Lightweight alloy workpiece size measuring device based on optical measurement

Abstract

The invention relates to the technical field of workpiece optical dimension measurement, in particular to a lightweight alloy workpiece dimension measuring device based on optical measurement, which comprises a supporting mechanism, a shading mechanism and a measuring mechanism. The supporting mechanism fixes a workpiece through an electromagnetic adsorption disc, and liquid is rapidly discharged through a conical supporting disc and a flow guide hole. A dust collection net is arranged in the shading mechanism and cooperates with a rotating brush to clean the surface of a workpiece, and dust interference is avoided. And the measuring mechanism adopts an optical measuring instrument capable of horizontally moving and rotating, so that multi-angle dimension detection is realized. The device switches a cleaning mode and a measuring mode by electromagnetically driving the connecting rod, integrates a nozzle flushing function, and effectively improves the measuring precision and efficiency.

Description

Technical Field

[0001] This invention relates to the field of optical dimension measurement technology for workpieces, and in particular to a lightweight alloy workpiece dimension measurement device based on optical measurement. Background Technology

[0002] In the field of industrial inspection, optical measuring instruments are widely used for dimensional inspection of lightweight ferromagnetic alloy workpieces due to their non-contact, high precision, and high response speed characteristics. In the precision dimensional measurement of alloy workpieces, dust and particulate matter adhering to the workpiece surface can severely affect the detection accuracy of optical measuring equipment. Traditional solutions mainly rely on manual cleaning or compressed air purging. However, manual cleaning is inefficient and poses a risk of secondary contamination, while compressed air purging is difficult to completely remove fine dust and can easily cause dust to diffuse within the measuring chamber. Although existing measuring equipment is equipped with dust covers and other structures, it cannot achieve real-time dust removal during the measurement process, resulting in continuous dust accumulation during repeated measurements.

[0003] Therefore, we propose a lightweight alloy workpiece dimension measuring device based on optical measurement. Summary of the Invention The purpose of this invention is to provide a lightweight alloy workpiece size measuring device based on optical measurement, which solves the problem that surface impurities on the workpiece affect the measurement accuracy when measuring lightweight alloy workpieces using existing optical measuring devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A lightweight alloy workpiece size measuring device based on optical measurement includes a support mechanism, the support mechanism including a support column and a support disk fixed on the support column, the support disk being provided with an adsorption disk for placing the alloy workpiece; A light-shielding mechanism includes a light-shielding cylinder and a connecting frame, the connecting frame being rotatably connected to the light-shielding cylinder and movably sleeved on the support column. The light-shielding mechanism also includes a measuring cylinder, the measuring cylinder being fixedly connected to the connecting frame, and a second driving component for driving the measuring cylinder to rotate. A measuring mechanism is provided at the top of the measuring cylinder. The measuring mechanism includes a connecting cylinder, on both sides of which a nozzle and an optical measuring instrument are respectively provided. The nozzle is connected to a corrugated pipe for connecting to an external pipeline.

[0005] Preferably, the support plate is a conical structure with a low center and high edges, and the support column is provided with a guide hole for discharging cleaning wastewater.

[0006] Preferably, the support plate is provided with a rubber filling ring on its outer periphery, the filling ring is located between the support plate and the light-shielding tube, and the inner wall of the filling ring is inclined.

[0007] Preferably, the adsorption disk is composed of a mesh structure formed by crisscrossing reinforcing rods, and an electromagnetic column is provided inside the reinforcing rods of the adsorption disk.

[0008] Preferably, the measuring mechanism further includes a movable rod, which is slidably connected to the top of the measuring cylinder. One end of the movable rod is fixedly connected to the outer wall of the measuring cylinder via a third driving member. A connecting sleeve is provided at the end of the movable rod near the center of the adsorption plate. A connecting rod is rotatably connected inside the connecting sleeve. A fourth driving member for driving the connecting rod to rotate is provided at the top of the connecting sleeve. The connecting cylinder is rotatably connected to the bottom of the connecting sleeve. An installation rod is fixedly provided at the bottom end of the connecting rod. A cleaning brush is provided on the lower end face of the installation rod.

[0009] Preferably, the connecting rod includes a fixed sleeve and a slide rod slidably inserted into the fixed sleeve. An electromagnetic drive is provided between the fixed sleeve and the slide rod to drive their relative movement. The bottom end of the connecting cylinder is provided with a receiving groove for accommodating the mounting rod.

[0010] Preferably, the top of the mounting rod is provided with a limiting toothed ring, and the top of the receiving groove is provided with a limiting toothed groove that matches the limiting toothed ring.

[0011] Preferably, the light-shielding mechanism further includes a fixing plate, which is slidably sleeved on the support column. The second driving component is a first motor fixed to the fixing plate. The output shaft of the first motor is provided with a first gear, and the connecting frame is provided with a second gear that meshes with the first gear.

[0012] Preferably, an annular dust-collecting mesh is fixedly connected to the inner wall of the light-shielding cylinder.

[0013] Preferably, black light-absorbing velvet is embedded in the light-shielding tube.

[0014] The present invention has at least the following beneficial effects: This invention significantly improves the accuracy and efficiency of dimensional measurement of alloy workpieces through the coordinated operation of an optical measuring instrument and an automatic cleaning system. Specifically, it is reflected in: 1. The combination design of the light-absorbing cloth and the ring-shaped dust-collecting net embedded in the light-shielding tube can not only isolate external light interference, but also absorb the dust generated during the cleaning process in real time, solving the measurement error problem caused by secondary dust adhesion in traditional measurement.

[0015] 2. The electromagnetically driven telescopic connecting rod structure, combined with the limiting toothed ring mechanism, enables the cleaning brush to be quickly retracted and extended, making the switching between measurement and cleaning modes more efficient and reliable.

[0016] 3. The design of the rotating brush unfolding under centrifugal force increases the contact area with the workpiece surface, and combined with the immediate adsorption effect of the dust collection net, the cleaning efficiency is improved.

[0017] 4. The coordinated cleaning mechanism of the nozzle and the dust collection screen enables the device to achieve closed-loop cleaning, reducing the frequency of manual maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 A schematic diagram of the connection structure between the support mechanism and the light-shielding mechanism; Figure 4 This is a structural diagram of the connecting frame and the measuring cylinder; Figure 5 A schematic diagram of the structure of the support plate, the suction plate, and the support column; Figure 6 This is a schematic diagram of the adsorption disk structure; Figure 7 This is a schematic diagram of the measuring mechanism. Figure 8 This is a schematic diagram of the internal structure of the connecting cylinder; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point A in the middle; Figure 10 This is a schematic diagram of the connection structure between the electromagnetic drive component and the connecting rod.

[0020] In the diagram: 1. Support mechanism; 11. Base; 12. Support column; 121. Guide hole; 13. Support plate; 14. Adsorption plate; 141. Square hole; 15. Filler ring; 2. Light-shielding mechanism; 22. Fixing plate; 23. Second driving component; 24. First gear; 25. Connecting frame; 26. Second gear; 27. Light-shielding tube; 28. Measuring tube; 3. Measuring mechanism; 31. Moving rod; 32. Third driving component; 33. Connecting sleeve; 34. Fourth driving component; 35. Corrugated pipe; 351. Nozzle; 36. Connecting tube; 361. Restricting tooth groove; 37. Mounting rod; 371. Cleaning brush; 372. Restricting tooth ring; 38. Connecting rod; 381. Slide rod; 382. Restricting block; 383. First electromagnet; 384. Second electromagnet; 385. Fixing sleeve; 4. Optical measuring instrument; 5. Annular dust collection net. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] Reference Figure 1-10 A lightweight alloy workpiece size measuring device based on optical measurement includes a support mechanism 1. The support mechanism 1 includes a support column 12 and a support disk 13 fixed on the support column 12. The support disk 13 is provided with an adsorption disk 14 for placing the alloy workpiece. The light-shielding mechanism 2 includes a light-shielding cylinder 27 and a connecting frame 25. The connecting frame 25 is rotatably connected to the light-shielding cylinder 27 and is movably sleeved on the support column 12. The light-shielding mechanism 2 also includes a measuring cylinder 28, which is fixedly connected to the connecting frame 25. The light-shielding mechanism 2 also includes a second driving member 23 for driving the measuring cylinder 28 to rotate. Measuring mechanism 3 is located on the top of measuring cylinder 28. Measuring mechanism 3 includes connecting cylinder 36. On both sides of connecting cylinder 36, there are nozzles 351 and optical measuring instruments 4 respectively. The nozzles 351 are connected to the bellows 35. The optical measuring instrument 4 adopts the principle of reflective laser triangulation. The laser emitting end and the receiving end are integrated into one unit. The distance and size data are calculated by irradiating the reflected light on the surface of the workpiece. No additional receiving module is required.

[0024] The support column 12 provides vertical support for the entire device. The support plate 13 is horizontally fixed to the top of the support column 12. The adsorption plate 14 is laid on the surface of the support plate 13. Its main function is to support the ferromagnetic alloy workpiece and to achieve workpiece positioning through the adsorption force of the subsequent electromagnetic column. The light-shielding cylinder 27 of the light-shielding mechanism 2 is made of smooth plastic material and has black light-absorbing velvet embedded inside. The velvet not only blocks light to avoid interference from external light on the optical measurement, but also creates a light-absorbing effect. The smooth plastic surface allows the liquid to slide down the inner wall. The connecting cylinder 36 of the measuring mechanism 3 provides a mounting base for the symmetrically arranged nozzles 351 and the optical measuring instrument 4. The optical measuring instrument 4 uses optical microscopic laser measurement technology to accurately collect workpiece size data. The nozzles 351 are connected to external pipelines through the corrugated pipe 35 and can spray cleaning water.

[0025] Furthermore, the support plate 13 has a conical structure that is low in the middle and high around the edges, and the support column 12 has a guide hole 121 inside for discharging cleaning wastewater. The conical structure of the support plate 13 utilizes gravity guidance to cause the clean water to converge towards the center during the spraying process. The guide hole 121 inside the support column 12 is connected to the central area of ​​the support plate 13. The collected liquid flows through the guide hole 121 and is eventually discharged from the side wall, forming a complete liquid discharge path and preventing liquid accumulation from affecting the measurement environment. Furthermore, a rubber filling ring 15 is provided on the outer periphery of the support plate 13. The filling ring 15 is located between the support plate 13 and the light-shielding tube 27, and the inner wall of the filling ring 15 is inclined. The elastic properties of the rubber filler ring 15 allow it to fit tightly against the gap between the outer periphery of the support plate 13 and the inner wall of the light shield 27, effectively preventing liquid splashing. Its inclined inner wall, in conjunction with the smooth surface of the light shield 27, guides liquid sliding down the inner wall of the light shield 27 to the support plate 13, further enhancing the anti-splash effect and preventing liquid residue in the gap. Furthermore, the adsorption plate 14 is a mesh structure composed of crisscrossing reinforcing rods, and electromagnetic columns are provided inside the reinforcing rods of the adsorption plate 14. The adsorption plate 14 is a mesh structure composed of crisscrossing reinforcing rods, and the square holes 141 formed therein allow liquid to flow through. When the adsorption plate 14 is energized, it generates a magnetic field to adsorb ferromagnetic alloy workpieces, ensuring that the workpieces remain stable during measurement and cleaning.

[0026] A ring-shaped dust collection net 5 is fixedly connected to the inner wall of the light-shielding tube 27.

[0027] When the cleaning brush 371 is working, the annular dust collection net 5 is energized, which can adsorb and clean the fallen dust, preventing the dust from floating again. After cleaning, the annular dust collection net 5 is de-energized, and the dust on the annular dust collection net 5 is no longer adsorbed. Then, the annular dust collection net 5 is rinsed with clean water, and the dust is discharged into the support plate 13 through the square hole 141 of the reinforcing rod with the water flow, and discharged through the guide hole 121. The adsorption plate 14 and the annular dust collection net 5 are independently controlled by circuit. When the adsorption plate 14 is energized, it only adsorbs ferromagnetic workpieces, and when the annular dust collection net 5 is energized, it only adsorbs dust. Furthermore, the measuring mechanism 3 also includes a moving rod 31, which is slidably connected to the top of the measuring cylinder 28. One end of the moving rod 31 is fixedly connected to the outer wall of the measuring cylinder 28 through a third driving member 32. A connecting sleeve 33 is provided at the end of the moving rod 31 near the center of the adsorption plate 14. A connecting rod 38 is rotatably connected inside the connecting sleeve 33. A fourth driving member 34 for driving the connecting rod 38 to rotate is provided at the top of the connecting sleeve 33. A connecting cylinder 36 is rotatably connected to the bottom of the connecting sleeve 33. An installation rod 37 is fixedly provided at the bottom end of the connecting rod 38. A cleaning brush 371 is provided on the lower end face of the installation rod 37.

[0028] The movable rod 31 slides horizontally along the top of the measuring cylinder 28, which can move the connecting sleeve 33 and its accessories closer to or further away from the workpiece, adapting to the measurement and cleaning needs of workpieces of different sizes. The connecting sleeve 33 provides rotational support for the connecting rod 38. The fourth driving component 34 is a motor that drives the connecting rod 38 to rotate, which in turn drives the mounting rod 37 and the cleaning brushes 371 to rotate. The cleaning brushes 371 unfold during rotation, allowing them to fully contact the workpiece, clean the workpiece surface, remove dust, and improve measurement accuracy. Furthermore, the connecting rod 38 includes a fixed sleeve 385 and a slide rod 381 slidably inserted into the fixed sleeve 385. An electromagnetic drive is provided between the fixed sleeve 385 and the slide rod 381 to drive the relative movement of the two. The bottom end of the connecting cylinder 36 is provided with a receiving groove for accommodating the mounting rod 37. The connecting rod 38 adopts a nested structure, with the fixed sleeve 385 rotatably connected to the connecting sleeve 33, and the sliding rod 381 sliding axially along the fixed sleeve 385. The electromagnetic drive consists of a first electromagnet 383 fixed to the top of the sliding rod 381 and a second electromagnet 384 inside the top of the fixed sleeve 385. When energized, the two attract each other, causing the sliding rod 381 to move upward, so that the mounting rod 37 and the cleaning brush 371 are housed in the receiving groove of the connecting sleeve 36 to avoid interference with measurement. After de-energization, the sliding rod 381 moves downward under the action of gravity, and the cleaning brush 371 extends to perform cleaning operations. A limiting block 382 is fixed on the surface of the sliding rod 381, and a limiting groove is provided on the inner wall of the fixed sleeve 385 to allow the limiting block 382 to move. The limiting block 382 and the limiting groove can prevent the entire sliding rod 381 from detaching from the fixed sleeve 385. Furthermore, the top of the mounting rod 37 is provided with a limiting toothed ring 372, and the top of the receiving groove is provided with a limiting toothed groove 361 that is adapted to the limiting toothed ring 372. A rotational damping mechanism is provided between the connecting cylinder 36 and the connecting sleeve 33, so that the connecting cylinder 36 and the connecting sleeve 33 remain stationary when there is no external force driving them. When it is necessary to adjust the orientation of the nozzle 351 or the optical measuring instrument 4 (the angle needs to be corrected in a timely manner), the electromagnetic drive is energized to make the limiting tooth ring 372 engage with the limiting tooth groove 361. The fourth drive 34 drives the connecting cylinder 36 to rotate synchronously through the connecting rod 38 to achieve angle adjustment and correction. During cleaning, the limiting tooth ring 372 separates from the limiting tooth groove 361, and the connecting rod 38 rotates rapidly to make the cleaning brush 371 open under the action of centrifugal force, thereby improving cleaning efficiency.

[0029] Furthermore, the shading mechanism 2 also includes a fixing plate 22, which is sleeved on the support column 12. The second driving component 23 is a first motor fixed to the fixing plate 22. The output shaft of the first motor is provided with a first gear 24, and the connecting frame 25 is provided with a second gear 26 that meshes with the first gear 24. The fixing plate 22 is sleeved on the support column 12 and can slide along it. The first motor drives the measuring cylinder 28 to rotate around the support column 12 through the meshing of the first gear 24 and the second gear 26 on the connecting frame 25, so as to realize the 360° circumferential measurement of the workpiece by the measuring mechanism 3. The center position of the connecting frame 25 is set as a ring structure, and the ring structure is used to realize the rotational connection with the fixing plate 22. The second gear 26 is fixed to the surface of the ring structure.

[0030] Furthermore, a base 11 is provided at the bottom of the support column 12.

[0031] Furthermore, the measuring mechanism 3 also includes a third drive element 32 for driving the moving rod 31 to move horizontally. The third driving component 32 is specifically an electric push rod, which is fixed to the side wall of the measuring cylinder 28. Its telescopic end is connected to the moving rod 31. By driving the moving rod 31 to move horizontally, the horizontal distance between the connecting cylinder 36 and the workpiece is adjusted to meet the measurement and cleaning needs of workpieces of different sizes and improve the versatility of the device.

[0032] In summary, the ferromagnetic alloy workpiece to be measured is placed on the surface of the adsorption plate 14 of the support mechanism 1. At this time, the adsorption plate 14 is energized, and the workpiece is firmly fixed on the adsorption plate 14 by electromagnetic force, ensuring that the workpiece does not shift during subsequent cleaning and measurement.

[0033] To eliminate the influence of dust and impurities on the workpiece surface on optical measurements, the workpiece is first cleaned: The third drive component 32 of the measuring mechanism 3 drives the moving rod 31 to slide horizontally along the top of the light-shielding cylinder 27, moving the connecting sleeve 33 and the associated connecting cylinder 36 and cleaning brush 371 to a suitable position above the workpiece to accommodate the workpiece size. Subsequently, the electromagnetic drive component of the connecting rod 38 is de-energized, and the sliding rod 381 moves downward along the fixed sleeve 385 under the action of gravity, and the mounting rod 37 and the cleaning brush 371 extend out from the receiving groove of the connecting cylinder 36. The fourth drive component 34 drives the connecting rod 38 to rotate, causing the mounting rod 37 and the cleaning brush 371 to rotate at high speed. The cleaning brush 371 unfolds under the action of centrifugal force (increasing the contact area with the workpiece), wiping the surface of the workpiece, thereby cleaning the dust on the workpiece surface and improving the accuracy of optical measurement. During the above process, the annular dust collection net 5 is energized and has the effect of adsorbing dust. After the cleaning brush 371 sweeps the dust off the surface of the workpiece, it will be immediately adsorbed and captured by the annular dust collection net 5 (it has the function of immediately capturing dust, effectively preventing dust from continuing to fall onto the workpiece, resulting in the workpiece not being completely cleaned). This prevents some dust from floating in the measuring cylinder 28 after the cleaning work is completed, and then settling and adhering to the surface of the workpiece again, affecting the measurement. At the same time, when the cleaning brush 371 rotates, it causes the air inside the measuring cylinder 28 to rotate, causing the dust on the surface of the workpiece to move outward and diffuse towards the annular dust collection net 5 under the action of centrifugal force, which promotes the movement speed of dust towards the annular dust collection net 5 and improves the dust capture efficiency of the annular dust collection net 5. After the workpiece is cleaned, the cleaning brush is retracted: the electromagnetic drive is energized, the slide rod 381 moves upward, and the mounting rod 37 and cleaning cotton 371 are stored back in the receiving slot of the connecting cylinder 36 to avoid interference with measurement and being wetted by cleaning water. Then, the optical measuring instrument 4 is started, and omnidirectional measurement is achieved through multi-dimensional adjustments. Horizontal distance adjustment: the third drive 32 drives the moving rod 31 to adjust the horizontal distance between the connecting cylinder 36 and the workpiece to adapt to workpieces of different sizes. Angle adjustment: if the orientation of the optical measuring instrument 4 needs to be adjusted, the electromagnetic drive is energized to make the limiting toothed ring 372 of the mounting rod 37 engage with the limiting toothed groove 361 of the connecting cylinder 36. The fourth drive 34 drives the connecting rod 38 to drive the connecting cylinder 36 to rotate synchronously. After angle calibration, the toothed ring separates from the toothed groove. Circumferential adjustment: the second drive 23 of the light-shielding mechanism 2 drives the connecting frame 25 to rotate the measuring cylinder 28 around the support column 12 through the meshing of the first gear 24 and the second gear 26, thereby making the optical measuring instrument 4 rotate around the workpiece to achieve 360° circumferential measurement. During the 360° surround measurement, the nozzle 351 is turned on, spraying cleaning water onto the annular dust collection net 5. At the same time, the nozzle 351 will follow the connecting tube 36 to rotate inside the annular dust collection net 5, forming a 360° rotating wash of the annular dust collection net 5 (at this time, the annular dust collection net 5 is de-energized, and the dust on the annular dust collection net 5 is not subject to adsorption force. Under the wash of the nozzle 351, the dust is discharged from the guide hole 121 after passing through the square hole 141 with the cleaning water), thus completing the cleaning of the annular dust collection net 5.

[0034] After the measurement is completed, the power to the adsorption plate 14 is turned off, releasing the adsorption and fixation on the workpiece, and the workpiece is removed.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. 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 principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A lightweight alloy workpiece dimension measuring device based on optical measurement, characterized in that, include: The support mechanism (1) includes a support column (12) and a support plate (13) fixed on the support column (12). The support plate (13) is provided with an adsorption plate (14) for placing alloy workpieces. The light-shielding mechanism (2) includes a light-shielding cylinder (27) and a connecting frame (25). The connecting frame (25) is rotatably connected to the light-shielding cylinder (27) and is movably sleeved on the support column (12). The light-shielding mechanism (2) also includes a measuring cylinder (28). The measuring cylinder (28) is fixedly connected to the connecting frame (25), and the light-shielding cylinder (27) and the measuring cylinder (28) are rotatably connected. The light-shielding mechanism (2) also includes a second driving member (23) for driving the measuring cylinder (28) to rotate. Measuring mechanism (3) is located on the top of measuring cylinder (28). Measuring mechanism (3) includes connecting cylinder (36). On both sides of connecting cylinder (36) are nozzles (351) and optical measuring instruments (4). The nozzles (351) are connected to a bellows (35).

2. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 1, characterized in that, The support plate (13) is a conical structure with a low center and high sides, and the support column (12) is provided with a guide hole (121) for discharging cleaning wastewater.

3. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 2, characterized in that, The support plate (13) is provided with a rubber filling ring (15) on its outer periphery. The filling ring (15) is located between the support plate (13) and the light shielding tube (27), and the inner wall of the filling ring (15) is inclined.

4. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 3, characterized in that, The light-shielding tube (27) is inlaid with black light-absorbing velvet.

5. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 1, characterized in that, The measuring mechanism (3) further includes a moving rod (31), which is slidably connected to the top of the measuring cylinder (28). One end of the moving rod (31) is fixedly connected to the outer wall of the measuring cylinder (28) through a third driving member (32). A connecting sleeve (33) is provided at one end of the moving rod (31) near the center of the adsorption plate (14). A connecting rod (38) is rotatably connected inside the connecting sleeve (33). A fourth driving member (34) for driving the connecting rod (38) to rotate is provided at the top of the connecting sleeve (33). The connecting cylinder (36) is rotatably connected to the bottom of the connecting sleeve (33). An installation rod (37) is fixedly provided at the bottom end of the connecting rod (38). A cleaning brush (371) is provided on the lower end face of the installation rod (37).

6. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 5, characterized in that, The connecting rod (38) includes a fixed sleeve (385) and a sliding rod (381) slidably inserted into the fixed sleeve (385). An electromagnetic drive is provided between the fixed sleeve (385) and the sliding rod (381) for driving the relative movement of the two. The bottom end of the connecting cylinder (36) is provided with a receiving groove for accommodating the mounting rod (37).

7. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 6, characterized in that, The top of the mounting rod (37) is provided with a limiting toothed ring (372), and the top of the receiving groove is provided with a limiting toothed groove (361) that is adapted to the limiting toothed ring (372).

8. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 1, characterized in that, The light-shielding mechanism (2) also includes a fixing plate (22), which is slidably sleeved on the support column (12). The second driving member (23) is a first motor fixed to the fixing plate (22). The output shaft of the first motor is provided with a first gear (24), and the connecting frame (25) is provided with a second gear (26) that meshes with the first gear (24).

9. The lightweight alloy workpiece dimension measuring device based on optical measurement according to claim 1, characterized in that, The inner wall of the light-shielding tube (27) is fixedly connected with an annular dust-collecting net (5).

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