Drill bit sharpening mechanism

Abstract

The present invention relates to a drill bit sharpening mechanism in the field of mechanical processing technology, comprising a bracket, the bracket is connected to a guide rail, a slide seat is arranged on the guide rail, the slide seat is provided with a matching center hole, a turntable is arranged on the slide seat, a V-shaped groove is arranged on the turntable, a cylindrical center boss is arranged under the turntable, the turntable and the slide seat can rotate along the axis of the matching center hole, and a turntable locking screw is arranged at the right end of the slide seat; the bracket is provided with a horizontal adjustment groove and a vertical adjustment groove, the horizontal adjustment groove is provided with a fixing screw, and the fixing seat and the bracket are connected; the vertical adjustment groove is provided with a spring and a rolling bearing, and a connecting screw passes through the spring and the rolling bearing and is connected to the left end of the guide rail; the connecting screw, the rolling bearing, the guide rail, the slide seat and the turntable and other components can be moved vertically and can also be rotated along the axis of the rolling bearing, and the angle adjustment groove is provided with an angle limit pin rod; the present invention can accurately grind the top angle and the main back angle of the drill bit by adjusting the turntable and the angle limit pin rod, ensure the symmetry of the main cutting edges on both sides of the drill bit after grinding, and improve the efficiency and quality of sharpening.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing fixture technology and equipment, in particular to a drill bit sharpening mechanism. Background Art

[0002] Drilling technology is required in mechanical processing, assembly and equipment maintenance. Drilling is an indispensable processing technology in the mechanical field. The quality of drilling directly affects the assembly quality and the service life of the equipment. The tool required for drilling is the drill bit. The quality of drill bit processing directly affects the quality of the hole. During the drilling process, the drill bit is prone to wear and breakage. In order to improve the quality of drilling, improve production efficiency, and reduce production costs, the used drill bit needs to be re-sharpened under the drilling requirements. The sharpened drill bit is put back into use like a new drill bit. At the same time, since most of the drill bits on the market are standard drill bits, and the drill bit geometric angles required for different materials in the daily drilling process are also different, in order to meet the requirements, we need to sharpen the drill bit. The sharpening mechanism is a mechanism for sharpening the drill bit.

[0003] At present, drill bit sharpening in most domestic enterprises is mainly done by skilled workers directly on the grinding wheel, which requires high technical skills and is difficult for workers. The geometric angle of the drill bit and the symmetry of the two main cutting edges are difficult to guarantee. Even skilled technicians have to perform repeated sharpening and testing, which consumes a lot of time and manpower. The quality of drill bit sharpening directly affects the quality of the drilled hole, drilling efficiency, and drill bit service life. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art and enable ordinary workers to easily master the drill bit sharpening skills, the present invention provides a drill bit sharpening mechanism.

[0005] The technical solution used in the present invention is as follows:

[0006] A drill bit sharpening mechanism comprises a bracket, the bracket is connected to a guide rail, a slide seat is arranged on the guide rail, the slide seat is provided with a matching center hole, a turntable is arranged on the slide seat, a V-shaped groove is arranged on the turntable along the diameter direction, a cylindrical center boss is arranged under the turntable, the turntable can rotate along the axis of the matching center hole, a boss is arranged on the right end of the slide seat, and a turntable locking screw is arranged on the boss;

[0007] The bracket is provided with a transverse adjustment slot, a vertical adjustment slot and an angle adjustment slot. The transverse adjustment slot is provided with a fixing screw, which connects the fixing seat with the bracket. The bracket can move horizontally along the transverse adjustment slot.

[0008] A rolling bearing is provided in the vertical adjustment groove, and the connecting screw passes through the spring and the rolling bearing and is connected to the left end of the guide rail; the assembly consisting of the connecting screw, the rolling bearing, the guide rail, the slide seat and the turntable can move in the vertical direction along the vertical adjustment groove and can also rotate along the axis of the rolling bearing; an angle limit pin is provided in the angle adjustment groove, and the limit pin can move in the vertical direction.

[0009] The connecting screw and the rolling bearing can be fixed at any position in the vertical adjustment slot; the angle limit pin can also be fixed at any position in the angle adjustment slot.

[0010] Furthermore, an arrow line is provided on the turntable along the diameter direction, and correspondingly, an angle scale is provided on the slide seat near the circumference of the turntable; a spring is provided between the connecting screw and the rolling bearing, and the rolling bearing is a plane needle bearing; the slide seat and the turntable can slide along the guide rail.

[0011] A spring is arranged between the connecting screw and the rolling bearing to play the role of automatic tensioning, so that the rotation is more stable. The rolling bearing is preferably a plane needle bearing, which has the advantages of high load, high rigidity, compact structure and long life; the slide seat and the turntable can slide along the guide rail; the V-shaped groove on the turntable is suitable for placing drill bits of different diameters.

[0012] When the present invention is used, the height of the sharpening mechanism and the distance from the grinding wheel are first adjusted according to the size of the grinding wheel diameter, and then the turntable angle and the angle limit pin are adjusted according to the geometric angle required for sharpening the drill bit. The grinding machine is started, the drill handle is held with the left hand, and the drill head is pressed firmly into the V-shaped groove with the right hand to carry out the sharpening operation.

[0013] The beneficial effects of the present invention are:

[0014] 1) A rotatable turntable is set up to easily adjust the angle of the drill bit on the turntable, so that drill bits of different angles and sizes can be sharpened; the turntable, guide rail, slide seat, etc. can rotate along the axis connecting the screw and the rolling bearing, which is convenient for processing various parts of the drill bit; the top angle and main clearance angle of the drill bit can be accurately sharpened according to the set plan to ensure that the main cutting edges on both sides of the drill bit after grinding are symmetrical and consistent, and the main clearance angle meets the requirements;

[0015] 2) The turntable and the slide can move along the guide rail, so that the contact area between the drill bit to be sharpened and the circumference of the grinding wheel is increased, the sharpening is more uniform and the service life of the grinding wheel is extended;

[0016] 3) Use plane needle roller bearings, which have high load, high rigidity, stable operation, suitable for fine processing of drill bits, safe and reliable;

[0017] 4) Set the angle limit pin to support the slide, turntable and drill bit to ensure that the main clearance angle after grinding meets the requirements;

[0018] 5) The present invention has a simple structure, accurate and quick operation, low technical requirements for operators, reduced labor intensity, improved production efficiency, guaranteed processing quality, easy manufacturing, and great value for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic cross-sectional view of a drill bit sharpening mechanism.

[0020] Figure 2 A schematic top view of a drill bit sharpening mechanism.

[0021] Figure 3 A left side schematic diagram of a drill bit sharpening mechanism.

[0022] Figure 4 A right side schematic diagram showing the relationship among a turntable, a slide seat and a guide rail in a drill bit sharpening mechanism.

[0023] Figure 5 A schematic top view of the working process of a drill bit sharpening mechanism.

[0024] Figure 6 A left-side schematic diagram of the relationship between the drill bit and the grinding wheel during the working process of a drill bit sharpening mechanism.

[0025] In the figure: 1-turntable, 2-V-shaped groove, 3-turntable locking screw, 4-slide seat, 5-guide rail, 6-screw, 7-bracket, 8, 9-plane needle bearings, 10-spring, 11-connecting screw, 12-angle limit pin, 13-fixing screw, 14-fixing seat, 15, 16-screw, 17-lateral adjustment slot, 18-vertical adjustment slot, 19-angle adjustment slot, 20-dial, 21-threaded hole. DETAILED DESCRIPTION

[0026] Figure 1 A cross-sectional schematic diagram of a drill bit sharpening mechanism, Figure 2 A top view schematic diagram of a drill bit sharpening mechanism, which includes a bracket 7, the bracket is connected to a guide rail 5, a slide seat 4 is arranged on the guide rail, the slide seat 4 is provided with a matching center hole, a turntable 1 is arranged on the slide seat, a V-shaped groove 2 is arranged on the turntable 1 along the diameter direction, a cylindrical center boss is arranged under the turntable 1, the turntable 1 can rotate along the axis of the matching center hole, a boss is arranged at the right end of the slide seat 4, and a turntable locking screw 3 is arranged on the boss.

[0027] The bracket 7 is provided with a transverse adjustment slot 17 , a vertical adjustment slot 18 and an angle adjustment slot 19 . The transverse adjustment slot 17 is provided with a fixing screw 13 . The fixing screw 13 connects the fixing seat 14 with the bracket 7 . The bracket 7 can move horizontally along the transverse adjustment slot 17 .

[0028] A spring 10 and rolling bearings 8 and 9 are provided in the vertical adjustment groove 18, and a connecting screw 11 passes through the spring 10 and rolling bearings 8 and 9 and is connected to the left end of the guide rail 5; the assembly consisting of the connecting screw 11, rolling bearings 8 and 9, and the guide rail 5, the slide seat 4 and the turntable 1 can move in the vertical direction along the vertical adjustment groove 18 and can also rotate along the axis of the rolling bearings 8 and 9; an angle limit pin 12 is provided in the angle adjustment groove 19, and the limit pin 12 can move in the vertical direction.

[0029] An arrow line is provided on the turntable 1 along the diameter direction, and correspondingly, an angle scale 20 is provided on the slide seat 4 near the circumference of the turntable 1; a spring 10 is provided between the connecting screw 11 and the rolling bearing 9, and the rolling bearing is a plane needle bearing; the slide seat 4 and the turntable 1 can slide along the guide rail 5.

[0030] The working process of the present invention takes the standard twist drill sharpening as an example:

[0031] In the first step, a drill bit sharpening mechanism is fixed on a bench grinder with screws 15 and 16;

[0032] The second step is to place the drill bit to be sharpened on the V-groove 2, and adjust the connecting screw 11 according to the diameter of the grinding wheel to adjust the guide rail 5, slide seat 4, turntable 1 and other components along the vertical adjustment groove 18 so that the main cutting edge of the drill bit is slightly higher than the horizontal center line of the grinding wheel.

[0033] The third step is to adjust the tension of the spring 10 by connecting the screw rod 11 to ensure that the guide rail 5 rotates smoothly without axial movement.

[0034] The fourth step is to adjust the distance between the drill bit sharpening mechanism and the grinding wheel by fixing the screw 13. It is necessary to ensure that the turntable 1 and the slide seat 4 components have a sufficient safety distance from the grinding wheel and cannot collide with each other. Generally, the distance is about 5 mm.

[0035] Step 5. Rotate the turntable 1 so that the arrow is aligned with the scale 58. o -60 o , which is the angle between the drill bit axis and the grinding wheel axis, that is, the vertex angle (118 o ±2 o ) half, tighten the turntable locking screw 3, as shown Figure 5 .

[0036] Step 6: Adjust the angle limit pin 12 so that the drill head tilts downward by about 8 o -15 o ,like Figure 6 .

[0037] After adjusting the above steps, you can start sharpening the standard twist drill. When sharpening, you can grind one side first and then the other side. If the grinding amount is large, you can also grind the two sides alternately. The two main cutting edges of the drill ground by a drill grinding mechanism are symmetrical, and the geometric angles meet the requirements of the standard twist drill.

Claims

1. A drill bit sharpening mechanism, characterized in that: It comprises a bracket (7), the bracket is connected to a guide rail (5), a slide seat (4) is arranged on the guide rail, the slide seat (4) is provided with a matching center hole, a turntable (1) is arranged on the slide seat, a V-shaped groove (2) is arranged on the turntable (1) along the diameter direction, and the drill bit to be sharpened is placed on the V-shaped groove (2); a cylindrical center boss is arranged below the turntable (1), and the turntable (1) can rotate along the axis of the matching center hole; a boss is arranged at the right end of the slide seat (4), and a turntable locking screw (3) is arranged on the boss; The bracket (7) is provided with a transverse adjustment slot (17), a vertical adjustment slot (18) and an angle adjustment slot (19); the transverse adjustment slot (17) is provided with a fixing screw (13); the fixing screw (13) connects the fixing seat (14) with the bracket (7); and the bracket (7) can move in a horizontal direction along the transverse adjustment slot (17); The vertical adjustment groove (18) is provided with a rolling bearing (8, 9), a connecting screw (11) is installed in the rolling bearing (8, 9), a spring (10) is provided between the connecting screw (11) and the rolling bearing (8, 9), the connecting screw (11) passes through the spring (10) and the rolling bearing (8, 9), and is connected to the left end of the guide rail (5); the connecting screw (11), the rolling bearing (8, 9), the guide rail (5), the slide seat (4) and the turntable (1) can move in the vertical direction along the vertical adjustment groove (18), and can also rotate along the axis of the rolling bearing (8, 9); the angle adjustment groove (19) is provided with an angle limit pin (12), and the limit pin (12) can move in the vertical direction; The turntable (1) is provided with an arrow line along the diameter direction, and correspondingly, an angle scale (20) is provided on the slide seat (4) near the circumference of the turntable (1); the rolling bearings (8, 9) are plane needle bearings; the slide seat (4) and the turntable (1) can slide along the guide rail (5), and the drill bit sharpening mechanism uses screws (15, 16) to fix the fixed seat (14) on the desktop grinder.

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