CN111103525B - Method for quickly finding point of abnormal resistance value of carbon wire - Google Patents
Method for quickly finding point of abnormal resistance value of carbon wire Download PDFInfo
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- CN111103525B CN111103525B CN201911370029.8A CN201911370029A CN111103525B CN 111103525 B CN111103525 B CN 111103525B CN 201911370029 A CN201911370029 A CN 201911370029A CN 111103525 B CN111103525 B CN 111103525B
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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]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
- G01R31/2813—Checking the presence, location, orientation or value, e.g. resistance, of components or conductors
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Abstract
The invention discloses a method for quickly finding a point of a carbon wire with abnormal resistance, which is suitable for a carbon oil fly wire manufacturing process, and can be used for timely and quickly detecting, layering and repairing abnormal points when carbon resistance is abnormal, so that unnecessary scrapping of products in production is avoided, and the yield of the products in production is improved.
Description
Technical Field
The invention relates to a carbon oil flying line printed circuit board manufacturing method, which can quickly find out the abnormal position of carbon resistance value (such as a carbon oil plate pasted on an NB plate touch area), and timely maintain and process the abnormal plate to prevent the abnormal carbon resistance product from flowing out.
Background
The carbon oil type PCB in the printed circuit industry has high manufacturing difficulty, low yield and main abnormity: the carbon resistance is too large and the position point with abnormal resistance value cannot be found from the lower hand, so that the PCB cannot be repaired and scrapped. If the problem occurs in the assembly link of the PCB finished product, the signal output of the whole machine is poor or the whole machine is down.
Disclosure of Invention
The invention aims to provide a method for quickly finding a point when the resistance value of a carbon wire is abnormal, which can effectively detect the position of carbon resistance failure and maintain the qualified rate of carbon oil production to be more than 95%.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for quickly finding a point of a carbon wire with abnormal resistance value comprises the following steps:
step one, detecting by a testing machine to obtain an abnormal carbon oil PCB; the abnormal carbon oil PCB is provided with strip-shaped carbon wires;
placing the abnormal carbon oil PCB on a detection device, wherein the detection device comprises a visual detection system 21 and a resistance value detection and adjustment device in wireless connection with the visual detection system; the resistance value detection and adjustment device comprises a front and rear telescopic mechanism 1, the front and rear telescopic mechanism 1 is connected with a left and right telescopic mechanism 2, the left and right telescopic mechanism 2 is connected with a lifting mechanism 3, the lifting mechanism 3 is connected with a guide rail 4, a guide groove 5 is formed on the guide rail 4, the guide groove 5 is connected with a sliding plate 7 through a sliding block 6, the number of the sliding plates 7 is two, the sliding plate 7 is in threaded connection with a threaded rod 8, and a positive thread area 81 and a negative thread area 82 are formed on the threaded rod 8; one of the two sliding plates 7 is in the positive thread region 81, and the other is in the negative thread region 82; the threaded rod 8 is connected with a motor 9, the sliding plate 7 is connected with a conducting strip 10, and the conducting strip 10 is connected with a resistance meter 22 fixed on the guide rail 4;
step three, the vision detection system detects the strip-shaped carbon wires and the lengths of the strip-shaped carbon wires, the resistance detection and adjustment device controls the sliding plate 7 to move to two ends of each strip-shaped carbon wire, the resistance of each strip-shaped carbon wire is obtained through measurement, and the total average resistance of each strip-shaped carbon wire is obtained; if the average resistance value of the strip-shaped carbon wire exceeds a set threshold value, the strip-shaped carbon wire is an abnormal strip-shaped carbon wire; if the strip carbon line exceeds the set threshold value, sending other detection departments to detect if the strip carbon line exceeds the set threshold value;
thirdly, the visual detection system averagely divides the strip-shaped carbon wire into a plurality of sections, and the resistance detection adjusting device detects and calculates the average resistance of each section; if the average resistance value of a certain section exceeds +/-20% of the total average resistance value, the problem section is determined; adjusting the distance between the conducting strips 10 to be less than or equal to 2mm, then carrying out point detection on the problem section to obtain the average resistance value of each point, and detecting that the average resistance value of a point exceeds +/-20% of the total average resistance value, thus obtaining the problem point.
The method for rapidly finding the abnormal carbon wire resistance according to claim 1, wherein the resistance detection and adjustment device further comprises a flattening structure, the flattening structure comprises a pressing cylinder 11 connected to the guide rail 4, and a pressing block 12 is connected to the pressing cylinder 11.
In a further improvement, the pressing block 12 is a wedge-shaped pressing block.
In a further improvement, a is 20.
In a further improvement, b is 2 mm.
The further improvement comprises a fifth step of detecting the problem point, then lowering the pressing block 12 to flatten the problem point, then detecting, determining whether the average resistance of the point of the problem point exceeds +/-a% of the total average resistance, if not, completely correcting the problem point, if so, manually cutting the problem point, and if so, cutting the point of the problem point until the average resistance of the point of the problem point is +/-a% of the total average resistance.
And further improving the carbon oil PCB, namely detecting whether the total average resistance value of the strip-shaped carbon wires after the problem points are adjusted exceeds a set threshold value, if not, determining that the carbon oil PCB is qualified, and if so, manually cutting the printing ink at the problem points until the carbon oil PCB is qualified.
And the further improvement comprises a seventh step of archiving the repair records and then transferring the carbon oil PCB to a post-process.
9, the front and back telescopic mechanisms 1, the left and right telescopic mechanisms 2 and the lifting mechanism 3 are all cylinders or oil cylinders.
In a further improvement, the guide groove 5 is a T-shaped groove.
The invention has the technical effects that:
can effectively detect the position of carbon resistance defect, and the qualified rate of carbon oil production is maintained to be more than 95%.
Drawings
Fig. 1 is a general schematic of the present invention.
Fig. 2 is a schematic structural view of the chute.
Detailed Description
Example 1
A method for quickly finding a point of a carbon wire with abnormal resistance value comprises the following steps:
step one, detecting by a testing machine to obtain an abnormal carbon oil PCB (specifically an E/T abnormal carbon oil PCB); the abnormal carbon oil PCB is provided with strip-shaped carbon wires;
placing the abnormal carbon oil PCB on a detection device, wherein the detection device comprises a visual detection system 21 and a resistance value detection and adjustment device in wireless connection with the visual detection system; the resistance value detection and adjustment device comprises a front and rear telescopic mechanism 1, the front and rear telescopic mechanism 1 is connected with a left and right telescopic mechanism 2, the left and right telescopic mechanism 2 is connected with a lifting mechanism 3, the lifting mechanism 3 is connected with a guide rail 4, a guide groove 5 is formed on the guide rail 4, the guide groove 5 is connected with a sliding plate 7 through a sliding block 6, the number of the sliding plates 7 is two, the sliding plate 7 is in threaded connection with a threaded rod 8, and a positive thread area 81 and a negative thread area 82 are formed on the threaded rod 8; one of the two sliding plates 7 is in the positive thread region 81, and the other is in the negative thread region 82; the threaded rod 8 is connected with a motor 9, the sliding plate 7 is connected with a conducting strip 10, and the conducting strip 10 is connected with a resistance meter 22 fixed on the guide rail 4; the resistance value detection and adjustment device further comprises a flattening structure, the flattening structure comprises a pressing cylinder 11 connected to the guide rail 4, and the pressing cylinder 11 is connected with a pressing block 12.
Step three, the vision detection system detects the strip-shaped carbon wires and the lengths of the strip-shaped carbon wires, the resistance detection and adjustment device controls the sliding plate 7 to move to two ends of each strip-shaped carbon wire, the resistance of each strip-shaped carbon wire is obtained through measurement, and the total average resistance of each strip-shaped carbon wire is obtained; if the average resistance value of the strip-shaped carbon wire exceeds a set threshold value, the strip-shaped carbon wire is an abnormal strip-shaped carbon wire; if the strip carbon line exceeds the set threshold value, sending other detection departments to detect if the strip carbon line exceeds the set threshold value;
the visual detection system averagely divides the strip-shaped carbon wire into a plurality of sections, and the resistance detection adjusting device detects and calculates the average resistance of each section; if the average resistance value of a certain section exceeds +/-20% of the total average resistance value, the problem section is determined; adjusting the distance between the conducting strips 10 to be less than or equal to 2mm, then carrying out point detection on the problem section to obtain the average resistance value of each point, and detecting that the average resistance value of a point exceeds +/-20% of the total average resistance value, thus obtaining the problem point.
After the problem point is detected, the pressing block 12 descends to flatten the problem point, then detection is carried out, whether the average resistance of the point of the problem point exceeds +/-20% of the total average resistance value or not is determined, if not, the problem point is completely corrected, if yes, manual cutting is carried out on the problem point, and the average resistance of the point of the problem point is within +/-20% of the total average resistance value.
And step six, detecting whether the total average resistance value of the strip-shaped carbon wires after the problem points are adjusted exceeds a set threshold value, if not, determining that the carbon oil PCB is qualified, and if so, manually cutting the printing ink at the problem points until the carbon oil PCB is qualified.
And seventhly, archiving the repair records, and then transferring the carbon oil PCB to the post-process.
The above description is only one specific guiding embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention using this concept shall fall within the scope of the invention.
Claims (10)
1. A method for quickly finding a point when the resistance value of a carbon wire is abnormal is characterized by comprising the following steps:
step one, detecting by a testing machine to obtain an abnormal carbon oil PCB; the abnormal carbon oil PCB is provided with strip-shaped carbon wires;
placing the abnormal carbon oil PCB on a detection device, wherein the detection device comprises a visual detection system (21) and a resistance value detection and adjustment device in wireless connection with the visual detection system; the resistance value detection and adjustment device comprises a front and rear telescopic mechanism (1), the front and rear telescopic mechanism (1) is connected with a left and right telescopic mechanism (2), the left and right telescopic mechanism (2) is connected with a lifting mechanism (3), the lifting mechanism (3) is connected with a guide rail (4), a guide groove (5) is formed in the guide rail (4), the guide groove (5) is connected with a sliding plate (7) through a sliding block (6), the number of the sliding plate (7) is two, the sliding plate (7) is in threaded connection with a threaded rod (8), and a positive thread area (81) and a negative thread area (82) are formed in the threaded rod (8); one of the two sliding plates (7) is positioned in a positive thread area (81), and the other is positioned in a negative thread area (82); the threaded rod (8) is connected with a motor (9), the sliding plate (7) is connected with a conducting strip (10), and the conducting strip (10) is connected with a resistance meter (22) fixed on the guide rail (4);
thirdly, the vision detection system detects the strip-shaped carbon wires and the lengths of the strip-shaped carbon wires, the resistance detection and adjustment device controls the sliding plate (7) to move to two ends of each strip-shaped carbon wire, the resistance of each strip-shaped carbon wire is obtained through measurement, and the total average resistance of each strip-shaped carbon wire is obtained; if the total average resistance value of the strip-shaped carbon wires exceeds a set threshold value, the strip-shaped carbon wires are abnormal strip-shaped carbon wires; if the strip carbon line exceeds the set threshold value, sending other detection departments to detect if the strip carbon line exceeds the set threshold value;
the visual detection system averagely divides the strip-shaped carbon wire into a plurality of sections, and the resistance detection adjusting device detects and calculates the average resistance of each section; if the average resistance value of a certain section exceeds +/-a% of the total average resistance value, the section is a problem section; adjusting the distance between the conducting strips (10) to be less than or equal to b, then carrying out point detection on the problem section to obtain the average resistance value of each point, and detecting that the average resistance value of a point exceeds +/-a% of the total average resistance value, thus obtaining the problem point.
2. The method for rapidly finding the carbon wire resistance abnormality according to claim 1, wherein the resistance detection and adjustment device further comprises a flattening structure, the flattening structure comprises a pressing cylinder (11) connected to the guide rail (4), and the pressing cylinder (11) is connected with a pressing block (12).
3. The method for rapidly finding the abnormal carbon wire resistance according to claim 2, wherein the compact (12) is a wedge-shaped compact.
4. The method for quickly finding the abnormal carbon wire resistance according to claim 1, wherein a is 20.
5. The method for quickly finding the abnormal carbon wire resistance according to claim 1, wherein b is 2 mm.
6. The method for quickly finding the point of the carbon wire with the abnormal resistance value according to claim 2, further comprising a fifth step of detecting the problem point, lowering the pressing block (12) to flatten the problem point, and then detecting to determine whether the average resistance of the point of the problem point exceeds +/-a% of the total average resistance value, if not, the problem point is corrected completely, if so, manual cutting is carried out on the problem point, and the average resistance of the point of the problem point is within +/-a% of the total average resistance value.
7. The method for quickly finding the point of the abnormal resistance value of the carbon wire according to claim 6, further comprising a sixth step of detecting whether the total average resistance value of the strip-shaped carbon wire after the problem point is adjusted exceeds a set threshold value, if not, the carbon oil PCB is qualified, and if so, the ink at the problem point is manually cut until the carbon oil PCB is qualified.
8. The method for quickly finding the point with the abnormal carbon wire resistance value according to claim 7, further comprising a seventh step of archiving the repair record and then transferring the carbon oil PCB to a post-process.
9. The method for quickly finding the point of the carbon wire with the abnormal resistance according to claim 1, wherein the front and rear telescoping mechanisms (1), the left and right telescoping mechanisms (2) and the lifting mechanism (3) are all cylinders or oil cylinders.
10. The method for quickly finding the abnormal resistance of the carbon wire according to claim 1, wherein the guide groove (5) is a T-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370029.8A CN111103525B (en) | 2019-12-26 | 2019-12-26 | Method for quickly finding point of abnormal resistance value of carbon wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911370029.8A CN111103525B (en) | 2019-12-26 | 2019-12-26 | Method for quickly finding point of abnormal resistance value of carbon wire |
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| CN111103525A CN111103525A (en) | 2020-05-05 |
| CN111103525B true CN111103525B (en) | 2021-11-05 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2118015C3 (en) * | 1971-04-14 | 1973-12-06 | Gesellschaft Fuer Nuklear-Messtechnik Und Industrie-Elektronik M. Knuefelmann & Co Mbh., 5090 Leverkusen | Method for measuring resistance on electrical conductors |
| JPS5571034A (en) * | 1978-11-22 | 1980-05-28 | Toshiba Corp | Measuring method for resistance distribution of compound semiconductor single crystal |
| CN206832890U (en) * | 2017-06-23 | 2018-01-02 | 东旭科技集团有限公司 | Resistivity test device |
| CN207623410U (en) * | 2017-10-30 | 2018-07-17 | 群光电子(苏州)有限公司 | A kind of resistance measurement tooling |
| CN208060620U (en) * | 2018-03-28 | 2018-11-06 | 英利能源（中国）有限公司 | A kind of photovoltaic welding belt resistivity measurement device |
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