CN109632826A - The method for detecting the drill point degree of wear - Google Patents
The method for detecting the drill point degree of wear Download PDFInfo
- Publication number
- CN109632826A CN109632826A CN201811442903.XA CN201811442903A CN109632826A CN 109632826 A CN109632826 A CN 109632826A CN 201811442903 A CN201811442903 A CN 201811442903A CN 109632826 A CN109632826 A CN 109632826A
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- China
- Prior art keywords
- drill point
- measured
- completely new
- shade
- point
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Classifications
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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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
-
- 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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/954—Inspecting the inner surface of hollow bodies, e.g. bores
Abstract
The present invention relates to a kind of methods for detecting the drill point degree of wear, include the following steps: that S1, the shade generated to completely new drill point and drill point to be measured are compared, drill point bending to be measured is judged if the shade of drill point to be measured is wider than the shade of completely new drill point, it is impaired serious, step S2 is carried out if the equivalent width of the shade of the width and completely new drill point of the shade of drill point to be measured；S2, the heating rate of drill point to be measured and completely new drill point is detected and is compared, if heating rate differs larger, judge that bit wear to be measured carries out step S3 if heating rate is roughly the same beyond normal range (NR)；S3, the diameter to be drilled to drill bit to be measured and completely new drill bit and Hole Wall Roughness compare；The present invention can rapidly and accurately detect the degree of wear of drill point.
Description
Technical field
The present invention relates to the field PCB, in particular to a kind of method for detecting the drill point degree of wear.
Background technique
Since the demand of printed circuit board increases severely, the consumption of the micro- drill point of the used PCB of printed circuit board manufacturing industry
Correspondingly sustainable growth, with the development of electronic industry, printed circuit board develop to multi-layer board by original lamina.Pcb board
On connecting hole be common to each laminar substrate of connection, in the production procedure of pcb board, hole machined is very important process, drilling
Quality directly affect the final mass of pcb board, the hole of multi-layer PCB board is generally using machining, due to the abrasion of micro- drill point
The Hole Wall Roughness for being processed hole can be made to increase, bring a series of problems to the processes such as installation and subsequent plating, it is therefore desirable to
A kind of method that can quickly detect the drill point degree of wear, to replace the drill point that abrasion exceeds allowed band in time.
Summary of the invention
Based on this, it is necessary to provide a kind of method for detecting the drill point degree of wear, include the following steps:
S1, a completely new drill point and drill point to be measured are selected, selects one piece of useless circuit board, and two drill points are arranged in useless circuit board
At the sustained height of side, an incandescent lamp bulb is placed in the front of plane where completely new drill point and drill point to be measured, and make incandescent lamp
Steep it is consistent at a distance from completely new drill point and drill point to be measured, two drill points are irradiated and be heated, in completely new drill point and to be measured
One piece of blank parallel with the plane is arranged in the rear of plane where drill point, for showing completely new drill point and drill point to be measured in white heat
The shade generated under light irradiation rotates completely new drill point and drill point to be measured, observe completely new drill point and drill point to be measured on blank at
Shadow situation, the shade generated to completely new drill point and drill point to be measured compares, if the shade of drill point to be measured is wider than completely new drill point
Shade then judges drill point bending to be measured, is damaged seriously, if the width of the shade of the width of the shade of drill point to be measured and completely new drill point
It is consistent then carry out step S2；
The drill point to be measured of rotation and completely new drill point are projected on blank by incandescent lamp, it is neat edge can be obtained on blank
Rectangle shade, by measuring the width of the shade and comparing, it can be determined that whether drill point is bent.
S2, completely new drill point and drill point to be measured synchronize move down bore operation carried out to useless circuit board, until drill useless circuit board,
The heating rate of real-time monitoring completely new drill point and drill point to be measured in completely new drill point and drill point going down process to be measured, and record, if
The heating rate of drill point to be measured is higher than the 110% of the heating rate of completely new drill point, then judges the abrasion of drill point to be measured beyond permission model
It encloses, carries out step S3 if the heating rate of drill point to be measured is less than 110% of the heating rate higher than completely new drill point；
Wherein, if drill point is worn, more heats can be generated when drilling, the heating rate of drill point faster, passes through incandescent lamp
Drill point to be measured and completely new drill point can be increased in boring procedure by being irradiated to drill point to be measured, completely new drill point and useless circuit board
Heating rate so that drill point to be measured and completely new drill point are drilling the temperature change width in this section of the useless circuit board shorter time
Spend it is larger, convenient for measurement；Drill point to be measured and complete set drill point are heated by incandescent lamp bulb simultaneously, expand the abrasion of drill point
Influence for borehole temperature measures the time used to reduce, while can be reduced the abrasion of drill point in measurement process.
In addition, incandescent lamp bulb can be used for the light source in step S1 while as heat source, can effectively save detection at
This.
The aperture in the hole drilled to completely new drill point and drill point to be measured measures and records after the completion of S3, drilling, if to
The bore diameter of survey drill point is greater than the diameter of the drilling of completely new drill point, then judges that the abrasion of drill point to be measured exceeds allowed band, if
Diameter unanimously then carries out step S4；
S4, slicing treatment is carried out to useless circuit board, drilled hole is cut to half bore, and detect completely new drill point and drill point pair to be measured
The roughness and record for answering half bore judge if roughness of the roughness greater than the drilling of completely new drill point of the drilling of drill point to be measured
Drill point to be measured abrasion exceeds allowed band, cannot be used continuously, if roughness unanimously if judge the abrasion of drill point to be measured without departing from
In allowed band, it can continue to use.
Preferably, the distance between the completely new drill point and drill point to be measured are 20cm, the blank and described completely new
Drill point and drill point to be measured where plane distance be 5cm.
Further, in step S1, the width of the lower semisection of its shade is measured when measuring the width of the shade of drill point to be measured,
And the width for measuring the corresponding position of the shade of corresponding completely new drill point compares.
If the curved position of drill point to be measured when if lower semisection, do not have to the width of the top half of the shade of drill point to be measured
Have an impact, it is therefore desirable to measure the width of the lower semisection of the shade of drill point to be measured, preferably measure the intersection of apex point and drill body
Width.
Further, in step S1, the width of the shade of drill point to be measured and the width portion of the shade of completely new drill point are more than
1cm is then judged as equivalent width.
Preferably, in step S3, the aperture of the drilling of drill point to be measured is differed with the aperture of the drilling of completely new drill point to be no more than
The allowable error value of the drill point of the diameter is judged as that diameter is consistent.
Preferably, in step S4, roughness concentration is carried out using side wall of the roughmeter to drilling, if the brill of drill point to be measured
The roughness value difference of the drilling of hole and completely new drill point is no more than 5%, then is judged as that roughness is consistent.
The principle of the present invention, effect are further illustrated below with reference to above-mentioned technical proposal:
The present invention is successively detected by the quality of bending degree to drill point, heating rate and pore-forming, and detection project is comprehensive,
Testing result is accurate, and the drill point of noticeable wear can be preferentially excluded according to relatively simple detection mode, without to all
Drill point carries out drilling operation, can effectively deduct a percentage under the premise of guaranteeing the accuracy of detection structure and detect speed.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, below in conjunction with embodiment, the invention will be described in further detail:
Embodiment 1
A method of the detection drill point degree of wear includes the following steps:
S1, a completely new drill point and drill point to be measured are selected, selects one piece of useless circuit board, and two drill points are arranged in useless circuit board
At the sustained height of side, an incandescent lamp bulb is placed in the front of plane where completely new drill point and drill point to be measured, and make incandescent lamp
Steep it is consistent at a distance from completely new drill point and drill point to be measured, two drill points are irradiated and be heated, in completely new drill point and to be measured
One piece of blank parallel with the plane is arranged in the rear of plane where drill point, for showing completely new drill point and drill point to be measured in white heat
The shade generated under light irradiation rotates completely new drill point and drill point to be measured, observe completely new drill point and drill point to be measured on blank at
Shadow situation, the shade generated to completely new drill point and drill point to be measured compares, if the shade of drill point to be measured is wider than completely new drill point
Shade then judges drill point bending to be measured, is damaged seriously, if the width of the shade of the width of the shade of drill point to be measured and completely new drill point
It is consistent then carry out step S2；
S2, completely new drill point and drill point to be measured synchronize move down bore operation carried out to useless circuit board, until drill useless circuit board, complete
The heating rate of real-time monitoring completely new drill point and drill point to be measured in new drill point and drill point going down process to be measured, and record, if to be measured
The heating rate of drill point is higher than the 110% of the heating rate of completely new drill point, then judges that the abrasion of drill point to be measured exceeds allowed band,
Step S3 is carried out if the heating rate of drill point to be measured is less than 110% of the heating rate higher than completely new drill point；
The aperture in the hole drilled to completely new drill point and drill point to be measured measures and records after the completion of S3, drilling, if brill to be measured
The bore diameter of needle is greater than the diameter of the drilling of completely new drill point, then judges the abrasion of drill point to be measured beyond allowed band, if diameter
It is consistent then carry out step S4；
S4, slicing treatment is carried out to useless circuit board, drilled hole is cut to half bore, and detect completely new drill point and drill point pair to be measured
The roughness and record for answering half bore judge if roughness of the roughness greater than the drilling of completely new drill point of the drilling of drill point to be measured
Drill point to be measured abrasion exceeds allowed band, cannot be used continuously, if roughness unanimously if judge the abrasion of drill point to be measured without departing from
In allowed band, it can continue to use.
Embodiment 2
A method of the detection drill point degree of wear includes the following steps:
S1, a completely new drill point and drill point to be measured are selected, selects one piece of useless circuit board, and two drill points are arranged in useless circuit board
At the sustained height of side, the distance between completely new drill point and drill point to be measured are 20cm, in completely new drill point and drill point to be measured
An incandescent lamp bulb is placed in the front of place plane, and keeps incandescent lamp bulb consistent at a distance from completely new drill point and drill point to be measured, with
Two drill points are irradiated and are heated, is arranged one piece at the rear of plane where completely new drill point and drill point to be measured and is put down with the plane
Capable blank, for showing completely new drill point and the drill point to be measured shade that generates under incandescent lamp irradiation, the blank and described complete
The distance of plane is 5cm where new drill point and drill point to be measured, rotates completely new drill point and drill point to be measured, observe completely new drill point and
Drill point to be measured on blank at shadow situation, the shade generated to completely new drill point and drill point to be measured compares, if drill point to be measured
Shade lower semisection be wider than completely new drill point shade corresponding position width, then judge drill point to be measured bending, be damaged tight
Weight carries out step S2 if the equivalent width of the shade of the width and completely new drill point of the shade of drill point to be measured；
S2, completely new drill point and drill point to be measured synchronize move down bore operation carried out to useless circuit board, until drill useless circuit board, complete
The heating rate of real-time monitoring completely new drill point and drill point to be measured in new drill point and drill point going down process to be measured, and record, if to be measured
The heating rate of drill point is higher than the 110% of the heating rate of completely new drill point, then judges that the abrasion of drill point to be measured exceeds allowed band,
Step S3 is carried out if the heating rate of drill point to be measured is less than 110% of the heating rate higher than completely new drill point；
The aperture in the hole drilled to completely new drill point and drill point to be measured measures and records after the completion of S3, drilling, if brill to be measured
The diameter that the bore diameter of needle is greater than the drilling of completely new drill point is more than 1cm, then judges that the abrasion of drill point to be measured exceeds allowed band,
Step S4 is carried out if diameter is less than 1cm；
S4, slicing treatment is carried out to useless circuit board, drilled hole is cut to half bore, and detect completely new drill point and drill point pair to be measured
The roughness and record of half bore are answered, if the roughness that the roughness of the drilling of drill point to be measured is greater than the drilling of completely new drill point is more than
5%, then judge that drill point abrasion to be measured beyond allowed band, cannot be used continuously, judges if roughness difference is less than 5% to be measured
The abrasion of drill point can be continued to use without departing from allowed band.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of method for detecting the drill point degree of wear, which comprises the steps of:
S1, a completely new drill point and drill point to be measured are selected, selects one piece of useless circuit board, and two drill points are arranged in useless circuit board
At the sustained height of side, an incandescent lamp bulb is placed in the front of plane where completely new drill point and drill point to be measured, and make incandescent lamp
Steep it is consistent at a distance from completely new drill point and drill point to be measured, two drill points are irradiated and be heated, in completely new drill point and to be measured
One piece of blank parallel with the plane is arranged in the rear of plane where drill point, for showing completely new drill point and drill point to be measured in white heat
The shade generated under light irradiation rotates completely new drill point and drill point to be measured, observe completely new drill point and drill point to be measured on blank at
Shadow situation, the shade generated to completely new drill point and drill point to be measured compares, if the shade of drill point to be measured is wider than completely new drill point
Shade then judges drill point bending to be measured, is damaged seriously, if the width of the shade of the width of the shade of drill point to be measured and completely new drill point
It is consistent then carry out step S2；
S2, completely new drill point and drill point to be measured synchronize move down bore operation carried out to useless circuit board, until drill useless circuit board, complete
The heating rate of real-time monitoring completely new drill point and drill point to be measured in new drill point and drill point going down process to be measured, and record, if to be measured
The heating rate of drill point is higher than the 110% of the heating rate of completely new drill point, then judges that the abrasion of drill point to be measured exceeds allowed band,
Step S3 is carried out if the heating rate of drill point to be measured is less than 110% of the heating rate higher than completely new drill point；
The aperture in the hole drilled to completely new drill point and drill point to be measured measures and records after the completion of S3, drilling, if brill to be measured
The bore diameter of needle is greater than the diameter of the drilling of completely new drill point, then judges the abrasion of drill point to be measured beyond allowed band, if diameter
It is consistent then carry out step S4；
S4, slicing treatment is carried out to useless circuit board, drilled hole is cut to half bore, and detect completely new drill point and drill point pair to be measured
The roughness and record for answering half bore judge if roughness of the roughness greater than the drilling of completely new drill point of the drilling of drill point to be measured
Drill point to be measured abrasion exceeds allowed band, cannot be used continuously, if roughness unanimously if judge the abrasion of drill point to be measured without departing from
In allowed band, it can continue to use.
2. it is according to claim 1 detection the drill point degree of wear method, which is characterized in that the completely new drill point and to
The distance between drill point of survey is 20cm, and the blank is at a distance from plane where the completely new drill point and drill point to be measured
5cm。
3. the method for the detection drill point degree of wear according to claim 2, which is characterized in that in step S1, measure to be measured
The width of the lower semisection of its shade is measured when the width of the shade of drill point, and measures the corresponding position of the shade of corresponding completely new drill point
Width compare.
4. the method for the detection drill point degree of wear according to claim 2, which is characterized in that in step S1, drill point to be measured
The width of shade and the width portion of shade of completely new drill point be more than 1cm, then be judged as equivalent width.
5. the method for the detection drill point degree of wear according to claim 1, which is characterized in that in step S3, drill point to be measured
The aperture of drilling differ the allowable error value of drill point no more than the diameter with the aperture of the drilling of completely new drill point and be judged as
Diameter is consistent.
6. the method for the detection drill point degree of wear according to claim 1, which is characterized in that in step S4, use is coarse
It spends instrument and roughness concentration is carried out to the side wall of drilling, if the roughness value difference of the drilling of the drilling and completely new drill point of drill point to be measured
No more than 5%, then it is judged as that roughness is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811442903.XA CN109632826A (en) | 2018-11-29 | 2018-11-29 | The method for detecting the drill point degree of wear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811442903.XA CN109632826A (en) | 2018-11-29 | 2018-11-29 | The method for detecting the drill point degree of wear |
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| CN109632826A true CN109632826A (en) | 2019-04-16 |
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| CN201811442903.XA Pending CN109632826A (en) | 2018-11-29 | 2018-11-29 | The method for detecting the drill point degree of wear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111832562A (en) * | 2020-07-16 | 2020-10-27 | 哈尔滨市科佳通用机电股份有限公司 | Spring supporting plate fault identification method based on image processing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111832562A (en) * | 2020-07-16 | 2020-10-27 | 哈尔滨市科佳通用机电股份有限公司 | Spring supporting plate fault identification method based on image processing |
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Effective date of abandoning: 20211026 |