A numerical control machine tool wire harness length detection device based on laser measurement

Abstract

The application relates to the technical field of laser measurement, in particular to a numerical control machine tool wire harness length detection device based on laser measurement, which comprises a measuring table and a laser meter, and the top end of the measuring table is fixedly connected with a measuring cabinet. The application is characterized in that the corresponding vertical roller is driven to move upwards by a measuring mechanism, the wire harness is pulled to run against the bottom of the fixed roller, when the laser meter detects that the wire harness reaches the preset length, a signal is sent to the controller, the current measuring mechanism is controlled to stop running, at this time, the bottom of the fixed roller forms a stable distance point, then the moving mechanism drives the laser meter to move horizontally below the next fixed roller, and the wire harness is continuously measured in the moving process, so that the bottom of the fixed roller becomes a new distance point, meanwhile, the corresponding vertical roller is driven to move upwards by the measuring mechanism, the wire harness is continuously pulled and conveyed, and through the multi-station alternate action, the continuous segmented measurement of the numerical control machine tool wire harness is realized.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, and in particular to a CNC machine tool wire harness length detection device based on laser measurement. Background Technology

[0002] CNC machine tool wiring harnesses are the connection carriers of the machine tool electrical system. They are composed of multiple wires and connectors and are characterized by various specifications and lengths. In the process of mass production or fixed-length cutting of wiring harnesses, it is necessary to accurately measure the length of the wiring harness to meet the wiring production requirements of different machine tool models. The laser meter mainly consists of a laser emitting module, a photoelectric receiving module, a signal processing unit, and a display and control terminal. When in use, the wiring harness is passed horizontally through the laser detection area of ​​the equipment. The laser beam performs a non-contact scan on the surface of the wiring harness. After photoelectric conversion and signal processing, the length of the wiring harness is calculated and displayed in real time, realizing online accurate detection of the wiring harness length.

[0003] Existing laser meter counters, when measuring the length of CNC machine tool wire harnesses, are limited by the conflict between the fixed detection station and the continuous operation of the wire harness. They require intermittent shutdowns under various conditions such as fixed-distance marking, fixed-length cutting, segmented coding, and online sampling inspection. The fundamental reason is that laser detection requires maintaining a stable relative position between the detection head and the wire harness, while marking or switching actions require the wire harness to be relatively stationary at the operation point. If the machine is not stopped, wire harness slippage will lead to inaccurate distance measurement and mark offset. However, frequent start-stop operations not only interrupt the production line cycle and reduce detection efficiency, but also easily cause sudden changes in wire harness tension and cumulative metering errors.

[0004] Therefore, a laser-based CNC machine tool wire harness length detection device is proposed to solve the above problems. Summary of the Invention

[0005] To address the technical problem of frequent machine stops required during online distance measurement of CNC machine tool wiring harnesses, this invention provides a laser-based CNC machine tool wiring harness length detection device.

[0006] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a laser measurement-based CNC machine tool wire harness length detection device, which includes a measuring platform and a laser meter. A measuring cabinet is fixedly connected to the top of the measuring platform, and a front plate is fixedly connected to the front side of the measuring cabinet. A fixed frame is fixedly connected to the top of the measuring platform relative to the front side of the front plate. A moving mechanism for driving the laser meter to move laterally is provided on the fixed frame. The front plate has several vertical slots equidistantly spaced through it. Each vertical slot has a vertical block slidably connected to its inner side. Each vertical block has a vertical roller rotatably connected to its front side. The front plate has four fixed rollers rotatably connected to it. The vertical slots are positioned between the four fixed rollers. The vertical rollers are located below the fixed rollers. During measurement, the CNC machine tool wiring harness passes between the vertical rollers and the fixed rollers. The front plate also has a clamping mechanism for fixing the position of the CNC machine tool wiring harness. The rear of the front plate has a measuring mechanism that sequentially drives several vertical rollers to move upward.

[0007] In the above technical solution, the moving mechanism further includes a moving motor, an upper threaded rod, and a moving block. The upper threaded rod is rotatably connected to the inner side of the fixed frame, the moving block is laterally slidably connected to the inner side of the fixed frame, the laser meter is tilted and fixedly connected to the rear side of the moving block, the upper threaded rod is threadedly connected to the inner side wall of the moving block, the moving motor is fixedly connected to the side wall of the fixed frame, and the output end of the moving motor passes through the inner side of the fixed frame and is fixedly connected to the side wall of the upper threaded rod. The moving motor is equipped with an encoder, which provides feedback on the rotation angle of the upper threaded rod. The control unit calculates the lateral displacement of the laser meter based on the feedback signal from the encoder and controls the moving motor to precisely position the laser meter below the next fixed roller. During the measurement process, the output end of the moving motor drives the upper threaded rod to rotate inside the fixed frame. Since the upper threaded rod is threadedly connected to the moving block, and the moving block is laterally slidably constrained inside the fixed frame, the rotation of the upper threaded rod drives the moving block to slide laterally along the fixed frame, thereby moving the laser meter between adjacent fixed rollers. The moving motor is equipped with an encoder, which detects the rotation angle of the motor output shaft in real time and converts it into a pulse signal to be fed back to the controller. The controller calculates the lateral displacement of the laser meter based on the correspondence between the number of pulses and the thread lead. When the cumulative number of pulses reaches a preset threshold, the controller determines that the laser meter has reached the target position below the next fixed roller and then controls the moving motor to stop operating, achieving precise lateral movement.

[0008] In the above technical solution, the clamping mechanism further includes an upper electric telescopic cylinder and a clamping plate. Four upper electric telescopic cylinders and four clamping plates are provided. The four upper electric telescopic cylinders are fixedly connected to the top of the measuring table. The upper electric telescopic cylinders are located directly below the fixed roller. The four clamping plates are fixedly connected to the output ends of the four upper electric telescopic cylinders. By setting up the clamping mechanism, the segmented CNC machine tool wire harness can be clamped and fixed at the bottom end of the fixed roller, thereby ensuring that the subsequent measurement accuracy will not be affected. At the same time, during the fixed-distance cutting, it will not affect the normal pulling of the subsequent CNC machine tool wire harness.

[0009] In the above technical solution, the measuring mechanism further includes a rear frame, a push block, and a cylinder. A pair of brackets are fixedly connected to the top of the measuring platform relative to the inside of the measuring cabinet. A pair of slide rails are fixedly connected laterally between the front sides of the brackets. A slider is slidably connected to the inner side of each slide rail. The rear frame is fixedly connected to the front side of the two sliders. The push block is slidably connected to the inner side of the rear frame. The push block is positioned below one of the vertical blocks. A lower threaded rod is rotatably connected to the inner side of the rear frame. The lower threaded rod is threadedly connected to the inner side wall of the push block. A drive motor is fixedly connected to the bottom of the rear frame. The output end of the drive motor is fixedly connected to the bottom end of the lower threaded rod through the inner side of the rear frame. The drive motor is electrically connected to the laser meter through a controller. A groove is provided at the top of the measuring platform relative to the position below the drive motor. The drive motor is positioned in the groove. The groove avoids obstructing the normal movement of the drive motor. The cylinder is fixedly connected to the front side of the bracket. A middle block is fixedly connected to the middle of the rear side of the rear frame. The output end of the cylinder is fixedly connected to the side wall of the middle block. During the measurement process, the laser meter detects the length of the continuously passing wire bundle in real time. When the cumulative measured length reaches the preset distance value, the laser meter sends a position signal to the controller. After receiving the signal, the controller controls the drive motor to stop running. During the operation of the drive motor, its output end drives the lower threaded rod to rotate, which drives the push block to slide longitudinally upward along the inner side of the rear frame through the thread transmission. During the upward movement of the push block, it pushes the vertical block, causing the vertical block and the vertical roller to move upward together. When the vertical roller moves upward, it drives the wire bundle to be lifted upward. When the drive motor stops running in response to the controller's command, the push block, the vertical block and the vertical roller stop synchronously at the current position. A tension constraint is formed between the lifted section of the wire bundle and the fixed roller, so that the fixed distance point of the wire bundle that stops moving upward is exactly positioned directly below the fixed roller, so that marking or cutting operations can be performed at this fixed distance point.

[0010] In the above technical solution, furthermore, a side frame is fixedly connected to the rear side of the front plate relative to the side wall of the vertical groove. A positioning plate is slidably connected to the inner side of the side frame. A positioning rod is fixedly connected to the rear side of the positioning plate. The positioning rod passes through the rear side of the side frame. Several positioning springs are fixedly connected between the rear side of the positioning plate and the inner side of the side frame. The rear end of the positioning rod is set as a smooth arc surface. Several right-angled grooves with inclined surfaces are equidistantly opened on the side wall of the positioning plate. A horizontal groove is opened on the side wall of the vertical block. A horizontal block is slidably connected to the inner side of the horizontal groove. The top of the horizontal block is inclined. A return spring is fixedly connected between the inner side of the horizontal groove and the side wall of the horizontal block. Through the above structure, the position of the vertical roller after lifting can be restricted, thereby ensuring the stability of the position of the vertical roller after moving upward. A release mechanism for releasing the position of the positioning rod is provided on the rear side of the front plate relative to the side wall of the side frame.

[0011] In the above technical solution, the release mechanism further includes an L-shaped plate, which is fixedly connected to the rear side of the front plate relative to the side wall of the side frame. A lower electric telescopic cylinder is fixedly connected to the side wall of the L-shaped plate. The output end of the lower electric telescopic cylinder passes through the L-shaped plate and is fixedly connected to the extrusion block. The side wall of the extrusion block is provided with a release groove. The front side of the extrusion block is tightly fitted with the rear end of the positioning rod. Through the setting of the lower electric telescopic cylinder and the extrusion block, the lower electric telescopic cylinder can quickly release the limit of the extrusion block, which can quickly release the pushing constraint on the vertical roller, so that the vertical roller can quickly fall back to its original position under the action of gravity, thereby releasing the marked segmented CNC machine tool wire harness, which facilitates the smooth traction and winding of the rear winding machine.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the process of wire harness spacing and segmentation of CNC machine tools, the present invention uses a laser meter to illuminate the wire harness continuously conveyed from the bottom of the fixed roller at an angle from the front of the fixed roller, and to measure it in real time. The bottom position of the fixed roller is used as the spacing point. Then, the measuring mechanism drives the corresponding vertical roller to move upward, pulling the wire harness to run against the bottom of the fixed roller. When the laser meter detects that the wire harness has reached the preset length, it sends a signal to the controller to control the current measuring mechanism to stop running. At this time, a stable spacing point is formed at the bottom of the fixed roller. Then, the moving mechanism drives the laser meter to move horizontally under the next fixed roller, and continues to measure the wire harness during the movement, so that the bottom of the fixed roller becomes the new spacing point. At the same time, the measuring mechanism drives the corresponding vertical roller to move upward, and continues to pull and convey the wire harness. Through the alternating action of multiple stations, continuous segmentation measurement of CNC machine tool wire harnesses is realized. Therefore, cutting or marking equipment can be installed at the spacing point under the fixed roller to perform non-stop spacing cutting or marking of the continuously running wire harness.

[0013] 2. The present invention, through the setting of the lower electric telescopic cylinder and the extrusion block, enables the lower electric telescopic cylinder to quickly release the limit of the extrusion block, which can quickly release the pushing constraint on the vertical roller, allowing the vertical roller to quickly fall back to its original position under the action of gravity, thereby releasing the marked segmented CNC machine tool wire harness, which facilitates the smooth traction and winding of the downstream winding machine. At the same time, the release action of the vertical roller at this station is independent of the segmented distance measurement at another station, and will not affect the normal segmented distance measurement and continuous transmission of the downstream CNC machine tool wire harness. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the front of the measuring platform and measuring cabinet of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the front plate, vertical tube, fixing frame and vertical roller side of the present invention; Figure 3 This is a partial three-dimensional structural diagram of the front plate, vertical roller, and fixed roller after frontal adjustment according to the present invention. Figure 4This is a partial three-dimensional structural diagram of the bracket, measuring platform, front plate, and rear frame of the present invention. Figure 5 For the appendix Figure 4 A magnified view of the structure at point A in the middle; Figure 6 This is a rear-view partial cross-sectional three-dimensional structural diagram of the fixed frame, laser meter, and moving motor of the present invention. Figure 7 This is a front perspective structural diagram of the bracket, rear frame, cylinder, and slide rail of the present invention. Figure 8 This is a rear-view partial cross-sectional three-dimensional structural diagram of the fixed roller, vertical roller, and vertical block of the present invention; Figure 9 For the appendix Figure 8 A magnified schematic diagram of the structure at point B in the middle; Figure 10 This is a three-dimensional structural diagram of the side frame and extrusion block of the present invention; Figure 11 This is a schematic diagram of the rear view of the separation of the side frame and L-shaped plate in the three-dimensional structure of the present invention.

[0015] In the diagram: 1. Measuring platform; 2. Laser meter counter; 3. Measuring cabinet; 4. Front panel; 5. Fixed frame; 6. Vertical groove; 7. Vertical block; 8. Vertical roller; 9. Fixed roller; 10. Moving motor; 11. Upper threaded rod; 12. Moving block; 13. Upper electric telescopic cylinder; 14. Clamping plate; 15. Rear frame; 16. Push block; 17. Cylinder; 18. Bracket; 19. Slide rail; 20. Slider; 21. Lower threaded rod; 22. Drive motor; 23. Groove; 24. Middle block; 25. Side frame; 26. Positioning plate; 27. Positioning rod; 28. Positioning spring; 29. ​​Horizontal groove; 30. Horizontal block; 31. Return spring; 32. Right angle groove; 33. L-shaped plate; 34. Lower electric telescopic cylinder; 35. Extrusion block; 36. Release slant groove. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0018] In practical use, it was found that the existing laser meter counter 2, when performing length detection on CNC machine tool wire harnesses, is limited by the contradiction between the fixed detection station and the continuous operation of the wire harness. It requires intermittent shutdowns under various working conditions such as fixed-distance marking, fixed-length cutting, segmented inkjet coding, and online sampling inspection. The fundamental reason is that laser detection requires maintaining a stable relative position between the detection head and the wire harness, while marking or switching actions require the wire harness to be relatively stationary at the operation point. If the machine is not stopped, wire harness slippage will lead to inaccurate distance measurement and mark offset. However, frequent start-stop not only interrupts the production line cycle and reduces detection efficiency, but also easily causes sudden changes in wire harness tension and cumulative metering errors. To solve the above problems, the following structure was invented.

[0019] like Figures 1-11 The device shown is a laser-based CNC machine tool wire harness length detection device, including a measuring platform 1 and a laser meter 2. A measuring cabinet 3 is fixedly connected to the top of the measuring platform 1, and a front plate 4 is fixedly connected to the front side of the measuring cabinet 3. A fixed frame 5 is fixedly connected to the top of the measuring platform 1 relative to the front side of the front plate 4. The fixed frame 5 is equipped with a moving mechanism for driving the laser meter 2 to move laterally. The laser meter 2 is based on the Doppler velocimetry principle and extracts velocity information by detecting the frequency shift of scattered light generated by the relative motion between the laser irradiation point and the wire harness surface. When the laser meter 2 moves laterally under the stationary wire harness, there is still relative motion between the laser head and the wire harness surface. The signal processing system integrates this relative velocity over time to obtain the relative displacement and calculate the wire harness length, thereby realizing non-contact continuous measurement.

[0020] The front plate 4 has several vertical slots 6 equidistantly through the front side. Vertical blocks 7 are longitudinally slidably connected to the inner side of each vertical slot 6. Vertical rollers 8 are rotatably connected to the front side of each vertical block 7. Four fixed rollers 9 are rotatably connected to the front side of the front plate 4. The vertical slots 6 are positioned between the four fixed rollers 9. The vertical rollers 8 are located below the fixed rollers 9. During measurement, the CNC machine tool wiring harness passes between the vertical rollers 8 and the fixed rollers 9. The front plate 4 is also equipped with a clamping mechanism for fixing the position of the CNC machine tool wiring harness. The rear side of the front plate 4 is equipped with a measuring mechanism that sequentially drives several vertical rollers 8 to move upward.

[0021] The moving mechanism includes a moving motor 10, an upper threaded rod 11, and a moving block 12. The upper threaded rod 11 is rotatably connected to the inside of the fixed frame 5, and the moving block 12 is laterally slidably connected to the inside of the fixed frame 5. The laser meter 2 is tilted and fixedly connected to the rear side of the moving block 12. The upper threaded rod 11 is threadedly connected to the inner wall of the moving block 12. The moving motor 10 is fixedly connected to the side wall of the fixed frame 5, and the output end of the moving motor 10 passes through the inner side of the fixed frame 5 and is fixedly connected to the side wall of the upper threaded rod 11. The moving motor 10 is equipped with an encoder, which is used to provide feedback on the rotation angle of the upper threaded rod 11. The control unit calculates the lateral displacement of the laser meter counter 2 based on the feedback signal from the encoder and controls the moving motor 10 to precisely position the laser meter counter 2 below the next fixed roller 9. During the measurement process, the moving motor 10 drives the upper threaded rod 11 to rotate inside the fixed frame 5. Through the threaded transmission, the moving block 12, which is subject to lateral sliding constraint, slides, thereby causing the laser meter counter 2 to move laterally between adjacent fixed rollers 9. The moving motor 10 is equipped with an encoder, which can detect the rotation angle of the output shaft in real time and convert it into a pulse signal to be fed back to the controller. The controller calculates the lateral displacement of the laser meter counter 2 based on the correspondence between the number of pulses and the thread lead. When the cumulative number of pulses reaches a preset threshold, the controller determines that the laser meter counter 2 has reached the target position below the next fixed roller 9 and then controls the moving motor 10 to stop running, thus achieving precise lateral movement at a fixed distance.

[0022] The clamping mechanism includes an upper electric telescopic cylinder 13 and a clamping plate 14. There are four upper electric telescopic cylinders 13 and four clamping plates 14. The four upper electric telescopic cylinders 13 are fixedly connected to the top of the measuring table 1. The upper electric telescopic cylinders 13 are located directly below the fixed roller 9. The four clamping plates 14 are fixedly connected to the output ends of the four upper electric telescopic cylinders 13.

[0023] The measuring mechanism includes a rear frame 15, a push block 16, and a cylinder 17. A pair of brackets 18 are fixedly connected to the top of the measuring platform 1 relative to the inside of the measuring cabinet 3. A pair of slide rails 19 are fixedly connected laterally between the front sides of the brackets 18. Slider 20s are slidably connected laterally to the inner side of each slide rail 19. The rear frame 15 is fixedly connected to the front side of the two sliders 20. The push block 16 is slidably connected to the inner side of the rear frame 15. The push block 16 is located below one of the vertical blocks 7. A lower threaded rod 21 is rotatably connected to the inner side of the rear frame 15. The lower threaded rod 21 is threaded through and connected to the inner wall of the push block 16. A drive motor 22 is fixedly connected to the bottom of the rear frame 15. The output end of the drive motor 22 passes through the inner side of the rear frame 15 and is fixedly connected to the bottom of the lower threaded rod 21. The drive motor 22 is electrically connected to the laser meter 2 through a controller.

[0024] A groove 23 is provided at the top of the measuring platform 1 relative to the position below the drive motor 22. The drive motor 22 is set in the groove 23. The cylinder 17 is fixedly connected to the front side of the bracket 18. A middle block 24 is fixedly connected to the middle of the rear side of the rear frame 15. The output end of the cylinder 17 is fixedly connected to the side wall of the middle block 24.

[0025] A side frame 25 is fixedly connected to the rear side of the front plate 4 relative to the side wall of the vertical slot 6. A positioning plate 26 is slidably connected to the inner side of the side frame 25. A positioning rod 27 is fixedly connected to the rear side of the positioning plate 26 and passes through the rear side of the side frame 25. Several positioning springs 28 are fixedly connected between the rear side of the positioning plate 26 and the inner side of the side frame 25. The rear end of the positioning rod 27 is set as a smooth arc surface. Several right-angled slots 32 with inclined surfaces are equidistantly opened on the side wall of the positioning plate 26. A horizontal slot 29 is opened on the side wall of the vertical block 7. A horizontal block 30 is slidably connected to the inner side of the horizontal slot 29. The top of the horizontal block 30 is inclined. A return spring 31 is fixedly connected between the inner side of the horizontal slot 29 and the side wall of the horizontal block 30. A release mechanism for releasing the position of the positioning rod 27 is provided on the rear side of the front plate 4 relative to the side wall of the side frame 25.

[0026] When performing fixed-distance laser measurement on CNC machine tool wiring harness, the CNC machine tool wiring harness is first passed between the fixed roller 9 and the vertical roller 8, and the end of the CNC machine tool wiring harness is pulled out from the outermost fixed roller 9. (It should be noted that when the CNC machine tool wiring harness passes between the fixed roller 9 and the vertical roller 8, the laser meter 2 continuously measures the passing CNC machine tool wiring harness to ensure the accuracy of subsequent distance measurement. At the same time, the laser meter 2 is located in the initial position, that is, directly below the second fixed roller 9.) Then, the upper electric telescopic cylinder 13 at the outermost end is started to drive the clamping plate 14 to move upward, clamping and fixing the CNC machine tool wiring harness on the outermost fixed roller 9. Then, the equipment can be started to perform fixed-distance measurement on the CNC machine tool wiring harness. First, the drive motor 22 is controlled to drive the lower threaded rod 21 to rotate, which in turn drives the threaded push block 16 to move upward, thereby pushing the vertical block 7 and the vertical roller 8 to slide upward in the vertical groove 6. Since the end of the CNC machine tool wiring harness is clamped on the fixed roller 9, the upward movement of the vertical roller 8 will pull the other end of the CNC machine tool wiring harness to move upward along with the vertical roller 8. (During the upward movement of the vertical block 7, the horizontal block 30 will also move upward. At this time, the horizontal block 30 will move to the bottom of the positioning plate 26, and then the inclined surface of the right-angle groove 32 on the positioning plate 26 will squeeze the inclined surface of the horizontal block 30, thereby pushing the horizontal block 30 into the horizontal groove 29, and compressing the return spring 31 at the same time. Then the horizontal block 30 moves into the next right-angle groove 32, thereby releasing the pressure on the horizontal block 30.) The compression is followed by the insertion under the elastic force of the return spring 31. Then, as the vertical block 7 continues to move upward, it will drive the vertical block 7 and the horizontal block 30 to continue to move upward, repeating the above operation until the drive motor 22 stops running, driving the horizontal block 30 to be inserted into the corresponding right-angle slot 32, restricting the downward movement of the vertical block 7. At the same time, the laser meter 2 performs real-time length detection on the continuously passing wire bundle. When the cumulative measured length reaches the preset distance value, the laser meter 2 sends an position signal to the controller. After receiving the signal, the controller controls the drive motor 22 to stop running. At this point, the area below the fixed roller 9 serves as a fixed distance point. After the controller stops the drive motor 22, it starts the moving motor 10 to rotate the upper threaded rod 11, thereby moving the threaded moving block 12 and the laser meter counter 2. The moving motor 10 calculates the lateral displacement of the laser meter counter 2 based on the encoder feedback signal and controls the moving motor 10 to accurately position the laser meter counter 2 below the next fixed roller 9. During the movement, the wire harness is continuously measured to make the bottom of the fixed roller 9 the new fixed distance point. At the same time as the moving motor 10 starts, the controller controls the cylinder 17 to start pulling the middle block 24 and the rear frame 15 to move (simultaneously). The upper electric telescopic cylinder 13 below the second fixed roller 9 is activated, driving the clamping plate 14 to move upward and clamp the CNC machine tool wire harness. If cutting is required, the clamping plate 14 can be released for cutting after the next section of the CNC machine tool wire harness is segmented at a fixed distance. At the same time, the drive motor 22 reverses, driving the push block 16 to move downward and reset. Then, the push block 16 moves to the bottom of another vertical block 7. After the laser meter 2 is in place, the drive motor 22 is controlled to drive the corresponding vertical block 7 and vertical roller 8 to move upward. The above operation is repeated to segment the next section of the CNC machine tool wire harness at a fixed distance. This process is repeated to achieve segmentation of the CNC machine tool wire harness at a fixed distance without stopping the machine.

[0027] In summary, through the design of the above structure, during the wire harness spacing and segmentation process of CNC machine tools, the laser meter 2 is tilted and illuminated from the front of the fixed roller 9 to measure the continuously conveyed wire harness at the bottom in real time, and the bottom position of the fixed roller 9 is used as the spacing point. Then, the measuring mechanism drives the corresponding vertical roller 8 to move upward, pulling the wire harness to run against the bottom of the fixed roller 9. When the laser meter 2 detects that the wire harness has reached the preset length, it sends a signal to the controller to control the current measuring mechanism to stop running. At this time, a stable spacing point is formed at the bottom of the fixed roller 9. Subsequently, the moving mechanism drives the laser meter 2 to move laterally to the bottom of the next fixed roller 9, continuously measuring the wire harness during the movement, making the bottom of the fixed roller 9 the new spacing point. At the same time, the measuring mechanism drives the corresponding vertical roller 8 to move upward, continuing to pull and convey the wire harness. Through the alternating action of multiple stations, continuous segmentation measurement of CNC machine tool wire harnesses is realized. Therefore, cutting or marking equipment can be installed at the spacing point below the fixed roller 9 to perform non-stop spacing cutting or marking of continuously running wire harnesses.

[0028] Based on the above embodiments, it was found during use that although the above can solve the problem of machine stoppage during fixed-distance segmented measurement and realize continuous conveying and segmented processing of wire harness, it cannot automatically release the limit on the CNC machine tool wire harness after segmentation marking. To solve the above problem, the above structure has been further improved.

[0029] The release mechanism includes an L-shaped plate 33, which is fixedly connected to the rear side of the front plate 4 relative to the side wall of the side frame 25. A lower electric telescopic cylinder 34 is fixedly connected to the side wall of the L-shaped plate 33. The output end of the lower electric telescopic cylinder 34 passes through the L-shaped plate 33 and is fixedly connected to the pressing block 35. A release groove 36 is opened on the side wall of the pressing block 35. The front side of the pressing block 35 is tightly fitted with the rear end of the positioning rod 27.

[0030] When it is necessary to release the position of the vertical roller 8 and release the pushing constraint on the marked CNC machine tool wire harness, the corresponding lower electric telescopic cylinder 34 is activated to drive the pressing block 35 to move, thereby moving the release groove 36 to the position behind the positioning rod 27, thus gradually releasing the pressure on the positioning rod 27. Subsequently, under the elastic force of the positioning spring 28, the positioning plate 26 is pulled backward, thereby driving the positioning plate 26 and the right angle groove 32 to move away from the horizontal block 30, releasing the sliding restriction on the horizontal block 30. Then, under the weight of the horizontal block 30, the vertical block 7 and the vertical roller 8, they slide downward in the vertical groove 6. At this time, the rear winding machine can then wind up the CNC machine tool wire harness.

[0031] In summary, the above structural design allows the lower electric telescopic cylinder 34 to quickly release the limiting position of the extrusion block 35, thereby quickly releasing the pushing constraint on the vertical roller 8. This allows the vertical roller 8 to quickly fall back to its original position under gravity, thus releasing the marked segmented CNC machine tool wire harness. This facilitates smooth traction and winding by the downstream winding machine. At the same time, the release action of the vertical roller 8 at this station is independent of the segmented distance measurement at another station, and will not affect the normal segmented distance measurement and continuous transmission of the downstream CNC machine tool wire harness.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0033] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A laser-based CNC machine tool wire harness length detection device, comprising a measuring platform (1) and a laser meter (2), characterized in that, The measuring platform (1) is fixedly connected to the top of the measuring cabinet (3), and the measuring cabinet (3) is fixedly connected to the front side of the front panel (4). The top of the measuring platform (1) is fixedly connected to the front side of the front panel (4) with a fixed frame (5). The fixed frame (5) is provided with a moving mechanism for driving the laser meter (2) to move laterally. The front plate (4) has three vertical slots (6) equidistantly through the front side. Each vertical slot (6) has a vertical block (7) slidably connected to its inner side. Each vertical block (7) has a vertical roller (8) rotatably connected to its front side. The front plate (4) has four fixed rollers (9) rotatably connected to its front side. The vertical slots (6) are evenly distributed between the fixed rollers (9). The vertical rollers (8) are initially positioned below the fixed rollers (9). During measurement, the CNC machine tool wire harness passes between the vertical rollers (8) and the fixed rollers (9). The front plate (4) also has a clamping mechanism for fixing the position of the wire harness, which corresponds one-to-one with the fixed rollers (9) and is located directly below the fixed rollers (9). The front plate (4) has a measuring mechanism on its rear side that sequentially drives the vertical rollers (8) to move upward. The measuring mechanism includes a rear frame (15), a push block (16), and a cylinder (17). The push block (16) is longitudinally slidably connected to the inner side of the rear frame (15). A lower threaded rod (21) is rotatably connected to the inner side of the rear frame (15). The lower threaded rod (21) is threaded through and connected to the inner wall of the push block (16). A drive motor (22) is fixedly connected to the bottom end of the rear frame (15). The output end of the drive motor (22) passes through the inner side of the rear frame (15) and is fixedly connected to the bottom end of the lower threaded rod (21). A pair of brackets (18) are fixedly connected to the top of the measuring platform (1) relative to the inside of the measuring cabinet (3). The cylinder (17) is fixedly connected to the front side of one of the brackets (18), and a middle block (24) is fixedly connected to the middle of the rear side of the rear frame (15). The output end of the cylinder (17) is fixedly connected to the side wall of the middle block (24). The push block (16) can move laterally from the rear frame (15) and stop below any of the vertical blocks (7). A side frame (25) is fixedly connected to the rear side of the front plate (4) relative to the side wall of each vertical groove (6). A positioning plate (26) is slidably connected to the inner side of the side frame (25). A positioning rod (27) is fixedly connected to the rear side of the positioning plate (26). The positioning rod (27) passes through the rear side of the side frame (25). Several positioning springs (28) are fixedly connected between the rear side of the positioning plate (26) and the inner side of the side frame (25). The rear end of the positioning rod (27) is set as a smooth arc surface. Several right-angled grooves (32) with inclined surfaces are equidistantly opened on the side wall of the positioning plate (26). The vertical block (7) has a horizontal groove (29) on its side wall. A horizontal block (30) is slidably connected to the inside of the horizontal groove (29). The top of the horizontal block (30) is inclined. A reset spring (31) is fixedly connected between the inside of the horizontal groove (29) and the side wall of the horizontal block (30). The rear side of the front plate (4) is provided with a release mechanism for releasing the position of the positioning rod (27) relative to the side wall of the side frame (25).

2. The laser-based CNC machine tool wire harness length detection device according to claim 1, characterized in that, The moving mechanism includes a moving motor (10), an upper threaded rod (11), and a moving block (12). The upper threaded rod (11) is rotatably connected to the inside of the fixed frame (5). The moving block (12) is laterally slidably connected to the inside of the fixed frame (5). The laser meter (2) is obliquely fixedly connected to the rear side of the moving block (12). The upper threaded rod (11) is threadedly connected to the inner wall of the moving block (12). The moving motor (10) is fixedly connected to the side wall of the fixed frame (5). The output end of the moving motor (10) passes through the inside of the fixed frame (5) and is fixedly connected to the side wall of the upper threaded rod (11). The moving motor (10) is equipped with an encoder, which is used to provide feedback on the rotation angle of the upper threaded rod (11). The control unit calculates the lateral displacement of the laser meter counter (2) based on the feedback signal from the encoder and controls the moving motor (10) to accurately position the laser meter counter (2) below the next fixed roller (9).

3. The laser-based CNC machine tool wire harness length detection device according to claim 1, characterized in that, The clamping mechanism includes an upper electric telescopic cylinder (13) and a clamping plate (14). There are four upper electric telescopic cylinders (13) and four clamping plates (14). The four upper electric telescopic cylinders (13) are fixedly connected to the top of the measuring table (1). The upper electric telescopic cylinders (13) are located directly below the fixed roller (9). The four clamping plates (14) are fixedly connected to the output ends of the four upper electric telescopic cylinders (13).

4. The laser-based CNC machine tool wire harness length detection device according to claim 1, characterized in that, A pair of slide rails (19) are horizontally fixedly connected between the front sides of the bracket (18). Slider (20) is horizontally slidably connected to the inner side of each slide rail (19). The rear frame (15) is fixedly connected to the front side of the two sliders (20). The drive motor (22) is electrically connected to the laser meter (2) through the control unit.

5. The CNC machine tool wire harness length detection device based on laser measurement according to claim 1, characterized in that, The top of the measuring platform (1) is provided with a groove (23) at a position below the drive motor (22), and the drive motor (22) is located in the groove (23).

6. The laser-based CNC machine tool wire harness length detection device according to claim 1, characterized in that, The release mechanism includes an L-shaped plate (33), which is fixedly connected to the rear side of the front plate (4) relative to the side wall of the side frame (25). A lower electric telescopic cylinder (34) is fixedly connected to the side wall of the L-shaped plate (33). The output end of the lower electric telescopic cylinder (34) passes through the L-shaped plate (33) and is fixedly connected to the pressing block (35). The side wall of the pressing block (35) is provided with a release groove (36). The front side of the pressing block (35) is tightly fitted with the rear end of the positioning rod (27).

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