A fully automatic anti-welding machine

Abstract

The utility model discloses a full -automatic anti -soldering machine, including interval setting's first conveying device and second conveying device, be located between first conveying device and second conveying device and alignment device, with second conveying device delivery end link's coating station, and controlling means, alignment device includes jacking device, support seat of support in jacking device, be located in X -axis slide rail of support seat, with X -axis slide rail sliding connection's alignment platform, with alignment platform connection's XYY drive unit, be used for circuit board positioning's vacuum chuck, be used for detecting circuit board to position signal's sensor, be located in the CCD camera of alignment platform top, and be located in light source group of alignment platform top. Full -automatic anti -soldering machine of the utility model provides a variety of light source and CCD camera combination, can choose different light source according to the target characteristic on circuit board, makes the CCD camera clear collection target feature, provides reliable condition for image processing to improve alignment precision.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing technology, specifically to a fully automatic anti-soldering machine. Background Technology

[0002] Solder masking is a core process in printed circuit board (PCB) manufacturing. It primarily protects the copper layers in non-soldering areas from oxidation, solder bridging, and chemical corrosion, while maintaining board insulation and aiding in component positioning. The solder masking process involves transporting the PCB to the processing area, where a vision system identifies reference points on the PCB and uses these points to achieve precise board positioning. This ensures the coating head accurately sprays the mask onto the designated areas according to a pre-defined path.

[0003] A light source is required when locating reference points on a circuit board. In existing technologies, a common single light source is used during circuit board alignment. For reference points of different shapes on the circuit board, using an inappropriate light source can cause unclear images, thus affecting alignment accuracy.

[0004] Therefore, the purpose of this utility model is to provide a fully automatic anti-welding machine that can improve alignment accuracy. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a fully automatic anti-welding machine that combines multiple light sources with a CCD camera. Different light sources are selected according to the characteristics of the target on the circuit board, so that the CCD camera can clearly capture the target features, providing reliable conditions for image processing and thus improving alignment accuracy.

[0006] The technical solution of this utility model is:

[0007] A fully automatic anti-welding machine includes a first conveying device and a second conveying device spaced apart, an alignment device located between the first and second conveying devices and connected to the discharge end of the second conveying device, and a control device. The alignment device includes a lifting device, a support base supported on the lifting device, an X-axis slide rail located on the support base, an alignment platform slidably connected to the X-axis slide rail, an XYY drive unit connected to the alignment platform, a vacuum suction cup for positioning the circuit board, a sensor for detecting the circuit board's positioning signal, a CCD camera located above the alignment platform, and a light source group located above the alignment platform. The light source group includes a coaxial light source integrated into the CCD camera, strip light sources located on both sides of the alignment platform and close to the circuit board in the vertical direction, a high-angle light source located above the alignment platform, and a multi-band light source. The lifting device, sensor, vacuum suction cup, XYY drive unit, CCD camera, light source group, and conveying device are all electrically connected to the control device.

[0008] Furthermore, the XYY drive unit includes an X-axis servo motor, a Y1-axis servo motor, and a Y2-axis servo motor, with the Y1-axis servo motor and the Y2-axis servo motor located at both ends on the same side of the alignment platform.

[0009] Furthermore, the sensor is a photoelectric through-beam sensor.

[0010] Furthermore, the lifting device is a cylinder.

[0011] Compared with the prior art, the fully automatic anti-welding machine provided by this utility model has the following advantages:

[0012] I. The fully automatic anti-welding machine provided by this utility model offers multiple light sources combined with a CCD camera. Different light sources can be selected according to the characteristics of the target on the circuit board, enabling the CCD camera to clearly capture the target features, providing reliable conditions for image processing, thereby improving alignment accuracy. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram of the fully automatic anti-welding machine of this utility model;

[0015] Figure 2 yes Figure 1 The diagram shown illustrates the connection between the alignment platform and the XYY drive unit in the fully automatic anti-welding machine.

[0016] Figure 3 This is a schematic diagram of the control section of the fully automatic anti-welding machine of this utility model. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions in the embodiments of this utility model, and to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be further described below.

[0018] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0019] Please refer to the following: Figures 1 to 3 ,in Figure 1 This is a structural schematic diagram of the fully automatic anti-welding machine of this utility model. Figure 2 yes Figure 1 The diagram shown illustrates the connection between the alignment platform and the XYY drive unit in the fully automatic anti-welding machine. Figure 3 This is a schematic diagram of the control section of the fully automatic anti-welding machine of this utility model. The fully automatic anti-welding machine of this utility model includes a first conveying device 1 and a second conveying device 2 arranged at intervals, an alignment device 3 located between the first conveying device 1 and the second conveying device 2, a coating station 4 connected to the discharge end of the second conveying device, and a control device 5. The coating station is used to perform precise spraying on the anti-welding area.

[0020] The first conveyor 1 is used to transport the circuit board to the alignment station, and the second conveyor 2 is used to transport the aligned circuit board to the coating station. In specific applications, the distance between the first conveyor 1 and the second conveyor 2 can be adjusted according to the specifications of the circuit board. When the circuit board is transported to the alignment station by the conveyor devices, the first conveyor 1 and the second conveyor 2 stop working. Under conventional action, the front end of the circuit board can overlap with the second conveyor, so that after alignment, the circuit board continues to be transported forward under the action of the first and second conveyor devices. Preferably, the first conveyor 1 and the second conveyor 2 are belt conveyor devices.

[0021] The alignment device 3 includes a lifting device 31, a support base 32 supported on the lifting device, an X-axis slide rail 33 mounted on the support base 32, an alignment platform 34 slidably connected to the X-axis slide rail, an XYY drive unit 35 connected to the alignment platform 34, a vacuum suction cup 36 mounted on the alignment platform for circuit board positioning, a sensor 37 for detecting the circuit board's positioning signal, a CCD camera 38 mounted above the alignment platform, and a light source group 39 mounted above the alignment platform. The lifting device, sensor, vacuum suction cup, XYY drive unit, CCD camera, light source group, and conveying device are all electrically connected to the control device. During circuit board conveying, the alignment platform 34 is coplanar with the first and second conveying devices. During alignment, the lifting device lifts the alignment platform a certain distance, causing the circuit board to detach from the conveying devices.

[0022] The lifting device 31 is a cylinder that drives the alignment platform to rise or fall. When the circuit board reaches the alignment platform, the lifting device drives the alignment platform to rise. The alignment platform is higher than the first and second conveying devices, and the circuit board is separated from the conveying devices. After the circuit board completes the pre-alignment, the lifting device drives the alignment platform to fall, so that the alignment platform and the conveying devices are on the same plane. Then, under the action of the conveying devices, it is transported to the coating station.

[0023] The support base 32 is not rigidly connected to the lifting device 31. It is used to support the alignment platform. When the alignment platform needs to be rotated, the support base can rotate relative to the lifting device.

[0024] The X-axis slide rail 33 is mounted on the support base. The alignment platform is connected to the X-axis slide rail via a slider. Under the action of power, the alignment platform can move along the X-axis.

[0025] The XYY drive unit 35 includes an X-axis servo motor 351, a Y1-axis servo motor 352, and a Y2-axis servo motor 353, with the Y1-axis servo motor 352 and Y2-axis servo motor 353 located at opposite ends on the same side of the alignment platform. The X-axis servo motor 351 drives the alignment platform to move along the X-axis slide rail 33, while the Y1-axis servo motor 352 and Y2-axis servo motor 353 cooperate to achieve movement or rotation in the Y-axis direction. Specifically, when the Y1-axis servo motor 352 and Y2-axis servo motor 353 move synchronously, they push the alignment platform to move along the Y-axis direction; when the Y1-axis servo motor 352 and Y2-axis servo motor 353 move differentially, they achieve rotation of the alignment platform.

[0026] The alignment platform 34 is equipped with a vacuum suction cup 36, which is used to vacuum-adhere the circuit board and prevent it from shifting. The vacuum suction cup 36 is connected to a vacuum pipeline. When the circuit board reaches the alignment platform, the vacuum generator connected to the vacuum suction cup is activated. After alignment is completed, the vacuum generator stops working. Specifically, the vacuum suction cup and the alignment platform are on the same plane, and the vacuum pipeline connecting the vacuum suction cup passes through the bottom of the alignment platform. The vacuum generator is located below the alignment platform.

[0027] Sensor 37 is used to detect whether the circuit board has reached the pre-alignment position and sends the detection signal to the control device. When the circuit board is detected to have reached the designated position, the control device controls the conveyor to stop working and controls the lifting device to drive the alignment platform to move upward. In this embodiment, sensor 37 is a photoelectric through-beam sensor.

[0028] CCD camera 38 is used to acquire image data of the circuit board and transmit the data to the control device. The control device compares and analyzes the actual captured image data with preset image information, calculates the positional deviation of the target on the circuit board, and then calculates the coordinate adjustment data of the alignment platform to generate control commands. The control device then sends the coordinate adjustment control commands of the alignment platform to the XYY drive unit 35. According to the received control commands, the XYY drive unit 35 drives the alignment platform to move along the X and Y axes, completing the pre-alignment action of the alignment platform and making the target position on the circuit board consistent with the stored information.

[0029] The light source group 39 includes multiple light sources, each electrically connected to the control device and receiving control commands from the control device. The control device pre-stores circuit board information, including the shape, color, grayscale, edge gradient, and other features of each target. In this invention, multiple light sources are used in combination to adapt to the shape and characteristics of targets on different types of circuit boards. In specific applications, different light sources are selected according to the shape and characteristics of the target, which can improve the image clarity acquired by the CCD camera 38, thereby identifying the precise features of the target and calculating the precise actual coordinates of the target.

[0030] In this invention, the light source group 39 includes a coaxial light source (not shown) integrated into the CCD camera, strip light sources 392 positioned on both sides of the alignment platform and vertically close to the circuit board, a high-angle light source 393 positioned above the alignment platform, and a multi-band light source 394. The coaxial light source is suitable for identifying highly reflective targets, eliminating shadows and providing uniform illumination. The strip light source is used for low-angle target illumination, with the light almost parallel to the object's surface, used for identifying carved or raised targets, clearly outlining the target's edges and creating a sharp contrast with the dark background, suitable for extracting target features such as the center and edges. The high-angle light source can represent the color and texture of the target surface, such as for identifying cross-shaped targets. The multi-band light source integrates multiple LEDs of different wavelengths, including ultraviolet, blue, green, red, and infrared, allowing selection of light sources with the same or complementary colors as the target color, greatly increasing or decreasing the contrast of specific colors.

[0031] Different light sources are selected based on the different characteristics of the targets on the circuit board to maximize the visual information of the target features, providing reliable conditions for image processing and thus improving alignment accuracy.

[0032] The working principle of this fully automatic anti-welding machine is as follows:

[0033] Start the first conveyor to transport the circuit board;

[0034] The photoelectric through-beam sensor detects the arrival signal of the circuit board in real time. When the circuit board reaches the preset position, the photoelectric through-beam sensor detects the arrival signal of the circuit board and sends the signal to the control device. The control device controls the motor of the first conveying device to stop working, and the circuit board moves to the alignment platform under the action of inertia.

[0035] The control device controls the cylinder of the lifting device to extend, driving the alignment platform to rise, so that the circuit board is separated from the first conveying device.

[0036] The control device controls the vacuum generator connected to the vacuum chuck to turn on, and the vacuum chuck adsorbs the circuit board to fix it in place.

[0037] The control device controls the corresponding light source to turn on according to the circuit board model, and controls the CCD camera to acquire images of the circuit board. The acquired information is sent to the control device, which compares and analyzes the received image information with the pre-stored image information, identifies the target features, calculates the actual target coordinates, calculates the position deviation of the circuit board, and then calculates the coordinate adjustment data of the alignment platform to form a control command. The control device then sends the coordinate adjustment control command of the alignment platform to the XYY drive unit.

[0038] The X-axis servo motor, Y1-axis servo motor, and Y2-axis servo motor in the XYY drive unit control the alignment platform to move accordingly according to the corresponding control commands, thereby realizing the displacement and angular deflection of the circuit board in the X-axis and Y-axis directions and completing automatic pre-alignment;

[0039] The control device controls the retraction of the lifting device so that the alignment platform and the conveying device are on the same plane;

[0040] Start the drive motors of the first and second conveying devices. The second conveying device transports the circuit board to the coating station to complete the coating operation of the solder resist area. The first conveying device transports the next circuit board to the alignment platform.

[0041] The embodiments of this utility model have been described in detail above, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A fully automatic anti-welding machine, characterized in that, The system includes a first conveying device and a second conveying device spaced apart, an alignment device located between the first and second conveying devices and connected to the discharge end of the second conveying device, and a control device. The alignment device includes a lifting device, a support base supported on the lifting device, an X-axis slide rail located on the support base, an alignment platform slidably connected to the X-axis slide rail, an XYY drive unit connected to the alignment platform, a vacuum suction cup for positioning the circuit board, a sensor for detecting the circuit board's positioning signal, a CCD camera located above the alignment platform, and a light source group located above the alignment platform. The light source group includes a coaxial light source integrated into the CCD camera, strip light sources located on both sides of the alignment platform and close to the circuit board in the vertical direction, a high-angle light source located above the alignment platform, and a multi-band light source. The lifting device, sensor, vacuum suction cup, XYY drive unit, CCD camera, light source group, first conveying device, and second conveying device are all electrically connected to the control device.

2. The fully automatic anti-welding machine according to claim 1, characterized in that, The XYY drive unit includes an X-axis servo motor, a Y1-axis servo motor, and a Y2-axis servo motor, with the Y1-axis servo motor and the Y2-axis servo motor located at both ends on the same side of the alignment platform.

3. The fully automatic anti-welding machine according to claim 1, characterized in that, The sensor is a photoelectric through-beam sensor.

4. The fully automatic anti-welding machine according to claim 1, characterized in that, The lifting device is a cylinder.

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