CN111781489A - Automatic PCB defect inspection equipment - Google Patents
Automatic PCB defect inspection equipment Download PDFInfo
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- CN111781489A CN111781489A CN202010634075.0A CN202010634075A CN111781489A CN 111781489 A CN111781489 A CN 111781489A CN 202010634075 A CN202010634075 A CN 202010634075A CN 111781489 A CN111781489 A CN 111781489A
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- 238000007689 inspection Methods 0.000 title claims abstract description 60
- 230000007547 defect Effects 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000007906 compression Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
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- Life Sciences & Earth Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses automatic defect inspection equipment for a PCB (printed circuit board), which comprises a base, wherein supporting legs are fixedly arranged at the bottom of the base, a workbench is fixedly arranged in the middle of the top of the base, guide rails are arranged on two sides of the workbench, clamping mechanisms are symmetrically arranged on the guide rails and are in sliding connection with the guide rails, a first conveyor belt and a second conveyor belt are fixedly arranged at two ends of the base, a support frame is fixedly arranged above the base, a third conveyor belt is fixedly arranged in the middle of the support frame, and an inspection mechanism is fixedly arranged at the top of the. According to the invention, through the cooperation of the third conveyor belt, the rotary table and the clamping mechanism, the quick feeding, alignment and clamping of the PCB are realized, the inspection mechanism can complete the appearance inspection and the power-on inspection of the PCB, qualified products can be discharged through the first conveyor belt after the inspection, unqualified products can be recovered through the second conveyor belt, the automatic inspection of the defects of the PCB is realized, and the inspection efficiency of the PCB is greatly improved.
Description
Technical Field
The invention relates to the field of PCB (printed circuit board), in particular to automatic defect inspection equipment for a PCB.
Background
Pcb (printed circuit board), or printed wiring board for short, is one of the important components in the electronics 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 circuit can replace complex wiring to realize electrical connection among elements in the circuit, thereby simplifying the assembly and welding work of electronic products, reducing the wiring workload in the traditional mode and greatly lightening the labor intensity of workers; and the volume of the whole machine is reduced, the product cost is reduced, and the quality and the reliability of the electronic equipment are improved. The printed circuit board has good product consistency, can adopt standardized design, and is beneficial to realizing mechanization and automation in the production process. Meanwhile, the whole printed circuit board subjected to assembly and debugging can be used as an independent spare part, so that the exchange and maintenance of the whole product are facilitated.
At present, a great part of product defect inspection in the production process of the PCB is manually and visually inspected, and the other part of the product defect inspection is mechanically inspected. When mechanical inspection is adopted, most of the tracing images obtained by line scanning are compared with correct circuit board images of a computer, the computer automatically analyzes and finds out a circuit board defect inspection mode, and the inspection precision is greatly improved compared with manual inspection. However, an operator needs to place the PCB to be inspected on the inspection table, manually mark the inspected defect position, and manually take out the PCB to enter the next repairing process. The mechanical inspection is realized by manual operation, the automation degree is low, the inspection speed is low, and the operation is relatively complicated. Therefore, there is a need for an apparatus capable of automatically inspecting defects of a PCB to meet the requirement of PCB inspection.
Disclosure of Invention
In order to solve the defects mentioned in the background art, the invention aims to provide automatic defect inspection equipment for a PCB, which is characterized in that a third conveyor belt is used for feeding the PCB, the position of the PCB is calibrated and fixed through a turntable and a clamping mechanism, the PCB is conveyed through a guide rail, the PCB is subjected to appearance inspection through a camera device, whether a circuit of the PCB is connected or not is inspected through electrification detection, the qualified PCB is discharged through a first conveyor belt, and the unqualified PCB is recovered through a second conveyor belt, so that the automatic defect inspection of the PCB is realized, and the inspection efficiency of the PCB is greatly improved.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a PCB circuit board defect automatic check out test set, includes the base, base bottom fixed mounting supporting leg, fixed mounting workstation in the middle of the base top, the workstation both sides are equipped with the guide rail, the symmetry is equipped with fixture on the guide rail, fixture and guide rail sliding connection, the first conveyer belt of base both ends fixed mounting and second conveyer belt, base top fixed mounting support frame, fixed mounting third conveyer belt in the middle of the support frame, support frame top fixed mounting inspection mechanism.
Preferably, the workstation includes the fixed plate, first mounting groove and second mounting groove have been seted up on the fixed plate surface, fixed mounting LED lamp plate in the first mounting groove, fixed mounting revolving stage in the second mounting groove, install infrared position sensor on the support of revolving stage top, revolving stage bottom fixed mounting axis of rotation, the axis of rotation rotates with the fixed plate to be connected, the output shaft meshing of gear and first motor is passed through to the axis of rotation bottom, first motor fixed mounting is in the base bottom, the top surface of LED lamp plate and revolving stage all flushes with the top surface of fixed plate.
Preferably, the one end of first conveyer belt and the lateral wall laminating that the workstation is close to LED lamp plate one side, the one end of second conveyer belt and the lateral wall laminating that the workstation is close to revolving stage one side, the top surface height of first conveyer belt and second conveyer belt is less than the upper surface of workstation.
Preferably, one end of the third conveyor belt is arranged above the rotary table, the end, close to the rotary table, of the third conveyor belt is inclined downwards by 15-30 degrees, and the bottom surface of the end, close to the rotary table, of the third conveyor belt is higher than the upper surface of the working table.
Preferably, the guide rail includes the spout, and spout fixed mounting is on the base surface of workstation both sides, and the length of spout is greater than the workstation, runs through in the spout and is equipped with the lead screw, and the lead screw rotates with the spout to be connected, and the one end of lead screw is connected with the output of second motor, and second motor fixed mounting is at the base top, fixed mounting sliding seat on the lead screw, sliding seat and lead screw thread fit.
Preferably, fixture includes first electric putter, first electric putter's output fixed mounting ejector pad, and the mounting hole has been seted up on the ejector pad surface, and first electric putter one side is kept away from to the ejector pad is equipped with the grip block, and the grip block passes through connecting rod and ejector pad sliding connection, connecting rod one end and gripper block fixed connection, and the connecting rod other end runs through the mounting hole on the ejector pad, and the connecting rod passes ejector pad one end and is equipped with spacing lug, and the connecting rod surface between ejector pad and the grip block is equipped with compression spring.
Preferably, the first electric push rod is fixedly installed on the sliding seat, the output direction of the first electric push rod is perpendicular to the screw rod, and the bottom of the clamping block is attached to the upper surface of the workbench.
Preferably, the inspection mechanism comprises a fixing rod, the fixing rod is horizontally and fixedly installed at the top of the support frame, the camera device is fixedly installed in the middle of the bottom of the fixing rod, a second electric push rod is fixedly installed on one side of the top of the fixing rod, the output end of the second electric push rod vertically penetrates through the fixing rod, an inspection plate is fixedly installed at the bottom end of the second electric push rod, and a plurality of conductive pins are fixedly installed at the bottom of the inspection plate.
The invention has the beneficial effects that:
according to the invention, the PCB is loaded through the third conveyor belt, the position of the PCB is calibrated and fixed through the turntable and the clamping mechanism, the PCB is conveyed through the guide rail, the PCB is subjected to appearance inspection through the camera device, whether the circuit of the PCB is connected or not is detected through electrifying detection, the qualified PCB is discharged through the first conveyor belt, the unqualified PCB is detected and recovered through the second conveyor belt, the automatic defect inspection of the PCB is realized, and the inspection efficiency of the PCB is greatly improved.
One end of the third conveying belt close to the rotary table is inclined downwards, so that the front side and the back side of the PCB can be prevented from being turned over when the PCB falls down; the rotary table is matched with the infrared position sensor, so that the side edge of the PCB can be aligned with the workbench, and subsequent outer tube and power-on inspection can be conveniently carried out; the push block pushes the clamping block to be attached to two sides of the PCB through the compression spring, the compression spring can play a good buffering role, and the PCB is prevented from deforming or being damaged due to rigid collision between the clamping block and the PCB; set up the LED lamp plate and shine by PCB circuit board bottom, light sees through the outer tube defect that PCB circuit board can comparatively audio-visual observation PCB circuit board.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the structure of the inventive work bench;
FIG. 4 is a front view of the table of the present invention;
FIG. 5 is a schematic view of the construction of the guide rail of the present invention;
FIG. 6 is a schematic view of the clamping mechanism of the present invention;
fig. 7 is a schematic view of the structure of the inspection mechanism of the present invention.
In the figure:
1-base, 2-supporting legs, 3-workbench, 4-guide rail, 5-clamping mechanism, 6-first conveyor belt, 7-second conveyor belt, 8-supporting frame, 9-third conveyor belt, 10-inspection mechanism, 11-fixing plate, 12-first mounting groove, 13-second mounting groove, 14-LED lamp panel, 15-rotary table, 16-rotary shaft, 17-first motor, 18-sliding groove, 19-screw rod, 20-second motor, 21-sliding seat, 22-first electric push rod, 23-push block, 24-clamping block, 25-connecting rod, 26-compression spring, 27-fixing rod, 28-camera device, 29-second electric push rod, 30-inspection plate and 31-conductive pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
As shown in fig. 1-7, an automatic inspection equipment for defects of a PCB (printed circuit board), comprises a base 1, supporting legs 2 are fixedly installed at the bottom of the base 1, a workbench 3 is fixedly installed in the middle of the top of the base 1, guide rails 4 are arranged on two sides of the workbench 3, clamping mechanisms 5 are symmetrically arranged on the guide rails 4, the clamping mechanisms 5 are slidably connected with the guide rails 4, a first conveyor belt 6 and a second conveyor belt 7 are fixedly installed at two ends of the base 1, a support frame 8 is fixedly installed above the base 1, a third conveyor belt 9 is fixedly installed in the middle of the support frame 8, and an inspection mechanism 10 is fixedly installed at.
The one end of first conveyer belt 6 and the lateral wall laminating that workstation 3 is close to LED lamp plate 14 one side, the lateral wall laminating that the one end of second conveyer belt 7 and workstation 3 are close to 15 one sides of revolving stage, and the top surface height of first conveyer belt 6 and second conveyer belt 7 is less than the upper surface of workstation 3.
One end of the third conveyor belt 9 is arranged above the rotary table 15, one end of the third conveyor belt 9 close to the rotary table 15 is inclined downwards by 15-30 degrees, and the bottom surface of one end of the third conveyor belt 9 close to the rotary table 15 is higher than the upper surface of the workbench 3.
The guide rail 4 comprises a sliding groove 18, the sliding groove 18 is fixedly installed on the surfaces of the bases 1 on the two sides of the workbench 3, the length of the sliding groove 18 is larger than that of the workbench 3, a screw rod 19 penetrates through the sliding groove 18, the screw rod 19 is rotatably connected with the sliding groove 18, one end of the screw rod 19 is connected with the output end of a second motor 20, the second motor 20 is fixedly installed at the top of the base 1, a sliding seat 21 is fixedly installed on the screw rod 19, and the sliding seat 21 is in threaded fit with the screw rod 19.
Fixture 5 includes first electric putter 22, first electric putter 22's output fixed mounting ejector pad 23, the mounting hole has been seted up on ejector pad 23 surface, ejector pad 23 is kept away from first electric putter 22 one side and is equipped with ejector pad 24, ejector pad 24 passes through connecting rod 25 and ejector pad 23 sliding connection, connecting rod 25 one end and ejector pad 24 fixed connection, the connecting rod 25 other end runs through the mounting hole on the ejector pad 23, connecting rod 25 passes ejector pad 23 one end and is equipped with spacing lug, connecting rod 25 surface between ejector pad 23 and the ejector pad 24 is equipped with compression spring 26.
The first electric push rod 22 is fixedly arranged on the sliding seat 21, the output direction of the first electric push rod 22 is vertical to the screw rod 19, and the bottom of the clamping block 24 is attached to the upper surface of the workbench 3.
The inspection mechanism 10 comprises a fixing rod 27, the fixing rod 27 is horizontally and fixedly installed at the top of the support frame 8, a camera device 28 is fixedly installed in the middle of the bottom of the fixing rod 27, a second electric push rod 29 is fixedly installed on one side of the top of the fixing rod 27, the output end of the second electric push rod 29 vertically penetrates through the fixing rod 27, an inspection plate 30 is fixedly installed at the bottom end of the second electric push rod 29, and a plurality of conductive pins 31 are fixedly installed at the bottom of the inspection plate 30.
The working principle is as follows:
when the apparatus is used for PCB inspection, the PCB to be inspected is placed on the third conveyor belt 9, the PCB to be inspected is conveyed to the rotary table 15 through the third conveyor belt 9, the infrared position sensor is arranged on the supporting frame 8 above the rotary table 15, when the PCB falls into the rotary table 15, the rotary table 15 is driven to rotate by the first motor 17, so that the side edge of the PCB is parallel to the side edge of the workbench 3, then the second motor 20 drives the screw rod 19 to rotate, the screw rod 19 drives the sliding seat 21 to move along the screw rod when rotating, thereby the clamping mechanism 5 moves to the two sides of the PCB circuit board along the guide rail 4, then the first electric push rod 22 pushes the push block 23 to move towards the PCB, the push block 23 pushes the clamping block 24 to be attached to the side wall of the PCB through the compression spring 26, the clamping of the PCB is completed, then, the second motor 20 drives the screw rod 19 to rotate, so that the clamping mechanism 5 and the PCB move to the position above the LED lamp panel 14 to inspect the PCB;
when the PCB is inspected, the LED lamp panel 14 is firstly opened to irradiate the bottom of the PCB, the whole image of the PCB is shot by the camera device 28 and transmitted to a client for comparison, the appearance inspection of the PCB is completed, if the appearance inspection is unqualified, the second motor 20 drives the lead screw 19 to rotate so that the clamping mechanism 5 and the PCB move to the upper part of the second conveyor belt 7, the first electric push rod 22 drives the push block 23 to move so as to loosen the PCB, and the PCB falls on the second conveyor belt 7 to be recovered;
if the appearance inspection is qualified, the second electric push rod 29 pushes the inspection plate 30 to enable the conductive pins 31 to be in contact with the connectors on the PCB, the PCB is subjected to power-on inspection, if the power-on inspection is qualified, the second motor 20 drives the lead screw 19 to rotate to enable the clamping mechanism 5 and the PCB to move to the position above the first conveying belt 6, the first electric push rod 22 drives the push block 23 to move to loosen the PCB, the PCB falls into the first conveying belt 6 to be discharged, if the power-on inspection is unqualified, the second motor 20 drives the lead screw 19 to rotate to enable the clamping mechanism 5 and the PCB to move to the position above the second conveying belt 7, the first electric push rod 22 drives the push block 23 to move to loosen the PCB, and the PCB falls into the second conveying belt 7 to be recovered.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. The utility model provides a PCB circuit board defect automatic check out test set, its characterized in that, includes base (1), base (1) bottom fixed mounting supporting leg (2), fixed mounting workstation (3) in the middle of base (1) top, workstation (3) both sides are equipped with guide rail (4), the symmetry is equipped with fixture (5) on guide rail (4), fixture (5) and guide rail (4) sliding connection, base (1) both ends fixed mounting first conveyer belt (6) and second conveyer belt (7), base (1) top fixed mounting support frame (8), fixed mounting third conveyer belt (9) in the middle of support frame (8), support frame (8) top fixed mounting inspection mechanism (10).
2. The PCB circuit board defect automatic inspection apparatus of claim 1, the workbench (3) comprises a fixed plate (11), a first mounting groove (12) and a second mounting groove (13) are formed in the surface of the fixed plate (11), an LED lamp panel (14) is fixedly arranged in the first mounting groove (12), a rotary table (15) is fixedly arranged in the second mounting groove (13), an infrared position sensor is arranged on the supporting frame (8) above the turntable (15), a rotating shaft (16) is fixedly arranged at the bottom of the rotary table (15), the rotating shaft (16) is rotatably connected with the fixed plate (11), the bottom of the rotating shaft (16) is meshed with an output shaft of a first motor (17) through a gear, first motor (17) fixed mounting is in base (1) bottom, the top surface of LED lamp plate (14) and revolving stage (15) all flushes with the top surface of fixed plate (11).
3. The automatic defect inspection equipment for the PCB according to claim 2, wherein one end of the first conveyor belt (6) is attached to the side wall of the workbench (3) close to one side of the LED lamp panel (14), one end of the second conveyor belt (7) is attached to the side wall of the workbench (3) close to one side of the turntable (15), and the top surfaces of the first conveyor belt (6) and the second conveyor belt (7) are lower than the upper surface of the workbench (3).
4. The automatic defect inspection equipment for PCB circuit boards according to claim 2, wherein one end of the third conveyor belt (9) is arranged above the turntable (15), the end of the third conveyor belt (9) close to the turntable (15) is inclined downwards by 15-30 degrees, and the bottom surface of the end of the third conveyor belt (9) close to the turntable (15) is higher than the upper surface of the worktable (3).
5. The PCB circuit board defect automatic inspection equipment according to claim 1, wherein the guide rail (4) comprises a sliding groove (18), the sliding groove (18) is fixedly installed on the surface of the base (1) at two sides of the workbench (3), the length of the sliding groove (18) is larger than that of the workbench (3), a lead screw (19) penetrates through the sliding groove (18), the lead screw (19) is rotatably connected with the sliding groove (18), one end of the lead screw (19) is connected with the output end of a second motor (20), the second motor (20) is fixedly installed at the top of the base (1), a sliding seat (21) is fixedly installed on the lead screw (19), and the sliding seat (21) is in threaded fit with the lead screw (19).
6. The PCB circuit board defect automatic inspection apparatus of claim 5, the clamping mechanism (5) comprises a first electric push rod (22), the output end of the first electric push rod (22) is fixedly provided with a push block (23), the surface of the push block (23) is provided with a mounting hole, one side of the push block (23) far away from the first electric push rod (22) is provided with a clamping block (24), the clamping block (24) is connected with the push block (23) in a sliding way through a connecting rod (25), one end of the connecting rod (25) is fixedly connected with the clamping block (24), the other end of the connecting rod (25) penetrates through the mounting hole on the push block (23), the connecting rod (25) penetrates through one end of the push block (23) to be provided with a limiting bump, and a compression spring (26) is arranged on the surface of the connecting rod (25) between the push block (23) and the clamping block (24).
7. The PCB circuit board defect automatic inspection equipment according to claim 6, wherein the first electric push rod (22) is fixedly installed on the sliding seat (21), the output direction of the first electric push rod (22) is vertical to the screw rod (19), and the bottom of the clamping block (24) is attached to the upper surface of the workbench (3).
8. The automatic defect inspection equipment for PCB circuit boards as claimed in claim 1, wherein the inspection mechanism (10) comprises a fixing rod (27), the fixing rod (27) is horizontally and fixedly installed on the top of the supporting frame (8), the camera device (28) is fixedly installed in the middle of the bottom of the fixing rod (27), a second electric push rod (29) is fixedly installed on one side of the top of the fixing rod (27), the output end of the second electric push rod (29) vertically penetrates through the fixing rod (27), the bottom end of the second electric push rod (29) is fixedly installed with an inspection board (30), and a plurality of conductive pins (31) are fixedly installed on the bottom of the inspection board (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010634075.0A CN111781489A (en) | 2020-07-02 | 2020-07-02 | Automatic PCB defect inspection equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010634075.0A CN111781489A (en) | 2020-07-02 | 2020-07-02 | Automatic PCB defect inspection equipment |
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| CN111781489A true CN111781489A (en) | 2020-10-16 |
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| CN202010634075.0A Pending CN111781489A (en) | 2020-07-02 | 2020-07-02 | Automatic PCB defect inspection equipment |
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| CN117206623A (en) * | 2023-11-07 | 2023-12-12 | 昆山羿冠电子科技有限公司 | Welding device for PCB |
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Application publication date: 20201016 |