TWI451937B - Method for grinding drill - Google Patents

Description

Method of grinding a drill bit

The invention relates to a method for grinding a drill bit, in particular to a drill bit which can judge the generation of the separation or overlapping condition of the grinding surface of the drill bit, and can correct the height of the center line of the drill bit to grind the grinding surface with high precision. method.

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: 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 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.

Please refer to the sixth 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 wheel device. 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 bit center line L7 of the drill bit R11 with the two grinding wheel device W1. It is the same height as the center imaginary connection line L6 of W2. The sixth figure shows the positional relationship between the normal drill bit and the two grinding wheels; and the one end surface S of the grinding portion R12 is the portion to be ground.

Please refer to the seventh and eighth figures, which is a schematic diagram of the end face of a bit grounded by the height of the center line of the drill bit lower than the height of the imaginary connecting line of the center of the grinding wheel device, and the height of the center line of a bit is higher than the imaginary connecting line of the center of the grinding wheel device. A schematic view of the end face of the drill bit that is ground. As shown in the sixth figure, the end surface S of a drill bit (ie, the surface to be polished) and the two grinding wheel devices W1 and W2, when actually ground, the end surface S will directly contact the grinding surface of the grinding wheel device W1 and W2. W22. Therefore, the two grinding wheel devices WI and W2 shown in the seventh figure are viewed from the side, and the end surface S is viewed from the front, so that the polished end surface S has four grinding faces, including a first The surface to be polished M1, a second surface to be polished N1, a third surface to be polished O1, and a fourth surface to be polished P1. The detailed relative position of the end face of the drill bit and the grinding wheel device W1 and W2 will be described later in this document. In the seventh figure, the height of the drill center line L7 is lower than the height of the center imaginary connection line L6 of the two grinding wheel devices W1 and W2, and the first polished surface M1, the second ground surface N1, and the third are obtained after grinding. The surface to be polished 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 plural The area surrounded by points A7, D7, E7, and F7, the third surface to be polished O1 is surrounded by a plurality of points A6, A7, F7, H7, I7, and I6, and the fourth surface to be polished P1 is plural The area enclosed by points 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 the seventh figure, in the grinding process, the first surface to be polished M1 and the second surface to be polished are produced in the process of grinding, the height L7 of the drill bit is lower than the height of the center of the two imaginary connecting lines L6 of the two grinding wheel device. After N1, the drill bit of the fixed 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 wheel devices, 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 1 μm on the side of the grinding wheel device.

As shown in the eighth figure, the height of the drill center line L7 is higher than the height of the center imaginary connection line L6 of the two grinding wheel device. 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 the eighth figure, the height of the drill center line L7 is higher than the height of the center of the two grinding wheel device center imaginary connection line L6 by 1 μm, and the first surface to be polished M1 and the second surface to be polished are generated during the grinding process. After N1, the drill bit of the fixed 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 7 and 8, such errors are not acceptable for drilling holes in the PCB. Furthermore, the machine for grinding the drill bit has two grinding wheel devices, 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 1 μm on the side of the grinding wheel device. Therefore, it is only possible to think from the direction of adjusting the height of the implement holding the drill bit.

Please refer to the ninth and tenth drawings, which are schematic diagrams showing the displacement difference of the center imaginary connecting line of the grinding wheel device of the second grinding wheel device of the second grinding wheel device in the prior art, and the conventional grinding wheel device of the prior art. The right grinding wheel device performs the displacement difference diagram of the imaginary connecting line of the center of the grinding wheel device. As mentioned in the previous paragraph, considering adjusting the machine 1μm on the side of the grinding wheel device, as shown in the ninth figure, the left grinding wheel device W2 is retracted by 1 μm to the dotted line position in the figure, and the height of the center of the two grinding wheel device imaginary connection line L6 will be The height is 2.801 μm; as shown in the tenth figure, when the right grinding wheel device W1 is advanced by 1 μm to the dotted line position in the figure, the height of the center imaginary connection line L6 of the second grinding wheel device is increased by 3.165 μm. The formula for calculating the height difference h is:

The amount of movement of the grinding wheel device / (tan (∠ right grinding wheel device W1) - tan (∠ left grinding wheel device)) * cos (∠ moving grinding wheel device) = h

Therefore, as shown in Figs. 7 to 10, it is known that the amount of separation/overlap of 2 μm is corrected, and only the movement amount of 1 μm of the center of the grinding wheel device center imaginary connection line L6 can be adjusted. If the amount of movement of the left grinding wheel device W2 is mechanically adjusted, it can only move 0.357 μm, and the calculation formula is: [tan (∠ right grinding wheel device W1)-tan (∠ left grinding wheel device W2)]* Cos (∠ left grinding wheel device W2) * The vertical distance of the left grinding wheel device W2 (as shown in the ninth figure, the vertical distance d, 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.

Therefore, how to design a kind of judgment to determine the separation or overlap of the grinding surface of the drill bit, and to correct the height of the center line of the drill bit, so as to be accurately applied to the drilling, is currently familiar with the relevant art. An important topic that people need to pay attention to.

The main object of the present invention is to provide a method for grinding a drill bit, which can judge the generation of the separation or overlapping condition of the grinding surface of the drill bit, and can also correct the height deviation of the center line of the drill bit to grind the drill bit with the highly precise grinding surface. .

A method of grinding a drill bit, comprising the steps of: (1) starting; (2) grinding a first drill bit to define a height H of one of the imaginary connecting lines between the centers of the two grinding wheel devices; (3) Correcting a height H1 of one of the center lines of the first drill bit to be the same height as the height H of the imaginary connecting line between the centers of the two grinding wheel devices to define a standard height of a bit holder carrying the first drill bit P; (4) mounting another drill bit to be ground to the bit holder, and adjusting the bit holder to the standard height P, and detecting a height H2 of one of the center lines of the other bit to be ground; (5) Correcting the height H2 of the center line of the drill to be ground to the same height as the height H of the imaginary connection line between the centers of the two grinding wheel devices, and completing the grinding of the drill to be ground; (6) determining whether there is a drill bit required Grinding, if yes, proceed to step (4), if not, proceed to the next step; and (7) end.

A method of grinding a drill bit, comprising the steps of: (1) starting; (2) grinding a first drill bit to define a height H of one of the imaginary connecting lines between the centers of the two grinding wheel devices; (3) Correcting a height H1 of one of the center lines of the first drill bit and the height H of the imaginary connecting line between the centers of the two grinding wheel devices to define a standard of a wheel holder carrying the two grinding wheel device a height P'; (4) mounting another drill bit to be grounded to a drill bit seat, adjusting the wheel head to the standard height P', and detecting a height H2 of one of the center lines of the other drill bit to be ground (5) correcting the height H2 of the center line of the drill to be ground to the same height as the height H of the imaginary connection line between the centers of the two grinding wheel devices, and completing the grinding of the drill to be ground; (6) judging whether There is still a drill that needs to be ground. If yes, go to step (4), if not, go to the next step; and (7) end.

Referring to the first drawing, a perspective view of a preferred embodiment of a drill grinding system for use in a method of grinding a drill bit according to the present invention, the improved drill grinding system includes: a grinding wheel carrier device 1 having a base 11 A wheel base 12 and two driving devices 13 and 14 are mounted on an upper surface 111 of the base 11, and the wheel base 12 has a first grinding wheel device 121 and a second grinding wheel device 122. The two grinding wheel devices 121 and 122 are arranged in an array along the imaginary long axis Y′ of the upper plane 111 of the base 11 , and the first grinding wheel device 121 and the second grinding wheel device 122 are first. An imaginary connecting line AB of the 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 of the first grinding wheel device 121 and the second grinding wheel device 122 are 1221 is parallel to the imaginary connecting line AB, and the first polishing surface 1211 and the second polishing surface 1221 respectively exhibit a first angle α and a second angle β tilt with the upper surface 111 of the base 11 , which is the embodiment. The first angle α is smaller than the The second driving angle is a first driving device 13 and a second driving device 14, and drives the first grinding wheel device 121 and the second grinding wheel device 122 respectively, and the grinding wheel carrier device 1 can utilize one The drive shaft 15 performs a reciprocating movement in a direction parallel to the imaginary long axis Y'; a drill advance/retract device 2 is a rotating device for paralleling a drill bit fixing device 21 mounted thereon to the grinding wheel carrier device 1 The drill bit fixing device 21 has a first bit holder 211 and a second bit holder 212. The first bit holder 211 and the second bit holder 212 can be respectively fixed to be ground. The drill bit D is ready for grinding, and when the first bit holder 211 is swung to the first grinding wheel device 121 and the second grinding wheel device 122 for grinding, the second bit holder 212 can be at a position of the replaceable bit A grinding bit is replaced and another bit to be ground is mounted; a calibration system 3 has a first image capturing and adjusting device 31 and a second image capturing and adjusting device 32, First image capture adjustment The device 31 includes a first imaging device 311 and a first charge coupled device (CCD) 312. The first imaging device 311 captures the bit image and the first charge coupling device 312 captures the bit image. The first bit holder 211 and the second bit holder 212 are monitored from a direction perpendicular to the plane 111 above the base 11 of the grinding wheel carrier 1 to be ground and fixed to the first bit holder 211 and the second bit holder 212. The relevant size of each of the plurality of drill bits is monitored and adjusted, and the position of each of the drill bits fixed to the first bit holder 211 and the second bit holder 212 is monitored and adjusted. The second image capturing and adjusting device 32 includes a The second imaging device 321 and a second charge coupled device (CCD) 322 are used to capture the bit image through the second camera device 321 and the bit image captured by the second charge coupled device 322 to be parallel to The direction of the plane 111 above the base 11 of the grinding wheel carrier 1 monitors the first bit holder 211 and the second bit holder 212 to fix the plurality of the first bit holder 211 and the second bit holder 212 that have been ground and to be ground. Drill bit The relevant dimensions of each of the drill bits are monitored and adjusted with respect to the respective positions of the first bit holder 211 and the second bit holder 212. The second camera unit 321 further has an annular light source device 3211. The drill bit provides a ring-shaped light source (not shown) because the top of the drill bit is very thin and must be illuminated by a ring-shaped light source to provide a blind-free illumination for precise inspection; and an incoming and outgoing device 4 includes a bit turning device 41 and a bit changing device 42, wherein when a bit to be ground is fed from the outside, one of the long axes of the bit to be ground is the same as the base 11 of the wheel carrier 1 The plane 111 is fed in a vertical direction, and the bit turning device 41 reverses the direction of the bit to be ground, so that the long axis of the bit (the related direction is described later is a long axial direction) and is parallel to the upper plane 111. In the direction of the bit exchange device 42, the drill bit to be ground is then taken, and the drill bit to be ground is mounted on the first bit holder 211 or the second bit holder 212, so that the bit advance and retreat device 2 performs a certain Swinging to transport the first bit holder 211 or the second bit holder 212 loaded with the bit to be ground to the first grinding wheel device 121 and the second grinding wheel device 122 for grinding, and the bit advance and retreat device 2 The two deflection directions for transporting the first bit holder 211 and the second bit holder 212 are opposite. Further, when the first bit holder 211 or the second bit holder 212 is mounted with the bit to be ground, the other device is mounted. The drill bit of the first bit holder 211 or the second bit holder 212 is being ground, and the bit to be ground mounted on the first bit holder 211 or the second bit holder 212 is transported to the first grinding wheel device 121. At the same time as the second grinding wheel device 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 through the bit exchange device. 42. The drill bit that has been ground is taken out from the first bit holder 211 or the second bit holder 212. At this time, the drilled bit that has been taken out is in a direction parallel to the upper plane 111, and the bit exchange device 42 is further polished. Drill bit to drill Reversing means 41, bit reversing means 41 of the milling bit better then the roll direction, it is good to make the milling bit 111 rendered on a plane perpendicular to a direction to be taken out to the outside.

Referring to the second and third figures, the preferred embodiment of the drill grinding system to which the method of grinding a drill bit of the present invention is applied is preferably a top perspective view and a drill grinding system to which the method of grinding a drill bit of the present invention is applied. A side perspective view of the drill advance and retreat device and the calibration system of the embodiment. As shown in the second and third figures, a more logical description will be used to program the entire system in a sequential order. In the second and third figures, the drill bit to be ground is transported from a feed conveyor belt 51 of a conveyor device 5 to a robot arm 52, which then transports the drill bit to be ground to the 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 changing device 42 can then obtain the drill bit to be ground, and then deflect an angle θ3 ( 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 calibration system 3 and approaches to where the second camera device 321 is located. Then, it is transferred to and fixed to one of the head ends of the first bit holder 211, and the first imaging device 311, the first charge coupled device 312 and the second image capturing device 321 and the second charge coupled device 322 are matched with the annular light source device 3211 for grinding. The ring-shaped light source provided by the drill bit D, the relevant size of the drill bit D to be ground and the relevant positions fixed when the first bit holder 211 is fixed, and the transmission through a Z-axis large stroke displacement device 23, The rotation shaft 26 (rotation angle θ1) is adjusted, the X-axis displacement device 25, a Z-axis fine adjustment displacement device 24, and a rotary shaft device 22 (rotation angle θ2) are matched with each other, and various adjustments are made. After the adjustment is completed, The rotary shaft device 22 performs an angle rotation to move the drill D to be grounded between the first center A and the intermediate position M between the first grinding wheel device 121 and the second grinding wheel device 122. The grinding wheel carrier 1 will move along the imaginary long axis Y' in the direction of the conveying device 5 shown in the third figure, and the drill D to be polished will then pass through the first grinding surface 1211 and the second polishing surface 1221 in order to carry out For the first grinding, when the drill D to be ground after the first grinding is located between the second center B and the intermediate position M between the first grinding wheel device 121 and the second grinding wheel device 122, the grinding wheel carrier 1 Moving along the imaginary long axis Y' in the opposite direction of the conveying device 5 shown in the third figure, so that the first grinding bit D is moved back to between the first center A and the first grinding wheel device 121. Middle of the second grinding wheel device 122 Between M, the rotating shaft 26 is rotated by an angle of θ1 (180 degrees in this embodiment) to perform a second grinding by converting the unmilled portion on the other side of the drill D. At this time, the grinding wheel carrier 1 will Moving along the imaginary long axis Y' to the direction of the conveying device 5 shown in the third figure, the drill bit D to be polished then passes through the first grinding surface 1211 and the second grinding surface 1221 again for the second grinding. When the drill D which has been ground by the second grinding is again located between the second center B and the intermediate position M between the first grinding wheel device 121 and the second grinding wheel device 122, the grinding wheel carrier 1 will again follow The imaginary long axis Y' is moved in the opposite direction of the conveying device 5 shown in the third figure to move the bit D that has undergone the second grinding to return to the first center A and the first grinding wheel device 121. Between the intermediate positions M of the second grinding wheel device 122, the grinding wheel carrier device 1 stops moving, and the rotary shaft device 22 performs another angle of rotation to move the ground drill D to the position just adjusted. First camera device 311, first battery The coupling device 312 and the second imaging device 321 and the second charge coupling device 322 cooperate with the annular light source device 3211 to monitor the relevant size of the drill D for the ring-shaped light source provided by the drill bit D. After the monitoring is completed, the drill bit is exchanged. The device 42 removes the ground drill D fixed to the head end of the first bit holder 211 and deflects it by an angle θ3 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 this time the drill D is parallel to the upper plane 111, the drill turning device 41 removes the drill D from the drill exchange device 42 and flips it 90 degrees so that the drill D is perpendicular to the upper plane 111 to facilitate the robot 52 to The ground drill D is picked up and transported to a discharge conveyor belt 53 and transported 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 should be noted 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, such as the first The reciprocating arrows in the figure are shown.

Please refer to FIGS. 4A to 4D, which are diagrams showing the steps of forming one end of the drill bit, which is one of the methods for grinding the drill bit of the present invention. As shown in FIG. 4A, the end faces of the drill bit have a total of four polished surfaces after grinding, and are a first polished surface M, a second polished surface N, a third polished surface O and a fourth ground surface. a 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, a region surrounded by a curve D3E1, a straight line E1F1 and a straight line F1A2, wherein 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 four polished surface 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. 4A, when the end face of the drill passes through the first polishing surface 1211, the area enclosed by the straight line A1B1, the curved line BIC1, the curved line C1D1, and the straight line D1A1 is ground; as shown in the fourth B, When the end face of the bit passes through the second grinding surface 1221, the area enclosed by the straight line A1'D3, a curve D3E1, the straight line E1F1' and the straight line F1'A1' is ground; thus, the integral bit passes through the first bit holder 211. The second bit holder 212 is rotated by 180°, and the end face of the bit is further polished by the first grinding surface 1211 to obtain a line G1F1, a curve F1H1, a curve H1I1 and a straight line I1G1 as shown in the fourth C diagram. The enclosed area; as shown in the fourth D diagram, 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 due to the 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 device 121 and the second grinding wheel device 122, so that there is no second surface to be polished. A condition in which N is separated or overlapped from the fourth surface to be polished P occurs. The method of 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 device 121 and the second grinding wheel device 122, without causing the second The condition in which the polishing surface N is separated or overlaps with the fourth surface to be polished P occurs. Please refer to the fifth drawing, which is a step diagram of a first preferred embodiment of the method for grinding a drill bit of the present invention. The method includes the following steps:

(1) start;

(2) the first drill bit to be ground is mounted on the first drill bit 211, and the first drill bit is sent to the two grinding wheel devices 121, 122 for grinding, and the grinding is completed;

(3) Defining the height H of an imaginary connecting line AB between the centers A and B of the two grinding wheel devices 121 and 122 by using the four grinding faces of the first drill bit, and the fourth ground surface as shown in the fourth D drawing The height of the line connecting the two points A2 and I3 of P is the height H of the imaginary connecting line AB between the centers A and B of the two grinding wheel devices 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 wheel devices, and if yes, proceeding to step (5), if not, Go to step (10);

(5) determining whether the centerline height H1 is higher than the height H of the imaginary connecting line of the two grinding wheel device, if yes, then overlapping, proceeds to step (6), and if not, proceeds to step (7);

(6) using a Z-axis fine-tuning displacement device 24 to lower the bit holder 211, and proceeds to step (9);

(7) the center line height H1 is lower than the height H of the imaginary connecting line AB of the two grinding wheel devices 121, 122, and is separated;

(8) using the Z-axis fine-tuning displacement device 24 to raise the bit holder 211, and proceeds to step (9);

(9) the first bit is sent to the two grinding wheel devices 121, 122 for grinding, and the grinding is completed, proceeds to step (4);

(10) the center line height H1 is equal to the height H of the imaginary connecting line of the two grinding wheel devices 121, 122;

(11) recording the height P (not shown) of the bit holder 211 at this time, and obtaining a standard height of the bit holder 211;

(12) The second drill to be ground is mounted on the bit holder 211, and the bit holder 211 is adjusted to a standard height P by the Z-axis fine adjustment displacement device 24, and the center line height H2 of one of the drill bits is detected (not shown) );

(13) determining whether the center line height H2 of the drill bit is different from the height H of the imaginary connection line AB of the two centers A and B of the two grinding wheel devices 121 and 122, and if yes, proceeding to step (14), if not, proceeding to the step (18);

(14) determining whether the center line height H2 is higher than the height H of the imaginary connection line AB of the two grinding wheel devices 121, 122, and if so, proceeds to step (15), and if not, proceeds to step (16);

(15) using the Z-axis fine-tuning displacement device 24 to lower the bit holder 211, so that the center line height H2 is equal to the height H of the imaginary connection line AB of the two grinding wheel devices 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 wheel devices 121, 122;

(17) using the Z-axis fine-tuning displacement device 24 to raise the bit holder 211, so that the center line height H2 is equal to the height H of the imaginary connection line AB of the two grinding wheel devices 121, 122, and proceeds to step (19);

(18) the center line height H2 is equal to the height H of the imaginary connection line AB of the two grinding wheel devices 121, 122;

(19) sending a drill bit to the two grinding wheel devices 121, 122 for grinding, and finishing grinding;

(20) withdrawing the drill bit that has finished grinding;

(21) Is there still a bit to be ground, if yes, go to step (12), if no, go to step (22); and

(22) End.

Please refer to the eleventh drawing, which is a step diagram of a second preferred embodiment of the method for grinding a drill bit of the present invention. The method includes the following steps:

(1’) begins;

(2') the first drill bit to be ground is mounted on the first drill bit 211, and the first drill bit is sent to the two grinding wheel devices 121, 122 for grinding, and the grinding is completed;

(3') using the four grinding faces of the first drill bit to define the height H of an imaginary connecting line AB between the centers A and B of the two grinding wheel devices 121, 122, and the fourth being polished as shown in the fourth D-picture The height of the line connecting the two points A2 and I3 of the surface P is the height H of the imaginary connecting line AB between the centers A and B of the two grinding wheel devices 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 wheel devices, and if so, proceeding to step (5'), if No, proceed to step (10');

(5') determining whether the center line height H1 is higher than the height H of the imaginary connecting line of the two grinding wheel devices, and if so, overlapping, proceeds to step (6'), and if not, proceeds to step (7');

(6') using the Z-axis fine adjustment displacement device 24 to raise the wheel holder 12 carrying the two grinding wheel device, and proceeds to step (9');

(7') the center line height H1 is lower than the height H of the imaginary connecting line AB of the two grinding wheel devices 121, 122, and is separated;

(8') using the Z-axis fine adjustment displacement device 24 to lower the wheel head 12, and proceeds to step (9');

(9') the first bit is sent to the two grinding wheel devices 121, 122 for grinding, and the grinding is completed, into the step (4');

(10') the center line height H1 is equal to the height H of the imaginary connecting line of the two grinding wheel devices 121, 122;

(11') recording the height P (not shown) of the wheel head 12 at this time, and obtaining a standard height of the wheel head 12;

(12') The second drill to be ground is mounted on the bit holder 211, and the wheel base 12 is adjusted to a standard height P' by the Z-axis fine adjustment displacement device 24, and the center line height H2 of one of the drill bits is detected (in the figure) Not shown);

(13') determining 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 wheel devices 121, 122, and if so, proceeds to step (14'), and if not, enters Step (18');

(14') determining whether the center line height H2 is higher than the height H of the imaginary connection line AB of the two grinding wheel devices 121, 122, and if so, proceeds to step (15'), and if not, proceeds to step (16');

(15') using the Z-axis fine-tuning displacement device 24 to raise the wheel head 12 to reach the center line height H2 equal to the height H of the imaginary connection line AB of the two grinding wheel devices 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 wheel devices 121, 122;

(17') using the Z-axis fine-tuning displacement device 24 to lower the wheel base 12 so that the center line height H2 is equal to the height H of the imaginary connection line AB of the two grinding wheel devices 121, 122, and proceeds to step (19');

(18') the center line height H2 is equal to the height H of the imaginary connection line AB of the two grinding wheel devices 121, 122;

(19') feeding the drill bit to the two grinding wheel devices 121, 122 for grinding, and completing the grinding;

(20') exiting the drill bit that has finished grinding;

(21') whether there is a drill bit to be ground, if yes, proceed to step (12'), and if not, proceed to step (22');

(22’) ends.

The steps of the first embodiment adjust the height of the bit holder. The second embodiment adjusts the height of the wheel holder so that the height of the center line of the bit to be ground is equal to the height of the imaginary connection line of the two grinding wheel devices. 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.

Thus, the present invention can surely solve the "separation" and "overlap" conditions generated in the prior art, thereby achieving the standard height of the center line of the grinding wheel device and the center line of each bit to be ground. The effect of a high degree of correction.

Furthermore, the four polished surfaces M, N, O, and P shown in the fourth to fourth D diagrams are symmetrically distributed; however, the currently available drill bits are also asymmetrically distributed and ground. In addition, the method of grinding a drill bit of the present invention can also produce the asymmetrically distributed surface to be polished.

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 device

W2. . . Grinding wheel device

W11. . . Grinding surface

W22. . . Grinding surface

M1. . . First ground surface

N1. . . Second surface to be polished

O1. . . Third surface to be polished

P1. . . Fourth ground surface

L7. . . Bit center line

L6. . . Grinding wheel device center imaginary connection line

R10. . . Bit holder

R11. . . drill

R12. . . Grinding department

U. . . support

S. . . End face

A6. . . point

B6. . . point

C6. . . point

D6. . . point

D7. . . point

A7. . . point

F7. . . point

H7. . . point

I7. . . point

I6. . . point

J6. . . point

D. . . drill

Y’. . . Imaginary long axis

M. . . First ground surface

N. . . Second surface to be polished

O. . . Third surface to be polished

P. . . Fourth ground surface

A2. . . point

B2. . . point

C1. . . point

D2. . . point

D3. . . point

E1. . . point

F1. . . point

H1. . . point

I2. . . point

I3. . . point

J1. . . point

G1. . . point

I1. . . point

F1’. . . point

A1’. . . point

1. . . Wheel carrier

11. . . Base

111. . . Upper plane

12. . . Wheel seat

121. . . First grinding wheel device

1211. . . First abrasive surface

122. . . Second grinding wheel device

1221. . . Second abrasive surface

13. . . First drive

14. . . Second drive

15. . . Drive shaft

2. . . Drill advance and retreat device

twenty one. . . Drill fixing device

211. . . First bit holder

212. . . Second bit holder

twenty two. . . Rotary shaft device

twenty three. . . Z-axis large stroke displacement device

twenty four. . . Z-axis fine adjustment displacement device

25. . . X axial displacement device

26. . . Rotary axis

3. . . Calibration system

31. . . First image capture adjustment device

311. . . First camera

312. . . First charge coupled device

32. . . Second image capture adjustment device

321. . . Second camera

3211. . . Ring light source device

322. . . Second charge coupled device

4. . . Advance and return device

41. . . Bit turning device

42. . . Bit exchange device

5. . . Conveyor

51. . . Feed conveyor

52. . . Mechanical arm

Θ3. . . angle

Θ1. . . Rotation angle

Θ2. . . Rotation angle

(1)~(22), (1’)~(22’). . . Department step number

BRIEF DESCRIPTION OF THE DRAWINGS The first drawing is a perspective view of a preferred embodiment of a drill grinding system to which the method of grinding a drill bit of the present invention is applied;

2 is a top perspective view of the preferred embodiment of the drill grinding system to which the method of grinding a drill bit of the present invention is applied;

3 is a side perspective view of a drill advancement and retreat device and a calibration system of a preferred embodiment of a drill grinding system to which the method of grinding a drill bit of the present invention is applied;

4A to 4D are the steps of forming one end face of one of the drills of the method for grinding a drill bit of the present invention;

Figure 5 is a diagram showing the steps of a first preferred embodiment of the method of grinding a drill bit of the present invention;

The sixth figure is a schematic diagram showing the relative positional relationship between the height of a drill center line and the height of the imaginary connecting line of the center of the grinding wheel device;

The seventh figure 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 lower than the height of the imaginary connecting line of the center of the grinding wheel device;

The eighth figure 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 two grinding wheel device;

The ninth figure is a schematic diagram of the displacement difference of the center imaginary connecting line of the grinding wheel device of the second grinding wheel device of the two grinding wheel device in the prior art;

The tenth figure is a schematic diagram of the displacement difference of the center imaginary connecting line of the grinding wheel device of the second grinding wheel device of the two grinding wheel device in the prior art;

Figure 11 is a diagram showing the steps of a second preferred embodiment of the method of grinding a drill bit of the present invention.

(1)~(22). . . Department step number

Claims (10)

A method of grinding a drill bit, comprising the steps of: (1) starting; (2) grinding a first drill bit to define a height H of one of the imaginary connecting lines between the centers of the two grinding wheel devices; (3) Correcting a height H1 of one of the center lines of the first drill bit to be the same height as the height H of the imaginary connecting line between the centers of the two grinding wheel devices to define a standard height of a bit holder carrying the first drill bit P; (4) mounting another drill bit to be ground to the bit holder, and adjusting the bit holder to the standard height P, and detecting a height H2 of one of the center lines of the other bit to be ground; (5) Correcting the height H2 of the center line of the drill to be ground to the same height as the height H of the imaginary connection line between the centers of the two grinding wheel devices, and completing the grinding of the drill to be ground; (6) determining whether there is a drill bit required Grinding, if yes, proceed to step (4), if not, proceed to the next step; and (7) end. The method of grinding a drill bit according to claim 1, wherein the step (2) grinds a first drill bit to define a height H of one of the imaginary connecting lines between the centers of the two grinding wheel devices, including the following Step: (21) mounting the first drill to be ground on a drill bit, and feeding the first drill to the two grinding wheel device for grinding and finishing grinding; and (22) using the first drill bit The abrasive faces define the height H of the imaginary connecting line between the centers of the two grinding wheel devices. The method of grinding a drill bit according to claim 1, wherein the step (3) corrects the height H1 of one of the center lines of the first drill bit and the height H of the imaginary connecting line between the centers of the two grinding wheels. Having the same height to define a standard height P of a bit holder carrying the first drill bit comprises the following steps: (31) determining whether the height H1 of the center line of the first drill bit that has been ground is the same as that of the two grinding wheel device If the height H of the imaginary connecting line is different, if yes, proceed to step (32), if not, proceed to step (37); (32) determine whether the height H1 of the center line is higher than the height H of the imaginary connecting line of the two grinding wheel device, if Go to step (33), if not, proceed to step (34); (33) lower the bit holder with a Z-axis fine-tuning displacement device, and proceed to step (36); (34) center line height H1 is lower than two grinding wheels The height H of the imaginary connecting line of the device; (35) using the Z-axis fine-tuning displacement device to raise the bit holder, and proceeding to step (36); (36) sending the first bit to the two grinding wheel device for grinding And complete the grinding, proceed to step (31); (37) center line height H1, etc. Bis imaginary connecting line means of the grinding wheel height H; and (38) Record the height P of the drill holder, the drill bit holder obtain one standard height. The method of grinding a drill bit according to claim 1, wherein the step (4) installs another drill bit to be ground on the drill bit, adjusts the drill bit to the standard height P, and detects the other One height H2 of one of the center lines of the drill to be ground is mounted on the drill bit by another drill bit to be ground, and the Z-axis fine adjustment displacement device is used to adjust the drill bit to the standard height P, and the other to be ground is detected. One of the centerlines of one of the drill bits has a height H2. The method of grinding a drill bit according to claim 1, wherein the step (5) corrects the height H2 of the center line of the drill bit to be ground and the height H of the imaginary connection line between the centers of the two grinding wheel devices. The same height and the grinding of the drill to be ground includes the following steps: (51) determining whether the height H2 of the center line of the drill to be ground is different from the height H of the imaginary connection line between the centers of the two grinding wheel devices, and if so, the step of entering (52), if not, proceed to step (56); (52) determine whether the center line height H2 is higher than the height H of the imaginary connection line of the two grinding wheel device, and if so, proceed to step (53), and if not, proceed to the step ( 54); (53) using a Z-axis fine-tuning displacement device to lower the bit holder so that the center line height H2 is equal to the height H of the imaginary connecting line of the two grinding wheel device, and proceeds to step (57); (54) center line The height H2 is lower than the height H of the imaginary connecting line of the two grinding wheel device; (55) the bit seat is raised by the Z-axis fine adjustment displacement device so that the center line height H2 is equal to the height H of the imaginary connecting line of the two grinding wheel device. And go to step (57) (56) equal to two centerline height H2 triturated height H of the virtual connecting line of the wheel means; and (57) to be ground to the grinding bit intercropping two grinding wheel means, and finish polishing. A method of grinding a drill bit, comprising the steps of: (1) starting; (2) grinding a first drill bit to define a height H of one of the imaginary connecting lines between the centers of the two grinding wheel devices; (3) Correcting a height H1 of one of the center lines of the first drill bit and the height H of the imaginary connecting line between the centers of the two grinding wheel devices to define a standard of a wheel holder carrying the two grinding wheel device a height P'; (4) mounting another drill bit to be grounded to a drill bit seat, adjusting the wheel head to the standard height P', and detecting a height H2 of one of the center lines of the other drill bit to be ground (5) correcting the height H2 of the center line of the drill to be ground to the same height as the height H of the imaginary connection line between the centers of the two grinding wheel devices, and completing the grinding of the drill to be ground; (6) judging whether There is still a drill that needs to be ground. If yes, go to step (4), if not, go to the next step; and (7) end. The method of grinding a drill bit according to claim 6, wherein the step (2) grinds a first drill bit to define a height H of one of the imaginary connecting lines between the centers of the two grinding wheel devices, including the following Step: (21) mounting the first drill to be ground on a drill bit, and feeding the first drill to the two grinding wheel device for grinding and finishing grinding; and (22) using the first drill bit The abrasive faces define the height H of the imaginary connecting line between the centers of the two grinding wheel devices. The method of grinding a drill bit according to claim 6, wherein the step (3) corrects the height H1 of one of the center lines of the first drill bit and the imaginary connection line between the centers of the two grinding wheel devices The height H is the same height to define a standard height P' of a wheel holder carrying two grinding wheel devices, comprising the following steps: (31) determining whether the height H1 of the center line of the first drill bit that is finished grinding is two The height H of the imaginary connecting line of the grinding wheel device is different, if yes, proceed to step (32), if not, proceed to step (37); (32) determine whether the height H1 of the center line is higher than the imaginary connecting line of the two grinding wheel device Height H, if yes, proceed to step (33), if not, proceed to step (34); (33) use a Z-axis fine-tuning displacement device to raise a wheel holder carrying the two grinding wheel device, and proceed to step (36); 34) the center line height H1 is lower than the height H of the imaginary connecting line of the two grinding wheel device; (35) using the Z-axis fine adjustment displacement device to lower the wheel holder carrying the two grinding wheel device, and proceeding to step (36); 36) sending the first drill bit to two abrasive sands Grinding between the wheel device and completing the grinding, proceeding to step (31); (37) the center line height H1 is equal to the height H of the imaginary connecting line of the two grinding wheel device; and (38) recording the height P' of the wheel seat at this time , to obtain a standard height of the wheel seat. The method of grinding a drill bit according to claim 6, wherein the step (4) installs another drill bit to be ground on a drill bit, and adjusts the wheel base to the standard height P', and detects the One height H2 of one of the centerlines of one of the drill bits to be ground is mounted on the drill bit holder, and the Z-axis fine adjustment displacement device is used to adjust the wheel holder to the standard height P', and the other is detected. One of the centerlines of one of the drill bits to be ground is at a height H2. The method of grinding a drill bit according to claim 6, wherein the step (5) corrects the height H2 of the center line of the drill bit to be ground and the height H of the imaginary connection line between the centers of the two grinding wheel devices. The same height and the grinding of the drill to be ground includes the following steps: (51) determining whether the height H2 of the center line of the drill to be ground is different from the height H of the imaginary connection line between the centers of the two grinding wheel devices, and if so, the step of entering (52), if not, proceed to step (56); (52) determine whether the center line height H2 is higher than the height H of the imaginary connection line of the two grinding wheel device, and if so, proceed to step (53), and if not, proceed to the step ( 54); (53) using a Z-axis fine-tuning displacement device to raise the wheel base so that the center line height H2 is equal to the height H of the imaginary connecting line of the two grinding wheel device, and proceeds to step (57); (54) center The line height H2 is lower than the height H of the imaginary connecting line of the two grinding wheel device; (55) the wheel seat is lowered by the Z-axis fine adjustment displacement device so that the center line height H2 is equal to the height H of the imaginary connecting line of the two grinding wheel device H And go to step (57) (56) equal to two centerline height H2 triturated height H of the virtual connecting line of the wheel means; and (57) to be ground to the grinding bit intercropping two grinding wheel means, and finish polishing.