Sphere spherical surface expansion device

Abstract

The present invention discloses a spherical surface unfolding device of a sphere, the main points of which are: comprising a friction disc, a friction disc driving device, a sphere tray assembly and a bottom plate. The sphere tray assembly comprises a sphere displacement turntable, and the sphere displacement turntable is rotatably arranged above the friction disc. The sphere displacement turntable is provided with a sphere limiting hole running through the top and bottom thereof, and the aperture of the sphere limiting hole corresponds to the diameter of the sphere. The corresponding part of the middle part of the sphere is located in the sphere limiting hole, and the corresponding part of the lower part of the sphere is in contact with the friction disc. The displacement turntable is used to change the displacement of the sphere in the horizontal plane to change the working position, and the sphere can rotate freely in the sphere limiting hole. The friction disc driving device is arranged on the bottom plate, and the friction disc driving device drives the friction disc to move in the same horizontal plane. The friction disc enables the sphere to rotate freely in situ in the sphere limiting hole through friction force.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, in particular to a spherical surface unfolding device used in an automated machine vision detection system. Background Art

[0002] Ball bearings are widely used general-purpose mechanical products. Balls are spheres with a huge demand, and their surface quality directly affects the quality of bearings. At present, most of the balls used in bearings are steel balls. Compared with steel balls, silicon nitride ceramic bearing balls have the characteristics of small thermal expansion coefficient, small friction coefficient, oil-free self-lubrication, high speed, long life, insulation, etc., and will surely have broad application prospects in the fields of aviation and aerospace in the future. However, due to the brittleness of ceramic materials, surface defects may occur at various stages of ceramic ball manufacturing and processing. Defects on the surface and sub-surface can significantly reduce the fatigue life of ceramic balls. Therefore, it is very important to detect the surface quality of ceramic balls during the production process.

[0003] At present, when testing the surface quality of steel balls or ceramic balls, bearing ball manufacturers in my country basically use manual visual inspection to inspect the surface of the ball, that is, using a microscope to move the ball with the help of ambient light to observe the surface of the ball. When a defective ball is found, it is manually selected. This method of using the human eye to detect has the following two disadvantages: First, the surface of polished balls such as steel balls or ceramic balls is bright and highly reflective, which can easily irritate the eyes, so the human eye is very easy to fatigue when observed under a microscope; second, the manual detection method cannot guarantee that the surface of the ball to be tested is the entire surface, so the accuracy is difficult to guarantee.

[0004] With the development of science and technology, automated machine vision inspection systems are increasingly used in industrial inspections, using machines instead of human eyes to make measurements and judgments. In order to fully scan the sphere, a device for spherical expansion of the sphere is required. Existing automated machine vision inspection systems usually consist of two parts: a spherical expansion device and a microscopic image detection device. Most of the spherical expansion devices have complex structures and cannot achieve continuous operation; and the microscope in the microscopic image detection device needs to be equipped with a corresponding drive device to adjust its shooting position and angle, which not only increases the cost, but also has low efficiency. The sphere is clamped and fixed by the corresponding fixture during the inspection process, which can easily cause damage to the sphere. Moreover, the smaller the diameter of the sphere, the more difficult it is to fix. Summary of the invention

[0005] The purpose of the present invention is to provide a spherical surface unfolding device which has a simple structure and can continuously detect and is used in an automated machine vision detection system.

[0006] The basic technical scheme for achieving the purpose of the present invention is: a spherical surface unfolding device of a sphere, which has the following structural features: it includes a friction disc, a friction disc driving device, a spherical tray assembly and a bottom plate. The spherical tray assembly includes a spherical displacement turntable, which is rotatably arranged above the friction disc. The spherical displacement turntable is provided with a spherical limiting hole running through it from top to bottom, and the aperture of the spherical limiting hole corresponds to the diameter of the sphere. The corresponding part of the middle part of the sphere is located in the spherical limiting hole, and the corresponding part of the lower part of the sphere is in contact with the friction disc. The displacement turntable is used to change the displacement of the sphere in the horizontal plane to change the working position, and the sphere can rotate freely in the spherical limiting hole. The friction disc driving device is arranged on the bottom plate, and the friction disc driving device drives the friction disc to move in the same horizontal plane. The friction disc causes the sphere to rotate freely in situ in the spherical limiting hole through friction force.

[0007] The technical solution based on the above basic technical solution is: the surface of the friction disc is made of polyurethane material.

[0008] The technical solution based on the above corresponding technical solution is: the rear part of the friction disc is provided with a discharge notch which runs through the upper and lower parts and opens backward. A movable plate which can be opened and closed is provided in the discharge notch, and the left end of the movable plate is hingedly connected to the friction disc to seal the discharge notch of the friction disc, and the movable plate is driven by a cylinder to realize flipping and opening.

[0009] The technical solution based on the above corresponding technical solutions is: a material guide trough is provided on the movable plate.

[0010] The technical solution based on the above-mentioned corresponding technical solutions is: the friction disk driving device includes an X-axis driving assembly and a Y-axis driving assembly. The X-axis driving assembly is arranged on the bottom plate, and the Y-axis driving assembly is arranged on the X-axis moving seat of the X-axis assembly, and the X-axis driving assembly and the Y-axis driving assembly realize the movement of the friction disk along the X-axis and Y-axis in the same horizontal plane.

[0011] The technical scheme based on the above-mentioned corresponding technical schemes is: the X-axis drive assembly also includes an X-axis stepper motor, an X-axis lead screw, an X-axis ball screw nut, an X-axis lead screw nut seat and an X-axis linear sliding unit. The X-axis stepper motor is fixedly arranged on the rear right side of the base plate by its motor housing through the corresponding X-axis motor mounting seat, and its motor shaft extends to the left. The X-axis lead screw is arranged on the rear part of the base plate in a left-right direction through the corresponding lead screw bearing seat. The right end of the X-axis lead screw is connected to the motor shaft of the X-axis stepper motor through a coupling. The X-axis ball screw nut is arranged on the X-axis lead screw. The X-axis lead screw nut seat is fixedly arranged on the X-axis ball screw nut. There are 2 groups of X-axis linear sliding units, and the 2 groups of X-axis linear sliding units both adopt SBR circular guide rails. The 2 groups of X-axis linear sliding units are arranged on the base plate in parallel from front to back. The base of the X-axis linear sliding unit is fixedly arranged on the base plate. The X-axis moving seat is fixedly arranged on the sliders of the 2 groups of X-axis linear sliding units. The X-axis moving seat is fixedly connected to the X-axis lead screw nut seat, so that the X-axis moving seat is driven by the X-axis stepping motor to move left and right along the X-axis linear sliding unit.

[0012] The technical scheme based on the above-mentioned corresponding technical schemes is: the Y-axis driving assembly includes a Y-axis stepping motor, a Y-axis lead screw, a Y-axis ball screw nut, a Y-axis lead screw nut seat, a Y-axis moving seat, a Y-axis linear sliding unit and a Y-axis mounting plate. The Y-axis mounting plate is fixedly arranged on the upper side of the X-axis moving seat of the X-axis driving assembly. The Y-axis stepping motor is fixedly arranged on the rear right side of the Y-axis mounting plate by its motor housing through the corresponding Y-axis motor mounting seat, and its motor shaft extends forward. The Y-axis lead screw is arranged on the left part of the Y-axis mounting plate through the corresponding lead screw bearing seat to rotate in the front-back direction. The rear end of the Y-axis lead screw is connected to the motor shaft of the Y-axis stepping motor through a coupling. The Y-axis ball screw nut is arranged on the Y-axis lead screw. The Y-axis lead screw nut seat is fixedly arranged on the Y-axis ball screw nut. There are 2 groups of Y-axis linear sliding units, and the 2 groups of Y-axis linear sliding units both use SBR round guide rails. The 2 groups of Y-axis linear sliding units are arranged parallel to each other from left to right on the Y-axis mounting plate. The base of the Y-axis linear sliding unit is fixed on the X-axis moving seat. The Y-axis moving seat is fixed on the sliders of the two sets of Y-axis linear sliding units. The Y-axis moving seat is fixedly connected to the Y-axis screw nut seat, so that the Y-axis moving seat is driven by the Y-axis stepper motor to move forward and backward along the Y-axis linear sliding unit. The friction disk is fixed on the upper side of the Y-axis moving seat.

[0013] The technical scheme based on the above-mentioned corresponding technical schemes is: the ball tray assembly also includes a rotating stepper motor and a turntable mounting shaft. The friction disk is square, and the side length of the friction disk is greater than the sum of the diameter of the ball displacement turntable and twice the circumference of the sphere to be measured. The motor shaft of the rotating stepper motor is set downward. The turntable mounting shaft is connected to the motor shaft of the rotating stepper motor through a coupling transmission. The ball displacement turntable is detachably coaxially fixed on the lower end of the turntable mounting shaft. The ball displacement turntable is provided with a group of ball limit holes running through it at equal intervals along its circumference. The center of the sphere is located in the ball limit hole.

[0014] The technical solution based on the above-mentioned corresponding technical solutions is: a guide seat is provided on the upper side of the ball limiting hole of the ball displacement turntable of the ball tray assembly, and the guide seat is provided with a central through hole running through the upper and lower parts thereof, the diameter of the central through hole is the same as the diameter of the ball limiting hole, and the central through hole and the ball limiting hole are coaxially arranged. The upper end of the inner hole wall of the guide seat is provided with a rounded corner.

[0015] The technical solution based on the above-mentioned corresponding technical solutions is: the diameter of the ball limiting hole of the ball displacement turntable of the ball tray assembly is 0.1 mm to 2.0 mm larger than the diameter of the ball.

[0016] The depth of the ball limit hole is 1.0 mm to 3.0 mm. The guide seat is 0.5 mm to 1.5 mm higher than the upper surface of the ball displacement turntable.

[0017] The present invention has the following beneficial effects: (1) The spherical surface unfolding device of the present invention has a simple structure and can be applied to the spherical surface unfolding of spheres of different diameters, realizing continuous detection of spheres such as steel balls or ceramic balls, and greatly improving detection efficiency. The present invention realizes the original spherical surface unfolding of the sphere, and the single-ball unfolding detection can perform a full range of detection on each ball. During the detection process, the microscope of the microscopic image detection device remains fixed, which greatly improves the measurement accuracy, reduces the false detection rate, and is conducive to reducing the volume of the overall equipment.

[0018] (2) The detection process of the spherical surface unfolding device of the present invention is a single detection, which solves the shortcomings of the current batch detection results such as large errors.

[0019] (3) The ball displacement turntable of the ball tray assembly of the present invention can be replaced according to the diameter of the ball to be tested, and has strong adaptability and a wide range of applications.

[0020] (4) The working principle of the present invention is simple and clear. A complete spherical surface unfolding system is composed of fewer modules. The friction disk drive device of the spherical surface unfolding device is composed of an X-axis drive component and a Y-axis drive component. The mechanical structure is simple and reliable, the entire detection operation process is controllable, and the maintenance cost is low. The surface of the friction disk is made of polyurethane material, which can ensure that the sphere can rotate on its own without causing damage to the sphere when it falls into it.

[0021] (5) The sphere of the spherical surface unfolding device of the present invention is limited by the sphere limiting hole of the sphere displacement turntable and realizes self-rotation by friction, thereby avoiding damage to the sphere caused by traditional clamps and solving the problem that spheres with smaller diameters are difficult to fix.

[0022] (6) The center of the sphere of the spherical surface unfolding device of the present invention is located in the sphere limiting hole, which can prevent the sphere from escaping from the sphere limiting hole and reserve as much detection and shooting surface as possible, thereby improving the detection quality.

[0023] (7) A guide seat is provided on the upper side of the ball limiting hole of the ball displacement turntable of the spherical surface unfolding device of the present invention, and a chamfer is provided on the upper end of the inner hole wall of the guide seat to facilitate the ball to fall into the ball limiting hole quickly and accurately, which does not affect the range of the detection and shooting surface and can prevent the ball from falling out of the ball limiting hole.

[0024] (8) The spherical surface unfolding device of the present invention is provided with a movable plate, and a material guide groove is provided on the movable plate, so as to facilitate the discharge of materials after the sphere detection is completed. The discharge is fast, and the material is easy to guide and collect without damaging the sphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the spherical surface unfolding device of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the left side;

[0027] Figure 3 for Figure 1 A right side schematic diagram of

[0028] Figure 4 for Figure 1 A rear view schematic diagram of

[0029] Figure 5 for Figure 1 A top view schematic diagram of

[0030] Figure 6 For Figure 1 Schematic diagram when viewed from the upper left front;

[0031] Figure 7 For Figure 1 Schematic diagram when viewed from the upper right front;

[0032] Figure 8 For Figure 1 Schematic diagram when observing from the lower right front;

[0033] Fig. 9 For Figure 1 A schematic diagram of the ball tray assembly when viewed from the upper left front;

[0034] Fig.10 For Figure 1 Schematic diagram of the sphere tray assembly when viewed from the lower left front.

[0035] The reference numerals in the accompanying drawings are:

[0036] Friction disc 1, movable plate 11, guide trough 11-1,

[0037] Friction disc drive 2,

[0038] X-axis drive assembly 21, X-axis stepper motor 21-1, X-axis lead screw 21-2, X-axis ball screw nut 21-3, X-axis lead screw nut seat 21-4, X-axis moving seat 21-5, X-axis linear sliding unit 21-6,

[0039] Y-axis drive assembly 22, Y-axis stepper motor 22-1, Y-axis screw 22-2, Y-axis ball screw nut 22-3, Y-axis screw nut seat 22-4, Y-axis moving seat 22-5, Y-axis linear sliding unit 22-6, Y-axis mounting plate 22-7,

[0040] Ball tray assembly 3, rotating stepper motor 31, ball displacement turntable 32, ball limit hole 32-1, guide seat 32-2, turntable mounting shaft 33,

[0041] Base plate 4, sphere 10. DETAILED DESCRIPTION

[0042] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings. Figure 1 The direction shown is carried out, that is, Figure 1 The up, down, left, and right directions shown are the up, down, left, and right directions described. Figure 1 The direction is forward, away from Figure 1 The left-right direction is the X-axis direction, and the front-back direction is the Y-axis direction.

[0043] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] It should be understood that terms such as "upper", "lower", "inside" and "outside" to indicate directions or positional relationships are based on the positional relationships described in the drawings and are only used to facilitate the description of the present invention or simplify the description, rather than to indicate a specific direction that must be possessed.

[0045] (Example 1)

[0046] See Figures 1 to 10 The spherical surface unfolding device of the present invention used in the automated machine vision inspection system includes a friction disc 1, a friction disc driving device 2, a spherical tray assembly 3 and a base plate 4.

[0047] See Figures 1 to 8 The friction disc 1 is square, and the surface of the friction disc 1 is made of polyurethane material. The rear part of the friction disc 1 is provided with a discharge notch that runs through the upper and lower parts and opens backward. A movable plate 11 that can be opened and closed is provided in the discharge notch. The left end of the movable plate 11 is hingedly connected to the friction disc 1 to seal the discharge notch of the friction disc 1. The movable plate 11 is driven by a cylinder to realize flipping and opening (the cylinder is not drawn in the figure). A guide groove 11-1 with a larger front and a smaller back is provided on the rear part of the movable plate 11. When the ball 10 (steel ball or ceramic ball) that has been tested is located in the guide groove on the movable plate 11, the movable plate 11 flips downward and opens, and the ball 10 can roll from the guide groove 11-1 to the corresponding judgment module in the automated machine vision inspection system.

[0048] See Figures 1 to 8 The friction disc driving device 2 includes an X-axis driving assembly 21 and a Y-axis driving assembly 22.

[0049] See Figures 1 to 8, the X-axis driving assembly 21 includes an X-axis stepper motor 21-1, an X-axis lead screw 21-2, an X-axis ball screw nut 21-3, an X-axis lead screw nut seat 21-4, an X-axis moving seat 21-5 and an X-axis linear sliding unit 21-6. The X-axis stepper motor 21-1 is fixedly arranged on the right side of the rear part of the base plate 4 by its motor housing through the corresponding X-axis motor mounting seat (the X-axis motor mounting seat is not drawn in the accompanying drawings), and its motor shaft extends to the left. The X-axis lead screw 21-2 is arranged on the rear part of the base plate 4 to rotate in the left and right directions through the corresponding lead screw bearing seat. The right end of the X-axis lead screw 21-2 is connected to the motor shaft of the X-axis stepper motor 21-1 through a coupling. The X-axis ball screw nut 21-3 is arranged on the X-axis lead screw 21-2. The X-axis lead screw nut seat 21-4 is fixedly arranged on the X-axis ball screw nut 21-3. There are two groups of X-axis linear sliding units 21-6, and both groups of X-axis linear sliding units 21-6 use SBR circular guide rails, which include an optical axis, a slider and a base. The two groups of X-axis linear sliding units 21-6 are arranged on the base plate 4 in parallel from front to back. The base of the X-axis linear sliding unit 21-6 is fixedly arranged on the base plate 4. The X-axis moving seat 21-5 is fixedly arranged on the sliders of the two groups of X-axis linear sliding units 21-6. The X-axis moving seat 21-5 is fixedly connected to the X-axis screw nut seat 21-4, so that the X-axis moving seat 21-5 is driven by the X-axis stepping motor 21-1 to move left and right along the X-axis linear sliding unit 21-6.

[0050] See Figures 1 to 8, the Y-axis driving assembly 22 comprises a Y-axis stepping motor 22-1, a Y-axis screw rod 22-2, a Y-axis ball screw nut 22-3, a Y-axis screw nut seat 22-4, a Y-axis moving seat 22-5, a Y-axis linear sliding unit 22-6 and a Y-axis mounting plate 22-7. The Y-axis mounting plate 22-7 is fixedly arranged on the upper side of the X-axis moving seat 21-5 of the X-axis driving assembly 21. The Y-axis stepping motor 22-1 is fixedly arranged on the rear right side of the Y-axis mounting plate 22-7 by its motor housing through the corresponding Y-axis motor mounting seat (the Y-axis motor mounting seat is not drawn in the accompanying drawings), and its motor shaft extends forward. The Y-axis screw rod 22-2 is arranged on the left part of the Y-axis mounting plate 22-7 along the forward and backward rotation through the corresponding screw rod bearing seat. The rear end of the Y-axis screw rod 22-2 is connected to the motor shaft of the Y-axis stepping motor 22-1 through a coupling. The Y-axis ball screw nut 22-3 is arranged on the Y-axis screw 22-2. The Y-axis screw nut seat 22-4 is fixedly arranged on the Y-axis ball screw nut 22-3. There are two groups of Y-axis linear sliding units 22-6, and both groups of Y-axis linear sliding units 22-6 use SBR circular guide rails, which include an optical axis, a slider and a base. The two groups of Y-axis linear sliding units 22-6 are arranged parallel to each other on the Y-axis mounting plate 22-7 from left to right. The base of the Y-axis linear sliding unit 22-6 is fixedly arranged on the X-axis moving seat 21-5. The Y-axis moving seat 22-5 is fixedly arranged on the sliders of the two groups of Y-axis linear sliding units 22-6. The Y-axis moving seat 22-5 is fixedly connected to the Y-axis screw nut seat 22-4, so that the Y-axis moving seat 22-5 is driven by the Y-axis stepping motor 22-1 to move forward and backward along the Y-axis linear sliding unit 22-6. The friction disk 1 is fixedly arranged on the upper side of the Y-axis moving seat 22-5.

[0051] See Figures 1 to 10 The ball tray assembly 3 includes a rotary stepper motor 31, a ball displacement turntable 32 and a turntable mounting shaft 33. The rotary stepper motor 31 is fixedly mounted on a corresponding mounting seat (the mounting seat is not shown in the figure) by its motor housing, and the mounting seat is fixed on a building or a fixed frame in a corresponding automated machine vision inspection system. The motor shaft of the rotary stepper motor 31 faces downward. The turntable mounting shaft 33 is connected to the motor shaft of the rotary stepper motor 31 through a coupling transmission. The ball displacement turntable 32 is detachably and coaxially fixed on the lower end of the turntable mounting shaft 33. The ball displacement turntable 32 is located above the friction disk 1. The ball displacement turntable 32 is provided with a group of ball limiting holes 32-1 that run through it from top to bottom at equal intervals along its circumference. There are 12 ball limiting holes 32-1 in the present embodiment. The center of the ball 10 is located in the ball limiting hole 32-1.

[0052] The side length of the friction disk 1 is greater than the sum of the diameter of the ball displacement rotating disk 32 and twice the circumference of the sphere 10 to be measured.

[0053] The diameter of the ball limiting hole 32-1 is 0.1 mm to 2.0 mm larger than the diameter of the ball 10. In this embodiment, the diameter of the ball limiting hole 32-1 is 1.0 mm larger than the diameter of the ball 10. The depth of the ball limiting hole 32-1 is 1.0 mm to 3.0 mm, and in this embodiment, it is 1.0 mm.

[0054] A guide seat 32-2 is provided on the upper side of the ball stop hole 32-1. The guide seat 32-2 is provided with a central through hole running through the upper and lower parts thereof. The diameter of the central through hole is the same as the diameter of the ball stop hole 32-1, and the central through hole is coaxially arranged with the ball stop hole 32-1. The guide seat 32-2 is 0.5 mm to 1.5 mm higher than the upper surface of the ball displacement turntable 32, and is 1.0 mm in this embodiment. The upper end of the inner hole wall of the guide seat 32-2 is provided with a rounded corner.

[0055] When the spherical surface unfolding device of the present invention is used, each spherical limiting hole 32-1 corresponds to a corresponding work station. Figure 5 The station where the ball 10 is located is the detection station, and the station where a corresponding ball stop hole 32-1 above the guide groove of the movable plate 11 is located is the discharge station, and the ball displacement turntable 32 rotates counterclockwise. The workers and the automatic ball 10 feeding device successively feed the balls 10 to be tested into the ball stop holes 32-1 before the detection station.

[0056] 1. Aim the microscope of the microscopic image detection device in the automated machine vision detection system at the detection station where the ball 10 to be detected is located; the ball displacement turntable 32 is driven by the rotary stepper motor 31 through the turntable mounting shaft 33 to rotate counterclockwise to send the ball 10 to be detected to the detection station. Then the ball displacement turntable 32 remains stationary.

[0057] 2. The X-axis driving assembly 21 and the Y-axis driving assembly 22 of the friction disc driving device 2 drive the friction disc 1 to move along the X-axis and the Y-axis in the horizontal plane. Due to the friction force, the sphere 10 rotates in the sphere limiting hole 32-1 of the sphere displacement turntable 32. As the friction disc 1 moves along the X-axis and the Y-axis, the sphere surface also unfolds along the X-axis and the Y-axis. The microscopic image detection device in the automated machine vision detection system photographs and detects the sphere 10.

[0058] The friction disc 1 moves in the following manner: when the stepper motor detects the sphere, the X-axis and the Y-axis move forward by a circumferential distance (set according to the diameter of the detected sphere), and then the X-axis and the Y-axis move reversely by a circumferential distance and return to the origin.

[0059] 3. After testing a ball 10, the friction disc 1 stops moving and remains stationary. The ball displacement turntable 32 is driven by the rotary stepping motor 31 through the turntable mounting shaft 33 to rotate counterclockwise by one station, and the next ball 10 to be tested is sent to the testing station for testing.

[0060] 4. When the first ball 10 that has been inspected is sent to the corresponding discharge station above the movable plate 11 by the ball displacement turntable 32, the corresponding cylinder drives the movable plate 11 to flip downward and open, and the ball 10 rolls along the guide groove 11-1 to the corresponding judgment module in the automated machine vision inspection system, and then the movable plate 11 returns to its original position to seal the discharge gap of the friction plate 1.

[0061] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spherical surface unfolding device, characterized in that: It includes a friction disc, a friction disc driving device, a ball tray assembly and a bottom plate; the ball tray assembly includes a ball displacement turntable, which is rotatably arranged above the friction disc; the ball displacement turntable is provided with a ball limiting hole running through it from top to bottom, and the aperture of the ball limiting hole corresponds to the diameter of the ball; the corresponding part of the middle part of the sphere is located in the ball limiting hole, and the corresponding part of the lower part of the sphere is in contact with the friction disc; the displacement turntable is used to change the displacement of the ball in the horizontal plane to change the working position, and the ball can rotate freely in the ball limiting hole; the friction disc driving device is arranged on the bottom plate, and the friction disc is driven by the friction disc driving device to move in the same horizontal plane; the friction disc makes the ball rotate freely in situ in the ball limiting hole through the friction force; the rear part of the friction disc is provided with a discharge notch running through it from top to bottom and opening backwards; a movable plate that can be opened and closed is provided in the discharge notch, and the left end of the movable plate is hingedly connected to the friction disc to seal the discharge notch of the friction disc, and the movable plate is driven by a cylinder to realize flipping and opening and closing; on the movable plate A material guide trough is provided; the ball tray assembly also includes a rotating stepper motor and a turntable mounting shaft; the motor shaft of the rotating stepper motor is arranged downward; the turntable mounting shaft is connected to the motor shaft of the rotating stepper motor through a coupling transmission; the ball displacement turntable is detachably and coaxially fixedly arranged on the lower end of the turntable mounting shaft; the ball displacement turntable is provided with a group of ball limiting holes running through it at equal intervals along its circumference; the ball center of the ball is located in the ball limiting hole; the friction disk is square, and the side length of the friction disk is greater than The diameter of the ball displacement turntable is the sum of twice the circumference of the ball to be measured; a guide seat is provided on the upper side of the ball limiting hole of the ball displacement turntable of the ball tray assembly, and the guide seat is provided with a central through hole running through it from top to bottom, the diameter of the central through hole is the same as the diameter of the ball limiting hole, and the central through hole and the ball limiting hole are coaxially arranged; a chamfer is provided on the upper end of the inner hole wall of the guide seat; the aperture of the ball limiting hole of the ball displacement turntable of the ball tray assembly is 0.1 mm to 2.0 mm larger than the diameter of the ball; The depth of the ball limiting hole is 1.0 mm to 3.0 mm; the guide seat is 0.5 mm to 1.5 mm higher than the upper surface of the ball displacement turntable.

2. The spherical surface unfolding device according to claim 1, characterized in that: The surface of the friction disc is made of polyurethane material.

3. The spherical surface unfolding device according to any one of claims 1 to 2, characterized in that: The friction disc driving device includes an X-axis driving assembly and a Y-axis driving assembly; the X-axis driving assembly is arranged on the bottom plate, and the Y-axis driving assembly is arranged on the X-axis moving seat of the X-axis assembly, and the X-axis driving assembly and the Y-axis driving assembly realize the movement of the friction disc along the X-axis and Y-axis in the same horizontal plane.

4. The spherical surface unfolding device according to claim 3, characterized in that: The X-axis drive assembly also includes an X-axis stepper motor, an X-axis lead screw, an X-axis ball screw nut, an X-axis lead screw nut seat and an X-axis linear sliding unit; the X-axis stepper motor is fixed on the rear right side of the base plate by its motor housing through the corresponding X-axis motor mounting seat, and its motor shaft extends to the left; the X-axis lead screw is arranged on the rear part of the base plate to rotate left and right through the corresponding lead screw bearing seat; the right end of the X-axis lead screw is connected to the motor shaft of the X-axis stepper motor through a coupling; the X-axis ball screw nut is arranged on the X-axis lead screw; The screw nut seat is fixedly arranged on the X-axis ball screw nut; there are two groups of X-axis linear sliding units, and the two groups of X-axis linear sliding units both adopt SBR circular guide rails; the two groups of X-axis linear sliding units are arranged parallel to each other from front to back on the bottom plate; the base of the X-axis linear sliding unit is fixedly arranged on the bottom plate; the X-axis moving seat is fixedly arranged on the sliders of the two groups of X-axis linear sliding units; the X-axis moving seat is fixedly connected to the X-axis screw nut seat, so that the X-axis moving seat is driven by the X-axis stepper motor to move left and right along the X-axis linear sliding unit.

5. The spherical surface unfolding device according to claim 3, characterized in that: The Y-axis driving assembly includes a Y-axis stepper motor, a Y-axis lead screw, a Y-axis ball screw nut, a Y-axis lead screw nut seat, a Y-axis moving seat, a Y-axis linear sliding unit and a Y-axis mounting plate; the Y-axis mounting plate is fixedly arranged on the upper side of the X-axis moving seat of the X-axis driving assembly; the Y-axis stepper motor is fixedly arranged on the rear right side of the Y-axis mounting plate by its motor housing through the corresponding Y-axis motor mounting seat, and its motor shaft extends forward; the Y-axis lead screw is arranged on the left part of the Y-axis mounting plate in a forward and backward rotation through the corresponding lead screw bearing seat; the rear end of the Y-axis lead screw is connected to the motor shaft of the Y-axis stepper motor through a coupling; the Y-axis ball screw nut is arranged The Y-axis linear sliding unit is placed on the Y-axis screw; the Y-axis screw nut seat is fixedly set on the Y-axis ball screw nut; there are 2 groups of Y-axis linear sliding units, and the 2 groups of Y-axis linear sliding units both adopt SBR circular guide rails; the 2 groups of Y-axis linear sliding units are arranged parallel to each other from left to right on the Y-axis mounting plate; the base of the Y-axis linear sliding unit is fixedly set on the X-axis moving seat; the Y-axis moving seat is fixedly set on the sliders of the 2 groups of Y-axis linear sliding units; the Y-axis moving seat is fixedly connected with the Y-axis screw nut seat, so that the Y-axis moving seat is driven by the Y-axis stepping motor to move forward and backward along the Y-axis linear sliding unit; the friction disk is fixedly set on the upper side of the Y-axis moving seat.

Images