CN114871863A

CN114871863A - Method for grinding drill bit by using universal rapid grinding and drilling machine

Info

Publication number: CN114871863A
Application number: CN202210384968.3A
Authority: CN
Inventors: 徐武民
Original assignee: Zhejiang Jiahong Tool Manufacturing Co ltd
Current assignee: Zhejiang Jiahong Tool Manufacturing Co ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-08-09
Anticipated expiration: 2042-04-13
Also published as: CN114871863B

Abstract

The invention discloses a method for grinding a drill bit by using a universal rapid grinding and drilling machine, which comprises the following steps: the device comprises a drill clamp, a drill positioning device, a main cutting edge positioning and grinding device and a chisel edge positioning and grinding device; inserting a drill bit clamp into a positioning support, inserting a drill bit into a drill bit adapter sleeve, penetrating a clamping piece to be abutted against a positioning terminal, completing positioning when a left positioning slide block and a right positioning slide block are abutted against corresponding drill bit outer side tips and the rear side of a right end face of a front side convex block and the front side of a left end face of a rear side convex block are abutted against a front cutter face of the drill bit, and finally clamping the drill bit in the drill bit clamp; grinding a main cutting edge of the drill; and step three, grinding the chisel edge of the drill. The method for grinding the drill bit by using the universal quick grinding machine has the advantages that aiming at twist drill bits to be ground with different diameters, debugging on the positioning reference of the grinding machine is not needed, clamping and positioning are simple and quick, universality is strong, time consumption is low, efficiency is high, grinding quality of the drill bit is high, and service life is long.

Description

Method for grinding drill bit by using universal rapid grinding and drilling machine

Technical Field

The invention relates to a method for grinding a drill bit, in particular to a method for grinding the drill bit by using a universal quick grinding machine, which can quickly clamp and position the drill bit and realize quick grinding of a cutting edge of the drill bit.

Background

In the machining process, hand drills and bench drills are widely used, but when the drill bits of the hand drills or bench drills are dull, the cutting edges of the hand drills or bench drills need to be ground before the hand drills or bench drills can be reused. Currently, most abrasive drilling methods are grinding with a hand-held drill on a grinder. The manual grinding drill bit mainly depends on the experience of operators, and because the end part of the drill bit has strict requirements on the size (refer to the attached figures 21 and 22, the end part of the drill bit mainly comprises a main cutting edge 0-1, a chisel edge 0-2, an auxiliary cutting edge (edge) 0-3 and a vertex angle a), the manual grinding drill bit is difficult to master the technical requirements of various angles, symmetry, smoothness, grinding amount and the like, the cutting capability of the cutting edge of the drill bit is reduced, the service life of the drill bit is greatly reduced, and certain safety risk exists.

The application number is 02270832.4's a small-size electronic drill bit machine that grinds, it includes base (1), motor (2), emery wheel (3), be used for anchor clamps (4) of centre gripping drill bit and bearing structure thereof, emery wheel (3) are installed on motor (2) output shaft, motor (2) set up on base (1), bearing structure includes knife rest (5), anchor clamps rotationally install on the knife rest, knife rest (5) and anchor clamps (4) set up in the front of emery wheel (3). The appearance of the grinding and drilling machine is an improvement on manual grinding and drilling, but the following defects still exist: 1. the clamping and positioning steps are multiple, and the time is long; 2. metal chips generated after the drill bit is ground splash everywhere and are not easy to clean; 3. the structure is complex, and subsequent debugging and maintenance are not easy.

The inventor of the present application has proposed a technical improvement to the above technical drawback many years ago (see paragraphs [0020] - [0026] of "grinding and drilling machine" specification with application number 201621269580.5):

the motor 2 is fixed on the base 1, the carborundum wheel 3 is fixedly connected with the motor 2, and the motor 2 drives the carborundum wheel 3 to rotate. Its drill bit positioner includes: be fixed in base 1 to knife rest 4, including ring portion 41 and fixed part 42 to knife rest 4, fixed part 42 passes through the riser to be fixed on base 1, and ring portion 41 and fixed part 42 reciprocal anchorage, fixed part 42 have dog 421, and the afterbody of dog 421 is equipped with the screw thread, and the axial position of dog 421 can be adjusted to the regulation screw thread. Its drill chuck 9 includes cone 91, swivel nut 92 and kicking block 93, cone 91 is fixed in swivel nut 92, kicking block 93 sets up on cone 91, ring portion 41 has recess 411, when the swivel nut of drill chuck 9 block in to knife rest 4, kicking block 93 block in recess 411, two shell fragment 5 movably are fixed in to knife rest 4, it separately to promote two shell fragment 5 when dialling button 6 and rotating, particularly, the both ends that two shell fragment 5 kept away from each other are fixed respectively at the fixed part 42 to knife rest 4, the other end can the activity each other. Its main cutting edge location grinding device includes: the holder 7 has a first positioning hole 71 on the front side of the emery wheel 3. Its chisel edge location grinding device includes: the stand 8 has a second positioning hole 81 located above the emery wheel 3. The drill chuck 9 is detachably fixed on the base 1, and the drill chuck 9 is matched with the tool setting frame 4. The drill grinding machine further comprises a support sleeve 72 which is fixed on the support 7 and located at the first positioning hole 71, and the drill chuck 9 is matched with the support sleeve 72. The threaded sleeve 92 of the drill chuck 9 is threadably connected to and disconnected from the support sleeve 72. The drilling and milling machine further comprises a cover plate 82 which is fixed on the vertical frame 8 and located at the second positioning hole 81, and the drill chuck 9 is matched with the cover plate 82. The threaded sleeve 92 of the drill chuck is threadably attachable to and detachable from the cover plate 82.

The grinding and drilling machine is characterized in that a drill bit is clamped in a drill chuck at a preset circumferential position (circumferential angle) and a preset axial position (axial reference), then the drill chuck with the drill bit clamped is respectively inserted and matched in a main cutting edge positioning and grinding device and a chisel edge positioning and grinding device, the main cutting edge positioning and grinding device and the chisel edge positioning and grinding device are designed according to the circumferential angle and the axial reference of the drill bit in the drill chuck, a main cutting edge of the drill bit inserted and matched in the main cutting edge positioning and grinding device just collides with a grinding wheel for grinding, a chisel edge of the drill bit inserted and matched in the chisel edge positioning and grinding device just collides with the grinding wheel for grinding, and the grinding amount of the drill bit and the chisel edge are determined by the preset axial reference of the drill bit. The improvement has the advantages that the drill bit clamping and positioning are simple and rapid, the drill bit grinding becomes simple and efficient, and the improvement is a breakthrough progress in the industry. However, in practical applications, the inventor finds that the technical solution still has major technical defects: 1. the universality is poor: to the twist drill bits of different diameters, the screw pitch that its edge spiral rises is different, utilize the mode of two shell fragment 5 tight edges of clamp to fix a position little drill bit and big drill bit respectively, the dwell position and the angle of little drill bit main cutting edge and chisel edge and the dwell position and the angle of big drill bit main cutting edge and chisel edge have very big difference, this has just caused because of the commonality of location is relatively poor, need correspondingly debug the axial height of dog 421, this is with regard to greatly reduced grinding efficiency, it can also seriously influence grinding quality to debug highly improper. 2. When the drill bit is ground, the structure of the bracket 7 ensures that the drill bit can only feed grinding amount along a single axial direction, so that for the drill bit with a larger diameter, the main rear cutter face cannot be sufficiently ground, and the grinding quality is also influenced.

Disclosure of Invention

The invention aims to provide a method for grinding a drill bit by using a universal quick grinding machine, aiming at twist drill bits to be ground with different diameters, the positioning reference of the grinding machine is not required to be debugged, the clamping and positioning are simple and quick, the universality is strong, the consumed time is less, the efficiency is high, the grinding quality of the drill bit is high, and the service life is long.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method of grinding a drill bit using a universal rapid grind drill, the universal rapid grind drill comprising: the drill bit clamp comprises a drill bit jacket, a locking tray and a plurality of clamping pieces, wherein the locking tray and the clamping pieces are arranged in the drill bit jacket in a sliding mode; the drill bit positioning device comprises a positioning support arranged on the bottom shell, and a positioning terminal fixedly arranged on the lower part of the positioning support and used for axially positioning a drill bit, wherein the upper end part of the positioning support is provided with a first circular ring port matched with a drill bit jacket of a drill bit clamp; a left positioning slide block is arranged on the left side of the positioning bracket, a right positioning slide block is arranged on the right side of the positioning bracket, a front side convex block extending rightwards is arranged at the upper end of the left positioning slide block, a left positioning slide block inclined plane is arranged on the rear side of the front side convex block, a rear side convex block extending leftwards is arranged at the upper end of the right positioning slide block, and a right positioning slide block inclined plane is arranged on the front side of the rear side convex block; the method comprises the following steps:

the method comprises the following steps: positioning and fastening of drill bit in drill bit holder

Inserting the drill bit clamp into the positioning bracket, clamping the two symmetrically arranged drill bit clamp positioning convex blocks in the corresponding first positioning clamping openings, inserting the drill bit into the drill bit fastening sleeve and penetrating the clamping pieces, and separating the left positioning slide block and the right positioning slide block towards the left side and the right side by rotating the adjusting pull finger to overcome the elasticity of the slide block driving mechanism so that the drill bit can continuously push downwards to contact the positioning terminals;

when the front end of the drill bit is abutted to the positioning terminal, the drill bit stops being pressed downwards to enable the drill bit to be in a free state, the adjusting pull finger is released, the left positioning slide block and the right positioning slide block are folded under the elastic action of the slide block driving mechanism, the right end face of the front side convex block is abutted to one drill bit outer side tip of the drill bit, the left end face of the rear side convex block is abutted to the other drill bit outer side tip of the drill bit, so that the drill bit is driven to rotate, and when the rear side of the right end face of the front side convex block and the front side of the left end face of the rear side convex block are abutted to the front cutter point of the drill bit, the left positioning slide block and the right positioning slide block are blocked, so that positioning is completed;

screwing the drill bit jacket downwards to enable the drill bit jacket to drive the locking tray to move downwards along the guide groove, the locking tray presses the clamping piece downwards, the inclined surface of the clamping piece is extruded by the inner wall of the conical section to move inwards to clamp the drill bit, and at the moment, the drill bit fastening sleeve, the drill bit jacket, the locking tray, the clamping piece and the drill bit are fastened together to form a drill bit clamp whole;

step two: grinding of the main cutting edge of a drill

The whole drill bit clamp is pulled out of the positioning support and inserted into a rotating sleeve of the main cutting edge positioning and grinding device, two symmetrically arranged drill bit clamp positioning convex blocks are clamped in corresponding second positioning clamping ports, a dustproof switch is started, a CBN grinding wheel is driven by a motor to grind one main cutting edge of the drill bit, and after grinding is finished, the drill bit clamp is pulled out and integrally rotated by 180 degrees and inserted into the rotating sleeve again to grind the other main cutting edge of the drill bit;

step three: grinding of chisel edges of drill bits

After the main cutting edge is ground, the drill clamp is integrally pulled out and inserted into the fixed support, the two symmetrically-arranged drill clamp positioning convex blocks are clamped in the corresponding third positioning clamping openings, the chisel edge of the drill is ground through the CBN grinding wheel 27, and after the grinding is finished, the drill clamp is pulled out and integrally rotated 180 degrees and then inserted into the fixed support again for grinding again.

Step four: in the second step, before the two main cutting edges are ground, the whole drill bit clamp is pushed to rotate by a preset angle along with the support sleeve around the pivot pin according to needs, then the locking knob is screwed down to fix the support sleeve, and the preset angle is the scale range of 110 degrees and 135 degrees marked on the shell.

Step five: in the second step, when the main cutting edge is ground, the rotating sleeve is rotated repeatedly within the range of 0-60 degrees, so that the main rear cutter face has a preset radian, and the service life of the ground drill is prolonged.

Compared with the prior art, the invention has the beneficial effects that: by adopting the grinding method, the drill bit is creatively positioned by the outer side tip and the front cutter face of the drill bit, and the problems of poor universality in the prior art are perfectly solved: to the twist drill bits that the diameter is different, need debug the axial height of dog 421 correspondingly, this grinding efficiency that has just been lower greatly, and the high improper still can seriously influence this technological problem of grinding quality of debugging, to the different grinding twist drill bits of treating of diameter, all need not to debug the location benchmark of abrasive drilling machine, and the clamping location is simple swift, and is consuming time few, efficient, the grinding high quality of drill bit, life prolongs greatly.

The further beneficial effects are that: the whole drill bit clamp is pushed to rotate by a preset angle around the shaft pin along with the support sleeve according to needs, then the locking knob is screwed to fix the support sleeve, the grinding method for adjusting the support sleeve to rotate by the preset angle around the shaft pin and grinding the included angle a after the support sleeve is fixed according to needs can meet the grinding requirements of two main cutting edges, in order to facilitate the adjustment of the support sleeve to rotate by the preset angle around the shaft pin, 110 degrees and 135 degrees are marked on the casing, for example, 110 degrees are selected when the drill bit is used for drilling materials such as hardwoods, aluminum alloys and the like, 118 degrees are selected when the drill bit is used for drilling common steel materials, and 135 degrees are selected when the drill bit is used for drilling materials such as cast iron, concrete and the like. The main cutting edge ground in this way is more convenient and faster, and the drilling quality of the drill bit can be further improved. When the main cutting edge is ground, the rotating sleeve is rotated for a plurality of times in a reciprocating manner within the range of 0-60 degrees, the radian required by the main rear cutter face can be ground, and the service life of the ground drill bit is longer.

Drawings

FIG. 1 is a schematic illustration of a disassembled structure of a general purpose rapid grinding and drilling machine used in the present invention;

FIG. 2 is a schematic view of the assembled construction of FIG. 1 with the bit holder omitted;

FIG. 3 is a schematic view of the assembled structure of FIG. 1 with the drill bit and the upper dust cap omitted;

FIG. 4 is a schematic view of the engagement of the bit holder and bit locator of FIG. 1;

FIG. 5 is a schematic view of the alternative orientation of the bit holder and bit retainer of FIG. 1;

FIG. 6 is a schematic view of a positioning structure of the drill bit of FIG. 1;

FIG. 7 is a cross-sectional view taken along line M-M of FIG. 6 prior to positioning of the drill bit;

FIG. 8 is a cross-sectional view taken along line M-M of the drill bit of FIG. 6 after positioning;

FIG. 9 is a schematic perspective view of FIG. 8;

FIG. 10 is a schematic view of the other orientation of FIG. 6;

FIG. 11 is a schematic top view of the left positioning slider, the positioning terminal and the right positioning slider of FIG. 1;

FIG. 12 is a left side view of the right positioning block of FIG. 1;

FIG. 13 is an enlarged view of the left and right positioning blocks of FIG. 1;

FIG. 14 is a schematic view of the structure of a single clip of FIG. 1;

FIG. 15 is a schematic view of the structure of the rotating sleeve of FIG. 1;

FIG. 16 is a schematic view of the rotary sleeve of FIG. 1 in positional relationship to a positioning sleeve;

FIG. 17 is a schematic view of the connection between the rotating sleeve and the fixed bracket in FIG. 1;

FIG. 18 is a schematic view of the bit holder of FIG. 1 inserted into the rotating sleeve in a state of grinding of the main cutting edge;

FIG. 19 is a schematic view of the bit holder insert mounting bracket of FIG. 1 in a chisel edge grinding configuration;

FIG. 20 is a schematic circuit diagram of a universal rapid milling and drilling machine;

FIG. 21 is a schematic view of the construction of a twist drill;

fig. 22 is a schematic view of the structure of the bit part of fig. 21.

The technical features represented by the reference numerals in the figures are as follows:

a drill bit fastening sleeve 1, a drill bit jacket 2, a drill bit clamp positioning lug 2-1, a locking tray 3, a clamp piece sliding groove 3-1, a ring groove 3-2, a clamp piece 4, an LED lamp 5, a positioning bracket 6, a first ring port 6-1, a first clamp positioning bayonet 6-2, a dustproof switch 7, an upper dustproof cover 8, a rotating sleeve 9, a second ring port 9-1, a second positioning bayonet 9-2, a lower end section 9-3, a positioning sleeve 10, a positioning pin 11, a shaft pin snap spring 12, a shaft pin 13, a supporting sleeve 14, a dustproof sleeve 15, a dustproof sleeve snap spring 16, an upper shell 17, a window 17-1, a locking washer 18, a locking knob 19, a fixing bracket 20, a third ring port 20-1, a third positioning bayonet 20-2, a side dustproof cover 21, an adjusting pull finger 22, an open retainer ring 23, an adjusting shaft 24 and a motor 25, grinding wheel connector 26, CBN grinding wheel 27, positioning shaft 28, flat pad 29, positioning spring 30, left positioning slide block 31, front side bump 31-1, front side bump right end face 31-2, left positioning slide block inclined face 31-3, front side bump right end face rear side 31-4, positioning terminal 32, right positioning slide block 33, rear side bump 33-1, rear side bump left end face 33-2, right positioning slide block inclined face 33-3, rear side bump left end face front side 33-4, front adjusting cam 34, rear adjusting cam 35, rectifier 36, grinding wheel clamp plate 37, base 38, transparent cover 39, soft foot 40, cable 41, drill 42, main cutting edge 0-1, cross edge 0-2, auxiliary cutting edge (edge) 0-3, apex angle a, rake face 0-4, main rake face 0-5, drill outer side tip 0-6, and (4) 0-7 parts of unknown edges.

Detailed Description

In order to make the technical solution of the present invention clearer, the present invention will be described in detail with reference to fig. 1 to 22. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Example 1

The invention is a method of grinding a drill bit using a universal rapid milling and drilling machine comprising: the drill bit clamp comprises a drill bit jacket 2, a locking tray 3 and a plurality of clamping pieces 4 which are arranged in the drill bit jacket 2 in a sliding mode, a locking tray 3 and a plurality of clamping pieces 4, wherein the locking tray 3 and the clamping pieces 4 are arranged in the drill bit jacket 2 in a sliding mode, an inclined plane 4-1 at the lower portion of the outer side of each clamping piece 4 is matched with the inner wall of a conical section 2-2 at the middle lower portion of the drill bit jacket 2, the upper end of each clamping piece 4 is arranged in a clamping piece sliding groove 3-1 corresponding to the lower end of the locking tray 3 in a sliding mode, the upper end of the drill bit jacket 2 is in threaded connection with a drill bit fastening sleeve 1, and an annular groove 3-2 at the upper end of the locking tray 3 is clamped on a convex ring 1-1 of the side wall, extending downwards, of the drill bit fastening sleeve 1; the drill bit positioning device comprises a positioning support 6 arranged on a bottom shell 38, and a positioning terminal 32 fixedly arranged on the lower part of the positioning support 6 and used for axially positioning a drill bit 42, wherein the upper end part of the positioning support 6 is provided with a first annular port 6-1 matched with a drill bit jacket 2 of a drill bit clamp; a left positioning slide block 31 is arranged on the left side of the positioning bracket 6, a right positioning slide block 33 is arranged on the right side of the positioning bracket 6, a front side convex block 31-1 extending rightwards is arranged at the upper end of the left positioning slide block 31, a left positioning slide block inclined plane 31-3 is arranged on the rear side of the front side convex block 31-1, a rear side convex block 33-1 extending leftwards is arranged at the upper end of the right positioning slide block 33, and a right positioning slide block inclined plane 33-3 is arranged on the front side of the rear side convex block 33-1; the using method comprises the following steps:

Inserting the drill bit clamp into the positioning bracket 6, clamping two symmetrically arranged drill bit clamp positioning convex blocks 2-1 into the corresponding first positioning bayonets 6-2, inserting the drill bit 42 into the drill bit adapter sleeve 1 and penetrating the clamping pieces 4, and separating the left and

right positioning sliders

31 and 33 towards the left and right sides by rotating the adjusting pull finger 22 to overcome the elasticity of the slider driving mechanism so that the drill bit 42 can continuously push and contact the positioning terminal 32 downwards;

when the front end of the drill bit 42 is abutted against the positioning terminal 32, the drill bit 42 is stopped being pressed downwards to enable the drill bit 42 to be in a free state, the adjusting pull finger 22 is released, the left and

right positioning sliders

31 and 33 are folded under the elastic action of the slider driving mechanism, the right end face 31-2 of the front convex block is abutted against one drill bit outer side tip 0-6 of the drill bit 42, the left end face 33-2 of the rear convex block is abutted against the other drill bit outer side tip 0-6 of the drill bit 42, so that the drill bit 42 is driven to rotate, and when the rear side 31-4 of the right end face of the front convex block and the front side 33-4 of the left end face of the rear convex block are abutted against the front cutter face 0-4 of the drill bit 42, the left and

right positioning sliders

31 and 33 are blocked, and positioning is completed;

screwing the drill bit jacket 2 downwards to enable the drill bit jacket 2 to drive the locking tray 3 to move downwards along the guide groove, the locking tray 3 presses the clamping piece 4 downwards, the inclined surface 4-1 of the clamping piece 4 is extruded by the inner wall of the conical section 2-2 to move inwards to clamp the drill bit 42, and at the moment, the drill bit fastening sleeve 1, the drill bit jacket 2, the locking tray 3, the clamping piece 4 and the drill bit 42 are fastened together to form a drill bit clamp whole;

step two: grinding of the main cutting edge of a drill

The whole drill bit clamp is pulled out of the positioning support 6 and inserted into a rotating sleeve 9 of the main cutting edge positioning and grinding device, two symmetrically arranged drill bit clamp positioning convex blocks 2-1 are clamped in corresponding second positioning bayonets 9-2, a dustproof switch 7 is started, a motor 25 drives a CBN grinding wheel 27 to grind one main cutting edge 0-1 of the drill bit 42, after grinding is completed, the drill bit clamp is pulled out and integrally rotated 180 degrees and inserted into the rotating sleeve 9 again, and the other main cutting edge 0-1 of the drill bit 42 is ground;

step three: grinding of chisel edges of drill bits

After the main cutting edge is ground, the drill chuck is integrally pulled out and inserted into the fixed support 20, the two symmetrically arranged drill chuck positioning convex blocks 2-1 are clamped in the corresponding third positioning bayonets 20-2, the chisel edge 0-2 of the drill 42 is ground through the CBN grinding wheel 27, and after the grinding is finished, the drill chuck is pulled out and integrally rotated 180 degrees and then inserted into the fixed support 20 for grinding again.

Step four: in the second step, before grinding the two main cutting edges 0-1, the whole drill bit clamp is pushed to rotate around the shaft pin 13 by a preset angle according to the requirement along with the support sleeve 14, and then the locking knob 19 is screwed to fix the support sleeve 14, wherein the preset angle is the scale range of 110 plus 135 degrees marked on the machine shell.

Step five: in the second step, when the main cutting edge is ground, the rotating sleeve 9 is rotated back and forth for a plurality of times within the range of 0-60 degrees, so that the main rear cutter face has a preset radian, and the service life of the ground drill is prolonged.

Example 2

The universal rapid grinding and drilling machine used by the invention comprises a machine shell formed by covering a bottom shell 38 and an upper shell 17 together, a motor 25 arranged on the bottom shell 38 and used for driving a CBN grinding wheel 27 to rotate, a drill bit clamp, a drill bit positioning device, a main cutting edge positioning and grinding device and a chisel edge positioning and grinding device,

the drill bit clamp comprises a drill bit jacket 2, a locking tray 3 and a plurality of clamping pieces 4, wherein the locking tray 3 and the clamping pieces 4 are slidably arranged in the drill bit jacket 2, an inclined plane 4-1 at the lower part of the outer side of each clamping piece 4 is matched with the inner wall of a conical section 2-2 at the middle lower part of the drill bit jacket 2, the upper end of each clamping piece 4 is slidably arranged in a corresponding clamping piece sliding groove 3-1 at the lower end of the locking tray 3, the upper end part of the drill bit jacket 2 is in threaded connection with a drill bit adapter sleeve 1, and an annular groove 3-2 at the upper end of the locking tray 3 is clamped on a convex ring 1-1 of the side wall, extending downwards, of the drill bit adapter sleeve 1;

the drill bit positioning device comprises a positioning support 6 arranged on a bottom shell 38, and a positioning terminal 32 fixedly arranged on the lower part of the positioning support 6 and used for axially positioning a drill bit 42, wherein the upper end part of the positioning support 6 is provided with a first annular port 6-1 matched with a drill bit jacket 2 of a drill bit clamp;

a left positioning slide block 31 is arranged on the left side of the positioning bracket 6, a right positioning slide block 33 is arranged on the right side of the positioning bracket 6, a front side convex block 31-1 extending rightwards is arranged at the upper end of the left positioning slide block 31, a left positioning slide block inclined plane 31-3 is arranged on the rear side of the front side convex block 31-1, a rear side convex block 33-1 extending leftwards is arranged at the upper end of the right positioning slide block 33, and a right positioning slide block inclined plane 33-3 is arranged on the front side of the rear side convex block 33-1;

when the drill bit jacket 2 is inserted into the positioning bracket 6, two symmetrically arranged drill bit clamp positioning lugs 2-1 on the drill bit jacket 2 are clamped in corresponding first positioning bayonets 6-2 on the first circular port 6-1, under the condition, when a drill bit 42 to be ground is inserted into the drill bit clamp, the front end of the drill bit 42 passes through the clamping piece 4, the left and right positioning sliders 31 and 33 are separated to the left and right sides by rotating the adjusting pull finger 22 to overcome the elasticity of the slider driving mechanism so as to enable the front end of the drill bit 42 to be in top contact with the positioning terminal 32, under the condition, the drill bit 42 is in a free state, the left and right positioning sliders 31 and 33 are folded under the elasticity of the slider driving mechanism, the right end surface 31-2 of the front side lug is in top contact with one drill bit outer side tip 0-6 of the drill bit 42, the left end surface 33-2 of the rear side lug is in top contact with the other drill bit outer side tip 0-6 of the drill bit 42, thereby driving the drill bit 42 to rotate, when the rear side 31-4 of the right end surface of the front side lug and the front side 33-4 of the left end surface of the rear side lug are abutted against the front tool surface 0-4 of the drill bit 42, the left and right positioning sliding blocks 31 and 33 are blocked, and the positioning is completed, in this state, the drill bit jacket 2 is screwed downwards, the drill bit jacket 2 drives the locking tray 3 to descend along the guide groove, the locking tray 3 presses the clamping piece 4 downwards, and the inclined surface 4-1 of the clamping piece 4 is extruded by the inner wall of the conical section 2-2 to move inwards, thereby clamping the positioned drill bit 42.

Preferably, the main cutting edge positioning and grinding device comprises a rotating sleeve 9, wherein the upper end part of the rotating sleeve 9 is provided with a second annular port 9-1 matched with the drill bit jacket 2 of the drill bit clamp; when the drill bit jacket 2 is inserted into the rotating sleeve 9, two symmetrically arranged drill bit clamp positioning lugs 2-1 on the drill bit jacket 2 are clamped in corresponding second positioning bayonets 9-2 on the second circular ring port 9-1.

As a further preferred, the chisel edge positioning grinding device comprises a fixing bracket 20 arranged on the bottom shell 38, wherein the fixing bracket 20 is provided with a third annular port 20-1 matched with the drill jacket 2 of the drill chuck; when the drill bit jacket 2 is inserted into the fixing support 20, two symmetrically arranged drill bit clamp positioning lugs 2-1 on the drill bit jacket 2 are clamped in corresponding third positioning bayonets 20-2 on the third circular ring port 20-1. The third annular port 20-1 may be capped with a side dust cap 21 when the burr is not in use.

Preferably, the main cutting edge positioning and grinding device further comprises a support sleeve 14, two support lugs at the lower part of the support sleeve 14 are hinged in corresponding hinge holes of a vertical plate of the fixed support 20 through a shaft pin 13, a shaft pin clamp spring 12, a lower end section 9-3 of the rotating sleeve 9 is sleeved in an inner hole of the support sleeve 14, a dustproof sleeve 15 is sleeved at the lower end of the lower end section 9-3 penetrating through the inner hole of the support sleeve 14, and the dustproof sleeve 15 is stopped by a dustproof sleeve clamp spring 16.

Preferably, a locking knob 19 used for locking the support sleeve 14 against rotation is arranged on the right side of the upper shell 17, a locking washer 18 is sleeved on the locking knob 19, and in such a structure, a drill bit clip inserted in the rotating sleeve can rotate around a shaft pin along with the support sleeve; in order to facilitate the adjustment of the support sleeve to rotate a preset angle around the shaft pin, the casing is marked with 110 degrees and 135 degrees, for example, 110 degrees is selected when the drill is used for drilling hardwood, aluminum alloy and the like, 118 degrees is selected when the drill is used for drilling common steel, and 135 degrees is selected when the drill is used for drilling cast iron, concrete and the like. The main cutting edge ground in this way meets the actual requirements better, and the drilling quality of the drill can be further improved. Preferably, the upper end of the supporting sleeve 14 is provided with a positioning pin 11 sleeved with a positioning sleeve 10, and a baffle plate 9-4 for stopping the lower end of the rotating sleeve 9 is used for limiting the maximum angle of rotation of the rotating sleeve 9 in the inner hole of the supporting sleeve 14 to be 60 degrees. When the grinding and drilling machine is not used, the second annular port 9-1 of the rotating sleeve 9 can be covered with the dust cover 8.

Preferably, the slide block driving mechanism includes positioning shafts 28 disposed on the left and right sides of the positioning bracket 6, the left positioning slide block 31 and the right positioning slide block 33 are slidably sleeved on the corresponding positioning shafts 28, the two positioning shafts 28 are both provided with positioning springs 30 for driving the corresponding positioning slide blocks to fold, the outer sides of the positioning springs 30 are provided with flat pads 29, a front adjusting cam 34 and a rear adjusting cam 35 for overcoming the elastic force of the positioning springs 30 to separate the left and right positioning slide blocks 31, 33 to the left and right sides are disposed on the adjusting shaft 24 between the left positioning slide block 31 and the right positioning slide block 33, the front adjusting cam 34 and the rear adjusting cam 35 are axially stopped by an open retainer ring 23 on the adjusting shaft 24, and the front end of the adjusting shaft 24 is provided with the adjusting finger 22.

Further preferably, an LED lamp 5 is provided at the front end of the housing, and a window 17-1 is provided at the front end of the upper housing 17 for observing the positioning of the drill 42. The front end of casing is equipped with the LED lamp, is equipped with the window at the front end of upper casing, can observe the drill bit at drill bit positioner's location condition, and the operator of being convenient for more operates, improves the efficiency and the degree of accuracy of location.

As a further preference, the left positioning slider 31 and the right positioning slider 33 are the same size. According to the structure, the left positioning slide block and the right positioning slide block can be interchanged, only two positioning slide blocks with one shape and one size are processed, and the front surfaces of the positioning slide blocks are opposite to each other and are arranged on the left side and the right side, so that the processing cost is saved, the symmetry of a ground drill bit can be improved, and the positioning precision is improved. Preferably, when the drill 42 is positioned, the rear side 31-4 of the right end surface of the front convex block, the front side 33-4 of the left end surface of the rear convex block and the axis of the drill 42 are in the same plane, so that the drill 42 can be stably and rotatably stopped at the positioning position more accurately. It should be noted that, if the left and

right positioning sliders

31 and 33 have good symmetry, the rear side 31-4 of the right end surface of the front protrusion and the front side 33-4 of the left end surface of the rear protrusion can both abut against the corresponding rake surfaces 0-4 of the drill 42 during positioning, and even if only one of the front and rear protrusions abuts against the rake surfaces 0-4, the circumferential positioning position of the drill 42 can also meet the requirement as long as the position is within the conventional finishing error.

Preferably, the right end face 31-2 of the front convex block and the left end face 33-2 of the rear convex block are parallel to each other and form an included angle of 8-12 degrees with the front-back direction, and the inner hole of the rotating sleeve 9 has an offset angle of 4-8 degrees, so as to adapt to the included angle between the two main cutting edges 0-1 of the drill 42 during grinding.

Further preferably, the inclined angles of the left positioning slide inclined surface 31-3 and the right positioning slide inclined surface 33-3 are adapted to the helix angle of the secondary cutting edge 0-3, for example, 45 ± 0.5 degrees; the minimum distance between the right end surface 31-2 of the front convex block and the left end surface 33-2 of the rear convex block of the left positioning slide block 31 and the right positioning slide block 33 is preferably 0.8 mm; the distance between the top ends of the left positioning slide inclined surface 31-3 and the right positioning slide inclined surface 33-3 is preferably 8.4 mm.

Compared with the prior art, the universal quick drilling and milling machine has the beneficial effects that: by adopting the technical scheme, when the front end of the drill bit is propped against the positioning terminal and is in a free state, the left and right positioning sliding blocks of the drill bit positioning device are folded under the elastic action of the sliding block driving mechanism, the right end surface of the front side lug is propped against one drill bit outer side tip of the drill bit, the left end surface of the rear side lug is propped against the other drill bit outer side tip of the drill bit, so that the drill bit is driven to rotate, the front sides of the front side lug right end surface and the rear side lug left end surface are propped against the front cutter face of the drill bit, the left and right positioning sliding blocks are blocked, the positioning is completed, in this state, the drill bit jacket is screwed downwards, the drill bit jacket drives the locking tray to move downwards along the guide groove, the locking tray downwards presses the clamping piece, the inclined plane of the clamping piece is extruded by the inner wall of the conical section to move inwards, so that the positioned drill bit is clamped, the grinder with the structure, the drill bit outer side tip and the front cutter face are creatively selected to perform three-dimensional positioning on the drill bit, the method perfectly solves the problems of poor universality: to the twist drill bits that the diameter is different, need debug the axial height of dog 421 correspondingly, this grinding efficiency that has just been lower greatly, and the high improper still can seriously influence this technological problem of grinding quality of debugging, to the different grinding twist drill bits of treating of diameter, all need not to debug the location benchmark of abrasive drilling machine, and the clamping location is simple swift, and is consuming time few, efficient, the grinding high quality of drill bit, life prolongs greatly. The drill chuck adopts a simple structure of a locking tray, organically combines a drill bit fastening sleeve and a clamping piece, has the functions of connection, axial and radial guiding and force transmission, and optimizes the existing structure of the drill chuck.

The further beneficial effects are that: because the lower end section of the rotating sleeve is sleeved in the inner hole of the supporting sleeve, and the two support lugs at the lower part of the supporting sleeve are hinged in corresponding hinge holes of the vertical plate of the fixed support through the shaft pins, the structure can ensure that the drill bit clamp inserted in the rotating sleeve can rotate around the shaft pins along with the supporting sleeve, when the supporting sleeve is adjusted according to requirements to rotate a preset angle around the shaft pins and is fixed, two main cutting edges with an included angle a meeting the requirement can be ground, in order to facilitate the adjustment of the preset angle of the supporting sleeve rotating around the shaft pins, the shell is marked with 110 degrees and 135 degrees, for example, when the drill bit is used for drilling hardwood, aluminum alloy and other materials, the drill bit is selected to be 118 degrees when the drill bit is used for drilling common steel, and when the drill bit is used for drilling cast iron, concrete and other materials, the 135 degrees are selected. The main cutting edge ground in this way meets the actual requirements better, and the drilling quality of the drill can be further improved.

Still further beneficial effect is: the size of the grinding drill bit is the same, the left positioning slide block and the right positioning slide block can be interchanged, and the two positioning slide blocks with one shape and one size can be machined, so that the machining cost is saved, the symmetry of the ground drill bit can be improved, and the positioning accuracy is improved. The front end of casing is equipped with the LED lamp, is equipped with the window at the front end of upper casing, can observe the drill bit at drill bit positioner's location condition, and the operator of being convenient for more operates, improves the efficiency and the degree of accuracy of location.

The further beneficial effects are as follows: the right end face of the front convex block and the left end face of the rear convex block are parallel to each other and form an included angle of 8-12 degrees with the front and rear directions, and the inner hole of the rotating sleeve has a deflection angle of 4-8 degrees.

Still further beneficial effect is: be equipped with left location slider inclined plane on the left side location slider, be equipped with right location slider inclined plane on the right side location slider, the inclination on left side location slider inclined plane and right location slider inclined plane suits with the helix angle of vice cutting edge (for example preferred personally submit 45 degrees contained angles with the level), and this kind of structure, the location of the different fluted drill of adaptation diameter that can be better improves the commonality of grinding the rig, and better realization is sharp and the three-dimensional positioning of rake face in two drill bit outsides of drill bit.

Among the above-mentioned each technical scheme, main cutting edge location grinding device and chisel edge location grinding device are designed according to drill bit circumferential angle and axial position in the drill chuck, insert the drill bit clamp of locating in main cutting edge location grinding device, the drill bit main cutting edge that its presss from both sides tight location just in time can contradict the grinding wheel and grind, insert the drill bit clamp of locating in chisel edge location grinding device, the drill bit chisel edge that its presss from both sides tight location also just in time can contradict the grinding wheel and grind, the grinding volume of drill bit main cutting edge and drill bit chisel edge is confirmed by the axial position of drill bit in the drill chuck. This is the same as the principle of the related art described in the background art, and is not described in detail.

Claims

1. A method of grinding a drill bit using a universal rapid grind drill, the universal rapid grind drill comprising: the drill bit clamp comprises a drill bit jacket (2), a locking tray (3) and a plurality of clamping pieces (4) which are arranged in the drill bit jacket (2) in a sliding mode, wherein the locking tray (3) and the clamping pieces (4) are installed in the drill bit jacket (2) in the sliding mode, an inclined plane (4-1) at the lower portion of the outer side of each clamping piece (4) is matched with the inner wall of a conical section (2-2) at the middle lower portion of the drill bit jacket (2), the upper end of each clamping piece (4) is arranged in a clamping piece sliding groove (3-1) corresponding to the lower end of the locking tray (3) in the sliding mode, the upper end portion of the drill bit jacket (2) is in threaded connection with a drill bit fastening sleeve (1), and a ring groove (3-2) at the upper end of the locking tray (3) is clamped on a convex ring (1-1) of the side wall, extending downwards, of the drill bit fastening sleeve (1); the drill bit positioning device comprises a positioning support (6) arranged on a bottom shell (38), and a positioning terminal (32) fixedly arranged at the lower part of the positioning support (6) and used for axially positioning a drill bit (42), wherein the upper end part of the positioning support (6) is provided with a first circular port (6-1) matched with a drill bit jacket (2) of a drill bit clamp; a left positioning sliding block (31) is arranged on the left side of the positioning support (6), a right positioning sliding block (33) is arranged on the right side of the positioning support (6), a front side protruding block (31-1) extending rightwards is arranged at the upper end of the left positioning sliding block (31), a left positioning sliding block inclined plane (31-3) is arranged on the rear side of the front side protruding block (31-1), a rear side protruding block (33-1) extending leftwards is arranged at the upper end of the right positioning sliding block (33), and a right positioning sliding block inclined plane (33-3) is arranged on the front side of the rear side protruding block (33-1);

the method is characterized by comprising the following steps:

Inserting a drill bit clamp into a positioning bracket (6), clamping two symmetrically arranged drill bit clamp positioning convex blocks (2-1) into corresponding first positioning bayonets (6-2), inserting a drill bit (42) into a drill bit adapter sleeve (1) and penetrating through clamping pieces (4), and separating left and right positioning sliders (31, 33) towards the left and right sides by overcoming the elasticity of a slider driving mechanism through rotating an adjusting pull finger (22) so that the drill bit (42) can continuously push downwards to contact a positioning terminal (32);

when the front end of the drill bit (42) is abutted against the positioning terminal (32), the drill bit (42) is stopped being pressed downwards, the drill bit (42) is enabled to be in a free state, the adjusting pull finger (22) is released, the left and right positioning sliders (31, 33) are folded under the elastic action of the slider driving mechanism, the right end face (31-2) of the front side bump is abutted against one drill bit outer side tip (0-6) of the drill bit (42), the left end face (33-2) of the rear side bump is abutted against the other drill bit outer side tip (0-6) of the drill bit (42), so that the drill bit (42) is driven to rotate, and when the rear side (31-4) of the right end face of the front side bump and the front side (33-4) of the left end face of the rear side bump are abutted against the rake faces (0-4) of the drill bit (42), the left and right positioning sliders (31, 33) are blocked, and positioning is completed;

screwing the drill bit clamping sleeve (2) downwards to enable the drill bit clamping sleeve (2) to drive the locking tray (3) to move downwards along the guide groove, the locking tray (3) presses the clamping piece (4) downwards, the inclined surface (4-1) of the clamping piece (4) is extruded by the inner wall of the conical section (2-2) to move inwards to clamp the drill bit (42), and at the moment, the drill bit fastening sleeve (1), the drill bit clamping sleeve (2), the locking tray (3), the clamping piece (4) and the drill bit (42) are fastened together to form a drill bit clamp whole;

step two: grinding of the main cutting edge of a drill

The whole drill bit clamp is pulled out of the positioning support (6) and inserted into a rotating sleeve (9) of a main cutting edge positioning and grinding device, two symmetrically arranged drill bit clamp positioning convex blocks (2-1) are clamped in corresponding second positioning bayonets (9-2), a dustproof switch (7) is started, a CBN grinding wheel (27) is driven by a motor (25) to grind one main cutting edge (0-1) of a drill bit (42), after grinding is finished, the whole drill bit clamp is pulled out and rotated 180 degrees and inserted into the rotating sleeve (9) again, and the other main cutting edge (0-1) of the drill bit (42) is ground;

step three: grinding of chisel edges of drill bits

After the main cutting edge is ground, the drill chuck is integrally pulled out and inserted into the fixed support (20), two symmetrically arranged drill chuck positioning convex blocks (2-1) are clamped in the corresponding third positioning bayonets (20-2), the chisel edge (0-2) of the drill (42) is ground through the CBN grinding wheel 27, and after the grinding is finished, the drill chuck is pulled out and integrally rotated 180 degrees and then inserted into the fixed support (20) for grinding again.

2. The method for using the universal rapid drilling and milling machine according to claim 1, characterized in that:

step four: in the second step, before the two main cutting edges (0-1) are ground, the whole drill bit clamp is pushed to rotate around the shaft pin (13) by a preset angle along with the support sleeve (14) according to needs, then the locking knob (19) is screwed to fix the support sleeve (14), and the preset angle is the scale range of 110 plus 135 degrees marked on the machine shell.

3. The method for using the universal rapid drilling and milling machine according to claim 1, characterized in that:

step five: in the second step, when the main cutting edge is ground, the rotating sleeve (9) is rotated in a reciprocating mode for a plurality of times within the range of 0-60 degrees, so that the main rear cutter face has a preset radian, and the service life of the ground drill is prolonged.