A kind of puffed machine screw main shaft measuring device

Abstract

This invention relates to the field of rod and shaft measurement technology, specifically to a measuring device for the screw spindle of an extruder, comprising a sliding seat, a mounting seat, a support assembly, a shaft shifting unit, an adjustment unit, and a locking assembly. In this invention, the axial position of the spindle is first adjusted in the adjustment station, ensuring that the thread section, straightness, and surface defects of the spindle are all within the measurement area of ​​the visual inspection group one. This is combined with the spindle rotation driven in the measurement station one, allowing for comprehensive measurement of the thread section, straightness, and surface defects. In the measurement station one, not only are corresponding measurement actions performed, but the orientation of the spline groove on the spindle is also coarsely adjusted. Then, in the measurement station two, the orientation of the spline groove is finely adjusted, enabling precise measurement of various spline groove data. In summary, by ensuring accurate images from a precise viewing angle during each measurement, the accuracy of the measurement is improved, making it more suitable for batch measurement operations of the spindle.

Description

Technical Field

[0001] This invention relates to the field of rod shaft measurement technology, specifically to a measuring device for the screw spindle of an extruder. Background Technology

[0002] The screw spindle of an extruder is the core power and load-bearing component of the extrusion equipment. It is mainly responsible for driving the screw element to realize the conveying, extrusion, shearing and extrusion of materials. Along the axial direction, it is mainly composed of the shaft head, the support journal (used to install bearings), the keyway section (to install detachable screw elements through the spline groove), and the threaded section.

[0003] In the case of mass production of extruder screw spindles in a factory assembly line, in order to ensure that the production indicators meet the requirements, that is, to ensure that the thread section, straightness of the shaft, surface defects of the shaft, spline groove and other data characteristics of the spindle are at the set values, it is necessary to use visual inspection equipment to measure the spindle, so as to determine whether the spindle meets the production requirements and subsequent use requirements.

[0004] The main steps of current visual inspection equipment for measurement are as follows: First, the existing conveying equipment transports the spindle to be measured to the shooting and measurement station in sequence, and the spindle is placed at the station. Then, the existing inspection equipment (such as a CCD camera) takes a picture of the spindle at the station, and the picture is fed back to the control and analysis system for image analysis to obtain the corresponding measurement data of the spindle. The above operation process is repeated to carry out the assembly line measurement and inspection process.

[0005] The existing measurement process has the following problems: Currently, the spindle is mainly moved to the corresponding workstation using existing conveying equipment, which only ensures the movement requirements of the spindle. Therefore, after the spindle is moved to the workstation, the axial position and groove orientation of the spindle are not restricted. As a result, when the vision inspection equipment performs imaging measurement, it is difficult to fully capture and measure the various features of the thread section and spline groove of the spindle. Furthermore, the uncertain front and rear position of the spindle requires repositioning of the spindle for each image analysis, which affects the overall measurement accuracy. In addition, the current measurement method is often from top to bottom, so the lower part of the spindle and other positions need to be compensated for by supplementing the inspection equipment. In summary, not only does the overall equipment cost increase, but the measurement accuracy is also poor. Summary of the Invention

[0006] Therefore, it is necessary to provide a measuring device for the screw spindle of an extruder, which aims to solve the problems of the prior art mentioned above.

[0007] This application provides a measuring device for the screw spindle of an extruder, which is disposed between two frames. A conveying assembly is disposed on the right side of the frame, including: a sliding seat. The sliding seat is disposed on the upper end surface of the frame. A mounting seat is fixedly disposed on the opposite surface of the two sliding seats. Three support components are disposed on the mounting seat, which are distributed equidistantly from left to right. The three support components correspond to the adjustment station, the first measurement station, and the second measurement station from left to right. The support components include two support rollers. A drive component one for driving the support rollers to rotate is disposed on the mounting seat.

[0008] Both sliding seats are provided with a shifting unit. The shifting unit includes two shifting plates symmetrically distributed front and back. The upper end face of the shifting plate is provided with four V-shaped slots. The shifting unit includes a second drive assembly for intermittently moving the spindle to the right.

[0009] An adjustment unit is provided on both mounting bases. The adjustment unit includes two symmetrical positioning plates and two positioning posts distributed front and back. The positioning plates limit the front and back position of the spindle, and the positioning posts limit the circumferential angle of the spindle.

[0010] The shift plate is equipped with a locking component, which is located on the lower pressure plate of the shift plate. During the transfer of the spindle, the spindle is locked by the pressing action of the lower pressure plate.

[0011] The first measurement station is equipped with a visual inspection group 1 for measuring the appearance features of the spindle thread section, straightness and surface defects, and the orientation of the spindle groove is initially adjusted by the visual inspection group 1. The second measurement station is equipped with a visual inspection group 2 for measuring the groove on the spindle.

[0012] According to an advantageous embodiment, the upper end face of the mounting base is provided with a receiving groove for accommodating the support component, the support roller is rotatably disposed in the receiving groove, the distance between two adjacent support rollers is less than the diameter of the main shaft, the drive component includes a transmission belt, a drive shaft is rotatably disposed on the mounting base, and the drive shaft is connected to the corresponding support roller through the transmission belt.

[0013] According to an advantageous embodiment, the second drive assembly includes a rotating shaft, and two rotating shafts distributed to the left and right with their axes extending forward and backward are rotatably disposed on the mounting base. A connecting arm that is rotatably connected to the corresponding shifting plate is fixedly sleeved on the rotating shaft.

[0014] According to an advantageous embodiment, the locking assembly further includes a pneumatic rod, a pneumatic rod is fixedly mounted on the shifting plate, a lower pressure plate is fixedly sleeved on the telescopic section of the pneumatic rod, and a fixing frame is fixedly mounted on the upper end face of the shifting plate.

[0015] The telescopic section of the pneumatic rod passes through the fixed frame, and a threaded groove is provided on the circumferential surface of the upper part of the telescopic section of the pneumatic rod. A mating block located in the threaded groove is fixedly installed on the fixed frame.

[0016] According to an advantageous embodiment, the adjustment unit further includes a suspension, with suspensions fixedly mounted on the opposite sides of the two mounting seats. A positioning plate is slidably mounted on the corresponding suspension. The front positioning plate is divided into an inclined section and a vertical section that slope downwards from front to back from top to bottom. A bolt that slides through the suspension is fixedly mounted on the positioning plate.

[0017] According to an advantageous embodiment, the visual inspection group one includes a CCD camera one, and two CCD cameras one distributed left and right are provided on the back of the two mounting bases. The two corresponding CCD cameras are located below the measurement station one and are facing the corresponding support component. A CCD camera two is provided on both frames and is located directly above the measurement station one.

[0018] According to an advantageous embodiment, the adjustment unit further includes a movable seat, which is fixedly mounted on the front mounting seat by a mechanical arm. Two sliding blocks distributed front and back are slidably arranged below the movable seat. A bidirectional threaded rod with its axis extending front and back is rotatably sleeved on the movable seat, and the threads of the bidirectional threaded rod pass through the sliding blocks.

[0019] The positioning stakes are fixedly installed below the sliding block. The two positioning stakes are symmetrical front and back, and the front positioning stake consists of a rectangular segment and an isosceles triangular segment from back to front. The left and right lengths of the rectangular segment of the positioning stake are the same as the width of the spline groove.

[0020] According to an advantageous embodiment, the lower end of the positioning post is provided with an abutment rod that slides up and down, and a return spring is provided between the abutment rod and the positioning post. The diameter of the abutment rod is smaller than the width of the spline groove.

[0021] According to an advantageous embodiment, the second visual inspection group includes a third CCD camera for measuring the groove on the main spindle, with two third CCD cameras arranged front and rear on each mounting base.

[0022] In summary, the present invention has the following beneficial effects: Firstly, the axial position of the spindle is adjusted in the adjustment station, ensuring that the threaded section, straightness, and surface defects of the spindle are all within the measurement area of ​​the visual inspection group one. This, combined with the spindle rotation driven in the measurement station one, allows for comprehensive measurement of the threaded section, straightness, and surface defects of the spindle. In the measurement station one, not only are corresponding measurement actions performed, but the orientation of the slot on the spindle is also coarsely adjusted. Then, in the measurement station two, the orientation of the spindle slot is finely adjusted, thereby enabling accurate measurement of various data related to the spline groove. In summary, by ensuring accurate images from a precise perspective during each measurement, the accuracy of the measurement is improved, making it more suitable for batch measurement operations of the spindle. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of a measuring device for the screw spindle of an extruder, according to an embodiment of the present invention, is shown.

[0025] Figure 2 A top view schematic diagram of a partial structure of an extruder screw spindle measuring device provided according to an embodiment of the present invention is shown.

[0026] Figure 3 A three-dimensional structural diagram of the sliding seat, mounting seat, and shifting plate provided according to an embodiment of the present invention is shown.

[0027] Figure 4 An exploded perspective view of the structure between the shift plate, connecting arm and lower pressure plate provided according to an embodiment of the present invention is shown.

[0028] Figure 5 A partial cross-sectional front view of the pressure plate, pneumatic rod, and mating block provided according to an embodiment of the present invention is shown.

[0029] Figure 6 A partial cross-sectional perspective view of the support roller, positioning plate, and conveyor belt provided according to an embodiment of the present invention is shown.

[0030] Figure 7 A partial cross-sectional perspective view of the three-dimensional structure between the movable seat, the positioning pile, and the bidirectional threaded rod provided according to an embodiment of the present invention is shown.

[0031] Figure 8 A partial cross-sectional side view of the positioning post, return spring, and abutment rod provided according to an embodiment of the present invention is shown.

[0032] Figure 9 A schematic diagram illustrating the state change of the shift plate moving the main shaft to the right, according to an embodiment of the present invention, is shown.

[0033] The above-mentioned attached drawings include the following reference numerals: 1. Frame; 10. Conveying assembly; 11. Sliding seat; 12. Mounting seat; 2. Supporting assembly; 20. Adjustment station; 21. Measurement station one; 22. Measurement station two; 23. Support roller; 24. Receiving groove; 30. Transmission belt; 31. Drive shaft; 4. Shaft shifting unit; 40. Shaft shifting plate; 41. Slot; 420. Rotating shaft; 421. Connecting arm; 5. Adjusting unit; 50. Positioning plate; 51. Positioning stake; 52. Suspension; 53. Bolt one; 54. Moving seat; 55. Bidirectional threaded rod; 56. Abutment rod; 57. Return spring; 6. Locking assembly; 60. Lower pressure plate; 61. Pneumatic rod; 62. Threaded groove; 63. Mating block; 70. CCD camera one; 71. CCD camera two; 80. CCD camera three. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, a screw spindle measuring device for an extruder is disposed between two frames 1 distributed front to back. A conveying assembly 10 is disposed on the right side of the frame 1, including a sliding seat 11. The upper end face of the frame 1 is provided with the sliding seat 11. The opposite faces of the two sliding seats 11 are fixedly provided with mounting seats 12. The right end face of the mounting seat 12 is an inclined surface from right to left upward. Three support components 2 are disposed on the mounting seat 12, which are distributed equidistantly from left to right. The three support components 2 correspond to the adjustment station 20, the first measurement station 21 and the second measurement station 22 from left to right. The support component 2 includes two support rollers 23 distributed left to right and whose axes extend front to back. A drive component 1 for driving the support rollers 23 to rotate is disposed on the mounting seat 12.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, a shifting axis unit 4 is provided on both sliding seats 11. The shifting axis unit 4 includes two shifting axis plates 40 symmetrically distributed front and back. Four V-shaped slots 41 are opened on the upper end surface of the shifting axis plates 40. The shifting axis unit 4 includes a second drive assembly for driving the shifting axis plates 40 to intermittently move the spindle to the right.

[0037] like Figure 1 , Figure 3 and Figure 7As shown, both mounting bases 12 are provided with adjustment units 5 located in adjustment station 20 and measurement station 22. The adjustment unit 5 includes two symmetrical positioning plates 50 and two positioning posts 51 distributed front and back. The positioning plates 50 limit the front and back position of the spindle, and the positioning posts 51 limit the circumferential angle of the spindle.

[0038] like Figure 1 and Figure 3 As shown, a locking component 6 is provided on the shift plate 40. The locking component 6 is located on the pressure plate 60 on the shift plate 40. During the transfer of the spindle, the spindle is locked by pressing the spindle down into the corresponding slot 41 through the pressure plate 60.

[0039] like Figure 1 As shown, the first measurement station 21 is equipped with a visual inspection group 1 for measuring the appearance features such as the thread section, straightness and surface defects of the spindle, and the orientation of the groove on the spindle is initially adjusted by the visual inspection group 1. The second measurement station 22 is equipped with a visual inspection group 2 for measuring the groove on the spindle.

[0040] During operation, the spindle to be tested is gripped by the robotic arm and intermittently lowered to the adjustment station 20. Two support rollers 23 in the corresponding support assembly 2 hold the spindle in place. As the spindle is lowered from top to bottom, the front and rear positioning plates 50 in the adjustment unit 5 limit its position. Then, during the intermittent movement of the shift plate 40, the shift plate 40 rotates, causing the spindle to engage in the corresponding slot 41. This allows the shift plate 40 to move the spindle from the adjustment station 20 to the first measurement station 21, from the first measurement station 21 to the second measurement station 22, and from the second measurement station 22 to the conveying assembly 10 (see...). Figure 9 When the spindle in the adjustment station 20 is adjusted and transferred to the measurement station 21, the spindle is aligned with the vision inspection group 1. At this point, the thread section, straightness, and surface defects of the spindle are all in the test area of ​​the vision inspection group 1. Subsequently, the spindle in the measurement station 21 is rotated by the drive component 1. At the same time, the vision inspection group 1 measures the thread section, straightness, and surface defects of the spindle by taking pictures. In addition, after the above measurement is completed, the support roller 23 in the measurement station 21 slowly rotates and the vision inspection group 1 finds the approximate notch position of the spline groove by taking pictures, and makes it initially face upward.

[0041] When the spindle in measurement station 1 21 is moved to measurement station 22, the position of the spline groove on the spindle has been initially adjusted to face upwards. Subsequently, the two positioning stakes 51 in the adjustment unit 5 use a mechanical positioning method to contact the spline groove body to accurately position the spline groove, so that the spline groove faces upwards. The spline groove and the groove body at the rear end are photographed and measured by the vision inspection group 2. In summary, the photographed photos are transmitted to the analysis system, and finally the various measurement data of the spindle are obtained. The above process is repeated to perform batch measurement operations on the spindle.

[0042] Secondly, as the spindle moves from the adjustment station 20 to the measurement station 1 21 and from the measurement station 1 21 to the measurement station 22, the shift plate 40 lifts the spindle, and the lower pressure plate 60 in the locking unit presses down on the spindle to lock its position, thereby ensuring that the spindle position does not change during the transfer to the measurement.

[0043] like Figure 1 and Figure 6 As shown, the upper end face of the mounting base 12 is provided with a receiving groove 24 for accommodating the support component 2. The support roller 23 is rotatably disposed in the receiving groove 24. The distance between two adjacent support rollers 23 is less than the diameter of the main shaft. The drive component includes a transmission belt 30. The mounting base 12 is rotatably disposed with a drive shaft 31 corresponding to the support roller 23 in the measuring station 21. The drive shaft 31 and the corresponding support roller 23 are connected and driven by the transmission belt 30. The drive shaft 31 is connected to an external motor (not shown in the figure).

[0044] like Figure 1 and Figure 4 As shown, the second drive assembly includes a rotating shaft 420. Two rotating shafts 420, which are distributed to the left and right and whose axes extend forward and backward, are rotatably arranged on the mounting base 12. A connecting arm 421, which is rotatably connected to the corresponding shift plate 40, is fixedly sleeved on the rotating shaft 420. The rotating shaft 420 is connected to the second external motor (not shown in the figure).

[0045] When measurement is required at measurement station 21, the external motor drives the corresponding drive shaft 31 to rotate synchronously. The drive shaft 31 drives the corresponding support roller 23 to rotate synchronously through the transmission belt 30. The friction between the support roller 23 and the main shaft causes the main shaft to rotate synchronously. Thus, the main shaft can rotate in measurement station 21, thereby enabling all-round imaging and measurement of the thread section and circumferential surface of the main shaft.

[0046] See Figure 9When the spindle needs to be moved, the external motor drives the rotating shaft 420 to rotate synchronously. The rotating shaft 420 drives the corresponding connecting arm 421 to rotate clockwise synchronously. The connecting arm 421 drives the shift plate 40 to rotate clockwise. During the process of the connection point between the connecting arm 421 and the shift plate 40 moving from the lowest point to the highest point, the position of the slot 41 changes. The slot 41 on the shift plate 40 moves from the lower left to the upper right of the adjacent right-side receiving slot 24. During this process, the inner wall of the slot 41 supports the spindle, thereby allowing the spindle to disengage. As the connecting point of the connecting arm 421 and the shift plate 40 moves from the highest point to the lowest point, the slot 41 on the shift plate 40 moves from the upper left to the lower right of the adjacent right-side receiving slot 24. During this process, the spindle is placed in the receiving slot 24 adjacent to the right side of the previous position, thus completing a single transfer operation of the spindle (the spindle moves from the adjustment station 20 to the measurement station 1 21, the spindle moves from the measurement station 1 21 to the measurement station 22, and the spindle moves into the conveying assembly 10 in the measurement station 22).

[0047] like Figure 1 , Figure 4 and Figure 5 As shown, the locking assembly 6 also includes a pneumatic rod 61, which is fixedly mounted on the shift plate 40. The lower pressure plate 60 is fixedly sleeved on the telescopic section of the pneumatic rod 61, and a fixing frame is fixedly mounted on the upper end face of the shift plate 40.

[0048] The telescopic section of the pneumatic rod 61 passes through the fixed frame. A threaded groove 62 is provided on the circumferential surface of the upper part of the telescopic section of the pneumatic rod 61. A mating block 63 located in the threaded groove 62 is fixedly installed on the fixed frame.

[0049] It is necessary to provide supplementary explanation regarding the distance between the pneumatic rod 61, the fixing bracket, the mating block 63, and the adjacent placement spindle. At this set distance, after the shift plate 40 lowers the conveyed spindle, the shift plate 40 moves downward relative to the spindle. During this process, the telescopic section of the pneumatic rod 61, the mating block 63, and the fixing bracket will not collide or jam with the spindle. This set distance was obtained through multiple tests by those skilled in the art and is an existing external technical feature, which will not be elaborated further here.

[0050] During the process of the connection point between the connecting arm 421 and the shift plate 40 moving from the lowest point to the highest point, initially (when the slot 41 is not in contact with the spindle), the lower pressure plate 60 is located on the left side of the spindle to be transferred. As the connecting arm 421 continues to move, the slot 41 gradually moves below the spindle, while the lower pressure plate 60 gradually moves above the spindle to be transferred. Under the operation of the external air pump, the pneumatic rod 61 causes its telescopic section to drive the lower pressure plate 60 to move down synchronously. Through the cooperation between the threaded groove 62 and the mating block 63, the lower pressure plate 60 deflects while moving down. When the slot 41 contacts the spindle, the lower pressure plate 60 deflects to directly above the spindle and presses down on the spindle, thereby completing the state locking action of the spindle. In addition, the contact surface between the lower pressure plate 60 and the spindle is made of rubber to avoid damage to the surface of the spindle during the pressing action.

[0051] In summary, the mechanical locking of the lower pressure plate 60 during the spindle transfer process prevents the spindle from deflecting or shifting, thus avoiding any impact on the accuracy of subsequent measurement processes.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, the adjustment unit 5 also includes a suspension 52. The suspension 52 is fixedly installed on the opposite sides of the two mounting seats 12. The positioning plate 50 is slidably installed on the corresponding suspension 52. Taking the front positioning plate 50 as an example, the front positioning plate 50 is divided into an inclined section and a vertical section that slope downwards from front to back from top to bottom. The positioning plate 50 is fixedly installed with a bolt 53 that slides through the suspension 52 from front to back. The front and rear positions of the positioning plate 50 are locked by tightening the nut on the bolt 53.

[0053] The sliding seat 11 is slidably mounted on the frame 1. The frame 1 is provided with a threaded rod extending forward and backward along its axis. The forward and backward position of the sliding seat 11 can be adjusted by manually rotating the handwheel on the threaded rod and through the threaded engagement between the threaded rod and the corresponding sliding seat 11.

[0054] Before conducting the measurement, based on the front and rear length dimensions of the spindle and the distribution positions of the threaded section and groove on the spindle, the threaded rod is first manually rotated synchronously by turning the handwheel. This adjusts the distance between the two sliding seats 11 so that the distance between the two sliding seats 11 meets the approximate placement length of the spindle. Then, the front and rear positioning plates 50 are manually adjusted and the front and rear positions of the positioning plates 50 are locked by tightening the nuts on the bolts 53. This ensures that the distance between the vertical sections of the two positioning plates 50 is the same as the length of the spindle to be measured, and that the threaded section avoids the support roller 23. This ensures rotational stability during the subsequent rotation measurement process and facilitates clear visual imaging measurement of the spindle threaded section, improving the accuracy of the visual imaging measurement.

[0055] like Figure 1 and Figure 2As shown, the visual inspection group includes a CCD camera 70. Two CCD cameras 70 are arranged on the back of the two mounting bases 12, and the two CCD cameras are located below the measurement station 21 and face the corresponding support component 2. A CCD camera 71 is arranged on both frames 1, located directly above the measurement station 21.

[0056] After the spindle is moved to measurement station 21, CCD camera 70 and CCD camera 71 take pictures of corresponding positions on the spindle. Then, the spindle is rotated intermittently by two support rollers 23 in measurement station 21, so that the spindle is exposed to the shooting area of ​​CCD camera 70 and CCD camera 71 in the circumference. The shooting process is repeated by CCD camera 70 and CCD camera 71. Finally, multiple pictures are taken of a single spindle in measurement station 21, and the pictures are then processed. The image is fed back to the control and analysis system for image analysis, thereby measuring the thread section, straightness, radiality, and surface defects of the spindle. In addition, after completing the above measurements on a single spindle, the position of the groove on the spindle is measured by CCD camera 271. When the groove faces upward as the spindle rotates, the image fed back to the control and analysis system by CCD camera 271 is identified, and the support roller 23 is controlled to stop rotating. At this time, the spline groove on the spindle is initially facing upward, thus completing all the operation steps of the spindle at measurement station 21.

[0057] like Figure 1 , Figure 7 and Figure 8 As shown, the adjustment unit 5 also includes a movable seat 54. The movable seat 54 is fixedly mounted on the front mounting seat 12 by a mechanical arm. Two sliding blocks distributed front and back are slidably arranged below the movable seat 54. A bidirectional threaded rod 55 with its axis extending front and back is rotatably sleeved on the movable seat 54. The bidirectional threaded rod 55 is threaded through the sliding blocks and is connected to the motor.

[0058] The positioning stake 51 is fixedly installed below the sliding block. The two positioning stakes 51 are symmetrical front and back, and the front positioning stake 51 consists of a rectangular segment and an isosceles triangular segment from back to front. The left and right lengths of the rectangular segment of the positioning stake 51 are the same as the width of the spline groove.

[0059] The lower end of the positioning post 51 is provided with an abutment rod 56 that slides up and down. A return spring 57 is provided between the abutment rod 56 and the positioning post 51. The diameter of the abutment rod 56 is smaller than the width of the spline groove. The lower ends of both the abutment rod 56 and the positioning post 51 are chamfered.

[0060] like Figure 1 and Figure 2As shown, the second visual inspection group includes a CCD camera 380 for measuring the groove on the main shaft, and two CCD cameras 380 are arranged in a front-to-back distribution on the mounting base 12.

[0061] When the spindle moves to measurement station 22, the spline grooves and other grooves of the spindle are initially facing upwards. The position information of the spline grooves under precise data is known before operation. The robotic arm moves the moving seat 54 to directly above the spline groove under the set precise data, causing the moving seat 54 to move the contact rod 56 and positioning post 51 into the spline groove. The contact rod 56 first contacts the bottom of the spline groove. As the moving seat 54 continues to move, the return spring 57 is compressed, and the positioning post 51 begins to move into the spline groove. During this process, the chamfered area of ​​the positioning post 51 guides it to slowly move into the spline groove and adjusts the spindle angle circumferentially. When the lower ends of the two positioning posts 51 are in close contact with the bottom of the spline groove, the spindle... The spline groove of the shaft is positioned facing directly upwards. The motor drives the bidirectional threaded rod 55 to rotate synchronously. Through the cooperation between the bidirectional threaded rod 55 and the corresponding sliding block, the two positioning posts 51 are moved away from each other. Finally, the spline groove is opened up in the two positioning posts 51, completing the repositioning of the main shaft in the front and back directions. This reduces the impact on the main shaft position during transportation. After the above positioning is completed, the robotic arm drives the positioning posts 51 on it to reset. The CCD camera 380 works to take visual pictures of the spline groove (or groove body) and feeds the captured images back to the control and analysis system for image analysis. This allows for the analysis and measurement of whether the spline groove has cracks, dent depth, geometric accuracy, wear degree, and fit condition.

[0062] Furthermore, the positioning stake 51 is installed on the sliding block in a detachable manner, which makes it easy to replace positioning stakes 51 of different shapes to adapt to batch measurement processes of different sizes. Secondly, other grooves on the main shaft can be positioned and measured in the same way according to the above operation process.

[0063] It should be further explained that the existing technology for measuring the spindle involves the following process: First, the spindle is sequentially transported to a designated imaging station via a conveyor (conveyor belt or robotic arm), and its appearance is measured using visual measurement (CCD camera). However, during the measurement of the spindle's threaded section and groove, the accuracy of the images generated by visual imaging is easily affected because the spindle's front-to-back position and circumferential angle are not precisely controlled, thus impacting the final measurement data for the spindle. This technical solution adds an adjustment unit 5 and a locking unit. The system includes an adjustment station 20, a measurement station 1 21, and a measurement station 22. The adjustment station 20 pre-adjusts the spindle state required in measurement station 1 21, while measurement station 1 21 pre-adjusts the spindle state required in measurement station 22 and then fine-tunes it. This ensures accurate images from precise angles during each measurement, improving measurement accuracy. Furthermore, the added components are all existing conventional parts, allowing for long-term use after a single installation. In summary, this technical solution is a specific improvement based entirely on and addressing the deficiencies of existing technology.

[0064] In the description of this invention, it should be understood that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom," indicating directions or positional relationships, are generally based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0065] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A measuring device for the screw spindle of an extruder, disposed between two frames, wherein a conveying assembly is disposed on the right side of the frames, characterized in that, include: The upper surface of the frame is provided with a sliding seat, and the opposite surfaces of the two sliding seats are fixedly provided with a mounting seat. The mounting seat is provided with three support components that are equidistantly distributed from left to right. The three support components correspond to the adjustment station, the first measurement station, and the second measurement station from left to right. The support components include two support rollers, and the mounting seat is provided with a drive component one for driving the support rollers to rotate. The two sliding seats are provided with a shifting unit. The shifting unit includes two shifting plates symmetrically distributed front and back. The upper end face of the shifting plate is provided with four V-shaped slots. The shifting unit includes a second drive assembly for intermittently moving the spindle to the right. An adjustment unit is provided on both of the mounting bases. The adjustment unit includes two symmetrical positioning plates and two positioning posts distributed in front and behind. The positioning plates limit the front and rear position of the spindle, and the positioning posts limit the circumferential angle of the spindle. The shifting plate is provided with a locking component, which is located on the lower pressure plate of the shifting plate. During the transfer of the spindle, the spindle is locked by the pressing action of the lower pressure plate. The first measurement station is equipped with a visual inspection group 1 for measuring the appearance features of the spindle thread section, straightness and surface defects, and the orientation of the spindle groove is initially adjusted by the visual inspection group 1. The second measurement station is equipped with a visual inspection group 2 for measuring the groove on the spindle.

2. The extruder screw spindle measuring device according to claim 1, characterized in that: The upper end face of the mounting base is provided with a receiving groove for accommodating the support component. The support roller is rotatably disposed in the receiving groove. The distance between two adjacent support rollers is less than the diameter of the main shaft. The drive component includes a transmission belt. A drive shaft is rotatably disposed on the mounting base. The drive shaft is connected to the corresponding support roller through the transmission belt.

3. The extruder screw spindle measuring device according to claim 1, characterized in that: The second drive assembly includes a rotating shaft. Two rotating shafts are rotatably mounted on the mounting base, which are distributed to the left and right and extend forward and backward. A connecting arm that is rotatably connected to the corresponding shift plate is fixedly sleeved on the rotating shaft.

4. The extruder screw spindle measuring device according to claim 1, characterized in that: The locking assembly also includes a pneumatic rod, a pneumatic rod is fixedly mounted on the shifting plate, a lower pressure plate is fixedly sleeved on the telescopic section of the pneumatic rod, and a fixing frame is fixedly mounted on the upper end face of the shifting plate. The telescopic section of the pneumatic rod passes through the fixed frame, and a threaded groove is provided on the circumferential surface of the upper part of the telescopic section of the pneumatic rod. A mating block located in the threaded groove is fixedly installed on the fixed frame.

5. The extruder screw spindle measuring device according to claim 1, characterized in that: The adjustment unit also includes a suspension. Suspension is fixedly installed on the opposite sides of the two mounting seats. The positioning plate is slidably installed on the corresponding suspension. The front positioning plate is divided into an inclined section and a vertical section that slope downwards from front to back from top to bottom. A bolt that slides through the suspension is fixedly installed on the positioning plate.

6. The extruder screw spindle measuring device according to claim 1, characterized in that: The visual inspection group includes a CCD camera. Two CCD cameras are arranged on the back of the two mounting bases, one on each side. The two CCD cameras are located below the measurement station and face the corresponding support component. A CCD camera is arranged on both frames, one directly above the measurement station.

7. The extruder screw spindle measuring device according to claim 1, characterized in that: The adjustment unit also includes a movable seat. The movable seat is fixedly mounted on the front mounting seat by a mechanical arm. Two sliding blocks distributed in front and behind are slidably arranged below the movable seat. A bidirectional threaded rod with its axis extending in front and behind is rotatably sleeved on the movable seat. The threads of the bidirectional threaded rod pass through the sliding blocks. The positioning stakes are fixedly installed below the sliding block. The two positioning stakes are symmetrical front and back, and the front positioning stake consists of a rectangular segment and an isosceles triangular segment from back to front. The left and right lengths of the rectangular segment of the positioning stake are the same as the width of the spline groove.

8. The extruder screw spindle measuring device according to claim 7, characterized in that: The lower end of the positioning post is provided with an abutment rod that slides up and down. A return spring is provided between the abutment rod and the positioning post. The diameter of the abutment rod is smaller than the width of the spline groove.

9. The extruder screw spindle measuring device according to claim 1, characterized in that: The second visual inspection group includes a CCD camera three for measuring the groove on the main spindle, with two CCD cameras three arranged in a front-to-back pattern on each mounting base.

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