Visual measurement device, numerical control machine tool and visual detection method of numerical control machine tool

Abstract

The application discloses a visual measurement device, a numerical control machine tool and a visual detection method of the numerical control machine tool, and relates to the technical field of numerical control machine tools.The visual measurement device comprises a connecting seat, an optical assembly and an optical scale structure.The connecting seat is used for being detachably mounted on a tool shank of the numerical control machine tool and can move along with the tool shank of the numerical control machine tool.The optical assembly is connected to one side of the connecting seat in a first direction and is used for observing a product to be detected located on the side of the optical assembly away from the connecting seat and can convert an optical signal into a digital signal for transmission.The optical scale structure is arranged on the optical assembly so as to form a cursor for positioning when the optical assembly observes the product to be detected.The cursor of the optical scale structure is used for positioning the product, and the optical assembly is used for optical image detection.The whole detection process does not need to contact the product and can complete the measurement without separate programming, and the measurement efficiency is higher than that of the existing probe, and 2D profile measurement and surface texture observation of small parts can be realized.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool technology, and particularly to a vision measurement device, a CNC machine tool, and a vision inspection method for CNC machine tools. Background Technology

[0002] Currently, CNC machine tools use contact measuring devices for post-machining measurement. This method is difficult for measuring fine structures (measurement dimensions below 1mm) online due to limitations in probe size; smaller probes significantly increase cost and the probability of damage. Furthermore, contact probes are for measuring dimensional contours and cannot observe machining textures. For parts requiring surface texture inspection, external optical equipment is needed, and re-clamping and alignment are required for rework, impacting machining efficiency and accuracy. Additionally, accurate measurement requires programmed probe paths; without them, part measurement is impossible. Additional measurement tasks cannot be performed directly on the machine, leading to long lead times. Summary of the Invention

[0003] The main objective of this invention is to propose a visual measurement device, a CNC machine tool, and a visual inspection method for CNC machine tools. The visual measurement device is integrated into the CNC machine tool system. By using optical measurement methods, it does not contact the product under test and can realize 2D contour measurement and surface texture observation of micro parts. It is easy to install and replace without modifying the machine tool.

[0004] To achieve the above objectives, the present invention proposes a vision measurement device for CNC machine tools, the vision measurement device comprising:

[0005] A connecting seat for detachable mounting to the tool holder of a CNC machine tool, and capable of moving with the tool holder of the CNC machine tool; and,

[0006] An optical component, connected to one side of the connector along a first direction, is used to observe the product to be inspected located on the side of the optical component opposite to the connector, and is capable of converting optical signals into digital signals for transmission; and,

[0007] An optical scale structure is provided on the optical component to form a cursor for easy positioning when the optical component observes the product to be inspected.

[0008] In one embodiment, the optical component includes an optical lens and an optical module spaced apart along a first direction, the optical module being connected to the connector, and the optical scale structure being disposed on the side of the optical lens facing or away from the optical module.

[0009] In one embodiment, the optical lens, the optical module, the optical scale structure, and the connector are fitted together by a sealing element.

[0010] In one embodiment, the connector includes:

[0011] The first housing is for detachable mounting to the tool holder of a CNC machine tool; and,

[0012] A second base is connected at one end to the first base along the first direction and at the other end to the optical component. The second base is adjustable relative to the first base to adjust the flatness of the optical component in the plane perpendicular to the first direction.

[0013] In one embodiment, the end face of the first base body facing the second base body is recessed with a mounting groove, and the peripheral sidewall of the first base body is provided with a plurality of through holes communicating with the mounting groove;

[0014] The visual measurement device further includes a leveling structure, the leveling structure comprising:

[0015] The support column has one end extending into the mounting groove and the other end fixed to the second base body;

[0016] Multiple adjusting members, one end of each adjusting member being fixed to the peripheral side of the support column at the inner end portion of the mounting groove, and the outer surface of the other end having an external thread, extending out of the mounting groove from the corresponding through hole; and,

[0017] Multiple adjusting nuts are threadedly engaged with the portion of each adjusting member that extends out of the through hole.

[0018] In one embodiment, the bottom wall of the mounting groove is provided with a plurality of through holes:

[0019] The visual measurement device further includes a locking structure, the locking structure comprising:

[0020] Multiple threaded connectors, passing through multiple through holes, are threadedly mounted to the second base body. These multiple threaded connectors are located around the periphery of the support column and are staggered from the multiple adjusting members; and...

[0021] Multiple elastic elements are located within the mounting cavity and abut against the wall surface corresponding to the mounting groove and the second seat.

[0022] In one embodiment, the optical scale structure includes:

[0023] The main body is arranged in a ring shape;

[0024] An optical scale lens is disposed within the inner hole of the main body and is rotatably mounted along an axis extending in a first direction; and,

[0025] An adjusting ring is rotatably fitted onto the outside of the main body. The adjusting ring is connected to the optical scale lens via a connector so that when the adjusting ring is rotated by an external force, it can drive the optical scale lens to rotate synchronously.

[0026] In one embodiment, the visual measurement device further includes a backlight panel for movably mounting on a CNC machine tool's platform along a second direction, wherein the side of the backlight panel facing the optical assembly is used to place the product to be inspected; and / or,

[0027] The visual measurement device also includes a light source, which is disposed on the optical assembly.

[0028] The present invention also proposes a CNC machine tool, comprising:

[0029] A support platform, on which a movable tool holder is provided;

[0030] Visual measurement device; and,

[0031] A control device is electrically connected to the vision measurement device to control the movement of the tool holder according to the vision measurement device.

[0032] This invention also proposes a visual inspection method for CNC machine tools. Based on the aforementioned CNC machine tool, the visual inspection method for CNC machine tools includes the following steps:

[0033] The vision measurement device is controlled to move so that the scale of the optical scale structure corresponds to the measurement starting point of the product to be inspected, and the current coordinates are recorded as the starting coordinates;

[0034] The vision measurement device is controlled to continue moving to the measurement target point of the product to be inspected, and the current coordinates are recorded as the target point coordinates;

[0035] The measured values ​​are calculated and confirmed based on the starting coordinates and the target point coordinates.

[0036] In the technical solution of this invention, when it is necessary to inspect the processed parts, the cutting tool is removed from the tool holder of the CNC machine tool, and the connecting seat is fixed so that the entire vision measurement device can move in a controlled manner with the tool holder of the CNC machine tool. The product is positioned by the cursor of the optical scale structure, and optical image detection is performed by the optical components. The entire inspection process can be completed without contacting the product or requiring separate programming. It is more efficient than existing probe measurement. Since optical measurement converts the measured object into an image signal through light signal, the measurement accuracy and stability are high. By using a high-magnification lens and a high-resolution photosensitive element, 2D contour measurement and surface texture observation of tiny parts can be realized. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 An exploded perspective view of an embodiment of the visual measurement device provided by the present invention;

[0039] Figure 2 for Figure 1 A three-dimensional schematic diagram of the mid-vision measurement device in conjunction with the tool holder;

[0040] Figure 3 for Figure 1 A schematic diagram of the structure of the first seat in the middle;

[0041] Figure 4 for Figure 1 A schematic diagram of the leveling structure;

[0042] Figure 5 for Figure 1 A bottom-view schematic diagram of the optical scale structure;

[0043] Figure 6 for Figure 5 A schematic cross-sectional view along the middle AA section;

[0044] Figure 7 for Figure 1 An exploded 3D diagram showing the assembly of the optical module and the connector.

[0045] Figure 8 This is a schematic diagram of the visual inspection method for CNC machine tools provided by the present invention;

[0046] Figure 9 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the CNC machine tool vision inspection method in the embodiments of this application.

[0047] Explanation of icon numbers:

[0048] 100. Visual measuring device; 1. Connecting seat; 11. First seat body; 111. Mounting slot; 12. Second seat body; 2. Optical assembly; 21. Optical lens; 22. Optical module; 3. Optical scale structure; 31. Main body; 32. Optical scale lens; 33. Adjusting ring; 34. Connecting part; 41. Support column; 42. Adjusting part; 43. Adjusting nut; 51. Screw connector; 52. Elastic part; 6. Backlight panel; 7. Light source component; a. Sealing part;

[0049] 200. Knife handle.

[0050] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0053] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0054] Currently, the most common measurement method after machining on CNC machine tools is contact-type measurement. The contact probe is stored in a warehouse. When needed, the tool is removed from the CNC machine tool's tool holder, the contact probe is retrieved and installed, and measurement is performed by contacting the product's contact point. This measurement method has the following drawbacks:

[0055] Contact probes are devices for measuring dimensions and contours, but they cannot observe the texture of the machined parts. For parts that need to have their surface texture checked, external optical equipment is required for measurement. If rework is required, the parts need to be clamped and aligned again, which affects the efficiency and accuracy of the part processing.

[0056] Measurement of fine structures (measurement size less than 1 mm) is difficult online due to the limitation of probe size. The smaller the probe, the higher the cost and the higher the probability of probe damage.

[0057] For a probe to complete accurate measurements, its trajectory must be programmed. Without a programmed trajectory, it is impossible to measure the parts. If a measurement task is added temporarily, it cannot be completed directly on the equipment, which would take a long time.

[0058] In view of this, the present invention provides a vision measurement device, a CNC machine tool, and a vision inspection method for CNC machine tools, which replaces the existing contact-type side head with optical non-contact measurement, thereby solving the above-mentioned problems.

[0059] Please refer to Figures 1 to 2 The visual measurement device 100 includes a connecting base 1, an optical component 2, and an optical scale structure 3. The connecting base 1 is detachably mounted to the tool holder of a CNC machine tool and can move with the tool holder of the CNC machine tool. The optical component 2 is connected to one side of the connecting base 1 along a first direction and is used to observe the product to be inspected located on the side of the optical component 2 opposite to the connecting base 1, and can convert optical signals into digital signals for transmission. The optical scale structure 3 is disposed on the optical component 2 so as to form a cursor for easy positioning when the optical component 2 observes the product to be inspected.

[0060] In the technical solution of this invention, when it is necessary to inspect the processed parts, the cutting tool is removed from the tool holder of the CNC machine tool, and the connecting seat 1 is fixed so that the entire vision measurement device 100 can move in a controlled manner with the tool holder of the CNC machine tool. The product is positioned by the cursor of the optical scale structure 3, and optical image detection is performed by the optical component 2. The entire detection process can be completed without contacting the product or separate programming. It is more efficient than existing probe measurement. Since optical measurement converts the measured object into an image signal through light signal, the measurement accuracy and stability are high. By using a high-magnification lens and a high-resolution photosensitive element, 2D contour measurement and surface texture observation of micro parts can be realized.

[0061] It should be understood that by adjusting the cursor angle of the optical scale structure 3, the coordinate angle of the measuring lens is made consistent with the machine tool angle, thereby achieving parallelism between the vertical and horizontal directions of the vision measuring device 100 and the vertical and horizontal directions of the machine tool. The optical scale structure 3 is generally a cross scale, which can provide better positioning.

[0062] It should be noted that in this embodiment, the first direction is the vertical direction, the second direction is the horizontal direction, and the entire visual measurement device 100 is placed vertically. In other embodiments, the entire visual measurement device 100 can also be placed horizontally, in which case the first direction is the horizontal direction and the second direction is the vertical direction.

[0063] This invention does not limit the structural form of the optical module 22. A suitable optical lens module can be selected based on the detection requirements. In some embodiments, please refer to... Figure 2The optical component 2 includes optical lenses 21 and optical modules 22 spaced apart along a first direction. The optical module 22 is connected to the connector 1. Specifically, the optical scale structure 3 is positioned on the side of the optical lens 21 facing or away from the optical module 22. Since optical measurement converts the measured object into an image signal using light signals, the accuracy and stability of the measurement are determined by the performance of the optical lens 21 and the optical module 22. Higher pixel count optical modules 22 and higher magnification optical lenses 21 can provide finer measurements, but also have the highest equipment cost. Through this modular design, the optical module 22 and optical lens 21 can be combined according to different business scenarios, allowing for the selection of appropriate costs for different business needs.

[0064] It should be understood that, depending on the structural form, the optical scale structure 3 can be disposed between the optical lens 21 and the optical module 22, or it can be disposed on the side of the optical lens 21 facing away from the optical module 22, both of which can achieve the desired function. In this embodiment, please refer to... Figure 1 Since it is necessary to consider setting a light source for illumination at the end of the optical lens 21, the optical scale structure 3 is set between the optical lens 21 and the optical module 22 to avoid interference between components.

[0065] Because CNC machine tool processing easily generates waste chips, water mist, and oil stains, these can easily damage precision components within the structure. Please refer to... Figure 7 In some embodiments, the optical lens 21, the optical module 22, the optical scale structure 3, and the connecting seat 1 are fitted together by a sealing element a. This ensures the safety of precision components. Specifically, according to actual needs, sealing elements a are provided at the ends of parts requiring protection, such as between the optical lens 21 and the optical module 22, and between the optical module 22 and the connecting seat 1.

[0066] Furthermore, each module uses an integral housing, and the modules can be connected by threads or screws, with a waterproof sealing ring added at each module connection point.

[0067] If the flatness of the actual machined surface is not parallel to the lens focus, it will lead to a decrease in measurement clarity, resulting in measurement errors. Therefore, in some embodiments, the connecting seat 1 includes a first seat 11 and a second seat 12. The first seat 11 is detachably mounted to the tool holder of a CNC machine tool. One end of the second seat 12 along a first direction is connected to the first seat 11, and the other end is connected to the optical component 2. The second seat 12 is adjustable relative to the first seat 11 to adjust the flatness of the optical component 2 in the plane perpendicular to the first direction. This structure decomposes the connecting seat 1 into two parts, thereby realizing the two functions of mounting and fitting the connecting seat 1 to the tool holder and driving the optical component 2 to level. After the optical lens 21 is focused, the optical lens is leveled by adjusting the tilt angle of the second seat 12.

[0068] This invention does not limit the structural form of the second base 12 for leveling. For example, it can be achieved through a floating structure, such as a combination of leveling bolts and springs. In this embodiment, please refer to... Figures 3 to 4 The first base 11 has a recessed mounting groove 111 on its end face facing the second base 12. The peripheral sidewall of the first base 11 has multiple through holes communicating with the mounting groove 111, and the multiple through holes are arranged circumferentially. The visual measurement device 100 also includes a leveling structure, which includes a support column 41, multiple adjusting members 42, and multiple adjusting nuts 43. One end of the support column 41 extends into the mounting groove 111, and the other end is fixed to the second base 12. One end of each adjusting member 42 is fixed to the peripheral side of the support column 41 at the inner end of the mounting groove 111, and the outer surface of the other end is provided with external threads and extends out of the mounting groove 111 from the corresponding through hole. The adjusting nut 43 is threadedly engaged with the portion of each adjusting member 42 that extends out of the through hole. Multiple adjusting members 42 and the support column 41 cooperate to suspend the second seat 12 on the first seat 11. The upper end of the support column 41, or the entire support column 41, is hidden within the mounting groove 111. By rotating each adjusting nut 43 clockwise or counterclockwise, the position of each adjusting member 42 can be adjusted. This utilizes the shaft hole clearance and the change in the length of the adjusting member 42 within the mounting groove 111 to change the angle of the support column 41, ultimately achieving flatness adjustment of the second seat 12. The support column 41 should correspond to the center of the second seat 12.

[0069] It should be understood that, in order to prevent the second seat 12 from wobbling after adjustment, it is preferable to provide multiple springs in the mounting groove 111. The multiple springs press against the end face of the second seat 12, thereby always providing preload force to ensure the relative state of the first seat 11 and the second seat 12, and can also be used to adjust the level.

[0070] Furthermore, the bottom wall of the mounting groove 111 is provided with multiple through holes. The visual measurement device 100 also includes a locking structure, which includes multiple screw connectors 51 and multiple elastic elements 52. The multiple screw connectors 51 pass through the multiple through holes and are threaded onto the second seat 12. The multiple screw connectors 51 are located on the periphery of the support column 41 and are staggered from the multiple adjusting elements 42. The multiple elastic elements 52 are located in the mounting cavity and abut against the wall of the mounting groove 111 and the second seat 12. In this embodiment, the combination of elastic elements 52 and screw connectors 51 can both lock the first seat 11 and the second seat 12 after leveling and provide elastic preload through the elastic elements 52.

[0071] The number of elastic elements 52 can correspond to or differ from the number of screw connections 51. The elastic elements 52 can be springs, elastic rubber, sheet metal, or similar structures. In this embodiment, four bolts are provided, each with a spring fitted onto the rod portion within the mounting groove 111, thus forming a mutual engagement between the screw connections 51 and the elastic elements 52. That is, in this embodiment, the angle of the support column 41 is changed by the adjusting nut 43, and pre-tightening and fixing are achieved through the springs and bolts, ultimately realizing the adjustment of the lens's horizontal plane.

[0072] In some embodiments, the first seat 11 and the second seat 12 can be connected by a sliding groove and a slider, and by reasonably setting the gap between the sliding groove and the slider in the first direction, the two can be horizontally adjusted within a certain range.

[0073] For further details, please refer to Figures 5 to 6 The optical ruler structure 3 includes a main body 31, an optical ruler lens 32, and an adjusting ring 33. The main body 31 is arranged in a ring shape. The optical ruler lens 32 is disposed in the inner hole of the main body 31 and can be rotatably installed along an axis extending in a first direction. The adjusting ring 33 is rotatably sleeved on the outside of the main body 31. The adjusting ring 33 and the optical ruler lens 32 are connected by a connector 34 so that when the adjusting ring 33 is rotated by an external force, it can drive the optical ruler lens 32 to rotate synchronously. Specifically, the main body 31 is connected to the optical component 2 and remains relatively fixed, so that the center of the optical ruler lens 32 coincides with the optical axis of the optical component 2. When the operator rotates the adjusting ring 33, the optical ruler lens 32 can be rotated. At this time, the center of the cursor remains unchanged, while the crosshair of the cursor rotates around the center, thereby allowing for cursor alignment adjustment.

[0074] In order to achieve the rotation of the optical ruler lens 32, the optical ruler lens 32 is mounted with a bearing to rotate with the main body 31. At the same time, a corresponding annular or arc-shaped track should be provided on the main body 31 to allow the connecting member 34 to move, so that when the adjusting ring 33 rotates, the connecting member 34 rotates accordingly without interfering with the main body 31.

[0075] Furthermore, to protect the parts, please refer to... Figure 6 A sealing element a is provided between the adjusting ring 33 and the main body 31, that is, the adjusting ring 33 and the main body 31 are in a rotational sealing fit.

[0076] Please refer to this again. Figure 1 The visual measurement device 100 further includes a light source 7, which is disposed at the lower end of the optical component 2. The present invention does not limit the structural form of the light source 7; it can be multiple LEDs installed at the lower end of the housing of the optical component 2 for illumination, or it can be a ring-shaped LED strip fitted onto the lower end of the optical component 2. Figure 1 In one embodiment, the light source 7 is a separate, detachable module arranged in a ring, with a built-in LED light, and is installed on the outside of the lower end of the optical lens 21.

[0077] Considering that the through holes and shape features of machined parts are not easily identifiable without other reference features, even with the addition of an LED light source, which is generally illuminated from the front, resulting in blurred edges, please refer to [other references] again in some implementations. Figure 1 The vision measurement device 100 also includes a backlight plate 6, which is movably mounted on the support table of the CNC machine tool along the second direction. The side of the backlight plate 6 facing the optical component 2 is used to place the product to be inspected. Specifically, by adding backlight to the back of the part, the light source shines from the back of the part, avoiding the problem of blurred edges, thereby improving the measurement accuracy. The backlight plate 6 is set to be movable so as to adapt to the position of the part being processed, and can be removed when not in use.

[0078] In this embodiment, the backlight plate 6 and the light source 7 are provided simultaneously to ensure clear visual detection of the optical component 2 during the detection process.

[0079] In this embodiment, the visual measurement device 100 serves two purposes: firstly, it facilitates dimensional measurement through visual inspection; secondly, it allows for confirmation of the processed texture by magnifying the target image. Visual measurement eliminates the need for product contact and programming, offering higher efficiency than probe-based measurements. It enables rapid 2D contour measurement and observation of processed surface textures. Furthermore, it is not limited by probe diameter, allowing for online measurement of minute features without requiring off-machine operation. Additionally, AI-based recognition of visual images enables autonomous measurement during part processing.

[0080] The present invention also proposes a CNC machine tool, which includes a vision measuring device 100. The specific structure of the vision measuring device 100 is as described in the above embodiments. Since the CNC machine tool adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0081] Specifically, the CNC machine tool also includes a support platform and a control device. A movable tool holder is mounted on the support platform. The control device is electrically connected to the vision measurement device 100 to control the movement of the tool holder according to the vision measurement device 100. It should be understood that the control device here is a built-in control device of the CNC machine tool. The vision measurement device 100 provides visual reference, and coordinate acquisition and position changes are achieved through the functions of the CNC machine tool itself.

[0082] Based on the above implementation, please refer to Figure 8 This invention proposes a visual inspection method for CNC machine tools, specifically including the following steps:

[0083] S10, control the visual measurement device 100 to move so that the scale of the optical scale structure 3 corresponds to the measurement starting point of the product to be inspected, and record the current coordinates as the starting coordinates;

[0084] It should be noted that the starting point for measuring the product to be tested can be either a point or an edge. Accordingly, when measuring from point to point, the center of the scale of the optical scale structure 3 is directly opposite to the starting point of the measurement. When measuring from edge to point or edge to edge, one of the cross lines of the optical scale structure 3 is directly opposite to the edge where the starting point of the measurement is located.

[0085] It should be understood that before the formal inspection is carried out, the visual measurement device 100 needs to be leveled, and the adjustment ring 33 needs to be rotated so that the crosshair angle and the machine tool coordinate angle are consistent.

[0086] Considering that the color difference between the machined and unmachined surfaces of a part is not obvious, it may not be convenient to judge during visual inspection. Therefore, the part is colored with a non-water-soluble oil-based pen before finishing. After the machining is completed, the unmachined surface retains the color, while the machined surface reveals the original color of the material. This can improve the contrast between the machined and unmachined surfaces during visual inspection, thereby improving the resolution of visual measurement.

[0087] It should be noted that the vision measurement device 100 only plays a visual aid role; the data and coordinates are obtained by operating the CNC machine tool.

[0088] S20, control the visual measurement device 100 to continue moving to the measurement target point of the product to be inspected, and record the current coordinates as the target point coordinates;

[0089] It should be understood that when controlling a CNC machine tool to perform dimensional inspection, the tool is controlled to make linear displacement to reach the measurement target point of the product to be measured, and the coordinates after the movement are recorded as the target point coordinates.

[0090] When performing angle detection, the corresponding control tool holder moves along the edge of the measured angle along a trajectory, and the target point of the measurement is the end point of the trajectory.

[0091] S30, calculate and confirm the measured value based on the starting coordinates and the target point coordinates.

[0092] The measured value can be calculated using the target point coordinates and the starting coordinates. For example, if the starting point coordinates are (5, 0) and the target point coordinates are (15, 0), the measured value is 10 mm. Alternatively, after confirming the starting coordinates, the coordinates can be zeroed, and the starting point coordinates will be (0, 0). Therefore, the value of the target point coordinates is the final measured value.

[0093] For example, taking the measurement of straight distance as an example, first, by moving the tool holder, the center of the optical crosshair is aligned with the zero point of the workpiece, and the coordinates of the CNC machine tool are recorded and returned to zero. Then, the tool holder is moved again to move the optical crosshair to the target point. Finally, the current system coordinate position of the CNC machine tool is recorded, which is the measured straight distance.

[0094] Besides dimensional inspection, routine machining often involves ensuring smooth transitions between different cutting tools on the same plane. By utilizing the differences in surface textures caused by different tools and machining parameters after milling, an optical lens 21 magnifies these differences, allowing for a clear comparison of the tool marks. By controlling the movement of the tool holder, the surface texture at each end can be observed. Based on the inspection results from the vision measurement device, the machining parameters of the CNC machine tool can be adjusted to achieve smooth transitions between different cutting tools.

[0095] It should be noted that the control device provided in this application includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the CNC machine tool vision inspection method in Embodiment 1 above.

[0096] The following is for reference. Figure 9 The diagram illustrates a structural schematic of a control device suitable for implementing embodiments of this application. The control device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 9 The control device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0097] like Figure 9 As shown, the control device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the control device. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the control device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a control device with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented alternatively.

[0098] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0099] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A vision measuring device for a numerically controlled machine tool, characterized in that, The visual measurement device comprises: a connecting seat for detachable mounting on a tool shank of a numerical control machine tool and capable of moving with the tool shank of the numerical control machine tool; an optical assembly connected to one side of the connecting seat in a first direction for observing a product to be detected located on the side of the optical assembly away from the connecting seat and capable of converting an optical signal into a digital signal for transmission; an optical scale structure arranged on the optical assembly to form a light mark for positioning when the optical assembly observes the product to be detected; the connecting seat comprises: a first seat body for detachable mounting on a tool shank of a numerical control machine tool; and a second seat body connected to the first seat body at one end in the first direction and connected to the optical assembly at the other end, the second seat body being adjustably arranged relative to the first seat body to adjust the flatness of the optical assembly in a plane perpendicular to the first direction; an end face of the first seat body facing the second seat body is recessed with a mounting groove, and a peripheral side wall of the first seat body is provided with a plurality of through holes communicating with the mounting groove; the visual measurement device further comprises a leveling structure, the leveling structure comprising: a support column extending into the mounting groove at one end and fixed to the second seat body at the other end; a plurality of adjusting members, one end of each adjusting member being fixed to the peripheral side of the end portion of the support column in the mounting groove, and the other end being provided with an external thread, and the adjusting member extending out of the mounting groove from the corresponding through hole, so that the second seat body is suspended on the first seat body; a plurality of adjusting nuts threadedly cooperating with the portion of each adjusting member extending out of the through hole, so as to change the angle of the support column by changing the length of the adjusting member in the mounting groove and the gap between the shaft holes.

2. The vision measurement device of claim 1, wherein, The optical assembly comprises an optical lens and an optical module arranged at intervals in the first direction, the optical module being connected to the connecting seat, and the optical lens being provided with the optical scale structure on the side facing or away from the optical module.

3. The vision measurement device of claim 2, wherein, The optical lens, the optical module, the optical scale structure and the connecting seat are cooperated by a sealing member.

4. The vision measurement device of claim 1, wherein, The bottom wall of the mounting groove is provided with a plurality of through holes. The visual measurement device further comprises a locking structure, the locking structure comprising: a plurality of threaded members passing through a plurality of the through holes to be threadedly mounted on the second seat body, the plurality of threaded members being located on the peripheral side of the support column and being arranged staggered with the plurality of adjusting members; and a plurality of elastic members being located in the mounting cavity and abutting against the corresponding wall of the mounting groove and the second seat body.

5. The vision measurement device of claim 1, wherein, The optical scale structure comprises: a main body arranged in a ring shape; a light scale lens arranged in the inner hole of the main body and capable of being rotatably mounted along the axis extending in the first direction; and an adjusting ring rotatably sleeved on the outside of the main body, the adjusting ring being connected to the light scale lens through a connecting member, so that the adjusting ring can drive the light scale lens to rotate synchronously when the adjusting ring is rotated by an external force.

6. The vision measurement device of claim 1, wherein, The visual measurement device further comprises a backlight plate for being movably arranged on a bearing table of a numerical control machine tool in a second direction, the side of the backlight plate facing the optical assembly being used for placing a product to be detected; and / or The visual measurement device further comprises a light source arranged on the optical assembly.

7. A numerically controlled machine tool, characterized by comprising: Comprise: A bearing table, wherein a movable tool shank is arranged on the bearing table; The visual measurement device according to any one of claims 1 to 6; And, A control device electrically connected with the visual measurement device to control the movement of the tool shank according to the visual measurement device.

8. A visual inspection method for a numerically controlled machine tool based on the numerically controlled machine tool of claim 7, characterized in that, The visual detection method of the numerical control machine tool comprises the following steps: Controlling the visual measurement device to move so that the scale of the optical scale structure corresponds to the measurement starting point of the product to be detected, and recording the current coordinate as the starting coordinate; Controlling the visual measurement device to continue moving to the measurement target point of the product to be detected, and recording the current coordinate as the target point coordinate; According to the starting coordinate and the target point coordinate, the measurement value is calculated.

Images