TWI676524B - Drill bit sharpener capable of arbitrarily adjusting the chisel edge size of a drill bit - Google Patents

Abstract

The invention discloses a drill sharpener capable of arbitrarily adjusting the size of a two-slope or three-slope drill bit. The drill sharpener is provided above a grinding wheel of a drill bit sharpener, and a drill bit set can be inserted into the static point. The movable sleeve of the grinding base further extends the front end of a drill bit fixed to a drill bit jacket set to the grinding wheel, and grinds out the two-edge apex angle, clearance angle and static point of the front end of the drill bit; in particular, the static-point grinding base A rotatable adjusting ring is arranged on the upper part. When the adjusting ring rotates, a pushing member inside it can be adjusted. According to the scoring instructions, the adjusting ring can be adjusted to change the upper and lower positions so that the pushing member can push or relax the activity through the inclined structure. The sleeve enables the movable sleeve to be raised and lowered; thereby, the present invention can adjust the height of the drill clamp sleeve set when inserted into the movable sleeve, and change the depth at which the drill tip contacts the grinding wheel. Therefore, according to factors such as the material and processing conditions of the workpiece, The most suitable tip angle and clearance angle are ground at the front of the drill.

Description

Bit sharpener capable of freely adjusting the size of two or three bevel drill bits

The invention relates to a drill bit sharpener, in particular to a drill bit sharpener capable of grinding the tip angle, clearance angle and dead point of the drill bit, and capable of arbitrarily adjusting the size of the dead point of the two-slope or three-slope drill bits.

One of the most common double-edged drill bits (commonly known as twist drill bits) today is a tool for drilling. Refer to Figures 1 and 2, its main structure has a cylindrical tool bar 101, There are two spiral grooves 102 extending to the machining end. The machining end is ground with two cutting edges 103. The two cutting edges 103 form an apex angle θ1 (apex angle), and the back of the cutting edge 103 is connected with a back oblique clearance. Angle 104, the back oblique escape clearance angle 104 has a clearance angle θ2, and forms a dead point 105 at the intersection of the tips of the two oblique escape clearance angles 104 connected. In the past, the grinding method of the drill bit such as the apex angle θ1 and the clearance angle θ2 was performed by the user holding the drill near the grinding machine. With his experience and ingenious operation techniques, the grinding wheel grinds the correct apex angle and clearance angle. With static point. However, this technology is not readily available. It can only be obtained through years of actual operation and experience accumulation. For workers who do not know how to drill a bit, it is often impossible to accurately and accurately trim the drill end.

In order to solve the problem of manual grinding of drill bits, a special drill sharpening machine has been provided in the workshop. It is equipped with a drill jacket adjustment seat, an angle trimmer and a static point grinding seat at a selected location of a drill sharpening machine. At least one drill bit jacket set, which can be provided as a dedicated drill for rapid grinding. The static point grinding seat of the conventional drill bit sharpener is fixed above the grinding wheel to grind out the backslope clearance angle 104 and the clearance angle θ2 of the drill bit, and grind out the static point 105 of the above drill tip. The known static point grinding seat cannot allow fine-tuning, that is, it cannot easily and quickly adjust the adjustment ring according to the scoring instructions. It can change the width of the upper and lower positions, so it cannot be rotated and fed according to the processing conditions such as the material of the workpiece. Grind the best machined end of the drill.

In order to solve the shortage and limitation that the existing drill grinder can only grind the drill bit with a fixed clearance angle and the size of the dead point, according to the existing patent data, there is a drill grinder that can adjust the dead point, such as Chinese Patent Bulletin M530207, As shown in M462164, M459951, and M459956, it mainly connects one end of the static-point grinding base to a vertical plate of the grinder, and additionally combines an adjustment screw and a fixing screw so that the front end of the adjustment screw passes through the static-point grinding. The seat abuts against the vertical plate or other parts, and the fixing screw is used to fix the adjusting screw or other parts, thereby rotating the adjusting screw to swing the static point grinding seat up and down, thereby adjusting the angle of the static point. However, this structure may cause the vertical plate on the side of the grinder to have no space and then install a third bevel grinding base, or other mechanisms required for grinding. Such institutions have no numbers to look at, and are difficult to adjust. They cannot effectively grasp the results of the final resize, so they are not practical and are not suitable for customers.

The object of the present invention is to provide a drill bit sharpener capable of arbitrarily adjusting the size of a two-slope or three-slope drill bit, which is improved by the static point grinding seat of the bit sharpener. Control the size of the static point when grinding the drill bit, and then reach the drill bit sharpener that allows the user to easily adjust the size of the static point according to the scratched digital instructions for grinding.

In order to achieve the above-mentioned object, the present invention provides a drill bit sharpener capable of arbitrarily adjusting the size of a two-slope or three-slope drill bit. The preferred technical solution includes: a drill point sharpener is provided with a static point grinding seat above the grinding wheel, and a drill bit. The jacket set can be inserted into the static-point grinding seat, and the front end of a drill bit fixed to the drill jacket set is extended to the grinding wheel of the drill sharpening machine to grind out the clearance angle of the two edges at the front end of the drill bit; wherein, the The static point grinding base includes a fixed base, an adjustment ring, a pusher and a movable sleeve; one side of the fixed base is fixed to a vertical plate of the drill sharpener, and is located above the grinding wheel and above it. A through hole communicating with the lower wheel and aligned with the grinding wheel is provided; the adjusting ring is rotatably disposed above the fixing seat and is coaxial with the through hole of the fixing seat; the pushing member is combined with the adjusting ring The inner ring surface member has a top surface facing upward, and the top surface is provided with two downward slant surface pushing portions facing upward; the movable sleeve is a pipe body with a receiving hole, which can be rotatably passed through Placed in the through hole of the adjusting ring and the fixing seat, A convex ring is arranged around the upper end, and the convex ring is located on the pushing member in the adjusting ring. A top surface of the convex ring is supported by the drill sleeve set, and a bottom surface of the convex ring is provided with two downwards. And the upper inclined surface pushing part which is close to the lower inclined surface pushing part; and the adjusting ring drives the pushing part to rotate together, the lower inclined surface pushing part pushes or relaxes the upper inclined surface pushing part, causing the movable sleeve The barrel is raised and lowered in the adjusting ring to adjust the size of the dead point of the drill bit grinding.

More preferably, in the above-mentioned drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, the pushing member is a ring combined with the inner ring surface of the adjusting ring.

More preferably, in the above-mentioned drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, the lower bevel pushing portion includes a trapezoidal projection protruding upward from the top surface, and the middle of the trapezoidal projection A lower plane is provided, and two ends of the lower plane are respectively connected to a lower slope, and the lower slope is diagonally connected to the top surface.

More preferably, in the above-mentioned drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, the upper bevel pushing portion includes a trapezoidal groove recessed into the bottom surface of the convex ring, and the middle of the trapezoidal groove An upper plane is provided, and two ends of the upper plane are respectively connected to an upper inclined plane, and the upper inclined plane is obliquely connected to the bottom surface of the convex ring.

More preferably, the above-mentioned drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit further includes a fixing unit provided on the fixing seat on the side of the adjusting ring, and the fixing unit Clamp or loosen the adjustment ring.

More preferably, in the above-mentioned drill sharpening machine capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, the fixing unit includes a clamping block disposed on the fixing seat on one side of the adjusting ring, A clamping jaw that is pressed against the adjusting ring is protruded from one side of the clamping block; and a fixing screw passes through the clamping block and is locked on the fixing base.

More preferably, in the above-mentioned drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, the ring wall at the upper end of the adjusting ring is provided with a limiting groove, and the jaw is pressed against the limiting groove. Bottom of the trough. .

The invention is a drill sharpener capable of arbitrarily adjusting the size of a two-slope or three-slope drill bit. Through the improvement of the static point grinding seat, as long as the adjusting ring is rotated, the height position of the movable sleeve can be controlled, thereby changing the drill clamp. The height of the sleeve inserted into the movable sleeve of the static point grinding base allows the user to grind the optimal static point size of the drill bit according to the processing conditions.

The structural features and other functions and purposes of the present invention are described in detail with reference to the embodiments of the drawings as follows:

Referring to FIG. 3, FIG. 4, and FIG. 5, the present invention is a drill bit sharpener capable of arbitrarily adjusting the size of a two-slope or three-slope drill bit. A preferred embodiment of the drill sharpener includes: There is a grinding wheel 20 on one side of the motor, a static point grinding seat 30 is arranged above the grinding wheel 20, a apex angle dressing seat 40 is arranged in front of the grinding wheel 20, and a third inclined grinding seat 50 can be arranged above and behind the grinding wheel 20; A drill bit set 60 and a drill length setting and azimuth positioning device 70 are provided on the other side of the drill sharpener 10. When performing a drill, referring to FIG. 3, a drill bit 100 is inserted into the drill sleeve set 60 using the drill length setting and orientation positioning device 70, and the drill bit 100 is fixed to the jacket set 60, and then Insert the drill sleeve set 60 into the apex angle angle dressing seat 40, so that the grinding wheel 20 grinds out the first inclined surface A1 and the apex angle θ1 of the drill bit 100; thereafter, insert the drill sleeve set 60 into the static spot grinding above The seat 30 allows the front end of the drill bit 100 to reach the grinding wheel 20 of the drill sharpener, and grinds out the clearance angle θ2 of the second inclined surface A2 at the front end of the drill bit 100 (as shown in FIG. 2), and can grind the aforementioned At the static point 105, if necessary, the drill sleeve set 60 can be inserted into the third inclined surface grinding base 50, and a third inclined surface A3 is ground at the back oblique clearance angle 104 of the drill 100.

Referring to FIGS. 6 to 9 again, the main technical feature of the present invention is that the preferred embodiment of the static-point grinding base 30 includes a fixed base 31, an adjustment ring 32, an ejector 33, and a movable sleeve. 34; Wherein, the fixing seat 31 is a rectangular block, one side of which is fixed to a vertical plate 11 (as shown in FIG. 3 and FIG. 4) of the bit sharpener 10 and is located above the grinding wheel 20, A limiting recessed hole 311 is provided on the upper surface thereof, and a through hole 312 is provided in the limiting recessed hole 311 to communicate with the lower surface and align with the grinding wheel 20. The adjusting ring 32 is implemented as a hollow ring body, so that it can be rotatably disposed in a limiting recess 311 (as shown in FIGS. 10 and 11) above the fixing base 31 and communicates with the fixing base 31. The holes 312 are coaxial, so that the adjusting ring 32 can be rotated and adjusted by the user on the fixing seat 31 (shown in FIGS. 6 and 7). The pushing member 33 is a member coupled to the inner ring surface of the adjusting ring 32, and is preferably implemented as a ring combined with the inner ring surface of the adjusting ring 32. The pushing member 33 has a The top surface 331 is provided with two downward inclined surface pushing portions 332 (as shown in FIG. 8, FIG. 10 and FIG. 12) facing upward. The movable sleeve 34 is a circular pipe body with a receiving hole 340, and is rotatably inserted in the through hole 312 of the adjusting ring 32 and the fixing seat 31 (as shown in FIGS. 10 and 11). There is a convex ring 341 around the upper end, and the convex ring 341 is located on the pushing member 33 in the adjusting ring 32. A top surface of the convex ring 341 is used to support the drill sleeve set 60 described above. One or two positioning posts 342 are provided on the surface; and one bottom surface of the convex ring 341 is provided with two upper inclined surface pushing portions 343 facing downward and abutting on the lower inclined surface pushing portion 332 (as shown in Figs. 9, 10 and 10). (Figure 12). Accordingly, the present invention can provide the user to rotate the adjustment ring 32 of the static grinding base 30, so that the adjustment ring 32 drives the pushing member 33 to rotate together, so that the lower inclined pushing portion 332 of the pushing member 33 can Push (as shown in FIG. 12) or relax (as shown in FIG. 13) the upper inclined surface of the movable sleeve 34 to push the portion 343, so that the movable sleeve 34 is raised and lowered in the adjusting ring 32, so that the adjustment can be performed. The dead point when the bit is ground.

Referring to FIG. 8, FIG. 9, FIG. 12 and FIG. 13 again, the lower inclined surface pushing portion 332 of the pushing member 33 is preferably a trapezoidal protrusion protruding toward the top surface 331. The trapezoidal protrusion The middle of the block has a lower plane 3321, two ends of the lower plane 3321 are respectively connected to a lower slope 3322, and the lower slope 3322 is diagonally connected to the top surface 331. The upper inclined surface pushing portion 343 of the movable sleeve 34 preferably includes a trapezoidal groove recessed into the bottom surface of the convex ring 341. The trapezoidal groove has an upper plane 3431 in the middle, and two ends of the upper plane 3431 are respectively An upper inclined surface 3432 is connected, and the upper inclined surface 3432 is diagonally connected to the bottom surface of the convex ring 341. Therefore, when the adjusting ring 32 drives the pushing member 33 to rotate together (as shown in FIG. 7 and FIG. 12), when the lower inclined surface pushing portion 332 and the upper inclined surface pushing portion 343 are staggered, the movement can be made. The sleeve 34 rises; conversely, when the lower inclined surface pushing portion 332 and the upper inclined surface pushing portion 343 are completely matched (as shown in FIGS. 6 and 13), the movable sleeve 34 is lowered to the lowest point, so it is inserted The drill jacket set 60 in the receiving hole 340 of the movable sleeve 34 has a height change, so that the area where the front end of the drill bit 100 contacts the grinding wheel 20 changes, and the size of the static point of the drill bit 100 can be adjusted.

Referring again to FIG. 6, FIG. 7 and FIG. 8, the preferred embodiment of the present invention further includes a fixing unit 80, which is disposed on the fixing seat 31 on the side of the adjusting ring 32 to make the fixing The unit 80 can relax the adjustment ring 32 for adjustment, and then used to clamp the adjustment ring 32. The fixing unit 80 preferably includes a clamping block 81 and a fixing screw 82. The clamping block 81 is disposed on the adjustment ring 32. Above the fixing seat 31 on one side, a clamping jaw 811 pressing against the adjusting ring 32 is protruded on one side of the clamping block 81, and the adjusting ring 32 is clamped or loosened by the clamping jaw 811; Passing through the clamping block 81 and being locked on the fixing base 31, the clamping block 81 can have a clamping or relaxing effect. Furthermore, referring to FIG. 6 and FIG. 7, the upper ring wall of the adjusting ring 32 is provided with a limiting groove 321, so that the clamping jaw 811 is pressed against the bottom of the limiting groove 321. In addition to the clamping jaw 811 being pressed by the limiting groove 321 to have a clamping or loosening effect, the rotation angle of the adjusting ring 32 can also be restricted, that is, the adjustment is performed when the two ends of the limiting groove 321 touch the clamping block 81 The end of the rotation stroke of the ring 32 allows the user to freely adjust the stroke between the two points, thereby controlling the height of the movable sleeve 34 described above.

In summary, the bit sharpener of the present invention, which can arbitrarily adjust the size of the static point of the two-slope or three-slope drill, has practicality and creativity, and the use of its technical means is also novel and undoubted, and the efficacy and design purposes Admittedly, the digital instructions can be arbitrarily scribed. Each person can be simple, clear, and easy to adjust and operate. It has been said that the reasonable progress is reasonable. To this end, an application for an invention patent was filed in accordance with the law, but I would like to ask Jun Bureau for detailed review and to grant the patent as a prayer.

100‧‧‧ drill

101‧‧‧tool bar

102‧‧‧spiral groove

103‧‧‧ cutting edge

104‧‧‧backward escape angle

105‧‧‧quiet spot

θ1‧‧‧ apex angle

θ2‧‧‧Release angle

10‧‧‧Drill Sharpening Machine

11‧‧‧ stand

20‧‧‧ Grinding wheel

30‧‧‧ Static Point Grinding Block

31‧‧‧Fixed

311‧‧‧ limit recess

312‧‧‧through hole

32‧‧‧adjustment ring

321‧‧‧ limit groove

33‧‧‧ Pusher

331‧‧‧Top

332‧‧‧Lower bevel pusher

3321‧‧‧ lower plane

3322‧‧‧bevel

34‧‧‧Sleeve

340‧‧‧Receiving hole

341‧‧‧ convex ring

342‧‧‧Positioning post

343‧‧‧Upward inclined pusher

3431‧‧‧Up Plane

3432‧‧‧Upward slope

40‧‧‧ Apex Angle Trimming Block

50‧‧‧ The third bevel grinding seat

60‧‧‧Drill Clamp Set

70‧‧‧Drill length setting and orientation positioning device

80‧‧‧Fixed unit

81‧‧‧ Clamp

811‧‧‧Jaw

82‧‧‧ set screw

A1‧‧‧First slope

A2‧‧‧Second bevel

A3‧‧‧ third slope

FIG. 1 is a schematic side view of a front end structure of a conventional double-edged drill. FIG. 2 is a schematic front view of the front end structure of a conventional double-edged drill. FIG. 3 is a schematic combination view of a preferred embodiment of a drill bit sharpener according to the present invention. FIG. 4 is an exploded view of a preferred embodiment of a drill bit sharpener according to the present invention. Fig. 5 is a side view and schematic diagram of the operation of a preferred embodiment of a sharp drill sharpening machine according to the present invention. FIG. 6 is a schematic diagram showing that the adjusting ring of the static-point grinding base of the present invention is rotated to the first position. FIG. 7 is a schematic diagram of the rotation of the adjusting ring of the static-point grinding base of the present invention to the second position. FIG. 8 is a schematic exploded top view of a preferred embodiment of the static spot grinding base of the present invention. FIG. 9 is a bottom exploded view of a preferred embodiment of the static spot grinding base of the present invention. FIG. 10 is a schematic cross-sectional view of a fixed seat and an adjustment ring of a preferred embodiment of the static spot grinding seat of the present invention. FIG. 11 is a schematic cross-sectional view of a preferred embodiment of a static-point grinding base according to the present invention. FIG. 12 is a schematic diagram of the action of lowering the movable sleeve caused by rotating the pushing member to loosen the movable sleeve according to the present invention. FIG. 13 is a schematic diagram of the action of raising the movable sleeve by the ejection member rotating and pushing the movable sleeve.

Claims (7)

A drill sharpener capable of arbitrarily adjusting the size of a two-slope or three-slope drill bit, which comprises a static point grinding seat above a grinding wheel of the drill bit grinding machine, and a drill jacket set can be inserted into the static point grinding seat. The front end of a drill bit fixed on the drill bit set extends to the grinding wheel of the drill bit grinder to grind out the two-edge apex angle and clearance angle of the drill bit front end, which is characterized in that the static point grinding seat includes a fixed seat An adjusting ring, an ejector and a movable sleeve; one side of the fixed seat is fixed to a vertical plate of the drill bit sharpener, and is located above the grinding wheel, and an upper part is provided with a communication to the lower part and The through hole of the grinding wheel is aligned; the adjusting ring is rotatably disposed on the fixing seat and is coaxial with the through hole of the fixing seat; the pushing member is a member coupled to the inner ring surface of the adjusting ring and has A top surface facing upwards, the top surface is provided with two upward slanting surfaces of the lower inclined surface; the movable sleeve is a pipe body with a receiving hole, which is rotatably passed through the adjusting ring and the fixing The through hole of the seat has a convex ring around the upper end, A convex ring is located on the pushing member in the adjusting ring, a top surface of the convex ring is supported by the drill clamp set, and a bottom surface of the convex ring is provided with two downwards and pushed against the lower inclined surface. The upper inclined surface pushing part of the upper part; the adjusting ring drives the pushing part to rotate together, the lower inclined surface pushing part pushes or relaxes the upper inclined surface pushing part, causing the movable sleeve to rise and fall in the adjusting ring to adjust the drill bit A lapping dead point; and a fixing unit disposed on the fixing base, the fixing unit clamping or relaxing the adjusting ring. As described in claim 1, the drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, wherein the pushing member is a ring coupled to the inner ring surface of the adjusting ring. As described in claim 1 or 2, the bit sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, wherein the lower bevel pushing portion includes a trapezoidal projection protruding upward from the top surface, and the trapezoidal protrusion The middle of the block has a lower plane, and two ends of the lower plane are respectively connected to a lower slope, and the lower slope is diagonally connected to the top surface. As described in claim 3, the drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, wherein the upper bevel pushing part includes a trapezoidal groove recessed into the bottom surface of the convex ring, and the middle of the trapezoidal groove An upper plane is provided, and two ends of the upper plane are respectively connected to an upper inclined plane, and the upper inclined plane is obliquely connected to the bottom surface of the convex ring. As described in claim 1, the drill sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, wherein the fixing unit is disposed on the fixing seat on one side of the adjustment ring. As described in claim 5, the bit sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, wherein the fixing unit includes a clamping block, which is arranged above the fixing seat on one side of the adjusting ring, A clamping jaw that is pressed against the adjusting ring is protruded from one side of the clamping block; and a fixing screw passes through the clamping block and is locked on the fixing base. As described in claim 6, the drill bit sharpener capable of arbitrarily adjusting the size of the two-slope or three-slope drill bit, wherein the upper wall of the adjusting ring is provided with a limiting groove, and the jaw is pressed against the limiting groove. Bottom of the trough.