CN110802447A

CN110802447A - Bit sharpening machine capable of arbitrarily adjusting dead point size of two-bevel or three-bevel bit

Info

Publication number: CN110802447A
Application number: CN201810886798.2A
Authority: CN
Inventors: 洪逸博
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2020-02-18
Anticipated expiration: 2038-08-06
Also published as: CN110802447B

Abstract

The invention discloses a drill bit sharpening machine capable of randomly adjusting the size of a dead point of a drill bit with two inclined planes or three inclined planes, wherein a dead point grinding seat is arranged above a grinding wheel of the drill bit sharpening machine, a movable sleeve into which a drill bit clamping sleeve group can be inserted is provided, the front end of a drill bit fixed in the drill bit clamping sleeve group is extended to the grinding wheel, and a first end angle of two edges, an escape angle and the dead point at the front end of the drill bit are ground; particularly, the fixed point grinding seat is provided with a rotatable adjusting ring, when the adjusting ring rotates, the adjusting ring drives a pushing piece inside the adjusting ring, and the adjusting ring can be adjusted according to the scribing indication to change the up-down position, so that the pushing piece pushes or loosens the movable sleeve through the inclined plane structure, and the movable sleeve can be lifted; therefore, the invention can adjust the height of the drill chuck set inserted into the movable sleeve and change the depth of the front end of the drill contacting the grinding wheel, thereby grinding the front end of the drill to the most appropriate front end angle and clearance escape angle according to the material of a workpiece, processing conditions and other factors.

Description

Bit sharpening machine capable of arbitrarily adjusting dead point size of two-bevel or three-bevel bit

Technical Field

The present invention relates to a drill sharpening machine, and more particularly, to a drill sharpening machine capable of grinding the leading end angle, the clearance angle and the dead point of a drill and arbitrarily adjusting the size of the dead point of a drill with two or three inclined planes.

Background

A double-edged drill (also called as a twist drill) which is a tool for drilling holes, is mainly constructed as shown in fig. 1 and 2, and includes a cylindrical tool holder 101, two helical flutes 102 extending to a machining end are formed around the tool holder 101, the machining end is ground with two cutting edges 103, an end angle θ 1 (end angle) is formed between the two cutting edges 103, a back rake clearance angle 104 is connected to the back of the cutting edge 103, the back rake clearance angle 104 has a clearance angle θ 2, and a dead point 105 is formed at a tip intersection line where the two back rake clearance angles 104 are connected. In the prior art, the manner of grinding the machining end of the drill such as the tip angle θ 1 and the relief angle θ 2 is that a user holds the drill close to a grinder, and the grinding wheel grinds the correct tip angle, relief angle and dead point by virtue of experience and skillful operation skills. However, this technique is not readily reachable and requires a buildup of actual operations and experience over the years to obtain such a technique, and often does not allow for accurate and precise trimming of the bit machining end by workers who are not skilled in bit grinding.

In order to solve the problem of manual grinding of drill bits, a special machine for sharpening drill bits has been provided in factories, wherein a drill bit clamping sleeve adjusting seat, an angle dresser and a dead point grinding seat are arranged at selected positions of a drill bit sharpening machine, and the special machine for rapidly grinding drill bits is provided by matching with at least one drill bit clamping sleeve group. The static point grinding seat of the prior drill sharpening machine is fixed above a grinding wheel and is used for grinding a back bevel clearance angle 104 and a clearance angle theta 2 of the drill and grinding a static point 105 of the tip of the drill, but the prior static point grinding seat cannot perform fine adjustment action, namely, cannot simply and quickly adjust an adjusting ring according to a scribing instruction to change the vertical position width, so that the optimal processing end of the drill cannot be ground according to the processing condition rotating speed of materials of processed workpieces and the like.

In order to solve the problem that the conventional drill grinding machine can only grind a drill with a fixed relief angle and a fixed dead point size, according to the conventional patent data, there is a drill grinding machine capable of adjusting the dead point, for example, as shown in taiwan patent publications M530207, M462164, M459951, M459956, etc., which mainly comprises a stationary point grinding seat movably pivoted on a vertical plate of the grinding machine, an adjusting screw and a fixing screw, wherein the front end of the adjusting screw passes through the stationary point grinding seat and abuts against the vertical plate or other parts, and the fixing screw is used for fixing the adjusting screw or other parts, so that the stationary point grinding seat can swing up and down by rotating the adjusting screw, thereby adjusting the angle of the dead point. However, this configuration may result in a space-free riser on one side of the mill for installing a third bevel grinding seat, or other mechanism required for grinding. This mechanism is not available for digital viewing, is difficult to adjust, and is not practical and not suitable for customers because the final adjustment result cannot be effectively grasped.

Disclosure of Invention

The invention aims to provide a drill sharpening machine capable of randomly adjusting the size of a dead point of a drill with two inclined planes or three inclined planes, which is a drill sharpening machine capable of simply adjusting the size of the dead point according to the digital indication of ruling to grind a drill by improving a dead point grinding seat of the drill sharpening machine and controlling the size of the dead point during grinding the drill by only rotating an adjusting ring of the dead point grinding seat.

In order to achieve the above object, the preferred technical solution of the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill bit of the present invention comprises: a dead point grinding seat is arranged above a grinding wheel of a drill sharpening machine, a drill clamping sleeve set can be inserted into the dead point grinding seat, the front end of a drill fixed on the drill clamping sleeve set extends to the grinding wheel of the drill sharpening machine, and the clearance angle of two edges at the front end of the drill is ground; wherein, the stationary point grinding seat comprises a fixed seat, an adjusting ring, a pushing piece and a movable sleeve; one side of the fixed seat is fixed on a vertical plate of the drill sharpening machine and is positioned above the grinding wheel, and a through hole which is communicated with the lower side and is aligned with the grinding wheel is arranged on the upper side of the fixed seat; the adjusting ring is rotatably arranged on the fixed seat and is coaxial with the through hole of the fixed seat; the pushing piece is a component combined on the inner ring surface of the adjusting ring and is provided with an upward top surface which is provided with two upward lower inclined surface pushing parts; the movable sleeve is a pipe body with a containing hole, the movable sleeve is rotatably arranged in the through holes of the adjusting ring and the fixed seat in a penetrating way, a convex ring is arranged around the upper end of the movable sleeve, the convex ring is positioned on the pushing piece in the adjusting ring, one top surface of the convex ring is supported on the drill bit clamping sleeve group, and two upper inclined plane pushing parts which are downward and close to the lower inclined plane pushing parts are arranged on one bottom surface of the convex ring; and the adjusting ring drives the pushing piece to rotate together, and the lower inclined plane pushing part pushes or releases the upper inclined plane pushing part, so that the movable sleeve is lifted in the adjusting ring to adjust the grinding dead point size of the drill bit.

More preferably, in the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill, the pushing member is a ring coupled to an inner circumferential surface of the adjusting ring.

More preferably, in the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill, the lower bevel pushing portion includes a trapezoidal projection protruding upward from the top surface, a lower plane is provided in the middle of the trapezoidal projection, two ends of the lower plane are respectively connected to a lower bevel, and the lower bevel is obliquely connected to the top surface.

More preferably, in the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill, the upper bevel pushing portion includes a trapezoidal groove recessed into the bottom surface of the convex ring, an upper plane is disposed in the middle of the trapezoidal groove, two ends of the upper plane are respectively connected to an upper bevel, and the upper bevel is obliquely connected to the bottom surface of the convex ring.

More preferably, the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill further comprises a fixing unit, the fixing unit is arranged on the fixed seat on one side of the adjusting ring, and the fixing unit clamps or loosens the adjusting ring.

More preferably, in the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill, the fixing unit comprises a clamping block, the clamping block is arranged on the fixing seat on one side of the adjusting ring, and one side of the clamping block protrudes a clamping jaw which is pressed against the adjusting ring; and a fixing screw passing through the clamping block and locked on the fixed seat.

More preferably, in the drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill, the annular wall at the upper end of the adjusting ring is provided with a limiting groove, and the clamping jaw is pressed against the bottom of the limiting groove.

The bit sharpening machine can randomly adjust the size of the dead point of a two-bevel or three-bevel bit, and the height of the movable sleeve can be controlled by rotating the adjusting ring through the improvement of the dead point grinding seat, so that the height of the movable sleeve inserted into the dead point grinding seat by the bit clamping sleeve group is changed, and a user can grind the optimal size of the dead point of the bit according to the processing conditions.

Drawings

The features and advantages of the present invention are described in detail below with reference to the accompanying drawings:

FIG. 1 is a side view of a prior art double-edged drill tip configuration.

Fig. 2 is a front view of a conventional double-edged drill tip configuration.

FIG. 3 is a schematic view of the preferred embodiment of the drill sharpening machine according to the present invention.

FIG. 4 is an exploded view of a preferred embodiment of the drill sharpening machine of the present invention.

FIG. 5 is a side view and operational schematic diagram of a preferred embodiment of the drill sharpening machine of the present invention.

FIG. 6 is a schematic view of the adjusting ring of the stationary point grinding base of the present invention rotated to a first position.

FIG. 7 is a schematic view of the adjusting ring of the stationary grinding table of the present invention rotated to a second position.

FIG. 8 is a top exploded view of a preferred embodiment of the fixed point polishing pad of the present invention.

FIG. 9 is an exploded bottom view of a preferred embodiment of the fixed point polishing pad of the present invention.

FIG. 10 is a cross-sectional view of the fixing base and the adjusting ring of the preferred embodiment of the stationary point polishing base according to the invention.

FIG. 11 is a schematic cross-sectional view of a preferred embodiment of the stationary grinding table of the present invention.

FIG. 12 is a schematic view of the downward movement of the movable sleeve caused by the pushing member rotating to release the movable sleeve according to the present invention.

FIG. 13 is a schematic view of the pushing member rotating to push the movable sleeve to lift the movable sleeve according to the present invention.

Part name:

100 drill bit, 101 cutter bar, 102 spiral flute, 103 cutting edge, 104 back rake clearance angle, 105 dead point,

theta 1 tip angle, theta 2 relief angle,

10 drill sharpening machines, 11 vertical plates, 20 grinding wheels, 30 dead point grinding seats, 31 fixed seats,

311 limit concave holes, 312 through holes,

32, a limiting groove 321 is arranged on the adjusting ring,

33 pushing piece, 331 top surface, 332 lower inclined surface pushing part, 3321 lower plane, 3322 lower inclined surface,

34 movable sleeve, 340 containing hole, 341 convex ring, 342 positioning column, 343 upper inclined plane pushing part,

3431 an upper flat surface, 3432 an upper inclined surface,

40 tip angle correcting seat, 50 third bevel grinding seat, 60 drill bit clamping sleeve set,

70 drill length setting and orientation positioning devices, 80 fixing units, 81 clamping blocks, 811 clamping jaws,

82 set screw, a1 first ramp, a2 second ramp, A3 third ramp.

Detailed Description

The invention can be further practiced in conjunction with the following drawings and specific examples, which are not intended to be limiting.

Referring to fig. 3, 4 and 5, the preferred embodiment of the drill sharpening machine of the present invention capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill comprises: a grinding wheel 20 on the motor driving side is arranged in a drill sharpening machine 10, a dead point grinding seat 30 is arranged above the grinding wheel 20, a front end angle correcting seat 40 is arranged in front of the grinding wheel 20, and a third inclined plane grinding seat 50 can be arranged above and behind the grinding wheel 20; while the drill sharpener 10 is provided on the other side with a removable drill chuck set 60 and a drill length setting and orientation positioning device 70. When the drill is performed, referring to fig. 3, a drill 100 is inserted into the drill chuck set 60 at a position where the drill 100 is positioned by using the drill length setting and orientation positioning device 70, the drill 100 is fixed to the chuck set 60, and then the drill chuck set 60 is inserted into the leading end angle adjusting seat 40, so that the grinding wheel 20 grinds the first inclined surface a1 and the leading end angle θ 1 of the drill 100; thereafter, the bit holder set 60 is inserted into the stationary grinding seat 30 above, the tip of the drill 100 is extended to the grindstone 20 of the sharpening machine, the clearance angle θ 2 of the second bevel a2 at the tip of the drill 100 is ground (as shown in fig. 2), the stationary point 105 can be ground, if necessary, the bit holder set 60 is inserted into the third bevel grinding seat 50, and a third bevel A3 is ground at the rear bevel clearance angle 104 of the drill 100.

Referring to fig. 6 to 9, the main technical feature of the present invention is that the preferred embodiment of the fixed point polishing seat 30 includes a fixed seat 31, an adjusting ring 32, a pushing member 33 and a movable sleeve 34; the fixing base 31 is a rectangular block, one side of which is fixed on a vertical plate 11 (as shown in fig. 3 and 4) of the drill sharpening machine 10 and is located above the grinding wheel 20, a limiting concave hole 311 is formed in the upper surface of the fixing base, and a through hole 312 which is communicated with the lower surface and is aligned with the grinding wheel 20 is formed in the limiting concave hole 311. The adjusting ring 32 is implemented as a hollow circular ring, and is rotatably disposed in the limiting concave hole 311 on the fixing base 31 (as shown in fig. 10 and 11), and is coaxial with the through hole 312 of the fixing base 31, so that the adjusting ring 32 can be rotated and adjusted on the fixing base 31 by a user (as shown in fig. 6 and 7). The pushing member 33 is a member combined with the inner annular surface of the adjusting ring 32, and is preferably implemented as a circular ring combined with the inner annular surface of the adjusting ring 32, the pushing member 33 has an upward top surface 331, and the top surface 331 is provided with two upward downward inclined pushing portions 332 (as shown in fig. 8, 10 and 12). The movable sleeve 34 is a circular tube with a receiving hole 340, and is rotatably inserted into the through hole 312 of the adjusting ring 32 and the fixing seat 31 (as shown in fig. 10 and 11), a protruding ring 341 is provided around the upper end of the movable sleeve, the protruding ring 341 is located on the pushing member 33 in the adjusting ring 32, a top surface of the protruding ring 341 is used for supporting the drill bit clamping set 60, and one or two positioning columns 342 are provided on the top surface of the protruding ring 341; and a bottom surface of the convex ring 341 is provided with two upper inclined plane pushing parts 343 (as shown in fig. 9, 10 and 12) which are downward and abut against the lower inclined plane pushing part 332. Therefore, the invention can provide the user to rotate the adjusting ring 32 of the dead point grinding seat 30, so that the adjusting ring 32 drives the pushing member 33 to rotate together, and the lower inclined plane pushing part 332 of the pushing member 33 can push (as shown in fig. 12) or loosen (as shown in fig. 13) the upper inclined plane pushing part 343 of the movable sleeve 34, so that the movable sleeve 34 can be lifted in the adjusting ring 32, and the dead point when the grinding of the drill bit is finished can be adjusted.

Referring to fig. 8, 9, 12 and 13, the lower inclined pushing portion 332 of the pushing member 33 is preferably a trapezoidal protrusion protruding upward from the top surface 331, the trapezoidal protrusion having a lower plane 3321 in the middle thereof, two ends of the lower plane 3321 being respectively connected to a lower inclined surface 3322, and the lower inclined surface 3322 being obliquely connected to the top surface 331. The upper inclined pushing portion 343 of the movable sleeve 34 preferably comprises a trapezoidal groove recessed into the bottom surface of the convex ring 341, the trapezoidal groove has an upper plane 3431 in the middle, two ends of the upper plane 3431 are respectively connected to an upper inclined surface 3432, and the upper inclined surface 3432 is obliquely 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 12), the lower inclined pushing portion 332 and the upper inclined pushing portion 343 are staggered, so as to lift the movable sleeve 34; on the contrary, when the lower inclined pushing part 332 is rotated to be completely engaged with the upper inclined pushing part 343 (as shown in fig. 6 and 13), the movable sleeve 34 is lowered to the lowest point, so that the bit holder set 60 inserted into the receiving hole 340 of the movable sleeve 34 has a height variation, an area of the front end of the bit 100 contacting the grinding wheel 20 is changed, and the size of the dead point of the bit 100 can be adjusted.

Referring to fig. 6, 7 and 8, the preferred embodiment of the present invention further includes a fixing unit 80, wherein the fixing unit 80 is disposed on the fixing base 31 at one side of the adjusting ring 32, so that the fixing unit 80 can loosen the adjusting ring 32 for adjustment and then clamp the adjusting ring 32; the fixing unit 80 preferably includes a clamping block 81 and a fixing screw 82; the clamping block 81 is arranged on the upper surface of the fixed seat 31 at one side of the adjusting ring 32, one side of the clamping block 81 protrudes a clamping jaw 811 which is pressed against the adjusting ring 32, and the adjusting ring 32 is clamped or loosened by the clamping jaw 811; the fixing screw 82 passes through the clamping block 81 and is locked on the upper surface of the fixing seat 31, so that the clamping block 81 can generate a clamping or loosening effect. Referring to fig. 6 and 7, the wall of the upper end of the adjusting ring 32 is provided with a limiting groove 321, so that the jaw 811 abuts against the groove bottom of the limiting groove 321, the limiting groove 321 not only allows the jaw 811 to abut against and have the function of clamping or loosening, but also limits the rotation angle of the adjusting ring 32, i.e. the end point of the rotation stroke of the adjusting ring 32 when the two ends of the limiting groove 321 abut against the clamping block 81, so that the stroke of the user between two points can be freely adjusted by rotation, thereby controlling the height of the movable sleeve 34.

In summary, the present invention can arbitrarily adjust the size of the dead point of the drill bit with two or three inclined planes, which has been proven to have practical and creative properties, the application of the technical means is novel and undoubted, the efficacy and the design purpose are perfectly in line, the digital indication can be arbitrarily marked according to the scoring, and everyone can simply, clearly and conveniently adjust and operate, which is called to be reasonably improved to the clear.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. The utility model provides a bit sharpening machine of two inclined planes of ability arbitrary adjustment or three inclined planes drill dead point size which characterized in that, it contains: a dead point grinding seat is arranged above a grinding wheel of a drill sharpening machine, a drill clamping sleeve set can be inserted into the dead point grinding seat, the front end of a drill fixed on the drill clamping sleeve set extends to the grinding wheel of the drill sharpening machine, and a first end angle and a clearance angle of two blades at the front end of the drill are ground; wherein, the stationary point grinding seat comprises a fixed seat, an adjusting ring, a pushing piece and a movable sleeve; one side of the fixed seat is fixed on a vertical plate of the drill sharpening machine and is positioned above the grinding wheel, and a through hole which is communicated with the lower side and is aligned with the grinding wheel is arranged on the upper side of the fixed seat; the adjusting ring is rotatably arranged on the fixed seat and is coaxial with the through hole of the fixed seat; the pushing piece is a component combined on the inner ring surface of the adjusting ring and is provided with an upward top surface which is provided with two upward lower inclined surface pushing parts; the movable sleeve is a pipe body with a containing hole, the movable sleeve is rotatably arranged in the through holes of the adjusting ring and the fixed seat in a penetrating way, a convex ring is arranged around the upper end of the movable sleeve, the convex ring is positioned on the pushing piece in the adjusting ring, one top surface of the convex ring is supported on the drill bit clamping sleeve group, and two upper inclined plane pushing parts which are downward and close to the lower inclined plane pushing parts are arranged on one bottom surface of the convex ring; and the adjusting ring drives the pushing piece to rotate together, and the lower inclined plane pushing part pushes or releases the upper inclined plane pushing part, so that the movable sleeve is lifted in the adjusting ring to adjust the grinding dead point of the drill bit.

2. The drill sharpener capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill bit as claimed in claim 1, wherein the ejector is a circular ring combined with the inner annular surface of the adjusting ring.

3. The drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill as claimed in claim 1 or 2, wherein the lower bevel pushing portion comprises a trapezoidal projection projecting upward from the top surface, the trapezoidal projection having a lower flat surface in the middle thereof, two ends of the lower flat surface being respectively connected to a lower bevel, the lower bevel surface being obliquely connected to the top surface.

4. The drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill as claimed in claim 3, wherein the upper bevel pushing portion comprises a trapezoidal groove recessed into the bottom surface of the convex ring, the trapezoidal groove has an upper flat surface in the middle, two ends of the upper flat surface are respectively connected to an upper bevel, and the upper bevel is obliquely connected to the bottom surface of the convex ring.

5. The drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill as claimed in claim 1, further comprising a fixing unit disposed on the fixing base on one side of the adjusting ring, the fixing unit clamping or releasing the adjusting ring.

6. The drill sharpening machine capable of arbitrarily adjusting the size of the dead point of the two-bevel or three-bevel drill as claimed in claim 5, wherein the fixing unit comprises a clamping block, the clamping block is disposed on the fixing seat at one side of the adjusting ring, and a clamping jaw which is pressed against the adjusting ring is protruded at one side of the clamping block; and a fixing screw passing through the clamping block and locked on the fixed seat.

7. The bit sharpener of claim 6, wherein the upper ring wall of the adjusting ring has a limiting groove, and the jaws are pressed against the bottom of the groove.