Visual sliding correction device for mounting head of chip mounter

Abstract

The utility model discloses a visual sliding correction device for a mounting head of a chip mounter, which comprises a mounting head assembly, a moving assembly is arranged on the back of the mounting head assembly, a sliding camera is arranged at the lower end of the moving assembly, and the moving assembly adopts lead screw transmission. And the screw rod is not easy to elastically deform during high-speed operation, so that the position precision of the line scanning camera is powerfully guaranteed, and the jelly effect during camera imaging is avoided.

Description

Technical Field

[0001] This utility model relates to the field of chip mounter technology, and in particular to a visual sliding correction device for the mounter head of a chip mounter. Background Technology

[0002] Before placing components, the placement head of a pick-and-place machine needs to visually correct the position and angle of the components picked up by the placement head. To improve efficiency, the placement head is usually equipped with multiple nozzles, but to save costs, only a single line scan camera is used. In order to use a single line scan camera to visually correct the components on multiple nozzles, the line scan camera is usually placed below the nozzles and can slide back and forth along the direction of the nozzle arrangement. Before the nozzles pick up the components, the line scan camera is moved to one side to make room for the nozzles to press down and pick up the components. After all the nozzles have finished picking up the components, the nozzles move upwards to above the line scan camera and are just above the focal plane of the line scan camera. At this time, the line scan camera is controlled to move from one side to the other side at a constant speed. The line scan camera scans the nozzles synchronously as the position changes, and finally obtains an image containing information about all the components. The position and angle of the components in the image are identified and compared with the ideal position and angle to obtain the component picking deviation. The deviation is then compensated for during subsequent placement to achieve correction.

[0003] For example, patent number 202211616841.6, titled "Pick-and-place machine and its head," discloses a pick-and-place machine head comprising a frame, at least two linear motors, at least two lifting components, and at least two rotary drivers. The linear motors are connected to the frame, and each lifting component is correspondingly and floatingly connected to the output of a linear motor. The linear motors drive the lifting components to move, and the end of the lifting component furthest from the linear motor is used to pick up surface-mount components. Each rotary driver is linked to a lifting component to drive the lifting component to rotate, achieving alignment between the surface-mount components and the circuit board. In this pick-and-place machine, the linear motors not only improve the accuracy of surface-mount component movement but also eliminate the need for intermediate transmission mechanisms, improving the machine's structural compactness. The floating connection of the lifting components to the linear motor outputs provides floating space at the connection point, preventing the lifting components from getting stuck or tilted during lifting, thus reducing the accuracy of picking up and placing surface-mount components.

[0004] However, in the aforementioned patents and existing technologies, since high-speed pick-and-place machines aim to deliver materials to the placement position as soon as possible after picking them up, the requirements for calibration speed are relatively high. Traditional pick-and-place machine head vision sliding devices generally use synchronous belt drives. The disadvantage of this is that the synchronous belt is prone to elastic deformation when running at high speed, which causes fluctuations in the position of the line scan camera. The camera image is prone to jelly effect distortion, which reduces the accuracy of component position and angle recognition, and thus affects the calibration accuracy. Utility Model Content

[0005] In view of this, the present invention proposes a visual sliding correction device for the placement head of a chip mounter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A visual sliding correction device for a chip mounter head includes a mounter assembly, a moving component is provided on the back of the mounter assembly, a sliding camera is provided at the lower end of the moving component, and the moving component is driven by a lead screw.

[0008] As a further improvement to the above technical solution:

[0009] Preferably, the moving component includes a sliding component disposed on the back of the head assembly and a lead screw drive component connected to the sliding component, and a sliding camera is disposed at the lower end of the sliding component.

[0010] Preferably, the sliding assembly includes two linear slide rails horizontally disposed on the back of the head assembly, a slider slidably disposed on the linear slide rails, and a nut seat disposed on the two sliders, with a sliding camera fixedly disposed at the lower end of the nut seat.

[0011] Preferably, the lead screw drive assembly includes a drive lead screw rotatably mounted on the head assembly and a sliding motor fixedly mounted on the head assembly. The sliding motor and the drive lead screw are mutually transmitted through a set of meshing helical gears, and the drive lead screw is threadedly connected inside the sliding assembly.

[0012] Preferably, the left and right ends of the drive screw are sleeved in the screw bearing, the screw bearing is fixedly mounted on the connecting plate, the connecting plate is fixedly mounted on the head assembly, and one end of the screw bearing passes through the connecting plate and is fixedly connected to one of the helical gears in the helical gear set.

[0013] Preferably, the sliding motor and the drive screw are both located between two connecting plates.

[0014] Compared with existing technologies, the beneficial effects of this utility model are:

[0015] Because the camera is driven by a lead screw with good rigidity, the lead screw is not prone to elastic deformation when running at high speed, thus effectively ensuring the positional accuracy of the line scan camera and avoiding the rolling shutter effect when the camera is imaging.

[0016] The drive screw and the sliding motor are connected by a helical gear set. The overall structure is compact and does not take up too much extra space. The transmission process is smooth and is not prone to backlash or vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall reverse three-dimensional structure of this utility model;

[0019] Figure 3 for Figure 2 A magnified structural diagram of area A in the middle.

[0020] In the diagram: 1. Head assembly; 2. Moving assembly; 21. Linear guide rail; 22. Slider; 23. Nut seat; 24. Connecting plate; 25. Lead screw bearing; 26. Drive lead screw; 27. Sliding motor; 28. Helical gear set; 3. Sliding camera. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] As attached Figure 1 As shown, the main body of this technical solution is the bonding head assembly 1. The bonding head assembly 1 is the same as the prior art, mainly consisting of a frame, a linear motor, a lifting assembly, a rotary driver, a detection plate, and a bonding head.

[0025] The main improvement in this technical solution is the improvement of the moving component 2, primarily for photographing the components on the mounting head, thereby enabling component calibration, as shown in the attached diagram. Figure 2 With appendix Figure 3 As shown, the specific structure is as follows:

[0026] Power section: Two connecting plates 24 located on the same horizontal plane are installed on the back of the frame. A lead screw bearing 25 is fixedly installed on the connecting plate 24. A drive lead screw 26 is sleeved inside the lead screw bearing 25. One end of the drive lead screw 26 passes through the connecting plate 24. A sliding motor 27 is fixedly installed above the connecting plate 24. The sliding motor 27 and the drive lead screw 26 are connected by a helical gear set 28, which makes the overall structure compact, does not occupy too much extra space, and the transmission motion is smooth, and it is not easy to produce backlash and vibration. Of course, if the sliding motor 27 and the drive lead screw 26 are arranged in a straight line and connected by a connecting sleeve, it should also be within the scope of protection of this application.

[0027] Moving part: Two horizontally parallel linear slide rails 21 are installed on the back of the frame. Slider 22 is slidably connected to the linear slide rails 21. Nut seats 23 are fixedly installed on the two sliders 22. A drive screw 26 is threaded through the nut seat 23. Therefore, the nut seat 23 should be located between the two connecting plates 24. A sliding camera 3 is installed at the lower end of the nut seat 23. The front end of the sliding camera 3 should be located at the lower end of the attachment head. Thus, during the lifting and adsorption process, the sliding camera 3 is located at the sidemost side, so it will not affect the lifting and adsorption. After adsorption is completed, it can be moved and shot.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A visual sliding correction device for a pick-and-place machine head, comprising a head assembly (1), characterized in that: The back of the head assembly (1) is provided with a moving assembly (2), and a sliding camera (3) is provided at the lower end of the moving assembly (2). The moving assembly (2) is driven by a lead screw.

2. The visual sliding correction device for the placement head of a chip mounter according to claim 1, characterized in that: The moving component (2) includes a sliding component disposed on the back of the head assembly (1) and a lead screw drive component connected to the sliding component. A sliding camera (3) is disposed at the lower end of the sliding component.

3. The visual sliding correction device for the placement head of a chip mounter according to claim 2, characterized in that: The sliding assembly includes two linear slide rails (21) horizontally arranged on the back of the head assembly (1), a slider (22) slidably arranged on the linear slide rails (21), and a nut seat (23) arranged on the two sliders (22). A sliding camera (3) is fixedly arranged at the lower end of the nut seat (23).

4. The visual sliding correction device for the placement head of a chip mounter according to claim 2, characterized in that: The lead screw drive assembly includes a drive screw (26) rotatably mounted on the head assembly (1) and a sliding motor (27) fixedly mounted on the head assembly (1). The sliding motor (27) and the drive screw (26) are mutually driven by a helical gear set (28) that meshes with each other. The drive screw (26) is threadedly connected to the sliding assembly.

5. The visual sliding correction device for the placement head of a chip mounter according to claim 4, characterized in that: The drive screw (26) is sleeved in the screw bearing (25) at both ends. The screw bearing (25) is fixedly mounted on the connecting plate (24). The connecting plate (24) is fixedly mounted on the head assembly (1). One end of the screw bearing (25) passes through the connecting plate (24) and is fixedly connected to one of the helical gears in the helical gear set (28).

6. The visual sliding correction device for the placement head of a chip mounter according to claim 5, characterized in that: The sliding motor (27) and the drive screw (26) are both located between the two connecting plates (24).

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