CN112731107A

CN112731107A - Automatic PCB defect inspection equipment

Info

Publication number: CN112731107A
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: 2021-04-30
Anticipated expiration: 2040-12-28
Also published as: CN112731107B

Abstract

The invention provides a PCB circuit board defect automatic check-up device, comprising 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 side of each shaft bracket through rotating shafts, and two groups of plate-type conveying belts are rotatably arranged outside the four groups of conveying wheels; a T-shaped block is fixedly arranged at the convex plate at the outer side of the plate type conveyor belt; an auxiliary frame is fixedly arranged at the top of the base, two groups of L-shaped plates are fixedly arranged on two sides of the top of the auxiliary frame, and the inner sides of the L-shaped plates are aligned with the tops of the T-shaped blocks; the power-on capacity of the circuit can be tested by arranging the metal rod, the adjacent metal ends are connected by 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 connected with contacts of the circuit board to carry out access testing, and the auxiliary function of adjusting detection points according to different types of the circuit board is provided.

Description

Automatic PCB defect inspection equipment

Technical Field

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

Background

A PCB, i.e., a printed wiring board, which is called a printed board for short, is one of important parts in the electronic industry. Almost every kind of electronic equipment, as small as electronic watches, calculators, as large as computers, communication electronics, military weaponry systems, has electronic components such as integrated circuits, and printed boards are used to electrically interconnect the various components. The printed circuit board consists of an insulating bottom plate, a connecting lead and a welding disc for assembling and welding electronic elements, and has double functions of a conductive circuit and the insulating bottom plate.

The patent with the patent number of CN102221563B for example through retrieval discloses a PCB defect automatic inspection device, which comprises a frame, wherein the frame is provided with a horizontally arranged board feeding roller set, a board feeding pressing roller set, a position detection switch for detecting the position of a PCB, a detection light source mechanism, a camera device, a board discharging pressing roller set, a horizontally arranged board discharging roller set and a power device, the horizontally arranged board discharging roller set is connected with a computer with detection and control programs and is controlled and operated by the computer, when the device works, the PCB which is fed by the sequential action of the board feeding pressing roller set and the board discharging pressing roller set is gradually shot by the camera device, the shot images are spliced into an image by the computer, the image is compared with a previously prepared standard image by the computer to calculate and analyze to find out the defect, the coil with different color patterns is used for the outside of the defect, and the number of the board is recorded so as to search and. The invention has the advantages of simple structure, ingenious conception, high automation degree, high checking efficiency, high detection accuracy, convenient operation and low manufacturing cost, and is suitable for being popularized and used.

Based on the above, the inspection equipment used at present mainly carries the circuit board through transmission machinery such as lead screw and removes, does not possess the detection function of automated inspection circuit board connectivity, does not possess the auxiliary function of carrying out the check point according to the circuit board model difference and adjusting, is unfavorable for carrying out the short-term test to the circuit board to do not possess the function of rapid survey circuit board weight.

Therefore, in view of the above, research and improvement are made for the existing structure and defects, and an automatic inspection apparatus for defects of a PCB is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides an automatic inspection apparatus for a defect of a PCB, so as to solve the problems that the inspection apparatus currently used in the above background art mainly transports and moves a circuit board through a transmission mechanism such as a lead screw, and does not have a detection function for automatically detecting connectivity of the circuit board, does not have an auxiliary function for adjusting detection points according to different types of circuit boards, is not suitable for rapidly detecting the circuit board, and does not have a function for rapidly measuring weight of the circuit board.

The invention relates to a PCB circuit board defect automatic inspection device, which is achieved by the following specific technical means:

an automatic defect inspection device for a PCB 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 side of each shaft bracket through rotating shafts, and two groups of plate-type conveying belts are rotatably arranged outside the four groups of conveying wheels; a T-shaped block is fixedly arranged at the convex plate at the outer side of the plate type conveyor belt; a motor is arranged on the outer side of one group of the shaft frames and is in transmission connection with a rotating shaft of the conveying wheel; an auxiliary frame is fixedly arranged at the top of the base, two groups of L-shaped plates are fixedly arranged on two sides of the top of the auxiliary frame, and the inner sides of the L-shaped plates are aligned with the tops of the T-shaped blocks; a placing channel is fixedly arranged on the front side of the auxiliary frame; a 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.

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

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

Furthermore, 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 integral type of push pedal is provided with the spring beam, and the spring beam all overlaps establishes the spring and passes the fixed separation blade that is provided with of U-shaped frame.

Furthermore, the middle frame also comprises an air cylinder C, a telescopic guide rod, a strip-shaped plate, a weighing sensor and a lifting seat; the middle of the top of the middle frame is integrally provided with a cylinder C; two groups of telescopic guide rods are fixedly arranged on two sides of the top of the middle frame; the top parts of the cylinder C and the telescopic guide rod are fixedly provided with strip-shaped plates; the fixed two sets of weighing sensor that is provided with in top both ends of bar shaped plate, the fixed lifting seat that is provided with in weighing sensor's top can pass two sets of board-like conveyer belts inboardly when the lifting seat promotes.

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

the electrifying capacity of the circuit can be tested by arranging the metal rod, the circuit board is vertically placed on the front side of the top of the placing channel, the wiring surface of the circuit board is forward and then is inserted into a gap between the insertion strip and the placing channel in a sliding manner, the air cylinder A is started to push the pushing frame forward, and the circuit board is clamped and fixed; according to different types of the circuit board, the height of the adjusting seat and the position of the slide fastener are adjusted to enable the metal rod to be aligned with the wiring port of the circuit board; the adjacent metal ends are connected by a 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 contacted with the contacts of the 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.

Can carry out quality measurement to the circuit board through setting up weighing sensor, carry the circuit board backward through board-like conveyer belt, start cylinder C and rise the lifting seat, can utilize weighing sensor to measure the weight of circuit board, can measure two sets of circuit boards simultaneously to can measure both sides to each group's circuit board, detect the quality of circuit board, can detect out the defective products.

Drawings

Fig. 1 is a perspective axial side structure diagram of the present invention.

Fig. 2 is a schematic bottom view of the present invention.

Fig. 3 is a partial sectional structural schematic view of the present invention.

FIG. 4 is a cross-sectional structural view from the side of the shaft of the present invention.

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

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

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a base; 101. a pedestal; 102. a delivery wheel; 103. a plate conveyor; 104. a T-shaped block; 105. a motor; 2. an auxiliary frame; 201. an L-shaped plate; 3. placing a channel; 301. a cylinder A; 302. a propulsion frame; 303. a dovetail strip; 304. a middle plate; 305. a cylinder B; 306. a movable plate; 307. cutting; 4. an adjusting seat; 401. a slide bar; 402. sliding and buckling; 403. a metal rod; 404. a metal terminal; 5. a U-shaped frame; 501. pushing the plate; 502. a spring lever; 6. a middle frame; 601. a cylinder C; 602. a telescopic guide rod; 603. a strip plate; 604. a weighing sensor; 605. and (6) lifting the seat.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 6:

the invention provides a PCB circuit board defect automatic check-up equipment, including the 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 at the inner sides 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; a T-shaped block 104 is fixedly arranged at the convex plate at the outer side of the plate type conveyor belt 103; a motor 105 arranged on the outer side of one group of the shaft frames 101 is in transmission connection with a rotating shaft of the conveying wheel 102; an auxiliary frame 2 is fixedly arranged at the top of the base 1, 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 block 104; a placing channel 3 is fixedly arranged at the front side of the auxiliary frame 2; the placing channel 3 further comprises an air cylinder A301, a propelling frame 302, a dovetail strip 303, a middle plate 304, an air cylinder B305, a movable plate 306 and a cutting strip 307; the sides of the placing channel 3 are fixedly provided with air cylinders A301, the telescopic ends of the air cylinders A301 are fixedly provided with propelling frames 302, and the front side of the placing channel 3 is provided with a guide rod structure which is in sliding connection with the propelling frames 302; the upper side and the lower side of the two groups of propelling frames 302 extend inwards, a dovetail strip 303 is fixedly arranged between the extending positions, and an adjusting seat 4 is arranged outside the dovetail strip 303 in a sliding manner; the adjusting seat 4 further 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 sliding rod 401 is integrally arranged on one side of the adjusting seat 4, a sliding buckle 402 is arranged on the outer side of the sliding rod 401 in a sliding mode, and a jackscrew is arranged in the middle of the front side of the sliding buckle 402; a metal rod 403 is integrally arranged at the rear side of the slide fastener 402; the front side of the slide fastener 402 is provided with a metal end 404, and the metal end 404 and the metal rod 403 penetrate through the interior of the slide fastener 402 to be communicated; the bottom of the front side of the placing channel 3 is of an inclined plane structure; a middle plate 304 is fixedly arranged on the inner side of the placing channel 3, a cylinder B305 is fixedly arranged in the middle of the middle plate 304, a movable plate 306 is fixedly arranged at the telescopic end of the cylinder B305, and a flange structure is arranged at the bottom of the front side of the movable plate 306; two groups of cutting strips 307 are integrally arranged at the front end of the top of the inner side of the placing channel 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 inner end of the front side of the U-shaped frame 5 is provided with an opening structure; the rear side of push pedal 501 integral type is provided with spring beam 502, and spring beam 502 all overlaps establishes the spring and passes U-shaped frame 5 and fixedly be provided with the separation blade.

The middle frame 6 further comprises an air cylinder C601, a telescopic guide rod 602, a strip-shaped plate 603, a weighing sensor 604 and a lifting seat 605; the middle 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 cylinder C601 and the telescopic guide rod 602; two sets of weighing sensor 604 are fixedly arranged at two ends of the top of the strip-shaped plate 603, a lifting seat 605 is fixedly arranged at the top of the weighing sensor 604, and the lifting seat 605 can penetrate through the inner sides of the two sets of plate-type conveyor belts 103 when being lifted.

The specific use mode and function of the embodiment are as follows:

when the circuit board pushing device is used, a circuit board is vertically placed on the front side of the top of the placing channel 3, the wiring surface of the circuit board is forward and then is inserted into a gap between the inserting strip 307 and the placing channel 3 in a sliding mode, the air cylinder A301 is started to push the pushing frame 302 forward, and the circuit board is clamped and fixed; according to different types of circuit boards, the height of the adjusting seat 4 and the position of the slide fastener 402 are adjusted to enable the metal rod 403 to be aligned with the wiring port of the circuit board; the adjacent metal ends 404 are connected by a line, an LED lamp and a battery are connected in series in the line, 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 made to contact with contacts of the circuit board to perform a 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 cylinder C601 is started to lift the lifting seat 605, the weight of the circuit board can be measured by the weighing sensor 604, meanwhile, two groups of circuit boards can be measured, two sides of each group of circuit board can be measured, and the quality of the circuit board can be detected.

The embodiments of the present 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 embodiment was 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); 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 sides 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); a T-shaped block (104) is fixedly arranged at the convex plate at the outer side of the plate type conveyor belt (103); a motor (105) is arranged on the outer side of one group of the shaft brackets (101) and is in transmission connection with a rotating shaft of the conveying wheel (102); the top of the base (1) is fixedly provided with an auxiliary frame (2), two sides of the top of the auxiliary frame (2) are fixedly provided with two groups of L-shaped plates (201), and the inner sides of the L-shaped plates (201) are aligned to the top of the T-shaped block (104); a placing channel (3) is fixedly arranged on the front side of the auxiliary frame (2); a middle frame (6) is fixedly arranged in the middle of the top of the base (1), and the top of the middle frame (6) is of a cross structure.

2. The automatic defect inspection apparatus for PCB of claim 1, wherein: the placing channel (3) further comprises an air cylinder A (301), a propelling frame (302), a dovetail strip (303), a middle plate (304), an air cylinder B (305), a movable plate (306) and an inserting strip (307); the sides of the placing channel (3) are fixedly provided with cylinders A (301), the telescopic ends of the cylinders A (301) are fixedly provided with propelling frames (302), and the front side of the placing channel (3) is provided with a guide rod structure which is in sliding connection with the propelling frames (302); the upper side and the lower side of the two groups of propulsion frames (302) extend inwards, a dovetail strip (303) is fixedly arranged between the extending positions, and an adjusting seat (4) is arranged outside the dovetail strip (303) in a sliding manner; the bottom of the front side of the placing channel (3) is of an inclined plane structure; a middle plate (304) is fixedly arranged on the inner side of the placing channel (3), a cylinder B (305) is fixedly arranged in the middle of the middle plate (304), a movable plate (306) is fixedly arranged at the telescopic end of the cylinder B (305), and a flange structure is arranged at the bottom of the front side of the movable plate (306); two groups of cutting slips (307) are integrally arranged at the front end of the top of the inner side of the placing channel (3); the top of the movable plate (306) is fixedly provided with a U-shaped frame (5).

3. The automatic defect inspection apparatus for PCB of claim 2, wherein: the adjusting seat (4) further 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 sliding rod (401) is integrally arranged on one side of the adjusting seat (4), a sliding buckle (402) is arranged on the outer side of the sliding rod (401) in a sliding mode, and a jackscrew is arranged in the middle of the front side of the sliding buckle (402); a metal rod (403) is integrally arranged at the rear side of the slide fastener (402); the front side of the slide fastener (402) is provided with a metal end (404), and the metal end (404) is communicated with the metal rod (403) through the interior of the slide fastener (402).

4. The automatic defect inspection apparatus for PCB of claim 2, wherein: the U-shaped frame (5) further comprises a push plate (501) and a spring rod (502); the inner end of the front side of the U-shaped frame (5) is provided with an opening structure; the rear side of the push plate (501) is integrally provided with a spring rod (502), and the spring rod (502) is sleeved with a spring and penetrates through the U-shaped frame (5) to be fixedly provided with a blocking piece.

5. The automatic defect inspection apparatus for PCB of claim 1, wherein: the middle frame (6) further comprises an air cylinder C (601), a telescopic guide rod (602), a strip-shaped plate (603), a weighing sensor (604) and a lifting seat (605); the middle of the top of the middle frame (6) is integrally provided with a cylinder C (601); 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 cylinder C (601) and the telescopic guide rod (602); two sets of weighing sensors (604) are fixedly arranged at two ends of the top of the strip-shaped plate (603), a lifting seat (605) is fixedly arranged at the top of each weighing sensor (604), and the lifting seat (605) can penetrate through the inner sides of the two sets of plate-type conveyor belts (103) when lifted.