Roundness tester for sphere

Abstract

The utility model relates to a sphere roundness tester, which comprises a frame body, a bearing seat, a lifting driving mechanism, a clamping seat, a clamping driving mechanism, an infrared detection piece, a roundness detection mechanism and a processor, and is characterized in that the bearing seat is installed at the output end of the lifting driving mechanism, and the clamping seat is rotatably connected to the clamping driving mechanism; the infrared detection piece is used for sending a detection signal to the processor when detecting that the ball ascends to shield light, so as to control the lifting driving mechanism to stop driving the bearing seat to ascend and obtain diameter data of the ball; the roundness detection mechanism comprises a detection plate, an electronic ruler and a pushing assembly, the detection plate is arranged at the detection end of the electronic ruler, the processor is electrically connected with the electronic ruler, and the pushing assembly is used for driving the electronic ruler to move so that the detection plate can make contact with a to-be-detected ball; when the lifting driving mechanism drives the bearing seat to drive the sphere to rotate, the electronic ruler collects displacement data of the detection plate. The method has the effects of efficiently and accurately detecting the roundness of the sphere and reducing the cost.

Description

Technical Field

[0001] The present application relates to the technical field of sphere roundness detection, and in particular to a sphere roundness tester. Background Art

[0002] A sphere roundness tester is a precision instrument used to measure the roundness of spheres. It can detect shape errors and is an indispensable piece of testing equipment in fields such as quality inspection. Sphere roundness testers typically utilize high-precision sensors and advanced computing technology to quickly and accurately complete testing tasks and provide detailed test reports, providing a crucial basis for product quality control.

[0003] For example, a roundness tester and a roundness test method with the existing publication number CN111256613A, whose technical solution includes a support plate, a ball holding tray and a processor, a first side plate is provided on one side of the support plate, a lifting assembly is connected to one side of the first side plate, a first servo motor is connected to the lifting assembly, the output shaft of the first servo motor is fixedly connected to a rotating rod, the end of the rotating rod away from the first servo motor passes through the support plate and is fixedly connected to the ball holding tray, a ball to be measured is placed on the ball holding tray; a first optical fiber sensor is provided on a side surface of the second side plate close to the third side plate, a second optical fiber sensor adapted to the first optical fiber sensor is provided on a side surface of the third side plate close to the second side plate, and the second optical fiber sensor is located at the same height as the first optical fiber sensor; a shooting device is provided directly above the ball to be measured; the processor is electrically connected to the lifting assembly, the first servo motor, the first sliding assembly, the second sliding assembly, the second servo motor, the first optical fiber sensor, the second optical fiber sensor and the shooting device respectively, and the shooting device is a CCD camera.

[0004] In the above scheme, a lifting assembly is provided to drive the ball-holding plate to be lifted and lowered in the vertical direction; a first servo motor drives the ball-holding plate to rotate 360°; a first fiber optic sensor and a second fiber optic sensor are provided, and when the sphere to be tested rises, the first fiber optic sensor and the second fiber optic sensor on both sides are blocked to obtain the diameter of the sphere, so that the moving distance of the first clamping axis and the second clamping axis can be controlled according to the diameter of the sphere; a shooting device is provided directly above the sphere to be tested, and a CCD camera is used to capture the circumference diameter changes of the sphere to be tested in all directions, so as to test the roundness of the sphere. However, the use of the above-mentioned CCD camera to obtain the circumference diameter changes of the sphere in all directions and the processor to calculate the roundness of the sphere has a high detection efficiency, but the cost is also high. Utility Model Content

[0005] In order to efficiently and accurately detect the roundness of a sphere while reducing costs, the present application provides a sphere roundness tester.

[0006] The present application provides a sphere roundness tester that adopts the following technical solution: a sphere roundness tester, comprising a frame, a supporting seat, a lifting drive mechanism, a clamping seat, a clamping drive mechanism, an infrared detection element, a roundness detection mechanism, and a processor, wherein the supporting seat is used to support and place the sphere, and the lifting drive mechanism is disposed on the frame; the supporting seat is mounted on the output end of the lifting drive mechanism, and is used to drive the supporting seat to move up and down and rotate; the clamping seat is located above the supporting seat, and the clamping seat is rotatably connected to the clamping drive mechanism, and is used to drive the clamping seat to cooperate with the supporting seat to clamp the sphere;

[0007] The infrared detection element is provided on both sides between the clamping seat and the supporting seat, and is used to detect when the sphere is rising and blocking light, so as to send a detection signal to the processor to control the lifting drive mechanism to stop driving the supporting seat to rise, so as to obtain the sphere diameter data;

[0008] The roundness detection mechanism includes a detection plate, an electronic ruler, and a pushing component. The detection plate is arranged at the detection end of the electronic ruler. The processor is electrically connected to the electronic ruler. The pushing component is used to drive the electronic ruler to move so that the detection plate contacts the sphere to be measured; the lifting drive mechanism drives the supporting seat to drive the sphere to rotate, so that the electronic ruler collects displacement data of the detection plate.

[0009] By adopting the above technical solution, the sphere to be measured is placed on the supporting seat, and the lifting drive mechanism drives the supporting seat to move upward. When the infrared detection component detects that the upper end of the sphere is shielded from light, it sends a detection signal to the processor. The diameter of the sphere to be measured is obtained based on the height difference between the supporting seat and the infrared detection component. Then the clamping drive mechanism drives the clamping seat to move downward to cooperate with the supporting seat to clamp the sphere. The roundness detection mechanism drives the electronic ruler and the detection plate to move by pushing the component, so that the detection plate contacts the surface of the sphere to be measured. Then the lifting drive mechanism drives the supporting seat to rotate, thereby driving the sphere to rotate. During the rotation of the sphere, the electronic ruler detects the displacement data of the sphere during rotation through the detection plate. Then the processor obtains the roundness value of the sphere through the diameter data and the displacement data. Compared with using a CCD camera to obtain the roundness value by obtaining the change in the circumference of the sphere, the production cost is reduced.

[0010] Preferably, the lifting drive mechanism includes a first servo motor, a first slider, a first screw rod, a first guide rail, a first extension shaft, and a second servo motor. The first servo motor is installed on the frame, the first screw rod is vertically rotatably connected to the frame, and the output shaft of the first servo motor is coaxially fixedly connected to the first screw rod; the first guide rail is fixedly arranged on the frame and is parallel to the first screw rod, the first slider is threadedly connected to the first screw rod, and is slidingly connected to the first guide rail; the first extension shaft is vertically fixedly arranged on the first slider, the second servo motor is installed on the first slider, the support seat is rotatably connected to the first extension shaft, and the output shaft of the first servo motor passes through the first extension shaft and is fixedly connected to the support seat.

[0011] By adopting the above technical solution, the first servo motor drives the first screw to rotate, thereby driving the first slider to move up and down, and then driving the supporting seat to move upward from the initial position. When the infrared detection component detects the upper end of the sphere, it sends a detection signal to the processor, and the processor then controls the first servo motor to stop working. Since the height of the infrared detection component is fixed, the processor can obtain the rising height of the supporting seat, thereby clearly knowing the height difference between the supporting seat and the infrared detection component, and thus obtain the diameter data of the sphere to be measured. The supporting seat is then driven to rotate by the second servo motor, and the displacement data is obtained through the detection plate of the roundness detection mechanism and the electronic ruler. The processor obtains the roundness value through the ratio of the diameter data and the displacement data.

[0012] Preferably, the electronic ruler is a spring self-resetting displacement sensor, guide blocks are vertically provided on both sides of the electronic ruler, both sides of the detection plate are fixedly provided on guide rods, and the guide rods are slidably connected to the guide blocks.

[0013] By adopting the above technical solution, during the rotation of the sphere, the detection plate contacts the surface of the sphere. Through the spring elastic action of the spring self-resetting displacement sensor, the detection plate is closely attached to the surface of the sphere, so that the displacement sensor can accurately detect the displacement data of the sphere during the rotation of the sphere; at the same time, the stability of the movement of the detection plate can be improved by the guide rod.

[0014] Preferably, the clamping drive mechanism includes a mounting seat, a second screw rod, a second slider, a second guide rail, a bracket, and a driving motor. The second screw rod is vertically rotatably connected to the mounting seat, the second slider is threadedly connected to the second screw rod, the second guide rail is arranged on the mounting seat and is parallel to the second screw rod, the second slider is slidingly connected to the second guide rail, the driving motor is installed on the mounting seat, the output shaft of the driving motor is coaxially fixedly connected to the second screw rod, the bracket is horizontally fixedly connected to the second slider, and the clamping seat is arranged on the bracket.

[0015] By adopting the above technical solution, since the sphere is light in mass and the detection plate is tightly attached to the sphere under the action of the spring, the second screw is driven to rotate by the driving motor, so that the clamping seat follows the bracket to move downward, thereby contacting the upper end of the sphere. The sphere is clamped by the clamping seat and the supporting seat to prevent the sphere from slipping or eccentricity, thereby improving the stability of the sphere rotation and improving the accuracy of the sphere roundness detection.

[0016] Preferably, a mounting block is provided at the end of the bracket, and the mounting block is provided with a vertical hole in the vertical direction, and the mounting block is slidably connected to a movable rod through the vertical hole, and a limiting block is fixedly provided at the upper end of the movable rod, and the clamping seat is rotatably connected to the lower end of the movable rod, and the clamping seat is counterweighted; the mounting block is vertically provided with a vertical slot communicating with the vertical hole, and the upper side wall of the mounting block is vertically provided with a card slot communicating with the vertical hole, and the card slot is communicated with the vertical slot, and the movable rod is horizontally fixed with a shift rod, and the shift rod extends to the outside through the vertical slot.

[0017] By adopting the above technical solution, when the sphere rises to the infrared detection part to complete the sphere diameter detection, the lever is used to rotate the slot, so that the clamping seat moves down and clamps on the sphere, and cooperates with the supporting seat to clamp the sphere, thereby avoiding the clamping seat affecting the detection of the sphere diameter.

[0018] Preferably, the infrared detection component includes an infrared transmitter and an infrared receiver, the infrared transmitter and the infrared receiver are correspondingly arranged on both sides between the clamping seat and the supporting seat, and the infrared receiver is electrically connected to the processor.

[0019] By adopting the above technical solution, the infrared transmitter and infrared receiver are respectively installed on both sides between the clamping seat and the supporting seat. When the sphere rises, the upper end of the sphere blocks the light emitted by the infrared transmitter, so that the infrared receiver fails to receive the light signal and sends a signal to the processor.

[0020] Preferably, the pushing assembly includes a fixed seat, a third screw rod, a third slider, a third guide rail and a third servo motor. The third screw rod is horizontally rotatably connected to the fixed seat, the third slider is threadedly connected to the third screw rod, the third guide rail is fixedly arranged on the fixed seat and arranged parallel to the third screw rod, the third slider is slidably connected to the third guide rail, and the electronic ruler is fixedly arranged on the third slider.

[0021] By adopting the above technical solution, when the detection plate is in the initial position, the horizontal distance between the detection plate and the supporting seat is determined. When the sphere diameter detection is completed, the processor controls the third servo motor to drive the third slider to move the detection plate to a determined distance, so that the detection plate moves to a horizontal distance from the supporting seat that is the radius of the detection sphere.

[0022] Preferably, a switching mechanism for switching the angle of the sphere is also included, and the switching mechanism includes two clamping blocks, two second extension shafts, two mounting frames, a fourth servo motor and two drive assemblies, the two clamping blocks are respectively located on both sides between the clamping seat and the supporting seat, the clamping block is rotatably connected to the end of the second extension shaft, the second extension shaft is horizontally fixed to the mounting frame, the fourth servo motor is installed on one of the mounting frames, and the output shaft of the fourth servo motor extends through the second extension shaft and is fixedly connected to the clamping block, and the drive assembly is installed on the frame body, and is used to drive the two clamping blocks to approach each other to clamp the sphere or move away from each other.

[0023] By adopting the above technical solution, when the detection of the sphere along one of the circumference directions is completed, the two mounting frames are driven to move respectively by the two driving components, thereby driving the two second extension shafts to approach each other, thereby driving the clamping blocks to clamp the sphere, and the supporting seat is driven downward by the lifting drive mechanism, and then the fourth servo motor drives one of the clamping blocks to rotate, thereby driving the sphere to rotate an angle, and then the lifting drive mechanism drives the supporting seat to move up again to support the sphere, and the sphere roundness detection is performed again, so that the circumference of the sphere in multiple directions is detected, thereby improving the detection accuracy.

[0024] Preferably, the two driving components are respectively arranged on the frame on both sides of the supporting seat, and the driving components include a fourth screw rod, a fourth guide rail, and a fifth servo motor. The fourth screw rod is horizontally rotatably connected to the frame body, and the guide rail is fixedly arranged on the frame body and is parallel to the fourth screw rod. The lower end of the mounting frame is threadedly connected to the fourth screw rod and is slidingly connected to the fourth guide rail. The fifth servo motor is installed on the frame body and is used to drive the fourth screw rod to rotate.

[0025] By adopting the above technical solution, the fifth servo motors of the two driving assemblies installed on the frame drive the mounting frame to move, thereby driving the two clamping blocks to move closer to each other to clamp the sphere or move away from each other.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The sphere to be measured is placed on the support seat, and the lifting drive mechanism drives the support seat to move upward. When the infrared detection component detects that the upper end of the sphere is shading, it sends a detection signal to the processor. The diameter of the sphere to be measured is obtained according to the height difference between the support seat and the infrared detection component. Then the clamping drive mechanism drives the clamping seat to move downward to cooperate with the support seat to clamp the sphere. The roundness detection mechanism drives the electronic ruler and the detection plate to move by pushing the component, so that the detection plate contacts the surface of the sphere to be measured. Then the lifting drive mechanism drives the support seat to rotate, thereby driving the sphere to rotate. During the rotation of the sphere, the electronic ruler detects the displacement data of the sphere during rotation through the detection plate. Then the processor obtains the roundness value of the sphere through the diameter data and the displacement data. Compared with using a CCD camera to obtain the roundness value by obtaining the circumference change of the sphere, the production cost is reduced.

[0028] 2. After the detection of the sphere along one of the circumference directions is completed, the two mounting frames are driven to move respectively by the two driving components, thereby driving the two second extension shafts to approach each other, thereby driving the clamping blocks to clamp the sphere, and the supporting seat is driven downward by the lifting drive mechanism, and then the fourth servo motor drives one of the clamping blocks to rotate, thereby driving the sphere to rotate an angle, and then the lifting drive mechanism drives the supporting seat to move up again to support the sphere, and the sphere roundness detection is performed again, so that the circumference of the sphere in multiple directions can be detected, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the roundness tester in the embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the installation structure of the lifting drive mechanism, switching mechanism, clamping drive mechanism and roundness detection mechanism in the embodiment of the present application.

[0031] Figure 3 It is a schematic diagram of the installation structure of the lifting drive mechanism in the embodiment of the present application.

[0032] Figure 4 It is a structural diagram of the roundness detection mechanism in the embodiment of the present application.

[0033] Figure 5 It is a structural diagram of the clamping drive mechanism in an embodiment of the present application.

[0034] Figure 6 It is a schematic diagram of the installation structure of the lifting drive mechanism and the switching mechanism in the embodiment of the present application.

[0035] Explanation of the accompanying symbols: 1. body; 11. frame; 2. supporting seat; 21. arc groove; 3. lifting drive mechanism; 31. first servo motor; 32. first slider; 33. first screw rod; 34. first guide rail; 35. first extension shaft; 36. second servo motor; 4. clamping seat; 5. clamping drive mechanism; 51. mounting seat; 52. second screw rod; 53. second slider; 54. second guide rail; 55. bracket; 56. drive motor; 57. mounting block; 571. vertical hole; 572. vertical groove; 573. slot; 58. movable rod; 581. lever; 59. limit block ;6. Infrared detection component;61. Infrared transmitter;62. Infrared receiver;7. Roundness detection mechanism;71. Detection plate;72. Electronic ruler;73. Pushing assembly;731. Fixed seat;732. Third screw rod;733. Third slider;734. Third guide rail;735. Third servo motor;736. Guide block;737. Guide rod;8. Switching mechanism;81. Clamping block;82. Second extension shaft;83. Mounting bracket;84. Fourth servo motor;85. Driving assembly;851. Fourth screw rod;852. Fourth guide rail;853. Fifth servo motor;9. Processor. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-6 This application is described in further detail.

[0037] The embodiment of the present application discloses a roundness tester for a sphere. Figure 1 and Figure 2 The roundness tester includes a body 1, a frame 11, a supporting seat 2, a lifting drive mechanism 3, a clamping seat 4, a clamping drive mechanism 5, an infrared detection element 6, a roundness detection mechanism 7, a switching mechanism 8, and a processor 9. The supporting seat 2 is used to support and place the sphere to be tested, and the frame 11 is installed in the body 1. The lifting drive mechanism 3 is arranged on the frame 11; the supporting seat 2 is installed at the output end of the lifting drive mechanism 3, and is used to drive the supporting seat 2 to move up and down and rotate; the clamping seat 4 is located above the supporting seat 2, and the clamping drive mechanism 5 is installed on the body 1. The clamping seat 4 is rotatably connected to the output end of the clamping drive mechanism 5, and is used to drive the clamping seat 4 to cooperate with the supporting seat 2 to clamp the sphere. The infrared detection element 6 is arranged on the body 1 on both sides between the clamping seat 4 and the supporting seat 2, and is used to detect when the sphere rises and blocks light, so as to send a detection signal to the processor 9 to control the lifting drive mechanism 3 to stop driving the supporting seat 2 to rise, so as to obtain the sphere diameter data. The detection end of the roundness detection mechanism 7 contacts the sphere and is used to obtain the displacement data of the sphere during rotation. The switching mechanism 8 is installed on the frame 11 and is used to switch the angle of the sphere and perform roundness detection in different circumference directions of the sphere.

[0038] The sphere to be measured is placed on the support seat 2, and the lifting drive mechanism 3 drives the support seat 2 to move upward. When the infrared detection element 6 detects that the upper end of the sphere is shading, it sends a detection signal to the processor 9. The diameter of the sphere to be measured is obtained based on the height difference between the support seat 2 and the infrared detection element 6. Then the clamping drive mechanism 5 drives the clamping seat 4 to move downward to cooperate with the support seat 2 to clamp the sphere. Then the lifting drive mechanism 3 drives the support seat 2 to rotate, thereby driving the sphere to rotate. The sphere rotates with the vertical direction as the axis. The detection end of the roundness detection mechanism 7 contacts the sphere, so that the displacement data between the sphere surface and the axis in the circumferential direction of the sphere can be obtained. Then the processor 9 obtains the roundness value of the sphere through the diameter data and the displacement data. Compared with using a CCD camera to obtain the roundness value by obtaining the change in the circumference of the sphere, the production cost is reduced. The switching mechanism 8 can perform multiple detections on the circumference of the sphere in different directions, thereby improving the accuracy of sphere detection.

[0039] Reference Figure 1 and Figure 2 Specifically, the infrared detection element 6 includes an infrared emitter 61 and an infrared receiver 62. The infrared emitter 61 and the infrared receiver 62 are respectively arranged on the body 1 on both sides between the clamping seat 4 and the supporting seat 2. The infrared receiver 62 is electrically connected to the processor 9. The infrared emitter 61 and the infrared receiver 62 are respectively installed on both sides between the clamping seat 4 and the supporting seat 2. When the sphere rises, the upper end of the sphere blocks the light emitted by the infrared emitter 61, so that the infrared receiver 62 cannot receive the light signal, and then sends a signal to the processor 9.

[0040] Reference Figure 2 and Figure 3Specifically, the lifting drive mechanism 3 includes a first servo motor 31, a first slider 32, a first screw rod 33, a first guide rail 34, a first extension shaft 35, and a second servo motor 36. The first servo motor 31 is vertically mounted on the lower side of the frame 11. The first screw rod 33 is vertically rotatably connected to the frame 11. The output shaft of the first servo motor 31 is coaxially fixedly connected to the first screw rod 33. The first guide rail 34 is vertically fixedly mounted on the frame 11 and is parallel to the first screw rod 33. The first slider 32 is threadedly connected to the first screw rod 33 and is slidably connected to the first guide rail 34. The first extension shaft 35 is vertically fixedly mounted on the first slider 32 and extends out of the machine body 1. The second servo motor 36 is mounted on the first slider 32. The support seat 2 is rotatably connected to the upper end of the first extension shaft 35. The output shaft of the first servo motor 31 passes through the first extension shaft 35 and is fixedly connected to the support seat 2. The upper surface of the support seat 2 has an arc groove 21. The first servo motor 31 drives the first screw rod 33 to rotate, thereby driving the first slider 32 to move up and down, and then driving the supporting seat 2 to move upward from the initial position. When the infrared detection component 6 detects the top of the sphere, it sends a detection signal to the processor 9, and the processor 9 then controls the first servo motor 31 to stop working. Since the height of the infrared detection component 6 is fixed, the processor 9 can obtain the rising height of the supporting seat 2, thereby clearly knowing the vertical height difference between the supporting seat 2 and the infrared detection component 6, and thus obtaining the diameter data of the sphere to be measured, and then the second servo motor 36 is used to drive the supporting seat 2 to rotate, and the roundness detection mechanism 7 is used to obtain the displacement data of the sphere. The processor 9 obtains the roundness value through the ratio of the diameter data and the displacement data.

[0041] Reference Figure 1 and Figure 4 Specifically, the roundness detection mechanism 7 includes a detection plate 71, an electronic ruler 72, and a pushing component 73. The detection plate 71 is arranged at the detection end of the electronic ruler 72. The processor 9 is electrically connected to the electronic ruler 72. The pushing component 73 is used to drive the electronic ruler 72 to move so that the detection plate 71 contacts the sphere to be measured; the lifting drive mechanism 3 drives the supporting seat 2 to drive the sphere to rotate, so that the electronic ruler 72 collects the displacement data of the detection plate 71, and the displacement data collected by the electronic ruler 72 is transmitted to the processor 9. The electronic ruler 72 in this application is a spring self-resetting displacement sensor. During the rotation of the sphere, the detection plate 71 contacts the surface of the sphere. Through the spring elastic action of the spring self-resetting displacement sensor, the detection plate 71 is tightly attached to the surface of the sphere, so that the displacement sensor can accurately detect the displacement data during the rotation of the sphere.

[0042] Reference Figure 1 and Figure 5Specifically, the clamping drive mechanism 5 includes a mounting seat 51, a second screw rod 52, a second slider 53, a second guide rail 54, a bracket 55, and a driving motor 56. The mounting seat 51 is fixedly set on the body 1, the second screw rod 52 is vertically rotatably connected to the mounting seat 51, the second slider 53 is threadedly connected to the second screw rod 52, the second guide rail 54 is set on the mounting seat 51 and is parallel to the second screw rod 52, the second slider 53 is slidingly connected to the second guide rail 54, the driving motor 56 is installed on the mounting seat 51, the output shaft of the driving motor 56 is coaxially fixedly connected to the second screw rod 52, the bracket 55 is horizontally fixedly connected to the second slider 53, and the clamping seat 4 is set at the end of the bracket 55. Since the sphere is light in weight, and the detection plate 71 is tightly attached to the sphere under the action of the spring, the second screw 52 is driven to rotate by the drive motor 56, so that the clamping seat 4 follows the bracket 55 to move downward, thereby contacting the upper end of the sphere. The clamping seat 4 and the supporting seat 2 cooperate to clamp the sphere to prevent the sphere from slipping or eccentricity, thereby improving the stability of the sphere's rotation and improving the accuracy of the sphere's roundness detection.

[0043] The bracket 55 has a mounting block 57 at its end. The mounting block 57 has a vertical hole 571 formed in the vertical direction. A movable rod 58 is slidably connected to the mounting block 57 through the vertical hole 571. A limit block 59 is fixedly provided at the upper end of the movable rod 58. The clamping seat 4 is rotatably connected to the lower end of the movable rod, and the clamping seat 4 is provided with a counterweight. The mounting block 57 has a vertical slot 572 that communicates with the vertical hole 571. A slot 573 that communicates with the vertical hole 571 is vertically formed on the upper sidewall of the mounting block 57. The slot 573 communicates with the vertical slot 572. A lever 581 is fixedly provided horizontally on the movable rod 58. The lever 581 extends outward through the vertical slot 572. When the sphere rises to the infrared detection element 6 for diameter detection, the lever 581 rotates the slot 573, causing the clamping seat 4 to move downward and clamp onto the sphere, cooperating with the support seat 2 to clamp the sphere, thereby preventing the clamping seat 4 from affecting the diameter detection.

[0044] Reference Figure 4 The pushing assembly 73 includes a fixed seat 731, a third screw rod 732, a third slider 733, a third guide rail 734, and a third servo motor 735. The third screw rod 732 is horizontally rotatably connected to the fixed seat 731. The third slider 733 is threadedly connected to the third screw rod 732. The third guide rail 734 is fixedly arranged on the fixed seat 731 and arranged parallel to the third screw rod 732. The third slider 733 is slidably connected to the third guide rail 734. The electronic ruler 72 is fixedly arranged on the third slider 733. When the detection plate 71 is in the initial position, the horizontal distance between the detection plate 71 and the supporting seat 2 is determined. After the sphere diameter detection is completed, the processor 9 controls the third servo motor 735 to drive the third slider 733 to drive the detection plate 71 to move a determined distance, so that the detection plate 71 moves to a horizontal distance between the detection plate 71 and the supporting seat 2 equal to the radius of the detection sphere.

[0045] Furthermore, in order to improve the stability of the movement of the detection plate 71, guide blocks 736 are vertically provided on both sides of the fixed seat 731, and both sides of the detection plate 71 are fixedly provided on the guide rods 737, and the guide rods 737 are slidably connected to the guide blocks 736.

[0046] Reference Figure 1 and Figure 6 Specifically, the switching mechanism 8 includes two clamping blocks 81, two second extension shafts 82, two mounting frames 83, a fourth servo motor 84 and two driving assemblies 85. The two clamping blocks 81 are respectively located on both sides between the clamping seat 4 and the supporting seat 2. The clamping blocks 81 are rotatably connected to the end of the second extension shaft 82. The second extension shaft 82 is horizontally fixed on the mounting frame 83. The fourth servo motor 84 is installed on one of the mounting frames 83, and the output shaft of the fourth servo motor 84 extends through the second extension shaft 82 and is fixedly connected to the clamping block 81. The driving assembly 85 is installed on the frame 11, and is used to drive the two clamping blocks 81 to approach each other to clamp the sphere or move away from each other. When the detection of the sphere along one of the circumference directions is completed, the two mounting frames 83 are driven to move by the two driving components 85 respectively, thereby driving the two second extension shafts 82 to approach each other, thereby driving the clamping block 81 to clamp the sphere, and the supporting seat 2 is driven downward by the lifting drive mechanism 3, and then the fourth servo motor 84 drives one of the clamping blocks 81 to rotate, thereby driving the sphere to rotate an angle, and then the lifting drive mechanism 3 drives the supporting seat 2 to move up again to support the sphere, and the sphere roundness detection is performed again, so as to detect the circumference of the sphere in multiple directions, thereby improving the detection accuracy.

[0047] Furthermore, two drive assemblies 85 are respectively disposed on the frame 11 on both sides of the support seat 2. The drive assemblies 85 include a fourth screw 851, a fourth guide rail 852, and a fifth servo motor 853. The fourth screw 851 is horizontally rotatably connected to the frame 11. The fourth guide rail 852 is fixedly disposed on the frame 11 and is parallel to the fourth screw 851. The lower end of the mounting frame 83 is threadedly connected to the fourth screw 851 and is slidably connected to the fourth guide rail 852. The fifth servo motor 853 is mounted on the frame 11 and drives the fourth screw 851 to rotate via a pulley. The fifth servo motor 853 of the two drive assemblies 85 mounted on the frame 11 drives the mounting frame 83 to move, thereby driving the two clamping blocks 81 to move closer to each other to clamp the sphere or away from each other.

[0048] The implementation principle of a roundness tester for a sphere in an embodiment of the present application is as follows: a sphere to be tested is placed on a supporting seat 2, and a lifting drive mechanism 3 drives the supporting seat 2 to move upward. When the infrared receiver 62 detects that the upper end of the sphere is shading, a detection signal is sent to the processor 9. The processor 9 obtains the diameter of the sphere to be tested based on the height difference between the supporting seat 2 and the infrared detection component 6, and then controls the clamping drive mechanism 5 to drive the clamping seat 4 to move downward to cooperate with the supporting seat 2 to clamp the sphere. The lifting drive mechanism 3 then drives the supporting seat 2 to rotate, thereby driving the sphere to rotate. During the rotation of the sphere, the detection plate 71 contacts the surface of the sphere. Through the spring elastic action of the spring self-resetting displacement sensor, the detection plate 71 is close to the surface of the sphere, so that the displacement sensor can accurately detect the displacement data during the rotation of the sphere. Then, the processor 9 obtains the roundness value of the sphere through the diameter data and the displacement data. Compared with using a CCD camera to obtain the roundness value by obtaining the change in the circumference of the sphere, the production cost is reduced.

[0049] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sphere roundness tester, characterized in that: The invention comprises a frame (11), a supporting seat (2), a lifting drive mechanism (3), a clamping seat (4), a clamping drive mechanism (5), an infrared detection element (6), a roundness detection mechanism (7) and a processor (9), wherein the supporting seat (2) is used for supporting and placing a sphere, and the lifting drive mechanism (3) is arranged on the frame (11); the supporting seat (2) is installed at the output end of the lifting drive mechanism (3) and is used for driving the supporting seat (2) to lift up and down and rotate; the clamping seat (4) is located above the supporting seat (2), and the clamping seat (4) is rotatably connected to the clamping drive mechanism (5) and is used for driving the clamping seat (4) to cooperate with the supporting seat (2) to clamp the sphere; The infrared detection element (6) is arranged on both sides between the clamping seat (4) and the supporting seat (2) and is used to detect when the sphere is rising and blocking light, so as to send a detection signal to the processor (9) to control the lifting drive mechanism (3) to stop driving the supporting seat (2) to rise, so as to obtain the sphere diameter data; The roundness detection mechanism (7) comprises a detection plate (71), an electronic ruler (72), and a pushing assembly (73); the detection plate (71) is arranged at the detection end of the electronic ruler (72); the processor (9) is electrically connected to the electronic ruler (72); the pushing assembly (73) is used to drive the electronic ruler (72) to move so that the detection plate (71) contacts the sphere to be measured; and the lifting drive mechanism (3) drives the supporting seat (2) to drive the sphere to rotate so that the electronic ruler (72) collects displacement data of the detection plate (71).

2. The sphere roundness tester according to claim 1, characterized in that: The lifting drive mechanism (3) comprises a first servo motor (31), a first slider (32), a first screw rod (33), a first guide rail (34), a first extension shaft (35), and a second servo motor (36). The first servo motor (31) is mounted on the frame (11). The first screw rod (33) is vertically rotatably connected to the frame (11). The output shaft of the first servo motor (31) is coaxially fixedly connected to the first screw rod (33). The first guide rail (34) is fixedly arranged on the frame (11) and The first slider (32) is parallel to the first screw rod (33), is threadedly connected to the first screw rod (33), and is slidingly connected to the first guide rail (34); the first extension shaft (35) is vertically fixed on the first slider (32), the second servo motor (36) is installed on the first slider (32), the support seat (2) is rotatably connected to the first extension shaft (35), and the output shaft of the first servo motor (31) passes through the first extension shaft (35) and is fixedly connected to the support seat (2).

3. The sphere roundness tester according to claim 1, characterized in that: The electronic ruler (72) is a spring self-resetting displacement sensor. Guide blocks (736) are vertically arranged on both sides of the electronic ruler (72). Both sides of the detection plate (71) are fixedly arranged on guide rods (737). The guide rods (737) are slidably connected to the guide blocks (736).

4. The sphere roundness tester according to claim 3, characterized in that: The clamping drive mechanism (5) comprises a mounting seat (51), a second screw rod (52), a second slider (53), a second guide rail (54), a bracket (55), and a driving motor (56); the second screw rod (52) is vertically rotatably connected to the mounting seat (51); the second slider (53) is threadedly connected to the second screw rod (52); the second guide rail (54) is arranged on the mounting seat (51) and is parallel to the second screw rod (52); the second slider (53) is slidingly connected to the second guide rail (54); the driving motor (56) is mounted on the mounting seat (51); the output shaft of the driving motor (56) is coaxially fixedly connected to the second screw rod (52); the bracket (55) is horizontally fixedly connected to the second slider (53); and the clamping seat (4) is arranged on the bracket (55).

5. The sphere roundness tester according to claim 4, characterized in that: The bracket (55) is provided with a mounting block (57) at the end thereof. The mounting block (57) is provided with a vertical hole (571) in the vertical direction. The mounting block (57) is slidably connected to a movable rod (58) through the vertical hole (571). A limit block (59) is fixedly provided at the upper end of the movable rod (58). The clamping seat (4) is rotatably connected to the lower end of the movable rod. The clamping seat (4) is provided with a counterweight. The mounting block (57) is vertically provided with a vertical slot (572) communicating with the vertical hole (571). The upper side wall of the mounting block (57) is vertically provided with a clamping slot (573) communicating with the vertical hole (571). The clamping slot (573) is communicated with the vertical slot (572). The movable rod (58) is horizontally fixed with a shifting rod (581). The shifting rod (581) extends out of the outside through the vertical slot (572).

6. The sphere roundness tester according to claim 1, characterized in that: The infrared detection component (6) includes an infrared transmitter (61) and an infrared receiver (62), wherein the infrared transmitter (61) and the infrared receiver (62) are correspondingly arranged on two sides between the clamping seat (4) and the supporting seat (2), and the infrared receiver (62) is electrically connected to the processor (9).

7. The sphere roundness tester according to claim 1, characterized in that: The pushing assembly (73) comprises a fixed seat (731), a third screw rod (732), a third slider (733), a third guide rail (734) and a third servo motor (735); the third screw rod (732) is horizontally rotatably connected to the fixed seat (731); the third slider (733) is threadedly connected to the third screw rod (732); the third guide rail (734) is fixedly arranged on the fixed seat (731) and arranged parallel to the third screw rod (732); the third slider (733) is slidably connected to the third guide rail (734); and the electronic ruler (72) is fixedly arranged on the third slider (733).

8. The sphere roundness tester according to claim 1, characterized in that: The invention also includes a switching mechanism (8) for switching the angle of the sphere, wherein the switching mechanism (8) includes two clamping blocks (81), two second extension shafts (82), two mounting frames (83), a fourth servo motor (84) and two driving assemblies (85). The two clamping blocks (81) are respectively located on both sides between the clamping seat (4) and the supporting seat (2). The clamping blocks (81) are rotatably connected to the ends of the second extension shafts (82). The second extension shafts (82) are horizontally fixedly arranged on the mounting frames (83). The fourth servo motor (84) is installed on one of the mounting frames (83), and the output shaft of the fourth servo motor (84) extends through the second extension shafts (82) and is fixedly connected to the clamping blocks (81). The driving assembly (85) is installed on the frame (11) and is used to drive the two clamping blocks (81) to move closer to each other to clamp the sphere or move away from each other.

9. The sphere roundness tester according to claim 8, characterized in that: The two driving assemblies (85) are respectively arranged on the frame (11) on both sides of the supporting seat (2), and the driving assembly (85) includes a fourth screw rod (851), a fourth guide rail (852), and a fifth servo motor (853). The fourth screw rod (851) is horizontally rotatably connected to the frame (11), the fourth guide rail (852) is fixedly arranged on the frame (11) and is parallel to the fourth screw rod (851). The lower end of the mounting frame (83) is threadedly connected to the fourth screw rod (851) and is slidingly connected to the fourth guide rail (852). The fifth servo motor (853) is installed on the frame (11) and is used to drive the fourth screw rod (851) to rotate.

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