CN101424515B - Method for detecting sliding condition of microbit while drilling and detection device - Google Patents
Method for detecting sliding condition of microbit while drilling and detection device Download PDFInfo
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- CN101424515B CN101424515B CN2008102161623A CN200810216162A CN101424515B CN 101424515 B CN101424515 B CN 101424515B CN 2008102161623 A CN2008102161623 A CN 2008102161623A CN 200810216162 A CN200810216162 A CN 200810216162A CN 101424515 B CN101424515 B CN 101424515B
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Abstract
The utility model discloses a method and detecting device for checking the sliding situation when a microbit drills. The method for checking the sliding situation when the microbit drills comprises the following steps: A. when the microbit drills, high-speed photography is carried out on the microbit starting before the microbit drills and ending after the microbit drills; B. the images shot in the step A when the microbit drills are recorded and treated by quantification, so that the sliding data of the microbit is obtained, and is recorded and analyzed subsequently. As the high-speed photography is carried out on the microbit when the microbit drills, the method of the invention can record the sliding actions of the microbit in real time for analysis; therefore, the sliding situation ofthe microbit can be better obtained, and quantized data information is also gotten, so that the sliding data of the microbit can be conveniently analyzed and extracted according to the images shot when the microbit drills to further study on the sliding phenomenon of the microbit.
Description
Technical field
The present invention relates to the manufacturing field of printed circuit board (PCB), in particular, relate to a kind of method and pick-up unit of the sliding condition when detecting microbit and going into to bore.
Background technology
We use microbit (being called for short little brill) that printed circuit board (PCB) is holed usually, further to process.And in little brill machining sheet, it (is the wandering phenomenon that sliding phenomenon can take place usually.At present, the wandering phenomenon does not also have clear and definite Chinese academic noun to define, and can be summarized as little characteristic that pierces usually).Sliding phenomenon is meant: little be drilled in into before the brill in a flash, little drill bit distortion can be slided at drilled material surface, then promptly breaks in the drilled material and holes.
Because the existence of sliding phenomenon, when our processing circuit board, the degree that little brill slides is big more, and is just far away more from origin, and position, hole precision is just poor more, and there is certain influence in position, the hole precision of processing.Since we when processing printed circuit board to processing the accuracy requirement of position, hole be very high, we can accomplish very accurate in the location before little piercing, because this uncertainty of existence of the sliding phenomenon of little brill, but probably because of little existence that is drilled in the sliding phenomenon before the brill, distortion in a flash before going into to bore, drill bit slides into other positions to be gone into to bore, and the hole when causing little piercing is biased poor, and position, hole precision can not guarantee.In addition, little brill departs from positive usual coordinates to be gone into to bore, and is not vertical drilling in sheet material inside, also influential to the quality of boring; And, when the slip amplitude of little brill is excessive, may cause the breaking of rod because of offset distance is excessive in addition, as shown in Figure 1.
The phenomenon that drill bit slides at every turn is at random, research to this phenomenon all is to carry out theoretic reasoning from mechanics and dynamics two aspects usually at present, but all also do not draw the appearance reason of little brill sliding phenomenon and form rule, can not obtain the related data of concrete sliding phenomenon.At present, South Africa once had a university to do the experiment of going into to bore characteristic of the common drill bit of 1cm size, its method that adopts is by the shank fixed disc at common drill bit, by the displacement of infrared sensor (infrared sensorsystem) test disks, reach the purpose of indirect detection sliding phenomenon.But this method is not suitable for detecting the very little microbit of diameter: because the own quality of disk that is fixed on drill handle part is very big with respect to the very little microbit of quality, the result of detection is bigger with result difference in actual the use; Can only be fixed on from the cutting edge of microbit shank far away and be used for disk, therefore, the detected displacement of infrared sensor is different with little slip amplitude of boring reality, and testing result is accurate inadequately; In addition, because very little of microbit itself, because the limitation of infrared sensor accuracy of detection, can not accurately detect the sliding condition of microbit.Therefore, this scheme is inapplicable to the very little little brill of diameter.
Summary of the invention
For overcoming above-mentioned defective, technical matters to be solved by this invention provides a kind of method and pick-up unit of the sliding condition can detect microbit comparatively accurately and go into to bore the time.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of the sliding condition when detecting microbit and going into to bore may further comprise the steps:
A: when microbit goes into to bore, before go into boring from microbit, to microbit go into brill afterwards till, microbit is carried out high-speed photography;
B: the image the when microbit that photographs in the steps A is gone into to bore writes down and quantification treatment, obtains little brill slip data; And little brill slip data are write down and subsequent analysis.
In the described steps A, may further comprise the steps:
A1: the presser feet that is positioned at the microbit periphery on the rig main shaft with the microbit place is laid down or is not fallen by rig control program control presser feet;
A2: high-speed camera is aimed at microbit, microbit is carried out high-speed photography.Usually all be provided with the presser feet that is used to flatten sheet material to be processed owing to be positioned at the microbit periphery on the existing rig main shaft, microbit will carry out drilling work in presser feet, therefore want high-speed camera is directly aimed at microbit on the rig main shaft, need remove the presser feet of retaining between them just passable.
High-speed camera in the described steps A 2 is two ones, aims at microbit simultaneously from two angles respectively and carries out high-speed photography.
Described two high-speed cameras carry out high-speed photography from X, Y both direction to microbit; Described X, Y both direction all perpendicular to microbit go into to bore direction, and be mutually 90 degree respectively and distribute.
Among the described step B, the step that image when microbit is gone into to bore carries out subsequent analysis comprises: be mutually little brill slip data that image quantization that the high-speed cameras of 90 degree take obtains its place angle according to two camera angle, draw the two-dimentional trajectory diagram that drill bit slides, obtain the related data that microbit slides according to drawing the two-dimentional trajectory diagram that comes out.
A kind of pick-up unit of the sliding condition when being used to detect microbit and going into to bore comprises:
The end is fixed with the rig main shaft of microbit;
High-speed camera is used for when microbit goes into to bore microbit being carried out high-speed photography;
The shooting analysis module is connected with high-speed camera, and the image the when microbit that is used for that high-speed camera is photographed goes into to bore writes down and quantification treatment, obtains little brill slip data; And little brill slip data are write down and subsequent analysis.
Described high-speed camera is arranged on the position that can directly aim at the microbit on the rig main shaft, and described microbit is in the focal plane of high-speed camera; Described pick-up unit also is provided with the presser feet control module, is used to control the presser feet that is positioned at the microbit periphery and does not fall.Can remove the presser feet of retaining between high-speed camera and microbit in the mode that the presser feet of microbit periphery does not fall by presser feet control module control.
Described high-speed camera is two ones, aims at microbit simultaneously from two angles respectively and carries out high-speed photography.
It is on the axis of orientation of X, Y both direction of initial point that described two high-speed cameras are separately positioned on the microbit; Described X, Y both direction all perpendicular to microbit go into to bore direction, and be mutually 90 degree respectively and distribute.
Described shooting analysis module also comprises two-dimentional trajectory diagram drafting module, is used for being mutually little brill slip data that image quantization that the high-speed cameras of 90 degree take obtains its place angle according to two camera angle, draws the two-dimentional trajectory diagram that drill bit slides.
The present invention carries out high-speed photography owing to adopting to microbit when microbit goes into to bore, the method that real time record microbit sliding action is used to analyze, therefore, can well get access to the sliding condition of microbit, and the data message that obtains quantizing, so the image in the time of going into to bore according to the microbit that photographs is very easily analyzed, and extracts the data that microbit slides, and further studies with the sliding phenomenon to microbit.
Description of drawings
Fig. 1 is the synoptic diagram of the microbit sliding phenomenon of the embodiment of the invention;
Fig. 2 is the process flow diagram of the method for the sliding condition of the detection microbit of the embodiment of the invention when going into to bore;
Fig. 3 be the embodiment of the invention single high-speed camera be used to detect microbit and go into to bore the time the structural representation of pick-up unit of sliding condition;
Fig. 4 be the embodiment of the invention two high-speed cameras be used to detect microbit and go into to bore the time the structural representation of pick-up unit of sliding condition;
Fig. 5 is the mark synoptic diagram of coordinate axis of the microbit sliding phenomenon of the embodiment of the invention;
Fig. 6 is the synoptic diagram of the two-dimentional trajectory diagram of drawing out of the embodiment of the invention.
Wherein: 1, rig main shaft; 2, microbit; 3, sheet material to be processed; 4, high-speed camera.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
Sliding condition when going into to bore in order to detect microbit, we are no longer carrying out theoretic research aspect mechanics and the dynamics two, the image that slides takes place when adopting the method that flashy microbit before go into boring is carried out high-speed photography to write down microbit on the contrary to go into to bore, by quantification treatment, obtain the related data that analyzable microbit slides.
The method of the sliding condition when detection microbit of the present invention goes into to bore as Fig. 2, Fig. 3, shown in Figure 4, may further comprise the steps:
A: high-speed camera 4 is aimed at microbits 2, when microbit 2 goes into to bore, before going into to bore from microbit 2, after going into to bore to microbit 2 till, when piercing the generation sliding phenomenon, microbit 2 is carried out high-speed photography little;
B: the image the when microbit 2 that photographs in the steps A is gone into to bore writes down and quantification treatment, obtains little brill slip data; And little brill slip data are write down and subsequent analysis.
And being used to of realizing using in the above-mentioned detection method sliding condition when detecting microbit 2 and going into to bore pick-up unit as shown in Figure 3 and Figure 4, it comprises: rig main shaft 1, high-speed camera 4, with the shooting analysis module that is connected with high-speed camera 4 (i.e. PC among the figure); The end of rig main shaft 1 is fixed with microbit 2; High-speed camera 4, be used for microbit 2 treat that machining sheet 3 holes go into to bore before the time, microbit 2 is carried out high-speed photography, microbit 2 is in the focal plane of high-speed camera 4; The shooting analysis module is connected with high-speed camera 4, and the image the when microbit 2 that is used for that high-speed camera 4 is photographed goes into to bore writes down and quantification treatment, obtains little brill slip data; And little brill slip data are write down and subsequent analysis.
Because the velocity of rotation of microbit 2 is express, for the little brill of diameter below 0.2mm, the speed of mainshaft reaches more than 150,000 rev/mins (promptly 2500 revolutions per seconds) usually, can reach 300,000 rev/mins (promptly 5000 revolutions per seconds) for little brill of 0.1mm.Therefore, the high-speed camera 4 that we adopt herein, frame speed generally more than 10000fps (being that per second is clapped 10000 width of cloth pictures), the highest frame speed of taking 100,000 fps.We can only carry out high-speed photography by 4 pairs of microbits of a high-speed camera 2, record microbit 2 sliding condition in one direction, as shown in Figure 3.Sliding condition for omnibearing record microbit 2, we can use two high-speed cameras 4, it is mutually 90 degree respectively, and to be arranged on microbit 2 be on the axis of orientation of X, Y both direction of initial point, aim at microbit 2 simultaneously from two angles and carry out high-speed photography, as shown in Figure 4.High-speed camera 4 carries out high-speed photography from X, Y both direction to microbit 2; And be mutually the image that 90 high-speed cameras of spending 4 are taken according to two camera angle, can obtain little sliding trace that is drilled in the two dimension on the processing plane, and what draw out that drill bit slides is initial point with little brill anchor point, is the two-dimentional trajectory diagram (as shown in Figure 6) of coordinate axis with X, Y both direction.At this moment, the shooting analysis module also comprises two-dimentional trajectory diagram drafting module, is used for being mutually little brill slip data that image quantization that the high-speed cameras 4 of 90 degree take obtains its place angle according to two camera angle, draws the two-dimentional trajectory diagram that drill bit slides.
The method of the image quantization that photographs being handled and drawing two-dimentional trajectory diagram is as follows:
On X, Y both direction, determine true origin earlier respectively, and set up coordinate axis (as shown in Figure 5) according to true origin, the little brill sliding position that shows on the image of the frame frame when playing according to the high-speed camera on X and the Y direction 4, determine the slide displacement of little brill, be recorded on this coordinate axis, quantize to obtain little brill slip data of its place angle.Find out corresponding constantly little point corresponding on the X-Y plane that is drilled in according to the displacement of the both direction that obtains on the X of synchronization and the Y direction.Behind the point that the correspondence of the X-Y plane that all frames of finishing video recording show is slided, these matches are formed the two-dimentional trajectory diagram (as shown in Figure 6) that the little brill on the X-Y plane slides.
According to the two-dimentional trajectory diagram that draws obtain that microbit 2 slides such as slip amplitude solstics, little brill slip amplitude peak, little related data such as some offset distances that pierces, with for further analysis.
Sliding phenomenon when the drill bit of different model is holed on the sheet material to be processed 3 of differing texture is carried out the high-speed photography record and is analyzed, we can find slide bit model minimum, that position, hole precision is best, the pore-forming effect is best and corresponding sheet material to be processed by further analyzing.
In addition, because more existing rig main shafts 1 are provided with presser feet in microbit 2 peripheries, be used to flatten sheet material to be processed, avoid the uneven influence that causes boring procedure of sheet material to be processed when little brill is holed, microbit 2 carries out drilling work in presser feet.And during the sliding condition when detecting microbit 2 and go into to bore, the microbit 2 that high-speed camera 4 is directly aimed on the rig main shaft 1 could need be taken microbit 2, therefore, can make high-speed camera 4 be arranged on the position that directly to aim at the microbit 2 on the rig main shaft 1 by presser feet being laid down or not fallen by presser feet control module control presser feet.And because we are not the large batch of boring of needs as common processing PCB plate 3 materials, remove presser feet and can not cause too big influence to our boring procedure, be negligible fully.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the method for the sliding condition when detecting microbit and going into to bore is characterized in that, may further comprise the steps:
A: when microbit goes into to bore, before go into boring from microbit, to microbit go into brill afterwards till, microbit is carried out high-speed photography;
B: the image the when microbit that photographs in the steps A is gone into to bore writes down and quantification treatment, obtains little brill slip data; And little brill slip data are write down and subsequent analysis.
2. the method for a kind of sliding condition when detecting microbit and going into to bore as claimed in claim 1 is characterized in that, in the described steps A, may further comprise the steps:
A1: the presser feet that is positioned at the microbit periphery on the rig main shaft with the microbit place is laid down or is not fallen by rig control program control presser feet;
A2: high-speed camera is aimed at microbit, microbit is carried out high-speed photography.
3. the method for a kind of sliding condition when detecting microbit and going into to bore as claimed in claim 2 is characterized in that the high-speed camera in the described steps A 2 is two ones, aims at microbit simultaneously from two angles respectively and carries out high-speed photography.
4. the method for a kind of sliding condition when detecting microbit and going into to bore as claimed in claim 3 is characterized in that described two high-speed cameras carry out high-speed photography from X, Y both direction to microbit; Described X, Y both direction all perpendicular to microbit go into to bore direction, and be mutually 90 degree respectively and distribute.
5. the method for a kind of sliding condition when detecting microbit and going into to bore as claimed in claim 4, it is characterized in that, among the described step B, the step that image when microbit is gone into to bore carries out subsequent analysis comprises: be mutually little brill slip data that image quantization that the high-speed cameras of 90 degree take obtains its place angle according to two camera angle, draw the two-dimentional trajectory diagram that drill bit slides, obtain the related data that microbit slides according to drawing the two-dimentional trajectory diagram that comes out.
6. the pick-up unit of the sliding condition when being used to detect microbit and going into to bore is characterized in that, comprising:
The end is fixed with the rig main shaft of microbit;
High-speed camera is used for when microbit goes into to bore microbit being carried out high-speed photography;
The shooting analysis module is connected with high-speed camera, and the image the when microbit that is used for that high-speed camera is photographed goes into to bore writes down and quantification treatment, obtains little brill slip data; And little brill slip data are write down and subsequent analysis.
7. pick-up unit as claimed in claim 6 is characterized in that, described high-speed camera is arranged on the position that can directly aim at the microbit on the rig main shaft, and described microbit is in the focal plane of high-speed camera; Described pick-up unit also is provided with the presser feet control module, is used to control the presser feet that is positioned at the microbit periphery and does not fall.
8. pick-up unit as claimed in claim 6 is characterized in that, described high-speed camera is two ones, aims at microbit simultaneously from two angles respectively and carries out high-speed photography.
9. pick-up unit as claimed in claim 8 is characterized in that, it is on the axis of orientation of X, Y both direction of initial point that described two high-speed cameras are separately positioned on the microbit; Described X, Y both direction all perpendicular to microbit go into to bore direction, and be mutually 90 degree respectively and distribute.
10. pick-up unit as claimed in claim 9, it is characterized in that, described shooting analysis module also comprises two-dimentional trajectory diagram drafting module, be used for being mutually little brill slip data that image quantization that the high-speed cameras of 90 degree take obtains its place angle, draw the two-dimentional trajectory diagram that drill bit slides according to two camera angle.
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| CN2008102161623A CN101424515B (en) | 2008-09-18 | 2008-09-18 | Method for detecting sliding condition of microbit while drilling and detection device |
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| CN2008102161623A CN101424515B (en) | 2008-09-18 | 2008-09-18 | Method for detecting sliding condition of microbit while drilling and detection device |
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| CN101424515B true CN101424515B (en) | 2010-08-18 |
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| DE102010064107B4 (en) * | 2010-12-23 | 2012-12-27 | Hilti Aktiengesellschaft | Auxiliary device of a drilling machine and control method |
| CN105710414B (en) * | 2014-12-03 | 2019-02-19 | 北大方正集团有限公司 | Detection method, detection system and the drilling machine of drill configuration defect |
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Assignee: Shanghai Kaisier Electronic Co., Ltd. Assignor: Shenzhen Jingzhou Precision Technology Corp. Contract record no.: 2012310000008 Denomination of invention: Method for detecting sliding condition of microbit while drilling and detection device Granted publication date: 20100818 License type: Exclusive License Open date: 20090506 Record date: 20120116 |