CN110293457B

CN110293457B - Method and device for manually sharpening drill bit

Info

Publication number: CN110293457B
Application number: CN201910563217.6A
Authority: CN
Inventors: 朱建亚; 杨滨涛; 陶建民
Original assignee: AECC Guizhou Liyang Aviation Power Co Ltd
Current assignee: AECC Guizhou Liyang Aviation Power Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2022-02-11
Anticipated expiration: 2039-06-26
Also published as: CN110293457A

Abstract

The invention discloses a method and a device for manually sharpening a drill bit, wherein the device comprises a sample plate main body (1), a cylindrical groove (2) is formed in the surface of the sample plate main body (1), a sample plate head (3) is arranged on the sample plate main body (1) along the axial direction of the cylindrical groove (2), the sample plate head (3) comprises a plane end face tangent to the cylindrical groove (2), a tip (4) equal to the sharp angle of the drill bit is arranged at the tail end of the sample plate head (3) on the plane end face, and two sides of the tip (4) are connected with the sample plate main body (1) through arc-shaped edges (5). The invention improves the efficiency of ordinary operators for sharpening the drill bit and solves the problem of poor machining effect after the drill bit is ground due to unqualified sharpening technology.

Description

Method and device for manually sharpening drill bit

Technical Field

The invention relates to a method and a device for rapid manual sharpening of a common drill bit, belonging to the technical field of machining.

Background

With the reformation and development of the manufacturing industry, the numerical control cutter gradually replaces the traditional common cutter, but the common cutter has an extremely thick function in the part manufacturing process sometimes.

Especially for sharpening the common drill bit, a well-ground drill bit can drill more holes than a numerical control alloy drill bit. Therefore, it is necessary to design a new method for sharpening drill bits, aiming at solving three common defects of the traditional general sharpening drill bits:

(1) the drill bit is deviated, so that the lengths of the two main cutting edges are inconsistent;

(2) the heights of the two main cutting edges are different;

(3) the chisel edge is not centered and the center is offset.

Disclosure of Invention

The invention aims to provide a method and a device for manually sharpening a drill bit, so that the efficiency of sharpening the drill bit by common operators is improved, and the problem of poor machining effect after the drill bit is ground due to unqualified sharpening technology is solved.

Specifically, the technical scheme of the invention is as follows:

the utility model provides a device of manual sharpening drill bit, includes the model main part, open on the surface of model main part has the cylinder groove, there is a model head in the model main part and along cylinder groove axis direction, the model head includes a plane terminal surface tangent with the cylinder groove, and the model head is in the end of plane terminal surface has a pointed end that equals with the drill bit sharp angle, and the both sides of pointed end are passed through the arc limit and are connected with the model main part.

Further, the template body is cubic.

Furthermore, the cylindrical groove is a semi-cylindrical groove, and the groove width of the cylindrical groove is larger than or equal to the outer diameter of the drill bit.

Further, the width of the tip is equal to the diameter of the cylindrical groove.

A method of manually sharpening a drill bit comprising the steps of:

the first step is as follows: grinding the sharp angle of the drill bit, putting the drill bit to be ground into a cylindrical groove, holding a sample plate device with one hand, and supporting the drill bit with the other hand on a grinding wheel bracket to enable the drill tail to move up and down in the cutter grinding device according to the shape of the top end of the sample plate head, and simultaneously rotate around the axis of the drill bit to ensure that the half sharp angle alpha of each side of the drill bit is equal to the half angle of the top end (namely, half included angle of the top end);

the second step is that: grinding the chisel edge, grinding the drill bit to the grinding wheel angle along the direction of the sample plate head, ensuring that a grinding point is on the central plane of the grinding wheel, ensuring that the outer edge of the drill bit moves back to the drill center, grinding the front angle and the edge oblique angle of the inner edge of the drill bit, and constantly using the edge grinding device to check the symmetry and the height of the inner edge of the drill point on two sides;

the third step: grinding a crescent arc, fixing a ground drill point of the drill by using the cutter grinding device to ensure that the drill point is basically horizontal, leaning a proper inclined sample plate to the side surface of the grinding wheel to ensure the suitability of the depth of the arc groove, and checking whether the point height, the edge length and the arc groove are symmetrical by using the cutter grinding device at any time;

the fourth step: grinding the chip dividing groove, selecting a sheet-shaped grinding wheel to sharpen the side back of the chip dividing groove according to the shape of the sample plate head, finishing the sharpening of the chip dividing groove by taking the sharpening device as a reference, and ensuring the symmetry of the chip dividing groove by comparing with the sample plate head of the sharpening device, thereby finishing the sharpening of a qualified drill bit.

Compared with the prior art, the invention has the following characteristics:

(1) the invention is a new idea of sharpening the drill bit, can greatly accelerate the efficiency of sharpening the drill bit by field operators and reduce the problem of improper or unqualified sharpening of the drill bit caused by the problem of manipulations.

(2) The invention provides a new idea for sharpening the common drill bit, and the sharpening device has simple structure and is easy to popularize.

(3) The drill bit sharpened by the new method has good processing effect, more than 50 holes on a supporting seat part of a certain model can be continuously processed after sharpening, the processing efficiency is greatly improved and the repeated sharpening work of operators is reduced compared with the case that only about 18 holes are processed without a sharpening device.

(4) The cost is reduced, after the novel method is used, the abrasion effect of the common drill bit is effectively controlled, and then, when a support seat part of a certain model is processed, the expensive numerical control alloy drill bit can be replaced, so that the method has great popularization value.

Drawings

FIGS. 1 to 3 are

Three views of the size design of the drill sharpening device;

FIG. 4 is a perspective view of the drill sharpening apparatus;

figure 5 is sharpening

The use method of the drill sharpening device is schematically shown;

FIG. 6 is a drawing showing

A schematic side view of a drill sharpening apparatus;

in the figure, 1 is a sample plate main body, 2 is a cylindrical groove, 3 is a sample plate head, 4 is a tip end, and 5 is an arc edge.

Detailed Description

The technical solution of the present invention is further explained below with reference to the accompanying drawings, but the claimed protection scope is not limited to the above.

The thought of the manual sharpening drill bit mainly comprises the following three points:

the first point is as follows: designing a sharpening device, namely designing a sample drawing of the sharpening device of the drill bit according to the diameter and the drill point angle of a common drill bit;

and a second point: and (3) manufacturing a sharpening device, namely performing field processing according to the drawing of the sharpening tool to manufacture a sharpening drill sample plate device.

And a third point: in practical application, the sharpening device is used for sharpening the drill bit.

The detailed dimension schematic diagram of the sharpening device is shown in figures 1-3, in this embodiment, the sharpening device is designed for sharpening a common drill bit with the diameter of 12mm, and the three-dimensional schematic diagram is shown in figure 4. The blank material of the sharpening device is selected from a common No. 45 steel part, and the sharpening device is machined according to the size of a drawing by using a numerical control machine. The sharpening device includes model main part 1, model main part 1 is the cube form, it has cylinder groove 2 to open on model main part 1's the surface, cylinder groove 1 is the semi-cylindrical groove, its groove width equals the drill bit external diameter, there is a model head 3 on the model main part 1 and along 2 axis directions in cylinder groove, model head 3 includes a plane terminal surface (being on a parallel with the axis of cylinder groove 2) tangent with cylinder groove 2, and the end of model head 3 on the plane terminal surface has a pointed end 4 that equals with the drill bit sharp angle, the width of pointed end 4 equals the diameter of cylinder groove 2, the both sides of pointed end 4 are passed through arc limit 5 and are connected with model main part 1. The entire sharpening device is side-to-side symmetric about the angular bisector of the tip 4, and the axis of the cylindrical slot 2 is on this angular bisector.

The specific use method of the sharpening device mainly comprises 4 steps:

the first step is as follows: grinding a 118-degree angle, placing a drill bit with a diameter of 12mm to be ground into a cylindrical groove 2 of a sample plate main body 1 in a mode of schematic diagrams of figures 5 and 6, holding a sharpening device by one hand, and supporting the drill bit on a grinding wheel bracket by the other hand to enable a drill tail to move up and down in the sharpening device according to the shape of the full angle 118 degrees of the tip 4 of a sample plate head 3 (namely, the 118-degree angle of the tip 4 is used as a sample plate), and simultaneously rotating around the axis of the drill bit (namely, the sharpening device is held in a palm, the drill bit is pressed by a thumb to be pushed up and down in the cylindrical groove 2 and pushed left and right to realize rotation), so that the half-edge angle alpha of each side of the drill bit is about 59 degrees.

The second step is that: grinding the chisel edge, grinding the grinding wheel angle along the direction of the template head 3 by the drill bit, ensuring that the grinding point is on the central plane of the grinding wheel, ensuring that the outer edge of the drill bit moves back to the drill center, grinding out the front angle and the edge bevel angle of the inner edge of the drill bit, and constantly using the sharpening device to check the symmetry degree and the height of the inner edge of the two sides of the drill tip (by using the high symmetry of the sharpening device, namely the size or the angle of the template head 3 and the tip 4 as a comparison reference, the two sides and the height of the inner edge of the drill tip are unchanged relative to the reference or meet the requirements when the two sides and the height of the inner edge of the drill tip are equal to a constant designated value).

The third step: grinding a crescent arc, fixing a ground drill point by using a sharpening device to ensure that the drill point is basically horizontal, leaning the sharpening device to the side surface of the grinding wheel by properly inclining the sharpening device to ensure the suitability of the depth of the arc groove (namely whether the depth meets the requirement), and checking whether the point height, the edge length and the arc groove are symmetrical by the sharpening device at any time (by using the high symmetry of the sharpening device, namely the size or the angle of the template head 3 and the point 4 as a comparison reference, judging the symmetry by the distance or the angle to a specific edge or plane).

The fourth step: grinding the chip dividing groove, selecting a sheet-shaped grinding wheel to grind the side rear surface of the chip dividing groove according to the shape of the sample plate head, finishing the grinding of the chip dividing groove by taking a grinding device as a reference, and ensuring the symmetry of the chip dividing groove by comparing with the sample plate head 3 of the grinding device, thereby finishing the grinding of a qualified drill bit.

It should be noted that:

1. when grinding a drill by means of a drill sharpening device, attention is first paid to the fact that the feed cannot be over-advanced during sharpening, mainly a few times, in order to avoid the surface of the sharpening device being ground.

2. The middle of the sample plate main body 1 is provided with a cylindrical groove 2, and the radian size of a drill tip is naturally formed in a manual rotating mode.

The above is the main implementation method of the invention, and the method is easy for general bench workers to operate and has the characteristic of easy learning. Meanwhile, the method for manually sharpening the drill bit has the advantages that the durability of the drill bit with the edge ground is high, the drill bit can be sharpened quickly, and the method has great popularization and application values.

By analogy, on the basis of the embodiment, various changes can be made, and the sharpening device with different diameters but basically the same style and principle is designed, so that the aim of the invention can be achieved. Such variations are intended to be within the scope of the invention as defined in the claims.

Claims

1. A sharpening method is characterized in that: the adopted manual sharpening drill bit device comprises a sample plate main body (1), wherein a cylindrical groove (2) is formed in the surface of the sample plate main body (1), a sample plate head (3) is arranged on the sample plate main body (1) along the axis direction of the cylindrical groove (2), the sample plate head (3) comprises a plane end face tangent to the cylindrical groove (2), a tip (4) equal to the sharp angle of a drill bit is arranged at the tail end of the plane end face of the sample plate head (3), and two sides of the tip (4) are connected with the sample plate main body (1) through arc-shaped edges (5); the cylindrical groove is a semi-cylindrical groove, the groove width of the cylindrical groove is equal to the outer diameter of the drill bit, and the width of the tip (4) is equal to the diameter of the cylindrical groove (2); the whole sharpening device is symmetrical left and right about an angular bisector of the tip (4), and the axis of the cylindrical groove (2) is on the angular bisector;

the sharpening method comprises the following steps:

the first step is as follows: grinding the sharp angle of the drill bit, putting the drill bit to be ground into a cylindrical groove (2), holding a sample plate main body (1) with one hand, and supporting the drill bit on a grinding wheel bracket with the other hand to enable a drill tail to move up and down in a cutter grinding device according to the shape of a top end (4) of a sample plate head (3) and rotate around the axis of the drill bit to ensure that the half sharp angle alpha of each side of the drill bit is equal to the half angle of the top end (4);

the second step is that: grinding the chisel edge, grinding the grinding wheel angle of the drill bit along the direction of the template head (3), ensuring that a grinding point is on the central plane of the grinding wheel, ensuring that the outer edge of the drill bit moves back to the drill center, grinding out the front angle and the oblique angle of the inner edge of the drill bit, and checking the symmetry and the height of the inner edge of two surfaces of the drill point by using a cutter grinding device;

the third step: grinding a crescent arc, fixing a ground drill point of the drill by using a cutter grinding device to ensure that a drill edge is basically horizontal, properly inclining the cutter grinding device to lean against the side surface of a grinding wheel to ensure the depth of an arc groove, and checking whether the point height, the edge length and the arc groove are symmetrical by using the cutter grinding device;

the fourth step: grinding the chip dividing groove, selecting a sheet-shaped grinding wheel to sharpen the side rear surface of the chip dividing groove according to the shape of the template head (3), finishing the sharpening of the chip dividing groove by taking a sharpening device as a reference, and ensuring the symmetry of the chip dividing groove by comparing with the template head (3) of the sharpening device, thereby finishing the sharpening of a qualified drill bit.

2. A method of sharpening as defined in claim 1, wherein: the sample plate main body (1) is cubic.