A precision electronic chip welding quality detection device based on machine vision

Abstract

The utility model relates to precision electronic chip welding quality detection device based on machine vision, including clamping and moving material unit and a plurality of stackable fixtures, clamping and moving material unit includes concave frame, clamping module and elevating unit, clamping module includes the left clamping rod and right clamping rod that are all inverted L type and are distributed in the both sides of conveyer belt, and the clamping cylinder that drives left clamping rod and right clamping rod carry out clamping object, left clamping rod and right clamping rod all are provided with clamping sliding block and drive unit that drive clamping sliding block moves along inverted L type track, elevating unit drives concave frame to make lifting movement, one up and down material action can complete the detection of a stack of fixtures, to reduce energy consumption, and also can very flexible adjustment detection height position, and also have better compatibility to the fixture of different size, and then can realize mixed material detection, especially suitable for small batch mixed material welding leg detection scene.

Description

Technical Field

[0001] This utility model relates to the field of chip welding quality inspection technology, and more specifically, to a precision electronic chip welding quality inspection device based on machine vision. Background Technology

[0002] After electronic chips are soldered, the solder joint surface needs to be inspected to check for issues such as missing pins, damage, and misalignment, and to avoid cold solder joints or short circuits caused by mechanical stress. In the early days, solder joint inspection was usually done manually. With the rise of vision inspection technology, the inspection of chip solder joints on the production line is now mostly done by vision systems. Conventional vision inspection systems usually consist of a conveyor belt, fixtures, light source, vision camera, and support. The conveyor belt moves one fixture to the inspection station at a time, performs vision inspection, and then sends it out again. This conventional inspection method requires frequent loading, positioning, and unloading operations, which results in high energy consumption. Therefore, there is a need for a precision electronic chip soldering quality inspection device based on machine vision that can reduce energy consumption. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a precision electronic chip welding quality inspection device based on machine vision, in order to address the above-mentioned deficiencies of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A precision electronic chip welding quality inspection device based on machine vision is constructed, comprising a conveyor belt, a support on one side of the conveyor belt, a vision camera and a light source assembly cooperating with the vision camera on the support, and a clamping and transferring unit and multiple stackable fixtures. The upper surface of each fixture is provided with a receiving groove that can fully accommodate a circuit board. The clamping and transferring unit includes a concave frame, a clamping module and a lifting unit, and the conveyor belt passes through the concave area of ​​the concave frame. The clamping module includes a left clamping rod and a right clamping rod, both inverted L-shaped, distributed on both sides of the conveyor belt, and a clamping cylinder that drives the left and right clamping rods to clamp objects. Each left and right clamping rod is provided with a clamping slider and a drive unit that drives the clamping slider to move along an inverted L-shaped trajectory. The lifting unit drives the concave frame to move up and down.

[0005] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a transverse hole inside the transverse side of the left clamping rod and the right clamping rod, and a longitudinal hole inside the longitudinal side of the left clamping rod and the right clamping rod; the transverse hole and the longitudinal hole are connected; and an inverted L-shaped slot is provided on the opposite side surface of the left clamping rod and the right clamping rod, which is connected to the corresponding transverse hole and the longitudinal hole.

[0006] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a clamping slider comprising a connecting section passing through the slot and clamping rubber blocks and sliding blocks located at both ends of the connecting section; the sliding block is cuboid in shape and matches the shape of the transverse hole and the longitudinal hole.

[0007] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a driving unit comprising a transverse electric push rod located at a transverse side and a longitudinal electric push rod located at a longitudinal side. Both the movable ends of the transverse electric push rod and the movable ends of the longitudinal electric push rod are provided with strong magnets. The sliding block is provided with an iron part that cooperates to attract the strong magnets.

[0008] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes sliding plates that slidably connect the left clamping rod and the right clamping rod on the two arms of the concave frame.

[0009] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a clamping cylinder that is a double-headed cylinder and is disposed on the upper surface of the bottom edge of the concave frame.

[0010] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a lifting unit comprising a lead screw and a lead screw motor. A guide rail plate is fixed on one side surface of the lead screw motor, and a slider slides longitudinally on the guide rail plate. The slider is fixedly connected to the concave frame.

[0011] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes an air pipe support for clamping and fixing an air pipe on one side surface of the lead screw motor, and the air pipe is connected to the clamping cylinder.

[0012] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a light source assembly comprising an annular mounting plate with its inner holes facing each other and an annular lamp, wherein the side of the mounting plate is fixedly connected to the bracket via a mounting block.

[0013] The precision electronic chip welding quality inspection device based on machine vision of the present invention includes a ring lamp that is square and has screw holes at the four corners of its upper surface; a waist groove corresponding to the screw holes is provided on the mounting plate, and the groove is opened along the corresponding diagonal of the mounting plate.

[0014] The beneficial effects of this utility model are as follows: In use, the stacked fixtures are placed on a conveyor belt and moved by the conveyor belt. When they reach the inspection station, the conveyor belt stops feeding, and the lifting unit drives the concave frame to move up and down, adjusting the height of the left and right clamping rods to align with the uppermost fixture. Then, the clamping cylinder operates, causing the left and right clamping rods to close. The clamping sliders on the left and right clamping rods clamp the uppermost fixture. The lifting unit drives the concave frame to rise, moving the uppermost fixture to the set inspection height position and holding it for a set time for the vision camera to take a picture. Then, under the action of the drive unit... The clamping slider moves along an inverted L-shaped trajectory, placing the top-layer fixture onto the conveyor belt. Then, the clamping cylinder operates, causing the left and right clamping rods to release. The drive unit then resets the clamping slider, performing the clamping operation on the second-layer fixture until the entire stack of fixtures is completed. The conveyor belt then transports the stack of fixtures away. The overall structure is reasonable and compact. A single loading and unloading operation can complete the inspection of a stack of fixtures, reducing energy consumption. It also allows for flexible adjustment of the inspection height and has good compatibility with fixtures of different sizes, enabling mixed material inspection, which is especially suitable for small-batch mixed material weld inspection scenarios. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. 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. Figure 1 This is a front view of a machine vision-based precision electronic chip welding quality inspection device according to a preferred embodiment of the present invention. Figure 2 This is a top view of the light source assembly of a machine vision-based precision electronic chip welding quality inspection device according to a preferred embodiment of the present invention. Figure 3 This is a side view of the concave frame of the machine vision-based precision electronic chip welding quality inspection device according to a preferred embodiment of the present invention. Figure 4 This is a cross-sectional view of the driving of the right clamping rod of the machine vision-based precision electronic chip welding quality inspection device according to a preferred embodiment of the present invention. Figure 5 This is an assembly cross-sectional view of the clamping slider of the machine vision-based precision electronic chip welding quality inspection device according to a preferred embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] The preferred embodiment of this utility model is a precision electronic chip welding quality inspection device based on machine vision, such as... Figure 1 As shown, see also Figures 2-5 The system includes a conveyor belt 1, a support 2 on one side of the conveyor belt 1, a vision camera 3 and a light source assembly 4 that works with the vision camera 3 on the support 2, a clamping and transferring unit and multiple stackable fixtures 6, the upper surface of the fixtures 6 having a receiving groove that can fully accommodate circuit boards; the clamping and transferring unit includes a concave frame 50, a clamping module 51 and a lifting unit 52, the conveyor belt 1 passes through the concave area of ​​the concave frame 50; the clamping module 51 includes a left clamping rod 510 and a right clamping rod 511, both inverted L-shaped, distributed on both sides of the conveyor belt 1, and a clamping cylinder 512 that drives the left clamping rod 510 and the right clamping rod 511 to clamp objects; each of the left clamping rod 510 and the right clamping rod 511 is provided with a clamping slider 513 and a drive unit 514 that drives the clamping slider 513 to move along an inverted L-shaped trajectory; the lifting unit 52 drives the concave frame 50 to move up and down (the lifting unit 52 is fixed to the external bottom surface or support frame). In use, the stacked fixtures 6 are placed on the conveyor belt 1 and moved by the conveyor belt 1. When they reach the inspection station (using photoelectric sensor detection and control in existing technology), the conveyor belt 1 stops feeding. The lifting unit 52 drives the concave frame 50 to move up and down, adjusting the height of the left clamping rod 510 and the right clamping rod 511 so that they are aligned with the uppermost fixture 6. Then, the clamping cylinder 512 operates, causing the left clamping rod 510 and the right clamping rod 511 to close. The clamping sliders 513 on the left clamping rod 510 and the right clamping rod 511 clamp the uppermost fixture 6. The lifting unit 52 drives the concave frame 50 to rise, moving the uppermost fixture 6 to the set inspection height position and holding it for a set time for the vision camera 3 to take a picture. Then, under the action of the drive unit 514, the clamping slider 513 moves along an inverted L-shaped trajectory, placing the uppermost fixture on the conveyor belt 1. Then, the clamping cylinder 512 runs, causing the left clamping rod 510 and the right clamping rod 511 to release. The drive unit 514 drives the clamping slider 513 to reset, and performs the clamping operation of the fixture 6 located on the second layer until the entire stack of fixtures 6 is completed. The conveyor belt 1 then runs to send away this stack of fixtures 6. The overall structure is reasonable and compact. One loading and unloading action can complete the inspection of a stack of fixtures, thereby reducing energy consumption. Moreover, the inspection height position can be adjusted very flexibly, and it has good compatibility with fixtures of different sizes. Thus, it can realize mixed material inspection, which is especially suitable for small batch mixed material weld foot inspection scenarios.

[0018] Preferably, both the left clamping rod 510 and the right clamping rod 511 have transverse holes 515 inside their transverse sides, and both have longitudinal holes 516 inside their longitudinal sides; the transverse holes 515 and the longitudinal holes 516 are connected; both the left clamping rod 510 and the right clamping rod 511 have inverted L-shaped slots 517 on their opposite side surfaces that are connected to the corresponding transverse holes 515 and longitudinal holes 516; the clamping slider 513 includes a connecting section 5130 passing through the slot 517 and clamping rubber blocks 5131 and sliding blocks 5132 located at both ends of the connecting section 5130; the sliding block 5132 is cuboid in shape and matches the shape of the transverse holes 515 and the longitudinal holes 516. With this structural design, the sliding block 5132 is matched with the transverse hole 515 and the longitudinal hole 516 to achieve sliding engagement. At the same time, the square shape provides a certain positioning effect, ensuring the reliability of the transverse and longitudinal movement of the external clamping block 5131.

[0019] Furthermore, the drive unit 514 includes a transverse electric actuator 5140 located at the transverse side and a longitudinal electric actuator 5141 located at the longitudinal side. Both the movable ends of the transverse electric actuator 5140 and the longitudinal electric actuator 5141 are equipped with strong magnets 5142. The sliding block 5132 is equipped with an iron part 5133 that engages with and attracts the strong magnets 5142. Through the attraction and engagement of the strong magnets 5142 and the iron part 5133, the switching between transverse and longitudinal movement states can be achieved. Specifically, the strong magnets 5142 on the transverse electric actuator 5140 first pull the sliding block 5132... The iron part 5133 causes the sliding block 5132 to reach the position directly above the longitudinal hole 516. At this time, the movable end of the longitudinal electric push rod 5141 is located at the upper opening of the longitudinal hole 516, providing support for the sliding block 5132 and attracting the iron part 5133. Then, the longitudinal electric push rod 5141 drives the sliding block 5132 to move downward. At this time, relying on the strong magnet 5142 at the movable end of the longitudinal electric push rod 5141, the gravity of the clamping slider 513, and the gravity of the fixture 6, the sliding block 5132 is disengaged from the strong magnet 5142 on the transverse electric push rod 5140, completing the switch between transverse and longitudinal movement states. Preferably, the two arms of the concave frame 50 are respectively provided with sliding plates 500 that slidably connect the left clamping rod 510 and the right clamping rod 511; the clamping cylinder 512 is a double-headed cylinder and is located on the upper surface of the bottom edge of the concave frame 50; the lifting unit 52 includes a lead screw 520 and a lead screw motor 521, a guide rail plate 522 is fixed on one side surface of the lead screw motor 521, a slider 523 slides longitudinally on the guide rail plate 522, and the slider 523 is fixedly connected to the concave frame 50; the lead screw motor 520... One side surface of the 20 is provided with an air pipe bracket 524 for clamping and fixing the air pipe, and the air pipe is connected to the clamping cylinder 512; the two arms of the concave frame 50 provide an installation platform for the sliding plate, and the sliding plate 500 can well ensure the reliability of the sliding of the left clamping rod 510 and the right clamping rod 511; the design of the double-headed cylinder, together with the concave frame 50, can make the structure very compact; the lifting unit 52 adopts a screw drive design, which can well ensure stability and height position accuracy; Compared to existing robotic arms, the structure described in this application has a lower cost and can be fitted with the conveyor belt 1, thus occupying less space.

[0020] Preferably, the light source assembly 4 includes an annular mounting plate 40 with its inner holes facing each other and a ring lamp 41. The side of the mounting plate 40 is fixedly connected to the bracket 2 via a mounting block 42. The ring lamp 41 is square and has screw holes 410 at each of the four corners of its upper surface. The mounting plate 40 has a waist groove 400 corresponding to the screw holes 410, and the groove direction of the waist groove 400 is along the corresponding diagonal direction of the mounting plate 40. The structure is reasonable and compact, and the design of the waist groove 400 can facilitate the assembly of the ring lamp 41 and the replacement of ring lamps of other sizes.

[0021] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A precision electronic chip welding quality inspection device based on machine vision, comprising a conveyor belt, a support being disposed on one side of the conveyor belt, and a vision camera and a light source assembly cooperating with the vision camera being disposed on the support, characterized in that, It also includes a clamping and transferring unit and multiple stackable fixtures, the upper surface of which is provided with a receiving groove to fully accommodate the circuit board; the clamping and transferring unit includes a concave frame, a clamping module, and a lifting unit, the conveyor belt passing through the concave area of ​​the concave frame; the clamping module includes a left clamping rod and a right clamping rod, both inverted L-shape, distributed on both sides of the conveyor belt, and a clamping cylinder that drives the left clamping rod and the right clamping rod to clamp the object; each of the left clamping rod and the right clamping rod is provided with a clamping slider and a drive unit that drives the clamping slider to move along the inverted L-shaped trajectory; the lifting unit drives the concave frame to perform lifting and lowering movements.

2. The precision electronic chip welding quality inspection device based on machine vision according to claim 1, characterized in that, The left and right clamping rods each have a transverse hole inside their transverse sides, and a longitudinal hole inside their longitudinal sides; the transverse holes and the longitudinal holes are connected; the opposite side surfaces of the left and right clamping rods each have an inverted L-shaped slot that is connected to the corresponding transverse and longitudinal holes.

3. The precision electronic chip welding quality inspection device based on machine vision according to claim 2, characterized in that, The clamping slider includes a connecting section passing through the slot and clamping rubber blocks and sliding blocks located at both ends of the connecting section; the sliding block is cuboid in shape and matches the shape of the transverse hole and the longitudinal hole.

4. The precision electronic chip welding quality inspection device based on machine vision according to claim 3, characterized in that, The drive unit includes a transverse electric actuator located at the transverse side and a longitudinal electric actuator located at the longitudinal side. Both the movable ends of the transverse electric actuator and the longitudinal electric actuator are provided with strong magnets. The sliding block is provided with an iron part that cooperates to attract the strong magnets.

5. The precision electronic chip welding quality inspection device based on machine vision according to claim 1, characterized in that, The two arms of the concave frame are respectively provided with sliding plates that slidably connect the left clamping rod and the right clamping rod.

6. The precision electronic chip welding quality inspection device based on machine vision according to claim 5, characterized in that, The clamping cylinder is a double-headed cylinder and is located on the upper surface of the bottom edge of the concave frame.

7. The precision electronic chip welding quality inspection device based on machine vision according to claim 5, characterized in that, The lifting unit includes a lead screw and a lead screw motor. A guide rail plate is fixed to one side surface of the lead screw motor, and a slider slides longitudinally on the guide rail plate. The slider is fixedly connected to the concave frame.

8. The precision electronic chip welding quality inspection device based on machine vision according to claim 7, characterized in that, One side surface of the lead screw motor is provided with an air pipe bracket for clamping and fixing the air pipe, and the air pipe is connected to the clamping cylinder.

9. The precision electronic chip welding quality inspection device based on machine vision according to claim 1, characterized in that, The light source assembly includes an annular mounting plate with its inner holes facing each other and an annular lamp. The side of the mounting plate is fixedly connected to the bracket via a mounting block.

10. The precision electronic chip welding quality inspection device based on machine vision according to claim 9, characterized in that, The ring light is square and has screw holes at all four corners of its upper surface; the mounting plate has a groove corresponding to the screw holes, and the groove is opened along the corresponding diagonal of the mounting plate.

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