Wire bonding machine vision device and wire bonding machine

Abstract

This invention relates to wire bonding machines, and provides a vision device for the wire bonding machine and the wire bonding machine itself. The vision device includes a lens, a light source, and a base. Both the lens and the light source are mounted on the base. The base includes a base plate and a first triangular plate. The first triangular plate extends outward from one side of the base plate. The main body of the lens is mounted on the base plate via a mounting bracket, and another part of the lens extends to and is fixed to the first triangular plate. The light source is also fixedly connected to the first triangular plate. In this invention, a first triangular plate is added to one side of the base plate, providing support and fixation for the lens. This increases the strength of the base and provides multi-point support and fixation for the lens, solving the image shaking problem during wire bonding machine operation and ensuring the positioning accuracy and judgment accuracy of the vision device.

Description

Technical Field

[0001] This invention relates to wire bonding machines, and more particularly to a vision device for a wire bonding machine and a wire bonding machine. Background Technology

[0002] Machine vision systems can quickly acquire large amounts of information and are widely used in automated production, finished product inspection, and quality control in the semiconductor and electronics industries. In the semiconductor and electronics industry, especially in LED production, it is necessary to connect the electrodes on the chip to the electrodes on the substrate using thin metal wires. Machine vision is required for positioning and recognition during the connection process. Because the metal wires and solder joints are very small, a high-magnification optical system is needed, and wire bonding machine lenses are one such example.

[0003] Because wire bonder lenses have a high magnification, they experience significant vibration during operation, which can easily cause image shake, requiring a highly rigid structure. Additionally, the heat generated by the light source can create a "heat haze" phenomenon, where the light source heats the air, causing uneven air distribution and resulting in image drift. Summary of the Invention

[0004] The purpose of this invention is to provide a vision device for a wire bonding machine and a wire bonding machine, which are intended to solve the problems of existing wire bonding machines.

[0005] This invention is implemented as follows:

[0006] This invention provides a vision device for a wire bonding machine, including a lens, a light source, and a base. The lens and the light source are both mounted on the base. The base includes a base plate and a first triangular plate. The first triangular plate is formed by extending outward from one side of the base plate. The main body of the lens is mounted on the base plate via a mounting bracket, and another part of the lens extends to the first triangular plate and is fixedly connected to it. The light source is fixedly connected to the first triangular plate.

[0007] Furthermore, at least two mounting brackets are provided on the base plate, and each mounting bracket is arranged sequentially at intervals along the extension direction of the lens, and each mounting bracket together supports the lens.

[0008] Furthermore, each of the mounting brackets includes two second triangular plates and a mounting base disposed between the two second triangular plates. The two second triangular plates are arranged in parallel and spaced apart, and one side of each is vertically mounted on the base plate. The apex of the two second triangular plates away from the base plate jointly supports the lens. The mounting base is connected and fixed to the lens.

[0009] Furthermore, latches are provided on both the base plate and the first triangular plate, and the latches press down on the outer surface of the lens.

[0010] Furthermore, the lens has at least one upwardly projecting flange that extends along the length of the lens.

[0011] Furthermore, the cross-section of the flange in the vertical length direction is semi-circular.

[0012] Furthermore, the light source is semi-circular and is positioned around the light inlet of the lens.

[0013] Furthermore, there is a gap between the inner annular surface of the light source and the lens.

[0014] This invention also provides a wire bonding machine, including a welding head and the aforementioned vision device, both of which are mounted on a frame.

[0015] The present invention has the following beneficial effects:

[0016] The vision device of this invention is mainly used in wire bonding machines to provide visual positioning during operation. The lens of the vision device is mounted on a base, and the base has a first triangular plate on one side of the base plate. The side of the lens corresponding to the light inlet is mounted on the first triangular plate. Since the first triangular plate has a triangular structure, it can enhance the strength of the base, thereby solving the problem of image shaking during the operation of the wire bonding machine, and improving positioning accuracy and judgment accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the wire bonding machine vision device provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the light source structure of the vision device for a wire bonding machine. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] See Figure 1This invention provides a vision device for a wire bonding machine, mainly used to provide visual positioning for the wire bonding machine. Specifically, it includes a lens 1, a light source 2, and a base 3. The base 3 serves as the foundation of the vision device, with both the lens 1 and the light source 2 mounted on it. The vision device is mounted on the main structure of the wire bonding machine via the base 3. The lens 1 is used to capture image information, and position information can be calculated based on the image information. The light source 2 illuminates the lens 1 so that it can acquire clear image information. The base 3 comprises a base plate 31 and a first triangular plate 32. The first triangular plate 32 is located on one side of the base plate 31, extending outward from one side of the base plate 31. Alternatively, the two can be integrally formed. Typically, the base plate 31 is square, while the first triangular plate 32 is triangular, sharing a common edge. The main body of lens 1 is mounted on base plate 31 via mounting bracket 4, and another part of the structure extends to and is fixed to first triangular plate 32. The light source 2 is also fixed to first triangular plate 32. That is, the light outlet side of lens 1 is located at first triangular plate 32, and the light outlet side is located on base plate 31. In this invention, a first triangular plate 32 is added to one side of the traditional base plate 31 structure, and one end of lens 1 is supported and fixed to the first triangular plate 32. The triangular structure of the first triangular plate 32 enhances the overall structural strength of base 3, while ensuring the stability of the lens 1 support structure. This reduces the possibility of lens 1 shaking during the movement of the wire bonding machine, ensuring the positioning accuracy and judgment accuracy of the vision device.

[0022] In a preferred embodiment, at least two mounting brackets 4 are provided on the base plate 31. The mounting brackets 4 are arranged sequentially at intervals along the extension direction of the lens 1, and the mounting brackets 4 together support the lens 1. In this embodiment, the base plate 31 supports and fixes the main body of the lens 1 through multiple mounting brackets 4. When there are two mounting brackets 4, one mounting bracket 4 is located on the edge of the base plate 31 near the first triangular plate 32, while the other mounting bracket 4 is located on the edge of the base plate 31 away from the first triangular plate 32. In addition, since the main body of the lens 1 is also installed on the first triangular plate 32 away from the base plate 31, it can be ensured that the base 3 has at least three mounting support points for the lens 1, which can further ensure the installation stability of the lens 1.

[0023] The structure of the mounting bracket 4 is refined, comprising two second triangular plates 41 and a mounting base 42 disposed between the two second triangular plates 41. The two second triangular plates 41 are arranged parallel to each other and are both vertically mounted on the base plate 31. The apex of the second triangular plates 41 is not a sharp corner, but rather a supporting edge adapted to the lens 1. Thus, each mounting bracket 4 supports the lens 1 through two spaced supporting edges, and is connected and fixed to the lens 1 by the mounting base 42 located between the two second triangular plates 41. Specifically, it can be fixed with screws or bolts, and the mounting base 42 is connected and fixed to the corresponding two second triangular plates 41. The mounting base 42 connects the two second triangular plates 41 into a whole, thereby improving the stability of the mounting bracket 4 structure. Based on this, the mounting bracket 4 and the lens 1 are installed at multiple points, making it difficult for the lens 1 and the mounting bracket 4 to wobble relative to each other.

[0024] In addition, latches 5 are provided on both the base plate 31 and the first triangular plate 32, and the latches 5 press down on the outer surface of the lens 1. In this embodiment, there are at least two sets of latches 5, and both sets of latches 5 press down on the outer surface of the lens 1 on the side away from the mounting base 42. The latches 5 exert force on the lens 1, so that the lens 1 is pressed tightly onto each mounting bracket 4.

[0025] In a preferred embodiment, the lens 1 itself has at least one upwardly protruding flange 11. The upward protrusion means that the flange 11 protrudes in a direction away from the base plate 31 or the first triangular plate 32. The length extension direction of the flange 11 is the length direction of the lens 1, and its cross-section perpendicular to the length direction is semi-circular, meaning that the lens 1 itself has an arched structure. This arched structure can improve the rigidity of the lens 1. Two sets of flanges 11 can be provided. One set corresponds to the base plate 31; assuming the mounting bracket 4 has two sets, this set of flanges 11 is located between the two sets of mounting brackets 4. The other set corresponds to the first triangular plate 32, and the latch 5 can engage with the surface of the arc-shaped flange 11.

[0026] See Figure 1 as well as Figure 2 Furthermore, the structure of the light source 2 is refined, adopting a semi-circular arc shape. This semi-circular arc is not perfectly circular; the arc degree can be between 135 and 180 degrees. The light source 2 is positioned around the light entrance of the lens 1 to provide better lighting for the lens 1. Additionally, there is a certain gap between the inner ring surface of the light source 2 and the lens 1, allowing the heat generated during operation to dissipate through this gap, thus addressing the "heat haze" problem.

[0027] This invention also provides a wire bonding machine, including a welding head and the aforementioned vision device, both mounted on the frame of the wire bonding machine. In this embodiment, the vision device is applied to the wire bonding machine and used in conjunction with the welding head to provide visual positioning for the welding head. Because the lens 1 of the vision device has high rigidity and high structural stability after installation, it can effectively prevent lens 1 from shaking during the operation of the wire bonding machine. The vision device can provide high-precision positioning and also avoid the "heat haze" problem.

[0028] The above description is only a preferred 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 within the protection scope of the present invention.

Claims

1. A vision device for a wire bonding machine, comprising a lens, a light source, and a base, wherein the lens and the light source are both mounted on the base, characterized in that: The base includes a base plate and a first triangular plate. The first triangular plate is formed by extending outward from one side of the base plate. The main body structure of the lens is mounted on the base plate by a mounting bracket, and another part of the structure extends to the first triangular plate and is supported and fixed on the first triangular plate. The light source is connected and fixed to the first triangular plate. Each of the aforementioned mounting brackets includes two second triangular plates and a mounting base disposed between the two second triangular plates. The two second triangular plates are arranged in parallel and spaced apart, and one side of each of them is vertically mounted on the base plate. The apex angles of the two second triangular plates away from the base plate jointly support the lens. The mounting base is connected and fixed to the lens. The light source is semi-circular and is positioned around the light inlet of the lens; there is a gap between the inner ring surface of the light source and the lens.

2. The wire bonding machine vision device as described in claim 1, characterized in that: The base plate is provided with at least two mounting brackets, which are arranged sequentially at intervals along the extension direction of the lens, and the mounting brackets together support the lens.

3. The wire bonding machine vision device as described in claim 1, characterized in that: Both the base plate and the first triangular plate are provided with latches, which press down on the outer surface of the lens.

4. The wire bonding machine vision device as described in claim 1, characterized in that: The lens has at least one upwardly projecting flange that extends along the length of the lens.

5. The wire bonding machine vision device as described in claim 4, characterized in that: The cross-section of the flange in the vertical length direction is semi-circular.

6. A wire bonding machine, comprising a bonding head, characterized in that: It also includes the vision device as described in any one of claims 1-5, wherein both the vision device and the welding head are mounted on the frame.

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