TW201315568A - Drill bit grinding system and drill bit grinding method - Google Patents

Abstract

A drill bit grinding method capable of accurately performing grinding, comprising: (1) grinding a drill bit mounted on a drill bit holder to define the height of an imaginary wire between the centers of circle of two grinders on a base; (2) performing a positioning operation to align the height of the central line of the drill bit to the height of the imaginary wire to define the standard height of the drill bit holder, the base or the grinders; (3) mounting another drill bit to be ground on the drill bit holder and detecting the height of the central line of the another drill bit according to the standard height; (4) performing a calibration operation to align the height of the central line of the another drill bit to the height of the imaginary wire; (5) grinding the another drill bit; and (6) determining whether there is any drill bit to be re-ground, and if yes, performing steps (3) to (5).

Description

Grinding bit system and method of grinding bit

The present invention relates to a method for grinding a drill bit system and a grinding bit, and more particularly to a system and method for grinding a drill bit with a high precision abrasive surface.

As the application range of printed circuit boards increases, from the early single-layer boards to multi-layer boards, the circuits between the layers need to have connection lines 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. 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 surrounding industries have also increased in proportion.

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

Therefore, before the drill bit is accurately drilled, its own precision must also be very high. 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.

Various types of drill grinding devices with different functions and designs have been proposed in the prior art, such as the new patent No. M415018 issued by the applicant and the patent applications 100119767 and 100131638 proposed by the applicant. All of which are incorporated herein by reference), however, there are still areas for improvement and optimization in use.

As shown in Fig. 6, normally, a bit holder 21 holds a drill bit 9a, and a bracket 210 supports a grinding portion 90 of the drill bit 9a to maintain the height h of the center line of the drill bit 9a with the second grinding wheel 120a. The height H of the imaginary connecting line L between the centers of 120b is the same, and one end surface 90a of the polishing portion 90 is a grinding place. During the actual grinding, the end surface 90a directly contacts the two grinding surfaces 1200a, 1200b of the grinding wheel 120a, 120b. Therefore, after multiple grindings, h will not equal H.

As shown in Fig. 7, the height h of the center line of the drill 9a is lower than the height H of the imaginary connecting line L. After the grinding, the point A6 and the point A7 do not intersect at one point, that is, the second polishing surface T2 (described in detail later) and the fourth polishing surface T4 (described in detail later) have no intersection, and the industry refers to separation.

As shown in Fig. 8, the height h of the center line of the drill 9a is higher than the height H of the imaginary connecting line L. After the grinding, the point A6 and the point A7 do not intersect at one point, that is, the second polishing surface T2 and the fourth polishing surface T4 each have a line segment A6A7 which is the intersection of each other, and the industry refers to the overlap.

Regardless of the above or below, if the difference between h and H is 1 μm, the bit holder 21 is rotated 180 degrees after the first polishing surface T1 (described in detail later) and the second polishing surface T2 are formed in the grinding process. Then, grinding further produces a third polishing surface T3 (described in detail later) and a fourth polishing surface T4. Therefore, the error of the two sides of the second polishing surface T2 and the fourth polishing surface T4 is 2 μm, and this error is not satisfactory for the hole in the drill PCB.

Moreover, the machine for grinding a drill bit has two grinding wheels 120a, 120b, In addition, other matching tools, such as the drive unit, the base, the wheel holder, etc., are very heavy overall. Under this condition, the error of the grinding wheels 120a, 120b can hardly be adjusted. The reason is as follows: as shown in Fig. 9, when the grinding wheel 120b on the left side is displaced by a distance d so that the grinding wheel 120b is retracted by 1 μm to the position of the broken line in the figure, the height H of the imaginary connecting line L is raised by a height value r (r). =2.801μm); as shown in Fig. 10, the grinding wheel 120a on the right side is displaced by a distance d', and the grinding wheel 120a is advanced by 1 μm to the position of the broken line in the figure, and the height H of the imaginary connecting line L is raised by a height value. r' (r' = 3.165 μm). The calculation formula of the height value r, r' is: r, r' = the amount of movement of the grinding wheel / [tan (∠ right grinding wheel) - tan (∠ left grinding wheel)] × cos (∠ moving wheel)

It is understood from the seventh to tenth drawings that the amount of separation/overlap of 2 μm is corrected, and only the movement amount of the virtual connection line L can be adjusted by 1 μm. However, if the left grinding wheel 120b is to be mechanically adjusted, only the movement amount of 0.357 μm can be adjusted, and the calculation formula is: [tan (∠ right grinding wheel)-tan (∠ left grinding wheel)] × cos (∠ left grinding wheel) × left The vertical distance the grinding wheel moves (as shown in Figure 9, the vertical distance d, which is 1 μm).

As can be seen from the above, since the amount of movement (i.e., 0.357 μm) is extremely small, it is extremely difficult to use the current mechanical method (such as finger movement), that is, the error of the grinding wheel 120a, 120b can hardly be adjusted.

Therefore, how to overcome various problems in the prior art has become a problem that is currently being solved.

The main object of the present invention is to provide a method for grinding a drill bit system and a grinding bit to judge the separation or overlapping of the grinding surface of the drill bit, and to correct the height of the center line of the drill bit to grind the grinding with high precision. Drill bit.

The invention provides a method for grinding a drill bit, comprising: (1) grinding a drill bit mounted on a drill bit to define a height of one of the imaginary connecting lines between the centers of the two grinding wheels disposed on the body; (2) Positioning operation such that the height of the center line of the drill bit is the same as the height of the imaginary connecting line to define the standard height of the bit holder, the seat body or the grinding wheel; (3) installing another drill bit to be ground In the bit holder, and detecting the height of the center line of the other bit according to the standard height; (4) correcting the operation so that the height of the center line of the other bit is the same as the height of the imaginary connecting line; (5) grinding the Another drill bit; and (6) determine if there are other drill bits to be ground, and if so, perform steps (3) through (5).

The present invention provides a grinding bit system comprising: a grinding wheel carrying device comprising a body, a first grinding wheel and a second grinding wheel disposed on the seat body, the first grinding wheel having a first grinding surface and The first grinding surface is located at a first center of the same side, and the second grinding wheel has a second grinding surface and a second center on the same side as the second polishing surface, and the first center and the second center The imaginary connection is defined as an imaginary connecting line, and the grinding wheel carrying device moves reciprocally along the direction of the imaginary connecting line; a drill advance and retreat device rotates the drill bit in a rotating manner, and the drill advance and retreat device comprises at least two The bit holder for fixing the drill bit, when one of the bit holders is moved to the first and second grinding wheels for grinding, the other bit holders will be located in a preliminary preparation And a calibration device for monitoring and adjusting the drilled or to-be-polished drill bit fixed to the drill bit holders; and when grinding a drill bit, using the adjustment device for correction to make the drill bit The height of the centerline is the same as the height of the imaginary link to define a standard height at which the drill bit system is aligned for subsequent grinding of other drill bits.

1A and 1B are perspective views of two embodiments of the drill grinding system of the present invention. The drill grinding system includes a grinding wheel carrier device 1, a drill bit advance and retreat device 2, a calibration device 3, and an inlet and outlet device 4.

The grinding wheel carrier device 1 includes a body (in this case, a combination of a base 11 and a wheel base 12), a first driving device 13 and a second driving device 14, and the wheel housing 12 is mounted thereon. The first grinding wheel 121 and the second grinding wheel 122 are arranged on the upper surface 11a of the base 11 and the first grinding wheel 121 and the second grinding wheel 122 are arranged on the imaginary long axis Y of the upper surface 11a of the base 11. The first and second grinding wheels 121, 122 are driven separately from the second driving devices 13, 14.

The main difference between the two embodiments is the structure of the wheel base 12, as shown in Fig. 1A, the wheel base 12 simultaneously carries the first and second grinding wheels 121, 122, and the two wheel bases 12 as shown in Fig. 1B. The first and second grinding wheels 121, 122 are respectively carried.

In the embodiment, the first grinding wheel 121 has a first polishing surface 121a and a first center A on the same side as the first polishing surface 121a, and the second grinding wheel 122 has a second polishing surface 122a and With the second grinding The surface 122a is located at a second center B of the same side, and the first center A and the second center B are imaginarily connected to each other and defined as an imaginary connecting line AB such that the imaginary connecting line AB is parallel to the imaginary long axis Y.

Moreover, the first and second grinding surfaces 121a, 122a respectively exhibit a tilt of the first angle α and a tilt of the second angle β with respect to the upper plane 11a of the base 11, and the first angle α is smaller than the second angle β. .

Further, the grinding wheel carrier 1 can be reciprocally moved in the direction of the imaginary long axis Y (i.e., the imaginary connecting line AB) by a drive shaft 15.

The drill advancing and retracting device 2 includes a rotating mechanism 20, a first bit seat 21a and a second bit seat 21b disposed on the rotating mechanism 20, to be mounted on the rotating mechanism 20 The two bit holders 21a, 21b are oscillated parallel to the upper surface 11a of the base 11 (as indicated by the arrow S direction), and the first and second bit holders 21a, 21b are capable of fixing a drill bit 9 to be ground, and are rotated The drill 9 is displaced in a manner and ready for grinding.

In this embodiment, when the second bit holder 21b is swung to the first and second grinding wheels 121, 122 for grinding, the first bit holder 21a can be placed at a preparation point, and the preparation portion can be planned according to requirements. For example, the device 3 should be adjusted or the device 4 should be fed in and out.

The adjusting device 3 is used for monitoring and adjusting the drilled or to be ground bit 9 fixed to the first and second bit holders 21a, 21b.

In this embodiment, the calibration device 3 includes a displacement unit 30, a first image capture adjustment unit 31, and a second image capture adjustment unit 32. The displacement unit 30 is configured to lift the first and second grinding wheels 121, 122, To adjust the height H of the imaginary connecting line AB, as shown in FIG.

Furthermore, the first image capturing and aligning unit 31 has a first camera 311 and a first charge coupled device (CCD) 312, and the first image of the bit image and the first charge by the first camera 311 The coupler 312 captures the bit image to monitor the first and second bit holders 21a, 21b from a direction perpendicular to the upper surface 11a of the base 11, and is fixed to the first and second bit holders 21a. The relevant dimensions and associated positions of the drill bit 9 of 21b which has been ground or to be ground are monitored and adjusted.

The second image capturing and calibrating unit 32 includes a second camera 321 and a second charge coupled device (CCD) 322. The second camera 321 captures the bit image and the second charge coupled. The 322 captures the bit image to monitor the first and second bit holders 21a, 21b from a direction parallel to the upper surface 11a of the base 11, and is fixed to the first and second bit holders 21a, The relevant dimensions and associated positions of the bit 9 of the ground or to be ground 21b are monitored and adjusted.

In addition, the second camera 321 further has an annular light source structure 3211 (as shown in FIG. 3) to provide a ring-shaped light source (not shown) to the drill bit 9, because the top of the drill bit 9 is very thin. It must be illuminated with a toroidal source to provide a blind-free illumination for precise inspection.

The feeding and unloading device 4 is used for picking up the drill bit 9 on the first and second bit holders 21a, 21b at a bit pick-and-place. In the present embodiment, the feeding and unloading device 4 includes a drill reversing unit 41 and a drill exchange unit 42.

Specifically, when a drill to be ground is fed from the outside, the waiting The long axis of the drill bit is fed in a direction perpendicular to the upper surface 11a of the base 11 of the grinding wheel carrier 1, and the bit reversing unit 41 reverses the direction of the bit to be ground to make the long axis of the bit (hereinafter referred to as The long axial direction is in a direction parallel to the upper plane 11a, and the drill bit to be ground is taken by the drill bit exchange unit 42 and the drill bit to be ground is mounted on the first drill bit 21a or the second drill bit 21b. . Then, the drill advancing and retracting device 2 swings at an angle to transport the first bit holder 21a or the second bit holder 21b to the first grinding wheel 121 and the second grinding wheel 122 for grinding, and the first bit holder The direction of deflection of 21a and the second bit holder 21b is opposite.

Further, when the first bit holder 21a is mounted with the drill to be ground, the other bit mounted on the second bit holder 21b is being ground. Then, when the drill bit to be grounded of the first bit holder 21a is transported to the first grinding wheel 121 and the second grinding wheel 122, the other bit mounted on the second bit holder 21b is ground and finished. The drill bit is transported to the bit exchange unit 42, and the drilled bit is taken out from the second bit holder 21b via the bit exchange unit 42. At this time, the extracted bit presents a direction parallel to the upper plane 11a. Thereafter, the bit exchange unit 42 carries the bit to the bit reversing unit 41, which in turn reverses the bit so that the bit and the upper plane 11a assume a vertical direction to be taken out to the outside.

Referring to Figures 2 and 3 together, the entire grinding procedure from a single drill bit 9 to grinding will be more clearly described.

First, the drill bit 9 to be ground (also the drill bit 9') is transported from a conveyor One of the feed conveyor belts 51 is transported to a robot arm 52 to transport the drill bit 9 to be ground to the drill bit reversing unit 41. At this time, the drill bit 9 and the upper plane 11a are perpendicular to each other. The bit reversing unit 41 inverts the drill bit 9 in a direction parallel to the upper plane 11a, so that the bit exchange unit 42 can take the drill bit 9 to be ground.

Next, the bit exchange unit 42 is deflected by an angle θ 3 (or another embodiment, that is, the bit exchange unit 42 translates), at which time the first and second bit holders 21a, 21b are displaced by an X-axis. The device 25 moves toward the calibration device 3 and approaches where the second camera device 321 is located.

Next, the drill bit 9 to be ground is transferred to and fixed to one of the head ends of the first bit holder 21a, so that the first camera 311, the first charge coupler 312, the second camera 321 and the second charge coupler 322 And the annular light source structure 3211 is used to monitor the relevant size of the drill bit 9 and the relevant positions fixed to the first bit holder 21a, and at the same time, a Z-axis large stroke displacement device 23 and a rotating shaft 26 are provided. (Rotation angle θ 1) adjustment, the X-axis displacement device 25, a Z-axis fine adjustment displacement device 24, and a rotary axis device 22 (rotation angle θ 2) are coordinated with each other to perform various adjustments.

After the adjustment is completed, the rotary shaft device 22 performs an angle rotation to move the drill bit 9 to be grounded between the first center A and the intermediate position M of the two grinding wheels. At this time, the grinding wheel carrier device 1 moves along the imaginary long axis Y in the direction of the conveying device 5, so that the drill 9 passes through the first polishing surface 121a and the second polishing surface 122a in sequence to perform the first polishing.

The drill bit 9 is located at the second center B after the first grinding Between the intermediate position M and the intermediate position M, the grinding wheel carrier 1 will move in the opposite direction (reciprocating motion) along the imaginary long axis Y to move the drill bit 9 back to the first center A and the intermediate position. Between M, the rotating shaft 26 is rotated by an angle θ 1 (180 degrees in this embodiment) to convert the unpolished portion of the other side of the drill 9 to perform the second grinding as in the first grinding mode.

When the drill bit 9 after the second grinding is returned between the first center A and the intermediate position M, the grinding wheel carrier 1 stops moving.

Then, the rotary shaft device 22 performs an angle rotation to move the ground drill 9 to the position just adjusted (ie, the adjustment device 3), and then capture the first and second images. The calibrating units 31, 32 monitor the relevant dimensions of the drill bit 9.

After the monitoring is completed, the bit exchange unit 42 removes the ground bit 9 fixed to the first bit holder 21a, so that the bit 9 is parallel to the upper plane 11a, and then deflects by an angle θ 3 to move to the drill bit. Near the flip unit 41 (or translate the bit flip unit 41), the bit 9 is removed and turned 90 degrees by the bit flip unit 41, so that the bit 9 is perpendicular to the upper plane 11a, so that the robot arm 52 will The ground drill 9 is taken to an discharge conveyor 53 for output.

Further, with respect to the first bit holder 21a, the operation of the other drill bit 9' attached to the second bit holder 21b is shifted, as shown in Fig. 2. When the drill bit 9 of the first bit holder 21a is being ground, the second bit holder 21b is mounting another bit 9' to be ground. When the drill bit 9 of the first drill bit 21a is ground and unloaded from the first drill bit 21a, the second drill bit The drill bit 9' of the seat 21b is being ground. This can be used continuously.

It should be noted that when the first bit holder 21a is moved to the grinding position, the direction in which the bit advance and retract device 2 swings is in the counterclockwise direction, and when the second bit holder 21b is moved to the grinding position, the bit advance and retreat device The direction in which the two swings is in the clockwise direction is as indicated by the reciprocating arrow S in Fig. 1.

Refer to Figures 4A through 4D together. As shown in FIG. 4D, the end surface of the drill bit 9 has four polishing surfaces after grinding, that is, one of the first polishing surface T1, the second polishing surface T2, and the third polishing surface T3 which are divided by the center O. A fourth abrasive surface T4, and the four abrasive surfaces are symmetrically distributed; however, currently commercially available drill bits also have an asymmetrically distributed abrasive surface, and the present invention can also produce the asymmetrically distributed abrasive surface.

As shown in Fig. 4A, when the end face of the drill 9 passes through the first polishing surface 121a at the time of the first polishing, the region surrounded by the point A1 to the point A4 is polished.

As shown in Fig. 4B, when the end face of the drill 9 passes through the second polishing surface 122a at the time of the first polishing, the region surrounded by the point B1 to the point B4 is ground.

As shown in Fig. 4C, when the end face of the drill 9 passes through the first polishing surface 121a at the time of the second polishing, the region surrounded by the point C1 to the point C4 is polished.

As shown in Fig. 4D, when the end surface of the drill 9 passes through the second polishing surface 122a at the time of the second polishing, the region surrounded by the point D1 to the point D4 is polished.

Further, since the polishing surface is out of the range of the respective polishing surfaces, the polished surface to be polished is slightly different from the expected range.

Further, when the respective polishing faces are formed, the center line height h1 of the entire or end face of the drill bit 9 is equal to the height H of the imaginary connecting line AB, as in the 3rd and 4Dth drawings, the second grinding surface T2 and the fourth grinding are not generated. The condition in which the face T4 is separated or overlapped.

The purpose of the grinding bit method of the present invention is to prevent the center line height h1 of the drill bit 9 from being higher or lower than the height H of the imaginary connecting line AB, thereby preventing the second grinding surface T2 from being separated from the fourth grinding surface T4 or Overlapping conditions.

A step diagram of the method of grinding a drill as shown in Fig. 5.

(1) A drill 9 mounted on the first bit holder 21a is ground to define a height H of the imaginary connecting line AB. The specific process is as follows:

(11) The drill bit 9 to be ground is mounted on the first bit holder 21a, and the bit 9 is sent to the first and second grinding wheels 121, 122 for grinding, and the grinding is completed.

(12) The height H of the virtual connecting line AB is defined by the four polishing faces of the drill bit 9, that is, the height of the line segment where the two points D1 and D4 of the fourth polishing surface T4 shown in Fig. 4D are connected.

(2) Positioning operation such that the height h1 of the center line of the drill bit 9 is the same as the height H of the imaginary connection line AB to define the first and second bit holders 21a, 21b and the seat body (such as the wheel holder 12). Or the standard height of the first and second grinding wheels 121, 122. In this embodiment, the standard heights of the first and second grinding wheels 121 and 122 are taken as an example, and the specific process is as follows:

(21) It is judged whether or not the center line height h1 of the drill bit 9 is the same as the height H of the virtual connection line AB. If it is different, the process proceeds to step (22). If the same, the process proceeds to step (26).

(22) determining that the center line height h1 of the drill bit 9 is higher or lower than the height H of the imaginary connection line AB. If it is higher, it overlaps and needs to enter step (23). If it is lower, it is separated. And need to go to step (24).

(23) lowering the center line height h1; or raising the first and second grinding wheels 121, 122 or one of the displacement units 30 to raise the height H of the imaginary connecting line, thereby making the drill bit 9 The center line height h1 is equal to the height H of the imaginary connection line, and proceeds to step (25).

(24) raising the center line height h1; or using the displacement unit 30 to lower the first and second grinding wheels 121, 122 or one of them to lower the height H of the imaginary connecting line, thereby making the center of the drill bit 9 The line height h1 is equal to the height H of the imaginary connection line, and proceeds to step (25).

(25) The drill 9 is sent to the first and second grinding wheels 121, 122 for re-polishing, and after completion of the grinding, the process proceeds to step (21).

(26) The center line height h1 of the drill bit 9 is equal to the height H of the imaginary connecting line AB, and the heights of the first and second grinding wheels 121, 122 are recorded at this time, and the first and second grinding wheels 121, 122 are obtained. The standard height.

(3) The other drill bit 9' to be ground is mounted on the second drill bit 21b, and the first and second grinding wheels 121, 122 are adjusted to the standard height by the displacement unit 30, and detected according to the standard height. The height of the center line of the other drill bit 9' is h2 (not shown).

(4) correcting the operation so that the center line height h2 of the other drill bit 9' is The height H of the imaginary connecting line AB is the same. The specific process is as follows:

(41) It is judged whether or not the center line height h2 of the other drill bit 9' is the same as the height H of the virtual connection line AB. If not, the process proceeds to step (42), and if it is the same, the process proceeds to step (5).

(42) determining that the center line height h2 of the other drill bit 9' is higher or lower than the height H of the imaginary connection line AB. If it is higher, the process proceeds to step (43). If it is lower, the process proceeds to step (44). ).

(43) lowering the center line height h1; or using the displacement unit 30 to raise the first and second grinding wheels 121, 122 or one of them to increase the height H of the imaginary connecting line AB to the other bit The centerline height h2 of 9' is the same and proceeds to step (5).

(44) raising the centerline height h1; or lowering the first and second grinding wheels 121, 122 or one by the displacement unit 30 to lower the height H of the imaginary connecting line AB to the other drill bit 9 'The center line height h2 is the same and go to step (5).

(5) The other drill bit 9' is sent to the first and second grinding wheels 121, 122 for grinding, and the grinding is completed; after that, the other drill bit 9' is withdrawn.

(6) Determine if there are other drill bits to be ground, and if so, perform steps (3) to (5).

In summary, the present invention can determine the height of the imaginary connecting line, for example, adjusting the heights of the first and second grinding wheels so that the height of the imaginary connecting line is equal to the height of the center line of the bit to be ground. Whether the grinding surface of the drill bit is separated or overlapped, and the center line height of the drill bit can be corrected. Therefore, the present invention can surely solve the "separation" and "heavy" generated in the prior art. The condition of the stack can be determined by first defining the standard height of the center line of the grinding wheel, and then correcting the height of the center line of each bit to be ground.

Thus, the patent application of the present invention utilizes the inventor's rich experience to design a simple but fully problematic solution to the conventional technology with a very creative concept. Therefore, the function of the patent application of the present invention does meet the patent requirements of novelty and progress.

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 not limited by the spirit and scope of the present invention, and should be considered as a further embodiment of the present invention.

1‧‧‧Wheel carrier

11‧‧‧Base

11a‧‧‧Upper plane

12, 12'‧‧‧ wheel seat

120a, 120b‧‧‧ grinding wheel

121‧‧‧First grinding wheel

121a‧‧‧First ground surface

122‧‧‧Second grinding wheel

122a‧‧‧Second ground surface

13‧‧‧First drive

14‧‧‧Second drive

15‧‧‧Drive shaft

2‧‧‧Drill advance and retreat device

20‧‧‧Rotating mechanism

21‧‧‧ bit holder

21a‧‧‧First bit holder

21b‧‧‧Second bit holder

210‧‧‧ bracket

22‧‧‧Rotary shaft device

23‧‧‧Z-axis large stroke displacement device

24‧‧‧Z-axis fine-tuning displacement device

25‧‧‧X axial displacement device

26‧‧‧Rotary axis

3‧‧‧ Calibration device

30‧‧‧displacement unit

31‧‧‧First image capture tuning unit

311‧‧‧First camera

312‧‧‧First charge coupler

32‧‧‧Second image capture adjustment unit

321‧‧‧Second camera

3211‧‧‧Circular light source structure

322‧‧‧Second charge coupler

4‧‧‧Incoming and unloading device

41‧‧‧Drilling unit

42‧‧‧Drill Exchange Unit

5‧‧‧Conveyor

51‧‧‧Feed conveyor belt

52‧‧‧ Robotic arm

53‧‧‧Feed conveyor belt

9, 9', 9a‧‧‧ drill bit

90‧‧‧ Grinding Department

90a‧‧‧ end face

A‧‧‧First Center

B‧‧‧Second center

AB, L‧‧‧ imaginary cable

A6A7‧‧ ‧ line segment

d, d’‧‧‧ distance

A1, A2, A3, A4, A6, A7‧‧

B1, B2, B3, B4‧‧ points

C1, C2, C3, C4‧‧ points

D1, D2, D3, D4‧‧ points

H, h, h1‧‧‧ height

M‧‧‧ intermediate position

O‧‧‧ Center

T1‧‧‧ first ground surface

T2‧‧‧Second ground surface

T3‧‧‧ third polished surface

T4‧‧‧4th grinding surface

Α‧‧‧first angle

Β‧‧‧second angle

Y‧‧‧ imaginary long axis

r, r’‧‧‧ height value

θ 1, θ 2, θ 3 angle

(1)~(8)‧‧‧ is the step number

1A and 1B are schematic perspective views of a different embodiment of a grinding bit system of the present invention; FIG. 2 is a partial top plan view of FIG. 1A; and FIG. 3 is a partial side elevational view of FIG. 1A; 4A to 4D are diagrams showing the steps of the end face of the drill bit formed by the grinding bit system of the present invention; Fig. 5 is a flow chart showing the steps of the method for grinding the drill bit of the present invention; and Fig. 6 is the center line height of the conventional drill bit A schematic diagram of the relative positional relationship of the height of the imaginary connecting line in an ideal state; FIG. 7 is a schematic diagram showing the relative positional relationship between the height of the center line of the end face after grinding of the drill bit and the height of the imaginary connecting line; Figure 8 is a schematic diagram showing the relative positional relationship between the height of the center line of the end face after the grinding of the drill bit is lower than the height of the imaginary connecting line; Fig. 9 is a schematic view showing the displacement difference of the imaginary connecting line after adjusting the left grinding wheel in the prior art. And Figure 10 is a schematic diagram of the displacement difference of the imaginary connecting line after adjusting the right grinding wheel in the prior art.

(1)~(8)‧‧‧ is the step number

Claims (10)

A method for grinding a drill bit, comprising: (1) grinding a drill bit mounted on a drill bit seat to define a height of one of the imaginary connecting lines between the centers of the two grinding wheels disposed on the body; Positioning operation such that the height of the center line of the drill bit is the same as the height of the imaginary connecting line to define a standard height of the bit holder, the seat body or the grinding wheel; and (3) mounting another drill bit to be ground to the drill bit Seat, and the height of the center line of the other bit is detected according to the standard height; (4) correcting operation so that the center line height of the other bit is the same as the height of the imaginary connecting line; (5) grinding the other bit And (6) to determine whether there are other drill bits to be ground, if any, proceed to steps (3) to (5). The method of grinding a drill bit according to claim 1, wherein the step (1) includes: (1) mounting the drill to be ground to a drill bit, and sending the drill to the two Grinding between the grinding wheels and completing the grinding; and (2) defining the height of the imaginary connecting line by using the four grinding faces of the drill bit. The method for grinding a drill bit according to claim 1, wherein the step (2) includes: (1) determining whether the center line height of the drill bit is connected to the imaginary connection line The height is the same. If it is different, go to step (2). If it is the same, go to step (6); (2) judge that the center line height of the bit is higher or lower than the height of the imaginary connecting line. If it is higher, then Go to step (3), if it is lower, go to step (4); (3) increase the height of the imaginary connection line, and go to step (5); (4) lower the height of the imaginary connection line, and enter the step (5); (5) sending the drill bit between the two grinding wheels for regrind, and after completing the grinding, proceeding to step (1); and (6) defining the standard height. The method of grinding a drill bit according to claim 1, wherein the step (3) adjusts at least one of the grinding wheels to the standard height, and detects a height of a center line of the other drill bit to be ground. The method of grinding a drill bit according to claim 1, wherein the step (4) includes: (1) determining whether the height of the center line of the other drill bit is the same as the height of the imaginary connecting line; If not, proceed to step (2). If they are the same, go to step (5); (2) determine that the height of the center line of the other bit is higher or lower than the height of the imaginary connection line. If it is higher, proceed to the step. (3) If it is lower, proceed to step (4); (3) increase the height of the imaginary connecting line to the same height as the center line of the other bit, and proceed to step (5); and (4) lower The height of the imaginary connection line is among the other drill bits The height of the heart line is the same and proceeds to step (5). A grinding bit system includes: a grinding wheel carrying device comprising a body, a first grinding wheel and a second grinding wheel disposed on the seat body, the first grinding wheel having a first grinding surface and the first The grinding surface is located at a first center of the same side, and the second grinding wheel has a second grinding surface and a second center on the same side as the second grinding surface, and the first center and the second center are The imaginary connection is defined as an imaginary connecting line, and the grinding wheel carrying device moves reciprocally along the direction of the imaginary connecting line; a drill advance and retreat device rotates the drill bit in a rotating manner, and the drill advance and retreat device comprises at least two for fixing a drill bit holder, when one of the bit holders is moved to the first and second grinding wheels for grinding, the other bit holders are located at a preparation point; and a adjusting device is fixed to the bit holders The drill bit that has been ground or to be ground is monitored and adjusted; and when grinding a drill bit, the calibration device is used for correction so that the height of the center line of the drill bit is the same as the height of the imaginary connection line to define Standard height, while other serve for subsequent milling drill, the milling bit system the height of a standard bit. The grinding bit system of claim 6, wherein the seat body has a plane in which the first and second grinding wheels are disposed, and the first and second grinding surfaces are inclined with respect to the plane. The grinding bit system of claim 6, wherein the adjusting device comprises a displacement unit to adjust the first or second grinding wheel. The grinding bit system of claim 6, wherein the adjusting device comprises a first image capturing and adjusting unit and a second image capturing and adjusting unit, wherein the first image capturing and adjusting unit is used The drill bits on the drill bits are monitored from a direction perpendicular to the base, and the second image capture adjustment unit is configured to monitor the drill bits on the drill bits from a direction parallel to the base. The grinding bit system of claim 6, wherein the grinding and unloading device comprises a feeding and unloading device for picking up and placing the bit on the bit holder at a bit pick and place.