WO2014119843A1

WO2014119843A1 - Method for grinding drill bit

Info

Publication number: WO2014119843A1
Application number: PCT/KR2013/011452
Authority: WO
Inventors: 국연호; 박상록; 이상민; 채승수; 노철하
Original assignee: 주식회사 인스턴
Priority date: 2013-02-01
Filing date: 2013-12-11
Publication date: 2014-08-07
Also published as: CN104955613A; KR20140099391A

Abstract

The present invention relates to a method for grinding a drill bit which can enhance yield and work efficiency and shorten working processes at the time of grinding the drill bit. The method for grinding a drill bit comprises: a first step for loading a drill bit; a second step for installing the drill bit into a chucking unit; a third step for grinding a cutting tip of the drill bit by using a processing unit; a fourth step for checking the cutting tip of the drill bit; and a fifth step for unloading the drill bit.

Description

Drill bit grinding method

The present invention relates to a drill bit polishing method, and more particularly, to a drill bit polishing method that can improve the work efficiency and yield during the polishing operation of the drill bit, and can shorten the work process.

A printed circuit board (PCB) is a circuit board formed by printing a circuit pattern on a electrically insulating substrate using a conductive material such as copper. More specifically, it means a circuit board on which a circuit pattern connecting the mounted electronic components is printed on the surface while determining the mounting position so that various types of electronic components can be mounted on the board.

With the development of electronic components, multilayer printed circuit boards made of overlapping circuit conductors have been developed, and recently, research on the high density of multilayer printed circuit boards has been actively conducted. One specially developed process related to the manufacture of multilayer printed circuit boards is a drilling process for forming holes in printed circuit boards. That is, the perforation process includes a plurality of holes including component holes for fixing electronic components, via holes for connecting traces of electrical circuits of one layer to another, and the like. Forming process.

Since the holes described above are very small diameter holes, tungsten carbide drill bits used for precision machining are required to drill the holes. Tungsten carbide drill bits are suitable for precision machining because they are hard and wear resistant, but after cutting a certain number of holes, the cutting edges wear out, so that hole tolerance cannot be maintained. Therefore, it is desirable to calculate the degree of wear of the drill bit (abrasion rate), and to replace the drill bit after drilling a certain number of holes based on the wear rate. In this case, it is common to use a dull cutting edge by re-polishing because it costs a lot of money to discard the drill bit with the cutting edge as it is.

For example, Korean Patent No. 10-1138847 discloses a re-grinding apparatus of a drill bit for automatically re-grinding the drill bit and automatically inspecting the re-grinded drill bit, and a method of regrinding the drill bit using the same.

According to the conventional drill bit regrinding apparatus and method, the drill bit loaded in the tray is transferred to the grinding unit through a plurality of pickers and the transfer unit and then polished according to the information measured in the inspection unit. At this time, since the drill bit is not subjected to the position adjustment process according to the front angle and the tip position of the drill bit in the process of transferring to the polishing unit, each drill bit transferred to the polishing unit has a different front angle and line unit value. In particular, since the drill bit is transferred through a plurality of pickers and the transfer part, even if the drill bits loaded on the tray have the same front angle and length, the front angle and the tip position may be changed by mechanical errors of the picker and the transfer part during the transfer process.

As a result, the grinding part has to be polished at different angles and dimensions according to each drill bit front angle and tip position, so that it is difficult to precisely grind the drill bit, has a high probability of defective products, and takes a long time. .

The present invention is to solve the above-mentioned problems of the prior art, so that the drill bit transferred to the polishing unit always has a constant front angle and length to improve the work efficiency and yield during the polishing operation of the drill bit, and shorten the work process It is an object of the present invention to provide a method for grinding a drill bit.

Drill bit grinding method according to the present invention for achieving the above object, the first step of loading the drill bit, the second step of mounting the drill bit in the chucking unit and the cutting of the drill bit using the machining unit And a third step of grinding the tip, a fourth step of inspecting the cutting tip of the drill bit, and a fifth step of unloading the drill bit.

The first step, the first-first step of positioning the drill bit in front of the chucking unit, the first-second step of taking a side image of the drill bit, and the drill bit by using the side image of the drill bit A first step of measuring the total length, and a first step of calculating the mounting depth of the drill bit using the total length of the drill bit and the set protrusion length of the drill bit.

The second step is a step 2-1 of photographing the side image of the drill bit, the second step of measuring the end length of the drill bit and the pitch of the drill bit using the side image of the drill bit, and the drill Calculating the front angle of the drill bit, which is an angle between the cutting edge center line of the drill bit and the front reference line, using the length of the distal end of the bit and the pitch of the drill bit; Steps 2-4 for forward rotation, steps 2-5 for mounting the drill bit on the chucking unit, and steps 2-6 for the chucking unit reversely rotating by the front angle of the drill bit.

The third step may include a step 3-1 of photographing a planar image of the drill bit, a step 3-2 of measuring a plane angle that is an angle between the center axis of the drill bit and the plane reference line, and using the measured plane angle. Steps 3-3 for calculating the adjustment distance of the machining unit, and Steps 3-4 for adjusting the moving distance of the machining unit by the calculated adjustment distance and polishing the cutting edge of the drill bit.

The fourth step is a step 4-1 of photographing the front image of the cutting edge and the step 4-2 of determining the overlap or gap of the main edge of the drill bit using the front image of the cutting edge. And a step 4-3 of measuring the width of the main blade using the front image of the cutting edge, and a step 4-4 of measuring the tip of the cutting edge using the front image of the cutting edge.

According to the present invention configured as described above, the front angle of the loaded drill bit is calculated to rotate the chucking unit before the mounting by the front angle, and after mounting the drill bit, the chucking unit is rotated in the opposite direction by the front angle. Through this process, even though the front angles of the drill bits are different from each other before being mounted on the chucking unit, they always have a constant front angle after being mounted on the chucking unit. Therefore, since the front angle of the drill bit mounted on the chucking unit and transferred to the polishing unit is always constant, it is not necessary to individually adjust the machining position and the like during the grinding operation of the drill bit. Therefore, it is possible to improve the work efficiency and yield during the grinding work of the drill bit can shorten the work process.

The present invention calculates the movement distance of the machining unit using a plane angle, which is an angle between the central axis of the drill bit and the plane reference line, and automatically moves the machining unit according to the calculated movement distance. Therefore, even though the drill bit is slightly twisted, the machining unit compensates for this and lowers the defective rate and increases the yield.

The present invention calculates the mounting depth of the drill bit using the total length of the drill bit and the projected length setting value of the drill bit, and inserts the drill bit into the chucking unit according to the calculated mounting depth. Therefore, since the length of the drill bit mounted on the chucking unit and transferred to the polishing unit is always constant, it is not necessary to individually adjust the machining position and the like during the grinding operation of the drill bit.

110: loading unit 120: turntable

130: polishing unit 140: inspection unit

150: unloading unit 160: chucking unit

170: camera

1 is a side view of a typical drill bit.

FIG. 2 is a front view of the drill bit shown in FIG. 1 as viewed from the cutting edge side. FIG.

Figure 3 is a schematic diagram showing a conventional drill bit grinding device.

Figure 4 is a flow chart of a drill bit grinding method according to an embodiment of the present invention.

5 is a flow chart of the loading step according to an embodiment of the present invention.

6 and 7 are views of the loading unit and the chucking unit of the drill bit grinding apparatus.

8 to 10 is a flow chart of the mounting step according to an embodiment of the present invention.

11 and 12 are side images of the drill bit.

13 is a view showing an alignment process of a drill bit.

14 is a flow chart of the polishing step according to an embodiment of the present invention.

15 and 16 are planar and side images of the drill bit.

16 is a flow chart of the inspection step according to an embodiment of the present invention.

17 is a front image of the cutting edge of the drill bit.

18 is a view showing the movement path of the machining unit according to the inspection result.

19 is a front image of the cutting edge of the drill bit.

20 is a diagram illustrating a process of adjusting a drill bit according to a test result.

With reference to the accompanying drawings will be described embodiments of the present invention; In the following description of embodiments according to the present invention, and in adding reference numerals to the components of each drawing, the same reference numerals are added to the same components as much as possible even though they are shown in different drawings.

FIG. 1 is a side view of a general drill bit, and FIG. 2 is a front view of the drill bit shown in FIG. 1 as viewed from the cutting edge side.

The drill bit 10 includes a sink portion 12 for fixing the drill bit 10 to the chucking unit (160 in FIG. X), a drill portion 14 for drilling holes in a workpiece such as a printed circuit board, It is formed at the tip of the drill portion 14 and includes a cutting tip 16 for directly cutting the workpiece.

The cutting edge 16 of the drill bit 10 is provided with a pair of

main blades

16a, 16b and a pair of

auxiliary blades

16c, 16d. In the drawing, the center line 10a of the cutting edge 16 is formed between the main blade 16a and the auxiliary blade 16d positioned on the right side, and between the main blade 16b and the auxiliary blade 16c located on the left side. At this time, the pair of main edge (16a, 16b) is symmetrical around the leading point (end point of the cutting edge, 10b), the pair of auxiliary blades (16c, 16d) is symmetrical around the leading point (10b) Achieve.

The sink 12 is provided with a positioning ring 18. The positioning ring 18 is a means for always keeping the length exposed to the outside when the drill bit 10 is mounted to the chucking unit (160 in FIG. X). That is, the positioning ring 18 serves as a stopper for preventing the drill bit 10 from being inserted more than a predetermined depth. The positioning ring 18 is installed in the sink 12 to be movable so that the position can be adjusted according to the needs of the user.

3 is a schematic view showing a general drill bit polishing apparatus.

Drill bit grinding apparatus 100, the loading unit 110 for supplying the drill bit (10 in Fig. 1) loaded on the supply tray 112, and the drill bit 10 fixed to the chucking unit 122 horizontally A turntable 120 for transferring in the direction, a polishing unit 130 for polishing the drill bit 10 using the processing unit 132, an inspection unit 140 for inspecting the polished drill bit 10, and an inspection. The unloading unit 150 to transfer the completed drill bit 10 to the discharge tray 152. In this case, the loading unit 110, the polishing unit 130, the inspection unit 140, and the unloading unit 150 are disposed radially around the turntable 120. That is, the loading unit 110, the polishing unit 130, the inspection unit 140, and the unloading unit 150 are disposed at intervals of 90 ° around the turntable 120.

On the other hand, four chucking units 160 for fixing the drill bit 10 is installed on the turntable 120 at 90 ㅀ intervals. The turntable 120 rotates at intervals of 90 ° during operation to sequentially supply the drill bit 10 supplied from the loading unit 110 to the polishing unit 130, the inspection unit 140, and the unloading unit 150.

Referring to Figure 3 and 4 with respect to the drill bit grinding method according to this embodiment, the first step (S100) and loading the drill bit 10 loaded on the supply tray 112, drill bit 10 Second step (S200) of mounting the chucking unit 122, the third step (S300) of grinding the cutting edge 16 of the drill bit 10 using the machining unit 132, and the polished drill And a fourth step S400 of inspecting the cutting edge 16 of the bit 10 and a fifth step S500 of transferring the drill bit 10 of which the inspection is completed to the discharge tray 152.

Figure 5 is a flow chart of the loading step according to an embodiment of the present invention, Figures 6 and 7 are views of the loading unit and the chucking unit of the drill bit grinding apparatus.

The first step (S100) of loading the drill bit 10, the first step (S110) for positioning the drill bit 10 in front of the chucking unit 122, and the side image of the drill bit 10 First step (S120) for photographing the first and third steps (130) and 130, measuring the total length (10c) of the drill bit 10 using the side image of the drill bit 10, A first to fourth step 140 of calculating the mounting depth 10e of the drill bit 10 using the total length 10c and the protrusion length set value 10d of (10).

Step 1-1 (S110) is a step of placing one of the plurality of drill bits 10 loaded on the supply tray 112 in front of the chucking unit 122. That is, the gripper 114 of the loading unit 110 picks up the selected drill bit 10 and transfers it to the front of the chucking unit 122. At this time, the gripper 114 wraps only a part of the circumference of the drill bit 10 so that the side of the drill bit 10 is exposed to the outside, which is the drill bit 10 in the first step (S120) to be described later This is to take a picture of the side image.

Step 1-2 (S120) is a step of photographing the side image of the drill bit 10 positioned in front of the chucking unit 122. In FIG. 3, the camera 170 photographing the side image of the drill bit 10 is located on the left side of the chucking unit 122, but in FIG. 5, the camera 170 is illustrated on the right side.

The first step S130 is a step of measuring the entire length 10c of the drill bit 10 using the side image of the drill bit 10 photographed in the first step S120. If the side image of the drill bit 10 is used, the coordinates of the front end point 10b and the rear end point 10f of the drill bit 10 can be known, and the front end point 10b and the rear end point 10f are based on the coordinates. The length between can be measured. At this time, the length between the front end 10b and the rear end 10f of the drill bit 10 becomes the total length 10c of the drill bit 10.

In the first step S140, the drill bit 10 is mounted using the entire length 10c and the protrusion length set value 10d of the drill bit 10 measured in the first step S130. It is a step of calculating the depth 10e. The protruding length set value 10d is the distance between the tip 10b and the chucking unit 122 in a state where the drill bit 10 is mounted on the chucking unit 122. In addition, the mounting depth 10e of the drill bit 10 is a depth inserted into the chucking unit 122 of the entire length 10c of the drill bit 10. Therefore, the mounting depth 10e of the drill bit 10 can be computed through the formula of {the total length 10c of the drill bit 10-the protrusion length set value 10d of the drill bit 10}. .

When the mounting depth 10e of the drill bit 10 is calculated through the above-described process, the drill bit 10 is inserted into the chucking unit 122 by the mounting depth 10e calculated in the mounting step to be described later.

On the other hand, the drill bit 10 to be polished by the polishing method according to the present embodiment may be a drill bit 10 used in the drilling operation, the cutting edge 16 is worn. At this time, the worn drill bit 10 is discarded without grinding when the total length (10c) measured through the 1-3 steps (S130) is less than the set value. For example, in the case of the drill bit 10 whose diameter of the sink part 12 is 3.175 mm, if the total length 10c is less than 37.7 mm, it will be discarded without grinding | polishing.

8 to 10 is a flow chart of the mounting step according to an embodiment of the present invention, Figures 11 and 12 are side images of the drill bit. 13 is a diagram illustrating the alignment process of the drill bit.

First, referring to the side image of the drill bit 10 with reference to Figures 11 and 12, the drill bit 10 includes a plurality of valleys (10i, 10j, 10k, 10m). At this time, the upper position (10i, 10j) is located on the upper side of the drill bit 10 on the side image, and the lower position (10k, 10m) is located below. In addition, the upper bone (10i, 10j) and the lower bone (10k, 10m) located on the cutting edge 16 side is called the first upper bone (10i) and the first lower bone (10k), the second position This will be referred to as the second upper bone 10j and the second lower bone 10m.

As shown in FIG. 8, the second step S200 of mounting the drill bit 10 of FIG. 1 to the chucking unit 122 may include a second step 1-1 of photographing a side image of the drill bit 10. S210 and the second step (S220) of measuring the distal end length 10g of the drill bit 10 and the pitch 10h of the drill bit 10 using the side image of the drill bit 10, A second step of calculating the front angle A of the drill bit 10 which is an angle between the center line 10a of the cutting edge 16 and the front reference line S1 using the distal end length 10g and the pitch 10h. Step 3 (S230), the chucking unit (122 in Figure 6) 2-4 step (S240) is rotated forward by the front angle (A), and the second mounting the drill bit 10 to the chucking unit 122 -5 step (S250), and the chucking unit 122 includes a second to sixth step (S260) of reverse rotation by the front angle (A).

Step 2-1 (S210) is a step of photographing the side image of the drill bit (10). In this case, the side image of the drill bit 10 may be installed separately installed camera or may use the camera 170 used in the above-described first step (S120).

On the other hand, according to the type (normal type, outer blade type) of the drill bit 10, after performing the step 2-1 (S210) for photographing the side image of the drill bit 10 after adjusting the position of the drill bit 10 The second step 2-1-1 (S211) may be further performed.

In the case of the normal type drill bit 10 shown in FIG. 11, the drill bit 10 uses a second bit (S210) of photographing the side image of the drill bit 10, and the drill bit using the side image of the drill bit 10. Step 2-1-1-1 (S2111) of measuring the position of the second upper bone 10j and the second lower bone 10m of the 10, the second upper bone 10j and the second lower bone Step 2-1-1-2 (S2112) for rotating the drill bit 10 so that 10m is positioned on the same vertical line, and the second upper bone 10j and the second lower bone 10m are side reference points. And a step 2-1-1-4 (S2114) for adjusting the position of the drill bit 10 to coincide with (S2, S3), respectively (see Fig. 9).

On the other hand, in the case of the outer blade type drill bit 10 shown in Figure 12, using the 2-1 step (S210) and the side image of the drill bit 10 to take a side image of the drill bit 10, 2-1-1-1 step (S2111) of measuring the position of the second upper bone 10j and the second lower bone 10m of the bit 10, and the second lower bone 10m Step 2-1-1-3 (S2113) for rotating the drill bit 10 to be located at the cutting edge 16 side than the bone 10j, the second upper bone 10j and the second lower bone 10m Step 2-1-1-4 (S2114) for adjusting the position of the drill bit 10 so as to correspond to the side reference points S2 and S3, respectively (see FIG. 10).

As described above, when adjusting the position by rotating the drill bit 10, the cutting tip 16 of the drill bit 10 is always positioned at the same point, thereby improving processing quality. In particular, when the second upper bone 10j and the second lower bone 10m of the drill bit 10 deviate from the ranges of the side reference points S2 and S3, the processing may be performed to lower the defective rate and increase the yield. .

Steps 2-2 to 2-6 will be described with reference to FIGS. 8, 11, 12, and 13.

Step 2-2 (S220) is a step of measuring the length 10g of the distal end of the drill bit 10 and the pitch 10h of the drill bit 10 using the side image of the drill bit 10. The distal end length 10g is a length between the distal end point 10b and the first lower bone 10k and may be measured through the coordinates of the distal end point 10b and the first lower bone 10k. In addition, the pitch 10h is a length between the first lower bone 10k and the second lower bone 10m and may be measured through the coordinates of the first lower bone 10k and the second lower bone 10m. .

Step 2-3 is a step of calculating the front angle A of the drill bit 10 using the distal end length 10g and the pitch 10h measured in the second step S220. . The front angle A of the drill bit 10 is an angle between the center line 10a of the cutting end 16 and the front reference line S1 when the drill bit 10 is viewed from the cutting end 16 side (Fig. 13). This front angle A can be calculated through a formula of {the distal end length 10g of the drill bit 10 / the pitch 10h of the drill bit 10} x 180 °.

Steps 2-4 (S240) to 2-6 (S260) are steps of aligning the drill bit 10 and mounting the chucking unit 122 at the same time. That is, step 2-4 (S240) is a step of forward rotation of the chucking unit 122 by the calculated front angle (A), step 2-5 (S250) the drill bit 10 to the chucking unit 122 ), And the second to sixth steps S260 are the steps of reversely rotating the chucking unit 122 by the calculated front angle A. FIG.

The normal polishing part 130 is set on the basis of when the front angle A of the drill bit 10 is 0 degrees. Therefore, only when the front angle (A) of the drill bit 10 to be transferred to the grinding unit 130 is 0 ° precisely processed and the yield is improved. Thus, in the present embodiment, the front angle A of the drill bit 10 becomes 0 ° in the process of mounting the drill bit 10 to the chucking unit 160 so that it can be always maintained at a constant angle.

Looking in more detail with reference to Figure 13, in the state that the drill bit 10 is mounted on the chucking unit 122, the marker 124 displayed on the center line 10a of the cutting end 16 and the chucking unit 122 is the front It should be set to match the baseline S1 (b in FIG. 13). That is, when the front angle A of the drill bit 10 to be mounted is θ °, the chucking unit 122 is rotated forward (counterclockwise) by θ ° and the centerline 10a of the drill bit 10 The marker 124 is matched (a in FIG. 13). In this state, the drill bit 10 is mounted on the chucking unit 122, and then the chucking unit 160 is rotated backward (clockwise) by θ 시켜 to move the center line 10a and the marker 124 to the front reference line S1. (B in Fig. 13).

After the above-described process, the front angle (A) of the drill bit 10 mounted on the chucking unit 122 is 0 ㅀ. Therefore, the cutting tip 16 of the drill bit 10 can be precisely processed, and work efficiency and yield can be improved.

On the other hand, in the 2-4 step (S240) it can be rotated forward by the chucking unit 122 {front angle (A) + the mounting frequency (n) ° of the drill bit 10). That is, when the drill bit 10 is first mounted on the same chucking unit 122, the forward angle (A) + 1 ° forward rotation, and then the forward angle (A) + 2 ° forward rotation, then The forward rotation angle can be increased by forward rotation (A) + 3 ° forward. As such, when the forward rotation angle is increased by the number of times the drill bit 10 is mounted, the drill bit 10 may be mounted at a different position every time, thereby preventing uneven wear of the chucking unit 122.

14 is a flowchart of a polishing step according to an embodiment of the present invention, Figure 15 is a planar image of the drill bit.

As shown in FIG. 14, the third step S300 of grinding the cutting tip 16 of FIG. 1 includes a total of four detailed steps S310 to S340.

The third step (S310) is a step of photographing the planar image of the drill bit 10. The reason for taking the plane image is to match the central axis 10n of the drill bit 10 to the plane reference line S4 before grinding the drill bit 10. For example, the drill bit 10 transferred to the polishing unit 130 is supported by being seated on a support (not shown). When the support is moved up and down and / or left and right, the center axis 10n of the drill bit 10 is moved. Can match the plane reference line S4. At this time, the means for moving the support is preferably a servomotor capable of fine adjustment, a piezoelectric element (piezoelectric element) capable of precise movement.

As described above, when the support is moved, the center axis 10n of the drill bit 10 may be adjusted to coincide with the plane reference line S4, but may not be exactly matched due to mechanical error. In this case, it is preferable to supplement this through the third to third steps S320 to 3-4 (S340) to be described later.

Step 3-2 (S320) is a step of measuring the plane angle B, which is an angle between the central axis 10n of the drill bit 10 and the plane reference line S4.

Step 3-3 (S330) is a step of calculating the adjustment distance of the machining unit 132 using the plane angle (B) measured in the step 3-2 (S320).

Step 3-4 (S340), by using the adjustment distance (M1) calculated in step 3-3 (S330) to adjust the moving distance of the machining unit 132 cutting edge 16 of the drill bit 10 ) Polishing step.

For example, as shown in FIG. 15, when the plane angle B has a positive value, the plane angle B moves by the distance obtained by adding the adjustment distance to the initial movement distance of the machining unit 132, and the plane angle B has a negative value. It is preferable to move by the distance of the initial movement of the unit 132 minus the adjustment distance.

Figure 16 is a flow chart of the inspection step according to an embodiment of the present invention, Figure 17 is a front image of the cutting edge of the drill bit, Figure 18 is a view showing the movement path of the machining unit according to the inspection result.

16 and 17, the fourth step S400 of inspecting the cutting tip 16 of the polished drill bit 10 is performed in step 4-1 of taking a front image of the cutting tip 16. S410 and the fourth step (S420) of determining the overlap or gap of the

main blades

16a and 16b using the front image of the cutting tip 16, and the cutting tip 16 Step 4-3 (S430) of measuring the widths of the

main blades

16a and 16b using the front image, and the front end point of the cutting tip 16 using the front image of the cutting tip 16 (10b of FIG. 17). And measuring 4-4 (S440).

The front image of the cutting tip 16 photographed in step 4-1 (S410) may have four shapes. That is, as shown in Fig. 17A, when the pair of

main blades

16a and 16b have a shape coinciding with the tip 10b of the cutting tip 16, it is determined to be normal. On the other hand, as shown in (b) of FIG. 17, when the pair of

main blades

16a and 16b have a shape overlapping with each other, this is called an overlap and is determined as defective. In addition, as shown in (c) of FIG. 17, when the pair of

main blades

16a and 16b have a shape spaced apart from each other, this is called a gap and is determined as a defect. In addition, as shown in (d) of FIG. 17, when the pair of

main blades

16a and 16b have different widths, it is referred to as a differential width and is determined as defective.

As described above, when a defect such as an overlap, a gap, a front with, or the like occurs in the polished cutting edge 16, the movement path of the processing unit 132 of FIG. 18 is adjusted.

17 and 18, the movement path of the processing unit 132 will be described.

The processing unit 132 advances along the first path to the drill bit 10 side, moves to the left along the second path, and polishes the first auxiliary blade 16c. In addition, the processing unit 132 reverses along the third path, moves to the left along the fourth path, and polishes the second main edge 16b.

When the grinding of the second week 16b and the first auxiliary blade 16c is completed through the above-described process, the process returns to the first position along the fifth and sixth paths. At this time, the drill bit 10 is rotated 180 degrees relative to the central axis (10n), which is the first and

second grinding blades

16a and 16d (16d) and the second grinding blade (16b) polished and This is to change the position of the first auxiliary blade 16c.

After the drill bit 10 rotates, the machining unit 132 advances along the first path to the drill bit 10 side, moves to the left along the second path, and polishes the second auxiliary blade 16d. In addition, the processing unit 132 reverses along the third path, moves to the left along the fourth path, and polishes the first week blade 16a.

Looking at the method of adjusting the movement path of the machining unit 132 according to the defect of the cutting edge 16 described above are as follows.

When the overlap (FIG. 17 (b)) which the pair of

main blades

16a and 16b overlap each other, and the gap (FIG. 17 (c)) which the pair of

main blades

16a and 16b spaced apart from each other generate | occur | produce, 1st The fourth path for polishing the main blade 16a and the second main blade 16b is adjusted to the fourth 'path or the fourth' path. In addition, when the front ends of the pair of

main blades

16a and 16b having different widths occur, the second path for polishing the first auxiliary blade 16c and the second auxiliary blade 16d may be the second 'path or the like. Adjust to the second ″ path.

19 is a front image of the cutting edge of the drill bit, Figure 20 is a view showing the adjustment process of the drill bit according to the inspection result.

As shown in FIG. 19, when the heights of the pair of

main blades

16a and 16b have different heights, this is called a differential height and is determined to be bad. When such a defect occurs, the tip 10b of the cutting tip 16 is measured through steps 4 and 4 (S440), and the drill bit 10 so that the tip 10b coincides with the front reference point S5. This can be solved by moving, and the process is as follows.

Step 4-4 (S440) uses the front image of the cutting edge 16 taken in the step 4-1 (S410). At this time, the front image of the cutting tip 16 to be used uses an image taken in the state that the drill bit 10 is 0 ㅀ, and an image taken while the drill bit 10 is rotated 180 ㅀ.

When the drill bit 10 in which the front height is generated is photographed at 0 ° and 180 °, a front image as shown in FIG. 20 may be obtained. At this time, by measuring the outer periphery 19 of the drill bit 10 it is possible to calculate the front end point 10b of the drill bit 10, the distance between the calculated front end point 10b and the front reference point (S5) By measuring, the adjustment distance can be obtained (see Fig. 20).

By using the adjustment distance obtained through the above-described process, by moving the support on which the drill bit 10 is seated up and down and / or left and right, it is possible to eliminate the front height.

While the present invention has been described through the preferred embodiments, the above-described embodiments are merely illustrative of the technical idea of the present invention, and various changes may be made without departing from the technical idea of the present invention. Those of ordinary skill will understand. Therefore, the protection scope of the present invention should be interpreted not by the specific embodiments, but by the matters described in the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

Drill using a drill bit grinding device including a loading part for supplying a drill bit, a turntable with a chucking unit, a polishing part with a machining unit, an inspection part for inspecting the drill bit, and an unloading part for discharging the drill bit. In the bit grinding method,

How to load the drill bit,

A first step of positioning a drill bit in front of the chucking unit;

A second step of photographing a side image of the drill bit;

A third step of measuring the total length 10c of the drill bit by using the side image of the drill bit; And

And a fourth step of calculating the mounting depth (10e) of the drill bit using the total length (10c) of the drill bit and the projected length set value (10d) of the drill bit.
The method according to claim 1,

The drill bit polishing method is characterized in that the mounting depth (10e) of the drill bit is {total length (10c) of the drill bit-the set protruding length of the drill bit (10d)).
The method according to claim 2,

Drill bit grinding method characterized in that for discarding the drill bit when the total length (10c) of the drill bit is less than the set value.
Drill using a drill bit grinding device including a loading part for supplying a drill bit, a turntable with a chucking unit, a polishing part with a machining unit, an inspection part for inspecting the drill bit, and an unloading part for discharging the drill bit. In the bit grinding method,

How to mount the drill bit,

A first step of photographing the side image of the drill bit;

A second step of measuring the distal end length 10g of the drill bit and the pitch 10h of the drill bit by using the side image of the drill bit;

A method for calculating the front angle A of the drill bit, which is an angle between the cutting edge center line 10a and the front reference line S1 of the drill bit, using the end length 10g of the drill bit and the pitch 10h of the drill bit. Step 3;

A fourth step in which the chucking unit rotates forward by the front angle A of the drill bit;

A fifth step of mounting a drill bit on the chucking unit; And

And a sixth step of rotating the chucking unit by the front angle (A) of the drill bit.
The method according to claim 4,

The front angle A of the drill bit is {the length of the distal end portion of the drill bit (10g) / the pitch of the drill bit (10h)} × 180 °, characterized in that the drill bit grinding method.
The method according to claim 4,

The fourth step, the drill bit grinding method, characterized in that the chucking unit is rotated forward by {front angle (A) + the mounting number (n) ° of the drill bit).
The method according to claim 4,

And a first step (1-1) of adjusting the position of the drill bit using the side image of the drill bit.
The method of claim 7, wherein

Step 1-1-1 includes measuring the position of the upper bone 10j and the lower bone 10m of the drill bit by using the side image of the drill bit; And

And a step 1-1-2 of rotating the drill bit such that the upper bone 10j and the lower bone 10m are positioned on the same vertical line.

Drill bit grinding method characterized in that the upper bone 10j of the drill bit is a bone located on the upper side of the drill bit, the lower bone (10m) of the drill bit is a bone located on the lower side on the side image of the drill bit. .
The method of claim 7, wherein

Step 1-1-1 includes measuring the position of the upper bone 10j and the lower bone 10m of the drill bit by using the side image of the drill bit; And

And a step 1-1-3 for rotating the drill bit such that the upper bone 10j is located at the cutting edge side than the lower bone 10m,

Drill bit grinding method characterized in that the upper bone 10j of the drill bit is a bone located on the upper side of the drill bit, the lower bone (10m) of the drill bit is a bone located on the lower side on the side image of the drill bit. .
The method according to claim 8 or 9,

Drill bit grinding method comprising the first to fourth step of adjusting the position of the drill bit such that the upper bone (10j) and the lower bone (10m) of the drill bit to match the side reference points (S2, S3) .
Drill using a drill bit grinding device including a loading part for supplying a drill bit, a turntable with a chucking unit, a polishing part with a machining unit, an inspection part for inspecting the drill bit, and an unloading part for discharging the drill bit. In the bit grinding method,

The method of grinding the cutting edge of the drill bit,

A first step of photographing the planar image of the drill bit;

A second step of measuring a plane angle B, which is an angle between the center axis 10n of the drill bit and the plane reference line S4;

A third step of calculating an adjustment distance of the processing unit using the measured plane angle B; And

And a fourth step of adjusting the moving distance of the machining unit by the calculated adjustment distance and polishing the drill bit cutting edge.
Drill bit grinding using a drill bit grinding device including a loading part for supplying a drill bit, a turntable with a chucking unit, a polishing part with a machining unit, an inspection part for the drill bit, and an unloading part for discharging the drill bit. In the method,

To check the cutting edge of the drill bit,

A first step of photographing the front image of the cutting edge; And

And a second step of determining an overlap or gap of the main edge of the drill bit by using the front image of the cutting tip,

Drill bit grinding method characterized in that for adjusting the movement path of the processing unit in accordance with the overlap or spacing of the main blade.
The method according to claim 12,

A third step of measuring the width of the main blade using the front image of the cutting edge,

Drill bit grinding method characterized in that for adjusting the movement path of the processing unit according to the width of the main blade
The method according to claim 13,

And a fourth step of measuring the tip 10b of the cutting tip by using the front image of the cutting tip.

Drill bit grinding method characterized in that the drill bit is moved so that the front end point (10b) and the front reference point (S5) of the cutting edge coincides.
The method according to claim 14,

The fourth step, the drill bit grinding method characterized in that for measuring the tip twice (10b) of the cutting edge by rotating the drill bit 180 °.
Drill using a drill bit grinding device including a loading part for supplying a drill bit, a turntable with a chucking unit, a polishing part with a machining unit, an inspection part for inspecting the drill bit, and an unloading part for discharging the drill bit. In the bit grinding method,

A first step of loading a drill bit;

A second step of mounting a drill ratio on the chucking unit;

A third step of grinding the cutting edge of the drill bit using the processing unit;

A fourth step of inspecting a cutting edge of the drill bit; And

And a fifth step of unloading the drill bit.
The method according to claim 16,

The first step,

Step 1-1 to position the drill bit in front of the chucking unit;

Step 1-2 to photograph the side image of the drill bit;

Measuring the entire length 10c of the drill bit by using the side image of the drill bit; And

And a first to fourth step of calculating the mounting depth (10e) of the drill bit using the total length (10c) of the drill bit and the projected length set value (10d) of the drill bit.
The method according to claim 17,

The drill bit polishing method is characterized in that the mounting depth (10e) of the drill bit is {the total length of the drill bit (10c)-the set protruding length of the drill bit (10d)).
The method according to claim 18,

Drill bit grinding method, characterized in that for discarding the drill bit when the total length (10c) of the drill bit.
The method according to claim 16,

The second step,

Step 2-1 of taking a side image of the drill bit;

A step 2-2 of measuring the length of the distal end portion 10g of the drill bit and the pitch 10h of the drill bit by using the side image of the drill bit;

A method for calculating the front angle A of the drill bit, which is an angle between the cutting edge center line G and the front reference line S1 of the drill bit, using the end length 10g of the drill bit and the pitch 10h of the drill bit. 2-3 steps;

Steps 2-4 in which the chucking unit rotates forward by the front angle A of the drill bit;

A step 2-5 of mounting a drill bit on the chucking unit; And

And a second to sixth step in which the chucking unit rotates back by the front angle A of the drill bit.
The method of claim 20,

The front angle A of the drill bit is {the length of the distal end of the drill bit (10 g) / the pitch of the drill bit.

And (10h)} × 180 °.
The method of claim 20,

Step 204, the drill bit grinding method, characterized in that the chucking unit is rotated forward by {front angle (A) + the mounting number (n) of the drill bit).
The method of claim 20,

And a step 2-1-1 of adjusting the position of the drill bit using the side image of the drill bit.
The method of claim 23, wherein

Step 2-1-1-1, Step 2-1-1-1 measuring the position of the upper bone (10j) and lower bone (10m) of the drill bit using the side image of the drill bit; And

And a step 2-1-1-2 of rotating the drill bit such that the upper valley 10j and the lower valley 10m are positioned on the same vertical line.

Drill bit grinding method characterized in that the upper bone 10j of the drill bit is a bone located on the upper side of the drill bit, the lower bone (10m) of the drill bit is a bone located lower on the side image of the drill bit .
The method of claim 23, wherein

Step 2-1-1-1, Step 2-1-1-1 measuring the position of the upper bone (10j) and lower bone (10m) of the drill bit using the side image of the drill bit; And

And a step 2-1-1-3 of rotating the drill bit such that the lower bone 10m is positioned at the cutting edge side than the upper bone 10j,

Drill bit grinding method characterized in that the upper bone 10j of the drill bit is a bone located on the upper side of the drill bit, the lower bone (10m) of the drill bit is a bone located on the lower side on the side image of the drill bit. .
The method according to claim 24 or 25,

The upper bone 10j and the lower bone 10m of the drill bit coincide with the side reference points S2 and S3.

Drill ratio comprising the step 2-1-1-4 of adjusting the position of the drill bit

Grinding method.
The method according to claim 16,

The third step,

Step 3-1 to take a plane image of the drill bit:

Step 3-2 of measuring a plane angle B, which is an angle between the center stroke 10n of the drill bit and the one-side reference line S4;

Calculating the adjustment distance M1 of the processing unit using the measured plane angle B; And

And a third to fourth steps of adjusting the moving distance (M2) of the processing unit by the calculated adjustment distance (M1) and polishing the cutting edge of the drill bit.
The method according to claim 16,

The fourth step is.

Step 4-1 of taking a front image of the cutting edge; And

Including the step 4-2 to determine the overlap (overlap) or the gap (gap) of the main blade of the drill bit using the front image of the cutting edge,

Drill bit grinding method characterized in that for adjusting the movement path of the processing unit in accordance with the overlap or spacing of the main blade.
The method according to claim 28,

Including the third step of measuring the width of the main blade using the front image of the cutting edge,

Drill bit grinding method characterized in that for adjusting the movement path of the processing unit according to the width of the main blade.
The method of claim 29,

And a fourth step of measuring the front end point 10b of the cutting end using the front image of the cutting end.

Drill bit grinding method characterized in that the drill bit is moved so that the front end point (10b) and the front reference point (S5) of the cutting edge coincides.
The method of claim 30,

Step 4-4 is a drill bit grinding method, characterized in that to measure twice by rotating the drill bit 180 ° when measuring the front end point (10b) of the cutting edge.