TW201315567A - Drill bit grinding method and drill bit grinding system - Google Patents

Abstract

This invention relates to a drill bit grinding method and a drill bit grinding system. The drill bit grinding method comprises the following steps: (1) placing a drill bit on a drill bit forward/backward moving apparatus; (2) grinding the drill bit with a grinder; and (3) inspecting the drill bit to determine whether it meets the requirements; if yes, dismounting the drill bit from the drill bit forward/backward moving apparatus, and if no, returning to step (2). This invention can effectively save resource and improve the manufacturing yield.

Description

Method for grinding a drill bit and a drill grinding system

The present invention relates to a method of grinding a drill bit and a drill grinding system, and more particularly to a method and a drill grinding system that can detect the quality of the drill bit in a drill grinding system and perform back grinding for those who do not meet the requirements.

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 daily food, clothing, housing, and travel is printed circuit boards. In terms of food, a microwave oven that can heat or cook food; in terms of clothing, a washing machine that can clean clothes; in terms of living, it can illuminate indoor lamps; in terms of line, it can provide a car for passengers. Therefore, as described above, all the tools that must be used every day in daily life, there must be a printed circuit board.

As the range of applications for printed circuit boards has increased, they have been added to multi-layer 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. 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: It is applied to precision industry, so the various sizes of drill bits are Must be very precise. Therefore, before the drill bit is accurately drilled, its own precision must 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.

Drill grinding devices of various functions and designs have been proposed in the prior art, such as the new type of patents M415018 issued by the applicant and the patent applications 100119767 and 100131638 filed by the applicants (all of which are incorporated herein by reference). However, there is still room for improvement and optimization in its use.

Please refer to the first figure, which is a schematic diagram showing the relative positional relationship between the height of the centerline of a drill bit and the height of the imaginary connecting line of the center of the two grinding wheels. As shown, a drill bit R10 holds a drill bit R11, and a grinding portion R12 of the drill bit R11 is supported by a bracket U to maintain the height of a drill center line L7 of the drill bit R11 with the two grinding wheels W1 and W2. One of the center imaginary connecting lines L6 has the same height. Fig. 1 shows the positional relationship between a normal drill bit and the two grinding wheels; and one end face S of the grinding portion R12 is a portion to be ground.

Please refer to the 2A and 2B drawings, which is a schematic diagram of the end face of the drill bit which is grounded at a height lower than the height of the imaginary connecting line of the center of the two grinding wheel, and the height of a bit center line is higher than the height of the imaginary connecting line of the center of the second grinding wheel. The schematic diagram of the end face of the drill As shown in Fig. 1, the end surface S of a drill bit (i.e., the surface to be polished) and the two grinding wheels W1 and W2, when actually ground, the end surface S directly contacts the two grinding surfaces W11 and W22 of the grinding wheels W1 and W2. Therefore, the two grinding wheels W1 and W2 shown in Fig. 2A are viewed from the side, and the ends are The surface S is viewed from the front, so that the polished end surface S has four polished surfaces, including a first polished surface M1, a second polished surface N1, a third polished surface O1 and a first surface. Four polished surfaces P1. The detailed relative position of the end face of the drill bit and the grinding wheels W1 and W2 will be described later in this document. In Fig. 2A, the height of the drill center line L7 is lower than the height of the center imaginary connecting line L6 of the two grinding wheels W1, W2, and the first polished surface M1, the second ground surface N1, and the third ground are obtained after grinding. The surface O1 and the fourth surface to be polished P1, wherein the first surface to be polished M1 is surrounded by a plurality of points A6, B6, C6, D6, D7, and A7, and the second surface to be polished N1 is composed of a plurality of points. A region surrounded by A7, D7, E7, and F7, the third polished surface O1 is surrounded by a plurality of points A6, A7, F7, H7, I7, and I6, and the fourth polished surface P1 is composed of a plurality of points. The area enclosed by A6, I6, J6, and B6. Obviously, the point A6 and the point A7 do not intersect at one point, and the second surface to be polished N1 and the fourth surface to be polished P1 do not intersect, so the industry refers to separation. However, as shown in FIG. 2A, in the case where the bit center line height L7 is lower than the height of the two-wheel center imaginary connection line L6 by 1 μm, the first polished surface M1 and the second polished surface N1 are generated during the polishing. The bit holder that fixes the drill bit is rotated 180 degrees by itself to re-grind to produce the third surface to be polished O1 and the fourth surface to be polished P1. Therefore, as shown in the figure, when the four polished faces are generated, the two sides of the second polished surface N1 and the fourth polished surface P1 are 2 μm apart. Such errors are not acceptable for drilling holes in the PCB. Furthermore, the machine for grinding the drill bit has two grinding wheels, and other matching tools, such as a driving device, a base, a wheel holder, etc., are very heavy overall. Under such conditions, if you want to adjust the machine 1μm on the side of the grinding wheel, Almost impossible.

As shown in Fig. 2B, the height of the drill center line L7 is higher than the height of the imaginary connection line L6 of the center of the two grinding wheels. After polishing, the first surface to be polished M1, the second surface to be polished N1, the third surface to be polished O1 and the fourth surface to be polished P1 are obtained, wherein the first surface to be polished M1 is composed of a plurality of points A6, B6, C6, The area surrounded by D6 and D7, the second surface to be polished N1 is surrounded by a plurality of points A7, A6, D7, E7, and F7, and the third surface to be polished O1 is composed of a plurality of points A7, F7, and H7. In the region surrounded by I7, the fourth polished surface P1 is surrounded by a plurality of points A6, A7, I6, J6, and B6. Obviously, the point A6 and the point A7 do not intersect one point, and the second polished surface N1 and the fourth polished surface P1 each have a line segment A6A7 which is the intersection of each other, so the industry refers to the overlap. However, as shown in FIG. 2B, in the case where the height of the drill center line L7 is higher than the height of the two-wheel center imaginary connection line L6 by 1 μm, the first surface to be polished M1 and the second surface to be polished N1 are generated during the grinding process. The bit holder that fixes the drill bit is rotated 180 degrees by itself to re-grind to produce the third surface to be polished O1 and the fourth surface to be polished P1. Therefore, as shown in the figure, when the four polished faces are generated, the two sides of the second polished surface N1 and the fourth polished surface P1 are 2 μm apart.

Summarizing the causes of the errors described in Figures 2A and 2B, such errors are not acceptable for drilling holes in the PCB. Furthermore, the machine for grinding the drill bit has two grinding wheels, and other matching tools, such as a driving device, a base, a wheel holder, etc., are very heavy overall. Under such conditions, it is almost impossible to adjust the machine 1μm on the side of the grinding wheel.

Please refer to Figures 3A and 3B, which are related to the two grinding wheels in the prior art. The displacement difference diagram of the imaginary connecting line of the center of the two grinding wheel in which the left grinding wheel is retracted is a schematic diagram of the displacement difference of the imaginary connecting line of the center of the second grinding wheel which advances the right grinding wheel of the two grinding wheel in the prior art. As mentioned in the previous paragraph, considering adjusting the machine 1μm on the side of the grinding wheel, as shown in Figure 3A, the left grinding wheel W2 is retracted by 1μm to the dotted line position in the figure, and the height of the imaginary connecting line L6 of the second grinding wheel is increased by 2.801μm; As shown in Fig. 3B, when the right grinding wheel W1 is advanced by 1 μm to the position of the broken line in the figure, the height of the imaginary connecting line L6 of the second grinding wheel is increased by 3.165 μm. The formula for calculating the height difference h is: the amount of movement of the grinding wheel / (tan (∠ right grinding wheel W1) - tan (∠ left grinding wheel)) * cos (∠ moving wheel) = h

Therefore, as shown in Figs. 2A, 2B, 3A, and 3B, it is known that the amount of separation/overlap of 2 μm is corrected, and only the movement amount of 1 μm of the two-wheel center imaginary connection line L6 can be adjusted. To mechanically adjust the amount of movement of the left grinding wheel W2, it can only move 0.357μm, and its calculation formula is: [tan (∠ right grinding wheel W1)-tan (∠ left grinding wheel W2)] *cos (∠ left grinding wheel W2 ) * The vertical distance of the left grinding wheel W2 (such as the vertical distance d shown in Figure 3A, the value of this place is 1, the unit is μm). Therefore, it is still difficult to use the current mechanical method because the distance is too small.

In addition, if it is detected that the drilled bit is not in compliance with the demand, the bit will be returned, and the plurality of drill bits that do not meet the demand will be discarded, resulting in waste of resources.

Therefore, how to avoid the above-mentioned various problems is an important issue that needs to be paid attention to by those who are familiar with related art.

In view of the above-mentioned deficiencies of the prior art, the present invention provides a method of grinding a drill bit, comprising the steps of: (1) placing a drill bit on a drill bit advance and retreat device; (2) grinding the drill bit with a grinding wheel; and (3) detecting the drill bit The drill bit determines whether the drill bit meets the demand, and if so, removes the drill bit from the drill advance and retreat device, and if not, returns to step (2).

The present invention further provides a drill grinding system comprising: a grinding wheel carrying device comprising a grinding wheel for grinding a drill bit; a drill bit advance and retreat device for carrying and moving the drill bit; and a adjusting device for detecting the ground drill bit And determining whether the drill bit meets the demand; and the feeding and unloading device is configured to set the drill to be grounded on the drill advance and retreat device, and if the adjusting device determines that the drilled bit meets the demand after grinding, the feeding and unloading device The drill bit is used to remove the drill bit from the drill advance and retreat device. If the trimming device determines that the drill bit after grinding does not meet the demand, the grinding wheel grinds the drill bit again.

The other embodiments of the present invention will be readily understood by those skilled in the art from this disclosure.

It is to be understood that the structure, the proportions, the size, and the like of the present invention are intended to be used in conjunction with the disclosure of the specification, and are not intended to limit the invention. The qualifications are not technically meaningful, and any modification of the structure, change of the proportional relationship or adjustment of the size does not affect the work that can be produced by the present invention. Both the effects and the achievable objectives should still fall within the scope of the technical contents disclosed in the present invention. In the meantime, the terms "upper" and "one" as used in the specification are merely for convenience of description, and are not intended to limit the scope of the invention, and the relative relationship is changed or adjusted. Substantially changing the technical content is also considered to be within the scope of the invention.

Please refer to FIG. 4A, which is a perspective view of a preferred embodiment of a drill grinding system applied to a method for grinding a drill bit according to the present invention. Referring to FIGS. 4B and 4C, the method for grinding a drill bit of the present invention is applied. BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the bit grinding system is a schematic side view of a drill bit advancement and retraction device and a aligning device of a preferred embodiment of the bit grinding system to which the method of grinding a drill bit of the present invention is applied. The improved drill grinding system comprises: 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 wheel carrier device 1 has a base 11, a wheel base 12 and two driving devices 13, 14. The wheel base 12 is mounted on an upper surface 111 of the base 11, and the wheel base 12 has a first grinding wheel. 121 and a second grinding wheel 122, the two grinding wheels 121, 122 are arranged along the imaginary long axis Y' of the upper plane 111 of the base 11, and the first grinding wheel 121 and the second grinding wheel 122 are An imaginary connecting line AB of a center A and a second center B is parallel to the imaginary long axis Y', and the first grinding surface 1211 and the second grinding surface 1221 of the first grinding wheel 121 and the second grinding wheel 122 respectively The imaginary connecting line AB is parallel, and the first grinding surface 1211 and the second grinding surface 1221 respectively exhibit a tilt between the first angle α and the second angle β of the upper surface 111 of the base 11 , which is the first of the embodiment. Angle α is less than this The second driving unit is a first driving device 13 and a second driving device 14 and drives a first grinding wheel 121 and a second grinding wheel 122 respectively. The grinding wheel carrier device 1 can be driven by a driving shaft 15 . The direction parallel to the imaginary long axis Y' is reciprocatingly moved.

The drill advancing and retracting device 2 is a rotating device for oscillating a bit fixing device 21 mounted thereon parallel to the upper surface 111 of the base 11 of the grinding wheel carrier 1, the drill fixing device 21 having a first drill bit The first bit holder 211 and the second bit holder 212 respectively fix a drill D to be ground to prepare for grinding, and swing to the first bit 211 to the first position. When the grinding wheel 121 and the second grinding wheel 122 are ground, the second bit holder 212 can be placed at a position of the replaceable drill bit to replace a ground drill bit with another drill bit to be ground.

The calibration device 3 has a first image capturing and adjusting device 31 and a second image capturing and adjusting device 32. The first image capturing and adjusting device 31 includes a first camera device 311 and a first device. The charge coupled device (CCD) 312 captures the image of the drill bit through the first camera device 311 and the image of the drill bit image by the first charge coupled device 312 to be perpendicular to the plane above the base 11 of the wheel carrier device 1 . The direction of 111 detects the first bit holder 211 and the second bit holder 212 to be related to the size of each of the plurality of bits of the plurality of bits that have been ground to the first bit holder 211 and the second bit holder 212, The detection and adjustment are performed on the respective positions of the drill bit fixed to the first bit holder 211 and the second bit holder 212. The second image capturing and adjusting device 32 includes a second imaging device 321 and a second charge coupled device. (CCD) 322, the image of the bit image and the bit image of the second charge coupled device 322 are captured by the second image capturing device 321 to be parallel to the plane 111 above the base 11 of the wheel carrier device 1. Directionally detecting the first bit holder 211 and the second bit holder 212 for the relevant size and fixing of each of the plurality of drill bits fixed to the first bit holder 211 and the second bit holder 212 that have been ground and to be ground. Detecting and adjusting at each relevant position of the first bit holder 211 and the second bit holder 212, wherein the second camera device 321 further has an annular light source device 3211 for providing a ring-shaped light source to the drill bit (not shown) The reason is that the top of the drill bit is very thin and must be illuminated with a ring-shaped light source to provide a blind-free illumination for precise inspection.

The feeding and unloading device 4 includes a bit turning device 41 and a bit changing device 42. When a bit to be ground is fed from the outside, one of the long axes of the bit to be ground is associated with the wheel carrier 1 The upper plane 111 of the base 11 is fed in a vertical direction, and the drill turning device 41 reverses the direction of the drill to be ground to make the long axis of the drill bit (the related directions are described later as "long axial direction"). In the direction parallel to the upper plane 111, the bit exchange device 42 then grips the drill bit to be ground and mounts the drill bit to be ground on the first bit holder 211 or the second bit holder 212, so that The drill advance and retreat device 2 swings at an angle to transport the first drill bit 211 or the second drill bit 212 loaded with the drill bit to be ground to the first grinding wheel 121 and the second grinding wheel 122 for grinding, and the drill bit advances and retreats. The device 2 is opposite to the two deflection directions of the first bit holder 211 and the second bit holder 212. Further, when the first bit holder 211 When the second bit holder 212 is mounted with the bit to be polished, another bit mounted on the first bit holder 211 or the second bit holder 212 is being ground, when mounted on the first bit holder 211 or the first When the drill bit to be grounded by the second bit holder 212 is transported to the first grinding wheel 121 and the second grinding wheel 122, the other bit mounted on the first bit holder 211 or the second bit holder 212 has been ground, and Is being transported to the bit exchange device 42 and then the drill bit that has been ground is removed from the first bit holder 211 or the second bit holder 212 via the bit exchange device 42. In the direction parallel to the plane 111, the bit changing device 42 transports the ground bit to the bit turning device 41. The bit turning device 41 reverses the direction of the ground bit so that the ground bit and the upper surface 111 are perpendicular. Wait to be taken out to the outside.

The following is a more logical description of Figures 4B and 4C to illustrate how the entire system is ground in a sequential order. In FIGS. 4B and 4C, the drill to be ground is transported from a feed conveyor belt 51 of a conveyor device 5 to a robot arm 52, which then grips the drill bit to be ground to the drill bit turning device 41. At this time, the drill bit is in a direction perpendicular to the upper plane 111, so that the bit turning device 41 turns the drill bit into a direction parallel to the upper plane 111, and the bit exchange device 42 can then take the drill bit to be ground and then deflect an angle θ 3 (Or another embodiment, that is, the bit turning device 41 can be translated), at this time, an X-axis displacement device 25 moves to the adjusting device 3 and approaches to where the second camera device 321 is located, to be ground. The drill bit is then transferred to and fixed to one of the head ends of the first bit holder 211, the first camera 311, and the first charge coupled device 312. And the second image pickup device 321 and the second charge coupled device 322 cooperate with the annular light source provided by the annular light source device 3211 for the drill D to be ground, the relevant size of the drill D to be ground and each fixed to the first bit holder 211 The relevant position is detected, and a Z-axis large stroke displacement device 23, a rotating shaft 26 (rotation angle θ 1), the X-axis displacement device 25, a Z-axis fine adjustment displacement device 24 and a rotary shaft device 22 (rotation) The angle θ 2) adjusts the motion cooperation with each other, and performs various adjustments. After the adjustment is completed, the rotary shaft device 22 performs an angle rotation to move the drill D to be ground to between the first center A and the first grinding wheel. Between 121 and the intermediate position M of the second grinding wheel 122, at this time, the grinding wheel carrier 1 will move along the imaginary long axis Y' in the direction of the conveying device 5 shown in FIG. 4B, and the drill D to be ground will The first grinding surface 1211 and the second grinding surface 1221 are successively passed to perform the first grinding. When the first grinding ground D to be ground is located between the second center B and the first grinding wheel 121 and the second grinding wheel 122 Grinding wheel between the middle position M The carrier device 1 moves along the imaginary long axis Y' in the opposite direction of the conveying device 5 shown in FIG. 4B to move the bit D that has undergone the first grinding back to the first center A and the first wheel 121. Between the intermediate position M of the second grinding wheel 122, the rotating shaft 26 is rotated by an angle of θ 1 degree (180 degrees in this embodiment), and the second grinding is performed by converting the unmilled portion on the other side of the drill bit D. When the grinding wheel carrier device 1 moves along the imaginary long axis Y' to the conveying device 5 shown in FIG. 4B, the drill bit D to be polished then passes through the first grinding surface 1211 and the second grinding surface 1221. For the second grinding, when the second grinding has been ground, the drill D is again located between the second center B and the first When between the grinding wheel 121 and the intermediate position M of the second grinding wheel 122, the grinding wheel carrier 1 will again move along the imaginary long axis Y' in the opposite direction of the conveying device 5 shown in Fig. 4B, so that the second grinding is performed. The drill bit D moves back to between the first center A and the intermediate position M between the first grinding wheel 121 and the second grinding wheel 122. Then, the grinding wheel carrier 1 stops moving, and the rotary shaft device 22 performs another angle of rotation. The first imaging device 311, the first charge coupled device 312 and the second imaging device 321 and the second charge coupled device 322 are coupled to the annular light source device 3211 to move the drill bit D to the position just adjusted. The ring-shaped light source provided by the drill bit D is ground, and the relevant size of the drill bit D is detected. After the detection, the bit exchange device 42 removes the ground drill D fixed to the head end of the first bit holder 211, and then An angle θ 3 is deflected to move to the vicinity of the bit turning device 41 (or another embodiment, that is, the bit turning device 41 can be translated back), at which time the drill bit D is parallel to the upper plane 111, and the bit turning device 41 will drill the bit D from drill Converting means 42 is removed and turned 90 degrees to the drill bit D and the vertical plane 111, the robot arm 52 in order to facilitate better gripping of the milling bit D conveyed to an outfeed conveyor 53, and conveyed out. As described above, the single bit is from the entire process to be ground to the grinding, and the other end of the second bit holder 212 is opposite. That is, when the drill bit mounted at the head end of the first bit holder 211 is being ground, another bit to be ground is being installed at the head end of the second bit holder 212; when the bit is mounted at the head end of the first bit holder 211 When the grinding is completed and the tip end of the first bit holder 211 is unloaded, the drill bit attached to the tip end of the second bit holder 212 is being ground, and thus can be used reciprocally. It is worth noting that When the first bit holder 211 is moved to the grinding position, the direction in which the bit advancing and retracting device 2 swings is just opposite to the direction in which the bit advancing and retracting device 2 is swung when the second bit holder 212 is moved to the grinding position, as shown in FIG. 4A. Shown.

Please refer to FIGS. 5A to 5D, which are diagrams showing the steps of one end face forming of one of the drills of the method for grinding a drill bit according to the present invention. As shown in FIG. 5A, the end surface of the drill has a total of four polished surfaces after polishing, and is a first polished surface M, a second polished surface N, a third polished surface O 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 polished surface N is composed of the straight line A2D3, one The area surrounded by the curve D3E1, the straight line E1F1 and the straight line F1A2, the third surface to be polished O is an area surrounded by the straight line A2F1, a curve F1H1, a curve H1I2, a curve I2I3 and a straight line I3A2, the fourth The surface to be polished P is a region surrounded by the straight line A2I3, the straight line I3J1, the straight line J1B2, and the straight line B2A2. As shown in FIG. 5A, when the end face of the drill passes through the first polishing surface 1211, a region surrounded by a straight line A1B1, a curved line B1C1, a curved line C1D1, and a straight line D1A1 is ground; as shown in FIG. 5B, when the drill bit is drilled When the end surface passes through the second polishing surface 1221, a region surrounded by a straight line A1'D3, a curve D3E1, a straight line E1F1', and a straight line F1'A1' is polished; thus, the entire drill bit passes through the first bit holder 211 and the first bit The two bit holder 212 performs 180° rotation, and the end face of the drill bit is further polished by the first grinding surface 1211, and as shown in FIG. 5C, the straight line G1F1, a curve F1H1, a curve H1I1, and a straight line I1G1 are obtained. The enclosed area; as shown in Fig. 5D, when the end face of the drill passes through the second polished surface 1221, a region surrounded by a straight line A2I3, a curved line I3J1, a straight line J1B2, and a straight line B2A2 is ground. Since there is a range beyond the surface to be polished at the time of polishing, the surface to be polished which is sequentially polished is slightly different from the range in which the four surfaces to be polished are completely polished.

However, each of the above-mentioned polishing surfaces is formed such that the height of the center line of the entire drill or the end surface is equal to the height of the imaginary connection line AB of the first grinding wheel 121 and the second grinding wheel 122, so that there is no second surface to be polished N and the fourth. A condition in which the polished surface P is separated or overlapped occurs. The method for grinding the drill bit of the present invention is to prevent the height of the center line of the whole or the end surface of the drill bit from being higher or lower than the height of the imaginary connection line AB of the first grinding wheel 121 and the second grinding wheel 122 without the second grinding surface N and The fourth separated surface P is separated or overlapped. Please refer to Figures 6A-1 and 6A-2 for the step diagram of a first preferred embodiment of the method of grinding a drill bit of the present invention. The method comprises the following steps: (1) starting; (2) mounting the first drill to be ground on the first bit holder 211, and feeding the first bit to the two grinding wheels 121, 122 for grinding and finishing grinding (3) Defining the height H of an imaginary connecting line AB between the centers A and B of the two grinding wheels 121 and 122 by using the four grinding faces of the first drill bit, as shown in the fifth polished surface P of FIG. The height of the line connecting the two points A2 and I3 is the height H of the imaginary connecting line AB between the centers A and B of the two grinding wheels 121 and 122; (4) determining the height of the center line of the first drill bit which is finished grinding H1 (not in the picture Is it different from the height H of the imaginary connecting line of the two grinding wheels, if yes, proceed to step (5), if not, proceed to step (10); (5) determine whether the center line height H1 is higher than the imaginary connection of the two grinding wheels The height H of the line, if yes, overlaps, proceeds to step (6), if not, proceeds to step (7); (6) lowers the bit holder 211 by a Z-axis fine adjustment displacement device 24, and proceeds to step (9) (7) the center line height H1 is lower than the height H of the imaginary connection line AB of the two grinding wheels 121, 122, and is separated; (8) the bit seat 211 is raised by the Z-axis fine adjustment displacement device 24, and the steps are advanced. (9); (9) the first drill bit is sent to the two grinding wheels 121, 122 for grinding, and the grinding is completed, and the step (4) is entered; (10) the center line height H1 is equal to the imaginary connecting line of the two grinding wheels 121, 122. Height H; (11) record the height P (not shown) of the bit holder 211 at this time, and obtain a standard height of the bit holder 211; (12) install the second bit to be ground on the bit holder 211, using the Z-axis fine adjustment displacement device 24 to adjust the bit holder 211 to a standard height P, and detecting a center line height H2 of the drill bit (not shown); (13) determining the Is the center line height H2 of the head different from the imaginary connection line AB height H of the two centers A and B of the two or two grinding wheels 121, 122, and if so, proceeds to step (14), and if not, proceeds to step (18); (14) Determine whether the center line height H2 is higher than the false ones of the two grinding wheels 121, 122 If you want to connect the height H of the line AB, if yes, go to step (15), if not, go to step (16); (15) use the Z-axis fine adjustment displacement device 24 to lower the bit holder 211 to reach the center line height H2 equal to the two-wheel The height H of the imaginary connection line AB of 121, 122, and proceeds to step (19); (16) the center line height H2 is lower than the height H of the imaginary connection line AB of the two grinding wheels 121, 122; (17) the Z-axis fine adjustment displacement The device 24 raises the bit holder 211 so that the center line height H2 is equal to the height H of the imaginary connecting line AB of the two grinding wheels 121, 122, and proceeds to step (19); (18) the center line height H2 is equal to the two grinding wheels 121, 122 The imaginary connection line AB height H; (19) the drill bit is sent to the two grinding wheels 121, 122 for grinding and finishing grinding; (20) exiting the finished grinding bit; (21) whether there is any bit to be ground, if Go to step (12), if no, go to step (22); and (22) end.

Please refer to Figures 6B-1 and 6B-2 for the step diagram of a second preferred embodiment of the method of grinding a drill bit of the present invention. The method comprises the steps of: (1') starting; (2') mounting the first drill to be ground on the first bit holder 211, and sending the first bit to the two grinding wheels 121, 122 for grinding, and Finishing the grinding; (3') defining the two grinding wheels 121, 122 by using the four grinding faces of the first drill bit The height H of the imaginary connecting line AB between the centers A and B, and the height of the line connecting the two points A2 and I3 of the fourth ground surface P as shown in FIG. 5D, which is the center of the two grinding wheels 121 and 122 (4') determining whether the center line height H1 (not shown) of the first drill bit that is finished grinding is different from the height H of the imaginary connection line of the two grinding wheels If yes, proceed to step (5'), if not, proceed to step (10'); (5') determine whether the centerline height H1 is higher than the height H of the imaginary connecting line of the two grinding wheels, and if so, overlap and enter Step (6'), if not, proceeding to step (7'); (6') using the Z-axis fine adjustment displacement device 24 to raise the wheel holder 12 carrying the two-wheel, and proceeding to step (9'); (7' The center line height H1 is lower than the height H of the imaginary connection line AB of the two grinding wheels 121, 122, and is separated; (8') the Z wheel axis fine adjustment displacement device 24 is used to lower the wheel head 12, and the step (9' is entered. (9') the first drill bit is sent to the two grinding wheels 121, 122 for grinding, and the grinding is completed, and the step (4') is entered; (10') the center line height H1 is equal to the two grinding wheel 121 The height H of the imaginary connecting line of 122; (11') records the height P (not shown) of the wheel head 12 at this time, and obtains a standard height of the wheel head 12; (12') the first to be ground The second drill bit is mounted on the drill bit holder 211, and the grinding wheel base 12 is adjusted to a standard height P' by the Z-axis fine adjustment displacement device 24, and is inspected. One center line height H2 of the drill bit is measured (not shown); (13') determines whether the center line height H2 of the drill bit is different from the imaginary connection line AB height H of the two centers A and B of the two grinding wheels 121, 122. If yes, proceed to step (14'), if not, proceed to step (18'); (14') determine whether the centerline height H2 is higher than the height H of the imaginary connecting line AB of the two grinding wheels 121, 122, and if so, enter Step (15'), if not, proceed to step (16'); (15') raise the wheel base 12 by the Z-axis fine adjustment displacement device 24 to reach the center line height H2 equal to the imaginary connection line of the two grinding wheels 121, 122 The height H of AB, and proceeds to step (19'); (16') the center line height H2 is lower than the height H of the imaginary connecting line AB of the two grinding wheels 121, 122; (17') the grinding wheel is adjusted by the Z-axis fine adjustment displacement device 24. The seat 12 is lowered so that the center line height H2 is equal to the height H of the imaginary connecting line AB of the two grinding wheels 121, 122, and proceeds to step (19'); (18') the center line height H2 is equal to the imaginary connection of the two grinding wheels 121, 122 The height H of the line AB; (19') the drill bit is sent to the two grinding wheels 121, 122 for grinding, and the grinding is completed; (20') exits the grinding drill ; (21 ') is yet to be ground drill, if yes, proceeds to step (12'), and if not, proceeds to step (22 '); and (22') ends.

The step of the first embodiment adjusts the height of the bit holder, the second The step of the embodiment adjusts the height of the wheel base so that the height of the center line of the drill to be ground is equal to the height of the imaginary connection line of the two grinding wheels. However, it should be additionally noted that the purpose of adjusting the height of the wheel base of the second embodiment is mainly to make the height of the center line of the drill to be ground equal to the height of the imaginary connection line of the two grinding wheels, so the method of grinding the drill bit and the drill bit of the present invention The grinding system may not adjust the height of the grinding wheel seat, but only adjust the height of one of the grinding wheels directly. However, the specific embodiment is known to those skilled in the art to which the present invention pertains, and therefore will not be described herein.

Therefore, it is known from the above steps that the method of grinding a drill bit of the present invention has the following two advantages:

1. Determine whether the separation or overlap of the grinding surface of the drill bit occurs.

2. Correct the height of the drill centerline. In this way, the present invention can surely solve the situation of "separation" and "overlap" generated in the prior art, thereby first finding the standard height of the center line of the grinding wheel, and then the height of the center line of each bit to be ground. The effectiveness of the correction.

Furthermore, the four polished surfaces M, N, O, and P shown in Figures 5A to 5D are symmetrically distributed; however, currently available drill bits have asymmetrically distributed surfaces to be polished. The method of grinding a drill bit of the present invention can also produce the asymmetrically distributed surface to be polished.

In addition, in order to avoid the waste of resources by directly returning and discarding the undesired drill bit after detection, please refer to FIG. 7 , which is a step diagram of a third preferred embodiment of the method for grinding a drill bit according to the present invention. The method of grinding a drill bit can be used in the drill grinding system of the present invention, but not Limitations, the method of grinding the drill bit will be described in detail below.

First, initially, the process proceeds to step S1, the drill bit is placed on the drill advance and retreat device, and then proceeds to step S2; in step S2, the drill bit is ground by the grinding wheel, and then proceeds to step S3; in step S3, the drill bit is detected. And determining whether the drill bit meets the demand, if yes, proceeding to step S4, if not, returning to step S2; in step S4, removing the drill bit from the drill advance and retreat device, and then ending the method of grinding the drill bit of the present invention .

It should be noted that the foregoing embodiment moves the drill bit in a rotating manner and performs re-grinding (ie, back grinding), but the bit movement mode of the drill grinding system of the present invention may also be a linear manner, as shown in FIG. The drill advance and retreat device equipped with the drill to be ground first starts from the feeding device, and sequentially passes through the adjusting device of the first station, the grinding wheel carrying device of the second station, the adjusting device of the third station and the grinding wheel of the fourth station. The device finally reaches the discharge device. In the first station, the calibrating device performs end face and side detection on the drill to be ground to provide grinding data; in the second station, the grinding wheel carrier performs the first grinding; in the third station, the calibrating device performs the first grinding Drill quality inspection, if the quality is poor, the end face and side of the drill bit are tested to provide the data required for re-grinding; in the fourth station, the grinding wheel carrier re-grinds the poor quality drill bit, but if in the third If the bit is detected as a good bit at the station, it will not be re-ground. The aforementioned drill advance and retreat device can adopt a moving mode of the conveyor belt. Further, although FIG. 8 is a schematic diagram of a four-station type drill grinding system, the implementation of the present invention is not limited thereto.

It can be seen from the above that since the method of grinding the drill bit of the present invention and the drill grinding system are to determine that the drill bit after grinding does not meet the demand, the drill is ground again. The head (that is, the drill bit is honed) until it meets the demand, so no drill bit is discarded, and resources are effectively saved, and the overall yield can reach 100%; in addition, the present invention is to judge that the drill bit after grinding does not meet the demand The material is sprayed again on the drill grinding system without the discharge operation, so it can be fully automated, making the overall efficiency extremely high.

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.

S‧‧‧ end face

W1‧‧‧ grinding wheel

W2‧‧‧ grinding wheel

W11‧‧‧Grinding surface

W22‧‧‧Grinding surface

M1‧‧‧ first ground surface

N1‧‧‧Second ground surface

O1‧‧‧ third polished surface

P1‧‧‧ fourth polished surface

L7‧‧‧bit centerline

L6‧‧‧ Grinding wheel center imaginary connection line

R10‧‧‧ bit holder

R11‧‧‧ drill bit

R12‧‧‧ Grinding Department

U‧‧‧ bracket

S‧‧‧ end face

A6‧‧‧ points

B6‧‧‧ points

C6‧‧‧ points

D6‧‧‧ points

D7‧‧ points

A7‧‧ points

F7‧‧ points

H7‧‧ points

I7‧‧ points

I6‧‧ points

J6‧‧ points

D‧‧‧vertical distance

D‧‧‧Drill

Y’‧‧‧ imaginary long axis

M‧‧‧First ground surface

N‧‧‧Second ground surface

O‧‧‧The third surface to be polished

P‧‧‧Four polished surface

A2‧‧ points

B2‧‧ points

C1‧‧ points

D2‧‧ points

D3‧‧‧ points

E1‧‧‧ points

F1‧‧ points

H1‧‧‧ points

I2‧‧ points

I3‧‧ points

J1‧‧ points

G1‧‧‧ points

I1‧‧‧ points

F1’‧‧‧ points

A1’‧‧‧ points

1‧‧‧Wheel carrier

11‧‧‧Base

111‧‧‧Upper plane

12‧‧‧ wheel seat

121‧‧‧First grinding wheel

1211‧‧‧First ground surface

122‧‧‧Second grinding wheel

1221‧‧‧Second ground surface

13‧‧‧First drive

14‧‧‧Second drive

15‧‧‧Drive shaft

2‧‧‧Drill advance and retreat device

21‧‧‧Drill fixing device

211‧‧‧First bit holder

212‧‧‧Second bit holder

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

31‧‧‧First image capture adjustment device

311‧‧‧First camera

312‧‧‧First charge coupled device

32‧‧‧Second image capture adjustment device

321‧‧‧second camera

3211‧‧‧Circular light source device

322‧‧‧Second charge coupled device

4‧‧‧Incoming and unloading device

41‧‧‧Drill bit turning device

42‧‧‧Drill exchange device

5‧‧‧Conveyor

51‧‧‧Feed conveyor belt

52‧‧‧ Robotic arm

θ 3‧‧‧ angle

θ 1‧‧‧ rotation angle

θ 2‧‧‧Rotation angle

(1)~(22), (1’)~(22’), S1~S4‧‧

Figure 1 is a schematic diagram showing the relative positional relationship between the height of the centerline of a drill bit and the height of the imaginary connecting line of the center of the second grinding wheel; Figure 2A is a schematic view of the end face of the drill bit which is grounded at a height lower than the height of the imaginary connecting line of the center of the second grinding wheel; 2B is a schematic diagram of the end face of the drill bit which is grounded by the height of the center line of the drill bit higher than the height of the imaginary connecting line of the center of the second grinding wheel; FIG. 3A is a schematic connection line of the center of the second grinding wheel which is retracted from the left grinding wheel of the second grinding wheel in the prior art. Schematic diagram of the displacement difference; FIG. 3B is a schematic diagram showing the displacement difference of the center imaginary connecting line of the two grinding wheels for advancing the right grinding wheel of the two grinding wheel in the prior art; FIG. 4A is a preferred one of the bit grinding systems applied to the method for grinding the drill bit of the present invention. 3B is a schematic top view of the preferred embodiment of the bit grinding system to which the method of grinding a drill bit of the present invention is applied; and FIG. 4C is a bit grinding system to which the method of grinding a drill bit of the present invention is applied A side view of the drill advancement and retreat device and the aligning device of the preferred embodiment; FIGS. 5A to 5D are diagrams showing the step of forming one end face of the drill bit of the method for grinding the drill bit of the present invention; FIGS. 6A-1 and 6A- 2 is a step diagram of a first preferred embodiment of the method for grinding a drill bit of the present invention; and FIGS. 6B-1 and 6B-2 are diagrams showing a second preferred embodiment of the method for grinding a drill bit of the present invention. Figure 7 is a schematic view of a third preferred embodiment of the method of grinding a drill bit of the present invention; and Figure 8 is a schematic view of the drill grinding system of the present invention.

S1~S4‧‧‧ steps

Claims (9)

A method of grinding a drill bit, comprising the steps of: (1) placing a drill bit on a drill bit advance and retreat device; (2) grinding the drill bit with a grinding wheel; and (3) detecting the drill bit and determining whether the drill bit meets a demand, and if so, Then, the drill bit is removed from the drill advance and retreat device, and if not, the process returns to step (2). The method of grinding a drill bit according to claim 1, wherein the step (2) comprises: feeding the drill bit to the grinding wheel to perform grinding to define one of the centers of the two grinding wheel devices. The height of one of the imaginary connecting lines; and the height of one of the centerlines of one of the drill bits is the same height as the height of the imaginary connecting line between the centers of the grinding wheels to define a standard height of a bit holder carrying the bit. The method of grinding a drill bit according to claim 2, wherein the drill bit is sent to the grinding wheel to perform grinding to define a height of one of the imaginary connecting lines between the centers of the two grinding wheel devices. The method comprises: installing the drill bit to be ground on the drill bit seat, sending the drill bit to the grinding wheel to perform grinding, and completing the grinding; and defining four grinding surfaces of the grinding wheel to define the center of the grinding wheel The height of the imaginary connection line. The method of grinding a drill bit according to claim 2, wherein the height of one of the center lines of the drill bit is corrected to be between the center of the grinding wheel The height of the imaginary connecting line is at the same height to define a standard height of a bit holder carrying the drill bit, comprising the following steps: (41) determining whether the height of the center line of the drill bit that is finished grinding is equal to the two grinding wheel If the height of the imaginary connecting line is different, if yes, proceed to step (42), if not, proceed to step (46); (42) determine whether the height of the center line is higher than the height of the imaginary connecting line of the second grinding wheel, and if so, Proceed to step (43), if not, proceed to step (44); (43) lower the height of the bit holder, and proceed to step (45); (44) raise the height of the bit holder and enter the step ( 45); (45) the drill bit is sent to the second grinding wheel for grinding, and the grinding is completed, the step (41) is entered; and (46) the height of the bit seat is recorded at this time, and the standard height of the bit holder is obtained. A drill grinding system includes: a grinding wheel carrying device comprising a grinding wheel for grinding a drill bit; a drill bit advance and retreat device for carrying and moving the drill bit; and a adjusting device for detecting the drilled bit, and determining the Whether the drill bit meets the requirements; and the feeding and unloading device is configured to set the drill to be grounded on the drill advance and retreat device, and if the adjusting device determines that the drilled bit meets the demand after grinding, the feeding and unloading device is used to The drill bit is removed from the drill bit advance and retreat device, and if the trimming device determines that the drill bit after grinding does not meet the demand, the grinding wheel grinds the drill bit again. The drill grinding system of claim 5, wherein the grinding wheel carrier has a base, a wheel base and a driving device, the grinding wheel seat is mounted on an upper surface of the base, and the grinding wheel seat The grinding wheel is provided, and the driving device drives the grinding wheel. The drill grinding system of claim 6, wherein the drill advancement and retraction device is a rotating device for aligning a drill fixing device mounted thereon parallel to a plane above the base of the grinding wheel carrier device. The drill bit fixture has at least one bit holder for securing the drill bit. The drill grinding system of claim 7, wherein the adjusting device has at least one image capturing and adjusting device, and the image capturing and adjusting device comprises an image capturing device and a charge coupled device, via the image capturing device The photographing of the bit image and the capture of the bit image by the charge coupled device to detect the bit on the bit holder. The bit grinding system of claim 8, wherein the feeding and unloading device comprises a bit turning device and a bit changing device, and when the bit to be ground is fed from the outside, the bit to be ground is a long axial direction is fed in a direction perpendicular to the upper plane of the base of the grinding wheel carrier, and the drill turning device reverses the direction of the drill to be ground so that the long axial direction of the drill bit is parallel to the upper plane In the direction, the bit exchange device then grips the drill bit to be ground, and installs the drill bit to be ground on the drill bit seat, so that the drill advance and retreat device swings at an angle to load the drill bit to be drilled The seat is transported to the grinding wheel device for grinding, and further, when the bit has been ground When it is completed and meets the requirements, the drill bit is transported to the bit exchange device, and the drill bit is taken out from the bit holder through the bit exchange device. At this time, the drilled bit that is taken out of the clamp presents a direction parallel to the upper plane, and the drill bit is in a direction parallel to the upper plane. The exchange device then transports the ground bit to the bit turning device, which in turn reverses the direction of the ground bit so that the ground bit is perpendicular to the upper plane to be removed to the exterior.