Machine tool visual positioning system and machine tool with same

Abstract

The utility model provides a visual positioning system for a machine tool, which is used for detecting the position of a machined workpiece in the machining process of the machine tool and comprises a bracket assembly arranged on the machine tool and a detection assembly movably arranged on the bracket assembly, the detection assembly comprises a first detection unit and a second detection unit, wherein the first detection unit is arranged on the support assembly in a horizontally movable mode and used for detecting the position of a workpiece in the horizontal direction, and the second detection unit is arranged on the support assembly in a vertically movable mode and used for detecting the position of the workpiece in the vertical direction. The detection assembly is movably arranged on the support assembly, the first detection unit detects the position of a workpiece in the horizontal direction, the second detection unit detects the position of the workpiece in the vertical direction, and multi-dimensional position information is obtained through the visual detection technology, so that the problem that a single sensor cannot meet the omni-directional position detection requirement is solved. And the machining precision and efficiency are further influenced.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing technology, and in particular to a machine tool vision positioning system and a machine tool having the same. Background Technology

[0002] In modern manufacturing, the precision and efficiency of machine tool processing play a decisive role in product quality and production efficiency. Precise positioning of the workpiece during machine tool processing is a key step in ensuring machining accuracy, directly affecting important indicators such as the dimensional accuracy, shape accuracy, and surface quality of the final product.

[0003] Traditional machine tool workpiece positioning methods mostly employ mechanical positioning devices, such as locating pins and locating blocks. These devices rely on precise mechanical structures to define the workpiece position. However, this type of positioning method has many limitations. On the one hand, the mechanical structure is prone to wear and tear over long-term use, leading to a decrease in positioning accuracy. On the other hand, it lacks flexibility and is difficult to adapt to workpieces of different specifications and shapes. When changing workpieces, the positioning device needs to be readjusted, which is time-consuming and labor-intensive. In addition, some methods that use a single sensor for positioning detection can only obtain the position information of the workpiece in one direction, which cannot meet the needs of omnidirectional position detection of the workpiece in complex machining scenarios. This makes it difficult to effectively control machining errors, affecting product quality and production efficiency.

[0004] Therefore, developing a machine tool vision positioning system that can quickly, accurately, and flexibly detect the position of workpieces has become an urgent need to improve the machining performance of machine tools. Utility Model Content

[0005] The purpose of this invention is to provide a machine tool vision positioning system and a machine tool having the system, which can quickly, accurately and flexibly detect the position of a workpiece. By movably mounting the detection components on the support assembly, the first detection unit can move horizontally to detect the horizontal position of the workpiece, and the second detection unit can move vertically to detect the vertical position of the workpiece. By using vision detection technology to obtain multi-dimensional position information, this invention solves the problems of traditional mechanical positioning devices being prone to wear and tear leading to decreased accuracy, lacking flexibility to adapt to different workpieces, and the inability of a single sensor to meet the requirements of all-round position detection, thus affecting processing accuracy and efficiency.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] This utility model provides a machine tool vision positioning system for detecting the position of a workpiece during machine tool processing. The machine tool vision positioning system includes a support assembly mounted on the machine tool and a detection assembly movably mounted on the support assembly. The detection assembly includes a first detection unit movably mounted on the support assembly for detecting the horizontal position of the workpiece and a second detection unit movably mounted on the support assembly for detecting the vertical position of the workpiece.

[0008] Specifically, in this embodiment, the support assembly includes a first connecting block and a second connecting block for connecting to the head of the machine tool, a first upright rod installed at the bottom of the first connecting block, a second upright rod installed at the bottom of the second connecting block, and a crossbar for connecting the first upright rod and the second upright rod.

[0009] Specifically, in this embodiment, the bracket assembly further includes an adjustment mechanism for adjusting the installation height of the crossbar, and the crossbar is connected to the first upright and the second upright through the adjustment mechanism.

[0010] Specifically, in this embodiment, the adjustment mechanism includes a first slide groove mounted on the first upright, a second slide groove mounted on the second upright, a slider mounted on the end of the crossbar, and a locking bolt for fixing the slider in the first slide groove and the second slide groove.

[0011] Specifically, in this embodiment, the first detection unit includes a first connector slidably mounted on the crossbar, and a first camera connected to the first connector.

[0012] Specifically, in this embodiment, the second detection unit includes a second connector slidably mounted on the first pole and the second pole, and a second camera connected to the second connector.

[0013] Specifically, in this embodiment, the machine tool vision positioning system further includes a light source assembly mounted on the support assembly for supplementing light to the detection assembly. The light source assembly includes a first light source mounted on the first camera and a second light source aligned with the optical axis of the second camera.

[0014] Specifically, in this embodiment, the light source assembly further includes a light source bracket for supporting the second light source, and the light source bracket is mounted on the machine tool.

[0015] Specifically, in this embodiment, the machine tool vision positioning system further includes a data transmission module, which includes a first wiring harness, a second wiring harness, and a circuit board. The first wiring harness is connected between the first detection unit and the circuit board, and the second wiring harness is connected between the second detection unit and the circuit board. The circuit board also includes an output interface for transmitting data to the outside.

[0016] A machine tool includes a machine tool body, a control system, and a machine tool vision positioning system as described in any one of the embodiments of this invention. The machine tool body includes a mounting platform for connecting to the first connecting block and the second connecting block of the support assembly, and the control system is communicatively connected to the output interface of the data transmission module.

[0017] Compared with the prior art, the machine tool vision positioning system provided by the embodiments of this application has many advantages, such as: (1) The first detection unit and the second detection unit respectively detect the horizontal and vertical positions of the workpiece, realize multi-dimensional accurate positioning, make up for the deficiency of the traditional single sensor positioning information acquisition, and can more accurately determine the position of the workpiece and improve the processing accuracy. (2) The support assembly has the function of adjusting the height of the crossbar, and the detection assembly can move flexibly on the support, so that the system can easily adapt to the processing needs of workpieces of different sizes and shapes, without the need to frequently change or adjust a large number of parts for different workpieces, thus improving the flexibility and convenience of production. (3) The horizontal and vertical detection units can work simultaneously to quickly complete the detection of the workpiece position. Combined with the light source assembly, the imaging quality is improved, the detection error is reduced, and repeated detection is avoided. The data transmission module can transmit the detection data to the machine tool control system in a timely manner, thereby improving the efficiency of the entire processing process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a vehicle anti-collision device provided in an embodiment of the present invention.

[0020] Figure 2 for Figure 1 A schematic diagram of the vehicle collision avoidance device from another perspective.

[0021] Figure 3 for Figure 1 The diagram shows the structure of the energy-absorbing component in the vehicle collision avoidance structure.

[0022] Figure 4 for Figure 3 The enlarged view shown.

[0023] Figure 5 for Figure 1 The system flowchart of the vehicle collision avoidance device.

[0024] In the figure: 1. Support assembly; 11. First connecting block; 12. Second connecting block; 13. First upright; 14. Second upright; 15. Horizontal bar; 16. First slide groove; 17. Second slide groove; 18. Slider; 19. Locking bolt; 2. Detection assembly; 21. First camera; 22. First connector; 23. Second camera; 24. Second connector; 3. Light source assembly; 31. First light source; 32. Second light source. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0027] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when this utility model is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0029] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0030] Please refer to the following first. Figure 1 and Figure 2 The embodiments of this application provide a machine tool vision positioning system and a machine tool having the same. The machine tool vision positioning system includes a fixed bracket and a detection component 2. The detection component 2 includes a first detection unit and a second detection unit.

[0031] Please refer to the following: Figure 3 and Figure 4 The support assembly 1 is mounted on the machine tool. The first detection unit is horizontally movable on the support assembly 1 to detect the horizontal position of the workpiece. The second detection unit is vertically movable on the support assembly 1 to detect the vertical position of the workpiece. By movably mounting the detection assembly 2 on the support assembly 1, wherein the first detection unit can move horizontally to detect the horizontal position of the workpiece and the second detection unit can move vertically to detect the vertical position of the workpiece, multi-dimensional position information is obtained using visual inspection technology. This solves the problems of traditional mechanical positioning devices being prone to wear leading to decreased accuracy, lacking flexibility and being unable to adapt to different workpieces, and the inability of a single sensor to meet the requirements of all-round position detection, thus affecting processing accuracy and efficiency.

[0032] Specifically, in this embodiment, the support assembly 1 includes a first connecting block 11 and a second connecting block 12 for connecting to the machine tool head, a first upright 13 mounted on the bottom of the first connecting block 11, a second upright 14 mounted on the bottom of the second connecting block 12, and a crossbar 15 for connecting the first upright 13 and the second upright 14. The first connecting block 11 and the second connecting block 12 are fixed to the machine tool head by multiple bolts. Corresponding threaded holes are pre-machined on the machine tool head and the connecting blocks. Bolts are passed through the holes on the connecting blocks and screwed into the threaded holes on the machine tool head. The preload generated by tightening the bolts securely fixes the connecting blocks to the machine tool head. This connection method facilitates disassembly and installation, and allows the support assembly 1 to be adjusted or replaced as needed.

[0033] The top of the first upright 13 is welded to the bottom of the first connecting block 11, and the top of the second upright 14 is welded to the bottom of the second connecting block 12, ensuring a rigid connection between the uprights and the connecting blocks and reducing vibration and deformation during use. The crossbar 15 is horizontally connected between the first upright 13 and the second upright 14. The bracket assembly 1 also includes an adjustment mechanism for adjusting the installation height of the crossbar 15. The adjustment mechanism includes a first slide groove 16 mounted on the first upright 13, a second slide groove 17 mounted on the second upright 14, a slider 18 mounted at the end of the crossbar 15, and a locking bolt 19 for fixing the slider 18 in the first slide groove 16 and the second slide groove 17.

[0034] Specifically, the ends of the slider 18 and the crossbar 15 are connected by welding or bolts. The slider 18 is slidably connected to the first slide groove 16 and the second slide groove 17. The locking bolt 19 passes through the screw hole on the slider 18 and mates with the corresponding hole on the slide groove. When it is necessary to fix the position of the screw, tighten the locking bolt 19. The bolt head presses against the slider 18, generating sufficient friction between the slider 18 and the slide groove, thereby fixing the crossbar 15 at the required height.

[0035] The first slide groove 16 is installed on the first upright 13, and the second slide groove 17 is installed on the second upright 14. The slide grooves are installed vertically along the length of the uprights to ensure that the crossbar 15 remains horizontal when its height is adjusted. Slider blocks 18 are installed at both ends of the crossbar 15, corresponding to the positions of the first slide groove 16 and the second slide groove 17, allowing the sliders 18 to accurately engage with the slide grooves and achieve vertical sliding adjustment of the crossbar 15 on the uprights. Locking bolts 19 are installed on the sliders 18 for easy tightening by the operator after adjusting the height of the crossbar 15.

[0036] In this embodiment, the first detection unit includes a first connector 22 slidably mounted on the crossbar 15, and a first camera 21 connected to the first connector 22. The crossbar 15 serves as a horizontal support structure, connecting the first upright 13 and the second upright 14. The first connector 22 is mounted on the crossbar 15 and is used to fix and adjust the position of the first camera 21. Preferably, a lockable slider 18 or a clamping mechanism is used. The first camera 21 is connected to the crossbar 15 through the first connector 22 and can slide and be fixed in the axial direction of the crossbar 15.

[0037] The second detection unit includes a second connecting member 24 mounted on the first upright 13 and the second upright 14. The second connecting member 24 is slidably mounted on the first upright 13 and the second upright 14. A second camera 23 is connected to the second connecting member 24. The second camera 23 and the second connecting member 24 can move vertically relative to the axial direction of the first upright 13 and the second upright 14. The first upright 13 and the second upright 14 serve as vertical support structures and are mounted on the machine tool's support assembly 1 via the first connecting block 11 and the second connecting block 12. The second connecting member 24 is mounted on the uprights and is used to fix and adjust the position of the second camera 23. Preferably, a lockable slider 18 or a clamping mechanism is used. At least one second camera 23 is included, which is connected to the first upright 13 and the second upright 14 via the second connecting member 24, and can move and be fixed in the axial direction of the uprights.

[0038] The first detection unit and the second detection unit together constitute a complete vision positioning system, which enables precise positioning of the workpiece in three-dimensional space.

[0039] In this embodiment, the machine tool vision positioning system further includes a light source assembly 3 mounted on the bracket assembly 1. The light source assembly 3 includes a first light source 31 mounted on the first camera 21 and a second light source 32 mounted on the machine tool via the light source bracket. The first light source 31 is fixed around or to the side of the lens of the first camera 21 and moves horizontally synchronously with the first camera 21 to ensure that it is always aligned with the detection area. The second light source 32 is fixed on the machine tool via the light source bracket. The second light source 32 is installed separately from the second camera 23 but keeps its optical axis aligned.

[0040] The first detection unit is responsible for detecting the horizontal position of the workpiece. The first light source 31 is fixed to the first camera 21 and moves laterally with it, ensuring that the area captured by the first camera 21 always has stable and consistent illumination during the detection process. Since the horizontal detection range may be large, the first light source 31 moves synchronously with the first camera 21, illuminating the workpiece within the camera's field of view in real time. Regardless of where the first camera 21 moves, a clear image can be obtained, accurately detecting the horizontal position of the workpiece. The second detection unit detects the vertical position of the workpiece. The second light source 32 is positioned externally, illuminating the workpiece from different angles. During vertical detection, it is necessary to observe the characteristics of the workpiece at different heights. The externally positioned second light source 32 provides more comprehensive illumination, avoiding shadows caused by the second light source 32 being too close to the second camera 22, which could affect the judgment of the workpiece's vertical position.

[0041] In this embodiment, the machine tool vision positioning system further includes a data transmission module, which includes a first wiring harness, a second wiring harness, and a circuit board. The first wiring harness is connected between the first detection unit and the circuit board, and the second wiring harness is connected between the second detection unit and the circuit board. The circuit board also includes an output interface for transmitting data to the outside.

[0042] Another embodiment of this application provides a machine tool, including a machine tool body, a control system, and a machine tool vision positioning system of this embodiment. The machine tool body is provided with a dedicated mounting platform, which is designed with mounting slots for connecting with the first connecting block 11 and the second connecting block 12 of the vision positioning system. The control system is connected to the output interface of the vision positioning system for receiving detection data from the detection component 2.

[0043] Depend on Figure 5 As can be seen, the vision positioning system is mounted on the machine tool body with the help of bracket assembly 1 to perform visual positioning detection on the workpiece and obtain information such as the workpiece position and posture. This data is transmitted to the circuit board for preliminary processing and integration through the data transmission module (including the first wiring harness, the second wiring harness, and the circuit board), and then transmitted to the control system through the circuit board output interface. After receiving the workpiece positioning data from the circuit board, the control system controls the servo motor to perform compensating motion, adjust the tool path or workpiece fixture position, and ensure machining accuracy.

[0044] The working principle of the machine tool vision positioning system will be explained in detail below.

[0045] When using the machine tool vision positioning system, the support assembly 1 is first connected to the machine tool's mounting platform via the first connecting block 11 and the second connecting block 12, ensuring alignment with the machine tool coordinate system. The height of the crossbar 15 is adjusted using the adjustment mechanism to accommodate workpieces of different sizes. A standard calibration block is placed on the machine tool, and the first camera 21 and the second camera 23 respectively capture reference images in the horizontal and vertical directions. The transformation relationship between the camera coordinate system and the machine tool coordinate system is calculated using an image processing algorithm to complete the spatial calibration.

[0046] Then, the first camera 21 moves horizontally along the crossbar 15 to capture a top-view image of the workpiece. Using edge detection or feature matching algorithms, the horizontal offset of the workpiece is calculated. The second camera 23 moves vertically along the upright to capture a side-view image of the workpiece. The contour or reference surface of the workpiece in the image is analyzed to determine the vertical height deviation.

[0047] Next, the first and second wiring harnesses transmit the images or position data captured by the camera to the circuit board, which integrates the data and sends it to the machine tool control system through the output interface.

[0048] The control system compares the detection data and adjusts the tool path or workpiece fixture position to ensure machining accuracy.

[0049] Machine tool vision positioning system and the machine tool operation process with it:

[0050] 1. Workpiece clamping: Before machining, the workpiece is clamped on the machine tool's worktable. During clamping, ensure the approximate position of the workpiece is accurate to reduce the workload of subsequent adjustments to the vision positioning system. Simultaneously, ensure the workpiece is securely clamped to prevent displacement during machining.

[0051] 2. Position Detection: The machine tool vision positioning system is activated, and the first and second detection units begin operation. The first camera 21 moves horizontally on the crossbar 15 to detect the workpiece's horizontal position; the second camera 23 moves vertically on the upright to detect the workpiece's vertical position. The cameras acquire image data of the workpiece, and the light source assembly 3 provides illumination to enhance image clarity. The image data is transmitted to the circuit board of the data transmission module via the first and second wiring harnesses. The circuit board processes and analyzes the data to calculate the accurate horizontal and vertical position information of the workpiece.

[0052] 3. Data Transmission and Machining Adjustment: The data transmission module transmits the calculated workpiece position information to the machine tool's control system via the output interface. Based on the received position information, the control system adjusts the machine tool's cutting tools or worktable. If there is a deviation in the workpiece position, the control system will move the cutting tools or worktable to the correct machining position, ensuring that the cutting tools can accurately machine the workpiece and guaranteeing machining accuracy.

[0053] 4. Machining Process Monitoring: During machine tool processing, the vision positioning system continuously monitors the workpiece's position. The camera acquires real-time image data of the workpiece, and the data transmission module transmits this data to the control system. Based on the real-time monitoring data, the control system determines whether the workpiece has shifted. If workpiece displacement is detected, the control system promptly adjusts the position of the cutting tool or worktable to ensure the accuracy and stability of the machining process.

[0054] Based on the specific structure and working principle described above, the machine tool vision positioning system provided by the embodiments of this application can achieve many beneficial technical effects compared with the prior art, such as: (1) The first detection unit and the second detection unit respectively detect the horizontal and vertical positions of the workpiece, realize multi-dimensional accurate positioning, make up for the deficiency of the traditional single sensor positioning information acquisition, and can more accurately determine the position of the workpiece and improve the processing accuracy. (2) The support assembly 1 has the function of adjusting the height of the crossbar 15, and the detection assembly 2 can move flexibly on the support, so that the system can easily adapt to the processing needs of workpieces of different sizes and shapes, without the need to frequently change or adjust a large number of parts for different workpieces, thus improving the flexibility and convenience of production. (3) The horizontal and vertical detection units can work simultaneously to quickly complete the detection of the workpiece position. Combined with the light source assembly 3, the imaging quality is improved, the detection error is reduced, and repeated detection is avoided. The data transmission module can transmit the detection data to the machine tool control system in a timely manner, thereby improving the efficiency of the entire processing process.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A machine tool vision positioning system for detecting the position of a workpiece during machine tool processing, characterized in that, The machine tool vision positioning system includes a support assembly for mounting on the machine tool and a detection assembly movably mounted on the support assembly. The detection assembly includes a first detection unit movably mounted on the support assembly for detecting the horizontal position of the workpiece and a second detection unit movably mounted on the support assembly for detecting the vertical position of the workpiece.

2. The machine tool vision positioning system according to claim 1, characterized in that, The support assembly includes a first connecting block and a second connecting block for connecting to the head of the machine tool, a first upright rod installed at the bottom of the first connecting block, a second upright rod installed at the bottom of the second connecting block, and a crossbar for connecting the first upright rod and the second upright rod.

3. The machine tool vision positioning system according to claim 2, characterized in that, The bracket assembly also includes an adjustment mechanism for adjusting the installation height of the crossbar, which is connected to the first upright and the second upright via the adjustment mechanism.

4. The machine tool vision positioning system according to claim 3, characterized in that, The adjustment mechanism includes a first slide groove mounted on the first upright, a second slide groove mounted on the second upright, a slider mounted on the end of the crossbar, and a locking bolt for fixing the slider in the first slide groove and the second slide groove.

5. The machine tool vision positioning system according to claim 2, characterized in that, The first detection unit includes a first connector slidably mounted on the crossbar, and a first camera connected to the first connector.

6. The machine tool vision positioning system according to claim 5, characterized in that, The second detection unit includes a second connector slidably mounted on the first pole and the second pole, and a second camera connected to the second connector.

7. The machine tool vision positioning system according to claim 6, characterized in that, The machine tool vision positioning system also includes a light source assembly mounted on the bracket assembly for supplementing light to the detection assembly. The light source assembly includes a first light source mounted on the first camera and a second light source aligned with the optical axis of the second camera.

8. The machine tool vision positioning system according to claim 7, characterized in that, The light source assembly also includes a light source bracket for supporting the second light source, which is mounted on the machine tool.

9. The machine tool vision positioning system according to claim 1, characterized in that, The machine tool vision positioning system further includes a data transmission module, which includes a first wiring harness, a second wiring harness, and a circuit board. The first wiring harness is connected between the first detection unit and the circuit board, and the second wiring harness is connected between the second detection unit and the circuit board. The circuit board also includes an output interface for transmitting data to the outside.

10. A machine tool, comprising a machine tool body, a control system, and a machine tool vision positioning system as described in any one of claims 1-9, characterized in that, The machine tool body includes a mounting platform for connecting to the first connecting block and the second connecting block of the support assembly, and the control system is communicatively connected to the output interface of the data transmission module.

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