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

Abstract

The invention discloses a vision measurement device, a numerically-controlled machine tool and a vision detection method of the numerically-controlled machine tool, and relates to the technical field of numerically-controlled machine tools, the vision measurement device comprises a connecting seat, an optical assembly and an optical scale structure, the connecting seat is used for being detachably installed on a cutter handle of the numerically-controlled machine tool and can move along with the cutter handle of the numerically-controlled machine tool; the optical assembly is connected to one side of the connecting seat along the first direction, is used for observing a to-be-detected product on one side of the optical assembly back to 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 that a cursor can be formed to facilitate positioning when the optical assembly observes the product to be detected. Product positioning is carried out through the cursor of the optical scale structure, optical image detection is carried out through the optical module, measurement can be completed without contacting the product and independent programming in the whole detection process, the efficiency is higher than that of existing probe measurement, and 2D contour measurement and surface texture observation of micro parts can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, and in particular to a visual measuring device, a numerically controlled machine tool and a numerically controlled machine tool visual inspection method. Background Art

[0002] The post-processing measurement method currently used by CNC machine tools is contact measurement equipment. This test method makes it difficult to measure microstructures (measurement size below 1mm) online due to the limitation of the probe size. The smaller the probe, the greater the cost and the probability of probe damage. In addition, the contact probe is a device for measuring dimensional contours and cannot observe the processed texture. For parts that need to view the surface texture, external optical equipment is required for measurement. If rework is required, secondary clamping and alignment are required, which affects the processing efficiency and accuracy of the parts. At the same time, the probe trajectory must be programmed to complete precise measurement. Without the programmed trajectory, the measurement of the part cannot be completed. If a measurement task is temporarily added, it cannot be completed directly on the equipment, which takes a long time. Summary of the invention

[0003] The main purpose of the present invention is to propose a visual measuring device, a CNC machine tool and a visual inspection method for CNC machine tools, which integrate the visual measuring device into the CNC machine tool system, use optical measurement methods, and do not contact the product to be measured. It can achieve 2D contour measurement and surface texture observation of tiny parts, is easy to install and replace, and does not require modification of the machine tool.

[0004] To achieve the above object, the present invention provides a visual measuring device for a CNC machine tool, the visual measuring device comprising:

[0005] A connecting seat, which is used to be detachably mounted on a tool handle of a CNC machine tool and can move with the tool handle of the CNC machine tool; and,

[0006] an optical component connected to one side of the connection base along the first direction, used to observe the product to be inspected located on the side of the optical component facing away from the connection base, and capable of converting optical signals into digital signals for transmission; and

[0007] The optical scale structure is arranged on the optical component so as to form a cursor for facilitating positioning when the optical component observes the product to be inspected.

[0008] In one embodiment, the optical assembly includes an optical lens and an optical module spaced apart along a first direction, the optical module is connected to the connecting seat, and the optical scale structure is arranged on a side of the optical lens facing toward or away from the optical module.

[0009] In one embodiment, the optical lens, the optical module, the optical scale structure and the connecting seat are matched together through a seal.

[0010] In one embodiment, the connection base comprises:

[0011] A first seat body is used for being detachably mounted on a tool handle of a CNC machine tool; and

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

[0013] In one embodiment, a placement groove is formed on the end surface of the first base body facing the second base body, and a plurality of through holes connected to the placement groove are formed on the peripheral side wall of the first base body;

[0014] The visual measurement device also includes a leveling structure, and the leveling structure includes:

[0015] A support column, one end of which extends into the placement groove and the other end is fixed to the second seat body;

[0016] A plurality of adjusting members, each of which has one end fixed to the peripheral side surface of the support column at the inner end portion of the placement groove, and the other end having an external thread on the outer surface thereof and extending out of the placement groove from the corresponding through hole; and

[0017] A plurality of adjusting nuts are threadably matched with the portions of the adjusting members extending out of the through holes.

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

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

[0020] a plurality of screw-connecting members, passing through the plurality of through holes and being threadedly mounted on the second seat body, the plurality of screw-connecting members being located on the peripheral side of the support column and staggered with the plurality of adjusting members; and,

[0021] A plurality of elastic members are located in the installation cavity and are pressed against the wall surface corresponding to the placement groove and the second seat body.

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

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

[0024] A ruler lens is disposed in the inner hole of the main body and can be rotatably mounted along an axis extending in the first direction; and

[0025] An adjusting ring is rotatably mounted on the outside of the main body, and the adjusting ring is connected to the optical ruler lens through a connecting piece so that when the adjusting ring is rotated by an external force, the optical ruler lens can be driven to rotate synchronously.

[0026] In one embodiment, the visual measurement device further comprises a backlight plate, which is used to be movably arranged on a carrier table of a CNC machine tool along a second direction, and a side of the backlight plate facing the optical component is used to place a product to be inspected; and / or,

[0027] The visual measurement device further includes a light source component, and the light source component is disposed on the optical component.

[0028] The present invention also provides a numerically controlled machine tool, comprising:

[0029] A carrying platform, wherein a movably arranged knife handle is disposed on the carrying platform;

[0030] Vision measurement devices; and,

[0031] A control device is electrically connected to the visual measuring device to control the movement of the tool handle according to the visual measuring device.

[0032] The present invention also proposes a CNC machine tool visual inspection method. Based on the above-mentioned CNC machine tool, the CNC machine tool visual inspection method comprises the following steps:

[0033] 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 inspected, and recording the current coordinates as the starting coordinates;

[0034] Control the visual measurement device to continue moving to the measurement target point of the product to be inspected, and record the current coordinates as the target point coordinates;

[0035] A confirmed measurement value is calculated based on the starting coordinates and the target point coordinates.

[0036] In the technical solution of the present invention, when it is necessary to inspect the processed parts, the tool is removed from the tool handle of the CNC machine tool, and the connecting seat is fixed, so that the visual measurement device as a whole can be controlled to move along with the tool handle of the CNC machine tool, the product is positioned by the cursor of the optical ruler structure, and the optical image detection is performed by the optical component. The entire detection process does not require contact with the product, and the measurement can be completed without separate programming. Compared with the existing probe measurement efficiency, optical measurement is higher. Since optical measurement converts the measured object into an image signal through an optical signal, the measurement accuracy and stability are high. With the help of a high-power lens and a high-resolution photosensitive element, 2D contour measurement and surface texture observation of tiny parts can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1 A three-dimensional exploded schematic diagram of an embodiment of a visual measurement device provided by the present invention;

[0039] Figure 2 for Figure 1 A three-dimensional schematic diagram of the cooperation between the visual measuring device and the tool handle;

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

[0041] Figure 4 for Figure 1 Schematic diagram of the mid-leveling structure;

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

[0043] Figure 6 for Figure 5 Schematic diagram of the cross section along AA;

[0044] Figure 7 for Figure 1 A three-dimensional exploded diagram of the cooperation between the optical module and the connector;

[0045] Figure 8 A schematic diagram of a CNC machine tool visual inspection method provided by the present invention;

[0046] Fig. 9 Schematic diagram of the equipment structure of the hardware operating environment involved in the CNC machine tool visual inspection method in the embodiment of the present application.

[0047] Description of Figure Numbers:

[0048] 100. Visual measuring device; 1. Connecting seat; 11. First seat body; 111. Placement groove; 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. Adjustment ring; 34. Connector; 41. Support column; 42. Adjustment member; 43. Adjustment nut; 51. Screw-on member; 52. Elastic member; 6. Backlight panel; 7. Light source member; a. Sealing member;

[0049] 200. Handle.

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

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0054] At present, the most common post-processing measurement method for CNC machine tools is contact measurement. The contact probe is stored in the library. When it is needed, the tool on the CNC machine tool handle is removed, and the contact probe is called out and installed to detect the measuring position of the contact product. This measurement method has the following defects:

[0055] The contact probe is a device for measuring dimensional contours, and cannot observe the processed texture. For parts that need to check the surface texture, external optical equipment is required for measurement. If rework is required, secondary clamping and alignment are required, which affects the processing efficiency and accuracy of the parts.

[0056] It is difficult to measure microstructures (measurement size less than 1mm) online due to the limitation of probe size. The smaller the probe, the greater the cost and the probability of probe damage.

[0057] In order to complete precise measurement, the probe trajectory must be programmed. Without the programmed trajectory, the measurement of the part cannot be completed. If a measurement task is added temporarily, it cannot be completed directly on the equipment and takes a long time.

[0058] In view of this, the present invention provides a visual measuring device, a CNC machine tool and a CNC machine tool visual inspection method, which solve the above-mentioned problems by replacing the existing contact-type side head with optical non-contact measurement.

[0059] Please refer to Figure 1 to Figure 2 The visual measuring device 100 includes a connecting seat 1, an optical component 2 and an optical ruler structure 3. The connecting seat 1 is used to be detachably mounted on the tool handle of a CNC machine tool and can move with the tool handle of the CNC machine tool; the optical component 2 is connected to one side of the connecting seat 1 along a first direction, and is used to observe the product to be inspected located on the side of the optical component 2 facing away from the connecting seat 1, and can convert the optical signal into a digital signal for transmission; the optical ruler structure 3 is arranged on the optical component 2, so that a cursor can be formed when the optical component 2 observes the product to be inspected to facilitate positioning.

[0060] In the technical solution of the present invention, when it is necessary to inspect the processed parts, the tool is removed from the tool handle of the CNC machine tool, and the connecting seat 1 is fixed, so that the visual measurement device 100 as a whole can be controlled to move along with the tool handle of the CNC machine tool, the product is positioned by the cursor of the optical ruler structure 3, and the optical image detection is performed through the optical component 2. The entire detection process does not require contact with the product, and the measurement can be completed without separate programming. Compared with the existing probe measurement efficiency, it is higher. Since optical measurement converts the measured object into an image signal through an optical signal, the measurement accuracy and stability are high. With the help of a high-power lens and a high-resolution photosensitive element, 2D contour measurement and surface texture observation of tiny parts can be achieved.

[0061] It should be understood that by adjusting the cursor angle of the optical scale structure 3, the measuring lens coordinate angle is made consistent with the machine tool angle, so that the vertical and horizontal directions of the visual measuring device 100 are parallel to the vertical and horizontal directions of the machine tool. The optical scale structure 3 is generally a cross scale, which can better position.

[0062] It should be noted that, in this embodiment, the first direction is the up-down 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] The present invention does not limit the structural form of the optical module 22, and a suitable optical lens module can be selected according to the detection requirements. In some embodiments, please refer to Figure 2, the optical assembly 2 includes an optical lens 21 and an optical module 22 spaced apart along a first direction, the optical module 22 is connected to the connection seat 1, and specifically, the optical scale structure 3 is arranged on the side of the optical lens 21 facing or facing away from the optical module 22. Since optical measurement converts the measured object into an image signal through an optical signal, the accuracy and stability of the measurement are determined by the performance of the optical lens 21 and the optical module 22. An optical module 22 with a higher pixel and an optical lens 21 with a higher magnification can provide more precise measurements, and the corresponding equipment cost is also the highest. Through this modular design approach, the optical module 22 and the optical lens 21 can be combined according to different business scenarios, and the appropriate cost can be selected for different business needs.

[0064] It should be understood that, according to different structural forms, the optical scale structure 3 can be arranged between the optical lens 21 and the optical module 22, or can be arranged on the side of the optical lens 21 facing away from the optical module 22, and both functions can be achieved. Figure 1 Since it is necessary to set 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] Since CNC machine tools are prone to produce waste chips, water mist, and oil pollution during processing, it is easy to damage the precision parts in the structure. Figure 7 In some embodiments, the optical lens 21, the optical module 22, the optical scale structure 3 and the connecting seat 1 are matched with each other through a seal a. To ensure the safety of precision parts, specifically, a seal a is set at the end of the part to be protected according to actual needs, such as between the optical lens 21 and the optical module 22, and between the optical module 22 and the connecting seat 1.

[0066] In addition, 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.

[0067] If the surface flatness of the actual processing is not parallel to the lens focus, the measurement clarity will be reduced, thereby causing measurement errors. Therefore, in some embodiments, the connecting seat 1 includes a first seat body 11 and a second seat body 12. The first seat body 11 is used to be detachably mounted on the tool handle of the CNC machine tool; the second seat body 12 is connected to the first seat body 11 at one end along the first direction, and the other end is connected to the optical component 2. The second seat body 12 is adjustable relative to the first seat body 11 to adjust the flatness of the optical component 2 in a plane perpendicular to the first direction. This structure decomposes the connecting seat 1 into two parts, so that the two functions of the connecting seat 1 and the tool handle can be realized, and the optical component 2 can be driven to level. After the optical lens 21 is focused, the optical lens 2 is leveled by adjusting the tilt angle of the second seat body 12.

[0068] The present invention does not limit the structural form of the second seat body 12 for leveling. For example, it can be a floating structure, such as a combination of equal height bolts and springs. In this embodiment, please refer to Figure 3 to Figure 4 The end surface of the first base body 11 facing the second base body 12 is concavely provided with a placement groove 111, and the peripheral side wall of the first base body 11 is provided with a plurality of through holes connected to the placement groove 111, and the plurality of through holes are arranged along the circumferential direction; the visual measurement device 100 also includes a leveling structure, and the leveling structure includes a support column 41, a plurality of adjustment members 42 and a plurality of adjustment nuts 43, one end of the support column 41 extends into the placement groove 111, and the other end is fixed to the second base body 12; one end of each of the adjustment members 42 is fixed to the peripheral side surface of the support column 41 at the inner end portion of the placement groove 111, and the outer surface of the other end is provided with an external thread, and extends from the corresponding through hole to the placement groove 111; the adjustment nut 43 is threadedly matched with the portion of each of the adjustment members 42 extending from the through hole. The plurality of adjusting members 42 cooperate with the support column 41, so that the second seat body 12 is suspended and mounted on the first seat body 11, and the upper end of the support column 41 or the entire support column 41 is hidden in the placement groove 111. By rotating each adjusting nut 43 clockwise or counterclockwise, the position state of each adjusting member 42 can be adjusted, so as to change the angle of the support column 41 by utilizing the shaft hole gap and the length change of the adjusting member 42 in the placement groove 111, and finally realize the flatness adjustment of the second seat body 12. The support column 41 should correspond to the center of the second seat body 12.

[0069] It should be understood that in order to prevent the second seat body 12 from shaking after adjustment, it is preferred to arrange multiple springs in the seating groove 111, and the multiple springs press against the end surface of the second seat body 12, thereby always providing a pre-tightening force to ensure the relative state of the first seat body 11 and the second seat body 12, and also cooperate with the level adjustment.

[0070] Furthermore, the bottom wall of the placement groove 111 is provided with a plurality of through holes: the visual measuring device 100 further includes a locking structure, the locking structure including a plurality of screw connections 51 and a plurality of elastic components 52, the plurality of screw connections 51 pass through the plurality of through holes and are threadedly mounted on the second seat body 12, the plurality of screw connections 51 are located on the peripheral side of the support column 41, and are staggered with the plurality of adjustment components 42; the plurality of elastic components 52 are located in the installation cavity, and are pressed against the wall surface corresponding to the placement groove 111 and the second seat body 12. In this embodiment, the elastic components 52 and the screw connections 51 are combined, so that the first seat body 11 and the second seat body 12 can be locked after leveling, and the elastic preload force can be provided by the elastic components 52.

[0071] The number of the elastic members 52 may correspond to or be different from the number of the screw members 51. The elastic members 52 may be springs, elastic rubbers, spring sheets, etc. In this embodiment, four bolts are provided, and a spring is sleeved on the rod of each bolt in the placement groove 111, thereby forming mutual cooperation between the screw members 51 and the elastic members 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 by the spring and the bolt, so as to finally achieve adjustment of the horizontal plane of the lens.

[0072] In some embodiments, the first seat body 11 and the second seat body 12 can be connected by means of a slide groove and a slider, and the gap between the slide groove and the slider in the first direction can be reasonably set so that the two can be adjusted horizontally within a certain range.

[0073] For further information, please refer to Figure 5 to Figure 6 The optical ruler structure 3 includes a main body 31, a ruler lens 32 and an adjustment ring 33. The main body 31 is arranged in a ring shape. The ruler lens 32 is arranged in the inner hole of the main body 31 and can be rotatably installed along the axis extending in the first direction. The adjustment ring 33 can be rotatably mounted on the outside of the main body 31. The adjustment ring 33 is connected to the ruler lens 32 through a connecting member 34, so that when the adjustment ring 33 is rotated by an external force, it can drive the 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 ruler lens 32 coincides with the optical axis of the optical component 2. When the operator rotates the adjustment ring 33, the ruler lens 32 can be driven to rotate. At this time, the center of the cursor remains unchanged, and the crosshairs of the cursor rotate around the center, so that the cursor can be aligned and adjusted.

[0074] In order to realize the rotation of the ruler lens 32, the ruler lens 32 is installed through 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 for the movement of the connecting member 34, so that when the adjusting ring 33 rotates, the connecting member 34 rotates therewith without interfering with the main body 31.

[0075] In addition, in order to protect the parts, please refer to Figure 6 A seal 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 rotationally sealed fit.

[0076] Please refer again Figure 1 The visual measuring 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, which may be a plurality of LED lights installed at the lower end of the housing of the optical component 2 to play a lighting role, or may be a ring-shaped LED light bar, which is mounted at the lower end of the optical component 2. Figure 1 In the embodiment, the light source component 7 is a separate detachable module, arranged in a ring shape, with a built-in LED lamp, and installed outside the lower end of the optical lens 21.

[0077] Considering that the through holes and shape features of the machined parts are not easy to identify without other reference features, even if LED light sources are added, LED light sources are generally illuminated from the front, which will cause blurred edges. Therefore, in some implementations, please refer to Figure 1 The visual measuring device 100 further includes a backlight panel 6, which is used to be movably arranged on the supporting platform of the CNC machine tool along the second direction. The side of the backlight panel 6 facing the optical component 2 is used to place the product to be inspected; specifically, by adding a backlight on the back of the part, the light source is emitted from the back of the part to avoid the problem of edge blur, thereby improving the measurement accuracy. The backlight panel 6 is arranged to be movable so as to adapt to the position of the processed part, and can be removed when not in use.

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

[0079] In the technical solution of this embodiment, on the one hand, the visual measurement device 100 can be used as a visual inspection to facilitate the measurement of dimensions, and on the other hand, it can confirm the processing texture by enlarging the target screen. Visual measurement does not require contact with the product and can complete the measurement without programming. It is more efficient than probe measurement and can achieve rapid measurement of 2D contours and observation of processing surface texture. At the same time, it is not limited by the probe diameter and can complete online measurement of fine features without the need for off-machine measurement. It can also achieve autonomous measurement during the processing of processed parts by performing AI recognition on visual images.

[0080] The present invention further proposes a CNC machine tool, which includes a visual measuring device 100. The specific structure of the visual measuring device 100 refers to the above embodiment. Since the CNC machine tool adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0081] Specifically, the CNC machine tool further includes a carrier and a control device, a movable tool handle is provided on the carrier, and the control device is electrically connected to the visual measuring device 100 to control the tool handle to move according to the visual measuring device 100. It should be understood that the control device here is a control device built into the CNC machine tool, the visual measuring device 100 provides a visual reference, and coordinate acquisition and position changes are achieved by the functions of the CNC machine tool itself.

[0082] Based on the above implementation, please refer to Figure 8 The present invention proposes a CNC machine tool visual inspection method, which specifically includes the following steps:

[0083] S10, controlling 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 recording the current coordinates as the starting coordinates;

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

[0085] It should be understood that before formally conducting the inspection, the visual measuring device 100 needs to be leveled, and the adjustment ring 33 needs to be rotated to make the cross ruler angle consistent with the machine tool coordinate angle.

[0086] Considering that the color difference between the machined surface and the non-machined surface of the part is not obvious, it may not be convenient to judge during visual inspection. Therefore, the parts are painted with a water-insoluble oil pen before fine processing. In this way, after processing is completed, the non-machined surface retains the color, while the machined surface reveals the color of the material itself. During visual inspection, the contrast between the machined surface and the processed surface can be improved, thereby improving the visual measurement resolution.

[0087] It should be noted that the visual measuring device 100 only plays a visual auxiliary role, and the data and coordinates are recorded by operating the CNC machine tool.

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

[0089] It should be understood that when the CNC machine tool is controlled to take its actual coordinates as the starting point for dimensional detection, the tool is controlled to move linearly 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 handle moves along the edge of the measured angle, and the measured target point is the end point of the trajectory.

[0091] S30, calculating and confirming a measurement value according to the starting coordinates and the target point coordinates.

[0092] The measurement value can be calculated by the target point coordinates and the starting coordinates. For example, the starting point coordinates are (5, 0) and the target point coordinates are (15, 0). In this case, the measurement value is 10 mm. Alternatively, after confirming the actual coordinates, the coordinates can be zeroed. In this case, the starting point coordinates are (0, 0). Therefore, the value of the target point coordinates is the final measurement value.

[0093] For example, taking the measurement of straight-line distance as an example, first move the tool handle to drive the center of the optical cross ruler to align with the zero point of the workpiece, and at the same time record the coordinates of the CNC machine tool and return to zero, then move the tool handle again to make the optical cross ruler reach the measurement target point, and finally record the current system coordinate position of the CNC machine tool, that is, the measured straight-line distance.

[0094] In addition to size detection, daily processing will face the problem of smooth connection between large and small cutters on the same plane. After the milling cutter is processed, the difference in the texture produced by different tools and processing parameters is magnified using an optical lens 21, so that the difference between the cutter textures can be clearly compared. By controlling the movement of the tool handle, the state of the texture at each end can be observed, and the processing parameters of the CNC machine tool can be adjusted according to the detection results of the visual measurement device to achieve smooth connection between large and small cutters.

[0095] It should be noted that the control device provided in the present 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, and the instructions are executed by the at least one processor so that the at least one processor can execute the CNC machine tool visual inspection method in the above-mentioned embodiment one.

[0096] Reference below Fig. 9 , which shows a schematic diagram of the structure of a control device suitable for implementing an embodiment of the present application. The control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions: tablet computers), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig. 9 The control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0097] like Fig. 9 As shown, the control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the control device to communicate with other devices wirelessly or by wire to exchange data. Although the control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0098] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0099] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A visual measuring device for a CNC machine tool, characterized in that: The visual measurement device comprises: A connecting seat, which is used to be detachably mounted on a tool handle of a CNC machine tool and can move with the tool handle of the CNC machine tool; and, an optical component connected to one side of the connection base along the first direction, used to observe the product to be inspected located on the side of the optical component facing away from the connection base, and capable of converting optical signals into digital signals for transmission; and The optical scale structure is arranged on the optical component so as to form a cursor for facilitating positioning when the optical component observes the product to be inspected.

2. The visual measuring device according to claim 1, characterized in that: The optical assembly includes an optical lens and an optical module spaced apart along a first direction, the optical module is connected to the connecting seat, and the optical scale structure is arranged on a side of the optical lens facing toward or away from the optical module.

3. The visual measuring device according to claim 2, characterized in that: The optical lens, the optical module, the optical scale structure and the connecting seat are matched together through a seal.

4. The visual measuring device according to claim 1, characterized in that: The connecting seat comprises: A first seat body is used for being detachably mounted on a tool handle of a CNC machine tool; and A second base, one end of the second base along the first direction is connected to the first base, and the other end is connected to the optical component. The second base is adjustable relative to the first base to adjust the flatness of the optical component in a plane perpendicular to the first direction.

5. The visual measuring device according to claim 4, characterized in that: The end surface of the first base body facing the second base body is concavely provided with a placement groove, and the peripheral side wall of the first base body is provided with a plurality of through holes connected with the placement groove; The visual measurement device also includes a leveling structure, and the leveling structure includes: A support column, one end of which extends into the placement groove and the other end is fixed to the second seat body; A plurality of adjusting members, each of which has one end fixed to the peripheral side surface of the support column at the inner end portion of the placement groove, and the other end having an external thread on the outer surface thereof and extending out of the placement groove from the corresponding through hole; and A plurality of adjusting nuts are threadably matched with the portions of the adjusting members extending out of the through holes.

6. The visual measuring device according to claim 5, characterized in that: The bottom wall of the placement groove is provided with a plurality of through holes: The visual measurement device further includes a locking structure, and the locking structure includes: a plurality of screw-connecting members, passing through the plurality of through holes and being threadedly mounted on the second seat body, the plurality of screw-connecting members being located on the peripheral side of the support column and staggered with the plurality of adjusting members; and, A plurality of elastic members are located in the installation cavity and are pressed against the wall surface corresponding to the placement groove and the second seat body.

7. The visual measuring device according to claim 1, characterized in that: The optical scale structure comprises: The main body is arranged in a ring shape; A ruler lens is disposed in the inner hole of the main body and can be rotatably mounted along an axis extending in the first direction; and An adjusting ring is rotatably mounted on the outside of the main body, and the adjusting ring is connected to the optical ruler lens through a connecting piece so that when the adjusting ring is rotated by an external force, the optical ruler lens can be driven to rotate synchronously.

8. The visual measuring device according to claim 1, characterized in that: The visual measuring device further comprises a backlight plate, which is used to be movably arranged on a bearing platform of a numerically controlled machine tool along a second direction, and a side of the backlight plate facing the optical component is used to place a product to be inspected; and / or, The visual measurement device further includes a light source component, and the light source component is disposed on the optical component.

9. A CNC machine tool, characterized in that: include: A carrying platform, wherein a movably arranged knife handle is disposed on the carrying platform; The visual measuring device according to any one of claims 1 to 8; as well as, A control device is electrically connected to the visual measuring device to control the movement of the tool handle according to the visual measuring device.

10. A method for visual inspection of a CNC machine tool, based on the CNC machine tool according to claim 9, characterized in that: The CNC machine tool visual inspection method 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 inspected, and recording the current coordinates as the starting coordinates; Control the visual measurement device to continue moving to the measurement target point of the product to be inspected, and record the current coordinates as the target point coordinates; A confirmed measurement value is calculated based on the starting coordinates and the target point coordinates.

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