CN112731107B

CN112731107B - Automatic defect inspection equipment for PCB (printed circuit board)

Info

Publication number: CN112731107B
Application number: CN202011580604.XA
Authority: CN
Inventors: 余爱琴; 梅建军; 冯朵花
Original assignee: Kunshan Leijing Electronics Co ltd
Current assignee: Kunshan Leijing Electronics Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2023-06-13
Anticipated expiration: 2040-12-28
Also published as: CN112731107A

Abstract

The invention provides automatic defect inspection equipment for a PCB (printed circuit board), which comprises a base; four groups of shaft brackets are fixedly arranged at the top of the base, four groups of conveying wheels are rotatably arranged on the inner sides of the shaft brackets through rotating shafts, and two groups of plate-type conveying belts are rotatably arranged outside the four groups of conveying wheels; t-shaped blocks are fixedly arranged at the outer convex plates of the plate-type conveyor belt; the top of the base is fixedly provided with an auxiliary frame, two sides of the top of the auxiliary frame are fixedly provided with two groups of L-shaped plates, and the inner sides of the L-shaped plates are aligned with the top of the T-shaped block; the metal rod is arranged to test the electrifying capacity of the circuit, adjacent metal ends are connected through the circuit, the LED lamp and the battery are connected in series in the circuit, the starting cylinder A is pulled backwards, the pushing frame drives the dovetail strip and the adjusting seat to move backwards, the metal ends are in contact with the contacts of the circuit board to conduct the path test, and the auxiliary function of adjusting the detection points according to different types of the circuit board is provided.

Description

Automatic defect inspection equipment for PCB (printed circuit board)

Technical Field

The invention belongs to the technical field of electronic accessories, and particularly relates to automatic defect inspection equipment for a PCB.

Background

A PCB, a printed wiring board, is one of the important components of the electronics industry. Almost every electronic device, as small as an electronic watch, a calculator, as large as a computer, a communication electronic device, a military weapon system, has only electronic components such as an integrated circuit, and a printed board is used for electrically interconnecting the respective components. The printed circuit board consists of an insulating base plate, connecting wires and bonding pads for assembling and welding electronic elements, and has the dual functions of a conductive circuit and the insulating base plate.

The patent with the patent number of CN102221563B, for example, discloses an automatic inspection device for defects of a PCB, which comprises a frame, wherein a horizontal arrangement board feeding roller set, a board feeding pressing roller set, a position detection switch for detecting the position of the PCB, a detection light source mechanism, a camera device, a board discharging pressing roller set, a horizontal arrangement board discharging roller set and a power device are arranged on the frame, the horizontal arrangement board feeding roller set, the board feeding pressing roller set, the board discharging pressing roller set and the power device are connected with a computer with a detection and control program and operated under the control of the computer. The invention has the advantages of simple structure, ingenious conception, high automation degree, high inspection efficiency, high detection accuracy, convenient operation and low manufacturing cost, and is suitable for general popularization and use.

Based on the above, the inspection equipment used at present mainly carries the removal to the circuit board through transmission machinery such as lead screw, does not possess the detection function of automated inspection circuit board connectivity, does not possess the auxiliary function of detecting point regulation according to the circuit board model is different, is unfavorable for carrying out short-term test to the circuit board to do not possess the function of quick measuring circuit board weight.

Accordingly, in view of the above, the present invention provides an automatic inspection apparatus for defects of a PCB to achieve the purpose of having more practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides an automatic inspection device for defects of a PCB, which is used for solving the problems that the inspection device used at present in the background art mainly conveys and moves the PCB through a transmission machine such as a screw rod, does not have a detection function for automatically detecting connectivity of the PCB, does not have an auxiliary function for adjusting detection points according to different types of the PCB, is not beneficial to rapidly detecting the PCB, and does not have a function for rapidly measuring weight of the PCB.

The invention discloses a purpose and an effect of automatic defect inspection equipment for a PCB, which are achieved by the following specific technical means:

an automatic inspection device for defects of a PCB (printed Circuit Board) comprises a base; four groups of shaft brackets are fixedly arranged at the top of the base, four groups of conveying wheels are rotatably arranged on the inner sides of the shaft brackets through rotating shafts, and two groups of plate-type conveying belts are rotatably arranged outside the four groups of conveying wheels; t-shaped blocks are fixedly arranged at the outer convex plates of the plate-type conveyor belt; the outer side of one group of the shaft brackets is provided with a motor which is in transmission connection with the rotating shaft of the conveying wheel; the top of the base is fixedly provided with an auxiliary frame, two sides of the top of the auxiliary frame are fixedly provided with two groups of L-shaped plates, and the inner sides of the L-shaped plates are aligned with the top of the T-shaped block; a placing canal is fixedly arranged on the front side of the auxiliary frame; the middle frame is fixedly arranged in the middle of the top of the base, and the top of the middle frame is of a cross structure.

Further, the placing channel also comprises an air cylinder A, a pushing frame, a dovetail strip, a middle plate, an air cylinder B, a movable plate and cutting bars; the side of the placing canal is fixedly provided with an air cylinder A, the telescopic end of the air cylinder A is fixedly provided with a pushing frame, and the front side of the placing canal is provided with a guide rod structure which is in sliding connection with the pushing frame; the upper side and the lower side of the two groups of pushing frames extend inwards, a dovetail strip is fixedly arranged between the extending parts, and an adjusting seat is arranged outside the dovetail strip in a sliding manner; the bottom of the front side of the placing canal is of an inclined plane structure; the inner side of the placing canal is fixedly provided with a middle plate, the middle of the middle plate is fixedly provided with a cylinder B, the telescopic end of the cylinder B is fixedly provided with a movable plate, and the bottom of the front side of the movable plate is provided with a flange structure; two groups of cutting bars are integrally arranged at the front end of the top of the inner side of the placing canal; the top of the movable plate is fixedly provided with a U-shaped frame.

Further, the adjusting seat also comprises a sliding rod, a sliding buckle, a metal rod and a metal end; a jackscrew is arranged at the front side of the adjusting seat; a slide bar is integrally arranged on one side of the adjusting seat, a slide buckle is arranged on the outer side of the slide bar in a sliding manner, and a jackscrew is arranged in the middle of the front side of the slide buckle; the rear side of the slide fastener is integrally provided with a metal rod; the front side of the slide fastener is provided with a metal end which is communicated with the metal rod through the internal connection of the slide fastener.

Further, the U-shaped frame also comprises a push plate and a spring rod; the inner end of the front side of the U-shaped frame is provided with an opening structure; the rear side of the push plate is integrally provided with a spring rod, and the spring rod is sleeved with springs and fixedly provided with a baffle plate through the U-shaped frame.

Further, the middle frame also comprises a cylinder C, a telescopic guide rod, a strip-shaped plate, a weighing sensor and a lifting seat; the cylinder C is integrally arranged in the middle of the top of the middle frame; two groups of telescopic guide rods are fixedly arranged on two sides of the top of the middle frame; a strip-shaped plate is fixedly arranged at the tops of the air cylinder C and the telescopic guide rod; two groups of weighing sensors are fixedly arranged at two ends of the top of the strip-shaped plate, lifting seats are fixedly arranged at the tops of the weighing sensors, and the lifting seats can penetrate through the inner sides of the two groups of plate-type conveyor belts when lifted.

Compared with the prior art, the invention has the following beneficial effects:

the metal rod is arranged to test the electrifying capacity of the circuit, the circuit board is vertically placed on the front side of the top of the placing canal, the wiring surface of the circuit board is forwards and then is slidably inserted into the gap between the cutting and the placing canal, and the air cylinder A is started to push the pushing frame forwards to clamp and fix the circuit board; according to different types of the circuit boards, the height of the adjusting seat and the position of the slide fastener are adjusted to align the metal rod with the wiring port of the circuit board; adjacent metal ends are connected by a circuit, an LED lamp and a battery are connected in series in the circuit, a starting cylinder A is pulled backwards, a pushing frame drives a dovetail strip and an adjusting seat to move backwards, so that the metal ends contact contacts of a circuit board to carry out a path test, and an auxiliary function of adjusting detection points according to different types of the circuit board is provided.

The circuit board can be conveyed backwards through the plate-type conveyor belt by means of the weighing sensor, the lifting seat is lifted by the starting cylinder C, the weight of the circuit board can be measured by the weighing sensor, two groups of circuit boards can be measured simultaneously, two sides of each group of circuit boards can be measured, the quality of the circuit boards is detected, and defective products can be detected.

Drawings

Fig. 1 is a schematic view of a perspective shaft side structure of the present invention.

Fig. 2 is a schematic view of a three-dimensional bottom view structure of the present invention.

Fig. 3 is a schematic view of a partial cross-sectional structure of the present invention.

Fig. 4 is a schematic view of an axial sectional structure of the present invention.

Fig. 5 is a partially enlarged schematic view of the structure of the present invention.

Fig. 6 is a schematic view of a B partial enlarged structure of the present invention.

In the figure, the correspondence between the component names and the drawing numbers is:

1. a base; 101. a shaft bracket; 102. a conveying wheel; 103. a plate conveyor belt; 104. a T-shaped block; 105. a motor; 2. an auxiliary frame; 201. an L-shaped plate; 3. placing a canal; 301. a cylinder A; 302. a propulsion rack; 303. dovetail strips; 304. an intermediate plate; 305. a cylinder B; 306. a movable plate; 307. cutting; 4. an adjusting seat; 401. a slide bar; 402. a slide fastener; 403. a metal rod; 404. a metal end; 5. a U-shaped frame; 501. a push plate; 502. a spring rod; 6. a middle frame; 601. a cylinder C; 602. a telescopic guide rod; 603. a strip-shaped plate; 604. a weighing sensor; 605. lifting the seat.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Examples:

as shown in fig. 1 to 6:

the invention provides automatic defect inspection equipment for a PCB (printed circuit board), which comprises a base 1; four groups of shaft brackets 101 are fixedly arranged at the top of the base 1, four groups of conveying wheels 102 are rotatably arranged on the inner side of the shaft brackets 101 through rotating shafts, and two groups of plate-type conveying belts 103 are rotatably arranged outside the four groups of conveying wheels 102; t-shaped blocks 104 are fixedly arranged at the outer convex plates of the plate-type conveyor belt 103; one group of the shaft brackets 101 is provided with a motor 105 at the outer side and is in transmission connection with the rotating shaft of the conveying wheel 102; the top of the base 1 is fixedly provided with an auxiliary frame 2, two groups of L-shaped plates 201 are fixedly arranged on two sides of the top of the auxiliary frame 2, and the inner sides of the L-shaped plates 201 are aligned with the top of the T-shaped blocks 104; the front side of the auxiliary frame 2 is fixedly provided with a placement canal 3; the placing canal 3 also comprises a cylinder A301, a pushing frame 302, a dovetail strip 303, a middle plate 304, a cylinder B305, a movable plate 306 and a cutting 307; the side of the placing canal 3 is fixedly provided with an air cylinder A301, the telescopic ends of the air cylinder A301 are fixedly provided with a pushing frame 302, and the front side of the placing canal 3 is provided with a guide rod structure which is in sliding connection with the pushing frame 302; the upper side and the lower side of the two groups of pushing frames 302 extend inwards, a dovetail strip 303 is fixedly arranged between the extending parts, and an adjusting seat 4 is arranged outside the dovetail strip 303 in a sliding manner; the adjusting seat 4 also comprises a sliding rod 401, a sliding buckle 402, a metal rod 403 and a metal end 404; the front side of the adjusting seat 4 is provided with a jackscrew; a slide bar 401 is integrally arranged on one side of the adjusting seat 4, a slide buckle 402 is arranged on the outer side of the slide bar 401 in a sliding manner, and a jackscrew is arranged in the middle of the front side of the slide buckle 402; a metal rod 403 is integrally provided on the rear side of the slider 402; the front side of the slide fastener 402 is provided with a metal end 404, and the metal end 404 is communicated with a metal rod 403 through the internal connection of the slide fastener 402; the bottom of the front side of the placing canal 3 is of an inclined plane structure; the inner side of the placing canal 3 is fixedly provided with a middle plate 304, the middle of the middle plate 304 is fixedly provided with a cylinder B305, the telescopic end of the cylinder B305 is fixedly provided with a movable plate 306, and the bottom of the front side of the movable plate 306 is provided with a flange structure; two sets of cutting 307 are integrally arranged at the front end of the top of the inner side of the placement canal 3; the top of the movable plate 306 is fixedly provided with a U-shaped frame 5; the middle of the top of the base 1 is fixedly provided with a middle frame 6, and the top of the middle frame 6 is of a cross structure.

Wherein, the U-shaped frame 5 also comprises a push plate 501 and a spring rod 502; the front inner end of the U-shaped frame 5 is provided with an opening structure; the rear side of push pedal 501 is provided with spring bar 502 in an integral type, and spring bar 502 all overlaps the spring and passes U-shaped frame 5 fixedly to be provided with the separation blade.

The middle frame 6 also comprises an air cylinder C601, a telescopic guide rod 602, a strip plate 603, a weighing sensor 604 and a lifting seat 605; the middle part of the top of the middle frame 6 is integrally provided with a cylinder C601; two groups of telescopic guide rods 602 are fixedly arranged on two sides of the top of the middle frame 6; a strip-shaped plate 603 is fixedly arranged at the top of the air cylinder C601 and the telescopic guide rod 602; two groups of weighing sensors 604 are fixedly arranged at two ends of the top of the strip-shaped plate 603, lifting seats 605 are fixedly arranged at the tops of the weighing sensors 604, and the lifting seats 605 can penetrate through the inner sides of the two groups of plate-type conveyor belts 103 when lifted.

Specific use and action of the embodiment:

in the invention, when in use, the circuit board is vertically placed on the front side of the top of the placement canal 3, the wiring surface of the circuit board is forward and then is slidingly inserted into the gap between the cutting 307 and the placement canal 3, the cylinder B305 is started to push the movable board 306 forward, and the circuit board is clamped and fixed; according to different types of the circuit boards, the height of the adjusting seat 4 and the position of the slide fastener 402 are adjusted to align the metal rod 403 with the wiring port of the circuit board; the adjacent metal ends 404 are connected by a circuit, and the LED lamp and the battery are connected in series in the circuit, the starting cylinder A301 is pulled backwards, the pushing frame 302 drives the dovetail strip 303 and the adjusting seat 4 to move backwards, and the metal ends 404 are contacted with the contacts of the circuit board for path test.

After the test, the cylinder B305 is loosened, the circuit board slides to the top of the front end of the plate-type conveyor belt 103, the circuit board is conveyed backwards through the plate-type conveyor belt 103, the lifting seat 605 is lifted by the starting cylinder C601, the weight of the circuit board can be measured by the weighing sensor 604, two groups of circuit boards can be measured simultaneously, two sides of each group of circuit board can be measured, and the quality of the circuit board is detected.

The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. An automatic inspection apparatus for defects of a PCB circuit board, comprising: a base (1); the bottom is provided with

Four groups of shaft brackets (101) are fixedly arranged at the top of the seat (1), and the inner sides of the shaft brackets (101) rotate through a rotating shaft

Four groups of conveying wheels (102) are arranged, and two groups of plate-type conveying belts are rotatably arranged outside the four groups of conveying wheels (102)

(103) The method comprises the steps of carrying out a first treatment on the surface of the T-shaped blocks (104) are fixedly arranged at the outer convex plates of the plate-type conveyor belt (103); by a means of

A motor (105) is arranged on the outer side of one group of the shaft brackets (101) and is in transmission connection with the rotating shaft of the conveying wheel (102);

an auxiliary frame (2) is fixedly arranged at the top of the base (1), and two sides of the top of the auxiliary frame (2) are fixedly arranged

Two groups of L-shaped plates (201) are arranged, and the inner sides of the L-shaped plates (201) are aligned with the tops of the T-shaped blocks (104);

a placing canal (3) is fixedly arranged at the front side of the auxiliary frame (2); the middle of the top of the base (1) is fixed

A middle frame (6) is fixedly arranged, and the top of the middle frame (6) is of a cross structure;

the placing canal (3) also comprises an air cylinder A (301), a pushing frame (302), a dovetail strip (303), and a middle part

A partition plate (304), a cylinder B (305), a movable plate (306), and a cutting (307); placing channels (3)

The side sides are fixedly provided with air cylinders A (301), and the telescopic ends of the air cylinders A (301) are fixedly provided with pushing frames

(302) The front side of the placing canal (3) is provided with a guide rod structure which is in sliding connection with the pushing frame (302); two sets of pushing

The upper side and the lower side of the feeding frame (302) extend inwards, a dovetail strip (303) is fixedly arranged between the extending parts, and a dovetail is arranged between the extending parts

An adjusting seat (4) is arranged outside the tail strip (303) in a sliding way; the bottom of the front side of the placing canal (3) is of an inclined plane structure;

an intermediate plate (304) is fixedly arranged on the inner side of the placement canal (3), and the intermediate plate (304) is fixedly arranged in the middle

The telescopic end of the cylinder B (305) is fixedly provided with a movable plate (306) which is provided with a cylinder B (305)

(306) A flange structure is arranged at the bottom of the front side of the bottom plate; the front end of the inner side top of the placing canal (3) is integrally arranged

Two sets of slips (307); the top of the movable plate (306) is fixedly provided with a U-shaped frame (5);

the adjusting seat (4) also comprises a sliding rod (401), a sliding buckle (402), a metal rod (403) and metal

An end (404); a jackscrew is arranged at the front side of the adjusting seat (4); one side of the adjusting seat (4) is integrally provided with

A slide bar (401), a slide fastener (402) is arranged on the outer side of the slide bar (401) in a sliding way, and the front side of the slide fastener (402)

A jackscrew is arranged in the middle; a metal rod (403) is integrally arranged at the rear side of the slide fastener (402); slider (402)

Is provided with a metal end (404), and the metal end (404) and a metal rod (403) penetrate through the slider (402)

Is communicated with the internal connection of the device;

when in use, the circuit board is vertically arranged at the front side of the top of the placing channel (3), and the wiring surface of the circuit board is directed forward

Then sliding and inserting the cutting (307) into the gap between the placing canal (3), and activating the cylinder B (305) to move

The board (306) is pushed forward to clamp and fix the circuit board; according to different types of circuit boards, the adjusting seat is adjusted

(4) The height of the metal bar (403) and the position of the slide fastener (402) are aligned with the wiring port of the circuit board;

adjacent metal ends (404) are connected by a circuit, and an LED lamp and a battery are connected in series in the circuit to start gas

The cylinder A (301) will pull backwards, the pushing frame (302) drives the dovetail bar (303) and the adjusting seat (4) to move backwards

And then moving to enable the metal end (404) to contact the contact of the circuit board for path test.

2. The automatic inspection apparatus for defects of a PCB circuit board according to claim 1, wherein: the U is

The shape frame (5) also comprises a push plate (501) and a spring rod (502); the front inner end of the U-shaped frame (5) is provided with

Is of an opening structure; the rear side of the push plate (501) is integrally provided with a spring rod (502), and the spring rod (502)

The springs are sleeved and the baffle plates are fixedly arranged through the U-shaped frame (5).

3. The automatic inspection apparatus for defects of a PCB circuit board according to claim 1, wherein: the middle part

The intermediate frame (6) also comprises an air cylinder C (601), a telescopic guide rod (602), a strip-shaped plate (603) and a weighing sensor

A sensor (604) for lifting the seat (605); an air cylinder C (601) is integrally arranged in the middle of the top of the middle frame (6);

two groups of telescopic guide rods (602) are fixedly arranged on two sides of the top of the middle frame (6); cylinder C (601) and extension

A strip-shaped plate (603) is fixedly arranged at the top of the shrinkage guide rod (602); the two ends of the top of the strip-shaped plate (603)

Two groups of weighing sensors (604) are fixedly arranged, and lifting is fixedly arranged at the top of each weighing sensor (604)

The seat (605) can penetrate through the inner sides of the two groups of plate conveyor belts (103) when the lifting seat (605) is lifted.