WO2013159333A1

WO2013159333A1 - Method for capturing image from surface of drill bit

Info

Publication number: WO2013159333A1
Application number: PCT/CN2012/074817
Authority: WO
Inventors: 邱博洪
Original assignee: 厚图科技有限公司
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2013-10-31

Abstract

A method for capturing an image from a surface of a drill bit, comprising the following steps: 1) placing a drill bit onto a rotary base for rotation; 2) making a charge-coupled device to emit a coaxial light using a coaxial optical lens to the surface of one side of the drill bit; 3) utilizing a moment when the rotary base rotates the drill bit by one distance unit, the charge-coupled device capturing an image of the lateral surface, as such, when the rotary base rotates the drill bit by multiple distance units, multiple continuous images of the surface of the drill bit are produced; 4) finding a characteristic part of each of the continuous images of the surface of the drill bit, and extracting parts having the characteristic to form another image; and, 5) composing each of the image having the characteristic parts into an expanded image.

Description

Method for capturing surface image of drill needle

The invention relates to a method for extracting a surface image of a drill needle, in particular to a method for synthesizing a plurality of continuous images of a drilled surface having a characteristic portion and forming a developed image. Background technique

The application of printed circuit boards (PCBs) is very extensive and even one of the main factors contributing to the third industrial revolution. Almost none of the food, clothing, housing, and travel in daily life is printed on the circuit board. In terms of food, a microwave oven that can heat or cook food; in terms of clothes, a washing machine that can wash clothes; in terms of living, it can illuminate indoor lamps; in terms of line, it can provide a car for passengers. Therefore, as mentioned above, all the tools that must be used every day in daily life must have printed circuit boards.

As the range of applications for printed circuit boards has increased, they have been added to multilayer boards from early single-layer boards. Thus, the circuit between the layers requires a connection line to allow the printed circuits of the layers to be electrically connected to each other. Therefore, these connecting lines running through the various layers are drilled through some extremely thin drill bits before they can penetrate between the layers. These tiny drill bits may be as small as the hair, so that small holes can be drilled for the printed circuit board to pass through. Therefore, the drill bit can also be called a drill. Based on the above requirements and applications, several key points can be drawn:

1. Large demand: Due to the wide application of printed circuit boards, the peripheral industries have also increased in proportion.

2. Accurate size: The reason is applied to the precision industry, so the various dimensions of the drill must be very precise.

Therefore, the accuracy of the drill must be very high before it is accurately drilled. If the precision is not enough and there is an error, the hole drilled will have a relatively large error, and it may cause the bit to break. Therefore, the precision of grinding the drill bit during production is very important.

In addition, due to the above two points, it is clear that there are many manufacturers who produce drill bits. Therefore, the different sizes of the burs of the different brands are slightly different, so it has already been carried out. Drill needles that need to be reworked after drilling, the angle of the spiral of the bur (or slope:) is different and the processing method is different. It is because the angle of the spiral of each of the labels of the label has a certain value, so when the diamond is ground and processed by a drill grinding system, the re-machining of the different brands of the drill needles is different. Although the difference in the angle of the spiral is very small, it has reached the point of "micron", but if the processing related information is not correctly set, many unusable drill pins will be produced. The above situation will be analyzed.

Please refer to FIG. 1 and FIG. 2, which are a front perspective view of a drill needle and an end view of a drill needle. As shown in FIG. 2, the end surface of the drill has a total of four polished surfaces after grinding, and is a first polished surface ^1, a second polished surface N, a third polished surface 0 and a fourth polished surface. P, wherein the first surface to be polished M is a region surrounded by a straight line A2B2, a curved line B2C1, a curved line C1D2, a curved line D2D3, and a straight line D3A2, and the second ground surface N is the straight line A2D3 a region surrounded by a curve D3E1, a straight line E1F1 and a straight line F1A2, the third ground surface 0 is surrounded by the straight line A2F1, a curve F1C1, a curve C1D2, a curve D2D3 and a straight line D3A2. The fourth polished surface P is a region surrounded by the straight line A2D3, a curved line D3D4, a straight line D4B2, and the straight line B2A2. Corresponding to Fig. 1, it can be understood that the first surface to be polished ^1, the second surface to be polished N, the third surface to be polished 0, and the fourth surface to be polished P are located at a position of the drill. Figure 1 further shows that a spiral S of the bur has an angle α. As mentioned above, the reworking method is different for different angles. If the processing method is not correct, the second polished surface and the fourth surface to be polished are incompletely processed, that is, the second surface to be polished. The straight line E1F1 cannot be parallel to the straight line A2D3, and the straight line D4B2 of the fourth polished surface 无法 cannot be parallel to the straight line A2D3, and the reason for its formation will be described below.

Please refer to FIG. 3A to FIG. 3D , which are a perspective view of the relative positions of the two end faces of the drill needle and the spiral pattern, a schematic view of the end face of the drill bit and the same spiral angle after processing, and FIG. 3 A comparison diagram of the end face of the drill having a larger spiral angle and a schematic view of the end face of the drill bit after machining and having a smaller spiral angle. As shown in FIG. 3A, the end surface has a first surface to be polished and a second surface to be polished, and has a spiral S of an angle α, wherein the first surface to be polished is a straight line Β2Β2 and a curve B2C1. A region surrounded by a curve C1D3, a curve D2D3, and a straight line D3A2. The second surface to be polished N is a region surrounded by the straight line A2D3, a curved line D3E1, a straight line E1F1, and a straight line F1A2. As shown in FIG. 3B, it is the same drill needle passing through a After the re-machining of the feed amount Y, the original second surface to be polished is retracted into a new second polished surface Ν', that is, a dotted line (red line) surrounded by a plurality of points A2, D3', ΕΓ and F1. The area, that is, the point E1 retreats to a point ΕΓ, the point D3 retreats to a point D3', so that the new straight line F1E1' is not parallel to the straight line A2D3, and the straight line F1E1 and the new straight line F1E1' produce an angle a, causing the so-called Small angle, in other words, the original first polished surface M retreats into a new first polished surface M', that is, a dotted line (; red line) region surrounded by a plurality of points A2, B2, CI' and D3', That is, point D3 retreats to a point D3', and point C1 retreats to a point Cl'. As shown in FIG. 3C, after a burr having an angle α′ of a larger spiral S′ is reworked by a feed amount ,, the original second polished surface is retracted into a new second quilt. Grinding surface Ν", that is, a plurality of points Α 2, D3" or E1" (point E1 of this example coincides with point D3" and a dotted line (red line:) surrounded by F1, that is, point E1 is retracted A little ΕΓ ', point D3 retreats to a point D3", so that the new line F1E1" will not be parallel with the line A2D3, the line F1E1 and the new line F1E1 "produce an angle b, causing the so-called small angle, or even, the original A surface M to be retracted back into a new first polished surface M", that is, a dotted line (red line) surrounded by a plurality of points A2, B2, CI" and D3", that is, point D3 retreats to a point D3 ", point C1 retreats to a little Cl". As shown in Fig. 3D, a burr with an angle α' of a smaller spiral S' is reprocessed after a feed amount ,, the original second The surface to be polished is retracted into a new second surface to be polished "", that is, a dotted line (red line:) surrounded by a plurality of points A2, D3"', ΕΓ" and F1, that is, point E1 is retracted to A little ΕΓ", point D3 back to a little D3"' Thus, the new straight line F1E1"' will not be parallel to the straight line A2D3, and the straight line F1E1 and the new straight line F1E1"' will produce an angle c, resulting in a so-called small angle, and even the original first polished surface M is retracted into a new one. The first polished surface M"', that is, the dotted line (red line) surrounded by a plurality of points A2, B2, CI'" and D3'", that is, the point D3 retreats to a point D3"', the point C1 retreats To a little Cl"'.

Please refer to FIG. 4, which is a standard angle, a large angle and a small angle of FIG. 3A to FIG. 3D. In this way, it can be understood that if the different spiral angles are not used in the correct rework mode, they will have to be reworked or produce reticle scrap that can no longer be used.

Therefore, when the used burs need to be reworked, if they are batch reprocessed, and there are many dies with different labels, it is necessary to confirm the spiral angle one by one, and then apply them appropriately. Reprocessing method. Of course, it is very difficult for such a large number of burs to quickly obtain the spiral angle of each bur.

In the prior art, the laser is a way to quickly confirm the angle of the spiral. but, The cost is too high, and it will be too costly for general reprocessing manufacturers. If the angle of the spiral of the cylindrical bur is measured by means of optical imaging, there will be a problem of depth of field due to the cylindrical relationship, and the focus cannot be in the same plane, and the measurement is not accurate. Please refer to FIG. 5A and FIG. 5B , which are schematic side views of a main structure of a drill and a top view of a pair of cylindrical drills for optical imaging. In the figure, a reference area Re is used to compare the orientations of FIGS. 5A and 5B, and the spiral S has a spiral groove S1 and a spiral groove peak S2, and the first line E10 is the spiral groove S1. An intersection line with the spiral groove peak S2, and a second edge line E11 is another intersection line when the spiral groove S1 and the spiral groove peak S2 extend to the right of the figure. Since this figure is a side view, when viewed from this orientation, when the first side line E10 and the second side line E11 extend to the left side of the figure, there will be two visual virtual intersection points F10, F10'_; At the same time, there will be another visual virtual intersection Fl l, Fi r , but in fact the four virtual intersections F10, F10, Fl l, Fl l do not exist, but also define the location of the node. When near the virtual intersection F10, the line segment F101F102 of the first line E10 is earlier, that is, closer to the reader, the line segment F10F103 is later, farther away from the reader, and when near the virtual intersection F10', the line segment F104F106 is earlier, that is, Closer to the reader, the line segment F105F10' is later, farther away from the reader; conversely, when near the virtual intersection F11, the line segment F114F11 is later, that is, farther away from the reader, the line segment F115F116 is closer to the front, closer to the reader, and when at the virtual intersection Near Fi r , the line segment F111F113 is the front, that is, closer to the reader, and the line segment F11'F112 is later, farther away from the reader (that is, the orientation of the optical imaging device 1 and the reader is the same as in FIG. 5B:). The F101, F102, F103, F104, F105, F106, Fl ll, F112, F113, F114, F115, and F116 shown in the figure are all reference points for the description. Furthermore, a distance between the two virtual intersections F10, Fi r is defined as the pitch W. As shown in FIG. 5B, a backlight module 3 emits a backlight P' to illuminate the drill D, and then focuses on the optical imaging device 1. However, a region DOF1 indicated in the figure is a range of ideal depth of field, that is, spanning the entire body of the drill D, and actually only another region DOF2 can be clearly imaged on the optical imaging device 1 after optical imaging. on. As illustrated in Fig. 5A, the line segment F101F102, the line segment F104F106, the line segment F111F113, the line segment and the line segment F115F116 can be clearly imaged on the optical imaging device 1, and the rest cannot. Therefore, the correct pixel cannot be obtained on the image. Therefore, measurements that have reached the "micron" level for such accuracy are not allowed.

So, how to develop a method of extracting the surface image of the drill, at a low cost There is a problem with depth of field in the prior art, which is an important topic that needs to be paid attention to by those who are currently familiar with related art. Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method for extracting a surface image of a drill needle, which can solve the problem of defocusing derived from depth of field at a low cost, and can accurately pick up the surface of the drill needle.

A method for capturing a surface image of a drill, comprising the steps of: 1) placing a drill pin in a rotating base for rotation; and transmitting a coaxial light to a charge coupling device by using a coaxial light lens One side surface of the drill needle; 3) when the rotary drill rotates the drill needle by a unit distance, the charge coupling device captures an image of the side surface, so that when the rotary seat rotates the plurality of unit distances of the drill needle, That is, a plurality of continuous images of the surface of the drill needle are generated; 4) finding a feature portion of a continuous image of each surface of the drill needle, and extracting a portion having the feature into another image; and 5) synthesizing each image having the characteristic portion Into an expanded map. DRAWINGS

Figure 1 is a front perspective view of a drill needle;

Figure 2 is a schematic side view of a drill needle;

Figure 3A is a perspective view showing the relative positions of the two end faces of the drill needle and the spiral pattern;

Figure 3B is a schematic view showing the end face of Figure 3A and the end face of the drill having the same spiral angle after processing;

Figure 3C is a schematic view showing the end face of Figure 3A and the end face of the drill having a larger spiral angle after machining;

Figure 3D is a schematic view of the end face of Figure 3A and the end face of the drill having a smaller spiral angle after machining;

4 is a schematic view of the standard angle, the large angle and the small angle of the end face of FIG. 3A to FIG. 3D; FIG. 5 is a top view of the spiral pattern of a pair of cylindrical drill needles taken optically; FIG. 5A is a main structural side of a drill needle Schematic diagram

Figure 5B is a top plan view showing optical pickup of a pair of cylindrical drill pins;

6 is a schematic top view of a related hardware position configuration required for a method for capturing a surface image of a drill according to the present invention;

Figure 7 is a diagram showing the steps of a method for capturing a surface image of a drill of the present invention; FIG. 8A is a continuous image view of a plurality of drill needle surfaces taken by the method for picking up a surface image of a drill according to the present invention; FIG.

8B is a synthetic development view of the method for extracting a surface image of a drill according to the present invention;

9A and FIG. 9B are corresponding positional comparison diagrams of a synthetic development view taken from a plurality of positions of the bur and a method for extracting a surface image of the bur according to the present invention;

Figure 10A is a perspective enlarged view of a flank angle of a drill needle;

Figure 10B is a schematic view showing a position of a rake face angle in comparison with Figure 9B;

Figure 10C is an enlarged view of the rake angle;

Figure 11A is a side perspective view of a drill needle;

Figure 11B is a front view of one end of the drill. Main component symbol description

M first ground surface

N second ground surface

0 third ground surface

P fourth ground surface

A2B2 straight line

B2C1 curve

C1D2 curve

D2D3 curve

D3A2 straight line

D3E1 curve

E1F1 straight line

F1A2 straight line

F1C1 curve

C1D2 curve

D2D3 curve

D3A2 straight line

D3D4 curve

D4B2 straight line s spiral angle

Α2 points

D3, point

El ' point

F1 point

ΕΓ point

D3, point

F1E1' line a angle

C1' point

S" spiral pattern

Angle

Υ Infeed

Ν" second ground surface

D3" point

E1" point

F1E1" straight line

b angle

M" first ground surface

S'" spiral pattern

'" angle

Ν'" second ground surface

D3,,, point

E1'" point

F1E1'" line c angle

Μ'" first ground surface

1 Optical imaging device Γ Optical imaging device

2 coaxial light 同轴 Coaxial light

D drill

F10 point

Fl l point

d distance difference

SI spiral groove

S2 spiral groove peak

E10 first side line

El l second side

Q fixed speed rotary seat w

1" coaxial light lens

181 continuous image of the surface of the drill

182 continuous image of the surface of the drill

1811 Features section

1821 Features section

18 expansion diagram

Point C

PX point

PY point

Θ1 angle

Θ2 angle

A10 area

A20 area

A30 area

刀 Knife face angle

RA segmentation

RB segmentation

RA' arc segment

RB' curved section

P' backlight Re reference area

F10 virtual intersection

F 10' virtual intersection

F11 virtual intersection

Fir virtual intersection

F101 reference point

F102 reference point

F103 reference point

F104 reference point

F105 reference point

F106 reference point

Fill reference point

F112 reference point

F113 reference point

F114 reference point

F115 reference point

F116 reference point

W pitch

3 backlight module

DOF1 area

DOF2 area

(1)~(5) Step number. detailed description

Please refer to FIG. 6 at the same time, which is a top view of a related hardware location configuration required for a method for capturing a surface image of a drill. As shown in FIG. 6, the drill D is fixed on the fixed speed rotating seat Q, and the fixed speed and the fixed direction are rotated; while the drill D of the figure is horizontally placed, and the other embodiment can also be placed vertically. Thus, in the figure, the drill D is represented by a "dot", but this figure does not show the vertical placement. The optical imaging device emits the coaxial light 2 to the drill D, Drilling pin D takes the image. A grinding device W is finished after taking the image, and knows the relevant information of the drilling D, such as the angle of the spiral, it can decide how to drill Needle D is further processed.

Please refer to FIG. 7, which is a step diagram of a method for capturing a surface image of a drill needle according to the present invention. The method for extracting the surface image of the drill includes the following steps:

1) Place the drill D on the fixed speed rotary seat Q to perform constant speed and fixed direction rotation;

2) using a coaxial optical lens 1" to transmit a coaxial light 2' to a side surface of the drill D;

3) When the fixed speed rotary seat Q is used to rotate the drill D-unit distance, the charge coupled device picks up an image of the side surface, so that the fixed speed rotary seat Q rotates the drill needle D by a plurality of unit distances. a continuous image of the plurality of drill surface surfaces, and the plurality of drill needle surface continuous images are a plurality of linear continuous images;

4) Finding the feature of the continuous image of each surface of the drill needle, and extracting the portion having the feature into another image, the feature portion is that the coaxial light is irradiated on the side surface of the drill needle, and is positively reflected Entering the bright spot portion generated by the charge coupled device; and

5) Combine images of the feature parts into a developed image by using the stitching technique.

Please refer to FIG. 8A and FIG. 8B , which are schematic diagrams of a plurality of drill needle surface images captured by the method for drawing a surface image of a drill needle according to the present invention, and a method for extracting a surface image of the drill needle according to the present invention. Synthetic expansion map. As shown in Fig. 8A, the two-needle surface continuous image views 181, 182 each have characteristic portions 1811, 1821, and the two feature portions 1811, 1821 are combined to form a developed view 18. From the developed view 18, the features of the surface of the drill D will be accurately presented without the problem of depth of field; on the other hand, the method disclosed by the present invention is extremely low in cost compared to laser.

Please refer to FIG. 9A and FIG. 9B , which are corresponding position comparison diagrams of a synthetic development view taken from multiple positions of the drill needle and the method for extracting the surface of the drill needle of the present invention. As can be seen from the figure, FIG. 9A shows four points A2, D3, El, Fl of the second surface to be polished N, and another point C additionally defined, wherein points El, D3, C can correspond to the figure. Three points in 9B El, D3, C. Therefore, from the solid perspective position of Fig. 9A, the position of each point in Fig. 9B can be clearly understood, and how to interpret Fig. 9B is understood.

By interpreting FIG. 9B, the position data to be read can be clearly found. For example, in the figure, taking two repetitions and two points PX and PY of the opposite part, the values of the two angles Θ1 and Θ2 can be obtained, and after averaging the two values and converting into the slope, the more precise spiral pattern can be further understood. Slope. Please refer to FIG. 10A, FIG. 10B and FIG. 10C, which are a flank angle of a drill needle A three-dimensional enlarged view, a schematic view of a rake angle position of an alignment and a magnified view of the same, wherein the three regions A10, A20, and A30 of FIG. 9B are aligned to FIG. 10B, and then refer to 10A and 10C, the exact information of the rake angle γ can be known. In addition, please refer to the segment RA, RB in FIG. 9A, and then to FIG. 11A and FIG. 11B, which are a side perspective view of a drill pin and a formal view of one end face of the drill pin, wherein the segment of FIG. 11A RA, RB may correspond to the segments RA, RB in Fig. 9B, and the arc segments RA' and RB' in Fig. 11B only show which corresponding arc segment is viewed from the direction of the end face, therefore, Fig. 11A The segments RA, RB are the same length as the segments RA, RB in Fig. 9B, and the length ratio is the groove ratio.

Therefore, from the above-mentioned synthetic development map, information on many sizes of a drill can be obtained, and the drill needles of different brands can be accurately and quickly interpreted. Thus, in a burr mill, the burs of different brands can be quickly interpreted to determine how to handle the burs in the next step. However, the method for extracting the surface image of the drill pin can accurately capture the image of the surface of the drill needle, and saves a lot of cost compared with the prior art using laser image capture, and can solve other problems in the prior art. Optical imaging has a depth of field that creates a problem of out of focus.

Thus, the patent application of the present invention utilizes the inventor's rich experience to design a simple but fully solveable problem of the prior art with a very creative idea. Therefore, the function of the patent application of the present invention does meet the patent requirements of novelty and inventiveness.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. It is to be understood that the scope of the present invention is to be construed as being limited by the scope of the present invention.

Claims

Claims:

1. A method of extracting a surface image of a drill, comprising the steps of:

1) placing a drill pin in a rotating base for rotation;

2) using a coaxial light lens to emit a coaxial light to a side surface of the drill pin;

3) When the rotary seat rotates the drill a unit distance, the charge coupling device draws an image on the side surface, so that when the rotary seat rotates the plurality of unit distances of the drill needle, multiple drill surface is generated. Continuous image

4) finding the feature portion of the continuous image on each surface of the bur and extracting the portion having the feature into another image;

5) Synthesize each image having a feature portion into an expanded view.

The method for extracting a surface image of a drill needle according to claim 1, wherein the plurality of drilled needle surface continuous images produced in step 3) are a plurality of linear continuous images.

The method for extracting a surface image of a drill needle according to claim 1 , wherein the characteristic portion of the continuous image of each of the drill needle surfaces in step 4) is that the coaxial light is irradiated on the drill needle After the side surface, it enters the bright spot portion generated by the charge coupled device with regular reflection.

The method for extracting a surface image of a drill according to claim 1, wherein in step 5), each image having a characteristic portion is synthesized into an unfolded view, and the plurality of characteristic portions are obtained by using a technique of the stitch pattern. The image is synthesized in the expanded view.

The method for extracting a surface image of a drill needle according to claim 1, wherein the slope information of the spiral thread of the drill needle is obtained from the development map in step 5).

The method for extracting a surface image of a drill needle according to claim 1, wherein the expansion angle of the drilling needle in step 5) is used to obtain information about a rake angle of the drill needle.

The method for extracting a surface image of a drill according to claim 1, wherein the groove ratio information of a spiral of the drill needle is obtained from the developed view in step 5).

The method for extracting a surface image of a drill needle according to claim 1, wherein in the step 1), the rotary seat is a rotating seat with a certain speed and orientation.