A glue dispensing calibration mechanism and calibration method used in glue dispensing equipment

Abstract

The present invention discloses a dispensing calibration mechanism and a calibration method thereof used in a dispensing device. The dispensing calibration mechanism includes a dispensing part and a calibration part arranged below the dispensing part and used to carry a product. The dispensing part is installed on an X-axis driving mechanism, and the calibration part is installed on a Y-axis driving mechanism. The dispensing calibration mechanism of the present invention obtains XY values ​​to determine coordinates by adjusting a calibration plate in a calibration CCD camera so that a mark is located at the center of a field of view, moving a dispensing alignment CCD camera and a moving calibration CCD camera, so as to know the positional relationship between the dispensing alignment CCD camera and the calibration CCD camera. Then, the calibration CCD camera and the needle nozzle are moved to know the positional relationship between the calibration CCD camera and the needle nozzle. The positional relationship between the dispensing alignment CCD camera and the needle nozzle is known by referring to the positional relationship between the dispensing alignment CCD camera and the calibration CCD camera. The dispensing calibration mechanism of the present invention has a simple structure and accurate calibration, and has high calibration efficiency to improve the dispensing efficiency.

Description

Technical Field

[0001] The invention relates to a glue dispensing mechanism for LCD and LED screens, and in particular to a glue dispensing calibration mechanism and a calibration method thereof applied to glue dispensing equipment. Background Art

[0002] In the whole process of dispensing, the dispensing calibration position is particularly important. However, the dispensing calibration position used in the market has the disadvantage of low dispensing accuracy, resulting in low product yield and increased production costs.

[0003] In view of the above technical problems, it is necessary to improve the traditional dispensing equipment. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a glue dispensing calibration mechanism and a calibration method thereof applied to a glue dispensing device. The purpose of designing the glue dispensing calibration mechanism is to improve the glue dispensing accuracy and improve the glue dispensing efficiency.

[0005] In order to solve the above technical problems, the present invention is implemented by the following scheme: A dispensing calibration mechanism and a calibration method thereof applied to a dispensing device of the present invention, the dispensing calibration mechanism comprises a dispensing part and a calibration part arranged below the dispensing part and used to carry the product, the dispensing part is installed on the X-axis driving mechanism, the calibration part is installed on the Y-axis driving mechanism, and the dispensing part comprises:

[0006] A lifting power unit is installed on a vertical plate, and the vertical plate is fixed to the X-axis movable part of the X-axis driving mechanism;

[0007] A movable component is connected to the lifting power unit and driven by the lifting power unit to move in the Z-axis direction;

[0008] A glue dispensing alignment CCD camera is installed on one side of the front side of the movable component, and moves along the Z axis with the movable component. The camera direction of the glue dispensing alignment CCD camera faces downward;

[0009] A rangefinder is installed on the front side of the movable assembly and close to one side of the dispensing alignment CCD camera;

[0010] A glue dispensing device, installed on the front side of the movable assembly and close to the other side of the glue dispensing alignment CCD camera;

[0011] The calibration unit comprises:

[0012] A mounting plate mounted on the Y-axis movable portion of the Y-axis driving mechanism;

[0013] A calibration CCD camera is mounted on the mounting plate, and the camera direction of the calibration CCD camera faces upward;

[0014] A calibration plate, fixed to the upper end of the mounting plate through a mounting seat;

[0015] The tool setting instrument is fixed to the side of the mounting plate through an adjustable connecting plate, and is arranged upward. The glue dispensing device stops after descending and touching the tool setting instrument.

[0016] Furthermore, the vertical plate has a double-row Z-direction slide rail, and the movable assembly is slidably connected to the double-row Z-direction slide rail through a slider;

[0017] The power source of the lifting power unit is a Z-axis motor, a driving end of the Z-axis motor is connected with a screw rod downward, a nut is threadedly connected to the screw rod, and the nut is fixed on a nut seat, and the nut seat is connected to the movable component.

[0018] Furthermore, the movable component includes a dispensing head fixing plate, two connecting blocks installed in the Z-axis direction on the front side of the dispensing head fixing plate, and a connecting plate fixed on the two connecting blocks. The dispensing head fixing plate and the nut seat are connected and fixed and slidably connected to the double-row Z-axis slide rail through the slider. The rangefinder, the dispensing alignment CCD camera and the dispensing device are installed on the front side of the connecting plate in a left-center-right arrangement.

[0019] Furthermore, the glue dispensing device includes a glue dispensing cylinder and a needle nozzle connected to the glue outlet of the glue dispensing cylinder, and the needle nozzle stops after descending and touching the tool setting instrument.

[0020] The present invention provides a calibration method for a glue dispensing calibration mechanism used in a glue dispensing device, the calibration method comprising the following steps:

[0021] Step 1: XY calibration of the needle nozzle: The Z-axis motor drives the connecting screw, the screw rotates to drive the nut seat to descend, and the nut seat is connected to the dispensing head fixing plate. As the Z-axis motor drives, the components installed on the dispensing head fixing plate descend accordingly.

[0022] Step 2: The glue dispensing alignment CCD camera is fixed on the lens barrel, and the lens barrel is fixed on the connecting plate by the lens barrel fixing seat and the lens barrel clamping block, and the connecting plate is connected to the glue dispensing head fixing plate by two connecting blocks.

[0023] Step 3: The dispensing alignment CCD camera descends along with the dispensing head fixing plate, reducing the distance between the lens barrel and the calibration plate to the lens barrel object distance.

[0024] Step 4: The dispensing alignment CCD camera moves in the X direction through the X-axis driving mechanism, and the position of the dispensing alignment CCD camera is adjusted so that the marking point of the calibration plate is located at the center of the field of view of the dispensing alignment CCD camera.

[0025] Step 5: The dispensing device moves in the X direction through the X-axis drive mechanism, and the calibration CCD camera moves in the Y direction through the Y-axis drive mechanism, so that the mark point on the calibration plate is located at the center of the dispensing alignment CCD camera. The size of the XY value of the movement is the position relationship between the two CCDs.

[0026] Step 6. After the system retrieves the positional relationship between the dispensing alignment CCD camera and the calibration CCD camera, the dispensing device moves in the X direction again, and the calibration CCD camera moves in the Y direction again, so that the outlet line of the needle nozzle is in the center of the field of view of the calibration CCD camera. Based on the positional relationship between the dispensing alignment CCD camera and the calibration CCD camera, the positional relationship between the dispensing alignment CCD camera and the needle nozzle is obtained.

[0027] Z-direction calibration of the needle nozzle:

[0028] Step 1: The Z-axis motor drives the lead screw, which rotates to drive the nut seat to descend. The nut seat is connected to the dispensing head fixing plate. As the Z-axis motor is driven, the components installed on the dispensing head fixing plate descend accordingly.

[0029] Step 2: The needle nozzle stops after touching the tool setting instrument, and the height of the needle nozzle from the zero height to the sensor is obtained.

[0030] Step 3: Move the cursor of the rangefinder to the center of the height sensor to measure the height, obtain the Z-direction relationship between the needle nozzle and the rangefinder, and complete the Z-direction calibration of the needle nozzle.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: the dispensing calibration mechanism of the present invention obtains XY values ​​to determine the coordinates by adjusting the calibration plate in the calibration CCD camera so that the mark is located at the center of the field of view, moving the dispensing alignment CCD camera and moving the calibration CCD camera to obtain the coordinates, so as to know the positional relationship between the dispensing alignment CCD camera and the calibration CCD camera. Then the calibration CCD camera and the needle nozzle are moved to know the positional relationship between the calibration CCD camera and the needle nozzle. The positional relationship between the dispensing alignment CCD camera and the needle nozzle is known by referring to the positional relationship between the dispensing alignment CCD camera and the calibration CCD camera.

[0032] The glue dispensing calibration mechanism of the present invention has a simple structure and accurate calibration, and has high calibration efficiency to improve the glue dispensing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the glue dispensing part of the present invention.

[0034] Figure 2 It is a schematic diagram of the structure of the calibration part of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Embodiment 1: The specific structure of the present invention is as follows:

[0040] Please refer to the attached Figure 1-2 The present invention provides a dispensing calibration mechanism and a calibration method thereof for use in a dispensing device. The dispensing calibration mechanism includes a dispensing unit 100 and a calibration unit 200 disposed below the dispensing unit 100 and used to carry a product. The dispensing unit 100 is mounted on an X-axis driving mechanism, and the calibration unit 200 is mounted on a Y-axis driving mechanism. The dispensing unit 100 includes:

[0041] A lifting power unit is installed on a vertical plate, and the vertical plate is fixed to the X-axis movable part of the X-axis driving mechanism;

[0042] A movable component is connected to the lifting power unit and driven by the lifting power unit to move in the Z-axis direction;

[0043] The glue dispensing alignment CCD camera 19 is installed on the front side of the movable component, and moves along the Z axis with the movable component. The camera direction of the glue dispensing alignment CCD camera 19 faces downward;

[0044] The rangefinder 23 is installed on the front side of the movable assembly and close to one side of the dispensing alignment CCD camera 19;

[0045] A glue dispensing device, installed on the front side of the movable assembly and close to the other side of the glue dispensing alignment CCD camera 19;

[0046] The calibration unit 200 includes:

[0047] A mounting plate mounted on the Y-axis movable portion of the Y-axis driving mechanism;

[0048] A calibration CCD camera 18 is mounted on the mounting plate, and the camera direction of the calibration CCD camera 18 faces upward;

[0049] The calibration plate 12 is fixed to the upper end of the mounting plate through a mounting seat;

[0050] The tool setting instrument 11 is fixed to the side of the mounting plate through an adjustable connecting plate, and is arranged upward. The glue dispensing device stops after descending and touching the tool setting instrument 11.

[0051] A preferred technical solution of this embodiment: the vertical plate has a double-row Z-direction slide rail, and the movable component is slidably connected to the double-row Z-direction slide rail through a slider;

[0052] The power source of the lifting power unit is a Z-axis motor 1, and the driving end of the Z-axis motor 1 is connected to a screw rod 2 downward. The screw rod 2 is threaded with a nut, and the nut is fixed on a nut seat 3. The nut seat 3 is connected to the movable component.

[0053] A preferred technical solution of this embodiment: the movable component includes a dispensing head fixing plate 4, two connecting blocks 5 installed in the Z-axis direction on the front side of the dispensing head fixing plate 4, and a connecting plate 6 fixed on the two connecting blocks 5. The dispensing head fixing plate 4 and the nut seat 3 are connected and fixed and slidably connected to the double-row Z-direction slide rail through the slider. The rangefinder 23, the dispensing alignment CCD camera 19 and the dispensing device are arranged on the left, middle and right sides and are installed on the front side of the connecting plate 6.

[0054] A preferred technical solution of this embodiment: the glue dispensing device includes a glue dispensing cylinder 7 and a needle nozzle 10 connected to the glue outlet of the glue dispensing cylinder 7, and the needle nozzle 10 stops after descending and touching the tool setting instrument 11.

[0055] Embodiment 2:

[0056] The following is the working principle of the dispensing calibration mechanism of the present invention:

[0057] Step 1, needle nozzle XY calibration: the Z-axis motor 1 drives the connecting screw 2, the screw 2 rotates to drive the nut seat 3 to descend, the nut seat 3 is connected to the dispensing head fixing plate 4, and as the Z-axis motor 1 is driven, the components installed on the dispensing head fixing plate 4 descend accordingly.

[0058] Step 2: The dispensing alignment CCD camera 19 is fixed on the lens barrel, and the lens barrel is fixed on the connecting plate 6 by the lens barrel fixing seat and the lens barrel clamping block, and the connecting plate 6 is connected to the dispensing head fixing plate 4 by two connecting blocks 5.

[0059] Step three, the dispensing alignment CCD camera 19 is lowered along with the dispensing head fixing plate 4, and the distance between the lens barrel and the calibration plate 12 is reduced to the lens barrel object distance.

[0060] Step 4: The dispensing alignment CCD camera 19 is moved in the X direction through the X-axis driving mechanism, and the position of the dispensing alignment CCD camera 19 is adjusted so that the marking point of the calibration plate 12 is located at the center of the field of view of the dispensing alignment CCD camera 19.

[0061] Step 5: The dispensing device moves in the X direction through the X-axis drive mechanism, and the calibration CCD camera 18 moves in the Y direction through the Y-axis drive mechanism, so that the marking point of the calibration plate 12 is located at the center of the dispensing alignment CCD camera 19. The size of the moving XY value is the position relationship between the two CCDs.

[0062] Step six, after the system retrieves the positional relationship between the dispensing alignment CCD camera 19 and the calibration CCD camera 18, the dispensing device moves in the X direction again, and the calibration CCD camera 18 moves in the Y direction again, so that the outlet line of the needle nozzle 10 is at the center of the field of view of the calibration CCD camera 18. Based on the positional relationship between the dispensing alignment CCD camera 19 and the calibration CCD camera 18, the positional relationship between the dispensing alignment CCD camera 19 and the needle nozzle 10 is obtained.

[0063] Z-direction calibration of the needle nozzle 10:

[0064] Step 1: The Z-axis motor 1 drives the screw rod 2, and the screw rod 2 rotates to drive the nut seat 3 to descend. The nut seat 3 is connected to the dispensing head fixing plate 4. As the Z-axis motor 1 is driven, the components installed on the dispensing head fixing plate 4 descend accordingly.

[0065] Step 2: The needle nozzle 10 stops after touching the tool setting instrument 11, and the height of the needle nozzle 10 from the zero height to the sensor is obtained.

[0066] Step 3: Move the cursor of the rangefinder 23 to the center of the height sensor to measure the height, obtain the Z-direction relationship between the needle nozzle 10 and the rangefinder 23 , and complete the Z-direction calibration of the needle nozzle 10 .

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A glue dispensing calibration mechanism used in a glue dispensing device, the glue dispensing calibration mechanism comprising a glue dispensing unit (100) and a calibration unit (200) arranged below the glue dispensing unit (100) and used to carry a product, the glue dispensing unit (100) being mounted on an X-axis driving mechanism, and the calibration unit (200) being mounted on a Y-axis driving mechanism, characterized in that: The glue dispensing unit (100) comprises: A lifting power unit is mounted on a vertical plate, and the vertical plate is fixed to the X-axis movable part of the X-axis driving mechanism; A movable component is connected to the lifting power unit and driven by the lifting power unit to move in the Z-axis direction; A glue dispensing alignment CCD camera (19) is installed on one side of the front side of the movable component and moves along the Z-axis with the movable component. The shooting direction of the glue dispensing alignment CCD camera (19) faces downwards; A rangefinder (23) is mounted on the front side of the movable assembly and close to one side of the dispensing alignment CCD camera (19); A glue dispensing device, installed on the front side of the movable component and close to the other side of the glue dispensing alignment CCD camera (19); The calibration unit (200) comprises: A mounting plate mounted on the Y-axis movable portion of the Y-axis driving mechanism; a calibration CCD camera (18) mounted on the mounting plate, the calibration CCD camera (18) having an imaging direction facing upwards; A calibration plate (12) is fixed to the upper end of the mounting plate via a mounting seat; The tool setting instrument (11) is fixed to the side of the mounting plate via an adjustable connecting plate and is arranged upwards. The glue dispensing device stops after descending and touching the tool setting instrument (11).

2. The glue dispensing calibration mechanism used in glue dispensing equipment according to claim 1, characterized in that: The vertical plate has a double-row Z-direction slide rail, and the movable assembly is slidably connected to the double-row Z-direction slide rail through a slider; The power source of the lifting power unit is a Z-axis motor (1), the driving end of the Z-axis motor (1) is connected to a screw rod (2) facing downward, the screw rod (2) is threaded with a nut, the nut is fixed on a nut seat (3), and the nut seat (3) is connected to the movable component.

3. The glue dispensing calibration mechanism used in glue dispensing equipment according to claim 2, characterized in that: The movable component comprises a dispensing head fixing plate (4), two connecting blocks (5) mounted on the front side of the dispensing head fixing plate (4) in the Z-axis direction, and a connecting plate (6) fixed on the two connecting blocks (5); the dispensing head fixing plate (4) and the nut seat (3) are connected and fixed and slidably connected to the double-row Z-axis slide rail through the slider; the rangefinder (23), the dispensing alignment CCD camera (19) and the dispensing device are arranged on the front side of the connecting plate (6) in a left-middle-right arrangement.

4. A glue dispensing calibration mechanism used in a glue dispensing device according to claim 1 or 3, characterized in that: The glue dispensing device comprises a glue dispensing cylinder (7) and a needle nozzle (10) connected to a glue outlet of the glue dispensing cylinder (7), and the needle nozzle (10) stops after descending and touching the tool setting instrument (11).

5. The calibration method of the dispensing calibration mechanism according to any one of claims 1 to 4, characterized in that: The calibration method includes the following steps: Step 1: XY-axis calibration of the needle nozzle: the Z-axis motor (1) drives the connecting screw (2), the screw (2) rotates to drive the nut seat (3) to descend, and the nut seat (3) is connected to the dispensing head fixing plate (4). As the Z-axis motor (1) is driven, the components installed on the dispensing head fixing plate (4) are lowered accordingly; Step 2: The dispensing alignment CCD camera (19) is fixed on the lens barrel, the lens barrel is fixed on the connecting plate (6) by the lens barrel fixing seat and the lens barrel clamping block, and the connecting plate (6) is connected to the dispensing head fixing plate (4) by two connecting blocks (5); Step 3, the dispensing alignment CCD camera (19) is lowered along with the dispensing head fixing plate (4), and the distance between the lens barrel and the calibration plate (12) is reduced to the lens barrel object distance; Step 4: the dispensing alignment CCD camera (19) is moved in the X direction by the X-axis driving mechanism, and the position of the dispensing alignment CCD camera (19) is adjusted so that the marking point of the calibration plate (12) is located at the center of the field of view of the dispensing alignment CCD camera (19); Step 5: The dispensing device moves in the X direction through the X-axis driving mechanism, and the calibration CCD camera (18) moves in the Y direction through the Y-axis driving mechanism, so that the marking point of the calibration plate (12) is located at the center of the dispensing alignment CCD camera (19). The size of the XY value of the movement is the positional relationship between the two CCDs; Step 6, after the system retrieves the positional relationship between the dispensing alignment CCD camera (19) and the calibration CCD camera (18), the dispensing device moves in the X direction again, and the calibration CCD camera (18) moves in the Y direction again, so that the outlet of the needle nozzle (10) is at the center of the field of view of the calibration CCD camera (18), and the positional relationship between the dispensing alignment CCD camera (19) and the calibration CCD camera (18) is obtained; Z-direction calibration of the needle nozzle (10): Step 1: The Z-axis motor (1) drives the screw rod (2), and the screw rod (2) rotates to drive the nut seat (3) to descend, and the nut seat (3) is connected to the dispensing head fixing plate (4). As the Z-axis motor (1) is driven, the components installed on the dispensing head fixing plate (4) are lowered accordingly; Step 2, the needle mouth (10) stops after touching the tool setting instrument (11), and the height of the needle mouth (10) from the zero height to the sensor is obtained; Step 3: Move the cursor of the distance meter (23) to the center of the height sensor to measure the height, obtain the Z-direction relationship between the needle mouth (10) and the distance meter (23), and complete the Z-direction calibration of the needle mouth (10).

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