 3 located between these two will also change. If the height displacement of only one support column 3 changes, while the height displacements of the other three support columns 3 do not change, it is necessary to determine whether the first displacement sensor 1 on that support column 3 is faulty and needs to be replaced. Similarly, when the height displacement of one base 4 changes, the accuracy of the data from the second displacement sensor 2 on that base 4 can also be determined using the above method.

[0081] When monitoring the displacement of the CNC machine tool 20, the first displacement sensor 1 should be installed at the same height on the four support columns 3, and the height position at this time should be recorded and set as zero point. At this time, the displacement of the four corners of the machine tool in the online monitor 18 is zero. Then, four second displacement sensors 2 are set at the base 4. During the machining process, the machine tool will inevitably vibrate, which will affect the level of the machine tool. Therefore, firstly, if the online monitor 18 shows a displacement change, it is determined whether the first displacement sensor 1 located at the support column 3 has displaced. If it has displaced, it is further determined whether the second displacement sensor 2 located at the base 4 has also displaced. If only the first displacement sensor 1 at the support column 3 has displaced, while the second displacement sensor 2 at the base 4 has not displaced, it means that this displacement is caused by the vibration of the machine tool. If the first displacement sensor 1 at the support column 3 displaces and the second displacement sensor 2 at the base 4 also displaces, it means that this displacement is caused by the change of the machine tool's position due to the change of the surrounding environment. It should be noted that the second displacement sensor 2 located at the base 4 has a higher priority, and the base 4 is connected to the ground. If the second displacement sensor 2 located at the base 4 shows a displacement change, it must be a position change caused by the change of the environment. After displacement occurs, the online position monitor 18 issues a warning and displays the location and value of the displacement. After determining the location and value, the machine tool position is adjusted by operating the corresponding adjustable support structure to return the machine tool to its original zero point, thus avoiding affecting the machining accuracy.

[0082] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0083] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A leveling structure for a CNC machine tool, characterized in that, The system includes a first displacement sensor (1), a second displacement sensor (2), a support column (3), a base (4), and a leveling device. The support column (3) is configured to support a CNC machine tool. The support column (3) is mounted on the base (4). The leveling device is mounted on the base (4) and configured to adjust the height of the support column (3). The first displacement sensor (1) is mounted on the support column (3) and configured to detect whether the support column (3) has a vertical displacement. The second displacement sensor (2) is mounted on the base (4) and configured to detect whether the base (4) has a vertical displacement. The CNC machine tool leveling structure is configured such that when only the support column (3) has a vertical displacement, it is determined that the displacement is caused by machine tool vibration; when the base (4) has a vertical displacement, it is determined that the displacement is caused by a change in the surrounding environment of the machine tool; and the support column (3) is leveled by the leveling device according to the detection results.

2. The CNC machine tool leveling structure according to claim 1, characterized in that, There are four support columns (3), which are configured to support the four corners of the CNC machine tool. There are four bases (4), each base (4) is equipped with one support column (3), each support column (3) is provided with at least one first displacement sensor (1), and each base (4) is provided with at least one second displacement sensor (2).

3. The CNC machine tool leveling structure according to claim 1 or 2, characterized in that, The leveling device includes an adjusting pad (5) and an adjusting rod (6). The supporting column (3) is supported on the adjusting pad (5). The supporting surface of the adjusting pad (5) and the bottom surface of the supporting column (3) form a matching inclined surface. The adjusting rod (6) is connected to the adjusting pad (5) and adjusts the supporting position of the adjusting pad (5) relative to the supporting column (3) to adjust the supporting height of the supporting column (3).

4. The CNC machine tool leveling structure according to claim 3, characterized in that, The base (4) has a base plate (7), a side plate (8) and a top cover. The base plate (7), the side plate (8) and the top cover form an installation cavity. The adjusting pad (5) is disposed in the installation cavity. The adjusting rod (6) passes through the side plate (8) and is screwed to the adjusting pad (5). The adjusting rod (6) and the side plate (8) form an axial limit. The adjusting rod (6) can rotate relative to the side plate (8). The top cover is provided with a limit hole (11). The supporting column (3) passes through the limit hole (11) and is supported on the adjusting pad (5).

5. The CNC machine tool leveling structure according to claim 4, characterized in that, The top cover includes an upper cover plate (9) and a limiting cover plate (10). The upper cover plate (9) is detachably fixedly connected to the side plate (8). The limiting cover plate (10) is fixedly connected to the upper cover plate (9). The limiting hole (11) is provided on the limiting cover plate (10).

6. The CNC machine tool leveling structure according to claim 4, characterized in that, The side plate (8) has a bearing chamber (12) and a bearing (13) is provided in the bearing chamber (12). The adjusting rod (6) is fitted with a bushing (14) and the bushing (14) is installed in the bearing (13). The end of the bushing (14) is provided with a stop flange and the stop flange stops outside the bearing (13).

7. The CNC machine tool leveling structure according to claim 3, characterized in that, The base (4) has a base plate (7), a side plate (8) and a top cover. The base plate (7), the side plate (8) and the top cover form an installation cavity. The adjusting pad (5) is disposed in the installation cavity. The adjusting rod (6) passes through the side plate (8) and is fixedly connected to the adjusting pad (5). A bearing chamber (12) is provided on the side plate (8). A bearing (13) is disposed in the bearing chamber (12). The adjusting rod (6) is fitted with a bushing (14). The bushing (14) is installed in the bearing (13). The part of the adjusting rod (6) that extends into the installation cavity has an external thread. A nut (15) is fitted on the external thread. The nut (15) is configured to adjust the length of the adjusting rod (6) extending into the installation cavity.

8. The CNC machine tool leveling structure according to any one of claims 4 to 7, characterized in that, The base plate (7) is provided with a support protrusion (16), the adjustment pad (5) is supported on the support protrusion (16) and can slide along the support protrusion (16), the support protrusion (16) is provided with a relief groove (17), the relief groove (17) is located in the sliding area of ​​the adjustment pad (5) and extends along the sliding direction of the adjustment pad (5).

9. A leveling method for a CNC machine tool leveling structure as described in any one of claims 1 to 8, characterized in that, The step of determining whether the vertical displacement of the base (4) is caused by a change in the surrounding environment of the machine tool when the vertical displacement is detected includes: Determine whether the displacement values ​​of the supporting column (3) and the base (4) are consistent; When the displacement values ​​of the support column (3) and the base (4) are the same, it is determined that the displacement is caused only by the change in the surrounding environment of the machine tool. When the displacement values ​​of the support column (3) and the base (4) are inconsistent, it is determined that the displacement is caused by the change in the surrounding environment of the machine tool and the vibration of the machine tool.

10. The leveling method according to claim 9, characterized in that, Before the step of detecting whether the support column (3) has undergone vertical displacement, the method further includes: Four first displacement sensors (1) are installed at the same height position on four support columns (3), and the height position of the first displacement sensors (1) is set to zero at this time; Four second displacement sensors (2) are installed at the same height position on four bases (4), and the height position of the second displacement sensors (2) is set to zero at this time.

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